From: Dan Williams Date: Sun, 1 May 2011 21:19:25 +0000 (-0700) Subject: isci: unify remote_device stop_handlers X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ec5756699b705c179a0680985e3d18a093f93fae;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git isci: unify remote_device stop_handlers Implement all states in scic_remote_device_stop() and delete the state handlers. Reported-by: Christoph Hellwig Signed-off-by: Dan Williams --- diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c index 80eccdc1090f..d779939a6175 100644 --- a/drivers/scsi/isci/remote_device.c +++ b/drivers/scsi/isci/remote_device.c @@ -129,13 +129,91 @@ static void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote wake_up(&ihost->eventq); } +/* called once the remote node context is ready to be freed. + * The remote device can now report that its stop operation is complete. none + */ +static void rnc_destruct_done(void *_dev) +{ + struct scic_sds_remote_device *sci_dev = _dev; + BUG_ON(sci_dev->started_request_count != 0); + sci_base_state_machine_change_state(&sci_dev->state_machine, + SCI_BASE_REMOTE_DEVICE_STATE_STOPPED); +} -enum sci_status scic_remote_device_stop( - struct scic_sds_remote_device *sci_dev, - u32 timeout) +static enum sci_status scic_sds_remote_device_terminate_requests(struct scic_sds_remote_device *sci_dev) { - return sci_dev->state_handlers->stop_handler(sci_dev); + struct scic_sds_controller *scic = sci_dev->owning_port->owning_controller; + u32 i, request_count = sci_dev->started_request_count; + enum sci_status status = SCI_SUCCESS; + + for (i = 0; i < SCI_MAX_IO_REQUESTS && i < request_count; i++) { + struct scic_sds_request *sci_req; + enum sci_status s; + + sci_req = scic->io_request_table[i]; + if (!sci_req || sci_req->target_device != sci_dev) + continue; + s = scic_controller_terminate_request(scic, sci_dev, sci_req); + if (s != SCI_SUCCESS) + status = s; + } + + return status; +} + +enum sci_status scic_remote_device_stop(struct scic_sds_remote_device *sci_dev, + u32 timeout) +{ + struct sci_base_state_machine *sm = &sci_dev->state_machine; + enum scic_sds_remote_device_states state = sm->current_state_id; + + switch (state) { + case SCI_BASE_REMOTE_DEVICE_STATE_INITIAL: + case SCI_BASE_REMOTE_DEVICE_STATE_FAILED: + 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_STOPPED: + return SCI_SUCCESS; + case SCI_BASE_REMOTE_DEVICE_STATE_STARTING: + /* device not started so there had better be no requests */ + BUG_ON(sci_dev->started_request_count != 0); + scic_sds_remote_node_context_destruct(&sci_dev->rnc, + rnc_destruct_done, sci_dev); + /* Transition to the stopping state and wait for the + * remote node to complete being posted and invalidated. + */ + sci_base_state_machine_change_state(sm, SCI_BASE_REMOTE_DEVICE_STATE_STOPPING); + return SCI_SUCCESS; + case SCI_BASE_REMOTE_DEVICE_STATE_READY: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR: + case SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET: + case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE: + case SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD: + sci_base_state_machine_change_state(sm, SCI_BASE_REMOTE_DEVICE_STATE_STOPPING); + if (sci_dev->started_request_count == 0) { + scic_sds_remote_node_context_destruct(&sci_dev->rnc, + rnc_destruct_done, sci_dev); + return SCI_SUCCESS; + } else + return scic_sds_remote_device_terminate_requests(sci_dev); + break; + case SCI_BASE_REMOTE_DEVICE_STATE_STOPPING: + /* All requests should have been terminated, but if there is an + * attempt to stop a device already in the stopping state, then + * try again to terminate. + */ + return scic_sds_remote_device_terminate_requests(sci_dev); + case SCI_BASE_REMOTE_DEVICE_STATE_RESETTING: + sci_base_state_machine_change_state(sm, SCI_BASE_REMOTE_DEVICE_STATE_STOPPING); + return SCI_SUCCESS; + } } @@ -275,18 +353,6 @@ void scic_sds_remote_device_post_request( ); } -/* called once the remote node context is ready to be freed. - * The remote device can now report that its stop operation is complete. none - */ -static void scic_sds_cb_remote_device_rnc_destruct_complete(void *_dev) -{ - struct scic_sds_remote_device *sci_dev = _dev; - - BUG_ON(sci_dev->started_request_count != 0); - sci_base_state_machine_change_state(&sci_dev->state_machine, - SCI_BASE_REMOTE_DEVICE_STATE_STOPPED); -} - /* called once the remote node context has transisitioned to a * ready state. This is the indication that the remote device object can also * transition to ready. @@ -358,47 +424,6 @@ static void scic_sds_remote_device_continue_request(void *dev) scic_controller_continue_io(sci_dev->working_request); } -/** - * This method will terminate all of the IO requests in the controllers IO - * request table that were targeted for this device. - * @sci_dev: This parameter specifies the remote device for which to - * attempt to terminate all requests. - * - * This method returns an indication as to whether all requests were - * successfully terminated. If a single request fails to be terminated, then - * this method will return the failure. - */ -static enum sci_status scic_sds_remote_device_terminate_requests( - struct scic_sds_remote_device *sci_dev) -{ - enum sci_status status = SCI_SUCCESS; - enum sci_status terminate_status = SCI_SUCCESS; - struct scic_sds_request *sci_req; - u32 index; - u32 request_count = sci_dev->started_request_count; - - for (index = 0; - (index < SCI_MAX_IO_REQUESTS) && (request_count > 0); - index++) { - sci_req = sci_dev->owning_port->owning_controller->io_request_table[index]; - - if ((sci_req != NULL) && (sci_req->target_device == sci_dev)) { - terminate_status = scic_controller_terminate_request( - sci_dev->owning_port->owning_controller, - sci_dev, - sci_req - ); - - if (terminate_status != SCI_SUCCESS) - status = terminate_status; - - request_count--; - } - } - - return status; -} - static enum sci_status default_device_handler(struct scic_sds_remote_device *sci_dev, const char *func) @@ -409,12 +434,6 @@ default_device_handler(struct scic_sds_remote_device *sci_dev, return SCI_FAILURE_INVALID_STATE; } -static enum sci_status scic_sds_remote_device_default_stop_handler( - struct scic_sds_remote_device *sci_dev) -{ - return default_device_handler(sci_dev, __func__); -} - static enum sci_status scic_sds_remote_device_default_fail_handler( struct scic_sds_remote_device *sci_dev) { @@ -646,12 +665,6 @@ static enum sci_status scic_sds_remote_device_general_event_handler( true); } -static enum sci_status scic_sds_remote_device_stopped_state_stop_handler( - struct scic_sds_remote_device *sci_dev) -{ - return SCI_SUCCESS; -} - /** * * @sci_dev: The struct scic_sds_remote_device which is cast into a @@ -679,54 +692,6 @@ static enum sci_status scic_sds_remote_device_stopped_state_destruct_handler( return SCI_SUCCESS; } -/* - * ***************************************************************************** - * * STARTING STATE HANDLERS - * ***************************************************************************** */ - -static enum sci_status scic_sds_remote_device_starting_state_stop_handler( - struct scic_sds_remote_device *sci_dev) -{ - /* - * This device has not yet started so there had better be no IO requests - */ - BUG_ON(sci_dev->started_request_count != 0); - - /* - * Destroy the remote node context - */ - scic_sds_remote_node_context_destruct(&sci_dev->rnc, - scic_sds_cb_remote_device_rnc_destruct_complete, sci_dev); - - /* - * Transition to the stopping state and wait for the remote node to - * complete being posted and invalidated. - */ - sci_base_state_machine_change_state(&sci_dev->state_machine, - SCI_BASE_REMOTE_DEVICE_STATE_STOPPING); - - return SCI_SUCCESS; -} - -static enum sci_status scic_sds_remote_device_ready_state_stop_handler( - struct scic_sds_remote_device *sci_dev) -{ - enum sci_status status = SCI_SUCCESS; - - /* Request the parent state machine to transition to the stopping state */ - sci_base_state_machine_change_state(&sci_dev->state_machine, - SCI_BASE_REMOTE_DEVICE_STATE_STOPPING); - - if (sci_dev->started_request_count == 0) { - scic_sds_remote_node_context_destruct(&sci_dev->rnc, - scic_sds_cb_remote_device_rnc_destruct_complete, - sci_dev); - } else - status = scic_sds_remote_device_terminate_requests(sci_dev); - - return status; -} - /** * * @device: The struct scic_sds_remote_device object which is cast to a @@ -832,32 +797,6 @@ static enum sci_status scic_sds_remote_device_ready_state_complete_request_handl return result; } -/* - * ***************************************************************************** - * * STOPPING STATE HANDLERS - * ***************************************************************************** */ - -/** - * - * @sci_dev: The struct scic_sds_remote_device which is cast into a - * struct scic_sds_remote_device. - * - * This method will stop a struct scic_sds_remote_device that is already in the - * SCI_BASE_REMOTE_DEVICE_STATE_STOPPING state. This is not considered an error - * since we allow a stop request on a device that is alreay stopping or - * stopped. enum sci_status SCI_SUCCESS - */ -static enum sci_status scic_sds_remote_device_stopping_state_stop_handler( - struct scic_sds_remote_device *device) -{ - /* - * All requests should have been terminated, but if there is an - * attempt to stop a device already in the stopping state, then - * try again to terminate. */ - return scic_sds_remote_device_terminate_requests(device); -} - - /** * * @device: The device object for which the request is completing. @@ -891,8 +830,7 @@ static enum sci_status scic_sds_remote_device_stopping_state_complete_request_ha if (scic_sds_remote_device_get_request_count(sci_dev) == 0) scic_sds_remote_node_context_destruct(&sci_dev->rnc, - scic_sds_cb_remote_device_rnc_destruct_complete, - sci_dev); + rnc_destruct_done, sci_dev); return SCI_SUCCESS; } @@ -905,17 +843,6 @@ static enum sci_status scic_sds_remote_device_resetting_state_reset_complete_han return SCI_SUCCESS; } -static enum sci_status scic_sds_remote_device_resetting_state_stop_handler( - struct scic_sds_remote_device *sci_dev) -{ - sci_base_state_machine_change_state( - &sci_dev->state_machine, - SCI_BASE_REMOTE_DEVICE_STATE_STOPPING - ); - - return SCI_SUCCESS; -} - /* complete requests for this device while it is in the * SCI_BASE_REMOTE_DEVICE_STATE_RESETTING state. This method calls the complete * method for the request object and if that is successful the port object is @@ -1335,7 +1262,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_default_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1351,7 +1277,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_stopped_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_stopped_state_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1367,7 +1292,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_starting_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1383,7 +1307,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_ready_state_reset_handler, @@ -1399,7 +1322,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_ready_state_reset_handler, @@ -1415,7 +1337,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_ready_state_reset_handler, @@ -1431,7 +1352,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_ready_state_reset_handler, @@ -1447,7 +1367,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_ready_state_reset_handler, @@ -1463,7 +1382,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_ready_state_reset_handler, @@ -1479,7 +1397,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1495,7 +1412,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_ready_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1511,7 +1427,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_stopping_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1527,7 +1442,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_default_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1543,7 +1457,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_resetting_state_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, @@ -1559,7 +1472,6 @@ 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] = { - .stop_handler = scic_sds_remote_device_default_stop_handler, .fail_handler = scic_sds_remote_device_default_fail_handler, .destruct_handler = scic_sds_remote_device_default_destruct_handler, .reset_handler = scic_sds_remote_device_default_reset_handler, diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h index b778e0b49e33..ca8c5d16f790 100644 --- a/drivers/scsi/isci/remote_device.h +++ b/drivers/scsi/isci/remote_device.h @@ -386,12 +386,6 @@ typedef void (*scic_sds_remote_device_ready_not_ready_handler_t)( * */ struct scic_sds_remote_device_state_handler { - /** - * The stop_handler specifies the method invoked when a user attempts to - * stop a remote device. - */ - scic_sds_remote_device_handler_t stop_handler; - /** * The fail_handler specifies the method invoked when a remote device * failure has occurred. A failure may be due to an inability to