[GitHub/mt8127/android_kernel_alcatel_ttab.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 <drm/drmP.h>
#include <drm/drm_core.h>

#include <linux/pci.h>
#include <linux/export.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;
	if (idx < 0)
		return -EINVAL;

	i = 0;
	mutex_lock(&dev->struct_mutex);
	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;
	i = 0;

	mutex_lock(&dev->struct_mutex);
	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));

	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;

	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;
	case DRM_CAP_DUMB_PREFERRED_DEPTH:
		req->value = dev->mode_config.preferred_depth;
		break;
	case DRM_CAP_DUMB_PREFER_SHADOW:
		req->value = dev->mode_config.prefer_shadow;
		break;
	case DRM_CAP_PRIME:
		req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
		req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
		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;
}
EXPORT_SYMBOL(drm_noop);
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
760285e7 DH	36	#include <drm/drmP.h>
760285e7 DH	37	#include <drm/drm_core.h>
1da177e4	38
760285e7 DH	39	#include <linux/pci.h>
760285e7 DH	40	#include <linux/export.h>
1da177e4 LT	41
	42	/**
	43	* Get the bus id.
b5e89ed5	44	*
1da177e4	45	* \param inode device inode.
6c340eac	46	* \param file_priv DRM file private.
1da177e4 LT	47	* \param cmd command.
	48	* \param arg user argument, pointing to a drm_unique structure.
	49	* \return zero on success or a negative number on failure.
	50	*
	51	* Copies the bus id from drm_device::unique into user space.
	52	*/
c153f45f EA	53	int drm_getunique(struct drm_device dev, void data,
c153f45f EA	54	struct drm_file *file_priv)
1da177e4	55	{
c153f45f	56	struct drm_unique *u = data;
7c1c2871	57	struct drm_master *master = file_priv->master;
1da177e4	58
7c1c2871 DA	59	if (u->unique_len >= master->unique_len) {
7c1c2871 DA	60	if (copy_to_user(u->unique, master->unique, master->unique_len))
1da177e4 LT	61	return -EFAULT;
1da177e4 LT	62	}
7c1c2871	63	u->unique_len = master->unique_len;
c153f45f	64
1da177e4 LT	65	return 0;
	66	}
	67
3fb688fd CW	68	static void
	69	drm_unset_busid(struct drm_device *dev,
	70	struct drm_master *master)
	71	{
	72	kfree(dev->devname);
	73	dev->devname = NULL;
	74
	75	kfree(master->unique);
	76	master->unique = NULL;
	77	master->unique_len = 0;
	78	master->unique_size = 0;
	79	}
	80
1da177e4 LT	81	/**
1da177e4 LT	82	* Set the bus id.
b5e89ed5	83	*
1da177e4	84	* \param inode device inode.
6c340eac	85	* \param file_priv DRM file private.
1da177e4 LT	86	* \param cmd command.
	87	* \param arg user argument, pointing to a drm_unique structure.
	88	* \return zero on success or a negative number on failure.
	89	*
	90	* Copies the bus id from userspace into drm_device::unique, and verifies that
	91	* it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
	92	* in interface version 1.1 and will return EBUSY when setversion has requested
	93	* version 1.1 or greater.
	94	*/
c153f45f EA	95	int drm_setunique(struct drm_device dev, void data,
c153f45f EA	96	struct drm_file *file_priv)
1da177e4	97	{
c153f45f	98	struct drm_unique *u = data;
7c1c2871	99	struct drm_master *master = file_priv->master;
8410ea3b	100	int ret;
1da177e4	101
7c1c2871	102	if (master->unique_len \|\| master->unique)
b5e89ed5	103	return -EBUSY;
1da177e4	104
c153f45f	105	if (!u->unique_len \|\| u->unique_len > 1024)
b5e89ed5	106	return -EINVAL;
1da177e4	107
8410ea3b DA	108	if (!dev->driver->bus->set_unique)
8410ea3b DA	109	return -EINVAL;
b5e89ed5	110
8410ea3b DA	111	ret = dev->driver->bus->set_unique(dev, master, u);
8410ea3b DA	112	if (ret)
3fb688fd	113	goto err;
1da177e4 LT	114
1da177e4 LT	115	return 0;
3fb688fd CW	116
	117	err:
	118	drm_unset_busid(dev, master);
	119	return ret;
1da177e4 LT	120	}
1da177e4 LT	121
7c1c2871	122	static int drm_set_busid(struct drm_device dev, struct drm_file file_priv)
1da177e4	123	{
7c1c2871	124	struct drm_master *master = file_priv->master;
8410ea3b	125	int ret;
3fb688fd CW	126
	127	if (master->unique != NULL)
	128	drm_unset_busid(dev, master);
fe34765b	129
8410ea3b DA	130	ret = dev->driver->bus->set_busid(dev, master);
	131	if (ret)
	132	goto err;
1da177e4	133	return 0;
3fb688fd CW	134	err:
	135	drm_unset_busid(dev, master);
	136	return ret;
1da177e4 LT	137	}
1da177e4 LT	138
1da177e4 LT	139	/**
	140	* Get a mapping information.
	141	*
	142	* \param inode device inode.
6c340eac	143	* \param file_priv DRM file private.
1da177e4 LT	144	* \param cmd command.
1da177e4 LT	145	* \param arg user argument, pointing to a drm_map structure.
b5e89ed5	146	*
1da177e4 LT	147	* \return zero on success or a negative number on failure.
	148	*
	149	* Searches for the mapping with the specified offset and copies its information
	150	* into userspace
	151	*/
c153f45f EA	152	int drm_getmap(struct drm_device dev, void data,
c153f45f EA	153	struct drm_file *file_priv)
1da177e4	154	{
c153f45f	155	struct drm_map *map = data;
55910517	156	struct drm_map_list *r_list = NULL;
1da177e4	157	struct list_head *list;
b5e89ed5 DA	158	int idx;
b5e89ed5 DA	159	int i;
1da177e4	160
c153f45f	161	idx = map->offset;
09b4ea47	162	if (idx < 0)
1da177e4	163	return -EINVAL;
1da177e4 LT	164
1da177e4 LT	165	i = 0;
09b4ea47	166	mutex_lock(&dev->struct_mutex);
bd1b331f	167	list_for_each(list, &dev->maplist) {
b5e89ed5	168	if (i == idx) {
55910517	169	r_list = list_entry(list, struct drm_map_list, head);
1da177e4 LT	170	break;
	171	}
	172	i++;
	173	}
b5e89ed5	174	if (!r_list \|\| !r_list->map) {
30e2fb18	175	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	176	return -EINVAL;
	177	}
	178
c153f45f EA	179	map->offset = r_list->map->offset;
	180	map->size = r_list->map->size;
	181	map->type = r_list->map->type;
	182	map->flags = r_list->map->flags;
	183	map->handle = (void *)(unsigned long) r_list->user_token;
	184	map->mtrr = r_list->map->mtrr;
30e2fb18	185	mutex_unlock(&dev->struct_mutex);
1da177e4	186
1da177e4 LT	187	return 0;
	188	}
	189
	190	/**
	191	* Get client information.
	192	*
	193	* \param inode device inode.
6c340eac	194	* \param file_priv DRM file private.
1da177e4 LT	195	* \param cmd command.
1da177e4 LT	196	* \param arg user argument, pointing to a drm_client structure.
b5e89ed5	197	*
1da177e4 LT	198	* \return zero on success or a negative number on failure.
	199	*
	200	* Searches for the client with the specified index and copies its information
	201	* into userspace
	202	*/
c153f45f EA	203	int drm_getclient(struct drm_device dev, void data,
c153f45f EA	204	struct drm_file *file_priv)
1da177e4	205	{
c153f45f	206	struct drm_client *client = data;
84b1fd10	207	struct drm_file *pt;
b5e89ed5 DA	208	int idx;
b5e89ed5 DA	209	int i;
1da177e4	210
c153f45f	211	idx = client->idx;
bd1b331f	212	i = 0;
09b4ea47 IH	213
09b4ea47 IH	214	mutex_lock(&dev->struct_mutex);
bd1b331f	215	list_for_each_entry(pt, &dev->filelist, lhead) {
b018fcda EA	216	if (i++ >= idx) {
	217	client->auth = pt->authenticated;
	218	client->pid = pt->pid;
	219	client->uid = pt->uid;
	220	client->magic = pt->magic;
	221	client->iocs = pt->ioctl_count;
	222	mutex_unlock(&dev->struct_mutex);
	223
	224	return 0;
	225	}
bd1b331f	226	}
30e2fb18	227	mutex_unlock(&dev->struct_mutex);
1da177e4	228
b018fcda	229	return -EINVAL;
1da177e4 LT	230	}
1da177e4 LT	231
b5e89ed5 DA	232	/**
	233	* Get statistics information.
	234	*
1da177e4	235	* \param inode device inode.
6c340eac	236	* \param file_priv DRM file private.
1da177e4 LT	237	* \param cmd command.
1da177e4 LT	238	* \param arg user argument, pointing to a drm_stats structure.
b5e89ed5	239	*
1da177e4 LT	240	* \return zero on success or a negative number on failure.
1da177e4 LT	241	*/
c153f45f EA	242	int drm_getstats(struct drm_device dev, void data,
c153f45f EA	243	struct drm_file *file_priv)
1da177e4	244	{
c153f45f	245	struct drm_stats *stats = data;
b5e89ed5	246	int i;
1da177e4	247
246a3d18	248	memset(stats, 0, sizeof(*stats));
b5e89ed5	249
1da177e4 LT	250	for (i = 0; i < dev->counters; i++) {
1da177e4 LT	251	if (dev->types[i] == _DRM_STAT_LOCK)
c153f45f	252	stats->data[i].value =
7c1c2871	253	(file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
b5e89ed5	254	else
c153f45f EA	255	stats->data[i].value = atomic_read(&dev->counts[i]);
c153f45f EA	256	stats->data[i].type = dev->types[i];
1da177e4	257	}
b5e89ed5	258
c153f45f	259	stats->count = dev->counters;
1da177e4	260
1da177e4 LT	261	return 0;
	262	}
	263
9f35421e BS	264	/**
	265	* Get device/driver capabilities
	266	*/
	267	int drm_getcap(struct drm_device dev, void data, struct drm_file *file_priv)
	268	{
	269	struct drm_get_cap *req = data;
	270
	271	req->value = 0;
e73f88af DA	272	switch (req->capability) {
	273	case DRM_CAP_DUMB_BUFFER:
	274	if (dev->driver->dumb_create)
	275	req->value = 1;
	276	break;
51eab416	277	case DRM_CAP_VBLANK_HIGH_CRTC:
19b01b5f IH	278	req->value = 1;
19b01b5f IH	279	break;
019d96cb DA	280	case DRM_CAP_DUMB_PREFERRED_DEPTH:
	281	req->value = dev->mode_config.preferred_depth;
	282	break;
	283	case DRM_CAP_DUMB_PREFER_SHADOW:
	284	req->value = dev->mode_config.prefer_shadow;
	285	break;
4271a409 DA	286	case DRM_CAP_PRIME:
	287	req->value \|= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
	288	req->value \|= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
	289	break;
e73f88af DA	290	default:
	291	return -EINVAL;
	292	}
9f35421e BS	293	return 0;
	294	}
	295
1da177e4 LT	296	/**
	297	* Setversion ioctl.
	298	*
	299	* \param inode device inode.
6c340eac	300	* \param file_priv DRM file private.
1da177e4 LT	301	* \param cmd command.
	302	* \param arg user argument, pointing to a drm_lock structure.
	303	* \return zero on success or negative number on failure.
	304	*
	305	* Sets the requested interface version
	306	*/
c153f45f	307	int drm_setversion(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	308	{
c153f45f EA	309	struct drm_set_version *sv = data;
	310	int if_version, retcode = 0;
	311
	312	if (sv->drm_di_major != -1) {
	313	if (sv->drm_di_major != DRM_IF_MAJOR \|\|
	314	sv->drm_di_minor < 0 \|\| sv->drm_di_minor > DRM_IF_MINOR) {
	315	retcode = -EINVAL;
	316	goto done;
	317	}
	318	if_version = DRM_IF_VERSION(sv->drm_di_major,
	319	sv->drm_di_minor);
3d77461e	320	dev->if_version = max(if_version, dev->if_version);
c153f45f	321	if (sv->drm_di_minor >= 1) {
1da177e4 LT	322	/*
1da177e4 LT	323	* Version 1.1 includes tying of DRM to specific device
c17c2f89	324	* Version 1.4 has proper PCI domain support
1da177e4	325	*/
3fb688fd CW	326	retcode = drm_set_busid(dev, file_priv);
	327	if (retcode)
	328	goto done;
1da177e4 LT	329	}
	330	}
	331
c153f45f EA	332	if (sv->drm_dd_major != -1) {
	333	if (sv->drm_dd_major != dev->driver->major \|\|
	334	sv->drm_dd_minor < 0 \|\| sv->drm_dd_minor >
	335	dev->driver->minor) {
	336	retcode = -EINVAL;
	337	goto done;
	338	}
1da177e4 LT	339
1da177e4 LT	340	if (dev->driver->set_version)
c153f45f	341	dev->driver->set_version(dev, sv);
1da177e4	342	}
c153f45f EA	343
	344	done:
	345	sv->drm_di_major = DRM_IF_MAJOR;
	346	sv->drm_di_minor = DRM_IF_MINOR;
	347	sv->drm_dd_major = dev->driver->major;
	348	sv->drm_dd_minor = dev->driver->minor;
	349
	350	return retcode;
1da177e4 LT	351	}
	352
	353	/** No-op ioctl. */
c153f45f EA	354	int drm_noop(struct drm_device dev, void data,
c153f45f EA	355	struct drm_file *file_priv)
1da177e4 LT	356	{
	357	DRM_DEBUG("\n");
	358	return 0;
	359	}
b2c606fe	360	EXPORT_SYMBOL(drm_noop);