64 #include "task.h"
71 * @task: request to complete
72 * @response: response code for the completed task.
73 * @status: status code for the completed task.
76 static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,  in isci_task_refuse()  argument
84 	dev_dbg(&ihost->pdev->dev, "%s: task = %p, response=%d, status=%d\n",  in isci_task_refuse()
85 		__func__, task, response, status);  in isci_task_refuse()
87 	spin_lock_irqsave(&task->task_state_lock, flags);  in isci_task_refuse()
89 	task->task_status.resp = response;  in isci_task_refuse()
90 	task->task_status.stat = status;  in isci_task_refuse()
93 	task->task_state_flags |= SAS_TASK_STATE_DONE;  in isci_task_refuse()
94 	task->task_state_flags &= ~SAS_TASK_STATE_PENDING;  in isci_task_refuse()
95 	task->lldd_task = NULL;  in isci_task_refuse()
96 	spin_unlock_irqrestore(&task->task_state_lock, flags);  in isci_task_refuse()
98 	task->task_done(task);  in isci_task_refuse()
101 #define for_each_sas_task(num, task) \  argument
103 	     task = list_entry(task->list.next, struct sas_task, list))
107 				       struct sas_task *task)  in isci_device_io_ready()  argument
111 		       isci_task_is_ncq_recovery(task))  in isci_device_io_ready()
116  *    functions. This function is called by libsas to send a task down to
118  * @task: This parameter specifies the SAS task to send.
123 int isci_task_execute_task(struct sas_task *task, gfp_t gfp_flags)  in isci_task_execute_task()  argument
125 	struct isci_host *ihost = dev_to_ihost(task->dev);  in isci_task_execute_task()
133 	idev = isci_lookup_device(task->dev);  in isci_task_execute_task()
134 	io_ready = isci_device_io_ready(idev, task);  in isci_task_execute_task()
139 		"task: %p, dev: %p idev: %p:%#lx cmd = %p\n",  in isci_task_execute_task()
140 		task, task->dev, idev, idev ? idev->flags : 0,  in isci_task_execute_task()
141 		task->uldd_task);  in isci_task_execute_task()
144 		isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED,  in isci_task_execute_task()
150 		isci_task_refuse(ihost, task, SAS_TASK_COMPLETE,  in isci_task_execute_task()
154 		spin_lock_irqsave(&task->task_state_lock, flags);  in isci_task_execute_task()
156 		if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {  in isci_task_execute_task()
158 			spin_unlock_irqrestore(&task->task_state_lock, flags);  in isci_task_execute_task()
160 			isci_task_refuse(ihost, task,  in isci_task_execute_task()
167 			ireq = isci_io_request_from_tag(ihost, task, tag);  in isci_task_execute_task()
168 			spin_unlock_irqrestore(&task->task_state_lock, flags);  in isci_task_execute_task()
172 			status = isci_request_execute(ihost, idev, task, ireq);  in isci_task_execute_task()
179 					isci_task_refuse(ihost, task,  in isci_task_execute_task()
191 					isci_task_refuse(ihost, task,  in isci_task_execute_task()
243 	/* XXX convert to get this from task->tproto like other drivers */  in isci_task_request_build()
445 			/* Send the task management part of the reset. */  in isci_task_lu_reset()
467 /* Task Management Functions. Must be called from process context.	 */
471  *    functions. This function is called by libsas to abort a specified task.
472  * @task: This parameter specifies the SAS task to abort.
476 int isci_task_abort_task(struct sas_task *task)  in isci_task_abort_task()  argument
478 	struct isci_host *ihost = dev_to_ihost(task->dev);  in isci_task_abort_task()
487 	/* Get the isci_request reference from the task.  Note that  in isci_task_abort_task()
493 	spin_lock(&task->task_state_lock);  in isci_task_abort_task()
495 	old_request = task->lldd_task;  in isci_task_abort_task()
497 	/* If task is already done, the request isn't valid */  in isci_task_abort_task()
498 	if (!(task->task_state_flags & SAS_TASK_STATE_DONE) &&  in isci_task_abort_task()
500 		idev = isci_get_device(task->dev->lldd_dev);  in isci_task_abort_task()
504 	spin_unlock(&task->task_state_lock);  in isci_task_abort_task()
508 		 "%s: dev = %p (%s%s), task = %p, old_request == %p\n",  in isci_task_abort_task()
510 		 (dev_is_sata(task->dev) ? "STP/SATA"  in isci_task_abort_task()
511 					 : ((dev_is_expander(task->dev->dev_type))  in isci_task_abort_task()
518 		 task, old_request);  in isci_task_abort_task()
526 		* is nothing to do here other than to set the task  in isci_task_abort_task()
527 		* done bit, and indicate that the task abort function  in isci_task_abort_task()
530 		spin_lock_irqsave(&task->task_state_lock, flags);  in isci_task_abort_task()
531 		task->task_state_flags |= SAS_TASK_STATE_DONE;  in isci_task_abort_task()
532 		task->task_state_flags &= ~SAS_TASK_STATE_PENDING;  in isci_task_abort_task()
533 		spin_unlock_irqrestore(&task->task_state_lock, flags);  in isci_task_abort_task()
538 			 "%s: abort task not needed for %p\n",  in isci_task_abort_task()
539 			 __func__, task);  in isci_task_abort_task()
547 				 "req=%p, task=%p) failed\n",  in isci_task_abort_task()
548 			 __func__, idev, old_request, task);  in isci_task_abort_task()
554 	if (task->task_proto == SAS_PROTOCOL_SMP ||  in isci_task_abort_task()
555 	    sas_protocol_ata(task->task_proto) ||  in isci_task_abort_task()
561 		/* No task to send, so explicitly resume the device here */  in isci_task_abort_task()
569 			 ((task->task_proto == SAS_PROTOCOL_SMP)  in isci_task_abort_task()
571 			  : (sas_protocol_ata(task->task_proto)  in isci_task_abort_task()
579 		spin_lock_irqsave(&task->task_state_lock, flags);  in isci_task_abort_task()
580 		task->task_state_flags &= ~SAS_TASK_STATE_PENDING;  in isci_task_abort_task()
581 		task->task_state_flags |= SAS_TASK_STATE_DONE;  in isci_task_abort_task()
582 		spin_unlock_irqrestore(&task->task_state_lock, flags);  in isci_task_abort_task()
592 		/* Send the task management request. */  in isci_task_abort_task()
599 		 "%s: Done; dev = %p, task = %p , old_request == %p\n",  in isci_task_abort_task()
600 		 __func__, idev, task, old_request);  in isci_task_abort_task()
607  *    functions. This is one of the Task Management functoins called by libsas,
608  *    to abort all task for the given lun.
625  *    functions. This is one of the Task Management functoins called by libsas.
644  *    all return codes from the abort task call).  When TMF_RESP_FUNC_SUCC is
647  * @task: This parameter specifies the sas task being queried.
652 	struct sas_task *task)  in isci_task_query_task()  argument
655 	if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET)  in isci_task_query_task()
663  *    an task request completes.
697 		/* PRINT_TMF( ((struct isci_tmf *)request->task)); */  in isci_task_request_complete()
712 	/* The task management part completes last. */  in isci_task_request_complete()
748 	/* Explicitly resume the RNC here, since there was no task sent. */  in isci_reset_device()