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kunit / linux / c72086e3c2897eaca5b99c005dd9844fdc784981 / . / drivers / scsi / isci / stp_request.c
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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 <scsi/sas.h>
#include "sas.h"
#include "state_machine.h"
#include "remote_device.h"
#include "stp_request.h"
#include "unsolicited_frame_control.h"
#include "scu_completion_codes.h"
#include "scu_event_codes.h"
#include "scu_task_context.h"
#include "request.h"
/**
* 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 scic_sds_request *sci_req,
struct scu_task_context *task_context)
{
dma_addr_t dma_addr;
struct scic_sds_controller *controller;
struct scic_sds_remote_device *target_device;
struct scic_sds_port *target_port;
controller = scic_sds_request_get_controller(sci_req);
target_device = scic_sds_request_get_device(sci_req);
target_port = scic_sds_request_get_port(sci_req);
/* 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 = target_device->connection_rate;
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_STP;
task_context->valid = SCU_TASK_CONTEXT_VALID;
task_context->context_type = SCU_TASK_CONTEXT_TYPE;
task_context->remote_node_index =
scic_sds_remote_device_get_index(sci_req->target_device);
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 *)&sci_req->stp.cmd;
if (sci_req->was_tag_assigned_by_user) {
/*
* Build the task context now since we have already read
* the data
*/
sci_req->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(sci_req->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.
*/
sci_req->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. We must offset the command buffer by 4 bytes because the
* first 4 bytes are transfered in the body of the TC.
*/
dma_addr = scic_io_request_get_dma_addr(sci_req,
((char *) &sci_req->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;
}
/**
*
* @sci_req:
*
* This method will perform any general sata request construction. What part of
* SATA IO request construction is general? none
*/
static void scic_sds_stp_non_ncq_request_construct(
struct scic_sds_request *sci_req)
{
sci_req->has_started_substate_machine = true;
}
/**
*
* @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 scic_sds_stp_optimized_request_construct(struct scic_sds_request *sci_req,
u8 optimized_task_type,
u32 len,
enum dma_data_direction dir)
{
struct scu_task_context *task_context = sci_req->task_context_buffer;
/* Build the STP task context structure */
scu_sata_reqeust_construct_task_context(sci_req, task_context);
/* Copy over the SGL elements */
scic_sds_request_build_sgl(sci_req);
/* 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;
}
}
/**
*
* @sci_req: This parameter specifies the request to be constructed.
*
* This method will construct the STP UDMA request and its associated TC data.
* This method returns an indication as to whether the construction was
* successful. SCI_SUCCESS Currently this method always returns this value.
*/
enum sci_status scic_sds_stp_ncq_request_construct(struct scic_sds_request *sci_req,
u32 len,
enum dma_data_direction dir)
{
scic_sds_stp_optimized_request_construct(sci_req,
SCU_TASK_TYPE_FPDMAQ_READ,
len, dir);
return SCI_SUCCESS;
}
/**
* scu_stp_raw_request_construct_task_context -
* @sci_req: This parameter specifies the STP request object for which to
* construct a RAW command frame task context.
* @task_context: This parameter specifies the SCU specific task context buffer
* to construct.
*
* This method performs the operations common to all SATA/STP requests
* utilizing the raw frame method. none
*/
static void scu_stp_raw_request_construct_task_context(
struct scic_sds_stp_request *stp_req,
struct scu_task_context *task_context)
{
struct scic_sds_request *sci_req = to_sci_req(stp_req);
scu_sata_reqeust_construct_task_context(sci_req, 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);
}
void scic_stp_io_request_set_ncq_tag(
struct scic_sds_request *req,
u16 ncq_tag)
{
/**
* @note This could be made to return an error to the user if the user
* attempts to set the NCQ tag in the wrong state.
*/
req->task_context_buffer->type.stp.ncq_tag = ncq_tag;
}
/**
*
* @sci_req:
*
* Get the next SGL element from the request. - Check on which SGL element pair
* we are working - if working on SLG pair element A - advance to element B -
* else - check to see if there are more SGL element pairs for this IO request
* - if there are more SGL element pairs - advance to the next pair and return
* element A struct scu_sgl_element*
*/
static struct scu_sgl_element *scic_sds_stp_request_pio_get_next_sgl(struct scic_sds_stp_request *stp_req)
{
struct scu_sgl_element *current_sgl;
struct scic_sds_request *sci_req = to_sci_req(stp_req);
struct scic_sds_request_pio_sgl *pio_sgl = &stp_req->type.pio.request_current;
if (pio_sgl->sgl_set == SCU_SGL_ELEMENT_PAIR_A) {
if (pio_sgl->sgl_pair->B.address_lower == 0 &&
pio_sgl->sgl_pair->B.address_upper == 0) {
current_sgl = NULL;
} else {
pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_B;
current_sgl = &pio_sgl->sgl_pair->B;
}
} else {
if (pio_sgl->sgl_pair->next_pair_lower == 0 &&
pio_sgl->sgl_pair->next_pair_upper == 0) {
current_sgl = NULL;
} else {
u64 phys_addr;
phys_addr = pio_sgl->sgl_pair->next_pair_upper;
phys_addr <<= 32;
phys_addr |= pio_sgl->sgl_pair->next_pair_lower;
pio_sgl->sgl_pair = scic_request_get_virt_addr(sci_req, phys_addr);
pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_A;
current_sgl = &pio_sgl->sgl_pair->A;
}
}
return current_sgl;
}
/**
*
* @sci_req:
* @completion_code:
*
* This method processes a TC completion. The expected TC completion is for
* the transmission of the H2D register FIS containing the SATA/STP non-data
* request. This method always successfully processes the TC completion.
* SCI_SUCCESS This value is always returned.
*/
static enum sci_status scic_sds_stp_request_non_data_await_h2d_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->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE
);
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;
}
/**
*
* @request: This parameter specifies the request for which a frame has been
* received.
* @frame_index: This parameter specifies the index of the frame that has been
* received.
*
* This method processes frames received from the target while waiting for a
* device to host register FIS. If a non-register FIS is received during this
* time, it is treated as a protocol violation from an IO perspective. Indicate
* if the received frame was processed successfully.
*/
static enum sci_status scic_sds_stp_request_non_data_await_d2h_frame_handler(
struct scic_sds_request *sci_req,
u32 frame_index)
{
enum sci_status status;
struct dev_to_host_fis *frame_header;
u32 *frame_buffer;
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
struct scic_sds_controller *scic = sci_req->owning_controller;
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
frame_index,
(void **)&frame_header);
if (status != SCI_SUCCESS) {
dev_err(scic_to_dev(sci_req->owning_controller),
"%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:
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
frame_index,
(void **)&frame_buffer);
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
frame_header,
frame_buffer);
/* The command has completed with error */
scic_sds_request_set_status(sci_req, SCU_TASK_DONE_CHECK_RESPONSE,
SCI_FAILURE_IO_RESPONSE_VALID);
break;
default:
dev_warn(scic_to_dev(scic),
"%s: IO Request:0x%p Frame Id:%d protocol "
"violation occurred\n", __func__, stp_req,
frame_index);
scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
SCI_FAILURE_PROTOCOL_VIOLATION);
break;
}
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
/* Frame has been decoded return it to the controller */
scic_sds_controller_release_frame(scic, frame_index);
return status;
}
/* --------------------------------------------------------------------------- */
static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_non_data_substate_handler_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_stp_request_non_data_await_h2d_tc_completion_handler,
},
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.frame_handler = scic_sds_stp_request_non_data_await_d2h_frame_handler,
}
};
static void scic_sds_stp_request_started_non_data_await_h2d_completion_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_non_data_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE
);
scic_sds_remote_device_set_working_request(
sci_req->target_device, sci_req
);
}
static void scic_sds_stp_request_started_non_data_await_d2h_enter(void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_non_data_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE
);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_stp_request_started_non_data_substate_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_non_data_await_h2d_completion_enter,
},
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_non_data_await_d2h_enter,
},
};
enum sci_status scic_sds_stp_non_data_request_construct(struct scic_sds_request *sci_req)
{
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
scic_sds_stp_non_ncq_request_construct(sci_req);
/* Build the STP task context structure */
scu_stp_raw_request_construct_task_context(stp_req, sci_req->task_context_buffer);
sci_base_state_machine_construct(&sci_req->started_substate_machine,
sci_req,
scic_sds_stp_request_started_non_data_substate_table,
SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE);
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 scic_sds_stp_request_pio_data_out_trasmit_data_frame(
struct scic_sds_request *sci_req,
u32 length)
{
struct scic_sds_controller *scic = sci_req->owning_controller;
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
struct scu_task_context *task_context;
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
*/
task_context = scic_sds_controller_get_task_context_buffer(scic,
sci_req->io_tag);
if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A)
current_sgl = &stp_req->type.pio.request_current.sgl_pair->A;
else
current_sgl = &stp_req->type.pio.request_current.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 scic_controller_continue_io(sci_req);
}
static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data(struct scic_sds_request *sci_req)
{
struct scu_sgl_element *current_sgl;
u32 sgl_offset;
u32 remaining_bytes_in_current_sgl = 0;
enum sci_status status = SCI_SUCCESS;
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
sgl_offset = stp_req->type.pio.request_current.sgl_offset;
if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) {
current_sgl = &(stp_req->type.pio.request_current.sgl_pair->A);
remaining_bytes_in_current_sgl = stp_req->type.pio.request_current.sgl_pair->A.length - sgl_offset;
} else {
current_sgl = &(stp_req->type.pio.request_current.sgl_pair->B);
remaining_bytes_in_current_sgl = stp_req->type.pio.request_current.sgl_pair->B.length - sgl_offset;
}
if (stp_req->type.pio.pio_transfer_bytes > 0) {
if (stp_req->type.pio.pio_transfer_bytes >= remaining_bytes_in_current_sgl) {
/* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = remaining_bytes_in_current_sgl */
status = scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, remaining_bytes_in_current_sgl);
if (status == SCI_SUCCESS) {
stp_req->type.pio.pio_transfer_bytes -= remaining_bytes_in_current_sgl;
/* update the current sgl, sgl_offset and save for future */
current_sgl = scic_sds_stp_request_pio_get_next_sgl(stp_req);
sgl_offset = 0;
}
} else if (stp_req->type.pio.pio_transfer_bytes < remaining_bytes_in_current_sgl) {
/* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = type.pio.pio_transfer_bytes */
scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, stp_req->type.pio.pio_transfer_bytes);
if (status == SCI_SUCCESS) {
/* Sgl offset will be adjusted and saved for future */
sgl_offset += stp_req->type.pio.pio_transfer_bytes;
current_sgl->address_lower += stp_req->type.pio.pio_transfer_bytes;
stp_req->type.pio.pio_transfer_bytes = 0;
}
}
}
if (status == SCI_SUCCESS) {
stp_req->type.pio.request_current.sgl_offset = sgl_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
scic_sds_stp_request_pio_data_in_copy_data_buffer(struct scic_sds_stp_request *stp_req,
u8 *data_buf, u32 len)
{
struct scic_sds_request *sci_req;
struct isci_request *ireq;
u8 *src_addr;
int copy_len;
struct sas_task *task;
struct scatterlist *sg;
void *kaddr;
int total_len = len;
sci_req = to_sci_req(stp_req);
ireq = sci_req_to_ireq(sci_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 scic_sds_stp_request_pio_data_in_copy_data(
struct scic_sds_stp_request *sci_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 (sci_req->type.pio.pio_transfer_bytes < SCU_MAX_FRAME_BUFFER_SIZE) {
status = scic_sds_stp_request_pio_data_in_copy_data_buffer(
sci_req, data_buffer, sci_req->type.pio.pio_transfer_bytes);
if (status == SCI_SUCCESS)
sci_req->type.pio.pio_transfer_bytes = 0;
} else {
/* We are transfering the whole frame so copy */
status = scic_sds_stp_request_pio_data_in_copy_data_buffer(
sci_req, data_buffer, SCU_MAX_FRAME_BUFFER_SIZE);
if (status == SCI_SUCCESS)
sci_req->type.pio.pio_transfer_bytes -= SCU_MAX_FRAME_BUFFER_SIZE;
}
return status;
}
/**
*
* @sci_req:
* @completion_code:
*
* enum sci_status
*/
static enum sci_status scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
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):
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_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
);
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 status;
}
static enum sci_status scic_sds_stp_request_pio_await_frame_frame_handler(struct scic_sds_request *sci_req,
u32 frame_index)
{
struct scic_sds_controller *scic = sci_req->owning_controller;
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
struct isci_request *ireq = sci_req_to_ireq(sci_req);
struct sas_task *task = isci_request_access_task(ireq);
struct dev_to_host_fis *frame_header;
enum sci_status status;
u32 *frame_buffer;
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
frame_index,
(void **)&frame_header);
if (status != SCI_SUCCESS) {
dev_err(scic_to_dev(scic),
"%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 */
scic_sds_unsolicited_frame_control_get_buffer(&scic->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->type.pio.pio_transfer_bytes = frame_buffer[3] & 0xffff;
/* ending_status: 4th byte in the 3rd dword */
stp_req->type.pio.ending_status = (frame_buffer[2] >> 24) & 0xff;
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
frame_header,
frame_buffer);
sci_req->stp.rsp.status = stp_req->type.pio.ending_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_base_state_machine_change_state(&sci_req->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE);
} else if (task->data_dir == DMA_TO_DEVICE) {
/* Transmit data */
status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req);
if (status != SCI_SUCCESS)
break;
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE);
}
break;
case FIS_SETDEVBITS:
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
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(scic_to_dev(scic),
"%s: SCIC PIO Request 0x%p received "
"D2H Register FIS with BSY status "
"0x%x\n", __func__, stp_req,
frame_header->status);
break;
}
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
frame_index,
(void **)&frame_buffer);
scic_sds_controller_copy_sata_response(&sci_req->stp.req,
frame_header,
frame_buffer);
scic_sds_request_set_status(sci_req,
SCU_TASK_DONE_CHECK_RESPONSE,
SCI_FAILURE_IO_RESPONSE_VALID);
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
break;
default:
/* FIXME: what do we do here? */
break;
}
/* Frame is decoded return it to the controller */
scic_sds_controller_release_frame(scic, frame_index);
return status;
}
static enum sci_status scic_sds_stp_request_pio_data_in_await_data_frame_handler(struct scic_sds_request *sci_req,
u32 frame_index)
{
enum sci_status status;
struct dev_to_host_fis *frame_header;
struct sata_fis_data *frame_buffer;
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
struct scic_sds_controller *scic = sci_req->owning_controller;
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
frame_index,
(void **)&frame_header);
if (status != SCI_SUCCESS) {
dev_err(scic_to_dev(scic),
"%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) {
if (stp_req->type.pio.request_current.sgl_pair == NULL) {
sci_req->saved_rx_frame_index = frame_index;
stp_req->type.pio.pio_transfer_bytes = 0;
} else {
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
frame_index,
(void **)&frame_buffer);
status = scic_sds_stp_request_pio_data_in_copy_data(stp_req,
(u8 *)frame_buffer);
/* Frame is decoded return it to the controller */
scic_sds_controller_release_frame(scic, frame_index);
}
/* Check for the end of the transfer, are there more
* bytes remaining for this data transfer
*/
if (status != SCI_SUCCESS ||
stp_req->type.pio.pio_transfer_bytes != 0)
return status;
if ((stp_req->type.pio.ending_status & ATA_BUSY) == 0) {
scic_sds_request_set_status(sci_req,
SCU_TASK_DONE_CHECK_RESPONSE,
SCI_FAILURE_IO_RESPONSE_VALID);
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
} else {
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
}
} else {
dev_err(scic_to_dev(scic),
"%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);
scic_sds_request_set_status(sci_req,
SCU_TASK_DONE_GOOD,
SCI_FAILURE_IO_REQUIRES_SCSI_ABORT);
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
/* Frame is decoded return it to the controller */
scic_sds_controller_release_frame(scic, frame_index);
}
return status;
}
/**
*
* @sci_req:
* @completion_code:
*
* enum sci_status
*/
static enum sci_status scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
u32 completion_code)
{
enum sci_status status = SCI_SUCCESS;
bool all_frames_transferred = false;
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
/* Transmit data */
if (stp_req->type.pio.pio_transfer_bytes != 0) {
status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req);
if (status == SCI_SUCCESS) {
if (stp_req->type.pio.pio_transfer_bytes == 0)
all_frames_transferred = true;
}
} else if (stp_req->type.pio.pio_transfer_bytes == 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 SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_FRAME_SUBSTATE
* and wait for PIO_SETUP fis / or D2H REg fis. */
sci_base_state_machine_change_state(
&sci_req->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
);
}
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 status;
}
/**
*
* @request: This is the request which is receiving the event.
* @event_code: This is the event code that the request on which the request is
* expected to take action.
*
* This method will handle any link layer events while waiting for the data
* frame. enum sci_status SCI_SUCCESS SCI_FAILURE
*/
static enum sci_status scic_sds_stp_request_pio_data_in_await_data_event_handler(
struct scic_sds_request *request,
u32 event_code)
{
enum sci_status status;
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_base_state_machine_change_state(
&request->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
);
status = SCI_SUCCESS;
break;
default:
dev_err(scic_to_dev(request->owning_controller),
"%s: SCIC PIO Request 0x%p received unexpected "
"event 0x%08x\n",
__func__, request, event_code);
/* / @todo Should we fail the PIO request when we get an unexpected event? */
status = SCI_FAILURE;
break;
}
return status;
}
/* --------------------------------------------------------------------------- */
static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_pio_substate_handler_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler,
},
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.frame_handler = scic_sds_stp_request_pio_await_frame_frame_handler
},
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.event_handler = scic_sds_stp_request_pio_data_in_await_data_event_handler,
.frame_handler = scic_sds_stp_request_pio_data_in_await_data_frame_handler
},
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler,
}
};
static void scic_sds_stp_request_started_pio_await_h2d_completion_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_pio_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE
);
scic_sds_remote_device_set_working_request(
sci_req->target_device, sci_req);
}
static void scic_sds_stp_request_started_pio_await_frame_enter(void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_pio_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
);
}
static void scic_sds_stp_request_started_pio_data_in_await_data_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_pio_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE
);
}
static void scic_sds_stp_request_started_pio_data_out_transmit_data_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_pio_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE
);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_stp_request_started_pio_substate_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_pio_await_h2d_completion_enter,
},
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_pio_await_frame_enter,
},
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_pio_data_in_await_data_enter,
},
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_pio_data_out_transmit_data_enter,
}
};
enum sci_status
scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req,
bool copy_rx_frame)
{
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
struct scic_sds_stp_pio_request *pio = &stp_req->type.pio;
scic_sds_stp_non_ncq_request_construct(sci_req);
scu_stp_raw_request_construct_task_context(stp_req,
sci_req->task_context_buffer);
pio->current_transfer_bytes = 0;
pio->ending_error = 0;
pio->ending_status = 0;
pio->request_current.sgl_offset = 0;
pio->request_current.sgl_set = SCU_SGL_ELEMENT_PAIR_A;
if (copy_rx_frame) {
scic_sds_request_build_sgl(sci_req);
/* Since the IO request copy of the TC contains the same data as
* the actual TC this pointer is vaild for either.
*/
pio->request_current.sgl_pair = &sci_req->task_context_buffer->sgl_pair_ab;
} else {
/* The user does not want the data copied to the SGL buffer location */
pio->request_current.sgl_pair = NULL;
}
sci_base_state_machine_construct(&sci_req->started_substate_machine,
sci_req,
scic_sds_stp_request_started_pio_substate_table,
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE);
return SCI_SUCCESS;
}
static void scic_sds_stp_request_udma_complete_request(
struct scic_sds_request *request,
u32 scu_status,
enum sci_status sci_status)
{
scic_sds_request_set_status(request, scu_status, sci_status);
sci_base_state_machine_change_state(&request->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
}
static enum sci_status scic_sds_stp_request_udma_general_frame_handler(struct scic_sds_request *sci_req,
u32 frame_index)
{
struct scic_sds_controller *scic = sci_req->owning_controller;
struct dev_to_host_fis *frame_header;
enum sci_status status;
u32 *frame_buffer;
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
frame_index,
(void **)&frame_header);
if ((status == SCI_SUCCESS) &&
(frame_header->fis_type == FIS_REGD2H)) {
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
frame_index,
(void **)&frame_buffer);
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
frame_header,
frame_buffer);
}
scic_sds_controller_release_frame(scic, frame_index);
return status;
}
static enum sci_status scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler(
struct scic_sds_request *sci_req,
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):
scic_sds_stp_request_udma_complete_request(sci_req,
SCU_TASK_DONE_GOOD,
SCI_SUCCESS);
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 (sci_req->stp.rsp.fis_type == FIS_REGD2H) {
scic_sds_remote_device_suspend(sci_req->target_device,
SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code)));
scic_sds_stp_request_udma_complete_request(sci_req,
SCU_TASK_DONE_CHECK_RESPONSE,
SCI_FAILURE_IO_RESPONSE_VALID);
} 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_base_state_machine_change_state(&sci_req->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE);
}
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):
scic_sds_remote_device_suspend(sci_req->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. */
scic_sds_stp_request_udma_complete_request(sci_req,
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
break;
}
return status;
}
static enum sci_status scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler(
struct scic_sds_request *sci_req,
u32 frame_index)
{
enum sci_status status;
/* Use the general frame handler to copy the resposne data */
status = scic_sds_stp_request_udma_general_frame_handler(sci_req, frame_index);
if (status != SCI_SUCCESS)
return status;
scic_sds_stp_request_udma_complete_request(sci_req,
SCU_TASK_DONE_CHECK_RESPONSE,
SCI_FAILURE_IO_RESPONSE_VALID);
return status;
}
/* --------------------------------------------------------------------------- */
static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_udma_substate_handler_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler,
.frame_handler = scic_sds_stp_request_udma_general_frame_handler,
},
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.frame_handler = scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler,
},
};
static void scic_sds_stp_request_started_udma_await_tc_completion_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_udma_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE
);
}
/**
*
*
* This state is entered when there is an TC completion failure. The hardware
* received an unexpected condition while processing the IO request and now
* will UF the D2H register FIS to complete the IO.
*/
static void scic_sds_stp_request_started_udma_await_d2h_reg_fis_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_udma_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE
);
}
/* --------------------------------------------------------------------------- */
static const struct sci_base_state scic_sds_stp_request_started_udma_substate_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_udma_await_tc_completion_enter,
},
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_udma_await_d2h_reg_fis_enter,
},
};
enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req,
u32 len,
enum dma_data_direction dir)
{
scic_sds_stp_non_ncq_request_construct(sci_req);
scic_sds_stp_optimized_request_construct(sci_req, SCU_TASK_TYPE_DMA_IN,
len, dir);
sci_base_state_machine_construct(
&sci_req->started_substate_machine,
sci_req,
scic_sds_stp_request_started_udma_substate_table,
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE
);
return SCI_SUCCESS;
}
/**
*
* @sci_req:
* @completion_code:
*
* This method processes a TC completion. The expected TC completion is for
* the transmission of the H2D register FIS containing the SATA/STP non-data
* request. This method always successfully processes the TC completion.
* SCI_SUCCESS This value is always returned.
*/
static enum sci_status scic_sds_stp_request_soft_reset_await_h2d_asserted_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->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE
);
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;
}
/**
*
* @sci_req:
* @completion_code:
*
* This method processes a TC completion. The expected TC completion is for
* the transmission of the H2D register FIS containing the SATA/STP non-data
* request. This method always successfully processes the TC completion.
* SCI_SUCCESS This value is always returned.
*/
static enum sci_status scic_sds_stp_request_soft_reset_await_h2d_diagnostic_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->started_substate_machine,
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE
);
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;
}
/**
*
* @request: This parameter specifies the request for which a frame has been
* received.
* @frame_index: This parameter specifies the index of the frame that has been
* received.
*
* This method processes frames received from the target while waiting for a
* device to host register FIS. If a non-register FIS is received during this
* time, it is treated as a protocol violation from an IO perspective. Indicate
* if the received frame was processed successfully.
*/
static enum sci_status scic_sds_stp_request_soft_reset_await_d2h_frame_handler(
struct scic_sds_request *sci_req,
u32 frame_index)
{
enum sci_status status;
struct dev_to_host_fis *frame_header;
u32 *frame_buffer;
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
struct scic_sds_controller *scic = sci_req->owning_controller;
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
frame_index,
(void **)&frame_header);
if (status != SCI_SUCCESS) {
dev_err(scic_to_dev(scic),
"%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:
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
frame_index,
(void **)&frame_buffer);
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
frame_header,
frame_buffer);
/* The command has completed with error */
scic_sds_request_set_status(sci_req,
SCU_TASK_DONE_CHECK_RESPONSE,
SCI_FAILURE_IO_RESPONSE_VALID);
break;
default:
dev_warn(scic_to_dev(scic),
"%s: IO Request:0x%p Frame Id:%d protocol "
"violation occurred\n", __func__, stp_req,
frame_index);
scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
SCI_FAILURE_PROTOCOL_VIOLATION);
break;
}
sci_base_state_machine_change_state(&sci_req->state_machine,
SCI_BASE_REQUEST_STATE_COMPLETED);
/* Frame has been decoded return it to the controller */
scic_sds_controller_release_frame(scic, frame_index);
return status;
}
/* --------------------------------------------------------------------------- */
static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_soft_reset_substate_handler_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_asserted_tc_completion_handler,
},
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_completion_handler,
},
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = {
.abort_handler = scic_sds_request_started_state_abort_handler,
.frame_handler = scic_sds_stp_request_soft_reset_await_d2h_frame_handler,
},
};
static void scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_soft_reset_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE
);
scic_sds_remote_device_set_working_request(
sci_req->target_device, sci_req
);
}
static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
struct scu_task_context *task_context;
struct host_to_dev_fis *h2d_fis;
enum sci_status status;
/* Clear the SRST bit */
h2d_fis = &sci_req->stp.cmd;
h2d_fis->control = 0;
/* Clear the TC control bit */
task_context = scic_sds_controller_get_task_context_buffer(
sci_req->owning_controller, sci_req->io_tag);
task_context->control_frame = 0;
status = scic_controller_continue_io(sci_req);
if (status == SCI_SUCCESS) {
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_soft_reset_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE
);
}
}
static void scic_sds_stp_request_started_soft_reset_await_d2h_response_enter(
void *object)
{
struct scic_sds_request *sci_req = object;
SET_STATE_HANDLER(
sci_req,
scic_sds_stp_request_started_soft_reset_substate_handler_table,
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE
);
}
static const struct sci_base_state scic_sds_stp_request_started_soft_reset_substate_table[] = {
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter,
},
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter,
},
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = {
.enter_state = scic_sds_stp_request_started_soft_reset_await_d2h_response_enter,
},
};
enum sci_status scic_sds_stp_soft_reset_request_construct(struct scic_sds_request *sci_req)
{
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
scic_sds_stp_non_ncq_request_construct(sci_req);
/* Build the STP task context structure */
scu_stp_raw_request_construct_task_context(stp_req, sci_req->task_context_buffer);
sci_base_state_machine_construct(&sci_req->started_substate_machine,
sci_req,
scic_sds_stp_request_started_soft_reset_substate_table,
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE);
return SCI_SUCCESS;
}