[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 domain, bus, slot, func, ret;

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

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

	master->unique_len = u->unique_len;
	master->unique_size = u->unique_len + 1;
	master->unique = kmalloc(master->unique_size, GFP_KERNEL);
	if (!master->unique) {
		ret = -ENOMEM;
		goto err;
	}

	if (copy_from_user(master->unique, u->unique, master->unique_len)) {
		ret = -EFAULT;
		goto err;
	}

	master->unique[master->unique_len] = '\0';

	dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) +
			       strlen(master->unique) + 2, GFP_KERNEL);
	if (!dev->devname) {
		ret = -ENOMEM;
		goto err;
	}

	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
		master->unique);

	/* Return error if the busid submitted doesn't match the device's actual
	 * busid.
	 */
	ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
	if (ret != 3) {
		ret = -EINVAL;
		goto err;
	}

	domain = bus >> 8;
	bus &= 0xff;

	if ((domain != drm_get_pci_domain(dev)) ||
	    (bus != dev->pdev->bus->number) ||
	    (slot != PCI_SLOT(dev->pdev->devfn)) ||
	    (func != PCI_FUNC(dev->pdev->devfn))) {
		ret = -EINVAL;
		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 len, ret;

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

	if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE)) {
		master->unique_len = 10 + strlen(dev->platformdev->name);
		master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);

		if (master->unique == NULL)
			return -ENOMEM;

		len = snprintf(master->unique, master->unique_len,
			"platform:%s", dev->platformdev->name);

		if (len > master->unique_len) {
			DRM_ERROR("Unique buffer overflowed\n");
			ret = -EINVAL;
			goto err;
		}

		dev->devname =
			kmalloc(strlen(dev->platformdev->name) +
				master->unique_len + 2, GFP_KERNEL);

		if (dev->devname == NULL) {
			ret = -ENOMEM;
			goto err;
		}

		sprintf(dev->devname, "%s@%s", dev->platformdev->name,
			master->unique);

	} else {
		master->unique_len = 40;
		master->unique_size = master->unique_len;
		master->unique = kmalloc(master->unique_size, GFP_KERNEL);
		if (master->unique == NULL)
			return -ENOMEM;

		len = snprintf(master->unique, master->unique_len,
			"pci:%04x:%02x:%02x.%d",
			drm_get_pci_domain(dev),
			dev->pdev->bus->number,
			PCI_SLOT(dev->pdev->devfn),
			PCI_FUNC(dev->pdev->devfn));
		if (len >= master->unique_len) {
			DRM_ERROR("buffer overflow");
			ret = -EINVAL;
			goto err;
		} else
			master->unique_len = len;

		dev->devname =
			kmalloc(strlen(dev->driver->pci_driver.name) +
				master->unique_len + 2, GFP_KERNEL);

		if (dev->devname == NULL) {
			ret = -ENOMEM;
			goto err;
		}

		sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
			master->unique);
	}

	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;
}

/**
 * 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;
b5e89ed5	99	int domain, bus, slot, func, 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
7c1c2871	107	master->unique_len = u->unique_len;
1147c9cd	108	master->unique_size = u->unique_len + 1;
9a298b2a	109	master->unique = kmalloc(master->unique_size, GFP_KERNEL);
3fb688fd CW	110	if (!master->unique) {
	111	ret = -ENOMEM;
	112	goto err;
	113	}
	114
	115	if (copy_from_user(master->unique, u->unique, master->unique_len)) {
	116	ret = -EFAULT;
	117	goto err;
	118	}
1da177e4	119
7c1c2871	120	master->unique[master->unique_len] = '\0';
1da177e4	121
9a298b2a EA	122	dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) +
9a298b2a EA	123	strlen(master->unique) + 2, GFP_KERNEL);
3fb688fd CW	124	if (!dev->devname) {
	125	ret = -ENOMEM;
	126	goto err;
	127	}
1da177e4	128
b5e89ed5	129	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
7c1c2871	130	master->unique);
1da177e4 LT	131
	132	/* Return error if the busid submitted doesn't match the device's actual
	133	* busid.
	134	*/
7c1c2871	135	ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
3fb688fd CW	136	if (ret != 3) {
	137	ret = -EINVAL;
	138	goto err;
	139	}
	140
1da177e4 LT	141	domain = bus >> 8;
1da177e4 LT	142	bus &= 0xff;
b5e89ed5	143
33229601	144	if ((domain != drm_get_pci_domain(dev)) \|\|
242ef0e1 D	145	(bus != dev->pdev->bus->number) \|\|
242ef0e1 D	146	(slot != PCI_SLOT(dev->pdev->devfn)) \|\|
3fb688fd CW	147	(func != PCI_FUNC(dev->pdev->devfn))) {
	148	ret = -EINVAL;
	149	goto err;
	150	}
1da177e4 LT	151
1da177e4 LT	152	return 0;
3fb688fd CW	153
	154	err:
	155	drm_unset_busid(dev, master);
	156	return ret;
1da177e4 LT	157	}
1da177e4 LT	158
7c1c2871	159	static int drm_set_busid(struct drm_device dev, struct drm_file file_priv)
1da177e4	160	{
7c1c2871	161	struct drm_master *master = file_priv->master;
3fb688fd CW	162	int len, ret;
	163
	164	if (master->unique != NULL)
	165	drm_unset_busid(dev, master);
fe34765b	166
dcdb1674 JC	167	if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE)) {
	168	master->unique_len = 10 + strlen(dev->platformdev->name);
	169	master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
	170
	171	if (master->unique == NULL)
	172	return -ENOMEM;
	173
	174	len = snprintf(master->unique, master->unique_len,
	175	"platform:%s", dev->platformdev->name);
	176
3fb688fd	177	if (len > master->unique_len) {
dcdb1674	178	DRM_ERROR("Unique buffer overflowed\n");
3fb688fd CW	179	ret = -EINVAL;
	180	goto err;
	181	}
dcdb1674 JC	182
	183	dev->devname =
	184	kmalloc(strlen(dev->platformdev->name) +
	185	master->unique_len + 2, GFP_KERNEL);
	186
3fb688fd CW	187	if (dev->devname == NULL) {
	188	ret = -ENOMEM;
	189	goto err;
	190	}
dcdb1674 JC	191
	192	sprintf(dev->devname, "%s@%s", dev->platformdev->name,
	193	master->unique);
	194
	195	} else {
	196	master->unique_len = 40;
	197	master->unique_size = master->unique_len;
	198	master->unique = kmalloc(master->unique_size, GFP_KERNEL);
	199	if (master->unique == NULL)
	200	return -ENOMEM;
	201
	202	len = snprintf(master->unique, master->unique_len,
	203	"pci:%04x:%02x:%02x.%d",
	204	drm_get_pci_domain(dev),
	205	dev->pdev->bus->number,
	206	PCI_SLOT(dev->pdev->devfn),
	207	PCI_FUNC(dev->pdev->devfn));
3fb688fd	208	if (len >= master->unique_len) {
dcdb1674	209	DRM_ERROR("buffer overflow");
3fb688fd CW	210	ret = -EINVAL;
	211	goto err;
	212	} else
dcdb1674 JC	213	master->unique_len = len;
	214
	215	dev->devname =
	216	kmalloc(strlen(dev->driver->pci_driver.name) +
	217	master->unique_len + 2, GFP_KERNEL);
	218
3fb688fd CW	219	if (dev->devname == NULL) {
	220	ret = -ENOMEM;
	221	goto err;
	222	}
dcdb1674 JC	223
	224	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
	225	master->unique);
	226	}
1da177e4 LT	227
1da177e4 LT	228	return 0;
3fb688fd CW	229
	230	err:
	231	drm_unset_busid(dev, master);
	232	return ret;
1da177e4 LT	233	}
1da177e4 LT	234
1da177e4 LT	235	/**
	236	* Get a mapping information.
	237	*
	238	* \param inode device inode.
6c340eac	239	* \param file_priv DRM file private.
1da177e4 LT	240	* \param cmd command.
1da177e4 LT	241	* \param arg user argument, pointing to a drm_map structure.
b5e89ed5	242	*
1da177e4 LT	243	* \return zero on success or a negative number on failure.
	244	*
	245	* Searches for the mapping with the specified offset and copies its information
	246	* into userspace
	247	*/
c153f45f EA	248	int drm_getmap(struct drm_device dev, void data,
c153f45f EA	249	struct drm_file *file_priv)
1da177e4	250	{
c153f45f	251	struct drm_map *map = data;
55910517	252	struct drm_map_list *r_list = NULL;
1da177e4	253	struct list_head *list;
b5e89ed5 DA	254	int idx;
b5e89ed5 DA	255	int i;
1da177e4	256
c153f45f	257	idx = map->offset;
1da177e4	258
30e2fb18	259	mutex_lock(&dev->struct_mutex);
1da177e4	260	if (idx < 0) {
30e2fb18	261	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	262	return -EINVAL;
	263	}
	264
	265	i = 0;
bd1b331f	266	list_for_each(list, &dev->maplist) {
b5e89ed5	267	if (i == idx) {
55910517	268	r_list = list_entry(list, struct drm_map_list, head);
1da177e4 LT	269	break;
	270	}
	271	i++;
	272	}
b5e89ed5	273	if (!r_list \|\| !r_list->map) {
30e2fb18	274	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	275	return -EINVAL;
	276	}
	277
c153f45f EA	278	map->offset = r_list->map->offset;
	279	map->size = r_list->map->size;
	280	map->type = r_list->map->type;
	281	map->flags = r_list->map->flags;
	282	map->handle = (void *)(unsigned long) r_list->user_token;
	283	map->mtrr = r_list->map->mtrr;
30e2fb18	284	mutex_unlock(&dev->struct_mutex);
1da177e4	285
1da177e4 LT	286	return 0;
	287	}
	288
	289	/**
	290	* Get client information.
	291	*
	292	* \param inode device inode.
6c340eac	293	* \param file_priv DRM file private.
1da177e4 LT	294	* \param cmd command.
1da177e4 LT	295	* \param arg user argument, pointing to a drm_client structure.
b5e89ed5	296	*
1da177e4 LT	297	* \return zero on success or a negative number on failure.
	298	*
	299	* Searches for the client with the specified index and copies its information
	300	* into userspace
	301	*/
c153f45f EA	302	int drm_getclient(struct drm_device dev, void data,
c153f45f EA	303	struct drm_file *file_priv)
1da177e4	304	{
c153f45f	305	struct drm_client *client = data;
84b1fd10	306	struct drm_file *pt;
b5e89ed5 DA	307	int idx;
b5e89ed5 DA	308	int i;
1da177e4	309
c153f45f	310	idx = client->idx;
30e2fb18	311	mutex_lock(&dev->struct_mutex);
bc5f4523	312
bd1b331f DA	313	i = 0;
bd1b331f DA	314	list_for_each_entry(pt, &dev->filelist, lhead) {
b018fcda EA	315	if (i++ >= idx) {
	316	client->auth = pt->authenticated;
	317	client->pid = pt->pid;
	318	client->uid = pt->uid;
	319	client->magic = pt->magic;
	320	client->iocs = pt->ioctl_count;
	321	mutex_unlock(&dev->struct_mutex);
	322
	323	return 0;
	324	}
bd1b331f	325	}
30e2fb18	326	mutex_unlock(&dev->struct_mutex);
1da177e4	327
b018fcda	328	return -EINVAL;
1da177e4 LT	329	}
1da177e4 LT	330
b5e89ed5 DA	331	/**
	332	* Get statistics information.
	333	*
1da177e4	334	* \param inode device inode.
6c340eac	335	* \param file_priv DRM file private.
1da177e4 LT	336	* \param cmd command.
1da177e4 LT	337	* \param arg user argument, pointing to a drm_stats structure.
b5e89ed5	338	*
1da177e4 LT	339	* \return zero on success or a negative number on failure.
1da177e4 LT	340	*/
c153f45f EA	341	int drm_getstats(struct drm_device dev, void data,
c153f45f EA	342	struct drm_file *file_priv)
1da177e4	343	{
c153f45f	344	struct drm_stats *stats = data;
b5e89ed5	345	int i;
1da177e4	346
246a3d18	347	memset(stats, 0, sizeof(*stats));
b5e89ed5	348
30e2fb18	349	mutex_lock(&dev->struct_mutex);
1da177e4 LT	350
	351	for (i = 0; i < dev->counters; i++) {
	352	if (dev->types[i] == _DRM_STAT_LOCK)
c153f45f	353	stats->data[i].value =
7c1c2871	354	(file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
b5e89ed5	355	else
c153f45f EA	356	stats->data[i].value = atomic_read(&dev->counts[i]);
c153f45f EA	357	stats->data[i].type = dev->types[i];
1da177e4	358	}
b5e89ed5	359
c153f45f	360	stats->count = dev->counters;
1da177e4	361
30e2fb18	362	mutex_unlock(&dev->struct_mutex);
1da177e4	363
1da177e4 LT	364	return 0;
	365	}
	366
	367	/**
	368	* Setversion ioctl.
	369	*
	370	* \param inode device inode.
6c340eac	371	* \param file_priv DRM file private.
1da177e4 LT	372	* \param cmd command.
	373	* \param arg user argument, pointing to a drm_lock structure.
	374	* \return zero on success or negative number on failure.
	375	*
	376	* Sets the requested interface version
	377	*/
c153f45f	378	int drm_setversion(struct drm_device dev, void data, struct drm_file *file_priv)
1da177e4	379	{
c153f45f EA	380	struct drm_set_version *sv = data;
	381	int if_version, retcode = 0;
	382
	383	if (sv->drm_di_major != -1) {
	384	if (sv->drm_di_major != DRM_IF_MAJOR \|\|
	385	sv->drm_di_minor < 0 \|\| sv->drm_di_minor > DRM_IF_MINOR) {
	386	retcode = -EINVAL;
	387	goto done;
	388	}
	389	if_version = DRM_IF_VERSION(sv->drm_di_major,
	390	sv->drm_di_minor);
3d77461e	391	dev->if_version = max(if_version, dev->if_version);
c153f45f	392	if (sv->drm_di_minor >= 1) {
1da177e4 LT	393	/*
1da177e4 LT	394	* Version 1.1 includes tying of DRM to specific device
c17c2f89	395	* Version 1.4 has proper PCI domain support
1da177e4	396	*/
3fb688fd CW	397	retcode = drm_set_busid(dev, file_priv);
	398	if (retcode)
	399	goto done;
1da177e4 LT	400	}
	401	}
	402
c153f45f EA	403	if (sv->drm_dd_major != -1) {
	404	if (sv->drm_dd_major != dev->driver->major \|\|
	405	sv->drm_dd_minor < 0 \|\| sv->drm_dd_minor >
	406	dev->driver->minor) {
	407	retcode = -EINVAL;
	408	goto done;
	409	}
1da177e4 LT	410
1da177e4 LT	411	if (dev->driver->set_version)
c153f45f	412	dev->driver->set_version(dev, sv);
1da177e4	413	}
c153f45f EA	414
	415	done:
	416	sv->drm_di_major = DRM_IF_MAJOR;
	417	sv->drm_di_minor = DRM_IF_MINOR;
	418	sv->drm_dd_major = dev->driver->major;
	419	sv->drm_dd_minor = dev->driver->minor;
	420
	421	return retcode;
1da177e4 LT	422	}
	423
	424	/** No-op ioctl. */
c153f45f EA	425	int drm_noop(struct drm_device dev, void data,
c153f45f EA	426	struct drm_file *file_priv)
1da177e4 LT	427	{
	428	DRM_DEBUG("\n");
	429	return 0;
	430	}