drm/amdgpu: move ring_from_fence to common code

Going to need that elsewhere as well.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1231,6 +1231,7 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 		     struct amdgpu_irq_src *irq_src, unsigned irq_type,
 		     enum amdgpu_ring_type ring_type);
 void amdgpu_ring_fini(struct amdgpu_ring *ring);
+struct amdgpu_ring *amdgpu_ring_from_fence(struct fence *f);
 
 /*
  * CS.

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

@@ -436,6 +436,30 @@ void amdgpu_ring_fini(struct amdgpu_ring *ring)
 	}
 }
 
+/**
+ * amdgpu_ring_from_fence - get ring from fence
+ *
+ * @f: fence structure
+ *
+ * Extract the ring a fence belongs to. Handles both scheduler as
+ * well as hardware fences.
+ */
+struct amdgpu_ring *amdgpu_ring_from_fence(struct fence *f)
+{
+	struct amdgpu_fence *a_fence;
+	struct amd_sched_fence *s_fence;
+
+	s_fence = to_amd_sched_fence(f);
+	if (s_fence)
+		return container_of(s_fence->sched, struct amdgpu_ring, sched);
+
+	a_fence = to_amdgpu_fence(f);
+	if (a_fence)
+		return a_fence->ring;
+
+	return NULL;
+}
+
 /*
  * Debugfs info
  */

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

@@ -139,25 +139,6 @@ int amdgpu_sa_bo_manager_suspend(struct amdgpu_device *adev,
 	return r;
 }
 
-static uint32_t amdgpu_sa_get_ring_from_fence(struct fence *f)
-{
-	struct amdgpu_fence *a_fence;
-	struct amd_sched_fence *s_fence;
-
-	s_fence = to_amd_sched_fence(f);
-	if (s_fence) {
-		struct amdgpu_ring *ring;
-
-		ring = container_of(s_fence->sched, struct amdgpu_ring, sched);
-		return ring->idx;
-	}
-
-	a_fence = to_amdgpu_fence(f);
-	if (a_fence)
-		return a_fence->ring->idx;
-	return 0;
-}
-
 static void amdgpu_sa_bo_remove_locked(struct amdgpu_sa_bo *sa_bo)
 {
 	struct amdgpu_sa_manager *sa_manager = sa_bo->manager;
@@ -318,7 +299,7 @@ static bool amdgpu_sa_bo_next_hole(struct amdgpu_sa_manager *sa_manager,
 	}
 
 	if (best_bo) {
-		uint32_t idx = amdgpu_sa_get_ring_from_fence(best_bo->fence);
+		uint32_t idx = amdgpu_ring_from_fence(best_bo->fence)->idx;
 		++tries[idx];
 		sa_manager->hole = best_bo->olist.prev;
 
@@ -412,7 +393,7 @@ void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct amdgpu_sa_bo **sa_bo,
 	if (fence && !fence_is_signaled(fence)) {
 		uint32_t idx;
 		(*sa_bo)->fence = fence_get(fence);
-		idx = amdgpu_sa_get_ring_from_fence(fence);
+		idx = amdgpu_ring_from_fence(fence)->idx;
 		list_add_tail(&(*sa_bo)->flist, &sa_manager->flist[idx]);
 	} else {
 		amdgpu_sa_bo_remove_locked(*sa_bo);