[linux-2.6-block.git] / drivers / char / 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 filp file pointer.
 * \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 inode *inode, struct file *filp,
		  unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_unique_t __user *argp = (void __user *)arg;
	drm_unique_t u;

	if (copy_from_user(&u, argp, sizeof(u)))
		return -EFAULT;
	if (u.unique_len >= dev->unique_len) {
		if (copy_to_user(u.unique, dev->unique, dev->unique_len))
			return -EFAULT;
	}
	u.unique_len = dev->unique_len;
	if (copy_to_user(argp, &u, sizeof(u)))
		return -EFAULT;
	return 0;
}

/**
 * Set the bus id.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \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 inode *inode, struct file *filp,
		  unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_unique_t u;
	int domain, bus, slot, func, ret;

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

	if (copy_from_user(&u, (drm_unique_t __user *) arg, sizeof(u)))
		return -EFAULT;

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

	dev->unique_len = u.unique_len;
	dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
	if (!dev->unique)
		return -ENOMEM;
	if (copy_from_user(dev->unique, u.unique, dev->unique_len))
		return -EFAULT;

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

	dev->devname =
	    drm_alloc(strlen(dev->driver->pci_driver.name) +
		      strlen(dev->unique) + 2, DRM_MEM_DRIVER);
	if (!dev->devname)
		return -ENOMEM;

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

	/* Return error if the busid submitted doesn't match the device's actual
	 * busid.
	 */
	ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
	if (ret != 3)
		return DRM_ERR(EINVAL);
	domain = bus >> 8;
	bus &= 0xff;

	if ((domain != dev->pci_domain) ||
	    (bus != dev->pci_bus) ||
	    (slot != dev->pci_slot) || (func != dev->pci_func))
		return -EINVAL;

	return 0;
}

static int drm_set_busid(drm_device_t * dev)
{
	int len;

	if (dev->unique != NULL)
		return EBUSY;

	dev->unique_len = 40;
	dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
	if (dev->unique == NULL)
		return ENOMEM;

	len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
		 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);

	if (len > dev->unique_len)
		DRM_ERROR("Unique buffer overflowed\n");

	dev->devname =
	    drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
		      2, DRM_MEM_DRIVER);
	if (dev->devname == NULL)
		return ENOMEM;

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

	return 0;
}

/**
 * Get a mapping information.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \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 inode *inode, struct file *filp,
	       unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_map_t __user *argp = (void __user *)arg;
	drm_map_t map;
	drm_map_list_t *r_list = NULL;
	struct list_head *list;
	int idx;
	int i;

	if (copy_from_user(&map, argp, sizeof(map)))
		return -EFAULT;
	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->head) {
		if (i == idx) {
			r_list = list_entry(list, drm_map_list_t, 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);

	if (copy_to_user(argp, &map, sizeof(map)))
		return -EFAULT;
	return 0;
}

/**
 * Get client information.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \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 inode *inode, struct file *filp,
		  unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_client_t __user *argp = (drm_client_t __user *)arg;
	drm_client_t client;
	drm_file_t *pt;
	int idx;
	int i;

	if (copy_from_user(&client, argp, sizeof(client)))
		return -EFAULT;
	idx = client.idx;
	mutex_lock(&dev->struct_mutex);
	for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) ;

	if (!pt) {
		mutex_unlock(&dev->struct_mutex);
		return -EINVAL;
	}
	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);

	if (copy_to_user(argp, &client, sizeof(client)))
		return -EFAULT;
	return 0;
}

/**
 * Get statistics information.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \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 inode *inode, struct file *filp,
		 unsigned int cmd, unsigned long arg)
{
	drm_file_t *priv = filp->private_data;
	drm_device_t *dev = priv->head->dev;
	drm_stats_t stats;
	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
			    = (dev->lock.hw_lock ? dev->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);

	if (copy_to_user((drm_stats_t __user *) arg, &stats, sizeof(stats)))
		return -EFAULT;
	return 0;
}

/**
 * Setversion ioctl.
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \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(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_set_version_t sv;
	drm_set_version_t retv;
	int if_version;
	drm_set_version_t __user *argp = (void __user *)data;

	if (copy_from_user(&sv, argp, sizeof(sv)))
		return -EFAULT;

	retv.drm_di_major = DRM_IF_MAJOR;
	retv.drm_di_minor = DRM_IF_MINOR;
	retv.drm_dd_major = dev->driver->major;
	retv.drm_dd_minor = dev->driver->minor;

	if (copy_to_user(argp, &retv, sizeof(sv)))
		return -EFAULT;

	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)
			return EINVAL;
		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
			 */
			drm_set_busid(dev);
		}
	}

	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)
			return EINVAL;

		if (dev->driver->set_version)
			dev->driver->set_version(dev, &sv);
	}
	return 0;
}

/** No-op ioctl. */
int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd,
	     unsigned long arg)
{
	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 LT	44	* \param inode device inode.
	45	* \param filp file pointer.
	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	*/
	52	int drm_getunique(struct inode inode, struct file filp,
b5e89ed5	53	unsigned int cmd, unsigned long arg)
1da177e4	54	{
b5e89ed5 DA	55	drm_file_t *priv = filp->private_data;
	56	drm_device_t *dev = priv->head->dev;
	57	drm_unique_t __user argp = (void __user )arg;
	58	drm_unique_t u;
1da177e4 LT	59
	60	if (copy_from_user(&u, argp, sizeof(u)))
	61	return -EFAULT;
	62	if (u.unique_len >= dev->unique_len) {
	63	if (copy_to_user(u.unique, dev->unique, dev->unique_len))
	64	return -EFAULT;
	65	}
	66	u.unique_len = dev->unique_len;
	67	if (copy_to_user(argp, &u, sizeof(u)))
	68	return -EFAULT;
	69	return 0;
	70	}
	71
	72	/**
	73	* Set the bus id.
b5e89ed5	74	*
1da177e4 LT	75	* \param inode device inode.
	76	* \param filp file pointer.
	77	* \param cmd command.
	78	* \param arg user argument, pointing to a drm_unique structure.
	79	* \return zero on success or a negative number on failure.
	80	*
	81	* Copies the bus id from userspace into drm_device::unique, and verifies that
	82	* it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
	83	* in interface version 1.1 and will return EBUSY when setversion has requested
	84	* version 1.1 or greater.
	85	*/
	86	int drm_setunique(struct inode inode, struct file filp,
b5e89ed5	87	unsigned int cmd, unsigned long arg)
1da177e4	88	{
b5e89ed5 DA	89	drm_file_t *priv = filp->private_data;
	90	drm_device_t *dev = priv->head->dev;
	91	drm_unique_t u;
	92	int domain, bus, slot, func, ret;
1da177e4	93
b5e89ed5 DA	94	if (dev->unique_len \|\| dev->unique)
b5e89ed5 DA	95	return -EBUSY;
1da177e4	96
b5e89ed5	97	if (copy_from_user(&u, (drm_unique_t __user *) arg, sizeof(u)))
1da177e4 LT	98	return -EFAULT;
1da177e4 LT	99
b5e89ed5 DA	100	if (!u.unique_len \|\| u.unique_len > 1024)
b5e89ed5 DA	101	return -EINVAL;
1da177e4 LT	102
1da177e4 LT	103	dev->unique_len = u.unique_len;
b5e89ed5 DA	104	dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
	105	if (!dev->unique)
	106	return -ENOMEM;
1da177e4 LT	107	if (copy_from_user(dev->unique, u.unique, dev->unique_len))
	108	return -EFAULT;
	109
	110	dev->unique[dev->unique_len] = '\0';
	111
b5e89ed5 DA	112	dev->devname =
	113	drm_alloc(strlen(dev->driver->pci_driver.name) +
	114	strlen(dev->unique) + 2, DRM_MEM_DRIVER);
1da177e4 LT	115	if (!dev->devname)
	116	return -ENOMEM;
	117
b5e89ed5 DA	118	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
b5e89ed5 DA	119	dev->unique);
1da177e4 LT	120
	121	/* Return error if the busid submitted doesn't match the device's actual
	122	* busid.
	123	*/
	124	ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
	125	if (ret != 3)
	126	return DRM_ERR(EINVAL);
	127	domain = bus >> 8;
	128	bus &= 0xff;
b5e89ed5	129
1da177e4 LT	130	if ((domain != dev->pci_domain) \|\|
1da177e4 LT	131	(bus != dev->pci_bus) \|\|
b5e89ed5	132	(slot != dev->pci_slot) \|\| (func != dev->pci_func))
1da177e4 LT	133	return -EINVAL;
	134
	135	return 0;
	136	}
	137
b5e89ed5	138	static int drm_set_busid(drm_device_t * dev)
1da177e4	139	{
fe34765b DA	140	int len;
fe34765b DA	141
1da177e4 LT	142	if (dev->unique != NULL)
	143	return EBUSY;
	144
fe34765b	145	dev->unique_len = 40;
1da177e4 LT	146	dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
	147	if (dev->unique == NULL)
	148	return ENOMEM;
	149
fe34765b	150	len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
b5e89ed5	151	dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
1da177e4	152
fe34765b DA	153	if (len > dev->unique_len)
	154	DRM_ERROR("Unique buffer overflowed\n");
	155
b5e89ed5 DA	156	dev->devname =
	157	drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
	158	2, DRM_MEM_DRIVER);
1da177e4 LT	159	if (dev->devname == NULL)
	160	return ENOMEM;
	161
b5e89ed5 DA	162	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
b5e89ed5 DA	163	dev->unique);
1da177e4 LT	164
	165	return 0;
	166	}
	167
1da177e4 LT	168	/**
	169	* Get a mapping information.
	170	*
	171	* \param inode device inode.
	172	* \param filp file pointer.
	173	* \param cmd command.
	174	* \param arg user argument, pointing to a drm_map structure.
b5e89ed5	175	*
1da177e4 LT	176	* \return zero on success or a negative number on failure.
	177	*
	178	* Searches for the mapping with the specified offset and copies its information
	179	* into userspace
	180	*/
b5e89ed5 DA	181	int drm_getmap(struct inode inode, struct file filp,
b5e89ed5 DA	182	unsigned int cmd, unsigned long arg)
1da177e4	183	{
b5e89ed5 DA	184	drm_file_t *priv = filp->private_data;
	185	drm_device_t *dev = priv->head->dev;
	186	drm_map_t __user argp = (void __user )arg;
	187	drm_map_t map;
1da177e4 LT	188	drm_map_list_t *r_list = NULL;
1da177e4 LT	189	struct list_head *list;
b5e89ed5 DA	190	int idx;
b5e89ed5 DA	191	int i;
1da177e4 LT	192
	193	if (copy_from_user(&map, argp, sizeof(map)))
	194	return -EFAULT;
	195	idx = map.offset;
	196
30e2fb18	197	mutex_lock(&dev->struct_mutex);
1da177e4	198	if (idx < 0) {
30e2fb18	199	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	200	return -EINVAL;
	201	}
	202
	203	i = 0;
	204	list_for_each(list, &dev->maplist->head) {
b5e89ed5	205	if (i == idx) {
1da177e4 LT	206	r_list = list_entry(list, drm_map_list_t, head);
	207	break;
	208	}
	209	i++;
	210	}
b5e89ed5	211	if (!r_list \|\| !r_list->map) {
30e2fb18	212	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	213	return -EINVAL;
	214	}
	215
	216	map.offset = r_list->map->offset;
b5e89ed5 DA	217	map.size = r_list->map->size;
	218	map.type = r_list->map->type;
	219	map.flags = r_list->map->flags;
	220	map.handle = (void *)(unsigned long)r_list->user_token;
	221	map.mtrr = r_list->map->mtrr;
30e2fb18	222	mutex_unlock(&dev->struct_mutex);
1da177e4	223
b5e89ed5 DA	224	if (copy_to_user(argp, &map, sizeof(map)))
b5e89ed5 DA	225	return -EFAULT;
1da177e4 LT	226	return 0;
	227	}
	228
	229	/**
	230	* Get client information.
	231	*
	232	* \param inode device inode.
	233	* \param filp file pointer.
	234	* \param cmd command.
	235	* \param arg user argument, pointing to a drm_client structure.
b5e89ed5	236	*
1da177e4 LT	237	* \return zero on success or a negative number on failure.
	238	*
	239	* Searches for the client with the specified index and copies its information
	240	* into userspace
	241	*/
b5e89ed5 DA	242	int drm_getclient(struct inode inode, struct file filp,
b5e89ed5 DA	243	unsigned int cmd, unsigned long arg)
1da177e4	244	{
b5e89ed5 DA	245	drm_file_t *priv = filp->private_data;
b5e89ed5 DA	246	drm_device_t *dev = priv->head->dev;
fe34765b	247	drm_client_t __user argp = (drm_client_t __user )arg;
1da177e4	248	drm_client_t client;
b5e89ed5 DA	249	drm_file_t *pt;
	250	int idx;
	251	int i;
1da177e4 LT	252
	253	if (copy_from_user(&client, argp, sizeof(client)))
	254	return -EFAULT;
	255	idx = client.idx;
30e2fb18	256	mutex_lock(&dev->struct_mutex);
b5e89ed5	257	for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) ;
1da177e4 LT	258
1da177e4 LT	259	if (!pt) {
30e2fb18	260	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	261	return -EINVAL;
1da177e4 LT	262	}
b5e89ed5 DA	263	client.auth = pt->authenticated;
	264	client.pid = pt->pid;
	265	client.uid = pt->uid;
1da177e4	266	client.magic = pt->magic;
b5e89ed5	267	client.iocs = pt->ioctl_count;
30e2fb18	268	mutex_unlock(&dev->struct_mutex);
1da177e4	269
fe34765b	270	if (copy_to_user(argp, &client, sizeof(client)))
1da177e4 LT	271	return -EFAULT;
	272	return 0;
	273	}
	274
b5e89ed5 DA	275	/**
	276	* Get statistics information.
	277	*
1da177e4 LT	278	* \param inode device inode.
	279	* \param filp file pointer.
	280	* \param cmd command.
	281	* \param arg user argument, pointing to a drm_stats structure.
b5e89ed5	282	*
1da177e4 LT	283	* \return zero on success or a negative number on failure.
1da177e4 LT	284	*/
b5e89ed5 DA	285	int drm_getstats(struct inode inode, struct file filp,
b5e89ed5 DA	286	unsigned int cmd, unsigned long arg)
1da177e4	287	{
b5e89ed5 DA	288	drm_file_t *priv = filp->private_data;
	289	drm_device_t *dev = priv->head->dev;
	290	drm_stats_t stats;
	291	int i;
1da177e4 LT	292
1da177e4 LT	293	memset(&stats, 0, sizeof(stats));
b5e89ed5	294
30e2fb18	295	mutex_lock(&dev->struct_mutex);
1da177e4 LT	296
	297	for (i = 0; i < dev->counters; i++) {
	298	if (dev->types[i] == _DRM_STAT_LOCK)
	299	stats.data[i].value
b5e89ed5 DA	300	= (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
b5e89ed5 DA	301	else
1da177e4	302	stats.data[i].value = atomic_read(&dev->counts[i]);
b5e89ed5	303	stats.data[i].type = dev->types[i];
1da177e4	304	}
b5e89ed5	305
1da177e4 LT	306	stats.count = dev->counters;
1da177e4 LT	307
30e2fb18	308	mutex_unlock(&dev->struct_mutex);
1da177e4	309
b5e89ed5	310	if (copy_to_user((drm_stats_t __user *) arg, &stats, sizeof(stats)))
1da177e4 LT	311	return -EFAULT;
	312	return 0;
	313	}
	314
	315	/**
	316	* Setversion ioctl.
	317	*
	318	* \param inode device inode.
	319	* \param filp file pointer.
	320	* \param cmd command.
	321	* \param arg user argument, pointing to a drm_lock structure.
	322	* \return zero on success or negative number on failure.
	323	*
	324	* Sets the requested interface version
	325	*/
	326	int drm_setversion(DRM_IOCTL_ARGS)
	327	{
	328	DRM_DEVICE;
	329	drm_set_version_t sv;
	330	drm_set_version_t retv;
	331	int if_version;
	332	drm_set_version_t __user argp = (void __user )data;
1da177e4	333
3d77461e DA	334	if (copy_from_user(&sv, argp, sizeof(sv)))
3d77461e DA	335	return -EFAULT;
1da177e4	336
1da177e4 LT	337	retv.drm_di_major = DRM_IF_MAJOR;
1da177e4 LT	338	retv.drm_di_minor = DRM_IF_MINOR;
22eae947 DA	339	retv.drm_dd_major = dev->driver->major;
22eae947 DA	340	retv.drm_dd_minor = dev->driver->minor;
1da177e4	341
3d77461e DA	342	if (copy_to_user(argp, &retv, sizeof(sv)))
3d77461e DA	343	return -EFAULT;
1da177e4 LT	344
	345	if (sv.drm_di_major != -1) {
	346	if (sv.drm_di_major != DRM_IF_MAJOR \|\|
	347	sv.drm_di_minor < 0 \|\| sv.drm_di_minor > DRM_IF_MINOR)
	348	return EINVAL;
fe34765b	349	if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_di_minor);
3d77461e	350	dev->if_version = max(if_version, dev->if_version);
1da177e4 LT	351	if (sv.drm_di_minor >= 1) {
	352	/*
	353	* Version 1.1 includes tying of DRM to specific device
	354	*/
	355	drm_set_busid(dev);
	356	}
	357	}
	358
	359	if (sv.drm_dd_major != -1) {
22eae947	360	if (sv.drm_dd_major != dev->driver->major \|\|
b5e89ed5	361	sv.drm_dd_minor < 0
22eae947	362	\|\| sv.drm_dd_minor > dev->driver->minor)
1da177e4 LT	363	return EINVAL;
	364
	365	if (dev->driver->set_version)
	366	dev->driver->set_version(dev, &sv);
	367	}
	368	return 0;
	369	}
	370
	371	/** No-op ioctl. */
	372	int drm_noop(struct inode inode, struct file filp, unsigned int cmd,
b5e89ed5	373	unsigned long arg)
1da177e4 LT	374	{
	375	DRM_DEBUG("\n");
	376	return 0;
	377	}