drm/virtio: rework virtio_gpu_transfer_to_host_ioctl fencing

Switch to the virtio_gpu_array_* helper workflow.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190829103301.3539-12-kraxel@redhat.com

1 files changed, 21 insertions, 29 deletions

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index f2133d371aaa..677d844d88bc 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -383,52 +383,44 @@ static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
 	struct virtio_gpu_device *vgdev = dev->dev_private;
 	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 	struct drm_virtgpu_3d_transfer_to_host *args = data;
-	struct ttm_operation_ctx ctx = { true, false };
-	struct drm_gem_object *gobj = NULL;
-	struct virtio_gpu_object *qobj = NULL;
+	struct virtio_gpu_object_array *objs;
 	struct virtio_gpu_fence *fence;
 	struct virtio_gpu_box box;
 	int ret;
 	u32 offset = args->offset;
 
-	gobj = drm_gem_object_lookup(file, args->bo_handle);
-	if (gobj == NULL)
+	objs = virtio_gpu_array_from_handles(file, &args->bo_handle, 1);
+	if (objs == NULL)
 		return -ENOENT;
 
-	qobj = gem_to_virtio_gpu_obj(gobj);
-
-	ret = virtio_gpu_object_reserve(qobj);
-	if (ret)
-		goto out;
-
-	ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
-	if (unlikely(ret))
-		goto out_unres;
-
 	convert_to_hw_box(&box, &args->box);
 	if (!vgdev->has_virgl_3d) {
 		virtio_gpu_cmd_transfer_to_host_2d
-			(vgdev, qobj, offset,
-			 box.w, box.h, box.x, box.y, NULL);
+			(vgdev, offset,
+			 box.w, box.h, box.x, box.y,
+			 objs, NULL);
 	} else {
+		ret = virtio_gpu_array_lock_resv(objs);
+		if (ret != 0)
+			goto err_put_free;
+
+		ret = -ENOMEM;
 		fence = virtio_gpu_fence_alloc(vgdev);
-		if (!fence) {
-			ret = -ENOMEM;
-			goto out_unres;
-		}
+		if (!fence)
+			goto err_unlock;
+
 		virtio_gpu_cmd_transfer_to_host_3d
-			(vgdev, qobj,
+			(vgdev,
 			 vfpriv ? vfpriv->ctx_id : 0, offset,
-			 args->level, &box, fence);
-		dma_resv_add_excl_fence(qobj->tbo.base.resv,
-						  &fence->f);
+			 args->level, &box, objs, fence);
 		dma_fence_put(&fence->f);
 	}
+	return 0;
 
-out_unres:
-	virtio_gpu_object_unreserve(qobj);
-out:
-	drm_gem_object_put_unlocked(gobj);
+err_unlock:
+	virtio_gpu_array_unlock_resv(objs);
+err_put_free:
+	virtio_gpu_array_put_free(objs);
 	return ret;
 }