diff options
Diffstat (limited to 'drivers/scsi')
38 files changed, 23605 insertions, 7 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 4a1f029c4fe9..8d9dae89f065 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -830,6 +830,19 @@ config SCSI_GDTH To compile this driver as a module, choose M here: the module will be called gdth. +config SCSI_ISCI + tristate "Intel(R) C600 Series Chipset SAS Controller" + depends on PCI && SCSI + depends on X86 + # (temporary): known alpha quality driver + depends on EXPERIMENTAL + select SCSI_SAS_LIBSAS + ---help--- + This driver supports the 6Gb/s SAS capabilities of the storage + control unit found in the Intel(R) C600 series chipset. + + The experimental tag will be removed after the driver exits alpha + config SCSI_GENERIC_NCR5380 tristate "Generic NCR5380/53c400 SCSI PIO support" depends on ISA && SCSI diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 7ad0b8a79ae8..3c08f5352b2d 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -73,6 +73,7 @@ obj-$(CONFIG_SCSI_AACRAID) += aacraid/ obj-$(CONFIG_SCSI_AIC7XXX_OLD) += aic7xxx_old.o obj-$(CONFIG_SCSI_AIC94XX) += aic94xx/ obj-$(CONFIG_SCSI_PM8001) += pm8001/ +obj-$(CONFIG_SCSI_ISCI) += isci/ obj-$(CONFIG_SCSI_IPS) += ips.o obj-$(CONFIG_SCSI_FD_MCS) += fd_mcs.o obj-$(CONFIG_SCSI_FUTURE_DOMAIN)+= fdomain.o diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index c6c0434d8034..6bba23a26303 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -1037,6 +1037,7 @@ static void complete_scsi_command(struct CommandList *cp) unsigned char sense_key; unsigned char asc; /* additional sense code */ unsigned char ascq; /* additional sense code qualifier */ + unsigned long sense_data_size; ei = cp->err_info; cmd = (struct scsi_cmnd *) cp->scsi_cmd; @@ -1051,10 +1052,14 @@ static void complete_scsi_command(struct CommandList *cp) cmd->result |= ei->ScsiStatus; /* copy the sense data whether we need to or not. */ - memcpy(cmd->sense_buffer, ei->SenseInfo, - ei->SenseLen > SCSI_SENSE_BUFFERSIZE ? - SCSI_SENSE_BUFFERSIZE : - ei->SenseLen); + if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo)) + sense_data_size = SCSI_SENSE_BUFFERSIZE; + else + sense_data_size = sizeof(ei->SenseInfo); + if (ei->SenseLen < sense_data_size) + sense_data_size = ei->SenseLen; + + memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size); scsi_set_resid(cmd, ei->ResidualCnt); if (ei->CommandStatus == 0) { @@ -2580,7 +2585,8 @@ static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp) c->SG[0].Ext = 0; /* we are not chaining*/ } hpsa_scsi_do_simple_cmd_core(h, c); - hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL); + if (iocommand.buf_size > 0) + hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL); check_ioctl_unit_attention(h, c); /* Copy the error information out */ diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index b7650613b8c2..bdfa223a7dbb 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -4306,8 +4306,8 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost) spin_lock_irqsave(vhost->host->host_lock, flags); if (rc == H_CLOSED) vio_enable_interrupts(to_vio_dev(vhost->dev)); - else if (rc || (rc = ibmvfc_send_crq_init(vhost)) || - (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { + if (rc || (rc = ibmvfc_send_crq_init(vhost)) || + (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); } diff --git a/drivers/scsi/isci/Makefile b/drivers/scsi/isci/Makefile new file mode 100644 index 000000000000..3359e10e0d8f --- /dev/null +++ b/drivers/scsi/isci/Makefile @@ -0,0 +1,8 @@ +obj-$(CONFIG_SCSI_ISCI) += isci.o +isci-objs := init.o phy.o request.o \ + remote_device.o port.o \ + host.o task.o probe_roms.o \ + remote_node_context.o \ + remote_node_table.o \ + unsolicited_frame_control.o \ + port_config.o \ diff --git a/drivers/scsi/isci/firmware/Makefile b/drivers/scsi/isci/firmware/Makefile new file mode 100644 index 000000000000..5f54461cabc5 --- /dev/null +++ b/drivers/scsi/isci/firmware/Makefile @@ -0,0 +1,19 @@ +# Makefile for create_fw +# +CC=gcc +CFLAGS=-c -Wall -O2 -g +LDFLAGS= +SOURCES=create_fw.c +OBJECTS=$(SOURCES:.cpp=.o) +EXECUTABLE=create_fw + +all: $(SOURCES) $(EXECUTABLE) + +$(EXECUTABLE): $(OBJECTS) + $(CC) $(LDFLAGS) $(OBJECTS) -o $@ + +.c.o: + $(CC) $(CFLAGS) $< -O $@ + +clean: + rm -f *.o $(EXECUTABLE) diff --git a/drivers/scsi/isci/firmware/README b/drivers/scsi/isci/firmware/README new file mode 100644 index 000000000000..8056d2bd233b --- /dev/null +++ b/drivers/scsi/isci/firmware/README @@ -0,0 +1,36 @@ +This defines the temporary binary blow we are to pass to the SCU +driver to emulate the binary firmware that we will eventually be +able to access via NVRAM on the SCU controller. + +The current size of the binary blob is expected to be 149 bytes or larger + +Header Types: +0x1: Phy Masks +0x2: Phy Gens +0x3: SAS Addrs +0xff: End of Data + +ID string - u8[12]: "#SCU MAGIC#\0" +Version - u8: 1 +SubVersion - u8: 0 + +Header Type - u8: 0x1 +Size - u8: 8 +Phy Mask - u32[8] + +Header Type - u8: 0x2 +Size - u8: 8 +Phy Gen - u32[8] + +Header Type - u8: 0x3 +Size - u8: 8 +Sas Addr - u64[8] + +Header Type - u8: 0xf + + +============================================================================== + +Place isci_firmware.bin in /lib/firmware +Be sure to recreate the initramfs image to include the firmware. + diff --git a/drivers/scsi/isci/firmware/create_fw.c b/drivers/scsi/isci/firmware/create_fw.c new file mode 100644 index 000000000000..c7a2887a7e95 --- /dev/null +++ b/drivers/scsi/isci/firmware/create_fw.c @@ -0,0 +1,99 @@ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <string.h> +#include <errno.h> +#include <asm/types.h> +#include <strings.h> +#include <stdint.h> + +#include "create_fw.h" +#include "../probe_roms.h" + +int write_blob(struct isci_orom *isci_orom) +{ + FILE *fd; + int err; + size_t count; + + fd = fopen(blob_name, "w+"); + if (!fd) { + perror("Open file for write failed"); + fclose(fd); + return -EIO; + } + + count = fwrite(isci_orom, sizeof(struct isci_orom), 1, fd); + if (count != 1) { + perror("Write data failed"); + fclose(fd); + return -EIO; + } + + fclose(fd); + + return 0; +} + +void set_binary_values(struct isci_orom *isci_orom) +{ + int ctrl_idx, phy_idx, port_idx; + + /* setting OROM signature */ + strncpy(isci_orom->hdr.signature, sig, strlen(sig)); + isci_orom->hdr.version = version; + isci_orom->hdr.total_block_length = sizeof(struct isci_orom); + isci_orom->hdr.hdr_length = sizeof(struct sci_bios_oem_param_block_hdr); + isci_orom->hdr.num_elements = num_elements; + + for (ctrl_idx = 0; ctrl_idx < 2; ctrl_idx++) { + isci_orom->ctrl[ctrl_idx].controller.mode_type = mode_type; + isci_orom->ctrl[ctrl_idx].controller.max_concurrent_dev_spin_up = + max_num_concurrent_dev_spin_up; + isci_orom->ctrl[ctrl_idx].controller.do_enable_ssc = + enable_ssc; + + for (port_idx = 0; port_idx < 4; port_idx++) + isci_orom->ctrl[ctrl_idx].ports[port_idx].phy_mask = + phy_mask[ctrl_idx][port_idx]; + + for (phy_idx = 0; phy_idx < 4; phy_idx++) { + isci_orom->ctrl[ctrl_idx].phys[phy_idx].sas_address.high = + (__u32)(sas_addr[ctrl_idx][phy_idx] >> 32); + isci_orom->ctrl[ctrl_idx].phys[phy_idx].sas_address.low = + (__u32)(sas_addr[ctrl_idx][phy_idx]); + + isci_orom->ctrl[ctrl_idx].phys[phy_idx].afe_tx_amp_control0 = + afe_tx_amp_control0; + isci_orom->ctrl[ctrl_idx].phys[phy_idx].afe_tx_amp_control1 = + afe_tx_amp_control1; + isci_orom->ctrl[ctrl_idx].phys[phy_idx].afe_tx_amp_control2 = + afe_tx_amp_control2; + isci_orom->ctrl[ctrl_idx].phys[phy_idx].afe_tx_amp_control3 = + afe_tx_amp_control3; + } + } +} + +int main(void) +{ + int err; + struct isci_orom *isci_orom; + + isci_orom = malloc(sizeof(struct isci_orom)); + memset(isci_orom, 0, sizeof(struct isci_orom)); + + set_binary_values(isci_orom); + + err = write_blob(isci_orom); + if (err < 0) { + free(isci_orom); + return err; + } + + free(isci_orom); + return 0; +} diff --git a/drivers/scsi/isci/firmware/create_fw.h b/drivers/scsi/isci/firmware/create_fw.h new file mode 100644 index 000000000000..5f298828d22e --- /dev/null +++ b/drivers/scsi/isci/firmware/create_fw.h @@ -0,0 +1,77 @@ +#ifndef _CREATE_FW_H_ +#define _CREATE_FW_H_ +#include "../probe_roms.h" + + +/* we are configuring for 2 SCUs */ +static const int num_elements = 2; + +/* + * For all defined arrays: + * elements 0-3 are for SCU0, ports 0-3 + * elements 4-7 are for SCU1, ports 0-3 + * + * valid configurations for one SCU are: + * P0 P1 P2 P3 + * ---------------- + * 0xF,0x0,0x0,0x0 # 1 x4 port + * 0x3,0x0,0x4,0x8 # Phys 0 and 1 are a x2 port, phy 2 and phy 3 are each x1 + * # ports + * 0x1,0x2,0xC,0x0 # Phys 0 and 1 are each x1 ports, phy 2 and phy 3 are a x2 + * # port + * 0x3,0x0,0xC,0x0 # Phys 0 and 1 are a x2 port, phy 2 and phy 3 are a x2 port + * 0x1,0x2,0x4,0x8 # Each phy is a x1 port (this is the default configuration) + * + * if there is a port/phy on which you do not wish to override the default + * values, use the value assigned to UNINIT_PARAM (255). + */ + +/* discovery mode type (port auto config mode by default ) */ + +/* + * if there is a port/phy on which you do not wish to override the default + * values, use the value "0000000000000000". SAS address of zero's is + * considered invalid and will not be used. + */ +#ifdef MPC +static const int mode_type = SCIC_PORT_MANUAL_CONFIGURATION_MODE; +static const __u8 phy_mask[2][4] = { {1, 2, 4, 8}, + {1, 2, 4, 8} }; +static const unsigned long long sas_addr[2][4] = { { 0x5FCFFFFFF0000001ULL, + 0x5FCFFFFFF0000002ULL, + 0x5FCFFFFFF0000003ULL, + 0x5FCFFFFFF0000004ULL }, + { 0x5FCFFFFFF0000005ULL, + 0x5FCFFFFFF0000006ULL, + 0x5FCFFFFFF0000007ULL, + 0x5FCFFFFFF0000008ULL } }; +#else /* APC (default) */ +static const int mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE; +static const __u8 phy_mask[2][4]; +static const unsigned long long sas_addr[2][4] = { { 0x5FCFFFFF00000001ULL, + 0x5FCFFFFF00000001ULL, + 0x5FCFFFFF00000001ULL, + 0x5FCFFFFF00000001ULL }, + { 0x5FCFFFFF00000002ULL, + 0x5FCFFFFF00000002ULL, + 0x5FCFFFFF00000002ULL, + 0x5FCFFFFF00000002ULL } }; +#endif + +/* Maximum number of concurrent device spin up */ +static const int max_num_concurrent_dev_spin_up = 1; + +/* enable of ssc operation */ +static const int enable_ssc; + +/* AFE_TX_AMP_CONTROL */ +static const unsigned int afe_tx_amp_control0 = 0x000bdd08; +static const unsigned int afe_tx_amp_control1 = 0x000ffc00; +static const unsigned int afe_tx_amp_control2 = 0x000b7c09; +static const unsigned int afe_tx_amp_control3 = 0x000afc6e; + +static const char blob_name[] = "isci_firmware.bin"; +static const char sig[] = "ISCUOEMB"; +static const unsigned char version = 0x10; + +#endif diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c new file mode 100644 index 000000000000..26072f1e9852 --- /dev/null +++ b/drivers/scsi/isci/host.c @@ -0,0 +1,2751 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include <linux/circ_buf.h> +#include <linux/device.h> +#include <scsi/sas.h> +#include "host.h" +#include "isci.h" +#include "port.h" +#include "host.h" +#include "probe_roms.h" +#include "remote_device.h" +#include "request.h" +#include "scu_completion_codes.h" +#include "scu_event_codes.h" +#include "registers.h" +#include "scu_remote_node_context.h" +#include "scu_task_context.h" + +#define SCU_CONTEXT_RAM_INIT_STALL_TIME 200 + +#define smu_max_ports(dcc_value) \ + (\ + (((dcc_value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_MASK) \ + >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_SHIFT) + 1 \ + ) + +#define smu_max_task_contexts(dcc_value) \ + (\ + (((dcc_value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_MASK) \ + >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_SHIFT) + 1 \ + ) + +#define smu_max_rncs(dcc_value) \ + (\ + (((dcc_value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_MASK) \ + >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_SHIFT) + 1 \ + ) + +#define SCIC_SDS_CONTROLLER_PHY_START_TIMEOUT 100 + +/** + * + * + * The number of milliseconds to wait while a given phy is consuming power + * before allowing another set of phys to consume power. Ultimately, this will + * be specified by OEM parameter. + */ +#define SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL 500 + +/** + * NORMALIZE_PUT_POINTER() - + * + * This macro will normalize the completion queue put pointer so its value can + * be used as an array inde + */ +#define NORMALIZE_PUT_POINTER(x) \ + ((x) & SMU_COMPLETION_QUEUE_PUT_POINTER_MASK) + + +/** + * NORMALIZE_EVENT_POINTER() - + * + * This macro will normalize the completion queue event entry so its value can + * be used as an index. + */ +#define NORMALIZE_EVENT_POINTER(x) \ + (\ + ((x) & SMU_COMPLETION_QUEUE_GET_EVENT_POINTER_MASK) \ + >> SMU_COMPLETION_QUEUE_GET_EVENT_POINTER_SHIFT \ + ) + +/** + * NORMALIZE_GET_POINTER() - + * + * This macro will normalize the completion queue get pointer so its value can + * be used as an index into an array + */ +#define NORMALIZE_GET_POINTER(x) \ + ((x) & SMU_COMPLETION_QUEUE_GET_POINTER_MASK) + +/** + * NORMALIZE_GET_POINTER_CYCLE_BIT() - + * + * This macro will normalize the completion queue cycle pointer so it matches + * the completion queue cycle bit + */ +#define NORMALIZE_GET_POINTER_CYCLE_BIT(x) \ + ((SMU_CQGR_CYCLE_BIT & (x)) << (31 - SMU_COMPLETION_QUEUE_GET_CYCLE_BIT_SHIFT)) + +/** + * COMPLETION_QUEUE_CYCLE_BIT() - + * + * This macro will return the cycle bit of the completion queue entry + */ +#define COMPLETION_QUEUE_CYCLE_BIT(x) ((x) & 0x80000000) + +/* Init the state machine and call the state entry function (if any) */ +void sci_init_sm(struct sci_base_state_machine *sm, + const struct sci_base_state *state_table, u32 initial_state) +{ + sci_state_transition_t handler; + + sm->initial_state_id = initial_state; + sm->previous_state_id = initial_state; + sm->current_state_id = initial_state; + sm->state_table = state_table; + + handler = sm->state_table[initial_state].enter_state; + if (handler) + handler(sm); +} + +/* Call the state exit fn, update the current state, call the state entry fn */ +void sci_change_state(struct sci_base_state_machine *sm, u32 next_state) +{ + sci_state_transition_t handler; + + handler = sm->state_table[sm->current_state_id].exit_state; + if (handler) + handler(sm); + + sm->previous_state_id = sm->current_state_id; + sm->current_state_id = next_state; + + handler = sm->state_table[sm->current_state_id].enter_state; + if (handler) + handler(sm); +} + +static bool sci_controller_completion_queue_has_entries(struct isci_host *ihost) +{ + u32 get_value = ihost->completion_queue_get; + u32 get_index = get_value & SMU_COMPLETION_QUEUE_GET_POINTER_MASK; + + if (NORMALIZE_GET_POINTER_CYCLE_BIT(get_value) == + COMPLETION_QUEUE_CYCLE_BIT(ihost->completion_queue[get_index])) + return true; + + return false; +} + +static bool sci_controller_isr(struct isci_host *ihost) +{ + if (sci_controller_completion_queue_has_entries(ihost)) { + return true; + } else { + /* + * we have a spurious interrupt it could be that we have already + * emptied the completion queue from a previous interrupt */ + writel(SMU_ISR_COMPLETION, &ihost->smu_registers->interrupt_status); + + /* + * There is a race in the hardware that could cause us not to be notified + * of an interrupt completion if we do not take this step. We will mask + * then unmask the interrupts so if there is another interrupt pending + * the clearing of the interrupt source we get the next interrupt message. */ + writel(0xFF000000, &ihost->smu_registers->interrupt_mask); + writel(0, &ihost->smu_registers->interrupt_mask); + } + + return false; +} + +irqreturn_t isci_msix_isr(int vec, void *data) +{ + struct isci_host *ihost = data; + + if (sci_controller_isr(ihost)) + tasklet_schedule(&ihost->completion_tasklet); + + return IRQ_HANDLED; +} + +static bool sci_controller_error_isr(struct isci_host *ihost) +{ + u32 interrupt_status; + + interrupt_status = + readl(&ihost->smu_registers->interrupt_status); + interrupt_status &= (SMU_ISR_QUEUE_ERROR | SMU_ISR_QUEUE_SUSPEND); + + if (interrupt_status != 0) { + /* + * There is an error interrupt pending so let it through and handle + * in the callback */ + return true; + } + + /* + * There is a race in the hardware that could cause us not to be notified + * of an interrupt completion if we do not take this step. We will mask + * then unmask the error interrupts so if there was another interrupt + * pending we will be notified. + * Could we write the value of (SMU_ISR_QUEUE_ERROR | SMU_ISR_QUEUE_SUSPEND)? */ + writel(0xff, &ihost->smu_registers->interrupt_mask); + writel(0, &ihost->smu_registers->interrupt_mask); + + return false; +} + +static void sci_controller_task_completion(struct isci_host *ihost, u32 ent) +{ + u32 index = SCU_GET_COMPLETION_INDEX(ent); + struct isci_request *ireq = ihost->reqs[index]; + + /* Make sure that we really want to process this IO request */ + if (test_bit(IREQ_ACTIVE, &ireq->flags) && + ireq->io_tag != SCI_CONTROLLER_INVALID_IO_TAG && + ISCI_TAG_SEQ(ireq->io_tag) == ihost->io_request_sequence[index]) + /* Yep this is a valid io request pass it along to the + * io request handler + */ + sci_io_request_tc_completion(ireq, ent); +} + +static void sci_controller_sdma_completion(struct isci_host *ihost, u32 ent) +{ + u32 index; + struct isci_request *ireq; + struct isci_remote_device *idev; + + index = SCU_GET_COMPLETION_INDEX(ent); + + switch (scu_get_command_request_type(ent)) { + case SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC: + case SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_TC: + ireq = ihost->reqs[index]; + dev_warn(&ihost->pdev->dev, "%s: %x for io request %p\n", + __func__, ent, ireq); + /* @todo For a post TC operation we need to fail the IO + * request + */ + break; + case SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC: + case SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC: + case SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC: + idev = ihost->device_table[index]; + dev_warn(&ihost->pdev->dev, "%s: %x for device %p\n", + __func__, ent, idev); + /* @todo For a port RNC operation we need to fail the + * device + */ + break; + default: + dev_warn(&ihost->pdev->dev, "%s: unknown completion type %x\n", + __func__, ent); + break; + } +} + +static void sci_controller_unsolicited_frame(struct isci_host *ihost, u32 ent) +{ + u32 index; + u32 frame_index; + + struct scu_unsolicited_frame_header *frame_header; + struct isci_phy *iphy; + struct isci_remote_device *idev; + + enum sci_status result = SCI_FAILURE; + + frame_index = SCU_GET_FRAME_INDEX(ent); + + frame_header = ihost->uf_control.buffers.array[frame_index].header; + ihost->uf_control.buffers.array[frame_index].state = UNSOLICITED_FRAME_IN_USE; + + if (SCU_GET_FRAME_ERROR(ent)) { + /* + * / @todo If the IAF frame or SIGNATURE FIS frame has an error will + * / this cause a problem? We expect the phy initialization will + * / fail if there is an error in the frame. */ + sci_controller_release_frame(ihost, frame_index); + return; + } + + if (frame_header->is_address_frame) { + index = SCU_GET_PROTOCOL_ENGINE_INDEX(ent); + iphy = &ihost->phys[index]; + result = sci_phy_frame_handler(iphy, frame_index); + } else { + + index = SCU_GET_COMPLETION_INDEX(ent); + + if (index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) { + /* + * This is a signature fis or a frame from a direct attached SATA + * device that has not yet been created. In either case forwared + * the frame to the PE and let it take care of the frame data. */ + index = SCU_GET_PROTOCOL_ENGINE_INDEX(ent); + iphy = &ihost->phys[index]; + result = sci_phy_frame_handler(iphy, frame_index); + } else { + if (index < ihost->remote_node_entries) + idev = ihost->device_table[index]; + else + idev = NULL; + + if (idev != NULL) + result = sci_remote_device_frame_handler(idev, frame_index); + else + sci_controller_release_frame(ihost, frame_index); + } + } + + if (result != SCI_SUCCESS) { + /* + * / @todo Is there any reason to report some additional error message + * / when we get this failure notifiction? */ + } +} + +static void sci_controller_event_completion(struct isci_host *ihost, u32 ent) +{ + struct isci_remote_device *idev; + struct isci_request *ireq; + struct isci_phy *iphy; + u32 index; + + index = SCU_GET_COMPLETION_INDEX(ent); + + switch (scu_get_event_type(ent)) { + case SCU_EVENT_TYPE_SMU_COMMAND_ERROR: + /* / @todo The driver did something wrong and we need to fix the condtion. */ + dev_err(&ihost->pdev->dev, + "%s: SCIC Controller 0x%p received SMU command error " + "0x%x\n", + __func__, + ihost, + ent); + break; + + case SCU_EVENT_TYPE_SMU_PCQ_ERROR: + case SCU_EVENT_TYPE_SMU_ERROR: + case SCU_EVENT_TYPE_FATAL_MEMORY_ERROR: + /* + * / @todo This is a hardware failure and its likely that we want to + * / reset the controller. */ + dev_err(&ihost->pdev->dev, + "%s: SCIC Controller 0x%p received fatal controller " + "event 0x%x\n", + __func__, + ihost, + ent); + break; + + case SCU_EVENT_TYPE_TRANSPORT_ERROR: + ireq = ihost->reqs[index]; + sci_io_request_event_handler(ireq, ent); + break; + + case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT: + switch (scu_get_event_specifier(ent)) { + case SCU_EVENT_SPECIFIC_SMP_RESPONSE_NO_PE: + case SCU_EVENT_SPECIFIC_TASK_TIMEOUT: + ireq = ihost->reqs[index]; + if (ireq != NULL) + sci_io_request_event_handler(ireq, ent); + else + dev_warn(&ihost->pdev->dev, + "%s: SCIC Controller 0x%p received " + "event 0x%x for io request object " + "that doesnt exist.\n", + __func__, + ihost, + ent); + + break; + + case SCU_EVENT_SPECIFIC_IT_NEXUS_TIMEOUT: + idev = ihost->device_table[index]; + if (idev != NULL) + sci_remote_device_event_handler(idev, ent); + else + dev_warn(&ihost->pdev->dev, + "%s: SCIC Controller 0x%p received " + "event 0x%x for remote device object " + "that doesnt exist.\n", + __func__, + ihost, + ent); + + break; + } + break; + + case SCU_EVENT_TYPE_BROADCAST_CHANGE: + /* + * direct the broadcast change event to the phy first and then let + * the phy redirect the broadcast change to the port object */ + case SCU_EVENT_TYPE_ERR_CNT_EVENT: + /* + * direct error counter event to the phy object since that is where + * we get the event notification. This is a type 4 event. */ + case SCU_EVENT_TYPE_OSSP_EVENT: + index = SCU_GET_PROTOCOL_ENGINE_INDEX(ent); + iphy = &ihost->phys[index]; + sci_phy_event_handler(iphy, ent); + break; + + case SCU_EVENT_TYPE_RNC_SUSPEND_TX: + case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: + case SCU_EVENT_TYPE_RNC_OPS_MISC: + if (index < ihost->remote_node_entries) { + idev = ihost->device_table[index]; + + if (idev != NULL) + sci_remote_device_event_handler(idev, ent); + } else + dev_err(&ihost->pdev->dev, + "%s: SCIC Controller 0x%p received event 0x%x " + "for remote device object 0x%0x that doesnt " + "exist.\n", + __func__, + ihost, + ent, + index); + + break; + + default: + dev_warn(&ihost->pdev->dev, + "%s: SCIC Controller received unknown event code %x\n", + __func__, + ent); + break; + } +} + +static void sci_controller_process_completions(struct isci_host *ihost) +{ + u32 completion_count = 0; + u32 ent; + u32 get_index; + u32 get_cycle; + u32 event_get; + u32 event_cycle; + + dev_dbg(&ihost->pdev->dev, + "%s: completion queue begining get:0x%08x\n", + __func__, + ihost->completion_queue_get); + + /* Get the component parts of the completion queue */ + get_index = NORMALIZE_GET_POINTER(ihost->completion_queue_get); + get_cycle = SMU_CQGR_CYCLE_BIT & ihost->completion_queue_get; + + event_get = NORMALIZE_EVENT_POINTER(ihost->completion_queue_get); + event_cycle = SMU_CQGR_EVENT_CYCLE_BIT & ihost->completion_queue_get; + + while ( + NORMALIZE_GET_POINTER_CYCLE_BIT(get_cycle) + == COMPLETION_QUEUE_CYCLE_BIT(ihost->completion_queue[get_index]) + ) { + completion_count++; + + ent = ihost->completion_queue[get_index]; + + /* increment the get pointer and check for rollover to toggle the cycle bit */ + get_cycle ^= ((get_index+1) & SCU_MAX_COMPLETION_QUEUE_ENTRIES) << + (SMU_COMPLETION_QUEUE_GET_CYCLE_BIT_SHIFT - SCU_MAX_COMPLETION_QUEUE_SHIFT); + get_index = (get_index+1) & (SCU_MAX_COMPLETION_QUEUE_ENTRIES-1); + + dev_dbg(&ihost->pdev->dev, + "%s: completion queue entry:0x%08x\n", + __func__, + ent); + + switch (SCU_GET_COMPLETION_TYPE(ent)) { + case SCU_COMPLETION_TYPE_TASK: + sci_controller_task_completion(ihost, ent); + break; + + case SCU_COMPLETION_TYPE_SDMA: + sci_controller_sdma_completion(ihost, ent); + break; + + case SCU_COMPLETION_TYPE_UFI: + sci_controller_unsolicited_frame(ihost, ent); + break; + + case SCU_COMPLETION_TYPE_EVENT: + case SCU_COMPLETION_TYPE_NOTIFY: { + event_cycle ^= ((event_get+1) & SCU_MAX_EVENTS) << + (SMU_COMPLETION_QUEUE_GET_EVENT_CYCLE_BIT_SHIFT - SCU_MAX_EVENTS_SHIFT); + event_get = (event_get+1) & (SCU_MAX_EVENTS-1); + + sci_controller_event_completion(ihost, ent); + break; + } + default: + dev_warn(&ihost->pdev->dev, + "%s: SCIC Controller received unknown " + "completion type %x\n", + __func__, + ent); + break; + } + } + + /* Update the get register if we completed one or more entries */ + if (completion_count > 0) { + ihost->completion_queue_get = + SMU_CQGR_GEN_BIT(ENABLE) | + SMU_CQGR_GEN_BIT(EVENT_ENABLE) | + event_cycle | + SMU_CQGR_GEN_VAL(EVENT_POINTER, event_get) | + get_cycle | + SMU_CQGR_GEN_VAL(POINTER, get_index); + + writel(ihost->completion_queue_get, + &ihost->smu_registers->completion_queue_get); + + } + + dev_dbg(&ihost->pdev->dev, + "%s: completion queue ending get:0x%08x\n", + __func__, + ihost->completion_queue_get); + +} + +static void sci_controller_error_handler(struct isci_host *ihost) +{ + u32 interrupt_status; + + interrupt_status = + readl(&ihost->smu_registers->interrupt_status); + + if ((interrupt_status & SMU_ISR_QUEUE_SUSPEND) && + sci_controller_completion_queue_has_entries(ihost)) { + + sci_controller_process_completions(ihost); + writel(SMU_ISR_QUEUE_SUSPEND, &ihost->smu_registers->interrupt_status); + } else { + dev_err(&ihost->pdev->dev, "%s: status: %#x\n", __func__, + interrupt_status); + + sci_change_state(&ihost->sm, SCIC_FAILED); + + return; + } + + /* If we dont process any completions I am not sure that we want to do this. + * We are in the middle of a hardware fault and should probably be reset. + */ + writel(0, &ihost->smu_registers->interrupt_mask); +} + +irqreturn_t isci_intx_isr(int vec, void *data) +{ + irqreturn_t ret = IRQ_NONE; + struct isci_host *ihost = data; + + if (sci_controller_isr(ihost)) { + writel(SMU_ISR_COMPLETION, &ihost->smu_registers->interrupt_status); + tasklet_schedule(&ihost->completion_tasklet); + ret = IRQ_HANDLED; + } else if (sci_controller_error_isr(ihost)) { + spin_lock(&ihost->scic_lock); + sci_controller_error_handler(ihost); + spin_unlock(&ihost->scic_lock); + ret = IRQ_HANDLED; + } + + return ret; +} + +irqreturn_t isci_error_isr(int vec, void *data) +{ + struct isci_host *ihost = data; + + if (sci_controller_error_isr(ihost)) + sci_controller_error_handler(ihost); + + return IRQ_HANDLED; +} + +/** + * isci_host_start_complete() - This function is called by the core library, + * through the ISCI Module, to indicate controller start status. + * @isci_host: This parameter specifies the ISCI host object + * @completion_status: This parameter specifies the completion status from the + * core library. + * + */ +static void isci_host_start_complete(struct isci_host *ihost, enum sci_status completion_status) +{ + if (completion_status != SCI_SUCCESS) + dev_info(&ihost->pdev->dev, + "controller start timed out, continuing...\n"); + isci_host_change_state(ihost, isci_ready); + clear_bit(IHOST_START_PENDING, &ihost->flags); + wake_up(&ihost->eventq); +} + +int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time) +{ + struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha; + + if (test_bit(IHOST_START_PENDING, &ihost->flags)) + return 0; + + /* todo: use sas_flush_discovery once it is upstream */ + scsi_flush_work(shost); + + scsi_flush_work(shost); + + dev_dbg(&ihost->pdev->dev, + "%s: ihost->status = %d, time = %ld\n", + __func__, isci_host_get_state(ihost), time); + + return 1; + +} + +/** + * sci_controller_get_suggested_start_timeout() - This method returns the + * suggested sci_controller_start() timeout amount. The user is free to + * use any timeout value, but this method provides the suggested minimum + * start timeout value. The returned value is based upon empirical + * information determined as a result of interoperability testing. + * @controller: the handle to the controller object for which to return the + * suggested start timeout. + * + * This method returns the number of milliseconds for the suggested start + * operation timeout. + */ +static u32 sci_controller_get_suggested_start_timeout(struct isci_host *ihost) +{ + /* Validate the user supplied parameters. */ + if (!ihost) + return 0; + + /* + * The suggested minimum timeout value for a controller start operation: + * + * Signature FIS Timeout + * + Phy Start Timeout + * + Number of Phy Spin Up Intervals + * --------------------------------- + * Number of milliseconds for the controller start operation. + * + * NOTE: The number of phy spin up intervals will be equivalent + * to the number of phys divided by the number phys allowed + * per interval - 1 (once OEM parameters are supported). + * Currently we assume only 1 phy per interval. */ + + return SCIC_SDS_SIGNATURE_FIS_TIMEOUT + + SCIC_SDS_CONTROLLER_PHY_START_TIMEOUT + + ((SCI_MAX_PHYS - 1) * SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL); +} + +static void sci_controller_enable_interrupts(struct isci_host *ihost) +{ + BUG_ON(ihost->smu_registers == NULL); + writel(0, &ihost->smu_registers->interrupt_mask); +} + +void sci_controller_disable_interrupts(struct isci_host *ihost) +{ + BUG_ON(ihost->smu_registers == NULL); + writel(0xffffffff, &ihost->smu_registers->interrupt_mask); +} + +static void sci_controller_enable_port_task_scheduler(struct isci_host *ihost) +{ + u32 port_task_scheduler_value; + + port_task_scheduler_value = + readl(&ihost->scu_registers->peg0.ptsg.control); + port_task_scheduler_value |= + (SCU_PTSGCR_GEN_BIT(ETM_ENABLE) | + SCU_PTSGCR_GEN_BIT(PTSG_ENABLE)); + writel(port_task_scheduler_value, + &ihost->scu_registers->peg0.ptsg.control); +} + +static void sci_controller_assign_task_entries(struct isci_host *ihost) +{ + u32 task_assignment; + + /* + * Assign all the TCs to function 0 + * TODO: Do we actually need to read this register to write it back? + */ + + task_assignment = + readl(&ihost->smu_registers->task_context_assignment[0]); + + task_assignment |= (SMU_TCA_GEN_VAL(STARTING, 0)) | + (SMU_TCA_GEN_VAL(ENDING, ihost->task_context_entries - 1)) | + (SMU_TCA_GEN_BIT(RANGE_CHECK_ENABLE)); + + writel(task_assignment, + &ihost->smu_registers->task_context_assignment[0]); + +} + +static void sci_controller_initialize_completion_queue(struct isci_host *ihost) +{ + u32 index; + u32 completion_queue_control_value; + u32 completion_queue_get_value; + u32 completion_queue_put_value; + + ihost->completion_queue_get = 0; + + completion_queue_control_value = + (SMU_CQC_QUEUE_LIMIT_SET(SCU_MAX_COMPLETION_QUEUE_ENTRIES - 1) | + SMU_CQC_EVENT_LIMIT_SET(SCU_MAX_EVENTS - 1)); + + writel(completion_queue_control_value, + &ihost->smu_registers->completion_queue_control); + + + /* Set the completion queue get pointer and enable the queue */ + completion_queue_get_value = ( + (SMU_CQGR_GEN_VAL(POINTER, 0)) + | (SMU_CQGR_GEN_VAL(EVENT_POINTER, 0)) + | (SMU_CQGR_GEN_BIT(ENABLE)) + | (SMU_CQGR_GEN_BIT(EVENT_ENABLE)) + ); + + writel(completion_queue_get_value, + &ihost->smu_registers->completion_queue_get); + + /* Set the completion queue put pointer */ + completion_queue_put_value = ( + (SMU_CQPR_GEN_VAL(POINTER, 0)) + | (SMU_CQPR_GEN_VAL(EVENT_POINTER, 0)) + ); + + writel(completion_queue_put_value, + &ihost->smu_registers->completion_queue_put); + + /* Initialize the cycle bit of the completion queue entries */ + for (index = 0; index < SCU_MAX_COMPLETION_QUEUE_ENTRIES; index++) { + /* + * If get.cycle_bit != completion_queue.cycle_bit + * its not a valid completion queue entry + * so at system start all entries are invalid */ + ihost->completion_queue[index] = 0x80000000; + } +} + +static void sci_controller_initialize_unsolicited_frame_queue(struct isci_host *ihost) +{ + u32 frame_queue_control_value; + u32 frame_queue_get_value; + u32 frame_queue_put_value; + + /* Write the queue size */ + frame_queue_control_value = + SCU_UFQC_GEN_VAL(QUEUE_SIZE, SCU_MAX_UNSOLICITED_FRAMES); + + writel(frame_queue_control_value, + &ihost->scu_registers->sdma.unsolicited_frame_queue_control); + + /* Setup the get pointer for the unsolicited frame queue */ + frame_queue_get_value = ( + SCU_UFQGP_GEN_VAL(POINTER, 0) + | SCU_UFQGP_GEN_BIT(ENABLE_BIT) + ); + + writel(frame_queue_get_value, + &ihost->scu_registers->sdma.unsolicited_frame_get_pointer); + /* Setup the put pointer for the unsolicited frame queue */ + frame_queue_put_value = SCU_UFQPP_GEN_VAL(POINTER, 0); + writel(frame_queue_put_value, + &ihost->scu_registers->sdma.unsolicited_frame_put_pointer); +} + +static void sci_controller_transition_to_ready(struct isci_host *ihost, enum sci_status status) +{ + if (ihost->sm.current_state_id == SCIC_STARTING) { + /* + * We move into the ready state, because some of the phys/ports + * may be up and operational. + */ + sci_change_state(&ihost->sm, SCIC_READY); + + isci_host_start_complete(ihost, status); + } +} + +static bool is_phy_starting(struct isci_phy *iphy) +{ + enum sci_phy_states state; + + state = iphy->sm.current_state_id; + switch (state) { + case SCI_PHY_STARTING: + case SCI_PHY_SUB_INITIAL: + case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN: + case SCI_PHY_SUB_AWAIT_IAF_UF: + case SCI_PHY_SUB_AWAIT_SAS_POWER: + case SCI_PHY_SUB_AWAIT_SATA_POWER: + case SCI_PHY_SUB_AWAIT_SATA_PHY_EN: + case SCI_PHY_SUB_AWAIT_SATA_SPEED_EN: + case SCI_PHY_SUB_AWAIT_SIG_FIS_UF: + case SCI_PHY_SUB_FINAL: + return true; + default: + return false; + } +} + +/** + * sci_controller_start_next_phy - start phy + * @scic: controller + * + * If all the phys have been started, then attempt to transition the + * controller to the READY state and inform the user + * (sci_cb_controller_start_complete()). + */ +static enum sci_status sci_controller_start_next_phy(struct isci_host *ihost) +{ + struct sci_oem_params *oem = &ihost->oem_parameters; + struct isci_phy *iphy; + enum sci_status status; + + status = SCI_SUCCESS; + + if (ihost->phy_startup_timer_pending) + return status; + + if (ihost->next_phy_to_start >= SCI_MAX_PHYS) { + bool is_controller_start_complete = true; + u32 state; + u8 index; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + iphy = &ihost->phys[index]; + state = iphy->sm.current_state_id; + + if (!phy_get_non_dummy_port(iphy)) + continue; + + /* The controller start operation is complete iff: + * - all links have been given an opportunity to start + * - have no indication of a connected device + * - have an indication of a connected device and it has + * finished the link training process. + */ + if ((iphy->is_in_link_training == false && state == SCI_PHY_INITIAL) || + (iphy->is_in_link_training == false && state == SCI_PHY_STOPPED) || + (iphy->is_in_link_training == true && is_phy_starting(iphy))) { + is_controller_start_complete = false; + break; + } + } + + /* + * The controller has successfully finished the start process. + * Inform the SCI Core user and transition to the READY state. */ + if (is_controller_start_complete == true) { + sci_controller_transition_to_ready(ihost, SCI_SUCCESS); + sci_del_timer(&ihost->phy_timer); + ihost->phy_startup_timer_pending = false; + } + } else { + iphy = &ihost->phys[ihost->next_phy_to_start]; + + if (oem->controller.mode_type == SCIC_PORT_MANUAL_CONFIGURATION_MODE) { + if (phy_get_non_dummy_port(iphy) == NULL) { + ihost->next_phy_to_start++; + + /* Caution recursion ahead be forwarned + * + * The PHY was never added to a PORT in MPC mode + * so start the next phy in sequence This phy + * will never go link up and will not draw power + * the OEM parameters either configured the phy + * incorrectly for the PORT or it was never + * assigned to a PORT + */ + return sci_controller_start_next_phy(ihost); + } + } + + status = sci_phy_start(iphy); + + if (status == SCI_SUCCESS) { + sci_mod_timer(&ihost->phy_timer, + SCIC_SDS_CONTROLLER_PHY_START_TIMEOUT); + ihost->phy_startup_timer_pending = true; + } else { + dev_warn(&ihost->pdev->dev, + "%s: Controller stop operation failed " + "to stop phy %d because of status " + "%d.\n", + __func__, + ihost->phys[ihost->next_phy_to_start].phy_index, + status); + } + + ihost->next_phy_to_start++; + } + + return status; +} + +static void phy_startup_timeout(unsigned long data) +{ + struct sci_timer *tmr = (struct sci_timer *)data; + struct isci_host *ihost = container_of(tmr, typeof(*ihost), phy_timer); + unsigned long flags; + enum sci_status status; + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmr->cancel) + goto done; + + ihost->phy_startup_timer_pending = false; + + do { + status = sci_controller_start_next_phy(ihost); + } while (status != SCI_SUCCESS); + +done: + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +static u16 isci_tci_active(struct isci_host *ihost) +{ + return CIRC_CNT(ihost->tci_head, ihost->tci_tail, SCI_MAX_IO_REQUESTS); +} + +static enum sci_status sci_controller_start(struct isci_host *ihost, + u32 timeout) +{ + enum sci_status result; + u16 index; + + if (ihost->sm.current_state_id != SCIC_INITIALIZED) { + dev_warn(&ihost->pdev->dev, + "SCIC Controller start operation requested in " + "invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } + + /* Build the TCi free pool */ + BUILD_BUG_ON(SCI_MAX_IO_REQUESTS > 1 << sizeof(ihost->tci_pool[0]) * 8); + ihost->tci_head = 0; + ihost->tci_tail = 0; + for (index = 0; index < ihost->task_context_entries; index++) + isci_tci_free(ihost, index); + + /* Build the RNi free pool */ + sci_remote_node_table_initialize(&ihost->available_remote_nodes, + ihost->remote_node_entries); + + /* + * Before anything else lets make sure we will not be + * interrupted by the hardware. + */ + sci_controller_disable_interrupts(ihost); + + /* Enable the port task scheduler */ + sci_controller_enable_port_task_scheduler(ihost); + + /* Assign all the task entries to ihost physical function */ + sci_controller_assign_task_entries(ihost); + + /* Now initialize the completion queue */ + sci_controller_initialize_completion_queue(ihost); + + /* Initialize the unsolicited frame queue for use */ + sci_controller_initialize_unsolicited_frame_queue(ihost); + + /* Start all of the ports on this controller */ + for (index = 0; index < ihost->logical_port_entries; index++) { + struct isci_port *iport = &ihost->ports[index]; + + result = sci_port_start(iport); + if (result) + return result; + } + + sci_controller_start_next_phy(ihost); + + sci_mod_timer(&ihost->timer, timeout); + + sci_change_state(&ihost->sm, SCIC_STARTING); + + return SCI_SUCCESS; +} + +void isci_host_scan_start(struct Scsi_Host *shost) +{ + struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha; + unsigned long tmo = sci_controller_get_suggested_start_timeout(ihost); + + set_bit(IHOST_START_PENDING, &ihost->flags); + + spin_lock_irq(&ihost->scic_lock); + sci_controller_start(ihost, tmo); + sci_controller_enable_interrupts(ihost); + spin_unlock_irq(&ihost->scic_lock); +} + +static void isci_host_stop_complete(struct isci_host *ihost, enum sci_status completion_status) +{ + isci_host_change_state(ihost, isci_stopped); + sci_controller_disable_interrupts(ihost); + clear_bit(IHOST_STOP_PENDING, &ihost->flags); + wake_up(&ihost->eventq); +} + +static void sci_controller_completion_handler(struct isci_host *ihost) +{ + /* Empty out the completion queue */ + if (sci_controller_completion_queue_has_entries(ihost)) + sci_controller_process_completions(ihost); + + /* Clear the interrupt and enable all interrupts again */ + writel(SMU_ISR_COMPLETION, &ihost->smu_registers->interrupt_status); + /* Could we write the value of SMU_ISR_COMPLETION? */ + writel(0xFF000000, &ihost->smu_registers->interrupt_mask); + writel(0, &ihost->smu_registers->interrupt_mask); +} + +/** + * isci_host_completion_routine() - This function is the delayed service + * routine that calls the sci core library's completion handler. It's + * scheduled as a tasklet from the interrupt service routine when interrupts + * in use, or set as the timeout function in polled mode. + * @data: This parameter specifies the ISCI host object + * + */ +static void isci_host_completion_routine(unsigned long data) +{ + struct isci_host *ihost = (struct isci_host *)data; + struct list_head completed_request_list; + struct list_head errored_request_list; + struct list_head *current_position; + struct list_head *next_position; + struct isci_request *request; + struct isci_request *next_request; + struct sas_task *task; + + INIT_LIST_HEAD(&completed_request_list); + INIT_LIST_HEAD(&errored_request_list); + + spin_lock_irq(&ihost->scic_lock); + + sci_controller_completion_handler(ihost); + + /* Take the lists of completed I/Os from the host. */ + + list_splice_init(&ihost->requests_to_complete, + &completed_request_list); + + /* Take the list of errored I/Os from the host. */ + list_splice_init(&ihost->requests_to_errorback, + &errored_request_list); + + spin_unlock_irq(&ihost->scic_lock); + + /* Process any completions in the lists. */ + list_for_each_safe(current_position, next_position, + &completed_request_list) { + + request = list_entry(current_position, struct isci_request, + completed_node); + task = isci_request_access_task(request); + + /* Normal notification (task_done) */ + dev_dbg(&ihost->pdev->dev, + "%s: Normal - request/task = %p/%p\n", + __func__, + request, + task); + + /* Return the task to libsas */ + if (task != NULL) { + + task->lldd_task = NULL; + if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + + /* If the task is already in the abort path, + * the task_done callback cannot be called. + */ + task->task_done(task); + } + } + + spin_lock_irq(&ihost->scic_lock); + isci_free_tag(ihost, request->io_tag); + spin_unlock_irq(&ihost->scic_lock); + } + list_for_each_entry_safe(request, next_request, &errored_request_list, + completed_node) { + + task = isci_request_access_task(request); + + /* Use sas_task_abort */ + dev_warn(&ihost->pdev->dev, + "%s: Error - request/task = %p/%p\n", + __func__, + request, + task); + + if (task != NULL) { + + /* Put the task into the abort path if it's not there + * already. + */ + if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) + sas_task_abort(task); + + } else { + /* This is a case where the request has completed with a + * status such that it needed further target servicing, + * but the sas_task reference has already been removed + * from the request. Since it was errored, it was not + * being aborted, so there is nothing to do except free + * it. + */ + + spin_lock_irq(&ihost->scic_lock); + /* Remove the request from the remote device's list + * of pending requests. + */ + list_del_init(&request->dev_node); + isci_free_tag(ihost, request->io_tag); + spin_unlock_irq(&ihost->scic_lock); + } + } + +} + +/** + * sci_controller_stop() - This method will stop an individual controller + * object.This method will invoke the associated user callback upon + * completion. The completion callback is called when the following + * conditions are met: -# the method return status is SCI_SUCCESS. -# the + * controller has been quiesced. This method will ensure that all IO + * requests are quiesced, phys are stopped, and all additional operation by + * the hardware is halted. + * @controller: the handle to the controller object to stop. + * @timeout: This parameter specifies the number of milliseconds in which the + * stop operation should complete. + * + * The controller must be in the STARTED or STOPPED state. Indicate if the + * controller stop method succeeded or failed in some way. SCI_SUCCESS if the + * stop operation successfully began. SCI_WARNING_ALREADY_IN_STATE if the + * controller is already in the STOPPED state. SCI_FAILURE_INVALID_STATE if the + * controller is not either in the STARTED or STOPPED states. + */ +static enum sci_status sci_controller_stop(struct isci_host *ihost, u32 timeout) +{ + if (ihost->sm.current_state_id != SCIC_READY) { + dev_warn(&ihost->pdev->dev, + "SCIC Controller stop operation requested in " + "invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } + + sci_mod_timer(&ihost->timer, timeout); + sci_change_state(&ihost->sm, SCIC_STOPPING); + return SCI_SUCCESS; +} + +/** + * sci_controller_reset() - This method will reset the supplied core + * controller regardless of the state of said controller. This operation is + * considered destructive. In other words, all current operations are wiped + * out. No IO completions for outstanding devices occur. Outstanding IO + * requests are not aborted or completed at the actual remote device. + * @controller: the handle to the controller object to reset. + * + * Indicate if the controller reset method succeeded or failed in some way. + * SCI_SUCCESS if the reset operation successfully started. SCI_FATAL_ERROR if + * the controller reset operation is unable to complete. + */ +static enum sci_status sci_controller_reset(struct isci_host *ihost) +{ + switch (ihost->sm.current_state_id) { + case SCIC_RESET: + case SCIC_READY: + case SCIC_STOPPED: + case SCIC_FAILED: + /* + * The reset operation is not a graceful cleanup, just + * perform the state transition. + */ + sci_change_state(&ihost->sm, SCIC_RESETTING); + return SCI_SUCCESS; + default: + dev_warn(&ihost->pdev->dev, + "SCIC Controller reset operation requested in " + "invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } +} + +void isci_host_deinit(struct isci_host *ihost) +{ + int i; + + isci_host_change_state(ihost, isci_stopping); + for (i = 0; i < SCI_MAX_PORTS; i++) { + struct isci_port *iport = &ihost->ports[i]; + struct isci_remote_device *idev, *d; + + list_for_each_entry_safe(idev, d, &iport->remote_dev_list, node) { + if (test_bit(IDEV_ALLOCATED, &idev->flags)) + isci_remote_device_stop(ihost, idev); + } + } + + set_bit(IHOST_STOP_PENDING, &ihost->flags); + + spin_lock_irq(&ihost->scic_lock); + sci_controller_stop(ihost, SCIC_CONTROLLER_STOP_TIMEOUT); + spin_unlock_irq(&ihost->scic_lock); + + wait_for_stop(ihost); + sci_controller_reset(ihost); + + /* Cancel any/all outstanding port timers */ + for (i = 0; i < ihost->logical_port_entries; i++) { + struct isci_port *iport = &ihost->ports[i]; + del_timer_sync(&iport->timer.timer); + } + + /* Cancel any/all outstanding phy timers */ + for (i = 0; i < SCI_MAX_PHYS; i++) { + struct isci_phy *iphy = &ihost->phys[i]; + del_timer_sync(&iphy->sata_timer.timer); + } + + del_timer_sync(&ihost->port_agent.timer.timer); + + del_timer_sync(&ihost->power_control.timer.timer); + + del_timer_sync(&ihost->timer.timer); + + del_timer_sync(&ihost->phy_timer.timer); +} + +static void __iomem *scu_base(struct isci_host *isci_host) +{ + struct pci_dev *pdev = isci_host->pdev; + int id = isci_host->id; + + return pcim_iomap_table(pdev)[SCI_SCU_BAR * 2] + SCI_SCU_BAR_SIZE * id; +} + +static void __iomem *smu_base(struct isci_host *isci_host) +{ + struct pci_dev *pdev = isci_host->pdev; + int id = isci_host->id; + + return pcim_iomap_table(pdev)[SCI_SMU_BAR * 2] + SCI_SMU_BAR_SIZE * id; +} + +static void isci_user_parameters_get(struct sci_user_parameters *u) +{ + int i; + + for (i = 0; i < SCI_MAX_PHYS; i++) { + struct sci_phy_user_params *u_phy = &u->phys[i]; + + u_phy->max_speed_generation = phy_gen; + + /* we are not exporting these for now */ + u_phy->align_insertion_frequency = 0x7f; + u_phy->in_connection_align_insertion_frequency = 0xff; + u_phy->notify_enable_spin_up_insertion_frequency = 0x33; + } + + u->stp_inactivity_timeout = stp_inactive_to; + u->ssp_inactivity_timeout = ssp_inactive_to; + u->stp_max_occupancy_timeout = stp_max_occ_to; + u->ssp_max_occupancy_timeout = ssp_max_occ_to; + u->no_outbound_task_timeout = no_outbound_task_to; + u->max_number_concurrent_device_spin_up = max_concurr_spinup; +} + +static void sci_controller_initial_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + + sci_change_state(&ihost->sm, SCIC_RESET); +} + +static inline void sci_controller_starting_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + + sci_del_timer(&ihost->timer); +} + +#define INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_LOWER_BOUND_NS 853 +#define INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_UPPER_BOUND_NS 1280 +#define INTERRUPT_COALESCE_TIMEOUT_MAX_US 2700000 +#define INTERRUPT_COALESCE_NUMBER_MAX 256 +#define INTERRUPT_COALESCE_TIMEOUT_ENCODE_MIN 7 +#define INTERRUPT_COALESCE_TIMEOUT_ENCODE_MAX 28 + +/** + * sci_controller_set_interrupt_coalescence() - This method allows the user to + * configure the interrupt coalescence. + * @controller: This parameter represents the handle to the controller object + * for which its interrupt coalesce register is overridden. + * @coalesce_number: Used to control the number of entries in the Completion + * Queue before an interrupt is generated. If the number of entries exceed + * this number, an interrupt will be generated. The valid range of the input + * is [0, 256]. A setting of 0 results in coalescing being disabled. + * @coalesce_timeout: Timeout value in microseconds. The valid range of the + * input is [0, 2700000] . A setting of 0 is allowed and results in no + * interrupt coalescing timeout. + * + * Indicate if the user successfully set the interrupt coalesce parameters. + * SCI_SUCCESS The user successfully updated the interrutp coalescence. + * SCI_FAILURE_INVALID_PARAMETER_VALUE The user input value is out of range. + */ +static enum sci_status +sci_controller_set_interrupt_coalescence(struct isci_host *ihost, + u32 coalesce_number, + u32 coalesce_timeout) +{ + u8 timeout_encode = 0; + u32 min = 0; + u32 max = 0; + + /* Check if the input parameters fall in the range. */ + if (coalesce_number > INTERRUPT_COALESCE_NUMBER_MAX) + return SCI_FAILURE_INVALID_PARAMETER_VALUE; + + /* + * Defined encoding for interrupt coalescing timeout: + * Value Min Max Units + * ----- --- --- ----- + * 0 - - Disabled + * 1 13.3 20.0 ns + * 2 26.7 40.0 + * 3 53.3 80.0 + * 4 106.7 160.0 + * 5 213.3 320.0 + * 6 426.7 640.0 + * 7 853.3 1280.0 + * 8 1.7 2.6 us + * 9 3.4 5.1 + * 10 6.8 10.2 + * 11 13.7 20.5 + * 12 27.3 41.0 + * 13 54.6 81.9 + * 14 109.2 163.8 + * 15 218.5 327.7 + * 16 436.9 655.4 + * 17 873.8 1310.7 + * 18 1.7 2.6 ms + * 19 3.5 5.2 + * 20 7.0 10.5 + * 21 14.0 21.0 + * 22 28.0 41.9 + * 23 55.9 83.9 + * 24 111.8 167.8 + * 25 223.7 335.5 + * 26 447.4 671.1 + * 27 894.8 1342.2 + * 28 1.8 2.7 s + * Others Undefined */ + + /* + * Use the table above to decide the encode of interrupt coalescing timeout + * value for register writing. */ + if (coalesce_timeout == 0) + timeout_encode = 0; + else{ + /* make the timeout value in unit of (10 ns). */ + coalesce_timeout = coalesce_timeout * 100; + min = INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_LOWER_BOUND_NS / 10; + max = INTERRUPT_COALESCE_TIMEOUT_BASE_RANGE_UPPER_BOUND_NS / 10; + + /* get the encode of timeout for register writing. */ + for (timeout_encode = INTERRUPT_COALESCE_TIMEOUT_ENCODE_MIN; + timeout_encode <= INTERRUPT_COALESCE_TIMEOUT_ENCODE_MAX; + timeout_encode++) { + if (min <= coalesce_timeout && max > coalesce_timeout) + break; + else if (coalesce_timeout >= max && coalesce_timeout < min * 2 + && coalesce_timeout <= INTERRUPT_COALESCE_TIMEOUT_MAX_US * 100) { + if ((coalesce_timeout - max) < (2 * min - coalesce_timeout)) + break; + else{ + timeout_encode++; + break; + } + } else { + max = max * 2; + min = min * 2; + } + } + + if (timeout_encode == INTERRUPT_COALESCE_TIMEOUT_ENCODE_MAX + 1) + /* the value is out of range. */ + return SCI_FAILURE_INVALID_PARAMETER_VALUE; + } + + writel(SMU_ICC_GEN_VAL(NUMBER, coalesce_number) | + SMU_ICC_GEN_VAL(TIMER, timeout_encode), + &ihost->smu_registers->interrupt_coalesce_control); + + + ihost->interrupt_coalesce_number = (u16)coalesce_number; + ihost->interrupt_coalesce_timeout = coalesce_timeout / 100; + + return SCI_SUCCESS; +} + + +static void sci_controller_ready_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + + /* set the default interrupt coalescence number and timeout value. */ + sci_controller_set_interrupt_coalescence(ihost, 0x10, 250); +} + +static void sci_controller_ready_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + + /* disable interrupt coalescence. */ + sci_controller_set_interrupt_coalescence(ihost, 0, 0); +} + +static enum sci_status sci_controller_stop_phys(struct isci_host *ihost) +{ + u32 index; + enum sci_status status; + enum sci_status phy_status; + + status = SCI_SUCCESS; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + phy_status = sci_phy_stop(&ihost->phys[index]); + + if (phy_status != SCI_SUCCESS && + phy_status != SCI_FAILURE_INVALID_STATE) { + status = SCI_FAILURE; + + dev_warn(&ihost->pdev->dev, + "%s: Controller stop operation failed to stop " + "phy %d because of status %d.\n", + __func__, + ihost->phys[index].phy_index, phy_status); + } + } + + return status; +} + +static enum sci_status sci_controller_stop_ports(struct isci_host *ihost) +{ + u32 index; + enum sci_status port_status; + enum sci_status status = SCI_SUCCESS; + + for (index = 0; index < ihost->logical_port_entries; index++) { + struct isci_port *iport = &ihost->ports[index]; + + port_status = sci_port_stop(iport); + + if ((port_status != SCI_SUCCESS) && + (port_status != SCI_FAILURE_INVALID_STATE)) { + status = SCI_FAILURE; + + dev_warn(&ihost->pdev->dev, + "%s: Controller stop operation failed to " + "stop port %d because of status %d.\n", + __func__, + iport->logical_port_index, + port_status); + } + } + + return status; +} + +static enum sci_status sci_controller_stop_devices(struct isci_host *ihost) +{ + u32 index; + enum sci_status status; + enum sci_status device_status; + + status = SCI_SUCCESS; + + for (index = 0; index < ihost->remote_node_entries; index++) { + if (ihost->device_table[index] != NULL) { + /* / @todo What timeout value do we want to provide to this request? */ + device_status = sci_remote_device_stop(ihost->device_table[index], 0); + + if ((device_status != SCI_SUCCESS) && + (device_status != SCI_FAILURE_INVALID_STATE)) { + dev_warn(&ihost->pdev->dev, + "%s: Controller stop operation failed " + "to stop device 0x%p because of " + "status %d.\n", + __func__, + ihost->device_table[index], device_status); + } + } + } + + return status; +} + +static void sci_controller_stopping_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + + /* Stop all of the components for this controller */ + sci_controller_stop_phys(ihost); + sci_controller_stop_ports(ihost); + sci_controller_stop_devices(ihost); +} + +static void sci_controller_stopping_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + + sci_del_timer(&ihost->timer); +} + +static void sci_controller_reset_hardware(struct isci_host *ihost) +{ + /* Disable interrupts so we dont take any spurious interrupts */ + sci_controller_disable_interrupts(ihost); + + /* Reset the SCU */ + writel(0xFFFFFFFF, &ihost->smu_registers->soft_reset_control); + + /* Delay for 1ms to before clearing the CQP and UFQPR. */ + udelay(1000); + + /* The write to the CQGR clears the CQP */ + writel(0x00000000, &ihost->smu_registers->completion_queue_get); + + /* The write to the UFQGP clears the UFQPR */ + writel(0, &ihost->scu_registers->sdma.unsolicited_frame_get_pointer); +} + +static void sci_controller_resetting_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + + sci_controller_reset_hardware(ihost); + sci_change_state(&ihost->sm, SCIC_RESET); +} + +static const struct sci_base_state sci_controller_state_table[] = { + [SCIC_INITIAL] = { + .enter_state = sci_controller_initial_state_enter, + }, + [SCIC_RESET] = {}, + [SCIC_INITIALIZING] = {}, + [SCIC_INITIALIZED] = {}, + [SCIC_STARTING] = { + .exit_state = sci_controller_starting_state_exit, + }, + [SCIC_READY] = { + .enter_state = sci_controller_ready_state_enter, + .exit_state = sci_controller_ready_state_exit, + }, + [SCIC_RESETTING] = { + .enter_state = sci_controller_resetting_state_enter, + }, + [SCIC_STOPPING] = { + .enter_state = sci_controller_stopping_state_enter, + .exit_state = sci_controller_stopping_state_exit, + }, + [SCIC_STOPPED] = {}, + [SCIC_FAILED] = {} +}; + +static void sci_controller_set_default_config_parameters(struct isci_host *ihost) +{ + /* these defaults are overridden by the platform / firmware */ + u16 index; + + /* Default to APC mode. */ + ihost->oem_parameters.controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE; + + /* Default to APC mode. */ + ihost->oem_parameters.controller.max_concurrent_dev_spin_up = 1; + + /* Default to no SSC operation. */ + ihost->oem_parameters.controller.do_enable_ssc = false; + + /* Initialize all of the port parameter information to narrow ports. */ + for (index = 0; index < SCI_MAX_PORTS; index++) { + ihost->oem_parameters.ports[index].phy_mask = 0; + } + + /* Initialize all of the phy parameter information. */ + for (index = 0; index < SCI_MAX_PHYS; index++) { + /* Default to 6G (i.e. Gen 3) for now. */ + ihost->user_parameters.phys[index].max_speed_generation = 3; + + /* the frequencies cannot be 0 */ + ihost->user_parameters.phys[index].align_insertion_frequency = 0x7f; + ihost->user_parameters.phys[index].in_connection_align_insertion_frequency = 0xff; + ihost->user_parameters.phys[index].notify_enable_spin_up_insertion_frequency = 0x33; + + /* + * Previous Vitesse based expanders had a arbitration issue that + * is worked around by having the upper 32-bits of SAS address + * with a value greater then the Vitesse company identifier. + * Hence, usage of 0x5FCFFFFF. */ + ihost->oem_parameters.phys[index].sas_address.low = 0x1 + ihost->id; + ihost->oem_parameters.phys[index].sas_address.high = 0x5FCFFFFF; + } + + ihost->user_parameters.stp_inactivity_timeout = 5; + ihost->user_parameters.ssp_inactivity_timeout = 5; + ihost->user_parameters.stp_max_occupancy_timeout = 5; + ihost->user_parameters.ssp_max_occupancy_timeout = 20; + ihost->user_parameters.no_outbound_task_timeout = 20; +} + +static void controller_timeout(unsigned long data) +{ + struct sci_timer *tmr = (struct sci_timer *)data; + struct isci_host *ihost = container_of(tmr, typeof(*ihost), timer); + struct sci_base_state_machine *sm = &ihost->sm; + unsigned long flags; + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmr->cancel) + goto done; + + if (sm->current_state_id == SCIC_STARTING) + sci_controller_transition_to_ready(ihost, SCI_FAILURE_TIMEOUT); + else if (sm->current_state_id == SCIC_STOPPING) { + sci_change_state(sm, SCIC_FAILED); + isci_host_stop_complete(ihost, SCI_FAILURE_TIMEOUT); + } else /* / @todo Now what do we want to do in this case? */ + dev_err(&ihost->pdev->dev, + "%s: Controller timer fired when controller was not " + "in a state being timed.\n", + __func__); + +done: + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +static enum sci_status sci_controller_construct(struct isci_host *ihost, + void __iomem *scu_base, + void __iomem *smu_base) +{ + u8 i; + + sci_init_sm(&ihost->sm, sci_controller_state_table, SCIC_INITIAL); + + ihost->scu_registers = scu_base; + ihost->smu_registers = smu_base; + + sci_port_configuration_agent_construct(&ihost->port_agent); + + /* Construct the ports for this controller */ + for (i = 0; i < SCI_MAX_PORTS; i++) + sci_port_construct(&ihost->ports[i], i, ihost); + sci_port_construct(&ihost->ports[i], SCIC_SDS_DUMMY_PORT, ihost); + + /* Construct the phys for this controller */ + for (i = 0; i < SCI_MAX_PHYS; i++) { + /* Add all the PHYs to the dummy port */ + sci_phy_construct(&ihost->phys[i], + &ihost->ports[SCI_MAX_PORTS], i); + } + + ihost->invalid_phy_mask = 0; + + sci_init_timer(&ihost->timer, controller_timeout); + + /* Initialize the User and OEM parameters to default values. */ + sci_controller_set_default_config_parameters(ihost); + + return sci_controller_reset(ihost); +} + +int sci_oem_parameters_validate(struct sci_oem_params *oem) +{ + int i; + + for (i = 0; i < SCI_MAX_PORTS; i++) + if (oem->ports[i].phy_mask > SCIC_SDS_PARM_PHY_MASK_MAX) + return -EINVAL; + + for (i = 0; i < SCI_MAX_PHYS; i++) + if (oem->phys[i].sas_address.high == 0 && + oem->phys[i].sas_address.low == 0) + return -EINVAL; + + if (oem->controller.mode_type == SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE) { + for (i = 0; i < SCI_MAX_PHYS; i++) + if (oem->ports[i].phy_mask != 0) + return -EINVAL; + } else if (oem->controller.mode_type == SCIC_PORT_MANUAL_CONFIGURATION_MODE) { + u8 phy_mask = 0; + + for (i = 0; i < SCI_MAX_PHYS; i++) + phy_mask |= oem->ports[i].phy_mask; + + if (phy_mask == 0) + return -EINVAL; + } else + return -EINVAL; + + if (oem->controller.max_concurrent_dev_spin_up > MAX_CONCURRENT_DEVICE_SPIN_UP_COUNT) + return -EINVAL; + + return 0; +} + +static enum sci_status sci_oem_parameters_set(struct isci_host *ihost) +{ + u32 state = ihost->sm.current_state_id; + + if (state == SCIC_RESET || + state == SCIC_INITIALIZING || + state == SCIC_INITIALIZED) { + + if (sci_oem_parameters_validate(&ihost->oem_parameters)) + return SCI_FAILURE_INVALID_PARAMETER_VALUE; + + return SCI_SUCCESS; + } + + return SCI_FAILURE_INVALID_STATE; +} + +static void power_control_timeout(unsigned long data) +{ + struct sci_timer *tmr = (struct sci_timer *)data; + struct isci_host *ihost = container_of(tmr, typeof(*ihost), power_control.timer); + struct isci_phy *iphy; + unsigned long flags; + u8 i; + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmr->cancel) + goto done; + + ihost->power_control.phys_granted_power = 0; + + if (ihost->power_control.phys_waiting == 0) { + ihost->power_control.timer_started = false; + goto done; + } + + for (i = 0; i < SCI_MAX_PHYS; i++) { + + if (ihost->power_control.phys_waiting == 0) + break; + + iphy = ihost->power_control.requesters[i]; + if (iphy == NULL) + continue; + + if (ihost->power_control.phys_granted_power >= + ihost->oem_parameters.controller.max_concurrent_dev_spin_up) + break; + + ihost->power_control.requesters[i] = NULL; + ihost->power_control.phys_waiting--; + ihost->power_control.phys_granted_power++; + sci_phy_consume_power_handler(iphy); + } + + /* + * It doesn't matter if the power list is empty, we need to start the + * timer in case another phy becomes ready. + */ + sci_mod_timer(tmr, SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL); + ihost->power_control.timer_started = true; + +done: + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +void sci_controller_power_control_queue_insert(struct isci_host *ihost, + struct isci_phy *iphy) +{ + BUG_ON(iphy == NULL); + + if (ihost->power_control.phys_granted_power < + ihost->oem_parameters.controller.max_concurrent_dev_spin_up) { + ihost->power_control.phys_granted_power++; + sci_phy_consume_power_handler(iphy); + + /* + * stop and start the power_control timer. When the timer fires, the + * no_of_phys_granted_power will be set to 0 + */ + if (ihost->power_control.timer_started) + sci_del_timer(&ihost->power_control.timer); + + sci_mod_timer(&ihost->power_control.timer, + SCIC_SDS_CONTROLLER_POWER_CONTROL_INTERVAL); + ihost->power_control.timer_started = true; + + } else { + /* Add the phy in the waiting list */ + ihost->power_control.requesters[iphy->phy_index] = iphy; + ihost->power_control.phys_waiting++; + } +} + +void sci_controller_power_control_queue_remove(struct isci_host *ihost, + struct isci_phy *iphy) +{ + BUG_ON(iphy == NULL); + + if (ihost->power_control.requesters[iphy->phy_index]) + ihost->power_control.phys_waiting--; + + ihost->power_control.requesters[iphy->phy_index] = NULL; +} + +#define AFE_REGISTER_WRITE_DELAY 10 + +/* Initialize the AFE for this phy index. We need to read the AFE setup from + * the OEM parameters + */ +static void sci_controller_afe_initialization(struct isci_host *ihost) +{ + const struct sci_oem_params *oem = &ihost->oem_parameters; + struct pci_dev *pdev = ihost->pdev; + u32 afe_status; + u32 phy_id; + + /* Clear DFX Status registers */ + writel(0x0081000f, &ihost->scu_registers->afe.afe_dfx_master_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + + if (is_b0(pdev)) { + /* PM Rx Equalization Save, PM SPhy Rx Acknowledgement + * Timer, PM Stagger Timer */ + writel(0x0007BFFF, &ihost->scu_registers->afe.afe_pmsn_master_control2); + udelay(AFE_REGISTER_WRITE_DELAY); + } + + /* Configure bias currents to normal */ + if (is_a2(pdev)) + writel(0x00005A00, &ihost->scu_registers->afe.afe_bias_control); + else if (is_b0(pdev) || is_c0(pdev)) + writel(0x00005F00, &ihost->scu_registers->afe.afe_bias_control); + + udelay(AFE_REGISTER_WRITE_DELAY); + + /* Enable PLL */ + if (is_b0(pdev) || is_c0(pdev)) + writel(0x80040A08, &ihost->scu_registers->afe.afe_pll_control0); + else + writel(0x80040908, &ihost->scu_registers->afe.afe_pll_control0); + + udelay(AFE_REGISTER_WRITE_DELAY); + + /* Wait for the PLL to lock */ + do { + afe_status = readl(&ihost->scu_registers->afe.afe_common_block_status); + udelay(AFE_REGISTER_WRITE_DELAY); + } while ((afe_status & 0x00001000) == 0); + + if (is_a2(pdev)) { + /* Shorten SAS SNW lock time (RxLock timer value from 76 us to 50 us) */ + writel(0x7bcc96ad, &ihost->scu_registers->afe.afe_pmsn_master_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + } + + for (phy_id = 0; phy_id < SCI_MAX_PHYS; phy_id++) { + const struct sci_phy_oem_params *oem_phy = &oem->phys[phy_id]; + + if (is_b0(pdev)) { + /* Configure transmitter SSC parameters */ + writel(0x00030000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_ssc_control); + udelay(AFE_REGISTER_WRITE_DELAY); + } else if (is_c0(pdev)) { + /* Configure transmitter SSC parameters */ + writel(0x0003000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_ssc_control); + udelay(AFE_REGISTER_WRITE_DELAY); + + /* + * All defaults, except the Receive Word Alignament/Comma Detect + * Enable....(0xe800) */ + writel(0x00004500, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + } else { + /* + * All defaults, except the Receive Word Alignament/Comma Detect + * Enable....(0xe800) */ + writel(0x00004512, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + + writel(0x0050100F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control1); + udelay(AFE_REGISTER_WRITE_DELAY); + } + + /* + * Power up TX and RX out from power down (PWRDNTX and PWRDNRX) + * & increase TX int & ext bias 20%....(0xe85c) */ + if (is_a2(pdev)) + writel(0x000003F0, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control); + else if (is_b0(pdev)) { + /* Power down TX and RX (PWRDNTX and PWRDNRX) */ + writel(0x000003D7, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control); + udelay(AFE_REGISTER_WRITE_DELAY); + + /* + * Power up TX and RX out from power down (PWRDNTX and PWRDNRX) + * & increase TX int & ext bias 20%....(0xe85c) */ + writel(0x000003D4, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control); + } else { + writel(0x000001E7, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control); + udelay(AFE_REGISTER_WRITE_DELAY); + + /* + * Power up TX and RX out from power down (PWRDNTX and PWRDNRX) + * & increase TX int & ext bias 20%....(0xe85c) */ + writel(0x000001E4, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_channel_control); + } + udelay(AFE_REGISTER_WRITE_DELAY); + + if (is_a2(pdev)) { + /* Enable TX equalization (0xe824) */ + writel(0x00040000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_control); + udelay(AFE_REGISTER_WRITE_DELAY); + } + + /* + * RDPI=0x0(RX Power On), RXOOBDETPDNC=0x0, TPD=0x0(TX Power On), + * RDD=0x0(RX Detect Enabled) ....(0xe800) */ + writel(0x00004100, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_xcvr_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + + /* Leave DFE/FFE on */ + if (is_a2(pdev)) + writel(0x3F11103F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control0); + else if (is_b0(pdev)) { + writel(0x3F11103F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + /* Enable TX equalization (0xe824) */ + writel(0x00040000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_control); + } else { + writel(0x0140DF0F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control1); + udelay(AFE_REGISTER_WRITE_DELAY); + + writel(0x3F6F103F, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_rx_ssc_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + + /* Enable TX equalization (0xe824) */ + writel(0x00040000, &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_control); + } + + udelay(AFE_REGISTER_WRITE_DELAY); + + writel(oem_phy->afe_tx_amp_control0, + &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control0); + udelay(AFE_REGISTER_WRITE_DELAY); + + writel(oem_phy->afe_tx_amp_control1, + &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control1); + udelay(AFE_REGISTER_WRITE_DELAY); + + writel(oem_phy->afe_tx_amp_control2, + &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control2); + udelay(AFE_REGISTER_WRITE_DELAY); + + writel(oem_phy->afe_tx_amp_control3, + &ihost->scu_registers->afe.scu_afe_xcvr[phy_id].afe_tx_amp_control3); + udelay(AFE_REGISTER_WRITE_DELAY); + } + + /* Transfer control to the PEs */ + writel(0x00010f00, &ihost->scu_registers->afe.afe_dfx_master_control0); + udelay(AFE_REGISTER_WRITE_DELAY); +} + +static void sci_controller_initialize_power_control(struct isci_host *ihost) +{ + sci_init_timer(&ihost->power_control.timer, power_control_timeout); + + memset(ihost->power_control.requesters, 0, + sizeof(ihost->power_control.requesters)); + + ihost->power_control.phys_waiting = 0; + ihost->power_control.phys_granted_power = 0; +} + +static enum sci_status sci_controller_initialize(struct isci_host *ihost) +{ + struct sci_base_state_machine *sm = &ihost->sm; + enum sci_status result = SCI_FAILURE; + unsigned long i, state, val; + + if (ihost->sm.current_state_id != SCIC_RESET) { + dev_warn(&ihost->pdev->dev, + "SCIC Controller initialize operation requested " + "in invalid state\n"); + return SCI_FAILURE_INVALID_STATE; + } + + sci_change_state(sm, SCIC_INITIALIZING); + + sci_init_timer(&ihost->phy_timer, phy_startup_timeout); + + ihost->next_phy_to_start = 0; + ihost->phy_startup_timer_pending = false; + + sci_controller_initialize_power_control(ihost); + + /* + * There is nothing to do here for B0 since we do not have to + * program the AFE registers. + * / @todo The AFE settings are supposed to be correct for the B0 but + * / presently they seem to be wrong. */ + sci_controller_afe_initialization(ihost); + + + /* Take the hardware out of reset */ + writel(0, &ihost->smu_registers->soft_reset_control); + + /* + * / @todo Provide meaningfull error code for hardware failure + * result = SCI_FAILURE_CONTROLLER_HARDWARE; */ + for (i = 100; i >= 1; i--) { + u32 status; + + /* Loop until the hardware reports success */ + udelay(SCU_CONTEXT_RAM_INIT_STALL_TIME); + status = readl(&ihost->smu_registers->control_status); + + if ((status & SCU_RAM_INIT_COMPLETED) == SCU_RAM_INIT_COMPLETED) + break; + } + if (i == 0) + goto out; + + /* + * Determine what are the actaul device capacities that the + * hardware will support */ + val = readl(&ihost->smu_registers->device_context_capacity); + + /* Record the smaller of the two capacity values */ + ihost->logical_port_entries = min(smu_max_ports(val), SCI_MAX_PORTS); + ihost->task_context_entries = min(smu_max_task_contexts(val), SCI_MAX_IO_REQUESTS); + ihost->remote_node_entries = min(smu_max_rncs(val), SCI_MAX_REMOTE_DEVICES); + + /* + * Make all PEs that are unassigned match up with the + * logical ports + */ + for (i = 0; i < ihost->logical_port_entries; i++) { + struct scu_port_task_scheduler_group_registers __iomem + *ptsg = &ihost->scu_registers->peg0.ptsg; + + writel(i, &ptsg->protocol_engine[i]); + } + + /* Initialize hardware PCI Relaxed ordering in DMA engines */ + val = readl(&ihost->scu_registers->sdma.pdma_configuration); + val |= SCU_PDMACR_GEN_BIT(PCI_RELAXED_ORDERING_ENABLE); + writel(val, &ihost->scu_registers->sdma.pdma_configuration); + + val = readl(&ihost->scu_registers->sdma.cdma_configuration); + val |= SCU_CDMACR_GEN_BIT(PCI_RELAXED_ORDERING_ENABLE); + writel(val, &ihost->scu_registers->sdma.cdma_configuration); + + /* + * Initialize the PHYs before the PORTs because the PHY registers + * are accessed during the port initialization. + */ + for (i = 0; i < SCI_MAX_PHYS; i++) { + result = sci_phy_initialize(&ihost->phys[i], + &ihost->scu_registers->peg0.pe[i].tl, + &ihost->scu_registers->peg0.pe[i].ll); + if (result != SCI_SUCCESS) + goto out; + } + + for (i = 0; i < ihost->logical_port_entries; i++) { + struct isci_port *iport = &ihost->ports[i]; + + iport->port_task_scheduler_registers = &ihost->scu_registers->peg0.ptsg.port[i]; + iport->port_pe_configuration_register = &ihost->scu_registers->peg0.ptsg.protocol_engine[0]; + iport->viit_registers = &ihost->scu_registers->peg0.viit[i]; + } + + result = sci_port_configuration_agent_initialize(ihost, &ihost->port_agent); + + out: + /* Advance the controller state machine */ + if (result == SCI_SUCCESS) + state = SCIC_INITIALIZED; + else + state = SCIC_FAILED; + sci_change_state(sm, state); + + return result; +} + +static enum sci_status sci_user_parameters_set(struct isci_host *ihost, + struct sci_user_parameters *sci_parms) +{ + u32 state = ihost->sm.current_state_id; + + if (state == SCIC_RESET || + state == SCIC_INITIALIZING || + state == SCIC_INITIALIZED) { + u16 index; + + /* + * Validate the user parameters. If they are not legal, then + * return a failure. + */ + for (index = 0; index < SCI_MAX_PHYS; index++) { + struct sci_phy_user_params *user_phy; + + user_phy = &sci_parms->phys[index]; + + if (!((user_phy->max_speed_generation <= + SCIC_SDS_PARM_MAX_SPEED) && + (user_phy->max_speed_generation > + SCIC_SDS_PARM_NO_SPEED))) + return SCI_FAILURE_INVALID_PARAMETER_VALUE; + + if (user_phy->in_connection_align_insertion_frequency < + 3) + return SCI_FAILURE_INVALID_PARAMETER_VALUE; + + if ((user_phy->in_connection_align_insertion_frequency < + 3) || + (user_phy->align_insertion_frequency == 0) || + (user_phy-> + notify_enable_spin_up_insertion_frequency == + 0)) + return SCI_FAILURE_INVALID_PARAMETER_VALUE; + } + + if ((sci_parms->stp_inactivity_timeout == 0) || + (sci_parms->ssp_inactivity_timeout == 0) || + (sci_parms->stp_max_occupancy_timeout == 0) || + (sci_parms->ssp_max_occupancy_timeout == 0) || + (sci_parms->no_outbound_task_timeout == 0)) + return SCI_FAILURE_INVALID_PARAMETER_VALUE; + + memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms)); + + return SCI_SUCCESS; + } + + return SCI_FAILURE_INVALID_STATE; +} + +static int sci_controller_mem_init(struct isci_host *ihost) +{ + struct device *dev = &ihost->pdev->dev; + dma_addr_t dma; + size_t size; + int err; + + size = SCU_MAX_COMPLETION_QUEUE_ENTRIES * sizeof(u32); + ihost->completion_queue = dmam_alloc_coherent(dev, size, &dma, GFP_KERNEL); + if (!ihost->completion_queue) + return -ENOMEM; + + writel(lower_32_bits(dma), &ihost->smu_registers->completion_queue_lower); + writel(upper_32_bits(dma), &ihost->smu_registers->completion_queue_upper); + + size = ihost->remote_node_entries * sizeof(union scu_remote_node_context); + ihost->remote_node_context_table = dmam_alloc_coherent(dev, size, &dma, + GFP_KERNEL); + if (!ihost->remote_node_context_table) + return -ENOMEM; + + writel(lower_32_bits(dma), &ihost->smu_registers->remote_node_context_lower); + writel(upper_32_bits(dma), &ihost->smu_registers->remote_node_context_upper); + + size = ihost->task_context_entries * sizeof(struct scu_task_context), + ihost->task_context_table = dmam_alloc_coherent(dev, size, &dma, GFP_KERNEL); + if (!ihost->task_context_table) + return -ENOMEM; + + ihost->task_context_dma = dma; + writel(lower_32_bits(dma), &ihost->smu_registers->host_task_table_lower); + writel(upper_32_bits(dma), &ihost->smu_registers->host_task_table_upper); + + err = sci_unsolicited_frame_control_construct(ihost); + if (err) + return err; + + /* + * Inform the silicon as to the location of the UF headers and + * address table. + */ + writel(lower_32_bits(ihost->uf_control.headers.physical_address), + &ihost->scu_registers->sdma.uf_header_base_address_lower); + writel(upper_32_bits(ihost->uf_control.headers.physical_address), + &ihost->scu_registers->sdma.uf_header_base_address_upper); + + writel(lower_32_bits(ihost->uf_control.address_table.physical_address), + &ihost->scu_registers->sdma.uf_address_table_lower); + writel(upper_32_bits(ihost->uf_control.address_table.physical_address), + &ihost->scu_registers->sdma.uf_address_table_upper); + + return 0; +} + +int isci_host_init(struct isci_host *ihost) +{ + int err = 0, i; + enum sci_status status; + struct sci_user_parameters sci_user_params; + struct isci_pci_info *pci_info = to_pci_info(ihost->pdev); + + spin_lock_init(&ihost->state_lock); + spin_lock_init(&ihost->scic_lock); + init_waitqueue_head(&ihost->eventq); + + isci_host_change_state(ihost, isci_starting); + + status = sci_controller_construct(ihost, scu_base(ihost), + smu_base(ihost)); + + if (status != SCI_SUCCESS) { + dev_err(&ihost->pdev->dev, + "%s: sci_controller_construct failed - status = %x\n", + __func__, + status); + return -ENODEV; + } + + ihost->sas_ha.dev = &ihost->pdev->dev; + ihost->sas_ha.lldd_ha = ihost; + + /* + * grab initial values stored in the controller object for OEM and USER + * parameters + */ + isci_user_parameters_get(&sci_user_params); + status = sci_user_parameters_set(ihost, &sci_user_params); + if (status != SCI_SUCCESS) { + dev_warn(&ihost->pdev->dev, + "%s: sci_user_parameters_set failed\n", + __func__); + return -ENODEV; + } + + /* grab any OEM parameters specified in orom */ + if (pci_info->orom) { + status = isci_parse_oem_parameters(&ihost->oem_parameters, + pci_info->orom, + ihost->id); + if (status != SCI_SUCCESS) { + dev_warn(&ihost->pdev->dev, + "parsing firmware oem parameters failed\n"); + return -EINVAL; + } + } + + status = sci_oem_parameters_set(ihost); + if (status != SCI_SUCCESS) { + dev_warn(&ihost->pdev->dev, + "%s: sci_oem_parameters_set failed\n", + __func__); + return -ENODEV; + } + + tasklet_init(&ihost->completion_tasklet, + isci_host_completion_routine, (unsigned long)ihost); + + INIT_LIST_HEAD(&ihost->requests_to_complete); + INIT_LIST_HEAD(&ihost->requests_to_errorback); + + spin_lock_irq(&ihost->scic_lock); + status = sci_controller_initialize(ihost); + spin_unlock_irq(&ihost->scic_lock); + if (status != SCI_SUCCESS) { + dev_warn(&ihost->pdev->dev, + "%s: sci_controller_initialize failed -" + " status = 0x%x\n", + __func__, status); + return -ENODEV; + } + + err = sci_controller_mem_init(ihost); + if (err) + return err; + + for (i = 0; i < SCI_MAX_PORTS; i++) + isci_port_init(&ihost->ports[i], ihost, i); + + for (i = 0; i < SCI_MAX_PHYS; i++) + isci_phy_init(&ihost->phys[i], ihost, i); + + for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { + struct isci_remote_device *idev = &ihost->devices[i]; + + INIT_LIST_HEAD(&idev->reqs_in_process); + INIT_LIST_HEAD(&idev->node); + } + + for (i = 0; i < SCI_MAX_IO_REQUESTS; i++) { + struct isci_request *ireq; + dma_addr_t dma; + + ireq = dmam_alloc_coherent(&ihost->pdev->dev, + sizeof(struct isci_request), &dma, + GFP_KERNEL); + if (!ireq) + return -ENOMEM; + + ireq->tc = &ihost->task_context_table[i]; + ireq->owning_controller = ihost; + spin_lock_init(&ireq->state_lock); + ireq->request_daddr = dma; + ireq->isci_host = ihost; + ihost->reqs[i] = ireq; + } + + return 0; +} + +void sci_controller_link_up(struct isci_host *ihost, struct isci_port *iport, + struct isci_phy *iphy) +{ + switch (ihost->sm.current_state_id) { + case SCIC_STARTING: + sci_del_timer(&ihost->phy_timer); + ihost->phy_startup_timer_pending = false; + ihost->port_agent.link_up_handler(ihost, &ihost->port_agent, + iport, iphy); + sci_controller_start_next_phy(ihost); + break; + case SCIC_READY: + ihost->port_agent.link_up_handler(ihost, &ihost->port_agent, + iport, iphy); + break; + default: + dev_dbg(&ihost->pdev->dev, + "%s: SCIC Controller linkup event from phy %d in " + "unexpected state %d\n", __func__, iphy->phy_index, + ihost->sm.current_state_id); + } +} + +void sci_controller_link_down(struct isci_host *ihost, struct isci_port *iport, + struct isci_phy *iphy) +{ + switch (ihost->sm.current_state_id) { + case SCIC_STARTING: + case SCIC_READY: + ihost->port_agent.link_down_handler(ihost, &ihost->port_agent, + iport, iphy); + break; + default: + dev_dbg(&ihost->pdev->dev, + "%s: SCIC Controller linkdown event from phy %d in " + "unexpected state %d\n", + __func__, + iphy->phy_index, + ihost->sm.current_state_id); + } +} + +static bool sci_controller_has_remote_devices_stopping(struct isci_host *ihost) +{ + u32 index; + + for (index = 0; index < ihost->remote_node_entries; index++) { + if ((ihost->device_table[index] != NULL) && + (ihost->device_table[index]->sm.current_state_id == SCI_DEV_STOPPING)) + return true; + } + + return false; +} + +void sci_controller_remote_device_stopped(struct isci_host *ihost, + struct isci_remote_device *idev) +{ + if (ihost->sm.current_state_id != SCIC_STOPPING) { + dev_dbg(&ihost->pdev->dev, + "SCIC Controller 0x%p remote device stopped event " + "from device 0x%p in unexpected state %d\n", + ihost, idev, + ihost->sm.current_state_id); + return; + } + + if (!sci_controller_has_remote_devices_stopping(ihost)) + sci_change_state(&ihost->sm, SCIC_STOPPED); +} + +void sci_controller_post_request(struct isci_host *ihost, u32 request) +{ + dev_dbg(&ihost->pdev->dev, "%s[%d]: %#x\n", + __func__, ihost->id, request); + + writel(request, &ihost->smu_registers->post_context_port); +} + +struct isci_request *sci_request_by_tag(struct isci_host *ihost, u16 io_tag) +{ + u16 task_index; + u16 task_sequence; + + task_index = ISCI_TAG_TCI(io_tag); + + if (task_index < ihost->task_context_entries) { + struct isci_request *ireq = ihost->reqs[task_index]; + + if (test_bit(IREQ_ACTIVE, &ireq->flags)) { + task_sequence = ISCI_TAG_SEQ(io_tag); + + if (task_sequence == ihost->io_request_sequence[task_index]) + return ireq; + } + } + + return NULL; +} + +/** + * This method allocates remote node index and the reserves the remote node + * context space for use. This method can fail if there are no more remote + * node index available. + * @scic: This is the controller object which contains the set of + * free remote node ids + * @sci_dev: This is the device object which is requesting the a remote node + * id + * @node_id: This is the remote node id that is assinged to the device if one + * is available + * + * enum sci_status SCI_FAILURE_OUT_OF_RESOURCES if there are no available remote + * node index available. + */ +enum sci_status sci_controller_allocate_remote_node_context(struct isci_host *ihost, + struct isci_remote_device *idev, + u16 *node_id) +{ + u16 node_index; + u32 remote_node_count = sci_remote_device_node_count(idev); + + node_index = sci_remote_node_table_allocate_remote_node( + &ihost->available_remote_nodes, remote_node_count + ); + + if (node_index != SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) { + ihost->device_table[node_index] = idev; + + *node_id = node_index; + + return SCI_SUCCESS; + } + + return SCI_FAILURE_INSUFFICIENT_RESOURCES; +} + +void sci_controller_free_remote_node_context(struct isci_host *ihost, + struct isci_remote_device *idev, + u16 node_id) +{ + u32 remote_node_count = sci_remote_device_node_count(idev); + + if (ihost->device_table[node_id] == idev) { + ihost->device_table[node_id] = NULL; + + sci_remote_node_table_release_remote_node_index( + &ihost->available_remote_nodes, remote_node_count, node_id + ); + } +} + +void sci_controller_copy_sata_response(void *response_buffer, + void *frame_header, + void *frame_buffer) +{ + /* XXX type safety? */ + memcpy(response_buffer, frame_header, sizeof(u32)); + + memcpy(response_buffer + sizeof(u32), + frame_buffer, + sizeof(struct dev_to_host_fis) - sizeof(u32)); +} + +void sci_controller_release_frame(struct isci_host *ihost, u32 frame_index) +{ + if (sci_unsolicited_frame_control_release_frame(&ihost->uf_control, frame_index)) + writel(ihost->uf_control.get, + &ihost->scu_registers->sdma.unsolicited_frame_get_pointer); +} + +void isci_tci_free(struct isci_host *ihost, u16 tci) +{ + u16 tail = ihost->tci_tail & (SCI_MAX_IO_REQUESTS-1); + + ihost->tci_pool[tail] = tci; + ihost->tci_tail = tail + 1; +} + +static u16 isci_tci_alloc(struct isci_host *ihost) +{ + u16 head = ihost->tci_head & (SCI_MAX_IO_REQUESTS-1); + u16 tci = ihost->tci_pool[head]; + + ihost->tci_head = head + 1; + return tci; +} + +static u16 isci_tci_space(struct isci_host *ihost) +{ + return CIRC_SPACE(ihost->tci_head, ihost->tci_tail, SCI_MAX_IO_REQUESTS); +} + +u16 isci_alloc_tag(struct isci_host *ihost) +{ + if (isci_tci_space(ihost)) { + u16 tci = isci_tci_alloc(ihost); + u8 seq = ihost->io_request_sequence[tci]; + + return ISCI_TAG(seq, tci); + } + + return SCI_CONTROLLER_INVALID_IO_TAG; +} + +enum sci_status isci_free_tag(struct isci_host *ihost, u16 io_tag) +{ + u16 tci = ISCI_TAG_TCI(io_tag); + u16 seq = ISCI_TAG_SEQ(io_tag); + + /* prevent tail from passing head */ + if (isci_tci_active(ihost) == 0) + return SCI_FAILURE_INVALID_IO_TAG; + + if (seq == ihost->io_request_sequence[tci]) { + ihost->io_request_sequence[tci] = (seq+1) & (SCI_MAX_SEQ-1); + + isci_tci_free(ihost, tci); + + return SCI_SUCCESS; + } + return SCI_FAILURE_INVALID_IO_TAG; +} + +enum sci_status sci_controller_start_io(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + enum sci_status status; + + if (ihost->sm.current_state_id != SCIC_READY) { + dev_warn(&ihost->pdev->dev, "invalid state to start I/O"); + return SCI_FAILURE_INVALID_STATE; + } + + status = sci_remote_device_start_io(ihost, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + set_bit(IREQ_ACTIVE, &ireq->flags); + sci_controller_post_request(ihost, ireq->post_context); + return SCI_SUCCESS; +} + +enum sci_status sci_controller_terminate_request(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + /* terminate an ongoing (i.e. started) core IO request. This does not + * abort the IO request at the target, but rather removes the IO + * request from the host controller. + */ + enum sci_status status; + + if (ihost->sm.current_state_id != SCIC_READY) { + dev_warn(&ihost->pdev->dev, + "invalid state to terminate request\n"); + return SCI_FAILURE_INVALID_STATE; + } + + status = sci_io_request_terminate(ireq); + if (status != SCI_SUCCESS) + return status; + + /* + * Utilize the original post context command and or in the POST_TC_ABORT + * request sub-type. + */ + sci_controller_post_request(ihost, + ireq->post_context | SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT); + return SCI_SUCCESS; +} + +/** + * sci_controller_complete_io() - This method will perform core specific + * completion operations for an IO request. After this method is invoked, + * the user should consider the IO request as invalid until it is properly + * reused (i.e. re-constructed). + * @ihost: The handle to the controller object for which to complete the + * IO request. + * @idev: The handle to the remote device object for which to complete + * the IO request. + * @ireq: the handle to the io request object to complete. + */ +enum sci_status sci_controller_complete_io(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + enum sci_status status; + u16 index; + + switch (ihost->sm.current_state_id) { + case SCIC_STOPPING: + /* XXX: Implement this function */ + return SCI_FAILURE; + case SCIC_READY: + status = sci_remote_device_complete_io(ihost, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + index = ISCI_TAG_TCI(ireq->io_tag); + clear_bit(IREQ_ACTIVE, &ireq->flags); + return SCI_SUCCESS; + default: + dev_warn(&ihost->pdev->dev, "invalid state to complete I/O"); + return SCI_FAILURE_INVALID_STATE; + } + +} + +enum sci_status sci_controller_continue_io(struct isci_request *ireq) +{ + struct isci_host *ihost = ireq->owning_controller; + + if (ihost->sm.current_state_id != SCIC_READY) { + dev_warn(&ihost->pdev->dev, "invalid state to continue I/O"); + return SCI_FAILURE_INVALID_STATE; + } + + set_bit(IREQ_ACTIVE, &ireq->flags); + sci_controller_post_request(ihost, ireq->post_context); + return SCI_SUCCESS; +} + +/** + * sci_controller_start_task() - This method is called by the SCIC user to + * send/start a framework task management request. + * @controller: the handle to the controller object for which to start the task + * management request. + * @remote_device: the handle to the remote device object for which to start + * the task management request. + * @task_request: the handle to the task request object to start. + */ +enum sci_task_status sci_controller_start_task(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + enum sci_status status; + + if (ihost->sm.current_state_id != SCIC_READY) { + dev_warn(&ihost->pdev->dev, + "%s: SCIC Controller starting task from invalid " + "state\n", + __func__); + return SCI_TASK_FAILURE_INVALID_STATE; + } + + status = sci_remote_device_start_task(ihost, idev, ireq); + switch (status) { + case SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS: + set_bit(IREQ_ACTIVE, &ireq->flags); + + /* + * We will let framework know this task request started successfully, + * although core is still woring on starting the request (to post tc when + * RNC is resumed.) + */ + return SCI_SUCCESS; + case SCI_SUCCESS: + set_bit(IREQ_ACTIVE, &ireq->flags); + sci_controller_post_request(ihost, ireq->post_context); + break; + default: + break; + } + + return status; +} diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h new file mode 100644 index 000000000000..062101a39f79 --- /dev/null +++ b/drivers/scsi/isci/host.h @@ -0,0 +1,542 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _SCI_HOST_H_ +#define _SCI_HOST_H_ + +#include "remote_device.h" +#include "phy.h" +#include "isci.h" +#include "remote_node_table.h" +#include "registers.h" +#include "unsolicited_frame_control.h" +#include "probe_roms.h" + +struct isci_request; +struct scu_task_context; + + +/** + * struct sci_power_control - + * + * This structure defines the fields for managing power control for direct + * attached disk devices. + */ +struct sci_power_control { + /** + * This field is set when the power control timer is running and cleared when + * it is not. + */ + bool timer_started; + + /** + * Timer to control when the directed attached disks can consume power. + */ + struct sci_timer timer; + + /** + * This field is used to keep track of how many phys are put into the + * requesters field. + */ + u8 phys_waiting; + + /** + * This field is used to keep track of how many phys have been granted to consume power + */ + u8 phys_granted_power; + + /** + * This field is an array of phys that we are waiting on. The phys are direct + * mapped into requesters via struct sci_phy.phy_index + */ + struct isci_phy *requesters[SCI_MAX_PHYS]; + +}; + +struct sci_port_configuration_agent; +typedef void (*port_config_fn)(struct isci_host *, + struct sci_port_configuration_agent *, + struct isci_port *, struct isci_phy *); + +struct sci_port_configuration_agent { + u16 phy_configured_mask; + u16 phy_ready_mask; + struct { + u8 min_index; + u8 max_index; + } phy_valid_port_range[SCI_MAX_PHYS]; + bool timer_pending; + port_config_fn link_up_handler; + port_config_fn link_down_handler; + struct sci_timer timer; +}; + +/** + * isci_host - primary host/controller object + * @timer: timeout start/stop operations + * @device_table: rni (hw remote node index) to remote device lookup table + * @available_remote_nodes: rni allocator + * @power_control: manage device spin up + * @io_request_sequence: generation number for tci's (task contexts) + * @task_context_table: hw task context table + * @remote_node_context_table: hw remote node context table + * @completion_queue: hw-producer driver-consumer communication ring + * @completion_queue_get: tracks the driver 'head' of the ring to notify hw + * @logical_port_entries: min({driver|silicon}-supported-port-count) + * @remote_node_entries: min({driver|silicon}-supported-node-count) + * @task_context_entries: min({driver|silicon}-supported-task-count) + * @phy_timer: phy startup timer + * @invalid_phy_mask: if an invalid_link_up notification is reported a bit for + * the phy index is set so further notifications are not + * made. Once the phy reports link up and is made part of a + * port then this bit is cleared. + + */ +struct isci_host { + struct sci_base_state_machine sm; + /* XXX can we time this externally */ + struct sci_timer timer; + /* XXX drop reference module params directly */ + struct sci_user_parameters user_parameters; + /* XXX no need to be a union */ + struct sci_oem_params oem_parameters; + struct sci_port_configuration_agent port_agent; + struct isci_remote_device *device_table[SCI_MAX_REMOTE_DEVICES]; + struct sci_remote_node_table available_remote_nodes; + struct sci_power_control power_control; + u8 io_request_sequence[SCI_MAX_IO_REQUESTS]; + struct scu_task_context *task_context_table; + dma_addr_t task_context_dma; + union scu_remote_node_context *remote_node_context_table; + u32 *completion_queue; + u32 completion_queue_get; + u32 logical_port_entries; + u32 remote_node_entries; + u32 task_context_entries; + struct sci_unsolicited_frame_control uf_control; + + /* phy startup */ + struct sci_timer phy_timer; + /* XXX kill */ + bool phy_startup_timer_pending; + u32 next_phy_to_start; + /* XXX convert to unsigned long and use bitops */ + u8 invalid_phy_mask; + + /* TODO attempt dynamic interrupt coalescing scheme */ + u16 interrupt_coalesce_number; + u32 interrupt_coalesce_timeout; + struct smu_registers __iomem *smu_registers; + struct scu_registers __iomem *scu_registers; + + u16 tci_head; + u16 tci_tail; + u16 tci_pool[SCI_MAX_IO_REQUESTS]; + + int id; /* unique within a given pci device */ + struct isci_phy phys[SCI_MAX_PHYS]; + struct isci_port ports[SCI_MAX_PORTS + 1]; /* includes dummy port */ + struct sas_ha_struct sas_ha; + + spinlock_t state_lock; + struct pci_dev *pdev; + enum isci_status status; + #define IHOST_START_PENDING 0 + #define IHOST_STOP_PENDING 1 + unsigned long flags; + wait_queue_head_t eventq; + struct Scsi_Host *shost; + struct tasklet_struct completion_tasklet; + struct list_head requests_to_complete; + struct list_head requests_to_errorback; + spinlock_t scic_lock; + struct isci_request *reqs[SCI_MAX_IO_REQUESTS]; + struct isci_remote_device devices[SCI_MAX_REMOTE_DEVICES]; +}; + +/** + * enum sci_controller_states - This enumeration depicts all the states + * for the common controller state machine. + */ +enum sci_controller_states { + /** + * Simply the initial state for the base controller state machine. + */ + SCIC_INITIAL = 0, + + /** + * This state indicates that the controller is reset. The memory for + * the controller is in it's initial state, but the controller requires + * initialization. + * This state is entered from the INITIAL state. + * This state is entered from the RESETTING state. + */ + SCIC_RESET, + + /** + * This state is typically an action state that indicates the controller + * is in the process of initialization. In this state no new IO operations + * are permitted. + * This state is entered from the RESET state. + */ + SCIC_INITIALIZING, + + /** + * This state indicates that the controller has been successfully + * initialized. In this state no new IO operations are permitted. + * This state is entered from the INITIALIZING state. + */ + SCIC_INITIALIZED, + + /** + * This state indicates the the controller is in the process of becoming + * ready (i.e. starting). In this state no new IO operations are permitted. + * This state is entered from the INITIALIZED state. + */ + SCIC_STARTING, + + /** + * This state indicates the controller is now ready. Thus, the user + * is able to perform IO operations on the controller. + * This state is entered from the STARTING state. + */ + SCIC_READY, + + /** + * This state is typically an action state that indicates the controller + * is in the process of resetting. Thus, the user is unable to perform + * IO operations on the controller. A reset is considered destructive in + * most cases. + * This state is entered from the READY state. + * This state is entered from the FAILED state. + * This state is entered from the STOPPED state. + */ + SCIC_RESETTING, + + /** + * This state indicates that the controller is in the process of stopping. + * In this state no new IO operations are permitted, but existing IO + * operations are allowed to complete. + * This state is entered from the READY state. + */ + SCIC_STOPPING, + + /** + * This state indicates that the controller has successfully been stopped. + * In this state no new IO operations are permitted. + * This state is entered from the STOPPING state. + */ + SCIC_STOPPED, + + /** + * This state indicates that the controller could not successfully be + * initialized. In this state no new IO operations are permitted. + * This state is entered from the INITIALIZING state. + * This state is entered from the STARTING state. + * This state is entered from the STOPPING state. + * This state is entered from the RESETTING state. + */ + SCIC_FAILED, +}; + +/** + * struct isci_pci_info - This class represents the pci function containing the + * controllers. Depending on PCI SKU, there could be up to 2 controllers in + * the PCI function. + */ +#define SCI_MAX_MSIX_INT (SCI_NUM_MSI_X_INT*SCI_MAX_CONTROLLERS) + +struct isci_pci_info { + struct msix_entry msix_entries[SCI_MAX_MSIX_INT]; + struct isci_host *hosts[SCI_MAX_CONTROLLERS]; + struct isci_orom *orom; +}; + +static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev) +{ + return pci_get_drvdata(pdev); +} + +#define for_each_isci_host(id, ihost, pdev) \ + for (id = 0, ihost = to_pci_info(pdev)->hosts[id]; \ + id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \ + ihost = to_pci_info(pdev)->hosts[++id]) + +static inline enum isci_status isci_host_get_state(struct isci_host *isci_host) +{ + return isci_host->status; +} + +static inline void isci_host_change_state(struct isci_host *isci_host, + enum isci_status status) +{ + unsigned long flags; + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_host = %p, state = 0x%x", + __func__, + isci_host, + status); + spin_lock_irqsave(&isci_host->state_lock, flags); + isci_host->status = status; + spin_unlock_irqrestore(&isci_host->state_lock, flags); + +} + +static inline void wait_for_start(struct isci_host *ihost) +{ + wait_event(ihost->eventq, !test_bit(IHOST_START_PENDING, &ihost->flags)); +} + +static inline void wait_for_stop(struct isci_host *ihost) +{ + wait_event(ihost->eventq, !test_bit(IHOST_STOP_PENDING, &ihost->flags)); +} + +static inline void wait_for_device_start(struct isci_host *ihost, struct isci_remote_device *idev) +{ + wait_event(ihost->eventq, !test_bit(IDEV_START_PENDING, &idev->flags)); +} + +static inline void wait_for_device_stop(struct isci_host *ihost, struct isci_remote_device *idev) +{ + wait_event(ihost->eventq, !test_bit(IDEV_STOP_PENDING, &idev->flags)); +} + +static inline struct isci_host *dev_to_ihost(struct domain_device *dev) +{ + return dev->port->ha->lldd_ha; +} + +/* we always use protocol engine group zero */ +#define ISCI_PEG 0 + +/* see sci_controller_io_tag_allocate|free for how seq and tci are built */ +#define ISCI_TAG(seq, tci) (((u16) (seq)) << 12 | tci) + +/* these are returned by the hardware, so sanitize them */ +#define ISCI_TAG_SEQ(tag) (((tag) >> 12) & (SCI_MAX_SEQ-1)) +#define ISCI_TAG_TCI(tag) ((tag) & (SCI_MAX_IO_REQUESTS-1)) + +/* expander attached sata devices require 3 rnc slots */ +static inline int sci_remote_device_node_count(struct isci_remote_device *idev) +{ + struct domain_device *dev = idev->domain_dev; + + if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) && + !idev->is_direct_attached) + return SCU_STP_REMOTE_NODE_COUNT; + return SCU_SSP_REMOTE_NODE_COUNT; +} + +/** + * sci_controller_clear_invalid_phy() - + * + * This macro will clear the bit in the invalid phy mask for this controller + * object. This is used to control messages reported for invalid link up + * notifications. + */ +#define sci_controller_clear_invalid_phy(controller, phy) \ + ((controller)->invalid_phy_mask &= ~(1 << (phy)->phy_index)) + +static inline struct device *sciphy_to_dev(struct isci_phy *iphy) +{ + + if (!iphy || !iphy->isci_port || !iphy->isci_port->isci_host) + return NULL; + + return &iphy->isci_port->isci_host->pdev->dev; +} + +static inline struct device *sciport_to_dev(struct isci_port *iport) +{ + + if (!iport || !iport->isci_host) + return NULL; + + return &iport->isci_host->pdev->dev; +} + +static inline struct device *scirdev_to_dev(struct isci_remote_device *idev) +{ + if (!idev || !idev->isci_port || !idev->isci_port->isci_host) + return NULL; + + return &idev->isci_port->isci_host->pdev->dev; +} + +static inline bool is_a2(struct pci_dev *pdev) +{ + if (pdev->revision < 4) + return true; + return false; +} + +static inline bool is_b0(struct pci_dev *pdev) +{ + if (pdev->revision == 4) + return true; + return false; +} + +static inline bool is_c0(struct pci_dev *pdev) +{ + if (pdev->revision >= 5) + return true; + return false; +} + +void sci_controller_post_request(struct isci_host *ihost, + u32 request); +void sci_controller_release_frame(struct isci_host *ihost, + u32 frame_index); +void sci_controller_copy_sata_response(void *response_buffer, + void *frame_header, + void *frame_buffer); +enum sci_status sci_controller_allocate_remote_node_context(struct isci_host *ihost, + struct isci_remote_device *idev, + u16 *node_id); +void sci_controller_free_remote_node_context( + struct isci_host *ihost, + struct isci_remote_device *idev, + u16 node_id); + +struct isci_request *sci_request_by_tag(struct isci_host *ihost, + u16 io_tag); + +void sci_controller_power_control_queue_insert( + struct isci_host *ihost, + struct isci_phy *iphy); + +void sci_controller_power_control_queue_remove( + struct isci_host *ihost, + struct isci_phy *iphy); + +void sci_controller_link_up( + struct isci_host *ihost, + struct isci_port *iport, + struct isci_phy *iphy); + +void sci_controller_link_down( + struct isci_host *ihost, + struct isci_port *iport, + struct isci_phy *iphy); + +void sci_controller_remote_device_stopped( + struct isci_host *ihost, + struct isci_remote_device *idev); + +void sci_controller_copy_task_context( + struct isci_host *ihost, + struct isci_request *ireq); + +void sci_controller_register_setup(struct isci_host *ihost); + +enum sci_status sci_controller_continue_io(struct isci_request *ireq); +int isci_host_scan_finished(struct Scsi_Host *, unsigned long); +void isci_host_scan_start(struct Scsi_Host *); +u16 isci_alloc_tag(struct isci_host *ihost); +enum sci_status isci_free_tag(struct isci_host *ihost, u16 io_tag); +void isci_tci_free(struct isci_host *ihost, u16 tci); + +int isci_host_init(struct isci_host *); + +void isci_host_init_controller_names( + struct isci_host *isci_host, + unsigned int controller_idx); + +void isci_host_deinit( + struct isci_host *); + +void isci_host_port_link_up( + struct isci_host *, + struct isci_port *, + struct isci_phy *); +int isci_host_dev_found(struct domain_device *); + +void isci_host_remote_device_start_complete( + struct isci_host *, + struct isci_remote_device *, + enum sci_status); + +void sci_controller_disable_interrupts( + struct isci_host *ihost); + +enum sci_status sci_controller_start_io( + struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sci_task_status sci_controller_start_task( + struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sci_status sci_controller_terminate_request( + struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sci_status sci_controller_complete_io( + struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq); + +void sci_port_configuration_agent_construct( + struct sci_port_configuration_agent *port_agent); + +enum sci_status sci_port_configuration_agent_initialize( + struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent); +#endif diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c new file mode 100644 index 000000000000..61e0d09e2b57 --- /dev/null +++ b/drivers/scsi/isci/init.c @@ -0,0 +1,565 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/firmware.h> +#include <linux/efi.h> +#include <asm/string.h> +#include "isci.h" +#include "task.h" +#include "probe_roms.h" + +static struct scsi_transport_template *isci_transport_template; + +static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = { + { PCI_VDEVICE(INTEL, 0x1D61),}, + { PCI_VDEVICE(INTEL, 0x1D63),}, + { PCI_VDEVICE(INTEL, 0x1D65),}, + { PCI_VDEVICE(INTEL, 0x1D67),}, + { PCI_VDEVICE(INTEL, 0x1D69),}, + { PCI_VDEVICE(INTEL, 0x1D6B),}, + { PCI_VDEVICE(INTEL, 0x1D60),}, + { PCI_VDEVICE(INTEL, 0x1D62),}, + { PCI_VDEVICE(INTEL, 0x1D64),}, + { PCI_VDEVICE(INTEL, 0x1D66),}, + { PCI_VDEVICE(INTEL, 0x1D68),}, + { PCI_VDEVICE(INTEL, 0x1D6A),}, + {} +}; + +MODULE_DEVICE_TABLE(pci, isci_id_table); + +/* linux isci specific settings */ + +unsigned char no_outbound_task_to = 20; +module_param(no_outbound_task_to, byte, 0); +MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)"); + +u16 ssp_max_occ_to = 20; +module_param(ssp_max_occ_to, ushort, 0); +MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)"); + +u16 stp_max_occ_to = 5; +module_param(stp_max_occ_to, ushort, 0); +MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)"); + +u16 ssp_inactive_to = 5; +module_param(ssp_inactive_to, ushort, 0); +MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)"); + +u16 stp_inactive_to = 5; +module_param(stp_inactive_to, ushort, 0); +MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)"); + +unsigned char phy_gen = 3; +module_param(phy_gen, byte, 0); +MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)"); + +unsigned char max_concurr_spinup = 1; +module_param(max_concurr_spinup, byte, 0); +MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup"); + +static struct scsi_host_template isci_sht = { + + .module = THIS_MODULE, + .name = DRV_NAME, + .proc_name = DRV_NAME, + .queuecommand = sas_queuecommand, + .target_alloc = sas_target_alloc, + .slave_configure = sas_slave_configure, + .slave_destroy = sas_slave_destroy, + .scan_finished = isci_host_scan_finished, + .scan_start = isci_host_scan_start, + .change_queue_depth = sas_change_queue_depth, + .change_queue_type = sas_change_queue_type, + .bios_param = sas_bios_param, + .can_queue = ISCI_CAN_QUEUE_VAL, + .cmd_per_lun = 1, + .this_id = -1, + .sg_tablesize = SG_ALL, + .max_sectors = SCSI_DEFAULT_MAX_SECTORS, + .use_clustering = ENABLE_CLUSTERING, + .eh_device_reset_handler = sas_eh_device_reset_handler, + .eh_bus_reset_handler = isci_bus_reset_handler, + .slave_alloc = sas_slave_alloc, + .target_destroy = sas_target_destroy, + .ioctl = sas_ioctl, +}; + +static struct sas_domain_function_template isci_transport_ops = { + + /* The class calls these to notify the LLDD of an event. */ + .lldd_port_formed = isci_port_formed, + .lldd_port_deformed = isci_port_deformed, + + /* The class calls these when a device is found or gone. */ + .lldd_dev_found = isci_remote_device_found, + .lldd_dev_gone = isci_remote_device_gone, + + .lldd_execute_task = isci_task_execute_task, + /* Task Management Functions. Must be called from process context. */ + .lldd_abort_task = isci_task_abort_task, + .lldd_abort_task_set = isci_task_abort_task_set, + .lldd_clear_aca = isci_task_clear_aca, + .lldd_clear_task_set = isci_task_clear_task_set, + .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset, + .lldd_lu_reset = isci_task_lu_reset, + .lldd_query_task = isci_task_query_task, + + /* Port and Adapter management */ + .lldd_clear_nexus_port = isci_task_clear_nexus_port, + .lldd_clear_nexus_ha = isci_task_clear_nexus_ha, + + /* Phy management */ + .lldd_control_phy = isci_phy_control, +}; + + +/****************************************************************************** +* P R O T E C T E D M E T H O D S +******************************************************************************/ + + + +/** + * isci_register_sas_ha() - This method initializes various lldd + * specific members of the sas_ha struct and calls the libsas + * sas_register_ha() function. + * @isci_host: This parameter specifies the lldd specific wrapper for the + * libsas sas_ha struct. + * + * This method returns an error code indicating sucess or failure. The user + * should check for possible memory allocation error return otherwise, a zero + * indicates success. + */ +static int isci_register_sas_ha(struct isci_host *isci_host) +{ + int i; + struct sas_ha_struct *sas_ha = &(isci_host->sas_ha); + struct asd_sas_phy **sas_phys; + struct asd_sas_port **sas_ports; + + sas_phys = devm_kzalloc(&isci_host->pdev->dev, + SCI_MAX_PHYS * sizeof(void *), + GFP_KERNEL); + if (!sas_phys) + return -ENOMEM; + + sas_ports = devm_kzalloc(&isci_host->pdev->dev, + SCI_MAX_PORTS * sizeof(void *), + GFP_KERNEL); + if (!sas_ports) + return -ENOMEM; + + /*----------------- Libsas Initialization Stuff---------------------- + * Set various fields in the sas_ha struct: + */ + + sas_ha->sas_ha_name = DRV_NAME; + sas_ha->lldd_module = THIS_MODULE; + sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0]; + + /* set the array of phy and port structs. */ + for (i = 0; i < SCI_MAX_PHYS; i++) { + sas_phys[i] = &isci_host->phys[i].sas_phy; + sas_ports[i] = &isci_host->ports[i].sas_port; + } + + sas_ha->sas_phy = sas_phys; + sas_ha->sas_port = sas_ports; + sas_ha->num_phys = SCI_MAX_PHYS; + + sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL; + sas_ha->lldd_max_execute_num = 1; + sas_ha->strict_wide_ports = 1; + + sas_register_ha(sas_ha); + + return 0; +} + +static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev); + struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); + struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha); + + return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id); +} + +static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL); + +static void isci_unregister(struct isci_host *isci_host) +{ + struct Scsi_Host *shost; + + if (!isci_host) + return; + + shost = isci_host->shost; + device_remove_file(&shost->shost_dev, &dev_attr_isci_id); + + sas_unregister_ha(&isci_host->sas_ha); + + sas_remove_host(isci_host->shost); + scsi_remove_host(isci_host->shost); + scsi_host_put(isci_host->shost); +} + +static int __devinit isci_pci_init(struct pci_dev *pdev) +{ + int err, bar_num, bar_mask = 0; + void __iomem * const *iomap; + + err = pcim_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, + "failed enable PCI device %s!\n", + pci_name(pdev)); + return err; + } + + for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++) + bar_mask |= 1 << (bar_num * 2); + + err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME); + if (err) + return err; + + iomap = pcim_iomap_table(pdev); + if (!iomap) + return -ENOMEM; + + pci_set_master(pdev); + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) + return err; + } + + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); + if (err) { + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) + return err; + } + + return 0; +} + +static int num_controllers(struct pci_dev *pdev) +{ + /* bar size alone can tell us if we are running with a dual controller + * part, no need to trust revision ids that might be under broken firmware + * control + */ + resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); + resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); + + if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && + smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) + return SCI_MAX_CONTROLLERS; + else + return 1; +} + +static int isci_setup_interrupts(struct pci_dev *pdev) +{ + int err, i, num_msix; + struct isci_host *ihost; + struct isci_pci_info *pci_info = to_pci_info(pdev); + + /* + * Determine the number of vectors associated with this + * PCI function. + */ + num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; + + for (i = 0; i < num_msix; i++) + pci_info->msix_entries[i].entry = i; + + err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix); + if (err) + goto intx; + + for (i = 0; i < num_msix; i++) { + int id = i / SCI_NUM_MSI_X_INT; + struct msix_entry *msix = &pci_info->msix_entries[i]; + irq_handler_t isr; + + ihost = pci_info->hosts[id]; + /* odd numbered vectors are error interrupts */ + if (i & 1) + isr = isci_error_isr; + else + isr = isci_msix_isr; + + err = devm_request_irq(&pdev->dev, msix->vector, isr, 0, + DRV_NAME"-msix", ihost); + if (!err) + continue; + + dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); + while (i--) { + id = i / SCI_NUM_MSI_X_INT; + ihost = pci_info->hosts[id]; + msix = &pci_info->msix_entries[i]; + devm_free_irq(&pdev->dev, msix->vector, ihost); + } + pci_disable_msix(pdev); + goto intx; + } + return 0; + + intx: + for_each_isci_host(i, ihost, pdev) { + err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, + IRQF_SHARED, DRV_NAME"-intx", ihost); + if (err) + break; + } + return err; +} + +static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) +{ + struct isci_host *isci_host; + struct Scsi_Host *shost; + int err; + + isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host), GFP_KERNEL); + if (!isci_host) + return NULL; + + isci_host->pdev = pdev; + isci_host->id = id; + + shost = scsi_host_alloc(&isci_sht, sizeof(void *)); + if (!shost) + return NULL; + isci_host->shost = shost; + + err = isci_host_init(isci_host); + if (err) + goto err_shost; + + SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha; + isci_host->sas_ha.core.shost = shost; + shost->transportt = isci_transport_template; + + shost->max_id = ~0; + shost->max_lun = ~0; + shost->max_cmd_len = MAX_COMMAND_SIZE; + + err = scsi_add_host(shost, &pdev->dev); + if (err) + goto err_shost; + + err = isci_register_sas_ha(isci_host); + if (err) + goto err_shost_remove; + + err = device_create_file(&shost->shost_dev, &dev_attr_isci_id); + if (err) + goto err_unregister_ha; + + return isci_host; + + err_unregister_ha: + sas_unregister_ha(&(isci_host->sas_ha)); + err_shost_remove: + scsi_remove_host(shost); + err_shost: + scsi_host_put(shost); + + return NULL; +} + +static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct isci_pci_info *pci_info; + int err, i; + struct isci_host *isci_host; + const struct firmware *fw = NULL; + struct isci_orom *orom = NULL; + char *source = "(platform)"; + + dev_info(&pdev->dev, "driver configured for rev: %d silicon\n", + pdev->revision); + + pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); + if (!pci_info) + return -ENOMEM; + pci_set_drvdata(pdev, pci_info); + + if (efi_enabled) + orom = isci_get_efi_var(pdev); + + if (!orom) + orom = isci_request_oprom(pdev); + + for (i = 0; orom && i < ARRAY_SIZE(orom->ctrl); i++) { + if (sci_oem_parameters_validate(&orom->ctrl[i])) { + dev_warn(&pdev->dev, + "[%d]: invalid oem parameters detected, falling back to firmware\n", i); + devm_kfree(&pdev->dev, orom); + orom = NULL; + break; + } + } + + if (!orom) { + source = "(firmware)"; + orom = isci_request_firmware(pdev, fw); + if (!orom) { + /* TODO convert this to WARN_TAINT_ONCE once the + * orom/efi parameter support is widely available + */ + dev_warn(&pdev->dev, + "Loading user firmware failed, using default " + "values\n"); + dev_warn(&pdev->dev, + "Default OEM configuration being used: 4 " + "narrow ports, and default SAS Addresses\n"); + } + } + + if (orom) + dev_info(&pdev->dev, + "OEM SAS parameters (version: %u.%u) loaded %s\n", + (orom->hdr.version & 0xf0) >> 4, + (orom->hdr.version & 0xf), source); + + pci_info->orom = orom; + + err = isci_pci_init(pdev); + if (err) + return err; + + for (i = 0; i < num_controllers(pdev); i++) { + struct isci_host *h = isci_host_alloc(pdev, i); + + if (!h) { + err = -ENOMEM; + goto err_host_alloc; + } + pci_info->hosts[i] = h; + } + + err = isci_setup_interrupts(pdev); + if (err) + goto err_host_alloc; + + for_each_isci_host(i, isci_host, pdev) + scsi_scan_host(isci_host->shost); + + return 0; + + err_host_alloc: + for_each_isci_host(i, isci_host, pdev) + isci_unregister(isci_host); + return err; +} + +static void __devexit isci_pci_remove(struct pci_dev *pdev) +{ + struct isci_host *ihost; + int i; + + for_each_isci_host(i, ihost, pdev) { + isci_unregister(ihost); + isci_host_deinit(ihost); + sci_controller_disable_interrupts(ihost); + } +} + +static struct pci_driver isci_pci_driver = { + .name = DRV_NAME, + .id_table = isci_id_table, + .probe = isci_pci_probe, + .remove = __devexit_p(isci_pci_remove), +}; + +static __init int isci_init(void) +{ + int err; + + pr_info("%s: Intel(R) C600 SAS Controller Driver\n", DRV_NAME); + + isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); + if (!isci_transport_template) + return -ENOMEM; + + err = pci_register_driver(&isci_pci_driver); + if (err) + sas_release_transport(isci_transport_template); + + return err; +} + +static __exit void isci_exit(void) +{ + pci_unregister_driver(&isci_pci_driver); + sas_release_transport(isci_transport_template); +} + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_FIRMWARE(ISCI_FW_NAME); +module_init(isci_init); +module_exit(isci_exit); diff --git a/drivers/scsi/isci/isci.h b/drivers/scsi/isci/isci.h new file mode 100644 index 000000000000..d1de63312e7f --- /dev/null +++ b/drivers/scsi/isci/isci.h @@ -0,0 +1,538 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __ISCI_H__ +#define __ISCI_H__ + +#include <linux/interrupt.h> +#include <linux/types.h> + +#define DRV_NAME "isci" +#define SCI_PCI_BAR_COUNT 2 +#define SCI_NUM_MSI_X_INT 2 +#define SCI_SMU_BAR 0 +#define SCI_SMU_BAR_SIZE (16*1024) +#define SCI_SCU_BAR 1 +#define SCI_SCU_BAR_SIZE (4*1024*1024) +#define SCI_IO_SPACE_BAR0 2 +#define SCI_IO_SPACE_BAR1 3 +#define ISCI_CAN_QUEUE_VAL 250 /* < SCI_MAX_IO_REQUESTS ? */ +#define SCIC_CONTROLLER_STOP_TIMEOUT 5000 + +#define SCI_CONTROLLER_INVALID_IO_TAG 0xFFFF + +#define SCI_MAX_PHYS (4UL) +#define SCI_MAX_PORTS SCI_MAX_PHYS +#define SCI_MAX_SMP_PHYS (384) /* not silicon constrained */ +#define SCI_MAX_REMOTE_DEVICES (256UL) +#define SCI_MAX_IO_REQUESTS (256UL) +#define SCI_MAX_SEQ (16) +#define SCI_MAX_MSIX_MESSAGES (2) +#define SCI_MAX_SCATTER_GATHER_ELEMENTS 130 /* not silicon constrained */ +#define SCI_MAX_CONTROLLERS 2 +#define SCI_MAX_DOMAINS SCI_MAX_PORTS + +#define SCU_MAX_CRITICAL_NOTIFICATIONS (384) +#define SCU_MAX_EVENTS_SHIFT (7) +#define SCU_MAX_EVENTS (1 << SCU_MAX_EVENTS_SHIFT) +#define SCU_MAX_UNSOLICITED_FRAMES (128) +#define SCU_MAX_COMPLETION_QUEUE_SCRATCH (128) +#define SCU_MAX_COMPLETION_QUEUE_ENTRIES (SCU_MAX_CRITICAL_NOTIFICATIONS \ + + SCU_MAX_EVENTS \ + + SCU_MAX_UNSOLICITED_FRAMES \ + + SCI_MAX_IO_REQUESTS \ + + SCU_MAX_COMPLETION_QUEUE_SCRATCH) +#define SCU_MAX_COMPLETION_QUEUE_SHIFT (ilog2(SCU_MAX_COMPLETION_QUEUE_ENTRIES)) + +#define SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES (4096) +#define SCU_UNSOLICITED_FRAME_BUFFER_SIZE (1024) +#define SCU_INVALID_FRAME_INDEX (0xFFFF) + +#define SCU_IO_REQUEST_MAX_SGE_SIZE (0x00FFFFFF) +#define SCU_IO_REQUEST_MAX_TRANSFER_LENGTH (0x00FFFFFF) + +static inline void check_sizes(void) +{ + BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_EVENTS); + BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES <= 8); + BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_UNSOLICITED_FRAMES); + BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_COMPLETION_QUEUE_ENTRIES); + BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES > SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES); + BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_IO_REQUESTS); + BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_SEQ); +} + +/** + * enum sci_status - This is the general return status enumeration for non-IO, + * non-task management related SCI interface methods. + * + * + */ +enum sci_status { + /** + * This member indicates successful completion. + */ + SCI_SUCCESS = 0, + + /** + * This value indicates that the calling method completed successfully, + * but that the IO may have completed before having it's start method + * invoked. This occurs during SAT translation for requests that do + * not require an IO to the target or for any other requests that may + * be completed without having to submit IO. + */ + SCI_SUCCESS_IO_COMPLETE_BEFORE_START, + + /** + * This Value indicates that the SCU hardware returned an early response + * because the io request specified more data than is returned by the + * target device (mode pages, inquiry data, etc.). The completion routine + * will handle this case to get the actual number of bytes transferred. + */ + SCI_SUCCESS_IO_DONE_EARLY, + + /** + * This member indicates that the object for which a state change is + * being requested is already in said state. + */ + SCI_WARNING_ALREADY_IN_STATE, + + /** + * This member indicates interrupt coalescence timer may cause SAS + * specification compliance issues (i.e. SMP target mode response + * frames must be returned within 1.9 milliseconds). + */ + SCI_WARNING_TIMER_CONFLICT, + + /** + * This field indicates a sequence of action is not completed yet. Mostly, + * this status is used when multiple ATA commands are needed in a SATI translation. + */ + SCI_WARNING_SEQUENCE_INCOMPLETE, + + /** + * This member indicates that there was a general failure. + */ + SCI_FAILURE, + + /** + * This member indicates that the SCI implementation is unable to complete + * an operation due to a critical flaw the prevents any further operation + * (i.e. an invalid pointer). + */ + SCI_FATAL_ERROR, + + /** + * This member indicates the calling function failed, because the state + * of the controller is in a state that prevents successful completion. + */ + SCI_FAILURE_INVALID_STATE, + + /** + * This member indicates the calling function failed, because there is + * insufficient resources/memory to complete the request. + */ + SCI_FAILURE_INSUFFICIENT_RESOURCES, + + /** + * This member indicates the calling function failed, because the + * controller object required for the operation can't be located. + */ + SCI_FAILURE_CONTROLLER_NOT_FOUND, + + /** + * This member indicates the calling function failed, because the + * discovered controller type is not supported by the library. + */ + SCI_FAILURE_UNSUPPORTED_CONTROLLER_TYPE, + + /** + * This member indicates the calling function failed, because the + * requested initialization data version isn't supported. + */ + SCI_FAILURE_UNSUPPORTED_INIT_DATA_VERSION, + + /** + * This member indicates the calling function failed, because the + * requested configuration of SAS Phys into SAS Ports is not supported. + */ + SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION, + + /** + * This member indicates the calling function failed, because the + * requested protocol is not supported by the remote device, port, + * or controller. + */ + SCI_FAILURE_UNSUPPORTED_PROTOCOL, + + /** + * This member indicates the calling function failed, because the + * requested information type is not supported by the SCI implementation. + */ + SCI_FAILURE_UNSUPPORTED_INFORMATION_TYPE, + + /** + * This member indicates the calling function failed, because the + * device already exists. + */ + SCI_FAILURE_DEVICE_EXISTS, + + /** + * This member indicates the calling function failed, because adding + * a phy to the object is not possible. + */ + SCI_FAILURE_ADDING_PHY_UNSUPPORTED, + + /** + * This member indicates the calling function failed, because the + * requested information type is not supported by the SCI implementation. + */ + SCI_FAILURE_UNSUPPORTED_INFORMATION_FIELD, + + /** + * This member indicates the calling function failed, because the SCI + * implementation does not support the supplied time limit. + */ + SCI_FAILURE_UNSUPPORTED_TIME_LIMIT, + + /** + * This member indicates the calling method failed, because the SCI + * implementation does not contain the specified Phy. + */ + SCI_FAILURE_INVALID_PHY, + + /** + * This member indicates the calling method failed, because the SCI + * implementation does not contain the specified Port. + */ + SCI_FAILURE_INVALID_PORT, + + /** + * This member indicates the calling method was partly successful + * The port was reset but not all phys in port are operational + */ + SCI_FAILURE_RESET_PORT_PARTIAL_SUCCESS, + + /** + * This member indicates that calling method failed + * The port reset did not complete because none of the phys are operational + */ + SCI_FAILURE_RESET_PORT_FAILURE, + + /** + * This member indicates the calling method failed, because the SCI + * implementation does not contain the specified remote device. + */ + SCI_FAILURE_INVALID_REMOTE_DEVICE, + + /** + * This member indicates the calling method failed, because the remote + * device is in a bad state and requires a reset. + */ + SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED, + + /** + * This member indicates the calling method failed, because the SCI + * implementation does not contain or support the specified IO tag. + */ + SCI_FAILURE_INVALID_IO_TAG, + + /** + * This member indicates that the operation failed and the user should + * check the response data associated with the IO. + */ + SCI_FAILURE_IO_RESPONSE_VALID, + + /** + * This member indicates that the operation failed, the failure is + * controller implementation specific, and the response data associated + * with the request is not valid. You can query for the controller + * specific error information via sci_controller_get_request_status() + */ + SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR, + + /** + * This member indicated that the operation failed because the + * user requested this IO to be terminated. + */ + SCI_FAILURE_IO_TERMINATED, + + /** + * This member indicates that the operation failed and the associated + * request requires a SCSI abort task to be sent to the target. + */ + SCI_FAILURE_IO_REQUIRES_SCSI_ABORT, + + /** + * This member indicates that the operation failed because the supplied + * device could not be located. + */ + SCI_FAILURE_DEVICE_NOT_FOUND, + + /** + * This member indicates that the operation failed because the + * objects association is required and is not correctly set. + */ + SCI_FAILURE_INVALID_ASSOCIATION, + + /** + * This member indicates that the operation failed, because a timeout + * occurred. + */ + SCI_FAILURE_TIMEOUT, + + /** + * This member indicates that the operation failed, because the user + * specified a value that is either invalid or not supported. + */ + SCI_FAILURE_INVALID_PARAMETER_VALUE, + + /** + * This value indicates that the operation failed, because the number + * of messages (MSI-X) is not supported. + */ + SCI_FAILURE_UNSUPPORTED_MESSAGE_COUNT, + + /** + * This value indicates that the method failed due to a lack of + * available NCQ tags. + */ + SCI_FAILURE_NO_NCQ_TAG_AVAILABLE, + + /** + * This value indicates that a protocol violation has occurred on the + * link. + */ + SCI_FAILURE_PROTOCOL_VIOLATION, + + /** + * This value indicates a failure condition that retry may help to clear. + */ + SCI_FAILURE_RETRY_REQUIRED, + + /** + * This field indicates the retry limit was reached when a retry is attempted + */ + SCI_FAILURE_RETRY_LIMIT_REACHED, + + /** + * This member indicates the calling method was partly successful. + * Mostly, this status is used when a LUN_RESET issued to an expander attached + * STP device in READY NCQ substate needs to have RNC suspended/resumed + * before posting TC. + */ + SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS, + + /** + * This field indicates an illegal phy connection based on the routing attribute + * of both expander phy attached to each other. + */ + SCI_FAILURE_ILLEGAL_ROUTING_ATTRIBUTE_CONFIGURATION, + + /** + * This field indicates a CONFIG ROUTE INFO command has a response with function result + * INDEX DOES NOT EXIST, usually means exceeding max route index. + */ + SCI_FAILURE_EXCEED_MAX_ROUTE_INDEX, + + /** + * This value indicates that an unsupported PCI device ID has been + * specified. This indicates that attempts to invoke + * sci_library_allocate_controller() will fail. + */ + SCI_FAILURE_UNSUPPORTED_PCI_DEVICE_ID + +}; + +/** + * enum sci_io_status - This enumeration depicts all of the possible IO + * completion status values. Each value in this enumeration maps directly + * to a value in the enum sci_status enumeration. Please refer to that + * enumeration for detailed comments concerning what the status represents. + * + * Add the API to retrieve the SCU status from the core. Check to see that the + * following status are properly handled: - SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL + * - SCI_IO_FAILURE_INVALID_IO_TAG + */ +enum sci_io_status { + SCI_IO_SUCCESS = SCI_SUCCESS, + SCI_IO_FAILURE = SCI_FAILURE, + SCI_IO_SUCCESS_COMPLETE_BEFORE_START = SCI_SUCCESS_IO_COMPLETE_BEFORE_START, + SCI_IO_SUCCESS_IO_DONE_EARLY = SCI_SUCCESS_IO_DONE_EARLY, + SCI_IO_FAILURE_INVALID_STATE = SCI_FAILURE_INVALID_STATE, + SCI_IO_FAILURE_INSUFFICIENT_RESOURCES = SCI_FAILURE_INSUFFICIENT_RESOURCES, + SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL = SCI_FAILURE_UNSUPPORTED_PROTOCOL, + SCI_IO_FAILURE_RESPONSE_VALID = SCI_FAILURE_IO_RESPONSE_VALID, + SCI_IO_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR, + SCI_IO_FAILURE_TERMINATED = SCI_FAILURE_IO_TERMINATED, + SCI_IO_FAILURE_REQUIRES_SCSI_ABORT = SCI_FAILURE_IO_REQUIRES_SCSI_ABORT, + SCI_IO_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE, + SCI_IO_FAILURE_NO_NCQ_TAG_AVAILABLE = SCI_FAILURE_NO_NCQ_TAG_AVAILABLE, + SCI_IO_FAILURE_PROTOCOL_VIOLATION = SCI_FAILURE_PROTOCOL_VIOLATION, + + SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED, + + SCI_IO_FAILURE_RETRY_REQUIRED = SCI_FAILURE_RETRY_REQUIRED, + SCI_IO_FAILURE_RETRY_LIMIT_REACHED = SCI_FAILURE_RETRY_LIMIT_REACHED, + SCI_IO_FAILURE_INVALID_REMOTE_DEVICE = SCI_FAILURE_INVALID_REMOTE_DEVICE +}; + +/** + * enum sci_task_status - This enumeration depicts all of the possible task + * completion status values. Each value in this enumeration maps directly + * to a value in the enum sci_status enumeration. Please refer to that + * enumeration for detailed comments concerning what the status represents. + * + * Check to see that the following status are properly handled: + */ +enum sci_task_status { + SCI_TASK_SUCCESS = SCI_SUCCESS, + SCI_TASK_FAILURE = SCI_FAILURE, + SCI_TASK_FAILURE_INVALID_STATE = SCI_FAILURE_INVALID_STATE, + SCI_TASK_FAILURE_INSUFFICIENT_RESOURCES = SCI_FAILURE_INSUFFICIENT_RESOURCES, + SCI_TASK_FAILURE_UNSUPPORTED_PROTOCOL = SCI_FAILURE_UNSUPPORTED_PROTOCOL, + SCI_TASK_FAILURE_INVALID_TAG = SCI_FAILURE_INVALID_IO_TAG, + SCI_TASK_FAILURE_RESPONSE_VALID = SCI_FAILURE_IO_RESPONSE_VALID, + SCI_TASK_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR, + SCI_TASK_FAILURE_TERMINATED = SCI_FAILURE_IO_TERMINATED, + SCI_TASK_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE, + + SCI_TASK_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED, + SCI_TASK_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS = SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS + +}; + +/** + * sci_swab32_cpy - convert between scsi and scu-hardware byte format + * @dest: receive the 4-byte endian swapped version of src + * @src: word aligned source buffer + * + * scu hardware handles SSP/SMP control, response, and unidentified + * frames in "big endian dword" order. Regardless of host endian this + * is always a swab32()-per-dword conversion of the standard definition, + * i.e. single byte fields swapped and multi-byte fields in little- + * endian + */ +static inline void sci_swab32_cpy(void *_dest, void *_src, ssize_t word_cnt) +{ + u32 *dest = _dest, *src = _src; + + while (--word_cnt >= 0) + dest[word_cnt] = swab32(src[word_cnt]); +} + +extern unsigned char no_outbound_task_to; +extern u16 ssp_max_occ_to; +extern u16 stp_max_occ_to; +extern u16 ssp_inactive_to; +extern u16 stp_inactive_to; +extern unsigned char phy_gen; +extern unsigned char max_concurr_spinup; + +irqreturn_t isci_msix_isr(int vec, void *data); +irqreturn_t isci_intx_isr(int vec, void *data); +irqreturn_t isci_error_isr(int vec, void *data); + +/* + * Each timer is associated with a cancellation flag that is set when + * del_timer() is called and checked in the timer callback function. This + * is needed since del_timer_sync() cannot be called with sci_lock held. + * For deinit however, del_timer_sync() is used without holding the lock. + */ +struct sci_timer { + struct timer_list timer; + bool cancel; +}; + +static inline +void sci_init_timer(struct sci_timer *tmr, void (*fn)(unsigned long)) +{ + tmr->timer.function = fn; + tmr->timer.data = (unsigned long) tmr; + tmr->cancel = 0; + init_timer(&tmr->timer); +} + +static inline void sci_mod_timer(struct sci_timer *tmr, unsigned long msec) +{ + tmr->cancel = 0; + mod_timer(&tmr->timer, jiffies + msecs_to_jiffies(msec)); +} + +static inline void sci_del_timer(struct sci_timer *tmr) +{ + tmr->cancel = 1; + del_timer(&tmr->timer); +} + +struct sci_base_state_machine { + const struct sci_base_state *state_table; + u32 initial_state_id; + u32 current_state_id; + u32 previous_state_id; +}; + +typedef void (*sci_state_transition_t)(struct sci_base_state_machine *sm); + +struct sci_base_state { + sci_state_transition_t enter_state; /* Called on state entry */ + sci_state_transition_t exit_state; /* Called on state exit */ +}; + +extern void sci_init_sm(struct sci_base_state_machine *sm, + const struct sci_base_state *state_table, + u32 initial_state); +extern void sci_change_state(struct sci_base_state_machine *sm, u32 next_state); +#endif /* __ISCI_H__ */ diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c new file mode 100644 index 000000000000..79313a7a2356 --- /dev/null +++ b/drivers/scsi/isci/phy.c @@ -0,0 +1,1312 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "isci.h" +#include "host.h" +#include "phy.h" +#include "scu_event_codes.h" +#include "probe_roms.h" + +/* Maximum arbitration wait time in micro-seconds */ +#define SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME (700) + +enum sas_linkrate sci_phy_linkrate(struct isci_phy *iphy) +{ + return iphy->max_negotiated_speed; +} + +static enum sci_status +sci_phy_transport_layer_initialization(struct isci_phy *iphy, + struct scu_transport_layer_registers __iomem *reg) +{ + u32 tl_control; + + iphy->transport_layer_registers = reg; + + writel(SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX, + &iphy->transport_layer_registers->stp_rni); + + /* + * Hardware team recommends that we enable the STP prefetch for all + * transports + */ + tl_control = readl(&iphy->transport_layer_registers->control); + tl_control |= SCU_TLCR_GEN_BIT(STP_WRITE_DATA_PREFETCH); + writel(tl_control, &iphy->transport_layer_registers->control); + + return SCI_SUCCESS; +} + +static enum sci_status +sci_phy_link_layer_initialization(struct isci_phy *iphy, + struct scu_link_layer_registers __iomem *reg) +{ + struct isci_host *ihost = iphy->owning_port->owning_controller; + int phy_idx = iphy->phy_index; + struct sci_phy_user_params *phy_user = &ihost->user_parameters.phys[phy_idx]; + struct sci_phy_oem_params *phy_oem = + &ihost->oem_parameters.phys[phy_idx]; + u32 phy_configuration; + struct sci_phy_cap phy_cap; + u32 parity_check = 0; + u32 parity_count = 0; + u32 llctl, link_rate; + u32 clksm_value = 0; + + iphy->link_layer_registers = reg; + + /* Set our IDENTIFY frame data */ + #define SCI_END_DEVICE 0x01 + + writel(SCU_SAS_TIID_GEN_BIT(SMP_INITIATOR) | + SCU_SAS_TIID_GEN_BIT(SSP_INITIATOR) | + SCU_SAS_TIID_GEN_BIT(STP_INITIATOR) | + SCU_SAS_TIID_GEN_BIT(DA_SATA_HOST) | + SCU_SAS_TIID_GEN_VAL(DEVICE_TYPE, SCI_END_DEVICE), + &iphy->link_layer_registers->transmit_identification); + + /* Write the device SAS Address */ + writel(0xFEDCBA98, + &iphy->link_layer_registers->sas_device_name_high); + writel(phy_idx, &iphy->link_layer_registers->sas_device_name_low); + + /* Write the source SAS Address */ + writel(phy_oem->sas_address.high, + &iphy->link_layer_registers->source_sas_address_high); + writel(phy_oem->sas_address.low, + &iphy->link_layer_registers->source_sas_address_low); + + /* Clear and Set the PHY Identifier */ + writel(0, &iphy->link_layer_registers->identify_frame_phy_id); + writel(SCU_SAS_TIPID_GEN_VALUE(ID, phy_idx), + &iphy->link_layer_registers->identify_frame_phy_id); + + /* Change the initial state of the phy configuration register */ + phy_configuration = + readl(&iphy->link_layer_registers->phy_configuration); + + /* Hold OOB state machine in reset */ + phy_configuration |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET); + writel(phy_configuration, + &iphy->link_layer_registers->phy_configuration); + + /* Configure the SNW capabilities */ + phy_cap.all = 0; + phy_cap.start = 1; + phy_cap.gen3_no_ssc = 1; + phy_cap.gen2_no_ssc = 1; + phy_cap.gen1_no_ssc = 1; + if (ihost->oem_parameters.controller.do_enable_ssc == true) { + phy_cap.gen3_ssc = 1; + phy_cap.gen2_ssc = 1; + phy_cap.gen1_ssc = 1; + } + + /* + * The SAS specification indicates that the phy_capabilities that + * are transmitted shall have an even parity. Calculate the parity. */ + parity_check = phy_cap.all; + while (parity_check != 0) { + if (parity_check & 0x1) + parity_count++; + parity_check >>= 1; + } + + /* + * If parity indicates there are an odd number of bits set, then + * set the parity bit to 1 in the phy capabilities. */ + if ((parity_count % 2) != 0) + phy_cap.parity = 1; + + writel(phy_cap.all, &iphy->link_layer_registers->phy_capabilities); + + /* Set the enable spinup period but disable the ability to send + * notify enable spinup + */ + writel(SCU_ENSPINUP_GEN_VAL(COUNT, + phy_user->notify_enable_spin_up_insertion_frequency), + &iphy->link_layer_registers->notify_enable_spinup_control); + + /* Write the ALIGN Insertion Ferequency for connected phy and + * inpendent of connected state + */ + clksm_value = SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(CONNECTED, + phy_user->in_connection_align_insertion_frequency); + + clksm_value |= SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(GENERAL, + phy_user->align_insertion_frequency); + + writel(clksm_value, &iphy->link_layer_registers->clock_skew_management); + + /* @todo Provide a way to write this register correctly */ + writel(0x02108421, + &iphy->link_layer_registers->afe_lookup_table_control); + + llctl = SCU_SAS_LLCTL_GEN_VAL(NO_OUTBOUND_TASK_TIMEOUT, + (u8)ihost->user_parameters.no_outbound_task_timeout); + + switch (phy_user->max_speed_generation) { + case SCIC_SDS_PARM_GEN3_SPEED: + link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN3; + break; + case SCIC_SDS_PARM_GEN2_SPEED: + link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN2; + break; + default: + link_rate = SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN1; + break; + } + llctl |= SCU_SAS_LLCTL_GEN_VAL(MAX_LINK_RATE, link_rate); + writel(llctl, &iphy->link_layer_registers->link_layer_control); + + if (is_a2(ihost->pdev)) { + /* Program the max ARB time for the PHY to 700us so we inter-operate with + * the PMC expander which shuts down PHYs if the expander PHY generates too + * many breaks. This time value will guarantee that the initiator PHY will + * generate the break. + */ + writel(SCIC_SDS_PHY_MAX_ARBITRATION_WAIT_TIME, + &iphy->link_layer_registers->maximum_arbitration_wait_timer_timeout); + } + + /* Disable link layer hang detection, rely on the OS timeout for I/O timeouts. */ + writel(0, &iphy->link_layer_registers->link_layer_hang_detection_timeout); + + /* We can exit the initial state to the stopped state */ + sci_change_state(&iphy->sm, SCI_PHY_STOPPED); + + return SCI_SUCCESS; +} + +static void phy_sata_timeout(unsigned long data) +{ + struct sci_timer *tmr = (struct sci_timer *)data; + struct isci_phy *iphy = container_of(tmr, typeof(*iphy), sata_timer); + struct isci_host *ihost = iphy->owning_port->owning_controller; + unsigned long flags; + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmr->cancel) + goto done; + + dev_dbg(sciphy_to_dev(iphy), + "%s: SCIC SDS Phy 0x%p did not receive signature fis before " + "timeout.\n", + __func__, + iphy); + + sci_change_state(&iphy->sm, SCI_PHY_STARTING); +done: + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +/** + * This method returns the port currently containing this phy. If the phy is + * currently contained by the dummy port, then the phy is considered to not + * be part of a port. + * @sci_phy: This parameter specifies the phy for which to retrieve the + * containing port. + * + * This method returns a handle to a port that contains the supplied phy. + * NULL This value is returned if the phy is not part of a real + * port (i.e. it's contained in the dummy port). !NULL All other + * values indicate a handle/pointer to the port containing the phy. + */ +struct isci_port *phy_get_non_dummy_port(struct isci_phy *iphy) +{ + struct isci_port *iport = iphy->owning_port; + + if (iport->physical_port_index == SCIC_SDS_DUMMY_PORT) + return NULL; + + return iphy->owning_port; +} + +/** + * This method will assign a port to the phy object. + * @out]: iphy This parameter specifies the phy for which to assign a port + * object. + * + * + */ +void sci_phy_set_port( + struct isci_phy *iphy, + struct isci_port *iport) +{ + iphy->owning_port = iport; + + if (iphy->bcn_received_while_port_unassigned) { + iphy->bcn_received_while_port_unassigned = false; + sci_port_broadcast_change_received(iphy->owning_port, iphy); + } +} + +enum sci_status sci_phy_initialize(struct isci_phy *iphy, + struct scu_transport_layer_registers __iomem *tl, + struct scu_link_layer_registers __iomem *ll) +{ + /* Perfrom the initialization of the TL hardware */ + sci_phy_transport_layer_initialization(iphy, tl); + + /* Perofrm the initialization of the PE hardware */ + sci_phy_link_layer_initialization(iphy, ll); + + /* There is nothing that needs to be done in this state just + * transition to the stopped state + */ + sci_change_state(&iphy->sm, SCI_PHY_STOPPED); + + return SCI_SUCCESS; +} + +/** + * This method assigns the direct attached device ID for this phy. + * + * @iphy The phy for which the direct attached device id is to + * be assigned. + * @device_id The direct attached device ID to assign to the phy. + * This will either be the RNi for the device or an invalid RNi if there + * is no current device assigned to the phy. + */ +void sci_phy_setup_transport(struct isci_phy *iphy, u32 device_id) +{ + u32 tl_control; + + writel(device_id, &iphy->transport_layer_registers->stp_rni); + + /* + * The read should guarantee that the first write gets posted + * before the next write + */ + tl_control = readl(&iphy->transport_layer_registers->control); + tl_control |= SCU_TLCR_GEN_BIT(CLEAR_TCI_NCQ_MAPPING_TABLE); + writel(tl_control, &iphy->transport_layer_registers->control); +} + +static void sci_phy_suspend(struct isci_phy *iphy) +{ + u32 scu_sas_pcfg_value; + + scu_sas_pcfg_value = + readl(&iphy->link_layer_registers->phy_configuration); + scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE); + writel(scu_sas_pcfg_value, + &iphy->link_layer_registers->phy_configuration); + + sci_phy_setup_transport(iphy, SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX); +} + +void sci_phy_resume(struct isci_phy *iphy) +{ + u32 scu_sas_pcfg_value; + + scu_sas_pcfg_value = + readl(&iphy->link_layer_registers->phy_configuration); + scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE); + writel(scu_sas_pcfg_value, + &iphy->link_layer_registers->phy_configuration); +} + +void sci_phy_get_sas_address(struct isci_phy *iphy, struct sci_sas_address *sas) +{ + sas->high = readl(&iphy->link_layer_registers->source_sas_address_high); + sas->low = readl(&iphy->link_layer_registers->source_sas_address_low); +} + +void sci_phy_get_attached_sas_address(struct isci_phy *iphy, struct sci_sas_address *sas) +{ + struct sas_identify_frame *iaf; + + iaf = &iphy->frame_rcvd.iaf; + memcpy(sas, iaf->sas_addr, SAS_ADDR_SIZE); +} + +void sci_phy_get_protocols(struct isci_phy *iphy, struct sci_phy_proto *proto) +{ + proto->all = readl(&iphy->link_layer_registers->transmit_identification); +} + +enum sci_status sci_phy_start(struct isci_phy *iphy) +{ + enum sci_phy_states state = iphy->sm.current_state_id; + + if (state != SCI_PHY_STOPPED) { + dev_dbg(sciphy_to_dev(iphy), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + return SCI_SUCCESS; +} + +enum sci_status sci_phy_stop(struct isci_phy *iphy) +{ + enum sci_phy_states state = iphy->sm.current_state_id; + + switch (state) { + case SCI_PHY_SUB_INITIAL: + case SCI_PHY_SUB_AWAIT_OSSP_EN: + case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN: + case SCI_PHY_SUB_AWAIT_SAS_POWER: + case SCI_PHY_SUB_AWAIT_SATA_POWER: + case SCI_PHY_SUB_AWAIT_SATA_PHY_EN: + case SCI_PHY_SUB_AWAIT_SATA_SPEED_EN: + case SCI_PHY_SUB_AWAIT_SIG_FIS_UF: + case SCI_PHY_SUB_FINAL: + case SCI_PHY_READY: + break; + default: + dev_dbg(sciphy_to_dev(iphy), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + sci_change_state(&iphy->sm, SCI_PHY_STOPPED); + return SCI_SUCCESS; +} + +enum sci_status sci_phy_reset(struct isci_phy *iphy) +{ + enum sci_phy_states state = iphy->sm.current_state_id; + + if (state != SCI_PHY_READY) { + dev_dbg(sciphy_to_dev(iphy), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + sci_change_state(&iphy->sm, SCI_PHY_RESETTING); + return SCI_SUCCESS; +} + +enum sci_status sci_phy_consume_power_handler(struct isci_phy *iphy) +{ + enum sci_phy_states state = iphy->sm.current_state_id; + + switch (state) { + case SCI_PHY_SUB_AWAIT_SAS_POWER: { + u32 enable_spinup; + + enable_spinup = readl(&iphy->link_layer_registers->notify_enable_spinup_control); + enable_spinup |= SCU_ENSPINUP_GEN_BIT(ENABLE); + writel(enable_spinup, &iphy->link_layer_registers->notify_enable_spinup_control); + + /* Change state to the final state this substate machine has run to completion */ + sci_change_state(&iphy->sm, SCI_PHY_SUB_FINAL); + + return SCI_SUCCESS; + } + case SCI_PHY_SUB_AWAIT_SATA_POWER: { + u32 scu_sas_pcfg_value; + + /* Release the spinup hold state and reset the OOB state machine */ + scu_sas_pcfg_value = + readl(&iphy->link_layer_registers->phy_configuration); + scu_sas_pcfg_value &= + ~(SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD) | SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE)); + scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_RESET); + writel(scu_sas_pcfg_value, + &iphy->link_layer_registers->phy_configuration); + + /* Now restart the OOB operation */ + scu_sas_pcfg_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET); + scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); + writel(scu_sas_pcfg_value, + &iphy->link_layer_registers->phy_configuration); + + /* Change state to the final state this substate machine has run to completion */ + sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_PHY_EN); + + return SCI_SUCCESS; + } + default: + dev_dbg(sciphy_to_dev(iphy), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +static void sci_phy_start_sas_link_training(struct isci_phy *iphy) +{ + /* continue the link training for the phy as if it were a SAS PHY + * instead of a SATA PHY. This is done because the completion queue had a SAS + * PHY DETECTED event when the state machine was expecting a SATA PHY event. + */ + u32 phy_control; + + phy_control = readl(&iphy->link_layer_registers->phy_configuration); + phy_control |= SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD); + writel(phy_control, + &iphy->link_layer_registers->phy_configuration); + + sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SAS_SPEED_EN); + + iphy->protocol = SCIC_SDS_PHY_PROTOCOL_SAS; +} + +static void sci_phy_start_sata_link_training(struct isci_phy *iphy) +{ + /* This method continues the link training for the phy as if it were a SATA PHY + * instead of a SAS PHY. This is done because the completion queue had a SATA + * SPINUP HOLD event when the state machine was expecting a SAS PHY event. none + */ + sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_POWER); + + iphy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA; +} + +/** + * sci_phy_complete_link_training - perform processing common to + * all protocols upon completion of link training. + * @sci_phy: This parameter specifies the phy object for which link training + * has completed. + * @max_link_rate: This parameter specifies the maximum link rate to be + * associated with this phy. + * @next_state: This parameter specifies the next state for the phy's starting + * sub-state machine. + * + */ +static void sci_phy_complete_link_training(struct isci_phy *iphy, + enum sas_linkrate max_link_rate, + u32 next_state) +{ + iphy->max_negotiated_speed = max_link_rate; + + sci_change_state(&iphy->sm, next_state); +} + +enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code) +{ + enum sci_phy_states state = iphy->sm.current_state_id; + + switch (state) { + case SCI_PHY_SUB_AWAIT_OSSP_EN: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_SAS_PHY_DETECTED: + sci_phy_start_sas_link_training(iphy); + iphy->is_in_link_training = true; + break; + case SCU_EVENT_SATA_SPINUP_HOLD: + sci_phy_start_sata_link_training(iphy); + iphy->is_in_link_training = true; + break; + default: + dev_dbg(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected event_code %x\n", + __func__, + event_code); + return SCI_FAILURE; + } + return SCI_SUCCESS; + case SCI_PHY_SUB_AWAIT_SAS_SPEED_EN: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_SAS_PHY_DETECTED: + /* + * Why is this being reported again by the controller? + * We would re-enter this state so just stay here */ + break; + case SCU_EVENT_SAS_15: + case SCU_EVENT_SAS_15_SSC: + sci_phy_complete_link_training(iphy, SAS_LINK_RATE_1_5_GBPS, + SCI_PHY_SUB_AWAIT_IAF_UF); + break; + case SCU_EVENT_SAS_30: + case SCU_EVENT_SAS_30_SSC: + sci_phy_complete_link_training(iphy, SAS_LINK_RATE_3_0_GBPS, + SCI_PHY_SUB_AWAIT_IAF_UF); + break; + case SCU_EVENT_SAS_60: + case SCU_EVENT_SAS_60_SSC: + sci_phy_complete_link_training(iphy, SAS_LINK_RATE_6_0_GBPS, + SCI_PHY_SUB_AWAIT_IAF_UF); + break; + case SCU_EVENT_SATA_SPINUP_HOLD: + /* + * We were doing SAS PHY link training and received a SATA PHY event + * continue OOB/SN as if this were a SATA PHY */ + sci_phy_start_sata_link_training(iphy); + break; + case SCU_EVENT_LINK_FAILURE: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + default: + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected event_code %x\n", + __func__, event_code); + + return SCI_FAILURE; + break; + } + return SCI_SUCCESS; + case SCI_PHY_SUB_AWAIT_IAF_UF: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_SAS_PHY_DETECTED: + /* Backup the state machine */ + sci_phy_start_sas_link_training(iphy); + break; + case SCU_EVENT_SATA_SPINUP_HOLD: + /* We were doing SAS PHY link training and received a + * SATA PHY event continue OOB/SN as if this were a + * SATA PHY + */ + sci_phy_start_sata_link_training(iphy); + break; + case SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT: + case SCU_EVENT_LINK_FAILURE: + case SCU_EVENT_HARD_RESET_RECEIVED: + /* Start the oob/sn state machine over again */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + default: + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected event_code %x\n", + __func__, event_code); + return SCI_FAILURE; + } + return SCI_SUCCESS; + case SCI_PHY_SUB_AWAIT_SAS_POWER: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_LINK_FAILURE: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + default: + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received unexpected " + "event_code %x\n", + __func__, + event_code); + return SCI_FAILURE; + } + return SCI_SUCCESS; + case SCI_PHY_SUB_AWAIT_SATA_POWER: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_LINK_FAILURE: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + case SCU_EVENT_SATA_SPINUP_HOLD: + /* These events are received every 10ms and are + * expected while in this state + */ + break; + + case SCU_EVENT_SAS_PHY_DETECTED: + /* There has been a change in the phy type before OOB/SN for the + * SATA finished start down the SAS link traning path. + */ + sci_phy_start_sas_link_training(iphy); + break; + + default: + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected event_code %x\n", + __func__, event_code); + + return SCI_FAILURE; + } + return SCI_SUCCESS; + case SCI_PHY_SUB_AWAIT_SATA_PHY_EN: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_LINK_FAILURE: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + case SCU_EVENT_SATA_SPINUP_HOLD: + /* These events might be received since we dont know how many may be in + * the completion queue while waiting for power + */ + break; + case SCU_EVENT_SATA_PHY_DETECTED: + iphy->protocol = SCIC_SDS_PHY_PROTOCOL_SATA; + + /* We have received the SATA PHY notification change state */ + sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_SPEED_EN); + break; + case SCU_EVENT_SAS_PHY_DETECTED: + /* There has been a change in the phy type before OOB/SN for the + * SATA finished start down the SAS link traning path. + */ + sci_phy_start_sas_link_training(iphy); + break; + default: + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected event_code %x\n", + __func__, + event_code); + + return SCI_FAILURE;; + } + return SCI_SUCCESS; + case SCI_PHY_SUB_AWAIT_SATA_SPEED_EN: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_SATA_PHY_DETECTED: + /* + * The hardware reports multiple SATA PHY detected events + * ignore the extras */ + break; + case SCU_EVENT_SATA_15: + case SCU_EVENT_SATA_15_SSC: + sci_phy_complete_link_training(iphy, SAS_LINK_RATE_1_5_GBPS, + SCI_PHY_SUB_AWAIT_SIG_FIS_UF); + break; + case SCU_EVENT_SATA_30: + case SCU_EVENT_SATA_30_SSC: + sci_phy_complete_link_training(iphy, SAS_LINK_RATE_3_0_GBPS, + SCI_PHY_SUB_AWAIT_SIG_FIS_UF); + break; + case SCU_EVENT_SATA_60: + case SCU_EVENT_SATA_60_SSC: + sci_phy_complete_link_training(iphy, SAS_LINK_RATE_6_0_GBPS, + SCI_PHY_SUB_AWAIT_SIG_FIS_UF); + break; + case SCU_EVENT_LINK_FAILURE: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + case SCU_EVENT_SAS_PHY_DETECTED: + /* + * There has been a change in the phy type before OOB/SN for the + * SATA finished start down the SAS link traning path. */ + sci_phy_start_sas_link_training(iphy); + break; + default: + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected event_code %x\n", + __func__, event_code); + + return SCI_FAILURE; + } + + return SCI_SUCCESS; + case SCI_PHY_SUB_AWAIT_SIG_FIS_UF: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_SATA_PHY_DETECTED: + /* Backup the state machine */ + sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_SATA_SPEED_EN); + break; + + case SCU_EVENT_LINK_FAILURE: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + + default: + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected event_code %x\n", + __func__, + event_code); + + return SCI_FAILURE; + } + return SCI_SUCCESS; + case SCI_PHY_READY: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_LINK_FAILURE: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + case SCU_EVENT_BROADCAST_CHANGE: + /* Broadcast change received. Notify the port. */ + if (phy_get_non_dummy_port(iphy) != NULL) + sci_port_broadcast_change_received(iphy->owning_port, iphy); + else + iphy->bcn_received_while_port_unassigned = true; + break; + default: + dev_warn(sciphy_to_dev(iphy), + "%sP SCIC PHY 0x%p ready state machine received " + "unexpected event_code %x\n", + __func__, iphy, event_code); + return SCI_FAILURE_INVALID_STATE; + } + return SCI_SUCCESS; + case SCI_PHY_RESETTING: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_HARD_RESET_TRANSMITTED: + /* Link failure change state back to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + break; + default: + dev_warn(sciphy_to_dev(iphy), + "%s: SCIC PHY 0x%p resetting state machine received " + "unexpected event_code %x\n", + __func__, iphy, event_code); + + return SCI_FAILURE_INVALID_STATE; + break; + } + return SCI_SUCCESS; + default: + dev_dbg(sciphy_to_dev(iphy), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status sci_phy_frame_handler(struct isci_phy *iphy, u32 frame_index) +{ + enum sci_phy_states state = iphy->sm.current_state_id; + struct isci_host *ihost = iphy->owning_port->owning_controller; + enum sci_status result; + unsigned long flags; + + switch (state) { + case SCI_PHY_SUB_AWAIT_IAF_UF: { + u32 *frame_words; + struct sas_identify_frame iaf; + + result = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_words); + + if (result != SCI_SUCCESS) + return result; + + sci_swab32_cpy(&iaf, frame_words, sizeof(iaf) / sizeof(u32)); + if (iaf.frame_type == 0) { + u32 state; + + spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); + memcpy(&iphy->frame_rcvd.iaf, &iaf, sizeof(iaf)); + spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); + if (iaf.smp_tport) { + /* We got the IAF for an expander PHY go to the final + * state since there are no power requirements for + * expander phys. + */ + state = SCI_PHY_SUB_FINAL; + } else { + /* We got the IAF we can now go to the await spinup + * semaphore state + */ + state = SCI_PHY_SUB_AWAIT_SAS_POWER; + } + sci_change_state(&iphy->sm, state); + result = SCI_SUCCESS; + } else + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected frame id %x\n", + __func__, frame_index); + + sci_controller_release_frame(ihost, frame_index); + return result; + } + case SCI_PHY_SUB_AWAIT_SIG_FIS_UF: { + struct dev_to_host_fis *frame_header; + u32 *fis_frame_data; + + result = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_header); + + if (result != SCI_SUCCESS) + return result; + + if ((frame_header->fis_type == FIS_REGD2H) && + !(frame_header->status & ATA_BUSY)) { + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&fis_frame_data); + + spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); + sci_controller_copy_sata_response(&iphy->frame_rcvd.fis, + frame_header, + fis_frame_data); + spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); + + /* got IAF we can now go to the await spinup semaphore state */ + sci_change_state(&iphy->sm, SCI_PHY_SUB_FINAL); + + result = SCI_SUCCESS; + } else + dev_warn(sciphy_to_dev(iphy), + "%s: PHY starting substate machine received " + "unexpected frame id %x\n", + __func__, frame_index); + + /* Regardless of the result we are done with this frame with it */ + sci_controller_release_frame(ihost, frame_index); + + return result; + } + default: + dev_dbg(sciphy_to_dev(iphy), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + +} + +static void sci_phy_starting_initial_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + /* This is just an temporary state go off to the starting state */ + sci_change_state(&iphy->sm, SCI_PHY_SUB_AWAIT_OSSP_EN); +} + +static void sci_phy_starting_await_sas_power_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + struct isci_host *ihost = iphy->owning_port->owning_controller; + + sci_controller_power_control_queue_insert(ihost, iphy); +} + +static void sci_phy_starting_await_sas_power_substate_exit(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + struct isci_host *ihost = iphy->owning_port->owning_controller; + + sci_controller_power_control_queue_remove(ihost, iphy); +} + +static void sci_phy_starting_await_sata_power_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + struct isci_host *ihost = iphy->owning_port->owning_controller; + + sci_controller_power_control_queue_insert(ihost, iphy); +} + +static void sci_phy_starting_await_sata_power_substate_exit(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + struct isci_host *ihost = iphy->owning_port->owning_controller; + + sci_controller_power_control_queue_remove(ihost, iphy); +} + +static void sci_phy_starting_await_sata_phy_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + sci_mod_timer(&iphy->sata_timer, SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT); +} + +static void sci_phy_starting_await_sata_phy_substate_exit(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + sci_del_timer(&iphy->sata_timer); +} + +static void sci_phy_starting_await_sata_speed_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + sci_mod_timer(&iphy->sata_timer, SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT); +} + +static void sci_phy_starting_await_sata_speed_substate_exit(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + sci_del_timer(&iphy->sata_timer); +} + +static void sci_phy_starting_await_sig_fis_uf_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + if (sci_port_link_detected(iphy->owning_port, iphy)) { + + /* + * Clear the PE suspend condition so we can actually + * receive SIG FIS + * The hardware will not respond to the XRDY until the PE + * suspend condition is cleared. + */ + sci_phy_resume(iphy); + + sci_mod_timer(&iphy->sata_timer, + SCIC_SDS_SIGNATURE_FIS_TIMEOUT); + } else + iphy->is_in_link_training = false; +} + +static void sci_phy_starting_await_sig_fis_uf_substate_exit(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + sci_del_timer(&iphy->sata_timer); +} + +static void sci_phy_starting_final_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + /* State machine has run to completion so exit out and change + * the base state machine to the ready state + */ + sci_change_state(&iphy->sm, SCI_PHY_READY); +} + +/** + * + * @sci_phy: This is the struct isci_phy object to stop. + * + * This method will stop the struct isci_phy object. This does not reset the + * protocol engine it just suspends it and places it in a state where it will + * not cause the end device to power up. none + */ +static void scu_link_layer_stop_protocol_engine( + struct isci_phy *iphy) +{ + u32 scu_sas_pcfg_value; + u32 enable_spinup_value; + + /* Suspend the protocol engine and place it in a sata spinup hold state */ + scu_sas_pcfg_value = + readl(&iphy->link_layer_registers->phy_configuration); + scu_sas_pcfg_value |= + (SCU_SAS_PCFG_GEN_BIT(OOB_RESET) | + SCU_SAS_PCFG_GEN_BIT(SUSPEND_PROTOCOL_ENGINE) | + SCU_SAS_PCFG_GEN_BIT(SATA_SPINUP_HOLD)); + writel(scu_sas_pcfg_value, + &iphy->link_layer_registers->phy_configuration); + + /* Disable the notify enable spinup primitives */ + enable_spinup_value = readl(&iphy->link_layer_registers->notify_enable_spinup_control); + enable_spinup_value &= ~SCU_ENSPINUP_GEN_BIT(ENABLE); + writel(enable_spinup_value, &iphy->link_layer_registers->notify_enable_spinup_control); +} + +/** + * + * + * This method will start the OOB/SN state machine for this struct isci_phy object. + */ +static void scu_link_layer_start_oob( + struct isci_phy *iphy) +{ + u32 scu_sas_pcfg_value; + + scu_sas_pcfg_value = + readl(&iphy->link_layer_registers->phy_configuration); + scu_sas_pcfg_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); + scu_sas_pcfg_value &= + ~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) | + SCU_SAS_PCFG_GEN_BIT(HARD_RESET)); + writel(scu_sas_pcfg_value, + &iphy->link_layer_registers->phy_configuration); +} + +/** + * + * + * This method will transmit a hard reset request on the specified phy. The SCU + * hardware requires that we reset the OOB state machine and set the hard reset + * bit in the phy configuration register. We then must start OOB over with the + * hard reset bit set. + */ +static void scu_link_layer_tx_hard_reset( + struct isci_phy *iphy) +{ + u32 phy_configuration_value; + + /* + * SAS Phys must wait for the HARD_RESET_TX event notification to transition + * to the starting state. */ + phy_configuration_value = + readl(&iphy->link_layer_registers->phy_configuration); + phy_configuration_value |= + (SCU_SAS_PCFG_GEN_BIT(HARD_RESET) | + SCU_SAS_PCFG_GEN_BIT(OOB_RESET)); + writel(phy_configuration_value, + &iphy->link_layer_registers->phy_configuration); + + /* Now take the OOB state machine out of reset */ + phy_configuration_value |= SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE); + phy_configuration_value &= ~SCU_SAS_PCFG_GEN_BIT(OOB_RESET); + writel(phy_configuration_value, + &iphy->link_layer_registers->phy_configuration); +} + +static void sci_phy_stopped_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + struct isci_port *iport = iphy->owning_port; + struct isci_host *ihost = iport->owning_controller; + + /* + * @todo We need to get to the controller to place this PE in a + * reset state + */ + sci_del_timer(&iphy->sata_timer); + + scu_link_layer_stop_protocol_engine(iphy); + + if (iphy->sm.previous_state_id != SCI_PHY_INITIAL) + sci_controller_link_down(ihost, phy_get_non_dummy_port(iphy), iphy); +} + +static void sci_phy_starting_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + struct isci_port *iport = iphy->owning_port; + struct isci_host *ihost = iport->owning_controller; + + scu_link_layer_stop_protocol_engine(iphy); + scu_link_layer_start_oob(iphy); + + /* We don't know what kind of phy we are going to be just yet */ + iphy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN; + iphy->bcn_received_while_port_unassigned = false; + + if (iphy->sm.previous_state_id == SCI_PHY_READY) + sci_controller_link_down(ihost, phy_get_non_dummy_port(iphy), iphy); + + sci_change_state(&iphy->sm, SCI_PHY_SUB_INITIAL); +} + +static void sci_phy_ready_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + struct isci_port *iport = iphy->owning_port; + struct isci_host *ihost = iport->owning_controller; + + sci_controller_link_up(ihost, phy_get_non_dummy_port(iphy), iphy); +} + +static void sci_phy_ready_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + sci_phy_suspend(iphy); +} + +static void sci_phy_resetting_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_phy *iphy = container_of(sm, typeof(*iphy), sm); + + /* The phy is being reset, therefore deactivate it from the port. In + * the resetting state we don't notify the user regarding link up and + * link down notifications + */ + sci_port_deactivate_phy(iphy->owning_port, iphy, false); + + if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) { + scu_link_layer_tx_hard_reset(iphy); + } else { + /* The SCU does not need to have a discrete reset state so + * just go back to the starting state. + */ + sci_change_state(&iphy->sm, SCI_PHY_STARTING); + } +} + +static const struct sci_base_state sci_phy_state_table[] = { + [SCI_PHY_INITIAL] = { }, + [SCI_PHY_STOPPED] = { + .enter_state = sci_phy_stopped_state_enter, + }, + [SCI_PHY_STARTING] = { + .enter_state = sci_phy_starting_state_enter, + }, + [SCI_PHY_SUB_INITIAL] = { + .enter_state = sci_phy_starting_initial_substate_enter, + }, + [SCI_PHY_SUB_AWAIT_OSSP_EN] = { }, + [SCI_PHY_SUB_AWAIT_SAS_SPEED_EN] = { }, + [SCI_PHY_SUB_AWAIT_IAF_UF] = { }, + [SCI_PHY_SUB_AWAIT_SAS_POWER] = { + .enter_state = sci_phy_starting_await_sas_power_substate_enter, + .exit_state = sci_phy_starting_await_sas_power_substate_exit, + }, + [SCI_PHY_SUB_AWAIT_SATA_POWER] = { + .enter_state = sci_phy_starting_await_sata_power_substate_enter, + .exit_state = sci_phy_starting_await_sata_power_substate_exit + }, + [SCI_PHY_SUB_AWAIT_SATA_PHY_EN] = { + .enter_state = sci_phy_starting_await_sata_phy_substate_enter, + .exit_state = sci_phy_starting_await_sata_phy_substate_exit + }, + [SCI_PHY_SUB_AWAIT_SATA_SPEED_EN] = { + .enter_state = sci_phy_starting_await_sata_speed_substate_enter, + .exit_state = sci_phy_starting_await_sata_speed_substate_exit + }, + [SCI_PHY_SUB_AWAIT_SIG_FIS_UF] = { + .enter_state = sci_phy_starting_await_sig_fis_uf_substate_enter, + .exit_state = sci_phy_starting_await_sig_fis_uf_substate_exit + }, + [SCI_PHY_SUB_FINAL] = { + .enter_state = sci_phy_starting_final_substate_enter, + }, + [SCI_PHY_READY] = { + .enter_state = sci_phy_ready_state_enter, + .exit_state = sci_phy_ready_state_exit, + }, + [SCI_PHY_RESETTING] = { + .enter_state = sci_phy_resetting_state_enter, + }, + [SCI_PHY_FINAL] = { }, +}; + +void sci_phy_construct(struct isci_phy *iphy, + struct isci_port *iport, u8 phy_index) +{ + sci_init_sm(&iphy->sm, sci_phy_state_table, SCI_PHY_INITIAL); + + /* Copy the rest of the input data to our locals */ + iphy->owning_port = iport; + iphy->phy_index = phy_index; + iphy->bcn_received_while_port_unassigned = false; + iphy->protocol = SCIC_SDS_PHY_PROTOCOL_UNKNOWN; + iphy->link_layer_registers = NULL; + iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; + + /* Create the SIGNATURE FIS Timeout timer for this phy */ + sci_init_timer(&iphy->sata_timer, phy_sata_timeout); +} + +void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index) +{ + struct sci_oem_params *oem = &ihost->oem_parameters; + u64 sci_sas_addr; + __be64 sas_addr; + + sci_sas_addr = oem->phys[index].sas_address.high; + sci_sas_addr <<= 32; + sci_sas_addr |= oem->phys[index].sas_address.low; + sas_addr = cpu_to_be64(sci_sas_addr); + memcpy(iphy->sas_addr, &sas_addr, sizeof(sas_addr)); + + iphy->isci_port = NULL; + iphy->sas_phy.enabled = 0; + iphy->sas_phy.id = index; + iphy->sas_phy.sas_addr = &iphy->sas_addr[0]; + iphy->sas_phy.frame_rcvd = (u8 *)&iphy->frame_rcvd; + iphy->sas_phy.ha = &ihost->sas_ha; + iphy->sas_phy.lldd_phy = iphy; + iphy->sas_phy.enabled = 1; + iphy->sas_phy.class = SAS; + iphy->sas_phy.iproto = SAS_PROTOCOL_ALL; + iphy->sas_phy.tproto = 0; + iphy->sas_phy.type = PHY_TYPE_PHYSICAL; + iphy->sas_phy.role = PHY_ROLE_INITIATOR; + iphy->sas_phy.oob_mode = OOB_NOT_CONNECTED; + iphy->sas_phy.linkrate = SAS_LINK_RATE_UNKNOWN; + memset(&iphy->frame_rcvd, 0, sizeof(iphy->frame_rcvd)); +} + + +/** + * isci_phy_control() - This function is one of the SAS Domain Template + * functions. This is a phy management function. + * @phy: This parameter specifies the sphy being controlled. + * @func: This parameter specifies the phy control function being invoked. + * @buf: This parameter is specific to the phy function being invoked. + * + * status, zero indicates success. + */ +int isci_phy_control(struct asd_sas_phy *sas_phy, + enum phy_func func, + void *buf) +{ + int ret = 0; + struct isci_phy *iphy = sas_phy->lldd_phy; + struct isci_port *iport = iphy->isci_port; + struct isci_host *ihost = sas_phy->ha->lldd_ha; + unsigned long flags; + + dev_dbg(&ihost->pdev->dev, + "%s: phy %p; func %d; buf %p; isci phy %p, port %p\n", + __func__, sas_phy, func, buf, iphy, iport); + + switch (func) { + case PHY_FUNC_DISABLE: + spin_lock_irqsave(&ihost->scic_lock, flags); + sci_phy_stop(iphy); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + break; + + case PHY_FUNC_LINK_RESET: + spin_lock_irqsave(&ihost->scic_lock, flags); + sci_phy_stop(iphy); + sci_phy_start(iphy); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + break; + + case PHY_FUNC_HARD_RESET: + if (!iport) + return -ENODEV; + + /* Perform the port reset. */ + ret = isci_port_perform_hard_reset(ihost, iport, iphy); + + break; + + default: + dev_dbg(&ihost->pdev->dev, + "%s: phy %p; func %d NOT IMPLEMENTED!\n", + __func__, sas_phy, func); + ret = -ENOSYS; + break; + } + return ret; +} diff --git a/drivers/scsi/isci/phy.h b/drivers/scsi/isci/phy.h new file mode 100644 index 000000000000..67699c8e321c --- /dev/null +++ b/drivers/scsi/isci/phy.h @@ -0,0 +1,504 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _ISCI_PHY_H_ +#define _ISCI_PHY_H_ + +#include <scsi/sas.h> +#include <scsi/libsas.h> +#include "isci.h" +#include "sas.h" + +/* This is the timeout value for the SATA phy to wait for a SIGNATURE FIS + * before restarting the starting state machine. Technically, the old parallel + * ATA specification required up to 30 seconds for a device to issue its + * signature FIS as a result of a soft reset. Now we see that devices respond + * generally within 15 seconds, but we'll use 25 for now. + */ +#define SCIC_SDS_SIGNATURE_FIS_TIMEOUT 25000 + +/* This is the timeout for the SATA OOB/SN because the hardware does not + * recognize a hot plug after OOB signal but before the SN signals. We need to + * make sure after a hotplug timeout if we have not received the speed event + * notification from the hardware that we restart the hardware OOB state + * machine. + */ +#define SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT 250 + +enum sci_phy_protocol { + SCIC_SDS_PHY_PROTOCOL_UNKNOWN, + SCIC_SDS_PHY_PROTOCOL_SAS, + SCIC_SDS_PHY_PROTOCOL_SATA, + SCIC_SDS_MAX_PHY_PROTOCOLS +}; + +/** + * isci_phy - hba local phy infrastructure + * @sm: + * @protocol: attached device protocol + * @phy_index: physical index relative to the controller (0-3) + * @bcn_received_while_port_unassigned: bcn to report after port association + * @sata_timer: timeout SATA signature FIS arrival + */ +struct isci_phy { + struct sci_base_state_machine sm; + struct isci_port *owning_port; + enum sas_linkrate max_negotiated_speed; + enum sci_phy_protocol protocol; + u8 phy_index; + bool bcn_received_while_port_unassigned; + bool is_in_link_training; + struct sci_timer sata_timer; + struct scu_transport_layer_registers __iomem *transport_layer_registers; + struct scu_link_layer_registers __iomem *link_layer_registers; + struct asd_sas_phy sas_phy; + struct isci_port *isci_port; + u8 sas_addr[SAS_ADDR_SIZE]; + union { + struct sas_identify_frame iaf; + struct dev_to_host_fis fis; + } frame_rcvd; +}; + +static inline struct isci_phy *to_iphy(struct asd_sas_phy *sas_phy) +{ + struct isci_phy *iphy = container_of(sas_phy, typeof(*iphy), sas_phy); + + return iphy; +} + +struct sci_phy_cap { + union { + struct { + /* + * The SAS specification indicates the start bit shall + * always be set to + * 1. This implementation will have the start bit set + * to 0 if the PHY CAPABILITIES were either not + * received or speed negotiation failed. + */ + u8 start:1; + u8 tx_ssc_type:1; + u8 res1:2; + u8 req_logical_linkrate:4; + + u32 gen1_no_ssc:1; + u32 gen1_ssc:1; + u32 gen2_no_ssc:1; + u32 gen2_ssc:1; + u32 gen3_no_ssc:1; + u32 gen3_ssc:1; + u32 res2:17; + u32 parity:1; + }; + u32 all; + }; +} __packed; + +/* this data structure reflects the link layer transmit identification reg */ +struct sci_phy_proto { + union { + struct { + u16 _r_a:1; + u16 smp_iport:1; + u16 stp_iport:1; + u16 ssp_iport:1; + u16 _r_b:4; + u16 _r_c:1; + u16 smp_tport:1; + u16 stp_tport:1; + u16 ssp_tport:1; + u16 _r_d:4; + }; + u16 all; + }; +} __packed; + + +/** + * struct sci_phy_properties - This structure defines the properties common to + * all phys that can be retrieved. + * + * + */ +struct sci_phy_properties { + /** + * This field specifies the port that currently contains the + * supplied phy. This field may be set to NULL + * if the phy is not currently contained in a port. + */ + struct isci_port *iport; + + /** + * This field specifies the link rate at which the phy is + * currently operating. + */ + enum sas_linkrate negotiated_link_rate; + + /** + * This field specifies the index of the phy in relation to other + * phys within the controller. This index is zero relative. + */ + u8 index; +}; + +/** + * struct sci_sas_phy_properties - This structure defines the properties, + * specific to a SAS phy, that can be retrieved. + * + * + */ +struct sci_sas_phy_properties { + /** + * This field delineates the Identify Address Frame received + * from the remote end point. + */ + struct sas_identify_frame rcvd_iaf; + + /** + * This field delineates the Phy capabilities structure received + * from the remote end point. + */ + struct sci_phy_cap rcvd_cap; + +}; + +/** + * struct sci_sata_phy_properties - This structure defines the properties, + * specific to a SATA phy, that can be retrieved. + * + * + */ +struct sci_sata_phy_properties { + /** + * This field delineates the signature FIS received from the + * attached target. + */ + struct dev_to_host_fis signature_fis; + + /** + * This field specifies to the user if a port selector is connected + * on the specified phy. + */ + bool is_port_selector_present; + +}; + +/** + * enum sci_phy_counter_id - This enumeration depicts the various pieces of + * optional information that can be retrieved for a specific phy. + * + * + */ +enum sci_phy_counter_id { + /** + * This PHY information field tracks the number of frames received. + */ + SCIC_PHY_COUNTER_RECEIVED_FRAME, + + /** + * This PHY information field tracks the number of frames transmitted. + */ + SCIC_PHY_COUNTER_TRANSMITTED_FRAME, + + /** + * This PHY information field tracks the number of DWORDs received. + */ + SCIC_PHY_COUNTER_RECEIVED_FRAME_WORD, + + /** + * This PHY information field tracks the number of DWORDs transmitted. + */ + SCIC_PHY_COUNTER_TRANSMITTED_FRAME_DWORD, + + /** + * This PHY information field tracks the number of times DWORD + * synchronization was lost. + */ + SCIC_PHY_COUNTER_LOSS_OF_SYNC_ERROR, + + /** + * This PHY information field tracks the number of received DWORDs with + * running disparity errors. + */ + SCIC_PHY_COUNTER_RECEIVED_DISPARITY_ERROR, + + /** + * This PHY information field tracks the number of received frames with a + * CRC error (not including short or truncated frames). + */ + SCIC_PHY_COUNTER_RECEIVED_FRAME_CRC_ERROR, + + /** + * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT) + * primitives received. + */ + SCIC_PHY_COUNTER_RECEIVED_DONE_ACK_NAK_TIMEOUT, + + /** + * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT) + * primitives transmitted. + */ + SCIC_PHY_COUNTER_TRANSMITTED_DONE_ACK_NAK_TIMEOUT, + + /** + * This PHY information field tracks the number of times the inactivity + * timer for connections on the phy has been utilized. + */ + SCIC_PHY_COUNTER_INACTIVITY_TIMER_EXPIRED, + + /** + * This PHY information field tracks the number of DONE (CREDIT TIMEOUT) + * primitives received. + */ + SCIC_PHY_COUNTER_RECEIVED_DONE_CREDIT_TIMEOUT, + + /** + * This PHY information field tracks the number of DONE (CREDIT TIMEOUT) + * primitives transmitted. + */ + SCIC_PHY_COUNTER_TRANSMITTED_DONE_CREDIT_TIMEOUT, + + /** + * This PHY information field tracks the number of CREDIT BLOCKED + * primitives received. + * @note Depending on remote device implementation, credit blocks + * may occur regularly. + */ + SCIC_PHY_COUNTER_RECEIVED_CREDIT_BLOCKED, + + /** + * This PHY information field contains the number of short frames + * received. A short frame is simply a frame smaller then what is + * allowed by either the SAS or SATA specification. + */ + SCIC_PHY_COUNTER_RECEIVED_SHORT_FRAME, + + /** + * This PHY information field contains the number of frames received after + * credit has been exhausted. + */ + SCIC_PHY_COUNTER_RECEIVED_FRAME_WITHOUT_CREDIT, + + /** + * This PHY information field contains the number of frames received after + * a DONE has been received. + */ + SCIC_PHY_COUNTER_RECEIVED_FRAME_AFTER_DONE, + + /** + * This PHY information field contains the number of times the phy + * failed to achieve DWORD synchronization during speed negotiation. + */ + SCIC_PHY_COUNTER_SN_DWORD_SYNC_ERROR +}; + +enum sci_phy_states { + /** + * Simply the initial state for the base domain state machine. + */ + SCI_PHY_INITIAL, + + /** + * This state indicates that the phy has successfully been stopped. + * In this state no new IO operations are permitted on this phy. + * This state is entered from the INITIAL state. + * This state is entered from the STARTING state. + * This state is entered from the READY state. + * This state is entered from the RESETTING state. + */ + SCI_PHY_STOPPED, + + /** + * This state indicates that the phy is in the process of becomming + * ready. In this state no new IO operations are permitted on this phy. + * This state is entered from the STOPPED state. + * This state is entered from the READY state. + * This state is entered from the RESETTING state. + */ + SCI_PHY_STARTING, + + /** + * Initial state + */ + SCI_PHY_SUB_INITIAL, + + /** + * Wait state for the hardware OSSP event type notification + */ + SCI_PHY_SUB_AWAIT_OSSP_EN, + + /** + * Wait state for the PHY speed notification + */ + SCI_PHY_SUB_AWAIT_SAS_SPEED_EN, + + /** + * Wait state for the IAF Unsolicited frame notification + */ + SCI_PHY_SUB_AWAIT_IAF_UF, + + /** + * Wait state for the request to consume power + */ + SCI_PHY_SUB_AWAIT_SAS_POWER, + + /** + * Wait state for request to consume power + */ + SCI_PHY_SUB_AWAIT_SATA_POWER, + + /** + * Wait state for the SATA PHY notification + */ + SCI_PHY_SUB_AWAIT_SATA_PHY_EN, + + /** + * Wait for the SATA PHY speed notification + */ + SCI_PHY_SUB_AWAIT_SATA_SPEED_EN, + + /** + * Wait state for the SIGNATURE FIS unsolicited frame notification + */ + SCI_PHY_SUB_AWAIT_SIG_FIS_UF, + + /** + * Exit state for this state machine + */ + SCI_PHY_SUB_FINAL, + + /** + * This state indicates the the phy is now ready. Thus, the user + * is able to perform IO operations utilizing this phy as long as it + * is currently part of a valid port. + * This state is entered from the STARTING state. + */ + SCI_PHY_READY, + + /** + * This state indicates that the phy is in the process of being reset. + * In this state no new IO operations are permitted on this phy. + * This state is entered from the READY state. + */ + SCI_PHY_RESETTING, + + /** + * Simply the final state for the base phy state machine. + */ + SCI_PHY_FINAL, +}; + +void sci_phy_construct( + struct isci_phy *iphy, + struct isci_port *iport, + u8 phy_index); + +struct isci_port *phy_get_non_dummy_port(struct isci_phy *iphy); + +void sci_phy_set_port( + struct isci_phy *iphy, + struct isci_port *iport); + +enum sci_status sci_phy_initialize( + struct isci_phy *iphy, + struct scu_transport_layer_registers __iomem *transport_layer_registers, + struct scu_link_layer_registers __iomem *link_layer_registers); + +enum sci_status sci_phy_start( + struct isci_phy *iphy); + +enum sci_status sci_phy_stop( + struct isci_phy *iphy); + +enum sci_status sci_phy_reset( + struct isci_phy *iphy); + +void sci_phy_resume( + struct isci_phy *iphy); + +void sci_phy_setup_transport( + struct isci_phy *iphy, + u32 device_id); + +enum sci_status sci_phy_event_handler( + struct isci_phy *iphy, + u32 event_code); + +enum sci_status sci_phy_frame_handler( + struct isci_phy *iphy, + u32 frame_index); + +enum sci_status sci_phy_consume_power_handler( + struct isci_phy *iphy); + +void sci_phy_get_sas_address( + struct isci_phy *iphy, + struct sci_sas_address *sas_address); + +void sci_phy_get_attached_sas_address( + struct isci_phy *iphy, + struct sci_sas_address *sas_address); + +struct sci_phy_proto; +void sci_phy_get_protocols( + struct isci_phy *iphy, + struct sci_phy_proto *protocols); +enum sas_linkrate sci_phy_linkrate(struct isci_phy *iphy); + +struct isci_host; +void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index); +int isci_phy_control(struct asd_sas_phy *phy, enum phy_func func, void *buf); + +#endif /* !defined(_ISCI_PHY_H_) */ diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c new file mode 100644 index 000000000000..8f6f9b77e41a --- /dev/null +++ b/drivers/scsi/isci/port.c @@ -0,0 +1,1757 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "isci.h" +#include "port.h" +#include "request.h" + +#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) +#define SCU_DUMMY_INDEX (0xFFFF) + +static void isci_port_change_state(struct isci_port *iport, enum isci_status status) +{ + unsigned long flags; + + dev_dbg(&iport->isci_host->pdev->dev, + "%s: iport = %p, state = 0x%x\n", + __func__, iport, status); + + /* XXX pointless lock */ + spin_lock_irqsave(&iport->state_lock, flags); + iport->status = status; + spin_unlock_irqrestore(&iport->state_lock, flags); +} + +static void sci_port_get_protocols(struct isci_port *iport, struct sci_phy_proto *proto) +{ + u8 index; + + proto->all = 0; + for (index = 0; index < SCI_MAX_PHYS; index++) { + struct isci_phy *iphy = iport->phy_table[index]; + + if (!iphy) + continue; + sci_phy_get_protocols(iphy, proto); + } +} + +static u32 sci_port_get_phys(struct isci_port *iport) +{ + u32 index; + u32 mask; + + mask = 0; + for (index = 0; index < SCI_MAX_PHYS; index++) + if (iport->phy_table[index]) + mask |= (1 << index); + + return mask; +} + +/** + * sci_port_get_properties() - This method simply returns the properties + * regarding the port, such as: physical index, protocols, sas address, etc. + * @port: this parameter specifies the port for which to retrieve the physical + * index. + * @properties: This parameter specifies the properties structure into which to + * copy the requested information. + * + * Indicate if the user specified a valid port. SCI_SUCCESS This value is + * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This + * value is returned if the specified port is not valid. When this value is + * returned, no data is copied to the properties output parameter. + */ +static enum sci_status sci_port_get_properties(struct isci_port *iport, + struct sci_port_properties *prop) +{ + if (!iport || iport->logical_port_index == SCIC_SDS_DUMMY_PORT) + return SCI_FAILURE_INVALID_PORT; + + prop->index = iport->logical_port_index; + prop->phy_mask = sci_port_get_phys(iport); + sci_port_get_sas_address(iport, &prop->local.sas_address); + sci_port_get_protocols(iport, &prop->local.protocols); + sci_port_get_attached_sas_address(iport, &prop->remote.sas_address); + + return SCI_SUCCESS; +} + +static void sci_port_bcn_enable(struct isci_port *iport) +{ + struct isci_phy *iphy; + u32 val; + int i; + + for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) { + iphy = iport->phy_table[i]; + if (!iphy) + continue; + val = readl(&iphy->link_layer_registers->link_layer_control); + /* clear the bit by writing 1. */ + writel(val, &iphy->link_layer_registers->link_layer_control); + } +} + +/* called under sci_lock to stabilize phy:port associations */ +void isci_port_bcn_enable(struct isci_host *ihost, struct isci_port *iport) +{ + int i; + + clear_bit(IPORT_BCN_BLOCKED, &iport->flags); + wake_up(&ihost->eventq); + + if (!test_and_clear_bit(IPORT_BCN_PENDING, &iport->flags)) + return; + + for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) { + struct isci_phy *iphy = iport->phy_table[i]; + + if (!iphy) + continue; + + ihost->sas_ha.notify_port_event(&iphy->sas_phy, + PORTE_BROADCAST_RCVD); + break; + } +} + +static void isci_port_bc_change_received(struct isci_host *ihost, + struct isci_port *iport, + struct isci_phy *iphy) +{ + if (iport && test_bit(IPORT_BCN_BLOCKED, &iport->flags)) { + dev_dbg(&ihost->pdev->dev, + "%s: disabled BCN; isci_phy = %p, sas_phy = %p\n", + __func__, iphy, &iphy->sas_phy); + set_bit(IPORT_BCN_PENDING, &iport->flags); + atomic_inc(&iport->event); + wake_up(&ihost->eventq); + } else { + dev_dbg(&ihost->pdev->dev, + "%s: isci_phy = %p, sas_phy = %p\n", + __func__, iphy, &iphy->sas_phy); + + ihost->sas_ha.notify_port_event(&iphy->sas_phy, + PORTE_BROADCAST_RCVD); + } + sci_port_bcn_enable(iport); +} + +static void isci_port_link_up(struct isci_host *isci_host, + struct isci_port *iport, + struct isci_phy *iphy) +{ + unsigned long flags; + struct sci_port_properties properties; + unsigned long success = true; + + BUG_ON(iphy->isci_port != NULL); + + iphy->isci_port = iport; + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_port = %p\n", + __func__, iport); + + spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); + + isci_port_change_state(iphy->isci_port, isci_starting); + + sci_port_get_properties(iport, &properties); + + if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) { + u64 attached_sas_address; + + iphy->sas_phy.oob_mode = SATA_OOB_MODE; + iphy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis); + + /* + * For direct-attached SATA devices, the SCI core will + * automagically assign a SAS address to the end device + * for the purpose of creating a port. This SAS address + * will not be the same as assigned to the PHY and needs + * to be obtained from struct sci_port_properties properties. + */ + attached_sas_address = properties.remote.sas_address.high; + attached_sas_address <<= 32; + attached_sas_address |= properties.remote.sas_address.low; + swab64s(&attached_sas_address); + + memcpy(&iphy->sas_phy.attached_sas_addr, + &attached_sas_address, sizeof(attached_sas_address)); + } else if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) { + iphy->sas_phy.oob_mode = SAS_OOB_MODE; + iphy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame); + + /* Copy the attached SAS address from the IAF */ + memcpy(iphy->sas_phy.attached_sas_addr, + iphy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE); + } else { + dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__); + success = false; + } + + iphy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(iphy); + + spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); + + /* Notify libsas that we have an address frame, if indeed + * we've found an SSP, SMP, or STP target */ + if (success) + isci_host->sas_ha.notify_port_event(&iphy->sas_phy, + PORTE_BYTES_DMAED); +} + + +/** + * isci_port_link_down() - This function is called by the sci core when a link + * becomes inactive. + * @isci_host: This parameter specifies the isci host object. + * @phy: This parameter specifies the isci phy with the active link. + * @port: This parameter specifies the isci port with the active link. + * + */ +static void isci_port_link_down(struct isci_host *isci_host, + struct isci_phy *isci_phy, + struct isci_port *isci_port) +{ + struct isci_remote_device *isci_device; + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_port = %p\n", __func__, isci_port); + + if (isci_port) { + + /* check to see if this is the last phy on this port. */ + if (isci_phy->sas_phy.port && + isci_phy->sas_phy.port->num_phys == 1) { + atomic_inc(&isci_port->event); + isci_port_bcn_enable(isci_host, isci_port); + + /* change the state for all devices on this port. The + * next task sent to this device will be returned as + * SAS_TASK_UNDELIVERED, and the scsi mid layer will + * remove the target + */ + list_for_each_entry(isci_device, + &isci_port->remote_dev_list, + node) { + dev_dbg(&isci_host->pdev->dev, + "%s: isci_device = %p\n", + __func__, isci_device); + set_bit(IDEV_GONE, &isci_device->flags); + } + } + isci_port_change_state(isci_port, isci_stopping); + } + + /* Notify libsas of the borken link, this will trigger calls to our + * isci_port_deformed and isci_dev_gone functions. + */ + sas_phy_disconnected(&isci_phy->sas_phy); + isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy, + PHYE_LOSS_OF_SIGNAL); + + isci_phy->isci_port = NULL; + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_port = %p - Done\n", __func__, isci_port); +} + + +/** + * isci_port_ready() - This function is called by the sci core when a link + * becomes ready. + * @isci_host: This parameter specifies the isci host object. + * @port: This parameter specifies the sci port with the active link. + * + */ +static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) +{ + dev_dbg(&isci_host->pdev->dev, + "%s: isci_port = %p\n", __func__, isci_port); + + complete_all(&isci_port->start_complete); + isci_port_change_state(isci_port, isci_ready); + return; +} + +/** + * isci_port_not_ready() - This function is called by the sci core when a link + * is not ready. All remote devices on this link will be removed if they are + * in the stopping state. + * @isci_host: This parameter specifies the isci host object. + * @port: This parameter specifies the sci port with the active link. + * + */ +static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port) +{ + dev_dbg(&isci_host->pdev->dev, + "%s: isci_port = %p\n", __func__, isci_port); +} + +static void isci_port_stop_complete(struct isci_host *ihost, + struct isci_port *iport, + enum sci_status completion_status) +{ + dev_dbg(&ihost->pdev->dev, "Port stop complete\n"); +} + +/** + * isci_port_hard_reset_complete() - This function is called by the sci core + * when the hard reset complete notification has been received. + * @port: This parameter specifies the sci port with the active link. + * @completion_status: This parameter specifies the core status for the reset + * process. + * + */ +static void isci_port_hard_reset_complete(struct isci_port *isci_port, + enum sci_status completion_status) +{ + dev_dbg(&isci_port->isci_host->pdev->dev, + "%s: isci_port = %p, completion_status=%x\n", + __func__, isci_port, completion_status); + + /* Save the status of the hard reset from the port. */ + isci_port->hard_reset_status = completion_status; + + complete_all(&isci_port->hard_reset_complete); +} + +/* This method will return a true value if the specified phy can be assigned to + * this port The following is a list of phys for each port that are allowed: - + * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method + * doesn't preclude all configurations. It merely ensures that a phy is part + * of the allowable set of phy identifiers for that port. For example, one + * could assign phy 3 to port 0 and no other phys. Please refer to + * sci_port_is_phy_mask_valid() for information regarding whether the + * phy_mask for a port can be supported. bool true if this is a valid phy + * assignment for the port false if this is not a valid phy assignment for the + * port + */ +bool sci_port_is_valid_phy_assignment(struct isci_port *iport, u32 phy_index) +{ + struct isci_host *ihost = iport->owning_controller; + struct sci_user_parameters *user = &ihost->user_parameters; + + /* Initialize to invalid value. */ + u32 existing_phy_index = SCI_MAX_PHYS; + u32 index; + + if ((iport->physical_port_index == 1) && (phy_index != 1)) + return false; + + if (iport->physical_port_index == 3 && phy_index != 3) + return false; + + if (iport->physical_port_index == 2 && + (phy_index == 0 || phy_index == 1)) + return false; + + for (index = 0; index < SCI_MAX_PHYS; index++) + if (iport->phy_table[index] && index != phy_index) + existing_phy_index = index; + + /* Ensure that all of the phys in the port are capable of + * operating at the same maximum link rate. + */ + if (existing_phy_index < SCI_MAX_PHYS && + user->phys[phy_index].max_speed_generation != + user->phys[existing_phy_index].max_speed_generation) + return false; + + return true; +} + +/** + * + * @sci_port: This is the port object for which to determine if the phy mask + * can be supported. + * + * This method will return a true value if the port's phy mask can be supported + * by the SCU. The following is a list of valid PHY mask configurations for + * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2] + * - Port 3 - [3] This method returns a boolean indication specifying if the + * phy mask can be supported. true if this is a valid phy assignment for the + * port false if this is not a valid phy assignment for the port + */ +static bool sci_port_is_phy_mask_valid( + struct isci_port *iport, + u32 phy_mask) +{ + if (iport->physical_port_index == 0) { + if (((phy_mask & 0x0F) == 0x0F) + || ((phy_mask & 0x03) == 0x03) + || ((phy_mask & 0x01) == 0x01) + || (phy_mask == 0)) + return true; + } else if (iport->physical_port_index == 1) { + if (((phy_mask & 0x02) == 0x02) + || (phy_mask == 0)) + return true; + } else if (iport->physical_port_index == 2) { + if (((phy_mask & 0x0C) == 0x0C) + || ((phy_mask & 0x04) == 0x04) + || (phy_mask == 0)) + return true; + } else if (iport->physical_port_index == 3) { + if (((phy_mask & 0x08) == 0x08) + || (phy_mask == 0)) + return true; + } + + return false; +} + +/* + * This method retrieves a currently active (i.e. connected) phy contained in + * the port. Currently, the lowest order phy that is connected is returned. + * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is + * returned if there are no currently active (i.e. connected to a remote end + * point) phys contained in the port. All other values specify a struct sci_phy + * object that is active in the port. + */ +static struct isci_phy *sci_port_get_a_connected_phy(struct isci_port *iport) +{ + u32 index; + struct isci_phy *iphy; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + /* Ensure that the phy is both part of the port and currently + * connected to the remote end-point. + */ + iphy = iport->phy_table[index]; + if (iphy && sci_port_active_phy(iport, iphy)) + return iphy; + } + + return NULL; +} + +static enum sci_status sci_port_set_phy(struct isci_port *iport, struct isci_phy *iphy) +{ + /* Check to see if we can add this phy to a port + * that means that the phy is not part of a port and that the port does + * not already have a phy assinged to the phy index. + */ + if (!iport->phy_table[iphy->phy_index] && + !phy_get_non_dummy_port(iphy) && + sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) { + /* Phy is being added in the stopped state so we are in MPC mode + * make logical port index = physical port index + */ + iport->logical_port_index = iport->physical_port_index; + iport->phy_table[iphy->phy_index] = iphy; + sci_phy_set_port(iphy, iport); + + return SCI_SUCCESS; + } + + return SCI_FAILURE; +} + +static enum sci_status sci_port_clear_phy(struct isci_port *iport, struct isci_phy *iphy) +{ + /* Make sure that this phy is part of this port */ + if (iport->phy_table[iphy->phy_index] == iphy && + phy_get_non_dummy_port(iphy) == iport) { + struct isci_host *ihost = iport->owning_controller; + + /* Yep it is assigned to this port so remove it */ + sci_phy_set_port(iphy, &ihost->ports[SCI_MAX_PORTS]); + iport->phy_table[iphy->phy_index] = NULL; + return SCI_SUCCESS; + } + + return SCI_FAILURE; +} + +void sci_port_get_sas_address(struct isci_port *iport, struct sci_sas_address *sas) +{ + u32 index; + + sas->high = 0; + sas->low = 0; + for (index = 0; index < SCI_MAX_PHYS; index++) + if (iport->phy_table[index]) + sci_phy_get_sas_address(iport->phy_table[index], sas); +} + +void sci_port_get_attached_sas_address(struct isci_port *iport, struct sci_sas_address *sas) +{ + struct isci_phy *iphy; + + /* + * Ensure that the phy is both part of the port and currently + * connected to the remote end-point. + */ + iphy = sci_port_get_a_connected_phy(iport); + if (iphy) { + if (iphy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) { + sci_phy_get_attached_sas_address(iphy, sas); + } else { + sci_phy_get_sas_address(iphy, sas); + sas->low += iphy->phy_index; + } + } else { + sas->high = 0; + sas->low = 0; + } +} + +/** + * sci_port_construct_dummy_rnc() - create dummy rnc for si workaround + * + * @sci_port: logical port on which we need to create the remote node context + * @rni: remote node index for this remote node context. + * + * This routine will construct a dummy remote node context data structure + * This structure will be posted to the hardware to work around a scheduler + * error in the hardware. + */ +static void sci_port_construct_dummy_rnc(struct isci_port *iport, u16 rni) +{ + union scu_remote_node_context *rnc; + + rnc = &iport->owning_controller->remote_node_context_table[rni]; + + memset(rnc, 0, sizeof(union scu_remote_node_context)); + + rnc->ssp.remote_sas_address_hi = 0; + rnc->ssp.remote_sas_address_lo = 0; + + rnc->ssp.remote_node_index = rni; + rnc->ssp.remote_node_port_width = 1; + rnc->ssp.logical_port_index = iport->physical_port_index; + + rnc->ssp.nexus_loss_timer_enable = false; + rnc->ssp.check_bit = false; + rnc->ssp.is_valid = true; + rnc->ssp.is_remote_node_context = true; + rnc->ssp.function_number = 0; + rnc->ssp.arbitration_wait_time = 0; +} + +/* + * construct a dummy task context data structure. This + * structure will be posted to the hardwre to work around a scheduler error + * in the hardware. + */ +static void sci_port_construct_dummy_task(struct isci_port *iport, u16 tag) +{ + struct isci_host *ihost = iport->owning_controller; + struct scu_task_context *task_context; + + task_context = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; + memset(task_context, 0, sizeof(struct scu_task_context)); + + task_context->initiator_request = 1; + task_context->connection_rate = 1; + task_context->logical_port_index = iport->physical_port_index; + task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; + task_context->task_index = ISCI_TAG_TCI(tag); + task_context->valid = SCU_TASK_CONTEXT_VALID; + task_context->context_type = SCU_TASK_CONTEXT_TYPE; + task_context->remote_node_index = iport->reserved_rni; + task_context->do_not_dma_ssp_good_response = 1; + task_context->task_phase = 0x01; +} + +static void sci_port_destroy_dummy_resources(struct isci_port *iport) +{ + struct isci_host *ihost = iport->owning_controller; + + if (iport->reserved_tag != SCI_CONTROLLER_INVALID_IO_TAG) + isci_free_tag(ihost, iport->reserved_tag); + + if (iport->reserved_rni != SCU_DUMMY_INDEX) + sci_remote_node_table_release_remote_node_index(&ihost->available_remote_nodes, + 1, iport->reserved_rni); + + iport->reserved_rni = SCU_DUMMY_INDEX; + iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG; +} + +void sci_port_setup_transports(struct isci_port *iport, u32 device_id) +{ + u8 index; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (iport->active_phy_mask & (1 << index)) + sci_phy_setup_transport(iport->phy_table[index], device_id); + } +} + +static void sci_port_activate_phy(struct isci_port *iport, struct isci_phy *iphy, + bool do_notify_user) +{ + struct isci_host *ihost = iport->owning_controller; + + if (iphy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) + sci_phy_resume(iphy); + + iport->active_phy_mask |= 1 << iphy->phy_index; + + sci_controller_clear_invalid_phy(ihost, iphy); + + if (do_notify_user == true) + isci_port_link_up(ihost, iport, iphy); +} + +void sci_port_deactivate_phy(struct isci_port *iport, struct isci_phy *iphy, + bool do_notify_user) +{ + struct isci_host *ihost = iport->owning_controller; + + iport->active_phy_mask &= ~(1 << iphy->phy_index); + + iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; + + /* Re-assign the phy back to the LP as if it were a narrow port */ + writel(iphy->phy_index, + &iport->port_pe_configuration_register[iphy->phy_index]); + + if (do_notify_user == true) + isci_port_link_down(ihost, iphy, iport); +} + +static void sci_port_invalid_link_up(struct isci_port *iport, struct isci_phy *iphy) +{ + struct isci_host *ihost = iport->owning_controller; + + /* + * Check to see if we have alreay reported this link as bad and if + * not go ahead and tell the SCI_USER that we have discovered an + * invalid link. + */ + if ((ihost->invalid_phy_mask & (1 << iphy->phy_index)) == 0) { + ihost->invalid_phy_mask |= 1 << iphy->phy_index; + dev_warn(&ihost->pdev->dev, "Invalid link up!\n"); + } +} + +static bool is_port_ready_state(enum sci_port_states state) +{ + switch (state) { + case SCI_PORT_READY: + case SCI_PORT_SUB_WAITING: + case SCI_PORT_SUB_OPERATIONAL: + case SCI_PORT_SUB_CONFIGURING: + return true; + default: + return false; + } +} + +/* flag dummy rnc hanling when exiting a ready state */ +static void port_state_machine_change(struct isci_port *iport, + enum sci_port_states state) +{ + struct sci_base_state_machine *sm = &iport->sm; + enum sci_port_states old_state = sm->current_state_id; + + if (is_port_ready_state(old_state) && !is_port_ready_state(state)) + iport->ready_exit = true; + + sci_change_state(sm, state); + iport->ready_exit = false; +} + +/** + * sci_port_general_link_up_handler - phy can be assigned to port? + * @sci_port: sci_port object for which has a phy that has gone link up. + * @sci_phy: This is the struct isci_phy object that has gone link up. + * @do_notify_user: This parameter specifies whether to inform the user (via + * sci_port_link_up()) as to the fact that a new phy as become ready. + * + * Determine if this phy can be assigned to this + * port . If the phy is not a valid PHY for + * this port then the function will notify the user. A PHY can only be + * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in + * the same port. none + */ +static void sci_port_general_link_up_handler(struct isci_port *iport, + struct isci_phy *iphy, + bool do_notify_user) +{ + struct sci_sas_address port_sas_address; + struct sci_sas_address phy_sas_address; + + sci_port_get_attached_sas_address(iport, &port_sas_address); + sci_phy_get_attached_sas_address(iphy, &phy_sas_address); + + /* If the SAS address of the new phy matches the SAS address of + * other phys in the port OR this is the first phy in the port, + * then activate the phy and allow it to be used for operations + * in this port. + */ + if ((phy_sas_address.high == port_sas_address.high && + phy_sas_address.low == port_sas_address.low) || + iport->active_phy_mask == 0) { + struct sci_base_state_machine *sm = &iport->sm; + + sci_port_activate_phy(iport, iphy, do_notify_user); + if (sm->current_state_id == SCI_PORT_RESETTING) + port_state_machine_change(iport, SCI_PORT_READY); + } else + sci_port_invalid_link_up(iport, iphy); +} + + + +/** + * This method returns false if the port only has a single phy object assigned. + * If there are no phys or more than one phy then the method will return + * true. + * @sci_port: The port for which the wide port condition is to be checked. + * + * bool true Is returned if this is a wide ported port. false Is returned if + * this is a narrow port. + */ +static bool sci_port_is_wide(struct isci_port *iport) +{ + u32 index; + u32 phy_count = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (iport->phy_table[index] != NULL) { + phy_count++; + } + } + + return phy_count != 1; +} + +/** + * This method is called by the PHY object when the link is detected. if the + * port wants the PHY to continue on to the link up state then the port + * layer must return true. If the port object returns false the phy object + * must halt its attempt to go link up. + * @sci_port: The port associated with the phy object. + * @sci_phy: The phy object that is trying to go link up. + * + * true if the phy object can continue to the link up condition. true Is + * returned if this phy can continue to the ready state. false Is returned if + * can not continue on to the ready state. This notification is in place for + * wide ports and direct attached phys. Since there are no wide ported SATA + * devices this could become an invalid port configuration. + */ +bool sci_port_link_detected( + struct isci_port *iport, + struct isci_phy *iphy) +{ + if ((iport->logical_port_index != SCIC_SDS_DUMMY_PORT) && + (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) && + sci_port_is_wide(iport)) { + sci_port_invalid_link_up(iport, iphy); + + return false; + } + + return true; +} + +static void port_timeout(unsigned long data) +{ + struct sci_timer *tmr = (struct sci_timer *)data; + struct isci_port *iport = container_of(tmr, typeof(*iport), timer); + struct isci_host *ihost = iport->owning_controller; + unsigned long flags; + u32 current_state; + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmr->cancel) + goto done; + + current_state = iport->sm.current_state_id; + + if (current_state == SCI_PORT_RESETTING) { + /* if the port is still in the resetting state then the timeout + * fired before the reset completed. + */ + port_state_machine_change(iport, SCI_PORT_FAILED); + } else if (current_state == SCI_PORT_STOPPED) { + /* if the port is stopped then the start request failed In this + * case stay in the stopped state. + */ + dev_err(sciport_to_dev(iport), + "%s: SCIC Port 0x%p failed to stop before tiemout.\n", + __func__, + iport); + } else if (current_state == SCI_PORT_STOPPING) { + /* if the port is still stopping then the stop has not completed */ + isci_port_stop_complete(iport->owning_controller, + iport, + SCI_FAILURE_TIMEOUT); + } else { + /* The port is in the ready state and we have a timer + * reporting a timeout this should not happen. + */ + dev_err(sciport_to_dev(iport), + "%s: SCIC Port 0x%p is processing a timeout operation " + "in state %d.\n", __func__, iport, current_state); + } + +done: + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +/* --------------------------------------------------------------------------- */ + +/** + * This function updates the hardwares VIIT entry for this port. + * + * + */ +static void sci_port_update_viit_entry(struct isci_port *iport) +{ + struct sci_sas_address sas_address; + + sci_port_get_sas_address(iport, &sas_address); + + writel(sas_address.high, + &iport->viit_registers->initiator_sas_address_hi); + writel(sas_address.low, + &iport->viit_registers->initiator_sas_address_lo); + + /* This value get cleared just in case its not already cleared */ + writel(0, &iport->viit_registers->reserved); + + /* We are required to update the status register last */ + writel(SCU_VIIT_ENTRY_ID_VIIT | + SCU_VIIT_IPPT_INITIATOR | + ((1 << iport->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | + SCU_VIIT_STATUS_ALL_VALID, + &iport->viit_registers->status); +} + +enum sas_linkrate sci_port_get_max_allowed_speed(struct isci_port *iport) +{ + u16 index; + struct isci_phy *iphy; + enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; + + /* + * Loop through all of the phys in this port and find the phy with the + * lowest maximum link rate. */ + for (index = 0; index < SCI_MAX_PHYS; index++) { + iphy = iport->phy_table[index]; + if (iphy && sci_port_active_phy(iport, iphy) && + iphy->max_negotiated_speed < max_allowed_speed) + max_allowed_speed = iphy->max_negotiated_speed; + } + + return max_allowed_speed; +} + +static void sci_port_suspend_port_task_scheduler(struct isci_port *iport) +{ + u32 pts_control_value; + + pts_control_value = readl(&iport->port_task_scheduler_registers->control); + pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &iport->port_task_scheduler_registers->control); +} + +/** + * sci_port_post_dummy_request() - post dummy/workaround request + * @sci_port: port to post task + * + * Prevent the hardware scheduler from posting new requests to the front + * of the scheduler queue causing a starvation problem for currently + * ongoing requests. + * + */ +static void sci_port_post_dummy_request(struct isci_port *iport) +{ + struct isci_host *ihost = iport->owning_controller; + u16 tag = iport->reserved_tag; + struct scu_task_context *tc; + u32 command; + + tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; + tc->abort = 0; + + command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | + ISCI_TAG_TCI(tag); + + sci_controller_post_request(ihost, command); +} + +/** + * This routine will abort the dummy request. This will alow the hardware to + * power down parts of the silicon to save power. + * + * @sci_port: The port on which the task must be aborted. + * + */ +static void sci_port_abort_dummy_request(struct isci_port *iport) +{ + struct isci_host *ihost = iport->owning_controller; + u16 tag = iport->reserved_tag; + struct scu_task_context *tc; + u32 command; + + tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; + tc->abort = 1; + + command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | + iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | + ISCI_TAG_TCI(tag); + + sci_controller_post_request(ihost, command); +} + +/** + * + * @sci_port: This is the struct isci_port object to resume. + * + * This method will resume the port task scheduler for this port object. none + */ +static void +sci_port_resume_port_task_scheduler(struct isci_port *iport) +{ + u32 pts_control_value; + + pts_control_value = readl(&iport->port_task_scheduler_registers->control); + pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &iport->port_task_scheduler_registers->control); +} + +static void sci_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + + sci_port_suspend_port_task_scheduler(iport); + + iport->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; + + if (iport->active_phy_mask != 0) { + /* At least one of the phys on the port is ready */ + port_state_machine_change(iport, + SCI_PORT_SUB_OPERATIONAL); + } +} + +static void sci_port_ready_substate_operational_enter(struct sci_base_state_machine *sm) +{ + u32 index; + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + struct isci_host *ihost = iport->owning_controller; + + isci_port_ready(ihost, iport); + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (iport->phy_table[index]) { + writel(iport->physical_port_index, + &iport->port_pe_configuration_register[ + iport->phy_table[index]->phy_index]); + } + } + + sci_port_update_viit_entry(iport); + + sci_port_resume_port_task_scheduler(iport); + + /* + * Post the dummy task for the port so the hardware can schedule + * io correctly + */ + sci_port_post_dummy_request(iport); +} + +static void sci_port_invalidate_dummy_remote_node(struct isci_port *iport) +{ + struct isci_host *ihost = iport->owning_controller; + u8 phys_index = iport->physical_port_index; + union scu_remote_node_context *rnc; + u16 rni = iport->reserved_rni; + u32 command; + + rnc = &ihost->remote_node_context_table[rni]; + + rnc->ssp.is_valid = false; + + /* ensure the preceding tc abort request has reached the + * controller and give it ample time to act before posting the rnc + * invalidate + */ + readl(&ihost->smu_registers->interrupt_status); /* flush */ + udelay(10); + + command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + sci_controller_post_request(ihost, command); +} + +/** + * + * @object: This is the object which is cast to a struct isci_port object. + * + * This method will perform the actions required by the struct isci_port on + * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports + * the port not ready and suspends the port task scheduler. none + */ +static void sci_port_ready_substate_operational_exit(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + struct isci_host *ihost = iport->owning_controller; + + /* + * Kill the dummy task for this port if it has not yet posted + * the hardware will treat this as a NOP and just return abort + * complete. + */ + sci_port_abort_dummy_request(iport); + + isci_port_not_ready(ihost, iport); + + if (iport->ready_exit) + sci_port_invalidate_dummy_remote_node(iport); +} + +static void sci_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + struct isci_host *ihost = iport->owning_controller; + + if (iport->active_phy_mask == 0) { + isci_port_not_ready(ihost, iport); + + port_state_machine_change(iport, + SCI_PORT_SUB_WAITING); + } else if (iport->started_request_count == 0) + port_state_machine_change(iport, + SCI_PORT_SUB_OPERATIONAL); +} + +static void sci_port_ready_substate_configuring_exit(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + + sci_port_suspend_port_task_scheduler(iport); + if (iport->ready_exit) + sci_port_invalidate_dummy_remote_node(iport); +} + +enum sci_status sci_port_start(struct isci_port *iport) +{ + struct isci_host *ihost = iport->owning_controller; + enum sci_status status = SCI_SUCCESS; + enum sci_port_states state; + u32 phy_mask; + + state = iport->sm.current_state_id; + if (state != SCI_PORT_STOPPED) { + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + if (iport->assigned_device_count > 0) { + /* TODO This is a start failure operation because + * there are still devices assigned to this port. + * There must be no devices assigned to a port on a + * start operation. + */ + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + if (iport->reserved_rni == SCU_DUMMY_INDEX) { + u16 rni = sci_remote_node_table_allocate_remote_node( + &ihost->available_remote_nodes, 1); + + if (rni != SCU_DUMMY_INDEX) + sci_port_construct_dummy_rnc(iport, rni); + else + status = SCI_FAILURE_INSUFFICIENT_RESOURCES; + iport->reserved_rni = rni; + } + + if (iport->reserved_tag == SCI_CONTROLLER_INVALID_IO_TAG) { + u16 tag; + + tag = isci_alloc_tag(ihost); + if (tag == SCI_CONTROLLER_INVALID_IO_TAG) + status = SCI_FAILURE_INSUFFICIENT_RESOURCES; + else + sci_port_construct_dummy_task(iport, tag); + iport->reserved_tag = tag; + } + + if (status == SCI_SUCCESS) { + phy_mask = sci_port_get_phys(iport); + + /* + * There are one or more phys assigned to this port. Make sure + * the port's phy mask is in fact legal and supported by the + * silicon. + */ + if (sci_port_is_phy_mask_valid(iport, phy_mask) == true) { + port_state_machine_change(iport, + SCI_PORT_READY); + + return SCI_SUCCESS; + } + status = SCI_FAILURE; + } + + if (status != SCI_SUCCESS) + sci_port_destroy_dummy_resources(iport); + + return status; +} + +enum sci_status sci_port_stop(struct isci_port *iport) +{ + enum sci_port_states state; + + state = iport->sm.current_state_id; + switch (state) { + case SCI_PORT_STOPPED: + return SCI_SUCCESS; + case SCI_PORT_SUB_WAITING: + case SCI_PORT_SUB_OPERATIONAL: + case SCI_PORT_SUB_CONFIGURING: + case SCI_PORT_RESETTING: + port_state_machine_change(iport, + SCI_PORT_STOPPING); + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout) +{ + enum sci_status status = SCI_FAILURE_INVALID_PHY; + struct isci_phy *iphy = NULL; + enum sci_port_states state; + u32 phy_index; + + state = iport->sm.current_state_id; + if (state != SCI_PORT_SUB_OPERATIONAL) { + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + /* Select a phy on which we can send the hard reset request. */ + for (phy_index = 0; phy_index < SCI_MAX_PHYS && !iphy; phy_index++) { + iphy = iport->phy_table[phy_index]; + if (iphy && !sci_port_active_phy(iport, iphy)) { + /* + * We found a phy but it is not ready select + * different phy + */ + iphy = NULL; + } + } + + /* If we have a phy then go ahead and start the reset procedure */ + if (!iphy) + return status; + status = sci_phy_reset(iphy); + + if (status != SCI_SUCCESS) + return status; + + sci_mod_timer(&iport->timer, timeout); + iport->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; + + port_state_machine_change(iport, SCI_PORT_RESETTING); + return SCI_SUCCESS; +} + +/** + * sci_port_add_phy() - + * @sci_port: This parameter specifies the port in which the phy will be added. + * @sci_phy: This parameter is the phy which is to be added to the port. + * + * This method will add a PHY to the selected port. This method returns an + * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other + * status is a failure to add the phy to the port. + */ +enum sci_status sci_port_add_phy(struct isci_port *iport, + struct isci_phy *iphy) +{ + enum sci_status status; + enum sci_port_states state; + + state = iport->sm.current_state_id; + switch (state) { + case SCI_PORT_STOPPED: { + struct sci_sas_address port_sas_address; + + /* Read the port assigned SAS Address if there is one */ + sci_port_get_sas_address(iport, &port_sas_address); + + if (port_sas_address.high != 0 && port_sas_address.low != 0) { + struct sci_sas_address phy_sas_address; + + /* Make sure that the PHY SAS Address matches the SAS Address + * for this port + */ + sci_phy_get_sas_address(iphy, &phy_sas_address); + + if (port_sas_address.high != phy_sas_address.high || + port_sas_address.low != phy_sas_address.low) + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + return sci_port_set_phy(iport, iphy); + } + case SCI_PORT_SUB_WAITING: + case SCI_PORT_SUB_OPERATIONAL: + status = sci_port_set_phy(iport, iphy); + + if (status != SCI_SUCCESS) + return status; + + sci_port_general_link_up_handler(iport, iphy, true); + iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; + port_state_machine_change(iport, SCI_PORT_SUB_CONFIGURING); + + return status; + case SCI_PORT_SUB_CONFIGURING: + status = sci_port_set_phy(iport, iphy); + + if (status != SCI_SUCCESS) + return status; + sci_port_general_link_up_handler(iport, iphy, true); + + /* Re-enter the configuring state since this may be the last phy in + * the port. + */ + port_state_machine_change(iport, + SCI_PORT_SUB_CONFIGURING); + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +/** + * sci_port_remove_phy() - + * @sci_port: This parameter specifies the port in which the phy will be added. + * @sci_phy: This parameter is the phy which is to be added to the port. + * + * This method will remove the PHY from the selected PORT. This method returns + * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any + * other status is a failure to add the phy to the port. + */ +enum sci_status sci_port_remove_phy(struct isci_port *iport, + struct isci_phy *iphy) +{ + enum sci_status status; + enum sci_port_states state; + + state = iport->sm.current_state_id; + + switch (state) { + case SCI_PORT_STOPPED: + return sci_port_clear_phy(iport, iphy); + case SCI_PORT_SUB_OPERATIONAL: + status = sci_port_clear_phy(iport, iphy); + if (status != SCI_SUCCESS) + return status; + + sci_port_deactivate_phy(iport, iphy, true); + iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; + port_state_machine_change(iport, + SCI_PORT_SUB_CONFIGURING); + return SCI_SUCCESS; + case SCI_PORT_SUB_CONFIGURING: + status = sci_port_clear_phy(iport, iphy); + + if (status != SCI_SUCCESS) + return status; + sci_port_deactivate_phy(iport, iphy, true); + + /* Re-enter the configuring state since this may be the last phy in + * the port + */ + port_state_machine_change(iport, + SCI_PORT_SUB_CONFIGURING); + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status sci_port_link_up(struct isci_port *iport, + struct isci_phy *iphy) +{ + enum sci_port_states state; + + state = iport->sm.current_state_id; + switch (state) { + case SCI_PORT_SUB_WAITING: + /* Since this is the first phy going link up for the port we + * can just enable it and continue + */ + sci_port_activate_phy(iport, iphy, true); + + port_state_machine_change(iport, + SCI_PORT_SUB_OPERATIONAL); + return SCI_SUCCESS; + case SCI_PORT_SUB_OPERATIONAL: + sci_port_general_link_up_handler(iport, iphy, true); + return SCI_SUCCESS; + case SCI_PORT_RESETTING: + /* TODO We should make sure that the phy that has gone + * link up is the same one on which we sent the reset. It is + * possible that the phy on which we sent the reset is not the + * one that has gone link up and we want to make sure that + * phy being reset comes back. Consider the case where a + * reset is sent but before the hardware processes the reset it + * get a link up on the port because of a hot plug event. + * because of the reset request this phy will go link down + * almost immediately. + */ + + /* In the resetting state we don't notify the user regarding + * link up and link down notifications. + */ + sci_port_general_link_up_handler(iport, iphy, false); + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status sci_port_link_down(struct isci_port *iport, + struct isci_phy *iphy) +{ + enum sci_port_states state; + + state = iport->sm.current_state_id; + switch (state) { + case SCI_PORT_SUB_OPERATIONAL: + sci_port_deactivate_phy(iport, iphy, true); + + /* If there are no active phys left in the port, then + * transition the port to the WAITING state until such time + * as a phy goes link up + */ + if (iport->active_phy_mask == 0) + port_state_machine_change(iport, + SCI_PORT_SUB_WAITING); + return SCI_SUCCESS; + case SCI_PORT_RESETTING: + /* In the resetting state we don't notify the user regarding + * link up and link down notifications. */ + sci_port_deactivate_phy(iport, iphy, false); + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status sci_port_start_io(struct isci_port *iport, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + enum sci_port_states state; + + state = iport->sm.current_state_id; + switch (state) { + case SCI_PORT_SUB_WAITING: + return SCI_FAILURE_INVALID_STATE; + case SCI_PORT_SUB_OPERATIONAL: + iport->started_request_count++; + return SCI_SUCCESS; + default: + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status sci_port_complete_io(struct isci_port *iport, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + enum sci_port_states state; + + state = iport->sm.current_state_id; + switch (state) { + case SCI_PORT_STOPPED: + dev_warn(sciport_to_dev(iport), + "%s: in wrong state: %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_PORT_STOPPING: + sci_port_decrement_request_count(iport); + + if (iport->started_request_count == 0) + port_state_machine_change(iport, + SCI_PORT_STOPPED); + break; + case SCI_PORT_READY: + case SCI_PORT_RESETTING: + case SCI_PORT_FAILED: + case SCI_PORT_SUB_WAITING: + case SCI_PORT_SUB_OPERATIONAL: + sci_port_decrement_request_count(iport); + break; + case SCI_PORT_SUB_CONFIGURING: + sci_port_decrement_request_count(iport); + if (iport->started_request_count == 0) { + port_state_machine_change(iport, + SCI_PORT_SUB_OPERATIONAL); + } + break; + } + return SCI_SUCCESS; +} + +static void sci_port_enable_port_task_scheduler(struct isci_port *iport) +{ + u32 pts_control_value; + + /* enable the port task scheduler in a suspended state */ + pts_control_value = readl(&iport->port_task_scheduler_registers->control); + pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &iport->port_task_scheduler_registers->control); +} + +static void sci_port_disable_port_task_scheduler(struct isci_port *iport) +{ + u32 pts_control_value; + + pts_control_value = readl(&iport->port_task_scheduler_registers->control); + pts_control_value &= + ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); + writel(pts_control_value, &iport->port_task_scheduler_registers->control); +} + +static void sci_port_post_dummy_remote_node(struct isci_port *iport) +{ + struct isci_host *ihost = iport->owning_controller; + u8 phys_index = iport->physical_port_index; + union scu_remote_node_context *rnc; + u16 rni = iport->reserved_rni; + u32 command; + + rnc = &ihost->remote_node_context_table[rni]; + rnc->ssp.is_valid = true; + + command = SCU_CONTEXT_COMMAND_POST_RNC_32 | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + sci_controller_post_request(ihost, command); + + /* ensure hardware has seen the post rnc command and give it + * ample time to act before sending the suspend + */ + readl(&ihost->smu_registers->interrupt_status); /* flush */ + udelay(10); + + command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + sci_controller_post_request(ihost, command); +} + +static void sci_port_stopped_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + + if (iport->sm.previous_state_id == SCI_PORT_STOPPING) { + /* + * If we enter this state becasuse of a request to stop + * the port then we want to disable the hardwares port + * task scheduler. */ + sci_port_disable_port_task_scheduler(iport); + } +} + +static void sci_port_stopped_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + + /* Enable and suspend the port task scheduler */ + sci_port_enable_port_task_scheduler(iport); +} + +static void sci_port_ready_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + struct isci_host *ihost = iport->owning_controller; + u32 prev_state; + + prev_state = iport->sm.previous_state_id; + if (prev_state == SCI_PORT_RESETTING) + isci_port_hard_reset_complete(iport, SCI_SUCCESS); + else + isci_port_not_ready(ihost, iport); + + /* Post and suspend the dummy remote node context for this port. */ + sci_port_post_dummy_remote_node(iport); + + /* Start the ready substate machine */ + port_state_machine_change(iport, + SCI_PORT_SUB_WAITING); +} + +static void sci_port_resetting_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + + sci_del_timer(&iport->timer); +} + +static void sci_port_stopping_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + + sci_del_timer(&iport->timer); + + sci_port_destroy_dummy_resources(iport); +} + +static void sci_port_failed_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_port *iport = container_of(sm, typeof(*iport), sm); + + isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); +} + +/* --------------------------------------------------------------------------- */ + +static const struct sci_base_state sci_port_state_table[] = { + [SCI_PORT_STOPPED] = { + .enter_state = sci_port_stopped_state_enter, + .exit_state = sci_port_stopped_state_exit + }, + [SCI_PORT_STOPPING] = { + .exit_state = sci_port_stopping_state_exit + }, + [SCI_PORT_READY] = { + .enter_state = sci_port_ready_state_enter, + }, + [SCI_PORT_SUB_WAITING] = { + .enter_state = sci_port_ready_substate_waiting_enter, + }, + [SCI_PORT_SUB_OPERATIONAL] = { + .enter_state = sci_port_ready_substate_operational_enter, + .exit_state = sci_port_ready_substate_operational_exit + }, + [SCI_PORT_SUB_CONFIGURING] = { + .enter_state = sci_port_ready_substate_configuring_enter, + .exit_state = sci_port_ready_substate_configuring_exit + }, + [SCI_PORT_RESETTING] = { + .exit_state = sci_port_resetting_state_exit + }, + [SCI_PORT_FAILED] = { + .enter_state = sci_port_failed_state_enter, + } +}; + +void sci_port_construct(struct isci_port *iport, u8 index, + struct isci_host *ihost) +{ + sci_init_sm(&iport->sm, sci_port_state_table, SCI_PORT_STOPPED); + + iport->logical_port_index = SCIC_SDS_DUMMY_PORT; + iport->physical_port_index = index; + iport->active_phy_mask = 0; + iport->ready_exit = false; + + iport->owning_controller = ihost; + + iport->started_request_count = 0; + iport->assigned_device_count = 0; + + iport->reserved_rni = SCU_DUMMY_INDEX; + iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG; + + sci_init_timer(&iport->timer, port_timeout); + + iport->port_task_scheduler_registers = NULL; + + for (index = 0; index < SCI_MAX_PHYS; index++) + iport->phy_table[index] = NULL; +} + +void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) +{ + INIT_LIST_HEAD(&iport->remote_dev_list); + INIT_LIST_HEAD(&iport->domain_dev_list); + spin_lock_init(&iport->state_lock); + init_completion(&iport->start_complete); + iport->isci_host = ihost; + isci_port_change_state(iport, isci_freed); + atomic_set(&iport->event, 0); +} + +/** + * isci_port_get_state() - This function gets the status of the port object. + * @isci_port: This parameter points to the isci_port object + * + * status of the object as a isci_status enum. + */ +enum isci_status isci_port_get_state( + struct isci_port *isci_port) +{ + return isci_port->status; +} + +void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy *iphy) +{ + struct isci_host *ihost = iport->owning_controller; + + /* notify the user. */ + isci_port_bc_change_received(ihost, iport, iphy); +} + +int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, + struct isci_phy *iphy) +{ + unsigned long flags; + enum sci_status status; + int idx, ret = TMF_RESP_FUNC_COMPLETE; + + dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n", + __func__, iport); + + init_completion(&iport->hard_reset_complete); + + spin_lock_irqsave(&ihost->scic_lock, flags); + + #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT + status = sci_port_hard_reset(iport, ISCI_PORT_RESET_TIMEOUT); + + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (status == SCI_SUCCESS) { + wait_for_completion(&iport->hard_reset_complete); + + dev_dbg(&ihost->pdev->dev, + "%s: iport = %p; hard reset completion\n", + __func__, iport); + + if (iport->hard_reset_status != SCI_SUCCESS) + ret = TMF_RESP_FUNC_FAILED; + } else { + ret = TMF_RESP_FUNC_FAILED; + + dev_err(&ihost->pdev->dev, + "%s: iport = %p; sci_port_hard_reset call" + " failed 0x%x\n", + __func__, iport, status); + + } + + /* If the hard reset for the port has failed, consider this + * the same as link failures on all phys in the port. + */ + if (ret != TMF_RESP_FUNC_COMPLETE) { + + dev_err(&ihost->pdev->dev, + "%s: iport = %p; hard reset failed " + "(0x%x) - driving explicit link fail for all phys\n", + __func__, iport, iport->hard_reset_status); + + /* Down all phys in the port. */ + spin_lock_irqsave(&ihost->scic_lock, flags); + for (idx = 0; idx < SCI_MAX_PHYS; ++idx) { + struct isci_phy *iphy = iport->phy_table[idx]; + + if (!iphy) + continue; + sci_phy_stop(iphy); + sci_phy_start(iphy); + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); + } + return ret; +} + +/** + * isci_port_deformed() - This function is called by libsas when a port becomes + * inactive. + * @phy: This parameter specifies the libsas phy with the inactive port. + * + */ +void isci_port_deformed(struct asd_sas_phy *phy) +{ + pr_debug("%s: sas_phy = %p\n", __func__, phy); +} + +/** + * isci_port_formed() - This function is called by libsas when a port becomes + * active. + * @phy: This parameter specifies the libsas phy with the active port. + * + */ +void isci_port_formed(struct asd_sas_phy *phy) +{ + pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port); +} diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h new file mode 100644 index 000000000000..b50ecd4e8f9c --- /dev/null +++ b/drivers/scsi/isci/port.h @@ -0,0 +1,306 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _ISCI_PORT_H_ +#define _ISCI_PORT_H_ + +#include <scsi/libsas.h> +#include "isci.h" +#include "sas.h" +#include "phy.h" + +#define SCIC_SDS_DUMMY_PORT 0xFF + +struct isci_phy; +struct isci_host; + +enum isci_status { + isci_freed = 0x00, + isci_starting = 0x01, + isci_ready = 0x02, + isci_ready_for_io = 0x03, + isci_stopping = 0x04, + isci_stopped = 0x05, +}; + +/** + * struct isci_port - isci direct attached sas port object + * @event: counts bcns and port stop events (for bcn filtering) + * @ready_exit: several states constitute 'ready'. When exiting ready we + * need to take extra port-teardown actions that are + * skipped when exiting to another 'ready' state. + * @logical_port_index: software port index + * @physical_port_index: hardware port index + * @active_phy_mask: identifies phy members + * @reserved_tag: + * @reserved_rni: reserver for port task scheduler workaround + * @started_request_count: reference count for outstanding commands + * @not_ready_reason: set during state transitions and notified + * @timer: timeout start/stop operations + */ +struct isci_port { + enum isci_status status; + #define IPORT_BCN_BLOCKED 0 + #define IPORT_BCN_PENDING 1 + unsigned long flags; + atomic_t event; + struct isci_host *isci_host; + struct asd_sas_port sas_port; + struct list_head remote_dev_list; + spinlock_t state_lock; + struct list_head domain_dev_list; + struct completion start_complete; + struct completion hard_reset_complete; + enum sci_status hard_reset_status; + struct sci_base_state_machine sm; + bool ready_exit; + u8 logical_port_index; + u8 physical_port_index; + u8 active_phy_mask; + u16 reserved_rni; + u16 reserved_tag; + u32 started_request_count; + u32 assigned_device_count; + u32 not_ready_reason; + struct isci_phy *phy_table[SCI_MAX_PHYS]; + struct isci_host *owning_controller; + struct sci_timer timer; + struct scu_port_task_scheduler_registers __iomem *port_task_scheduler_registers; + /* XXX rework: only one register, no need to replicate per-port */ + u32 __iomem *port_pe_configuration_register; + struct scu_viit_entry __iomem *viit_registers; +}; + +enum sci_port_not_ready_reason_code { + SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS, + SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED, + SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION, + SCIC_PORT_NOT_READY_RECONFIGURING, + + SCIC_PORT_NOT_READY_REASON_CODE_MAX +}; + +struct sci_port_end_point_properties { + struct sci_sas_address sas_address; + struct sci_phy_proto protocols; +}; + +struct sci_port_properties { + u32 index; + struct sci_port_end_point_properties local; + struct sci_port_end_point_properties remote; + u32 phy_mask; +}; + +/** + * enum sci_port_states - This enumeration depicts all the states for the + * common port state machine. + * + * + */ +enum sci_port_states { + /** + * This state indicates that the port has successfully been stopped. + * In this state no new IO operations are permitted. + * This state is entered from the STOPPING state. + */ + SCI_PORT_STOPPED, + + /** + * This state indicates that the port is in the process of stopping. + * In this state no new IO operations are permitted, but existing IO + * operations are allowed to complete. + * This state is entered from the READY state. + */ + SCI_PORT_STOPPING, + + /** + * This state indicates the port is now ready. Thus, the user is + * able to perform IO operations on this port. + * This state is entered from the STARTING state. + */ + SCI_PORT_READY, + + /** + * The substate where the port is started and ready but has no + * active phys. + */ + SCI_PORT_SUB_WAITING, + + /** + * The substate where the port is started and ready and there is + * at least one phy operational. + */ + SCI_PORT_SUB_OPERATIONAL, + + /** + * The substate where the port is started and there was an + * add/remove phy event. This state is only used in Automatic + * Port Configuration Mode (APC) + */ + SCI_PORT_SUB_CONFIGURING, + + /** + * This state indicates the port is in the process of performing a hard + * reset. Thus, the user is unable to perform IO operations on this + * port. + * This state is entered from the READY state. + */ + SCI_PORT_RESETTING, + + /** + * This state indicates the port has failed a reset request. This state + * is entered when a port reset request times out. + * This state is entered from the RESETTING state. + */ + SCI_PORT_FAILED, + + +}; + +static inline void sci_port_decrement_request_count(struct isci_port *iport) +{ + if (WARN_ONCE(iport->started_request_count == 0, + "%s: tried to decrement started_request_count past 0!?", + __func__)) + /* pass */; + else + iport->started_request_count--; +} + +#define sci_port_active_phy(port, phy) \ + (((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0) + +void sci_port_construct( + struct isci_port *iport, + u8 port_index, + struct isci_host *ihost); + +enum sci_status sci_port_start(struct isci_port *iport); +enum sci_status sci_port_stop(struct isci_port *iport); + +enum sci_status sci_port_add_phy( + struct isci_port *iport, + struct isci_phy *iphy); + +enum sci_status sci_port_remove_phy( + struct isci_port *iport, + struct isci_phy *iphy); + +void sci_port_setup_transports( + struct isci_port *iport, + u32 device_id); + +void isci_port_bcn_enable(struct isci_host *, struct isci_port *); + +void sci_port_deactivate_phy( + struct isci_port *iport, + struct isci_phy *iphy, + bool do_notify_user); + +bool sci_port_link_detected( + struct isci_port *iport, + struct isci_phy *iphy); + +enum sci_status sci_port_link_up(struct isci_port *iport, + struct isci_phy *iphy); +enum sci_status sci_port_link_down(struct isci_port *iport, + struct isci_phy *iphy); + +struct isci_request; +struct isci_remote_device; +enum sci_status sci_port_start_io( + struct isci_port *iport, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sci_status sci_port_complete_io( + struct isci_port *iport, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sas_linkrate sci_port_get_max_allowed_speed( + struct isci_port *iport); + +void sci_port_broadcast_change_received( + struct isci_port *iport, + struct isci_phy *iphy); + +bool sci_port_is_valid_phy_assignment( + struct isci_port *iport, + u32 phy_index); + +void sci_port_get_sas_address( + struct isci_port *iport, + struct sci_sas_address *sas_address); + +void sci_port_get_attached_sas_address( + struct isci_port *iport, + struct sci_sas_address *sas_address); + +enum isci_status isci_port_get_state( + struct isci_port *isci_port); + +void isci_port_formed(struct asd_sas_phy *); +void isci_port_deformed(struct asd_sas_phy *); + +void isci_port_init( + struct isci_port *port, + struct isci_host *host, + int index); + +int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, + struct isci_phy *iphy); +#endif /* !defined(_ISCI_PORT_H_) */ diff --git a/drivers/scsi/isci/port_config.c b/drivers/scsi/isci/port_config.c new file mode 100644 index 000000000000..486b113c634a --- /dev/null +++ b/drivers/scsi/isci/port_config.c @@ -0,0 +1,754 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "host.h" + +#define SCIC_SDS_MPC_RECONFIGURATION_TIMEOUT (10) +#define SCIC_SDS_APC_RECONFIGURATION_TIMEOUT (10) +#define SCIC_SDS_APC_WAIT_LINK_UP_NOTIFICATION (100) + +enum SCIC_SDS_APC_ACTIVITY { + SCIC_SDS_APC_SKIP_PHY, + SCIC_SDS_APC_ADD_PHY, + SCIC_SDS_APC_START_TIMER, + + SCIC_SDS_APC_ACTIVITY_MAX +}; + +/* + * ****************************************************************************** + * General port configuration agent routines + * ****************************************************************************** */ + +/** + * + * @address_one: A SAS Address to be compared. + * @address_two: A SAS Address to be compared. + * + * Compare the two SAS Address and if SAS Address One is greater than SAS + * Address Two then return > 0 else if SAS Address One is less than SAS Address + * Two return < 0 Otherwise they are the same return 0 A signed value of x > 0 + * > y where x is returned for Address One > Address Two y is returned for + * Address One < Address Two 0 is returned ofr Address One = Address Two + */ +static s32 sci_sas_address_compare( + struct sci_sas_address address_one, + struct sci_sas_address address_two) +{ + if (address_one.high > address_two.high) { + return 1; + } else if (address_one.high < address_two.high) { + return -1; + } else if (address_one.low > address_two.low) { + return 1; + } else if (address_one.low < address_two.low) { + return -1; + } + + /* The two SAS Address must be identical */ + return 0; +} + +/** + * + * @controller: The controller object used for the port search. + * @phy: The phy object to match. + * + * This routine will find a matching port for the phy. This means that the + * port and phy both have the same broadcast sas address and same received sas + * address. The port address or the NULL if there is no matching + * port. port address if the port can be found to match the phy. + * NULL if there is no matching port for the phy. + */ +static struct isci_port *sci_port_configuration_agent_find_port( + struct isci_host *ihost, + struct isci_phy *iphy) +{ + u8 i; + struct sci_sas_address port_sas_address; + struct sci_sas_address port_attached_device_address; + struct sci_sas_address phy_sas_address; + struct sci_sas_address phy_attached_device_address; + + /* + * Since this phy can be a member of a wide port check to see if one or + * more phys match the sent and received SAS address as this phy in which + * case it should participate in the same port. + */ + sci_phy_get_sas_address(iphy, &phy_sas_address); + sci_phy_get_attached_sas_address(iphy, &phy_attached_device_address); + + for (i = 0; i < ihost->logical_port_entries; i++) { + struct isci_port *iport = &ihost->ports[i]; + + sci_port_get_sas_address(iport, &port_sas_address); + sci_port_get_attached_sas_address(iport, &port_attached_device_address); + + if (sci_sas_address_compare(port_sas_address, phy_sas_address) == 0 && + sci_sas_address_compare(port_attached_device_address, phy_attached_device_address) == 0) + return iport; + } + + return NULL; +} + +/** + * + * @controller: This is the controller object that contains the port agent + * @port_agent: This is the port configruation agent for the controller. + * + * This routine will validate the port configuration is correct for the SCU + * hardware. The SCU hardware allows for port configurations as follows. LP0 + * -> (PE0), (PE0, PE1), (PE0, PE1, PE2, PE3) LP1 -> (PE1) LP2 -> (PE2), (PE2, + * PE3) LP3 -> (PE3) enum sci_status SCI_SUCCESS the port configuration is valid for + * this port configuration agent. SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION + * the port configuration is not valid for this port configuration agent. + */ +static enum sci_status sci_port_configuration_agent_validate_ports( + struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent) +{ + struct sci_sas_address first_address; + struct sci_sas_address second_address; + + /* + * Sanity check the max ranges for all the phys the max index + * is always equal to the port range index */ + if (port_agent->phy_valid_port_range[0].max_index != 0 || + port_agent->phy_valid_port_range[1].max_index != 1 || + port_agent->phy_valid_port_range[2].max_index != 2 || + port_agent->phy_valid_port_range[3].max_index != 3) + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + + /* + * This is a request to configure a single x4 port or at least attempt + * to make all the phys into a single port */ + if (port_agent->phy_valid_port_range[0].min_index == 0 && + port_agent->phy_valid_port_range[1].min_index == 0 && + port_agent->phy_valid_port_range[2].min_index == 0 && + port_agent->phy_valid_port_range[3].min_index == 0) + return SCI_SUCCESS; + + /* + * This is a degenerate case where phy 1 and phy 2 are assigned + * to the same port this is explicitly disallowed by the hardware + * unless they are part of the same x4 port and this condition was + * already checked above. */ + if (port_agent->phy_valid_port_range[2].min_index == 1) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + /* + * PE0 and PE3 can never have the same SAS Address unless they + * are part of the same x4 wide port and we have already checked + * for this condition. */ + sci_phy_get_sas_address(&ihost->phys[0], &first_address); + sci_phy_get_sas_address(&ihost->phys[3], &second_address); + + if (sci_sas_address_compare(first_address, second_address) == 0) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + /* + * PE0 and PE1 are configured into a 2x1 ports make sure that the + * SAS Address for PE0 and PE2 are different since they can not be + * part of the same port. */ + if (port_agent->phy_valid_port_range[0].min_index == 0 && + port_agent->phy_valid_port_range[1].min_index == 1) { + sci_phy_get_sas_address(&ihost->phys[0], &first_address); + sci_phy_get_sas_address(&ihost->phys[2], &second_address); + + if (sci_sas_address_compare(first_address, second_address) == 0) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + } + + /* + * PE2 and PE3 are configured into a 2x1 ports make sure that the + * SAS Address for PE1 and PE3 are different since they can not be + * part of the same port. */ + if (port_agent->phy_valid_port_range[2].min_index == 2 && + port_agent->phy_valid_port_range[3].min_index == 3) { + sci_phy_get_sas_address(&ihost->phys[1], &first_address); + sci_phy_get_sas_address(&ihost->phys[3], &second_address); + + if (sci_sas_address_compare(first_address, second_address) == 0) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + } + + return SCI_SUCCESS; +} + +/* + * ****************************************************************************** + * Manual port configuration agent routines + * ****************************************************************************** */ + +/* verify all of the phys in the same port are using the same SAS address */ +static enum sci_status +sci_mpc_agent_validate_phy_configuration(struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent) +{ + u32 phy_mask; + u32 assigned_phy_mask; + struct sci_sas_address sas_address; + struct sci_sas_address phy_assigned_address; + u8 port_index; + u8 phy_index; + + assigned_phy_mask = 0; + sas_address.high = 0; + sas_address.low = 0; + + for (port_index = 0; port_index < SCI_MAX_PORTS; port_index++) { + phy_mask = ihost->oem_parameters.ports[port_index].phy_mask; + + if (!phy_mask) + continue; + /* + * Make sure that one or more of the phys were not already assinged to + * a different port. */ + if ((phy_mask & ~assigned_phy_mask) == 0) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + /* Find the starting phy index for this round through the loop */ + for (phy_index = 0; phy_index < SCI_MAX_PHYS; phy_index++) { + if ((phy_mask & (1 << phy_index)) == 0) + continue; + sci_phy_get_sas_address(&ihost->phys[phy_index], + &sas_address); + + /* + * The phy_index can be used as the starting point for the + * port range since the hardware starts all logical ports + * the same as the PE index. */ + port_agent->phy_valid_port_range[phy_index].min_index = port_index; + port_agent->phy_valid_port_range[phy_index].max_index = phy_index; + + if (phy_index != port_index) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + break; + } + + /* + * See how many additional phys are being added to this logical port. + * Note: We have not moved the current phy_index so we will actually + * compare the startting phy with itself. + * This is expected and required to add the phy to the port. */ + while (phy_index < SCI_MAX_PHYS) { + if ((phy_mask & (1 << phy_index)) == 0) + continue; + sci_phy_get_sas_address(&ihost->phys[phy_index], + &phy_assigned_address); + + if (sci_sas_address_compare(sas_address, phy_assigned_address) != 0) { + /* + * The phy mask specified that this phy is part of the same port + * as the starting phy and it is not so fail this configuration */ + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + port_agent->phy_valid_port_range[phy_index].min_index = port_index; + port_agent->phy_valid_port_range[phy_index].max_index = phy_index; + + sci_port_add_phy(&ihost->ports[port_index], + &ihost->phys[phy_index]); + + assigned_phy_mask |= (1 << phy_index); + } + + phy_index++; + } + + return sci_port_configuration_agent_validate_ports(ihost, port_agent); +} + +static void mpc_agent_timeout(unsigned long data) +{ + u8 index; + struct sci_timer *tmr = (struct sci_timer *)data; + struct sci_port_configuration_agent *port_agent; + struct isci_host *ihost; + unsigned long flags; + u16 configure_phy_mask; + + port_agent = container_of(tmr, typeof(*port_agent), timer); + ihost = container_of(port_agent, typeof(*ihost), port_agent); + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmr->cancel) + goto done; + + port_agent->timer_pending = false; + + /* Find the mask of phys that are reported read but as yet unconfigured into a port */ + configure_phy_mask = ~port_agent->phy_configured_mask & port_agent->phy_ready_mask; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + struct isci_phy *iphy = &ihost->phys[index]; + + if (configure_phy_mask & (1 << index)) { + port_agent->link_up_handler(ihost, port_agent, + phy_get_non_dummy_port(iphy), + iphy); + } + } + +done: + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +static void sci_mpc_agent_link_up(struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent, + struct isci_port *iport, + struct isci_phy *iphy) +{ + /* If the port is NULL then the phy was not assigned to a port. + * This is because the phy was not given the same SAS Address as + * the other PHYs in the port. + */ + if (!iport) + return; + + port_agent->phy_ready_mask |= (1 << iphy->phy_index); + sci_port_link_up(iport, iphy); + if ((iport->active_phy_mask & (1 << iphy->phy_index))) + port_agent->phy_configured_mask |= (1 << iphy->phy_index); +} + +/** + * + * @controller: This is the controller object that receives the link down + * notification. + * @port: This is the port object associated with the phy. If the is no + * associated port this is an NULL. The port is an invalid + * handle only if the phy was never port of this port. This happens when + * the phy is not broadcasting the same SAS address as the other phys in the + * assigned port. + * @phy: This is the phy object which has gone link down. + * + * This function handles the manual port configuration link down notifications. + * Since all ports and phys are associated at initialization time we just turn + * around and notifiy the port object of the link down event. If this PHY is + * not associated with a port there is no action taken. Is it possible to get a + * link down notification from a phy that has no assocoated port? + */ +static void sci_mpc_agent_link_down( + struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent, + struct isci_port *iport, + struct isci_phy *iphy) +{ + if (iport != NULL) { + /* + * If we can form a new port from the remainder of the phys + * then we want to start the timer to allow the SCI User to + * cleanup old devices and rediscover the port before + * rebuilding the port with the phys that remain in the ready + * state. + */ + port_agent->phy_ready_mask &= ~(1 << iphy->phy_index); + port_agent->phy_configured_mask &= ~(1 << iphy->phy_index); + + /* + * Check to see if there are more phys waiting to be + * configured into a port. If there are allow the SCI User + * to tear down this port, if necessary, and then reconstruct + * the port after the timeout. + */ + if ((port_agent->phy_configured_mask == 0x0000) && + (port_agent->phy_ready_mask != 0x0000) && + !port_agent->timer_pending) { + port_agent->timer_pending = true; + + sci_mod_timer(&port_agent->timer, + SCIC_SDS_MPC_RECONFIGURATION_TIMEOUT); + } + + sci_port_link_down(iport, iphy); + } +} + +/* verify phys are assigned a valid SAS address for automatic port + * configuration mode. + */ +static enum sci_status +sci_apc_agent_validate_phy_configuration(struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent) +{ + u8 phy_index; + u8 port_index; + struct sci_sas_address sas_address; + struct sci_sas_address phy_assigned_address; + + phy_index = 0; + + while (phy_index < SCI_MAX_PHYS) { + port_index = phy_index; + + /* Get the assigned SAS Address for the first PHY on the controller. */ + sci_phy_get_sas_address(&ihost->phys[phy_index], + &sas_address); + + while (++phy_index < SCI_MAX_PHYS) { + sci_phy_get_sas_address(&ihost->phys[phy_index], + &phy_assigned_address); + + /* Verify each of the SAS address are all the same for every PHY */ + if (sci_sas_address_compare(sas_address, phy_assigned_address) == 0) { + port_agent->phy_valid_port_range[phy_index].min_index = port_index; + port_agent->phy_valid_port_range[phy_index].max_index = phy_index; + } else { + port_agent->phy_valid_port_range[phy_index].min_index = phy_index; + port_agent->phy_valid_port_range[phy_index].max_index = phy_index; + break; + } + } + } + + return sci_port_configuration_agent_validate_ports(ihost, port_agent); +} + +static void sci_apc_agent_configure_ports(struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent, + struct isci_phy *iphy, + bool start_timer) +{ + u8 port_index; + enum sci_status status; + struct isci_port *iport; + enum SCIC_SDS_APC_ACTIVITY apc_activity = SCIC_SDS_APC_SKIP_PHY; + + iport = sci_port_configuration_agent_find_port(ihost, iphy); + + if (iport) { + if (sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) + apc_activity = SCIC_SDS_APC_ADD_PHY; + else + apc_activity = SCIC_SDS_APC_SKIP_PHY; + } else { + /* + * There is no matching Port for this PHY so lets search through the + * Ports and see if we can add the PHY to its own port or maybe start + * the timer and wait to see if a wider port can be made. + * + * Note the break when we reach the condition of the port id == phy id */ + for (port_index = port_agent->phy_valid_port_range[iphy->phy_index].min_index; + port_index <= port_agent->phy_valid_port_range[iphy->phy_index].max_index; + port_index++) { + + iport = &ihost->ports[port_index]; + + /* First we must make sure that this PHY can be added to this Port. */ + if (sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) { + /* + * Port contains a PHY with a greater PHY ID than the current + * PHY that has gone link up. This phy can not be part of any + * port so skip it and move on. */ + if (iport->active_phy_mask > (1 << iphy->phy_index)) { + apc_activity = SCIC_SDS_APC_SKIP_PHY; + break; + } + + /* + * We have reached the end of our Port list and have not found + * any reason why we should not either add the PHY to the port + * or wait for more phys to become active. */ + if (iport->physical_port_index == iphy->phy_index) { + /* + * The Port either has no active PHYs. + * Consider that if the port had any active PHYs we would have + * or active PHYs with + * a lower PHY Id than this PHY. */ + if (apc_activity != SCIC_SDS_APC_START_TIMER) { + apc_activity = SCIC_SDS_APC_ADD_PHY; + } + + break; + } + + /* + * The current Port has no active PHYs and this PHY could be part + * of this Port. Since we dont know as yet setup to start the + * timer and see if there is a better configuration. */ + if (iport->active_phy_mask == 0) { + apc_activity = SCIC_SDS_APC_START_TIMER; + } + } else if (iport->active_phy_mask != 0) { + /* + * The Port has an active phy and the current Phy can not + * participate in this port so skip the PHY and see if + * there is a better configuration. */ + apc_activity = SCIC_SDS_APC_SKIP_PHY; + } + } + } + + /* + * Check to see if the start timer operations should instead map to an + * add phy operation. This is caused because we have been waiting to + * add a phy to a port but could not becuase the automatic port + * configuration engine had a choice of possible ports for the phy. + * Since we have gone through a timeout we are going to restrict the + * choice to the smallest possible port. */ + if ( + (start_timer == false) + && (apc_activity == SCIC_SDS_APC_START_TIMER) + ) { + apc_activity = SCIC_SDS_APC_ADD_PHY; + } + + switch (apc_activity) { + case SCIC_SDS_APC_ADD_PHY: + status = sci_port_add_phy(iport, iphy); + + if (status == SCI_SUCCESS) { + port_agent->phy_configured_mask |= (1 << iphy->phy_index); + } + break; + + case SCIC_SDS_APC_START_TIMER: + /* + * This can occur for either a link down event, or a link + * up event where we cannot yet tell the port to which a + * phy belongs. + */ + if (port_agent->timer_pending) + sci_del_timer(&port_agent->timer); + + port_agent->timer_pending = true; + sci_mod_timer(&port_agent->timer, + SCIC_SDS_APC_WAIT_LINK_UP_NOTIFICATION); + break; + + case SCIC_SDS_APC_SKIP_PHY: + default: + /* do nothing the PHY can not be made part of a port at this time. */ + break; + } +} + +/** + * sci_apc_agent_link_up - handle apc link up events + * @scic: This is the controller object that receives the link up + * notification. + * @sci_port: This is the port object associated with the phy. If the is no + * associated port this is an NULL. + * @sci_phy: This is the phy object which has gone link up. + * + * This method handles the automatic port configuration for link up + * notifications. Is it possible to get a link down notification from a phy + * that has no assocoated port? + */ +static void sci_apc_agent_link_up(struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent, + struct isci_port *iport, + struct isci_phy *iphy) +{ + u8 phy_index = iphy->phy_index; + + if (!iport) { + /* the phy is not the part of this port */ + port_agent->phy_ready_mask |= 1 << phy_index; + sci_apc_agent_configure_ports(ihost, port_agent, iphy, true); + } else { + /* the phy is already the part of the port */ + u32 port_state = iport->sm.current_state_id; + + /* if the PORT'S state is resetting then the link up is from + * port hard reset in this case, we need to tell the port + * that link up is recieved + */ + BUG_ON(port_state != SCI_PORT_RESETTING); + port_agent->phy_ready_mask |= 1 << phy_index; + sci_port_link_up(iport, iphy); + } +} + +/** + * + * @controller: This is the controller object that receives the link down + * notification. + * @iport: This is the port object associated with the phy. If the is no + * associated port this is an NULL. + * @iphy: This is the phy object which has gone link down. + * + * This method handles the automatic port configuration link down + * notifications. not associated with a port there is no action taken. Is it + * possible to get a link down notification from a phy that has no assocoated + * port? + */ +static void sci_apc_agent_link_down( + struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent, + struct isci_port *iport, + struct isci_phy *iphy) +{ + port_agent->phy_ready_mask &= ~(1 << iphy->phy_index); + + if (!iport) + return; + if (port_agent->phy_configured_mask & (1 << iphy->phy_index)) { + enum sci_status status; + + status = sci_port_remove_phy(iport, iphy); + + if (status == SCI_SUCCESS) + port_agent->phy_configured_mask &= ~(1 << iphy->phy_index); + } +} + +/* configure the phys into ports when the timer fires */ +static void apc_agent_timeout(unsigned long data) +{ + u32 index; + struct sci_timer *tmr = (struct sci_timer *)data; + struct sci_port_configuration_agent *port_agent; + struct isci_host *ihost; + unsigned long flags; + u16 configure_phy_mask; + + port_agent = container_of(tmr, typeof(*port_agent), timer); + ihost = container_of(port_agent, typeof(*ihost), port_agent); + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmr->cancel) + goto done; + + port_agent->timer_pending = false; + + configure_phy_mask = ~port_agent->phy_configured_mask & port_agent->phy_ready_mask; + + if (!configure_phy_mask) + return; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if ((configure_phy_mask & (1 << index)) == 0) + continue; + + sci_apc_agent_configure_ports(ihost, port_agent, + &ihost->phys[index], false); + } + +done: + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +/* + * ****************************************************************************** + * Public port configuration agent routines + * ****************************************************************************** */ + +/** + * + * + * This method will construct the port configuration agent for operation. This + * call is universal for both manual port configuration and automatic port + * configuration modes. + */ +void sci_port_configuration_agent_construct( + struct sci_port_configuration_agent *port_agent) +{ + u32 index; + + port_agent->phy_configured_mask = 0x00; + port_agent->phy_ready_mask = 0x00; + + port_agent->link_up_handler = NULL; + port_agent->link_down_handler = NULL; + + port_agent->timer_pending = false; + + for (index = 0; index < SCI_MAX_PORTS; index++) { + port_agent->phy_valid_port_range[index].min_index = 0; + port_agent->phy_valid_port_range[index].max_index = 0; + } +} + +enum sci_status sci_port_configuration_agent_initialize( + struct isci_host *ihost, + struct sci_port_configuration_agent *port_agent) +{ + enum sci_status status; + enum sci_port_configuration_mode mode; + + mode = ihost->oem_parameters.controller.mode_type; + + if (mode == SCIC_PORT_MANUAL_CONFIGURATION_MODE) { + status = sci_mpc_agent_validate_phy_configuration( + ihost, port_agent); + + port_agent->link_up_handler = sci_mpc_agent_link_up; + port_agent->link_down_handler = sci_mpc_agent_link_down; + + sci_init_timer(&port_agent->timer, mpc_agent_timeout); + } else { + status = sci_apc_agent_validate_phy_configuration( + ihost, port_agent); + + port_agent->link_up_handler = sci_apc_agent_link_up; + port_agent->link_down_handler = sci_apc_agent_link_down; + + sci_init_timer(&port_agent->timer, apc_agent_timeout); + } + + return status; +} diff --git a/drivers/scsi/isci/probe_roms.c b/drivers/scsi/isci/probe_roms.c new file mode 100644 index 000000000000..b5f4341de243 --- /dev/null +++ b/drivers/scsi/isci/probe_roms.c @@ -0,0 +1,243 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + */ + +/* probe_roms - scan for oem parameters */ + +#include <linux/kernel.h> +#include <linux/firmware.h> +#include <linux/uaccess.h> +#include <linux/efi.h> +#include <asm/probe_roms.h> + +#include "isci.h" +#include "task.h" +#include "probe_roms.h" + +static efi_char16_t isci_efivar_name[] = { + 'R', 's', 't', 'S', 'c', 'u', 'O' +}; + +struct isci_orom *isci_request_oprom(struct pci_dev *pdev) +{ + void __iomem *oprom = pci_map_biosrom(pdev); + struct isci_orom *rom = NULL; + size_t len, i; + int j; + char oem_sig[4]; + struct isci_oem_hdr oem_hdr; + u8 *tmp, sum; + + if (!oprom) + return NULL; + + len = pci_biosrom_size(pdev); + rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL); + if (!rom) { + dev_warn(&pdev->dev, + "Unable to allocate memory for orom\n"); + return NULL; + } + + for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) { + memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE); + + /* we think we found the OEM table */ + if (memcmp(oem_sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) == 0) { + size_t copy_len; + + memcpy_fromio(&oem_hdr, oprom + i, sizeof(oem_hdr)); + + copy_len = min(oem_hdr.len - sizeof(oem_hdr), + sizeof(*rom)); + + memcpy_fromio(rom, + oprom + i + sizeof(oem_hdr), + copy_len); + + /* calculate checksum */ + tmp = (u8 *)&oem_hdr; + for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++) + sum += *tmp; + + tmp = (u8 *)rom; + for (j = 0; j < sizeof(*rom); j++, tmp++) + sum += *tmp; + + if (sum != 0) { + dev_warn(&pdev->dev, + "OEM table checksum failed\n"); + continue; + } + + /* keep going if that's not the oem param table */ + if (memcmp(rom->hdr.signature, + ISCI_ROM_SIG, + ISCI_ROM_SIG_SIZE) != 0) + continue; + + dev_info(&pdev->dev, + "OEM parameter table found in OROM\n"); + break; + } + } + + if (i >= len) { + dev_err(&pdev->dev, "oprom parse error\n"); + devm_kfree(&pdev->dev, rom); + rom = NULL; + } + pci_unmap_biosrom(oprom); + + return rom; +} + +enum sci_status isci_parse_oem_parameters(struct sci_oem_params *oem, + struct isci_orom *orom, int scu_index) +{ + /* check for valid inputs */ + if (scu_index < 0 || scu_index >= SCI_MAX_CONTROLLERS || + scu_index > orom->hdr.num_elements || !oem) + return -EINVAL; + + *oem = orom->ctrl[scu_index]; + return 0; +} + +struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw) +{ + struct isci_orom *orom = NULL, *data; + int i, j; + + if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0) + return NULL; + + if (fw->size < sizeof(*orom)) + goto out; + + data = (struct isci_orom *)fw->data; + + if (strncmp(ISCI_ROM_SIG, data->hdr.signature, + strlen(ISCI_ROM_SIG)) != 0) + goto out; + + orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL); + if (!orom) + goto out; + + memcpy(orom, fw->data, fw->size); + + if (is_c0(pdev)) + goto out; + + /* + * deprecated: override default amp_control for pre-preproduction + * silicon revisions + */ + for (i = 0; i < ARRAY_SIZE(orom->ctrl); i++) + for (j = 0; j < ARRAY_SIZE(orom->ctrl[i].phys); j++) { + orom->ctrl[i].phys[j].afe_tx_amp_control0 = 0xe7c03; + orom->ctrl[i].phys[j].afe_tx_amp_control1 = 0xe7c03; + orom->ctrl[i].phys[j].afe_tx_amp_control2 = 0xe7c03; + orom->ctrl[i].phys[j].afe_tx_amp_control3 = 0xe7c03; + } + out: + release_firmware(fw); + + return orom; +} + +static struct efi *get_efi(void) +{ +#ifdef CONFIG_EFI + return &efi; +#else + return NULL; +#endif +} + +struct isci_orom *isci_get_efi_var(struct pci_dev *pdev) +{ + efi_status_t status; + struct isci_orom *rom; + struct isci_oem_hdr *oem_hdr; + u8 *tmp, sum; + int j; + unsigned long data_len; + u8 *efi_data; + u32 efi_attrib = 0; + + data_len = 1024; + efi_data = devm_kzalloc(&pdev->dev, data_len, GFP_KERNEL); + if (!efi_data) { + dev_warn(&pdev->dev, + "Unable to allocate memory for EFI data\n"); + return NULL; + } + + rom = (struct isci_orom *)(efi_data + sizeof(struct isci_oem_hdr)); + + if (get_efi()) + status = get_efi()->get_variable(isci_efivar_name, + &ISCI_EFI_VENDOR_GUID, + &efi_attrib, + &data_len, + efi_data); + else + status = EFI_NOT_FOUND; + + if (status != EFI_SUCCESS) { + dev_warn(&pdev->dev, + "Unable to obtain EFI var data for OEM parms\n"); + return NULL; + } + + oem_hdr = (struct isci_oem_hdr *)efi_data; + + if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) { + dev_warn(&pdev->dev, + "Invalid OEM header signature\n"); + return NULL; + } + + /* calculate checksum */ + tmp = (u8 *)efi_data; + for (j = 0, sum = 0; j < (sizeof(*oem_hdr) + sizeof(*rom)); j++, tmp++) + sum += *tmp; + + if (sum != 0) { + dev_warn(&pdev->dev, + "OEM table checksum failed\n"); + return NULL; + } + + if (memcmp(rom->hdr.signature, + ISCI_ROM_SIG, + ISCI_ROM_SIG_SIZE) != 0) { + dev_warn(&pdev->dev, + "Invalid OEM table signature\n"); + return NULL; + } + + return rom; +} diff --git a/drivers/scsi/isci/probe_roms.h b/drivers/scsi/isci/probe_roms.h new file mode 100644 index 000000000000..dc007e692f4e --- /dev/null +++ b/drivers/scsi/isci/probe_roms.h @@ -0,0 +1,249 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _ISCI_PROBE_ROMS_H_ +#define _ISCI_PROBE_ROMS_H_ + +#ifdef __KERNEL__ +#include <linux/firmware.h> +#include <linux/pci.h> +#include <linux/efi.h> +#include "isci.h" + +#define SCIC_SDS_PARM_NO_SPEED 0 + +/* generation 1 (i.e. 1.5 Gb/s) */ +#define SCIC_SDS_PARM_GEN1_SPEED 1 + +/* generation 2 (i.e. 3.0 Gb/s) */ +#define SCIC_SDS_PARM_GEN2_SPEED 2 + +/* generation 3 (i.e. 6.0 Gb/s) */ +#define SCIC_SDS_PARM_GEN3_SPEED 3 +#define SCIC_SDS_PARM_MAX_SPEED SCIC_SDS_PARM_GEN3_SPEED + +/* parameters that can be set by module parameters */ +struct sci_user_parameters { + struct sci_phy_user_params { + /** + * This field specifies the NOTIFY (ENABLE SPIN UP) primitive + * insertion frequency for this phy index. + */ + u32 notify_enable_spin_up_insertion_frequency; + + /** + * This method specifies the number of transmitted DWORDs within which + * to transmit a single ALIGN primitive. This value applies regardless + * of what type of device is attached or connection state. A value of + * 0 indicates that no ALIGN primitives will be inserted. + */ + u16 align_insertion_frequency; + + /** + * This method specifies the number of transmitted DWORDs within which + * to transmit 2 ALIGN primitives. This applies for SAS connections + * only. A minimum value of 3 is required for this field. + */ + u16 in_connection_align_insertion_frequency; + + /** + * This field indicates the maximum speed generation to be utilized + * by phys in the supplied port. + * - A value of 1 indicates generation 1 (i.e. 1.5 Gb/s). + * - A value of 2 indicates generation 2 (i.e. 3.0 Gb/s). + * - A value of 3 indicates generation 3 (i.e. 6.0 Gb/s). + */ + u8 max_speed_generation; + + } phys[SCI_MAX_PHYS]; + + /** + * This field specifies the maximum number of direct attached devices + * that can have power supplied to them simultaneously. + */ + u8 max_number_concurrent_device_spin_up; + + /** + * This field specifies the number of seconds to allow a phy to consume + * power before yielding to another phy. + * + */ + u8 phy_spin_up_delay_interval; + + /** + * These timer values specifies how long a link will remain open with no + * activity in increments of a microsecond, it can be in increments of + * 100 microseconds if the upper most bit is set. + * + */ + u16 stp_inactivity_timeout; + u16 ssp_inactivity_timeout; + + /** + * These timer values specifies how long a link will remain open in increments + * of 100 microseconds. + * + */ + u16 stp_max_occupancy_timeout; + u16 ssp_max_occupancy_timeout; + + /** + * This timer value specifies how long a link will remain open with no + * outbound traffic in increments of a microsecond. + * + */ + u8 no_outbound_task_timeout; + +}; + +#define SCIC_SDS_PARM_PHY_MASK_MIN 0x0 +#define SCIC_SDS_PARM_PHY_MASK_MAX 0xF +#define MAX_CONCURRENT_DEVICE_SPIN_UP_COUNT 4 + +struct sci_oem_params; +int sci_oem_parameters_validate(struct sci_oem_params *oem); + +struct isci_orom; +struct isci_orom *isci_request_oprom(struct pci_dev *pdev); +enum sci_status isci_parse_oem_parameters(struct sci_oem_params *oem, + struct isci_orom *orom, int scu_index); +struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw); +struct isci_orom *isci_get_efi_var(struct pci_dev *pdev); + +struct isci_oem_hdr { + u8 sig[4]; + u8 rev_major; + u8 rev_minor; + u16 len; + u8 checksum; + u8 reserved1; + u16 reserved2; +} __attribute__ ((packed)); + +#else +#define SCI_MAX_PORTS 4 +#define SCI_MAX_PHYS 4 +#define SCI_MAX_CONTROLLERS 2 +#endif + +#define ISCI_FW_NAME "isci/isci_firmware.bin" + +#define ROMSIGNATURE 0xaa55 + +#define ISCI_OEM_SIG "$OEM" +#define ISCI_OEM_SIG_SIZE 4 +#define ISCI_ROM_SIG "ISCUOEMB" +#define ISCI_ROM_SIG_SIZE 8 + +#define ISCI_EFI_VENDOR_GUID \ + EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, \ + 0x1a, 0x04, 0xc6) +#define ISCI_EFI_VAR_NAME "RstScuO" + +/* Allowed PORT configuration modes APC Automatic PORT configuration mode is + * defined by the OEM configuration parameters providing no PHY_MASK parameters + * for any PORT. i.e. There are no phys assigned to any of the ports at start. + * MPC Manual PORT configuration mode is defined by the OEM configuration + * parameters providing a PHY_MASK value for any PORT. It is assumed that any + * PORT with no PHY_MASK is an invalid port and not all PHYs must be assigned. + * A PORT_PHY mask that assigns just a single PHY to a port and no other PHYs + * being assigned is sufficient to declare manual PORT configuration. + */ +enum sci_port_configuration_mode { + SCIC_PORT_MANUAL_CONFIGURATION_MODE = 0, + SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE = 1 +}; + +struct sci_bios_oem_param_block_hdr { + uint8_t signature[ISCI_ROM_SIG_SIZE]; + uint16_t total_block_length; + uint8_t hdr_length; + uint8_t version; + uint8_t preboot_source; + uint8_t num_elements; + uint16_t element_length; + uint8_t reserved[8]; +} __attribute__ ((packed)); + +struct sci_oem_params { + struct { + uint8_t mode_type; + uint8_t max_concurrent_dev_spin_up; + uint8_t do_enable_ssc; + uint8_t reserved; + } controller; + + struct { + uint8_t phy_mask; + } ports[SCI_MAX_PORTS]; + + struct sci_phy_oem_params { + struct { + uint32_t high; + uint32_t low; + } sas_address; + + uint32_t afe_tx_amp_control0; + uint32_t afe_tx_amp_control1; + uint32_t afe_tx_amp_control2; + uint32_t afe_tx_amp_control3; + } phys[SCI_MAX_PHYS]; +} __attribute__ ((packed)); + +struct isci_orom { + struct sci_bios_oem_param_block_hdr hdr; + struct sci_oem_params ctrl[SCI_MAX_CONTROLLERS]; +} __attribute__ ((packed)); + +#endif diff --git a/drivers/scsi/isci/registers.h b/drivers/scsi/isci/registers.h new file mode 100644 index 000000000000..9b266c7428e8 --- /dev/null +++ b/drivers/scsi/isci/registers.h @@ -0,0 +1,1934 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCU_REGISTERS_H_ +#define _SCU_REGISTERS_H_ + +/** + * This file contains the constants and structures for the SCU memory mapped + * registers. + * + * + */ + +#define SCU_VIIT_ENTRY_ID_MASK (0xC0000000) +#define SCU_VIIT_ENTRY_ID_SHIFT (30) + +#define SCU_VIIT_ENTRY_FUNCTION_MASK (0x0FF00000) +#define SCU_VIIT_ENTRY_FUNCTION_SHIFT (20) + +#define SCU_VIIT_ENTRY_IPPTMODE_MASK (0x0001F800) +#define SCU_VIIT_ENTRY_IPPTMODE_SHIFT (12) + +#define SCU_VIIT_ENTRY_LPVIE_MASK (0x00000F00) +#define SCU_VIIT_ENTRY_LPVIE_SHIFT (8) + +#define SCU_VIIT_ENTRY_STATUS_MASK (0x000000FF) +#define SCU_VIIT_ENTRY_STATUS_SHIFT (0) + +#define SCU_VIIT_ENTRY_ID_INVALID (0 << SCU_VIIT_ENTRY_ID_SHIFT) +#define SCU_VIIT_ENTRY_ID_VIIT (1 << SCU_VIIT_ENTRY_ID_SHIFT) +#define SCU_VIIT_ENTRY_ID_IIT (2 << SCU_VIIT_ENTRY_ID_SHIFT) +#define SCU_VIIT_ENTRY_ID_VIRT_EXP (3 << SCU_VIIT_ENTRY_ID_SHIFT) + +#define SCU_VIIT_IPPT_SSP_INITIATOR (0x01 << SCU_VIIT_ENTRY_IPPTMODE_SHIFT) +#define SCU_VIIT_IPPT_SMP_INITIATOR (0x02 << SCU_VIIT_ENTRY_IPPTMODE_SHIFT) +#define SCU_VIIT_IPPT_STP_INITIATOR (0x04 << SCU_VIIT_ENTRY_IPPTMODE_SHIFT) +#define SCU_VIIT_IPPT_INITIATOR \ + (\ + SCU_VIIT_IPPT_SSP_INITIATOR \ + | SCU_VIIT_IPPT_SMP_INITIATOR \ + | SCU_VIIT_IPPT_STP_INITIATOR \ + ) + +#define SCU_VIIT_STATUS_RNC_VALID (0x01 << SCU_VIIT_ENTRY_STATUS_SHIFT) +#define SCU_VIIT_STATUS_ADDRESS_VALID (0x02 << SCU_VIIT_ENTRY_STATUS_SHIFT) +#define SCU_VIIT_STATUS_RNI_VALID (0x04 << SCU_VIIT_ENTRY_STATUS_SHIFT) +#define SCU_VIIT_STATUS_ALL_VALID \ + (\ + SCU_VIIT_STATUS_RNC_VALID \ + | SCU_VIIT_STATUS_ADDRESS_VALID \ + | SCU_VIIT_STATUS_RNI_VALID \ + ) + +#define SCU_VIIT_IPPT_SMP_TARGET (0x10 << SCU_VIIT_ENTRY_IPPTMODE_SHIFT) + +/** + * struct scu_viit_entry - This is the SCU Virtual Initiator Table Entry + * + * + */ +struct scu_viit_entry { + /** + * This must be encoded as to the type of initiator that is being constructed + * for this port. + */ + u32 status; + + /** + * Virtual initiator high SAS Address + */ + u32 initiator_sas_address_hi; + + /** + * Virtual initiator low SAS Address + */ + u32 initiator_sas_address_lo; + + /** + * This must be 0 + */ + u32 reserved; + +}; + + +/* IIT Status Defines */ +#define SCU_IIT_ENTRY_ID_MASK (0xC0000000) +#define SCU_IIT_ENTRY_ID_SHIFT (30) + +#define SCU_IIT_ENTRY_STATUS_UPDATE_MASK (0x20000000) +#define SCU_IIT_ENTRY_STATUS_UPDATE_SHIFT (29) + +#define SCU_IIT_ENTRY_LPI_MASK (0x00000F00) +#define SCU_IIT_ENTRY_LPI_SHIFT (8) + +#define SCU_IIT_ENTRY_STATUS_MASK (0x000000FF) +#define SCU_IIT_ENTRY_STATUS_SHIFT (0) + +/* IIT Remote Initiator Defines */ +#define SCU_IIT_ENTRY_REMOTE_TAG_MASK (0x0000FFFF) +#define SCU_IIT_ENTRY_REMOTE_TAG_SHIFT (0) + +#define SCU_IIT_ENTRY_REMOTE_RNC_MASK (0x0FFF0000) +#define SCU_IIT_ENTRY_REMOTE_RNC_SHIFT (16) + +#define SCU_IIT_ENTRY_ID_INVALID (0 << SCU_IIT_ENTRY_ID_SHIFT) +#define SCU_IIT_ENTRY_ID_VIIT (1 << SCU_IIT_ENTRY_ID_SHIFT) +#define SCU_IIT_ENTRY_ID_IIT (2 << SCU_IIT_ENTRY_ID_SHIFT) +#define SCU_IIT_ENTRY_ID_VIRT_EXP (3 << SCU_IIT_ENTRY_ID_SHIFT) + +/** + * struct scu_iit_entry - This will be implemented later when we support + * virtual functions + * + * + */ +struct scu_iit_entry { + u32 status; + u32 remote_initiator_sas_address_hi; + u32 remote_initiator_sas_address_lo; + u32 remote_initiator; + +}; + +/* Generate a value for an SCU register */ +#define SCU_GEN_VALUE(name, value) \ + (((value) << name ## _SHIFT) & (name ## _MASK)) + +/* + * Generate a bit value for an SCU register + * Make sure that the register MASK is just a single bit */ +#define SCU_GEN_BIT(name) \ + SCU_GEN_VALUE(name, ((u32)1)) + +#define SCU_SET_BIT(name, reg_value) \ + ((reg_value) | SCU_GEN_BIT(name)) + +#define SCU_CLEAR_BIT(name, reg_value) \ + ((reg_value)$ ~(SCU_GEN_BIT(name))) + +/* + * ***************************************************************************** + * Unions for bitfield definitions of SCU Registers + * SMU Post Context Port + * ***************************************************************************** */ +#define SMU_POST_CONTEXT_PORT_CONTEXT_INDEX_SHIFT (0) +#define SMU_POST_CONTEXT_PORT_CONTEXT_INDEX_MASK (0x00000FFF) +#define SMU_POST_CONTEXT_PORT_LOGICAL_PORT_INDEX_SHIFT (12) +#define SMU_POST_CONTEXT_PORT_LOGICAL_PORT_INDEX_MASK (0x0000F000) +#define SMU_POST_CONTEXT_PORT_PROTOCOL_ENGINE_SHIFT (16) +#define SMU_POST_CONTEXT_PORT_PROTOCOL_ENGINE_MASK (0x00030000) +#define SMU_POST_CONTEXT_PORT_COMMAND_CONTEXT_SHIFT (18) +#define SMU_POST_CONTEXT_PORT_COMMAND_CONTEXT_MASK (0x00FC0000) +#define SMU_POST_CONTEXT_PORT_RESERVED_MASK (0xFF000000) + +#define SMU_PCP_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_POST_CONTEXT_PORT_ ## name, value) + +/* ***************************************************************************** */ +#define SMU_INTERRUPT_STATUS_COMPLETION_SHIFT (31) +#define SMU_INTERRUPT_STATUS_COMPLETION_MASK (0x80000000) +#define SMU_INTERRUPT_STATUS_QUEUE_SUSPEND_SHIFT (1) +#define SMU_INTERRUPT_STATUS_QUEUE_SUSPEND_MASK (0x00000002) +#define SMU_INTERRUPT_STATUS_QUEUE_ERROR_SHIFT (0) +#define SMU_INTERRUPT_STATUS_QUEUE_ERROR_MASK (0x00000001) +#define SMU_INTERRUPT_STATUS_RESERVED_MASK (0x7FFFFFFC) + +#define SMU_ISR_GEN_BIT(name) \ + SCU_GEN_BIT(SMU_INTERRUPT_STATUS_ ## name) + +#define SMU_ISR_QUEUE_ERROR SMU_ISR_GEN_BIT(QUEUE_ERROR) +#define SMU_ISR_QUEUE_SUSPEND SMU_ISR_GEN_BIT(QUEUE_SUSPEND) +#define SMU_ISR_COMPLETION SMU_ISR_GEN_BIT(COMPLETION) + +/* ***************************************************************************** */ +#define SMU_INTERRUPT_MASK_COMPLETION_SHIFT (31) +#define SMU_INTERRUPT_MASK_COMPLETION_MASK (0x80000000) +#define SMU_INTERRUPT_MASK_QUEUE_SUSPEND_SHIFT (1) +#define SMU_INTERRUPT_MASK_QUEUE_SUSPEND_MASK (0x00000002) +#define SMU_INTERRUPT_MASK_QUEUE_ERROR_SHIFT (0) +#define SMU_INTERRUPT_MASK_QUEUE_ERROR_MASK (0x00000001) +#define SMU_INTERRUPT_MASK_RESERVED_MASK (0x7FFFFFFC) + +#define SMU_IMR_GEN_BIT(name) \ + SCU_GEN_BIT(SMU_INTERRUPT_MASK_ ## name) + +#define SMU_IMR_QUEUE_ERROR SMU_IMR_GEN_BIT(QUEUE_ERROR) +#define SMU_IMR_QUEUE_SUSPEND SMU_IMR_GEN_BIT(QUEUE_SUSPEND) +#define SMU_IMR_COMPLETION SMU_IMR_GEN_BIT(COMPLETION) + +/* ***************************************************************************** */ +#define SMU_INTERRUPT_COALESCING_CONTROL_TIMER_SHIFT (0) +#define SMU_INTERRUPT_COALESCING_CONTROL_TIMER_MASK (0x0000001F) +#define SMU_INTERRUPT_COALESCING_CONTROL_NUMBER_SHIFT (8) +#define SMU_INTERRUPT_COALESCING_CONTROL_NUMBER_MASK (0x0000FF00) +#define SMU_INTERRUPT_COALESCING_CONTROL_RESERVED_MASK (0xFFFF00E0) + +#define SMU_ICC_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_INTERRUPT_COALESCING_CONTROL_ ## name, value) + +/* ***************************************************************************** */ +#define SMU_TASK_CONTEXT_RANGE_START_SHIFT (0) +#define SMU_TASK_CONTEXT_RANGE_START_MASK (0x00000FFF) +#define SMU_TASK_CONTEXT_RANGE_ENDING_SHIFT (16) +#define SMU_TASK_CONTEXT_RANGE_ENDING_MASK (0x0FFF0000) +#define SMU_TASK_CONTEXT_RANGE_ENABLE_SHIFT (31) +#define SMU_TASK_CONTEXT_RANGE_ENABLE_MASK (0x80000000) +#define SMU_TASK_CONTEXT_RANGE_RESERVED_MASK (0x7000F000) + +#define SMU_TCR_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_TASK_CONTEXT_RANGE_ ## name, value) + +#define SMU_TCR_GEN_BIT(name, value) \ + SCU_GEN_BIT(SMU_TASK_CONTEXT_RANGE_ ## name) + +/* ***************************************************************************** */ + +#define SMU_COMPLETION_QUEUE_PUT_POINTER_SHIFT (0) +#define SMU_COMPLETION_QUEUE_PUT_POINTER_MASK (0x00003FFF) +#define SMU_COMPLETION_QUEUE_PUT_CYCLE_BIT_SHIFT (15) +#define SMU_COMPLETION_QUEUE_PUT_CYCLE_BIT_MASK (0x00008000) +#define SMU_COMPLETION_QUEUE_PUT_EVENT_POINTER_SHIFT (16) +#define SMU_COMPLETION_QUEUE_PUT_EVENT_POINTER_MASK (0x03FF0000) +#define SMU_COMPLETION_QUEUE_PUT_EVENT_CYCLE_BIT_SHIFT (26) +#define SMU_COMPLETION_QUEUE_PUT_EVENT_CYCLE_BIT_MASK (0x04000000) +#define SMU_COMPLETION_QUEUE_PUT_RESERVED_MASK (0xF8004000) + +#define SMU_CQPR_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_COMPLETION_QUEUE_PUT_ ## name, value) + +#define SMU_CQPR_GEN_BIT(name) \ + SCU_GEN_BIT(SMU_COMPLETION_QUEUE_PUT_ ## name) + +/* ***************************************************************************** */ + +#define SMU_COMPLETION_QUEUE_GET_POINTER_SHIFT (0) +#define SMU_COMPLETION_QUEUE_GET_POINTER_MASK (0x00003FFF) +#define SMU_COMPLETION_QUEUE_GET_CYCLE_BIT_SHIFT (15) +#define SMU_COMPLETION_QUEUE_GET_CYCLE_BIT_MASK (0x00008000) +#define SMU_COMPLETION_QUEUE_GET_EVENT_POINTER_SHIFT (16) +#define SMU_COMPLETION_QUEUE_GET_EVENT_POINTER_MASK (0x03FF0000) +#define SMU_COMPLETION_QUEUE_GET_EVENT_CYCLE_BIT_SHIFT (26) +#define SMU_COMPLETION_QUEUE_GET_EVENT_CYCLE_BIT_MASK (0x04000000) +#define SMU_COMPLETION_QUEUE_GET_ENABLE_SHIFT (30) +#define SMU_COMPLETION_QUEUE_GET_ENABLE_MASK (0x40000000) +#define SMU_COMPLETION_QUEUE_GET_EVENT_ENABLE_SHIFT (31) +#define SMU_COMPLETION_QUEUE_GET_EVENT_ENABLE_MASK (0x80000000) +#define SMU_COMPLETION_QUEUE_GET_RESERVED_MASK (0x38004000) + +#define SMU_CQGR_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_COMPLETION_QUEUE_GET_ ## name, value) + +#define SMU_CQGR_GEN_BIT(name) \ + SCU_GEN_BIT(SMU_COMPLETION_QUEUE_GET_ ## name) + +#define SMU_CQGR_CYCLE_BIT \ + SMU_CQGR_GEN_BIT(CYCLE_BIT) + +#define SMU_CQGR_EVENT_CYCLE_BIT \ + SMU_CQGR_GEN_BIT(EVENT_CYCLE_BIT) + +#define SMU_CQGR_GET_POINTER_SET(value) \ + SMU_CQGR_GEN_VAL(POINTER, value) + + +/* ***************************************************************************** */ +#define SMU_COMPLETION_QUEUE_CONTROL_QUEUE_LIMIT_SHIFT (0) +#define SMU_COMPLETION_QUEUE_CONTROL_QUEUE_LIMIT_MASK (0x00003FFF) +#define SMU_COMPLETION_QUEUE_CONTROL_EVENT_LIMIT_SHIFT (16) +#define SMU_COMPLETION_QUEUE_CONTROL_EVENT_LIMIT_MASK (0x03FF0000) +#define SMU_COMPLETION_QUEUE_CONTROL_RESERVED_MASK (0xFC00C000) + +#define SMU_CQC_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_COMPLETION_QUEUE_CONTROL_ ## name, value) + +#define SMU_CQC_QUEUE_LIMIT_SET(value) \ + SMU_CQC_GEN_VAL(QUEUE_LIMIT, value) + +#define SMU_CQC_EVENT_LIMIT_SET(value) \ + SMU_CQC_GEN_VAL(EVENT_LIMIT, value) + + +/* ***************************************************************************** */ +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_SHIFT (0) +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_MASK (0x00000FFF) +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_SHIFT (12) +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_MASK (0x00007000) +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_SHIFT (15) +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_MASK (0x07FF8000) +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_PEG_SHIFT (27) +#define SMU_DEVICE_CONTEXT_CAPACITY_MAX_PEG_MASK (0x08000000) +#define SMU_DEVICE_CONTEXT_CAPACITY_RESERVED_MASK (0xF0000000) + +#define SMU_DCC_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_DEVICE_CONTEXT_CAPACITY_ ## name, value) + +#define SMU_DCC_GET_MAX_PEG(value) \ + (\ + ((value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_PEG_MASK) \ + >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_SHIFT \ + ) + +#define SMU_DCC_GET_MAX_LP(value) \ + (\ + ((value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_MASK) \ + >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_LP_SHIFT \ + ) + +#define SMU_DCC_GET_MAX_TC(value) \ + (\ + ((value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_MASK) \ + >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_TC_SHIFT \ + ) + +#define SMU_DCC_GET_MAX_RNC(value) \ + (\ + ((value) & SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_MASK) \ + >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_SHIFT \ + ) + +/* -------------------------------------------------------------------------- */ + +#define SMU_CONTROL_STATUS_TASK_CONTEXT_RANGE_ENABLE_SHIFT (0) +#define SMU_CONTROL_STATUS_TASK_CONTEXT_RANGE_ENABLE_MASK (0x00000001) +#define SMU_CONTROL_STATUS_COMPLETION_BYTE_SWAP_ENABLE_SHIFT (1) +#define SMU_CONTROL_STATUS_COMPLETION_BYTE_SWAP_ENABLE_MASK (0x00000002) +#define SMU_CONTROL_STATUS_CONTEXT_RAM_INIT_COMPLETED_SHIFT (16) +#define SMU_CONTROL_STATUS_CONTEXT_RAM_INIT_COMPLETED_MASK (0x00010000) +#define SMU_CONTROL_STATUS_SCHEDULER_RAM_INIT_COMPLETED_SHIFT (17) +#define SMU_CONTROL_STATUS_SCHEDULER_RAM_INIT_COMPLETED_MASK (0x00020000) +#define SMU_CONTROL_STATUS_RESERVED_MASK (0xFFFCFFFC) + +#define SMU_SMUCSR_GEN_BIT(name) \ + SCU_GEN_BIT(SMU_CONTROL_STATUS_ ## name) + +#define SMU_SMUCSR_SCHEDULER_RAM_INIT_COMPLETED \ + (SMU_SMUCSR_GEN_BIT(SCHEDULER_RAM_INIT_COMPLETED)) + +#define SMU_SMUCSR_CONTEXT_RAM_INIT_COMPLETED \ + (SMU_SMUCSR_GEN_BIT(CONTEXT_RAM_INIT_COMPLETED)) + +#define SCU_RAM_INIT_COMPLETED \ + (\ + SMU_SMUCSR_CONTEXT_RAM_INIT_COMPLETED \ + | SMU_SMUCSR_SCHEDULER_RAM_INIT_COMPLETED \ + ) + +/* -------------------------------------------------------------------------- */ + +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE0_SHIFT (0) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE0_MASK (0x00000001) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE1_SHIFT (1) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE1_MASK (0x00000002) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE2_SHIFT (2) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE2_MASK (0x00000004) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE3_SHIFT (3) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_PE3_MASK (0x00000008) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE0_SHIFT (8) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE0_MASK (0x00000100) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE1_SHIFT (9) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE1_MASK (0x00000200) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE2_SHIFT (10) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE2_MASK (0x00000400) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE3_SHIFT (11) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_PE3_MASK (0x00000800) + +#define SMU_RESET_PROTOCOL_ENGINE(peg, pe) \ + ((1 << (pe)) << ((peg) * 8)) + +#define SMU_RESET_PEG_PROTOCOL_ENGINES(peg) \ + (\ + SMU_RESET_PROTOCOL_ENGINE(peg, 0) \ + | SMU_RESET_PROTOCOL_ENGINE(peg, 1) \ + | SMU_RESET_PROTOCOL_ENGINE(peg, 2) \ + | SMU_RESET_PROTOCOL_ENGINE(peg, 3) \ + ) + +#define SMU_RESET_ALL_PROTOCOL_ENGINES() \ + (\ + SMU_RESET_PEG_PROTOCOL_ENGINES(0) \ + | SMU_RESET_PEG_PROTOCOL_ENGINES(1) \ + ) + +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG0_LP0_SHIFT (16) +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG0_LP0_MASK (0x00010000) +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG0_LP2_SHIFT (17) +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG0_LP2_MASK (0x00020000) +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG1_LP0_SHIFT (18) +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG1_LP0_MASK (0x00040000) +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG1_LP2_SHIFT (19) +#define SMU_SOFTRESET_CONTROL_RESET_WIDE_PORT_PEG1_LP2_MASK (0x00080000) + +#define SMU_RESET_WIDE_PORT_QUEUE(peg, wide_port) \ + ((1 << ((wide_port) / 2)) << ((peg) * 2) << 16) + +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_SHIFT (20) +#define SMU_SOFTRESET_CONTROL_RESET_PEG0_MASK (0x00100000) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_SHIFT (21) +#define SMU_SOFTRESET_CONTROL_RESET_PEG1_MASK (0x00200000) +#define SMU_SOFTRESET_CONTROL_RESET_SCU_SHIFT (22) +#define SMU_SOFTRESET_CONTROL_RESET_SCU_MASK (0x00400000) + +/* + * It seems to make sense that if you are going to reset the protocol + * engine group that you would also reset all of the protocol engines */ +#define SMU_RESET_PROTOCOL_ENGINE_GROUP(peg) \ + (\ + (1 << ((peg) + 20)) \ + | SMU_RESET_WIDE_PORT_QUEUE(peg, 0) \ + | SMU_RESET_WIDE_PORT_QUEUE(peg, 1) \ + | SMU_RESET_PEG_PROTOCOL_ENGINES(peg) \ + ) + +#define SMU_RESET_ALL_PROTOCOL_ENGINE_GROUPS() \ + (\ + SMU_RESET_PROTOCOL_ENGINE_GROUP(0) \ + | SMU_RESET_PROTOCOL_ENGINE_GROUP(1) \ + ) + +#define SMU_RESET_SCU() (0xFFFFFFFF) + + + +/* ***************************************************************************** */ +#define SMU_TASK_CONTEXT_ASSIGNMENT_STARTING_SHIFT (0) +#define SMU_TASK_CONTEXT_ASSIGNMENT_STARTING_MASK (0x00000FFF) +#define SMU_TASK_CONTEXT_ASSIGNMENT_ENDING_SHIFT (16) +#define SMU_TASK_CONTEXT_ASSIGNMENT_ENDING_MASK (0x0FFF0000) +#define SMU_TASK_CONTEXT_ASSIGNMENT_RANGE_CHECK_ENABLE_SHIFT (31) +#define SMU_TASK_CONTEXT_ASSIGNMENT_RANGE_CHECK_ENABLE_MASK (0x80000000) +#define SMU_TASK_CONTEXT_ASSIGNMENT_RESERVED_MASK (0x7000F000) + +#define SMU_TCA_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_TASK_CONTEXT_ASSIGNMENT_ ## name, value) + +#define SMU_TCA_GEN_BIT(name) \ + SCU_GEN_BIT(SMU_TASK_CONTEXT_ASSIGNMENT_ ## name) + +/* ***************************************************************************** */ +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_CONTROL_QUEUE_SIZE_SHIFT (0) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_CONTROL_QUEUE_SIZE_MASK (0x00000FFF) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_CONTROL_RESERVED_MASK (0xFFFFF000) + +#define SCU_UFQC_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SDMA_UNSOLICITED_FRAME_QUEUE_CONTROL_ ## name, value) + +#define SCU_UFQC_QUEUE_SIZE_SET(value) \ + SCU_UFQC_GEN_VAL(QUEUE_SIZE, value) + +/* ***************************************************************************** */ +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_PUT_POINTER_SHIFT (0) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_PUT_POINTER_MASK (0x00000FFF) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_PUT_CYCLE_BIT_SHIFT (12) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_PUT_CYCLE_BIT_MASK (0x00001000) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_PUT_RESERVED_MASK (0xFFFFE000) + +#define SCU_UFQPP_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SDMA_UNSOLICITED_FRAME_QUEUE_PUT_ ## name, value) + +#define SCU_UFQPP_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SDMA_UNSOLICITED_FRAME_QUEUE_PUT_ ## name) + +/* + * ***************************************************************************** + * * SDMA Registers + * ***************************************************************************** */ +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_POINTER_SHIFT (0) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_POINTER_MASK (0x00000FFF) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_CYCLE_BIT_SHIFT (12) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_CYCLE_BIT_MASK (12) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_ENABLE_BIT_SHIFT (31) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_ENABLE_BIT_MASK (0x80000000) +#define SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_RESERVED_MASK (0x7FFFE000) + +#define SCU_UFQGP_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_ ## name, value) + +#define SCU_UFQGP_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SDMA_UNSOLICITED_FRAME_QUEUE_GET_ ## name) + +#define SCU_UFQGP_CYCLE_BIT(value) \ + SCU_UFQGP_GEN_BIT(CYCLE_BIT, value) + +#define SCU_UFQGP_GET_POINTER(value) \ + SCU_UFQGP_GEN_VALUE(POINTER, value) + +#define SCU_UFQGP_ENABLE(value) \ + (SCU_UFQGP_GEN_BIT(ENABLE) | value) + +#define SCU_UFQGP_DISABLE(value) \ + (~SCU_UFQGP_GEN_BIT(ENABLE) & value) + +#define SCU_UFQGP_VALUE(bit, value) \ + (SCU_UFQGP_CYCLE_BIT(bit) | SCU_UFQGP_GET_POINTER(value)) + +/* ***************************************************************************** */ +#define SCU_PDMA_CONFIGURATION_ADDRESS_MODIFIER_SHIFT (0) +#define SCU_PDMA_CONFIGURATION_ADDRESS_MODIFIER_MASK (0x0000FFFF) +#define SCU_PDMA_CONFIGURATION_PCI_RELAXED_ORDERING_ENABLE_SHIFT (16) +#define SCU_PDMA_CONFIGURATION_PCI_RELAXED_ORDERING_ENABLE_MASK (0x00010000) +#define SCU_PDMA_CONFIGURATION_PCI_NO_SNOOP_ENABLE_SHIFT (17) +#define SCU_PDMA_CONFIGURATION_PCI_NO_SNOOP_ENABLE_MASK (0x00020000) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_BYTE_SWAP_SHIFT (18) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_BYTE_SWAP_MASK (0x00040000) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_XPI_SGL_FETCH_SHIFT (19) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_XPI_SGL_FETCH_MASK (0x00080000) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_XPI_RX_HEADER_RAM_WRITE_SHIFT (20) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_XPI_RX_HEADER_RAM_WRITE_MASK (0x00100000) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_XPI_UF_ADDRESS_FETCH_SHIFT (21) +#define SCU_PDMA_CONFIGURATION_BIG_ENDIAN_CONTROL_XPI_UF_ADDRESS_FETCH_MASK (0x00200000) +#define SCU_PDMA_CONFIGURATION_ADDRESS_MODIFIER_SELECT_SHIFT (22) +#define SCU_PDMA_CONFIGURATION_ADDRESS_MODIFIER_SELECT_MASK (0x00400000) +#define SCU_PDMA_CONFIGURATION_RESERVED_MASK (0xFF800000) + +#define SCU_PDMACR_GEN_VALUE(name, value) \ + SCU_GEN_VALUE(SCU_PDMA_CONFIGURATION_ ## name, value) + +#define SCU_PDMACR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_PDMA_CONFIGURATION_ ## name) + +#define SCU_PDMACR_BE_GEN_BIT(name) \ + SCU_PCMACR_GEN_BIT(BIG_ENDIAN_CONTROL_ ## name) + +/* ***************************************************************************** */ +#define SCU_CDMA_CONFIGURATION_PCI_RELAXED_ORDERING_ENABLE_SHIFT (8) +#define SCU_CDMA_CONFIGURATION_PCI_RELAXED_ORDERING_ENABLE_MASK (0x00000100) + +#define SCU_CDMACR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_CDMA_CONFIGURATION_ ## name) + +/* + * ***************************************************************************** + * * SCU Link Layer Registers + * ***************************************************************************** */ +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_TIMEOUT_SHIFT (0) +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_TIMEOUT_MASK (0x000000FF) +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_LOCK_TIME_SHIFT (8) +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_LOCK_TIME_MASK (0x0000FF00) +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_RATE_CHANGE_DELAY_SHIFT (16) +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_RATE_CHANGE_DELAY_MASK (0x00FF0000) +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_DWORD_SYNC_TIMEOUT_SHIFT (24) +#define SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_DWORD_SYNC_TIMEOUT_MASK (0xFF000000) +#define SCU_LINK_LAYER_SPEED_NECGOIATION_TIMER_VALUES_REQUIRED_MASK (0x00000000) +#define SCU_LINK_LAYER_SPEED_NECGOIATION_TIMER_VALUES_DEFAULT_MASK (0x7D00676F) +#define SCU_LINK_LAYER_SPEED_NECGOIATION_TIMER_VALUES_RESERVED_MASK (0x00FF0000) + +#define SCU_SAS_SPDTOV_GEN_VALUE(name, value) \ + SCU_GEN_VALUE(SCU_LINK_LAYER_SPEED_NEGOTIATION_TIMER_VALUES_ ## name, value) + + +#define SCU_LINK_STATUS_DWORD_SYNC_AQUIRED_SHIFT (2) +#define SCU_LINK_STATUS_DWORD_SYNC_AQUIRED_MASK (0x00000004) +#define SCU_LINK_STATUS_TRANSMIT_PORT_SELECTION_DONE_SHIFT (4) +#define SCU_LINK_STATUS_TRANSMIT_PORT_SELECTION_DONE_MASK (0x00000010) +#define SCU_LINK_STATUS_RECEIVER_CREDIT_EXHAUSTED_SHIFT (5) +#define SCU_LINK_STATUS_RECEIVER_CREDIT_EXHAUSTED_MASK (0x00000020) +#define SCU_LINK_STATUS_RESERVED_MASK (0xFFFFFFCD) + +#define SCU_SAS_LLSTA_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_LINK_STATUS_ ## name) + + +/* TODO: Where is the SATA_PSELTOV register? */ + +/* + * ***************************************************************************** + * * SCU SAS Maximum Arbitration Wait Time Timeout Register + * ***************************************************************************** */ +#define SCU_SAS_MAX_ARBITRATION_WAIT_TIME_TIMEOUT_VALUE_SHIFT (0) +#define SCU_SAS_MAX_ARBITRATION_WAIT_TIME_TIMEOUT_VALUE_MASK (0x00007FFF) +#define SCU_SAS_MAX_ARBITRATION_WAIT_TIME_TIMEOUT_SCALE_SHIFT (15) +#define SCU_SAS_MAX_ARBITRATION_WAIT_TIME_TIMEOUT_SCALE_MASK (0x00008000) + +#define SCU_SAS_MAWTTOV_GEN_VALUE(name, value) \ + SCU_GEN_VALUE(SCU_SAS_MAX_ARBITRATION_WAIT_TIME_TIMEOUT_ ## name, value) + +#define SCU_SAS_MAWTTOV_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SAS_MAX_ARBITRATION_WAIT_TIME_TIMEOUT_ ## name) + + +/* + * TODO: Where is the SAS_LNKTOV regsiter? + * TODO: Where is the SAS_PHYTOV register? */ + +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SMP_TARGET_SHIFT (1) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SMP_TARGET_MASK (0x00000002) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_STP_TARGET_SHIFT (2) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_STP_TARGET_MASK (0x00000004) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SSP_TARGET_SHIFT (3) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SSP_TARGET_MASK (0x00000008) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_DA_SATA_HOST_SHIFT (8) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_DA_SATA_HOST_MASK (0x00000100) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SMP_INITIATOR_SHIFT (9) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SMP_INITIATOR_MASK (0x00000200) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_STP_INITIATOR_SHIFT (10) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_STP_INITIATOR_MASK (0x00000400) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SSP_INITIATOR_SHIFT (11) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_SSP_INITIATOR_MASK (0x00000800) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_REASON_CODE_SHIFT (16) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_REASON_CODE_MASK (0x000F0000) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_ADDRESS_FRAME_TYPE_SHIFT (24) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_ADDRESS_FRAME_TYPE_MASK (0x0F000000) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_DEVICE_TYPE_SHIFT (28) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_DEVICE_TYPE_MASK (0x70000000) +#define SCU_SAS_TRANSMIT_IDENTIFICATION_RESERVED_MASK (0x80F0F1F1) + +#define SCU_SAS_TIID_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SAS_TRANSMIT_IDENTIFICATION_ ## name, value) + +#define SCU_SAS_TIID_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SAS_TRANSMIT_IDENTIFICATION_ ## name) + +/* SAS Identify Frame PHY Identifier Register */ +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_BREAK_REPLY_CAPABLE_SHIFT (16) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_BREAK_REPLY_CAPABLE_MASK (0x00010000) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_REQUESTED_INSIDE_ZPSDS_SHIFT (17) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_REQUESTED_INSIDE_ZPSDS_MASK (0x00020000) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_INSIDE_ZPSDS_PERSISTENT_SHIFT (18) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_INSIDE_ZPSDS_PERSISTENT_MASK (0x00040000) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_ID_SHIFT (24) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_ID_MASK (0xFF000000) +#define SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_RESERVED_MASK (0x00F800FF) + +#define SCU_SAS_TIPID_GEN_VALUE(name, value) \ + SCU_GEN_VALUE(SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_ ## name, value) + +#define SCU_SAS_TIPID_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_LINK_LAYER_IDENTIFY_FRAME_PHY_IDENTIFIER_ ## name) + + +#define SCU_SAS_PHY_CONFIGURATION_TX_PARITY_CHECK_SHIFT (4) +#define SCU_SAS_PHY_CONFIGURATION_TX_PARITY_CHECK_MASK (0x00000010) +#define SCU_SAS_PHY_CONFIGURATION_TX_BAD_CRC_SHIFT (6) +#define SCU_SAS_PHY_CONFIGURATION_TX_BAD_CRC_MASK (0x00000040) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_SCRAMBLER_SHIFT (7) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_SCRAMBLER_MASK (0x00000080) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_DESCRAMBLER_SHIFT (8) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_DESCRAMBLER_MASK (0x00000100) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_CREDIT_INSERTION_SHIFT (9) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_CREDIT_INSERTION_MASK (0x00000200) +#define SCU_SAS_PHY_CONFIGURATION_SUSPEND_PROTOCOL_ENGINE_SHIFT (11) +#define SCU_SAS_PHY_CONFIGURATION_SUSPEND_PROTOCOL_ENGINE_MASK (0x00000800) +#define SCU_SAS_PHY_CONFIGURATION_SATA_SPINUP_HOLD_SHIFT (12) +#define SCU_SAS_PHY_CONFIGURATION_SATA_SPINUP_HOLD_MASK (0x00001000) +#define SCU_SAS_PHY_CONFIGURATION_TRANSMIT_PORT_SELECTION_SIGNAL_SHIFT (13) +#define SCU_SAS_PHY_CONFIGURATION_TRANSMIT_PORT_SELECTION_SIGNAL_MASK (0x00002000) +#define SCU_SAS_PHY_CONFIGURATION_HARD_RESET_SHIFT (14) +#define SCU_SAS_PHY_CONFIGURATION_HARD_RESET_MASK (0x00004000) +#define SCU_SAS_PHY_CONFIGURATION_OOB_ENABLE_SHIFT (15) +#define SCU_SAS_PHY_CONFIGURATION_OOB_ENABLE_MASK (0x00008000) +#define SCU_SAS_PHY_CONFIGURATION_ENABLE_FRAME_TX_INSERT_ALIGN_SHIFT (23) +#define SCU_SAS_PHY_CONFIGURATION_ENABLE_FRAME_TX_INSERT_ALIGN_MASK (0x00800000) +#define SCU_SAS_PHY_CONFIGURATION_FORWARD_IDENTIFY_FRAME_SHIFT (27) +#define SCU_SAS_PHY_CONFIGURATION_FORWARD_IDENTIFY_FRAME_MASK (0x08000000) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_BYTE_TRANSPOSE_STP_FRAME_SHIFT (28) +#define SCU_SAS_PHY_CONFIGURATION_DISABLE_BYTE_TRANSPOSE_STP_FRAME_MASK (0x10000000) +#define SCU_SAS_PHY_CONFIGURATION_OOB_RESET_SHIFT (29) +#define SCU_SAS_PHY_CONFIGURATION_OOB_RESET_MASK (0x20000000) +#define SCU_SAS_PHY_CONFIGURATION_THREE_IAF_ENABLE_SHIFT (30) +#define SCU_SAS_PHY_CONFIGURATION_THREE_IAF_ENABLE_MASK (0x40000000) +#define SCU_SAS_PHY_CONFIGURATION_OOB_ALIGN0_ENABLE_SHIFT (31) +#define SCU_SAS_PHY_CONFIGURATION_OOB_ALIGN0_ENABLE_MASK (0x80000000) +#define SCU_SAS_PHY_CONFIGURATION_REQUIRED_MASK (0x0100000F) +#define SCU_SAS_PHY_CONFIGURATION_DEFAULT_MASK (0x4180100F) +#define SCU_SAS_PHY_CONFIGURATION_RESERVED_MASK (0x00000000) + +#define SCU_SAS_PCFG_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SAS_PHY_CONFIGURATION_ ## name) + +#define SCU_LINK_LAYER_ALIGN_INSERTION_FREQUENCY_GENERAL_SHIFT (0) +#define SCU_LINK_LAYER_ALIGN_INSERTION_FREQUENCY_GENERAL_MASK (0x000007FF) +#define SCU_LINK_LAYER_ALIGN_INSERTION_FREQUENCY_CONNECTED_SHIFT (16) +#define SCU_LINK_LAYER_ALIGN_INSERTION_FREQUENCY_CONNECTED_MASK (0x00ff0000) + +#define SCU_ALIGN_INSERTION_FREQUENCY_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_LINK_LAYER_ALIGN_INSERTION_FREQUENCY_##name, value) + +#define SCU_LINK_LAYER_ENABLE_SPINUP_CONTROL_COUNT_SHIFT (0) +#define SCU_LINK_LAYER_ENABLE_SPINUP_CONTROL_COUNT_MASK (0x0003FFFF) +#define SCU_LINK_LAYER_ENABLE_SPINUP_CONTROL_ENABLE_SHIFT (31) +#define SCU_LINK_LAYER_ENABLE_SPINUP_CONTROL_ENABLE_MASK (0x80000000) +#define SCU_LINK_LAYER_ENABLE_SPINUP_CONTROL_RESERVED_MASK (0x7FFC0000) + +#define SCU_ENSPINUP_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_LINK_LAYER_ENABLE_SPINUP_CONTROL_ ## name, value) + +#define SCU_ENSPINUP_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_LINK_LAYER_ENABLE_SPINUP_CONTROL_ ## name) + + +#define SCU_LINK_LAYER_PHY_CAPABILITIES_TXSSCTYPE_SHIFT (1) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_TXSSCTYPE_MASK (0x00000002) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_RLLRATE_SHIFT (4) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_RLLRATE_MASK (0x000000F0) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SWO15GBPS_SHIFT (8) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SWO15GBPS_MASK (0x00000100) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SW15GBPS_SHIFT (9) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SW15GBPS_MASK (0x00000201) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SWO30GBPS_SHIFT (10) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SWO30GBPS_MASK (0x00000401) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SW30GBPS_SHIFT (11) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SW30GBPS_MASK (0x00000801) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SWO60GBPS_SHIFT (12) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SWO60GBPS_MASK (0x00001001) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SW60GBPS_SHIFT (13) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_SW60GBPS_MASK (0x00002001) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_EVEN_PARITY_SHIFT (31) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_EVEN_PARITY_MASK (0x80000000) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_DEFAULT_MASK (0x00003F01) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_REQUIRED_MASK (0x00000001) +#define SCU_LINK_LAYER_PHY_CAPABILITIES_RESERVED_MASK (0x7FFFC00D) + +#define SCU_SAS_PHYCAP_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_LINK_LAYER_PHY_CAPABILITIES_ ## name, value) + +#define SCU_SAS_PHYCAP_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_LINK_LAYER_PHY_CAPABILITIES_ ## name) + + +#define SCU_LINK_LAYER_PHY_SOURCE_ZONE_GROUP_CONTROL_VIRTUAL_EXPANDER_PHY_ZONE_GROUP_SHIFT (0) +#define SCU_LINK_LAYER_PHY_SOURCE_ZONE_GROUP_CONTROL_VIRTUAL_EXPANDER_PHY_ZONE_GROUP_MASK (0x000000FF) +#define SCU_LINK_LAYER_PHY_SOURCE_ZONE_GROUP_CONTROL_INSIDE_SOURCE_ZONE_GROUP_SHIFT (31) +#define SCU_LINK_LAYER_PHY_SOURCE_ZONE_GROUP_CONTROL_INSIDE_SOURCE_ZONE_GROUP_MASK (0x80000000) +#define SCU_LINK_LAYER_PHY_SOURCE_ZONE_GROUP_CONTROL_RESERVED_MASK (0x7FFFFF00) + +#define SCU_PSZGCR_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_LINK_LAYER_PHY_SOURCE_ZONE_GROUP_CONTROL_ ## name, value) + +#define SCU_PSZGCR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_LINK_LAYER_PHY_SOURCE_ZONE_GROUP_CONTROL_ ## name) + +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE0_LOCKED_SHIFT (1) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE0_LOCKED_MASK (0x00000002) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE0_UPDATING_SHIFT (2) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE0_UPDATING_MASK (0x00000004) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE1_LOCKED_SHIFT (4) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE1_LOCKED_MASK (0x00000010) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE1_UPDATING_SHIFT (5) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZONE1_UPDATING_MASK (0x00000020) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE0_SHIFT (16) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE0_MASK (0x00030000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE0_SHIFT (19) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE0_MASK (0x00080000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE1_SHIFT (20) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE1_MASK (0x00300000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE1_SHIFT (23) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE1_MASK (0x00800000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE2_SHIFT (24) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE2_MASK (0x03000000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE2_SHIFT (27) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE2_MASK (0x08000000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE3_SHIFT (28) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ZPT_ASSOCIATION_PE3_MASK (0x30000000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE3_SHIFT (31) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_AIP_ENABLE_PE3_MASK (0x80000000) +#define SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_RESERVED_MASK (0x4444FFC9) + +#define SCU_PEG_SCUVZECR_GEN_VAL(name, val) \ + SCU_GEN_VALUE(SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ ## name, val) + +#define SCU_PEG_SCUVZECR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_PROTOCOL_ENGINE_GROUP_VIRTUAL_ZONING_EXPANDER_CONTROL_ ## name) + + +/* + * ***************************************************************************** + * * Port Task Scheduler registers shift and mask values + * ***************************************************************************** */ +#define SCU_PTSG_CONTROL_IT_NEXUS_TIMEOUT_SHIFT (0) +#define SCU_PTSG_CONTROL_IT_NEXUS_TIMEOUT_MASK (0x0000FFFF) +#define SCU_PTSG_CONTROL_TASK_TIMEOUT_SHIFT (16) +#define SCU_PTSG_CONTROL_TASK_TIMEOUT_MASK (0x00FF0000) +#define SCU_PTSG_CONTROL_PTSG_ENABLE_SHIFT (24) +#define SCU_PTSG_CONTROL_PTSG_ENABLE_MASK (0x01000000) +#define SCU_PTSG_CONTROL_ETM_ENABLE_SHIFT (25) +#define SCU_PTSG_CONTROL_ETM_ENABLE_MASK (0x02000000) +#define SCU_PTSG_CONTROL_DEFAULT_MASK (0x00020002) +#define SCU_PTSG_CONTROL_REQUIRED_MASK (0x00000000) +#define SCU_PTSG_CONTROL_RESERVED_MASK (0xFC000000) + +#define SCU_PTSGCR_GEN_VAL(name, val) \ + SCU_GEN_VALUE(SCU_PTSG_CONTROL_ ## name, val) + +#define SCU_PTSGCR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_PTSG_CONTROL_ ## name) + + +/* ***************************************************************************** */ +#define SCU_PTSG_REAL_TIME_CLOCK_SHIFT (0) +#define SCU_PTSG_REAL_TIME_CLOCK_MASK (0x0000FFFF) +#define SCU_PTSG_REAL_TIME_CLOCK_RESERVED_MASK (0xFFFF0000) + +#define SCU_RTCR_GEN_VAL(name, val) \ + SCU_GEN_VALUE(SCU_PTSG_ ## name, val) + + +#define SCU_PTSG_REAL_TIME_CLOCK_CONTROL_PRESCALER_VALUE_SHIFT (0) +#define SCU_PTSG_REAL_TIME_CLOCK_CONTROL_PRESCALER_VALUE_MASK (0x00FFFFFF) +#define SCU_PTSG_REAL_TIME_CLOCK_CONTROL_RESERVED_MASK (0xFF000000) + +#define SCU_RTCCR_GEN_VAL(name, val) \ + SCU_GEN_VALUE(SCU_PTSG_REAL_TIME_CLOCK_CONTROL_ ## name, val) + + +#define SCU_PTSG_PORT_TASK_SCHEDULER_CONTROL_SUSPEND_SHIFT (0) +#define SCU_PTSG_PORT_TASK_SCHEDULER_CONTROL_SUSPEND_MASK (0x00000001) +#define SCU_PTSG_PORT_TASK_SCHEDULER_CONTROL_ENABLE_SHIFT (1) +#define SCU_PTSG_PORT_TASK_SCHEDULER_CONTROL_ENABLE_MASK (0x00000002) +#define SCU_PTSG_PORT_TASK_SCHEDULER_CONTROL_RESERVED_MASK (0xFFFFFFFC) + +#define SCU_PTSxCR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_PTSG_PORT_TASK_SCHEDULER_CONTROL_ ## name) + + +#define SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_NEXT_RN_VALID_SHIFT (0) +#define SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_NEXT_RN_VALID_MASK (0x00000001) +#define SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_ACTIVE_RNSC_LIST_VALID_SHIFT (1) +#define SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_ACTIVE_RNSC_LIST_VALID_MASK (0x00000002) +#define SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_PTS_SUSPENDED_SHIFT (2) +#define SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_PTS_SUSPENDED_MASK (0x00000004) +#define SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_RESERVED_MASK (0xFFFFFFF8) + +#define SCU_PTSxSR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_PTSG_PORT_TASK_SCHEDULER_STATUS_ ## name) + + +/* + * ***************************************************************************** + * * SGPIO Register shift and mask values + * ***************************************************************************** */ +#define SCU_SGPIO_CONTROL_SGPIO_ENABLE_SHIFT (0) +#define SCU_SGPIO_CONTROL_SGPIO_ENABLE_MASK (0x00000001) +#define SCU_SGPIO_CONTROL_SGPIO_SERIAL_CLOCK_SELECT_SHIFT (1) +#define SCU_SGPIO_CONTROL_SGPIO_SERIAL_CLOCK_SELECT_MASK (0x00000002) +#define SCU_SGPIO_CONTROL_SGPIO_SERIAL_SHIFT_WIDTH_SELECT_SHIFT (2) +#define SCU_SGPIO_CONTROL_SGPIO_SERIAL_SHIFT_WIDTH_SELECT_MASK (0x00000004) +#define SCU_SGPIO_CONTROL_SGPIO_TEST_BIT_SHIFT (15) +#define SCU_SGPIO_CONTROL_SGPIO_TEST_BIT_MASK (0x00008000) +#define SCU_SGPIO_CONTROL_SGPIO_RESERVED_MASK (0xFFFF7FF8) + +#define SCU_SGICRx_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SGPIO_CONTROL_SGPIO_ ## name) + +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R0_SHIFT (0) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R0_MASK (0x0000000F) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R1_SHIFT (4) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R1_MASK (0x000000F0) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R2_SHIFT (8) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R2_MASK (0x00000F00) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R3_SHIFT (12) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_R3_MASK (0x0000F000) +#define SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_RESERVED_MASK (0xFFFF0000) + +#define SCU_SGPBRx_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SGPIO_PROGRAMMABLE_BLINK_REGISTER_ ## name, value) + +#define SCU_SGPIO_START_DRIVE_LOWER_R0_SHIFT (0) +#define SCU_SGPIO_START_DRIVE_LOWER_R0_MASK (0x00000003) +#define SCU_SGPIO_START_DRIVE_LOWER_R1_SHIFT (4) +#define SCU_SGPIO_START_DRIVE_LOWER_R1_MASK (0x00000030) +#define SCU_SGPIO_START_DRIVE_LOWER_R2_SHIFT (8) +#define SCU_SGPIO_START_DRIVE_LOWER_R2_MASK (0x00000300) +#define SCU_SGPIO_START_DRIVE_LOWER_R3_SHIFT (12) +#define SCU_SGPIO_START_DRIVE_LOWER_R3_MASK (0x00003000) +#define SCU_SGPIO_START_DRIVE_LOWER_RESERVED_MASK (0xFFFF8888) + +#define SCU_SGSDLRx_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SGPIO_START_DRIVE_LOWER_ ## name, value) + +#define SCU_SGPIO_START_DRIVE_UPPER_R0_SHIFT (0) +#define SCU_SGPIO_START_DRIVE_UPPER_R0_MASK (0x00000003) +#define SCU_SGPIO_START_DRIVE_UPPER_R1_SHIFT (4) +#define SCU_SGPIO_START_DRIVE_UPPER_R1_MASK (0x00000030) +#define SCU_SGPIO_START_DRIVE_UPPER_R2_SHIFT (8) +#define SCU_SGPIO_START_DRIVE_UPPER_R2_MASK (0x00000300) +#define SCU_SGPIO_START_DRIVE_UPPER_R3_SHIFT (12) +#define SCU_SGPIO_START_DRIVE_UPPER_R3_MASK (0x00003000) +#define SCU_SGPIO_START_DRIVE_UPPER_RESERVED_MASK (0xFFFF8888) + +#define SCU_SGSDURx_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SGPIO_START_DRIVE_LOWER_ ## name, value) + +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D0_SHIFT (0) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D0_MASK (0x00000003) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D1_SHIFT (4) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D1_MASK (0x00000030) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D2_SHIFT (8) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D2_MASK (0x00000300) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D3_SHIFT (12) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_D3_MASK (0x00003000) +#define SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_RESERVED_MASK (0xFFFF8888) + +#define SCU_SGSIDLRx_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_ ## name, value) + +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D0_SHIFT (0) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D0_MASK (0x00000003) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D1_SHIFT (4) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D1_MASK (0x00000030) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D2_SHIFT (8) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D2_MASK (0x00000300) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D3_SHIFT (12) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_D3_MASK (0x00003000) +#define SCU_SGPIO_SERIAL_INPUT_DATA_UPPER_RESERVED_MASK (0xFFFF8888) + +#define SCU_SGSIDURx_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SGPIO_SERIAL_INPUT_DATA_LOWER_ ## name, value) + +#define SCU_SGPIO_VENDOR_SPECIFIC_CODE_SHIFT (0) +#define SCU_SGPIO_VENDOR_SPECIFIC_CODE_MASK (0x0000000F) +#define SCU_SGPIO_VENDOR_SPECIFIC_CODE_RESERVED_MASK (0xFFFFFFF0) + +#define SCU_SGVSCR_GEN_VAL(value) \ + SCU_GEN_VALUE(SCU_SGPIO_VENDOR_SPECIFIC_CODE ## name, value) + +#define SCU_SGPIO_OUPUT_DATA_SELECT_INPUT_DATA0_SHIFT (0) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INPUT_DATA0_MASK (0x00000003) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INVERT_INPUT_DATA0_SHIFT (2) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INVERT_INPUT_DATA0_MASK (0x00000004) +#define SCU_SGPIO_OUPUT_DATA_SELECT_JOG_ENABLE_DATA0_SHIFT (3) +#define SCU_SGPIO_OUPUT_DATA_SELECT_JOG_ENABLE_DATA0_MASK (0x00000008) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INPUT_DATA1_SHIFT (4) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INPUT_DATA1_MASK (0x00000030) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INVERT_INPUT_DATA1_SHIFT (6) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INVERT_INPUT_DATA1_MASK (0x00000040) +#define SCU_SGPIO_OUPUT_DATA_SELECT_JOG_ENABLE_DATA1_SHIFT (7) +#define SCU_SGPIO_OUPUT_DATA_SELECT_JOG_ENABLE_DATA1_MASK (0x00000080) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INPUT_DATA2_SHIFT (8) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INPUT_DATA2_MASK (0x00000300) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INVERT_INPUT_DATA2_SHIFT (10) +#define SCU_SGPIO_OUPUT_DATA_SELECT_INVERT_INPUT_DATA2_MASK (0x00000400) +#define SCU_SGPIO_OUPUT_DATA_SELECT_JOG_ENABLE_DATA2_SHIFT (11) +#define SCU_SGPIO_OUPUT_DATA_SELECT_JOG_ENABLE_DATA2_MASK (0x00000800) +#define SCU_SGPIO_OUPUT_DATA_SELECT_RESERVED_MASK (0xFFFFF000) + +#define SCU_SGODSR_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SGPIO_OUPUT_DATA_SELECT_ ## name, value) + +#define SCU_SGODSR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SGPIO_OUPUT_DATA_SELECT_ ## name) + +/* + * ***************************************************************************** + * * SMU Registers + * ***************************************************************************** */ + +/* + * ---------------------------------------------------------------------------- + * SMU Registers + * These registers are based off of BAR0 + * + * To calculate the offset for other functions use + * BAR0 + FN# * SystemPageSize * 2 + * + * The TCA is only accessable from FN#0 (Physical Function) and each + * is programmed by (BAR0 + SCU_SMU_TCA_OFFSET + (FN# * 0x04)) or + * TCA0 for FN#0 is at BAR0 + 0x0400 + * TCA1 for FN#1 is at BAR0 + 0x0404 + * etc. + * ---------------------------------------------------------------------------- + * Accessable to all FN#s */ +#define SCU_SMU_PCP_OFFSET 0x0000 +#define SCU_SMU_AMR_OFFSET 0x0004 +#define SCU_SMU_ISR_OFFSET 0x0010 +#define SCU_SMU_IMR_OFFSET 0x0014 +#define SCU_SMU_ICC_OFFSET 0x0018 +#define SCU_SMU_HTTLBAR_OFFSET 0x0020 +#define SCU_SMU_HTTUBAR_OFFSET 0x0024 +#define SCU_SMU_TCR_OFFSET 0x0028 +#define SCU_SMU_CQLBAR_OFFSET 0x0030 +#define SCU_SMU_CQUBAR_OFFSET 0x0034 +#define SCU_SMU_CQPR_OFFSET 0x0040 +#define SCU_SMU_CQGR_OFFSET 0x0044 +#define SCU_SMU_CQC_OFFSET 0x0048 +/* Accessable to FN#0 only */ +#define SCU_SMU_RNCLBAR_OFFSET 0x0080 +#define SCU_SMU_RNCUBAR_OFFSET 0x0084 +#define SCU_SMU_DCC_OFFSET 0x0090 +#define SCU_SMU_DFC_OFFSET 0x0094 +#define SCU_SMU_SMUCSR_OFFSET 0x0098 +#define SCU_SMU_SCUSRCR_OFFSET 0x009C +#define SCU_SMU_SMAW_OFFSET 0x00A0 +#define SCU_SMU_SMDW_OFFSET 0x00A4 +/* Accessable to FN#0 only */ +#define SCU_SMU_TCA_OFFSET 0x0400 +/* Accessable to all FN#s */ +#define SCU_SMU_MT_MLAR0_OFFSET 0x2000 +#define SCU_SMU_MT_MUAR0_OFFSET 0x2004 +#define SCU_SMU_MT_MDR0_OFFSET 0x2008 +#define SCU_SMU_MT_VCR0_OFFSET 0x200C +#define SCU_SMU_MT_MLAR1_OFFSET 0x2010 +#define SCU_SMU_MT_MUAR1_OFFSET 0x2014 +#define SCU_SMU_MT_MDR1_OFFSET 0x2018 +#define SCU_SMU_MT_VCR1_OFFSET 0x201C +#define SCU_SMU_MPBA_OFFSET 0x3000 + +/** + * struct smu_registers - These are the SMU registers + * + * + */ +struct smu_registers { +/* 0x0000 PCP */ + u32 post_context_port; +/* 0x0004 AMR */ + u32 address_modifier; + u32 reserved_08; + u32 reserved_0C; +/* 0x0010 ISR */ + u32 interrupt_status; +/* 0x0014 IMR */ + u32 interrupt_mask; +/* 0x0018 ICC */ + u32 interrupt_coalesce_control; + u32 reserved_1C; +/* 0x0020 HTTLBAR */ + u32 host_task_table_lower; +/* 0x0024 HTTUBAR */ + u32 host_task_table_upper; +/* 0x0028 TCR */ + u32 task_context_range; + u32 reserved_2C; +/* 0x0030 CQLBAR */ + u32 completion_queue_lower; +/* 0x0034 CQUBAR */ + u32 completion_queue_upper; + u32 reserved_38; + u32 reserved_3C; +/* 0x0040 CQPR */ + u32 completion_queue_put; +/* 0x0044 CQGR */ + u32 completion_queue_get; +/* 0x0048 CQC */ + u32 completion_queue_control; + u32 reserved_4C; + u32 reserved_5x[4]; + u32 reserved_6x[4]; + u32 reserved_7x[4]; +/* + * Accessable to FN#0 only + * 0x0080 RNCLBAR */ + u32 remote_node_context_lower; +/* 0x0084 RNCUBAR */ + u32 remote_node_context_upper; + u32 reserved_88; + u32 reserved_8C; +/* 0x0090 DCC */ + u32 device_context_capacity; +/* 0x0094 DFC */ + u32 device_function_capacity; +/* 0x0098 SMUCSR */ + u32 control_status; +/* 0x009C SCUSRCR */ + u32 soft_reset_control; +/* 0x00A0 SMAW */ + u32 mmr_address_window; +/* 0x00A4 SMDW */ + u32 mmr_data_window; + u32 reserved_A8; + u32 reserved_AC; +/* A whole bunch of reserved space */ + u32 reserved_Bx[4]; + u32 reserved_Cx[4]; + u32 reserved_Dx[4]; + u32 reserved_Ex[4]; + u32 reserved_Fx[4]; + u32 reserved_1xx[64]; + u32 reserved_2xx[64]; + u32 reserved_3xx[64]; +/* + * Accessable to FN#0 only + * 0x0400 TCA */ + u32 task_context_assignment[256]; +/* MSI-X registers not included */ +}; + +/* + * ***************************************************************************** + * SDMA Registers + * ***************************************************************************** */ +#define SCU_SDMA_BASE 0x6000 +#define SCU_SDMA_PUFATLHAR_OFFSET 0x0000 +#define SCU_SDMA_PUFATUHAR_OFFSET 0x0004 +#define SCU_SDMA_UFLHBAR_OFFSET 0x0008 +#define SCU_SDMA_UFUHBAR_OFFSET 0x000C +#define SCU_SDMA_UFQC_OFFSET 0x0010 +#define SCU_SDMA_UFQPP_OFFSET 0x0014 +#define SCU_SDMA_UFQGP_OFFSET 0x0018 +#define SCU_SDMA_PDMACR_OFFSET 0x001C +#define SCU_SDMA_CDMACR_OFFSET 0x0080 + +/** + * struct scu_sdma_registers - These are the SCU SDMA Registers + * + * + */ +struct scu_sdma_registers { +/* 0x0000 PUFATLHAR */ + u32 uf_address_table_lower; +/* 0x0004 PUFATUHAR */ + u32 uf_address_table_upper; +/* 0x0008 UFLHBAR */ + u32 uf_header_base_address_lower; +/* 0x000C UFUHBAR */ + u32 uf_header_base_address_upper; +/* 0x0010 UFQC */ + u32 unsolicited_frame_queue_control; +/* 0x0014 UFQPP */ + u32 unsolicited_frame_put_pointer; +/* 0x0018 UFQGP */ + u32 unsolicited_frame_get_pointer; +/* 0x001C PDMACR */ + u32 pdma_configuration; +/* Reserved until offset 0x80 */ + u32 reserved_0020_007C[0x18]; +/* 0x0080 CDMACR */ + u32 cdma_configuration; +/* Remainder SDMA register space */ + u32 reserved_0084_0400[0xDF]; + +}; + +/* + * ***************************************************************************** + * * SCU Link Registers + * ***************************************************************************** */ +#define SCU_PEG0_OFFSET 0x0000 +#define SCU_PEG1_OFFSET 0x8000 + +#define SCU_TL0_OFFSET 0x0000 +#define SCU_TL1_OFFSET 0x0400 +#define SCU_TL2_OFFSET 0x0800 +#define SCU_TL3_OFFSET 0x0C00 + +#define SCU_LL_OFFSET 0x0080 +#define SCU_LL0_OFFSET (SCU_TL0_OFFSET + SCU_LL_OFFSET) +#define SCU_LL1_OFFSET (SCU_TL1_OFFSET + SCU_LL_OFFSET) +#define SCU_LL2_OFFSET (SCU_TL2_OFFSET + SCU_LL_OFFSET) +#define SCU_LL3_OFFSET (SCU_TL3_OFFSET + SCU_LL_OFFSET) + +/* Transport Layer Offsets (PEG + TL) */ +#define SCU_TLCR_OFFSET 0x0000 +#define SCU_TLADTR_OFFSET 0x0004 +#define SCU_TLTTMR_OFFSET 0x0008 +#define SCU_TLEECR0_OFFSET 0x000C +#define SCU_STPTLDARNI_OFFSET 0x0010 + + +#define SCU_TLCR_HASH_SAS_CHECKING_ENABLE_SHIFT (0) +#define SCU_TLCR_HASH_SAS_CHECKING_ENABLE_MASK (0x00000001) +#define SCU_TLCR_CLEAR_TCI_NCQ_MAPPING_TABLE_SHIFT (1) +#define SCU_TLCR_CLEAR_TCI_NCQ_MAPPING_TABLE_MASK (0x00000002) +#define SCU_TLCR_STP_WRITE_DATA_PREFETCH_SHIFT (3) +#define SCU_TLCR_STP_WRITE_DATA_PREFETCH_MASK (0x00000008) +#define SCU_TLCR_CMD_NAK_STATUS_CODE_SHIFT (4) +#define SCU_TLCR_CMD_NAK_STATUS_CODE_MASK (0x00000010) +#define SCU_TLCR_RESERVED_MASK (0xFFFFFFEB) + +#define SCU_TLCR_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_TLCR_ ## name) + +/** + * struct scu_transport_layer_registers - These are the SCU Transport Layer + * registers + * + * + */ +struct scu_transport_layer_registers { + /* 0x0000 TLCR */ + u32 control; + /* 0x0004 TLADTR */ + u32 arbitration_delay_timer; + /* 0x0008 TLTTMR */ + u32 timer_test_mode; + /* 0x000C reserved */ + u32 reserved_0C; + /* 0x0010 STPTLDARNI */ + u32 stp_rni; + /* 0x0014 TLFEWPORCTRL */ + u32 tlfe_wpo_read_control; + /* 0x0018 TLFEWPORDATA */ + u32 tlfe_wpo_read_data; + /* 0x001C RXTLSSCSR1 */ + u32 rxtl_single_step_control_status_1; + /* 0x0020 RXTLSSCSR2 */ + u32 rxtl_single_step_control_status_2; + /* 0x0024 AWTRDDCR */ + u32 tlfe_awt_retry_delay_debug_control; + /* Remainder of TL memory space */ + u32 reserved_0028_007F[0x16]; + +}; + +/* Protocol Engine Group Registers */ +#define SCU_SCUVZECRx_OFFSET 0x1080 + +/* Link Layer Offsets (PEG + TL + LL) */ +#define SCU_SAS_SPDTOV_OFFSET 0x0000 +#define SCU_SAS_LLSTA_OFFSET 0x0004 +#define SCU_SATA_PSELTOV_OFFSET 0x0008 +#define SCU_SAS_TIMETOV_OFFSET 0x0010 +#define SCU_SAS_LOSTOT_OFFSET 0x0014 +#define SCU_SAS_LNKTOV_OFFSET 0x0018 +#define SCU_SAS_PHYTOV_OFFSET 0x001C +#define SCU_SAS_AFERCNT_OFFSET 0x0020 +#define SCU_SAS_WERCNT_OFFSET 0x0024 +#define SCU_SAS_TIID_OFFSET 0x0028 +#define SCU_SAS_TIDNH_OFFSET 0x002C +#define SCU_SAS_TIDNL_OFFSET 0x0030 +#define SCU_SAS_TISSAH_OFFSET 0x0034 +#define SCU_SAS_TISSAL_OFFSET 0x0038 +#define SCU_SAS_TIPID_OFFSET 0x003C +#define SCU_SAS_TIRES2_OFFSET 0x0040 +#define SCU_SAS_ADRSTA_OFFSET 0x0044 +#define SCU_SAS_MAWTTOV_OFFSET 0x0048 +#define SCU_SAS_FRPLDFIL_OFFSET 0x0054 +#define SCU_SAS_RFCNT_OFFSET 0x0060 +#define SCU_SAS_TFCNT_OFFSET 0x0064 +#define SCU_SAS_RFDCNT_OFFSET 0x0068 +#define SCU_SAS_TFDCNT_OFFSET 0x006C +#define SCU_SAS_LERCNT_OFFSET 0x0070 +#define SCU_SAS_RDISERRCNT_OFFSET 0x0074 +#define SCU_SAS_CRERCNT_OFFSET 0x0078 +#define SCU_STPCTL_OFFSET 0x007C +#define SCU_SAS_PCFG_OFFSET 0x0080 +#define SCU_SAS_CLKSM_OFFSET 0x0084 +#define SCU_SAS_TXCOMWAKE_OFFSET 0x0088 +#define SCU_SAS_TXCOMINIT_OFFSET 0x008C +#define SCU_SAS_TXCOMSAS_OFFSET 0x0090 +#define SCU_SAS_COMINIT_OFFSET 0x0094 +#define SCU_SAS_COMWAKE_OFFSET 0x0098 +#define SCU_SAS_COMSAS_OFFSET 0x009C +#define SCU_SAS_SFERCNT_OFFSET 0x00A0 +#define SCU_SAS_CDFERCNT_OFFSET 0x00A4 +#define SCU_SAS_DNFERCNT_OFFSET 0x00A8 +#define SCU_SAS_PRSTERCNT_OFFSET 0x00AC +#define SCU_SAS_CNTCTL_OFFSET 0x00B0 +#define SCU_SAS_SSPTOV_OFFSET 0x00B4 +#define SCU_FTCTL_OFFSET 0x00B8 +#define SCU_FRCTL_OFFSET 0x00BC +#define SCU_FTWMRK_OFFSET 0x00C0 +#define SCU_ENSPINUP_OFFSET 0x00C4 +#define SCU_SAS_TRNTOV_OFFSET 0x00C8 +#define SCU_SAS_PHYCAP_OFFSET 0x00CC +#define SCU_SAS_PHYCTL_OFFSET 0x00D0 +#define SCU_SAS_LLCTL_OFFSET 0x00D8 +#define SCU_AFE_XCVRCR_OFFSET 0x00DC +#define SCU_AFE_LUTCR_OFFSET 0x00E0 + +#define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_SHIFT (0) +#define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_MASK (0x00000003) +#define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN1 (0) +#define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN2 (1) +#define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN3 (2) +#define SCU_SAS_LINK_LAYER_CONTROL_BROADCAST_PRIMITIVE_SHIFT (2) +#define SCU_SAS_LINK_LAYER_CONTROL_BROADCAST_PRIMITIVE_MASK (0x000003FC) +#define SCU_SAS_LINK_LAYER_CONTROL_CLOSE_NO_ACTIVE_TASK_DISABLE_SHIFT (16) +#define SCU_SAS_LINK_LAYER_CONTROL_CLOSE_NO_ACTIVE_TASK_DISABLE_MASK (0x00010000) +#define SCU_SAS_LINK_LAYER_CONTROL_CLOSE_NO_OUTBOUND_TASK_DISABLE_SHIFT (17) +#define SCU_SAS_LINK_LAYER_CONTROL_CLOSE_NO_OUTBOUND_TASK_DISABLE_MASK (0x00020000) +#define SCU_SAS_LINK_LAYER_CONTROL_NO_OUTBOUND_TASK_TIMEOUT_SHIFT (24) +#define SCU_SAS_LINK_LAYER_CONTROL_NO_OUTBOUND_TASK_TIMEOUT_MASK (0xFF000000) +#define SCU_SAS_LINK_LAYER_CONTROL_RESERVED (0x00FCFC00) + +#define SCU_SAS_LLCTL_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SCU_SAS_LINK_LAYER_CONTROL_ ## name, value) + +#define SCU_SAS_LLCTL_GEN_BIT(name) \ + SCU_GEN_BIT(SCU_SAS_LINK_LAYER_CONTROL_ ## name) + + +/* #define SCU_FRXHECR_DCNT_OFFSET 0x00B0 */ +#define SCU_PSZGCR_OFFSET 0x00E4 +#define SCU_SAS_RECPHYCAP_OFFSET 0x00E8 +/* #define SCU_TX_LUTSEL_OFFSET 0x00B8 */ + +#define SCU_SAS_PTxC_OFFSET 0x00D4 /* Same offset as SAS_TCTSTM */ + +/** + * struct scu_link_layer_registers - SCU Link Layer Registers + * + * + */ +struct scu_link_layer_registers { +/* 0x0000 SAS_SPDTOV */ + u32 speed_negotiation_timers; +/* 0x0004 SAS_LLSTA */ + u32 link_layer_status; +/* 0x0008 SATA_PSELTOV */ + u32 port_selector_timeout; + u32 reserved0C; +/* 0x0010 SAS_TIMETOV */ + u32 timeout_unit_value; +/* 0x0014 SAS_RCDTOV */ + u32 rcd_timeout; +/* 0x0018 SAS_LNKTOV */ + u32 link_timer_timeouts; +/* 0x001C SAS_PHYTOV */ + u32 sas_phy_timeouts; +/* 0x0020 SAS_AFERCNT */ + u32 received_address_frame_error_counter; +/* 0x0024 SAS_WERCNT */ + u32 invalid_dword_counter; +/* 0x0028 SAS_TIID */ + u32 transmit_identification; +/* 0x002C SAS_TIDNH */ + u32 sas_device_name_high; +/* 0x0030 SAS_TIDNL */ + u32 sas_device_name_low; +/* 0x0034 SAS_TISSAH */ + u32 source_sas_address_high; +/* 0x0038 SAS_TISSAL */ + u32 source_sas_address_low; +/* 0x003C SAS_TIPID */ + u32 identify_frame_phy_id; +/* 0x0040 SAS_TIRES2 */ + u32 identify_frame_reserved; +/* 0x0044 SAS_ADRSTA */ + u32 received_address_frame; +/* 0x0048 SAS_MAWTTOV */ + u32 maximum_arbitration_wait_timer_timeout; +/* 0x004C SAS_PTxC */ + u32 transmit_primitive; +/* 0x0050 SAS_RORES */ + u32 error_counter_event_notification_control; +/* 0x0054 SAS_FRPLDFIL */ + u32 frxq_payload_fill_threshold; +/* 0x0058 SAS_LLHANG_TOT */ + u32 link_layer_hang_detection_timeout; + u32 reserved_5C; +/* 0x0060 SAS_RFCNT */ + u32 received_frame_count; +/* 0x0064 SAS_TFCNT */ + u32 transmit_frame_count; +/* 0x0068 SAS_RFDCNT */ + u32 received_dword_count; +/* 0x006C SAS_TFDCNT */ + u32 transmit_dword_count; +/* 0x0070 SAS_LERCNT */ + u32 loss_of_sync_error_count; +/* 0x0074 SAS_RDISERRCNT */ + u32 running_disparity_error_count; +/* 0x0078 SAS_CRERCNT */ + u32 received_frame_crc_error_count; +/* 0x007C STPCTL */ + u32 stp_control; +/* 0x0080 SAS_PCFG */ + u32 phy_configuration; +/* 0x0084 SAS_CLKSM */ + u32 clock_skew_management; +/* 0x0088 SAS_TXCOMWAKE */ + u32 transmit_comwake_signal; +/* 0x008C SAS_TXCOMINIT */ + u32 transmit_cominit_signal; +/* 0x0090 SAS_TXCOMSAS */ + u32 transmit_comsas_signal; +/* 0x0094 SAS_COMINIT */ + u32 cominit_control; +/* 0x0098 SAS_COMWAKE */ + u32 comwake_control; +/* 0x009C SAS_COMSAS */ + u32 comsas_control; +/* 0x00A0 SAS_SFERCNT */ + u32 received_short_frame_count; +/* 0x00A4 SAS_CDFERCNT */ + u32 received_frame_without_credit_count; +/* 0x00A8 SAS_DNFERCNT */ + u32 received_frame_after_done_count; +/* 0x00AC SAS_PRSTERCNT */ + u32 phy_reset_problem_count; +/* 0x00B0 SAS_CNTCTL */ + u32 counter_control; +/* 0x00B4 SAS_SSPTOV */ + u32 ssp_timer_timeout_values; +/* 0x00B8 FTCTL */ + u32 ftx_control; +/* 0x00BC FRCTL */ + u32 frx_control; +/* 0x00C0 FTWMRK */ + u32 ftx_watermark; +/* 0x00C4 ENSPINUP */ + u32 notify_enable_spinup_control; +/* 0x00C8 SAS_TRNTOV */ + u32 sas_training_sequence_timer_values; +/* 0x00CC SAS_PHYCAP */ + u32 phy_capabilities; +/* 0x00D0 SAS_PHYCTL */ + u32 phy_control; + u32 reserved_d4; +/* 0x00D8 LLCTL */ + u32 link_layer_control; +/* 0x00DC AFE_XCVRCR */ + u32 afe_xcvr_control; +/* 0x00E0 AFE_LUTCR */ + u32 afe_lookup_table_control; +/* 0x00E4 PSZGCR */ + u32 phy_source_zone_group_control; +/* 0x00E8 SAS_RECPHYCAP */ + u32 receive_phycap; + u32 reserved_ec; +/* 0x00F0 SNAFERXRSTCTL */ + u32 speed_negotiation_afe_rx_reset_control; +/* 0x00F4 SAS_SSIPMCTL */ + u32 power_management_control; +/* 0x00F8 SAS_PSPREQ_PRIM */ + u32 sas_pm_partial_request_primitive; +/* 0x00FC SAS_PSSREQ_PRIM */ + u32 sas_pm_slumber_request_primitive; +/* 0x0100 SAS_PPSACK_PRIM */ + u32 sas_pm_ack_primitive_register; +/* 0x0104 SAS_PSNAK_PRIM */ + u32 sas_pm_nak_primitive_register; +/* 0x0108 SAS_SSIPMTOV */ + u32 sas_primitive_timeout; + u32 reserved_10c; +/* 0x0110 - 0x011C PLAPRDCTRLxREG */ + u32 pla_product_control[4]; +/* 0x0120 PLAPRDSUMREG */ + u32 pla_product_sum; +/* 0x0124 PLACONTROLREG */ + u32 pla_control; +/* Remainder of memory space 896 bytes */ + u32 reserved_0128_037f[0x96]; + +}; + +/* + * 0x00D4 // Same offset as SAS_TCTSTM SAS_PTxC + * u32 primitive_transmit_control; */ + +/* + * ---------------------------------------------------------------------------- + * SGPIO + * ---------------------------------------------------------------------------- */ +#define SCU_SGPIO_OFFSET 0x1400 + +/* #define SCU_SGPIO_OFFSET 0x6000 // later moves to 0x1400 see HSD 652625 */ +#define SCU_SGPIO_SGICR_OFFSET 0x0000 +#define SCU_SGPIO_SGPBR_OFFSET 0x0004 +#define SCU_SGPIO_SGSDLR_OFFSET 0x0008 +#define SCU_SGPIO_SGSDUR_OFFSET 0x000C +#define SCU_SGPIO_SGSIDLR_OFFSET 0x0010 +#define SCU_SGPIO_SGSIDUR_OFFSET 0x0014 +#define SCU_SGPIO_SGVSCR_OFFSET 0x0018 +/* Address from 0x0820 to 0x083C */ +#define SCU_SGPIO_SGODSR_OFFSET 0x0020 + +/** + * struct scu_sgpio_registers - SCU SGPIO Registers + * + * + */ +struct scu_sgpio_registers { +/* 0x0000 SGPIO_SGICR */ + u32 interface_control; +/* 0x0004 SGPIO_SGPBR */ + u32 blink_rate; +/* 0x0008 SGPIO_SGSDLR */ + u32 start_drive_lower; +/* 0x000C SGPIO_SGSDUR */ + u32 start_drive_upper; +/* 0x0010 SGPIO_SGSIDLR */ + u32 serial_input_lower; +/* 0x0014 SGPIO_SGSIDUR */ + u32 serial_input_upper; +/* 0x0018 SGPIO_SGVSCR */ + u32 vendor_specific_code; +/* 0x0020 SGPIO_SGODSR */ + u32 ouput_data_select[8]; +/* Remainder of memory space 256 bytes */ + u32 reserved_1444_14ff[0x31]; + +}; + +/* + * ***************************************************************************** + * * Defines for VIIT entry offsets + * * Access additional entries by SCU_VIIT_BASE + index * 0x10 + * ***************************************************************************** */ +#define SCU_VIIT_BASE 0x1c00 + +struct scu_viit_registers { + u32 registers[256]; +}; + +/* + * ***************************************************************************** + * * SCU PORT TASK SCHEDULER REGISTERS + * ***************************************************************************** */ + +#define SCU_PTSG_BASE 0x1000 + +#define SCU_PTSG_PTSGCR_OFFSET 0x0000 +#define SCU_PTSG_RTCR_OFFSET 0x0004 +#define SCU_PTSG_RTCCR_OFFSET 0x0008 +#define SCU_PTSG_PTS0CR_OFFSET 0x0010 +#define SCU_PTSG_PTS0SR_OFFSET 0x0014 +#define SCU_PTSG_PTS1CR_OFFSET 0x0018 +#define SCU_PTSG_PTS1SR_OFFSET 0x001C +#define SCU_PTSG_PTS2CR_OFFSET 0x0020 +#define SCU_PTSG_PTS2SR_OFFSET 0x0024 +#define SCU_PTSG_PTS3CR_OFFSET 0x0028 +#define SCU_PTSG_PTS3SR_OFFSET 0x002C +#define SCU_PTSG_PCSPE0CR_OFFSET 0x0030 +#define SCU_PTSG_PCSPE1CR_OFFSET 0x0034 +#define SCU_PTSG_PCSPE2CR_OFFSET 0x0038 +#define SCU_PTSG_PCSPE3CR_OFFSET 0x003C +#define SCU_PTSG_ETMTSCCR_OFFSET 0x0040 +#define SCU_PTSG_ETMRNSCCR_OFFSET 0x0044 + +/** + * struct scu_port_task_scheduler_registers - These are the control/stats pairs + * for each Port Task Scheduler. + * + * + */ +struct scu_port_task_scheduler_registers { + u32 control; + u32 status; +}; + +/** + * struct scu_port_task_scheduler_group_registers - These are the PORT Task + * Scheduler registers + * + * + */ +struct scu_port_task_scheduler_group_registers { +/* 0x0000 PTSGCR */ + u32 control; +/* 0x0004 RTCR */ + u32 real_time_clock; +/* 0x0008 RTCCR */ + u32 real_time_clock_control; +/* 0x000C */ + u32 reserved_0C; +/* + * 0x0010 PTS0CR + * 0x0014 PTS0SR + * 0x0018 PTS1CR + * 0x001C PTS1SR + * 0x0020 PTS2CR + * 0x0024 PTS2SR + * 0x0028 PTS3CR + * 0x002C PTS3SR */ + struct scu_port_task_scheduler_registers port[4]; +/* + * 0x0030 PCSPE0CR + * 0x0034 PCSPE1CR + * 0x0038 PCSPE2CR + * 0x003C PCSPE3CR */ + u32 protocol_engine[4]; +/* 0x0040 ETMTSCCR */ + u32 tc_scanning_interval_control; +/* 0x0044 ETMRNSCCR */ + u32 rnc_scanning_interval_control; +/* Remainder of memory space 128 bytes */ + u32 reserved_1048_107f[0x0E]; + +}; + +#define SCU_PTSG_SCUVZECR_OFFSET 0x003C + +/* + * ***************************************************************************** + * * AFE REGISTERS + * ***************************************************************************** */ +#define SCU_AFE_MMR_BASE 0xE000 + +/* + * AFE 0 is at offset 0x0800 + * AFE 1 is at offset 0x0900 + * AFE 2 is at offset 0x0a00 + * AFE 3 is at offset 0x0b00 */ +struct scu_afe_transceiver { + /* 0x0000 AFE_XCVR_CTRL0 */ + u32 afe_xcvr_control0; + /* 0x0004 AFE_XCVR_CTRL1 */ + u32 afe_xcvr_control1; + /* 0x0008 */ + u32 reserved_0008; + /* 0x000c afe_dfx_rx_control0 */ + u32 afe_dfx_rx_control0; + /* 0x0010 AFE_DFX_RX_CTRL1 */ + u32 afe_dfx_rx_control1; + /* 0x0014 */ + u32 reserved_0014; + /* 0x0018 AFE_DFX_RX_STS0 */ + u32 afe_dfx_rx_status0; + /* 0x001c AFE_DFX_RX_STS1 */ + u32 afe_dfx_rx_status1; + /* 0x0020 */ + u32 reserved_0020; + /* 0x0024 AFE_TX_CTRL */ + u32 afe_tx_control; + /* 0x0028 AFE_TX_AMP_CTRL0 */ + u32 afe_tx_amp_control0; + /* 0x002c AFE_TX_AMP_CTRL1 */ + u32 afe_tx_amp_control1; + /* 0x0030 AFE_TX_AMP_CTRL2 */ + u32 afe_tx_amp_control2; + /* 0x0034 AFE_TX_AMP_CTRL3 */ + u32 afe_tx_amp_control3; + /* 0x0038 afe_tx_ssc_control */ + u32 afe_tx_ssc_control; + /* 0x003c */ + u32 reserved_003c; + /* 0x0040 AFE_RX_SSC_CTRL0 */ + u32 afe_rx_ssc_control0; + /* 0x0044 AFE_RX_SSC_CTRL1 */ + u32 afe_rx_ssc_control1; + /* 0x0048 AFE_RX_SSC_CTRL2 */ + u32 afe_rx_ssc_control2; + /* 0x004c AFE_RX_EQ_STS0 */ + u32 afe_rx_eq_status0; + /* 0x0050 AFE_RX_EQ_STS1 */ + u32 afe_rx_eq_status1; + /* 0x0054 AFE_RX_CDR_STS */ + u32 afe_rx_cdr_status; + /* 0x0058 */ + u32 reserved_0058; + /* 0x005c AFE_CHAN_CTRL */ + u32 afe_channel_control; + /* 0x0060-0x006c */ + u32 reserved_0060_006c[0x04]; + /* 0x0070 AFE_XCVR_EC_STS0 */ + u32 afe_xcvr_error_capture_status0; + /* 0x0074 AFE_XCVR_EC_STS1 */ + u32 afe_xcvr_error_capture_status1; + /* 0x0078 AFE_XCVR_EC_STS2 */ + u32 afe_xcvr_error_capture_status2; + /* 0x007c afe_xcvr_ec_status3 */ + u32 afe_xcvr_error_capture_status3; + /* 0x0080 AFE_XCVR_EC_STS4 */ + u32 afe_xcvr_error_capture_status4; + /* 0x0084 AFE_XCVR_EC_STS5 */ + u32 afe_xcvr_error_capture_status5; + /* 0x0088-0x00fc */ + u32 reserved_008c_00fc[0x1e]; +}; + +/** + * struct scu_afe_registers - AFE Regsiters + * + * + */ +/* Uaoa AFE registers */ +struct scu_afe_registers { + /* 0Xe000 AFE_BIAS_CTRL */ + u32 afe_bias_control; + u32 reserved_0004; + /* 0x0008 AFE_PLL_CTRL0 */ + u32 afe_pll_control0; + /* 0x000c AFE_PLL_CTRL1 */ + u32 afe_pll_control1; + /* 0x0010 AFE_PLL_CTRL2 */ + u32 afe_pll_control2; + /* 0x0014 AFE_CB_STS */ + u32 afe_common_block_status; + /* 0x0018-0x007c */ + u32 reserved_18_7c[0x1a]; + /* 0x0080 AFE_PMSN_MCTRL0 */ + u32 afe_pmsn_master_control0; + /* 0x0084 AFE_PMSN_MCTRL1 */ + u32 afe_pmsn_master_control1; + /* 0x0088 AFE_PMSN_MCTRL2 */ + u32 afe_pmsn_master_control2; + /* 0x008C-0x00fc */ + u32 reserved_008c_00fc[0x1D]; + /* 0x0100 AFE_DFX_MST_CTRL0 */ + u32 afe_dfx_master_control0; + /* 0x0104 AFE_DFX_MST_CTRL1 */ + u32 afe_dfx_master_control1; + /* 0x0108 AFE_DFX_DCL_CTRL */ + u32 afe_dfx_dcl_control; + /* 0x010c AFE_DFX_DMON_CTRL */ + u32 afe_dfx_digital_monitor_control; + /* 0x0110 AFE_DFX_AMONP_CTRL */ + u32 afe_dfx_analog_p_monitor_control; + /* 0x0114 AFE_DFX_AMONN_CTRL */ + u32 afe_dfx_analog_n_monitor_control; + /* 0x0118 AFE_DFX_NTL_STS */ + u32 afe_dfx_ntl_status; + /* 0x011c AFE_DFX_FIFO_STS0 */ + u32 afe_dfx_fifo_status0; + /* 0x0120 AFE_DFX_FIFO_STS1 */ + u32 afe_dfx_fifo_status1; + /* 0x0124 AFE_DFX_MPAT_CTRL */ + u32 afe_dfx_master_pattern_control; + /* 0x0128 AFE_DFX_P0_CTRL */ + u32 afe_dfx_p0_control; + /* 0x012c-0x01a8 AFE_DFX_P0_DRx */ + u32 afe_dfx_p0_data[32]; + /* 0x01ac */ + u32 reserved_01ac; + /* 0x01b0-0x020c AFE_DFX_P0_IRx */ + u32 afe_dfx_p0_instruction[24]; + /* 0x0210 */ + u32 reserved_0210; + /* 0x0214 AFE_DFX_P1_CTRL */ + u32 afe_dfx_p1_control; + /* 0x0218-0x245 AFE_DFX_P1_DRx */ + u32 afe_dfx_p1_data[16]; + /* 0x0258-0x029c */ + u32 reserved_0258_029c[0x12]; + /* 0x02a0-0x02bc AFE_DFX_P1_IRx */ + u32 afe_dfx_p1_instruction[8]; + /* 0x02c0-0x2fc */ + u32 reserved_02c0_02fc[0x10]; + /* 0x0300 AFE_DFX_TX_PMSN_CTRL */ + u32 afe_dfx_tx_pmsn_control; + /* 0x0304 AFE_DFX_RX_PMSN_CTRL */ + u32 afe_dfx_rx_pmsn_control; + u32 reserved_0308; + /* 0x030c AFE_DFX_NOA_CTRL0 */ + u32 afe_dfx_noa_control0; + /* 0x0310 AFE_DFX_NOA_CTRL1 */ + u32 afe_dfx_noa_control1; + /* 0x0314 AFE_DFX_NOA_CTRL2 */ + u32 afe_dfx_noa_control2; + /* 0x0318 AFE_DFX_NOA_CTRL3 */ + u32 afe_dfx_noa_control3; + /* 0x031c AFE_DFX_NOA_CTRL4 */ + u32 afe_dfx_noa_control4; + /* 0x0320 AFE_DFX_NOA_CTRL5 */ + u32 afe_dfx_noa_control5; + /* 0x0324 AFE_DFX_NOA_CTRL6 */ + u32 afe_dfx_noa_control6; + /* 0x0328 AFE_DFX_NOA_CTRL7 */ + u32 afe_dfx_noa_control7; + /* 0x032c-0x07fc */ + u32 reserved_032c_07fc[0x135]; + + /* 0x0800-0x0bfc */ + struct scu_afe_transceiver scu_afe_xcvr[4]; + + /* 0x0c00-0x0ffc */ + u32 reserved_0c00_0ffc[0x0100]; +}; + +struct scu_protocol_engine_group_registers { + u32 table[0xE0]; +}; + + +struct scu_viit_iit { + u32 table[256]; +}; + +/** + * Placeholder for the ZONE Partition Table information ZONING will not be + * included in the 1.1 release. + * + * + */ +struct scu_zone_partition_table { + u32 table[2048]; +}; + +/** + * Placeholder for the CRAM register since I am not sure if we need to + * read/write to these registers as yet. + * + * + */ +struct scu_completion_ram { + u32 ram[128]; +}; + +/** + * Placeholder for the FBRAM registers since I am not sure if we need to + * read/write to these registers as yet. + * + * + */ +struct scu_frame_buffer_ram { + u32 ram[128]; +}; + +#define scu_scratch_ram_SIZE_IN_DWORDS 256 + +/** + * Placeholder for the scratch RAM registers. + * + * + */ +struct scu_scratch_ram { + u32 ram[scu_scratch_ram_SIZE_IN_DWORDS]; +}; + +/** + * Placeholder since I am not yet sure what these registers are here for. + * + * + */ +struct noa_protocol_engine_partition { + u32 reserved[64]; +}; + +/** + * Placeholder since I am not yet sure what these registers are here for. + * + * + */ +struct noa_hub_partition { + u32 reserved[64]; +}; + +/** + * Placeholder since I am not yet sure what these registers are here for. + * + * + */ +struct noa_host_interface_partition { + u32 reserved[64]; +}; + +/** + * struct transport_link_layer_pair - The SCU Hardware pairs up the TL + * registers with the LL registers so we must place them adjcent to make the + * array of registers in the PEG. + * + * + */ +struct transport_link_layer_pair { + struct scu_transport_layer_registers tl; + struct scu_link_layer_registers ll; +}; + +/** + * struct scu_peg_registers - SCU Protocol Engine Memory mapped register space. + * These registers are unique to each protocol engine group. There can be + * at most two PEG for a single SCU part. + * + * + */ +struct scu_peg_registers { + struct transport_link_layer_pair pe[4]; + struct scu_port_task_scheduler_group_registers ptsg; + struct scu_protocol_engine_group_registers peg; + struct scu_sgpio_registers sgpio; + u32 reserved_01500_1BFF[0x1C0]; + struct scu_viit_entry viit[64]; + struct scu_zone_partition_table zpt0; + struct scu_zone_partition_table zpt1; +}; + +/** + * struct scu_registers - SCU regsiters including both PEG registers if we turn + * on that compile option. All of these registers are in the memory mapped + * space returned from BAR1. + * + * + */ +struct scu_registers { + /* 0x0000 - PEG 0 */ + struct scu_peg_registers peg0; + + /* 0x6000 - SDMA and Miscellaneous */ + struct scu_sdma_registers sdma; + struct scu_completion_ram cram; + struct scu_frame_buffer_ram fbram; + u32 reserved_6800_69FF[0x80]; + struct noa_protocol_engine_partition noa_pe; + struct noa_hub_partition noa_hub; + struct noa_host_interface_partition noa_if; + u32 reserved_6d00_7fff[0x4c0]; + + /* 0x8000 - PEG 1 */ + struct scu_peg_registers peg1; + + /* 0xE000 - AFE Registers */ + struct scu_afe_registers afe; + + /* 0xF000 - reserved */ + u32 reserved_f000_211fff[0x80c00]; + + /* 0x212000 - scratch RAM */ + struct scu_scratch_ram scratch_ram; +}; + +#endif /* _SCU_REGISTERS_HEADER_ */ diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c new file mode 100644 index 000000000000..b6e6368c2665 --- /dev/null +++ b/drivers/scsi/isci/remote_device.c @@ -0,0 +1,1501 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include <scsi/sas.h> +#include "isci.h" +#include "port.h" +#include "remote_device.h" +#include "request.h" +#include "remote_node_context.h" +#include "scu_event_codes.h" +#include "task.h" + +/** + * isci_remote_device_not_ready() - This function is called by the ihost when + * the remote device is not ready. We mark the isci device as ready (not + * "ready_for_io") and signal the waiting proccess. + * @isci_host: This parameter specifies the isci host object. + * @isci_device: This parameter specifies the remote device + * + * sci_lock is held on entrance to this function. + */ +static void isci_remote_device_not_ready(struct isci_host *ihost, + struct isci_remote_device *idev, u32 reason) +{ + struct isci_request *ireq; + + dev_dbg(&ihost->pdev->dev, + "%s: isci_device = %p\n", __func__, idev); + + switch (reason) { + case SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED: + set_bit(IDEV_GONE, &idev->flags); + break; + case SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED: + set_bit(IDEV_IO_NCQERROR, &idev->flags); + + /* Kill all outstanding requests for the device. */ + list_for_each_entry(ireq, &idev->reqs_in_process, dev_node) { + + dev_dbg(&ihost->pdev->dev, + "%s: isci_device = %p request = %p\n", + __func__, idev, ireq); + + sci_controller_terminate_request(ihost, + idev, + ireq); + } + /* Fall through into the default case... */ + default: + clear_bit(IDEV_IO_READY, &idev->flags); + break; + } +} + +/** + * isci_remote_device_ready() - This function is called by the ihost when the + * remote device is ready. We mark the isci device as ready and signal the + * waiting proccess. + * @ihost: our valid isci_host + * @idev: remote device + * + */ +static void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote_device *idev) +{ + dev_dbg(&ihost->pdev->dev, + "%s: idev = %p\n", __func__, idev); + + clear_bit(IDEV_IO_NCQERROR, &idev->flags); + set_bit(IDEV_IO_READY, &idev->flags); + if (test_and_clear_bit(IDEV_START_PENDING, &idev->flags)) + wake_up(&ihost->eventq); +} + +/* called once the remote node context is ready to be freed. + * The remote device can now report that its stop operation is complete. none + */ +static void rnc_destruct_done(void *_dev) +{ + struct isci_remote_device *idev = _dev; + + BUG_ON(idev->started_request_count != 0); + sci_change_state(&idev->sm, SCI_DEV_STOPPED); +} + +static enum sci_status sci_remote_device_terminate_requests(struct isci_remote_device *idev) +{ + struct isci_host *ihost = idev->owning_port->owning_controller; + enum sci_status status = SCI_SUCCESS; + u32 i; + + for (i = 0; i < SCI_MAX_IO_REQUESTS; i++) { + struct isci_request *ireq = ihost->reqs[i]; + enum sci_status s; + + if (!test_bit(IREQ_ACTIVE, &ireq->flags) || + ireq->target_device != idev) + continue; + + s = sci_controller_terminate_request(ihost, idev, ireq); + if (s != SCI_SUCCESS) + status = s; + } + + return status; +} + +enum sci_status sci_remote_device_stop(struct isci_remote_device *idev, + u32 timeout) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + + switch (state) { + case SCI_DEV_INITIAL: + case SCI_DEV_FAILED: + case SCI_DEV_FINAL: + default: + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_DEV_STOPPED: + return SCI_SUCCESS; + case SCI_DEV_STARTING: + /* device not started so there had better be no requests */ + BUG_ON(idev->started_request_count != 0); + sci_remote_node_context_destruct(&idev->rnc, + rnc_destruct_done, idev); + /* Transition to the stopping state and wait for the + * remote node to complete being posted and invalidated. + */ + sci_change_state(sm, SCI_DEV_STOPPING); + return SCI_SUCCESS; + case SCI_DEV_READY: + case SCI_STP_DEV_IDLE: + case SCI_STP_DEV_CMD: + case SCI_STP_DEV_NCQ: + case SCI_STP_DEV_NCQ_ERROR: + case SCI_STP_DEV_AWAIT_RESET: + case SCI_SMP_DEV_IDLE: + case SCI_SMP_DEV_CMD: + sci_change_state(sm, SCI_DEV_STOPPING); + if (idev->started_request_count == 0) { + sci_remote_node_context_destruct(&idev->rnc, + rnc_destruct_done, idev); + return SCI_SUCCESS; + } else + return sci_remote_device_terminate_requests(idev); + break; + case SCI_DEV_STOPPING: + /* All requests should have been terminated, but if there is an + * attempt to stop a device already in the stopping state, then + * try again to terminate. + */ + return sci_remote_device_terminate_requests(idev); + case SCI_DEV_RESETTING: + sci_change_state(sm, SCI_DEV_STOPPING); + return SCI_SUCCESS; + } +} + +enum sci_status sci_remote_device_reset(struct isci_remote_device *idev) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + + switch (state) { + case SCI_DEV_INITIAL: + case SCI_DEV_STOPPED: + case SCI_DEV_STARTING: + case SCI_SMP_DEV_IDLE: + case SCI_SMP_DEV_CMD: + case SCI_DEV_STOPPING: + case SCI_DEV_FAILED: + case SCI_DEV_RESETTING: + case SCI_DEV_FINAL: + default: + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_DEV_READY: + case SCI_STP_DEV_IDLE: + case SCI_STP_DEV_CMD: + case SCI_STP_DEV_NCQ: + case SCI_STP_DEV_NCQ_ERROR: + case SCI_STP_DEV_AWAIT_RESET: + sci_change_state(sm, SCI_DEV_RESETTING); + return SCI_SUCCESS; + } +} + +enum sci_status sci_remote_device_reset_complete(struct isci_remote_device *idev) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + + if (state != SCI_DEV_RESETTING) { + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + sci_change_state(sm, SCI_DEV_READY); + return SCI_SUCCESS; +} + +enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev, + u32 suspend_type) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + + if (state != SCI_STP_DEV_CMD) { + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + return sci_remote_node_context_suspend(&idev->rnc, + suspend_type, NULL, NULL); +} + +enum sci_status sci_remote_device_frame_handler(struct isci_remote_device *idev, + u32 frame_index) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + struct isci_host *ihost = idev->owning_port->owning_controller; + enum sci_status status; + + switch (state) { + case SCI_DEV_INITIAL: + case SCI_DEV_STOPPED: + case SCI_DEV_STARTING: + case SCI_STP_DEV_IDLE: + case SCI_SMP_DEV_IDLE: + case SCI_DEV_FINAL: + default: + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + /* Return the frame back to the controller */ + sci_controller_release_frame(ihost, frame_index); + return SCI_FAILURE_INVALID_STATE; + case SCI_DEV_READY: + case SCI_STP_DEV_NCQ_ERROR: + case SCI_STP_DEV_AWAIT_RESET: + case SCI_DEV_STOPPING: + case SCI_DEV_FAILED: + case SCI_DEV_RESETTING: { + struct isci_request *ireq; + struct ssp_frame_hdr hdr; + void *frame_header; + ssize_t word_cnt; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + &frame_header); + if (status != SCI_SUCCESS) + return status; + + word_cnt = sizeof(hdr) / sizeof(u32); + sci_swab32_cpy(&hdr, frame_header, word_cnt); + + ireq = sci_request_by_tag(ihost, be16_to_cpu(hdr.tag)); + if (ireq && ireq->target_device == idev) { + /* The IO request is now in charge of releasing the frame */ + status = sci_io_request_frame_handler(ireq, frame_index); + } else { + /* We could not map this tag to a valid IO + * request Just toss the frame and continue + */ + sci_controller_release_frame(ihost, frame_index); + } + break; + } + case SCI_STP_DEV_NCQ: { + struct dev_to_host_fis *hdr; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&hdr); + if (status != SCI_SUCCESS) + return status; + + if (hdr->fis_type == FIS_SETDEVBITS && + (hdr->status & ATA_ERR)) { + idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED; + + /* TODO Check sactive and complete associated IO if any. */ + sci_change_state(sm, SCI_STP_DEV_NCQ_ERROR); + } else if (hdr->fis_type == FIS_REGD2H && + (hdr->status & ATA_ERR)) { + /* + * Some devices return D2H FIS when an NCQ error is detected. + * Treat this like an SDB error FIS ready reason. + */ + idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED; + sci_change_state(&idev->sm, SCI_STP_DEV_NCQ_ERROR); + } else + status = SCI_FAILURE; + + sci_controller_release_frame(ihost, frame_index); + break; + } + case SCI_STP_DEV_CMD: + case SCI_SMP_DEV_CMD: + /* The device does not process any UF received from the hardware while + * in this state. All unsolicited frames are forwarded to the io request + * object. + */ + status = sci_io_request_frame_handler(idev->working_request, frame_index); + break; + } + + return status; +} + +static bool is_remote_device_ready(struct isci_remote_device *idev) +{ + + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + + switch (state) { + case SCI_DEV_READY: + case SCI_STP_DEV_IDLE: + case SCI_STP_DEV_CMD: + case SCI_STP_DEV_NCQ: + case SCI_STP_DEV_NCQ_ERROR: + case SCI_STP_DEV_AWAIT_RESET: + case SCI_SMP_DEV_IDLE: + case SCI_SMP_DEV_CMD: + return true; + default: + return false; + } +} + +enum sci_status sci_remote_device_event_handler(struct isci_remote_device *idev, + u32 event_code) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + enum sci_status status; + + switch (scu_get_event_type(event_code)) { + case SCU_EVENT_TYPE_RNC_OPS_MISC: + case SCU_EVENT_TYPE_RNC_SUSPEND_TX: + case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: + status = sci_remote_node_context_event_handler(&idev->rnc, event_code); + break; + case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT: + if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) { + status = SCI_SUCCESS; + + /* Suspend the associated RNC */ + sci_remote_node_context_suspend(&idev->rnc, + SCI_SOFTWARE_SUSPENSION, + NULL, NULL); + + dev_dbg(scirdev_to_dev(idev), + "%s: device: %p event code: %x: %s\n", + __func__, idev, event_code, + is_remote_device_ready(idev) + ? "I_T_Nexus_Timeout event" + : "I_T_Nexus_Timeout event in wrong state"); + + break; + } + /* Else, fall through and treat as unhandled... */ + default: + dev_dbg(scirdev_to_dev(idev), + "%s: device: %p event code: %x: %s\n", + __func__, idev, event_code, + is_remote_device_ready(idev) + ? "unexpected event" + : "unexpected event in wrong state"); + status = SCI_FAILURE_INVALID_STATE; + break; + } + + if (status != SCI_SUCCESS) + return status; + + if (state == SCI_STP_DEV_IDLE) { + + /* We pick up suspension events to handle specifically to this + * state. We resume the RNC right away. + */ + if (scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX || + scu_get_event_type(event_code) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX) + status = sci_remote_node_context_resume(&idev->rnc, NULL, NULL); + } + + return status; +} + +static void sci_remote_device_start_request(struct isci_remote_device *idev, + struct isci_request *ireq, + enum sci_status status) +{ + struct isci_port *iport = idev->owning_port; + + /* cleanup requests that failed after starting on the port */ + if (status != SCI_SUCCESS) + sci_port_complete_io(iport, idev, ireq); + else { + kref_get(&idev->kref); + idev->started_request_count++; + } +} + +enum sci_status sci_remote_device_start_io(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + struct isci_port *iport = idev->owning_port; + enum sci_status status; + + switch (state) { + case SCI_DEV_INITIAL: + case SCI_DEV_STOPPED: + case SCI_DEV_STARTING: + case SCI_STP_DEV_NCQ_ERROR: + case SCI_DEV_STOPPING: + case SCI_DEV_FAILED: + case SCI_DEV_RESETTING: + case SCI_DEV_FINAL: + default: + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_DEV_READY: + /* attempt to start an io request for this device object. The remote + * device object will issue the start request for the io and if + * successful it will start the request for the port object then + * increment its own request count. + */ + status = sci_port_start_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + status = sci_remote_node_context_start_io(&idev->rnc, ireq); + if (status != SCI_SUCCESS) + break; + + status = sci_request_start(ireq); + break; + case SCI_STP_DEV_IDLE: { + /* handle the start io operation for a sata device that is in + * the command idle state. - Evalute the type of IO request to + * be started - If its an NCQ request change to NCQ substate - + * If its any other command change to the CMD substate + * + * If this is a softreset we may want to have a different + * substate. + */ + enum sci_remote_device_states new_state; + struct sas_task *task = isci_request_access_task(ireq); + + status = sci_port_start_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + status = sci_remote_node_context_start_io(&idev->rnc, ireq); + if (status != SCI_SUCCESS) + break; + + status = sci_request_start(ireq); + if (status != SCI_SUCCESS) + break; + + if (task->ata_task.use_ncq) + new_state = SCI_STP_DEV_NCQ; + else { + idev->working_request = ireq; + new_state = SCI_STP_DEV_CMD; + } + sci_change_state(sm, new_state); + break; + } + case SCI_STP_DEV_NCQ: { + struct sas_task *task = isci_request_access_task(ireq); + + if (task->ata_task.use_ncq) { + status = sci_port_start_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + status = sci_remote_node_context_start_io(&idev->rnc, ireq); + if (status != SCI_SUCCESS) + break; + + status = sci_request_start(ireq); + } else + return SCI_FAILURE_INVALID_STATE; + break; + } + case SCI_STP_DEV_AWAIT_RESET: + return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; + case SCI_SMP_DEV_IDLE: + status = sci_port_start_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + status = sci_remote_node_context_start_io(&idev->rnc, ireq); + if (status != SCI_SUCCESS) + break; + + status = sci_request_start(ireq); + if (status != SCI_SUCCESS) + break; + + idev->working_request = ireq; + sci_change_state(&idev->sm, SCI_SMP_DEV_CMD); + break; + case SCI_STP_DEV_CMD: + case SCI_SMP_DEV_CMD: + /* device is already handling a command it can not accept new commands + * until this one is complete. + */ + return SCI_FAILURE_INVALID_STATE; + } + + sci_remote_device_start_request(idev, ireq, status); + return status; +} + +static enum sci_status common_complete_io(struct isci_port *iport, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + enum sci_status status; + + status = sci_request_complete(ireq); + if (status != SCI_SUCCESS) + return status; + + status = sci_port_complete_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + sci_remote_device_decrement_request_count(idev); + return status; +} + +enum sci_status sci_remote_device_complete_io(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + struct isci_port *iport = idev->owning_port; + enum sci_status status; + + switch (state) { + case SCI_DEV_INITIAL: + case SCI_DEV_STOPPED: + case SCI_DEV_STARTING: + case SCI_STP_DEV_IDLE: + case SCI_SMP_DEV_IDLE: + case SCI_DEV_FAILED: + case SCI_DEV_FINAL: + default: + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_DEV_READY: + case SCI_STP_DEV_AWAIT_RESET: + case SCI_DEV_RESETTING: + status = common_complete_io(iport, idev, ireq); + break; + case SCI_STP_DEV_CMD: + case SCI_STP_DEV_NCQ: + case SCI_STP_DEV_NCQ_ERROR: + status = common_complete_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + break; + + if (ireq->sci_status == SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { + /* This request causes hardware error, device needs to be Lun Reset. + * So here we force the state machine to IDLE state so the rest IOs + * can reach RNC state handler, these IOs will be completed by RNC with + * status of "DEVICE_RESET_REQUIRED", instead of "INVALID STATE". + */ + sci_change_state(sm, SCI_STP_DEV_AWAIT_RESET); + } else if (idev->started_request_count == 0) + sci_change_state(sm, SCI_STP_DEV_IDLE); + break; + case SCI_SMP_DEV_CMD: + status = common_complete_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + break; + sci_change_state(sm, SCI_SMP_DEV_IDLE); + break; + case SCI_DEV_STOPPING: + status = common_complete_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + break; + + if (idev->started_request_count == 0) + sci_remote_node_context_destruct(&idev->rnc, + rnc_destruct_done, + idev); + break; + } + + if (status != SCI_SUCCESS) + dev_err(scirdev_to_dev(idev), + "%s: Port:0x%p Device:0x%p Request:0x%p Status:0x%x " + "could not complete\n", __func__, iport, + idev, ireq, status); + else + isci_put_device(idev); + + return status; +} + +static void sci_remote_device_continue_request(void *dev) +{ + struct isci_remote_device *idev = dev; + + /* we need to check if this request is still valid to continue. */ + if (idev->working_request) + sci_controller_continue_io(idev->working_request); +} + +enum sci_status sci_remote_device_start_task(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + struct isci_port *iport = idev->owning_port; + enum sci_status status; + + switch (state) { + case SCI_DEV_INITIAL: + case SCI_DEV_STOPPED: + case SCI_DEV_STARTING: + case SCI_SMP_DEV_IDLE: + case SCI_SMP_DEV_CMD: + case SCI_DEV_STOPPING: + case SCI_DEV_FAILED: + case SCI_DEV_RESETTING: + case SCI_DEV_FINAL: + default: + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_STP_DEV_IDLE: + case SCI_STP_DEV_CMD: + case SCI_STP_DEV_NCQ: + case SCI_STP_DEV_NCQ_ERROR: + case SCI_STP_DEV_AWAIT_RESET: + status = sci_port_start_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + status = sci_remote_node_context_start_task(&idev->rnc, ireq); + if (status != SCI_SUCCESS) + goto out; + + status = sci_request_start(ireq); + if (status != SCI_SUCCESS) + goto out; + + /* Note: If the remote device state is not IDLE this will + * replace the request that probably resulted in the task + * management request. + */ + idev->working_request = ireq; + sci_change_state(sm, SCI_STP_DEV_CMD); + + /* The remote node context must cleanup the TCi to NCQ mapping + * table. The only way to do this correctly is to either write + * to the TLCR register or to invalidate and repost the RNC. In + * either case the remote node context state machine will take + * the correct action when the remote node context is suspended + * and later resumed. + */ + sci_remote_node_context_suspend(&idev->rnc, + SCI_SOFTWARE_SUSPENSION, NULL, NULL); + sci_remote_node_context_resume(&idev->rnc, + sci_remote_device_continue_request, + idev); + + out: + sci_remote_device_start_request(idev, ireq, status); + /* We need to let the controller start request handler know that + * it can't post TC yet. We will provide a callback function to + * post TC when RNC gets resumed. + */ + return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS; + case SCI_DEV_READY: + status = sci_port_start_io(iport, idev, ireq); + if (status != SCI_SUCCESS) + return status; + + status = sci_remote_node_context_start_task(&idev->rnc, ireq); + if (status != SCI_SUCCESS) + break; + + status = sci_request_start(ireq); + break; + } + sci_remote_device_start_request(idev, ireq, status); + + return status; +} + +void sci_remote_device_post_request(struct isci_remote_device *idev, u32 request) +{ + struct isci_port *iport = idev->owning_port; + u32 context; + + context = request | + (ISCI_PEG << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | + (iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | + idev->rnc.remote_node_index; + + sci_controller_post_request(iport->owning_controller, context); +} + +/* called once the remote node context has transisitioned to a + * ready state. This is the indication that the remote device object can also + * transition to ready. + */ +static void remote_device_resume_done(void *_dev) +{ + struct isci_remote_device *idev = _dev; + + if (is_remote_device_ready(idev)) + return; + + /* go 'ready' if we are not already in a ready state */ + sci_change_state(&idev->sm, SCI_DEV_READY); +} + +static void sci_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev) +{ + struct isci_remote_device *idev = _dev; + struct isci_host *ihost = idev->owning_port->owning_controller; + + /* For NCQ operation we do not issue a isci_remote_device_not_ready(). + * As a result, avoid sending the ready notification. + */ + if (idev->sm.previous_state_id != SCI_STP_DEV_NCQ) + isci_remote_device_ready(ihost, idev); +} + +static void sci_remote_device_initial_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + + /* Initial state is a transitional state to the stopped state */ + sci_change_state(&idev->sm, SCI_DEV_STOPPED); +} + +/** + * sci_remote_device_destruct() - free remote node context and destruct + * @remote_device: This parameter specifies the remote device to be destructed. + * + * Remote device objects are a limited resource. As such, they must be + * protected. Thus calls to construct and destruct are mutually exclusive and + * non-reentrant. The return value shall indicate if the device was + * successfully destructed or if some failure occurred. enum sci_status This value + * is returned if the device is successfully destructed. + * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied + * device isn't valid (e.g. it's already been destoryed, the handle isn't + * valid, etc.). + */ +static enum sci_status sci_remote_device_destruct(struct isci_remote_device *idev) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + struct isci_host *ihost; + + if (state != SCI_DEV_STOPPED) { + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + ihost = idev->owning_port->owning_controller; + sci_controller_free_remote_node_context(ihost, idev, + idev->rnc.remote_node_index); + idev->rnc.remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX; + sci_change_state(sm, SCI_DEV_FINAL); + + return SCI_SUCCESS; +} + +/** + * isci_remote_device_deconstruct() - This function frees an isci_remote_device. + * @ihost: This parameter specifies the isci host object. + * @idev: This parameter specifies the remote device to be freed. + * + */ +static void isci_remote_device_deconstruct(struct isci_host *ihost, struct isci_remote_device *idev) +{ + dev_dbg(&ihost->pdev->dev, + "%s: isci_device = %p\n", __func__, idev); + + /* There should not be any outstanding io's. All paths to + * here should go through isci_remote_device_nuke_requests. + * If we hit this condition, we will need a way to complete + * io requests in process */ + BUG_ON(!list_empty(&idev->reqs_in_process)); + + sci_remote_device_destruct(idev); + list_del_init(&idev->node); + isci_put_device(idev); +} + +static void sci_remote_device_stopped_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct isci_host *ihost = idev->owning_port->owning_controller; + u32 prev_state; + + /* If we are entering from the stopping state let the SCI User know that + * the stop operation has completed. + */ + prev_state = idev->sm.previous_state_id; + if (prev_state == SCI_DEV_STOPPING) + isci_remote_device_deconstruct(ihost, idev); + + sci_controller_remote_device_stopped(ihost, idev); +} + +static void sci_remote_device_starting_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct isci_host *ihost = idev->owning_port->owning_controller; + + isci_remote_device_not_ready(ihost, idev, + SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED); +} + +static void sci_remote_device_ready_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct isci_host *ihost = idev->owning_port->owning_controller; + struct domain_device *dev = idev->domain_dev; + + if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_SATA)) { + sci_change_state(&idev->sm, SCI_STP_DEV_IDLE); + } else if (dev_is_expander(dev)) { + sci_change_state(&idev->sm, SCI_SMP_DEV_IDLE); + } else + isci_remote_device_ready(ihost, idev); +} + +static void sci_remote_device_ready_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct domain_device *dev = idev->domain_dev; + + if (dev->dev_type == SAS_END_DEV) { + struct isci_host *ihost = idev->owning_port->owning_controller; + + isci_remote_device_not_ready(ihost, idev, + SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED); + } +} + +static void sci_remote_device_resetting_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + + sci_remote_node_context_suspend( + &idev->rnc, SCI_SOFTWARE_SUSPENSION, NULL, NULL); +} + +static void sci_remote_device_resetting_state_exit(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + + sci_remote_node_context_resume(&idev->rnc, NULL, NULL); +} + +static void sci_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + + idev->working_request = NULL; + if (sci_remote_node_context_is_ready(&idev->rnc)) { + /* + * Since the RNC is ready, it's alright to finish completion + * processing (e.g. signal the remote device is ready). */ + sci_stp_remote_device_ready_idle_substate_resume_complete_handler(idev); + } else { + sci_remote_node_context_resume(&idev->rnc, + sci_stp_remote_device_ready_idle_substate_resume_complete_handler, + idev); + } +} + +static void sci_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct isci_host *ihost = idev->owning_port->owning_controller; + + BUG_ON(idev->working_request == NULL); + + isci_remote_device_not_ready(ihost, idev, + SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED); +} + +static void sci_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct isci_host *ihost = idev->owning_port->owning_controller; + + if (idev->not_ready_reason == SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED) + isci_remote_device_not_ready(ihost, idev, + idev->not_ready_reason); +} + +static void sci_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct isci_host *ihost = idev->owning_port->owning_controller; + + isci_remote_device_ready(ihost, idev); +} + +static void sci_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + struct isci_host *ihost = idev->owning_port->owning_controller; + + BUG_ON(idev->working_request == NULL); + + isci_remote_device_not_ready(ihost, idev, + SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED); +} + +static void sci_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine *sm) +{ + struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); + + idev->working_request = NULL; +} + +static const struct sci_base_state sci_remote_device_state_table[] = { + [SCI_DEV_INITIAL] = { + .enter_state = sci_remote_device_initial_state_enter, + }, + [SCI_DEV_STOPPED] = { + .enter_state = sci_remote_device_stopped_state_enter, + }, + [SCI_DEV_STARTING] = { + .enter_state = sci_remote_device_starting_state_enter, + }, + [SCI_DEV_READY] = { + .enter_state = sci_remote_device_ready_state_enter, + .exit_state = sci_remote_device_ready_state_exit + }, + [SCI_STP_DEV_IDLE] = { + .enter_state = sci_stp_remote_device_ready_idle_substate_enter, + }, + [SCI_STP_DEV_CMD] = { + .enter_state = sci_stp_remote_device_ready_cmd_substate_enter, + }, + [SCI_STP_DEV_NCQ] = { }, + [SCI_STP_DEV_NCQ_ERROR] = { + .enter_state = sci_stp_remote_device_ready_ncq_error_substate_enter, + }, + [SCI_STP_DEV_AWAIT_RESET] = { }, + [SCI_SMP_DEV_IDLE] = { + .enter_state = sci_smp_remote_device_ready_idle_substate_enter, + }, + [SCI_SMP_DEV_CMD] = { + .enter_state = sci_smp_remote_device_ready_cmd_substate_enter, + .exit_state = sci_smp_remote_device_ready_cmd_substate_exit, + }, + [SCI_DEV_STOPPING] = { }, + [SCI_DEV_FAILED] = { }, + [SCI_DEV_RESETTING] = { + .enter_state = sci_remote_device_resetting_state_enter, + .exit_state = sci_remote_device_resetting_state_exit + }, + [SCI_DEV_FINAL] = { }, +}; + +/** + * sci_remote_device_construct() - common construction + * @sci_port: SAS/SATA port through which this device is accessed. + * @sci_dev: remote device to construct + * + * This routine just performs benign initialization and does not + * allocate the remote_node_context which is left to + * sci_remote_device_[de]a_construct(). sci_remote_device_destruct() + * frees the remote_node_context(s) for the device. + */ +static void sci_remote_device_construct(struct isci_port *iport, + struct isci_remote_device *idev) +{ + idev->owning_port = iport; + idev->started_request_count = 0; + + sci_init_sm(&idev->sm, sci_remote_device_state_table, SCI_DEV_INITIAL); + + sci_remote_node_context_construct(&idev->rnc, + SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX); +} + +/** + * sci_remote_device_da_construct() - construct direct attached device. + * + * The information (e.g. IAF, Signature FIS, etc.) necessary to build + * the device is known to the SCI Core since it is contained in the + * sci_phy object. Remote node context(s) is/are a global resource + * allocated by this routine, freed by sci_remote_device_destruct(). + * + * Returns: + * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed. + * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to + * sata-only controller instance. + * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted. + */ +static enum sci_status sci_remote_device_da_construct(struct isci_port *iport, + struct isci_remote_device *idev) +{ + enum sci_status status; + struct domain_device *dev = idev->domain_dev; + + sci_remote_device_construct(iport, idev); + + /* + * This information is request to determine how many remote node context + * entries will be needed to store the remote node. + */ + idev->is_direct_attached = true; + status = sci_controller_allocate_remote_node_context(iport->owning_controller, + idev, + &idev->rnc.remote_node_index); + + if (status != SCI_SUCCESS) + return status; + + if (dev->dev_type == SAS_END_DEV || dev->dev_type == SATA_DEV || + (dev->tproto & SAS_PROTOCOL_STP) || dev_is_expander(dev)) + /* pass */; + else + return SCI_FAILURE_UNSUPPORTED_PROTOCOL; + + idev->connection_rate = sci_port_get_max_allowed_speed(iport); + + /* / @todo Should I assign the port width by reading all of the phys on the port? */ + idev->device_port_width = 1; + + return SCI_SUCCESS; +} + +/** + * sci_remote_device_ea_construct() - construct expander attached device + * + * Remote node context(s) is/are a global resource allocated by this + * routine, freed by sci_remote_device_destruct(). + * + * Returns: + * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed. + * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to + * sata-only controller instance. + * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted. + */ +static enum sci_status sci_remote_device_ea_construct(struct isci_port *iport, + struct isci_remote_device *idev) +{ + struct domain_device *dev = idev->domain_dev; + enum sci_status status; + + sci_remote_device_construct(iport, idev); + + status = sci_controller_allocate_remote_node_context(iport->owning_controller, + idev, + &idev->rnc.remote_node_index); + if (status != SCI_SUCCESS) + return status; + + if (dev->dev_type == SAS_END_DEV || dev->dev_type == SATA_DEV || + (dev->tproto & SAS_PROTOCOL_STP) || dev_is_expander(dev)) + /* pass */; + else + return SCI_FAILURE_UNSUPPORTED_PROTOCOL; + + /* + * For SAS-2 the physical link rate is actually a logical link + * rate that incorporates multiplexing. The SCU doesn't + * incorporate multiplexing and for the purposes of the + * connection the logical link rate is that same as the + * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay + * one another, so this code works for both situations. */ + idev->connection_rate = min_t(u16, sci_port_get_max_allowed_speed(iport), + dev->linkrate); + + /* / @todo Should I assign the port width by reading all of the phys on the port? */ + idev->device_port_width = 1; + + return SCI_SUCCESS; +} + +/** + * sci_remote_device_start() - This method will start the supplied remote + * device. This method enables normal IO requests to flow through to the + * remote device. + * @remote_device: This parameter specifies the device to be started. + * @timeout: This parameter specifies the number of milliseconds in which the + * start operation should complete. + * + * An indication of whether the device was successfully started. SCI_SUCCESS + * This value is returned if the device was successfully started. + * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start + * the device when there have been no phys added to it. + */ +static enum sci_status sci_remote_device_start(struct isci_remote_device *idev, + u32 timeout) +{ + struct sci_base_state_machine *sm = &idev->sm; + enum sci_remote_device_states state = sm->current_state_id; + enum sci_status status; + + if (state != SCI_DEV_STOPPED) { + dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + status = sci_remote_node_context_resume(&idev->rnc, + remote_device_resume_done, + idev); + if (status != SCI_SUCCESS) + return status; + + sci_change_state(sm, SCI_DEV_STARTING); + + return SCI_SUCCESS; +} + +static enum sci_status isci_remote_device_construct(struct isci_port *iport, + struct isci_remote_device *idev) +{ + struct isci_host *ihost = iport->isci_host; + struct domain_device *dev = idev->domain_dev; + enum sci_status status; + + if (dev->parent && dev_is_expander(dev->parent)) + status = sci_remote_device_ea_construct(iport, idev); + else + status = sci_remote_device_da_construct(iport, idev); + + if (status != SCI_SUCCESS) { + dev_dbg(&ihost->pdev->dev, "%s: construct failed: %d\n", + __func__, status); + + return status; + } + + /* start the device. */ + status = sci_remote_device_start(idev, ISCI_REMOTE_DEVICE_START_TIMEOUT); + + if (status != SCI_SUCCESS) + dev_warn(&ihost->pdev->dev, "remote device start failed: %d\n", + status); + + return status; +} + +void isci_remote_device_nuke_requests(struct isci_host *ihost, struct isci_remote_device *idev) +{ + DECLARE_COMPLETION_ONSTACK(aborted_task_completion); + + dev_dbg(&ihost->pdev->dev, + "%s: idev = %p\n", __func__, idev); + + /* Cleanup all requests pending for this device. */ + isci_terminate_pending_requests(ihost, idev); + + dev_dbg(&ihost->pdev->dev, + "%s: idev = %p, done\n", __func__, idev); +} + +/** + * This function builds the isci_remote_device when a libsas dev_found message + * is received. + * @isci_host: This parameter specifies the isci host object. + * @port: This parameter specifies the isci_port conected to this device. + * + * pointer to new isci_remote_device. + */ +static struct isci_remote_device * +isci_remote_device_alloc(struct isci_host *ihost, struct isci_port *iport) +{ + struct isci_remote_device *idev; + int i; + + for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { + idev = &ihost->devices[i]; + if (!test_and_set_bit(IDEV_ALLOCATED, &idev->flags)) + break; + } + + if (i >= SCI_MAX_REMOTE_DEVICES) { + dev_warn(&ihost->pdev->dev, "%s: failed\n", __func__); + return NULL; + } + + if (WARN_ONCE(!list_empty(&idev->reqs_in_process), "found requests in process\n")) + return NULL; + + if (WARN_ONCE(!list_empty(&idev->node), "found non-idle remote device\n")) + return NULL; + + return idev; +} + +void isci_remote_device_release(struct kref *kref) +{ + struct isci_remote_device *idev = container_of(kref, typeof(*idev), kref); + struct isci_host *ihost = idev->isci_port->isci_host; + + idev->domain_dev = NULL; + idev->isci_port = NULL; + clear_bit(IDEV_START_PENDING, &idev->flags); + clear_bit(IDEV_STOP_PENDING, &idev->flags); + clear_bit(IDEV_IO_READY, &idev->flags); + clear_bit(IDEV_GONE, &idev->flags); + clear_bit(IDEV_EH, &idev->flags); + smp_mb__before_clear_bit(); + clear_bit(IDEV_ALLOCATED, &idev->flags); + wake_up(&ihost->eventq); +} + +/** + * isci_remote_device_stop() - This function is called internally to stop the + * remote device. + * @isci_host: This parameter specifies the isci host object. + * @isci_device: This parameter specifies the remote device. + * + * The status of the ihost request to stop. + */ +enum sci_status isci_remote_device_stop(struct isci_host *ihost, struct isci_remote_device *idev) +{ + enum sci_status status; + unsigned long flags; + + dev_dbg(&ihost->pdev->dev, + "%s: isci_device = %p\n", __func__, idev); + + spin_lock_irqsave(&ihost->scic_lock, flags); + idev->domain_dev->lldd_dev = NULL; /* disable new lookups */ + set_bit(IDEV_GONE, &idev->flags); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + /* Kill all outstanding requests. */ + isci_remote_device_nuke_requests(ihost, idev); + + set_bit(IDEV_STOP_PENDING, &idev->flags); + + spin_lock_irqsave(&ihost->scic_lock, flags); + status = sci_remote_device_stop(idev, 50); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + /* Wait for the stop complete callback. */ + if (WARN_ONCE(status != SCI_SUCCESS, "failed to stop device\n")) + /* nothing to wait for */; + else + wait_for_device_stop(ihost, idev); + + return status; +} + +/** + * isci_remote_device_gone() - This function is called by libsas when a domain + * device is removed. + * @domain_device: This parameter specifies the libsas domain device. + * + */ +void isci_remote_device_gone(struct domain_device *dev) +{ + struct isci_host *ihost = dev_to_ihost(dev); + struct isci_remote_device *idev = dev->lldd_dev; + + dev_dbg(&ihost->pdev->dev, + "%s: domain_device = %p, isci_device = %p, isci_port = %p\n", + __func__, dev, idev, idev->isci_port); + + isci_remote_device_stop(ihost, idev); +} + + +/** + * isci_remote_device_found() - This function is called by libsas when a remote + * device is discovered. A remote device object is created and started. the + * function then sleeps until the sci core device started message is + * received. + * @domain_device: This parameter specifies the libsas domain device. + * + * status, zero indicates success. + */ +int isci_remote_device_found(struct domain_device *domain_dev) +{ + struct isci_host *isci_host = dev_to_ihost(domain_dev); + struct isci_port *isci_port; + struct isci_phy *isci_phy; + struct asd_sas_port *sas_port; + struct asd_sas_phy *sas_phy; + struct isci_remote_device *isci_device; + enum sci_status status; + + dev_dbg(&isci_host->pdev->dev, + "%s: domain_device = %p\n", __func__, domain_dev); + + wait_for_start(isci_host); + + sas_port = domain_dev->port; + sas_phy = list_first_entry(&sas_port->phy_list, struct asd_sas_phy, + port_phy_el); + isci_phy = to_iphy(sas_phy); + isci_port = isci_phy->isci_port; + + /* we are being called for a device on this port, + * so it has to come up eventually + */ + wait_for_completion(&isci_port->start_complete); + + if ((isci_stopping == isci_port_get_state(isci_port)) || + (isci_stopped == isci_port_get_state(isci_port))) + return -ENODEV; + + isci_device = isci_remote_device_alloc(isci_host, isci_port); + if (!isci_device) + return -ENODEV; + + kref_init(&isci_device->kref); + INIT_LIST_HEAD(&isci_device->node); + + spin_lock_irq(&isci_host->scic_lock); + isci_device->domain_dev = domain_dev; + isci_device->isci_port = isci_port; + list_add_tail(&isci_device->node, &isci_port->remote_dev_list); + + set_bit(IDEV_START_PENDING, &isci_device->flags); + status = isci_remote_device_construct(isci_port, isci_device); + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_device = %p\n", + __func__, isci_device); + + if (status == SCI_SUCCESS) { + /* device came up, advertise it to the world */ + domain_dev->lldd_dev = isci_device; + } else + isci_put_device(isci_device); + spin_unlock_irq(&isci_host->scic_lock); + + /* wait for the device ready callback. */ + wait_for_device_start(isci_host, isci_device); + + return status == SCI_SUCCESS ? 0 : -ENODEV; +} +/** + * isci_device_is_reset_pending() - This function will check if there is any + * pending reset condition on the device. + * @request: This parameter is the isci_device object. + * + * true if there is a reset pending for the device. + */ +bool isci_device_is_reset_pending( + struct isci_host *isci_host, + struct isci_remote_device *isci_device) +{ + struct isci_request *isci_request; + struct isci_request *tmp_req; + bool reset_is_pending = false; + unsigned long flags; + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_device = %p\n", __func__, isci_device); + + spin_lock_irqsave(&isci_host->scic_lock, flags); + + /* Check for reset on all pending requests. */ + list_for_each_entry_safe(isci_request, tmp_req, + &isci_device->reqs_in_process, dev_node) { + dev_dbg(&isci_host->pdev->dev, + "%s: isci_device = %p request = %p\n", + __func__, isci_device, isci_request); + + if (isci_request->ttype == io_task) { + struct sas_task *task = isci_request_access_task( + isci_request); + + spin_lock(&task->task_state_lock); + if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) + reset_is_pending = true; + spin_unlock(&task->task_state_lock); + } + } + + spin_unlock_irqrestore(&isci_host->scic_lock, flags); + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_device = %p reset_is_pending = %d\n", + __func__, isci_device, reset_is_pending); + + return reset_is_pending; +} + +/** + * isci_device_clear_reset_pending() - This function will clear if any pending + * reset condition flags on the device. + * @request: This parameter is the isci_device object. + * + * true if there is a reset pending for the device. + */ +void isci_device_clear_reset_pending(struct isci_host *ihost, struct isci_remote_device *idev) +{ + struct isci_request *isci_request; + struct isci_request *tmp_req; + unsigned long flags = 0; + + dev_dbg(&ihost->pdev->dev, "%s: idev=%p, ihost=%p\n", + __func__, idev, ihost); + + spin_lock_irqsave(&ihost->scic_lock, flags); + + /* Clear reset pending on all pending requests. */ + list_for_each_entry_safe(isci_request, tmp_req, + &idev->reqs_in_process, dev_node) { + dev_dbg(&ihost->pdev->dev, "%s: idev = %p request = %p\n", + __func__, idev, isci_request); + + if (isci_request->ttype == io_task) { + + unsigned long flags2; + struct sas_task *task = isci_request_access_task( + isci_request); + + spin_lock_irqsave(&task->task_state_lock, flags2); + task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET; + spin_unlock_irqrestore(&task->task_state_lock, flags2); + } + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h new file mode 100644 index 000000000000..57ccfc3d6ad3 --- /dev/null +++ b/drivers/scsi/isci/remote_device.h @@ -0,0 +1,352 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _ISCI_REMOTE_DEVICE_H_ +#define _ISCI_REMOTE_DEVICE_H_ +#include <scsi/libsas.h> +#include <linux/kref.h> +#include "scu_remote_node_context.h" +#include "remote_node_context.h" +#include "port.h" + +enum sci_remote_device_not_ready_reason_code { + SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED, + SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED, + SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED, + SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED, + SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED, + SCIC_REMOTE_DEVICE_NOT_READY_REASON_CODE_MAX +}; + +/** + * isci_remote_device - isci representation of a sas expander / end point + * @device_port_width: hw setting for number of simultaneous connections + * @connection_rate: per-taskcontext connection rate for this device + * @working_request: SATA requests have no tag we for unaccelerated + * protocols we need a method to associate unsolicited + * frames with a pending request + */ +struct isci_remote_device { + #define IDEV_START_PENDING 0 + #define IDEV_STOP_PENDING 1 + #define IDEV_ALLOCATED 2 + #define IDEV_EH 3 + #define IDEV_GONE 4 + #define IDEV_IO_READY 5 + #define IDEV_IO_NCQERROR 6 + unsigned long flags; + struct kref kref; + struct isci_port *isci_port; + struct domain_device *domain_dev; + struct list_head node; + struct list_head reqs_in_process; + struct sci_base_state_machine sm; + u32 device_port_width; + enum sas_linkrate connection_rate; + bool is_direct_attached; + struct isci_port *owning_port; + struct sci_remote_node_context rnc; + /* XXX unify with device reference counting and delete */ + u32 started_request_count; + struct isci_request *working_request; + u32 not_ready_reason; +}; + +#define ISCI_REMOTE_DEVICE_START_TIMEOUT 5000 + +/* device reference routines must be called under sci_lock */ +static inline struct isci_remote_device *isci_lookup_device(struct domain_device *dev) +{ + struct isci_remote_device *idev = dev->lldd_dev; + + if (idev && !test_bit(IDEV_GONE, &idev->flags)) { + kref_get(&idev->kref); + return idev; + } + + return NULL; +} + +void isci_remote_device_release(struct kref *kref); +static inline void isci_put_device(struct isci_remote_device *idev) +{ + if (idev) + kref_put(&idev->kref, isci_remote_device_release); +} + +enum sci_status isci_remote_device_stop(struct isci_host *ihost, + struct isci_remote_device *idev); +void isci_remote_device_nuke_requests(struct isci_host *ihost, + struct isci_remote_device *idev); +void isci_remote_device_gone(struct domain_device *domain_dev); +int isci_remote_device_found(struct domain_device *domain_dev); +bool isci_device_is_reset_pending(struct isci_host *ihost, + struct isci_remote_device *idev); +void isci_device_clear_reset_pending(struct isci_host *ihost, + struct isci_remote_device *idev); +/** + * sci_remote_device_stop() - This method will stop both transmission and + * reception of link activity for the supplied remote device. This method + * disables normal IO requests from flowing through to the remote device. + * @remote_device: This parameter specifies the device to be stopped. + * @timeout: This parameter specifies the number of milliseconds in which the + * stop operation should complete. + * + * An indication of whether the device was successfully stopped. SCI_SUCCESS + * This value is returned if the transmission and reception for the device was + * successfully stopped. + */ +enum sci_status sci_remote_device_stop( + struct isci_remote_device *idev, + u32 timeout); + +/** + * sci_remote_device_reset() - This method will reset the device making it + * ready for operation. This method must be called anytime the device is + * reset either through a SMP phy control or a port hard reset request. + * @remote_device: This parameter specifies the device to be reset. + * + * This method does not actually cause the device hardware to be reset. This + * method resets the software object so that it will be operational after a + * device hardware reset completes. An indication of whether the device reset + * was accepted. SCI_SUCCESS This value is returned if the device reset is + * started. + */ +enum sci_status sci_remote_device_reset( + struct isci_remote_device *idev); + +/** + * sci_remote_device_reset_complete() - This method informs the device object + * that the reset operation is complete and the device can resume operation + * again. + * @remote_device: This parameter specifies the device which is to be informed + * of the reset complete operation. + * + * An indication that the device is resuming operation. SCI_SUCCESS the device + * is resuming operation. + */ +enum sci_status sci_remote_device_reset_complete( + struct isci_remote_device *idev); + +/** + * enum sci_remote_device_states - This enumeration depicts all the states + * for the common remote device state machine. + * + * + */ +enum sci_remote_device_states { + /** + * Simply the initial state for the base remote device state machine. + */ + SCI_DEV_INITIAL, + + /** + * This state indicates that the remote device has successfully been + * stopped. In this state no new IO operations are permitted. + * This state is entered from the INITIAL state. + * This state is entered from the STOPPING state. + */ + SCI_DEV_STOPPED, + + /** + * This state indicates the the remote device is in the process of + * becoming ready (i.e. starting). In this state no new IO operations + * are permitted. + * This state is entered from the STOPPED state. + */ + SCI_DEV_STARTING, + + /** + * This state indicates the remote device is now ready. Thus, the user + * is able to perform IO operations on the remote device. + * This state is entered from the STARTING state. + */ + SCI_DEV_READY, + + /** + * This is the idle substate for the stp remote device. When there are no + * active IO for the device it is is in this state. + */ + SCI_STP_DEV_IDLE, + + /** + * This is the command state for for the STP remote device. This state is + * entered when the device is processing a non-NCQ command. The device object + * will fail any new start IO requests until this command is complete. + */ + SCI_STP_DEV_CMD, + + /** + * This is the NCQ state for the STP remote device. This state is entered + * when the device is processing an NCQ reuqest. It will remain in this state + * so long as there is one or more NCQ requests being processed. + */ + SCI_STP_DEV_NCQ, + + /** + * This is the NCQ error state for the STP remote device. This state is + * entered when an SDB error FIS is received by the device object while in the + * NCQ state. The device object will only accept a READ LOG command while in + * this state. + */ + SCI_STP_DEV_NCQ_ERROR, + + /** + * This is the READY substate indicates the device is waiting for the RESET task + * coming to be recovered from certain hardware specific error. + */ + SCI_STP_DEV_AWAIT_RESET, + + /** + * This is the ready operational substate for the remote device. This is the + * normal operational state for a remote device. + */ + SCI_SMP_DEV_IDLE, + + /** + * This is the suspended state for the remote device. This is the state that + * the device is placed in when a RNC suspend is received by the SCU hardware. + */ + SCI_SMP_DEV_CMD, + + /** + * This state indicates that the remote device is in the process of + * stopping. In this state no new IO operations are permitted, but + * existing IO operations are allowed to complete. + * This state is entered from the READY state. + * This state is entered from the FAILED state. + */ + SCI_DEV_STOPPING, + + /** + * This state indicates that the remote device has failed. + * In this state no new IO operations are permitted. + * This state is entered from the INITIALIZING state. + * This state is entered from the READY state. + */ + SCI_DEV_FAILED, + + /** + * This state indicates the device is being reset. + * In this state no new IO operations are permitted. + * This state is entered from the READY state. + */ + SCI_DEV_RESETTING, + + /** + * Simply the final state for the base remote device state machine. + */ + SCI_DEV_FINAL, +}; + +static inline struct isci_remote_device *rnc_to_dev(struct sci_remote_node_context *rnc) +{ + struct isci_remote_device *idev; + + idev = container_of(rnc, typeof(*idev), rnc); + + return idev; +} + +static inline bool dev_is_expander(struct domain_device *dev) +{ + return dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV; +} + +static inline void sci_remote_device_decrement_request_count(struct isci_remote_device *idev) +{ + /* XXX delete this voodoo when converting to the top-level device + * reference count + */ + if (WARN_ONCE(idev->started_request_count == 0, + "%s: tried to decrement started_request_count past 0!?", + __func__)) + /* pass */; + else + idev->started_request_count--; +} + +enum sci_status sci_remote_device_frame_handler( + struct isci_remote_device *idev, + u32 frame_index); + +enum sci_status sci_remote_device_event_handler( + struct isci_remote_device *idev, + u32 event_code); + +enum sci_status sci_remote_device_start_io( + struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sci_status sci_remote_device_start_task( + struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sci_status sci_remote_device_complete_io( + struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq); + +enum sci_status sci_remote_device_suspend( + struct isci_remote_device *idev, + u32 suspend_type); + +void sci_remote_device_post_request( + struct isci_remote_device *idev, + u32 request); + +#endif /* !defined(_ISCI_REMOTE_DEVICE_H_) */ diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c new file mode 100644 index 000000000000..748e8339d1ec --- /dev/null +++ b/drivers/scsi/isci/remote_node_context.c @@ -0,0 +1,627 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "host.h" +#include "isci.h" +#include "remote_device.h" +#include "remote_node_context.h" +#include "scu_event_codes.h" +#include "scu_task_context.h" + + +/** + * + * @sci_rnc: The RNC for which the is posted request is being made. + * + * This method will return true if the RNC is not in the initial state. In all + * other states the RNC is considered active and this will return true. The + * destroy request of the state machine drives the RNC back to the initial + * state. If the state machine changes then this routine will also have to be + * changed. bool true if the state machine is not in the initial state false if + * the state machine is in the initial state + */ + +/** + * + * @sci_rnc: The state of the remote node context object to check. + * + * This method will return true if the remote node context is in a READY state + * otherwise it will return false bool true if the remote node context is in + * the ready state. false if the remote node context is not in the ready state. + */ +bool sci_remote_node_context_is_ready( + struct sci_remote_node_context *sci_rnc) +{ + u32 current_state = sci_rnc->sm.current_state_id; + + if (current_state == SCI_RNC_READY) { + return true; + } + + return false; +} + +static union scu_remote_node_context *sci_rnc_by_id(struct isci_host *ihost, u16 id) +{ + if (id < ihost->remote_node_entries && + ihost->device_table[id]) + return &ihost->remote_node_context_table[id]; + + return NULL; +} + +static void sci_remote_node_context_construct_buffer(struct sci_remote_node_context *sci_rnc) +{ + struct isci_remote_device *idev = rnc_to_dev(sci_rnc); + struct domain_device *dev = idev->domain_dev; + int rni = sci_rnc->remote_node_index; + union scu_remote_node_context *rnc; + struct isci_host *ihost; + __le64 sas_addr; + + ihost = idev->owning_port->owning_controller; + rnc = sci_rnc_by_id(ihost, rni); + + memset(rnc, 0, sizeof(union scu_remote_node_context) + * sci_remote_device_node_count(idev)); + + rnc->ssp.remote_node_index = rni; + rnc->ssp.remote_node_port_width = idev->device_port_width; + rnc->ssp.logical_port_index = idev->owning_port->physical_port_index; + + /* sas address is __be64, context ram format is __le64 */ + sas_addr = cpu_to_le64(SAS_ADDR(dev->sas_addr)); + rnc->ssp.remote_sas_address_hi = upper_32_bits(sas_addr); + rnc->ssp.remote_sas_address_lo = lower_32_bits(sas_addr); + + rnc->ssp.nexus_loss_timer_enable = true; + rnc->ssp.check_bit = false; + rnc->ssp.is_valid = false; + rnc->ssp.is_remote_node_context = true; + rnc->ssp.function_number = 0; + + rnc->ssp.arbitration_wait_time = 0; + + if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { + rnc->ssp.connection_occupancy_timeout = + ihost->user_parameters.stp_max_occupancy_timeout; + rnc->ssp.connection_inactivity_timeout = + ihost->user_parameters.stp_inactivity_timeout; + } else { + rnc->ssp.connection_occupancy_timeout = + ihost->user_parameters.ssp_max_occupancy_timeout; + rnc->ssp.connection_inactivity_timeout = + ihost->user_parameters.ssp_inactivity_timeout; + } + + rnc->ssp.initial_arbitration_wait_time = 0; + + /* Open Address Frame Parameters */ + rnc->ssp.oaf_connection_rate = idev->connection_rate; + rnc->ssp.oaf_features = 0; + rnc->ssp.oaf_source_zone_group = 0; + rnc->ssp.oaf_more_compatibility_features = 0; +} + +/** + * + * @sci_rnc: + * @callback: + * @callback_parameter: + * + * This method will setup the remote node context object so it will transition + * to its ready state. If the remote node context is already setup to + * transition to its final state then this function does nothing. none + */ +static void sci_remote_node_context_setup_to_resume( + struct sci_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback callback, + void *callback_parameter) +{ + if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL) { + sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY; + sci_rnc->user_callback = callback; + sci_rnc->user_cookie = callback_parameter; + } +} + +static void sci_remote_node_context_setup_to_destory( + struct sci_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback callback, + void *callback_parameter) +{ + sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL; + sci_rnc->user_callback = callback; + sci_rnc->user_cookie = callback_parameter; +} + +/** + * + * + * This method just calls the user callback function and then resets the + * callback. + */ +static void sci_remote_node_context_notify_user( + struct sci_remote_node_context *rnc) +{ + if (rnc->user_callback != NULL) { + (*rnc->user_callback)(rnc->user_cookie); + + rnc->user_callback = NULL; + rnc->user_cookie = NULL; + } +} + +static void sci_remote_node_context_continue_state_transitions(struct sci_remote_node_context *rnc) +{ + if (rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) + sci_remote_node_context_resume(rnc, rnc->user_callback, + rnc->user_cookie); +} + +static void sci_remote_node_context_validate_context_buffer(struct sci_remote_node_context *sci_rnc) +{ + union scu_remote_node_context *rnc_buffer; + struct isci_remote_device *idev = rnc_to_dev(sci_rnc); + struct domain_device *dev = idev->domain_dev; + struct isci_host *ihost = idev->owning_port->owning_controller; + + rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index); + + rnc_buffer->ssp.is_valid = true; + + if (!idev->is_direct_attached && + (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))) { + sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_96); + } else { + sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_32); + + if (idev->is_direct_attached) + sci_port_setup_transports(idev->owning_port, + sci_rnc->remote_node_index); + } +} + +static void sci_remote_node_context_invalidate_context_buffer(struct sci_remote_node_context *sci_rnc) +{ + union scu_remote_node_context *rnc_buffer; + struct isci_remote_device *idev = rnc_to_dev(sci_rnc); + struct isci_host *ihost = idev->owning_port->owning_controller; + + rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index); + + rnc_buffer->ssp.is_valid = false; + + sci_remote_device_post_request(rnc_to_dev(sci_rnc), + SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE); +} + +static void sci_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm) +{ + struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); + + /* Check to see if we have gotten back to the initial state because + * someone requested to destroy the remote node context object. + */ + if (sm->previous_state_id == SCI_RNC_INVALIDATING) { + rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; + sci_remote_node_context_notify_user(rnc); + } +} + +static void sci_remote_node_context_posting_state_enter(struct sci_base_state_machine *sm) +{ + struct sci_remote_node_context *sci_rnc = container_of(sm, typeof(*sci_rnc), sm); + + sci_remote_node_context_validate_context_buffer(sci_rnc); +} + +static void sci_remote_node_context_invalidating_state_enter(struct sci_base_state_machine *sm) +{ + struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); + + sci_remote_node_context_invalidate_context_buffer(rnc); +} + +static void sci_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm) +{ + struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); + struct isci_remote_device *idev; + struct domain_device *dev; + + idev = rnc_to_dev(rnc); + dev = idev->domain_dev; + + /* + * For direct attached SATA devices we need to clear the TLCR + * NCQ to TCi tag mapping on the phy and in cases where we + * resume because of a target reset we also need to update + * the STPTLDARNI register with the RNi of the device + */ + if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) && + idev->is_direct_attached) + sci_port_setup_transports(idev->owning_port, + rnc->remote_node_index); + + sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME); +} + +static void sci_remote_node_context_ready_state_enter(struct sci_base_state_machine *sm) +{ + struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); + + rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; + + if (rnc->user_callback) + sci_remote_node_context_notify_user(rnc); +} + +static void sci_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine *sm) +{ + struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); + + sci_remote_node_context_continue_state_transitions(rnc); +} + +static void sci_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm) +{ + struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); + + sci_remote_node_context_continue_state_transitions(rnc); +} + +static const struct sci_base_state sci_remote_node_context_state_table[] = { + [SCI_RNC_INITIAL] = { + .enter_state = sci_remote_node_context_initial_state_enter, + }, + [SCI_RNC_POSTING] = { + .enter_state = sci_remote_node_context_posting_state_enter, + }, + [SCI_RNC_INVALIDATING] = { + .enter_state = sci_remote_node_context_invalidating_state_enter, + }, + [SCI_RNC_RESUMING] = { + .enter_state = sci_remote_node_context_resuming_state_enter, + }, + [SCI_RNC_READY] = { + .enter_state = sci_remote_node_context_ready_state_enter, + }, + [SCI_RNC_TX_SUSPENDED] = { + .enter_state = sci_remote_node_context_tx_suspended_state_enter, + }, + [SCI_RNC_TX_RX_SUSPENDED] = { + .enter_state = sci_remote_node_context_tx_rx_suspended_state_enter, + }, + [SCI_RNC_AWAIT_SUSPENSION] = { }, +}; + +void sci_remote_node_context_construct(struct sci_remote_node_context *rnc, + u16 remote_node_index) +{ + memset(rnc, 0, sizeof(struct sci_remote_node_context)); + + rnc->remote_node_index = remote_node_index; + rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; + + sci_init_sm(&rnc->sm, sci_remote_node_context_state_table, SCI_RNC_INITIAL); +} + +enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc, + u32 event_code) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->sm.current_state_id; + switch (state) { + case SCI_RNC_POSTING: + switch (scu_get_event_code(event_code)) { + case SCU_EVENT_POST_RNC_COMPLETE: + sci_change_state(&sci_rnc->sm, SCI_RNC_READY); + break; + default: + goto out; + } + break; + case SCI_RNC_INVALIDATING: + if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) { + if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL) + state = SCI_RNC_INITIAL; + else + state = SCI_RNC_POSTING; + sci_change_state(&sci_rnc->sm, state); + } else { + switch (scu_get_event_type(event_code)) { + case SCU_EVENT_TYPE_RNC_SUSPEND_TX: + case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: + /* We really dont care if the hardware is going to suspend + * the device since it's being invalidated anyway */ + dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: SCIC Remote Node Context 0x%p was " + "suspeneded by hardware while being " + "invalidated.\n", __func__, sci_rnc); + break; + default: + goto out; + } + } + break; + case SCI_RNC_RESUMING: + if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) { + sci_change_state(&sci_rnc->sm, SCI_RNC_READY); + } else { + switch (scu_get_event_type(event_code)) { + case SCU_EVENT_TYPE_RNC_SUSPEND_TX: + case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: + /* We really dont care if the hardware is going to suspend + * the device since it's being resumed anyway */ + dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: SCIC Remote Node Context 0x%p was " + "suspeneded by hardware while being resumed.\n", + __func__, sci_rnc); + break; + default: + goto out; + } + } + break; + case SCI_RNC_READY: + switch (scu_get_event_type(event_code)) { + case SCU_EVENT_TL_RNC_SUSPEND_TX: + sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED); + sci_rnc->suspension_code = scu_get_event_specifier(event_code); + break; + case SCU_EVENT_TL_RNC_SUSPEND_TX_RX: + sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED); + sci_rnc->suspension_code = scu_get_event_specifier(event_code); + break; + default: + goto out; + } + break; + case SCI_RNC_AWAIT_SUSPENSION: + switch (scu_get_event_type(event_code)) { + case SCU_EVENT_TL_RNC_SUSPEND_TX: + sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED); + sci_rnc->suspension_code = scu_get_event_specifier(event_code); + break; + case SCU_EVENT_TL_RNC_SUSPEND_TX_RX: + sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED); + sci_rnc->suspension_code = scu_get_event_specifier(event_code); + break; + default: + goto out; + } + break; + default: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + return SCI_SUCCESS; + + out: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: code: %#x state: %d\n", __func__, event_code, state); + return SCI_FAILURE; + +} + +enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->sm.current_state_id; + switch (state) { + case SCI_RNC_INVALIDATING: + sci_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p); + return SCI_SUCCESS; + case SCI_RNC_POSTING: + case SCI_RNC_RESUMING: + case SCI_RNC_READY: + case SCI_RNC_TX_SUSPENDED: + case SCI_RNC_TX_RX_SUSPENDED: + case SCI_RNC_AWAIT_SUSPENSION: + sci_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p); + sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING); + return SCI_SUCCESS; + case SCI_RNC_INITIAL: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + /* We have decided that the destruct request on the remote node context + * can not fail since it is either in the initial/destroyed state or is + * can be destroyed. + */ + return SCI_SUCCESS; + default: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status sci_remote_node_context_suspend(struct sci_remote_node_context *sci_rnc, + u32 suspend_type, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->sm.current_state_id; + if (state != SCI_RNC_READY) { + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + sci_rnc->user_callback = cb_fn; + sci_rnc->user_cookie = cb_p; + sci_rnc->suspension_code = suspend_type; + + if (suspend_type == SCI_SOFTWARE_SUSPENSION) { + sci_remote_device_post_request(rnc_to_dev(sci_rnc), + SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX); + } + + sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION); + return SCI_SUCCESS; +} + +enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->sm.current_state_id; + switch (state) { + case SCI_RNC_INITIAL: + if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) + return SCI_FAILURE_INVALID_STATE; + + sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + sci_remote_node_context_construct_buffer(sci_rnc); + sci_change_state(&sci_rnc->sm, SCI_RNC_POSTING); + return SCI_SUCCESS; + case SCI_RNC_POSTING: + case SCI_RNC_INVALIDATING: + case SCI_RNC_RESUMING: + if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) + return SCI_FAILURE_INVALID_STATE; + + sci_rnc->user_callback = cb_fn; + sci_rnc->user_cookie = cb_p; + return SCI_SUCCESS; + case SCI_RNC_TX_SUSPENDED: { + struct isci_remote_device *idev = rnc_to_dev(sci_rnc); + struct domain_device *dev = idev->domain_dev; + + sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + + /* TODO: consider adding a resume action of NONE, INVALIDATE, WRITE_TLCR */ + if (dev->dev_type == SAS_END_DEV || dev_is_expander(dev)) + sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING); + else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { + if (idev->is_direct_attached) { + /* @todo Fix this since I am being silly in writing to the STPTLDARNI register. */ + sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING); + } else { + sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING); + } + } else + return SCI_FAILURE; + return SCI_SUCCESS; + } + case SCI_RNC_TX_RX_SUSPENDED: + sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING); + return SCI_FAILURE_INVALID_STATE; + case SCI_RNC_AWAIT_SUSPENSION: + sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); + return SCI_SUCCESS; + default: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} + +enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc, + struct isci_request *ireq) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->sm.current_state_id; + + switch (state) { + case SCI_RNC_READY: + return SCI_SUCCESS; + case SCI_RNC_TX_SUSPENDED: + case SCI_RNC_TX_RX_SUSPENDED: + case SCI_RNC_AWAIT_SUSPENSION: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; + default: + break; + } + dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: requested to start IO while still resuming, %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; +} + +enum sci_status sci_remote_node_context_start_task(struct sci_remote_node_context *sci_rnc, + struct isci_request *ireq) +{ + enum scis_sds_remote_node_context_states state; + + state = sci_rnc->sm.current_state_id; + switch (state) { + case SCI_RNC_RESUMING: + case SCI_RNC_READY: + case SCI_RNC_AWAIT_SUSPENSION: + return SCI_SUCCESS; + case SCI_RNC_TX_SUSPENDED: + case SCI_RNC_TX_RX_SUSPENDED: + sci_remote_node_context_resume(sci_rnc, NULL, NULL); + return SCI_SUCCESS; + default: + dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), + "%s: invalid state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } +} diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h new file mode 100644 index 000000000000..41580ad12520 --- /dev/null +++ b/drivers/scsi/isci/remote_node_context.h @@ -0,0 +1,224 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ +#define _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ + +/** + * This file contains the structures, constants, and prototypes associated with + * the remote node context in the silicon. It exists to model and manage + * the remote node context in the silicon. + * + * + */ + +#include "isci.h" + +/** + * + * + * This constant represents an invalid remote device id, it is used to program + * the STPDARNI register so the driver knows when it has received a SIGNATURE + * FIS from the SCU. + */ +#define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF + +#define SCU_HARDWARE_SUSPENSION (0) +#define SCI_SOFTWARE_SUSPENSION (1) + +struct isci_request; +struct isci_remote_device; +struct sci_remote_node_context; + +typedef void (*scics_sds_remote_node_context_callback)(void *); + +/** + * This is the enumeration of the remote node context states. + */ +enum scis_sds_remote_node_context_states { + /** + * This state is the initial state for a remote node context. On a resume + * request the remote node context will transition to the posting state. + */ + SCI_RNC_INITIAL, + + /** + * This is a transition state that posts the RNi to the hardware. Once the RNC + * is posted the remote node context will be made ready. + */ + SCI_RNC_POSTING, + + /** + * This is a transition state that will post an RNC invalidate to the + * hardware. Once the invalidate is complete the remote node context will + * transition to the posting state. + */ + SCI_RNC_INVALIDATING, + + /** + * This is a transition state that will post an RNC resume to the hardare. + * Once the event notification of resume complete is received the remote node + * context will transition to the ready state. + */ + SCI_RNC_RESUMING, + + /** + * This is the state that the remote node context must be in to accept io + * request operations. + */ + SCI_RNC_READY, + + /** + * This is the state that the remote node context transitions to when it gets + * a TX suspend notification from the hardware. + */ + SCI_RNC_TX_SUSPENDED, + + /** + * This is the state that the remote node context transitions to when it gets + * a TX RX suspend notification from the hardware. + */ + SCI_RNC_TX_RX_SUSPENDED, + + /** + * This state is a wait state for the remote node context that waits for a + * suspend notification from the hardware. This state is entered when either + * there is a request to supend the remote node context or when there is a TC + * completion where the remote node will be suspended by the hardware. + */ + SCI_RNC_AWAIT_SUSPENSION +}; + +/** + * + * + * This enumeration is used to define the end destination state for the remote + * node context. + */ +enum sci_remote_node_context_destination_state { + SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED, + SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY, + SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL +}; + +/** + * struct sci_remote_node_context - This structure contains the data + * associated with the remote node context object. The remote node context + * (RNC) object models the the remote device information necessary to manage + * the silicon RNC. + */ +struct sci_remote_node_context { + /** + * This field indicates the remote node index (RNI) associated with + * this RNC. + */ + u16 remote_node_index; + + /** + * This field is the recored suspension code or the reason for the remote node + * context suspension. + */ + u32 suspension_code; + + /** + * This field is true if the remote node context is resuming from its current + * state. This can cause an automatic resume on receiving a suspension + * notification. + */ + enum sci_remote_node_context_destination_state destination_state; + + /** + * This field contains the callback function that the user requested to be + * called when the requested state transition is complete. + */ + scics_sds_remote_node_context_callback user_callback; + + /** + * This field contains the parameter that is called when the user requested + * state transition is completed. + */ + void *user_cookie; + + /** + * This field contains the data for the object's state machine. + */ + struct sci_base_state_machine sm; +}; + +void sci_remote_node_context_construct(struct sci_remote_node_context *rnc, + u16 remote_node_index); + + +bool sci_remote_node_context_is_ready( + struct sci_remote_node_context *sci_rnc); + +enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc, + u32 event_code); +enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback callback, + void *callback_parameter); +enum sci_status sci_remote_node_context_suspend(struct sci_remote_node_context *sci_rnc, + u32 suspend_type, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p); +enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p); +enum sci_status sci_remote_node_context_start_task(struct sci_remote_node_context *sci_rnc, + struct isci_request *ireq); +enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc, + struct isci_request *ireq); + +#endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */ diff --git a/drivers/scsi/isci/remote_node_table.c b/drivers/scsi/isci/remote_node_table.c new file mode 100644 index 000000000000..301b3141945e --- /dev/null +++ b/drivers/scsi/isci/remote_node_table.c @@ -0,0 +1,598 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * This file contains the implementation of the SCIC_SDS_REMOTE_NODE_TABLE + * public, protected, and private methods. + * + * + */ +#include "remote_node_table.h" +#include "remote_node_context.h" + +/** + * + * @remote_node_table: This is the remote node index table from which the + * selection will be made. + * @group_table_index: This is the index to the group table from which to + * search for an available selection. + * + * This routine will find the bit position in absolute bit terms of the next 32 + * + bit position. If there are available bits in the first u32 then it is + * just bit position. u32 This is the absolute bit position for an available + * group. + */ +static u32 sci_remote_node_table_get_group_index( + struct sci_remote_node_table *remote_node_table, + u32 group_table_index) +{ + u32 dword_index; + u32 *group_table; + u32 bit_index; + + group_table = remote_node_table->remote_node_groups[group_table_index]; + + for (dword_index = 0; dword_index < remote_node_table->group_array_size; dword_index++) { + if (group_table[dword_index] != 0) { + for (bit_index = 0; bit_index < 32; bit_index++) { + if ((group_table[dword_index] & (1 << bit_index)) != 0) { + return (dword_index * 32) + bit_index; + } + } + } + } + + return SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX; +} + +/** + * + * @out]: remote_node_table This the remote node table in which to clear the + * selector. + * @set_index: This is the remote node selector in which the change will be + * made. + * @group_index: This is the bit index in the table to be modified. + * + * This method will clear the group index entry in the specified group index + * table. none + */ +static void sci_remote_node_table_clear_group_index( + struct sci_remote_node_table *remote_node_table, + u32 group_table_index, + u32 group_index) +{ + u32 dword_index; + u32 bit_index; + u32 *group_table; + + BUG_ON(group_table_index >= SCU_STP_REMOTE_NODE_COUNT); + BUG_ON(group_index >= (u32)(remote_node_table->group_array_size * 32)); + + dword_index = group_index / 32; + bit_index = group_index % 32; + group_table = remote_node_table->remote_node_groups[group_table_index]; + + group_table[dword_index] = group_table[dword_index] & ~(1 << bit_index); +} + +/** + * + * @out]: remote_node_table This the remote node table in which to set the + * selector. + * @group_table_index: This is the remote node selector in which the change + * will be made. + * @group_index: This is the bit position in the table to be modified. + * + * This method will set the group index bit entry in the specified gropu index + * table. none + */ +static void sci_remote_node_table_set_group_index( + struct sci_remote_node_table *remote_node_table, + u32 group_table_index, + u32 group_index) +{ + u32 dword_index; + u32 bit_index; + u32 *group_table; + + BUG_ON(group_table_index >= SCU_STP_REMOTE_NODE_COUNT); + BUG_ON(group_index >= (u32)(remote_node_table->group_array_size * 32)); + + dword_index = group_index / 32; + bit_index = group_index % 32; + group_table = remote_node_table->remote_node_groups[group_table_index]; + + group_table[dword_index] = group_table[dword_index] | (1 << bit_index); +} + +/** + * + * @out]: remote_node_table This is the remote node table in which to modify + * the remote node availability. + * @remote_node_index: This is the remote node index that is being returned to + * the table. + * + * This method will set the remote to available in the remote node allocation + * table. none + */ +static void sci_remote_node_table_set_node_index( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_index) +{ + u32 dword_location; + u32 dword_remainder; + u32 slot_normalized; + u32 slot_position; + + BUG_ON( + (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD) + <= (remote_node_index / SCU_STP_REMOTE_NODE_COUNT) + ); + + dword_location = remote_node_index / SCIC_SDS_REMOTE_NODES_PER_DWORD; + dword_remainder = remote_node_index % SCIC_SDS_REMOTE_NODES_PER_DWORD; + slot_normalized = (dword_remainder / SCU_STP_REMOTE_NODE_COUNT) * sizeof(u32); + slot_position = remote_node_index % SCU_STP_REMOTE_NODE_COUNT; + + remote_node_table->available_remote_nodes[dword_location] |= + 1 << (slot_normalized + slot_position); +} + +/** + * + * @out]: remote_node_table This is the remote node table from which to clear + * the available remote node bit. + * @remote_node_index: This is the remote node index which is to be cleared + * from the table. + * + * This method clears the remote node index from the table of available remote + * nodes. none + */ +static void sci_remote_node_table_clear_node_index( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_index) +{ + u32 dword_location; + u32 dword_remainder; + u32 slot_position; + u32 slot_normalized; + + BUG_ON( + (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD) + <= (remote_node_index / SCU_STP_REMOTE_NODE_COUNT) + ); + + dword_location = remote_node_index / SCIC_SDS_REMOTE_NODES_PER_DWORD; + dword_remainder = remote_node_index % SCIC_SDS_REMOTE_NODES_PER_DWORD; + slot_normalized = (dword_remainder / SCU_STP_REMOTE_NODE_COUNT) * sizeof(u32); + slot_position = remote_node_index % SCU_STP_REMOTE_NODE_COUNT; + + remote_node_table->available_remote_nodes[dword_location] &= + ~(1 << (slot_normalized + slot_position)); +} + +/** + * + * @out]: remote_node_table The remote node table from which the slot will be + * cleared. + * @group_index: The index for the slot that is to be cleared. + * + * This method clears the entire table slot at the specified slot index. none + */ +static void sci_remote_node_table_clear_group( + struct sci_remote_node_table *remote_node_table, + u32 group_index) +{ + u32 dword_location; + u32 dword_remainder; + u32 dword_value; + + BUG_ON( + (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD) + <= (group_index / SCU_STP_REMOTE_NODE_COUNT) + ); + + dword_location = group_index / SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD; + dword_remainder = group_index % SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD; + + dword_value = remote_node_table->available_remote_nodes[dword_location]; + dword_value &= ~(SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE << (dword_remainder * 4)); + remote_node_table->available_remote_nodes[dword_location] = dword_value; +} + +/** + * + * @remote_node_table: + * + * THis method sets an entire remote node group in the remote node table. + */ +static void sci_remote_node_table_set_group( + struct sci_remote_node_table *remote_node_table, + u32 group_index) +{ + u32 dword_location; + u32 dword_remainder; + u32 dword_value; + + BUG_ON( + (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD) + <= (group_index / SCU_STP_REMOTE_NODE_COUNT) + ); + + dword_location = group_index / SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD; + dword_remainder = group_index % SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD; + + dword_value = remote_node_table->available_remote_nodes[dword_location]; + dword_value |= (SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE << (dword_remainder * 4)); + remote_node_table->available_remote_nodes[dword_location] = dword_value; +} + +/** + * + * @remote_node_table: This is the remote node table that for which the group + * value is to be returned. + * @group_index: This is the group index to use to find the group value. + * + * This method will return the group value for the specified group index. The + * bit values at the specified remote node group index. + */ +static u8 sci_remote_node_table_get_group_value( + struct sci_remote_node_table *remote_node_table, + u32 group_index) +{ + u32 dword_location; + u32 dword_remainder; + u32 dword_value; + + dword_location = group_index / SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD; + dword_remainder = group_index % SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD; + + dword_value = remote_node_table->available_remote_nodes[dword_location]; + dword_value &= (SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE << (dword_remainder * 4)); + dword_value = dword_value >> (dword_remainder * 4); + + return (u8)dword_value; +} + +/** + * + * @out]: remote_node_table The remote that which is to be initialized. + * @remote_node_entries: The number of entries to put in the table. + * + * This method will initialize the remote node table for use. none + */ +void sci_remote_node_table_initialize( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_entries) +{ + u32 index; + + /* + * Initialize the raw data we could improve the speed by only initializing + * those entries that we are actually going to be used */ + memset( + remote_node_table->available_remote_nodes, + 0x00, + sizeof(remote_node_table->available_remote_nodes) + ); + + memset( + remote_node_table->remote_node_groups, + 0x00, + sizeof(remote_node_table->remote_node_groups) + ); + + /* Initialize the available remote node sets */ + remote_node_table->available_nodes_array_size = (u16) + (remote_node_entries / SCIC_SDS_REMOTE_NODES_PER_DWORD) + + ((remote_node_entries % SCIC_SDS_REMOTE_NODES_PER_DWORD) != 0); + + + /* Initialize each full DWORD to a FULL SET of remote nodes */ + for (index = 0; index < remote_node_entries; index++) { + sci_remote_node_table_set_node_index(remote_node_table, index); + } + + remote_node_table->group_array_size = (u16) + (remote_node_entries / (SCU_STP_REMOTE_NODE_COUNT * 32)) + + ((remote_node_entries % (SCU_STP_REMOTE_NODE_COUNT * 32)) != 0); + + for (index = 0; index < (remote_node_entries / SCU_STP_REMOTE_NODE_COUNT); index++) { + /* + * These are all guaranteed to be full slot values so fill them in the + * available sets of 3 remote nodes */ + sci_remote_node_table_set_group_index(remote_node_table, 2, index); + } + + /* Now fill in any remainders that we may find */ + if ((remote_node_entries % SCU_STP_REMOTE_NODE_COUNT) == 2) { + sci_remote_node_table_set_group_index(remote_node_table, 1, index); + } else if ((remote_node_entries % SCU_STP_REMOTE_NODE_COUNT) == 1) { + sci_remote_node_table_set_group_index(remote_node_table, 0, index); + } +} + +/** + * + * @out]: remote_node_table The remote node table from which to allocate a + * remote node. + * @table_index: The group index that is to be used for the search. + * + * This method will allocate a single RNi from the remote node table. The + * table index will determine from which remote node group table to search. + * This search may fail and another group node table can be specified. The + * function is designed to allow a serach of the available single remote node + * group up to the triple remote node group. If an entry is found in the + * specified table the remote node is removed and the remote node groups are + * updated. The RNi value or an invalid remote node context if an RNi can not + * be found. + */ +static u16 sci_remote_node_table_allocate_single_remote_node( + struct sci_remote_node_table *remote_node_table, + u32 group_table_index) +{ + u8 index; + u8 group_value; + u32 group_index; + u16 remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX; + + group_index = sci_remote_node_table_get_group_index( + remote_node_table, group_table_index); + + /* We could not find an available slot in the table selector 0 */ + if (group_index != SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX) { + group_value = sci_remote_node_table_get_group_value( + remote_node_table, group_index); + + for (index = 0; index < SCU_STP_REMOTE_NODE_COUNT; index++) { + if (((1 << index) & group_value) != 0) { + /* We have selected a bit now clear it */ + remote_node_index = (u16)(group_index * SCU_STP_REMOTE_NODE_COUNT + + index); + + sci_remote_node_table_clear_group_index( + remote_node_table, group_table_index, group_index + ); + + sci_remote_node_table_clear_node_index( + remote_node_table, remote_node_index + ); + + if (group_table_index > 0) { + sci_remote_node_table_set_group_index( + remote_node_table, group_table_index - 1, group_index + ); + } + + break; + } + } + } + + return remote_node_index; +} + +/** + * + * @remote_node_table: This is the remote node table from which to allocate the + * remote node entries. + * @group_table_index: THis is the group table index which must equal two (2) + * for this operation. + * + * This method will allocate three consecutive remote node context entries. If + * there are no remaining triple entries the function will return a failure. + * The remote node index that represents three consecutive remote node entries + * or an invalid remote node context if none can be found. + */ +static u16 sci_remote_node_table_allocate_triple_remote_node( + struct sci_remote_node_table *remote_node_table, + u32 group_table_index) +{ + u32 group_index; + u16 remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX; + + group_index = sci_remote_node_table_get_group_index( + remote_node_table, group_table_index); + + if (group_index != SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX) { + remote_node_index = (u16)group_index * SCU_STP_REMOTE_NODE_COUNT; + + sci_remote_node_table_clear_group_index( + remote_node_table, group_table_index, group_index + ); + + sci_remote_node_table_clear_group( + remote_node_table, group_index + ); + } + + return remote_node_index; +} + +/** + * + * @remote_node_table: This is the remote node table from which the remote node + * allocation is to take place. + * @remote_node_count: This is ther remote node count which is one of + * SCU_SSP_REMOTE_NODE_COUNT(1) or SCU_STP_REMOTE_NODE_COUNT(3). + * + * This method will allocate a remote node that mataches the remote node count + * specified by the caller. Valid values for remote node count is + * SCU_SSP_REMOTE_NODE_COUNT(1) or SCU_STP_REMOTE_NODE_COUNT(3). u16 This is + * the remote node index that is returned or an invalid remote node context. + */ +u16 sci_remote_node_table_allocate_remote_node( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_count) +{ + u16 remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX; + + if (remote_node_count == SCU_SSP_REMOTE_NODE_COUNT) { + remote_node_index = + sci_remote_node_table_allocate_single_remote_node( + remote_node_table, 0); + + if (remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) { + remote_node_index = + sci_remote_node_table_allocate_single_remote_node( + remote_node_table, 1); + } + + if (remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) { + remote_node_index = + sci_remote_node_table_allocate_single_remote_node( + remote_node_table, 2); + } + } else if (remote_node_count == SCU_STP_REMOTE_NODE_COUNT) { + remote_node_index = + sci_remote_node_table_allocate_triple_remote_node( + remote_node_table, 2); + } + + return remote_node_index; +} + +/** + * + * @remote_node_table: + * + * This method will free a single remote node index back to the remote node + * table. This routine will update the remote node groups + */ +static void sci_remote_node_table_release_single_remote_node( + struct sci_remote_node_table *remote_node_table, + u16 remote_node_index) +{ + u32 group_index; + u8 group_value; + + group_index = remote_node_index / SCU_STP_REMOTE_NODE_COUNT; + + group_value = sci_remote_node_table_get_group_value(remote_node_table, group_index); + + /* + * Assert that we are not trying to add an entry to a slot that is already + * full. */ + BUG_ON(group_value == SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE); + + if (group_value == 0x00) { + /* + * There are no entries in this slot so it must be added to the single + * slot table. */ + sci_remote_node_table_set_group_index(remote_node_table, 0, group_index); + } else if ((group_value & (group_value - 1)) == 0) { + /* + * There is only one entry in this slot so it must be moved from the + * single slot table to the dual slot table */ + sci_remote_node_table_clear_group_index(remote_node_table, 0, group_index); + sci_remote_node_table_set_group_index(remote_node_table, 1, group_index); + } else { + /* + * There are two entries in the slot so it must be moved from the dual + * slot table to the tripple slot table. */ + sci_remote_node_table_clear_group_index(remote_node_table, 1, group_index); + sci_remote_node_table_set_group_index(remote_node_table, 2, group_index); + } + + sci_remote_node_table_set_node_index(remote_node_table, remote_node_index); +} + +/** + * + * @remote_node_table: This is the remote node table to which the remote node + * index is to be freed. + * + * This method will release a group of three consecutive remote nodes back to + * the free remote nodes. + */ +static void sci_remote_node_table_release_triple_remote_node( + struct sci_remote_node_table *remote_node_table, + u16 remote_node_index) +{ + u32 group_index; + + group_index = remote_node_index / SCU_STP_REMOTE_NODE_COUNT; + + sci_remote_node_table_set_group_index( + remote_node_table, 2, group_index + ); + + sci_remote_node_table_set_group(remote_node_table, group_index); +} + +/** + * + * @remote_node_table: The remote node table to which the remote node index is + * to be freed. + * @remote_node_count: This is the count of consecutive remote nodes that are + * to be freed. + * + * This method will release the remote node index back into the remote node + * table free pool. + */ +void sci_remote_node_table_release_remote_node_index( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_count, + u16 remote_node_index) +{ + if (remote_node_count == SCU_SSP_REMOTE_NODE_COUNT) { + sci_remote_node_table_release_single_remote_node( + remote_node_table, remote_node_index); + } else if (remote_node_count == SCU_STP_REMOTE_NODE_COUNT) { + sci_remote_node_table_release_triple_remote_node( + remote_node_table, remote_node_index); + } +} + diff --git a/drivers/scsi/isci/remote_node_table.h b/drivers/scsi/isci/remote_node_table.h new file mode 100644 index 000000000000..721ab982d2ac --- /dev/null +++ b/drivers/scsi/isci/remote_node_table.h @@ -0,0 +1,188 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCIC_SDS_REMOTE_NODE_TABLE_H_ +#define _SCIC_SDS_REMOTE_NODE_TABLE_H_ + +#include "isci.h" + +/** + * + * + * Remote node sets are sets of remote node index in the remtoe node table The + * SCU hardware requires that STP remote node entries take three consecutive + * remote node index so the table is arranged in sets of three. The bits are + * used as 0111 0111 to make a byte and the bits define the set of three remote + * nodes to use as a sequence. + */ +#define SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE 2 + +/** + * + * + * Since the remote node table is organized as DWORDS take the remote node sets + * in bytes and represent them in DWORDs. The lowest ordered bits are the ones + * used in case full DWORD is not being used. i.e. 0000 0000 0000 0000 0111 + * 0111 0111 0111 // if only a single WORD is in use in the DWORD. + */ +#define SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD \ + (sizeof(u32) * SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE) +/** + * + * + * This is a count of the numeber of remote nodes that can be represented in a + * byte + */ +#define SCIC_SDS_REMOTE_NODES_PER_BYTE \ + (SCU_STP_REMOTE_NODE_COUNT * SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE) + +/** + * + * + * This is a count of the number of remote nodes that can be represented in a + * DWROD + */ +#define SCIC_SDS_REMOTE_NODES_PER_DWORD \ + (sizeof(u32) * SCIC_SDS_REMOTE_NODES_PER_BYTE) + +/** + * + * + * This is the number of bits in a remote node group + */ +#define SCIC_SDS_REMOTE_NODES_BITS_PER_GROUP 4 + +#define SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX (0xFFFFFFFF) +#define SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE (0x07) +#define SCIC_SDS_REMOTE_NODE_TABLE_EMPTY_SLOT_VALUE (0x00) + +/** + * + * + * Expander attached sata remote node count + */ +#define SCU_STP_REMOTE_NODE_COUNT 3 + +/** + * + * + * Expander or direct attached ssp remote node count + */ +#define SCU_SSP_REMOTE_NODE_COUNT 1 + +/** + * + * + * Direct attached STP remote node count + */ +#define SCU_SATA_REMOTE_NODE_COUNT 1 + +/** + * struct sci_remote_node_table - + * + * + */ +struct sci_remote_node_table { + /** + * This field contains the array size in dwords + */ + u16 available_nodes_array_size; + + /** + * This field contains the array size of the + */ + u16 group_array_size; + + /** + * This field is the array of available remote node entries in bits. + * Because of the way STP remote node data is allocated on the SCU hardware + * the remote nodes must occupy three consecutive remote node context + * entries. For ease of allocation and de-allocation we have broken the + * sets of three into a single nibble. When the STP RNi is allocated all + * of the bits in the nibble are cleared. This math results in a table size + * of MAX_REMOTE_NODES / CONSECUTIVE RNi ENTRIES for STP / 2 entries per byte. + */ + u32 available_remote_nodes[ + (SCI_MAX_REMOTE_DEVICES / SCIC_SDS_REMOTE_NODES_PER_DWORD) + + ((SCI_MAX_REMOTE_DEVICES % SCIC_SDS_REMOTE_NODES_PER_DWORD) != 0)]; + + /** + * This field is the nibble selector for the above table. There are three + * possible selectors each for fast lookup when trying to find one, two or + * three remote node entries. + */ + u32 remote_node_groups[ + SCU_STP_REMOTE_NODE_COUNT][ + (SCI_MAX_REMOTE_DEVICES / (32 * SCU_STP_REMOTE_NODE_COUNT)) + + ((SCI_MAX_REMOTE_DEVICES % (32 * SCU_STP_REMOTE_NODE_COUNT)) != 0)]; + +}; + +/* --------------------------------------------------------------------------- */ + +void sci_remote_node_table_initialize( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_entries); + +u16 sci_remote_node_table_allocate_remote_node( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_count); + +void sci_remote_node_table_release_remote_node_index( + struct sci_remote_node_table *remote_node_table, + u32 remote_node_count, + u16 remote_node_index); + +#endif /* _SCIC_SDS_REMOTE_NODE_TABLE_H_ */ diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c new file mode 100644 index 000000000000..a46e07ac789f --- /dev/null +++ b/drivers/scsi/isci/request.c @@ -0,0 +1,3391 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "isci.h" +#include "task.h" +#include "request.h" +#include "scu_completion_codes.h" +#include "scu_event_codes.h" +#include "sas.h" + +static struct scu_sgl_element_pair *to_sgl_element_pair(struct isci_request *ireq, + int idx) +{ + if (idx == 0) + return &ireq->tc->sgl_pair_ab; + else if (idx == 1) + return &ireq->tc->sgl_pair_cd; + else if (idx < 0) + return NULL; + else + return &ireq->sg_table[idx - 2]; +} + +static dma_addr_t to_sgl_element_pair_dma(struct isci_host *ihost, + struct isci_request *ireq, u32 idx) +{ + u32 offset; + + if (idx == 0) { + offset = (void *) &ireq->tc->sgl_pair_ab - + (void *) &ihost->task_context_table[0]; + return ihost->task_context_dma + offset; + } else if (idx == 1) { + offset = (void *) &ireq->tc->sgl_pair_cd - + (void *) &ihost->task_context_table[0]; + return ihost->task_context_dma + offset; + } + + return sci_io_request_get_dma_addr(ireq, &ireq->sg_table[idx - 2]); +} + +static void init_sgl_element(struct scu_sgl_element *e, struct scatterlist *sg) +{ + e->length = sg_dma_len(sg); + e->address_upper = upper_32_bits(sg_dma_address(sg)); + e->address_lower = lower_32_bits(sg_dma_address(sg)); + e->address_modifier = 0; +} + +static void sci_request_build_sgl(struct isci_request *ireq) +{ + struct isci_host *ihost = ireq->isci_host; + struct sas_task *task = isci_request_access_task(ireq); + struct scatterlist *sg = NULL; + dma_addr_t dma_addr; + u32 sg_idx = 0; + struct scu_sgl_element_pair *scu_sg = NULL; + struct scu_sgl_element_pair *prev_sg = NULL; + + if (task->num_scatter > 0) { + sg = task->scatter; + + while (sg) { + scu_sg = to_sgl_element_pair(ireq, sg_idx); + init_sgl_element(&scu_sg->A, sg); + sg = sg_next(sg); + if (sg) { + init_sgl_element(&scu_sg->B, sg); + sg = sg_next(sg); + } else + memset(&scu_sg->B, 0, sizeof(scu_sg->B)); + + if (prev_sg) { + dma_addr = to_sgl_element_pair_dma(ihost, + ireq, + sg_idx); + + prev_sg->next_pair_upper = + upper_32_bits(dma_addr); + prev_sg->next_pair_lower = + lower_32_bits(dma_addr); + } + + prev_sg = scu_sg; + sg_idx++; + } + } else { /* handle when no sg */ + scu_sg = to_sgl_element_pair(ireq, sg_idx); + + dma_addr = dma_map_single(&ihost->pdev->dev, + task->scatter, + task->total_xfer_len, + task->data_dir); + + ireq->zero_scatter_daddr = dma_addr; + + scu_sg->A.length = task->total_xfer_len; + scu_sg->A.address_upper = upper_32_bits(dma_addr); + scu_sg->A.address_lower = lower_32_bits(dma_addr); + } + + if (scu_sg) { + scu_sg->next_pair_upper = 0; + scu_sg->next_pair_lower = 0; + } +} + +static void sci_io_request_build_ssp_command_iu(struct isci_request *ireq) +{ + struct ssp_cmd_iu *cmd_iu; + struct sas_task *task = isci_request_access_task(ireq); + + cmd_iu = &ireq->ssp.cmd; + + memcpy(cmd_iu->LUN, task->ssp_task.LUN, 8); + cmd_iu->add_cdb_len = 0; + cmd_iu->_r_a = 0; + cmd_iu->_r_b = 0; + cmd_iu->en_fburst = 0; /* unsupported */ + cmd_iu->task_prio = task->ssp_task.task_prio; + cmd_iu->task_attr = task->ssp_task.task_attr; + cmd_iu->_r_c = 0; + + sci_swab32_cpy(&cmd_iu->cdb, task->ssp_task.cdb, + sizeof(task->ssp_task.cdb) / sizeof(u32)); +} + +static void sci_task_request_build_ssp_task_iu(struct isci_request *ireq) +{ + struct ssp_task_iu *task_iu; + struct sas_task *task = isci_request_access_task(ireq); + struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq); + + task_iu = &ireq->ssp.tmf; + + memset(task_iu, 0, sizeof(struct ssp_task_iu)); + + memcpy(task_iu->LUN, task->ssp_task.LUN, 8); + + task_iu->task_func = isci_tmf->tmf_code; + task_iu->task_tag = + (ireq->ttype == tmf_task) ? + isci_tmf->io_tag : + SCI_CONTROLLER_INVALID_IO_TAG; +} + +/** + * This method is will fill in the SCU Task Context for any type of SSP request. + * @sci_req: + * @task_context: + * + */ +static void scu_ssp_reqeust_construct_task_context( + struct isci_request *ireq, + struct scu_task_context *task_context) +{ + dma_addr_t dma_addr; + struct isci_remote_device *idev; + struct isci_port *iport; + + idev = ireq->target_device; + iport = idev->owning_port; + + /* Fill in the TC with the its required data */ + task_context->abort = 0; + task_context->priority = 0; + task_context->initiator_request = 1; + task_context->connection_rate = idev->connection_rate; + task_context->protocol_engine_index = ISCI_PEG; + task_context->logical_port_index = iport->physical_port_index; + task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; + task_context->valid = SCU_TASK_CONTEXT_VALID; + task_context->context_type = SCU_TASK_CONTEXT_TYPE; + + task_context->remote_node_index = idev->rnc.remote_node_index; + task_context->command_code = 0; + + task_context->link_layer_control = 0; + task_context->do_not_dma_ssp_good_response = 1; + task_context->strict_ordering = 0; + task_context->control_frame = 0; + task_context->timeout_enable = 0; + task_context->block_guard_enable = 0; + + task_context->address_modifier = 0; + + /* task_context->type.ssp.tag = ireq->io_tag; */ + task_context->task_phase = 0x01; + + ireq->post_context = (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + (ISCI_PEG << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | + (iport->physical_port_index << + SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | + ISCI_TAG_TCI(ireq->io_tag)); + + /* + * Copy the physical address for the command buffer to the + * SCU Task Context + */ + dma_addr = sci_io_request_get_dma_addr(ireq, &ireq->ssp.cmd); + + task_context->command_iu_upper = upper_32_bits(dma_addr); + task_context->command_iu_lower = lower_32_bits(dma_addr); + + /* + * Copy the physical address for the response buffer to the + * SCU Task Context + */ + dma_addr = sci_io_request_get_dma_addr(ireq, &ireq->ssp.rsp); + + task_context->response_iu_upper = upper_32_bits(dma_addr); + task_context->response_iu_lower = lower_32_bits(dma_addr); +} + +/** + * This method is will fill in the SCU Task Context for a SSP IO request. + * @sci_req: + * + */ +static void scu_ssp_io_request_construct_task_context(struct isci_request *ireq, + enum dma_data_direction dir, + u32 len) +{ + struct scu_task_context *task_context = ireq->tc; + + scu_ssp_reqeust_construct_task_context(ireq, task_context); + + task_context->ssp_command_iu_length = + sizeof(struct ssp_cmd_iu) / sizeof(u32); + task_context->type.ssp.frame_type = SSP_COMMAND; + + switch (dir) { + case DMA_FROM_DEVICE: + case DMA_NONE: + default: + task_context->task_type = SCU_TASK_TYPE_IOREAD; + break; + case DMA_TO_DEVICE: + task_context->task_type = SCU_TASK_TYPE_IOWRITE; + break; + } + + task_context->transfer_length_bytes = len; + + if (task_context->transfer_length_bytes > 0) + sci_request_build_sgl(ireq); +} + +/** + * This method will fill in the SCU Task Context for a SSP Task request. The + * following important settings are utilized: -# priority == + * SCU_TASK_PRIORITY_HIGH. This ensures that the task request is issued + * ahead of other task destined for the same Remote Node. -# task_type == + * SCU_TASK_TYPE_IOREAD. This simply indicates that a normal request type + * (i.e. non-raw frame) is being utilized to perform task management. -# + * control_frame == 1. This ensures that the proper endianess is set so + * that the bytes are transmitted in the right order for a task frame. + * @sci_req: This parameter specifies the task request object being + * constructed. + * + */ +static void scu_ssp_task_request_construct_task_context(struct isci_request *ireq) +{ + struct scu_task_context *task_context = ireq->tc; + + scu_ssp_reqeust_construct_task_context(ireq, task_context); + + task_context->control_frame = 1; + task_context->priority = SCU_TASK_PRIORITY_HIGH; + task_context->task_type = SCU_TASK_TYPE_RAW_FRAME; + task_context->transfer_length_bytes = 0; + task_context->type.ssp.frame_type = SSP_TASK; + task_context->ssp_command_iu_length = + sizeof(struct ssp_task_iu) / sizeof(u32); +} + +/** + * This method is will fill in the SCU Task Context for any type of SATA + * request. This is called from the various SATA constructors. + * @sci_req: The general IO request object which is to be used in + * constructing the SCU task context. + * @task_context: The buffer pointer for the SCU task context which is being + * constructed. + * + * The general io request construction is complete. The buffer assignment for + * the command buffer is complete. none Revisit task context construction to + * determine what is common for SSP/SMP/STP task context structures. + */ +static void scu_sata_reqeust_construct_task_context( + struct isci_request *ireq, + struct scu_task_context *task_context) +{ + dma_addr_t dma_addr; + struct isci_remote_device *idev; + struct isci_port *iport; + + idev = ireq->target_device; + iport = idev->owning_port; + + /* Fill in the TC with the its required data */ + task_context->abort = 0; + task_context->priority = SCU_TASK_PRIORITY_NORMAL; + task_context->initiator_request = 1; + task_context->connection_rate = idev->connection_rate; + task_context->protocol_engine_index = ISCI_PEG; + task_context->logical_port_index = iport->physical_port_index; + task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_STP; + task_context->valid = SCU_TASK_CONTEXT_VALID; + task_context->context_type = SCU_TASK_CONTEXT_TYPE; + + task_context->remote_node_index = idev->rnc.remote_node_index; + task_context->command_code = 0; + + task_context->link_layer_control = 0; + task_context->do_not_dma_ssp_good_response = 1; + task_context->strict_ordering = 0; + task_context->control_frame = 0; + task_context->timeout_enable = 0; + task_context->block_guard_enable = 0; + + task_context->address_modifier = 0; + task_context->task_phase = 0x01; + + task_context->ssp_command_iu_length = + (sizeof(struct host_to_dev_fis) - sizeof(u32)) / sizeof(u32); + + /* Set the first word of the H2D REG FIS */ + task_context->type.words[0] = *(u32 *)&ireq->stp.cmd; + + ireq->post_context = (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + (ISCI_PEG << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | + (iport->physical_port_index << + SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | + ISCI_TAG_TCI(ireq->io_tag)); + /* + * Copy the physical address for the command buffer to the SCU Task + * Context. We must offset the command buffer by 4 bytes because the + * first 4 bytes are transfered in the body of the TC. + */ + dma_addr = sci_io_request_get_dma_addr(ireq, + ((char *) &ireq->stp.cmd) + + sizeof(u32)); + + task_context->command_iu_upper = upper_32_bits(dma_addr); + task_context->command_iu_lower = lower_32_bits(dma_addr); + + /* SATA Requests do not have a response buffer */ + task_context->response_iu_upper = 0; + task_context->response_iu_lower = 0; +} + +static void scu_stp_raw_request_construct_task_context(struct isci_request *ireq) +{ + struct scu_task_context *task_context = ireq->tc; + + scu_sata_reqeust_construct_task_context(ireq, task_context); + + task_context->control_frame = 0; + task_context->priority = SCU_TASK_PRIORITY_NORMAL; + task_context->task_type = SCU_TASK_TYPE_SATA_RAW_FRAME; + task_context->type.stp.fis_type = FIS_REGH2D; + task_context->transfer_length_bytes = sizeof(struct host_to_dev_fis) - sizeof(u32); +} + +static enum sci_status sci_stp_pio_request_construct(struct isci_request *ireq, + bool copy_rx_frame) +{ + struct isci_stp_request *stp_req = &ireq->stp.req; + + scu_stp_raw_request_construct_task_context(ireq); + + stp_req->status = 0; + stp_req->sgl.offset = 0; + stp_req->sgl.set = SCU_SGL_ELEMENT_PAIR_A; + + if (copy_rx_frame) { + sci_request_build_sgl(ireq); + stp_req->sgl.index = 0; + } else { + /* The user does not want the data copied to the SGL buffer location */ + stp_req->sgl.index = -1; + } + + return SCI_SUCCESS; +} + +/** + * + * @sci_req: This parameter specifies the request to be constructed as an + * optimized request. + * @optimized_task_type: This parameter specifies whether the request is to be + * an UDMA request or a NCQ request. - A value of 0 indicates UDMA. - A + * value of 1 indicates NCQ. + * + * This method will perform request construction common to all types of STP + * requests that are optimized by the silicon (i.e. UDMA, NCQ). This method + * returns an indication as to whether the construction was successful. + */ +static void sci_stp_optimized_request_construct(struct isci_request *ireq, + u8 optimized_task_type, + u32 len, + enum dma_data_direction dir) +{ + struct scu_task_context *task_context = ireq->tc; + + /* Build the STP task context structure */ + scu_sata_reqeust_construct_task_context(ireq, task_context); + + /* Copy over the SGL elements */ + sci_request_build_sgl(ireq); + + /* Copy over the number of bytes to be transfered */ + task_context->transfer_length_bytes = len; + + if (dir == DMA_TO_DEVICE) { + /* + * The difference between the DMA IN and DMA OUT request task type + * values are consistent with the difference between FPDMA READ + * and FPDMA WRITE values. Add the supplied task type parameter + * to this difference to set the task type properly for this + * DATA OUT (WRITE) case. */ + task_context->task_type = optimized_task_type + (SCU_TASK_TYPE_DMA_OUT + - SCU_TASK_TYPE_DMA_IN); + } else { + /* + * For the DATA IN (READ) case, simply save the supplied + * optimized task type. */ + task_context->task_type = optimized_task_type; + } +} + + + +static enum sci_status +sci_io_request_construct_sata(struct isci_request *ireq, + u32 len, + enum dma_data_direction dir, + bool copy) +{ + enum sci_status status = SCI_SUCCESS; + struct sas_task *task = isci_request_access_task(ireq); + + /* check for management protocols */ + if (ireq->ttype == tmf_task) { + struct isci_tmf *tmf = isci_request_access_tmf(ireq); + + if (tmf->tmf_code == isci_tmf_sata_srst_high || + tmf->tmf_code == isci_tmf_sata_srst_low) { + scu_stp_raw_request_construct_task_context(ireq); + return SCI_SUCCESS; + } else { + dev_err(&ireq->owning_controller->pdev->dev, + "%s: Request 0x%p received un-handled SAT " + "management protocol 0x%x.\n", + __func__, ireq, tmf->tmf_code); + + return SCI_FAILURE; + } + } + + if (!sas_protocol_ata(task->task_proto)) { + dev_err(&ireq->owning_controller->pdev->dev, + "%s: Non-ATA protocol in SATA path: 0x%x\n", + __func__, + task->task_proto); + return SCI_FAILURE; + + } + + /* non data */ + if (task->data_dir == DMA_NONE) { + scu_stp_raw_request_construct_task_context(ireq); + return SCI_SUCCESS; + } + + /* NCQ */ + if (task->ata_task.use_ncq) { + sci_stp_optimized_request_construct(ireq, + SCU_TASK_TYPE_FPDMAQ_READ, + len, dir); + return SCI_SUCCESS; + } + + /* DMA */ + if (task->ata_task.dma_xfer) { + sci_stp_optimized_request_construct(ireq, + SCU_TASK_TYPE_DMA_IN, + len, dir); + return SCI_SUCCESS; + } else /* PIO */ + return sci_stp_pio_request_construct(ireq, copy); + + return status; +} + +static enum sci_status sci_io_request_construct_basic_ssp(struct isci_request *ireq) +{ + struct sas_task *task = isci_request_access_task(ireq); + + ireq->protocol = SCIC_SSP_PROTOCOL; + + scu_ssp_io_request_construct_task_context(ireq, + task->data_dir, + task->total_xfer_len); + + sci_io_request_build_ssp_command_iu(ireq); + + sci_change_state(&ireq->sm, SCI_REQ_CONSTRUCTED); + + return SCI_SUCCESS; +} + +enum sci_status sci_task_request_construct_ssp( + struct isci_request *ireq) +{ + /* Construct the SSP Task SCU Task Context */ + scu_ssp_task_request_construct_task_context(ireq); + + /* Fill in the SSP Task IU */ + sci_task_request_build_ssp_task_iu(ireq); + + sci_change_state(&ireq->sm, SCI_REQ_CONSTRUCTED); + + return SCI_SUCCESS; +} + +static enum sci_status sci_io_request_construct_basic_sata(struct isci_request *ireq) +{ + enum sci_status status; + bool copy = false; + struct sas_task *task = isci_request_access_task(ireq); + + ireq->protocol = SCIC_STP_PROTOCOL; + + copy = (task->data_dir == DMA_NONE) ? false : true; + + status = sci_io_request_construct_sata(ireq, + task->total_xfer_len, + task->data_dir, + copy); + + if (status == SCI_SUCCESS) + sci_change_state(&ireq->sm, SCI_REQ_CONSTRUCTED); + + return status; +} + +enum sci_status sci_task_request_construct_sata(struct isci_request *ireq) +{ + enum sci_status status = SCI_SUCCESS; + + /* check for management protocols */ + if (ireq->ttype == tmf_task) { + struct isci_tmf *tmf = isci_request_access_tmf(ireq); + + if (tmf->tmf_code == isci_tmf_sata_srst_high || + tmf->tmf_code == isci_tmf_sata_srst_low) { + scu_stp_raw_request_construct_task_context(ireq); + } else { + dev_err(&ireq->owning_controller->pdev->dev, + "%s: Request 0x%p received un-handled SAT " + "Protocol 0x%x.\n", + __func__, ireq, tmf->tmf_code); + + return SCI_FAILURE; + } + } + + if (status != SCI_SUCCESS) + return status; + sci_change_state(&ireq->sm, SCI_REQ_CONSTRUCTED); + + return status; +} + +/** + * sci_req_tx_bytes - bytes transferred when reply underruns request + * @sci_req: request that was terminated early + */ +#define SCU_TASK_CONTEXT_SRAM 0x200000 +static u32 sci_req_tx_bytes(struct isci_request *ireq) +{ + struct isci_host *ihost = ireq->owning_controller; + u32 ret_val = 0; + + if (readl(&ihost->smu_registers->address_modifier) == 0) { + void __iomem *scu_reg_base = ihost->scu_registers; + + /* get the bytes of data from the Address == BAR1 + 20002Ch + (256*TCi) where + * BAR1 is the scu_registers + * 0x20002C = 0x200000 + 0x2c + * = start of task context SRAM + offset of (type.ssp.data_offset) + * TCi is the io_tag of struct sci_request + */ + ret_val = readl(scu_reg_base + + (SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) + + ((sizeof(struct scu_task_context)) * ISCI_TAG_TCI(ireq->io_tag))); + } + + return ret_val; +} + +enum sci_status sci_request_start(struct isci_request *ireq) +{ + enum sci_base_request_states state; + struct scu_task_context *tc = ireq->tc; + struct isci_host *ihost = ireq->owning_controller; + + state = ireq->sm.current_state_id; + if (state != SCI_REQ_CONSTRUCTED) { + dev_warn(&ihost->pdev->dev, + "%s: SCIC IO Request requested to start while in wrong " + "state %d\n", __func__, state); + return SCI_FAILURE_INVALID_STATE; + } + + tc->task_index = ISCI_TAG_TCI(ireq->io_tag); + + switch (tc->protocol_type) { + case SCU_TASK_CONTEXT_PROTOCOL_SMP: + case SCU_TASK_CONTEXT_PROTOCOL_SSP: + /* SSP/SMP Frame */ + tc->type.ssp.tag = ireq->io_tag; + tc->type.ssp.target_port_transfer_tag = 0xFFFF; + break; + + case SCU_TASK_CONTEXT_PROTOCOL_STP: + /* STP/SATA Frame + * tc->type.stp.ncq_tag = ireq->ncq_tag; + */ + break; + + case SCU_TASK_CONTEXT_PROTOCOL_NONE: + /* / @todo When do we set no protocol type? */ + break; + + default: + /* This should never happen since we build the IO + * requests */ + break; + } + + /* Add to the post_context the io tag value */ + ireq->post_context |= ISCI_TAG_TCI(ireq->io_tag); + + /* Everything is good go ahead and change state */ + sci_change_state(&ireq->sm, SCI_REQ_STARTED); + + return SCI_SUCCESS; +} + +enum sci_status +sci_io_request_terminate(struct isci_request *ireq) +{ + enum sci_base_request_states state; + + state = ireq->sm.current_state_id; + + switch (state) { + case SCI_REQ_CONSTRUCTED: + ireq->scu_status = SCU_TASK_DONE_TASK_ABORT; + ireq->sci_status = SCI_FAILURE_IO_TERMINATED; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + return SCI_SUCCESS; + case SCI_REQ_STARTED: + case SCI_REQ_TASK_WAIT_TC_COMP: + case SCI_REQ_SMP_WAIT_RESP: + case SCI_REQ_SMP_WAIT_TC_COMP: + case SCI_REQ_STP_UDMA_WAIT_TC_COMP: + case SCI_REQ_STP_UDMA_WAIT_D2H: + case SCI_REQ_STP_NON_DATA_WAIT_H2D: + case SCI_REQ_STP_NON_DATA_WAIT_D2H: + case SCI_REQ_STP_PIO_WAIT_H2D: + case SCI_REQ_STP_PIO_WAIT_FRAME: + case SCI_REQ_STP_PIO_DATA_IN: + case SCI_REQ_STP_PIO_DATA_OUT: + case SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED: + case SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG: + case SCI_REQ_STP_SOFT_RESET_WAIT_D2H: + sci_change_state(&ireq->sm, SCI_REQ_ABORTING); + return SCI_SUCCESS; + case SCI_REQ_TASK_WAIT_TC_RESP: + sci_change_state(&ireq->sm, SCI_REQ_ABORTING); + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + return SCI_SUCCESS; + case SCI_REQ_ABORTING: + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + return SCI_SUCCESS; + case SCI_REQ_COMPLETED: + default: + dev_warn(&ireq->owning_controller->pdev->dev, + "%s: SCIC IO Request requested to abort while in wrong " + "state %d\n", + __func__, + ireq->sm.current_state_id); + break; + } + + return SCI_FAILURE_INVALID_STATE; +} + +enum sci_status sci_request_complete(struct isci_request *ireq) +{ + enum sci_base_request_states state; + struct isci_host *ihost = ireq->owning_controller; + + state = ireq->sm.current_state_id; + if (WARN_ONCE(state != SCI_REQ_COMPLETED, + "isci: request completion from wrong state (%d)\n", state)) + return SCI_FAILURE_INVALID_STATE; + + if (ireq->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX) + sci_controller_release_frame(ihost, + ireq->saved_rx_frame_index); + + /* XXX can we just stop the machine and remove the 'final' state? */ + sci_change_state(&ireq->sm, SCI_REQ_FINAL); + return SCI_SUCCESS; +} + +enum sci_status sci_io_request_event_handler(struct isci_request *ireq, + u32 event_code) +{ + enum sci_base_request_states state; + struct isci_host *ihost = ireq->owning_controller; + + state = ireq->sm.current_state_id; + + if (state != SCI_REQ_STP_PIO_DATA_IN) { + dev_warn(&ihost->pdev->dev, "%s: (%x) in wrong state %d\n", + __func__, event_code, state); + + return SCI_FAILURE_INVALID_STATE; + } + + switch (scu_get_event_specifier(event_code)) { + case SCU_TASK_DONE_CRC_ERR << SCU_EVENT_SPECIFIC_CODE_SHIFT: + /* We are waiting for data and the SCU has R_ERR the data frame. + * Go back to waiting for the D2H Register FIS + */ + sci_change_state(&ireq->sm, SCI_REQ_STP_PIO_WAIT_FRAME); + return SCI_SUCCESS; + default: + dev_err(&ihost->pdev->dev, + "%s: pio request unexpected event %#x\n", + __func__, event_code); + + /* TODO Should we fail the PIO request when we get an + * unexpected event? + */ + return SCI_FAILURE; + } +} + +/* + * This function copies response data for requests returning response data + * instead of sense data. + * @sci_req: This parameter specifies the request object for which to copy + * the response data. + */ +static void sci_io_request_copy_response(struct isci_request *ireq) +{ + void *resp_buf; + u32 len; + struct ssp_response_iu *ssp_response; + struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq); + + ssp_response = &ireq->ssp.rsp; + + resp_buf = &isci_tmf->resp.resp_iu; + + len = min_t(u32, + SSP_RESP_IU_MAX_SIZE, + be32_to_cpu(ssp_response->response_data_len)); + + memcpy(resp_buf, ssp_response->resp_data, len); +} + +static enum sci_status +request_started_state_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + struct ssp_response_iu *resp_iu; + u8 datapres; + + /* TODO: Any SDMA return code of other than 0 is bad decode 0x003C0000 + * to determine SDMA status + */ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + break; + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EARLY_RESP): { + /* There are times when the SCU hardware will return an early + * response because the io request specified more data than is + * returned by the target device (mode pages, inquiry data, + * etc.). We must check the response stats to see if this is + * truly a failed request or a good request that just got + * completed early. + */ + struct ssp_response_iu *resp = &ireq->ssp.rsp; + ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); + + sci_swab32_cpy(&ireq->ssp.rsp, + &ireq->ssp.rsp, + word_cnt); + + if (resp->status == 0) { + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS_IO_DONE_EARLY; + } else { + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + } + break; + } + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CHECK_RESPONSE): { + ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); + + sci_swab32_cpy(&ireq->ssp.rsp, + &ireq->ssp.rsp, + word_cnt); + + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + break; + } + + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RESP_LEN_ERR): + /* TODO With TASK_DONE_RESP_LEN_ERR is the response frame + * guaranteed to be received before this completion status is + * posted? + */ + resp_iu = &ireq->ssp.rsp; + datapres = resp_iu->datapres; + + if (datapres == 1 || datapres == 2) { + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + } else { + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + } + break; + /* only stp device gets suspended. */ + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_PERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_DATA_LEN_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_ABORT_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_WD_LEN): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_RESP): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_SDBFIS): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDB_ERR): + if (ireq->protocol == SCIC_STP_PROTOCOL) { + ireq->scu_status = SCU_GET_COMPLETION_TL_STATUS(completion_code) >> + SCU_COMPLETION_TL_STATUS_SHIFT; + ireq->sci_status = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; + } else { + ireq->scu_status = SCU_GET_COMPLETION_TL_STATUS(completion_code) >> + SCU_COMPLETION_TL_STATUS_SHIFT; + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + } + break; + + /* both stp/ssp device gets suspended */ + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LF_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_WRONG_DESTINATION): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_BAD_DESTINATION): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_ZONE_VIOLATION): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED): + ireq->scu_status = SCU_GET_COMPLETION_TL_STATUS(completion_code) >> + SCU_COMPLETION_TL_STATUS_SHIFT; + ireq->sci_status = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; + break; + + /* neither ssp nor stp gets suspended. */ + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_CMD_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_XR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_IU_LEN_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDMA_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OFFSET_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EXCESS_DATA): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_DATA): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OPEN_FAIL): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_VIIT_ENTRY_NV): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_IIT_ENTRY_NV): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RNCNV_OUTBOUND): + default: + ireq->scu_status = SCU_GET_COMPLETION_TL_STATUS(completion_code) >> + SCU_COMPLETION_TL_STATUS_SHIFT; + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + break; + } + + /* + * TODO: This is probably wrong for ACK/NAK timeout conditions + */ + + /* In all cases we will treat this as the completion of the IO req. */ + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + return SCI_SUCCESS; +} + +static enum sci_status +request_aborting_state_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case (SCU_TASK_DONE_GOOD << SCU_COMPLETION_TL_STATUS_SHIFT): + case (SCU_TASK_DONE_TASK_ABORT << SCU_COMPLETION_TL_STATUS_SHIFT): + ireq->scu_status = SCU_TASK_DONE_TASK_ABORT; + ireq->sci_status = SCI_FAILURE_IO_TERMINATED; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + + default: + /* Unless we get some strange error wait for the task abort to complete + * TODO: Should there be a state change for this completion? + */ + break; + } + + return SCI_SUCCESS; +} + +static enum sci_status ssp_task_request_await_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_TASK_WAIT_TC_RESP); + break; + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO): + /* Currently, the decision is to simply allow the task request + * to timeout if the task IU wasn't received successfully. + * There is a potential for receiving multiple task responses if + * we decide to send the task IU again. + */ + dev_warn(&ireq->owning_controller->pdev->dev, + "%s: TaskRequest:0x%p CompletionCode:%x - " + "ACK/NAK timeout\n", __func__, ireq, + completion_code); + + sci_change_state(&ireq->sm, SCI_REQ_TASK_WAIT_TC_RESP); + break; + default: + /* + * All other completion status cause the IO to be complete. + * If a NAK was received, then it is up to the user to retry + * the request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return SCI_SUCCESS; +} + +static enum sci_status +smp_request_await_response_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + /* In the AWAIT RESPONSE state, any TC completion is + * unexpected. but if the TC has success status, we + * complete the IO anyway. + */ + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR): + /* These status has been seen in a specific LSI + * expander, which sometimes is not able to send smp + * response within 2 ms. This causes our hardware break + * the connection and set TC completion with one of + * these SMP_XXX_XX_ERR status. For these type of error, + * we ask ihost user to retry the request. + */ + ireq->scu_status = SCU_TASK_DONE_SMP_RESP_TO_ERR; + ireq->sci_status = SCI_FAILURE_RETRY_REQUIRED; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + default: + /* All other completion status cause the IO to be complete. If a NAK + * was received, then it is up to the user to retry the request + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return SCI_SUCCESS; +} + +static enum sci_status +smp_request_await_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + default: + /* All other completion status cause the IO to be + * complete. If a NAK was received, then it is up to + * the user to retry the request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return SCI_SUCCESS; +} + +static struct scu_sgl_element *pio_sgl_next(struct isci_stp_request *stp_req) +{ + struct scu_sgl_element *sgl; + struct scu_sgl_element_pair *sgl_pair; + struct isci_request *ireq = to_ireq(stp_req); + struct isci_stp_pio_sgl *pio_sgl = &stp_req->sgl; + + sgl_pair = to_sgl_element_pair(ireq, pio_sgl->index); + if (!sgl_pair) + sgl = NULL; + else if (pio_sgl->set == SCU_SGL_ELEMENT_PAIR_A) { + if (sgl_pair->B.address_lower == 0 && + sgl_pair->B.address_upper == 0) { + sgl = NULL; + } else { + pio_sgl->set = SCU_SGL_ELEMENT_PAIR_B; + sgl = &sgl_pair->B; + } + } else { + if (sgl_pair->next_pair_lower == 0 && + sgl_pair->next_pair_upper == 0) { + sgl = NULL; + } else { + pio_sgl->index++; + pio_sgl->set = SCU_SGL_ELEMENT_PAIR_A; + sgl_pair = to_sgl_element_pair(ireq, pio_sgl->index); + sgl = &sgl_pair->A; + } + } + + return sgl; +} + +static enum sci_status +stp_request_non_data_await_h2d_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_STP_NON_DATA_WAIT_D2H); + break; + + default: + /* All other completion status cause the IO to be + * complete. If a NAK was received, then it is up to + * the user to retry the request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return SCI_SUCCESS; +} + +#define SCU_MAX_FRAME_BUFFER_SIZE 0x400 /* 1K is the maximum SCU frame data payload */ + +/* transmit DATA_FIS from (current sgl + offset) for input + * parameter length. current sgl and offset is alreay stored in the IO request + */ +static enum sci_status sci_stp_request_pio_data_out_trasmit_data_frame( + struct isci_request *ireq, + u32 length) +{ + struct isci_stp_request *stp_req = &ireq->stp.req; + struct scu_task_context *task_context = ireq->tc; + struct scu_sgl_element_pair *sgl_pair; + struct scu_sgl_element *current_sgl; + + /* Recycle the TC and reconstruct it for sending out DATA FIS containing + * for the data from current_sgl+offset for the input length + */ + sgl_pair = to_sgl_element_pair(ireq, stp_req->sgl.index); + if (stp_req->sgl.set == SCU_SGL_ELEMENT_PAIR_A) + current_sgl = &sgl_pair->A; + else + current_sgl = &sgl_pair->B; + + /* update the TC */ + task_context->command_iu_upper = current_sgl->address_upper; + task_context->command_iu_lower = current_sgl->address_lower; + task_context->transfer_length_bytes = length; + task_context->type.stp.fis_type = FIS_DATA; + + /* send the new TC out. */ + return sci_controller_continue_io(ireq); +} + +static enum sci_status sci_stp_request_pio_data_out_transmit_data(struct isci_request *ireq) +{ + struct isci_stp_request *stp_req = &ireq->stp.req; + struct scu_sgl_element_pair *sgl_pair; + struct scu_sgl_element *sgl; + enum sci_status status; + u32 offset; + u32 len = 0; + + offset = stp_req->sgl.offset; + sgl_pair = to_sgl_element_pair(ireq, stp_req->sgl.index); + if (WARN_ONCE(!sgl_pair, "%s: null sgl element", __func__)) + return SCI_FAILURE; + + if (stp_req->sgl.set == SCU_SGL_ELEMENT_PAIR_A) { + sgl = &sgl_pair->A; + len = sgl_pair->A.length - offset; + } else { + sgl = &sgl_pair->B; + len = sgl_pair->B.length - offset; + } + + if (stp_req->pio_len == 0) + return SCI_SUCCESS; + + if (stp_req->pio_len >= len) { + status = sci_stp_request_pio_data_out_trasmit_data_frame(ireq, len); + if (status != SCI_SUCCESS) + return status; + stp_req->pio_len -= len; + + /* update the current sgl, offset and save for future */ + sgl = pio_sgl_next(stp_req); + offset = 0; + } else if (stp_req->pio_len < len) { + sci_stp_request_pio_data_out_trasmit_data_frame(ireq, stp_req->pio_len); + + /* Sgl offset will be adjusted and saved for future */ + offset += stp_req->pio_len; + sgl->address_lower += stp_req->pio_len; + stp_req->pio_len = 0; + } + + stp_req->sgl.offset = offset; + + return status; +} + +/** + * + * @stp_request: The request that is used for the SGL processing. + * @data_buffer: The buffer of data to be copied. + * @length: The length of the data transfer. + * + * Copy the data from the buffer for the length specified to the IO reqeust SGL + * specified data region. enum sci_status + */ +static enum sci_status +sci_stp_request_pio_data_in_copy_data_buffer(struct isci_stp_request *stp_req, + u8 *data_buf, u32 len) +{ + struct isci_request *ireq; + u8 *src_addr; + int copy_len; + struct sas_task *task; + struct scatterlist *sg; + void *kaddr; + int total_len = len; + + ireq = to_ireq(stp_req); + task = isci_request_access_task(ireq); + src_addr = data_buf; + + if (task->num_scatter > 0) { + sg = task->scatter; + + while (total_len > 0) { + struct page *page = sg_page(sg); + + copy_len = min_t(int, total_len, sg_dma_len(sg)); + kaddr = kmap_atomic(page, KM_IRQ0); + memcpy(kaddr + sg->offset, src_addr, copy_len); + kunmap_atomic(kaddr, KM_IRQ0); + total_len -= copy_len; + src_addr += copy_len; + sg = sg_next(sg); + } + } else { + BUG_ON(task->total_xfer_len < total_len); + memcpy(task->scatter, src_addr, total_len); + } + + return SCI_SUCCESS; +} + +/** + * + * @sci_req: The PIO DATA IN request that is to receive the data. + * @data_buffer: The buffer to copy from. + * + * Copy the data buffer to the io request data region. enum sci_status + */ +static enum sci_status sci_stp_request_pio_data_in_copy_data( + struct isci_stp_request *stp_req, + u8 *data_buffer) +{ + enum sci_status status; + + /* + * If there is less than 1K remaining in the transfer request + * copy just the data for the transfer */ + if (stp_req->pio_len < SCU_MAX_FRAME_BUFFER_SIZE) { + status = sci_stp_request_pio_data_in_copy_data_buffer( + stp_req, data_buffer, stp_req->pio_len); + + if (status == SCI_SUCCESS) + stp_req->pio_len = 0; + } else { + /* We are transfering the whole frame so copy */ + status = sci_stp_request_pio_data_in_copy_data_buffer( + stp_req, data_buffer, SCU_MAX_FRAME_BUFFER_SIZE); + + if (status == SCI_SUCCESS) + stp_req->pio_len -= SCU_MAX_FRAME_BUFFER_SIZE; + } + + return status; +} + +static enum sci_status +stp_request_pio_await_h2d_completion_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + enum sci_status status = SCI_SUCCESS; + + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_STP_PIO_WAIT_FRAME); + break; + + default: + /* All other completion status cause the IO to be + * complete. If a NAK was received, then it is up to + * the user to retry the request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return status; +} + +static enum sci_status +pio_data_out_tx_done_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + enum sci_status status = SCI_SUCCESS; + bool all_frames_transferred = false; + struct isci_stp_request *stp_req = &ireq->stp.req; + + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + /* Transmit data */ + if (stp_req->pio_len != 0) { + status = sci_stp_request_pio_data_out_transmit_data(ireq); + if (status == SCI_SUCCESS) { + if (stp_req->pio_len == 0) + all_frames_transferred = true; + } + } else if (stp_req->pio_len == 0) { + /* + * this will happen if the all data is written at the + * first time after the pio setup fis is received + */ + all_frames_transferred = true; + } + + /* all data transferred. */ + if (all_frames_transferred) { + /* + * Change the state to SCI_REQ_STP_PIO_DATA_IN + * and wait for PIO_SETUP fis / or D2H REg fis. */ + sci_change_state(&ireq->sm, SCI_REQ_STP_PIO_WAIT_FRAME); + } + break; + + default: + /* + * All other completion status cause the IO to be complete. + * If a NAK was received, then it is up to the user to retry + * the request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return status; +} + +static enum sci_status sci_stp_request_udma_general_frame_handler(struct isci_request *ireq, + u32 frame_index) +{ + struct isci_host *ihost = ireq->owning_controller; + struct dev_to_host_fis *frame_header; + enum sci_status status; + u32 *frame_buffer; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_header); + + if ((status == SCI_SUCCESS) && + (frame_header->fis_type == FIS_REGD2H)) { + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&frame_buffer); + + sci_controller_copy_sata_response(&ireq->stp.rsp, + frame_header, + frame_buffer); + } + + sci_controller_release_frame(ihost, frame_index); + + return status; +} + +enum sci_status +sci_io_request_frame_handler(struct isci_request *ireq, + u32 frame_index) +{ + struct isci_host *ihost = ireq->owning_controller; + struct isci_stp_request *stp_req = &ireq->stp.req; + enum sci_base_request_states state; + enum sci_status status; + ssize_t word_cnt; + + state = ireq->sm.current_state_id; + switch (state) { + case SCI_REQ_STARTED: { + struct ssp_frame_hdr ssp_hdr; + void *frame_header; + + sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + &frame_header); + + word_cnt = sizeof(struct ssp_frame_hdr) / sizeof(u32); + sci_swab32_cpy(&ssp_hdr, frame_header, word_cnt); + + if (ssp_hdr.frame_type == SSP_RESPONSE) { + struct ssp_response_iu *resp_iu; + ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); + + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&resp_iu); + + sci_swab32_cpy(&ireq->ssp.rsp, resp_iu, word_cnt); + + resp_iu = &ireq->ssp.rsp; + + if (resp_iu->datapres == 0x01 || + resp_iu->datapres == 0x02) { + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + } else { + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + } + } else { + /* not a response frame, why did it get forwarded? */ + dev_err(&ihost->pdev->dev, + "%s: SCIC IO Request 0x%p received unexpected " + "frame %d type 0x%02x\n", __func__, ireq, + frame_index, ssp_hdr.frame_type); + } + + /* + * In any case we are done with this frame buffer return it to + * the controller + */ + sci_controller_release_frame(ihost, frame_index); + + return SCI_SUCCESS; + } + + case SCI_REQ_TASK_WAIT_TC_RESP: + sci_io_request_copy_response(ireq); + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + sci_controller_release_frame(ihost, frame_index); + return SCI_SUCCESS; + + case SCI_REQ_SMP_WAIT_RESP: { + struct smp_resp *rsp_hdr = &ireq->smp.rsp; + void *frame_header; + + sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + &frame_header); + + /* byte swap the header. */ + word_cnt = SMP_RESP_HDR_SZ / sizeof(u32); + sci_swab32_cpy(rsp_hdr, frame_header, word_cnt); + + if (rsp_hdr->frame_type == SMP_RESPONSE) { + void *smp_resp; + + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + &smp_resp); + + word_cnt = (sizeof(struct smp_resp) - SMP_RESP_HDR_SZ) / + sizeof(u32); + + sci_swab32_cpy(((u8 *) rsp_hdr) + SMP_RESP_HDR_SZ, + smp_resp, word_cnt); + + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_SMP_WAIT_TC_COMP); + } else { + /* + * This was not a response frame why did it get + * forwarded? + */ + dev_err(&ihost->pdev->dev, + "%s: SCIC SMP Request 0x%p received unexpected " + "frame %d type 0x%02x\n", + __func__, + ireq, + frame_index, + rsp_hdr->frame_type); + + ireq->scu_status = SCU_TASK_DONE_SMP_FRM_TYPE_ERR; + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + } + + sci_controller_release_frame(ihost, frame_index); + + return SCI_SUCCESS; + } + + case SCI_REQ_STP_UDMA_WAIT_TC_COMP: + return sci_stp_request_udma_general_frame_handler(ireq, + frame_index); + + case SCI_REQ_STP_UDMA_WAIT_D2H: + /* Use the general frame handler to copy the resposne data */ + status = sci_stp_request_udma_general_frame_handler(ireq, frame_index); + + if (status != SCI_SUCCESS) + return status; + + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + return SCI_SUCCESS; + + case SCI_REQ_STP_NON_DATA_WAIT_D2H: { + struct dev_to_host_fis *frame_header; + u32 *frame_buffer; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_header); + + if (status != SCI_SUCCESS) { + dev_err(&ihost->pdev->dev, + "%s: SCIC IO Request 0x%p could not get frame " + "header for frame index %d, status %x\n", + __func__, + stp_req, + frame_index, + status); + + return status; + } + + switch (frame_header->fis_type) { + case FIS_REGD2H: + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&frame_buffer); + + sci_controller_copy_sata_response(&ireq->stp.rsp, + frame_header, + frame_buffer); + + /* The command has completed with error */ + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + break; + + default: + dev_warn(&ihost->pdev->dev, + "%s: IO Request:0x%p Frame Id:%d protocol " + "violation occurred\n", __func__, stp_req, + frame_index); + + ireq->scu_status = SCU_TASK_DONE_UNEXP_FIS; + ireq->sci_status = SCI_FAILURE_PROTOCOL_VIOLATION; + break; + } + + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + + /* Frame has been decoded return it to the controller */ + sci_controller_release_frame(ihost, frame_index); + + return status; + } + + case SCI_REQ_STP_PIO_WAIT_FRAME: { + struct sas_task *task = isci_request_access_task(ireq); + struct dev_to_host_fis *frame_header; + u32 *frame_buffer; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_header); + + if (status != SCI_SUCCESS) { + dev_err(&ihost->pdev->dev, + "%s: SCIC IO Request 0x%p could not get frame " + "header for frame index %d, status %x\n", + __func__, stp_req, frame_index, status); + return status; + } + + switch (frame_header->fis_type) { + case FIS_PIO_SETUP: + /* Get from the frame buffer the PIO Setup Data */ + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&frame_buffer); + + /* Get the data from the PIO Setup The SCU Hardware + * returns first word in the frame_header and the rest + * of the data is in the frame buffer so we need to + * back up one dword + */ + + /* transfer_count: first 16bits in the 4th dword */ + stp_req->pio_len = frame_buffer[3] & 0xffff; + + /* status: 4th byte in the 3rd dword */ + stp_req->status = (frame_buffer[2] >> 24) & 0xff; + + sci_controller_copy_sata_response(&ireq->stp.rsp, + frame_header, + frame_buffer); + + ireq->stp.rsp.status = stp_req->status; + + /* The next state is dependent on whether the + * request was PIO Data-in or Data out + */ + if (task->data_dir == DMA_FROM_DEVICE) { + sci_change_state(&ireq->sm, SCI_REQ_STP_PIO_DATA_IN); + } else if (task->data_dir == DMA_TO_DEVICE) { + /* Transmit data */ + status = sci_stp_request_pio_data_out_transmit_data(ireq); + if (status != SCI_SUCCESS) + break; + sci_change_state(&ireq->sm, SCI_REQ_STP_PIO_DATA_OUT); + } + break; + + case FIS_SETDEVBITS: + sci_change_state(&ireq->sm, SCI_REQ_STP_PIO_WAIT_FRAME); + break; + + case FIS_REGD2H: + if (frame_header->status & ATA_BUSY) { + /* + * Now why is the drive sending a D2H Register + * FIS when it is still busy? Do nothing since + * we are still in the right state. + */ + dev_dbg(&ihost->pdev->dev, + "%s: SCIC PIO Request 0x%p received " + "D2H Register FIS with BSY status " + "0x%x\n", + __func__, + stp_req, + frame_header->status); + break; + } + + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&frame_buffer); + + sci_controller_copy_sata_response(&ireq->stp.req, + frame_header, + frame_buffer); + + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + + default: + /* FIXME: what do we do here? */ + break; + } + + /* Frame is decoded return it to the controller */ + sci_controller_release_frame(ihost, frame_index); + + return status; + } + + case SCI_REQ_STP_PIO_DATA_IN: { + struct dev_to_host_fis *frame_header; + struct sata_fis_data *frame_buffer; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_header); + + if (status != SCI_SUCCESS) { + dev_err(&ihost->pdev->dev, + "%s: SCIC IO Request 0x%p could not get frame " + "header for frame index %d, status %x\n", + __func__, + stp_req, + frame_index, + status); + return status; + } + + if (frame_header->fis_type != FIS_DATA) { + dev_err(&ihost->pdev->dev, + "%s: SCIC PIO Request 0x%p received frame %d " + "with fis type 0x%02x when expecting a data " + "fis.\n", + __func__, + stp_req, + frame_index, + frame_header->fis_type); + + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_FAILURE_IO_REQUIRES_SCSI_ABORT; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + + /* Frame is decoded return it to the controller */ + sci_controller_release_frame(ihost, frame_index); + return status; + } + + if (stp_req->sgl.index < 0) { + ireq->saved_rx_frame_index = frame_index; + stp_req->pio_len = 0; + } else { + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&frame_buffer); + + status = sci_stp_request_pio_data_in_copy_data(stp_req, + (u8 *)frame_buffer); + + /* Frame is decoded return it to the controller */ + sci_controller_release_frame(ihost, frame_index); + } + + /* Check for the end of the transfer, are there more + * bytes remaining for this data transfer + */ + if (status != SCI_SUCCESS || stp_req->pio_len != 0) + return status; + + if ((stp_req->status & ATA_BUSY) == 0) { + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + } else { + sci_change_state(&ireq->sm, SCI_REQ_STP_PIO_WAIT_FRAME); + } + return status; + } + + case SCI_REQ_STP_SOFT_RESET_WAIT_D2H: { + struct dev_to_host_fis *frame_header; + u32 *frame_buffer; + + status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, + frame_index, + (void **)&frame_header); + if (status != SCI_SUCCESS) { + dev_err(&ihost->pdev->dev, + "%s: SCIC IO Request 0x%p could not get frame " + "header for frame index %d, status %x\n", + __func__, + stp_req, + frame_index, + status); + return status; + } + + switch (frame_header->fis_type) { + case FIS_REGD2H: + sci_unsolicited_frame_control_get_buffer(&ihost->uf_control, + frame_index, + (void **)&frame_buffer); + + sci_controller_copy_sata_response(&ireq->stp.rsp, + frame_header, + frame_buffer); + + /* The command has completed with error */ + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + break; + + default: + dev_warn(&ihost->pdev->dev, + "%s: IO Request:0x%p Frame Id:%d protocol " + "violation occurred\n", + __func__, + stp_req, + frame_index); + + ireq->scu_status = SCU_TASK_DONE_UNEXP_FIS; + ireq->sci_status = SCI_FAILURE_PROTOCOL_VIOLATION; + break; + } + + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + + /* Frame has been decoded return it to the controller */ + sci_controller_release_frame(ihost, frame_index); + + return status; + } + case SCI_REQ_ABORTING: + /* + * TODO: Is it even possible to get an unsolicited frame in the + * aborting state? + */ + sci_controller_release_frame(ihost, frame_index); + return SCI_SUCCESS; + + default: + dev_warn(&ihost->pdev->dev, + "%s: SCIC IO Request given unexpected frame %x while " + "in state %d\n", + __func__, + frame_index, + state); + + sci_controller_release_frame(ihost, frame_index); + return SCI_FAILURE_INVALID_STATE; + } +} + +static enum sci_status stp_request_udma_await_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + enum sci_status status = SCI_SUCCESS; + + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_FIS): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR): + /* We must check ther response buffer to see if the D2H + * Register FIS was received before we got the TC + * completion. + */ + if (ireq->stp.rsp.fis_type == FIS_REGD2H) { + sci_remote_device_suspend(ireq->target_device, + SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code))); + + ireq->scu_status = SCU_TASK_DONE_CHECK_RESPONSE; + ireq->sci_status = SCI_FAILURE_IO_RESPONSE_VALID; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + } else { + /* If we have an error completion status for the + * TC then we can expect a D2H register FIS from + * the device so we must change state to wait + * for it + */ + sci_change_state(&ireq->sm, SCI_REQ_STP_UDMA_WAIT_D2H); + } + break; + + /* TODO Check to see if any of these completion status need to + * wait for the device to host register fis. + */ + /* TODO We can retry the command for SCU_TASK_DONE_CMD_LL_R_ERR + * - this comes only for B0 + */ + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_INV_FIS_LEN): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_R_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CMD_LL_R_ERR): + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CRC_ERR): + sci_remote_device_suspend(ireq->target_device, + SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code))); + /* Fall through to the default case */ + default: + /* All other completion status cause the IO to be complete. */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return status; +} + +static enum sci_status +stp_request_soft_reset_await_h2d_asserted_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG); + break; + + default: + /* + * All other completion status cause the IO to be complete. + * If a NAK was received, then it is up to the user to retry + * the request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return SCI_SUCCESS; +} + +static enum sci_status +stp_request_soft_reset_await_h2d_diagnostic_tc_event(struct isci_request *ireq, + u32 completion_code) +{ + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + ireq->scu_status = SCU_TASK_DONE_GOOD; + ireq->sci_status = SCI_SUCCESS; + sci_change_state(&ireq->sm, SCI_REQ_STP_SOFT_RESET_WAIT_D2H); + break; + + default: + /* All other completion status cause the IO to be complete. If + * a NAK was received, then it is up to the user to retry the + * request. + */ + ireq->scu_status = SCU_NORMALIZE_COMPLETION_STATUS(completion_code); + ireq->sci_status = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR; + sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); + break; + } + + return SCI_SUCCESS; +} + +enum sci_status +sci_io_request_tc_completion(struct isci_request *ireq, + u32 completion_code) +{ + enum sci_base_request_states state; + struct isci_host *ihost = ireq->owning_controller; + + state = ireq->sm.current_state_id; + + switch (state) { + case SCI_REQ_STARTED: + return request_started_state_tc_event(ireq, completion_code); + + case SCI_REQ_TASK_WAIT_TC_COMP: + return ssp_task_request_await_tc_event(ireq, + completion_code); + + case SCI_REQ_SMP_WAIT_RESP: + return smp_request_await_response_tc_event(ireq, + completion_code); + + case SCI_REQ_SMP_WAIT_TC_COMP: + return smp_request_await_tc_event(ireq, completion_code); + + case SCI_REQ_STP_UDMA_WAIT_TC_COMP: + return stp_request_udma_await_tc_event(ireq, + completion_code); + + case SCI_REQ_STP_NON_DATA_WAIT_H2D: + return stp_request_non_data_await_h2d_tc_event(ireq, + completion_code); + + case SCI_REQ_STP_PIO_WAIT_H2D: + return stp_request_pio_await_h2d_completion_tc_event(ireq, + completion_code); + + case SCI_REQ_STP_PIO_DATA_OUT: + return pio_data_out_tx_done_tc_event(ireq, completion_code); + + case SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED: + return stp_request_soft_reset_await_h2d_asserted_tc_event(ireq, + completion_code); + + case SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG: + return stp_request_soft_reset_await_h2d_diagnostic_tc_event(ireq, + completion_code); + + case SCI_REQ_ABORTING: + return request_aborting_state_tc_event(ireq, + completion_code); + + default: + dev_warn(&ihost->pdev->dev, + "%s: SCIC IO Request given task completion " + "notification %x while in wrong state %d\n", + __func__, + completion_code, + state); + return SCI_FAILURE_INVALID_STATE; + } +} + +/** + * isci_request_process_response_iu() - This function sets the status and + * response iu, in the task struct, from the request object for the upper + * layer driver. + * @sas_task: This parameter is the task struct from the upper layer driver. + * @resp_iu: This parameter points to the response iu of the completed request. + * @dev: This parameter specifies the linux device struct. + * + * none. + */ +static void isci_request_process_response_iu( + struct sas_task *task, + struct ssp_response_iu *resp_iu, + struct device *dev) +{ + dev_dbg(dev, + "%s: resp_iu = %p " + "resp_iu->status = 0x%x,\nresp_iu->datapres = %d " + "resp_iu->response_data_len = %x, " + "resp_iu->sense_data_len = %x\nrepsonse data: ", + __func__, + resp_iu, + resp_iu->status, + resp_iu->datapres, + resp_iu->response_data_len, + resp_iu->sense_data_len); + + task->task_status.stat = resp_iu->status; + + /* libsas updates the task status fields based on the response iu. */ + sas_ssp_task_response(dev, task, resp_iu); +} + +/** + * isci_request_set_open_reject_status() - This function prepares the I/O + * completion for OPEN_REJECT conditions. + * @request: This parameter is the completed isci_request object. + * @response_ptr: This parameter specifies the service response for the I/O. + * @status_ptr: This parameter specifies the exec status for the I/O. + * @complete_to_host_ptr: This parameter specifies the action to be taken by + * the LLDD with respect to completing this request or forcing an abort + * condition on the I/O. + * @open_rej_reason: This parameter specifies the encoded reason for the + * abandon-class reject. + * + * none. + */ +static void isci_request_set_open_reject_status( + struct isci_request *request, + struct sas_task *task, + enum service_response *response_ptr, + enum exec_status *status_ptr, + enum isci_completion_selection *complete_to_host_ptr, + enum sas_open_rej_reason open_rej_reason) +{ + /* Task in the target is done. */ + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + *response_ptr = SAS_TASK_UNDELIVERED; + *status_ptr = SAS_OPEN_REJECT; + *complete_to_host_ptr = isci_perform_normal_io_completion; + task->task_status.open_rej_reason = open_rej_reason; +} + +/** + * isci_request_handle_controller_specific_errors() - This function decodes + * controller-specific I/O completion error conditions. + * @request: This parameter is the completed isci_request object. + * @response_ptr: This parameter specifies the service response for the I/O. + * @status_ptr: This parameter specifies the exec status for the I/O. + * @complete_to_host_ptr: This parameter specifies the action to be taken by + * the LLDD with respect to completing this request or forcing an abort + * condition on the I/O. + * + * none. + */ +static void isci_request_handle_controller_specific_errors( + struct isci_remote_device *idev, + struct isci_request *request, + struct sas_task *task, + enum service_response *response_ptr, + enum exec_status *status_ptr, + enum isci_completion_selection *complete_to_host_ptr) +{ + unsigned int cstatus; + + cstatus = request->scu_status; + + dev_dbg(&request->isci_host->pdev->dev, + "%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR " + "- controller status = 0x%x\n", + __func__, request, cstatus); + + /* Decode the controller-specific errors; most + * important is to recognize those conditions in which + * the target may still have a task outstanding that + * must be aborted. + * + * Note that there are SCU completion codes being + * named in the decode below for which SCIC has already + * done work to handle them in a way other than as + * a controller-specific completion code; these are left + * in the decode below for completeness sake. + */ + switch (cstatus) { + case SCU_TASK_DONE_DMASETUP_DIRERR: + /* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */ + case SCU_TASK_DONE_XFERCNT_ERR: + /* Also SCU_TASK_DONE_SMP_UFI_ERR: */ + if (task->task_proto == SAS_PROTOCOL_SMP) { + /* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */ + *response_ptr = SAS_TASK_COMPLETE; + + /* See if the device has been/is being stopped. Note + * that we ignore the quiesce state, since we are + * concerned about the actual device state. + */ + if (!idev) + *status_ptr = SAS_DEVICE_UNKNOWN; + else + *status_ptr = SAS_ABORTED_TASK; + + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + + *complete_to_host_ptr = + isci_perform_normal_io_completion; + } else { + /* Task in the target is not done. */ + *response_ptr = SAS_TASK_UNDELIVERED; + + if (!idev) + *status_ptr = SAS_DEVICE_UNKNOWN; + else + *status_ptr = SAM_STAT_TASK_ABORTED; + + clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + + *complete_to_host_ptr = + isci_perform_error_io_completion; + } + + break; + + case SCU_TASK_DONE_CRC_ERR: + case SCU_TASK_DONE_NAK_CMD_ERR: + case SCU_TASK_DONE_EXCESS_DATA: + case SCU_TASK_DONE_UNEXP_FIS: + /* Also SCU_TASK_DONE_UNEXP_RESP: */ + case SCU_TASK_DONE_VIIT_ENTRY_NV: /* TODO - conditions? */ + case SCU_TASK_DONE_IIT_ENTRY_NV: /* TODO - conditions? */ + case SCU_TASK_DONE_RNCNV_OUTBOUND: /* TODO - conditions? */ + /* These are conditions in which the target + * has completed the task, so that no cleanup + * is necessary. + */ + *response_ptr = SAS_TASK_COMPLETE; + + /* See if the device has been/is being stopped. Note + * that we ignore the quiesce state, since we are + * concerned about the actual device state. + */ + if (!idev) + *status_ptr = SAS_DEVICE_UNKNOWN; + else + *status_ptr = SAS_ABORTED_TASK; + + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + + *complete_to_host_ptr = isci_perform_normal_io_completion; + break; + + + /* Note that the only open reject completion codes seen here will be + * abandon-class codes; all others are automatically retried in the SCU. + */ + case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_WRONG_DEST); + break; + + case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION: + + /* Note - the return of AB0 will change when + * libsas implements detection of zone violations. + */ + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_RESV_AB0); + break; + + case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_RESV_AB1); + break; + + case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_RESV_AB2); + break; + + case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_RESV_AB3); + break; + + case SCU_TASK_OPEN_REJECT_BAD_DESTINATION: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_BAD_DEST); + break; + + case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_STP_NORES); + break; + + case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_EPROTO); + break; + + case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED: + + isci_request_set_open_reject_status( + request, task, response_ptr, status_ptr, + complete_to_host_ptr, SAS_OREJ_CONN_RATE); + break; + + case SCU_TASK_DONE_LL_R_ERR: + /* Also SCU_TASK_DONE_ACK_NAK_TO: */ + case SCU_TASK_DONE_LL_PERR: + case SCU_TASK_DONE_LL_SY_TERM: + /* Also SCU_TASK_DONE_NAK_ERR:*/ + case SCU_TASK_DONE_LL_LF_TERM: + /* Also SCU_TASK_DONE_DATA_LEN_ERR: */ + case SCU_TASK_DONE_LL_ABORT_ERR: + case SCU_TASK_DONE_SEQ_INV_TYPE: + /* Also SCU_TASK_DONE_UNEXP_XR: */ + case SCU_TASK_DONE_XR_IU_LEN_ERR: + case SCU_TASK_DONE_INV_FIS_LEN: + /* Also SCU_TASK_DONE_XR_WD_LEN: */ + case SCU_TASK_DONE_SDMA_ERR: + case SCU_TASK_DONE_OFFSET_ERR: + case SCU_TASK_DONE_MAX_PLD_ERR: + case SCU_TASK_DONE_LF_ERR: + case SCU_TASK_DONE_SMP_RESP_TO_ERR: /* Escalate to dev reset? */ + case SCU_TASK_DONE_SMP_LL_RX_ERR: + case SCU_TASK_DONE_UNEXP_DATA: + case SCU_TASK_DONE_UNEXP_SDBFIS: + case SCU_TASK_DONE_REG_ERR: + case SCU_TASK_DONE_SDB_ERR: + case SCU_TASK_DONE_TASK_ABORT: + default: + /* Task in the target is not done. */ + *response_ptr = SAS_TASK_UNDELIVERED; + *status_ptr = SAM_STAT_TASK_ABORTED; + + if (task->task_proto == SAS_PROTOCOL_SMP) { + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + + *complete_to_host_ptr = isci_perform_normal_io_completion; + } else { + clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + + *complete_to_host_ptr = isci_perform_error_io_completion; + } + break; + } +} + +/** + * isci_task_save_for_upper_layer_completion() - This function saves the + * request for later completion to the upper layer driver. + * @host: This parameter is a pointer to the host on which the the request + * should be queued (either as an error or success). + * @request: This parameter is the completed request. + * @response: This parameter is the response code for the completed task. + * @status: This parameter is the status code for the completed task. + * + * none. + */ +static void isci_task_save_for_upper_layer_completion( + struct isci_host *host, + struct isci_request *request, + enum service_response response, + enum exec_status status, + enum isci_completion_selection task_notification_selection) +{ + struct sas_task *task = isci_request_access_task(request); + + task_notification_selection + = isci_task_set_completion_status(task, response, status, + task_notification_selection); + + /* Tasks aborted specifically by a call to the lldd_abort_task + * function should not be completed to the host in the regular path. + */ + switch (task_notification_selection) { + + case isci_perform_normal_io_completion: + + /* Normal notification (task_done) */ + dev_dbg(&host->pdev->dev, + "%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n", + __func__, + task, + task->task_status.resp, response, + task->task_status.stat, status); + /* Add to the completed list. */ + list_add(&request->completed_node, + &host->requests_to_complete); + + /* Take the request off the device's pending request list. */ + list_del_init(&request->dev_node); + break; + + case isci_perform_aborted_io_completion: + /* No notification to libsas because this request is + * already in the abort path. + */ + dev_dbg(&host->pdev->dev, + "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n", + __func__, + task, + task->task_status.resp, response, + task->task_status.stat, status); + + /* Wake up whatever process was waiting for this + * request to complete. + */ + WARN_ON(request->io_request_completion == NULL); + + if (request->io_request_completion != NULL) { + + /* Signal whoever is waiting that this + * request is complete. + */ + complete(request->io_request_completion); + } + break; + + case isci_perform_error_io_completion: + /* Use sas_task_abort */ + dev_dbg(&host->pdev->dev, + "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n", + __func__, + task, + task->task_status.resp, response, + task->task_status.stat, status); + /* Add to the aborted list. */ + list_add(&request->completed_node, + &host->requests_to_errorback); + break; + + default: + dev_dbg(&host->pdev->dev, + "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n", + __func__, + task, + task->task_status.resp, response, + task->task_status.stat, status); + + /* Add to the error to libsas list. */ + list_add(&request->completed_node, + &host->requests_to_errorback); + break; + } +} + +static void isci_request_process_stp_response(struct sas_task *task, + void *response_buffer) +{ + struct dev_to_host_fis *d2h_reg_fis = response_buffer; + struct task_status_struct *ts = &task->task_status; + struct ata_task_resp *resp = (void *)&ts->buf[0]; + + resp->frame_len = le16_to_cpu(*(__le16 *)(response_buffer + 6)); + memcpy(&resp->ending_fis[0], response_buffer + 16, 24); + ts->buf_valid_size = sizeof(*resp); + + /** + * If the device fault bit is set in the status register, then + * set the sense data and return. + */ + if (d2h_reg_fis->status & ATA_DF) + ts->stat = SAS_PROTO_RESPONSE; + else + ts->stat = SAM_STAT_GOOD; + + ts->resp = SAS_TASK_COMPLETE; +} + +static void isci_request_io_request_complete(struct isci_host *ihost, + struct isci_request *request, + enum sci_io_status completion_status) +{ + struct sas_task *task = isci_request_access_task(request); + struct ssp_response_iu *resp_iu; + void *resp_buf; + unsigned long task_flags; + struct isci_remote_device *idev = isci_lookup_device(task->dev); + enum service_response response = SAS_TASK_UNDELIVERED; + enum exec_status status = SAS_ABORTED_TASK; + enum isci_request_status request_status; + enum isci_completion_selection complete_to_host + = isci_perform_normal_io_completion; + + dev_dbg(&ihost->pdev->dev, + "%s: request = %p, task = %p,\n" + "task->data_dir = %d completion_status = 0x%x\n", + __func__, + request, + task, + task->data_dir, + completion_status); + + spin_lock(&request->state_lock); + request_status = request->status; + + /* Decode the request status. Note that if the request has been + * aborted by a task management function, we don't care + * what the status is. + */ + switch (request_status) { + + case aborted: + /* "aborted" indicates that the request was aborted by a task + * management function, since once a task management request is + * perfomed by the device, the request only completes because + * of the subsequent driver terminate. + * + * Aborted also means an external thread is explicitly managing + * this request, so that we do not complete it up the stack. + * + * The target is still there (since the TMF was successful). + */ + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + response = SAS_TASK_COMPLETE; + + /* See if the device has been/is being stopped. Note + * that we ignore the quiesce state, since we are + * concerned about the actual device state. + */ + if (!idev) + status = SAS_DEVICE_UNKNOWN; + else + status = SAS_ABORTED_TASK; + + complete_to_host = isci_perform_aborted_io_completion; + /* This was an aborted request. */ + + spin_unlock(&request->state_lock); + break; + + case aborting: + /* aborting means that the task management function tried and + * failed to abort the request. We need to note the request + * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the + * target as down. + * + * Aborting also means an external thread is explicitly managing + * this request, so that we do not complete it up the stack. + */ + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + response = SAS_TASK_UNDELIVERED; + + if (!idev) + /* The device has been /is being stopped. Note that + * we ignore the quiesce state, since we are + * concerned about the actual device state. + */ + status = SAS_DEVICE_UNKNOWN; + else + status = SAS_PHY_DOWN; + + complete_to_host = isci_perform_aborted_io_completion; + + /* This was an aborted request. */ + + spin_unlock(&request->state_lock); + break; + + case terminating: + + /* This was an terminated request. This happens when + * the I/O is being terminated because of an action on + * the device (reset, tear down, etc.), and the I/O needs + * to be completed up the stack. + */ + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + response = SAS_TASK_UNDELIVERED; + + /* See if the device has been/is being stopped. Note + * that we ignore the quiesce state, since we are + * concerned about the actual device state. + */ + if (!idev) + status = SAS_DEVICE_UNKNOWN; + else + status = SAS_ABORTED_TASK; + + complete_to_host = isci_perform_aborted_io_completion; + + /* This was a terminated request. */ + + spin_unlock(&request->state_lock); + break; + + case dead: + /* This was a terminated request that timed-out during the + * termination process. There is no task to complete to + * libsas. + */ + complete_to_host = isci_perform_normal_io_completion; + spin_unlock(&request->state_lock); + break; + + default: + + /* The request is done from an SCU HW perspective. */ + request->status = completed; + + spin_unlock(&request->state_lock); + + /* This is an active request being completed from the core. */ + switch (completion_status) { + + case SCI_IO_FAILURE_RESPONSE_VALID: + dev_dbg(&ihost->pdev->dev, + "%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n", + __func__, + request, + task); + + if (sas_protocol_ata(task->task_proto)) { + resp_buf = &request->stp.rsp; + isci_request_process_stp_response(task, + resp_buf); + } else if (SAS_PROTOCOL_SSP == task->task_proto) { + + /* crack the iu response buffer. */ + resp_iu = &request->ssp.rsp; + isci_request_process_response_iu(task, resp_iu, + &ihost->pdev->dev); + + } else if (SAS_PROTOCOL_SMP == task->task_proto) { + + dev_err(&ihost->pdev->dev, + "%s: SCI_IO_FAILURE_RESPONSE_VALID: " + "SAS_PROTOCOL_SMP protocol\n", + __func__); + + } else + dev_err(&ihost->pdev->dev, + "%s: unknown protocol\n", __func__); + + /* use the task status set in the task struct by the + * isci_request_process_response_iu call. + */ + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + response = task->task_status.resp; + status = task->task_status.stat; + break; + + case SCI_IO_SUCCESS: + case SCI_IO_SUCCESS_IO_DONE_EARLY: + + response = SAS_TASK_COMPLETE; + status = SAM_STAT_GOOD; + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + + if (task->task_proto == SAS_PROTOCOL_SMP) { + void *rsp = &request->smp.rsp; + + dev_dbg(&ihost->pdev->dev, + "%s: SMP protocol completion\n", + __func__); + + sg_copy_from_buffer( + &task->smp_task.smp_resp, 1, + rsp, sizeof(struct smp_resp)); + } else if (completion_status + == SCI_IO_SUCCESS_IO_DONE_EARLY) { + + /* This was an SSP / STP / SATA transfer. + * There is a possibility that less data than + * the maximum was transferred. + */ + u32 transferred_length = sci_req_tx_bytes(request); + + task->task_status.residual + = task->total_xfer_len - transferred_length; + + /* If there were residual bytes, call this an + * underrun. + */ + if (task->task_status.residual != 0) + status = SAS_DATA_UNDERRUN; + + dev_dbg(&ihost->pdev->dev, + "%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n", + __func__, + status); + + } else + dev_dbg(&ihost->pdev->dev, + "%s: SCI_IO_SUCCESS\n", + __func__); + + break; + + case SCI_IO_FAILURE_TERMINATED: + dev_dbg(&ihost->pdev->dev, + "%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n", + __func__, + request, + task); + + /* The request was terminated explicitly. No handling + * is needed in the SCSI error handler path. + */ + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + response = SAS_TASK_UNDELIVERED; + + /* See if the device has been/is being stopped. Note + * that we ignore the quiesce state, since we are + * concerned about the actual device state. + */ + if (!idev) + status = SAS_DEVICE_UNKNOWN; + else + status = SAS_ABORTED_TASK; + + complete_to_host = isci_perform_normal_io_completion; + break; + + case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR: + + isci_request_handle_controller_specific_errors( + idev, request, task, &response, &status, + &complete_to_host); + + break; + + case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED: + /* This is a special case, in that the I/O completion + * is telling us that the device needs a reset. + * In order for the device reset condition to be + * noticed, the I/O has to be handled in the error + * handler. Set the reset flag and cause the + * SCSI error thread to be scheduled. + */ + spin_lock_irqsave(&task->task_state_lock, task_flags); + task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; + spin_unlock_irqrestore(&task->task_state_lock, task_flags); + + /* Fail the I/O. */ + response = SAS_TASK_UNDELIVERED; + status = SAM_STAT_TASK_ABORTED; + + complete_to_host = isci_perform_error_io_completion; + clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + break; + + case SCI_FAILURE_RETRY_REQUIRED: + + /* Fail the I/O so it can be retried. */ + response = SAS_TASK_UNDELIVERED; + if (!idev) + status = SAS_DEVICE_UNKNOWN; + else + status = SAS_ABORTED_TASK; + + complete_to_host = isci_perform_normal_io_completion; + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + break; + + + default: + /* Catch any otherwise unhandled error codes here. */ + dev_dbg(&ihost->pdev->dev, + "%s: invalid completion code: 0x%x - " + "isci_request = %p\n", + __func__, completion_status, request); + + response = SAS_TASK_UNDELIVERED; + + /* See if the device has been/is being stopped. Note + * that we ignore the quiesce state, since we are + * concerned about the actual device state. + */ + if (!idev) + status = SAS_DEVICE_UNKNOWN; + else + status = SAS_ABORTED_TASK; + + if (SAS_PROTOCOL_SMP == task->task_proto) { + set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + complete_to_host = isci_perform_normal_io_completion; + } else { + clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags); + complete_to_host = isci_perform_error_io_completion; + } + break; + } + break; + } + + switch (task->task_proto) { + case SAS_PROTOCOL_SSP: + if (task->data_dir == DMA_NONE) + break; + if (task->num_scatter == 0) + /* 0 indicates a single dma address */ + dma_unmap_single(&ihost->pdev->dev, + request->zero_scatter_daddr, + task->total_xfer_len, task->data_dir); + else /* unmap the sgl dma addresses */ + dma_unmap_sg(&ihost->pdev->dev, task->scatter, + request->num_sg_entries, task->data_dir); + break; + case SAS_PROTOCOL_SMP: { + struct scatterlist *sg = &task->smp_task.smp_req; + struct smp_req *smp_req; + void *kaddr; + + dma_unmap_sg(&ihost->pdev->dev, sg, 1, DMA_TO_DEVICE); + + /* need to swab it back in case the command buffer is re-used */ + kaddr = kmap_atomic(sg_page(sg), KM_IRQ0); + smp_req = kaddr + sg->offset; + sci_swab32_cpy(smp_req, smp_req, sg->length / sizeof(u32)); + kunmap_atomic(kaddr, KM_IRQ0); + break; + } + default: + break; + } + + /* Put the completed request on the correct list */ + isci_task_save_for_upper_layer_completion(ihost, request, response, + status, complete_to_host + ); + + /* complete the io request to the core. */ + sci_controller_complete_io(ihost, request->target_device, request); + isci_put_device(idev); + + /* set terminated handle so it cannot be completed or + * terminated again, and to cause any calls into abort + * task to recognize the already completed case. + */ + set_bit(IREQ_TERMINATED, &request->flags); +} + +static void sci_request_started_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); + struct domain_device *dev = ireq->target_device->domain_dev; + struct sas_task *task; + + /* XXX as hch said always creating an internal sas_task for tmf + * requests would simplify the driver + */ + task = ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL; + + /* all unaccelerated request types (non ssp or ncq) handled with + * substates + */ + if (!task && dev->dev_type == SAS_END_DEV) { + sci_change_state(sm, SCI_REQ_TASK_WAIT_TC_COMP); + } else if (!task && + (isci_request_access_tmf(ireq)->tmf_code == isci_tmf_sata_srst_high || + isci_request_access_tmf(ireq)->tmf_code == isci_tmf_sata_srst_low)) { + sci_change_state(sm, SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED); + } else if (task && task->task_proto == SAS_PROTOCOL_SMP) { + sci_change_state(sm, SCI_REQ_SMP_WAIT_RESP); + } else if (task && sas_protocol_ata(task->task_proto) && + !task->ata_task.use_ncq) { + u32 state; + + if (task->data_dir == DMA_NONE) + state = SCI_REQ_STP_NON_DATA_WAIT_H2D; + else if (task->ata_task.dma_xfer) + state = SCI_REQ_STP_UDMA_WAIT_TC_COMP; + else /* PIO */ + state = SCI_REQ_STP_PIO_WAIT_H2D; + + sci_change_state(sm, state); + } +} + +static void sci_request_completed_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); + struct isci_host *ihost = ireq->owning_controller; + + /* Tell the SCI_USER that the IO request is complete */ + if (!test_bit(IREQ_TMF, &ireq->flags)) + isci_request_io_request_complete(ihost, ireq, + ireq->sci_status); + else + isci_task_request_complete(ihost, ireq, ireq->sci_status); +} + +static void sci_request_aborting_state_enter(struct sci_base_state_machine *sm) +{ + struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); + + /* Setting the abort bit in the Task Context is required by the silicon. */ + ireq->tc->abort = 1; +} + +static void sci_stp_request_started_non_data_await_h2d_completion_enter(struct sci_base_state_machine *sm) +{ + struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); + + ireq->target_device->working_request = ireq; +} + +static void sci_stp_request_started_pio_await_h2d_completion_enter(struct sci_base_state_machine *sm) +{ + struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); + + ireq->target_device->working_request = ireq; +} + +static void sci_stp_request_started_soft_reset_await_h2d_asserted_completion_enter(struct sci_base_state_machine *sm) +{ + struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); + + ireq->target_device->working_request = ireq; +} + +static void sci_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter(struct sci_base_state_machine *sm) +{ + struct isci_request *ireq = container_of(sm, typeof(*ireq), sm); + struct scu_task_context *tc = ireq->tc; + struct host_to_dev_fis *h2d_fis; + enum sci_status status; + + /* Clear the SRST bit */ + h2d_fis = &ireq->stp.cmd; + h2d_fis->control = 0; + + /* Clear the TC control bit */ + tc->control_frame = 0; + + status = sci_controller_continue_io(ireq); + WARN_ONCE(status != SCI_SUCCESS, "isci: continue io failure\n"); +} + +static const struct sci_base_state sci_request_state_table[] = { + [SCI_REQ_INIT] = { }, + [SCI_REQ_CONSTRUCTED] = { }, + [SCI_REQ_STARTED] = { + .enter_state = sci_request_started_state_enter, + }, + [SCI_REQ_STP_NON_DATA_WAIT_H2D] = { + .enter_state = sci_stp_request_started_non_data_await_h2d_completion_enter, + }, + [SCI_REQ_STP_NON_DATA_WAIT_D2H] = { }, + [SCI_REQ_STP_PIO_WAIT_H2D] = { + .enter_state = sci_stp_request_started_pio_await_h2d_completion_enter, + }, + [SCI_REQ_STP_PIO_WAIT_FRAME] = { }, + [SCI_REQ_STP_PIO_DATA_IN] = { }, + [SCI_REQ_STP_PIO_DATA_OUT] = { }, + [SCI_REQ_STP_UDMA_WAIT_TC_COMP] = { }, + [SCI_REQ_STP_UDMA_WAIT_D2H] = { }, + [SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED] = { + .enter_state = sci_stp_request_started_soft_reset_await_h2d_asserted_completion_enter, + }, + [SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG] = { + .enter_state = sci_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter, + }, + [SCI_REQ_STP_SOFT_RESET_WAIT_D2H] = { }, + [SCI_REQ_TASK_WAIT_TC_COMP] = { }, + [SCI_REQ_TASK_WAIT_TC_RESP] = { }, + [SCI_REQ_SMP_WAIT_RESP] = { }, + [SCI_REQ_SMP_WAIT_TC_COMP] = { }, + [SCI_REQ_COMPLETED] = { + .enter_state = sci_request_completed_state_enter, + }, + [SCI_REQ_ABORTING] = { + .enter_state = sci_request_aborting_state_enter, + }, + [SCI_REQ_FINAL] = { }, +}; + +static void +sci_general_request_construct(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + sci_init_sm(&ireq->sm, sci_request_state_table, SCI_REQ_INIT); + + ireq->target_device = idev; + ireq->protocol = SCIC_NO_PROTOCOL; + ireq->saved_rx_frame_index = SCU_INVALID_FRAME_INDEX; + + ireq->sci_status = SCI_SUCCESS; + ireq->scu_status = 0; + ireq->post_context = 0xFFFFFFFF; +} + +static enum sci_status +sci_io_request_construct(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *ireq) +{ + struct domain_device *dev = idev->domain_dev; + enum sci_status status = SCI_SUCCESS; + + /* Build the common part of the request */ + sci_general_request_construct(ihost, idev, ireq); + + if (idev->rnc.remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) + return SCI_FAILURE_INVALID_REMOTE_DEVICE; + + if (dev->dev_type == SAS_END_DEV) + /* pass */; + else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) + memset(&ireq->stp.cmd, 0, sizeof(ireq->stp.cmd)); + else if (dev_is_expander(dev)) + /* pass */; + else + return SCI_FAILURE_UNSUPPORTED_PROTOCOL; + + memset(ireq->tc, 0, offsetof(struct scu_task_context, sgl_pair_ab)); + + return status; +} + +enum sci_status sci_task_request_construct(struct isci_host *ihost, + struct isci_remote_device *idev, + u16 io_tag, struct isci_request *ireq) +{ + struct domain_device *dev = idev->domain_dev; + enum sci_status status = SCI_SUCCESS; + + /* Build the common part of the request */ + sci_general_request_construct(ihost, idev, ireq); + + if (dev->dev_type == SAS_END_DEV || + dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { + set_bit(IREQ_TMF, &ireq->flags); + memset(ireq->tc, 0, sizeof(struct scu_task_context)); + } else + status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; + + return status; +} + +static enum sci_status isci_request_ssp_request_construct( + struct isci_request *request) +{ + enum sci_status status; + + dev_dbg(&request->isci_host->pdev->dev, + "%s: request = %p\n", + __func__, + request); + status = sci_io_request_construct_basic_ssp(request); + return status; +} + +static enum sci_status isci_request_stp_request_construct(struct isci_request *ireq) +{ + struct sas_task *task = isci_request_access_task(ireq); + struct host_to_dev_fis *fis = &ireq->stp.cmd; + struct ata_queued_cmd *qc = task->uldd_task; + enum sci_status status; + + dev_dbg(&ireq->isci_host->pdev->dev, + "%s: ireq = %p\n", + __func__, + ireq); + + memcpy(fis, &task->ata_task.fis, sizeof(struct host_to_dev_fis)); + if (!task->ata_task.device_control_reg_update) + fis->flags |= 0x80; + fis->flags &= 0xF0; + + status = sci_io_request_construct_basic_sata(ireq); + + if (qc && (qc->tf.command == ATA_CMD_FPDMA_WRITE || + qc->tf.command == ATA_CMD_FPDMA_READ)) { + fis->sector_count = qc->tag << 3; + ireq->tc->type.stp.ncq_tag = qc->tag; + } + + return status; +} + +static enum sci_status +sci_io_request_construct_smp(struct device *dev, + struct isci_request *ireq, + struct sas_task *task) +{ + struct scatterlist *sg = &task->smp_task.smp_req; + struct isci_remote_device *idev; + struct scu_task_context *task_context; + struct isci_port *iport; + struct smp_req *smp_req; + void *kaddr; + u8 req_len; + u32 cmd; + + kaddr = kmap_atomic(sg_page(sg), KM_IRQ0); + smp_req = kaddr + sg->offset; + /* + * Look at the SMP requests' header fields; for certain SAS 1.x SMP + * functions under SAS 2.0, a zero request length really indicates + * a non-zero default length. + */ + if (smp_req->req_len == 0) { + switch (smp_req->func) { + case SMP_DISCOVER: + case SMP_REPORT_PHY_ERR_LOG: + case SMP_REPORT_PHY_SATA: + case SMP_REPORT_ROUTE_INFO: + smp_req->req_len = 2; + break; + case SMP_CONF_ROUTE_INFO: + case SMP_PHY_CONTROL: + case SMP_PHY_TEST_FUNCTION: + smp_req->req_len = 9; + break; + /* Default - zero is a valid default for 2.0. */ + } + } + req_len = smp_req->req_len; + sci_swab32_cpy(smp_req, smp_req, sg->length / sizeof(u32)); + cmd = *(u32 *) smp_req; + kunmap_atomic(kaddr, KM_IRQ0); + + if (!dma_map_sg(dev, sg, 1, DMA_TO_DEVICE)) + return SCI_FAILURE; + + ireq->protocol = SCIC_SMP_PROTOCOL; + + /* byte swap the smp request. */ + + task_context = ireq->tc; + + idev = ireq->target_device; + iport = idev->owning_port; + + /* + * Fill in the TC with the its required data + * 00h + */ + task_context->priority = 0; + task_context->initiator_request = 1; + task_context->connection_rate = idev->connection_rate; + task_context->protocol_engine_index = ISCI_PEG; + task_context->logical_port_index = iport->physical_port_index; + task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SMP; + task_context->abort = 0; + task_context->valid = SCU_TASK_CONTEXT_VALID; + task_context->context_type = SCU_TASK_CONTEXT_TYPE; + + /* 04h */ + task_context->remote_node_index = idev->rnc.remote_node_index; + task_context->command_code = 0; + task_context->task_type = SCU_TASK_TYPE_SMP_REQUEST; + + /* 08h */ + task_context->link_layer_control = 0; + task_context->do_not_dma_ssp_good_response = 1; + task_context->strict_ordering = 0; + task_context->control_frame = 1; + task_context->timeout_enable = 0; + task_context->block_guard_enable = 0; + + /* 0ch */ + task_context->address_modifier = 0; + + /* 10h */ + task_context->ssp_command_iu_length = req_len; + + /* 14h */ + task_context->transfer_length_bytes = 0; + + /* + * 18h ~ 30h, protocol specific + * since commandIU has been build by framework at this point, we just + * copy the frist DWord from command IU to this location. */ + memcpy(&task_context->type.smp, &cmd, sizeof(u32)); + + /* + * 40h + * "For SMP you could program it to zero. We would prefer that way + * so that done code will be consistent." - Venki + */ + task_context->task_phase = 0; + + ireq->post_context = (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + (ISCI_PEG << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | + (iport->physical_port_index << + SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | + ISCI_TAG_TCI(ireq->io_tag)); + /* + * Copy the physical address for the command buffer to the SCU Task + * Context command buffer should not contain command header. + */ + task_context->command_iu_upper = upper_32_bits(sg_dma_address(sg)); + task_context->command_iu_lower = lower_32_bits(sg_dma_address(sg) + sizeof(u32)); + + /* SMP response comes as UF, so no need to set response IU address. */ + task_context->response_iu_upper = 0; + task_context->response_iu_lower = 0; + + sci_change_state(&ireq->sm, SCI_REQ_CONSTRUCTED); + + return SCI_SUCCESS; +} + +/* + * isci_smp_request_build() - This function builds the smp request. + * @ireq: This parameter points to the isci_request allocated in the + * request construct function. + * + * SCI_SUCCESS on successfull completion, or specific failure code. + */ +static enum sci_status isci_smp_request_build(struct isci_request *ireq) +{ + struct sas_task *task = isci_request_access_task(ireq); + struct device *dev = &ireq->isci_host->pdev->dev; + enum sci_status status = SCI_FAILURE; + + status = sci_io_request_construct_smp(dev, ireq, task); + if (status != SCI_SUCCESS) + dev_dbg(&ireq->isci_host->pdev->dev, + "%s: failed with status = %d\n", + __func__, + status); + + return status; +} + +/** + * isci_io_request_build() - This function builds the io request object. + * @ihost: This parameter specifies the ISCI host object + * @request: This parameter points to the isci_request object allocated in the + * request construct function. + * @sci_device: This parameter is the handle for the sci core's remote device + * object that is the destination for this request. + * + * SCI_SUCCESS on successfull completion, or specific failure code. + */ +static enum sci_status isci_io_request_build(struct isci_host *ihost, + struct isci_request *request, + struct isci_remote_device *idev) +{ + enum sci_status status = SCI_SUCCESS; + struct sas_task *task = isci_request_access_task(request); + + dev_dbg(&ihost->pdev->dev, + "%s: idev = 0x%p; request = %p, " + "num_scatter = %d\n", + __func__, + idev, + request, + task->num_scatter); + + /* map the sgl addresses, if present. + * libata does the mapping for sata devices + * before we get the request. + */ + if (task->num_scatter && + !sas_protocol_ata(task->task_proto) && + !(SAS_PROTOCOL_SMP & task->task_proto)) { + + request->num_sg_entries = dma_map_sg( + &ihost->pdev->dev, + task->scatter, + task->num_scatter, + task->data_dir + ); + + if (request->num_sg_entries == 0) + return SCI_FAILURE_INSUFFICIENT_RESOURCES; + } + + status = sci_io_request_construct(ihost, idev, request); + + if (status != SCI_SUCCESS) { + dev_dbg(&ihost->pdev->dev, + "%s: failed request construct\n", + __func__); + return SCI_FAILURE; + } + + switch (task->task_proto) { + case SAS_PROTOCOL_SMP: + status = isci_smp_request_build(request); + break; + case SAS_PROTOCOL_SSP: + status = isci_request_ssp_request_construct(request); + break; + case SAS_PROTOCOL_SATA: + case SAS_PROTOCOL_STP: + case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: + status = isci_request_stp_request_construct(request); + break; + default: + dev_dbg(&ihost->pdev->dev, + "%s: unknown protocol\n", __func__); + return SCI_FAILURE; + } + + return SCI_SUCCESS; +} + +static struct isci_request *isci_request_from_tag(struct isci_host *ihost, u16 tag) +{ + struct isci_request *ireq; + + ireq = ihost->reqs[ISCI_TAG_TCI(tag)]; + ireq->io_tag = tag; + ireq->io_request_completion = NULL; + ireq->flags = 0; + ireq->num_sg_entries = 0; + INIT_LIST_HEAD(&ireq->completed_node); + INIT_LIST_HEAD(&ireq->dev_node); + isci_request_change_state(ireq, allocated); + + return ireq; +} + +static struct isci_request *isci_io_request_from_tag(struct isci_host *ihost, + struct sas_task *task, + u16 tag) +{ + struct isci_request *ireq; + + ireq = isci_request_from_tag(ihost, tag); + ireq->ttype_ptr.io_task_ptr = task; + ireq->ttype = io_task; + task->lldd_task = ireq; + + return ireq; +} + +struct isci_request *isci_tmf_request_from_tag(struct isci_host *ihost, + struct isci_tmf *isci_tmf, + u16 tag) +{ + struct isci_request *ireq; + + ireq = isci_request_from_tag(ihost, tag); + ireq->ttype_ptr.tmf_task_ptr = isci_tmf; + ireq->ttype = tmf_task; + + return ireq; +} + +int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *idev, + struct sas_task *task, u16 tag) +{ + enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; + struct isci_request *ireq; + unsigned long flags; + int ret = 0; + + /* do common allocation and init of request object. */ + ireq = isci_io_request_from_tag(ihost, task, tag); + + status = isci_io_request_build(ihost, ireq, idev); + if (status != SCI_SUCCESS) { + dev_dbg(&ihost->pdev->dev, + "%s: request_construct failed - status = 0x%x\n", + __func__, + status); + return status; + } + + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (test_bit(IDEV_IO_NCQERROR, &idev->flags)) { + + if (isci_task_is_ncq_recovery(task)) { + + /* The device is in an NCQ recovery state. Issue the + * request on the task side. Note that it will + * complete on the I/O request side because the + * request was built that way (ie. + * ireq->is_task_management_request is false). + */ + status = sci_controller_start_task(ihost, + idev, + ireq); + } else { + status = SCI_FAILURE; + } + } else { + /* send the request, let the core assign the IO TAG. */ + status = sci_controller_start_io(ihost, idev, + ireq); + } + + if (status != SCI_SUCCESS && + status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { + dev_dbg(&ihost->pdev->dev, + "%s: failed request start (0x%x)\n", + __func__, status); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + return status; + } + + /* Either I/O started OK, or the core has signaled that + * the device needs a target reset. + * + * In either case, hold onto the I/O for later. + * + * Update it's status and add it to the list in the + * remote device object. + */ + list_add(&ireq->dev_node, &idev->reqs_in_process); + + if (status == SCI_SUCCESS) { + isci_request_change_state(ireq, started); + } else { + /* The request did not really start in the + * hardware, so clear the request handle + * here so no terminations will be done. + */ + set_bit(IREQ_TERMINATED, &ireq->flags); + isci_request_change_state(ireq, completed); + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (status == + SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { + /* Signal libsas that we need the SCSI error + * handler thread to work on this I/O and that + * we want a device reset. + */ + spin_lock_irqsave(&task->task_state_lock, flags); + task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; + spin_unlock_irqrestore(&task->task_state_lock, flags); + + /* Cause this task to be scheduled in the SCSI error + * handler thread. + */ + isci_execpath_callback(ihost, task, + sas_task_abort); + + /* Change the status, since we are holding + * the I/O until it is managed by the SCSI + * error handler. + */ + status = SCI_SUCCESS; + } + + return ret; +} diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h new file mode 100644 index 000000000000..7a1d5a9778eb --- /dev/null +++ b/drivers/scsi/isci/request.h @@ -0,0 +1,448 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _ISCI_REQUEST_H_ +#define _ISCI_REQUEST_H_ + +#include "isci.h" +#include "host.h" +#include "scu_task_context.h" + +/** + * struct isci_request_status - This enum defines the possible states of an I/O + * request. + * + * + */ +enum isci_request_status { + unallocated = 0x00, + allocated = 0x01, + started = 0x02, + completed = 0x03, + aborting = 0x04, + aborted = 0x05, + terminating = 0x06, + dead = 0x07 +}; + +enum task_type { + io_task = 0, + tmf_task = 1 +}; + +enum sci_request_protocol { + SCIC_NO_PROTOCOL, + SCIC_SMP_PROTOCOL, + SCIC_SSP_PROTOCOL, + SCIC_STP_PROTOCOL +}; /* XXX remove me, use sas_task.{dev|task_proto} instead */; + +/** + * isci_stp_request - extra request infrastructure to handle pio/atapi protocol + * @pio_len - number of bytes requested at PIO setup + * @status - pio setup ending status value to tell us if we need + * to wait for another fis or if the transfer is complete. Upon + * receipt of a d2h fis this will be the status field of that fis. + * @sgl - track pio transfer progress as we iterate through the sgl + * @device_cdb_len - atapi device advertises it's transfer constraints at setup + */ +struct isci_stp_request { + u32 pio_len; + u8 status; + + struct isci_stp_pio_sgl { + int index; + u8 set; + u32 offset; + } sgl; + u32 device_cdb_len; +}; + +struct isci_request { + enum isci_request_status status; + #define IREQ_COMPLETE_IN_TARGET 0 + #define IREQ_TERMINATED 1 + #define IREQ_TMF 2 + #define IREQ_ACTIVE 3 + unsigned long flags; + /* XXX kill ttype and ttype_ptr, allocate full sas_task */ + enum task_type ttype; + union ttype_ptr_union { + struct sas_task *io_task_ptr; /* When ttype==io_task */ + struct isci_tmf *tmf_task_ptr; /* When ttype==tmf_task */ + } ttype_ptr; + struct isci_host *isci_host; + /* For use in the requests_to_{complete|abort} lists: */ + struct list_head completed_node; + /* For use in the reqs_in_process list: */ + struct list_head dev_node; + spinlock_t state_lock; + dma_addr_t request_daddr; + dma_addr_t zero_scatter_daddr; + unsigned int num_sg_entries; + /* Note: "io_request_completion" is completed in two different ways + * depending on whether this is a TMF or regular request. + * - TMF requests are completed in the thread that started them; + * - regular requests are completed in the request completion callback + * function. + * This difference in operation allows the aborter of a TMF request + * to be sure that once the TMF request completes, the I/O that the + * TMF was aborting is guaranteed to have completed. + * + * XXX kill io_request_completion + */ + struct completion *io_request_completion; + struct sci_base_state_machine sm; + struct isci_host *owning_controller; + struct isci_remote_device *target_device; + u16 io_tag; + enum sci_request_protocol protocol; + u32 scu_status; /* hardware result */ + u32 sci_status; /* upper layer disposition */ + u32 post_context; + struct scu_task_context *tc; + /* could be larger with sg chaining */ + #define SCU_SGL_SIZE ((SCI_MAX_SCATTER_GATHER_ELEMENTS + 1) / 2) + struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32))); + /* This field is a pointer to the stored rx frame data. It is used in + * STP internal requests and SMP response frames. If this field is + * non-NULL the saved frame must be released on IO request completion. + */ + u32 saved_rx_frame_index; + + union { + struct { + union { + struct ssp_cmd_iu cmd; + struct ssp_task_iu tmf; + }; + union { + struct ssp_response_iu rsp; + u8 rsp_buf[SSP_RESP_IU_MAX_SIZE]; + }; + } ssp; + struct { + struct smp_resp rsp; + } smp; + struct { + struct isci_stp_request req; + struct host_to_dev_fis cmd; + struct dev_to_host_fis rsp; + } stp; + }; +}; + +static inline struct isci_request *to_ireq(struct isci_stp_request *stp_req) +{ + struct isci_request *ireq; + + ireq = container_of(stp_req, typeof(*ireq), stp.req); + return ireq; +} + +/** + * enum sci_base_request_states - This enumeration depicts all the states for + * the common request state machine. + * + * + */ +enum sci_base_request_states { + /* + * Simply the initial state for the base request state machine. + */ + SCI_REQ_INIT, + + /* + * This state indicates that the request has been constructed. + * This state is entered from the INITIAL state. + */ + SCI_REQ_CONSTRUCTED, + + /* + * This state indicates that the request has been started. This state + * is entered from the CONSTRUCTED state. + */ + SCI_REQ_STARTED, + + SCI_REQ_STP_UDMA_WAIT_TC_COMP, + SCI_REQ_STP_UDMA_WAIT_D2H, + + SCI_REQ_STP_NON_DATA_WAIT_H2D, + SCI_REQ_STP_NON_DATA_WAIT_D2H, + + SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED, + SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG, + SCI_REQ_STP_SOFT_RESET_WAIT_D2H, + + /* + * While in this state the IO request object is waiting for the TC + * completion notification for the H2D Register FIS + */ + SCI_REQ_STP_PIO_WAIT_H2D, + + /* + * While in this state the IO request object is waiting for either a + * PIO Setup FIS or a D2H register FIS. The type of frame received is + * based on the result of the prior frame and line conditions. + */ + SCI_REQ_STP_PIO_WAIT_FRAME, + + /* + * While in this state the IO request object is waiting for a DATA + * frame from the device. + */ + SCI_REQ_STP_PIO_DATA_IN, + + /* + * While in this state the IO request object is waiting to transmit + * the next data frame to the device. + */ + SCI_REQ_STP_PIO_DATA_OUT, + + /* + * The AWAIT_TC_COMPLETION sub-state indicates that the started raw + * task management request is waiting for the transmission of the + * initial frame (i.e. command, task, etc.). + */ + SCI_REQ_TASK_WAIT_TC_COMP, + + /* + * This sub-state indicates that the started task management request + * is waiting for the reception of an unsolicited frame + * (i.e. response IU). + */ + SCI_REQ_TASK_WAIT_TC_RESP, + + /* + * This sub-state indicates that the started task management request + * is waiting for the reception of an unsolicited frame + * (i.e. response IU). + */ + SCI_REQ_SMP_WAIT_RESP, + + /* + * The AWAIT_TC_COMPLETION sub-state indicates that the started SMP + * request is waiting for the transmission of the initial frame + * (i.e. command, task, etc.). + */ + SCI_REQ_SMP_WAIT_TC_COMP, + + /* + * This state indicates that the request has completed. + * This state is entered from the STARTED state. This state is entered + * from the ABORTING state. + */ + SCI_REQ_COMPLETED, + + /* + * This state indicates that the request is in the process of being + * terminated/aborted. + * This state is entered from the CONSTRUCTED state. + * This state is entered from the STARTED state. + */ + SCI_REQ_ABORTING, + + /* + * Simply the final state for the base request state machine. + */ + SCI_REQ_FINAL, +}; + +enum sci_status sci_request_start(struct isci_request *ireq); +enum sci_status sci_io_request_terminate(struct isci_request *ireq); +enum sci_status +sci_io_request_event_handler(struct isci_request *ireq, + u32 event_code); +enum sci_status +sci_io_request_frame_handler(struct isci_request *ireq, + u32 frame_index); +enum sci_status +sci_task_request_terminate(struct isci_request *ireq); +extern enum sci_status +sci_request_complete(struct isci_request *ireq); +extern enum sci_status +sci_io_request_tc_completion(struct isci_request *ireq, u32 code); + +/* XXX open code in caller */ +static inline dma_addr_t +sci_io_request_get_dma_addr(struct isci_request *ireq, void *virt_addr) +{ + + char *requested_addr = (char *)virt_addr; + char *base_addr = (char *)ireq; + + BUG_ON(requested_addr < base_addr); + BUG_ON((requested_addr - base_addr) >= sizeof(*ireq)); + + return ireq->request_daddr + (requested_addr - base_addr); +} + +/** + * isci_request_change_state() - This function sets the status of the request + * object. + * @request: This parameter points to the isci_request object + * @status: This Parameter is the new status of the object + * + */ +static inline enum isci_request_status +isci_request_change_state(struct isci_request *isci_request, + enum isci_request_status status) +{ + enum isci_request_status old_state; + unsigned long flags; + + dev_dbg(&isci_request->isci_host->pdev->dev, + "%s: isci_request = %p, state = 0x%x\n", + __func__, + isci_request, + status); + + BUG_ON(isci_request == NULL); + + spin_lock_irqsave(&isci_request->state_lock, flags); + old_state = isci_request->status; + isci_request->status = status; + spin_unlock_irqrestore(&isci_request->state_lock, flags); + + return old_state; +} + +/** + * isci_request_change_started_to_newstate() - This function sets the status of + * the request object. + * @request: This parameter points to the isci_request object + * @status: This Parameter is the new status of the object + * + * state previous to any change. + */ +static inline enum isci_request_status +isci_request_change_started_to_newstate(struct isci_request *isci_request, + struct completion *completion_ptr, + enum isci_request_status newstate) +{ + enum isci_request_status old_state; + unsigned long flags; + + spin_lock_irqsave(&isci_request->state_lock, flags); + + old_state = isci_request->status; + + if (old_state == started || old_state == aborting) { + BUG_ON(isci_request->io_request_completion != NULL); + + isci_request->io_request_completion = completion_ptr; + isci_request->status = newstate; + } + + spin_unlock_irqrestore(&isci_request->state_lock, flags); + + dev_dbg(&isci_request->isci_host->pdev->dev, + "%s: isci_request = %p, old_state = 0x%x\n", + __func__, + isci_request, + old_state); + + return old_state; +} + +/** + * isci_request_change_started_to_aborted() - This function sets the status of + * the request object. + * @request: This parameter points to the isci_request object + * @completion_ptr: This parameter is saved as the kernel completion structure + * signalled when the old request completes. + * + * state previous to any change. + */ +static inline enum isci_request_status +isci_request_change_started_to_aborted(struct isci_request *isci_request, + struct completion *completion_ptr) +{ + return isci_request_change_started_to_newstate(isci_request, + completion_ptr, + aborted); +} + +#define isci_request_access_task(req) ((req)->ttype_ptr.io_task_ptr) + +#define isci_request_access_tmf(req) ((req)->ttype_ptr.tmf_task_ptr) + +struct isci_request *isci_tmf_request_from_tag(struct isci_host *ihost, + struct isci_tmf *isci_tmf, + u16 tag); +int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *idev, + struct sas_task *task, u16 tag); +void isci_terminate_pending_requests(struct isci_host *ihost, + struct isci_remote_device *idev); +enum sci_status +sci_task_request_construct(struct isci_host *ihost, + struct isci_remote_device *idev, + u16 io_tag, + struct isci_request *ireq); +enum sci_status +sci_task_request_construct_ssp(struct isci_request *ireq); +enum sci_status +sci_task_request_construct_sata(struct isci_request *ireq); +void sci_smp_request_copy_response(struct isci_request *ireq); + +static inline int isci_task_is_ncq_recovery(struct sas_task *task) +{ + return (sas_protocol_ata(task->task_proto) && + task->ata_task.fis.command == ATA_CMD_READ_LOG_EXT && + task->ata_task.fis.lbal == ATA_LOG_SATA_NCQ); + +} + +#endif /* !defined(_ISCI_REQUEST_H_) */ diff --git a/drivers/scsi/isci/sas.h b/drivers/scsi/isci/sas.h new file mode 100644 index 000000000000..462b15174d3f --- /dev/null +++ b/drivers/scsi/isci/sas.h @@ -0,0 +1,219 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCI_SAS_H_ +#define _SCI_SAS_H_ + +#include <linux/kernel.h> + +/* + * SATA FIS Types These constants depict the various SATA FIS types devined in + * the serial ATA specification. + * XXX: This needs to go into <scsi/sas.h> + */ +#define FIS_REGH2D 0x27 +#define FIS_REGD2H 0x34 +#define FIS_SETDEVBITS 0xA1 +#define FIS_DMA_ACTIVATE 0x39 +#define FIS_DMA_SETUP 0x41 +#define FIS_BIST_ACTIVATE 0x58 +#define FIS_PIO_SETUP 0x5F +#define FIS_DATA 0x46 + +/**************************************************************************/ +#define SSP_RESP_IU_MAX_SIZE 280 + +/* + * contents of the SSP COMMAND INFORMATION UNIT. + * For specific information on each of these individual fields please + * reference the SAS specification SSP transport layer section. + * XXX: This needs to go into <scsi/sas.h> + */ +struct ssp_cmd_iu { + u8 LUN[8]; + u8 add_cdb_len:6; + u8 _r_a:2; + u8 _r_b; + u8 en_fburst:1; + u8 task_prio:4; + u8 task_attr:3; + u8 _r_c; + + u8 cdb[16]; +} __packed; + +/* + * contents of the SSP TASK INFORMATION UNIT. + * For specific information on each of these individual fields please + * reference the SAS specification SSP transport layer section. + * XXX: This needs to go into <scsi/sas.h> + */ +struct ssp_task_iu { + u8 LUN[8]; + u8 _r_a; + u8 task_func; + u8 _r_b[4]; + u16 task_tag; + u8 _r_c[12]; +} __packed; + + +/* + * struct smp_req_phy_id - This structure defines the contents of + * an SMP Request that is comprised of the struct smp_request_header and a + * phy identifier. + * Examples: SMP_REQUEST_DISCOVER, SMP_REQUEST_REPORT_PHY_SATA. + * + * For specific information on each of these individual fields please reference + * the SAS specification. + */ +struct smp_req_phy_id { + u8 _r_a[4]; /* bytes 4-7 */ + + u8 ign_zone_grp:1; /* byte 8 */ + u8 _r_b:7; + + u8 phy_id; /* byte 9 */ + u8 _r_c; /* byte 10 */ + u8 _r_d; /* byte 11 */ +} __packed; + +/* + * struct smp_req_config_route_info - This structure defines the + * contents of an SMP Configure Route Information request. + * + * For specific information on each of these individual fields please reference + * the SAS specification. + */ +struct smp_req_conf_rtinfo { + u16 exp_change_cnt; /* bytes 4-5 */ + u8 exp_rt_idx_hi; /* byte 6 */ + u8 exp_rt_idx; /* byte 7 */ + + u8 _r_a; /* byte 8 */ + u8 phy_id; /* byte 9 */ + u16 _r_b; /* bytes 10-11 */ + + u8 _r_c:7; /* byte 12 */ + u8 dis_rt_entry:1; + u8 _r_d[3]; /* bytes 13-15 */ + + u8 rt_sas_addr[8]; /* bytes 16-23 */ + u8 _r_e[16]; /* bytes 24-39 */ +} __packed; + +/* + * struct smp_req_phycntl - This structure defines the contents of an + * SMP Phy Controller request. + * + * For specific information on each of these individual fields please reference + * the SAS specification. + */ +struct smp_req_phycntl { + u16 exp_change_cnt; /* byte 4-5 */ + + u8 _r_a[3]; /* bytes 6-8 */ + + u8 phy_id; /* byte 9 */ + u8 phy_op; /* byte 10 */ + + u8 upd_pathway:1; /* byte 11 */ + u8 _r_b:7; + + u8 _r_c[12]; /* byte 12-23 */ + + u8 att_dev_name[8]; /* byte 24-31 */ + + u8 _r_d:4; /* byte 32 */ + u8 min_linkrate:4; + + u8 _r_e:4; /* byte 33 */ + u8 max_linkrate:4; + + u8 _r_f[2]; /* byte 34-35 */ + + u8 pathway:4; /* byte 36 */ + u8 _r_g:4; + + u8 _r_h[3]; /* bytes 37-39 */ +} __packed; + +/* + * struct smp_req - This structure simply unionizes the existing request + * structures into a common request type. + * + * XXX: This data structure may need to go to scsi/sas.h + */ +struct smp_req { + u8 type; /* byte 0 */ + u8 func; /* byte 1 */ + u8 alloc_resp_len; /* byte 2 */ + u8 req_len; /* byte 3 */ + u8 req_data[0]; +} __packed; + +#define SMP_RESP_HDR_SZ 4 + +/* + * struct sci_sas_address - This structure depicts how a SAS address is + * represented by SCI. + * XXX convert this to u8 [SAS_ADDR_SIZE] like the rest of libsas + * + */ +struct sci_sas_address { + u32 high; + u32 low; +}; +#endif diff --git a/drivers/scsi/isci/scu_completion_codes.h b/drivers/scsi/isci/scu_completion_codes.h new file mode 100644 index 000000000000..c8b329c695f9 --- /dev/null +++ b/drivers/scsi/isci/scu_completion_codes.h @@ -0,0 +1,283 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCU_COMPLETION_CODES_HEADER_ +#define _SCU_COMPLETION_CODES_HEADER_ + +/** + * This file contains the constants and macros for the SCU hardware completion + * codes. + * + * + */ + +#define SCU_COMPLETION_TYPE_SHIFT 28 +#define SCU_COMPLETION_TYPE_MASK 0x70000000 + +/** + * SCU_COMPLETION_TYPE() - + * + * This macro constructs an SCU completion type + */ +#define SCU_COMPLETION_TYPE(type) \ + ((u32)(type) << SCU_COMPLETION_TYPE_SHIFT) + +/** + * SCU_COMPLETION_TYPE() - + * + * These macros contain the SCU completion types SCU_COMPLETION_TYPE + */ +#define SCU_COMPLETION_TYPE_TASK SCU_COMPLETION_TYPE(0) +#define SCU_COMPLETION_TYPE_SDMA SCU_COMPLETION_TYPE(1) +#define SCU_COMPLETION_TYPE_UFI SCU_COMPLETION_TYPE(2) +#define SCU_COMPLETION_TYPE_EVENT SCU_COMPLETION_TYPE(3) +#define SCU_COMPLETION_TYPE_NOTIFY SCU_COMPLETION_TYPE(4) + +/** + * + * + * These constants provide the shift and mask values for the various parts of + * an SCU completion code. + */ +#define SCU_COMPLETION_STATUS_MASK 0x0FFC0000 +#define SCU_COMPLETION_TL_STATUS_MASK 0x0FC00000 +#define SCU_COMPLETION_TL_STATUS_SHIFT 22 +#define SCU_COMPLETION_SDMA_STATUS_MASK 0x003C0000 +#define SCU_COMPLETION_PEG_MASK 0x00010000 +#define SCU_COMPLETION_PORT_MASK 0x00007000 +#define SCU_COMPLETION_PE_MASK SCU_COMPLETION_PORT_MASK +#define SCU_COMPLETION_PE_SHIFT 12 +#define SCU_COMPLETION_INDEX_MASK 0x00000FFF + +/** + * SCU_GET_COMPLETION_TYPE() - + * + * This macro returns the SCU completion type. + */ +#define SCU_GET_COMPLETION_TYPE(completion_code) \ + ((completion_code) & SCU_COMPLETION_TYPE_MASK) + +/** + * SCU_GET_COMPLETION_STATUS() - + * + * This macro returns the SCU completion status. + */ +#define SCU_GET_COMPLETION_STATUS(completion_code) \ + ((completion_code) & SCU_COMPLETION_STATUS_MASK) + +/** + * SCU_GET_COMPLETION_TL_STATUS() - + * + * This macro returns the transport layer completion status. + */ +#define SCU_GET_COMPLETION_TL_STATUS(completion_code) \ + ((completion_code) & SCU_COMPLETION_TL_STATUS_MASK) + +/** + * SCU_MAKE_COMPLETION_STATUS() - + * + * This macro takes a completion code and performs the shift and mask + * operations to turn it into a completion code that can be compared to a + * SCU_GET_COMPLETION_TL_STATUS. + */ +#define SCU_MAKE_COMPLETION_STATUS(completion_code) \ + ((u32)(completion_code) << SCU_COMPLETION_TL_STATUS_SHIFT) + +/** + * SCU_NORMALIZE_COMPLETION_STATUS() - + * + * This macro takes a SCU_GET_COMPLETION_TL_STATUS and normalizes it for a + * return code. + */ +#define SCU_NORMALIZE_COMPLETION_STATUS(completion_code) \ + (\ + ((completion_code) & SCU_COMPLETION_TL_STATUS_MASK) \ + >> SCU_COMPLETION_TL_STATUS_SHIFT \ + ) + +/** + * SCU_GET_COMPLETION_SDMA_STATUS() - + * + * This macro returns the SDMA completion status. + */ +#define SCU_GET_COMPLETION_SDMA_STATUS(completion_code) \ + ((completion_code) & SCU_COMPLETION_SDMA_STATUS_MASK) + +/** + * SCU_GET_COMPLETION_PEG() - + * + * This macro returns the Protocol Engine Group from the completion code. + */ +#define SCU_GET_COMPLETION_PEG(completion_code) \ + ((completion_code) & SCU_COMPLETION_PEG_MASK) + +/** + * SCU_GET_COMPLETION_PORT() - + * + * This macro reuturns the logical port index from the completion code. + */ +#define SCU_GET_COMPLETION_PORT(completion_code) \ + ((completion_code) & SCU_COMPLETION_PORT_MASK) + +/** + * SCU_GET_PROTOCOL_ENGINE_INDEX() - + * + * This macro returns the PE index from the completion code. + */ +#define SCU_GET_PROTOCOL_ENGINE_INDEX(completion_code) \ + (((completion_code) & SCU_COMPLETION_PE_MASK) >> SCU_COMPLETION_PE_SHIFT) + +/** + * SCU_GET_COMPLETION_INDEX() - + * + * This macro returns the index of the completion which is either a TCi or an + * RNi depending on the completion type. + */ +#define SCU_GET_COMPLETION_INDEX(completion_code) \ + ((completion_code) & SCU_COMPLETION_INDEX_MASK) + +#define SCU_UNSOLICITED_FRAME_MASK 0x0FFF0000 +#define SCU_UNSOLICITED_FRAME_SHIFT 16 + +/** + * SCU_GET_FRAME_INDEX() - + * + * This macro returns a normalized frame index from an unsolicited frame + * completion. + */ +#define SCU_GET_FRAME_INDEX(completion_code) \ + (\ + ((completion_code) & SCU_UNSOLICITED_FRAME_MASK) \ + >> SCU_UNSOLICITED_FRAME_SHIFT \ + ) + +#define SCU_UNSOLICITED_FRAME_ERROR_MASK 0x00008000 + +/** + * SCU_GET_FRAME_ERROR() - + * + * This macro returns a zero (0) value if there is no frame error otherwise it + * returns non-zero (!0). + */ +#define SCU_GET_FRAME_ERROR(completion_code) \ + ((completion_code) & SCU_UNSOLICITED_FRAME_ERROR_MASK) + +/** + * + * + * These constants represent normalized completion codes which must be shifted + * 18 bits to match it with the hardware completion code. In a 16-bit compiler, + * immediate constants are 16-bit values (the size of an int). If we shift + * those by 18 bits, we completely lose the value. To ensure the value is a + * 32-bit value like we want, each immediate value must be cast to a u32. + */ +#define SCU_TASK_DONE_GOOD ((u32)0x00) +#define SCU_TASK_DONE_CRC_ERR ((u32)0x14) +#define SCU_TASK_DONE_CHECK_RESPONSE ((u32)0x14) +#define SCU_TASK_DONE_GEN_RESPONSE ((u32)0x15) +#define SCU_TASK_DONE_NAK_CMD_ERR ((u32)0x16) +#define SCU_TASK_DONE_CMD_LL_R_ERR ((u32)0x16) +#define SCU_TASK_DONE_LL_R_ERR ((u32)0x17) +#define SCU_TASK_DONE_ACK_NAK_TO ((u32)0x17) +#define SCU_TASK_DONE_LL_PERR ((u32)0x18) +#define SCU_TASK_DONE_LL_SY_TERM ((u32)0x19) +#define SCU_TASK_DONE_NAK_ERR ((u32)0x19) +#define SCU_TASK_DONE_LL_LF_TERM ((u32)0x1A) +#define SCU_TASK_DONE_DATA_LEN_ERR ((u32)0x1A) +#define SCU_TASK_DONE_LL_CL_TERM ((u32)0x1B) +#define SCU_TASK_DONE_LL_ABORT_ERR ((u32)0x1B) +#define SCU_TASK_DONE_SEQ_INV_TYPE ((u32)0x1C) +#define SCU_TASK_DONE_UNEXP_XR ((u32)0x1C) +#define SCU_TASK_DONE_INV_FIS_TYPE ((u32)0x1D) +#define SCU_TASK_DONE_XR_IU_LEN_ERR ((u32)0x1D) +#define SCU_TASK_DONE_INV_FIS_LEN ((u32)0x1E) +#define SCU_TASK_DONE_XR_WD_LEN ((u32)0x1E) +#define SCU_TASK_DONE_SDMA_ERR ((u32)0x1F) +#define SCU_TASK_DONE_OFFSET_ERR ((u32)0x20) +#define SCU_TASK_DONE_MAX_PLD_ERR ((u32)0x21) +#define SCU_TASK_DONE_EXCESS_DATA ((u32)0x22) +#define SCU_TASK_DONE_LF_ERR ((u32)0x23) +#define SCU_TASK_DONE_UNEXP_FIS ((u32)0x24) +#define SCU_TASK_DONE_UNEXP_RESP ((u32)0x24) +#define SCU_TASK_DONE_EARLY_RESP ((u32)0x25) +#define SCU_TASK_DONE_SMP_RESP_TO_ERR ((u32)0x26) +#define SCU_TASK_DONE_DMASETUP_DIRERR ((u32)0x27) +#define SCU_TASK_DONE_SMP_UFI_ERR ((u32)0x27) +#define SCU_TASK_DONE_XFERCNT_ERR ((u32)0x28) +#define SCU_TASK_DONE_SMP_FRM_TYPE_ERR ((u32)0x28) +#define SCU_TASK_DONE_SMP_LL_RX_ERR ((u32)0x29) +#define SCU_TASK_DONE_RESP_LEN_ERR ((u32)0x2A) +#define SCU_TASK_DONE_UNEXP_DATA ((u32)0x2B) +#define SCU_TASK_DONE_OPEN_FAIL ((u32)0x2C) +#define SCU_TASK_DONE_UNEXP_SDBFIS ((u32)0x2D) +#define SCU_TASK_DONE_REG_ERR ((u32)0x2E) +#define SCU_TASK_DONE_SDB_ERR ((u32)0x2F) +#define SCU_TASK_DONE_TASK_ABORT ((u32)0x30) +#define SCU_TASK_DONE_CMD_SDMA_ERR ((U32)0x32) +#define SCU_TASK_DONE_CMD_LL_ABORT_ERR ((U32)0x33) +#define SCU_TASK_OPEN_REJECT_WRONG_DESTINATION ((u32)0x34) +#define SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1 ((u32)0x35) +#define SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2 ((u32)0x36) +#define SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3 ((u32)0x37) +#define SCU_TASK_OPEN_REJECT_BAD_DESTINATION ((u32)0x38) +#define SCU_TASK_OPEN_REJECT_ZONE_VIOLATION ((u32)0x39) +#define SCU_TASK_DONE_VIIT_ENTRY_NV ((u32)0x3A) +#define SCU_TASK_DONE_IIT_ENTRY_NV ((u32)0x3B) +#define SCU_TASK_DONE_RNCNV_OUTBOUND ((u32)0x3C) +#define SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY ((u32)0x3D) +#define SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED ((u32)0x3E) +#define SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED ((u32)0x3F) + +#endif /* _SCU_COMPLETION_CODES_HEADER_ */ diff --git a/drivers/scsi/isci/scu_event_codes.h b/drivers/scsi/isci/scu_event_codes.h new file mode 100644 index 000000000000..36a945ad5722 --- /dev/null +++ b/drivers/scsi/isci/scu_event_codes.h @@ -0,0 +1,336 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __SCU_EVENT_CODES_HEADER__ +#define __SCU_EVENT_CODES_HEADER__ + +/** + * This file contains the constants and macros for the SCU event codes. + * + * + */ + +#define SCU_EVENT_TYPE_CODE_SHIFT 24 +#define SCU_EVENT_TYPE_CODE_MASK 0x0F000000 + +#define SCU_EVENT_SPECIFIC_CODE_SHIFT 18 +#define SCU_EVENT_SPECIFIC_CODE_MASK 0x00FC0000 + +#define SCU_EVENT_CODE_MASK \ + (SCU_EVENT_TYPE_CODE_MASK | SCU_EVENT_SPECIFIC_CODE_MASK) + +/** + * SCU_EVENT_TYPE() - + * + * This macro constructs an SCU event type from the type value. + */ +#define SCU_EVENT_TYPE(type) \ + ((u32)(type) << SCU_EVENT_TYPE_CODE_SHIFT) + +/** + * SCU_EVENT_SPECIFIC() - + * + * This macro constructs an SCU event specifier from the code value. + */ +#define SCU_EVENT_SPECIFIC(code) \ + ((u32)(code) << SCU_EVENT_SPECIFIC_CODE_SHIFT) + +/** + * SCU_EVENT_MESSAGE() - + * + * This macro constructs a combines an SCU event type and SCU event specifier + * from the type and code values. + */ +#define SCU_EVENT_MESSAGE(type, code) \ + ((type) | SCU_EVENT_SPECIFIC(code)) + +/** + * SCU_EVENT_TYPE() - + * + * SCU_EVENT_TYPES + */ +#define SCU_EVENT_TYPE_SMU_COMMAND_ERROR SCU_EVENT_TYPE(0x08) +#define SCU_EVENT_TYPE_SMU_PCQ_ERROR SCU_EVENT_TYPE(0x09) +#define SCU_EVENT_TYPE_SMU_ERROR SCU_EVENT_TYPE(0x00) +#define SCU_EVENT_TYPE_TRANSPORT_ERROR SCU_EVENT_TYPE(0x01) +#define SCU_EVENT_TYPE_BROADCAST_CHANGE SCU_EVENT_TYPE(0x02) +#define SCU_EVENT_TYPE_OSSP_EVENT SCU_EVENT_TYPE(0x03) +#define SCU_EVENT_TYPE_FATAL_MEMORY_ERROR SCU_EVENT_TYPE(0x0F) +#define SCU_EVENT_TYPE_RNC_SUSPEND_TX SCU_EVENT_TYPE(0x04) +#define SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX SCU_EVENT_TYPE(0x05) +#define SCU_EVENT_TYPE_RNC_OPS_MISC SCU_EVENT_TYPE(0x06) +#define SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT SCU_EVENT_TYPE(0x07) +#define SCU_EVENT_TYPE_ERR_CNT_EVENT SCU_EVENT_TYPE(0x0A) + +/** + * + * + * SCU_EVENT_SPECIFIERS + */ +#define SCU_EVENT_SPECIFIER_DRIVER_SUSPEND 0x20 +#define SCU_EVENT_SPECIFIER_RNC_RELEASE 0x00 + +/** + * + * + * SMU_COMMAND_EVENTS + */ +#define SCU_EVENT_INVALID_CONTEXT_COMMAND \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_SMU_COMMAND_ERROR, 0x00) + +/** + * + * + * SMU_PCQ_EVENTS + */ +#define SCU_EVENT_UNCORRECTABLE_PCQ_ERROR \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_SMU_PCQ_ERROR, 0x00) + +/** + * + * + * SMU_EVENTS + */ +#define SCU_EVENT_UNCORRECTABLE_REGISTER_WRITE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_SMU_ERROR, 0x02) +#define SCU_EVENT_UNCORRECTABLE_REGISTER_READ \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_SMU_ERROR, 0x03) +#define SCU_EVENT_PCIE_INTERFACE_ERROR \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_SMU_ERROR, 0x04) +#define SCU_EVENT_FUNCTION_LEVEL_RESET \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_SMU_ERROR, 0x05) + +/** + * + * + * TRANSPORT_LEVEL_ERRORS + */ +#define SCU_EVENT_ACK_NAK_TIMEOUT_ERROR \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_TRANSPORT_ERROR, 0x00) + +/** + * + * + * BROADCAST_CHANGE_EVENTS + */ +#define SCU_EVENT_BROADCAST_CHANGE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x01) +#define SCU_EVENT_BROADCAST_RESERVED0 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x02) +#define SCU_EVENT_BROADCAST_RESERVED1 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x03) +#define SCU_EVENT_BROADCAST_SES \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x04) +#define SCU_EVENT_BROADCAST_EXPANDER \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x05) +#define SCU_EVENT_BROADCAST_AEN \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x06) +#define SCU_EVENT_BROADCAST_RESERVED3 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x07) +#define SCU_EVENT_BROADCAST_RESERVED4 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x08) +#define SCU_EVENT_PE_SUSPENDED \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_BROADCAST_CHANGE, 0x09) + +/** + * + * + * OSSP_EVENTS + */ +#define SCU_EVENT_PORT_SELECTOR_DETECTED \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x10) +#define SCU_EVENT_SENT_PORT_SELECTION \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x11) +#define SCU_EVENT_HARD_RESET_TRANSMITTED \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x12) +#define SCU_EVENT_HARD_RESET_RECEIVED \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x13) +#define SCU_EVENT_RECEIVED_IDENTIFY_TIMEOUT \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x15) +#define SCU_EVENT_LINK_FAILURE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x16) +#define SCU_EVENT_SATA_SPINUP_HOLD \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x17) +#define SCU_EVENT_SAS_15_SSC \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x18) +#define SCU_EVENT_SAS_15 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x19) +#define SCU_EVENT_SAS_30_SSC \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x1A) +#define SCU_EVENT_SAS_30 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x1B) +#define SCU_EVENT_SAS_60_SSC \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x1C) +#define SCU_EVENT_SAS_60 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x1D) +#define SCU_EVENT_SATA_15_SSC \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x1E) +#define SCU_EVENT_SATA_15 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x1F) +#define SCU_EVENT_SATA_30_SSC \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x20) +#define SCU_EVENT_SATA_30 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x21) +#define SCU_EVENT_SATA_60_SSC \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x22) +#define SCU_EVENT_SATA_60 \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x23) +#define SCU_EVENT_SAS_PHY_DETECTED \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x24) +#define SCU_EVENT_SATA_PHY_DETECTED \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_OSSP_EVENT, 0x25) + +/** + * + * + * FATAL_INTERNAL_MEMORY_ERROR_EVENTS + */ +#define SCU_EVENT_TSC_RNSC_UNCORRECTABLE_ERROR \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_FATAL_MEMORY_ERROR, 0x00) +#define SCU_EVENT_TC_RNC_UNCORRECTABLE_ERROR \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_FATAL_MEMORY_ERROR, 0x01) +#define SCU_EVENT_ZPT_UNCORRECTABLE_ERROR \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_FATAL_MEMORY_ERROR, 0x02) + +/** + * + * + * REMOTE_NODE_SUSPEND_EVENTS + */ +#define SCU_EVENT_TL_RNC_SUSPEND_TX \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_SUSPEND_TX, 0x00) +#define SCU_EVENT_TL_RNC_SUSPEND_TX_RX \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX, 0x00) +#define SCU_EVENT_DRIVER_POST_RNC_SUSPEND_TX \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_SUSPEND_TX, 0x20) +#define SCU_EVENT_DRIVER_POST_RNC_SUSPEND_TX_RX \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX, 0x20) + +/** + * + * + * REMOTE_NODE_MISC_EVENTS + */ +#define SCU_EVENT_POST_RCN_RELEASE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_OPS_MISC, SCU_EVENT_SPECIFIER_RNC_RELEASE) +#define SCU_EVENT_POST_IT_NEXUS_LOSS_TIMER_ENABLE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_OPS_MISC, 0x01) +#define SCU_EVENT_POST_IT_NEXUS_LOSS_TIMER_DISABLE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_OPS_MISC, 0x02) +#define SCU_EVENT_POST_RNC_COMPLETE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_OPS_MISC, 0x03) +#define SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_RNC_OPS_MISC, 0x04) + +/** + * + * + * ERROR_COUNT_EVENT + */ +#define SCU_EVENT_RX_CREDIT_BLOCKED_RECEIVED \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_ERR_CNT_EVENT, 0x00) +#define SCU_EVENT_TX_DONE_CREDIT_TIMEOUT \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_ERR_CNT_EVENT, 0x01) +#define SCU_EVENT_RX_DONE_CREDIT_TIMEOUT \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_ERR_CNT_EVENT, 0x02) + +/** + * scu_get_event_type() - + * + * This macro returns the SCU event type from the event code. + */ +#define scu_get_event_type(event_code) \ + ((event_code) & SCU_EVENT_TYPE_CODE_MASK) + +/** + * scu_get_event_specifier() - + * + * This macro returns the SCU event specifier from the event code. + */ +#define scu_get_event_specifier(event_code) \ + ((event_code) & SCU_EVENT_SPECIFIC_CODE_MASK) + +/** + * scu_get_event_code() - + * + * This macro returns the combined SCU event type and SCU event specifier from + * the event code. + */ +#define scu_get_event_code(event_code) \ + ((event_code) & SCU_EVENT_CODE_MASK) + + +/** + * + * + * PTS_SCHEDULE_EVENT + */ +#define SCU_EVENT_SMP_RESPONSE_NO_PE \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT, 0x00) +#define SCU_EVENT_SPECIFIC_SMP_RESPONSE_NO_PE \ + scu_get_event_specifier(SCU_EVENT_SMP_RESPONSE_NO_PE) + +#define SCU_EVENT_TASK_TIMEOUT \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT, 0x01) +#define SCU_EVENT_SPECIFIC_TASK_TIMEOUT \ + scu_get_event_specifier(SCU_EVENT_TASK_TIMEOUT) + +#define SCU_EVENT_IT_NEXUS_TIMEOUT \ + SCU_EVENT_MESSAGE(SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT, 0x02) +#define SCU_EVENT_SPECIFIC_IT_NEXUS_TIMEOUT \ + scu_get_event_specifier(SCU_EVENT_IT_NEXUS_TIMEOUT) + + +#endif /* __SCU_EVENT_CODES_HEADER__ */ diff --git a/drivers/scsi/isci/scu_remote_node_context.h b/drivers/scsi/isci/scu_remote_node_context.h new file mode 100644 index 000000000000..33745adc826b --- /dev/null +++ b/drivers/scsi/isci/scu_remote_node_context.h @@ -0,0 +1,229 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __SCU_REMOTE_NODE_CONTEXT_HEADER__ +#define __SCU_REMOTE_NODE_CONTEXT_HEADER__ + +/** + * This file contains the structures and constatns used by the SCU hardware to + * describe a remote node context. + * + * + */ + +/** + * struct ssp_remote_node_context - This structure contains the SCU hardware + * definition for an SSP remote node. + * + * + */ +struct ssp_remote_node_context { + /* WORD 0 */ + + /** + * This field is the remote node index assigned for this remote node. All + * remote nodes must have a unique remote node index. The value of the remote + * node index can not exceed the maximum number of remote nodes reported in + * the SCU device context capacity register. + */ + u32 remote_node_index:12; + u32 reserved0_1:4; + + /** + * This field tells the SCU hardware how many simultaneous connections that + * this remote node will support. + */ + u32 remote_node_port_width:4; + + /** + * This field tells the SCU hardware which logical port to associate with this + * remote node. + */ + u32 logical_port_index:3; + u32 reserved0_2:5; + + /** + * This field will enable the I_T nexus loss timer for this remote node. + */ + u32 nexus_loss_timer_enable:1; + + /** + * This field is the for driver debug only and is not used. + */ + u32 check_bit:1; + + /** + * This field must be set to true when the hardware DMAs the remote node + * context to the hardware SRAM. When the remote node is being invalidated + * this field must be set to false. + */ + u32 is_valid:1; + + /** + * This field must be set to true. + */ + u32 is_remote_node_context:1; + + /* WORD 1 - 2 */ + + /** + * This is the low word of the remote device SAS Address + */ + u32 remote_sas_address_lo; + + /** + * This field is the high word of the remote device SAS Address + */ + u32 remote_sas_address_hi; + + /* WORD 3 */ + /** + * This field reprensets the function number assigned to this remote device. + * This value must match the virtual function number that is being used to + * communicate to the device. + */ + u32 function_number:8; + u32 reserved3_1:8; + + /** + * This field provides the driver a way to cheat on the arbitration wait time + * for this remote node. + */ + u32 arbitration_wait_time:16; + + /* WORD 4 */ + /** + * This field tells the SCU hardware how long this device may occupy the + * connection before it must be closed. + */ + u32 connection_occupancy_timeout:16; + + /** + * This field tells the SCU hardware how long to maintain a connection when + * there are no frames being transmitted on the link. + */ + u32 connection_inactivity_timeout:16; + + /* WORD 5 */ + /** + * This field allows the driver to cheat on the arbitration wait time for this + * remote node. + */ + u32 initial_arbitration_wait_time:16; + + /** + * This field is tells the hardware what to program for the connection rate in + * the open address frame. See the SAS spec for valid values. + */ + u32 oaf_connection_rate:4; + + /** + * This field tells the SCU hardware what to program for the features in the + * open address frame. See the SAS spec for valid values. + */ + u32 oaf_features:4; + + /** + * This field tells the SCU hardware what to use for the source zone group in + * the open address frame. See the SAS spec for more details on zoning. + */ + u32 oaf_source_zone_group:8; + + /* WORD 6 */ + /** + * This field tells the SCU hardware what to use as the more capibilities in + * the open address frame. See the SAS Spec for details. + */ + u32 oaf_more_compatibility_features; + + /* WORD 7 */ + u32 reserved7; + +}; + +/** + * struct stp_remote_node_context - This structure contains the SCU hardware + * definition for a STP remote node. + * + * STP Targets are not yet supported so this definition is a placeholder until + * we do support them. + */ +struct stp_remote_node_context { + /** + * Placeholder data for the STP remote node. + */ + u32 data[8]; + +}; + +/** + * This union combines the SAS and SATA remote node definitions. + * + * union scu_remote_node_context + */ +union scu_remote_node_context { + /** + * SSP Remote Node + */ + struct ssp_remote_node_context ssp; + + /** + * STP Remote Node + */ + struct stp_remote_node_context stp; + +}; + +#endif /* __SCU_REMOTE_NODE_CONTEXT_HEADER__ */ diff --git a/drivers/scsi/isci/scu_task_context.h b/drivers/scsi/isci/scu_task_context.h new file mode 100644 index 000000000000..7df87d923285 --- /dev/null +++ b/drivers/scsi/isci/scu_task_context.h @@ -0,0 +1,942 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCU_TASK_CONTEXT_H_ +#define _SCU_TASK_CONTEXT_H_ + +/** + * This file contains the structures and constants for the SCU hardware task + * context. + * + * + */ + + +/** + * enum scu_ssp_task_type - This enumberation defines the various SSP task + * types the SCU hardware will accept. The definition for the various task + * types the SCU hardware will accept can be found in the DS specification. + * + * + */ +typedef enum { + SCU_TASK_TYPE_IOREAD, /* /< IO READ direction or no direction */ + SCU_TASK_TYPE_IOWRITE, /* /< IO Write direction */ + SCU_TASK_TYPE_SMP_REQUEST, /* /< SMP Request type */ + SCU_TASK_TYPE_RESPONSE, /* /< Driver generated response frame (targt mode) */ + SCU_TASK_TYPE_RAW_FRAME, /* /< Raw frame request type */ + SCU_TASK_TYPE_PRIMITIVE /* /< Request for a primitive to be transmitted */ +} scu_ssp_task_type; + +/** + * enum scu_sata_task_type - This enumeration defines the various SATA task + * types the SCU hardware will accept. The definition for the various task + * types the SCU hardware will accept can be found in the DS specification. + * + * + */ +typedef enum { + SCU_TASK_TYPE_DMA_IN, /* /< Read request */ + SCU_TASK_TYPE_FPDMAQ_READ, /* /< NCQ read request */ + SCU_TASK_TYPE_PACKET_DMA_IN, /* /< Packet read request */ + SCU_TASK_TYPE_SATA_RAW_FRAME, /* /< Raw frame request */ + RESERVED_4, + RESERVED_5, + RESERVED_6, + RESERVED_7, + SCU_TASK_TYPE_DMA_OUT, /* /< Write request */ + SCU_TASK_TYPE_FPDMAQ_WRITE, /* /< NCQ write Request */ + SCU_TASK_TYPE_PACKET_DMA_OUT /* /< Packet write request */ +} scu_sata_task_type; + + +/** + * + * + * SCU_CONTEXT_TYPE + */ +#define SCU_TASK_CONTEXT_TYPE 0 +#define SCU_RNC_CONTEXT_TYPE 1 + +/** + * + * + * SCU_TASK_CONTEXT_VALIDITY + */ +#define SCU_TASK_CONTEXT_INVALID 0 +#define SCU_TASK_CONTEXT_VALID 1 + +/** + * + * + * SCU_COMMAND_CODE + */ +#define SCU_COMMAND_CODE_INITIATOR_NEW_TASK 0 +#define SCU_COMMAND_CODE_ACTIVE_TASK 1 +#define SCU_COMMAND_CODE_PRIMITIVE_SEQ_TASK 2 +#define SCU_COMMAND_CODE_TARGET_RAW_FRAMES 3 + +/** + * + * + * SCU_TASK_PRIORITY + */ +/** + * + * + * This priority is used when there is no priority request for this request. + */ +#define SCU_TASK_PRIORITY_NORMAL 0 + +/** + * + * + * This priority indicates that the task should be scheduled to the head of the + * queue. The task will NOT be executed if the TX is suspended for the remote + * node. + */ +#define SCU_TASK_PRIORITY_HEAD_OF_Q 1 + +/** + * + * + * This priority indicates that the task will be executed before all + * SCU_TASK_PRIORITY_NORMAL and SCU_TASK_PRIORITY_HEAD_OF_Q tasks. The task + * WILL be executed if the TX is suspended for the remote node. + */ +#define SCU_TASK_PRIORITY_HIGH 2 + +/** + * + * + * This task priority is reserved and should not be used. + */ +#define SCU_TASK_PRIORITY_RESERVED 3 + +#define SCU_TASK_INITIATOR_MODE 1 +#define SCU_TASK_TARGET_MODE 0 + +#define SCU_TASK_REGULAR 0 +#define SCU_TASK_ABORTED 1 + +/* direction bit defintion */ +/** + * + * + * SATA_DIRECTION + */ +#define SCU_SATA_WRITE_DATA_DIRECTION 0 +#define SCU_SATA_READ_DATA_DIRECTION 1 + +/** + * + * + * SCU_COMMAND_CONTEXT_MACROS These macros provide the mask and shift + * operations to construct the various SCU commands + */ +#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_SHIFT 21 +#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_MASK 0x00E00000 +#define scu_get_command_request_type(x) \ + ((x) & SCU_CONTEXT_COMMAND_REQUEST_TYPE_MASK) + +#define SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_SHIFT 18 +#define SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_MASK 0x001C0000 +#define scu_get_command_request_subtype(x) \ + ((x) & SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_MASK) + +#define SCU_CONTEXT_COMMAND_REQUEST_FULLTYPE_MASK \ + (\ + SCU_CONTEXT_COMMAND_REQUEST_TYPE_MASK \ + | SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_MASK \ + ) +#define scu_get_command_request_full_type(x) \ + ((x) & SCU_CONTEXT_COMMAND_REQUEST_FULLTYPE_MASK) + +#define SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT 16 +#define SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_MASK 0x00010000 +#define scu_get_command_protocl_engine_group(x) \ + ((x) & SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_MASK) + +#define SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT 12 +#define SCU_CONTEXT_COMMAND_LOGICAL_PORT_MASK 0x00007000 +#define scu_get_command_reqeust_logical_port(x) \ + ((x) & SCU_CONTEXT_COMMAND_LOGICAL_PORT_MASK) + + +#define MAKE_SCU_CONTEXT_COMMAND_TYPE(type) \ + ((u32)(type) << SCU_CONTEXT_COMMAND_REQUEST_TYPE_SHIFT) + +/** + * MAKE_SCU_CONTEXT_COMMAND_TYPE() - + * + * SCU_COMMAND_TYPES These constants provide the grouping of the different SCU + * command types. + */ +#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC MAKE_SCU_CONTEXT_COMMAND_TYPE(0) +#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_TC MAKE_SCU_CONTEXT_COMMAND_TYPE(1) +#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC MAKE_SCU_CONTEXT_COMMAND_TYPE(2) +#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC MAKE_SCU_CONTEXT_COMMAND_TYPE(3) +#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC MAKE_SCU_CONTEXT_COMMAND_TYPE(6) + +#define MAKE_SCU_CONTEXT_COMMAND_REQUEST(type, command) \ + ((type) | ((command) << SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_SHIFT)) + +/** + * + * + * SCU_REQUEST_TYPES These constants are the various request types that can be + * posted to the SCU hardware. + */ +#define SCU_CONTEXT_COMMAND_REQUST_POST_TC \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC, 0)) + +#define SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC, 1)) + +#define SCU_CONTEXT_COMMAND_REQUST_DUMP_TC \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_TC, 0)) + +#define SCU_CONTEXT_COMMAND_POST_RNC_32 \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC, 0)) + +#define SCU_CONTEXT_COMMAND_POST_RNC_96 \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC, 1)) + +#define SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC, 2)) + +#define SCU_CONTEXT_COMMAND_DUMP_RNC_32 \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC, 0)) + +#define SCU_CONTEXT_COMMAND_DUMP_RNC_96 \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC, 1)) + +#define SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 0)) + +#define SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 1)) + +#define SCU_CONTEXT_COMMAND_POST_RNC_RESUME \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 2)) + +#define SCU_CONTEXT_IT_NEXUS_LOSS_TIMER_ENABLE \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 3)) + +#define SCU_CONTEXT_IT_NEXUS_LOSS_TIMER_DISABLE \ + (MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 4)) + +/** + * + * + * SCU_TASK_CONTEXT_PROTOCOL SCU Task context protocol types this is uesd to + * program the SCU Task context protocol field in word 0x00. + */ +#define SCU_TASK_CONTEXT_PROTOCOL_SMP 0x00 +#define SCU_TASK_CONTEXT_PROTOCOL_SSP 0x01 +#define SCU_TASK_CONTEXT_PROTOCOL_STP 0x02 +#define SCU_TASK_CONTEXT_PROTOCOL_NONE 0x07 + +/** + * struct ssp_task_context - This is the SCU hardware definition for an SSP + * request. + * + * + */ +struct ssp_task_context { + /* OFFSET 0x18 */ + u32 reserved00:24; + u32 frame_type:8; + + /* OFFSET 0x1C */ + u32 reserved01; + + /* OFFSET 0x20 */ + u32 fill_bytes:2; + u32 reserved02:6; + u32 changing_data_pointer:1; + u32 retransmit:1; + u32 retry_data_frame:1; + u32 tlr_control:2; + u32 reserved03:19; + + /* OFFSET 0x24 */ + u32 uiRsvd4; + + /* OFFSET 0x28 */ + u32 target_port_transfer_tag:16; + u32 tag:16; + + /* OFFSET 0x2C */ + u32 data_offset; +}; + +/** + * struct stp_task_context - This is the SCU hardware definition for an STP + * request. + * + * + */ +struct stp_task_context { + /* OFFSET 0x18 */ + u32 fis_type:8; + u32 pm_port:4; + u32 reserved0:3; + u32 control:1; + u32 command:8; + u32 features:8; + + /* OFFSET 0x1C */ + u32 reserved1; + + /* OFFSET 0x20 */ + u32 reserved2; + + /* OFFSET 0x24 */ + u32 reserved3; + + /* OFFSET 0x28 */ + u32 ncq_tag:5; + u32 reserved4:27; + + /* OFFSET 0x2C */ + u32 data_offset; /* TODO: What is this used for? */ +}; + +/** + * struct smp_task_context - This is the SCU hardware definition for an SMP + * request. + * + * + */ +struct smp_task_context { + /* OFFSET 0x18 */ + u32 response_length:8; + u32 function_result:8; + u32 function:8; + u32 frame_type:8; + + /* OFFSET 0x1C */ + u32 smp_response_ufi:12; + u32 reserved1:20; + + /* OFFSET 0x20 */ + u32 reserved2; + + /* OFFSET 0x24 */ + u32 reserved3; + + /* OFFSET 0x28 */ + u32 reserved4; + + /* OFFSET 0x2C */ + u32 reserved5; +}; + +/** + * struct primitive_task_context - This is the SCU hardware definition used + * when the driver wants to send a primitive on the link. + * + * + */ +struct primitive_task_context { + /* OFFSET 0x18 */ + /** + * This field is the control word and it must be 0. + */ + u32 control; /* /< must be set to 0 */ + + /* OFFSET 0x1C */ + /** + * This field specifies the primitive that is to be transmitted. + */ + u32 sequence; + + /* OFFSET 0x20 */ + u32 reserved0; + + /* OFFSET 0x24 */ + u32 reserved1; + + /* OFFSET 0x28 */ + u32 reserved2; + + /* OFFSET 0x2C */ + u32 reserved3; +}; + +/** + * The union of the protocols that can be selected in the SCU task context + * field. + * + * protocol_context + */ +union protocol_context { + struct ssp_task_context ssp; + struct stp_task_context stp; + struct smp_task_context smp; + struct primitive_task_context primitive; + u32 words[6]; +}; + +/** + * struct scu_sgl_element - This structure represents a single SCU defined SGL + * element. SCU SGLs contain a 64 bit address with the maximum data transfer + * being 24 bits in size. The SGL can not cross a 4GB boundary. + * + * struct scu_sgl_element + */ +struct scu_sgl_element { + /** + * This field is the upper 32 bits of the 64 bit physical address. + */ + u32 address_upper; + + /** + * This field is the lower 32 bits of the 64 bit physical address. + */ + u32 address_lower; + + /** + * This field is the number of bytes to transfer. + */ + u32 length:24; + + /** + * This field is the address modifier to be used when a virtual function is + * requesting a data transfer. + */ + u32 address_modifier:8; + +}; + +#define SCU_SGL_ELEMENT_PAIR_A 0 +#define SCU_SGL_ELEMENT_PAIR_B 1 + +/** + * struct scu_sgl_element_pair - This structure is the SCU hardware definition + * of a pair of SGL elements. The SCU hardware always works on SGL pairs. + * They are refered to in the DS specification as SGL A and SGL B. Each SGL + * pair is followed by the address of the next pair. + * + * + */ +struct scu_sgl_element_pair { + /* OFFSET 0x60-0x68 */ + /** + * This field is the SGL element A of the SGL pair. + */ + struct scu_sgl_element A; + + /* OFFSET 0x6C-0x74 */ + /** + * This field is the SGL element B of the SGL pair. + */ + struct scu_sgl_element B; + + /* OFFSET 0x78-0x7C */ + /** + * This field is the upper 32 bits of the 64 bit address to the next SGL + * element pair. + */ + u32 next_pair_upper; + + /** + * This field is the lower 32 bits of the 64 bit address to the next SGL + * element pair. + */ + u32 next_pair_lower; + +}; + +/** + * struct transport_snapshot - This structure is the SCU hardware scratch area + * for the task context. This is set to 0 by the driver but can be read by + * issuing a dump TC request to the SCU. + * + * + */ +struct transport_snapshot { + /* OFFSET 0x48 */ + u32 xfer_rdy_write_data_length; + + /* OFFSET 0x4C */ + u32 data_offset; + + /* OFFSET 0x50 */ + u32 data_transfer_size:24; + u32 reserved_50_0:8; + + /* OFFSET 0x54 */ + u32 next_initiator_write_data_offset; + + /* OFFSET 0x58 */ + u32 next_initiator_write_data_xfer_size:24; + u32 reserved_58_0:8; +}; + +/** + * struct scu_task_context - This structure defines the contents of the SCU + * silicon task context. It lays out all of the fields according to the + * expected order and location for the Storage Controller unit. + * + * + */ +struct scu_task_context { + /* OFFSET 0x00 ------ */ + /** + * This field must be encoded to one of the valid SCU task priority values + * - SCU_TASK_PRIORITY_NORMAL + * - SCU_TASK_PRIORITY_HEAD_OF_Q + * - SCU_TASK_PRIORITY_HIGH + */ + u32 priority:2; + + /** + * This field must be set to true if this is an initiator generated request. + * Until target mode is supported all task requests are initiator requests. + */ + u32 initiator_request:1; + + /** + * This field must be set to one of the valid connection rates valid values + * are 0x8, 0x9, and 0xA. + */ + u32 connection_rate:4; + + /** + * This field muse be programed when generating an SMP response since the SMP + * connection remains open until the SMP response is generated. + */ + u32 protocol_engine_index:3; + + /** + * This field must contain the logical port for the task request. + */ + u32 logical_port_index:3; + + /** + * This field must be set to one of the SCU_TASK_CONTEXT_PROTOCOL values + * - SCU_TASK_CONTEXT_PROTOCOL_SMP + * - SCU_TASK_CONTEXT_PROTOCOL_SSP + * - SCU_TASK_CONTEXT_PROTOCOL_STP + * - SCU_TASK_CONTEXT_PROTOCOL_NONE + */ + u32 protocol_type:3; + + /** + * This filed must be set to the TCi allocated for this task + */ + u32 task_index:12; + + /** + * This field is reserved and must be set to 0x00 + */ + u32 reserved_00_0:1; + + /** + * For a normal task request this must be set to 0. If this is an abort of + * this task request it must be set to 1. + */ + u32 abort:1; + + /** + * This field must be set to true for the SCU hardware to process the task. + */ + u32 valid:1; + + /** + * This field must be set to SCU_TASK_CONTEXT_TYPE + */ + u32 context_type:1; + + /* OFFSET 0x04 */ + /** + * This field contains the RNi that is the target of this request. + */ + u32 remote_node_index:12; + + /** + * This field is programmed if this is a mirrored request, which we are not + * using, in which case it is the RNi for the mirrored target. + */ + u32 mirrored_node_index:12; + + /** + * This field is programmed with the direction of the SATA reqeust + * - SCU_SATA_WRITE_DATA_DIRECTION + * - SCU_SATA_READ_DATA_DIRECTION + */ + u32 sata_direction:1; + + /** + * This field is programmsed with one of the following SCU_COMMAND_CODE + * - SCU_COMMAND_CODE_INITIATOR_NEW_TASK + * - SCU_COMMAND_CODE_ACTIVE_TASK + * - SCU_COMMAND_CODE_PRIMITIVE_SEQ_TASK + * - SCU_COMMAND_CODE_TARGET_RAW_FRAMES + */ + u32 command_code:2; + + /** + * This field is set to true if the remote node should be suspended. + * This bit is only valid for SSP & SMP target devices. + */ + u32 suspend_node:1; + + /** + * This field is programmed with one of the following command type codes + * + * For SAS requests use the scu_ssp_task_type + * - SCU_TASK_TYPE_IOREAD + * - SCU_TASK_TYPE_IOWRITE + * - SCU_TASK_TYPE_SMP_REQUEST + * - SCU_TASK_TYPE_RESPONSE + * - SCU_TASK_TYPE_RAW_FRAME + * - SCU_TASK_TYPE_PRIMITIVE + * + * For SATA requests use the scu_sata_task_type + * - SCU_TASK_TYPE_DMA_IN + * - SCU_TASK_TYPE_FPDMAQ_READ + * - SCU_TASK_TYPE_PACKET_DMA_IN + * - SCU_TASK_TYPE_SATA_RAW_FRAME + * - SCU_TASK_TYPE_DMA_OUT + * - SCU_TASK_TYPE_FPDMAQ_WRITE + * - SCU_TASK_TYPE_PACKET_DMA_OUT + */ + u32 task_type:4; + + /* OFFSET 0x08 */ + /** + * This field is reserved and the must be set to 0x00 + */ + u32 link_layer_control:8; /* presently all reserved */ + + /** + * This field is set to true when TLR is to be enabled + */ + u32 ssp_tlr_enable:1; + + /** + * This is field specifies if the SCU DMAs a response frame to host + * memory for good response frames when operating in target mode. + */ + u32 dma_ssp_target_good_response:1; + + /** + * This field indicates if the SCU should DMA the response frame to + * host memory. + */ + u32 do_not_dma_ssp_good_response:1; + + /** + * This field is set to true when strict ordering is to be enabled + */ + u32 strict_ordering:1; + + /** + * This field indicates the type of endianess to be utilized for the + * frame. command, task, and response frames utilized control_frame + * set to 1. + */ + u32 control_frame:1; + + /** + * This field is reserved and the driver should set to 0x00 + */ + u32 tl_control_reserved:3; + + /** + * This field is set to true when the SCU hardware task timeout control is to + * be enabled + */ + u32 timeout_enable:1; + + /** + * This field is reserved and the driver should set it to 0x00 + */ + u32 pts_control_reserved:7; + + /** + * This field should be set to true when block guard is to be enabled + */ + u32 block_guard_enable:1; + + /** + * This field is reserved and the driver should set to 0x00 + */ + u32 sdma_control_reserved:7; + + /* OFFSET 0x0C */ + /** + * This field is the address modifier for this io request it should be + * programmed with the virtual function that is making the request. + */ + u32 address_modifier:16; + + /** + * @todo What we support mirrored SMP response frame? + */ + u32 mirrored_protocol_engine:3; /* mirrored protocol Engine Index */ + + /** + * If this is a mirrored request the logical port index for the mirrored RNi + * must be programmed. + */ + u32 mirrored_logical_port:4; /* mirrored local port index */ + + /** + * This field is reserved and the driver must set it to 0x00 + */ + u32 reserved_0C_0:8; + + /** + * This field must be set to true if the mirrored request processing is to be + * enabled. + */ + u32 mirror_request_enable:1; /* Mirrored request Enable */ + + /* OFFSET 0x10 */ + /** + * This field is the command iu length in dwords + */ + u32 ssp_command_iu_length:8; + + /** + * This is the target TLR enable bit it must be set to 0 when creatning the + * task context. + */ + u32 xfer_ready_tlr_enable:1; + + /** + * This field is reserved and the driver must set it to 0x00 + */ + u32 reserved_10_0:7; + + /** + * This is the maximum burst size that the SCU hardware will send in one + * connection its value is (N x 512) and N must be a multiple of 2. If the + * value is 0x00 then maximum burst size is disabled. + */ + u32 ssp_max_burst_size:16; + + /* OFFSET 0x14 */ + /** + * This filed is set to the number of bytes to be transfered in the request. + */ + u32 transfer_length_bytes:24; /* In terms of bytes */ + + /** + * This field is reserved and the driver should set it to 0x00 + */ + u32 reserved_14_0:8; + + /* OFFSET 0x18-0x2C */ + /** + * This union provides for the protocol specif part of the SCU Task Context. + */ + union protocol_context type; + + /* OFFSET 0x30-0x34 */ + /** + * This field is the upper 32 bits of the 64 bit physical address of the + * command iu buffer + */ + u32 command_iu_upper; + + /** + * This field is the lower 32 bits of the 64 bit physical address of the + * command iu buffer + */ + u32 command_iu_lower; + + /* OFFSET 0x38-0x3C */ + /** + * This field is the upper 32 bits of the 64 bit physical address of the + * response iu buffer + */ + u32 response_iu_upper; + + /** + * This field is the lower 32 bits of the 64 bit physical address of the + * response iu buffer + */ + u32 response_iu_lower; + + /* OFFSET 0x40 */ + /** + * This field is set to the task phase of the SCU hardware. The driver must + * set this to 0x01 + */ + u32 task_phase:8; + + /** + * This field is set to the transport layer task status. The driver must set + * this to 0x00 + */ + u32 task_status:8; + + /** + * This field is used during initiator write TLR + */ + u32 previous_extended_tag:4; + + /** + * This field is set the maximum number of retries for a STP non-data FIS + */ + u32 stp_retry_count:2; + + /** + * This field is reserved and the driver must set it to 0x00 + */ + u32 reserved_40_1:2; + + /** + * This field is used by the SCU TL to determine when to take a snapshot when + * tranmitting read data frames. + * - 0x00 The entire IO + * - 0x01 32k + * - 0x02 64k + * - 0x04 128k + * - 0x08 256k + */ + u32 ssp_tlr_threshold:4; + + /** + * This field is reserved and the driver must set it to 0x00 + */ + u32 reserved_40_2:4; + + /* OFFSET 0x44 */ + u32 write_data_length; /* read only set to 0 */ + + /* OFFSET 0x48-0x58 */ + struct transport_snapshot snapshot; /* read only set to 0 */ + + /* OFFSET 0x5C */ + u32 block_protection_enable:1; + u32 block_size:2; + u32 block_protection_function:2; + u32 reserved_5C_0:9; + u32 active_sgl_element:2; /* read only set to 0 */ + u32 sgl_exhausted:1; /* read only set to 0 */ + u32 payload_data_transfer_error:4; /* read only set to 0 */ + u32 frame_buffer_offset:11; /* read only set to 0 */ + + /* OFFSET 0x60-0x7C */ + /** + * This field is the first SGL element pair found in the TC data structure. + */ + struct scu_sgl_element_pair sgl_pair_ab; + /* OFFSET 0x80-0x9C */ + /** + * This field is the second SGL element pair found in the TC data structure. + */ + struct scu_sgl_element_pair sgl_pair_cd; + + /* OFFSET 0xA0-BC */ + struct scu_sgl_element_pair sgl_snapshot_ac; + + /* OFFSET 0xC0 */ + u32 active_sgl_element_pair; /* read only set to 0 */ + + /* OFFSET 0xC4-0xCC */ + u32 reserved_C4_CC[3]; + + /* OFFSET 0xD0 */ + u32 intermediate_crc_value:16; + u32 initial_crc_seed:16; + + /* OFFSET 0xD4 */ + u32 application_tag_for_verify:16; + u32 application_tag_for_generate:16; + + /* OFFSET 0xD8 */ + u32 reference_tag_seed_for_verify_function; + + /* OFFSET 0xDC */ + u32 reserved_DC; + + /* OFFSET 0xE0 */ + u32 reserved_E0_0:16; + u32 application_tag_mask_for_generate:16; + + /* OFFSET 0xE4 */ + u32 block_protection_control:16; + u32 application_tag_mask_for_verify:16; + + /* OFFSET 0xE8 */ + u32 block_protection_error:8; + u32 reserved_E8_0:24; + + /* OFFSET 0xEC */ + u32 reference_tag_seed_for_verify; + + /* OFFSET 0xF0 */ + u32 intermediate_crc_valid_snapshot:16; + u32 reserved_F0_0:16; + + /* OFFSET 0xF4 */ + u32 reference_tag_seed_for_verify_function_snapshot; + + /* OFFSET 0xF8 */ + u32 snapshot_of_reserved_dword_DC_of_tc; + + /* OFFSET 0xFC */ + u32 reference_tag_seed_for_generate_function_snapshot; + +}; + +#endif /* _SCU_TASK_CONTEXT_H_ */ diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c new file mode 100644 index 000000000000..d6bcdd013dc9 --- /dev/null +++ b/drivers/scsi/isci/task.c @@ -0,0 +1,1676 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/completion.h> +#include <linux/irqflags.h> +#include "sas.h" +#include <scsi/libsas.h> +#include "remote_device.h" +#include "remote_node_context.h" +#include "isci.h" +#include "request.h" +#include "task.h" +#include "host.h" + +/** +* isci_task_refuse() - complete the request to the upper layer driver in +* the case where an I/O needs to be completed back in the submit path. +* @ihost: host on which the the request was queued +* @task: request to complete +* @response: response code for the completed task. +* @status: status code for the completed task. +* +*/ +static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task, + enum service_response response, + enum exec_status status) + +{ + enum isci_completion_selection disposition; + + disposition = isci_perform_normal_io_completion; + disposition = isci_task_set_completion_status(task, response, status, + disposition); + + /* Tasks aborted specifically by a call to the lldd_abort_task + * function should not be completed to the host in the regular path. + */ + switch (disposition) { + case isci_perform_normal_io_completion: + /* Normal notification (task_done) */ + dev_dbg(&ihost->pdev->dev, + "%s: Normal - task = %p, response=%d, " + "status=%d\n", + __func__, task, response, status); + + task->lldd_task = NULL; + + isci_execpath_callback(ihost, task, task->task_done); + break; + + case isci_perform_aborted_io_completion: + /* + * No notification because this request is already in the + * abort path. + */ + dev_dbg(&ihost->pdev->dev, + "%s: Aborted - task = %p, response=%d, " + "status=%d\n", + __func__, task, response, status); + break; + + case isci_perform_error_io_completion: + /* Use sas_task_abort */ + dev_dbg(&ihost->pdev->dev, + "%s: Error - task = %p, response=%d, " + "status=%d\n", + __func__, task, response, status); + + isci_execpath_callback(ihost, task, sas_task_abort); + break; + + default: + dev_dbg(&ihost->pdev->dev, + "%s: isci task notification default case!", + __func__); + sas_task_abort(task); + break; + } +} + +#define for_each_sas_task(num, task) \ + for (; num > 0; num--,\ + task = list_entry(task->list.next, struct sas_task, list)) + + +static inline int isci_device_io_ready(struct isci_remote_device *idev, + struct sas_task *task) +{ + return idev ? test_bit(IDEV_IO_READY, &idev->flags) || + (test_bit(IDEV_IO_NCQERROR, &idev->flags) && + isci_task_is_ncq_recovery(task)) + : 0; +} +/** + * isci_task_execute_task() - This function is one of the SAS Domain Template + * functions. This function is called by libsas to send a task down to + * hardware. + * @task: This parameter specifies the SAS task to send. + * @num: This parameter specifies the number of tasks to queue. + * @gfp_flags: This parameter specifies the context of this call. + * + * status, zero indicates success. + */ +int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags) +{ + struct isci_host *ihost = dev_to_ihost(task->dev); + struct isci_remote_device *idev; + unsigned long flags; + bool io_ready; + u16 tag; + + dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num); + + for_each_sas_task(num, task) { + enum sci_status status = SCI_FAILURE; + + spin_lock_irqsave(&ihost->scic_lock, flags); + idev = isci_lookup_device(task->dev); + io_ready = isci_device_io_ready(idev, task); + tag = isci_alloc_tag(ihost); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + dev_dbg(&ihost->pdev->dev, + "task: %p, num: %d dev: %p idev: %p:%#lx cmd = %p\n", + task, num, task->dev, idev, idev ? idev->flags : 0, + task->uldd_task); + + if (!idev) { + isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED, + SAS_DEVICE_UNKNOWN); + } else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) { + /* Indicate QUEUE_FULL so that the scsi midlayer + * retries. + */ + isci_task_refuse(ihost, task, SAS_TASK_COMPLETE, + SAS_QUEUE_FULL); + } else { + /* There is a device and it's ready for I/O. */ + spin_lock_irqsave(&task->task_state_lock, flags); + + if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { + /* The I/O was aborted. */ + spin_unlock_irqrestore(&task->task_state_lock, + flags); + + isci_task_refuse(ihost, task, + SAS_TASK_UNDELIVERED, + SAM_STAT_TASK_ABORTED); + } else { + task->task_state_flags |= SAS_TASK_AT_INITIATOR; + spin_unlock_irqrestore(&task->task_state_lock, flags); + + /* build and send the request. */ + status = isci_request_execute(ihost, idev, task, tag); + + if (status != SCI_SUCCESS) { + + spin_lock_irqsave(&task->task_state_lock, flags); + /* Did not really start this command. */ + task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; + spin_unlock_irqrestore(&task->task_state_lock, flags); + + /* Indicate QUEUE_FULL so that the scsi + * midlayer retries. if the request + * failed for remote device reasons, + * it gets returned as + * SAS_TASK_UNDELIVERED next time + * through. + */ + isci_task_refuse(ihost, task, + SAS_TASK_COMPLETE, + SAS_QUEUE_FULL); + } + } + } + if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) { + spin_lock_irqsave(&ihost->scic_lock, flags); + /* command never hit the device, so just free + * the tci and skip the sequence increment + */ + isci_tci_free(ihost, ISCI_TAG_TCI(tag)); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + } + isci_put_device(idev); + } + return 0; +} + +static enum sci_status isci_sata_management_task_request_build(struct isci_request *ireq) +{ + struct isci_tmf *isci_tmf; + enum sci_status status; + + if (tmf_task != ireq->ttype) + return SCI_FAILURE; + + isci_tmf = isci_request_access_tmf(ireq); + + switch (isci_tmf->tmf_code) { + + case isci_tmf_sata_srst_high: + case isci_tmf_sata_srst_low: { + struct host_to_dev_fis *fis = &ireq->stp.cmd; + + memset(fis, 0, sizeof(*fis)); + + fis->fis_type = 0x27; + fis->flags &= ~0x80; + fis->flags &= 0xF0; + if (isci_tmf->tmf_code == isci_tmf_sata_srst_high) + fis->control |= ATA_SRST; + else + fis->control &= ~ATA_SRST; + break; + } + /* other management commnd go here... */ + default: + return SCI_FAILURE; + } + + /* core builds the protocol specific request + * based on the h2d fis. + */ + status = sci_task_request_construct_sata(ireq); + + return status; +} + +static struct isci_request *isci_task_request_build(struct isci_host *ihost, + struct isci_remote_device *idev, + u16 tag, struct isci_tmf *isci_tmf) +{ + enum sci_status status = SCI_FAILURE; + struct isci_request *ireq = NULL; + struct domain_device *dev; + + dev_dbg(&ihost->pdev->dev, + "%s: isci_tmf = %p\n", __func__, isci_tmf); + + dev = idev->domain_dev; + + /* do common allocation and init of request object. */ + ireq = isci_tmf_request_from_tag(ihost, isci_tmf, tag); + if (!ireq) + return NULL; + + /* let the core do it's construct. */ + status = sci_task_request_construct(ihost, idev, tag, + ireq); + + if (status != SCI_SUCCESS) { + dev_warn(&ihost->pdev->dev, + "%s: sci_task_request_construct failed - " + "status = 0x%x\n", + __func__, + status); + return NULL; + } + + /* XXX convert to get this from task->tproto like other drivers */ + if (dev->dev_type == SAS_END_DEV) { + isci_tmf->proto = SAS_PROTOCOL_SSP; + status = sci_task_request_construct_ssp(ireq); + if (status != SCI_SUCCESS) + return NULL; + } + + if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { + isci_tmf->proto = SAS_PROTOCOL_SATA; + status = isci_sata_management_task_request_build(ireq); + + if (status != SCI_SUCCESS) + return NULL; + } + return ireq; +} + +static int isci_task_execute_tmf(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_tmf *tmf, unsigned long timeout_ms) +{ + DECLARE_COMPLETION_ONSTACK(completion); + enum sci_task_status status = SCI_TASK_FAILURE; + struct isci_request *ireq; + int ret = TMF_RESP_FUNC_FAILED; + unsigned long flags; + unsigned long timeleft; + u16 tag; + + spin_lock_irqsave(&ihost->scic_lock, flags); + tag = isci_alloc_tag(ihost); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (tag == SCI_CONTROLLER_INVALID_IO_TAG) + return ret; + + /* sanity check, return TMF_RESP_FUNC_FAILED + * if the device is not there and ready. + */ + if (!idev || + (!test_bit(IDEV_IO_READY, &idev->flags) && + !test_bit(IDEV_IO_NCQERROR, &idev->flags))) { + dev_dbg(&ihost->pdev->dev, + "%s: idev = %p not ready (%#lx)\n", + __func__, + idev, idev ? idev->flags : 0); + goto err_tci; + } else + dev_dbg(&ihost->pdev->dev, + "%s: idev = %p\n", + __func__, idev); + + /* Assign the pointer to the TMF's completion kernel wait structure. */ + tmf->complete = &completion; + + ireq = isci_task_request_build(ihost, idev, tag, tmf); + if (!ireq) + goto err_tci; + + spin_lock_irqsave(&ihost->scic_lock, flags); + + /* start the TMF io. */ + status = sci_controller_start_task(ihost, idev, ireq); + + if (status != SCI_TASK_SUCCESS) { + dev_dbg(&ihost->pdev->dev, + "%s: start_io failed - status = 0x%x, request = %p\n", + __func__, + status, + ireq); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + goto err_tci; + } + + if (tmf->cb_state_func != NULL) + tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data); + + isci_request_change_state(ireq, started); + + /* add the request to the remote device request list. */ + list_add(&ireq->dev_node, &idev->reqs_in_process); + + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + /* Wait for the TMF to complete, or a timeout. */ + timeleft = wait_for_completion_timeout(&completion, + msecs_to_jiffies(timeout_ms)); + + if (timeleft == 0) { + spin_lock_irqsave(&ihost->scic_lock, flags); + + if (tmf->cb_state_func != NULL) + tmf->cb_state_func(isci_tmf_timed_out, tmf, tmf->cb_data); + + sci_controller_terminate_request(ihost, + idev, + ireq); + + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + wait_for_completion(tmf->complete); + } + + isci_print_tmf(tmf); + + if (tmf->status == SCI_SUCCESS) + ret = TMF_RESP_FUNC_COMPLETE; + else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) { + dev_dbg(&ihost->pdev->dev, + "%s: tmf.status == " + "SCI_FAILURE_IO_RESPONSE_VALID\n", + __func__); + ret = TMF_RESP_FUNC_COMPLETE; + } + /* Else - leave the default "failed" status alone. */ + + dev_dbg(&ihost->pdev->dev, + "%s: completed request = %p\n", + __func__, + ireq); + + return ret; + + err_tci: + spin_lock_irqsave(&ihost->scic_lock, flags); + isci_tci_free(ihost, ISCI_TAG_TCI(tag)); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + return ret; +} + +static void isci_task_build_tmf(struct isci_tmf *tmf, + enum isci_tmf_function_codes code, + void (*tmf_sent_cb)(enum isci_tmf_cb_state, + struct isci_tmf *, + void *), + void *cb_data) +{ + memset(tmf, 0, sizeof(*tmf)); + + tmf->tmf_code = code; + tmf->cb_state_func = tmf_sent_cb; + tmf->cb_data = cb_data; +} + +static void isci_task_build_abort_task_tmf(struct isci_tmf *tmf, + enum isci_tmf_function_codes code, + void (*tmf_sent_cb)(enum isci_tmf_cb_state, + struct isci_tmf *, + void *), + struct isci_request *old_request) +{ + isci_task_build_tmf(tmf, code, tmf_sent_cb, old_request); + tmf->io_tag = old_request->io_tag; +} + +/** + * isci_task_validate_request_to_abort() - This function checks the given I/O + * against the "started" state. If the request is still "started", it's + * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD + * BEFORE CALLING THIS FUNCTION. + * @isci_request: This parameter specifies the request object to control. + * @isci_host: This parameter specifies the ISCI host object + * @isci_device: This is the device to which the request is pending. + * @aborted_io_completion: This is a completion structure that will be added to + * the request in case it is changed to aborting; this completion is + * triggered when the request is fully completed. + * + * Either "started" on successful change of the task status to "aborted", or + * "unallocated" if the task cannot be controlled. + */ +static enum isci_request_status isci_task_validate_request_to_abort( + struct isci_request *isci_request, + struct isci_host *isci_host, + struct isci_remote_device *isci_device, + struct completion *aborted_io_completion) +{ + enum isci_request_status old_state = unallocated; + + /* Only abort the task if it's in the + * device's request_in_process list + */ + if (isci_request && !list_empty(&isci_request->dev_node)) { + old_state = isci_request_change_started_to_aborted( + isci_request, aborted_io_completion); + + } + + return old_state; +} + +/** +* isci_request_cleanup_completed_loiterer() - This function will take care of +* the final cleanup on any request which has been explicitly terminated. +* @isci_host: This parameter specifies the ISCI host object +* @isci_device: This is the device to which the request is pending. +* @isci_request: This parameter specifies the terminated request object. +* @task: This parameter is the libsas I/O request. +*/ +static void isci_request_cleanup_completed_loiterer( + struct isci_host *isci_host, + struct isci_remote_device *isci_device, + struct isci_request *isci_request, + struct sas_task *task) +{ + unsigned long flags; + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_device=%p, request=%p, task=%p\n", + __func__, isci_device, isci_request, task); + + if (task != NULL) { + + spin_lock_irqsave(&task->task_state_lock, flags); + task->lldd_task = NULL; + + task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET; + + isci_set_task_doneflags(task); + + /* If this task is not in the abort path, call task_done. */ + if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + + spin_unlock_irqrestore(&task->task_state_lock, flags); + task->task_done(task); + } else + spin_unlock_irqrestore(&task->task_state_lock, flags); + } + + if (isci_request != NULL) { + spin_lock_irqsave(&isci_host->scic_lock, flags); + list_del_init(&isci_request->dev_node); + spin_unlock_irqrestore(&isci_host->scic_lock, flags); + } +} + +/** + * isci_terminate_request_core() - This function will terminate the given + * request, and wait for it to complete. This function must only be called + * from a thread that can wait. Note that the request is terminated and + * completed (back to the host, if started there). + * @ihost: This SCU. + * @idev: The target. + * @isci_request: The I/O request to be terminated. + * + */ +static void isci_terminate_request_core(struct isci_host *ihost, + struct isci_remote_device *idev, + struct isci_request *isci_request) +{ + enum sci_status status = SCI_SUCCESS; + bool was_terminated = false; + bool needs_cleanup_handling = false; + enum isci_request_status request_status; + unsigned long flags; + unsigned long termination_completed = 1; + struct completion *io_request_completion; + struct sas_task *task; + + dev_dbg(&ihost->pdev->dev, + "%s: device = %p; request = %p\n", + __func__, idev, isci_request); + + spin_lock_irqsave(&ihost->scic_lock, flags); + + io_request_completion = isci_request->io_request_completion; + + task = (isci_request->ttype == io_task) + ? isci_request_access_task(isci_request) + : NULL; + + /* Note that we are not going to control + * the target to abort the request. + */ + set_bit(IREQ_COMPLETE_IN_TARGET, &isci_request->flags); + + /* Make sure the request wasn't just sitting around signalling + * device condition (if the request handle is NULL, then the + * request completed but needed additional handling here). + */ + if (!test_bit(IREQ_TERMINATED, &isci_request->flags)) { + was_terminated = true; + needs_cleanup_handling = true; + status = sci_controller_terminate_request(ihost, + idev, + isci_request); + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + /* + * The only time the request to terminate will + * fail is when the io request is completed and + * being aborted. + */ + if (status != SCI_SUCCESS) { + dev_dbg(&ihost->pdev->dev, + "%s: sci_controller_terminate_request" + " returned = 0x%x\n", + __func__, status); + + isci_request->io_request_completion = NULL; + + } else { + if (was_terminated) { + dev_dbg(&ihost->pdev->dev, + "%s: before completion wait (%p/%p)\n", + __func__, isci_request, io_request_completion); + + /* Wait here for the request to complete. */ + #define TERMINATION_TIMEOUT_MSEC 500 + termination_completed + = wait_for_completion_timeout( + io_request_completion, + msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC)); + + if (!termination_completed) { + + /* The request to terminate has timed out. */ + spin_lock_irqsave(&ihost->scic_lock, + flags); + + /* Check for state changes. */ + if (!test_bit(IREQ_TERMINATED, &isci_request->flags)) { + + /* The best we can do is to have the + * request die a silent death if it + * ever really completes. + * + * Set the request state to "dead", + * and clear the task pointer so that + * an actual completion event callback + * doesn't do anything. + */ + isci_request->status = dead; + isci_request->io_request_completion + = NULL; + + if (isci_request->ttype == io_task) { + + /* Break links with the + * sas_task. + */ + isci_request->ttype_ptr.io_task_ptr + = NULL; + } + } else + termination_completed = 1; + + spin_unlock_irqrestore(&ihost->scic_lock, + flags); + + if (!termination_completed) { + + dev_dbg(&ihost->pdev->dev, + "%s: *** Timeout waiting for " + "termination(%p/%p)\n", + __func__, io_request_completion, + isci_request); + + /* The request can no longer be referenced + * safely since it may go away if the + * termination every really does complete. + */ + isci_request = NULL; + } + } + if (termination_completed) + dev_dbg(&ihost->pdev->dev, + "%s: after completion wait (%p/%p)\n", + __func__, isci_request, io_request_completion); + } + + if (termination_completed) { + + isci_request->io_request_completion = NULL; + + /* Peek at the status of the request. This will tell + * us if there was special handling on the request such that it + * needs to be detached and freed here. + */ + spin_lock_irqsave(&isci_request->state_lock, flags); + request_status = isci_request->status; + + if ((isci_request->ttype == io_task) /* TMFs are in their own thread */ + && ((request_status == aborted) + || (request_status == aborting) + || (request_status == terminating) + || (request_status == completed) + || (request_status == dead) + ) + ) { + + /* The completion routine won't free a request in + * the aborted/aborting/etc. states, so we do + * it here. + */ + needs_cleanup_handling = true; + } + spin_unlock_irqrestore(&isci_request->state_lock, flags); + + } + if (needs_cleanup_handling) + isci_request_cleanup_completed_loiterer( + ihost, idev, isci_request, task); + } +} + +/** + * isci_terminate_pending_requests() - This function will change the all of the + * requests on the given device's state to "aborting", will terminate the + * requests, and wait for them to complete. This function must only be + * called from a thread that can wait. Note that the requests are all + * terminated and completed (back to the host, if started there). + * @isci_host: This parameter specifies SCU. + * @idev: This parameter specifies the target. + * + */ +void isci_terminate_pending_requests(struct isci_host *ihost, + struct isci_remote_device *idev) +{ + struct completion request_completion; + enum isci_request_status old_state; + unsigned long flags; + LIST_HEAD(list); + + spin_lock_irqsave(&ihost->scic_lock, flags); + list_splice_init(&idev->reqs_in_process, &list); + + /* assumes that isci_terminate_request_core deletes from the list */ + while (!list_empty(&list)) { + struct isci_request *ireq = list_entry(list.next, typeof(*ireq), dev_node); + + /* Change state to "terminating" if it is currently + * "started". + */ + old_state = isci_request_change_started_to_newstate(ireq, + &request_completion, + terminating); + switch (old_state) { + case started: + case completed: + case aborting: + break; + default: + /* termination in progress, or otherwise dispositioned. + * We know the request was on 'list' so should be safe + * to move it back to reqs_in_process + */ + list_move(&ireq->dev_node, &idev->reqs_in_process); + ireq = NULL; + break; + } + + if (!ireq) + continue; + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + init_completion(&request_completion); + + dev_dbg(&ihost->pdev->dev, + "%s: idev=%p request=%p; task=%p old_state=%d\n", + __func__, idev, ireq, + ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL, + old_state); + + /* If the old_state is started: + * This request was not already being aborted. If it had been, + * then the aborting I/O (ie. the TMF request) would not be in + * the aborting state, and thus would be terminated here. Note + * that since the TMF completion's call to the kernel function + * "complete()" does not happen until the pending I/O request + * terminate fully completes, we do not have to implement a + * special wait here for already aborting requests - the + * termination of the TMF request will force the request + * to finish it's already started terminate. + * + * If old_state == completed: + * This request completed from the SCU hardware perspective + * and now just needs cleaning up in terms of freeing the + * request and potentially calling up to libsas. + * + * If old_state == aborting: + * This request has already gone through a TMF timeout, but may + * not have been terminated; needs cleaning up at least. + */ + isci_terminate_request_core(ihost, idev, ireq); + spin_lock_irqsave(&ihost->scic_lock, flags); + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); +} + +/** + * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain + * Template functions. + * @lun: This parameter specifies the lun to be reset. + * + * status, zero indicates success. + */ +static int isci_task_send_lu_reset_sas( + struct isci_host *isci_host, + struct isci_remote_device *isci_device, + u8 *lun) +{ + struct isci_tmf tmf; + int ret = TMF_RESP_FUNC_FAILED; + + dev_dbg(&isci_host->pdev->dev, + "%s: isci_host = %p, isci_device = %p\n", + __func__, isci_host, isci_device); + /* Send the LUN reset to the target. By the time the call returns, + * the TMF has fully exected in the target (in which case the return + * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or + * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). + */ + isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset, NULL, NULL); + + #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ + ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, ISCI_LU_RESET_TIMEOUT_MS); + + if (ret == TMF_RESP_FUNC_COMPLETE) + dev_dbg(&isci_host->pdev->dev, + "%s: %p: TMF_LU_RESET passed\n", + __func__, isci_device); + else + dev_dbg(&isci_host->pdev->dev, + "%s: %p: TMF_LU_RESET failed (%x)\n", + __func__, isci_device, ret); + + return ret; +} + +static int isci_task_send_lu_reset_sata(struct isci_host *ihost, + struct isci_remote_device *idev, u8 *lun) +{ + int ret = TMF_RESP_FUNC_FAILED; + struct isci_tmf tmf; + + /* Send the soft reset to the target */ + #define ISCI_SRST_TIMEOUT_MS 25000 /* 25 second timeout. */ + isci_task_build_tmf(&tmf, isci_tmf_sata_srst_high, NULL, NULL); + + ret = isci_task_execute_tmf(ihost, idev, &tmf, ISCI_SRST_TIMEOUT_MS); + + if (ret != TMF_RESP_FUNC_COMPLETE) { + dev_dbg(&ihost->pdev->dev, + "%s: Assert SRST failed (%p) = %x", + __func__, idev, ret); + + /* Return the failure so that the LUN reset is escalated + * to a target reset. + */ + } + return ret; +} + +/** + * isci_task_lu_reset() - This function is one of the SAS Domain Template + * functions. This is one of the Task Management functoins called by libsas, + * to reset the given lun. Note the assumption that while this call is + * executing, no I/O will be sent by the host to the device. + * @lun: This parameter specifies the lun to be reset. + * + * status, zero indicates success. + */ +int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun) +{ + struct isci_host *isci_host = dev_to_ihost(domain_device); + struct isci_remote_device *isci_device; + unsigned long flags; + int ret; + + spin_lock_irqsave(&isci_host->scic_lock, flags); + isci_device = isci_lookup_device(domain_device); + spin_unlock_irqrestore(&isci_host->scic_lock, flags); + + dev_dbg(&isci_host->pdev->dev, + "%s: domain_device=%p, isci_host=%p; isci_device=%p\n", + __func__, domain_device, isci_host, isci_device); + + if (isci_device) + set_bit(IDEV_EH, &isci_device->flags); + + /* If there is a device reset pending on any request in the + * device's list, fail this LUN reset request in order to + * escalate to the device reset. + */ + if (!isci_device || + isci_device_is_reset_pending(isci_host, isci_device)) { + dev_dbg(&isci_host->pdev->dev, + "%s: No dev (%p), or " + "RESET PENDING: domain_device=%p\n", + __func__, isci_device, domain_device); + ret = TMF_RESP_FUNC_FAILED; + goto out; + } + + /* Send the task management part of the reset. */ + if (sas_protocol_ata(domain_device->tproto)) { + ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun); + } else + ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun); + + /* If the LUN reset worked, all the I/O can now be terminated. */ + if (ret == TMF_RESP_FUNC_COMPLETE) + /* Terminate all I/O now. */ + isci_terminate_pending_requests(isci_host, + isci_device); + + out: + isci_put_device(isci_device); + return ret; +} + + +/* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */ +int isci_task_clear_nexus_port(struct asd_sas_port *port) +{ + return TMF_RESP_FUNC_FAILED; +} + + + +int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) +{ + return TMF_RESP_FUNC_FAILED; +} + +/* Task Management Functions. Must be called from process context. */ + +/** + * isci_abort_task_process_cb() - This is a helper function for the abort task + * TMF command. It manages the request state with respect to the successful + * transmission / completion of the abort task request. + * @cb_state: This parameter specifies when this function was called - after + * the TMF request has been started and after it has timed-out. + * @tmf: This parameter specifies the TMF in progress. + * + * + */ +static void isci_abort_task_process_cb( + enum isci_tmf_cb_state cb_state, + struct isci_tmf *tmf, + void *cb_data) +{ + struct isci_request *old_request; + + old_request = (struct isci_request *)cb_data; + + dev_dbg(&old_request->isci_host->pdev->dev, + "%s: tmf=%p, old_request=%p\n", + __func__, tmf, old_request); + + switch (cb_state) { + + case isci_tmf_started: + /* The TMF has been started. Nothing to do here, since the + * request state was already set to "aborted" by the abort + * task function. + */ + if ((old_request->status != aborted) + && (old_request->status != completed)) + dev_dbg(&old_request->isci_host->pdev->dev, + "%s: Bad request status (%d): tmf=%p, old_request=%p\n", + __func__, old_request->status, tmf, old_request); + break; + + case isci_tmf_timed_out: + + /* Set the task's state to "aborting", since the abort task + * function thread set it to "aborted" (above) in anticipation + * of the task management request working correctly. Since the + * timeout has now fired, the TMF request failed. We set the + * state such that the request completion will indicate the + * device is no longer present. + */ + isci_request_change_state(old_request, aborting); + break; + + default: + dev_dbg(&old_request->isci_host->pdev->dev, + "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n", + __func__, cb_state, tmf, old_request); + break; + } +} + +/** + * isci_task_abort_task() - This function is one of the SAS Domain Template + * functions. This function is called by libsas to abort a specified task. + * @task: This parameter specifies the SAS task to abort. + * + * status, zero indicates success. + */ +int isci_task_abort_task(struct sas_task *task) +{ + struct isci_host *isci_host = dev_to_ihost(task->dev); + DECLARE_COMPLETION_ONSTACK(aborted_io_completion); + struct isci_request *old_request = NULL; + enum isci_request_status old_state; + struct isci_remote_device *isci_device = NULL; + struct isci_tmf tmf; + int ret = TMF_RESP_FUNC_FAILED; + unsigned long flags; + bool any_dev_reset = false; + + /* Get the isci_request reference from the task. Note that + * this check does not depend on the pending request list + * in the device, because tasks driving resets may land here + * after completion in the core. + */ + spin_lock_irqsave(&isci_host->scic_lock, flags); + spin_lock(&task->task_state_lock); + + old_request = task->lldd_task; + + /* If task is already done, the request isn't valid */ + if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && + (task->task_state_flags & SAS_TASK_AT_INITIATOR) && + old_request) + isci_device = isci_lookup_device(task->dev); + + spin_unlock(&task->task_state_lock); + spin_unlock_irqrestore(&isci_host->scic_lock, flags); + + dev_dbg(&isci_host->pdev->dev, + "%s: task = %p\n", __func__, task); + + if (!isci_device || !old_request) + goto out; + + set_bit(IDEV_EH, &isci_device->flags); + + /* This version of the driver will fail abort requests for + * SATA/STP. Failing the abort request this way will cause the + * SCSI error handler thread to escalate to LUN reset + */ + if (sas_protocol_ata(task->task_proto)) { + dev_dbg(&isci_host->pdev->dev, + " task %p is for a STP/SATA device;" + " returning TMF_RESP_FUNC_FAILED\n" + " to cause a LUN reset...\n", task); + goto out; + } + + dev_dbg(&isci_host->pdev->dev, + "%s: old_request == %p\n", __func__, old_request); + + any_dev_reset = isci_device_is_reset_pending(isci_host, isci_device); + + spin_lock_irqsave(&task->task_state_lock, flags); + + any_dev_reset = any_dev_reset || (task->task_state_flags & SAS_TASK_NEED_DEV_RESET); + + /* If the extraction of the request reference from the task + * failed, then the request has been completed (or if there is a + * pending reset then this abort request function must be failed + * in order to escalate to the target reset). + */ + if ((old_request == NULL) || any_dev_reset) { + + /* If the device reset task flag is set, fail the task + * management request. Otherwise, the original request + * has completed. + */ + if (any_dev_reset) { + + /* Turn off the task's DONE to make sure this + * task is escalated to a target reset. + */ + task->task_state_flags &= ~SAS_TASK_STATE_DONE; + + /* Make the reset happen as soon as possible. */ + task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; + + spin_unlock_irqrestore(&task->task_state_lock, flags); + + /* Fail the task management request in order to + * escalate to the target reset. + */ + ret = TMF_RESP_FUNC_FAILED; + + dev_dbg(&isci_host->pdev->dev, + "%s: Failing task abort in order to " + "escalate to target reset because\n" + "SAS_TASK_NEED_DEV_RESET is set for " + "task %p on dev %p\n", + __func__, task, isci_device); + + + } else { + /* The request has already completed and there + * is nothing to do here other than to set the task + * done bit, and indicate that the task abort function + * was sucessful. + */ + isci_set_task_doneflags(task); + + spin_unlock_irqrestore(&task->task_state_lock, flags); + + ret = TMF_RESP_FUNC_COMPLETE; + + dev_dbg(&isci_host->pdev->dev, + "%s: abort task not needed for %p\n", + __func__, task); + } + goto out; + } else { + spin_unlock_irqrestore(&task->task_state_lock, flags); + } + + spin_lock_irqsave(&isci_host->scic_lock, flags); + + /* Check the request status and change to "aborted" if currently + * "starting"; if true then set the I/O kernel completion + * struct that will be triggered when the request completes. + */ + old_state = isci_task_validate_request_to_abort( + old_request, isci_host, isci_device, + &aborted_io_completion); + if ((old_state != started) && + (old_state != completed) && + (old_state != aborting)) { + + spin_unlock_irqrestore(&isci_host->scic_lock, flags); + + /* The request was already being handled by someone else (because + * they got to set the state away from started). + */ + dev_dbg(&isci_host->pdev->dev, + "%s: device = %p; old_request %p already being aborted\n", + __func__, + isci_device, old_request); + ret = TMF_RESP_FUNC_COMPLETE; + goto out; + } + if (task->task_proto == SAS_PROTOCOL_SMP || + test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)) { + + spin_unlock_irqrestore(&isci_host->scic_lock, flags); + + dev_dbg(&isci_host->pdev->dev, + "%s: SMP request (%d)" + " or complete_in_target (%d), thus no TMF\n", + __func__, (task->task_proto == SAS_PROTOCOL_SMP), + test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)); + + /* Set the state on the task. */ + isci_task_all_done(task); + + ret = TMF_RESP_FUNC_COMPLETE; + + /* Stopping and SMP devices are not sent a TMF, and are not + * reset, but the outstanding I/O request is terminated below. + */ + } else { + /* Fill in the tmf stucture */ + isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort, + isci_abort_task_process_cb, + old_request); + + spin_unlock_irqrestore(&isci_host->scic_lock, flags); + + #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */ + ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, + ISCI_ABORT_TASK_TIMEOUT_MS); + + if (ret != TMF_RESP_FUNC_COMPLETE) + dev_dbg(&isci_host->pdev->dev, + "%s: isci_task_send_tmf failed\n", + __func__); + } + if (ret == TMF_RESP_FUNC_COMPLETE) { + set_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags); + + /* Clean up the request on our side, and wait for the aborted + * I/O to complete. + */ + isci_terminate_request_core(isci_host, isci_device, old_request); + } + + /* Make sure we do not leave a reference to aborted_io_completion */ + old_request->io_request_completion = NULL; + out: + isci_put_device(isci_device); + return ret; +} + +/** + * isci_task_abort_task_set() - This function is one of the SAS Domain Template + * functions. This is one of the Task Management functoins called by libsas, + * to abort all task for the given lun. + * @d_device: This parameter specifies the domain device associated with this + * request. + * @lun: This parameter specifies the lun associated with this request. + * + * status, zero indicates success. + */ +int isci_task_abort_task_set( + struct domain_device *d_device, + u8 *lun) +{ + return TMF_RESP_FUNC_FAILED; +} + + +/** + * isci_task_clear_aca() - This function is one of the SAS Domain Template + * functions. This is one of the Task Management functoins called by libsas. + * @d_device: This parameter specifies the domain device associated with this + * request. + * @lun: This parameter specifies the lun associated with this request. + * + * status, zero indicates success. + */ +int isci_task_clear_aca( + struct domain_device *d_device, + u8 *lun) +{ + return TMF_RESP_FUNC_FAILED; +} + + + +/** + * isci_task_clear_task_set() - This function is one of the SAS Domain Template + * functions. This is one of the Task Management functoins called by libsas. + * @d_device: This parameter specifies the domain device associated with this + * request. + * @lun: This parameter specifies the lun associated with this request. + * + * status, zero indicates success. + */ +int isci_task_clear_task_set( + struct domain_device *d_device, + u8 *lun) +{ + return TMF_RESP_FUNC_FAILED; +} + + +/** + * isci_task_query_task() - This function is implemented to cause libsas to + * correctly escalate the failed abort to a LUN or target reset (this is + * because sas_scsi_find_task libsas function does not correctly interpret + * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is + * returned, libsas turns this into a LUN reset; when FUNC_FAILED is + * returned, libsas will turn this into a target reset + * @task: This parameter specifies the sas task being queried. + * @lun: This parameter specifies the lun associated with this request. + * + * status, zero indicates success. + */ +int isci_task_query_task( + struct sas_task *task) +{ + /* See if there is a pending device reset for this device. */ + if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) + return TMF_RESP_FUNC_FAILED; + else + return TMF_RESP_FUNC_SUCC; +} + +/* + * isci_task_request_complete() - This function is called by the sci core when + * an task request completes. + * @ihost: This parameter specifies the ISCI host object + * @ireq: This parameter is the completed isci_request object. + * @completion_status: This parameter specifies the completion status from the + * sci core. + * + * none. + */ +void +isci_task_request_complete(struct isci_host *ihost, + struct isci_request *ireq, + enum sci_task_status completion_status) +{ + struct isci_tmf *tmf = isci_request_access_tmf(ireq); + struct completion *tmf_complete; + + dev_dbg(&ihost->pdev->dev, + "%s: request = %p, status=%d\n", + __func__, ireq, completion_status); + + isci_request_change_state(ireq, completed); + + tmf->status = completion_status; + set_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags); + + if (tmf->proto == SAS_PROTOCOL_SSP) { + memcpy(&tmf->resp.resp_iu, + &ireq->ssp.rsp, + SSP_RESP_IU_MAX_SIZE); + } else if (tmf->proto == SAS_PROTOCOL_SATA) { + memcpy(&tmf->resp.d2h_fis, + &ireq->stp.rsp, + sizeof(struct dev_to_host_fis)); + } + + /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ + tmf_complete = tmf->complete; + + sci_controller_complete_io(ihost, ireq->target_device, ireq); + /* set the 'terminated' flag handle to make sure it cannot be terminated + * or completed again. + */ + set_bit(IREQ_TERMINATED, &ireq->flags); + + isci_request_change_state(ireq, unallocated); + list_del_init(&ireq->dev_node); + + /* The task management part completes last. */ + complete(tmf_complete); +} + +static void isci_smp_task_timedout(unsigned long _task) +{ + struct sas_task *task = (void *) _task; + unsigned long flags; + + spin_lock_irqsave(&task->task_state_lock, flags); + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) + task->task_state_flags |= SAS_TASK_STATE_ABORTED; + spin_unlock_irqrestore(&task->task_state_lock, flags); + + complete(&task->completion); +} + +static void isci_smp_task_done(struct sas_task *task) +{ + if (!del_timer(&task->timer)) + return; + complete(&task->completion); +} + +static struct sas_task *isci_alloc_task(void) +{ + struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL); + + if (task) { + INIT_LIST_HEAD(&task->list); + spin_lock_init(&task->task_state_lock); + task->task_state_flags = SAS_TASK_STATE_PENDING; + init_timer(&task->timer); + init_completion(&task->completion); + } + + return task; +} + +static void isci_free_task(struct isci_host *ihost, struct sas_task *task) +{ + if (task) { + BUG_ON(!list_empty(&task->list)); + kfree(task); + } +} + +static int isci_smp_execute_task(struct isci_host *ihost, + struct domain_device *dev, void *req, + int req_size, void *resp, int resp_size) +{ + int res, retry; + struct sas_task *task = NULL; + + for (retry = 0; retry < 3; retry++) { + task = isci_alloc_task(); + if (!task) + return -ENOMEM; + + task->dev = dev; + task->task_proto = dev->tproto; + sg_init_one(&task->smp_task.smp_req, req, req_size); + sg_init_one(&task->smp_task.smp_resp, resp, resp_size); + + task->task_done = isci_smp_task_done; + + task->timer.data = (unsigned long) task; + task->timer.function = isci_smp_task_timedout; + task->timer.expires = jiffies + 10*HZ; + add_timer(&task->timer); + + res = isci_task_execute_task(task, 1, GFP_KERNEL); + + if (res) { + del_timer(&task->timer); + dev_dbg(&ihost->pdev->dev, + "%s: executing SMP task failed:%d\n", + __func__, res); + goto ex_err; + } + + wait_for_completion(&task->completion); + res = -ECOMM; + if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + dev_dbg(&ihost->pdev->dev, + "%s: smp task timed out or aborted\n", + __func__); + isci_task_abort_task(task); + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { + dev_dbg(&ihost->pdev->dev, + "%s: SMP task aborted and not done\n", + __func__); + goto ex_err; + } + } + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAM_STAT_GOOD) { + res = 0; + break; + } + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_DATA_UNDERRUN) { + /* no error, but return the number of bytes of + * underrun */ + res = task->task_status.residual; + break; + } + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_DATA_OVERRUN) { + res = -EMSGSIZE; + break; + } else { + dev_dbg(&ihost->pdev->dev, + "%s: task to dev %016llx response: 0x%x " + "status 0x%x\n", __func__, + SAS_ADDR(dev->sas_addr), + task->task_status.resp, + task->task_status.stat); + isci_free_task(ihost, task); + task = NULL; + } + } +ex_err: + BUG_ON(retry == 3 && task != NULL); + isci_free_task(ihost, task); + return res; +} + +#define DISCOVER_REQ_SIZE 16 +#define DISCOVER_RESP_SIZE 56 + +int isci_smp_get_phy_attached_dev_type(struct isci_host *ihost, + struct domain_device *dev, + int phy_id, int *adt) +{ + struct smp_resp *disc_resp; + u8 *disc_req; + int res; + + disc_resp = kzalloc(DISCOVER_RESP_SIZE, GFP_KERNEL); + if (!disc_resp) + return -ENOMEM; + + disc_req = kzalloc(DISCOVER_REQ_SIZE, GFP_KERNEL); + if (disc_req) { + disc_req[0] = SMP_REQUEST; + disc_req[1] = SMP_DISCOVER; + disc_req[9] = phy_id; + } else { + kfree(disc_resp); + return -ENOMEM; + } + res = isci_smp_execute_task(ihost, dev, disc_req, DISCOVER_REQ_SIZE, + disc_resp, DISCOVER_RESP_SIZE); + if (!res) { + if (disc_resp->result != SMP_RESP_FUNC_ACC) + res = disc_resp->result; + else + *adt = disc_resp->disc.attached_dev_type; + } + kfree(disc_req); + kfree(disc_resp); + + return res; +} + +static void isci_wait_for_smp_phy_reset(struct isci_remote_device *idev, int phy_num) +{ + struct domain_device *dev = idev->domain_dev; + struct isci_port *iport = idev->isci_port; + struct isci_host *ihost = iport->isci_host; + int res, iteration = 0, attached_device_type; + #define STP_WAIT_MSECS 25000 + unsigned long tmo = msecs_to_jiffies(STP_WAIT_MSECS); + unsigned long deadline = jiffies + tmo; + enum { + SMP_PHYWAIT_PHYDOWN, + SMP_PHYWAIT_PHYUP, + SMP_PHYWAIT_DONE + } phy_state = SMP_PHYWAIT_PHYDOWN; + + /* While there is time, wait for the phy to go away and come back */ + while (time_is_after_jiffies(deadline) && phy_state != SMP_PHYWAIT_DONE) { + int event = atomic_read(&iport->event); + + ++iteration; + + tmo = wait_event_timeout(ihost->eventq, + event != atomic_read(&iport->event) || + !test_bit(IPORT_BCN_BLOCKED, &iport->flags), + tmo); + /* link down, stop polling */ + if (!test_bit(IPORT_BCN_BLOCKED, &iport->flags)) + break; + + dev_dbg(&ihost->pdev->dev, + "%s: iport %p, iteration %d," + " phase %d: time_remaining %lu, bcns = %d\n", + __func__, iport, iteration, phy_state, + tmo, test_bit(IPORT_BCN_PENDING, &iport->flags)); + + res = isci_smp_get_phy_attached_dev_type(ihost, dev, phy_num, + &attached_device_type); + tmo = deadline - jiffies; + + if (res) { + dev_dbg(&ihost->pdev->dev, + "%s: iteration %d, phase %d:" + " SMP error=%d, time_remaining=%lu\n", + __func__, iteration, phy_state, res, tmo); + break; + } + dev_dbg(&ihost->pdev->dev, + "%s: iport %p, iteration %d," + " phase %d: time_remaining %lu, bcns = %d, " + "attdevtype = %x\n", + __func__, iport, iteration, phy_state, + tmo, test_bit(IPORT_BCN_PENDING, &iport->flags), + attached_device_type); + + switch (phy_state) { + case SMP_PHYWAIT_PHYDOWN: + /* Has the device gone away? */ + if (!attached_device_type) + phy_state = SMP_PHYWAIT_PHYUP; + + break; + + case SMP_PHYWAIT_PHYUP: + /* Has the device come back? */ + if (attached_device_type) + phy_state = SMP_PHYWAIT_DONE; + break; + + case SMP_PHYWAIT_DONE: + break; + } + + } + dev_dbg(&ihost->pdev->dev, "%s: done\n", __func__); +} + +static int isci_reset_device(struct isci_host *ihost, + struct isci_remote_device *idev) +{ + struct sas_phy *phy = sas_find_local_phy(idev->domain_dev); + struct isci_port *iport = idev->isci_port; + enum sci_status status; + unsigned long flags; + int rc; + + dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev); + + spin_lock_irqsave(&ihost->scic_lock, flags); + status = sci_remote_device_reset(idev); + if (status != SCI_SUCCESS) { + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + dev_dbg(&ihost->pdev->dev, + "%s: sci_remote_device_reset(%p) returned %d!\n", + __func__, idev, status); + + return TMF_RESP_FUNC_FAILED; + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + /* Make sure all pending requests are able to be fully terminated. */ + isci_device_clear_reset_pending(ihost, idev); + + /* If this is a device on an expander, disable BCN processing. */ + if (!scsi_is_sas_phy_local(phy)) + set_bit(IPORT_BCN_BLOCKED, &iport->flags); + + rc = sas_phy_reset(phy, true); + + /* Terminate in-progress I/O now. */ + isci_remote_device_nuke_requests(ihost, idev); + + /* Since all pending TCs have been cleaned, resume the RNC. */ + spin_lock_irqsave(&ihost->scic_lock, flags); + status = sci_remote_device_reset_complete(idev); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + /* If this is a device on an expander, bring the phy back up. */ + if (!scsi_is_sas_phy_local(phy)) { + /* A phy reset will cause the device to go away then reappear. + * Since libsas will take action on incoming BCNs (eg. remove + * a device going through an SMP phy-control driven reset), + * we need to wait until the phy comes back up before letting + * discovery proceed in libsas. + */ + isci_wait_for_smp_phy_reset(idev, phy->number); + + spin_lock_irqsave(&ihost->scic_lock, flags); + isci_port_bcn_enable(ihost, idev->isci_port); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + } + + if (status != SCI_SUCCESS) { + dev_dbg(&ihost->pdev->dev, + "%s: sci_remote_device_reset_complete(%p) " + "returned %d!\n", __func__, idev, status); + } + + dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev); + + return rc; +} + +int isci_task_I_T_nexus_reset(struct domain_device *dev) +{ + struct isci_host *ihost = dev_to_ihost(dev); + struct isci_remote_device *idev; + unsigned long flags; + int ret; + + spin_lock_irqsave(&ihost->scic_lock, flags); + idev = isci_lookup_device(dev); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (!idev || !test_bit(IDEV_EH, &idev->flags)) { + ret = TMF_RESP_FUNC_COMPLETE; + goto out; + } + + ret = isci_reset_device(ihost, idev); + out: + isci_put_device(idev); + return ret; +} + +int isci_bus_reset_handler(struct scsi_cmnd *cmd) +{ + struct domain_device *dev = sdev_to_domain_dev(cmd->device); + struct isci_host *ihost = dev_to_ihost(dev); + struct isci_remote_device *idev; + unsigned long flags; + int ret; + + spin_lock_irqsave(&ihost->scic_lock, flags); + idev = isci_lookup_device(dev); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (!idev) { + ret = TMF_RESP_FUNC_COMPLETE; + goto out; + } + + ret = isci_reset_device(ihost, idev); + out: + isci_put_device(idev); + return ret; +} diff --git a/drivers/scsi/isci/task.h b/drivers/scsi/isci/task.h new file mode 100644 index 000000000000..4a7fa90287ef --- /dev/null +++ b/drivers/scsi/isci/task.h @@ -0,0 +1,367 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _ISCI_TASK_H_ +#define _ISCI_TASK_H_ + +#include <scsi/sas_ata.h> +#include "host.h" + +struct isci_request; + +/** + * enum isci_tmf_cb_state - This enum defines the possible states in which the + * TMF callback function is invoked during the TMF execution process. + * + * + */ +enum isci_tmf_cb_state { + + isci_tmf_init_state = 0, + isci_tmf_started, + isci_tmf_timed_out +}; + +/** + * enum isci_tmf_function_codes - This enum defines the possible preparations + * of task management requests. + * + * + */ +enum isci_tmf_function_codes { + + isci_tmf_func_none = 0, + isci_tmf_ssp_task_abort = TMF_ABORT_TASK, + isci_tmf_ssp_lun_reset = TMF_LU_RESET, + isci_tmf_sata_srst_high = TMF_LU_RESET + 0x100, /* Non SCSI */ + isci_tmf_sata_srst_low = TMF_LU_RESET + 0x101 /* Non SCSI */ +}; +/** + * struct isci_tmf - This class represents the task management object which + * acts as an interface to libsas for processing task management requests + * + * + */ +struct isci_tmf { + + struct completion *complete; + enum sas_protocol proto; + union { + struct ssp_response_iu resp_iu; + struct dev_to_host_fis d2h_fis; + u8 rsp_buf[SSP_RESP_IU_MAX_SIZE]; + } resp; + unsigned char lun[8]; + u16 io_tag; + struct isci_remote_device *device; + enum isci_tmf_function_codes tmf_code; + int status; + + /* The optional callback function allows the user process to + * track the TMF transmit / timeout conditions. + */ + void (*cb_state_func)( + enum isci_tmf_cb_state, + struct isci_tmf *, void *); + void *cb_data; + +}; + +static inline void isci_print_tmf(struct isci_tmf *tmf) +{ + if (SAS_PROTOCOL_SATA == tmf->proto) + dev_dbg(&tmf->device->isci_port->isci_host->pdev->dev, + "%s: status = %x\n" + "tmf->resp.d2h_fis.status = %x\n" + "tmf->resp.d2h_fis.error = %x\n", + __func__, + tmf->status, + tmf->resp.d2h_fis.status, + tmf->resp.d2h_fis.error); + else + dev_dbg(&tmf->device->isci_port->isci_host->pdev->dev, + "%s: status = %x\n" + "tmf->resp.resp_iu.data_present = %x\n" + "tmf->resp.resp_iu.status = %x\n" + "tmf->resp.resp_iu.data_length = %x\n" + "tmf->resp.resp_iu.data[0] = %x\n" + "tmf->resp.resp_iu.data[1] = %x\n" + "tmf->resp.resp_iu.data[2] = %x\n" + "tmf->resp.resp_iu.data[3] = %x\n", + __func__, + tmf->status, + tmf->resp.resp_iu.datapres, + tmf->resp.resp_iu.status, + be32_to_cpu(tmf->resp.resp_iu.response_data_len), + tmf->resp.resp_iu.resp_data[0], + tmf->resp.resp_iu.resp_data[1], + tmf->resp.resp_iu.resp_data[2], + tmf->resp.resp_iu.resp_data[3]); +} + + +int isci_task_execute_task( + struct sas_task *task, + int num, + gfp_t gfp_flags); + +int isci_task_abort_task( + struct sas_task *task); + +int isci_task_abort_task_set( + struct domain_device *d_device, + u8 *lun); + +int isci_task_clear_aca( + struct domain_device *d_device, + u8 *lun); + +int isci_task_clear_task_set( + struct domain_device *d_device, + u8 *lun); + +int isci_task_query_task( + struct sas_task *task); + +int isci_task_lu_reset( + struct domain_device *d_device, + u8 *lun); + +int isci_task_clear_nexus_port( + struct asd_sas_port *port); + +int isci_task_clear_nexus_ha( + struct sas_ha_struct *ha); + +int isci_task_I_T_nexus_reset( + struct domain_device *d_device); + +void isci_task_request_complete( + struct isci_host *isci_host, + struct isci_request *request, + enum sci_task_status completion_status); + +u16 isci_task_ssp_request_get_io_tag_to_manage( + struct isci_request *request); + +u8 isci_task_ssp_request_get_function( + struct isci_request *request); + + +void *isci_task_ssp_request_get_response_data_address( + struct isci_request *request); + +u32 isci_task_ssp_request_get_response_data_length( + struct isci_request *request); + +int isci_queuecommand( + struct scsi_cmnd *scsi_cmd, + void (*donefunc)(struct scsi_cmnd *)); + +int isci_bus_reset_handler(struct scsi_cmnd *cmd); + +/** + * enum isci_completion_selection - This enum defines the possible actions to + * take with respect to a given request's notification back to libsas. + * + * + */ +enum isci_completion_selection { + + isci_perform_normal_io_completion, /* Normal notify (task_done) */ + isci_perform_aborted_io_completion, /* No notification. */ + isci_perform_error_io_completion /* Use sas_task_abort */ +}; + +static inline void isci_set_task_doneflags( + struct sas_task *task) +{ + /* Since no futher action will be taken on this task, + * make sure to mark it complete from the lldd perspective. + */ + task->task_state_flags |= SAS_TASK_STATE_DONE; + task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; + task->task_state_flags &= ~SAS_TASK_STATE_PENDING; +} +/** + * isci_task_all_done() - This function clears the task bits to indicate the + * LLDD is done with the task. + * + * + */ +static inline void isci_task_all_done( + struct sas_task *task) +{ + unsigned long flags; + + /* Since no futher action will be taken on this task, + * make sure to mark it complete from the lldd perspective. + */ + spin_lock_irqsave(&task->task_state_lock, flags); + isci_set_task_doneflags(task); + spin_unlock_irqrestore(&task->task_state_lock, flags); +} + +/** + * isci_task_set_completion_status() - This function sets the completion status + * for the request. + * @task: This parameter is the completed request. + * @response: This parameter is the response code for the completed task. + * @status: This parameter is the status code for the completed task. + * +* @return The new notification mode for the request. +*/ +static inline enum isci_completion_selection +isci_task_set_completion_status( + struct sas_task *task, + enum service_response response, + enum exec_status status, + enum isci_completion_selection task_notification_selection) +{ + unsigned long flags; + + spin_lock_irqsave(&task->task_state_lock, flags); + + /* If a device reset is being indicated, make sure the I/O + * is in the error path. + */ + if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) { + /* Fail the I/O to make sure it goes into the error path. */ + response = SAS_TASK_UNDELIVERED; + status = SAM_STAT_TASK_ABORTED; + + task_notification_selection = isci_perform_error_io_completion; + } + task->task_status.resp = response; + task->task_status.stat = status; + + switch (task_notification_selection) { + + case isci_perform_error_io_completion: + + if (task->task_proto == SAS_PROTOCOL_SMP) { + /* There is no error escalation in the SMP case. + * Convert to a normal completion to avoid the + * timeout in the discovery path and to let the + * next action take place quickly. + */ + task_notification_selection + = isci_perform_normal_io_completion; + + /* Fall through to the normal case... */ + } else { + /* Use sas_task_abort */ + /* Leave SAS_TASK_STATE_DONE clear + * Leave SAS_TASK_AT_INITIATOR set. + */ + break; + } + + case isci_perform_aborted_io_completion: + /* This path can occur with task-managed requests as well as + * requests terminated because of LUN or device resets. + */ + /* Fall through to the normal case... */ + case isci_perform_normal_io_completion: + /* Normal notification (task_done) */ + isci_set_task_doneflags(task); + break; + default: + WARN_ONCE(1, "unknown task_notification_selection: %d\n", + task_notification_selection); + break; + } + + spin_unlock_irqrestore(&task->task_state_lock, flags); + + return task_notification_selection; + +} +/** +* isci_execpath_callback() - This function is called from the task +* execute path when the task needs to callback libsas about the submit-time +* task failure. The callback occurs either through the task's done function +* or through sas_task_abort. In the case of regular non-discovery SATA/STP I/O +* requests, libsas takes the host lock before calling execute task. Therefore +* in this situation the host lock must be managed before calling the func. +* +* @ihost: This parameter is the controller to which the I/O request was sent. +* @task: This parameter is the I/O request. +* @func: This parameter is the function to call in the correct context. +* @status: This parameter is the status code for the completed task. +* +*/ +static inline void isci_execpath_callback(struct isci_host *ihost, + struct sas_task *task, + void (*func)(struct sas_task *)) +{ + struct domain_device *dev = task->dev; + + if (dev_is_sata(dev) && task->uldd_task) { + unsigned long flags; + + /* Since we are still in the submit path, and since + * libsas takes the host lock on behalf of SATA + * devices before I/O starts (in the non-discovery case), + * we need to unlock before we can call the callback function. + */ + raw_local_irq_save(flags); + spin_unlock(dev->sata_dev.ap->lock); + func(task); + spin_lock(dev->sata_dev.ap->lock); + raw_local_irq_restore(flags); + } else + func(task); +} +#endif /* !defined(_SCI_TASK_H_) */ diff --git a/drivers/scsi/isci/unsolicited_frame_control.c b/drivers/scsi/isci/unsolicited_frame_control.c new file mode 100644 index 000000000000..e9e1e2abacb9 --- /dev/null +++ b/drivers/scsi/isci/unsolicited_frame_control.c @@ -0,0 +1,225 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "host.h" +#include "unsolicited_frame_control.h" +#include "registers.h" + +int sci_unsolicited_frame_control_construct(struct isci_host *ihost) +{ + struct sci_unsolicited_frame_control *uf_control = &ihost->uf_control; + struct sci_unsolicited_frame *uf; + u32 buf_len, header_len, i; + dma_addr_t dma; + size_t size; + void *virt; + + /* + * Prepare all of the memory sizes for the UF headers, UF address + * table, and UF buffers themselves. + */ + buf_len = SCU_MAX_UNSOLICITED_FRAMES * SCU_UNSOLICITED_FRAME_BUFFER_SIZE; + header_len = SCU_MAX_UNSOLICITED_FRAMES * sizeof(struct scu_unsolicited_frame_header); + size = buf_len + header_len + SCU_MAX_UNSOLICITED_FRAMES * sizeof(dma_addr_t); + + /* + * The Unsolicited Frame buffers are set at the start of the UF + * memory descriptor entry. The headers and address table will be + * placed after the buffers. + */ + virt = dmam_alloc_coherent(&ihost->pdev->dev, size, &dma, GFP_KERNEL); + if (!virt) + return -ENOMEM; + + /* + * Program the location of the UF header table into the SCU. + * Notes: + * - The address must align on a 64-byte boundary. Guaranteed to be + * on 64-byte boundary already 1KB boundary for unsolicited frames. + * - Program unused header entries to overlap with the last + * unsolicited frame. The silicon will never DMA to these unused + * headers, since we program the UF address table pointers to + * NULL. + */ + uf_control->headers.physical_address = dma + buf_len; + uf_control->headers.array = virt + buf_len; + + /* + * Program the location of the UF address table into the SCU. + * Notes: + * - The address must align on a 64-bit boundary. Guaranteed to be on 64 + * byte boundary already due to above programming headers being on a + * 64-bit boundary and headers are on a 64-bytes in size. + */ + uf_control->address_table.physical_address = dma + buf_len + header_len; + uf_control->address_table.array = virt + buf_len + header_len; + uf_control->get = 0; + + /* + * UF buffer requirements are: + * - The last entry in the UF queue is not NULL. + * - There is a power of 2 number of entries (NULL or not-NULL) + * programmed into the queue. + * - Aligned on a 1KB boundary. */ + + /* + * Program the actual used UF buffers into the UF address table and + * the controller's array of UFs. + */ + for (i = 0; i < SCU_MAX_UNSOLICITED_FRAMES; i++) { + uf = &uf_control->buffers.array[i]; + + uf_control->address_table.array[i] = dma; + + uf->buffer = virt; + uf->header = &uf_control->headers.array[i]; + uf->state = UNSOLICITED_FRAME_EMPTY; + + /* + * Increment the address of the physical and virtual memory + * pointers. Everything is aligned on 1k boundary with an + * increment of 1k. + */ + virt += SCU_UNSOLICITED_FRAME_BUFFER_SIZE; + dma += SCU_UNSOLICITED_FRAME_BUFFER_SIZE; + } + + return 0; +} + +enum sci_status sci_unsolicited_frame_control_get_header(struct sci_unsolicited_frame_control *uf_control, + u32 frame_index, + void **frame_header) +{ + if (frame_index < SCU_MAX_UNSOLICITED_FRAMES) { + /* Skip the first word in the frame since this is a controll word used + * by the hardware. + */ + *frame_header = &uf_control->buffers.array[frame_index].header->data; + + return SCI_SUCCESS; + } + + return SCI_FAILURE_INVALID_PARAMETER_VALUE; +} + +enum sci_status sci_unsolicited_frame_control_get_buffer(struct sci_unsolicited_frame_control *uf_control, + u32 frame_index, + void **frame_buffer) +{ + if (frame_index < SCU_MAX_UNSOLICITED_FRAMES) { + *frame_buffer = uf_control->buffers.array[frame_index].buffer; + + return SCI_SUCCESS; + } + + return SCI_FAILURE_INVALID_PARAMETER_VALUE; +} + +bool sci_unsolicited_frame_control_release_frame(struct sci_unsolicited_frame_control *uf_control, + u32 frame_index) +{ + u32 frame_get; + u32 frame_cycle; + + frame_get = uf_control->get & (SCU_MAX_UNSOLICITED_FRAMES - 1); + frame_cycle = uf_control->get & SCU_MAX_UNSOLICITED_FRAMES; + + /* + * In the event there are NULL entries in the UF table, we need to + * advance the get pointer in order to find out if this frame should + * be released (i.e. update the get pointer) + */ + while (lower_32_bits(uf_control->address_table.array[frame_get]) == 0 && + upper_32_bits(uf_control->address_table.array[frame_get]) == 0 && + frame_get < SCU_MAX_UNSOLICITED_FRAMES) + frame_get++; + + /* + * The table has a NULL entry as it's last element. This is + * illegal. + */ + BUG_ON(frame_get >= SCU_MAX_UNSOLICITED_FRAMES); + if (frame_index >= SCU_MAX_UNSOLICITED_FRAMES) + return false; + + uf_control->buffers.array[frame_index].state = UNSOLICITED_FRAME_RELEASED; + + if (frame_get != frame_index) { + /* + * Frames remain in use until we advance the get pointer + * so there is nothing we can do here + */ + return false; + } + + /* + * The frame index is equal to the current get pointer so we + * can now free up all of the frame entries that + */ + while (uf_control->buffers.array[frame_get].state == UNSOLICITED_FRAME_RELEASED) { + uf_control->buffers.array[frame_get].state = UNSOLICITED_FRAME_EMPTY; + + if (frame_get+1 == SCU_MAX_UNSOLICITED_FRAMES-1) { + frame_cycle ^= SCU_MAX_UNSOLICITED_FRAMES; + frame_get = 0; + } else + frame_get++; + } + + uf_control->get = SCU_UFQGP_GEN_BIT(ENABLE_BIT) | frame_cycle | frame_get; + + return true; +} diff --git a/drivers/scsi/isci/unsolicited_frame_control.h b/drivers/scsi/isci/unsolicited_frame_control.h new file mode 100644 index 000000000000..31cb9506f52d --- /dev/null +++ b/drivers/scsi/isci/unsolicited_frame_control.h @@ -0,0 +1,278 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_ +#define _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_ + +#include "isci.h" + +#define SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS 15 + +/** + * struct scu_unsolicited_frame_header - + * + * This structure delineates the format of an unsolicited frame header. The + * first DWORD are UF attributes defined by the silicon architecture. The data + * depicts actual header information received on the link. + */ +struct scu_unsolicited_frame_header { + /** + * This field indicates if there is an Initiator Index Table entry with + * which this header is associated. + */ + u32 iit_exists:1; + + /** + * This field simply indicates the protocol type (i.e. SSP, STP, SMP). + */ + u32 protocol_type:3; + + /** + * This field indicates if the frame is an address frame (IAF or OAF) + * or if it is a information unit frame. + */ + u32 is_address_frame:1; + + /** + * This field simply indicates the connection rate at which the frame + * was received. + */ + u32 connection_rate:4; + + u32 reserved:23; + + /** + * This field represents the actual header data received on the link. + */ + u32 data[SCU_UNSOLICITED_FRAME_HEADER_DATA_DWORDS]; + +}; + + + +/** + * enum unsolicited_frame_state - + * + * This enumeration represents the current unsolicited frame state. The + * controller object can not updtate the hardware unsolicited frame put pointer + * unless it has already processed the priror unsolicited frames. + */ +enum unsolicited_frame_state { + /** + * This state is when the frame is empty and not in use. It is + * different from the released state in that the hardware could DMA + * data to this frame buffer. + */ + UNSOLICITED_FRAME_EMPTY, + + /** + * This state is set when the frame buffer is in use by by some + * object in the system. + */ + UNSOLICITED_FRAME_IN_USE, + + /** + * This state is set when the frame is returned to the free pool + * but one or more frames prior to this one are still in use. + * Once all of the frame before this one are freed it will go to + * the empty state. + */ + UNSOLICITED_FRAME_RELEASED, + + UNSOLICITED_FRAME_MAX_STATES +}; + +/** + * struct sci_unsolicited_frame - + * + * This is the unsolicited frame data structure it acts as the container for + * the current frame state, frame header and frame buffer. + */ +struct sci_unsolicited_frame { + /** + * This field contains the current frame state + */ + enum unsolicited_frame_state state; + + /** + * This field points to the frame header data. + */ + struct scu_unsolicited_frame_header *header; + + /** + * This field points to the frame buffer data. + */ + void *buffer; + +}; + +/** + * struct sci_uf_header_array - + * + * This structure contains all of the unsolicited frame header information. + */ +struct sci_uf_header_array { + /** + * This field is represents a virtual pointer to the start + * address of the UF address table. The table contains + * 64-bit pointers as required by the hardware. + */ + struct scu_unsolicited_frame_header *array; + + /** + * This field specifies the physical address location for the UF + * buffer array. + */ + dma_addr_t physical_address; + +}; + +/** + * struct sci_uf_buffer_array - + * + * This structure contains all of the unsolicited frame buffer (actual payload) + * information. + */ +struct sci_uf_buffer_array { + /** + * This field is the unsolicited frame data its used to manage + * the data for the unsolicited frame requests. It also represents + * the virtual address location that corresponds to the + * physical_address field. + */ + struct sci_unsolicited_frame array[SCU_MAX_UNSOLICITED_FRAMES]; + + /** + * This field specifies the physical address location for the UF + * buffer array. + */ + dma_addr_t physical_address; +}; + +/** + * struct sci_uf_address_table_array - + * + * This object maintains all of the unsolicited frame address table specific + * data. The address table is a collection of 64-bit pointers that point to + * 1KB buffers into which the silicon will DMA unsolicited frames. + */ +struct sci_uf_address_table_array { + /** + * This field represents a virtual pointer that refers to the + * starting address of the UF address table. + * 64-bit pointers are required by the hardware. + */ + dma_addr_t *array; + + /** + * This field specifies the physical address location for the UF + * address table. + */ + dma_addr_t physical_address; + +}; + +/** + * struct sci_unsolicited_frame_control - + * + * This object contains all of the data necessary to handle unsolicited frames. + */ +struct sci_unsolicited_frame_control { + /** + * This field is the software copy of the unsolicited frame queue + * get pointer. The controller object writes this value to the + * hardware to let the hardware put more unsolicited frame entries. + */ + u32 get; + + /** + * This field contains all of the unsolicited frame header + * specific fields. + */ + struct sci_uf_header_array headers; + + /** + * This field contains all of the unsolicited frame buffer + * specific fields. + */ + struct sci_uf_buffer_array buffers; + + /** + * This field contains all of the unsolicited frame address table + * specific fields. + */ + struct sci_uf_address_table_array address_table; + +}; + +struct isci_host; + +int sci_unsolicited_frame_control_construct(struct isci_host *ihost); + +enum sci_status sci_unsolicited_frame_control_get_header( + struct sci_unsolicited_frame_control *uf_control, + u32 frame_index, + void **frame_header); + +enum sci_status sci_unsolicited_frame_control_get_buffer( + struct sci_unsolicited_frame_control *uf_control, + u32 frame_index, + void **frame_buffer); + +bool sci_unsolicited_frame_control_release_frame( + struct sci_unsolicited_frame_control *uf_control, + u32 frame_index); + +#endif /* _SCIC_SDS_UNSOLICITED_FRAME_CONTROL_H_ */ |