[PATCH 10/18] drm/amd: add last fence in sched entity

[Chunming Zhou <David1.Zhou-5C7GfCeVMHo@public.gmane.org>]

Change-Id: I68f67da25c482ac9dbd26e186cb953a539555a74
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
---
 drivers/gpu/drm/amd/scheduler/gpu_scheduler.c | 9 +++++++--
 drivers/gpu/drm/amd/scheduler/gpu_scheduler.h | 1 +
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
index f96aa82..5dab231 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
@@ -134,6 +134,7 @@ int amd_sched_entity_init(struct amd_gpu_scheduler *sched,
 	INIT_LIST_HEAD(&entity->list);
 	entity->rq = rq;
 	entity->sched = sched;
+	entity->last_fence = NULL;
 
 	spin_lock_init(&entity->queue_lock);
 	r = kfifo_alloc(&entity->job_queue, jobs * sizeof(void *), GFP_KERNEL);
@@ -219,6 +220,7 @@ void amd_sched_entity_fini(struct amd_gpu_scheduler *sched,
 
 	amd_sched_rq_remove_entity(rq, entity);
 	kfifo_free(&entity->job_queue);
+	fence_put(entity->last_fence);
 }
 
 static void amd_sched_entity_wakeup(struct fence *f, struct fence_cb *cb)
@@ -304,6 +306,7 @@ static bool amd_sched_entity_in(struct amd_sched_job *sched_job)
 {
 	struct amd_gpu_scheduler *sched = sched_job->sched;
 	struct amd_sched_entity *entity = sched_job->s_entity;
+	struct amd_sched_fence *s_fence = sched_job->s_fence;
 	bool added, first = false;
 
 	spin_lock(&entity->queue_lock);
@@ -312,9 +315,11 @@ static bool amd_sched_entity_in(struct amd_sched_job *sched_job)
 
 	if (added && kfifo_len(&entity->job_queue) == sizeof(sched_job))
 		first = true;
-
+	if (added) {
+		fence_put(entity->last_fence);
+		entity->last_fence = fence_get(&s_fence->finished);
+	}
 	spin_unlock(&entity->queue_lock);
-
 	/* first job wakes up scheduler */
 	if (first) {
 		/* Add the entity to the run queue */
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
index 7cbbbfb..256a851 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
@@ -49,6 +49,7 @@ struct amd_sched_entity {
 
 	atomic_t			fence_seq;
 	uint64_t                        fence_context;
+	struct fence                    *last_fence;
 
 	struct fence			*dependency;
 	struct fence_cb			cb;
-- 
1.9.1

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