[mirror_ubuntu-hirsute-kernel.git] / drivers / gpu / drm / virtio / virtgpu_kms.c

/*
 * Copyright (C) 2015 Red Hat, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <linux/virtio.h>
#include <linux/virtio_config.h>
#include <drm/drmP.h>
#include "virtgpu_drv.h"

static int virtio_gpu_fbdev = 1;

MODULE_PARM_DESC(fbdev, "Disable/Enable framebuffer device & console");
module_param_named(fbdev, virtio_gpu_fbdev, int, 0400);

static void virtio_gpu_config_changed_work_func(struct work_struct *work)
{
	struct virtio_gpu_device *vgdev =
		container_of(work, struct virtio_gpu_device,
			     config_changed_work);
	u32 events_read, events_clear = 0;

	/* read the config space */
	virtio_cread(vgdev->vdev, struct virtio_gpu_config,
		     events_read, &events_read);
	if (events_read & VIRTIO_GPU_EVENT_DISPLAY) {
		virtio_gpu_cmd_get_display_info(vgdev);
		drm_helper_hpd_irq_event(vgdev->ddev);
		events_clear |= VIRTIO_GPU_EVENT_DISPLAY;
	}
	virtio_cwrite(vgdev->vdev, struct virtio_gpu_config,
		      events_clear, &events_clear);
}

static int virtio_gpu_context_create(struct virtio_gpu_device *vgdev,
				      uint32_t nlen, const char *name)
{
	int handle = ida_alloc(&vgdev->ctx_id_ida, GFP_KERNEL);

	if (handle < 0)
		return handle;
	handle += 1;
	virtio_gpu_cmd_context_create(vgdev, handle, nlen, name);
	return handle;
}

static void virtio_gpu_context_destroy(struct virtio_gpu_device *vgdev,
				      uint32_t ctx_id)
{
	virtio_gpu_cmd_context_destroy(vgdev, ctx_id);
	ida_free(&vgdev->ctx_id_ida, ctx_id - 1);
}

static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq,
			       void (*work_func)(struct work_struct *work))
{
	spin_lock_init(&vgvq->qlock);
	init_waitqueue_head(&vgvq->ack_queue);
	INIT_WORK(&vgvq->dequeue_work, work_func);
}

static void virtio_gpu_get_capsets(struct virtio_gpu_device *vgdev,
				   int num_capsets)
{
	int i, ret;

	vgdev->capsets = kcalloc(num_capsets,
				 sizeof(struct virtio_gpu_drv_capset),
				 GFP_KERNEL);
	if (!vgdev->capsets) {
		DRM_ERROR("failed to allocate cap sets\n");
		return;
	}
	for (i = 0; i < num_capsets; i++) {
		virtio_gpu_cmd_get_capset_info(vgdev, i);
		ret = wait_event_timeout(vgdev->resp_wq,
					 vgdev->capsets[i].id > 0, 5 * HZ);
		if (ret == 0) {
			DRM_ERROR("timed out waiting for cap set %d\n", i);
			kfree(vgdev->capsets);
			vgdev->capsets = NULL;
			return;
		}
		DRM_INFO("cap set %d: id %d, max-version %d, max-size %d\n",
			 i, vgdev->capsets[i].id,
			 vgdev->capsets[i].max_version,
			 vgdev->capsets[i].max_size);
	}
	vgdev->num_capsets = num_capsets;
}

int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
{
	static vq_callback_t *callbacks[] = {
		virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
	};
	static const char * const names[] = { "control", "cursor" };

	struct virtio_gpu_device *vgdev;
	/* this will expand later */
	struct virtqueue *vqs[2];
	u32 num_scanouts, num_capsets;
	int ret;

	if (!virtio_has_feature(dev_to_virtio(dev->dev), VIRTIO_F_VERSION_1))
		return -ENODEV;

	vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL);
	if (!vgdev)
		return -ENOMEM;

	vgdev->ddev = dev;
	dev->dev_private = vgdev;
	vgdev->vdev = dev_to_virtio(dev->dev);
	vgdev->dev = dev->dev;

	spin_lock_init(&vgdev->display_info_lock);
	ida_init(&vgdev->ctx_id_ida);
	ida_init(&vgdev->resource_ida);
	init_waitqueue_head(&vgdev->resp_wq);
	virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func);
	virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func);

	vgdev->fence_drv.context = dma_fence_context_alloc(1);
	spin_lock_init(&vgdev->fence_drv.lock);
	INIT_LIST_HEAD(&vgdev->fence_drv.fences);
	INIT_LIST_HEAD(&vgdev->cap_cache);
	INIT_WORK(&vgdev->config_changed_work,
		  virtio_gpu_config_changed_work_func);

#ifdef __LITTLE_ENDIAN
	if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL))
		vgdev->has_virgl_3d = true;
	DRM_INFO("virgl 3d acceleration %s\n",
		 vgdev->has_virgl_3d ? "enabled" : "not supported by host");
#else
	DRM_INFO("virgl 3d acceleration not supported by guest\n");
#endif

	ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL);
	if (ret) {
		DRM_ERROR("failed to find virt queues\n");
		goto err_vqs;
	}
	vgdev->ctrlq.vq = vqs[0];
	vgdev->cursorq.vq = vqs[1];
	ret = virtio_gpu_alloc_vbufs(vgdev);
	if (ret) {
		DRM_ERROR("failed to alloc vbufs\n");
		goto err_vbufs;
	}

	ret = virtio_gpu_ttm_init(vgdev);
	if (ret) {
		DRM_ERROR("failed to init ttm %d\n", ret);
		goto err_ttm;
	}

	/* get display info */
	virtio_cread(vgdev->vdev, struct virtio_gpu_config,
		     num_scanouts, &num_scanouts);
	vgdev->num_scanouts = min_t(uint32_t, num_scanouts,
				    VIRTIO_GPU_MAX_SCANOUTS);
	if (!vgdev->num_scanouts) {
		DRM_ERROR("num_scanouts is zero\n");
		ret = -EINVAL;
		goto err_scanouts;
	}
	DRM_INFO("number of scanouts: %d\n", num_scanouts);

	virtio_cread(vgdev->vdev, struct virtio_gpu_config,
		     num_capsets, &num_capsets);
	DRM_INFO("number of cap sets: %d\n", num_capsets);

	ret = virtio_gpu_modeset_init(vgdev);
	if (ret)
		goto err_modeset;

	virtio_device_ready(vgdev->vdev);
	vgdev->vqs_ready = true;

	if (num_capsets)
		virtio_gpu_get_capsets(vgdev, num_capsets);
	virtio_gpu_cmd_get_display_info(vgdev);
	wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
			   5 * HZ);
	if (virtio_gpu_fbdev)
		virtio_gpu_fbdev_init(vgdev);

	return 0;

err_modeset:
err_scanouts:
	virtio_gpu_ttm_fini(vgdev);
err_ttm:
	virtio_gpu_free_vbufs(vgdev);
err_vbufs:
	vgdev->vdev->config->del_vqs(vgdev->vdev);
err_vqs:
	kfree(vgdev);
	return ret;
}

static void virtio_gpu_cleanup_cap_cache(struct virtio_gpu_device *vgdev)
{
	struct virtio_gpu_drv_cap_cache *cache_ent, *tmp;

	list_for_each_entry_safe(cache_ent, tmp, &vgdev->cap_cache, head) {
		kfree(cache_ent->caps_cache);
		kfree(cache_ent);
	}
}

void virtio_gpu_driver_unload(struct drm_device *dev)
{
	struct virtio_gpu_device *vgdev = dev->dev_private;

	vgdev->vqs_ready = false;
	flush_work(&vgdev->ctrlq.dequeue_work);
	flush_work(&vgdev->cursorq.dequeue_work);
	flush_work(&vgdev->config_changed_work);
	vgdev->vdev->config->del_vqs(vgdev->vdev);

	virtio_gpu_modeset_fini(vgdev);
	virtio_gpu_ttm_fini(vgdev);
	virtio_gpu_free_vbufs(vgdev);
	virtio_gpu_cleanup_cap_cache(vgdev);
	kfree(vgdev->capsets);
	kfree(vgdev);
}

int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file)
{
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_fpriv *vfpriv;
	int id;
	char dbgname[TASK_COMM_LEN];

	/* can't create contexts without 3d renderer */
	if (!vgdev->has_virgl_3d)
		return 0;

	/* allocate a virt GPU context for this opener */
	vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL);
	if (!vfpriv)
		return -ENOMEM;

	get_task_comm(dbgname, current);
	id = virtio_gpu_context_create(vgdev, strlen(dbgname), dbgname);
	if (id < 0)
		return id;

	vfpriv->ctx_id = id;
	file->driver_priv = vfpriv;
	return 0;
}

void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file)
{
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_fpriv *vfpriv;

	if (!vgdev->has_virgl_3d)
		return;

	vfpriv = file->driver_priv;

	virtio_gpu_context_destroy(vgdev, vfpriv->ctx_id);
	kfree(vfpriv);
	file->driver_priv = NULL;
}
Commit	Line	Data
dc5698e8 DA	1	/*
	2	* Copyright (C) 2015 Red Hat, Inc.
	3	* All Rights Reserved.
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining
	6	* a copy of this software and associated documentation files (the
	7	* "Software"), to deal in the Software without restriction, including
	8	* without limitation the rights to use, copy, modify, merge, publish,
	9	* distribute, sublicense, and/or sell copies of the Software, and to
	10	* permit persons to whom the Software is furnished to do so, subject to
	11	* the following conditions:
	12	*
	13	* The above copyright notice and this permission notice (including the
	14	* next paragraph) shall be included in all copies or substantial
	15	* portions of the Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	18	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	19	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	20	* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
	21	* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
	22	* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	23	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	24	*/
	25
	26	#include <linux/virtio.h>
	27	#include <linux/virtio_config.h>
	28	#include <drm/drmP.h>
	29	#include "virtgpu_drv.h"
	30
	31	static int virtio_gpu_fbdev = 1;
	32
	33	MODULE_PARM_DESC(fbdev, "Disable/Enable framebuffer device & console");
	34	module_param_named(fbdev, virtio_gpu_fbdev, int, 0400);
	35
	36	static void virtio_gpu_config_changed_work_func(struct work_struct *work)
	37	{
	38	struct virtio_gpu_device *vgdev =
	39	container_of(work, struct virtio_gpu_device,
	40	config_changed_work);
	41	u32 events_read, events_clear = 0;
	42
	43	/* read the config space */
	44	virtio_cread(vgdev->vdev, struct virtio_gpu_config,
	45	events_read, &events_read);
	46	if (events_read & VIRTIO_GPU_EVENT_DISPLAY) {
	47	virtio_gpu_cmd_get_display_info(vgdev);
	48	drm_helper_hpd_irq_event(vgdev->ddev);
	49	events_clear \|= VIRTIO_GPU_EVENT_DISPLAY;
	50	}
	51	virtio_cwrite(vgdev->vdev, struct virtio_gpu_config,
	52	events_clear, &events_clear);
	53	}
	54
6a37c49a MW	55	static int virtio_gpu_context_create(struct virtio_gpu_device *vgdev,
6a37c49a MW	56	uint32_t nlen, const char *name)
62fb7a5e	57	{
2ae7f165	58	int handle = ida_alloc(&vgdev->ctx_id_ida, GFP_KERNEL);
62fb7a5e	59
6a37c49a MW	60	if (handle < 0)
6a37c49a MW	61	return handle;
2ae7f165	62	handle += 1;
6a37c49a MW	63	virtio_gpu_cmd_context_create(vgdev, handle, nlen, name);
6a37c49a MW	64	return handle;
62fb7a5e GH	65	}
	66
	67	static void virtio_gpu_context_destroy(struct virtio_gpu_device *vgdev,
	68	uint32_t ctx_id)
	69	{
	70	virtio_gpu_cmd_context_destroy(vgdev, ctx_id);
2ae7f165	71	ida_free(&vgdev->ctx_id_ida, ctx_id - 1);
62fb7a5e GH	72	}
62fb7a5e GH	73
dc5698e8 DA	74	static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq,
	75	void (work_func)(struct work_struct work))
	76	{
	77	spin_lock_init(&vgvq->qlock);
	78	init_waitqueue_head(&vgvq->ack_queue);
	79	INIT_WORK(&vgvq->dequeue_work, work_func);
	80	}
	81
62fb7a5e GH	82	static void virtio_gpu_get_capsets(struct virtio_gpu_device *vgdev,
	83	int num_capsets)
	84	{
	85	int i, ret;
	86
	87	vgdev->capsets = kcalloc(num_capsets,
	88	sizeof(struct virtio_gpu_drv_capset),
	89	GFP_KERNEL);
	90	if (!vgdev->capsets) {
	91	DRM_ERROR("failed to allocate cap sets\n");
	92	return;
	93	}
	94	for (i = 0; i < num_capsets; i++) {
	95	virtio_gpu_cmd_get_capset_info(vgdev, i);
	96	ret = wait_event_timeout(vgdev->resp_wq,
	97	vgdev->capsets[i].id > 0, 5 * HZ);
	98	if (ret == 0) {
	99	DRM_ERROR("timed out waiting for cap set %d\n", i);
	100	kfree(vgdev->capsets);
	101	vgdev->capsets = NULL;
	102	return;
	103	}
	104	DRM_INFO("cap set %d: id %d, max-version %d, max-size %d\n",
	105	i, vgdev->capsets[i].id,
	106	vgdev->capsets[i].max_version,
	107	vgdev->capsets[i].max_size);
	108	}
	109	vgdev->num_capsets = num_capsets;
	110	}
	111
dc5698e8 DA	112	int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
	113	{
	114	static vq_callback_t *callbacks[] = {
	115	virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
	116	};
f7ad26ff	117	static const char * const names[] = { "control", "cursor" };
dc5698e8 DA	118
	119	struct virtio_gpu_device *vgdev;
	120	/* this will expand later */
	121	struct virtqueue *vqs[2];
62fb7a5e	122	u32 num_scanouts, num_capsets;
dc5698e8 DA	123	int ret;
dc5698e8 DA	124
18e51064	125	if (!virtio_has_feature(dev_to_virtio(dev->dev), VIRTIO_F_VERSION_1))
dc5698e8 DA	126	return -ENODEV;
	127
	128	vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL);
	129	if (!vgdev)
	130	return -ENOMEM;
	131
	132	vgdev->ddev = dev;
	133	dev->dev_private = vgdev;
18e51064	134	vgdev->vdev = dev_to_virtio(dev->dev);
dc5698e8 DA	135	vgdev->dev = dev->dev;
	136
	137	spin_lock_init(&vgdev->display_info_lock);
1938d1ae MW	138	ida_init(&vgdev->ctx_id_ida);
1938d1ae MW	139	ida_init(&vgdev->resource_ida);
dc5698e8 DA	140	init_waitqueue_head(&vgdev->resp_wq);
	141	virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func);
	142	virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func);
	143
f54d1867	144	vgdev->fence_drv.context = dma_fence_context_alloc(1);
dc5698e8 DA	145	spin_lock_init(&vgdev->fence_drv.lock);
dc5698e8 DA	146	INIT_LIST_HEAD(&vgdev->fence_drv.fences);
62fb7a5e	147	INIT_LIST_HEAD(&vgdev->cap_cache);
dc5698e8 DA	148	INIT_WORK(&vgdev->config_changed_work,
	149	virtio_gpu_config_changed_work_func);
	150
ff2ac58a	151	#ifdef __LITTLE_ENDIAN
62fb7a5e GH	152	if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL))
	153	vgdev->has_virgl_3d = true;
	154	DRM_INFO("virgl 3d acceleration %s\n",
ff2ac58a LV	155	vgdev->has_virgl_3d ? "enabled" : "not supported by host");
	156	#else
	157	DRM_INFO("virgl 3d acceleration not supported by guest\n");
	158	#endif
62fb7a5e	159
9b2bbdb2	160	ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL);
dc5698e8 DA	161	if (ret) {
	162	DRM_ERROR("failed to find virt queues\n");
	163	goto err_vqs;
	164	}
	165	vgdev->ctrlq.vq = vqs[0];
	166	vgdev->cursorq.vq = vqs[1];
	167	ret = virtio_gpu_alloc_vbufs(vgdev);
	168	if (ret) {
	169	DRM_ERROR("failed to alloc vbufs\n");
	170	goto err_vbufs;
	171	}
	172
	173	ret = virtio_gpu_ttm_init(vgdev);
	174	if (ret) {
	175	DRM_ERROR("failed to init ttm %d\n", ret);
	176	goto err_ttm;
	177	}
	178
	179	/* get display info */
	180	virtio_cread(vgdev->vdev, struct virtio_gpu_config,
	181	num_scanouts, &num_scanouts);
	182	vgdev->num_scanouts = min_t(uint32_t, num_scanouts,
	183	VIRTIO_GPU_MAX_SCANOUTS);
	184	if (!vgdev->num_scanouts) {
	185	DRM_ERROR("num_scanouts is zero\n");
	186	ret = -EINVAL;
	187	goto err_scanouts;
	188	}
62fb7a5e GH	189	DRM_INFO("number of scanouts: %d\n", num_scanouts);
	190
	191	virtio_cread(vgdev->vdev, struct virtio_gpu_config,
	192	num_capsets, &num_capsets);
	193	DRM_INFO("number of cap sets: %d\n", num_capsets);
dc5698e8 DA	194
	195	ret = virtio_gpu_modeset_init(vgdev);
	196	if (ret)
	197	goto err_modeset;
	198
	199	virtio_device_ready(vgdev->vdev);
	200	vgdev->vqs_ready = true;
	201
62fb7a5e GH	202	if (num_capsets)
62fb7a5e GH	203	virtio_gpu_get_capsets(vgdev, num_capsets);
441012af DA	204	virtio_gpu_cmd_get_display_info(vgdev);
	205	wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
	206	5 * HZ);
dc5698e8 DA	207	if (virtio_gpu_fbdev)
dc5698e8 DA	208	virtio_gpu_fbdev_init(vgdev);
dc5698e8 DA	209
	210	return 0;
	211
	212	err_modeset:
	213	err_scanouts:
	214	virtio_gpu_ttm_fini(vgdev);
	215	err_ttm:
	216	virtio_gpu_free_vbufs(vgdev);
	217	err_vbufs:
	218	vgdev->vdev->config->del_vqs(vgdev->vdev);
	219	err_vqs:
	220	kfree(vgdev);
	221	return ret;
	222	}
	223
62fb7a5e GH	224	static void virtio_gpu_cleanup_cap_cache(struct virtio_gpu_device *vgdev)
	225	{
	226	struct virtio_gpu_drv_cap_cache cache_ent, tmp;
	227
	228	list_for_each_entry_safe(cache_ent, tmp, &vgdev->cap_cache, head) {
	229	kfree(cache_ent->caps_cache);
	230	kfree(cache_ent);
	231	}
	232	}
	233
11b3c20b	234	void virtio_gpu_driver_unload(struct drm_device *dev)
dc5698e8 DA	235	{
	236	struct virtio_gpu_device *vgdev = dev->dev_private;
	237
	238	vgdev->vqs_ready = false;
	239	flush_work(&vgdev->ctrlq.dequeue_work);
	240	flush_work(&vgdev->cursorq.dequeue_work);
	241	flush_work(&vgdev->config_changed_work);
	242	vgdev->vdev->config->del_vqs(vgdev->vdev);
	243
	244	virtio_gpu_modeset_fini(vgdev);
	245	virtio_gpu_ttm_fini(vgdev);
	246	virtio_gpu_free_vbufs(vgdev);
62fb7a5e GH	247	virtio_gpu_cleanup_cap_cache(vgdev);
62fb7a5e GH	248	kfree(vgdev->capsets);
dc5698e8	249	kfree(vgdev);
dc5698e8	250	}
62fb7a5e GH	251
	252	int virtio_gpu_driver_open(struct drm_device dev, struct drm_file file)
	253	{
	254	struct virtio_gpu_device *vgdev = dev->dev_private;
	255	struct virtio_gpu_fpriv *vfpriv;
6a37c49a	256	int id;
a86f2551	257	char dbgname[TASK_COMM_LEN];
62fb7a5e GH	258
	259	/* can't create contexts without 3d renderer */
	260	if (!vgdev->has_virgl_3d)
	261	return 0;
	262
62fb7a5e GH	263	/* allocate a virt GPU context for this opener */
	264	vfpriv = kzalloc(sizeof(*vfpriv), GFP_KERNEL);
	265	if (!vfpriv)
	266	return -ENOMEM;
	267
a86f2551	268	get_task_comm(dbgname, current);
6a37c49a MW	269	id = virtio_gpu_context_create(vgdev, strlen(dbgname), dbgname);
	270	if (id < 0)
	271	return id;
62fb7a5e GH	272
	273	vfpriv->ctx_id = id;
	274	file->driver_priv = vfpriv;
	275	return 0;
	276	}
	277
	278	void virtio_gpu_driver_postclose(struct drm_device dev, struct drm_file file)
	279	{
	280	struct virtio_gpu_device *vgdev = dev->dev_private;
	281	struct virtio_gpu_fpriv *vfpriv;
	282
	283	if (!vgdev->has_virgl_3d)
	284	return;
	285
	286	vfpriv = file->driver_priv;
	287
	288	virtio_gpu_context_destroy(vgdev, vfpriv->ctx_id);
	289	kfree(vfpriv);
	290	file->driver_priv = NULL;
	291	}