diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/isci/Makefile | 1 | ||||
| -rw-r--r-- | drivers/scsi/isci/request.c | 1605 | ||||
| -rw-r--r-- | drivers/scsi/isci/request.h | 113 | ||||
| -rw-r--r-- | drivers/scsi/isci/stp_request.c | 1584 | ||||
| -rw-r--r-- | drivers/scsi/isci/stp_request.h | 195 |
5 files changed, 1571 insertions, 1927 deletions
diff --git a/drivers/scsi/isci/Makefile b/drivers/scsi/isci/Makefile index be2b67d0df8..86b0c88e91a 100644 --- a/drivers/scsi/isci/Makefile +++ b/drivers/scsi/isci/Makefile @@ -6,5 +6,4 @@ isci-objs := init.o phy.o request.o sata.o \ remote_node_context.o \ remote_node_table.o \ unsolicited_frame_control.o \ - stp_request.o \ port_config.o \ diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c index 5201dc58a19..f503e3e18d8 100644 --- a/drivers/scsi/isci/request.c +++ b/drivers/scsi/isci/request.c @@ -58,6 +58,7 @@ #include "request.h" #include "sata.h" #include "scu_completion_codes.h" +#include "scu_event_codes.h" #include "sas.h" /** @@ -92,7 +93,7 @@ static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair( * the Scatter-Gather List. * */ -void scic_sds_request_build_sgl(struct scic_sds_request *sds_request) +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; @@ -366,27 +367,214 @@ static void scu_ssp_task_request_construct_task_context( sizeof(struct ssp_task_iu) / sizeof(u32); } +/** + * 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; +} + + /** - * This method constructs the SSP Command IU data for this ssp passthrough - * comand request object. - * @sci_req: This parameter specifies the request object for which the SSP - * command information unit is being built. + * 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. * - * enum sci_status, returns invalid parameter is cdb > 16 + * 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); +} + +static 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; + + 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; + } + + return SCI_SUCCESS; +} /** - * This method constructs the SATA request object. - * @sci_req: - * @sat_protocol: - * @transfer_length: - * @data_direction: - * @copy_rx_frame: * - * enum sci_status + * @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; + } +} + + + static enum sci_status scic_io_request_construct_sata(struct scic_sds_request *sci_req, u32 len, @@ -402,9 +590,11 @@ scic_io_request_construct_sata(struct scic_sds_request *sci_req, struct isci_tmf *tmf = isci_request_access_tmf(ireq); if (tmf->tmf_code == isci_tmf_sata_srst_high || - tmf->tmf_code == isci_tmf_sata_srst_low) - return scic_sds_stp_soft_reset_request_construct(sci_req); - else { + tmf->tmf_code == isci_tmf_sata_srst_low) { + scu_stp_raw_request_construct_task_context(&sci_req->stp.req, + sci_req->task_context_buffer); + return SCI_SUCCESS; + } else { dev_err(scic_to_dev(sci_req->owning_controller), "%s: Request 0x%p received un-handled SAT " "management protocol 0x%x.\n", @@ -424,17 +614,27 @@ scic_io_request_construct_sata(struct scic_sds_request *sci_req, } /* non data */ - if (task->data_dir == DMA_NONE) - return scic_sds_stp_non_data_request_construct(sci_req); + if (task->data_dir == DMA_NONE) { + scu_stp_raw_request_construct_task_context(&sci_req->stp.req, + sci_req->task_context_buffer); + return SCI_SUCCESS; + } /* NCQ */ - if (task->ata_task.use_ncq) - return scic_sds_stp_ncq_request_construct(sci_req, len, dir); + if (task->ata_task.use_ncq) { + scic_sds_stp_optimized_request_construct(sci_req, + SCU_TASK_TYPE_FPDMAQ_READ, + len, dir); + return SCI_SUCCESS; + } /* DMA */ - if (task->ata_task.dma_xfer) - return scic_sds_stp_udma_request_construct(sci_req, len, dir); - else /* PIO */ + if (task->ata_task.dma_xfer) { + scic_sds_stp_optimized_request_construct(sci_req, + SCU_TASK_TYPE_DMA_IN, + len, dir); + return SCI_SUCCESS; + } else /* PIO */ return scic_sds_stp_pio_request_construct(sci_req, copy); return status; @@ -453,9 +653,8 @@ static enum sci_status scic_io_request_construct_basic_ssp(struct scic_sds_reque scic_sds_io_request_build_ssp_command_iu(sci_req); - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_CONSTRUCTED); + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_CONSTRUCTED); return SCI_SUCCESS; } @@ -470,12 +669,11 @@ enum sci_status scic_task_request_construct_ssp( scic_sds_task_request_build_ssp_task_iu(sci_req); sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_CONSTRUCTED); + SCI_BASE_REQUEST_STATE_CONSTRUCTED); return SCI_SUCCESS; } - static enum sci_status scic_io_request_construct_basic_sata(struct scic_sds_request *sci_req) { enum sci_status status; @@ -496,12 +694,11 @@ static enum sci_status scic_io_request_construct_basic_sata(struct scic_sds_requ if (status == SCI_SUCCESS) sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_CONSTRUCTED); + SCI_BASE_REQUEST_STATE_CONSTRUCTED); return status; } - enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req) { enum sci_status status = SCI_SUCCESS; @@ -513,7 +710,8 @@ 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) { - status = scic_sds_stp_soft_reset_request_construct(sci_req); + scu_stp_raw_request_construct_task_context(&sci_req->stp.req, + sci_req->task_context_buffer); } else { dev_err(scic_to_dev(sci_req->owning_controller), "%s: Request 0x%p received un-handled SAT " @@ -524,10 +722,10 @@ enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_re } } - if (status == SCI_SUCCESS) - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_CONSTRUCTED); + if (status != SCI_SUCCESS) + return status; + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_CONSTRUCTED); return status; } @@ -724,7 +922,7 @@ static enum sci_status scic_sds_request_constructed_state_start_handler( /* Everything is good go ahead and change state */ sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_STARTED); + SCI_BASE_REQUEST_STATE_STARTED); return SCI_SUCCESS; } @@ -749,29 +947,14 @@ static enum sci_status scic_sds_request_constructed_state_abort_handler( SCI_FAILURE_IO_TERMINATED); sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + SCI_BASE_REQUEST_STATE_COMPLETED); return SCI_SUCCESS; } -/* - * ***************************************************************************** - * * STARTED STATE HANDLERS - * ***************************************************************************** */ - -/* - * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T - * object receives a scic_sds_request_terminate() request. Since the request - * has been posted to the hardware the io request state is changed to the - * aborting state. enum sci_status SCI_SUCCESS - */ -enum sci_status scic_sds_request_started_state_abort_handler( - struct scic_sds_request *request) +static enum sci_status scic_sds_request_started_state_abort_handler(struct scic_sds_request *sci_req) { - if (request->has_started_substate_machine) - sci_base_state_machine_stop(&request->started_substate_machine); - - sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_ABORTING); + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_ABORTING); return SCI_SUCCESS; } @@ -943,19 +1126,15 @@ scic_sds_request_started_state_tc_completion_handler(struct scic_sds_request *sc */ /* In all cases we will treat this as the completion of the IO req. */ - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED); return SCI_SUCCESS; } enum sci_status scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code) { - if (request->state_machine.current_state_id == SCI_BASE_REQUEST_STATE_STARTED && - request->has_started_substate_machine == false) - return scic_sds_request_started_state_tc_completion_handler(request, completion_code); - else if (request->state_handlers->tc_completion_handler) + if (request->state_handlers->tc_completion_handler) return request->state_handlers->tc_completion_handler(request, completion_code); dev_warn(scic_to_dev(request->owning_controller), @@ -1064,7 +1243,7 @@ static enum sci_status scic_sds_request_completed_state_complete_handler( } sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_FINAL); + SCI_BASE_REQUEST_STATE_FINAL); return SCI_SUCCESS; } @@ -1084,7 +1263,7 @@ static enum sci_status scic_sds_request_aborting_state_abort_handler( struct scic_sds_request *request) { sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + SCI_BASE_REQUEST_STATE_COMPLETED); return SCI_SUCCESS; } @@ -1107,7 +1286,7 @@ static enum sci_status scic_sds_request_aborting_state_tc_completion_handler( ); sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + SCI_BASE_REQUEST_STATE_COMPLETED); break; default: @@ -1161,7 +1340,7 @@ static enum sci_status scic_sds_ssp_task_request_await_tc_completion_tc_completi SCI_SUCCESS); sci_base_state_machine_change_state(&sci_req->state_machine, - SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE); + SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE); break; case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO): @@ -1178,7 +1357,7 @@ static enum sci_status scic_sds_ssp_task_request_await_tc_completion_tc_completi completion_code); sci_base_state_machine_change_state(&sci_req->state_machine, - SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE); + SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE); break; default: @@ -1192,7 +1371,7 @@ static enum sci_status scic_sds_ssp_task_request_await_tc_completion_tc_completi ); sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + SCI_BASE_REQUEST_STATE_COMPLETED); break; } @@ -1215,9 +1394,9 @@ static enum sci_status scic_sds_ssp_task_request_await_tc_response_abort_handler struct scic_sds_request *request) { sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_ABORTING); + SCI_BASE_REQUEST_STATE_ABORTING); sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + SCI_BASE_REQUEST_STATE_COMPLETED); return SCI_SUCCESS; } @@ -1243,7 +1422,7 @@ static enum sci_status scic_sds_ssp_task_request_await_tc_response_frame_handler scic_sds_io_request_copy_response(request); sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + SCI_BASE_REQUEST_STATE_COMPLETED); scic_sds_controller_release_frame(request->owning_controller, frame_index); return SCI_SUCCESS; @@ -1270,13 +1449,11 @@ static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler /* * In the AWAIT RESPONSE state, any TC completion is unexpected. * but if the TC has success status, we complete the IO anyway. */ - scic_sds_request_set_status( - sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS - ); + scic_sds_request_set_status(sci_req, SCU_TASK_DONE_GOOD, + SCI_SUCCESS); - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED); break; case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR): @@ -1288,13 +1465,11 @@ static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler * is not able to send smp response within 2 ms. This causes our hardware * break the connection and set TC completion with one of these SMP_XXX_XX_ERR * status. For these type of error, we ask scic user to retry the request. */ - scic_sds_request_set_status( - sci_req, SCU_TASK_DONE_SMP_RESP_TO_ERR, SCI_FAILURE_RETRY_REQUIRED - ); + scic_sds_request_set_status(sci_req, SCU_TASK_DONE_SMP_RESP_TO_ERR, + SCI_FAILURE_RETRY_REQUIRED); - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED); break; default: @@ -1307,9 +1482,8 @@ static enum sci_status scic_sds_smp_request_await_response_tc_completion_handler SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR ); - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED); break; } @@ -1365,7 +1539,7 @@ scic_sds_smp_request_await_response_frame_handler(struct scic_sds_request *sci_r sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS); sci_base_state_machine_change_state(&sci_req->state_machine, - SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION); + SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION); } else { /* This was not a response frame why did it get forwarded? */ dev_err(scic_to_dev(sci_req->owning_controller), @@ -1381,9 +1555,8 @@ scic_sds_smp_request_await_response_frame_handler(struct scic_sds_request *sci_r SCU_TASK_DONE_SMP_FRM_TYPE_ERR, SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + sci_base_state_machine_change_state(&sci_req->state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED); } scic_sds_controller_release_frame(sci_req->owning_controller, @@ -1411,14 +1584,111 @@ static enum sci_status scic_sds_smp_request_await_tc_completion_tc_completion_ha { 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->state_machine, + SCI_BASE_REQUEST_STATE_COMPLETED); + 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_TASK_DONE_GOOD, SCI_SUCCESS + 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; +} + +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->state_machine, + SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE + ); + break; default: /* @@ -1431,14 +1701,861 @@ static enum sci_status scic_sds_smp_request_await_tc_completion_tc_completion_ha ); 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; +} + +#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->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); + 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->state_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->state_machine, + SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE); + } + break; + case FIS_SETDEVBITS: + sci_base_state_machine_change_state(&sci_req->state_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->state_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->state_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->state_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 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->state_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; +} + +enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req, + u32 len, + enum dma_data_direction dir) +{ + 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->state_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->state_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_request_state_handler_table[] = { [SCI_BASE_REQUEST_STATE_INITIAL] = { }, [SCI_BASE_REQUEST_STATE_CONSTRUCTED] = { @@ -1467,6 +2584,52 @@ static const struct scic_sds_io_request_state_handler scic_sds_request_state_han .abort_handler = scic_sds_request_started_state_abort_handler, .tc_completion_handler = scic_sds_smp_request_await_tc_completion_tc_completion_handler, }, + [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, + }, + [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, + }, + [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, + }, + [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, + }, [SCI_BASE_REQUEST_STATE_COMPLETED] = { .complete_handler = scic_sds_request_completed_state_complete_handler, }, @@ -2210,15 +3373,6 @@ static void scic_sds_request_constructed_state_enter(void *object) ); } -/** - * scic_sds_request_started_state_enter() - - * @object: This parameter specifies the base object for which the state - * transition is occurring. This is cast into a SCIC_SDS_IO_REQUEST object. - * - * This method implements the actions taken when entering the - * SCI_BASE_REQUEST_STATE_STARTED state. If the io request object type is a - * SCSI Task request we must enter the started substate machine. none - */ static void scic_sds_request_started_state_enter(void *object) { struct scic_sds_request *sci_req = object; @@ -2238,40 +3392,36 @@ static void scic_sds_request_started_state_enter(void *object) SCI_BASE_REQUEST_STATE_STARTED ); - /* Most of the request state machines have a started substate machine so - * start its execution on the entry to the started state. + /* all unaccelerated request types (non ssp or ncq) handled with + * substates */ - if (sci_req->has_started_substate_machine == true) - sci_base_state_machine_start(&sci_req->started_substate_machine); - if (!task && dev->dev_type == SAS_END_DEV) { sci_base_state_machine_change_state(sm, SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION); + } else if (!task && + (isci_request_access_tmf(ireq)->tmf_code == isci_tmf_sata_srst_high || + isci_request_access_tmf(ireq)->tmf_code == isci_tmf_sata_srst_low)) { + sci_base_state_machine_change_state(sm, + SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE); } else if (task && task->task_proto == SAS_PROTOCOL_SMP) { sci_base_state_machine_change_state(sm, SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE); + } else if (task && sas_protocol_ata(task->task_proto) && + !task->ata_task.use_ncq) { + u32 state; + + if (task->data_dir == DMA_NONE) + state = SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE; + else if (task->ata_task.dma_xfer) + state = SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE; + else /* PIO */ + state = SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE; + + sci_base_state_machine_change_state(sm, state); } } /** - * scic_sds_request_started_state_exit() - - * @object: This parameter specifies the base object for which the state - * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST - * object. - * - * This method implements the actions taken when exiting the - * SCI_BASE_REQUEST_STATE_STARTED state. For task requests the action will be - * to stop the started substate machine. none - */ -static void scic_sds_request_started_state_exit(void *object) -{ - struct scic_sds_request *sci_req = object; - - if (sci_req->has_started_substate_machine == true) - sci_base_state_machine_stop(&sci_req->started_substate_machine); -} - -/** * scic_sds_request_completed_state_enter() - * @object: This parameter specifies the base object for which the state * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST @@ -2392,6 +3542,175 @@ static void scic_sds_smp_request_started_await_tc_completion_substate_enter(void ); } +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_request_state_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_request_state_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE + ); +} + + + +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_request_state_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_request_state_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_request_state_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_request_state_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE + ); +} + + + +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_request_state_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_request_state_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE + ); +} + + + +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_request_state_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_request_state_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_request_state_handler_table, + SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE + ); +} + static const struct sci_base_state scic_sds_request_state_table[] = { [SCI_BASE_REQUEST_STATE_INITIAL] = { .enter_state = scic_sds_request_initial_state_enter, @@ -2401,7 +3720,39 @@ static const struct sci_base_state scic_sds_request_state_table[] = { }, [SCI_BASE_REQUEST_STATE_STARTED] = { .enter_state = scic_sds_request_started_state_enter, - .exit_state = scic_sds_request_started_state_exit + }, + [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, + }, + [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, + }, + [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, + }, + [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, }, [SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION] = { .enter_state = scic_sds_io_request_started_task_mgmt_await_tc_completion_substate_enter, @@ -2437,7 +3788,6 @@ static void scic_sds_general_request_construct(struct scic_sds_controller *scic, sci_req->io_tag = io_tag; sci_req->owning_controller = scic; sci_req->target_device = sci_dev; - sci_req->has_started_substate_machine = false; sci_req->protocol = SCIC_NO_PROTOCOL; sci_req->saved_rx_frame_index = SCU_INVALID_FRAME_INDEX; sci_req->device_sequence = scic_sds_remote_device_get_sequence(sci_dev); @@ -3065,6 +4415,3 @@ int isci_request_execute( *isci_request = request; return ret; } - - - diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h index d090cb1a14d..95b65891fc4 100644 --- a/drivers/scsi/isci/request.h +++ b/drivers/scsi/isci/request.h @@ -59,7 +59,6 @@ #include "isci.h" #include "host.h" #include "scu_task_context.h" -#include "stp_request.h" /** * struct isci_request_status - This enum defines the possible states of an I/O @@ -90,6 +89,63 @@ enum sci_request_protocol { SCIC_STP_PROTOCOL }; /* XXX remove me, use sas_task.{dev|task_proto} instead */; +struct scic_sds_stp_request { + union { + u32 ncq; + + u32 udma; + + struct scic_sds_stp_pio_request { + /** + * Total transfer for the entire PIO request recorded at request constuction + * time. + * + * @todo Should we just decrement this value for each byte of data transitted + * or received to elemenate the current_transfer_bytes field? + */ + u32 total_transfer_bytes; + + /** + * Total number of bytes received/transmitted in data frames since the start + * of the IO request. At the end of the IO request this should equal the + * total_transfer_bytes. + */ + u32 current_transfer_bytes; + + /** + * The number of bytes requested in the in the PIO setup. + */ + u32 pio_transfer_bytes; + + /** + * PIO Setup ending status value to tell us if we need to wait for another FIS + * or if the transfer is complete. On the receipt of a D2H FIS this will be + * the status field of that FIS. + */ + u8 ending_status; + + /** + * On receipt of a D2H FIS this will be the ending error field if the + * ending_status has the SATA_STATUS_ERR bit set. + */ + u8 ending_error; + + struct scic_sds_request_pio_sgl { + struct scu_sgl_element_pair *sgl_pair; + u8 sgl_set; + u32 sgl_offset; + } request_current; + } pio; + + struct { + /** + * The number of bytes requested in the PIO setup before CDB data frame. + */ + u32 device_preferred_cdb_length; + } packet; + } type; +}; + struct scic_sds_request { /** * This field contains the information for the base request state machine. @@ -159,12 +215,6 @@ struct scic_sds_request { bool is_task_management_request; /** - * This field indicates that this request contains an initialized started - * substate machine. - */ - bool has_started_substate_machine; - - /** * This field is a pointer to the stored rx frame data. It is used in STP * internal requests and SMP response frames. If this field is non-NULL the * saved frame must be released on IO request completion. @@ -174,12 +224,6 @@ struct scic_sds_request { u32 saved_rx_frame_index; /** - * This field specifies the data necessary to manage the sub-state - * machine executed while in the SCI_BASE_REQUEST_STATE_STARTED state. - */ - struct sci_base_state_machine started_substate_machine; - - /** * This field specifies the current state handlers in place for this * IO Request object. This field is updated each time the request * changes state. @@ -295,6 +339,41 @@ enum sci_base_request_states { */ SCI_BASE_REQUEST_STATE_STARTED, + SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE, + SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE, + + SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE, + SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE, + + SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE, + SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE, + SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE, + + /** + * While in this state the IO request object is waiting for the TC completion + * notification for the H2D Register FIS + */ + SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE, + + /** + * While in this state the IO request object is waiting for either a PIO Setup + * FIS or a D2H register FIS. The type of frame received is based on the + * result of the prior frame and line conditions. + */ + SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE, + + /** + * While in this state the IO request object is waiting for a DATA frame from + * the device. + */ + SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE, + + /** + * While in this state the IO request object is waiting to transmit the next data + * frame to the device. + */ + SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE, + /** * The AWAIT_TC_COMPLETION sub-state indicates that the started raw * task management request is waiting for the transmission of the @@ -383,8 +462,6 @@ struct scic_sds_io_request_state_handler { }; -extern const struct sci_base_state scic_sds_io_request_started_task_mgmt_substate_table[]; - /** * scic_sds_request_get_controller() - * @@ -473,7 +550,6 @@ scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completi (scu_sge).address_modifier = 0; \ } -void scic_sds_request_build_sgl(struct scic_sds_request *sci_req); enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req); enum sci_status scic_sds_io_request_terminate(struct scic_sds_request *sci_req); enum sci_status scic_sds_io_request_event_handler(struct scic_sds_request *sci_req, @@ -481,8 +557,6 @@ enum sci_status scic_sds_io_request_event_handler(struct scic_sds_request *sci_r enum sci_status scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req, u32 frame_index); enum sci_status scic_sds_task_request_terminate(struct scic_sds_request *sci_req); -enum sci_status scic_sds_request_started_state_abort_handler(struct scic_sds_request *sci_req); - /* XXX open code in caller */ static inline void *scic_request_get_virt_addr(struct scic_sds_request *sci_req, @@ -778,6 +852,9 @@ enum sci_status scic_task_request_construct(struct scic_sds_controller *scic, struct scic_sds_request *sci_req); enum sci_status scic_task_request_construct_ssp(struct scic_sds_request *sci_req); enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req); +enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req, + u32 transfer_length, + enum dma_data_direction dir); void scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag); void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req); #endif /* !defined(_ISCI_REQUEST_H_) */ diff --git a/drivers/scsi/isci/stp_request.c b/drivers/scsi/isci/stp_request.c deleted file mode 100644 index e94ece81ed9..00000000000 --- a/drivers/scsi/isci/stp_request.c +++ /dev/null @@ -1,1584 +0,0 @@ -/* - * This file is provided under a dual BSD/GPLv2 license. When using or - * redistributing this file, you may do so under either license. - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * BSD LICENSE - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <scsi/sas.h> -#include "sas.h" -#include "state_machine.h" -#include "remote_device.h" -#include "stp_request.h" -#include "unsolicited_frame_control.h" -#include "scu_completion_codes.h" -#include "scu_event_codes.h" -#include "scu_task_context.h" -#include "request.h" - -/** - * This method is will fill in the SCU Task Context for any type of SATA - * request. This is called from the various SATA constructors. - * @sci_req: The general IO request object which is to be used in - * constructing the SCU task context. - * @task_context: The buffer pointer for the SCU task context which is being - * constructed. - * - * The general io request construction is complete. The buffer assignment for - * the command buffer is complete. none Revisit task context construction to - * determine what is common for SSP/SMP/STP task context structures. - */ -static void scu_sata_reqeust_construct_task_context( - struct scic_sds_request *sci_req, - struct scu_task_context *task_context) -{ - dma_addr_t dma_addr; - struct scic_sds_controller *controller; - struct scic_sds_remote_device *target_device; - struct scic_sds_port *target_port; - - controller = scic_sds_request_get_controller(sci_req); - target_device = scic_sds_request_get_device(sci_req); - target_port = scic_sds_request_get_port(sci_req); - - /* Fill in the TC with the its required data */ - task_context->abort = 0; - task_context->priority = SCU_TASK_PRIORITY_NORMAL; - task_context->initiator_request = 1; - task_context->connection_rate = target_device->connection_rate; - task_context->protocol_engine_index = - scic_sds_controller_get_protocol_engine_group(controller); - task_context->logical_port_index = - scic_sds_port_get_index(target_port); - task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_STP; - task_context->valid = SCU_TASK_CONTEXT_VALID; - task_context->context_type = SCU_TASK_CONTEXT_TYPE; - - task_context->remote_node_index = - scic_sds_remote_device_get_index(sci_req->target_device); - task_context->command_code = 0; - - task_context->link_layer_control = 0; - task_context->do_not_dma_ssp_good_response = 1; - task_context->strict_ordering = 0; - task_context->control_frame = 0; - task_context->timeout_enable = 0; - task_context->block_guard_enable = 0; - - task_context->address_modifier = 0; - task_context->task_phase = 0x01; - - task_context->ssp_command_iu_length = - (sizeof(struct host_to_dev_fis) - sizeof(u32)) / sizeof(u32); - - /* Set the first word of the H2D REG FIS */ - task_context->type.words[0] = *(u32 *)&sci_req->stp.cmd; - - if (sci_req->was_tag_assigned_by_user) { - /* - * Build the task context now since we have already read - * the data - */ - sci_req->post_context = - (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | - (scic_sds_controller_get_protocol_engine_group( - controller) << - SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | - (scic_sds_port_get_index(target_port) << - SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | - scic_sds_io_tag_get_index(sci_req->io_tag)); - } else { - /* - * Build the task context now since we have already read - * the data. - * I/O tag index is not assigned because we have to wait - * until we get a TCi. - */ - sci_req->post_context = - (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | - (scic_sds_controller_get_protocol_engine_group( - controller) << - SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | - (scic_sds_port_get_index(target_port) << - SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT)); - } - - /* - * Copy the physical address for the command buffer to the SCU Task - * Context. We must offset the command buffer by 4 bytes because the - * first 4 bytes are transfered in the body of the TC. - */ - dma_addr = scic_io_request_get_dma_addr(sci_req, - ((char *) &sci_req->stp.cmd) + - sizeof(u32)); - - task_context->command_iu_upper = upper_32_bits(dma_addr); - task_context->command_iu_lower = lower_32_bits(dma_addr); - - /* SATA Requests do not have a response buffer */ - task_context->response_iu_upper = 0; - task_context->response_iu_lower = 0; -} - -/** - * - * @sci_req: - * - * This method will perform any general sata request construction. What part of - * SATA IO request construction is general? none - */ -static void scic_sds_stp_non_ncq_request_construct( - struct scic_sds_request *sci_req) -{ - sci_req->has_started_substate_machine = true; -} - -/** - * - * @sci_req: This parameter specifies the request to be constructed as an - * optimized request. - * @optimized_task_type: This parameter specifies whether the request is to be - * an UDMA request or a NCQ request. - A value of 0 indicates UDMA. - A - * value of 1 indicates NCQ. - * - * This method will perform request construction common to all types of STP - * requests that are optimized by the silicon (i.e. UDMA, NCQ). This method - * returns an indication as to whether the construction was successful. - */ -static void scic_sds_stp_optimized_request_construct(struct scic_sds_request *sci_req, - u8 optimized_task_type, - u32 len, - enum dma_data_direction dir) -{ - struct scu_task_context *task_context = sci_req->task_context_buffer; - - /* Build the STP task context structure */ - scu_sata_reqeust_construct_task_context(sci_req, task_context); - - /* Copy over the SGL elements */ - scic_sds_request_build_sgl(sci_req); - - /* Copy over the number of bytes to be transfered */ - task_context->transfer_length_bytes = len; - - if (dir == DMA_TO_DEVICE) { - /* - * The difference between the DMA IN and DMA OUT request task type - * values are consistent with the difference between FPDMA READ - * and FPDMA WRITE values. Add the supplied task type parameter - * to this difference to set the task type properly for this - * DATA OUT (WRITE) case. */ - task_context->task_type = optimized_task_type + (SCU_TASK_TYPE_DMA_OUT - - SCU_TASK_TYPE_DMA_IN); - } else { - /* - * For the DATA IN (READ) case, simply save the supplied - * optimized task type. */ - task_context->task_type = optimized_task_type; - } -} - -/** - * - * @sci_req: This parameter specifies the request to be constructed. - * - * This method will construct the STP UDMA request and its associated TC data. - * This method returns an indication as to whether the construction was - * successful. SCI_SUCCESS Currently this method always returns this value. - */ -enum sci_status scic_sds_stp_ncq_request_construct(struct scic_sds_request *sci_req, - u32 len, - enum dma_data_direction dir) -{ - scic_sds_stp_optimized_request_construct(sci_req, - SCU_TASK_TYPE_FPDMAQ_READ, - len, dir); - return SCI_SUCCESS; -} - -/** - * scu_stp_raw_request_construct_task_context - - * @sci_req: This parameter specifies the STP request object for which to - * construct a RAW command frame task context. - * @task_context: This parameter specifies the SCU specific task context buffer - * to construct. - * - * This method performs the operations common to all SATA/STP requests - * utilizing the raw frame method. none - */ -static void scu_stp_raw_request_construct_task_context( - struct scic_sds_stp_request *stp_req, - struct scu_task_context *task_context) -{ - struct scic_sds_request *sci_req = to_sci_req(stp_req); - - scu_sata_reqeust_construct_task_context(sci_req, task_context); - - task_context->control_frame = 0; - task_context->priority = SCU_TASK_PRIORITY_NORMAL; - task_context->task_type = SCU_TASK_TYPE_SATA_RAW_FRAME; - task_context->type.stp.fis_type = FIS_REGH2D; - task_context->transfer_length_bytes = sizeof(struct host_to_dev_fis) - sizeof(u32); -} - -void scic_stp_io_request_set_ncq_tag( - struct scic_sds_request *req, - u16 ncq_tag) -{ - /** - * @note This could be made to return an error to the user if the user - * attempts to set the NCQ tag in the wrong state. - */ - req->task_context_buffer->type.stp.ncq_tag = ncq_tag; -} - -/** - * - * @sci_req: - * - * Get the next SGL element from the request. - Check on which SGL element pair - * we are working - if working on SLG pair element A - advance to element B - - * else - check to see if there are more SGL element pairs for this IO request - * - if there are more SGL element pairs - advance to the next pair and return - * element A struct scu_sgl_element* - */ -static struct scu_sgl_element *scic_sds_stp_request_pio_get_next_sgl(struct scic_sds_stp_request *stp_req) -{ - struct scu_sgl_element *current_sgl; - struct scic_sds_request *sci_req = to_sci_req(stp_req); - struct scic_sds_request_pio_sgl *pio_sgl = &stp_req->type.pio.request_current; - - if (pio_sgl->sgl_set == SCU_SGL_ELEMENT_PAIR_A) { - if (pio_sgl->sgl_pair->B.address_lower == 0 && - pio_sgl->sgl_pair->B.address_upper == 0) { - current_sgl = NULL; - } else { - pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_B; - current_sgl = &pio_sgl->sgl_pair->B; - } - } else { - if (pio_sgl->sgl_pair->next_pair_lower == 0 && - pio_sgl->sgl_pair->next_pair_upper == 0) { - current_sgl = NULL; - } else { - u64 phys_addr; - - phys_addr = pio_sgl->sgl_pair->next_pair_upper; - phys_addr <<= 32; - phys_addr |= pio_sgl->sgl_pair->next_pair_lower; - - pio_sgl->sgl_pair = scic_request_get_virt_addr(sci_req, phys_addr); - pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_A; - current_sgl = &pio_sgl->sgl_pair->A; - } - } - - return current_sgl; -} - -/** - * - * @sci_req: - * @completion_code: - * - * This method processes a TC completion. The expected TC completion is for - * the transmission of the H2D register FIS containing the SATA/STP non-data - * request. This method always successfully processes the TC completion. - * SCI_SUCCESS This value is always returned. - */ -static enum sci_status scic_sds_stp_request_non_data_await_h2d_tc_completion_handler( - struct scic_sds_request *sci_req, - u32 completion_code) -{ - switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): - scic_sds_request_set_status( - sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS - ); - - sci_base_state_machine_change_state( - &sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE - ); - break; - - default: - /* - * All other completion status cause the IO to be complete. If a NAK - * was received, then it is up to the user to retry the request. */ - scic_sds_request_set_status( - sci_req, - SCU_NORMALIZE_COMPLETION_STATUS(completion_code), - SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR - ); - - sci_base_state_machine_change_state( - &sci_req->state_machine, SCI_BASE_REQUEST_STATE_COMPLETED); - break; - } - - return SCI_SUCCESS; -} - -/** - * - * @request: This parameter specifies the request for which a frame has been - * received. - * @frame_index: This parameter specifies the index of the frame that has been - * received. - * - * This method processes frames received from the target while waiting for a - * device to host register FIS. If a non-register FIS is received during this - * time, it is treated as a protocol violation from an IO perspective. Indicate - * if the received frame was processed successfully. - */ -static enum sci_status scic_sds_stp_request_non_data_await_d2h_frame_handler( - struct scic_sds_request *sci_req, - u32 frame_index) -{ - enum sci_status status; - struct dev_to_host_fis *frame_header; - u32 *frame_buffer; - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - struct scic_sds_controller *scic = sci_req->owning_controller; - - status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control, - frame_index, - (void **)&frame_header); - - if (status != SCI_SUCCESS) { - dev_err(scic_to_dev(sci_req->owning_controller), - "%s: SCIC IO Request 0x%p could not get frame header " - "for frame index %d, status %x\n", - __func__, stp_req, frame_index, status); - - return status; - } - - switch (frame_header->fis_type) { - case FIS_REGD2H: - scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control, - frame_index, - (void **)&frame_buffer); - - scic_sds_controller_copy_sata_response(&sci_req->stp.rsp, - frame_header, - frame_buffer); - - /* The command has completed with error */ - scic_sds_request_set_status(sci_req, SCU_TASK_DONE_CHECK_RESPONSE, - SCI_FAILURE_IO_RESPONSE_VALID); - break; - - default: - dev_warn(scic_to_dev(scic), - "%s: IO Request:0x%p Frame Id:%d protocol " - "violation occurred\n", __func__, stp_req, - frame_index); - - scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS, - SCI_FAILURE_PROTOCOL_VIOLATION); - break; - } - - sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); - - /* Frame has been decoded return it to the controller */ - scic_sds_controller_release_frame(scic, frame_index); - - return status; -} - -/* --------------------------------------------------------------------------- */ - -static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_non_data_substate_handler_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .tc_completion_handler = scic_sds_stp_request_non_data_await_h2d_tc_completion_handler, - }, - [SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .frame_handler = scic_sds_stp_request_non_data_await_d2h_frame_handler, - } -}; - -static void scic_sds_stp_request_started_non_data_await_h2d_completion_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_non_data_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE - ); - - scic_sds_remote_device_set_working_request( - sci_req->target_device, sci_req - ); -} - -static void scic_sds_stp_request_started_non_data_await_d2h_enter(void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_non_data_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE - ); -} - -/* --------------------------------------------------------------------------- */ - -static const struct sci_base_state scic_sds_stp_request_started_non_data_substate_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_non_data_await_h2d_completion_enter, - }, - [SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_non_data_await_d2h_enter, - }, -}; - -enum sci_status scic_sds_stp_non_data_request_construct(struct scic_sds_request *sci_req) -{ - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - - scic_sds_stp_non_ncq_request_construct(sci_req); - - /* Build the STP task context structure */ - scu_stp_raw_request_construct_task_context(stp_req, sci_req->task_context_buffer); - - sci_base_state_machine_construct(&sci_req->started_substate_machine, - sci_req, - scic_sds_stp_request_started_non_data_substate_table, - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE); - - return SCI_SUCCESS; -} - -#define SCU_MAX_FRAME_BUFFER_SIZE 0x400 /* 1K is the maximum SCU frame data payload */ - -/* transmit DATA_FIS from (current sgl + offset) for input - * parameter length. current sgl and offset is alreay stored in the IO request - */ -static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame( - struct scic_sds_request *sci_req, - u32 length) -{ - struct scic_sds_controller *scic = sci_req->owning_controller; - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - struct scu_task_context *task_context; - struct scu_sgl_element *current_sgl; - - /* Recycle the TC and reconstruct it for sending out DATA FIS containing - * for the data from current_sgl+offset for the input length - */ - task_context = scic_sds_controller_get_task_context_buffer(scic, - sci_req->io_tag); - - if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) - current_sgl = &stp_req->type.pio.request_current.sgl_pair->A; - else - current_sgl = &stp_req->type.pio.request_current.sgl_pair->B; - - /* update the TC */ - task_context->command_iu_upper = current_sgl->address_upper; - task_context->command_iu_lower = current_sgl->address_lower; - task_context->transfer_length_bytes = length; - task_context->type.stp.fis_type = FIS_DATA; - - /* send the new TC out. */ - return scic_controller_continue_io(sci_req); -} - -static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data(struct scic_sds_request *sci_req) -{ - - struct scu_sgl_element *current_sgl; - u32 sgl_offset; - u32 remaining_bytes_in_current_sgl = 0; - enum sci_status status = SCI_SUCCESS; - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - - sgl_offset = stp_req->type.pio.request_current.sgl_offset; - - if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) { - current_sgl = &(stp_req->type.pio.request_current.sgl_pair->A); - remaining_bytes_in_current_sgl = stp_req->type.pio.request_current.sgl_pair->A.length - sgl_offset; - } else { - current_sgl = &(stp_req->type.pio.request_current.sgl_pair->B); - remaining_bytes_in_current_sgl = stp_req->type.pio.request_current.sgl_pair->B.length - sgl_offset; - } - - - if (stp_req->type.pio.pio_transfer_bytes > 0) { - if (stp_req->type.pio.pio_transfer_bytes >= remaining_bytes_in_current_sgl) { - /* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = remaining_bytes_in_current_sgl */ - status = scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, remaining_bytes_in_current_sgl); - if (status == SCI_SUCCESS) { - stp_req->type.pio.pio_transfer_bytes -= remaining_bytes_in_current_sgl; - - /* update the current sgl, sgl_offset and save for future */ - current_sgl = scic_sds_stp_request_pio_get_next_sgl(stp_req); - sgl_offset = 0; - } - } else if (stp_req->type.pio.pio_transfer_bytes < remaining_bytes_in_current_sgl) { - /* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = type.pio.pio_transfer_bytes */ - scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, stp_req->type.pio.pio_transfer_bytes); - - if (status == SCI_SUCCESS) { - /* Sgl offset will be adjusted and saved for future */ - sgl_offset += stp_req->type.pio.pio_transfer_bytes; - current_sgl->address_lower += stp_req->type.pio.pio_transfer_bytes; - stp_req->type.pio.pio_transfer_bytes = 0; - } - } - } - - if (status == SCI_SUCCESS) { - stp_req->type.pio.request_current.sgl_offset = sgl_offset; - } - - return status; -} - -/** - * - * @stp_request: The request that is used for the SGL processing. - * @data_buffer: The buffer of data to be copied. - * @length: The length of the data transfer. - * - * Copy the data from the buffer for the length specified to the IO reqeust SGL - * specified data region. enum sci_status - */ -static enum sci_status -scic_sds_stp_request_pio_data_in_copy_data_buffer(struct scic_sds_stp_request *stp_req, - u8 *data_buf, u32 len) -{ - struct scic_sds_request *sci_req; - struct isci_request *ireq; - u8 *src_addr; - int copy_len; - struct sas_task *task; - struct scatterlist *sg; - void *kaddr; - int total_len = len; - - sci_req = to_sci_req(stp_req); - ireq = sci_req_to_ireq(sci_req); - task = isci_request_access_task(ireq); - src_addr = data_buf; - - if (task->num_scatter > 0) { - sg = task->scatter; - - while (total_len > 0) { - struct page *page = sg_page(sg); - - copy_len = min_t(int, total_len, sg_dma_len(sg)); - kaddr = kmap_atomic(page, KM_IRQ0); - memcpy(kaddr + sg->offset, src_addr, copy_len); - kunmap_atomic(kaddr, KM_IRQ0); - total_len -= copy_len; - src_addr += copy_len; - sg = sg_next(sg); - } - } else { - BUG_ON(task->total_xfer_len < total_len); - memcpy(task->scatter, src_addr, total_len); - } - - return SCI_SUCCESS; -} - -/** - * - * @sci_req: The PIO DATA IN request that is to receive the data. - * @data_buffer: The buffer to copy from. - * - * Copy the data buffer to the io request data region. enum sci_status - */ -static enum sci_status scic_sds_stp_request_pio_data_in_copy_data( - struct scic_sds_stp_request *sci_req, - u8 *data_buffer) -{ - enum sci_status status; - - /* - * If there is less than 1K remaining in the transfer request - * copy just the data for the transfer */ - if (sci_req->type.pio.pio_transfer_bytes < SCU_MAX_FRAME_BUFFER_SIZE) { - status = scic_sds_stp_request_pio_data_in_copy_data_buffer( - sci_req, data_buffer, sci_req->type.pio.pio_transfer_bytes); - - if (status == SCI_SUCCESS) - sci_req->type.pio.pio_transfer_bytes = 0; - } else { - /* We are transfering the whole frame so copy */ - status = scic_sds_stp_request_pio_data_in_copy_data_buffer( - sci_req, data_buffer, SCU_MAX_FRAME_BUFFER_SIZE); - - if (status == SCI_SUCCESS) - sci_req->type.pio.pio_transfer_bytes -= SCU_MAX_FRAME_BUFFER_SIZE; - } - - return status; -} - -/** - * - * @sci_req: - * @completion_code: - * - * enum sci_status - */ -static enum sci_status scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler( - struct scic_sds_request *sci_req, - u32 completion_code) -{ - enum sci_status status = SCI_SUCCESS; - - switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): - scic_sds_request_set_status( - sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS - ); - - sci_base_state_machine_change_state( - &sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE - ); - break; - - default: - /* - * All other completion status cause the IO to be complete. If a NAK - * was received, then it is up to the user to retry the request. */ - scic_sds_request_set_status( - sci_req, - SCU_NORMALIZE_COMPLETION_STATUS(completion_code), - SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR - ); - - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED - ); - break; - } - - return status; -} - -static enum sci_status scic_sds_stp_request_pio_await_frame_frame_handler(struct scic_sds_request *sci_req, - u32 frame_index) -{ - struct scic_sds_controller *scic = sci_req->owning_controller; - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - struct isci_request *ireq = sci_req_to_ireq(sci_req); - struct sas_task *task = isci_request_access_task(ireq); - struct dev_to_host_fis *frame_header; - enum sci_status status; - u32 *frame_buffer; - - status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control, - frame_index, - (void **)&frame_header); - - if (status != SCI_SUCCESS) { - dev_err(scic_to_dev(scic), - "%s: SCIC IO Request 0x%p could not get frame header " - "for frame index %d, status %x\n", - __func__, stp_req, frame_index, status); - return status; - } - - switch (frame_header->fis_type) { - case FIS_PIO_SETUP: - /* Get from the frame buffer the PIO Setup Data */ - scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control, - frame_index, - (void **)&frame_buffer); - - /* Get the data from the PIO Setup The SCU Hardware returns - * first word in the frame_header and the rest of the data is in - * the frame buffer so we need to back up one dword - */ - - /* transfer_count: first 16bits in the 4th dword */ - stp_req->type.pio.pio_transfer_bytes = frame_buffer[3] & 0xffff; - - /* ending_status: 4th byte in the 3rd dword */ - stp_req->type.pio.ending_status = (frame_buffer[2] >> 24) & 0xff; - - scic_sds_controller_copy_sata_response(&sci_req->stp.rsp, - frame_header, - frame_buffer); - - sci_req->stp.rsp.status = stp_req->type.pio.ending_status; - - /* The next state is dependent on whether the - * request was PIO Data-in or Data out - */ - if (task->data_dir == DMA_FROM_DEVICE) { - sci_base_state_machine_change_state(&sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE); - } else if (task->data_dir == DMA_TO_DEVICE) { - /* Transmit data */ - status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req); - if (status != SCI_SUCCESS) - break; - sci_base_state_machine_change_state(&sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE); - } - break; - case FIS_SETDEVBITS: - sci_base_state_machine_change_state(&sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE); - break; - case FIS_REGD2H: - if (frame_header->status & ATA_BUSY) { - /* Now why is the drive sending a D2H Register FIS when - * it is still busy? Do nothing since we are still in - * the right state. - */ - dev_dbg(scic_to_dev(scic), - "%s: SCIC PIO Request 0x%p received " - "D2H Register FIS with BSY status " - "0x%x\n", __func__, stp_req, - frame_header->status); - break; - } - - scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control, - frame_index, - (void **)&frame_buffer); - - scic_sds_controller_copy_sata_response(&sci_req->stp.req, - frame_header, - frame_buffer); - - scic_sds_request_set_status(sci_req, - SCU_TASK_DONE_CHECK_RESPONSE, - SCI_FAILURE_IO_RESPONSE_VALID); - - sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); - break; - default: - /* FIXME: what do we do here? */ - break; - } - - /* Frame is decoded return it to the controller */ - scic_sds_controller_release_frame(scic, frame_index); - - return status; -} - -static enum sci_status scic_sds_stp_request_pio_data_in_await_data_frame_handler(struct scic_sds_request *sci_req, - u32 frame_index) -{ - enum sci_status status; - struct dev_to_host_fis *frame_header; - struct sata_fis_data *frame_buffer; - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - struct scic_sds_controller *scic = sci_req->owning_controller; - - status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control, - frame_index, - (void **)&frame_header); - - if (status != SCI_SUCCESS) { - dev_err(scic_to_dev(scic), - "%s: SCIC IO Request 0x%p could not get frame header " - "for frame index %d, status %x\n", - __func__, stp_req, frame_index, status); - return status; - } - - if (frame_header->fis_type == FIS_DATA) { - if (stp_req->type.pio.request_current.sgl_pair == NULL) { - sci_req->saved_rx_frame_index = frame_index; - stp_req->type.pio.pio_transfer_bytes = 0; - } else { - scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control, - frame_index, - (void **)&frame_buffer); - - status = scic_sds_stp_request_pio_data_in_copy_data(stp_req, - (u8 *)frame_buffer); - - /* Frame is decoded return it to the controller */ - scic_sds_controller_release_frame(scic, frame_index); - } - - /* Check for the end of the transfer, are there more - * bytes remaining for this data transfer - */ - if (status != SCI_SUCCESS || - stp_req->type.pio.pio_transfer_bytes != 0) - return status; - - if ((stp_req->type.pio.ending_status & ATA_BUSY) == 0) { - scic_sds_request_set_status(sci_req, - SCU_TASK_DONE_CHECK_RESPONSE, - SCI_FAILURE_IO_RESPONSE_VALID); - - sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); - } else { - sci_base_state_machine_change_state(&sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE); - } - } else { - dev_err(scic_to_dev(scic), - "%s: SCIC PIO Request 0x%p received frame %d " - "with fis type 0x%02x when expecting a data " - "fis.\n", __func__, stp_req, frame_index, - frame_header->fis_type); - - scic_sds_request_set_status(sci_req, - SCU_TASK_DONE_GOOD, - SCI_FAILURE_IO_REQUIRES_SCSI_ABORT); - - sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); - - /* Frame is decoded return it to the controller */ - scic_sds_controller_release_frame(scic, frame_index); - } - - return status; -} - - -/** - * - * @sci_req: - * @completion_code: - * - * enum sci_status - */ -static enum sci_status scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler( - - struct scic_sds_request *sci_req, - u32 completion_code) -{ - enum sci_status status = SCI_SUCCESS; - bool all_frames_transferred = false; - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - - switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): - /* Transmit data */ - if (stp_req->type.pio.pio_transfer_bytes != 0) { - status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req); - if (status == SCI_SUCCESS) { - if (stp_req->type.pio.pio_transfer_bytes == 0) - all_frames_transferred = true; - } - } else if (stp_req->type.pio.pio_transfer_bytes == 0) { - /* - * this will happen if the all data is written at the - * first time after the pio setup fis is received - */ - all_frames_transferred = true; - } - - /* all data transferred. */ - if (all_frames_transferred) { - /* - * Change the state to SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_FRAME_SUBSTATE - * and wait for PIO_SETUP fis / or D2H REg fis. */ - sci_base_state_machine_change_state( - &sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE - ); - } - break; - - default: - /* - * All other completion status cause the IO to be complete. If a NAK - * was received, then it is up to the user to retry the request. */ - scic_sds_request_set_status( - sci_req, - SCU_NORMALIZE_COMPLETION_STATUS(completion_code), - SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR - ); - - sci_base_state_machine_change_state( - &sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED - ); - break; - } - - return status; -} - -/** - * - * @request: This is the request which is receiving the event. - * @event_code: This is the event code that the request on which the request is - * expected to take action. - * - * This method will handle any link layer events while waiting for the data - * frame. enum sci_status SCI_SUCCESS SCI_FAILURE - */ -static enum sci_status scic_sds_stp_request_pio_data_in_await_data_event_handler( - struct scic_sds_request *request, - u32 event_code) -{ - enum sci_status status; - - switch (scu_get_event_specifier(event_code)) { - case SCU_TASK_DONE_CRC_ERR << SCU_EVENT_SPECIFIC_CODE_SHIFT: - /* - * We are waiting for data and the SCU has R_ERR the data frame. - * Go back to waiting for the D2H Register FIS */ - sci_base_state_machine_change_state( - &request->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE - ); - - status = SCI_SUCCESS; - break; - - default: - dev_err(scic_to_dev(request->owning_controller), - "%s: SCIC PIO Request 0x%p received unexpected " - "event 0x%08x\n", - __func__, request, event_code); - - /* / @todo Should we fail the PIO request when we get an unexpected event? */ - status = SCI_FAILURE; - break; - } - - return status; -} - -/* --------------------------------------------------------------------------- */ - -static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_pio_substate_handler_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .tc_completion_handler = scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler, - }, - [SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .frame_handler = scic_sds_stp_request_pio_await_frame_frame_handler - }, - [SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .event_handler = scic_sds_stp_request_pio_data_in_await_data_event_handler, - .frame_handler = scic_sds_stp_request_pio_data_in_await_data_frame_handler - }, - [SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .tc_completion_handler = scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler, - } -}; - -static void scic_sds_stp_request_started_pio_await_h2d_completion_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_pio_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE - ); - - scic_sds_remote_device_set_working_request( - sci_req->target_device, sci_req); -} - -static void scic_sds_stp_request_started_pio_await_frame_enter(void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_pio_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE - ); -} - -static void scic_sds_stp_request_started_pio_data_in_await_data_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_pio_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE - ); -} - -static void scic_sds_stp_request_started_pio_data_out_transmit_data_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_pio_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE - ); -} - -/* --------------------------------------------------------------------------- */ - -static const struct sci_base_state scic_sds_stp_request_started_pio_substate_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_pio_await_h2d_completion_enter, - }, - [SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_pio_await_frame_enter, - }, - [SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_pio_data_in_await_data_enter, - }, - [SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_pio_data_out_transmit_data_enter, - } -}; - -enum sci_status -scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req, - bool copy_rx_frame) -{ - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - struct scic_sds_stp_pio_request *pio = &stp_req->type.pio; - - scic_sds_stp_non_ncq_request_construct(sci_req); - - scu_stp_raw_request_construct_task_context(stp_req, - sci_req->task_context_buffer); - - pio->current_transfer_bytes = 0; - pio->ending_error = 0; - pio->ending_status = 0; - - pio->request_current.sgl_offset = 0; - pio->request_current.sgl_set = SCU_SGL_ELEMENT_PAIR_A; - - if (copy_rx_frame) { - scic_sds_request_build_sgl(sci_req); - /* Since the IO request copy of the TC contains the same data as - * the actual TC this pointer is vaild for either. - */ - pio->request_current.sgl_pair = &sci_req->task_context_buffer->sgl_pair_ab; - } else { - /* The user does not want the data copied to the SGL buffer location */ - pio->request_current.sgl_pair = NULL; - } - - sci_base_state_machine_construct(&sci_req->started_substate_machine, - sci_req, - scic_sds_stp_request_started_pio_substate_table, - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE); - - return SCI_SUCCESS; -} - -static void scic_sds_stp_request_udma_complete_request( - struct scic_sds_request *request, - u32 scu_status, - enum sci_status sci_status) -{ - scic_sds_request_set_status(request, scu_status, sci_status); - sci_base_state_machine_change_state(&request->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); -} - -static enum sci_status scic_sds_stp_request_udma_general_frame_handler(struct scic_sds_request *sci_req, - u32 frame_index) -{ - struct scic_sds_controller *scic = sci_req->owning_controller; - struct dev_to_host_fis *frame_header; - enum sci_status status; - u32 *frame_buffer; - - status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control, - frame_index, - (void **)&frame_header); - - if ((status == SCI_SUCCESS) && - (frame_header->fis_type == FIS_REGD2H)) { - scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control, - frame_index, - (void **)&frame_buffer); - - scic_sds_controller_copy_sata_response(&sci_req->stp.rsp, - frame_header, - frame_buffer); - } - - scic_sds_controller_release_frame(scic, frame_index); - - return status; -} - -static enum sci_status scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler( - struct scic_sds_request *sci_req, - u32 completion_code) -{ - enum sci_status status = SCI_SUCCESS; - - switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): - scic_sds_stp_request_udma_complete_request(sci_req, - SCU_TASK_DONE_GOOD, - SCI_SUCCESS); - break; - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_FIS): - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR): - /* - * We must check ther response buffer to see if the D2H Register FIS was - * received before we got the TC completion. */ - if (sci_req->stp.rsp.fis_type == FIS_REGD2H) { - scic_sds_remote_device_suspend(sci_req->target_device, - SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code))); - - scic_sds_stp_request_udma_complete_request(sci_req, - SCU_TASK_DONE_CHECK_RESPONSE, - SCI_FAILURE_IO_RESPONSE_VALID); - } else { - /* - * If we have an error completion status for the TC then we can expect a - * D2H register FIS from the device so we must change state to wait for it */ - sci_base_state_machine_change_state(&sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE); - } - break; - - /* - * / @todo Check to see if any of these completion status need to wait for - * / the device to host register fis. */ - /* / @todo We can retry the command for SCU_TASK_DONE_CMD_LL_R_ERR - this comes only for B0 */ - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_INV_FIS_LEN): - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR): - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_R_ERR): - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CMD_LL_R_ERR): - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CRC_ERR): - scic_sds_remote_device_suspend(sci_req->target_device, - SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code))); - /* Fall through to the default case */ - default: - /* All other completion status cause the IO to be complete. */ - scic_sds_stp_request_udma_complete_request(sci_req, - SCU_NORMALIZE_COMPLETION_STATUS(completion_code), - SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); - break; - } - - return status; -} - -static enum sci_status scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler( - struct scic_sds_request *sci_req, - u32 frame_index) -{ - enum sci_status status; - - /* Use the general frame handler to copy the resposne data */ - status = scic_sds_stp_request_udma_general_frame_handler(sci_req, frame_index); - - if (status != SCI_SUCCESS) - return status; - - scic_sds_stp_request_udma_complete_request(sci_req, - SCU_TASK_DONE_CHECK_RESPONSE, - SCI_FAILURE_IO_RESPONSE_VALID); - - return status; -} - -/* --------------------------------------------------------------------------- */ - -static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_udma_substate_handler_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .tc_completion_handler = scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler, - .frame_handler = scic_sds_stp_request_udma_general_frame_handler, - }, - [SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .frame_handler = scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler, - }, -}; - -static void scic_sds_stp_request_started_udma_await_tc_completion_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_udma_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE - ); -} - -/** - * - * - * This state is entered when there is an TC completion failure. The hardware - * received an unexpected condition while processing the IO request and now - * will UF the D2H register FIS to complete the IO. - */ -static void scic_sds_stp_request_started_udma_await_d2h_reg_fis_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_udma_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE - ); -} - -/* --------------------------------------------------------------------------- */ - -static const struct sci_base_state scic_sds_stp_request_started_udma_substate_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_udma_await_tc_completion_enter, - }, - [SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_udma_await_d2h_reg_fis_enter, - }, -}; - -enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req, - u32 len, - enum dma_data_direction dir) -{ - scic_sds_stp_non_ncq_request_construct(sci_req); - - scic_sds_stp_optimized_request_construct(sci_req, SCU_TASK_TYPE_DMA_IN, - len, dir); - - sci_base_state_machine_construct( - &sci_req->started_substate_machine, - sci_req, - scic_sds_stp_request_started_udma_substate_table, - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE - ); - - return SCI_SUCCESS; -} - -/** - * - * @sci_req: - * @completion_code: - * - * This method processes a TC completion. The expected TC completion is for - * the transmission of the H2D register FIS containing the SATA/STP non-data - * request. This method always successfully processes the TC completion. - * SCI_SUCCESS This value is always returned. - */ -static enum sci_status scic_sds_stp_request_soft_reset_await_h2d_asserted_tc_completion_handler( - struct scic_sds_request *sci_req, - u32 completion_code) -{ - switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): - scic_sds_request_set_status( - sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS - ); - - sci_base_state_machine_change_state( - &sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE - ); - break; - - default: - /* - * All other completion status cause the IO to be complete. If a NAK - * was received, then it is up to the user to retry the request. */ - scic_sds_request_set_status( - sci_req, - SCU_NORMALIZE_COMPLETION_STATUS(completion_code), - SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR - ); - - sci_base_state_machine_change_state( - &sci_req->state_machine, SCI_BASE_REQUEST_STATE_COMPLETED); - break; - } - - return SCI_SUCCESS; -} - -/** - * - * @sci_req: - * @completion_code: - * - * This method processes a TC completion. The expected TC completion is for - * the transmission of the H2D register FIS containing the SATA/STP non-data - * request. This method always successfully processes the TC completion. - * SCI_SUCCESS This value is always returned. - */ -static enum sci_status scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_completion_handler( - struct scic_sds_request *sci_req, - u32 completion_code) -{ - switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { - case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): - scic_sds_request_set_status( - sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS - ); - - sci_base_state_machine_change_state( - &sci_req->started_substate_machine, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE - ); - break; - - default: - /* - * All other completion status cause the IO to be complete. If a NAK - * was received, then it is up to the user to retry the request. */ - scic_sds_request_set_status( - sci_req, - SCU_NORMALIZE_COMPLETION_STATUS(completion_code), - SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR - ); - - sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); - break; - } - - return SCI_SUCCESS; -} - -/** - * - * @request: This parameter specifies the request for which a frame has been - * received. - * @frame_index: This parameter specifies the index of the frame that has been - * received. - * - * This method processes frames received from the target while waiting for a - * device to host register FIS. If a non-register FIS is received during this - * time, it is treated as a protocol violation from an IO perspective. Indicate - * if the received frame was processed successfully. - */ -static enum sci_status scic_sds_stp_request_soft_reset_await_d2h_frame_handler( - struct scic_sds_request *sci_req, - u32 frame_index) -{ - enum sci_status status; - struct dev_to_host_fis *frame_header; - u32 *frame_buffer; - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - struct scic_sds_controller *scic = sci_req->owning_controller; - - status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control, - frame_index, - (void **)&frame_header); - if (status != SCI_SUCCESS) { - dev_err(scic_to_dev(scic), - "%s: SCIC IO Request 0x%p could not get frame header " - "for frame index %d, status %x\n", - __func__, stp_req, frame_index, status); - return status; - } - - switch (frame_header->fis_type) { - case FIS_REGD2H: - scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control, - frame_index, - (void **)&frame_buffer); - - scic_sds_controller_copy_sata_response(&sci_req->stp.rsp, - frame_header, - frame_buffer); - - /* The command has completed with error */ - scic_sds_request_set_status(sci_req, - SCU_TASK_DONE_CHECK_RESPONSE, - SCI_FAILURE_IO_RESPONSE_VALID); - break; - - default: - dev_warn(scic_to_dev(scic), - "%s: IO Request:0x%p Frame Id:%d protocol " - "violation occurred\n", __func__, stp_req, - frame_index); - - scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS, - SCI_FAILURE_PROTOCOL_VIOLATION); - break; - } - - sci_base_state_machine_change_state(&sci_req->state_machine, - SCI_BASE_REQUEST_STATE_COMPLETED); - - /* Frame has been decoded return it to the controller */ - scic_sds_controller_release_frame(scic, frame_index); - - return status; -} - -/* --------------------------------------------------------------------------- */ - -static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_soft_reset_substate_handler_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_asserted_tc_completion_handler, - }, - [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_completion_handler, - }, - [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = { - .abort_handler = scic_sds_request_started_state_abort_handler, - .frame_handler = scic_sds_stp_request_soft_reset_await_d2h_frame_handler, - }, -}; - -static void scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_soft_reset_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE - ); - - scic_sds_remote_device_set_working_request( - sci_req->target_device, sci_req - ); -} - -static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - struct scu_task_context *task_context; - struct host_to_dev_fis *h2d_fis; - enum sci_status status; - - /* Clear the SRST bit */ - h2d_fis = &sci_req->stp.cmd; - h2d_fis->control = 0; - - /* Clear the TC control bit */ - task_context = scic_sds_controller_get_task_context_buffer( - sci_req->owning_controller, sci_req->io_tag); - task_context->control_frame = 0; - - status = scic_controller_continue_io(sci_req); - if (status == SCI_SUCCESS) { - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_soft_reset_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE - ); - } -} - -static void scic_sds_stp_request_started_soft_reset_await_d2h_response_enter( - void *object) -{ - struct scic_sds_request *sci_req = object; - - SET_STATE_HANDLER( - sci_req, - scic_sds_stp_request_started_soft_reset_substate_handler_table, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE - ); -} - -static const struct sci_base_state scic_sds_stp_request_started_soft_reset_substate_table[] = { - [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter, - }, - [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter, - }, - [SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = { - .enter_state = scic_sds_stp_request_started_soft_reset_await_d2h_response_enter, - }, -}; - -enum sci_status scic_sds_stp_soft_reset_request_construct(struct scic_sds_request *sci_req) -{ - struct scic_sds_stp_request *stp_req = &sci_req->stp.req; - - scic_sds_stp_non_ncq_request_construct(sci_req); - - /* Build the STP task context structure */ - scu_stp_raw_request_construct_task_context(stp_req, sci_req->task_context_buffer); - - sci_base_state_machine_construct(&sci_req->started_substate_machine, - sci_req, - scic_sds_stp_request_started_soft_reset_substate_table, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE); - - return SCI_SUCCESS; -} diff --git a/drivers/scsi/isci/stp_request.h b/drivers/scsi/isci/stp_request.h deleted file mode 100644 index eb14874ceda..00000000000 --- a/drivers/scsi/isci/stp_request.h +++ /dev/null @@ -1,195 +0,0 @@ -/* - * This file is provided under a dual BSD/GPLv2 license. When using or - * redistributing this file, you may do so under either license. - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * BSD LICENSE - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef _SCIC_SDS_STP_REQUEST_T_ -#define _SCIC_SDS_STP_REQUEST_T_ - -#include <linux/dma-mapping.h> -#include <scsi/sas.h> - -struct scic_sds_stp_request { - union { - u32 ncq; - - u32 udma; - - struct scic_sds_stp_pio_request { - /** - * Total transfer for the entire PIO request recorded at request constuction - * time. - * - * @todo Should we just decrement this value for each byte of data transitted - * or received to elemenate the current_transfer_bytes field? - */ - u32 total_transfer_bytes; - - /** - * Total number of bytes received/transmitted in data frames since the start - * of the IO request. At the end of the IO request this should equal the - * total_transfer_bytes. - */ - u32 current_transfer_bytes; - - /** - * The number of bytes requested in the in the PIO setup. - */ - u32 pio_transfer_bytes; - - /** - * PIO Setup ending status value to tell us if we need to wait for another FIS - * or if the transfer is complete. On the receipt of a D2H FIS this will be - * the status field of that FIS. - */ - u8 ending_status; - - /** - * On receipt of a D2H FIS this will be the ending error field if the - * ending_status has the SATA_STATUS_ERR bit set. - */ - u8 ending_error; - - struct scic_sds_request_pio_sgl { - struct scu_sgl_element_pair *sgl_pair; - u8 sgl_set; - u32 sgl_offset; - } request_current; - } pio; - - struct { - /** - * The number of bytes requested in the PIO setup before CDB data frame. - */ - u32 device_preferred_cdb_length; - } packet; - } type; -}; - -/** - * enum scic_sds_stp_request_started_udma_substates - This enumeration depicts - * the various sub-states associated with a SATA/STP UDMA protocol operation. - * - * - */ -enum scic_sds_stp_request_started_udma_substates { - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE, -}; - -/** - * enum scic_sds_stp_request_started_non_data_substates - This enumeration - * depicts the various sub-states associated with a SATA/STP non-data - * protocol operation. - * - * - */ -enum scic_sds_stp_request_started_non_data_substates { - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE, -}; - -/** - * enum scic_sds_stp_request_started_soft_reset_substates - THis enumeration - * depicts the various sub-states associated with a SATA/STP soft reset - * operation. - * - * - */ -enum scic_sds_stp_request_started_soft_reset_substates { - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE, - SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE, -}; - -/* This is the enumeration of the SATA PIO DATA IN started substate machine. */ -enum _scic_sds_stp_request_started_pio_substates { - /** - * While in this state the IO request object is waiting for the TC completion - * notification for the H2D Register FIS - */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE, - - /** - * While in this state the IO request object is waiting for either a PIO Setup - * FIS or a D2H register FIS. The type of frame received is based on the - * result of the prior frame and line conditions. - */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE, - - /** - * While in this state the IO request object is waiting for a DATA frame from - * the device. - */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE, - - /** - * While in this state the IO request object is waiting to transmit the next data - * frame to the device. - */ - SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE, -}; - -struct scic_sds_request; - -enum sci_status scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req, - bool copy_rx_frame); -enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req, - u32 transfer_length, - enum dma_data_direction dir); -enum sci_status scic_sds_stp_non_data_request_construct(struct scic_sds_request *sci_req); -enum sci_status scic_sds_stp_soft_reset_request_construct(struct scic_sds_request *sci_req); -enum sci_status scic_sds_stp_ncq_request_construct(struct scic_sds_request *sci_req, - u32 transfer_length, - enum dma_data_direction dir); -#endif /* _SCIC_SDS_STP_REQUEST_T_ */ |