drm/scheduler: properly forward fence errors

When a hw fence is signaled with an error properly forward that to the
finished fence.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230420115752.31470-1-christian.koenig@amd.com

drivers/gpu/drm/scheduler/sched_entity.c

@@ -144,7 +144,7 @@ static void drm_sched_entity_kill_jobs_work(struct work_struct *wrk)
 {
 	struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
 
-	drm_sched_fence_finished(job->s_fence);
+	drm_sched_fence_finished(job->s_fence, -ESRCH);
 	WARN_ON(job->s_fence->parent);
 	job->sched->ops->free_job(job);
 }
@@ -195,8 +195,6 @@ static void drm_sched_entity_kill(struct drm_sched_entity *entity)
 	while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
 		struct drm_sched_fence *s_fence = job->s_fence;
 
-		dma_fence_set_error(&s_fence->finished, -ESRCH);
-
 		dma_fence_get(&s_fence->finished);
 		if (!prev || dma_fence_add_callback(prev, &job->finish_cb,
 					   drm_sched_entity_kill_jobs_cb))

drivers/gpu/drm/scheduler/sched_fence.c

@@ -53,8 +53,10 @@ void drm_sched_fence_scheduled(struct drm_sched_fence *fence)
 	dma_fence_signal(&fence->scheduled);
 }
 
-void drm_sched_fence_finished(struct drm_sched_fence *fence)
+void drm_sched_fence_finished(struct drm_sched_fence *fence, int result)
 {
+	if (result)
+		dma_fence_set_error(&fence->finished, result);
 	dma_fence_signal(&fence->finished);
 }
 

drivers/gpu/drm/scheduler/sched_main.c

@@ -262,7 +262,7 @@ drm_sched_rq_select_entity_fifo(struct drm_sched_rq *rq)
  *
  * Finish the job's fence and wake up the worker thread.
  */
-static void drm_sched_job_done(struct drm_sched_job *s_job)
+static void drm_sched_job_done(struct drm_sched_job *s_job, int result)
 {
 	struct drm_sched_fence *s_fence = s_job->s_fence;
 	struct drm_gpu_scheduler *sched = s_fence->sched;
@@ -273,7 +273,7 @@ static void drm_sched_job_done(struct drm_sched_job *s_job)
 	trace_drm_sched_process_job(s_fence);
 
 	dma_fence_get(&s_fence->finished);
-	drm_sched_fence_finished(s_fence);
+	drm_sched_fence_finished(s_fence, result);
 	dma_fence_put(&s_fence->finished);
 	wake_up_interruptible(&sched->wake_up_worker);
 }
@@ -287,7 +287,7 @@ static void drm_sched_job_done_cb(struct dma_fence *f, struct dma_fence_cb *cb)
 {
 	struct drm_sched_job *s_job = container_of(cb, struct drm_sched_job, cb);
 
-	drm_sched_job_done(s_job);
+	drm_sched_job_done(s_job, f->error);
 }
 
 /**
@@ -537,12 +537,12 @@ void drm_sched_start(struct drm_gpu_scheduler *sched, bool full_recovery)
 			r = dma_fence_add_callback(fence, &s_job->cb,
 						   drm_sched_job_done_cb);
 			if (r == -ENOENT)
-				drm_sched_job_done(s_job);
+				drm_sched_job_done(s_job, fence->error);
 			else if (r)
 				DRM_DEV_ERROR(sched->dev, "fence add callback failed (%d)\n",
 					  r);
 		} else
-			drm_sched_job_done(s_job);
+			drm_sched_job_done(s_job, 0);
 	}
 
 	if (full_recovery) {
@@ -1059,15 +1059,13 @@ static int drm_sched_main(void *param)
 			r = dma_fence_add_callback(fence, &sched_job->cb,
 						   drm_sched_job_done_cb);
 			if (r == -ENOENT)
-				drm_sched_job_done(sched_job);
+				drm_sched_job_done(sched_job, fence->error);
 			else if (r)
 				DRM_DEV_ERROR(sched->dev, "fence add callback failed (%d)\n",
 					  r);
 		} else {
-			if (IS_ERR(fence))
-				dma_fence_set_error(&s_fence->finished, PTR_ERR(fence));
-
-			drm_sched_job_done(sched_job);
+			drm_sched_job_done(sched_job, IS_ERR(fence) ?
+					   PTR_ERR(fence) : 0);
 		}
 
 		wake_up(&sched->job_scheduled);

include/drm/gpu_scheduler.h

@@ -598,7 +598,7 @@ void drm_sched_fence_init(struct drm_sched_fence *fence,
 void drm_sched_fence_free(struct drm_sched_fence *fence);
 
 void drm_sched_fence_scheduled(struct drm_sched_fence *fence);
-void drm_sched_fence_finished(struct drm_sched_fence *fence);
+void drm_sched_fence_finished(struct drm_sched_fence *fence, int result);
 
 unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched);
 void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched,