37  * drm_sched_entity_init - Init a context entity used by scheduler when
40  * @entity: scheduler entity to init
41  * @priority: priority of the entity
43  *           entity can be submitted
49  *       the entity
53 int drm_sched_entity_init(struct drm_sched_entity *entity,  in drm_sched_entity_init()  argument
59 	if (!(entity && sched_list && (num_sched_list == 0 || sched_list[0])))  in drm_sched_entity_init()
62 	memset(entity, 0, sizeof(struct drm_sched_entity));  in drm_sched_entity_init()
63 	INIT_LIST_HEAD(&entity->list);  in drm_sched_entity_init()
64 	entity->rq = NULL;  in drm_sched_entity_init()
65 	entity->guilty = guilty;  in drm_sched_entity_init()
66 	entity->num_sched_list = num_sched_list;  in drm_sched_entity_init()
67 	entity->priority = priority;  in drm_sched_entity_init()
68 	entity->sched_list = num_sched_list > 1 ? sched_list : NULL;  in drm_sched_entity_init()
69 	entity->last_scheduled = NULL;  in drm_sched_entity_init()
72 		entity->rq = &sched_list[0]->sched_rq[entity->priority];  in drm_sched_entity_init()
74 	init_completion(&entity->entity_idle);  in drm_sched_entity_init()
77 	complete(&entity->entity_idle);  in drm_sched_entity_init()
79 	spin_lock_init(&entity->rq_lock);  in drm_sched_entity_init()
80 	spsc_queue_init(&entity->job_queue);  in drm_sched_entity_init()
82 	atomic_set(&entity->fence_seq, 0);  in drm_sched_entity_init()
83 	entity->fence_context = dma_fence_context_alloc(2);  in drm_sched_entity_init()
90  * drm_sched_entity_modify_sched - Modify sched of an entity
91  * @entity: scheduler entity to init
93  *		 existing entity->sched_list
96 void drm_sched_entity_modify_sched(struct drm_sched_entity *entity,  in drm_sched_entity_modify_sched()  argument
102 	entity->sched_list = sched_list;  in drm_sched_entity_modify_sched()
103 	entity->num_sched_list = num_sched_list;  in drm_sched_entity_modify_sched()
108  * drm_sched_entity_is_idle - Check if entity is idle
110  * @entity: scheduler entity
112  * Returns true if the entity does not have any unscheduled jobs.
114 static bool drm_sched_entity_is_idle(struct drm_sched_entity *entity)  in drm_sched_entity_is_idle()  argument
118 	if (list_empty(&entity->list) ||  in drm_sched_entity_is_idle()
119 	    spsc_queue_count(&entity->job_queue) == 0 ||  in drm_sched_entity_is_idle()
120 	    entity->stopped)  in drm_sched_entity_is_idle()
127  * drm_sched_entity_is_ready - Check if entity is ready
129  * @entity: scheduler entity
131  * Return true if entity could provide a job.
133 bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)  in drm_sched_entity_is_ready()  argument
135 	if (spsc_queue_peek(&entity->job_queue) == NULL)  in drm_sched_entity_is_ready()
138 	if (READ_ONCE(entity->dependency))  in drm_sched_entity_is_ready()
145  * drm_sched_entity_flush - Flush a context entity
147  * @entity: scheduler entity
151  * waiting, removes the entity from the runqueue and returns an error when the
156 long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)  in drm_sched_entity_flush()  argument
162 	if (!entity->rq)  in drm_sched_entity_flush()
165 	sched = entity->rq->sched;  in drm_sched_entity_flush()
174 					drm_sched_entity_is_idle(entity),  in drm_sched_entity_flush()
178 				    drm_sched_entity_is_idle(entity));  in drm_sched_entity_flush()
182 	last_user = cmpxchg(&entity->last_user, current->group_leader, NULL);  in drm_sched_entity_flush()
185 		spin_lock(&entity->rq_lock);  in drm_sched_entity_flush()
186 		entity->stopped = true;  in drm_sched_entity_flush()
187 		drm_sched_rq_remove_entity(entity->rq, entity);  in drm_sched_entity_flush()
188 		spin_unlock(&entity->rq_lock);  in drm_sched_entity_flush()
201  * Signal the scheduler finished fence when the entity in question is killed.
217  * @entity: entity which is cleaned up
219  * Makes sure that all remaining jobs in an entity are killed before it is
222 static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)  in drm_sched_entity_kill_jobs()  argument
228 	while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {  in drm_sched_entity_kill_jobs()
232 		while ((f = job->sched->ops->dependency(job, entity)))  in drm_sched_entity_kill_jobs()
239 		 * When pipe is hanged by older entity, new entity might  in drm_sched_entity_kill_jobs()
241 		 * and so entity->last_scheduled will remain NULL  in drm_sched_entity_kill_jobs()
243 		if (!entity->last_scheduled) {  in drm_sched_entity_kill_jobs()
248 		r = dma_fence_add_callback(entity->last_scheduled,  in drm_sched_entity_kill_jobs()
259  * drm_sched_entity_fini - Destroy a context entity
261  * @entity: scheduler entity
264  * entity and signals all jobs with an error code if the process was killed.
267 void drm_sched_entity_fini(struct drm_sched_entity *entity)  in drm_sched_entity_fini()  argument
271 	if (entity->rq) {  in drm_sched_entity_fini()
272 		sched = entity->rq->sched;  in drm_sched_entity_fini()
273 		drm_sched_rq_remove_entity(entity->rq, entity);  in drm_sched_entity_fini()
279 	if (spsc_queue_count(&entity->job_queue)) {  in drm_sched_entity_fini()
283 			 * this entity.  in drm_sched_entity_fini()
285 			wait_for_completion(&entity->entity_idle);  in drm_sched_entity_fini()
288 		if (entity->dependency) {  in drm_sched_entity_fini()
289 			dma_fence_remove_callback(entity->dependency,  in drm_sched_entity_fini()
290 						  &entity->cb);  in drm_sched_entity_fini()
291 			dma_fence_put(entity->dependency);  in drm_sched_entity_fini()
292 			entity->dependency = NULL;  in drm_sched_entity_fini()
295 		drm_sched_entity_kill_jobs(entity);  in drm_sched_entity_fini()
298 	dma_fence_put(entity->last_scheduled);  in drm_sched_entity_fini()
299 	entity->last_scheduled = NULL;  in drm_sched_entity_fini()
304  * drm_sched_entity_destroy - Destroy a context entity
306  * @entity: scheduler entity
310 void drm_sched_entity_destroy(struct drm_sched_entity *entity)  in drm_sched_entity_destroy()  argument
312 	drm_sched_entity_flush(entity, MAX_WAIT_SCHED_ENTITY_Q_EMPTY);  in drm_sched_entity_destroy()
313 	drm_sched_entity_fini(entity);  in drm_sched_entity_destroy()
323 	struct drm_sched_entity *entity =  in drm_sched_entity_clear_dep()  local
326 	entity->dependency = NULL;  in drm_sched_entity_clear_dep()
337 	struct drm_sched_entity *entity =  in drm_sched_entity_wakeup()  local
341 	drm_sched_wakeup(entity->rq->sched);  in drm_sched_entity_wakeup()
345  * drm_sched_entity_set_priority - Sets priority of the entity
347  * @entity: scheduler entity
350  * Update the priority of runqueus used for the entity.
352 void drm_sched_entity_set_priority(struct drm_sched_entity *entity,  in drm_sched_entity_set_priority()  argument
355 	spin_lock(&entity->rq_lock);  in drm_sched_entity_set_priority()
356 	entity->priority = priority;  in drm_sched_entity_set_priority()
357 	spin_unlock(&entity->rq_lock);  in drm_sched_entity_set_priority()
364  * @entity: entity with dependency
366  * Add a callback to the current dependency of the entity to wake up the
367  * scheduler when the entity becomes available.
369 static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)  in drm_sched_entity_add_dependency_cb()  argument
371 	struct drm_gpu_scheduler *sched = entity->rq->sched;  in drm_sched_entity_add_dependency_cb()
372 	struct dma_fence *fence = entity->dependency;  in drm_sched_entity_add_dependency_cb()
375 	if (fence->context == entity->fence_context ||  in drm_sched_entity_add_dependency_cb()
376 	    fence->context == entity->fence_context + 1) {  in drm_sched_entity_add_dependency_cb()
379 		 * which belongs to the same entity, we can ignore  in drm_sched_entity_add_dependency_cb()
382 		dma_fence_put(entity->dependency);  in drm_sched_entity_add_dependency_cb()
394 		dma_fence_put(entity->dependency);  in drm_sched_entity_add_dependency_cb()
395 		entity->dependency = fence;  in drm_sched_entity_add_dependency_cb()
396 		if (!dma_fence_add_callback(fence, &entity->cb,  in drm_sched_entity_add_dependency_cb()
405 	if (!dma_fence_add_callback(entity->dependency, &entity->cb,  in drm_sched_entity_add_dependency_cb()
409 	dma_fence_put(entity->dependency);  in drm_sched_entity_add_dependency_cb()
414  * drm_sched_entity_pop_job - get a ready to be scheduled job from the entity
416  * @entity: entity to get the job from
420 struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)  in drm_sched_entity_pop_job()  argument
422 	struct drm_gpu_scheduler *sched = entity->rq->sched;  in drm_sched_entity_pop_job()
425 	sched_job = to_drm_sched_job(spsc_queue_peek(&entity->job_queue));  in drm_sched_entity_pop_job()
429 	while ((entity->dependency =  in drm_sched_entity_pop_job()
430 			sched->ops->dependency(sched_job, entity))) {  in drm_sched_entity_pop_job()
431 		trace_drm_sched_job_wait_dep(sched_job, entity->dependency);  in drm_sched_entity_pop_job()
433 		if (drm_sched_entity_add_dependency_cb(entity))  in drm_sched_entity_pop_job()
437 	/* skip jobs from entity that marked guilty */  in drm_sched_entity_pop_job()
438 	if (entity->guilty && atomic_read(entity->guilty))  in drm_sched_entity_pop_job()
441 	dma_fence_put(entity->last_scheduled);  in drm_sched_entity_pop_job()
442 	entity->last_scheduled = dma_fence_get(&sched_job->s_fence->finished);  in drm_sched_entity_pop_job()
444 	spsc_queue_pop(&entity->job_queue);  in drm_sched_entity_pop_job()
449  * drm_sched_entity_select_rq - select a new rq for the entity
451  * @entity: scheduler entity
453  * Check all prerequisites and select a new rq for the entity for load
456 void drm_sched_entity_select_rq(struct drm_sched_entity *entity)  in drm_sched_entity_select_rq()  argument
462 	if (spsc_queue_count(&entity->job_queue) || !entity->sched_list)  in drm_sched_entity_select_rq()
465 	fence = READ_ONCE(entity->last_scheduled);  in drm_sched_entity_select_rq()
469 	spin_lock(&entity->rq_lock);  in drm_sched_entity_select_rq()
470 	sched = drm_sched_pick_best(entity->sched_list, entity->num_sched_list);  in drm_sched_entity_select_rq()
471 	rq = sched ? &sched->sched_rq[entity->priority] : NULL;  in drm_sched_entity_select_rq()
472 	if (rq != entity->rq) {  in drm_sched_entity_select_rq()
473 		drm_sched_rq_remove_entity(entity->rq, entity);  in drm_sched_entity_select_rq()
474 		entity->rq = rq;  in drm_sched_entity_select_rq()
476 	spin_unlock(&entity->rq_lock);  in drm_sched_entity_select_rq()
478 	if (entity->num_sched_list == 1)  in drm_sched_entity_select_rq()
479 		entity->sched_list = NULL;  in drm_sched_entity_select_rq()
483  * drm_sched_entity_push_job - Submit a job to the entity's job queue
486  * @entity: scheduler entity
495 			       struct drm_sched_entity *entity)  in drm_sched_entity_push_job()  argument
499 	trace_drm_sched_job(sched_job, entity);  in drm_sched_entity_push_job()
500 	atomic_inc(entity->rq->sched->score);  in drm_sched_entity_push_job()
501 	WRITE_ONCE(entity->last_user, current->group_leader);  in drm_sched_entity_push_job()
502 	first = spsc_queue_push(&entity->job_queue, &sched_job->queue_node);  in drm_sched_entity_push_job()
506 		/* Add the entity to the run queue */  in drm_sched_entity_push_job()
507 		spin_lock(&entity->rq_lock);  in drm_sched_entity_push_job()
508 		if (entity->stopped) {  in drm_sched_entity_push_job()
509 			spin_unlock(&entity->rq_lock);  in drm_sched_entity_push_job()
511 			DRM_ERROR("Trying to push to a killed entity\n");  in drm_sched_entity_push_job()
514 		drm_sched_rq_add_entity(entity->rq, entity);  in drm_sched_entity_push_job()
515 		spin_unlock(&entity->rq_lock);  in drm_sched_entity_push_job()
516 		drm_sched_wakeup(entity->rq->sched);  in drm_sched_entity_push_job()