drm/scheduler: remove sched field from the entity

The scheduler of the entity is decided by the run queue on which
it is queued. This patch avoids us the effort required to maintain
a sync between rq and sched field when we start shifting entites
among different rqs.

Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -1262,7 +1262,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 	priority = job->base.s_priority;
 	drm_sched_entity_push_job(&job->base, entity);
 
-	ring = to_amdgpu_ring(entity->sched);
+	ring = to_amdgpu_ring(entity->rq->sched);
 	amdgpu_ring_priority_get(ring, priority);
 
 	ttm_eu_fence_buffer_objects(&p->ticket, &p->validated, p->fence);

drivers/gpu/drm/amd/amdgpu/amdgpu_job.c

@@ -143,7 +143,7 @@ int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
 	priority = job->base.s_priority;
 	drm_sched_entity_push_job(&job->base, entity);
 
-	ring = to_amdgpu_ring(entity->sched);
+	ring = to_amdgpu_ring(entity->rq->sched);
 	amdgpu_ring_priority_get(ring, priority);
 
 	return 0;
@@ -167,7 +167,7 @@ int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
 static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
 					       struct drm_sched_entity *s_entity)
 {
-	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->sched);
+	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
 	struct amdgpu_vm *vm = job->vm;
 	struct dma_fence *fence;

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

@@ -387,7 +387,7 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
 		ats_entries = 0;
 	}
 
-	ring = container_of(vm->entity.sched, struct amdgpu_ring, sched);
+	ring = container_of(vm->entity.rq->sched, struct amdgpu_ring, sched);
 
 	r = reservation_object_reserve_shared(bo->tbo.resv);
 	if (r)
@@ -1113,7 +1113,7 @@ restart:
 		struct amdgpu_ring *ring;
 		struct dma_fence *fence;
 
-		ring = container_of(vm->entity.sched, struct amdgpu_ring,
+		ring = container_of(vm->entity.rq->sched, struct amdgpu_ring,
 				    sched);
 
 		amdgpu_ring_pad_ib(ring, params.ib);
@@ -1403,7 +1403,7 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 					   addr, flags);
 	}
 
-	ring = container_of(vm->entity.sched, struct amdgpu_ring, sched);
+	ring = container_of(vm->entity.rq->sched, struct amdgpu_ring, sched);
 
 	nptes = last - start + 1;
 

drivers/gpu/drm/scheduler/gpu_scheduler.c

@@ -185,7 +185,6 @@ int drm_sched_entity_init(struct drm_sched_entity *entity,
 	memset(entity, 0, sizeof(struct drm_sched_entity));
 	INIT_LIST_HEAD(&entity->list);
 	entity->rq = rq_list[0];
-	entity->sched = rq_list[0]->sched;
 	entity->guilty = guilty;
 	entity->last_scheduled = NULL;
 
@@ -210,8 +209,8 @@ EXPORT_SYMBOL(drm_sched_entity_init);
 static bool drm_sched_entity_is_initialized(struct drm_gpu_scheduler *sched,
 					    struct drm_sched_entity *entity)
 {
-	return entity->sched == sched &&
-		entity->rq != NULL;
+	return entity->rq != NULL &&
+		entity->rq->sched == sched;
 }
 
 /**
@@ -278,7 +277,7 @@ long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
 	struct drm_gpu_scheduler *sched;
 	long ret = timeout;
 
-	sched = entity->sched;
+	sched = entity->rq->sched;
 	if (!drm_sched_entity_is_initialized(sched, entity))
 		return ret;
 	/**
@@ -317,7 +316,7 @@ void drm_sched_entity_fini(struct drm_sched_entity *entity)
 {
 	struct drm_gpu_scheduler *sched;
 
-	sched = entity->sched;
+	sched = entity->rq->sched;
 	drm_sched_entity_set_rq(entity, NULL);
 
 	/* Consumption of existing IBs wasn't completed. Forcefully
@@ -388,7 +387,7 @@ static void drm_sched_entity_wakeup(struct dma_fence *f, struct dma_fence_cb *cb
 		container_of(cb, struct drm_sched_entity, cb);
 	entity->dependency = NULL;
 	dma_fence_put(f);
-	drm_sched_wakeup(entity->sched);
+	drm_sched_wakeup(entity->rq->sched);
 }
 
 static void drm_sched_entity_clear_dep(struct dma_fence *f, struct dma_fence_cb *cb)
@@ -438,7 +437,7 @@ EXPORT_SYMBOL(drm_sched_entity_set_rq);
 bool drm_sched_dependency_optimized(struct dma_fence* fence,
 				    struct drm_sched_entity *entity)
 {
-	struct drm_gpu_scheduler *sched = entity->sched;
+	struct drm_gpu_scheduler *sched = entity->rq->sched;
 	struct drm_sched_fence *s_fence;
 
 	if (!fence || dma_fence_is_signaled(fence))
@@ -455,7 +454,7 @@ EXPORT_SYMBOL(drm_sched_dependency_optimized);
 
 static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
 {
-	struct drm_gpu_scheduler *sched = entity->sched;
+	struct drm_gpu_scheduler *sched = entity->rq->sched;
 	struct dma_fence * fence = entity->dependency;
 	struct drm_sched_fence *s_fence;
 
@@ -500,7 +499,7 @@ static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
 static struct drm_sched_job *
 drm_sched_entity_pop_job(struct drm_sched_entity *entity)
 {
-	struct drm_gpu_scheduler *sched = entity->sched;
+	struct drm_gpu_scheduler *sched = entity->rq->sched;
 	struct drm_sched_job *sched_job = to_drm_sched_job(
 						spsc_queue_peek(&entity->job_queue));
 
@@ -744,7 +743,7 @@ int drm_sched_job_init(struct drm_sched_job *job,
 		       struct drm_sched_entity *entity,
 		       void *owner)
 {
-	struct drm_gpu_scheduler *sched = entity->sched;
+	struct drm_gpu_scheduler *sched = entity->rq->sched;
 
 	job->sched = sched;
 	job->entity = entity;

drivers/gpu/drm/scheduler/sched_fence.c

@@ -161,7 +161,7 @@ struct drm_sched_fence *drm_sched_fence_create(struct drm_sched_entity *entity,
 		return NULL;
 
 	fence->owner = owner;
-	fence->sched = entity->sched;
+	fence->sched = entity->rq->sched;
 	spin_lock_init(&fence->lock);
 
 	seq = atomic_inc_return(&entity->fence_seq);

include/drm/gpu_scheduler.h

@@ -52,7 +52,6 @@ enum drm_sched_priority {
  *        runqueue.
  * @rq: runqueue to which this entity belongs.
  * @rq_lock: lock to modify the runqueue to which this entity belongs.
- * @sched: the scheduler instance to which this entity is enqueued.
  * @job_queue: the list of jobs of this entity.
  * @fence_seq: a linearly increasing seqno incremented with each
  *             new &drm_sched_fence which is part of the entity.
@@ -76,7 +75,6 @@ struct drm_sched_entity {
 	struct list_head		list;
 	struct drm_sched_rq		*rq;
 	spinlock_t			rq_lock;
-	struct drm_gpu_scheduler	*sched;
 
 	struct spsc_queue		job_queue;