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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.
*/
#ifndef _SCIC_SDS_CONTROLLER_H_
#define _SCIC_SDS_CONTROLLER_H_
#include <linux/string.h>
#include <linux/io.h>
/**
* This file contains the structures, constants and prototypes used for the
* core controller object.
*
*
*/
#include "sci_pool.h"
#include "sci_controller_constants.h"
#include "sci_base_state.h"
#include "sci_base_state_machine.h"
#include "scic_config_parameters.h"
#include "scic_sds_port.h"
#include "scic_sds_phy.h"
#include "scic_sds_remote_node_table.h"
#include "scu_registers.h"
#include "scu_constants.h"
#include "scu_remote_node_context.h"
#include "scu_task_context.h"
#include "scu_unsolicited_frame.h"
#include "scic_sds_unsolicited_frame_control.h"
#include "scic_sds_port_configuration_agent.h"
struct sci_base_remote_device;
struct scic_sds_remote_device;
struct scic_sds_request;
struct scic_sds_controller;
/**
* struct scic_power_control -
*
* This structure defines the fields for managing power control for direct
* attached disk devices.
*/
struct scic_power_control {
/**
* This field is set when the power control timer is running and cleared when
* it is not.
*/
bool timer_started;
/**
* This field is the handle to the driver timer object. This timer is used to
* control when the directed attached disks can consume power.
*/
void *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 scic_sds_phy.phy_index
*/
struct scic_sds_phy *requesters[SCI_MAX_PHYS];
};
/**
* struct scic_sds_controller -
*
* This structure represents the SCU contoller object.
*/
struct scic_sds_controller {
/**
* The field specifies that the parent object for the base controller
* is the base object itself.
*/
struct sci_base_object parent;
/**
* This field contains the information for the base controller state
* machine.
*/
struct sci_base_state_machine state_machine;
/**
* This field is the driver timer object handler used to time the controller
* object start and stop requests.
*/
void *timeout_timer;
/**
* This field contains the user parameters to be utilized for this
* core controller object.
*/
union scic_user_parameters user_parameters;
/**
* This field contains the OEM parameters to be utilized for this
* core controller object.
*/
union scic_oem_parameters oem_parameters;
/**
* This field contains the port configuration agent for this controller.
*/
struct scic_sds_port_configuration_agent port_agent;
/**
* This field is the array of port objects that are controlled by this
* controller object. There is one dummy port object also contained within
* this controller object.
*/
struct scic_sds_port port_table[SCI_MAX_PORTS + 1];
/**
* This field is the array of phy objects that are controlled by this
* controller object.
*/
struct scic_sds_phy phy_table[SCI_MAX_PHYS];
/**
* This field is the array of device objects that are currently constructed
* for this controller object. This table is used as a fast lookup of device
* objects that need to handle device completion notifications from the
* hardware. The table is RNi based.
*/
struct scic_sds_remote_device *device_table[SCI_MAX_REMOTE_DEVICES];
/**
* This field is the array of IO request objects that are currently active for
* this controller object. This table is used as a fast lookup of the io
* request object that need to handle completion queue notifications. The
* table is TCi based.
*/
struct scic_sds_request *io_request_table[SCI_MAX_IO_REQUESTS];
/**
* This field is the free RNi data structure
*/
struct scic_remote_node_table available_remote_nodes;
/**
* This field is the TCi pool used to manage the task context index.
*/
SCI_POOL_CREATE(tci_pool, u16, SCI_MAX_IO_REQUESTS);
/**
* This filed is the struct scic_power_control data used to controll when direct
* attached devices can consume power.
*/
struct scic_power_control power_control;
/**
* This field is the array of sequence values for the IO Tag fields. Even
* though only 4 bits of the field is used for the sequence the sequence is 16
* bits in size so the sequence can be bitwise or'd with the TCi to build the
* IO Tag value.
*/
u16 io_request_sequence[SCI_MAX_IO_REQUESTS];
/**
* This field in the array of sequence values for the RNi. These are used
* to control io request build to io request start operations. The sequence
* value is recorded into an io request when it is built and is checked on
* the io request start operation to make sure that there was not a device
* hot plug between the build and start operation.
*/
u8 remote_device_sequence[SCI_MAX_REMOTE_DEVICES];
/**
* This field is a pointer to the memory allocated by the driver for the task
* context table. This data is shared between the hardware and software.
*/
struct scu_task_context *task_context_table;
/**
* This field is a pointer to the memory allocated by the driver for the
* remote node context table. This table is shared between the hardware and
* software.
*/
union scu_remote_node_context *remote_node_context_table;
/**
* This field is a pointer to the completion queue. This memory is
* written to by the hardware and read by the software.
*/
u32 *completion_queue;
/**
* This field is the software copy of the completion queue get pointer. The
* controller object writes this value to the hardware after processing the
* completion entries.
*/
u32 completion_queue_get;
/**
* This field is the minimum of the number of hardware supported port entries
* and the software requested port entries.
*/
u32 logical_port_entries;
/**
* This field is the minimum number of hardware supported completion queue
* entries and the software requested completion queue entries.
*/
u32 completion_queue_entries;
/**
* This field is the minimum number of hardware supported event entries and
* the software requested event entries.
*/
u32 completion_event_entries;
/**
* This field is the minimum number of devices supported by the hardware and
* the number of devices requested by the software.
*/
u32 remote_node_entries;
/**
* This field is the minimum number of IO requests supported by the hardware
* and the number of IO requests requested by the software.
*/
u32 task_context_entries;
/**
* This object contains all of the unsolicited frame specific
* data utilized by the core controller.
*/
struct scic_sds_unsolicited_frame_control uf_control;
/* Phy Startup Data */
/**
* This field is the driver timer handle for controller phy request startup.
* On controller start the controller will start each PHY individually in
* order of phy index.
*/
void *phy_startup_timer;
/**
* This field is set when the phy_startup_timer is running and is cleared when
* the phy_startup_timer is stopped.
*/
bool phy_startup_timer_pending;
/**
* This field is the index of the next phy start. It is initialized to 0 and
* increments for each phy index that is started.
*/
u32 next_phy_to_start;
/**
* This field controlls the invalid link up notifications to the SCI_USER. 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 object reports link up
* and is made part of a port then this bit for the PHY index is cleared.
*/
u8 invalid_phy_mask;
/*
* This field saves the current interrupt coalescing number of the controller.
*/
u16 interrupt_coalesce_number;
/*
* This field saves the current interrupt coalescing timeout value in microseconds.
*/
u32 interrupt_coalesce_timeout;
/**
* This field is a pointer to the memory mapped register space for the
* struct smu_registers.
*/
struct smu_registers __iomem *smu_registers;
/**
* This field is a pointer to the memory mapped register space for the
* struct scu_registers.
*/
struct scu_registers __iomem *scu_registers;
};
/**
* enum scic_sds_controller_states - This enumeration depicts all the states
* for the common controller state machine.
*/
enum scic_sds_controller_states {
/**
* Simply the initial state for the base controller state machine.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_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.
*/
SCI_BASE_CONTROLLER_STATE_FAILED,
SCI_BASE_CONTROLLER_MAX_STATES
};
/**
* INCREMENT_QUEUE_GET() -
*
* This macro will increment the specified index to and if the index wraps to 0
* it will toggel the cycle bit.
*/
#define INCREMENT_QUEUE_GET(index, cycle, entry_count, bit_toggle) \
{ \
if ((index) + 1 == entry_count) { \
(index) = 0; \
(cycle) = (cycle) ^ (bit_toggle); \
} else { \
index = index + 1; \
} \
}
/**
* scic_sds_controller_get_port_configuration_agent() -
*
* This is a helper macro to get the port configuration agent from the
* controller object.
*/
#define scic_sds_controller_get_port_configuration_agent(controller) \
(&(controller)->port_agent)
/**
* scic_sds_controller_get_protocol_engine_group() -
*
* This macro returns the protocol engine group for this controller object.
* Presently we only support protocol engine group 0 so just return that
*/
#define scic_sds_controller_get_protocol_engine_group(controller) 0
/**
* scic_sds_io_tag_construct() -
*
* This macro constructs an IO tag from the sequence and index values.
*/
#define scic_sds_io_tag_construct(sequence, task_index) \
((sequence) << 12 | (task_index))
/**
* scic_sds_io_tag_get_sequence() -
*
* This macro returns the IO sequence from the IO tag value.
*/
#define scic_sds_io_tag_get_sequence(io_tag) \
(((io_tag) & 0xF000) >> 12)
/**
* scic_sds_io_tag_get_index() -
*
* This macro returns the TCi from the io tag value
*/
#define scic_sds_io_tag_get_index(io_tag) \
((io_tag) & 0x0FFF)
/**
* scic_sds_io_sequence_increment() -
*
* This is a helper macro to increment the io sequence count. We may find in
* the future that it will be faster to store the sequence count in such a way
* as we dont perform the shift operation to build io tag values so therefore
* need a way to incrment them correctly
*/
#define scic_sds_io_sequence_increment(value) \
((value) = (((value) + 1) & 0x000F))
#define scic_sds_remote_device_node_count(device) \
(\
(\
(device)->target_protocols.u.bits.attached_stp_target \
&& ((device)->is_direct_attached != true) \
) \
? SCU_STP_REMOTE_NODE_COUNT : SCU_SSP_REMOTE_NODE_COUNT \
)
/**
* scic_sds_controller_set_invalid_phy() -
*
* This macro will set the bit in the invalid phy mask for this controller
* object. This is used to control messages reported for invalid link up
* notifications.
*/
#define scic_sds_controller_set_invalid_phy(controller, phy) \
((controller)->invalid_phy_mask |= (1 << (phy)->phy_index))
/**
* scic_sds_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 scic_sds_controller_clear_invalid_phy(controller, phy) \
((controller)->invalid_phy_mask &= ~(1 << (phy)->phy_index))
void scic_sds_controller_post_request(
struct scic_sds_controller *this_controller,
u32 request);
void scic_sds_controller_release_frame(
struct scic_sds_controller *this_controller,
u32 frame_index);
void scic_sds_controller_copy_sata_response(
void *response_buffer,
void *frame_header,
void *frame_buffer);
enum sci_status scic_sds_controller_allocate_remote_node_context(
struct scic_sds_controller *this_controller,
struct scic_sds_remote_device *sci_dev,
u16 *node_id);
void scic_sds_controller_free_remote_node_context(
struct scic_sds_controller *this_controller,
struct scic_sds_remote_device *sci_dev,
u16 node_id);
union scu_remote_node_context *scic_sds_controller_get_remote_node_context_buffer(
struct scic_sds_controller *this_controller,
u16 node_id);
struct scic_sds_request *scic_sds_controller_get_io_request_from_tag(
struct scic_sds_controller *this_controller,
u16 io_tag);
struct scu_task_context *scic_sds_controller_get_task_context_buffer(
struct scic_sds_controller *this_controller,
u16 io_tag);
void scic_sds_controller_power_control_queue_insert(
struct scic_sds_controller *this_controller,
struct scic_sds_phy *sci_phy);
void scic_sds_controller_power_control_queue_remove(
struct scic_sds_controller *this_controller,
struct scic_sds_phy *sci_phy);
void scic_sds_controller_link_up(
struct scic_sds_controller *this_controller,
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_controller_link_down(
struct scic_sds_controller *this_controller,
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy);
void scic_sds_controller_remote_device_stopped(
struct scic_sds_controller *this_controller,
struct scic_sds_remote_device *sci_dev);
void scic_sds_controller_copy_task_context(
struct scic_sds_controller *this_controller,
struct scic_sds_request *this_request);
void scic_sds_controller_register_setup(
struct scic_sds_controller *this_controller);
enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req);
#endif /* _SCIC_SDS_CONTROLLER_H_ */
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