diff options
Diffstat (limited to 'drivers/scsi/isci/task.c')
| -rw-r--r-- | drivers/scsi/isci/task.c | 800 |
1 files changed, 143 insertions, 657 deletions
diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c index 374254ede9d..6bc74eb012c 100644 --- a/drivers/scsi/isci/task.c +++ b/drivers/scsi/isci/task.c @@ -78,54 +78,25 @@ static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task, enum exec_status status) { - enum isci_completion_selection disposition; + unsigned long flags; - disposition = isci_perform_normal_io_completion; - disposition = isci_task_set_completion_status(task, response, status, - disposition); + /* Normal notification (task_done) */ + dev_dbg(&ihost->pdev->dev, "%s: task = %p, response=%d, status=%d\n", + __func__, task, response, status); - /* Tasks aborted specifically by a call to the lldd_abort_task - * function should not be completed to the host in the regular path. - */ - switch (disposition) { - case isci_perform_normal_io_completion: - /* Normal notification (task_done) */ - dev_dbg(&ihost->pdev->dev, - "%s: Normal - task = %p, response=%d, " - "status=%d\n", - __func__, task, response, status); - - task->lldd_task = NULL; - task->task_done(task); - break; - - case isci_perform_aborted_io_completion: - /* - * No notification because this request is already in the - * abort path. - */ - dev_dbg(&ihost->pdev->dev, - "%s: Aborted - task = %p, response=%d, " - "status=%d\n", - __func__, task, response, status); - break; + spin_lock_irqsave(&task->task_state_lock, flags); - case isci_perform_error_io_completion: - /* Use sas_task_abort */ - dev_dbg(&ihost->pdev->dev, - "%s: Error - task = %p, response=%d, " - "status=%d\n", - __func__, task, response, status); - sas_task_abort(task); - break; + task->task_status.resp = response; + task->task_status.stat = status; - default: - dev_dbg(&ihost->pdev->dev, - "%s: isci task notification default case!", - __func__); - sas_task_abort(task); - break; - } + /* Normal notification (task_done) */ + task->task_state_flags |= SAS_TASK_STATE_DONE; + task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR | + SAS_TASK_STATE_PENDING); + task->lldd_task = NULL; + spin_unlock_irqrestore(&task->task_state_lock, flags); + + task->task_done(task); } #define for_each_sas_task(num, task) \ @@ -289,60 +260,6 @@ static struct isci_request *isci_task_request_build(struct isci_host *ihost, return ireq; } -/** -* isci_request_mark_zombie() - This function must be called with scic_lock held. -*/ -static void isci_request_mark_zombie(struct isci_host *ihost, struct isci_request *ireq) -{ - struct completion *tmf_completion = NULL; - struct completion *req_completion; - - /* Set the request state to "dead". */ - ireq->status = dead; - - req_completion = ireq->io_request_completion; - ireq->io_request_completion = NULL; - - if (test_bit(IREQ_TMF, &ireq->flags)) { - /* Break links with the TMF request. */ - struct isci_tmf *tmf = isci_request_access_tmf(ireq); - - /* In the case where a task request is dying, - * the thread waiting on the complete will sit and - * timeout unless we wake it now. Since the TMF - * has a default error status, complete it here - * to wake the waiting thread. - */ - if (tmf) { - tmf_completion = tmf->complete; - tmf->complete = NULL; - } - ireq->ttype_ptr.tmf_task_ptr = NULL; - dev_dbg(&ihost->pdev->dev, "%s: tmf_code %d, managed tag %#x\n", - __func__, tmf->tmf_code, tmf->io_tag); - } else { - /* Break links with the sas_task - the callback is done - * elsewhere. - */ - struct sas_task *task = isci_request_access_task(ireq); - - if (task) - task->lldd_task = NULL; - - ireq->ttype_ptr.io_task_ptr = NULL; - } - - dev_warn(&ihost->pdev->dev, "task context unrecoverable (tag: %#x)\n", - ireq->io_tag); - - /* Don't force waiting threads to timeout. */ - if (req_completion) - complete(req_completion); - - if (tmf_completion != NULL) - complete(tmf_completion); -} - static int isci_task_execute_tmf(struct isci_host *ihost, struct isci_remote_device *idev, struct isci_tmf *tmf, unsigned long timeout_ms) @@ -400,17 +317,11 @@ static int isci_task_execute_tmf(struct isci_host *ihost, spin_unlock_irqrestore(&ihost->scic_lock, flags); goto err_tci; } - - if (tmf->cb_state_func != NULL) - tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data); - - isci_request_change_state(ireq, started); - - /* add the request to the remote device request list. */ - list_add(&ireq->dev_node, &idev->reqs_in_process); - spin_unlock_irqrestore(&ihost->scic_lock, flags); + /* The RNC must be unsuspended before the TMF can get a response. */ + isci_remote_device_resume_from_abort(ihost, idev); + /* Wait for the TMF to complete, or a timeout. */ timeleft = wait_for_completion_timeout(&completion, msecs_to_jiffies(timeout_ms)); @@ -419,32 +330,7 @@ static int isci_task_execute_tmf(struct isci_host *ihost, /* The TMF did not complete - this could be because * of an unplug. Terminate the TMF request now. */ - spin_lock_irqsave(&ihost->scic_lock, flags); - - if (tmf->cb_state_func != NULL) - tmf->cb_state_func(isci_tmf_timed_out, tmf, - tmf->cb_data); - - sci_controller_terminate_request(ihost, idev, ireq); - - spin_unlock_irqrestore(&ihost->scic_lock, flags); - - timeleft = wait_for_completion_timeout( - &completion, - msecs_to_jiffies(ISCI_TERMINATION_TIMEOUT_MSEC)); - - if (!timeleft) { - /* Strange condition - the termination of the TMF - * request timed-out. - */ - spin_lock_irqsave(&ihost->scic_lock, flags); - - /* If the TMF status has not changed, kill it. */ - if (tmf->status == SCI_FAILURE_TIMEOUT) - isci_request_mark_zombie(ihost, ireq); - - spin_unlock_irqrestore(&ihost->scic_lock, flags); - } + isci_remote_device_suspend_terminate(ihost, idev, ireq); } isci_print_tmf(ihost, tmf); @@ -476,315 +362,21 @@ static int isci_task_execute_tmf(struct isci_host *ihost, } static void isci_task_build_tmf(struct isci_tmf *tmf, - enum isci_tmf_function_codes code, - void (*tmf_sent_cb)(enum isci_tmf_cb_state, - struct isci_tmf *, - void *), - void *cb_data) + enum isci_tmf_function_codes code) { memset(tmf, 0, sizeof(*tmf)); - - tmf->tmf_code = code; - tmf->cb_state_func = tmf_sent_cb; - tmf->cb_data = cb_data; + tmf->tmf_code = code; } static void isci_task_build_abort_task_tmf(struct isci_tmf *tmf, enum isci_tmf_function_codes code, - void (*tmf_sent_cb)(enum isci_tmf_cb_state, - struct isci_tmf *, - void *), struct isci_request *old_request) { - isci_task_build_tmf(tmf, code, tmf_sent_cb, old_request); + isci_task_build_tmf(tmf, code); tmf->io_tag = old_request->io_tag; } /** - * isci_task_validate_request_to_abort() - This function checks the given I/O - * against the "started" state. If the request is still "started", it's - * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD - * BEFORE CALLING THIS FUNCTION. - * @isci_request: This parameter specifies the request object to control. - * @isci_host: This parameter specifies the ISCI host object - * @isci_device: This is the device to which the request is pending. - * @aborted_io_completion: This is a completion structure that will be added to - * the request in case it is changed to aborting; this completion is - * triggered when the request is fully completed. - * - * Either "started" on successful change of the task status to "aborted", or - * "unallocated" if the task cannot be controlled. - */ -static enum isci_request_status isci_task_validate_request_to_abort( - struct isci_request *isci_request, - struct isci_host *isci_host, - struct isci_remote_device *isci_device, - struct completion *aborted_io_completion) -{ - enum isci_request_status old_state = unallocated; - - /* Only abort the task if it's in the - * device's request_in_process list - */ - if (isci_request && !list_empty(&isci_request->dev_node)) { - old_state = isci_request_change_started_to_aborted( - isci_request, aborted_io_completion); - - } - - return old_state; -} - -static int isci_request_is_dealloc_managed(enum isci_request_status stat) -{ - switch (stat) { - case aborted: - case aborting: - case terminating: - case completed: - case dead: - return true; - default: - return false; - } -} - -/** - * isci_terminate_request_core() - This function will terminate the given - * request, and wait for it to complete. This function must only be called - * from a thread that can wait. Note that the request is terminated and - * completed (back to the host, if started there). - * @ihost: This SCU. - * @idev: The target. - * @isci_request: The I/O request to be terminated. - * - */ -static void isci_terminate_request_core(struct isci_host *ihost, - struct isci_remote_device *idev, - struct isci_request *isci_request) -{ - enum sci_status status = SCI_SUCCESS; - bool was_terminated = false; - bool needs_cleanup_handling = false; - unsigned long flags; - unsigned long termination_completed = 1; - struct completion *io_request_completion; - - dev_dbg(&ihost->pdev->dev, - "%s: device = %p; request = %p\n", - __func__, idev, isci_request); - - spin_lock_irqsave(&ihost->scic_lock, flags); - - io_request_completion = isci_request->io_request_completion; - - /* Note that we are not going to control - * the target to abort the request. - */ - set_bit(IREQ_COMPLETE_IN_TARGET, &isci_request->flags); - - /* Make sure the request wasn't just sitting around signalling - * device condition (if the request handle is NULL, then the - * request completed but needed additional handling here). - */ - if (!test_bit(IREQ_TERMINATED, &isci_request->flags)) { - was_terminated = true; - needs_cleanup_handling = true; - status = sci_controller_terminate_request(ihost, - idev, - isci_request); - } - spin_unlock_irqrestore(&ihost->scic_lock, flags); - - /* - * The only time the request to terminate will - * fail is when the io request is completed and - * being aborted. - */ - if (status != SCI_SUCCESS) { - dev_dbg(&ihost->pdev->dev, - "%s: sci_controller_terminate_request" - " returned = 0x%x\n", - __func__, status); - - isci_request->io_request_completion = NULL; - - } else { - if (was_terminated) { - dev_dbg(&ihost->pdev->dev, - "%s: before completion wait (%p/%p)\n", - __func__, isci_request, io_request_completion); - - /* Wait here for the request to complete. */ - termination_completed - = wait_for_completion_timeout( - io_request_completion, - msecs_to_jiffies(ISCI_TERMINATION_TIMEOUT_MSEC)); - - if (!termination_completed) { - - /* The request to terminate has timed out. */ - spin_lock_irqsave(&ihost->scic_lock, flags); - - /* Check for state changes. */ - if (!test_bit(IREQ_TERMINATED, - &isci_request->flags)) { - - /* The best we can do is to have the - * request die a silent death if it - * ever really completes. - */ - isci_request_mark_zombie(ihost, - isci_request); - needs_cleanup_handling = true; - } else - termination_completed = 1; - - spin_unlock_irqrestore(&ihost->scic_lock, - flags); - - if (!termination_completed) { - - dev_dbg(&ihost->pdev->dev, - "%s: *** Timeout waiting for " - "termination(%p/%p)\n", - __func__, io_request_completion, - isci_request); - - /* The request can no longer be referenced - * safely since it may go away if the - * termination every really does complete. - */ - isci_request = NULL; - } - } - if (termination_completed) - dev_dbg(&ihost->pdev->dev, - "%s: after completion wait (%p/%p)\n", - __func__, isci_request, io_request_completion); - } - - if (termination_completed) { - - isci_request->io_request_completion = NULL; - - /* Peek at the status of the request. This will tell - * us if there was special handling on the request such that it - * needs to be detached and freed here. - */ - spin_lock_irqsave(&isci_request->state_lock, flags); - - needs_cleanup_handling - = isci_request_is_dealloc_managed( - isci_request->status); - - spin_unlock_irqrestore(&isci_request->state_lock, flags); - - } - if (needs_cleanup_handling) { - - dev_dbg(&ihost->pdev->dev, - "%s: cleanup isci_device=%p, request=%p\n", - __func__, idev, isci_request); - - if (isci_request != NULL) { - spin_lock_irqsave(&ihost->scic_lock, flags); - isci_free_tag(ihost, isci_request->io_tag); - isci_request_change_state(isci_request, unallocated); - list_del_init(&isci_request->dev_node); - spin_unlock_irqrestore(&ihost->scic_lock, flags); - } - } - } -} - -/** - * isci_terminate_pending_requests() - This function will change the all of the - * requests on the given device's state to "aborting", will terminate the - * requests, and wait for them to complete. This function must only be - * called from a thread that can wait. Note that the requests are all - * terminated and completed (back to the host, if started there). - * @isci_host: This parameter specifies SCU. - * @idev: This parameter specifies the target. - * - */ -void isci_terminate_pending_requests(struct isci_host *ihost, - struct isci_remote_device *idev) -{ - struct completion request_completion; - enum isci_request_status old_state; - unsigned long flags; - LIST_HEAD(list); - - spin_lock_irqsave(&ihost->scic_lock, flags); - list_splice_init(&idev->reqs_in_process, &list); - - /* assumes that isci_terminate_request_core deletes from the list */ - while (!list_empty(&list)) { - struct isci_request *ireq = list_entry(list.next, typeof(*ireq), dev_node); - - /* Change state to "terminating" if it is currently - * "started". - */ - old_state = isci_request_change_started_to_newstate(ireq, - &request_completion, - terminating); - switch (old_state) { - case started: - case completed: - case aborting: - break; - default: - /* termination in progress, or otherwise dispositioned. - * We know the request was on 'list' so should be safe - * to move it back to reqs_in_process - */ - list_move(&ireq->dev_node, &idev->reqs_in_process); - ireq = NULL; - break; - } - - if (!ireq) - continue; - spin_unlock_irqrestore(&ihost->scic_lock, flags); - - init_completion(&request_completion); - - dev_dbg(&ihost->pdev->dev, - "%s: idev=%p request=%p; task=%p old_state=%d\n", - __func__, idev, ireq, - (!test_bit(IREQ_TMF, &ireq->flags) - ? isci_request_access_task(ireq) - : NULL), - old_state); - - /* If the old_state is started: - * This request was not already being aborted. If it had been, - * then the aborting I/O (ie. the TMF request) would not be in - * the aborting state, and thus would be terminated here. Note - * that since the TMF completion's call to the kernel function - * "complete()" does not happen until the pending I/O request - * terminate fully completes, we do not have to implement a - * special wait here for already aborting requests - the - * termination of the TMF request will force the request - * to finish it's already started terminate. - * - * If old_state == completed: - * This request completed from the SCU hardware perspective - * and now just needs cleaning up in terms of freeing the - * request and potentially calling up to libsas. - * - * If old_state == aborting: - * This request has already gone through a TMF timeout, but may - * not have been terminated; needs cleaning up at least. - */ - isci_terminate_request_core(ihost, idev, ireq); - spin_lock_irqsave(&ihost->scic_lock, flags); - } - spin_unlock_irqrestore(&ihost->scic_lock, flags); -} - -/** * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain * Template functions. * @lun: This parameter specifies the lun to be reset. @@ -807,7 +399,7 @@ static int isci_task_send_lu_reset_sas( * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). */ - isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset, NULL, NULL); + isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset); #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, ISCI_LU_RESET_TIMEOUT_MS); @@ -826,42 +418,44 @@ static int isci_task_send_lu_reset_sas( int isci_task_lu_reset(struct domain_device *dev, u8 *lun) { - struct isci_host *isci_host = dev_to_ihost(dev); - struct isci_remote_device *isci_device; + struct isci_host *ihost = dev_to_ihost(dev); + struct isci_remote_device *idev; unsigned long flags; - int ret; + int ret = TMF_RESP_FUNC_COMPLETE; - spin_lock_irqsave(&isci_host->scic_lock, flags); - isci_device = isci_lookup_device(dev); - spin_unlock_irqrestore(&isci_host->scic_lock, flags); + spin_lock_irqsave(&ihost->scic_lock, flags); + idev = isci_get_device(dev->lldd_dev); + spin_unlock_irqrestore(&ihost->scic_lock, flags); - dev_dbg(&isci_host->pdev->dev, + dev_dbg(&ihost->pdev->dev, "%s: domain_device=%p, isci_host=%p; isci_device=%p\n", - __func__, dev, isci_host, isci_device); + __func__, dev, ihost, idev); - if (!isci_device) { - /* If the device is gone, stop the escalations. */ - dev_dbg(&isci_host->pdev->dev, "%s: No dev\n", __func__); + if (!idev) { + /* If the device is gone, escalate to I_T_Nexus_Reset. */ + dev_dbg(&ihost->pdev->dev, "%s: No dev\n", __func__); - ret = TMF_RESP_FUNC_COMPLETE; + ret = TMF_RESP_FUNC_FAILED; goto out; } - /* Send the task management part of the reset. */ - if (dev_is_sata(dev)) { - sas_ata_schedule_reset(dev); - ret = TMF_RESP_FUNC_COMPLETE; - } else - ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun); - - /* If the LUN reset worked, all the I/O can now be terminated. */ - if (ret == TMF_RESP_FUNC_COMPLETE) - /* Terminate all I/O now. */ - isci_terminate_pending_requests(isci_host, - isci_device); - + /* Suspend the RNC, kill all TCs */ + if (isci_remote_device_suspend_terminate(ihost, idev, NULL) + != SCI_SUCCESS) { + /* The suspend/terminate only fails if isci_get_device fails */ + ret = TMF_RESP_FUNC_FAILED; + goto out; + } + /* All pending I/Os have been terminated and cleaned up. */ + if (!test_bit(IDEV_GONE, &idev->flags)) { + if (dev_is_sata(dev)) + sas_ata_schedule_reset(dev); + else + /* Send the task management part of the reset. */ + ret = isci_task_send_lu_reset_sas(ihost, idev, lun); + } out: - isci_put_device(isci_device); + isci_put_device(idev); return ret; } @@ -882,63 +476,6 @@ int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) /* Task Management Functions. Must be called from process context. */ /** - * isci_abort_task_process_cb() - This is a helper function for the abort task - * TMF command. It manages the request state with respect to the successful - * transmission / completion of the abort task request. - * @cb_state: This parameter specifies when this function was called - after - * the TMF request has been started and after it has timed-out. - * @tmf: This parameter specifies the TMF in progress. - * - * - */ -static void isci_abort_task_process_cb( - enum isci_tmf_cb_state cb_state, - struct isci_tmf *tmf, - void *cb_data) -{ - struct isci_request *old_request; - - old_request = (struct isci_request *)cb_data; - - dev_dbg(&old_request->isci_host->pdev->dev, - "%s: tmf=%p, old_request=%p\n", - __func__, tmf, old_request); - - switch (cb_state) { - - case isci_tmf_started: - /* The TMF has been started. Nothing to do here, since the - * request state was already set to "aborted" by the abort - * task function. - */ - if ((old_request->status != aborted) - && (old_request->status != completed)) - dev_dbg(&old_request->isci_host->pdev->dev, - "%s: Bad request status (%d): tmf=%p, old_request=%p\n", - __func__, old_request->status, tmf, old_request); - break; - - case isci_tmf_timed_out: - - /* Set the task's state to "aborting", since the abort task - * function thread set it to "aborted" (above) in anticipation - * of the task management request working correctly. Since the - * timeout has now fired, the TMF request failed. We set the - * state such that the request completion will indicate the - * device is no longer present. - */ - isci_request_change_state(old_request, aborting); - break; - - default: - dev_dbg(&old_request->isci_host->pdev->dev, - "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n", - __func__, cb_state, tmf, old_request); - break; - } -} - -/** * isci_task_abort_task() - This function is one of the SAS Domain Template * functions. This function is called by libsas to abort a specified task. * @task: This parameter specifies the SAS task to abort. @@ -947,22 +484,20 @@ static void isci_abort_task_process_cb( */ int isci_task_abort_task(struct sas_task *task) { - struct isci_host *isci_host = dev_to_ihost(task->dev); + struct isci_host *ihost = dev_to_ihost(task->dev); DECLARE_COMPLETION_ONSTACK(aborted_io_completion); struct isci_request *old_request = NULL; - enum isci_request_status old_state; - struct isci_remote_device *isci_device = NULL; + struct isci_remote_device *idev = NULL; struct isci_tmf tmf; int ret = TMF_RESP_FUNC_FAILED; unsigned long flags; - int perform_termination = 0; /* Get the isci_request reference from the task. Note that * this check does not depend on the pending request list * in the device, because tasks driving resets may land here * after completion in the core. */ - spin_lock_irqsave(&isci_host->scic_lock, flags); + spin_lock_irqsave(&ihost->scic_lock, flags); spin_lock(&task->task_state_lock); old_request = task->lldd_task; @@ -971,20 +506,29 @@ int isci_task_abort_task(struct sas_task *task) if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && (task->task_state_flags & SAS_TASK_AT_INITIATOR) && old_request) - isci_device = isci_lookup_device(task->dev); + idev = isci_get_device(task->dev->lldd_dev); spin_unlock(&task->task_state_lock); - spin_unlock_irqrestore(&isci_host->scic_lock, flags); + spin_unlock_irqrestore(&ihost->scic_lock, flags); - dev_dbg(&isci_host->pdev->dev, - "%s: dev = %p, task = %p, old_request == %p\n", - __func__, isci_device, task, old_request); + dev_warn(&ihost->pdev->dev, + "%s: dev = %p (%s%s), task = %p, old_request == %p\n", + __func__, idev, + (dev_is_sata(task->dev) ? "STP/SATA" + : ((dev_is_expander(task->dev)) + ? "SMP" + : "SSP")), + ((idev) ? ((test_bit(IDEV_GONE, &idev->flags)) + ? " IDEV_GONE" + : "") + : " <NULL>"), + task, old_request); /* Device reset conditions signalled in task_state_flags are the * responsbility of libsas to observe at the start of the error * handler thread. */ - if (!isci_device || !old_request) { + if (!idev || !old_request) { /* The request has already completed and there * is nothing to do here other than to set the task * done bit, and indicate that the task abort function @@ -998,108 +542,72 @@ int isci_task_abort_task(struct sas_task *task) ret = TMF_RESP_FUNC_COMPLETE; - dev_dbg(&isci_host->pdev->dev, - "%s: abort task not needed for %p\n", - __func__, task); + dev_warn(&ihost->pdev->dev, + "%s: abort task not needed for %p\n", + __func__, task); goto out; } - - spin_lock_irqsave(&isci_host->scic_lock, flags); - - /* Check the request status and change to "aborted" if currently - * "starting"; if true then set the I/O kernel completion - * struct that will be triggered when the request completes. - */ - old_state = isci_task_validate_request_to_abort( - old_request, isci_host, isci_device, - &aborted_io_completion); - if ((old_state != started) && - (old_state != completed) && - (old_state != aborting)) { - - spin_unlock_irqrestore(&isci_host->scic_lock, flags); - - /* The request was already being handled by someone else (because - * they got to set the state away from started). - */ - dev_dbg(&isci_host->pdev->dev, - "%s: device = %p; old_request %p already being aborted\n", - __func__, - isci_device, old_request); - ret = TMF_RESP_FUNC_COMPLETE; + /* Suspend the RNC, kill the TC */ + if (isci_remote_device_suspend_terminate(ihost, idev, old_request) + != SCI_SUCCESS) { + dev_warn(&ihost->pdev->dev, + "%s: isci_remote_device_reset_terminate(dev=%p, " + "req=%p, task=%p) failed\n", + __func__, idev, old_request, task); + ret = TMF_RESP_FUNC_FAILED; goto out; } + spin_lock_irqsave(&ihost->scic_lock, flags); + if (task->task_proto == SAS_PROTOCOL_SMP || sas_protocol_ata(task->task_proto) || - test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)) { + test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags) || + test_bit(IDEV_GONE, &idev->flags)) { - spin_unlock_irqrestore(&isci_host->scic_lock, flags); + spin_unlock_irqrestore(&ihost->scic_lock, flags); - dev_dbg(&isci_host->pdev->dev, - "%s: %s request" - " or complete_in_target (%d), thus no TMF\n", - __func__, - ((task->task_proto == SAS_PROTOCOL_SMP) - ? "SMP" - : (sas_protocol_ata(task->task_proto) - ? "SATA/STP" - : "<other>") - ), - test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)); - - if (test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)) { - spin_lock_irqsave(&task->task_state_lock, flags); - task->task_state_flags |= SAS_TASK_STATE_DONE; - task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR | - SAS_TASK_STATE_PENDING); - spin_unlock_irqrestore(&task->task_state_lock, flags); - ret = TMF_RESP_FUNC_COMPLETE; - } else { - spin_lock_irqsave(&task->task_state_lock, flags); - task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR | - SAS_TASK_STATE_PENDING); - spin_unlock_irqrestore(&task->task_state_lock, flags); - } + /* No task to send, so explicitly resume the device here */ + isci_remote_device_resume_from_abort(ihost, idev); - /* STP and SMP devices are not sent a TMF, but the - * outstanding I/O request is terminated below. This is - * because SATA/STP and SMP discovery path timeouts directly - * call the abort task interface for cleanup. - */ - perform_termination = 1; + dev_warn(&ihost->pdev->dev, + "%s: %s request" + " or complete_in_target (%d), " + "or IDEV_GONE (%d), thus no TMF\n", + __func__, + ((task->task_proto == SAS_PROTOCOL_SMP) + ? "SMP" + : (sas_protocol_ata(task->task_proto) + ? "SATA/STP" + : "<other>") + ), + test_bit(IREQ_COMPLETE_IN_TARGET, + &old_request->flags), + test_bit(IDEV_GONE, &idev->flags)); + + spin_lock_irqsave(&task->task_state_lock, flags); + task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR | + SAS_TASK_STATE_PENDING); + task->task_state_flags |= SAS_TASK_STATE_DONE; + spin_unlock_irqrestore(&task->task_state_lock, flags); + ret = TMF_RESP_FUNC_COMPLETE; } else { /* Fill in the tmf stucture */ isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort, - isci_abort_task_process_cb, old_request); - spin_unlock_irqrestore(&isci_host->scic_lock, flags); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + /* Send the task management request. */ #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* 1/2 second timeout */ - ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, + ret = isci_task_execute_tmf(ihost, idev, &tmf, ISCI_ABORT_TASK_TIMEOUT_MS); - - if (ret == TMF_RESP_FUNC_COMPLETE) - perform_termination = 1; - else - dev_dbg(&isci_host->pdev->dev, - "%s: isci_task_send_tmf failed\n", __func__); } - if (perform_termination) { - set_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags); - - /* Clean up the request on our side, and wait for the aborted - * I/O to complete. - */ - isci_terminate_request_core(isci_host, isci_device, - old_request); - } - - /* Make sure we do not leave a reference to aborted_io_completion */ - old_request->io_request_completion = NULL; - out: - isci_put_device(isci_device); +out: + dev_warn(&ihost->pdev->dev, + "%s: Done; dev = %p, task = %p , old_request == %p\n", + __func__, idev, task, old_request); + isci_put_device(idev); return ret; } @@ -1195,14 +703,11 @@ isci_task_request_complete(struct isci_host *ihost, { struct isci_tmf *tmf = isci_request_access_tmf(ireq); struct completion *tmf_complete = NULL; - struct completion *request_complete = ireq->io_request_completion; dev_dbg(&ihost->pdev->dev, "%s: request = %p, status=%d\n", __func__, ireq, completion_status); - isci_request_change_state(ireq, completed); - set_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags); if (tmf) { @@ -1226,20 +731,11 @@ isci_task_request_complete(struct isci_host *ihost, */ set_bit(IREQ_TERMINATED, &ireq->flags); - /* As soon as something is in the terminate path, deallocation is - * managed there. Note that the final non-managed state of a task - * request is "completed". - */ - if ((ireq->status == completed) || - !isci_request_is_dealloc_managed(ireq->status)) { - isci_request_change_state(ireq, unallocated); - isci_free_tag(ihost, ireq->io_tag); - list_del_init(&ireq->dev_node); - } + if (test_and_clear_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags)) + wake_up_all(&ihost->eventq); - /* "request_complete" is set if the task was being terminated. */ - if (request_complete) - complete(request_complete); + if (!test_bit(IREQ_NO_AUTO_FREE_TAG, &ireq->flags)) + isci_free_tag(ihost, ireq->io_tag); /* The task management part completes last. */ if (tmf_complete) @@ -1250,48 +746,38 @@ static int isci_reset_device(struct isci_host *ihost, struct domain_device *dev, struct isci_remote_device *idev) { - int rc; - unsigned long flags; - enum sci_status status; + int rc = TMF_RESP_FUNC_COMPLETE, reset_stat = -1; struct sas_phy *phy = sas_get_local_phy(dev); struct isci_port *iport = dev->port->lldd_port; dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev); - spin_lock_irqsave(&ihost->scic_lock, flags); - status = sci_remote_device_reset(idev); - spin_unlock_irqrestore(&ihost->scic_lock, flags); - - if (status != SCI_SUCCESS) { - dev_dbg(&ihost->pdev->dev, - "%s: sci_remote_device_reset(%p) returned %d!\n", - __func__, idev, status); + /* Suspend the RNC, terminate all outstanding TCs. */ + if (isci_remote_device_suspend_terminate(ihost, idev, NULL) + != SCI_SUCCESS) { rc = TMF_RESP_FUNC_FAILED; goto out; } - - if (scsi_is_sas_phy_local(phy)) { - struct isci_phy *iphy = &ihost->phys[phy->number]; - - rc = isci_port_perform_hard_reset(ihost, iport, iphy); - } else - rc = sas_phy_reset(phy, !dev_is_sata(dev)); - - /* Terminate in-progress I/O now. */ - isci_remote_device_nuke_requests(ihost, idev); - - /* Since all pending TCs have been cleaned, resume the RNC. */ - spin_lock_irqsave(&ihost->scic_lock, flags); - status = sci_remote_device_reset_complete(idev); - spin_unlock_irqrestore(&ihost->scic_lock, flags); - - if (status != SCI_SUCCESS) { - dev_dbg(&ihost->pdev->dev, - "%s: sci_remote_device_reset_complete(%p) " - "returned %d!\n", __func__, idev, status); + /* Note that since the termination for outstanding requests succeeded, + * this function will return success. This is because the resets will + * only fail if the device has been removed (ie. hotplug), and the + * primary duty of this function is to cleanup tasks, so that is the + * relevant status. + */ + if (!test_bit(IDEV_GONE, &idev->flags)) { + if (scsi_is_sas_phy_local(phy)) { + struct isci_phy *iphy = &ihost->phys[phy->number]; + + reset_stat = isci_port_perform_hard_reset(ihost, iport, + iphy); + } else + reset_stat = sas_phy_reset(phy, !dev_is_sata(dev)); } + /* Explicitly resume the RNC here, since there was no task sent. */ + isci_remote_device_resume_from_abort(ihost, idev); - dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev); + dev_dbg(&ihost->pdev->dev, "%s: idev %p complete, reset_stat=%d.\n", + __func__, idev, reset_stat); out: sas_put_local_phy(phy); return rc; @@ -1305,7 +791,7 @@ int isci_task_I_T_nexus_reset(struct domain_device *dev) int ret; spin_lock_irqsave(&ihost->scic_lock, flags); - idev = isci_lookup_device(dev); + idev = isci_get_device(dev->lldd_dev); spin_unlock_irqrestore(&ihost->scic_lock, flags); if (!idev) { |