drm/amdgpu: add amd_sched_next_queued_seq function

This function is used to get the next queued sequence number
Signed-off-by: NJammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -310,7 +310,7 @@ struct fence *amdgpu_ctx_get_fence(struct amdgpu_ctx *ctx,
 
 	spin_lock(&ctx->ring_lock);
 	if (amdgpu_enable_scheduler)
-		queued_seq = atomic64_read(&cring->c_entity.last_queued_v_seq) + 1;
+		queued_seq = amd_sched_next_queued_seq(&cring->c_entity);
 	else
 		queued_seq = cring->sequence;
 

drivers/gpu/drm/amd/scheduler/gpu_scheduler.c

@@ -507,3 +507,15 @@ void amd_sched_emit(struct amd_context_entity *c_entity, uint64_t seq)
 	atomic64_set(&c_entity->last_emitted_v_seq, seq);
 	wake_up_all(&c_entity->wait_emit);
 }
+
+/**
+ * Get next queued sequence number
+ *
+ * @entity The context entity
+ *
+ * return the next queued sequence number
+*/
+uint64_t amd_sched_next_queued_seq(struct amd_context_entity *c_entity)
+{
+	return atomic64_read(&c_entity->last_queued_v_seq) + 1;
+}

drivers/gpu/drm/amd/scheduler/gpu_scheduler.h

@@ -153,4 +153,6 @@ int amd_context_entity_init(struct amd_gpu_scheduler *sched,
 
 void amd_sched_emit(struct amd_context_entity *c_entity, uint64_t seq);
 
+uint64_t amd_sched_next_queued_seq(struct amd_context_entity *c_entity);
+
 #endif