diff options
| -rw-r--r-- | drivers/scsi/isci/remote_device.c | 334 | ||||
| -rw-r--r-- | drivers/scsi/isci/remote_device.h | 6 |
2 files changed, 125 insertions, 215 deletions
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c index 658781dd65e6..f4ba5be00c03 100644 --- a/drivers/scsi/isci/remote_device.c +++ b/drivers/scsi/isci/remote_device.c @@ -305,22 +305,132 @@ enum sci_status scic_sds_remote_device_event_handler( return sci_dev->state_handlers->event_handler(sci_dev, event_code); } -/** - * - * @controller: The controller that is starting the io request. - * @sci_dev: The remote device for which the start io handling is being - * requested. - * @io_request: The io request that is being started. - * - * This method invokes the remote device start io handler. enum sci_status - */ -enum sci_status scic_sds_remote_device_start_io( - struct scic_sds_controller *controller, - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *io_request) +static void scic_sds_remote_device_start_request(struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req, + enum sci_status status) { - return sci_dev->state_handlers->start_io_handler( - sci_dev, io_request); + struct scic_sds_port *sci_port = sci_dev->owning_port; + + /* cleanup requests that failed after starting on the port */ + if (status != SCI_SUCCESS) + scic_sds_port_complete_io(sci_port, sci_dev, sci_req); + else + scic_sds_remote_device_increment_request_count(sci_dev); +} + +enum sci_status scic_sds_remote_device_start_io(struct scic_sds_controller *scic, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + struct sci_base_state_machine *sm = &sci_dev->state_machine; + enum scic_sds_remote_device_states state = sm->current_state_id; + struct scic_sds_port *sci_port = sci_dev->owning_port; + enum sci_status status; + + switch (state) { + case SCI_BASE_REMOTE_DEVICE_STATE_INITIAL: + case SCI_BASE_REMOTE_DEVICE_STATE_STOPPED: + case SCI_BASE_REMOTE_DEVICE_STATE_STARTING: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR: + case SCI_BASE_REMOTE_DEVICE_STATE_STOPPING: + case SCI_BASE_REMOTE_DEVICE_STATE_FAILED: + case SCI_BASE_REMOTE_DEVICE_STATE_RESETTING: + case SCI_BASE_REMOTE_DEVICE_STATE_FINAL: + default: + dev_warn(scirdev_to_dev(sci_dev), "%s: in wrong state: %d\n", + __func__, state); + return SCI_FAILURE_INVALID_STATE; + case SCI_BASE_REMOTE_DEVICE_STATE_READY: + /* attempt to start an io request for this device object. The remote + * device object will issue the start request for the io and if + * successful it will start the request for the port object then + * increment its own request count. + */ + status = scic_sds_port_start_io(sci_port, sci_dev, sci_req); + if (status != SCI_SUCCESS) + return status; + + status = scic_sds_remote_node_context_start_io(&sci_dev->rnc, sci_req); + if (status != SCI_SUCCESS) + break; + + status = scic_sds_request_start(sci_req); + break; + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: { + /* handle the start io operation for a sata device that is in + * the command idle state. - Evalute the type of IO request to + * be started - If its an NCQ request change to NCQ substate - + * If its any other command change to the CMD substate + * + * If this is a softreset we may want to have a different + * substate. + */ + enum scic_sds_remote_device_states new_state; + + status = scic_sds_port_start_io(sci_port, sci_dev, sci_req); + if (status != SCI_SUCCESS) + return status; + + status = scic_sds_remote_node_context_start_io(&sci_dev->rnc, sci_req); + if (status != SCI_SUCCESS) + break; + + status = sci_req->state_handlers->start_handler(sci_req); + if (status != SCI_SUCCESS) + break; + + if (isci_sata_get_sat_protocol(sci_req->ireq) == SAT_PROTOCOL_FPDMA) + new_state = SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ; + else { + sci_dev->working_request = sci_req; + new_state = SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD; + } + sci_base_state_machine_change_state(sm, new_state); + break; + } + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ: + if (isci_sata_get_sat_protocol(sci_req->ireq) == SAT_PROTOCOL_FPDMA) { + status = scic_sds_port_start_io(sci_port, sci_dev, sci_req); + if (status != SCI_SUCCESS) + return status; + + status = scic_sds_remote_node_context_start_io(&sci_dev->rnc, sci_req); + if (status != SCI_SUCCESS) + break; + + status = sci_req->state_handlers->start_handler(sci_req); + } else + return SCI_FAILURE_INVALID_STATE; + break; + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET: + return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; + case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: + status = scic_sds_port_start_io(sci_port, sci_dev, sci_req); + if (status != SCI_SUCCESS) + return status; + + status = scic_sds_remote_node_context_start_io(&sci_dev->rnc, sci_req); + if (status != SCI_SUCCESS) + break; + + status = scic_sds_request_start(sci_req); + if (status != SCI_SUCCESS) + break; + + sci_dev->working_request = sci_req; + sci_base_state_machine_change_state(&sci_dev->state_machine, + SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD); + break; + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD: + case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD: + /* device is already handling a command it can not accept new commands + * until this one is complete. + */ + return SCI_FAILURE_INVALID_STATE; + } + + scic_sds_remote_device_start_request(sci_dev, sci_req, status); + return status; } /** @@ -411,32 +521,6 @@ static void remote_device_resume_done(void *_dev) /** * - * @device: This parameter specifies the device for which the request is being - * started. - * @request: This parameter specifies the request being started. - * @status: This parameter specifies the current start operation status. - * - * This method will perform the STP request start processing common to IO - * requests and task requests of all types. none - */ -static void scic_sds_remote_device_start_request( - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req, - enum sci_status status) -{ - /* We still have a fault in starting the io complete it on the port */ - if (status == SCI_SUCCESS) - scic_sds_remote_device_increment_request_count(sci_dev); - else{ - sci_dev->owning_port->state_handlers->complete_io_handler( - sci_dev->owning_port, sci_dev, sci_req - ); - } -} - - -/** - * * @request: This parameter specifies the request being continued. * * This method will continue to post tc for a STP request. This method usually @@ -700,35 +784,6 @@ static enum sci_status scic_sds_remote_device_ready_state_start_task_handler( } /* - * This method will attempt to start an io request for this device object. The - * remote device object will issue the start request for the io and if - * successful it will start the request for the port object then increment its - * own requet count. enum sci_status SCI_SUCCESS if the io request is started for - * this device object. SCI_FAILURE_INSUFFICIENT_RESOURCES if the io request - * object could not get the resources to start. - */ -static enum sci_status scic_sds_remote_device_ready_state_start_io_handler( - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *request) -{ - enum sci_status result; - - /* See if the port is in a state where we can start the IO request */ - result = scic_sds_port_start_io( - scic_sds_remote_device_get_port(sci_dev), sci_dev, request); - - if (result == SCI_SUCCESS) { - result = scic_sds_remote_node_context_start_io(&sci_dev->rnc, request); - if (result == SCI_SUCCESS) - result = scic_sds_request_start(request); - - scic_sds_remote_device_start_request(sci_dev, request, result); - } - - return result; -} - -/* * This method will complete the request for the remote device object. The * method will call the completion handler for the request object and if * successful it will complete the request on the port object then decrement @@ -920,48 +975,6 @@ out: return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS; } -/* handle the start io operation for a sata device that is in the command idle - * state. - Evalute the type of IO request to be started - If its an NCQ - * request change to NCQ substate - If its any other command change to the CMD - * substate - * - * If this is a softreset we may want to have a different substate. - */ -static enum sci_status scic_sds_stp_remote_device_ready_idle_substate_start_io_handler( - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *request) -{ - enum sci_status status; - struct isci_request *isci_request = request->ireq; - enum scic_sds_remote_device_states new_state; - - /* Will the port allow the io request to start? */ - status = sci_dev->owning_port->state_handlers->start_io_handler( - sci_dev->owning_port, sci_dev, request); - if (status != SCI_SUCCESS) - return status; - - status = scic_sds_remote_node_context_start_io(&sci_dev->rnc, request); - if (status != SCI_SUCCESS) - goto out; - - status = request->state_handlers->start_handler(request); - if (status != SCI_SUCCESS) - goto out; - - if (isci_sata_get_sat_protocol(isci_request) == SAT_PROTOCOL_FPDMA) - new_state = SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ; - else { - sci_dev->working_request = request; - new_state = SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD; - } - sci_base_state_machine_change_state(&sci_dev->state_machine, new_state); -out: - scic_sds_remote_device_start_request(sci_dev, request, status); - return status; -} - - static enum sci_status scic_sds_stp_remote_device_ready_idle_substate_event_handler( struct scic_sds_remote_device *sci_dev, u32 event_code) @@ -982,31 +995,6 @@ static enum sci_status scic_sds_stp_remote_device_ready_idle_substate_event_hand return status; } -static enum sci_status scic_sds_stp_remote_device_ready_ncq_substate_start_io_handler( - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *request) -{ - enum sci_status status; - struct isci_request *isci_request = request->ireq; - scic_sds_port_io_request_handler_t start_io; - - if (isci_sata_get_sat_protocol(isci_request) == SAT_PROTOCOL_FPDMA) { - start_io = sci_dev->owning_port->state_handlers->start_io_handler; - status = start_io(sci_dev->owning_port, sci_dev, request); - if (status != SCI_SUCCESS) - return status; - - status = scic_sds_remote_node_context_start_io(&sci_dev->rnc, request); - if (status == SCI_SUCCESS) - status = request->state_handlers->start_handler(request); - - scic_sds_remote_device_start_request(sci_dev, request, status); - } else - status = SCI_FAILURE_INVALID_STATE; - - return status; -} - static enum sci_status scic_sds_stp_remote_device_ready_ncq_substate_frame_handler(struct scic_sds_remote_device *sci_dev, u32 frame_index) { @@ -1046,16 +1034,6 @@ static enum sci_status scic_sds_stp_remote_device_ready_ncq_substate_frame_handl return status; } -static enum sci_status scic_sds_stp_remote_device_ready_cmd_substate_start_io_handler( - struct scic_sds_remote_device *device, - struct scic_sds_request *request) -{ - /* device is already handling a command it can not accept new commands - * until this one is complete. - */ - return SCI_FAILURE_INVALID_STATE; -} - static enum sci_status scic_sds_stp_remote_device_ready_cmd_substate_suspend_handler( struct scic_sds_remote_device *sci_dev, u32 suspend_type) @@ -1080,13 +1058,6 @@ static enum sci_status scic_sds_stp_remote_device_ready_cmd_substate_frame_handl frame_index); } -static enum sci_status scic_sds_stp_remote_device_ready_await_reset_substate_start_io_handler( - struct scic_sds_remote_device *device, - struct scic_sds_request *request) -{ - return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; -} - static enum sci_status scic_sds_stp_remote_device_ready_await_reset_substate_complete_request_handler( struct scic_sds_remote_device *device, struct scic_sds_request *request) @@ -1126,46 +1097,6 @@ static void scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handl isci_remote_device_ready(scic->ihost, idev); } -static enum sci_status scic_sds_smp_remote_device_ready_idle_substate_start_io_handler( - struct scic_sds_remote_device *sci_dev, - struct scic_sds_request *sci_req) -{ - enum sci_status status; - - /* Will the port allow the io request to start? */ - status = sci_dev->owning_port->state_handlers->start_io_handler( - sci_dev->owning_port, sci_dev, sci_req); - if (status != SCI_SUCCESS) - return status; - - status = scic_sds_remote_node_context_start_io(&sci_dev->rnc, sci_req); - if (status != SCI_SUCCESS) - goto out; - - status = scic_sds_request_start(sci_req); - if (status != SCI_SUCCESS) - goto out; - - sci_dev->working_request = sci_req; - sci_base_state_machine_change_state(&sci_dev->state_machine, - SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD); - - out: - scic_sds_remote_device_start_request(sci_dev, sci_req, status); - - return status; -} - -static enum sci_status scic_sds_smp_remote_device_ready_cmd_substate_start_io_handler( - struct scic_sds_remote_device *device, - struct scic_sds_request *request) -{ - /* device is already handling a command it can not accept new commands - * until this one is complete. - */ - return SCI_FAILURE_INVALID_STATE; -} - static enum sci_status scic_sds_smp_remote_device_ready_cmd_substate_complete_io_handler(struct scic_sds_remote_device *sci_dev, struct scic_sds_request *sci_req) @@ -1213,7 +1144,6 @@ static enum sci_status scic_sds_smp_remote_device_ready_cmd_substate_frame_handl static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_state_handler_table[] = { [SCI_BASE_REMOTE_DEVICE_STATE_INITIAL] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_remote_device_default_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1224,7 +1154,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_STOPPED] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_remote_device_default_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1235,7 +1164,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_STARTING] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_remote_device_default_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1246,7 +1174,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_READY] = { - .start_io_handler = scic_sds_remote_device_ready_state_start_io_handler, .complete_io_handler = scic_sds_remote_device_ready_state_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_ready_state_start_task_handler, @@ -1257,7 +1184,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_general_frame_handler, }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = { - .start_io_handler = scic_sds_stp_remote_device_ready_idle_substate_start_io_handler, .complete_io_handler = scic_sds_remote_device_default_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_stp_remote_device_ready_substate_start_request_handler, @@ -1268,7 +1194,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = { - .start_io_handler = scic_sds_stp_remote_device_ready_cmd_substate_start_io_handler, .complete_io_handler = scic_sds_stp_remote_device_complete_request, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_stp_remote_device_ready_substate_start_request_handler, @@ -1279,7 +1204,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_stp_remote_device_ready_cmd_substate_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ] = { - .start_io_handler = scic_sds_stp_remote_device_ready_ncq_substate_start_io_handler, .complete_io_handler = scic_sds_stp_remote_device_complete_request, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_stp_remote_device_ready_substate_start_request_handler, @@ -1290,7 +1214,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_stp_remote_device_ready_ncq_substate_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_stp_remote_device_complete_request, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_stp_remote_device_ready_substate_start_request_handler, @@ -1301,7 +1224,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET] = { - .start_io_handler = scic_sds_stp_remote_device_ready_await_reset_substate_start_io_handler, .complete_io_handler = scic_sds_stp_remote_device_ready_await_reset_substate_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_stp_remote_device_ready_substate_start_request_handler, @@ -1312,7 +1234,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE] = { - .start_io_handler = scic_sds_smp_remote_device_ready_idle_substate_start_io_handler, .complete_io_handler = scic_sds_remote_device_default_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1323,7 +1244,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_default_frame_handler }, [SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD] = { - .start_io_handler = scic_sds_smp_remote_device_ready_cmd_substate_start_io_handler, .complete_io_handler = scic_sds_smp_remote_device_ready_cmd_substate_complete_io_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1334,7 +1254,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_smp_remote_device_ready_cmd_substate_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_STOPPING] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_remote_device_stopping_state_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1345,7 +1264,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_FAILED] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_remote_device_default_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1356,7 +1274,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_RESETTING] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_remote_device_resetting_state_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, @@ -1367,7 +1284,6 @@ static const struct scic_sds_remote_device_state_handler scic_sds_remote_device_ .frame_handler = scic_sds_remote_device_general_frame_handler }, [SCI_BASE_REMOTE_DEVICE_STATE_FINAL] = { - .start_io_handler = scic_sds_remote_device_default_start_request_handler, .complete_io_handler = scic_sds_remote_device_default_complete_request_handler, .continue_io_handler = scic_sds_remote_device_default_continue_request_handler, .start_task_handler = scic_sds_remote_device_default_start_request_handler, diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h index 51094352d952..58ce41af9e66 100644 --- a/drivers/scsi/isci/remote_device.h +++ b/drivers/scsi/isci/remote_device.h @@ -387,12 +387,6 @@ typedef void (*scic_sds_remote_device_ready_not_ready_handler_t)( */ struct scic_sds_remote_device_state_handler { /** - * The start_io_handler specifies the method invoked when a user - * attempts to start an IO request for a remote device. - */ - scic_sds_remote_device_request_handler_t start_io_handler; - - /** * The complete_io_handler specifies the method invoked when a user * attempts to complete an IO request for a remote device. */ |