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 | __GFP_NOFAIL);  in virtio_gpu_get_vbuf()
122 virtio_gpu_alloc_cursor(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cursor()  argument
128 		(vgdev, sizeof(struct virtio_gpu_update_cursor),  in virtio_gpu_alloc_cursor()
138 static void *virtio_gpu_alloc_cmd_resp(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cmd_resp()  argument
146 	vbuf = virtio_gpu_get_vbuf(vgdev, cmd_size,  in virtio_gpu_alloc_cmd_resp()
152 static void *virtio_gpu_alloc_cmd(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cmd()  argument
156 	return virtio_gpu_alloc_cmd_resp(vgdev, NULL, vbuffer_p, size,  in virtio_gpu_alloc_cmd()
161 static void *virtio_gpu_alloc_cmd_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_alloc_cmd_cb()  argument
166 	return virtio_gpu_alloc_cmd_resp(vgdev, cb, vbuffer_p, size,  in virtio_gpu_alloc_cmd_cb()
171 static void free_vbuf(struct virtio_gpu_device *vgdev,  in free_vbuf()  argument
177 	kmem_cache_free(vgdev->vbufs, vbuf);  in free_vbuf()
196 	struct virtio_gpu_device *vgdev =  in virtio_gpu_dequeue_ctrl_func()  local
205 	spin_lock(&vgdev->ctrlq.qlock);  in virtio_gpu_dequeue_ctrl_func()
207 		virtqueue_disable_cb(vgdev->ctrlq.vq);  in virtio_gpu_dequeue_ctrl_func()
208 		reclaim_vbufs(vgdev->ctrlq.vq, &reclaim_list);  in virtio_gpu_dequeue_ctrl_func()
210 	} while (!virtqueue_enable_cb(vgdev->ctrlq.vq));  in virtio_gpu_dequeue_ctrl_func()
211 	spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_dequeue_ctrl_func()
216 		trace_virtio_gpu_cmd_response(vgdev->ctrlq.vq, resp);  in virtio_gpu_dequeue_ctrl_func()
239 			entry->resp_cb(vgdev, entry);  in virtio_gpu_dequeue_ctrl_func()
241 	wake_up(&vgdev->ctrlq.ack_queue);  in virtio_gpu_dequeue_ctrl_func()
244 		virtio_gpu_fence_event_process(vgdev, fence_id);  in virtio_gpu_dequeue_ctrl_func()
248 			virtio_gpu_array_put_free_delayed(vgdev, entry->objs);  in virtio_gpu_dequeue_ctrl_func()
250 		free_vbuf(vgdev, entry);  in virtio_gpu_dequeue_ctrl_func()
256 	struct virtio_gpu_device *vgdev =  in virtio_gpu_dequeue_cursor_func()  local
263 	spin_lock(&vgdev->cursorq.qlock);  in virtio_gpu_dequeue_cursor_func()
265 		virtqueue_disable_cb(vgdev->cursorq.vq);  in virtio_gpu_dequeue_cursor_func()
266 		reclaim_vbufs(vgdev->cursorq.vq, &reclaim_list);  in virtio_gpu_dequeue_cursor_func()
267 	} while (!virtqueue_enable_cb(vgdev->cursorq.vq));  in virtio_gpu_dequeue_cursor_func()
268 	spin_unlock(&vgdev->cursorq.qlock);  in virtio_gpu_dequeue_cursor_func()
272 		free_vbuf(vgdev, entry);  in virtio_gpu_dequeue_cursor_func()
274 	wake_up(&vgdev->cursorq.ack_queue);  in virtio_gpu_dequeue_cursor_func()
317 static int virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_ctrl_sgs()  argument
325 	struct virtqueue *vq = vgdev->ctrlq.vq;  in virtio_gpu_queue_ctrl_sgs()
328 	if (!drm_dev_enter(vgdev->ddev, &idx)) {  in virtio_gpu_queue_ctrl_sgs()
331 		free_vbuf(vgdev, vbuf);  in virtio_gpu_queue_ctrl_sgs()
335 	if (vgdev->has_indirect)  in virtio_gpu_queue_ctrl_sgs()
339 	spin_lock(&vgdev->ctrlq.qlock);  in virtio_gpu_queue_ctrl_sgs()
342 		spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_queue_ctrl_sgs()
343 		virtio_gpu_notify(vgdev);  in virtio_gpu_queue_ctrl_sgs()
344 		wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= elemcnt);  in virtio_gpu_queue_ctrl_sgs()
352 		virtio_gpu_fence_emit(vgdev, virtio_gpu_vbuf_ctrl_hdr(vbuf),  in virtio_gpu_queue_ctrl_sgs()
365 	atomic_inc(&vgdev->pending_commands);  in virtio_gpu_queue_ctrl_sgs()
367 	spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_queue_ctrl_sgs()
373 static int virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_fenced_ctrl_buffer()  argument
417 	ret = virtio_gpu_queue_ctrl_sgs(vgdev, vbuf, fence, elemcnt, sgs, outcnt,  in virtio_gpu_queue_fenced_ctrl_buffer()
427 void virtio_gpu_notify(struct virtio_gpu_device *vgdev)  in virtio_gpu_notify()  argument
431 	if (!atomic_read(&vgdev->pending_commands))  in virtio_gpu_notify()
434 	spin_lock(&vgdev->ctrlq.qlock);  in virtio_gpu_notify()
435 	atomic_set(&vgdev->pending_commands, 0);  in virtio_gpu_notify()
436 	notify = virtqueue_kick_prepare(vgdev->ctrlq.vq);  in virtio_gpu_notify()
437 	spin_unlock(&vgdev->ctrlq.qlock);  in virtio_gpu_notify()
440 		virtqueue_notify(vgdev->ctrlq.vq);  in virtio_gpu_notify()
443 static int virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_ctrl_buffer()  argument
446 	return virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, NULL);  in virtio_gpu_queue_ctrl_buffer()
449 static void virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev,  in virtio_gpu_queue_cursor()  argument
452 	struct virtqueue *vq = vgdev->cursorq.vq;  in virtio_gpu_queue_cursor()
457 	if (!drm_dev_enter(vgdev->ddev, &idx)) {  in virtio_gpu_queue_cursor()
458 		free_vbuf(vgdev, vbuf);  in virtio_gpu_queue_cursor()
466 	spin_lock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
470 		spin_unlock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
471 		wait_event(vgdev->cursorq.ack_queue, vq->num_free >= outcnt);  in virtio_gpu_queue_cursor()
472 		spin_lock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
481 	spin_unlock(&vgdev->cursorq.qlock);  in virtio_gpu_queue_cursor()
494 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_create_resource()  argument
503 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_create_resource()
513 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_create_resource()
517 static void virtio_gpu_cmd_unref_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_unref_cb()  argument
528 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_unref_resource()  argument
535 	cmd_p = virtio_gpu_alloc_cmd_cb(vgdev, &vbuf, sizeof(*cmd_p),  in virtio_gpu_cmd_unref_resource()
543 	ret = virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_unref_resource()
548 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_set_scanout()  argument
556 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_set_scanout()
567 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_set_scanout()
570 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_flush()  argument
578 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_resource_flush()
588 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_resource_flush()
591 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_transfer_to_host_2d()  argument
601 	bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);  in virtio_gpu_cmd_transfer_to_host_2d()
605 		dma_sync_sgtable_for_device(vgdev->vdev->dev.parent,  in virtio_gpu_cmd_transfer_to_host_2d()
608 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_transfer_to_host_2d()
620 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_transfer_to_host_2d()
624 virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_attach_backing()  argument
633 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_resource_attach_backing()
643 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_resource_attach_backing()
646 static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_display_info_cb()  argument
653 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_display_info_cb()
654 	for (i = 0; i < vgdev->num_scanouts; i++) {  in virtio_gpu_cmd_get_display_info_cb()
655 		vgdev->outputs[i].info = resp->pmodes[i];  in virtio_gpu_cmd_get_display_info_cb()
667 	vgdev->display_info_pending = false;  in virtio_gpu_cmd_get_display_info_cb()
668 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_display_info_cb()
669 	wake_up(&vgdev->resp_wq);  in virtio_gpu_cmd_get_display_info_cb()
671 	if (!drm_helper_hpd_irq_event(vgdev->ddev))  in virtio_gpu_cmd_get_display_info_cb()
672 		drm_kms_helper_hotplug_event(vgdev->ddev);  in virtio_gpu_cmd_get_display_info_cb()
675 static void virtio_gpu_cmd_get_capset_info_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_capset_info_cb()  argument
684 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset_info_cb()
685 	if (vgdev->capsets) {  in virtio_gpu_cmd_get_capset_info_cb()
686 		vgdev->capsets[i].id = le32_to_cpu(resp->capset_id);  in virtio_gpu_cmd_get_capset_info_cb()
687 		vgdev->capsets[i].max_version = le32_to_cpu(resp->capset_max_version);  in virtio_gpu_cmd_get_capset_info_cb()
688 		vgdev->capsets[i].max_size = le32_to_cpu(resp->capset_max_size);  in virtio_gpu_cmd_get_capset_info_cb()
692 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset_info_cb()
693 	wake_up(&vgdev->resp_wq);  in virtio_gpu_cmd_get_capset_info_cb()
696 static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_capset_cb()  argument
705 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_capset_cb()
706 	list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {  in virtio_gpu_cmd_capset_cb()
717 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_capset_cb()
718 	wake_up_all(&vgdev->resp_wq);  in virtio_gpu_cmd_capset_cb()
733 static void virtio_gpu_cmd_get_edid_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_edid_cb()  argument
744 	if (scanout >= vgdev->num_scanouts)  in virtio_gpu_cmd_get_edid_cb()
746 	output = vgdev->outputs + scanout;  in virtio_gpu_cmd_get_edid_cb()
751 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_edid_cb()
754 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_edid_cb()
757 	wake_up(&vgdev->resp_wq);  in virtio_gpu_cmd_get_edid_cb()
760 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev)  in virtio_gpu_cmd_get_display_info()  argument
772 		(vgdev, &virtio_gpu_cmd_get_display_info_cb, &vbuf,  in virtio_gpu_cmd_get_display_info()
777 	vgdev->display_info_pending = true;  in virtio_gpu_cmd_get_display_info()
779 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_display_info()
783 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx)  in virtio_gpu_cmd_get_capset_info()  argument
795 		(vgdev, &virtio_gpu_cmd_get_capset_info_cb, &vbuf,  in virtio_gpu_cmd_get_capset_info()
802 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_capset_info()
806 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_get_capset()  argument
819 	if (idx >= vgdev->num_capsets)  in virtio_gpu_cmd_get_capset()
822 	if (version > vgdev->capsets[idx].max_version)  in virtio_gpu_cmd_get_capset()
829 	max_size = vgdev->capsets[idx].max_size;  in virtio_gpu_cmd_get_capset()
845 	cache_ent->id = vgdev->capsets[idx].id;  in virtio_gpu_cmd_get_capset()
848 	spin_lock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset()
850 	list_for_each_entry(search_ent, &vgdev->cap_cache, head) {  in virtio_gpu_cmd_get_capset()
851 		if (search_ent->id == vgdev->capsets[idx].id &&  in virtio_gpu_cmd_get_capset()
858 		list_add_tail(&cache_ent->head, &vgdev->cap_cache);  in virtio_gpu_cmd_get_capset()
859 	spin_unlock(&vgdev->display_info_lock);  in virtio_gpu_cmd_get_capset()
870 		(vgdev, &virtio_gpu_cmd_capset_cb, &vbuf, sizeof(*cmd_p),  in virtio_gpu_cmd_get_capset()
874 	cmd_p->capset_id = cpu_to_le32(vgdev->capsets[idx].id);  in virtio_gpu_cmd_get_capset()
877 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_capset()
882 int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev)  in virtio_gpu_cmd_get_edids()  argument
889 	if (WARN_ON(!vgdev->has_edid))  in virtio_gpu_cmd_get_edids()
892 	for (scanout = 0; scanout < vgdev->num_scanouts; scanout++) {  in virtio_gpu_cmd_get_edids()
899 			(vgdev, &virtio_gpu_cmd_get_edid_cb, &vbuf,  in virtio_gpu_cmd_get_edids()
904 		virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_get_edids()
910 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,  in virtio_gpu_cmd_context_create()  argument
916 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_create()
924 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_create()
927 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_context_destroy()  argument
933 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_destroy()
938 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_destroy()
941 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_context_attach_resource()  argument
949 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_attach_resource()
956 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_attach_resource()
959 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_context_detach_resource()  argument
967 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_context_detach_resource()
974 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_context_detach_resource()
978 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_create_3d()  argument
987 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_resource_create_3d()
1005 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_resource_create_3d()
1010 void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_transfer_to_host_3d()  argument
1020 	bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);  in virtio_gpu_cmd_transfer_to_host_3d()
1024 		dma_sync_sgtable_for_device(vgdev->vdev->dev.parent,  in virtio_gpu_cmd_transfer_to_host_3d()
1027 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_transfer_to_host_3d()
1039 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_transfer_to_host_3d()
1042 void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_transfer_from_host_3d()  argument
1053 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_transfer_from_host_3d()
1065 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_transfer_from_host_3d()
1068 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_submit()  argument
1077 	cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));  in virtio_gpu_cmd_submit()
1088 	virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence);  in virtio_gpu_cmd_submit()
1091 void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,  in virtio_gpu_object_attach()  argument
1096 	virtio_gpu_cmd_resource_attach_backing(vgdev, obj->hw_res_handle,  in virtio_gpu_object_attach()
1100 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,  in virtio_gpu_cursor_ping()  argument
1107 	cur_p = virtio_gpu_alloc_cursor(vgdev, &vbuf);  in virtio_gpu_cursor_ping()
1109 	virtio_gpu_queue_cursor(vgdev, vbuf);  in virtio_gpu_cursor_ping()
1112 static void virtio_gpu_cmd_resource_uuid_cb(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_uuid_cb()  argument
1121 	spin_lock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_uuid_cb()
1131 	spin_unlock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_uuid_cb()
1133 	wake_up_all(&vgdev->resp_wq);  in virtio_gpu_cmd_resource_uuid_cb()
1137 virtio_gpu_cmd_resource_assign_uuid(struct virtio_gpu_device *vgdev,  in virtio_gpu_cmd_resource_assign_uuid()  argument
1147 		spin_lock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_assign_uuid()
1149 		spin_unlock(&vgdev->resource_export_lock);  in virtio_gpu_cmd_resource_assign_uuid()
1155 		(vgdev, virtio_gpu_cmd_resource_uuid_cb, &vbuf, sizeof(*cmd_p),  in virtio_gpu_cmd_resource_assign_uuid()
1163 	virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);  in virtio_gpu_cmd_resource_assign_uuid()