diff options
Diffstat (limited to 'drivers/scsi/isci/core/scic_sds_stp_request.c')
| -rw-r--r-- | drivers/scsi/isci/core/scic_sds_stp_request.c | 2004 |
1 files changed, 2004 insertions, 0 deletions
diff --git a/drivers/scsi/isci/core/scic_sds_stp_request.c b/drivers/scsi/isci/core/scic_sds_stp_request.c new file mode 100644 index 000000000000..c14f6f10edb1 --- /dev/null +++ b/drivers/scsi/isci/core/scic_sds_stp_request.c @@ -0,0 +1,2004 @@ +/* + * 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_ata.h" +#include "intel_sata.h" +#include "intel_sat.h" +#include "sci_base_state.h" +#include "sci_base_state_machine.h" +#include "scic_io_request.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_stp_pio_request.h" +#include "scic_sds_stp_request.h" +#include "scic_sds_unsolicited_frame_control.h" +#include "scic_user_callback.h" +#include "sci_environment.h" +#include "sci_types.h" +#include "sci_util.h" +#include "scu_completion_codes.h" +#include "scu_event_codes.h" +#include "scu_task_context.h" + +/** + * scic_sds_stp_request_get_h2d_reg_buffer() - + * + * This macro returns the address of the stp h2d reg fis buffer in the io + * request memory + */ +#define scic_sds_stp_request_get_h2d_reg_buffer(memory) \ + ((struct sata_fis_reg_h2d *)(\ + ((char *)(memory)) + sizeof(struct scic_sds_stp_request) \ + )) + +/** + * scic_sds_stp_request_get_response_buffer() - + * + * This macro returns the address of the ssp response iu buffer in the io + * request memory + */ +#define scic_sds_stp_request_get_response_buffer(memory) \ + ((struct sata_fis_reg_d2h *)(\ + ((char *)(scic_sds_stp_request_get_h2d_reg_buffer(memory))) \ + + sizeof(struct sata_fis_reg_h2d) \ + )) + +/** + * scic_sds_stp_request_get_task_context_buffer() - + * + * This macro returns the address of the task context buffer in the io request + * memory + */ +#define scic_sds_stp_request_get_task_context_buffer(memory) \ + ((struct scu_task_context *)(\ + ((char *)(scic_sds_stp_request_get_response_buffer(memory))) \ + + sizeof(struct sci_ssp_response_iu) \ + )) + +/** + * scic_sds_stp_request_get_sgl_element_buffer() - + * + * This macro returns the address of the sgl elment pairs in the io request + * memory buffer + */ +#define scic_sds_stp_request_get_sgl_element_buffer(memory) \ + ((struct scu_sgl_element_pair *)(\ + ((char *)(scic_sds_stp_request_get_task_context_buffer(memory))) \ + + sizeof(struct scu_task_context) \ + )) + +/** + * + * + * This method return the memory space required for STP PIO requests. u32 + */ +u32 scic_sds_stp_request_get_object_size(void) +{ + return sizeof(struct scic_sds_stp_request) + + sizeof(struct sata_fis_reg_h2d) + + sizeof(struct sata_fis_reg_d2h) + + sizeof(struct scu_task_context) + + sizeof(struct scu_sgl_element_pair) * SCU_MAX_SGL_ELEMENT_PAIRS; +} + +/** + * + * + * + */ +void scic_sds_stp_request_assign_buffers( + struct scic_sds_request *request) +{ + struct scic_sds_stp_request *this_request = (struct scic_sds_stp_request *)request; + + this_request->parent.command_buffer = + scic_sds_stp_request_get_h2d_reg_buffer(this_request); + this_request->parent.response_buffer = + scic_sds_stp_request_get_response_buffer(this_request); + this_request->parent.sgl_element_pair_buffer = + scic_sds_stp_request_get_sgl_element_buffer(this_request); + this_request->parent.sgl_element_pair_buffer = + scic_sds_request_align_sgl_element_buffer(this_request->parent.sgl_element_pair_buffer); + + if (this_request->parent.was_tag_assigned_by_user == false) { + this_request->parent.task_context_buffer = + scic_sds_stp_request_get_task_context_buffer(this_request); + this_request->parent.task_context_buffer = + scic_sds_request_align_task_context_buffer(this_request->parent.task_context_buffer); + } +} + +/** + * This method is will fill in the SCU Task Context for any type of SATA + * request. This is called from the various SATA constructors. + * @this_request: 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 *this_request, + struct scu_task_context *task_context) +{ + dma_addr_t physical_address; + struct scic_sds_controller *owning_controller; + struct scic_sds_remote_device *target_device; + struct scic_sds_port *target_port; + + owning_controller = scic_sds_request_get_controller(this_request); + target_device = scic_sds_request_get_device(this_request); + target_port = scic_sds_request_get_port(this_request); + + /* 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 = + scic_remote_device_get_connection_rate(target_device); + task_context->protocol_engine_index = + scic_sds_controller_get_protocol_engine_group(owning_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(this_request->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 sata_fis_reg_h2d) - sizeof(u32)) / sizeof(u32); + + /* Set the first word of the H2D REG FIS */ + task_context->type.words[0] = *(u32 *)this_request->command_buffer; + + if (this_request->was_tag_assigned_by_user) { + /* Build the task context now since we have already read the data */ + this_request->post_context = ( + SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC + | ( + scic_sds_controller_get_protocol_engine_group(owning_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(this_request->io_tag) + ); + } else { + /* Build the task context now since we have already read the data */ + this_request->post_context = ( + SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC + | ( + scic_sds_controller_get_protocol_engine_group(owning_controller) + << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT + ) + | ( + scic_sds_port_get_index(target_port) + << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT + ) + /* This is not assigned because we have to wait until we get a TCi */ + ); + } + + /* + * 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 */ + scic_cb_io_request_get_physical_address( + scic_sds_request_get_controller(this_request), + this_request, + ((char *)this_request->command_buffer) + sizeof(u32), + &physical_address + ); + + task_context->command_iu_upper = + upper_32_bits(physical_address); + task_context->command_iu_lower = + lower_32_bits(physical_address); + + /* SATA Requests do not have a response buffer */ + task_context->response_iu_upper = 0; + task_context->response_iu_lower = 0; +} + +/** + * + * @this_request: + * + * This method will perform any general sata request construction. What part of + * SATA IO request construction is general? none + */ +void scic_sds_stp_non_ncq_request_construct( + struct scic_sds_request *this_request) +{ + this_request->has_started_substate_machine = true; +} + +/** + * + * @this_request: 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 *this_request, + u8 optimized_task_type, + u32 transfer_length, + SCI_IO_REQUEST_DATA_DIRECTION data_direction) +{ + struct scu_task_context *task_context = this_request->task_context_buffer; + + /* Build the STP task context structure */ + scu_sata_reqeust_construct_task_context(this_request, task_context); + + /* Copy over the SGL elements */ + scic_sds_request_build_sgl(this_request); + + /* Copy over the number of bytes to be transfered */ + task_context->transfer_length_bytes = transfer_length; + + if (data_direction == SCI_IO_REQUEST_DATA_OUT) { + /* + * 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; + } +} + +/** + * + * @this_request: 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_udma_request_construct( + struct scic_sds_request *this_request, + u32 transfer_length, + SCI_IO_REQUEST_DATA_DIRECTION data_direction) +{ + scic_sds_stp_non_ncq_request_construct(this_request); + + scic_sds_stp_optimized_request_construct( + this_request, + SCU_TASK_TYPE_DMA_IN, + transfer_length, + data_direction + ); + + sci_base_state_machine_construct( + &this_request->started_substate_machine, + &this_request->parent.parent, + scic_sds_stp_request_started_udma_substate_table, + SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE + ); + + return SCI_SUCCESS; +} + +/** + * + * @this_request: 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 *this_request, + u32 transfer_length, + SCI_IO_REQUEST_DATA_DIRECTION data_direction) +{ + scic_sds_stp_optimized_request_construct( + this_request, + SCU_TASK_TYPE_FPDMAQ_READ, + transfer_length, + data_direction + ); + return SCI_SUCCESS; +} + +/** + * + * @this_request: 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 + */ +void scu_stp_raw_request_construct_task_context( + struct scic_sds_stp_request *this_request, + struct scu_task_context *task_context) +{ + scu_sata_reqeust_construct_task_context(&this_request->parent, 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 = SATA_FIS_TYPE_REGH2D; + task_context->transfer_length_bytes = sizeof(struct sata_fis_reg_h2d) - sizeof(u32); +} + +/** + * + * @this_request: This parameter specifies the core request object to + * construction into an STP/SATA non-data request. + * + * This method will construct the STP Non-data request and its associated TC + * data. A non-data request essentially behaves like a 0 length read request + * in the SCU. This method currently always returns SCI_SUCCESS + */ +enum sci_status scic_sds_stp_non_data_request_construct( + struct scic_sds_request *this_request) +{ + scic_sds_stp_non_ncq_request_construct(this_request); + + /* Build the STP task context structure */ + scu_stp_raw_request_construct_task_context( + (struct scic_sds_stp_request *)this_request, + this_request->task_context_buffer + ); + + sci_base_state_machine_construct( + &this_request->started_substate_machine, + &this_request->parent.parent, + scic_sds_stp_request_started_non_data_substate_table, + SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE + ); + + return SCI_SUCCESS; +} + + +enum sci_status scic_sds_stp_soft_reset_request_construct( + struct scic_sds_request *this_request) +{ + scic_sds_stp_non_ncq_request_construct(this_request); + + /* Build the STP task context structure */ + scu_stp_raw_request_construct_task_context( + (struct scic_sds_stp_request *)this_request, + this_request->task_context_buffer + ); + + sci_base_state_machine_construct( + &this_request->started_substate_machine, + &this_request->parent.parent, + scic_sds_stp_request_started_soft_reset_substate_table, + SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE + ); + + return SCI_SUCCESS; +} + + +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; +} + + +void *scic_stp_io_request_get_h2d_reg_address( + struct scic_sds_request *req) +{ + return req->command_buffer; +} + + +void *scic_stp_io_request_get_d2h_reg_address( + struct scic_sds_request *req) +{ + return &((struct scic_sds_stp_request *)req)->d2h_reg_fis; +} + +/** + * + * @this_request: + * + * 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* + */ +struct scu_sgl_element *scic_sds_stp_request_pio_get_next_sgl( + struct scic_sds_stp_request *this_request + ) { + struct scu_sgl_element *current_sgl; + + if (this_request->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) { + if ( + (this_request->type.pio.request_current.sgl_pair->B.address_lower == 0) + && (this_request->type.pio.request_current.sgl_pair->B.address_upper == 0) + ) { + current_sgl = NULL; + } else { + this_request->type.pio.request_current.sgl_set = SCU_SGL_ELEMENT_PAIR_B; + current_sgl = &(this_request->type.pio.request_current.sgl_pair->B); + } + } else { + if ( + (this_request->type.pio.request_current.sgl_pair->next_pair_lower == 0) + && (this_request->type.pio.request_current.sgl_pair->next_pair_upper == 0) + ) { + current_sgl = NULL; + } else { + dma_addr_t physical_address; + + sci_cb_make_physical_address( + physical_address, + this_request->type.pio.request_current.sgl_pair->next_pair_upper, + this_request->type.pio.request_current.sgl_pair->next_pair_lower + ); + + this_request->type.pio.request_current.sgl_pair = + (struct scu_sgl_element_pair *)scic_cb_get_virtual_address( + this_request->parent.owning_controller, + physical_address + ); + + this_request->type.pio.request_current.sgl_set = SCU_SGL_ELEMENT_PAIR_A; + + current_sgl = &(this_request->type.pio.request_current.sgl_pair->A); + } + } + + return current_sgl; +} + +/** + * + * @scic_io_request: The core request object which is cast to a SATA PIO + * request object. + * + * This method will construct the SATA PIO request. 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_pio_request_construct( + struct scic_sds_request *scic_io_request, + u8 sat_protocol, + bool copy_rx_frame) +{ + struct scic_sds_stp_request *this_request; + + this_request = (struct scic_sds_stp_request *)scic_io_request; + + scic_sds_stp_non_ncq_request_construct(&this_request->parent); + + scu_stp_raw_request_construct_task_context( + this_request, this_request->parent.task_context_buffer + ); + + this_request->type.pio.current_transfer_bytes = 0; + this_request->type.pio.ending_error = 0; + this_request->type.pio.ending_status = 0; + + this_request->type.pio.request_current.sgl_offset = 0; + this_request->type.pio.request_current.sgl_set = SCU_SGL_ELEMENT_PAIR_A; + this_request->type.pio.sat_protocol = sat_protocol; + + if (copy_rx_frame) { + scic_sds_request_build_sgl(&this_request->parent); + /* + * Since the IO request copy of the TC contains the same data as + * the actual TC this pointer is vaild for either. */ + this_request->type.pio.request_current.sgl_pair = + &this_request->parent.task_context_buffer->sgl_pair_ab; + } else { + /* The user does not want the data copied to the SGL buffer location */ + this_request->type.pio.request_current.sgl_pair = NULL; + } + + sci_base_state_machine_construct( + &this_request->parent.started_substate_machine, + &this_request->parent.parent.parent, + scic_sds_stp_request_started_pio_substate_table, + SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE + ); + + return SCI_SUCCESS; +} + +/** + * + * @this_request: + * @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 *this_request, + 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( + this_request, SCU_TASK_DONE_GOOD, SCI_SUCCESS + ); + + sci_base_state_machine_change_state( + &this_request->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( + this_request, + SCU_NORMALIZE_COMPLETION_STATUS(completion_code), + SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR + ); + + sci_base_state_machine_change_state( + &this_request->parent.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 *request, + u32 frame_index) +{ + enum sci_status status; + struct sata_fis_header *frame_header; + u32 *frame_buffer; + struct scic_sds_stp_request *this_request = (struct scic_sds_stp_request *)request; + + status = scic_sds_unsolicited_frame_control_get_header( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_header + ); + + if (status == SCI_SUCCESS) { + switch (frame_header->fis_type) { + case SATA_FIS_TYPE_REGD2H: + scic_sds_unsolicited_frame_control_get_buffer( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_buffer + ); + + scic_sds_controller_copy_sata_response( + &this_request->d2h_reg_fis, (u32 *)frame_header, frame_buffer + ); + + /* The command has completed with error */ + scic_sds_request_set_status( + &this_request->parent, + SCU_TASK_DONE_CHECK_RESPONSE, + SCI_FAILURE_IO_RESPONSE_VALID + ); + break; + + default: + dev_warn(scic_to_dev(request->owning_controller), + "%s: IO Request:0x%p Frame Id:%d protocol " + "violation occurred\n", + __func__, this_request, frame_index); + + scic_sds_request_set_status( + &this_request->parent, + SCU_TASK_DONE_UNEXP_FIS, + SCI_FAILURE_PROTOCOL_VIOLATION + ); + break; + } + + sci_base_state_machine_change_state( + &this_request->parent.parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + + /* Frame has been decoded return it to the controller */ + scic_sds_controller_release_frame( + this_request->parent.owning_controller, frame_index + ); + } else + dev_err(scic_to_dev(request->owning_controller), + "%s: SCIC IO Request 0x%p could not get frame header " + "for frame index %d, status %x\n", + __func__, this_request, frame_index, status); + + return status; +} + +/* --------------------------------------------------------------------------- */ + +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] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_stp_request_non_data_await_h2d_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_request_default_frame_handler, + }, + [SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_request_default_tc_completion_handler, + .event_handler = scic_sds_request_default_event_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( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + 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( + this_request->target_device, this_request + ); +} + +static void scic_sds_stp_request_started_non_data_await_d2h_enter( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + scic_sds_stp_request_started_non_data_substate_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE + ); +} + +/* --------------------------------------------------------------------------- */ + +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, + }, +}; + +#define SCU_MAX_FRAME_BUFFER_SIZE 0x400 /* 1K is the maximum SCU frame data payload */ + +/** + * + * @this_request: + * @length: + * + * This function will transmit DATA_FIS from (current sgl + offset) for input + * parameter length. current sgl and offset is alreay stored in the IO request + * enum sci_status + */ + +static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame( + struct scic_sds_request *this_request, + u32 length) +{ + struct scic_sds_stp_request *this_sds_stp_request = (struct scic_sds_stp_request *)this_request; + sci_base_controller_request_handler_t continue_io; + struct scu_sgl_element *current_sgl; + struct scic_sds_controller *scic; + u32 state; + + /* + * Recycle the TC and reconstruct it for sending out DATA FIS containing + * for the data from current_sgl+offset for the input length */ + struct scu_task_context *task_context = scic_sds_controller_get_task_context_buffer( + this_request->owning_controller, + this_request->io_tag + ); + + if (this_sds_stp_request->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) + current_sgl = &(this_sds_stp_request->type.pio.request_current.sgl_pair->A); + else + current_sgl = &(this_sds_stp_request->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 = SATA_FIS_TYPE_DATA; + + /* send the new TC out. */ + scic = this_request->owning_controller; + state = scic->parent.state_machine.current_state_id; + continue_io = scic_sds_controller_state_handler_table[state].base.continue_io; + return continue_io(&scic->parent, &this_request->target_device->parent, + &this_request->parent); +} + +/** + * + * @this_request: + * + * enum sci_status + */ +static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data( + struct scic_sds_request *this_sds_request) +{ + + 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 *this_sds_stp_request = (struct scic_sds_stp_request *)this_sds_request; + + sgl_offset = this_sds_stp_request->type.pio.request_current.sgl_offset; + + if (this_sds_stp_request->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) { + current_sgl = &(this_sds_stp_request->type.pio.request_current.sgl_pair->A); + remaining_bytes_in_current_sgl = this_sds_stp_request->type.pio.request_current.sgl_pair->A.length - sgl_offset; + } else { + current_sgl = &(this_sds_stp_request->type.pio.request_current.sgl_pair->B); + remaining_bytes_in_current_sgl = this_sds_stp_request->type.pio.request_current.sgl_pair->B.length - sgl_offset; + } + + + if (this_sds_stp_request->type.pio.pio_transfer_bytes > 0) { + if (this_sds_stp_request->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(this_sds_request, remaining_bytes_in_current_sgl); + if (status == SCI_SUCCESS) { + this_sds_stp_request->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(this_sds_stp_request); + sgl_offset = 0; + } + } else if (this_sds_stp_request->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(this_sds_request, this_sds_stp_request->type.pio.pio_transfer_bytes); + + if (status == SCI_SUCCESS) { + /* Sgl offset will be adjusted and saved for future */ + sgl_offset += this_sds_stp_request->type.pio.pio_transfer_bytes; + current_sgl->address_lower += this_sds_stp_request->type.pio.pio_transfer_bytes; + this_sds_stp_request->type.pio.pio_transfer_bytes = 0; + } + } + } + + if (status == SCI_SUCCESS) { + this_sds_stp_request->type.pio.request_current.sgl_offset = sgl_offset; + } + + return status; +} + +/** + * + * @this_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 *this_request, + u8 *data_buffer, + u32 length) +{ + enum sci_status status; + struct scu_sgl_element *current_sgl; + u32 sgl_offset; + u32 data_offset; + u8 *source_address; + u8 *destination_address; + u32 copy_length; + + /* Initial setup to get the current working SGL and the offset within the buffer */ + current_sgl = + (this_request->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) ? + &(this_request->type.pio.request_current.sgl_pair->A) : + &(this_request->type.pio.request_current.sgl_pair->B); + + sgl_offset = this_request->type.pio.request_current.sgl_offset; + + source_address = data_buffer; + data_offset = 0; + + status = SCI_SUCCESS; + + /* While we are still doing Ok and there is more data to transfer */ + while ( + (length > 0) + && (status == SCI_SUCCESS) + ) { + if (current_sgl->length == sgl_offset) { + /* This SGL has been exauhasted so we need to get the next SGL */ + current_sgl = scic_sds_stp_request_pio_get_next_sgl(this_request); + + if (current_sgl == NULL) + status = SCI_FAILURE; + else + sgl_offset = 0; + } else { + dma_addr_t physical_address; + + sci_cb_make_physical_address( + physical_address, + current_sgl->address_upper, + current_sgl->address_lower + ); + + destination_address = (u8 *)scic_cb_get_virtual_address( + this_request->parent.owning_controller, + physical_address + ); + + source_address += data_offset; + destination_address += sgl_offset; + + copy_length = min(length, current_sgl->length - sgl_offset); + + memcpy(destination_address, source_address, copy_length); + + length -= copy_length; + sgl_offset += copy_length; + data_offset += copy_length; + } + } + + this_request->type.pio.request_current.sgl_offset = sgl_offset; + + return status; +} + +/** + * + * @this_request: 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 *this_request, + 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 (this_request->type.pio.pio_transfer_bytes < SCU_MAX_FRAME_BUFFER_SIZE) { + status = scic_sds_stp_request_pio_data_in_copy_data_buffer( + this_request, data_buffer, this_request->type.pio.pio_transfer_bytes); + + if (status == SCI_SUCCESS) + this_request->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( + this_request, data_buffer, SCU_MAX_FRAME_BUFFER_SIZE); + + if (status == SCI_SUCCESS) + this_request->type.pio.pio_transfer_bytes -= SCU_MAX_FRAME_BUFFER_SIZE; + } + + return status; +} + +/** + * + * @this_request: + * @completion_code: + * + * enum sci_status + */ +static enum sci_status scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler( + struct scic_sds_request *this_request, + 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( + this_request, SCU_TASK_DONE_GOOD, SCI_SUCCESS + ); + + sci_base_state_machine_change_state( + &this_request->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( + this_request, + SCU_NORMALIZE_COMPLETION_STATUS(completion_code), + SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR + ); + + sci_base_state_machine_change_state( + &this_request->parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + break; + } + + return status; +} + +/** + * + * @this_request: + * @frame_index: + * + * enum sci_status + */ +static enum sci_status scic_sds_stp_request_pio_await_frame_frame_handler( + struct scic_sds_request *request, + u32 frame_index) +{ + enum sci_status status; + struct sata_fis_header *frame_header; + u32 *frame_buffer; + struct scic_sds_stp_request *this_request; + + this_request = (struct scic_sds_stp_request *)request; + + status = scic_sds_unsolicited_frame_control_get_header( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_header + ); + + if (status == SCI_SUCCESS) { + switch (frame_header->fis_type) { + case SATA_FIS_TYPE_PIO_SETUP: + /* Get from the frame buffer the PIO Setup Data */ + scic_sds_unsolicited_frame_control_get_buffer( + &(this_request->parent.owning_controller->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 */ + this_request->type.pio.pio_transfer_bytes = + (u16)((struct sata_fis_pio_setup *)(&frame_buffer[-1]))->transfter_count; + this_request->type.pio.ending_status = + (u8)((struct sata_fis_pio_setup *)(&frame_buffer[-1]))->ending_status; + + scic_sds_controller_copy_sata_response( + &this_request->d2h_reg_fis, (u32 *)frame_header, frame_buffer + ); + + this_request->d2h_reg_fis.status = + this_request->type.pio.ending_status; + + /* The next state is dependent on whether the request was PIO Data-in or Data out */ + if (this_request->type.pio.sat_protocol == SAT_PROTOCOL_PIO_DATA_IN) { + sci_base_state_machine_change_state( + &this_request->parent.started_substate_machine, + SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE + ); + } else if (this_request->type.pio.sat_protocol == SAT_PROTOCOL_PIO_DATA_OUT) { + /* Transmit data */ + status = scic_sds_stp_request_pio_data_out_transmit_data(request); + if (status == SCI_SUCCESS) { + sci_base_state_machine_change_state( + &this_request->parent.started_substate_machine, + SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE + ); + } + } + break; + + case SATA_FIS_TYPE_SETDEVBITS: + sci_base_state_machine_change_state( + &this_request->parent.started_substate_machine, + SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE + ); + break; + + case SATA_FIS_TYPE_REGD2H: + if ((frame_header->status & ATA_STATUS_REG_BSY_BIT) == 0) { + scic_sds_unsolicited_frame_control_get_buffer( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_buffer + ); + + scic_sds_controller_copy_sata_response( + &this_request->d2h_reg_fis, (u32 *)frame_header, frame_buffer); + + scic_sds_request_set_status( + &this_request->parent, + SCU_TASK_DONE_CHECK_RESPONSE, + SCI_FAILURE_IO_RESPONSE_VALID + ); + + sci_base_state_machine_change_state( + &this_request->parent.parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + } else { + /* + * 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(request->owning_controller), + "%s: SCIC PIO Request 0x%p received " + "D2H Register FIS with BSY status " + "0x%x\n", + __func__, + this_request, + frame_header->status); + } + break; + + default: + break; + } + + /* Frame is decoded return it to the controller */ + scic_sds_controller_release_frame( + this_request->parent.owning_controller, + frame_index + ); + } else + dev_err(scic_to_dev(request->owning_controller), + "%s: SCIC IO Request 0x%p could not get frame header " + "for frame index %d, status %x\n", + __func__, this_request, frame_index, status); + + return status; +} + +/** + * + * @this_request: + * @frame_index: + * + * enum sci_status + */ +static enum sci_status scic_sds_stp_request_pio_data_in_await_data_frame_handler( + struct scic_sds_request *request, + u32 frame_index) +{ + enum sci_status status; + struct sata_fis_header *frame_header; + struct sata_fis_data *frame_buffer; + struct scic_sds_stp_request *this_request; + + this_request = (struct scic_sds_stp_request *)request; + + status = scic_sds_unsolicited_frame_control_get_header( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_header + ); + + if (status == SCI_SUCCESS) { + if (frame_header->fis_type == SATA_FIS_TYPE_DATA) { + if (this_request->type.pio.request_current.sgl_pair == NULL) { + this_request->parent.saved_rx_frame_index = frame_index; + this_request->type.pio.pio_transfer_bytes = 0; + } else { + status = scic_sds_unsolicited_frame_control_get_buffer( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_buffer + ); + + status = scic_sds_stp_request_pio_data_in_copy_data(this_request, (u8 *)frame_buffer); + + /* Frame is decoded return it to the controller */ + scic_sds_controller_release_frame( + this_request->parent.owning_controller, + frame_index + ); + } + + /* + * Check for the end of the transfer, are there more bytes remaining + * for this data transfer */ + if ( + (status == SCI_SUCCESS) + && (this_request->type.pio.pio_transfer_bytes == 0) + ) { + if ((this_request->type.pio.ending_status & ATA_STATUS_REG_BSY_BIT) == 0) { + scic_sds_request_set_status( + &this_request->parent, + SCU_TASK_DONE_CHECK_RESPONSE, + SCI_FAILURE_IO_RESPONSE_VALID + ); + + sci_base_state_machine_change_state( + &this_request->parent.parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + } else { + sci_base_state_machine_change_state( + &this_request->parent.started_substate_machine, + SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE + ); + } + } + } else { + dev_err(scic_to_dev(request->owning_controller), + "%s: SCIC PIO Request 0x%p received frame %d " + "with fis type 0x%02x when expecting a data " + "fis.\n", + __func__, + this_request, + frame_index, + frame_header->fis_type); + + scic_sds_request_set_status( + &this_request->parent, + SCU_TASK_DONE_GOOD, + SCI_FAILURE_IO_REQUIRES_SCSI_ABORT + ); + + sci_base_state_machine_change_state( + &this_request->parent.parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + + /* Frame is decoded return it to the controller */ + scic_sds_controller_release_frame( + this_request->parent.owning_controller, + frame_index + ); + } + } else + dev_err(scic_to_dev(request->owning_controller), + "%s: SCIC IO Request 0x%p could not get frame header " + "for frame index %d, status %x\n", + __func__, this_request, frame_index, status); + + return status; +} + + +/** + * + * @this_request: + * @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 *this_request, + u32 completion_code) +{ + enum sci_status status = SCI_SUCCESS; + bool all_frames_transferred = false; + + struct scic_sds_stp_request *this_scic_sds_stp_request = (struct scic_sds_stp_request *)this_request; + + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + /* Transmit data */ + if (this_scic_sds_stp_request->type.pio.pio_transfer_bytes != 0) { + status = scic_sds_stp_request_pio_data_out_transmit_data(this_request); + if (status == SCI_SUCCESS) { + if (this_scic_sds_stp_request->type.pio.pio_transfer_bytes == 0) + all_frames_transferred = true; + } + } else if (this_scic_sds_stp_request->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( + &this_request->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( + this_request, + SCU_NORMALIZE_COMPLETION_STATUS(completion_code), + SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR + ); + + sci_base_state_machine_change_state( + &this_request->parent.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; +} + +/* --------------------------------------------------------------------------- */ + +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] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_request_default_frame_handler + }, + [SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_request_default_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_stp_request_pio_await_frame_frame_handler + }, + [SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_request_default_tc_completion_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] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_request_default_frame_handler, + } +}; + +static void scic_sds_stp_request_started_pio_await_h2d_completion_enter( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + 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( + this_request->target_device, this_request); +} + +static void scic_sds_stp_request_started_pio_await_frame_enter( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + 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( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + 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( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + scic_sds_stp_request_started_pio_substate_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE + ); +} + +/* --------------------------------------------------------------------------- */ + +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, + } +}; + +static void scic_sds_stp_request_udma_complete_request( + struct scic_sds_request *this_request, + u32 scu_status, + enum sci_status sci_status) +{ + scic_sds_request_set_status( + this_request, scu_status, sci_status + ); + + sci_base_state_machine_change_state( + &this_request->parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); +} + +/** + * + * @this_request: + * @frame_index: + * + * enum sci_status + */ +static enum sci_status scic_sds_stp_request_udma_general_frame_handler( + struct scic_sds_request *this_request, + u32 frame_index) +{ + enum sci_status status; + struct sata_fis_header *frame_header; + u32 *frame_buffer; + + status = scic_sds_unsolicited_frame_control_get_header( + &this_request->owning_controller->uf_control, + frame_index, + (void **)&frame_header + ); + + if ( + (status == SCI_SUCCESS) + && (frame_header->fis_type == SATA_FIS_TYPE_REGD2H) + ) { + scic_sds_unsolicited_frame_control_get_buffer( + &this_request->owning_controller->uf_control, + frame_index, + (void **)&frame_buffer + ); + + scic_sds_controller_copy_sata_response( + &((struct scic_sds_stp_request *)this_request)->d2h_reg_fis, + (u32 *)frame_header, + frame_buffer + ); + } + + scic_sds_controller_release_frame( + this_request->owning_controller, frame_index); + + return status; +} + +/** + * This method process TC completions while in the state where we are waiting + * for TC completions. + * @this_request: + * @completion_code: + * + * enum sci_status + */ +static enum sci_status scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler( + struct scic_sds_request *request, + u32 completion_code) +{ + enum sci_status status = SCI_SUCCESS; + struct scic_sds_stp_request *this_request = (struct scic_sds_stp_request *)request; + + switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { + case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): + scic_sds_stp_request_udma_complete_request( + &this_request->parent, 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 (this_request->d2h_reg_fis.fis_type == SATA_FIS_TYPE_REGD2H) { + scic_sds_remote_device_suspend( + this_request->parent.target_device, + SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code)) + ); + + scic_sds_stp_request_udma_complete_request( + &this_request->parent, + 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( + &this_request->parent.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. */ + 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_CRC_ERR): + scic_sds_remote_device_suspend( + this_request->parent.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( + &this_request->parent, + 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 *this_request, + 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(this_request, frame_index); + + if (status == SCI_SUCCESS) { + scic_sds_stp_request_udma_complete_request( + this_request, + SCU_TASK_DONE_CHECK_RESPONSE, + SCI_FAILURE_IO_RESPONSE_VALID + ); + } + + return status; +} + +/* --------------------------------------------------------------------------- */ + +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] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_stp_request_udma_general_frame_handler, + }, + [SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_request_default_tc_completion_handler, + .event_handler = scic_sds_request_default_event_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( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + 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( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + scic_sds_stp_request_started_udma_substate_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE + ); +} + +/* --------------------------------------------------------------------------- */ + +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, + }, +}; + +/** + * + * @this_request: + * @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 *this_request, + 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( + this_request, SCU_TASK_DONE_GOOD, SCI_SUCCESS + ); + + sci_base_state_machine_change_state( + &this_request->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( + this_request, + SCU_NORMALIZE_COMPLETION_STATUS(completion_code), + SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR + ); + + sci_base_state_machine_change_state( + &this_request->parent.state_machine, SCI_BASE_REQUEST_STATE_COMPLETED + ); + break; + } + + return SCI_SUCCESS; +} + +/** + * + * @this_request: + * @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 *this_request, + 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( + this_request, SCU_TASK_DONE_GOOD, SCI_SUCCESS + ); + + sci_base_state_machine_change_state( + &this_request->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( + this_request, + SCU_NORMALIZE_COMPLETION_STATUS(completion_code), + SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR + ); + + sci_base_state_machine_change_state( + &this_request->parent.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 *request, + u32 frame_index) +{ + enum sci_status status; + struct sata_fis_header *frame_header; + u32 *frame_buffer; + struct scic_sds_stp_request *this_request = (struct scic_sds_stp_request *)request; + + status = scic_sds_unsolicited_frame_control_get_header( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_header + ); + + if (status == SCI_SUCCESS) { + switch (frame_header->fis_type) { + case SATA_FIS_TYPE_REGD2H: + scic_sds_unsolicited_frame_control_get_buffer( + &(this_request->parent.owning_controller->uf_control), + frame_index, + (void **)&frame_buffer + ); + + scic_sds_controller_copy_sata_response( + &this_request->d2h_reg_fis, (u32 *)frame_header, frame_buffer + ); + + /* The command has completed with error */ + scic_sds_request_set_status( + &this_request->parent, + SCU_TASK_DONE_CHECK_RESPONSE, + SCI_FAILURE_IO_RESPONSE_VALID + ); + break; + + default: + dev_warn(scic_to_dev(request->owning_controller), + "%s: IO Request:0x%p Frame Id:%d protocol " + "violation occurred\n", + __func__, + this_request, + frame_index); + + scic_sds_request_set_status( + &this_request->parent, + SCU_TASK_DONE_UNEXP_FIS, + SCI_FAILURE_PROTOCOL_VIOLATION + ); + break; + } + + sci_base_state_machine_change_state( + &this_request->parent.parent.state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED + ); + + /* Frame has been decoded return it to the controller */ + scic_sds_controller_release_frame( + this_request->parent.owning_controller, frame_index + ); + } else + dev_err(scic_to_dev(request->owning_controller), + "%s: SCIC IO Request 0x%p could not get frame header " + "for frame index %d, status %x\n", + __func__, this_request, frame_index, status); + + return status; +} + +/* --------------------------------------------------------------------------- */ + +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] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_asserted_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_request_default_frame_handler, + }, + [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_completion_handler, + .event_handler = scic_sds_request_default_event_handler, + .frame_handler = scic_sds_request_default_frame_handler, + }, + [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = { + .parent.start_handler = scic_sds_request_default_start_handler, + .parent.abort_handler = scic_sds_request_started_state_abort_handler, + .parent.complete_handler = scic_sds_request_default_complete_handler, + .parent.destruct_handler = scic_sds_request_default_destruct_handler, + .tc_completion_handler = scic_sds_request_default_tc_completion_handler, + .event_handler = scic_sds_request_default_event_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( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + 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( + this_request->target_device, this_request + ); +} + +static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + sci_base_controller_request_handler_t continue_io; + struct scu_task_context *task_context; + struct sata_fis_reg_h2d *h2d_fis; + struct scic_sds_controller *scic; + enum sci_status status; + u32 state; + + /* Clear the SRST bit */ + h2d_fis = scic_stp_io_request_get_h2d_reg_address(this_request); + h2d_fis->control = 0; + + /* Clear the TC control bit */ + task_context = scic_sds_controller_get_task_context_buffer( + this_request->owning_controller, this_request->io_tag); + task_context->control_frame = 0; + + scic = this_request->owning_controller; + state = scic->parent.state_machine.current_state_id; + continue_io = scic_sds_controller_state_handler_table[state].base.continue_io; + + status = continue_io(&scic->parent, &this_request->target_device->parent, + &this_request->parent); + + if (status == SCI_SUCCESS) { + SET_STATE_HANDLER( + this_request, + 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( + struct sci_base_object *object) +{ + struct scic_sds_request *this_request = (struct scic_sds_request *)object; + + SET_STATE_HANDLER( + this_request, + scic_sds_stp_request_started_soft_reset_substate_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE + ); +} + +/* --------------------------------------------------------------------------- */ + +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, + }, +}; + |