/* * 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 #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" void scic_sds_stp_request_assign_buffers(struct scic_sds_request *sci_req) { if (sci_req->was_tag_assigned_by_user == false) sci_req->task_context_buffer = &sci_req->tc; } /** * 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; }