diff options
Diffstat (limited to 'drivers/scsi/isci/request.c')
| -rw-r--r-- | drivers/scsi/isci/request.c | 469 |
1 files changed, 163 insertions, 306 deletions
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c index 08a7340b..55859d5 100644 --- a/drivers/scsi/isci/request.c +++ b/drivers/scsi/isci/request.c @@ -61,42 +61,50 @@ #include "scu_event_codes.h" #include "sas.h" -/** - * This method returns the sgl element pair for the specificed sgl_pair index. - * @sci_req: This parameter specifies the IO request for which to retrieve - * the Scatter-Gather List element pair. - * @sgl_pair_index: This parameter specifies the index into the SGL element - * pair to be retrieved. - * - * This method returns a pointer to an struct scu_sgl_element_pair. - */ -static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair( - struct scic_sds_request *sci_req, - u32 sgl_pair_index - ) { - struct scu_task_context *task_context; +static struct scu_sgl_element_pair *to_sgl_element_pair(struct scic_sds_request *sci_req, + int idx) +{ + if (idx == 0) + return &sci_req->tc->sgl_pair_ab; + else if (idx == 1) + return &sci_req->tc->sgl_pair_cd; + else if (idx < 0) + return NULL; + else + return &sci_req->sg_table[idx - 2]; +} - task_context = (struct scu_task_context *)sci_req->task_context_buffer; +static dma_addr_t to_sgl_element_pair_dma(struct scic_sds_controller *scic, + struct scic_sds_request *sci_req, u32 idx) +{ + u32 offset; - if (sgl_pair_index == 0) { - return &task_context->sgl_pair_ab; - } else if (sgl_pair_index == 1) { - return &task_context->sgl_pair_cd; + if (idx == 0) { + offset = (void *) &sci_req->tc->sgl_pair_ab - + (void *) &scic->task_context_table[0]; + return scic->task_context_dma + offset; + } else if (idx == 1) { + offset = (void *) &sci_req->tc->sgl_pair_cd - + (void *) &scic->task_context_table[0]; + return scic->task_context_dma + offset; } - return &sci_req->sg_table[sgl_pair_index - 2]; + return scic_io_request_get_dma_addr(sci_req, &sci_req->sg_table[idx - 2]); +} + +static void init_sgl_element(struct scu_sgl_element *e, struct scatterlist *sg) +{ + e->length = sg_dma_len(sg); + e->address_upper = upper_32_bits(sg_dma_address(sg)); + e->address_lower = lower_32_bits(sg_dma_address(sg)); + e->address_modifier = 0; } -/** - * This function will build the SGL list for an IO request. - * @sci_req: This parameter specifies the IO request for which to build - * the Scatter-Gather List. - * - */ static void scic_sds_request_build_sgl(struct scic_sds_request *sds_request) { struct isci_request *isci_request = sci_req_to_ireq(sds_request); struct isci_host *isci_host = isci_request->isci_host; + struct scic_sds_controller *scic = &isci_host->sci; struct sas_task *task = isci_request_access_task(isci_request); struct scatterlist *sg = NULL; dma_addr_t dma_addr; @@ -108,25 +116,19 @@ static void scic_sds_request_build_sgl(struct scic_sds_request *sds_request) sg = task->scatter; while (sg) { - scu_sg = scic_sds_request_get_sgl_element_pair( - sds_request, - sg_idx); - - SCU_SGL_COPY(scu_sg->A, sg); - + scu_sg = to_sgl_element_pair(sds_request, sg_idx); + init_sgl_element(&scu_sg->A, sg); sg = sg_next(sg); - if (sg) { - SCU_SGL_COPY(scu_sg->B, sg); + init_sgl_element(&scu_sg->B, sg); sg = sg_next(sg); } else - SCU_SGL_ZERO(scu_sg->B); + memset(&scu_sg->B, 0, sizeof(scu_sg->B)); if (prev_sg) { - dma_addr = - scic_io_request_get_dma_addr( - sds_request, - scu_sg); + dma_addr = to_sgl_element_pair_dma(scic, + sds_request, + sg_idx); prev_sg->next_pair_upper = upper_32_bits(dma_addr); @@ -138,8 +140,7 @@ static void scic_sds_request_build_sgl(struct scic_sds_request *sds_request) sg_idx++; } } else { /* handle when no sg */ - scu_sg = scic_sds_request_get_sgl_element_pair(sds_request, - sg_idx); + scu_sg = to_sgl_element_pair(sds_request, sg_idx); dma_addr = dma_map_single(&isci_host->pdev->dev, task->scatter, @@ -246,35 +247,12 @@ static void scu_ssp_reqeust_construct_task_context( /* task_context->type.ssp.tag = sci_req->io_tag; */ task_context->task_phase = 0x01; - if (sds_request->was_tag_assigned_by_user) { - /* - * Build the task context now since we have already read - * the data - */ - sds_request->post_context = - (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | - (scic_sds_controller_get_protocol_engine_group( - controller) << - SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | - (scic_sds_port_get_index(target_port) << - SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | - ISCI_TAG_TCI(sds_request->io_tag)); - } else { - /* - * Build the task context now since we have already read - * the data - * - * I/O tag index is not assigned because we have to wait - * until we get a TCi - */ - sds_request->post_context = - (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | - (scic_sds_controller_get_protocol_engine_group( - owning_controller) << - SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | - (scic_sds_port_get_index(target_port) << - SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT)); - } + sds_request->post_context = (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + (scic_sds_controller_get_protocol_engine_group(controller) << + SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | + (scic_sds_port_get_index(target_port) << + SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | + ISCI_TAG_TCI(sds_request->io_tag)); /* * Copy the physical address for the command buffer to the @@ -302,14 +280,11 @@ static void scu_ssp_reqeust_construct_task_context( * @sci_req: * */ -static void scu_ssp_io_request_construct_task_context( - struct scic_sds_request *sci_req, - enum dma_data_direction dir, - u32 len) +static void scu_ssp_io_request_construct_task_context(struct scic_sds_request *sci_req, + enum dma_data_direction dir, + u32 len) { - struct scu_task_context *task_context; - - task_context = scic_sds_request_get_task_context(sci_req); + struct scu_task_context *task_context = sci_req->tc; scu_ssp_reqeust_construct_task_context(sci_req, task_context); @@ -347,12 +322,9 @@ static void scu_ssp_io_request_construct_task_context( * constructed. * */ -static void scu_ssp_task_request_construct_task_context( - struct scic_sds_request *sci_req) +static void scu_ssp_task_request_construct_task_context(struct scic_sds_request *sci_req) { - struct scu_task_context *task_context; - - task_context = scic_sds_request_get_task_context(sci_req); + struct scu_task_context *task_context = sci_req->tc; scu_ssp_reqeust_construct_task_context(sci_req, task_context); @@ -421,35 +393,12 @@ static void scu_sata_reqeust_construct_task_context( /* 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) | - ISCI_TAG_TCI(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)); - } - + 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) | + ISCI_TAG_TCI(sci_req->io_tag)); /* * Copy the physical address for the command buffer to the SCU Task * Context. We must offset the command buffer by 4 bytes because the @@ -467,22 +416,9 @@ static void scu_sata_reqeust_construct_task_context( task_context->response_iu_lower = 0; } - - -/** - * 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) +static void scu_stp_raw_request_construct_task_context(struct scic_sds_request *sci_req) { - struct scic_sds_request *sci_req = to_sci_req(stp_req); + struct scu_task_context *task_context = sci_req->tc; scu_sata_reqeust_construct_task_context(sci_req, task_context); @@ -500,8 +436,7 @@ scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req, struct scic_sds_stp_request *stp_req = &sci_req->stp.req; struct scic_sds_stp_pio_request *pio = &stp_req->type.pio; - scu_stp_raw_request_construct_task_context(stp_req, - sci_req->task_context_buffer); + scu_stp_raw_request_construct_task_context(sci_req); pio->current_transfer_bytes = 0; pio->ending_error = 0; @@ -512,13 +447,10 @@ scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req, 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; + pio->request_current.sgl_index = 0; } else { /* The user does not want the data copied to the SGL buffer location */ - pio->request_current.sgl_pair = NULL; + pio->request_current.sgl_index = -1; } return SCI_SUCCESS; @@ -541,7 +473,7 @@ static void scic_sds_stp_optimized_request_construct(struct scic_sds_request *sc u32 len, enum dma_data_direction dir) { - struct scu_task_context *task_context = sci_req->task_context_buffer; + struct scu_task_context *task_context = sci_req->tc; /* Build the STP task context structure */ scu_sata_reqeust_construct_task_context(sci_req, task_context); @@ -587,8 +519,7 @@ scic_io_request_construct_sata(struct scic_sds_request *sci_req, if (tmf->tmf_code == isci_tmf_sata_srst_high || tmf->tmf_code == isci_tmf_sata_srst_low) { - scu_stp_raw_request_construct_task_context(&sci_req->stp.req, - sci_req->task_context_buffer); + scu_stp_raw_request_construct_task_context(sci_req); return SCI_SUCCESS; } else { dev_err(scic_to_dev(sci_req->owning_controller), @@ -611,8 +542,7 @@ scic_io_request_construct_sata(struct scic_sds_request *sci_req, /* non data */ if (task->data_dir == DMA_NONE) { - scu_stp_raw_request_construct_task_context(&sci_req->stp.req, - sci_req->task_context_buffer); + scu_stp_raw_request_construct_task_context(sci_req); return SCI_SUCCESS; } @@ -701,8 +631,7 @@ enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_re if (tmf->tmf_code == isci_tmf_sata_srst_high || tmf->tmf_code == isci_tmf_sata_srst_low) { - scu_stp_raw_request_construct_task_context(&sci_req->stp.req, - sci_req->task_context_buffer); + scu_stp_raw_request_construct_task_context(sci_req); } else { dev_err(scic_to_dev(sci_req->owning_controller), "%s: Request 0x%p received un-handled SAT " @@ -749,9 +678,9 @@ static u32 sci_req_tx_bytes(struct scic_sds_request *sci_req) enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req) { - struct scic_sds_controller *scic = sci_req->owning_controller; - struct scu_task_context *task_context; enum sci_base_request_states state; + struct scu_task_context *tc = sci_req->tc; + struct scic_sds_controller *scic = sci_req->owning_controller; state = sci_req->sm.current_state_id; if (state != SCI_REQ_CONSTRUCTED) { @@ -761,61 +690,39 @@ enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req) return SCI_FAILURE_INVALID_STATE; } - /* if necessary, allocate a TCi for the io request object and then will, - * if necessary, copy the constructed TC data into the actual TC buffer. - * If everything is successful the post context field is updated with - * the TCi so the controller can post the request to the hardware. - */ - if (sci_req->io_tag == SCI_CONTROLLER_INVALID_IO_TAG) - sci_req->io_tag = scic_controller_allocate_io_tag(scic); - - /* Record the IO Tag in the request */ - if (sci_req->io_tag != SCI_CONTROLLER_INVALID_IO_TAG) { - task_context = sci_req->task_context_buffer; - - task_context->task_index = ISCI_TAG_TCI(sci_req->io_tag); - - switch (task_context->protocol_type) { - case SCU_TASK_CONTEXT_PROTOCOL_SMP: - case SCU_TASK_CONTEXT_PROTOCOL_SSP: - /* SSP/SMP Frame */ - task_context->type.ssp.tag = sci_req->io_tag; - task_context->type.ssp.target_port_transfer_tag = - 0xFFFF; - break; + tc->task_index = ISCI_TAG_TCI(sci_req->io_tag); - case SCU_TASK_CONTEXT_PROTOCOL_STP: - /* STP/SATA Frame - * task_context->type.stp.ncq_tag = sci_req->ncq_tag; - */ - break; - - case SCU_TASK_CONTEXT_PROTOCOL_NONE: - /* / @todo When do we set no protocol type? */ - break; + switch (tc->protocol_type) { + case SCU_TASK_CONTEXT_PROTOCOL_SMP: + case SCU_TASK_CONTEXT_PROTOCOL_SSP: + /* SSP/SMP Frame */ + tc->type.ssp.tag = sci_req->io_tag; + tc->type.ssp.target_port_transfer_tag = 0xFFFF; + break; - default: - /* This should never happen since we build the IO - * requests */ - break; - } + case SCU_TASK_CONTEXT_PROTOCOL_STP: + /* STP/SATA Frame + * tc->type.stp.ncq_tag = sci_req->ncq_tag; + */ + break; - /* - * Check to see if we need to copy the task context buffer - * or have been building into the task context buffer */ - if (sci_req->was_tag_assigned_by_user == false) - scic_sds_controller_copy_task_context(scic, sci_req); + case SCU_TASK_CONTEXT_PROTOCOL_NONE: + /* / @todo When do we set no protocol type? */ + break; - /* Add to the post_context the io tag value */ - sci_req->post_context |= ISCI_TAG_TCI(sci_req->io_tag); + default: + /* This should never happen since we build the IO + * requests */ + break; + } - /* Everything is good go ahead and change state */ - sci_change_state(&sci_req->sm, SCI_REQ_STARTED); + /* Add to the post_context the io tag value */ + sci_req->post_context |= ISCI_TAG_TCI(sci_req->io_tag); - return SCI_SUCCESS; - } + /* Everything is good go ahead and change state */ + sci_change_state(&sci_req->sm, SCI_REQ_STARTED); - return SCI_FAILURE_INSUFFICIENT_RESOURCES; + return SCI_SUCCESS; } enum sci_status @@ -880,9 +787,6 @@ enum sci_status scic_sds_request_complete(struct scic_sds_request *sci_req) "isci: request completion from wrong state (%d)\n", state)) return SCI_FAILURE_INVALID_STATE; - if (!sci_req->was_tag_assigned_by_user) - scic_controller_free_io_tag(scic, sci_req->io_tag); - if (sci_req->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX) scic_sds_controller_release_frame(scic, sci_req->saved_rx_frame_index); @@ -1244,51 +1148,40 @@ void scic_stp_io_request_set_ncq_tag(struct scic_sds_request *req, * @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; + req->tc->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) +static struct scu_sgl_element *pio_sgl_next(struct scic_sds_stp_request *stp_req) { - struct scu_sgl_element *current_sgl; + struct scu_sgl_element *sgl; + struct scu_sgl_element_pair *sgl_pair; 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; + sgl_pair = to_sgl_element_pair(sci_req, pio_sgl->sgl_index); + if (!sgl_pair) + sgl = NULL; + else if (pio_sgl->sgl_set == SCU_SGL_ELEMENT_PAIR_A) { + if (sgl_pair->B.address_lower == 0 && + sgl_pair->B.address_upper == 0) { + sgl = NULL; } else { pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_B; - current_sgl = &pio_sgl->sgl_pair->B; + 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; + if (sgl_pair->next_pair_lower == 0 && + sgl_pair->next_pair_upper == 0) { + 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_index++; pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_A; - current_sgl = &pio_sgl->sgl_pair->A; + sgl_pair = to_sgl_element_pair(sci_req, pio_sgl->sgl_index); + sgl = &sgl_pair->A; } } - return current_sgl; + return sgl; } static enum sci_status @@ -1328,21 +1221,19 @@ 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_task_context *task_context = sci_req->tc; + struct scu_sgl_element_pair *sgl_pair; 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); - + sgl_pair = to_sgl_element_pair(sci_req, stp_req->type.pio.request_current.sgl_index); 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; + current_sgl = &sgl_pair->A; else - current_sgl = &stp_req->type.pio.request_current.sgl_pair->B; + current_sgl = &sgl_pair->B; /* update the TC */ task_context->command_iu_upper = current_sgl->address_upper; @@ -1362,18 +1253,21 @@ static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data(struct sc u32 remaining_bytes_in_current_sgl = 0; enum sci_status status = SCI_SUCCESS; struct scic_sds_stp_request *stp_req = &sci_req->stp.req; + struct scu_sgl_element_pair *sgl_pair; sgl_offset = stp_req->type.pio.request_current.sgl_offset; + sgl_pair = to_sgl_element_pair(sci_req, stp_req->type.pio.request_current.sgl_index); + if (WARN_ONCE(!sgl_pair, "%s: null sgl element", __func__)) + return SCI_FAILURE; 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; + current_sgl = &sgl_pair->A; + remaining_bytes_in_current_sgl = 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; + current_sgl = &sgl_pair->B; + remaining_bytes_in_current_sgl = 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 */ @@ -1382,7 +1276,7 @@ static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data(struct sc 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); + current_sgl = pio_sgl_next(stp_req); sgl_offset = 0; } } else if (stp_req->type.pio.pio_transfer_bytes < remaining_bytes_in_current_sgl) { @@ -1945,7 +1839,7 @@ scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req, return status; } - if (stp_req->type.pio.request_current.sgl_pair == NULL) { + if (stp_req->type.pio.request_current.sgl_index < 0) { sci_req->saved_rx_frame_index = frame_index; stp_req->type.pio.pio_transfer_bytes = 0; } else { @@ -2977,8 +2871,6 @@ static void isci_request_io_request_complete(struct isci_host *isci_host, * task to recognize the already completed case. */ request->terminated = true; - - isci_host_can_dequeue(isci_host, 1); } static void scic_sds_request_started_state_enter(struct sci_base_state_machine *sm) @@ -3039,7 +2931,7 @@ static void scic_sds_request_aborting_state_enter(struct sci_base_state_machine struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), sm); /* Setting the abort bit in the Task Context is required by the silicon. */ - sci_req->task_context_buffer->abort = 1; + sci_req->tc->abort = 1; } static void scic_sds_stp_request_started_non_data_await_h2d_completion_enter(struct sci_base_state_machine *sm) @@ -3069,7 +2961,7 @@ static void scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completio static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter(struct sci_base_state_machine *sm) { struct scic_sds_request *sci_req = container_of(sm, typeof(*sci_req), sm); - struct scu_task_context *task_context; + struct scu_task_context *tc = sci_req->tc; struct host_to_dev_fis *h2d_fis; enum sci_status status; @@ -3078,9 +2970,7 @@ static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_complet 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; + tc->control_frame = 0; status = scic_controller_continue_io(sci_req); WARN_ONCE(status != SCI_SUCCESS, "isci: continue io failure\n"); @@ -3141,18 +3031,10 @@ scic_sds_general_request_construct(struct scic_sds_controller *scic, sci_req->sci_status = SCI_SUCCESS; sci_req->scu_status = 0; sci_req->post_context = 0xFFFFFFFF; + sci_req->tc = &scic->task_context_table[ISCI_TAG_TCI(io_tag)]; sci_req->is_task_management_request = false; - - if (io_tag == SCI_CONTROLLER_INVALID_IO_TAG) { - sci_req->was_tag_assigned_by_user = false; - sci_req->task_context_buffer = &sci_req->tc; - } else { - sci_req->was_tag_assigned_by_user = true; - - sci_req->task_context_buffer = - scic_sds_controller_get_task_context_buffer(scic, io_tag); - } + WARN_ONCE(io_tag == SCI_CONTROLLER_INVALID_IO_TAG, "straggling invalid tag usage\n"); } static enum sci_status @@ -3178,8 +3060,7 @@ scic_io_request_construct(struct scic_sds_controller *scic, else return SCI_FAILURE_UNSUPPORTED_PROTOCOL; - memset(sci_req->task_context_buffer, 0, - offsetof(struct scu_task_context, sgl_pair_ab)); + memset(sci_req->tc, 0, offsetof(struct scu_task_context, sgl_pair_ab)); return status; } @@ -3197,7 +3078,7 @@ enum sci_status scic_task_request_construct(struct scic_sds_controller *scic, if (dev->dev_type == SAS_END_DEV || dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { sci_req->is_task_management_request = true; - memset(sci_req->task_context_buffer, 0, sizeof(struct scu_task_context)); + memset(sci_req->tc, 0, sizeof(struct scu_task_context)); } else status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; @@ -3299,7 +3180,7 @@ scic_io_request_construct_smp(struct device *dev, /* byte swap the smp request. */ - task_context = scic_sds_request_get_task_context(sci_req); + task_context = sci_req->tc; sci_dev = scic_sds_request_get_device(sci_req); sci_port = scic_sds_request_get_port(sci_req); @@ -3354,33 +3235,12 @@ scic_io_request_construct_smp(struct device *dev, */ task_context->task_phase = 0; - 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(scic) << - SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | - (scic_sds_port_get_index(sci_port) << - SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | - ISCI_TAG_TCI(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(scic) << - SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | - (scic_sds_port_get_index(sci_port) << - SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT)); - } - + sci_req->post_context = (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + (scic_sds_controller_get_protocol_engine_group(scic) << + SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | + (scic_sds_port_get_index(sci_port) << + SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | + ISCI_TAG_TCI(sci_req->io_tag)); /* * Copy the physical address for the command buffer to the SCU Task * Context command buffer should not contain command header. @@ -3431,10 +3291,10 @@ static enum sci_status isci_smp_request_build(struct isci_request *ireq) * * SCI_SUCCESS on successfull completion, or specific failure code. */ -static enum sci_status isci_io_request_build( - struct isci_host *isci_host, - struct isci_request *request, - struct isci_remote_device *isci_device) +static enum sci_status isci_io_request_build(struct isci_host *isci_host, + struct isci_request *request, + struct isci_remote_device *isci_device, + u16 tag) { enum sci_status status = SCI_SUCCESS; struct sas_task *task = isci_request_access_task(request); @@ -3471,8 +3331,7 @@ static enum sci_status isci_io_request_build( * we will let the core allocate the IO tag. */ status = scic_io_request_construct(&isci_host->sci, sci_device, - SCI_CONTROLLER_INVALID_IO_TAG, - &request->sci); + tag, &request->sci); if (status != SCI_SUCCESS) { dev_warn(&isci_host->pdev->dev, @@ -3564,7 +3423,7 @@ struct isci_request *isci_request_alloc_tmf(struct isci_host *ihost, } int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *idev, - struct sas_task *task, gfp_t gfp_flags) + struct sas_task *task, u16 tag, gfp_t gfp_flags) { enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; struct isci_request *ireq; @@ -3576,7 +3435,7 @@ int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *ide if (!ireq) goto out; - status = isci_io_request_build(ihost, ireq, idev); + status = isci_io_request_build(ihost, ireq, idev, tag); if (status != SCI_SUCCESS) { dev_warn(&ihost->pdev->dev, "%s: request_construct failed - status = 0x%x\n", @@ -3599,18 +3458,16 @@ int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *ide */ status = scic_controller_start_task(&ihost->sci, &idev->sci, - &ireq->sci, - SCI_CONTROLLER_INVALID_IO_TAG); + &ireq->sci); } else { status = SCI_FAILURE; } } else { - /* send the request, let the core assign the IO TAG. */ status = scic_controller_start_io(&ihost->sci, &idev->sci, - &ireq->sci, - SCI_CONTROLLER_INVALID_IO_TAG); + &ireq->sci); } + if (status != SCI_SUCCESS && status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { dev_warn(&ihost->pdev->dev, @@ -3647,23 +3504,23 @@ int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *ide if (status == SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { /* Signal libsas that we need the SCSI error - * handler thread to work on this I/O and that - * we want a device reset. - */ + * handler thread to work on this I/O and that + * we want a device reset. + */ spin_lock_irqsave(&task->task_state_lock, flags); task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; spin_unlock_irqrestore(&task->task_state_lock, flags); /* Cause this task to be scheduled in the SCSI error - * handler thread. - */ + * handler thread. + */ isci_execpath_callback(ihost, task, sas_task_abort); /* Change the status, since we are holding - * the I/O until it is managed by the SCSI - * error handler. - */ + * the I/O until it is managed by the SCSI + * error handler. + */ status = SCI_SUCCESS; } |
