[PATCH v2 07/12] drm/virtio: rework virtio_gpu_execbuffer_ioctl fencing

[Gerd Hoffmann <kraxel@redhat.com>]

Use gem reservation helpers and direct reservation_object_* calls
instead of ttm.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 36 ++++++++++++--------------
 1 file changed, 17 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index 5cffd2e54c04..6db6a6e92dde 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -107,12 +107,11 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
 	struct virtio_gpu_fpriv *vfpriv = drm_file->driver_priv;
 	struct drm_gem_object *gobj;
 	struct virtio_gpu_fence *out_fence;
-	struct virtio_gpu_object *qobj;
 	int ret;
 	uint32_t *bo_handles = NULL;
 	void __user *user_bo_handles = NULL;
 	struct list_head validate_list;
-	struct ttm_validate_buffer *buflist = NULL;
+	struct drm_gem_object **buflist = NULL;
 	int i;
 	struct ww_acquire_ctx ticket;
 	struct sync_file *sync_file;
@@ -157,12 +156,11 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
 
 	INIT_LIST_HEAD(&validate_list);
 	if (exbuf->num_bo_handles) {
-
 		bo_handles = kvmalloc_array(exbuf->num_bo_handles,
-					   sizeof(uint32_t), GFP_KERNEL);
+					    sizeof(uint32_t), GFP_KERNEL);
 		buflist = kvmalloc_array(exbuf->num_bo_handles,
-					   sizeof(struct ttm_validate_buffer),
-					   GFP_KERNEL | __GFP_ZERO);
+					 sizeof(struct drm_gem_object*),
+					 GFP_KERNEL | __GFP_ZERO);
 		if (!bo_handles || !buflist) {
 			ret = -ENOMEM;
 			goto out_unused_fd;
@@ -181,19 +179,15 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
 				ret = -ENOENT;
 				goto out_unused_fd;
 			}
-
-			qobj = gem_to_virtio_gpu_obj(gobj);
-			buflist[i].bo = &qobj->tbo;
-
-			list_add(&buflist[i].head, &validate_list);
+			buflist[i] = gobj;
 		}
 		kvfree(bo_handles);
 		bo_handles = NULL;
 	}
 
-	ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
+	ret = drm_gem_lock_reservations(buflist, exbuf->num_bo_handles, &ticket);
 	if (ret)
-		goto out_free;
+		goto out_unused_fd;
 
 	buf = memdup_user(u64_to_user_ptr(exbuf->command), exbuf->size);
 	if (IS_ERR(buf)) {
@@ -222,21 +216,25 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
 	virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
 			      vfpriv->ctx_id, out_fence);
 
-	ttm_eu_fence_buffer_objects(&ticket, &validate_list, &out_fence->f);
+	for (i = 0; i < exbuf->num_bo_handles; i++)
+		reservation_object_add_excl_fence(buflist[i]->resv, &out_fence->f);
+	drm_gem_unlock_reservations(buflist, exbuf->num_bo_handles, &ticket);
 
-	/* fence the command bo */
-	virtio_gpu_unref_list(&validate_list);
+	for (i = 0; i < exbuf->num_bo_handles; i++)
+		if (buflist[i])
+			drm_gem_object_put_unlocked(buflist[i]);
 	kvfree(buflist);
 	return 0;
 
 out_memdup:
 	kfree(buf);
 out_unresv:
-	ttm_eu_backoff_reservation(&ticket, &validate_list);
-out_free:
-	virtio_gpu_unref_list(&validate_list);
+	drm_gem_unlock_reservations(buflist, exbuf->num_bo_handles, &ticket);
 out_unused_fd:
 	kvfree(bo_handles);
+	for (i = 0; i < exbuf->num_bo_handles; i++)
+		if (buflist && buflist[i])
+			drm_gem_object_put_unlocked(buflist[i]);
 	kvfree(buflist);
 
 	if (out_fence_fd >= 0)
-- 
2.18.1