[deliverable/linux.git] / drivers / gpu / drm / drm_ioctl.c

/**
 * \file drm_ioctl.c
 * IOCTL processing for DRM
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Created: Fri Jan  8 09:01:26 1999 by faith@valinux.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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
 * VA LINUX SYSTEMS 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 "drmP.h"
#include "drm_core.h"

#include "linux/pci.h"

/**
 * Get the bus id.
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_unique structure.
 * \return zero on success or a negative number on failure.
 *
 * Copies the bus id from drm_device::unique into user space.
 */
int drm_getunique(struct drm_device *dev, void *data,
		  struct drm_file *file_priv)
{
	struct drm_unique *u = data;
	struct drm_master *master = file_priv->master;

	if (u->unique_len >= master->unique_len) {
		if (copy_to_user(u->unique, master->unique, master->unique_len))
			return -EFAULT;
	}
	u->unique_len = master->unique_len;

	return 0;
}

static void
drm_unset_busid(struct drm_device *dev,
		struct drm_master *master)
{
	kfree(dev->devname);
	dev->devname = NULL;

	kfree(master->unique);
	master->unique = NULL;
	master->unique_len = 0;
	master->unique_size = 0;
}

/**
 * Set the bus id.
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_unique structure.
 * \return zero on success or a negative number on failure.
 *
 * Copies the bus id from userspace into drm_device::unique, and verifies that
 * it matches the device this DRM is attached to (EINVAL otherwise).  Deprecated
 * in interface version 1.1 and will return EBUSY when setversion has requested
 * version 1.1 or greater.
 */
int drm_setunique(struct drm_device *dev, void *data,
		  struct drm_file *file_priv)
{
	struct drm_unique *u = data;
	struct drm_master *master = file_priv->master;
	int ret;

	if (master->unique_len || master->unique)
		return -EBUSY;

	if (!u->unique_len || u->unique_len > 1024)
		return -EINVAL;

	if (!dev->driver->bus->set_unique)
		return -EINVAL;

	ret = dev->driver->bus->set_unique(dev, master, u);
	if (ret)
		goto err;

	return 0;

err:
	drm_unset_busid(dev, master);
	return ret;
}

static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
{
	struct drm_master *master = file_priv->master;
	int ret;

	if (master->unique != NULL)
		drm_unset_busid(dev, master);

	ret = dev->driver->bus->set_busid(dev, master);
	if (ret)
		goto err;
	return 0;
err:
	drm_unset_busid(dev, master);
	return ret;
}

/**
 * Get a mapping information.
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_map structure.
 *
 * \return zero on success or a negative number on failure.
 *
 * Searches for the mapping with the specified offset and copies its information
 * into userspace
 */
int drm_getmap(struct drm_device *dev, void *data,
	       struct drm_file *file_priv)
{
	struct drm_map *map = data;
	struct drm_map_list *r_list = NULL;
	struct list_head *list;
	int idx;
	int i;

	idx = map->offset;

	mutex_lock(&dev->struct_mutex);
	if (idx < 0) {
		mutex_unlock(&dev->struct_mutex);
		return -EINVAL;
	}

	i = 0;
	list_for_each(list, &dev->maplist) {
		if (i == idx) {
			r_list = list_entry(list, struct drm_map_list, head);
			break;
		}
		i++;
	}
	if (!r_list || !r_list->map) {
		mutex_unlock(&dev->struct_mutex);
		return -EINVAL;
	}

	map->offset = r_list->map->offset;
	map->size = r_list->map->size;
	map->type = r_list->map->type;
	map->flags = r_list->map->flags;
	map->handle = (void *)(unsigned long) r_list->user_token;
	map->mtrr = r_list->map->mtrr;
	mutex_unlock(&dev->struct_mutex);

	return 0;
}

/**
 * Get client information.
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_client structure.
 *
 * \return zero on success or a negative number on failure.
 *
 * Searches for the client with the specified index and copies its information
 * into userspace
 */
int drm_getclient(struct drm_device *dev, void *data,
		  struct drm_file *file_priv)
{
	struct drm_client *client = data;
	struct drm_file *pt;
	int idx;
	int i;

	idx = client->idx;
	mutex_lock(&dev->struct_mutex);

	i = 0;
	list_for_each_entry(pt, &dev->filelist, lhead) {
		if (i++ >= idx) {
			client->auth = pt->authenticated;
			client->pid = pt->pid;
			client->uid = pt->uid;
			client->magic = pt->magic;
			client->iocs = pt->ioctl_count;
			mutex_unlock(&dev->struct_mutex);

			return 0;
		}
	}
	mutex_unlock(&dev->struct_mutex);

	return -EINVAL;
}

/**
 * Get statistics information.
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_stats structure.
 *
 * \return zero on success or a negative number on failure.
 */
int drm_getstats(struct drm_device *dev, void *data,
		 struct drm_file *file_priv)
{
	struct drm_stats *stats = data;
	int i;

	memset(stats, 0, sizeof(*stats));

	mutex_lock(&dev->struct_mutex);

	for (i = 0; i < dev->counters; i++) {
		if (dev->types[i] == _DRM_STAT_LOCK)
			stats->data[i].value =
			    (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
		else
			stats->data[i].value = atomic_read(&dev->counts[i]);
		stats->data[i].type = dev->types[i];
	}

	stats->count = dev->counters;

	mutex_unlock(&dev->struct_mutex);

	return 0;
}

/**
 * Get device/driver capabilities
 */
int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	struct drm_get_cap *req = data;

	req->value = 0;
	switch (req->capability) {
	case DRM_CAP_DUMB_BUFFER:
		if (dev->driver->dumb_create)
			req->value = 1;
		break;
	case DRM_CAP_VBLANK_HIGH_CRTC:
		req->value = 1;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/**
 * Setversion ioctl.
 *
 * \param inode device inode.
 * \param file_priv DRM file private.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_lock structure.
 * \return zero on success or negative number on failure.
 *
 * Sets the requested interface version
 */
int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
	struct drm_set_version *sv = data;
	int if_version, retcode = 0;

	if (sv->drm_di_major != -1) {
		if (sv->drm_di_major != DRM_IF_MAJOR ||
		    sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
			retcode = -EINVAL;
			goto done;
		}
		if_version = DRM_IF_VERSION(sv->drm_di_major,
					    sv->drm_di_minor);
		dev->if_version = max(if_version, dev->if_version);
		if (sv->drm_di_minor >= 1) {
			/*
			 * Version 1.1 includes tying of DRM to specific device
			 * Version 1.4 has proper PCI domain support
			 */
			retcode = drm_set_busid(dev, file_priv);
			if (retcode)
				goto done;
		}
	}

	if (sv->drm_dd_major != -1) {
		if (sv->drm_dd_major != dev->driver->major ||
		    sv->drm_dd_minor < 0 || sv->drm_dd_minor >
		    dev->driver->minor) {
			retcode = -EINVAL;
			goto done;
		}

		if (dev->driver->set_version)
			dev->driver->set_version(dev, sv);
	}

done:
	sv->drm_di_major = DRM_IF_MAJOR;
	sv->drm_di_minor = DRM_IF_MINOR;
	sv->drm_dd_major = dev->driver->major;
	sv->drm_dd_minor = dev->driver->minor;

	return retcode;
}

/** No-op ioctl. */
int drm_noop(struct drm_device *dev, void *data,
	     struct drm_file *file_priv)
{
	DRM_DEBUG("\n");
	return 0;
}
Commit	Line	Data
1da177e4	1	/**
b5e89ed5	2	* \file drm_ioctl.c
1da177e4 LT	3	* IOCTL processing for DRM
	4	*
	5	* \author Rickard E. (Rik) Faith <faith@valinux.com>
	6	* \author Gareth Hughes <gareth@valinux.com>
	7	*/
	8
	9	/*
	10	* Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
	11	*
	12	* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
	13	* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
	14	* All Rights Reserved.
	15	*
	16	* Permission is hereby granted, free of charge, to any person obtaining a
	17	* copy of this software and associated documentation files (the "Software"),
	18	* to deal in the Software without restriction, including without limitation
	19	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	20	* and/or sell copies of the Software, and to permit persons to whom the
	21	* Software is furnished to do so, subject to the following conditions:
	22	*
	23	* The above copyright notice and this permission notice (including the next
	24	* paragraph) shall be included in all copies or substantial portions of the
	25	* Software.
	26	*
	27	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	28	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	29	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	30	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	31	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	32	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	33	* OTHER DEALINGS IN THE SOFTWARE.
	34	*/
	35
	36	#include "drmP.h"
	37	#include "drm_core.h"
	38
	39	#include "linux/pci.h"
	40
	41	/**
	42	* Get the bus id.
b5e89ed5	43	*
1da177e4	44	* \param inode device inode.
6c340eac	45	* \param file_priv DRM file private.
1da177e4 LT	46	* \param cmd command.
	47	* \param arg user argument, pointing to a drm_unique structure.
	48	* \return zero on success or a negative number on failure.
	49	*
	50	* Copies the bus id from drm_device::unique into user space.
	51	*/
c153f45f EA	52	int drm_getunique(struct drm_device dev, void data,
c153f45f EA	53	struct drm_file *file_priv)
1da177e4	54	{
c153f45f	55	struct drm_unique *u = data;
7c1c2871	56	struct drm_master *master = file_priv->master;
1da177e4	57
7c1c2871 DA	58	if (u->unique_len >= master->unique_len) {
7c1c2871 DA	59	if (copy_to_user(u->unique, master->unique, master->unique_len))
1da177e4 LT	60	return -EFAULT;
1da177e4 LT	61	}
7c1c2871	62	u->unique_len = master->unique_len;
c153f45f	63
1da177e4 LT	64	return 0;
	65	}
	66
3fb688fd CW	67	static void
	68	drm_unset_busid(struct drm_device *dev,
	69	struct drm_master *master)
	70	{
	71	kfree(dev->devname);
	72	dev->devname = NULL;
	73
	74	kfree(master->unique);
	75	master->unique = NULL;
	76	master->unique_len = 0;
	77	master->unique_size = 0;
	78	}
	79
1da177e4 LT	80	/**
1da177e4 LT	81	* Set the bus id.
b5e89ed5	82	*
1da177e4	83	* \param inode device inode.
6c340eac	84	* \param file_priv DRM file private.
1da177e4 LT	85	* \param cmd command.
	86	* \param arg user argument, pointing to a drm_unique structure.
	87	* \return zero on success or a negative number on failure.
	88	*
	89	* Copies the bus id from userspace into drm_device::unique, and verifies that
	90	* it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
	91	* in interface version 1.1 and will return EBUSY when setversion has requested
	92	* version 1.1 or greater.
	93	*/
c153f45f EA	94	int drm_setunique(struct drm_device dev, void data,
c153f45f EA	95	struct drm_file *file_priv)
1da177e4	96	{
c153f45f	97	struct drm_unique *u = data;
7c1c2871	98	struct drm_master *master = file_priv->master;
8410ea3b	99	int ret;
1da177e4	100
7c1c2871	101	if (master->unique_len \|\| master->unique)
b5e89ed5	102	return -EBUSY;
1da177e4	103
c153f45f	104	if (!u->unique_len \|\| u->unique_len > 1024)
b5e89ed5	105	return -EINVAL;
1da177e4	106
8410ea3b DA	107	if (!dev->driver->bus->set_unique)
8410ea3b DA	108	return -EINVAL;
b5e89ed5	109
8410ea3b DA	110	ret = dev->driver->bus->set_unique(dev, master, u);
8410ea3b DA	111	if (ret)
3fb688fd	112	goto err;
1da177e4 LT	113
1da177e4 LT	114	return 0;
3fb688fd CW	115
	116	err:
	117	drm_unset_busid(dev, master);
	118	return ret;
1da177e4 LT	119	}
1da177e4 LT	120
7c1c2871	121	static int drm_set_busid(struct drm_device dev, struct drm_file file_priv)
1da177e4	122	{
7c1c2871	123	struct drm_master *master = file_priv->master;
8410ea3b	124	int ret;
3fb688fd CW	125
	126	if (master->unique != NULL)
	127	drm_unset_busid(dev, master);
fe34765b	128
8410ea3b DA	129	ret = dev->driver->bus->set_busid(dev, master);
	130	if (ret)
	131	goto err;
1da177e4	132	return 0;
3fb688fd CW	133	err:
	134	drm_unset_busid(dev, master);
	135	return ret;
1da177e4 LT	136	}
1da177e4 LT	137
1da177e4 LT	138	/**
	139	* Get a mapping information.
	140	*
	141	* \param inode device inode.
6c340eac	142	* \param file_priv DRM file private.
1da177e4 LT	143	* \param cmd command.
1da177e4 LT	144	* \param arg user argument, pointing to a drm_map structure.
b5e89ed5	145	*
1da177e4 LT	146	* \return zero on success or a negative number on failure.
	147	*
	148	* Searches for the mapping with the specified offset and copies its information
	149	* into userspace
	150	*/
c153f45f EA	151	int drm_getmap(struct drm_device dev, void data,
c153f45f EA	152	struct drm_file *file_priv)
1da177e4	153	{
c153f45f	154	struct drm_map *map = data;
55910517	155	struct drm_map_list *r_list = NULL;
1da177e4	156	struct list_head *list;
b5e89ed5 DA	157	int idx;
b5e89ed5 DA	158	int i;
1da177e4	159
c153f45f	160	idx = map->offset;
1da177e4	161
30e2fb18	162	mutex_lock(&dev->struct_mutex);
1da177e4	163	if (idx < 0) {
30e2fb18	164	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	165	return -EINVAL;
	166	}
	167
	168	i = 0;
bd1b331f	169	list_for_each(list, &dev->maplist) {
b5e89ed5	170	if (i == idx) {
55910517	171	r_list = list_entry(list, struct drm_map_list, head);
1da177e4 LT	172	break;
	173	}
	174	i++;
	175	}
b5e89ed5	176	if (!r_list \|\| !r_list->map) {
30e2fb18	177	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	178	return -EINVAL;
	179	}
	180
c153f45f EA	181	map->offset = r_list->map->offset;
	182	map->size = r_list->map->size;
	183	map->type = r_list->map->type;
	184	map->flags = r_list->map->flags;
	185	map->handle = (void *)(unsigned long) r_list->user_token;
	186	map->mtrr = r_list->map->mtrr;
30e2fb18	187	mutex_unlock(&dev->struct_mutex);
1da177e4	188
1da177e4 LT	189	return 0;
	190	}
	191
	192	/**
	193	* Get client information.
	194	*
	195	* \param inode device inode.
6c340eac	196	* \param file_priv DRM file private.
1da177e4 LT	197	* \param cmd command.
1da177e4 LT	198	* \param arg user argument, pointing to a drm_client structure.
b5e89ed5	199	*
1da177e4 LT	200	* \return zero on success or a negative number on failure.
	201	*
	202	* Searches for the client with the specified index and copies its information
	203	* into userspace
	204	*/
c153f45f EA	205	int drm_getclient(struct drm_device dev, void data,
c153f45f EA	206	struct drm_file *file_priv)
1da177e4	207	{
c153f45f	208	struct drm_client *client = data;
84b1fd10	209	struct drm_file *pt;
b5e89ed5 DA	210	int idx;
b5e89ed5 DA	211	int i;
1da177e4	212
c153f45f	213	idx = client->idx;
30e2fb18	214	mutex_lock(&dev->struct_mutex);
bc5f4523	215
bd1b331f DA	216	i = 0;
bd1b331f DA	217	list_for_each_entry(pt, &dev->filelist, lhead) {
b018fcda EA	218	if (i++ >= idx) {
	219	client->auth = pt->authenticated;
	220	client->pid = pt->pid;
	221	client->uid = pt->uid;
	222	client->magic = pt->magic;
	223	client->iocs = pt->ioctl_count;
	224	mutex_unlock(&dev->struct_mutex);
	225
	226	return 0;
	227	}
bd1b331f	228	}
30e2fb18	229	mutex_unlock(&dev->struct_mutex);
1da177e4	230
b018fcda	231	return -EINVAL;
1da177e4 LT	232	}
1da177e4 LT	233
b5e89ed5 DA	234	/**
	235	* Get statistics information.
	236	*
1da177e4	237	* \param inode device inode.
6c340eac	238	* \param file_priv DRM file private.
1da177e4 LT	239	* \param cmd command.
1da177e4 LT	240	* \param arg user argument, pointing to a drm_stats structure.
b5e89ed5	241	*
1da177e4 LT	242	* \return zero on success or a negative number on failure.
1da177e4 LT	243	*/
c153f45f EA	244	int drm_getstats(struct drm_device dev, void data,
c153f45f EA	245	struct drm_file *file_priv)
1da177e4	246	{
c153f45f	247	struct drm_stats *stats = data;
b5e89ed5	248	int i;
1da177e4	249
246a3d18	250	memset(stats, 0, sizeof(*stats));
b5e89ed5	251
30e2fb18	252	mutex_lock(&dev->struct_mutex);
1da177e4 LT	253
	254	for (i = 0; i < dev->counters; i++) {
	255	if (dev->types[i] == _DRM_STAT_LOCK)
c153f45f	256	stats->data[i].value =
7c1c2871	257	(file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
b5e89ed5	258	else
c153f45f EA	259	stats->data[i].value = atomic_read(&dev->counts[i]);
c153f45f EA	260	stats->data[i].type = dev->types[i];
1da177e4	261	}
b5e89ed5	262
c153f45f	263	stats->count = dev->counters;
1da177e4	264
30e2fb18	265	mutex_unlock(&dev->struct_mutex);
1da177e4	266
1da177e4 LT	267	return 0;
	268	}
	269
9f35421e BS	270	/**
	271	* Get device/driver capabilities
	272	*/
	273	int drm_getcap(struct drm_device dev, void data, struct drm_file *file_priv)
	274	{
	275	struct drm_get_cap *req = data;
	276
	277	req->value = 0;
e73f88af DA	278	switch (req->capability) {
	279	case DRM_CAP_DUMB_BUFFER:
	280	if (dev->driver->dumb_create)
	281	req->value = 1;
	282	break;
51eab416	283	case DRM_CAP_VBLANK_HIGH_CRTC:
19b01b5f IH	284	req->value = 1;
19b01b5f IH	285	break;
e73f88af DA	286	default:
	287	return -EINVAL;
	288	}
9f35421e BS	289	return 0;
	290	}
	291
1da177e4 LT	292	/**
	293	* Setversion ioctl.
	294	*
	295	* \param inode device inode.
6c340eac	296	* \param file_priv DRM file private.
1da177e4 LT	297	* \param cmd command.
	298	* \param arg user argument, pointing to a drm_lock structure.
	299	* \return zero on success or negative number on failure.
	300	*
	301	* Sets the requested interface version
	302	*/
c153f45f	303	int drm_setversion(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	304	{
c153f45f EA	305	struct drm_set_version *sv = data;
	306	int if_version, retcode = 0;
	307
	308	if (sv->drm_di_major != -1) {
	309	if (sv->drm_di_major != DRM_IF_MAJOR \|\|
	310	sv->drm_di_minor < 0 \|\| sv->drm_di_minor > DRM_IF_MINOR) {
	311	retcode = -EINVAL;
	312	goto done;
	313	}
	314	if_version = DRM_IF_VERSION(sv->drm_di_major,
	315	sv->drm_di_minor);
3d77461e	316	dev->if_version = max(if_version, dev->if_version);
c153f45f	317	if (sv->drm_di_minor >= 1) {
1da177e4 LT	318	/*
1da177e4 LT	319	* Version 1.1 includes tying of DRM to specific device
c17c2f89	320	* Version 1.4 has proper PCI domain support
1da177e4	321	*/
3fb688fd CW	322	retcode = drm_set_busid(dev, file_priv);
	323	if (retcode)
	324	goto done;
1da177e4 LT	325	}
	326	}
	327
c153f45f EA	328	if (sv->drm_dd_major != -1) {
	329	if (sv->drm_dd_major != dev->driver->major \|\|
	330	sv->drm_dd_minor < 0 \|\| sv->drm_dd_minor >
	331	dev->driver->minor) {
	332	retcode = -EINVAL;
	333	goto done;
	334	}
1da177e4 LT	335
1da177e4 LT	336	if (dev->driver->set_version)
c153f45f	337	dev->driver->set_version(dev, sv);
1da177e4	338	}
c153f45f EA	339
	340	done:
	341	sv->drm_di_major = DRM_IF_MAJOR;
	342	sv->drm_di_minor = DRM_IF_MINOR;
	343	sv->drm_dd_major = dev->driver->major;
	344	sv->drm_dd_minor = dev->driver->minor;
	345
	346	return retcode;
1da177e4 LT	347	}
	348
	349	/** No-op ioctl. */
c153f45f EA	350	int drm_noop(struct drm_device dev, void data,
c153f45f EA	351	struct drm_file *file_priv)
1da177e4 LT	352	{
	353	DRM_DEBUG("\n");
	354	return 0;
	355	}