57 	struct virtio_gpu_device *vgdev = dev->dev_private;  in virtio_gpu_ctrl_ack()  local
59 	schedule_work(&vgdev->ctrlq.dequeue_work);  in virtio_gpu_ctrl_ack()
65 	struct virtio_gpu_device *vgdev = dev->dev_private;  in virtio_gpu_cursor_ack()  local
67 	schedule_work(&vgdev->cursorq.dequeue_work);  in virtio_gpu_cursor_ack()
70 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev)  in virtio_gpu_alloc_vbufs()  argument
72 	vgdev->vbufs = kmem_cache_create("virtio-gpu-vbufs",  in virtio_gpu_alloc_vbufs()
76 	if (!vgdev->vbufs)  in virtio_gpu_alloc_vbufs()
81 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev)  in virtio_gpu_free_vbufs()  argument
83 	kmem_cache_destroy(vgdev->vbufs);  in virtio_gpu_free_vbufs()
84 	vgdev->vbufs = NULL;  in virtio_gpu_free_vbufs()
88 virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev,  in virtio_gpu_get_vbuf()  argument
94 	vbuf = kmem_cache_zalloc(vgdev->vbufs, GFP_KERNEL);  in virtio_gpu_get_vbuf()
124 virtio_gpu_alloc_cursor(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cursor()  argument
130 		(vgdev, sizeof(struct virtio_gpu_update_cursor),  in virtio_gpu_alloc_cursor()
140 static void *virtio_gpu_alloc_cmd_resp(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cmd_resp()  argument
148 	vbuf = virtio_gpu_get_vbuf(vgdev, cmd_size,  in virtio_gpu_alloc_cmd_resp()
158 static void *virtio_gpu_alloc_cmd(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cmd()  argument
162 	return virtio_gpu_alloc_cmd_resp(vgdev, NULL, vbuffer_p, size,  in virtio_gpu_alloc_cmd()
167 static void *virtio_gpu_alloc_cmd_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cmd_cb()  argument
172 	return virtio_gpu_alloc_cmd_resp(vgdev, cb, vbuffer_p, size,  in virtio_gpu_alloc_cmd_cb()
177 static void free_vbuf(struct virtio_gpu_device *vgdev,  in free_vbuf()  argument
183 	kmem_cache_free(vgdev->vbufs, vbuf);  in free_vbuf()
202 	struct virtio_gpu_device *vgdev =  in virtio_gpu_dequeue_ctrl_func()  local
211 	spin_lock(&vgdev->ctrlq.qlock);  in virtio_gpu_dequeue_ctrl_func()
213 		virtqueue_disable_cb(vgdev->ctrlq.vq);  in virtio_gpu_dequeue_ctrl_func()
214 		reclaim_vbufs(vgdev->ctrlq.vq, &reclaim_list);  in virtio_gpu_dequeue_ctrl_func()
216 	} while (!virtqueue_enable_cb(vgdev->ctrlq.vq));  in virtio_gpu_dequeue_ctrl_func()
217 	spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_dequeue_ctrl_func()
222 		trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp);  in virtio_gpu_dequeue_ctrl_func()
245 			entry->resp_cb(vgdev, entry);  in virtio_gpu_dequeue_ctrl_func()
247 	wake_up(&vgdev->ctrlq.ack_queue);  in virtio_gpu_dequeue_ctrl_func()
250 		virtio_gpu_fence_event_process(vgdev, fence_id);  in virtio_gpu_dequeue_ctrl_func()
254 			virtio_gpu_array_put_free_delayed(vgdev, entry->objs);  in virtio_gpu_dequeue_ctrl_func()
256 		free_vbuf(vgdev, entry);  in virtio_gpu_dequeue_ctrl_func()
262 	struct virtio_gpu_device *vgdev =  in virtio_gpu_dequeue_cursor_func()  local
269 	spin_lock(&vgdev->cursorq.qlock);  in virtio_gpu_dequeue_cursor_func()
271 		virtqueue_disable_cb(vgdev->cursorq.vq);  in virtio_gpu_dequeue_cursor_func()
272 		reclaim_vbufs(vgdev->cursorq.vq, &reclaim_list);  in virtio_gpu_dequeue_cursor_func()
273 	} while (!virtqueue_enable_cb(vgdev->cursorq.vq));  in virtio_gpu_dequeue_cursor_func()
274 	spin_unlock(&vgdev->cursorq.qlock);  in virtio_gpu_dequeue_cursor_func()
278 		free_vbuf(vgdev, entry);  in virtio_gpu_dequeue_cursor_func()
280 	wake_up(&vgdev->cursorq.ack_queue);  in virtio_gpu_dequeue_cursor_func()
323 static int virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_ctrl_sgs()  argument
331 	struct virtqueue *vq = vgdev->ctrlq.vq;  in virtio_gpu_queue_ctrl_sgs()
334 	if (!drm_dev_enter(vgdev->ddev, &idx)) {  in virtio_gpu_queue_ctrl_sgs()
337 		free_vbuf(vgdev, vbuf);  in virtio_gpu_queue_ctrl_sgs()
341 	if (vgdev->has_indirect)  in virtio_gpu_queue_ctrl_sgs()
345 	spin_lock(&vgdev->ctrlq.qlock);  in virtio_gpu_queue_ctrl_sgs()
348 		spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_queue_ctrl_sgs()
349 		virtio_gpu_notify(vgdev);  in virtio_gpu_queue_ctrl_sgs()
350 		wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= elemcnt);  in virtio_gpu_queue_ctrl_sgs()
358 		virtio_gpu_fence_emit(vgdev, virtio_gpu_vbuf_ctrl_hdr(vbuf),  in virtio_gpu_queue_ctrl_sgs()
371 	atomic_inc(&vgdev->pending_commands);  in virtio_gpu_queue_ctrl_sgs()
373 	spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_queue_ctrl_sgs()
379 static int virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_fenced_ctrl_buffer()  argument
423 	ret = virtio_gpu_queue_ctrl_sgs(vgdev, vbuf, fence, elemcnt, sgs, outcnt,  in virtio_gpu_queue_fenced_ctrl_buffer()
433 void virtio_gpu_notify(struct virtio_gpu_device *vgdev)  in virtio_gpu_notify()  argument
437 	if (!atomic_read(&vgdev->pending_commands))  in virtio_gpu_notify()
440 	spin_lock(&vgdev->ctrlq.qlock);  in virtio_gpu_notify()
441 	atomic_set(&vgdev->pending_commands, 0);  in virtio_gpu_notify()
442 	notify = virtqueue_kick_prepare(vgdev->ctrlq.vq);  in virtio_gpu_notify()
443 	spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_notify()
446 		virtqueue_notify(vgdev->ctrlq.vq);  in virtio_gpu_notify()
449 static int virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_ctrl_buffer()  argument
452 	return virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, NULL);  in virtio_gpu_queue_ctrl_buffer()
455 static void virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_cursor()  argument
458 	struct virtqueue *vq = vgdev->cursorq.vq;  in virtio_gpu_queue_cursor()
463 	if (!drm_dev_enter(vgdev->ddev, &idx)) {  in virtio_gpu_queue_cursor()
464 		free_vbuf(vgdev, vbuf);  in virtio_gpu_queue_cursor()
472 	spin_lock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
476 		spin_unlock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
477 		wait_event(vgdev->cursorq.ack_queue, vq->num_free >= outcnt);  in virtio_gpu_queue_cursor()
478 		spin_lock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
487 	spin_unlock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
500 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_create_resource()  argument
509 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_create_resource()
519 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_create_resource()
523 static void virtio_gpu_cmd_unref_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_unref_cb()  argument
534 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_unref_resource()  argument
541 	cmd_p = virtio_gpu_alloc_cmd_cb(vgdev, &vbuf, sizeof(*cmd_p),  in virtio_gpu_cmd_unref_resource()
549 	ret = virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_unref_resource()
554 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_set_scanout()  argument
562 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_set_scanout()
573 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_set_scanout()
576 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_flush()  argument
584 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_resource_flush()
594 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_resource_flush()
597 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_transfer_to_host_2d()  argument
607 	bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);  in virtio_gpu_cmd_transfer_to_host_2d()
611 		dma_sync_sgtable_for_device(vgdev->vdev->dev.parent,  in virtio_gpu_cmd_transfer_to_host_2d()
614 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_transfer_to_host_2d()
626 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_transfer_to_host_2d()
630 virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_attach_backing()  argument
639 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_resource_attach_backing()
649 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_resource_attach_backing()
652 static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_display_info_cb()  argument
659 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_display_info_cb()
660 	for (i = 0; i < vgdev->num_scanouts; i++) {  in virtio_gpu_cmd_get_display_info_cb()
661 		vgdev->outputs[i].info = resp->pmodes[i];  in virtio_gpu_cmd_get_display_info_cb()
673 	vgdev->display_info_pending = false;  in virtio_gpu_cmd_get_display_info_cb()
674 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_display_info_cb()
675 	wake_up(&vgdev->resp_wq);  in virtio_gpu_cmd_get_display_info_cb()
677 	if (!drm_helper_hpd_irq_event(vgdev->ddev))  in virtio_gpu_cmd_get_display_info_cb()
678 		drm_kms_helper_hotplug_event(vgdev->ddev);  in virtio_gpu_cmd_get_display_info_cb()
681 static void virtio_gpu_cmd_get_capset_info_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_capset_info_cb()  argument
690 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset_info_cb()
691 	if (vgdev->capsets) {  in virtio_gpu_cmd_get_capset_info_cb()
692 		vgdev->capsets[i].id = le32_to_cpu(resp->capset_id);  in virtio_gpu_cmd_get_capset_info_cb()
693 		vgdev->capsets[i].max_version = le32_to_cpu(resp->capset_max_version);  in virtio_gpu_cmd_get_capset_info_cb()
694 		vgdev->capsets[i].max_size = le32_to_cpu(resp->capset_max_size);  in virtio_gpu_cmd_get_capset_info_cb()
698 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset_info_cb()
699 	wake_up(&vgdev->resp_wq);  in virtio_gpu_cmd_get_capset_info_cb()
702 static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_capset_cb()  argument
711 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_capset_cb()
712 	list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {  in virtio_gpu_cmd_capset_cb()
723 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_capset_cb()
724 	wake_up_all(&vgdev->resp_wq);  in virtio_gpu_cmd_capset_cb()
739 static void virtio_gpu_cmd_get_edid_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_edid_cb()  argument
750 	if (scanout >= vgdev->num_scanouts)  in virtio_gpu_cmd_get_edid_cb()
752 	output = vgdev->outputs + scanout;  in virtio_gpu_cmd_get_edid_cb()
757 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_edid_cb()
760 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_edid_cb()
763 	wake_up(&vgdev->resp_wq);  in virtio_gpu_cmd_get_edid_cb()
766 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev)  in virtio_gpu_cmd_get_display_info()  argument
778 		(vgdev, &virtio_gpu_cmd_get_display_info_cb, &vbuf,  in virtio_gpu_cmd_get_display_info()
783 	vgdev->display_info_pending = true;  in virtio_gpu_cmd_get_display_info()
785 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_display_info()
789 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx)  in virtio_gpu_cmd_get_capset_info()  argument
801 		(vgdev, &virtio_gpu_cmd_get_capset_info_cb, &vbuf,  in virtio_gpu_cmd_get_capset_info()
808 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_capset_info()
812 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_capset()  argument
825 	if (idx >= vgdev->num_capsets)  in virtio_gpu_cmd_get_capset()
828 	if (version > vgdev->capsets[idx].max_version)  in virtio_gpu_cmd_get_capset()
835 	max_size = vgdev->capsets[idx].max_size;  in virtio_gpu_cmd_get_capset()
851 	cache_ent->id = vgdev->capsets[idx].id;  in virtio_gpu_cmd_get_capset()
854 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset()
856 	list_for_each_entry(search_ent, &vgdev->cap_cache, head) {  in virtio_gpu_cmd_get_capset()
857 		if (search_ent->id == vgdev->capsets[idx].id &&  in virtio_gpu_cmd_get_capset()
864 		list_add_tail(&cache_ent->head, &vgdev->cap_cache);  in virtio_gpu_cmd_get_capset()
865 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset()
876 		(vgdev, &virtio_gpu_cmd_capset_cb, &vbuf, sizeof(*cmd_p),  in virtio_gpu_cmd_get_capset()
880 	cmd_p->capset_id = cpu_to_le32(vgdev->capsets[idx].id);  in virtio_gpu_cmd_get_capset()
883 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_capset()
888 int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev)  in virtio_gpu_cmd_get_edids()  argument
895 	if (WARN_ON(!vgdev->has_edid))  in virtio_gpu_cmd_get_edids()
898 	for (scanout = 0; scanout < vgdev->num_scanouts; scanout++) {  in virtio_gpu_cmd_get_edids()
905 			(vgdev, &virtio_gpu_cmd_get_edid_cb, &vbuf,  in virtio_gpu_cmd_get_edids()
910 		virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_edids()
916 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,  in virtio_gpu_cmd_context_create()  argument
922 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_create()
930 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_create()
933 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_context_destroy()  argument
939 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_destroy()
944 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_destroy()
947 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_context_attach_resource()  argument
955 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_attach_resource()
962 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_attach_resource()
965 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_context_detach_resource()  argument
973 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_detach_resource()
980 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_detach_resource()
984 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_create_3d()  argument
993 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_resource_create_3d()
1011 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_resource_create_3d()
1016 void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_transfer_to_host_3d()  argument
1026 	bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);  in virtio_gpu_cmd_transfer_to_host_3d()
1030 		dma_sync_sgtable_for_device(vgdev->vdev->dev.parent,  in virtio_gpu_cmd_transfer_to_host_3d()
1033 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_transfer_to_host_3d()
1045 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_transfer_to_host_3d()
1048 void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_transfer_from_host_3d()  argument
1059 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_transfer_from_host_3d()
1071 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_transfer_from_host_3d()
1074 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_submit()  argument
1083 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_submit()
1094 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_submit()
1097 void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,  in virtio_gpu_object_attach()  argument
1102 	virtio_gpu_cmd_resource_attach_backing(vgdev, obj->hw_res_handle,  in virtio_gpu_object_attach()
1106 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,  in virtio_gpu_cursor_ping()  argument
1113 	cur_p = virtio_gpu_alloc_cursor(vgdev, &vbuf);  in virtio_gpu_cursor_ping()
1115 	virtio_gpu_queue_cursor(vgdev, vbuf);  in virtio_gpu_cursor_ping()
1118 static void virtio_gpu_cmd_resource_uuid_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_uuid_cb()  argument
1127 	spin_lock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_uuid_cb()
1137 	spin_unlock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_uuid_cb()
1139 	wake_up_all(&vgdev->resp_wq);  in virtio_gpu_cmd_resource_uuid_cb()
1143 virtio_gpu_cmd_resource_assign_uuid(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_assign_uuid()  argument
1153 		spin_lock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_assign_uuid()
1155 		spin_unlock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_assign_uuid()
1161 		(vgdev, virtio_gpu_cmd_resource_uuid_cb, &vbuf, sizeof(*cmd_p),  in virtio_gpu_cmd_resource_assign_uuid()
1169 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_resource_assign_uuid()