drm/ttm: move ghost object creation to a common function

Both accel cleanup and pipeline move had the same code, make
a single function for it.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200917043040.146575-7-airlied@gmail.com

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -526,26 +526,13 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
 }
 EXPORT_SYMBOL(ttm_bo_kunmap);
 
-int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
+static int ttm_bo_move_to_ghost(struct ttm_buffer_object *bo,
 				struct dma_fence *fence,
-			      bool evict,
-			      struct ttm_resource *new_mem)
+				bool dst_use_tt)
 {
-	struct ttm_bo_device *bdev = bo->bdev;
-	struct ttm_resource_manager *man = ttm_manager_type(bdev, new_mem->mem_type);
-	int ret;
 	struct ttm_buffer_object *ghost_obj;
+	int ret;
 
-	dma_resv_add_excl_fence(bo->base.resv, fence);
-	if (evict) {
-		ret = ttm_bo_wait(bo, false, false);
-		if (ret)
-			return ret;
-
-		if (!man->use_tt)
-			ttm_bo_tt_destroy(bo);
-		ttm_bo_free_old_node(bo);
-	} else {
 	/**
 	 * This should help pipeline ordinary buffer moves.
 	 *
@@ -569,14 +556,38 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
 	 * bo to be unbound and destroyed.
 	 */
 
-		if (man->use_tt) {
+	if (dst_use_tt)
 		ghost_obj->ttm = NULL;
-		} else {
+	else
 		bo->ttm = NULL;
-		}
 
 	dma_resv_unlock(&ghost_obj->base._resv);
 	ttm_bo_put(ghost_obj);
+	return 0;
+}
+
+int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
+			      struct dma_fence *fence,
+			      bool evict,
+			      struct ttm_resource *new_mem)
+{
+	struct ttm_bo_device *bdev = bo->bdev;
+	struct ttm_resource_manager *man = ttm_manager_type(bdev, new_mem->mem_type);
+	int ret;
+
+	dma_resv_add_excl_fence(bo->base.resv, fence);
+	if (evict) {
+		ret = ttm_bo_wait(bo, false, false);
+		if (ret)
+			return ret;
+
+		if (!man->use_tt)
+			ttm_bo_tt_destroy(bo);
+		ttm_bo_free_old_node(bo);
+	} else {
+		ret = ttm_bo_move_to_ghost(bo, fence, man->use_tt);
+		if (ret)
+			return ret;
 	}
 
 	ttm_bo_assign_mem(bo, new_mem);
@@ -599,40 +610,9 @@ int ttm_bo_pipeline_move(struct ttm_buffer_object *bo,
 	dma_resv_add_excl_fence(bo->base.resv, fence);
 
 	if (!evict) {
-		struct ttm_buffer_object *ghost_obj;
-
-		/**
-		 * This should help pipeline ordinary buffer moves.
-		 *
-		 * Hang old buffer memory on a new buffer object,
-		 * and leave it to be released when the GPU
-		 * operation has completed.
-		 */
-
-		dma_fence_put(bo->moving);
-		bo->moving = dma_fence_get(fence);
-
-		ret = ttm_buffer_object_transfer(bo, &ghost_obj);
+		ret = ttm_bo_move_to_ghost(bo, fence, to->use_tt);
 		if (ret)
 			return ret;
-
-		dma_resv_add_excl_fence(&ghost_obj->base._resv, fence);
-
-		/**
-		 * If we're not moving to fixed memory, the TTM object
-		 * needs to stay alive. Otherwhise hang it on the ghost
-		 * bo to be unbound and destroyed.
-		 */
-
-		if (to->use_tt) {
-			ghost_obj->ttm = NULL;
-		} else {
-			bo->ttm = NULL;
-		}
-
-		dma_resv_unlock(&ghost_obj->base._resv);
-		ttm_bo_put(ghost_obj);
-
 	} else if (!from->use_tt) {
 
 		/**