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|
/*
* 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 "intel_sas.h"
#include "sci_base_state_machine.h"
#include "scic_controller.h"
#include "scic_remote_device.h"
#include "scic_sds_controller.h"
#include "scic_sds_remote_device.h"
#include "scic_sds_request.h"
#include "scic_sds_smp_request.h"
#include "sci_environment.h"
#include "sci_util.h"
#include "scu_completion_codes.h"
#include "scu_task_context.h"
static void scu_smp_request_construct_task_context(
struct scic_sds_request *sci_req,
struct smp_request *smp_request);
/**
*
*
* This method return the memory space required for STP PIO requests. u32
*/
u32 scic_sds_smp_request_get_object_size(void)
{
return sizeof(struct scic_sds_request)
+ sizeof(struct smp_request)
+ sizeof(struct smp_response)
+ sizeof(struct scu_task_context)
+ SMP_CACHE_BYTES;
}
/**
* scic_sds_smp_request_get_command_buffer() -
*
* This macro returns the address of the smp command buffer in the smp request
* memory. No need to cast to SMP request type.
*/
#define scic_sds_smp_request_get_command_buffer(memory) \
(((char *)(memory)) + sizeof(struct scic_sds_request))
/**
* scic_sds_smp_request_get_response_buffer() -
*
* This macro returns the address of the smp response buffer in the smp request
* memory.
*/
#define scic_sds_smp_request_get_response_buffer(memory) \
(((char *)(scic_sds_smp_request_get_command_buffer(memory))) \
+ sizeof(struct smp_request))
/**
* scic_sds_smp_request_get_task_context_buffer() -
*
* This macro returs the task context buffer for the SMP request.
*/
#define scic_sds_smp_request_get_task_context_buffer(memory) \
((struct scu_task_context *)(\
((char *)(scic_sds_smp_request_get_response_buffer(memory))) \
+ sizeof(struct smp_response) \
))
/**
* This method build the remainder of the IO request object.
* @sci_req: This parameter specifies the request object being constructed.
*
* The scic_sds_general_request_construct() must be called before this call is
* valid. none
*/
void scic_sds_smp_request_assign_buffers(
struct scic_sds_request *sci_req)
{
/* Assign all of the buffer pointers */
sci_req->command_buffer =
scic_sds_smp_request_get_command_buffer(sci_req);
sci_req->response_buffer =
scic_sds_smp_request_get_response_buffer(sci_req);
sci_req->sgl_element_pair_buffer = NULL;
if (sci_req->was_tag_assigned_by_user == false) {
sci_req->task_context_buffer =
scic_sds_smp_request_get_task_context_buffer(sci_req);
sci_req->task_context_buffer =
PTR_ALIGN(sci_req->task_context_buffer, SMP_CACHE_BYTES);
}
}
/**
* This method is called by the SCI user to build an SMP pass-through IO
* request.
* @scic_smp_request: This parameter specifies the handle to the io request
* object to be built.
* @passthru_cb: This parameter specifies the pointer to the callback structure
* that contains the function pointers
*
* - The user must have previously called scic_io_request_construct() on the
* supplied IO request. Indicate if the controller successfully built the IO
* request.
*/
/**
* This method will fill in the SCU Task Context for a SMP request. The
* following important settings are utilized: -# task_type ==
* SCU_TASK_TYPE_SMP. 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 smp request frame.
* @sci_req: This parameter specifies the smp request object being
* constructed.
*
*/
static void scu_smp_request_construct_task_context(
struct scic_sds_request *sds_request,
struct smp_request *smp_request)
{
dma_addr_t dma_addr;
struct scic_sds_controller *controller;
struct scic_sds_remote_device *sci_dev;
struct scic_sds_port *target_port;
struct scu_task_context *task_context;
/* byte swap the smp request. */
scic_word_copy_with_swap(sds_request->command_buffer,
(u32 *)smp_request,
sizeof(struct smp_request) / sizeof(u32));
task_context = scic_sds_request_get_task_context(sds_request);
controller = scic_sds_request_get_controller(sds_request);
sci_dev = scic_sds_request_get_device(sds_request);
target_port = scic_sds_request_get_port(sds_request);
/*
* Fill in the TC with the its required data
* 00h
*/
task_context->priority = 0;
task_context->initiator_request = 1;
task_context->connection_rate =
scic_remote_device_get_connection_rate(sci_dev);
task_context->protocol_engine_index =
scic_sds_controller_get_protocol_engine_group(controller);
task_context->logical_port_index =
scic_sds_port_get_index(target_port);
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 = sci_dev->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 =
smp_request->header.request_length;
/* 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((void *)(&task_context->type.smp),
sds_request->command_buffer,
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;
if (sds_request->was_tag_assigned_by_user) {
/*
* Build the task context now since we have already read
* the data
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
scic_sds_io_tag_get_index(sds_request->io_tag));
} else {
/*
* Build the task context now since we have already read
* the data.
* I/O tag index is not assigned because we have to wait
* until we get a TCi.
*/
sds_request->post_context =
(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
(scic_sds_controller_get_protocol_engine_group(
controller) <<
SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
(scic_sds_port_get_index(target_port) <<
SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
}
/*
* Copy the physical address for the command buffer to the SCU Task
* Context command buffer should not contain command header.
*/
dma_addr = scic_io_request_get_dma_addr(sds_request,
(char *)
(sds_request->command_buffer) +
sizeof(u32));
task_context->command_iu_upper = upper_32_bits(dma_addr);
task_context->command_iu_lower = lower_32_bits(dma_addr);
/* 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;
}
/**
* This method processes an unsolicited frame while the SMP request is waiting
* for a response frame. It will copy the response data, release the
* unsolicited frame, and transition the request to the
* SCI_BASE_REQUEST_STATE_COMPLETED state.
* @sci_req: This parameter specifies the request for which the
* unsolicited frame was received.
* @frame_index: This parameter indicates the unsolicited frame index that
* should contain the response.
*
* This method returns an indication of whether the response frame was handled
* successfully or not. SCI_SUCCESS Currently this value is always returned and
* indicates successful processing of the TC response.
*/
static enum sci_status scic_sds_smp_request_await_response_frame_handler(
struct scic_sds_request *sci_req,
u32 frame_index)
{
enum sci_status status;
void *frame_header;
struct smp_response_header *rsp_hdr;
u8 *user_smp_buffer = sci_req->response_buffer;
status = scic_sds_unsolicited_frame_control_get_header(
&(scic_sds_request_get_controller(sci_req)->uf_control),
frame_index,
&frame_header
);
/* byte swap the header. */
scic_word_copy_with_swap(
(u32 *)user_smp_buffer,
frame_header,
sizeof(struct smp_response_header) / sizeof(u32)
);
rsp_hdr = (struct smp_response_header *)user_smp_buffer;
if (rsp_hdr->smp_frame_type == SMP_FRAME_TYPE_RESPONSE) {
void *smp_response_buffer;
status = scic_sds_unsolicited_frame_control_get_buffer(
&(scic_sds_request_get_controller(sci_req)->uf_control),
frame_index,
&smp_response_buffer
);
scic_word_copy_with_swap(
(u32 *)(user_smp_buffer + sizeof(struct smp_response_header)),
smp_response_buffer,
sizeof(union smp_response_body) / sizeof(u32)
);
if (rsp_hdr->function == SMP_FUNCTION_DISCOVER) {
struct smp_response *smp_resp;
smp_resp = (struct smp_response *)user_smp_buffer;
/*
* Some expanders only report an attached SATA device, and
* not an STP target. Since the core depends on the STP
* target attribute to correctly build I/O, set the bit now
* if necessary. */
if (smp_resp->response.discover.protocols.u.bits.attached_sata_device
&& !smp_resp->response.discover.protocols.u.bits.attached_stp_target) {
smp_resp->response.discover.protocols.u.bits.attached_stp_target = 1;
dev_dbg(scic_to_dev(sci_req->owning_controller),
"%s: scic_sds_smp_request_await_response_frame_handler(0x%p) Found SATA dev, setting STP bit.\n",
__func__, sci_req);
}
}
/*
* Don't need to copy to user space. User instead will refer to
* core request's response buffer. */
/*
* copy the smp response to framework smp request's response buffer.
* scic_sds_smp_request_copy_response(sci_req); */
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&sci_req->started_substate_machine,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION
);
} else {
/* This was not a response frame why did it get forwarded? */
dev_err(scic_to_dev(sci_req->owning_controller),
"%s: SCIC SMP Request 0x%p received unexpected frame "
"%d type 0x%02x\n",
__func__,
sci_req,
frame_index,
rsp_hdr->smp_frame_type);
scic_sds_request_set_status(
sci_req,
SCU_TASK_DONE_SMP_FRM_TYPE_ERR,
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED
);
}
scic_sds_controller_release_frame(
sci_req->owning_controller, frame_index
);
return SCI_SUCCESS;
}
/**
* This method processes an abnormal TC completion while the SMP request is
* waiting for a response frame. It decides what happened to the IO based
* on TC completion status.
* @sci_req: This parameter specifies the request for which the TC
* completion was received.
* @completion_code: This parameter indicates the completion status information
* for the TC.
*
* Indicate if the tc completion handler was successful. SCI_SUCCESS currently
* this method always returns success.
*/
static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler(
struct scic_sds_request *sci_req,
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. */
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_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 scic user to retry the request. */
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_SMP_RESP_TO_ERR, SCI_FAILURE_RETRY_REQUIRED
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_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. */
scic_sds_request_set_status(
sci_req,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
}
return SCI_SUCCESS;
}
/**
* This method processes the completions transport layer (TL) status to
* determine if the SMP request was sent successfully. If the SMP request
* was sent successfully, then the state for the SMP request transits to
* waiting for a response frame.
* @sci_req: This parameter specifies the request for which the TC
* completion was received.
* @completion_code: This parameter indicates the completion status information
* for the TC.
*
* Indicate if the tc completion handler was successful. SCI_SUCCESS currently
* this method always returns success.
*/
static enum sci_status scic_sds_smp_request_await_tc_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
u32 completion_code)
{
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
scic_sds_request_set_status(
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_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. */
scic_sds_request_set_status(
sci_req,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
);
sci_base_state_machine_change_state(
&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
}
return SCI_SUCCESS;
}
static const struct scic_sds_io_request_state_handler scic_sds_smp_request_started_substate_handler_table[] = {
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_smp_request_await_response_tc_completion_handler,
.frame_handler = scic_sds_smp_request_await_response_frame_handler,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_smp_request_await_tc_completion_tc_completion_handler,
}
};
/**
* This method performs the actions required when entering the
* SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_RESPONSE sub-state. This
* includes setting the IO request state handlers for this sub-state.
* @object: This parameter specifies the request object for which the sub-state
* change is occuring.
*
* none.
*/
static void scic_sds_smp_request_started_await_response_substate_enter(
struct sci_base_object *object)
{
struct scic_sds_request *sci_req = (struct scic_sds_request *)object;
SET_STATE_HANDLER(
sci_req,
scic_sds_smp_request_started_substate_handler_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE
);
}
/**
* This method performs the actions required when entering the
* SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION sub-state.
* This includes setting the SMP request state handlers for this sub-state.
* @object: This parameter specifies the request object for which the sub-state
* change is occuring.
*
* none.
*/
static void scic_sds_smp_request_started_await_tc_completion_substate_enter(
struct sci_base_object *object)
{
struct scic_sds_request *sci_req = (struct scic_sds_request *)object;
SET_STATE_HANDLER(
sci_req,
scic_sds_smp_request_started_substate_handler_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION
);
}
static const struct sci_base_state scic_sds_smp_request_started_substate_table[] = {
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE] = {
.enter_state = scic_sds_smp_request_started_await_response_substate_enter,
},
[SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION] = {
.enter_state = scic_sds_smp_request_started_await_tc_completion_substate_enter,
},
};
/**
* This method is called by the SCI user to build an SMP IO request.
*
* - The user must have previously called scic_io_request_construct() on the
* supplied IO request. Indicate if the controller successfully built the IO
* request. SCI_SUCCESS This value is returned if the IO request was
* successfully built. SCI_FAILURE_UNSUPPORTED_PROTOCOL This value is returned
* if the remote_device does not support the SMP protocol.
* SCI_FAILURE_INVALID_ASSOCIATION This value is returned if the user did not
* properly set the association between the SCIC IO request and the user's IO
* request. Please refer to the sci_object_set_association() routine for more
* information.
*/
enum sci_status scic_io_request_construct_smp(struct scic_sds_request *sci_req)
{
struct smp_request *smp_req = kmalloc(sizeof(*smp_req), GFP_KERNEL);
if (!smp_req)
return SCI_FAILURE_INSUFFICIENT_RESOURCES;
sci_req->protocol = SCIC_SMP_PROTOCOL;
sci_req->has_started_substate_machine = true;
/* Construct the started sub-state machine. */
sci_base_state_machine_construct(
&sci_req->started_substate_machine,
&sci_req->parent,
scic_sds_smp_request_started_substate_table,
SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE
);
/* Construct the SMP SCU Task Context */
memcpy(smp_req, sci_req->command_buffer, sizeof(*smp_req));
/*
* 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->header.request_length == 0) {
switch (smp_req->header.function) {
case SMP_FUNCTION_DISCOVER:
case SMP_FUNCTION_REPORT_PHY_ERROR_LOG:
case SMP_FUNCTION_REPORT_PHY_SATA:
case SMP_FUNCTION_REPORT_ROUTE_INFORMATION:
smp_req->header.request_length = 2;
break;
case SMP_FUNCTION_CONFIGURE_ROUTE_INFORMATION:
case SMP_FUNCTION_PHY_CONTROL:
case SMP_FUNCTION_PHY_TEST:
smp_req->header.request_length = 9;
break;
/* Default - zero is a valid default for 2.0. */
}
}
scu_smp_request_construct_task_context(sci_req, smp_req);
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_CONSTRUCTED);
kfree(smp_req);
return SCI_SUCCESS;
}
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