[deliverable/linux.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)
{
	struct drm_file *priv = filp->private_data;
	struct drm_device *dev = priv->head->dev;
	struct drm_unique __user *argp = (void __user *)arg;
	struct drm_unique 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)
{
	struct drm_file *priv = filp->private_data;
	struct drm_device *dev = priv->head->dev;
	struct drm_unique u;
	int domain, bus, slot, func, ret;

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

	if (copy_from_user(&u, (struct drm_unique __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 != drm_get_pci_domain(dev)) ||
	    (bus != dev->pdev->bus->number) ||
	    (slot != PCI_SLOT(dev->pdev->devfn)) ||
	    (func != PCI_FUNC(dev->pdev->devfn)))
		return -EINVAL;

	return 0;
}

static int drm_set_busid(struct drm_device * dev)
{
	int len;

	if (dev->unique != NULL)
		return 0;

	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",
		       drm_get_pci_domain(dev), dev->pdev->bus->number,
		       PCI_SLOT(dev->pdev->devfn),
		       PCI_FUNC(dev->pdev->devfn));

	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)
{
	struct drm_file *priv = filp->private_data;
	struct drm_device *dev = priv->head->dev;
	struct drm_map __user *argp = (void __user *)arg;
	struct drm_map 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) {
		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)
{
	struct drm_file *priv = filp->private_data;
	struct drm_device *dev = priv->head->dev;
	struct drm_client __user *argp = (struct drm_client __user *)arg;
	struct drm_client client;
	struct drm_file *pt;
	int idx;
	int i;

	if (copy_from_user(&client, argp, sizeof(client)))
		return -EFAULT;
	idx = client.idx;
	mutex_lock(&dev->struct_mutex);
	
	if (list_empty(&dev->filelist)) {
		mutex_unlock(&dev->struct_mutex);
		return -EINVAL;
	}

	i = 0;
	list_for_each_entry(pt, &dev->filelist, lhead) {
		if (i++ >= idx)
			break;
	}

	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)
{
	struct drm_file *priv = filp->private_data;
	struct drm_device *dev = priv->head->dev;
	struct drm_stats 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((struct drm_stats __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;
	struct drm_set_version sv;
	struct drm_set_version retv;
	int if_version;
	struct drm_set_version __user *argp = (void __user *)data;
	int ret;

	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(retv)))
		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
			 */
			ret = drm_set_busid(dev);
			if (ret)
				return ret;
		}
	}

	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	{
84b1fd10 DA	55	struct drm_file *priv = filp->private_data;
84b1fd10 DA	56	struct drm_device *dev = priv->head->dev;
c60ce623 DA	57	struct drm_unique __user argp = (void __user )arg;
c60ce623 DA	58	struct drm_unique 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	{
84b1fd10 DA	89	struct drm_file *priv = filp->private_data;
84b1fd10 DA	90	struct drm_device *dev = priv->head->dev;
c60ce623	91	struct drm_unique u;
b5e89ed5	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
c60ce623	97	if (copy_from_user(&u, (struct drm_unique __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
33229601	130	if ((domain != drm_get_pci_domain(dev)) \|\|
242ef0e1 D	131	(bus != dev->pdev->bus->number) \|\|
	132	(slot != PCI_SLOT(dev->pdev->devfn)) \|\|
	133	(func != PCI_FUNC(dev->pdev->devfn)))
1da177e4 LT	134	return -EINVAL;
	135
	136	return 0;
	137	}
	138
84b1fd10	139	static int drm_set_busid(struct drm_device * dev)
1da177e4	140	{
fe34765b DA	141	int len;
fe34765b DA	142
1da177e4	143	if (dev->unique != NULL)
1f27ce6a	144	return 0;
1da177e4	145
fe34765b	146	dev->unique_len = 40;
1da177e4 LT	147	dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
1da177e4 LT	148	if (dev->unique == NULL)
1f27ce6a	149	return -ENOMEM;
1da177e4	150
fe34765b	151	len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
33229601	152	drm_get_pci_domain(dev), dev->pdev->bus->number,
242ef0e1 D	153	PCI_SLOT(dev->pdev->devfn),
242ef0e1 D	154	PCI_FUNC(dev->pdev->devfn));
1da177e4	155
fe34765b DA	156	if (len > dev->unique_len)
	157	DRM_ERROR("Unique buffer overflowed\n");
	158
b5e89ed5 DA	159	dev->devname =
	160	drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
	161	2, DRM_MEM_DRIVER);
1da177e4	162	if (dev->devname == NULL)
1f27ce6a	163	return -ENOMEM;
1da177e4	164
b5e89ed5 DA	165	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
b5e89ed5 DA	166	dev->unique);
1da177e4 LT	167
	168	return 0;
	169	}
	170
1da177e4 LT	171	/**
	172	* Get a mapping information.
	173	*
	174	* \param inode device inode.
	175	* \param filp file pointer.
	176	* \param cmd command.
	177	* \param arg user argument, pointing to a drm_map structure.
b5e89ed5	178	*
1da177e4 LT	179	* \return zero on success or a negative number on failure.
	180	*
	181	* Searches for the mapping with the specified offset and copies its information
	182	* into userspace
	183	*/
b5e89ed5 DA	184	int drm_getmap(struct inode inode, struct file filp,
b5e89ed5 DA	185	unsigned int cmd, unsigned long arg)
1da177e4	186	{
84b1fd10 DA	187	struct drm_file *priv = filp->private_data;
84b1fd10 DA	188	struct drm_device *dev = priv->head->dev;
c60ce623 DA	189	struct drm_map __user argp = (void __user )arg;
c60ce623 DA	190	struct drm_map map;
1da177e4 LT	191	drm_map_list_t *r_list = NULL;
1da177e4 LT	192	struct list_head *list;
b5e89ed5 DA	193	int idx;
b5e89ed5 DA	194	int i;
1da177e4 LT	195
	196	if (copy_from_user(&map, argp, sizeof(map)))
	197	return -EFAULT;
	198	idx = map.offset;
	199
30e2fb18	200	mutex_lock(&dev->struct_mutex);
1da177e4	201	if (idx < 0) {
30e2fb18	202	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	203	return -EINVAL;
	204	}
	205
	206	i = 0;
bd1b331f	207	list_for_each(list, &dev->maplist) {
b5e89ed5	208	if (i == idx) {
1da177e4 LT	209	r_list = list_entry(list, drm_map_list_t, head);
	210	break;
	211	}
	212	i++;
	213	}
b5e89ed5	214	if (!r_list \|\| !r_list->map) {
30e2fb18	215	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	216	return -EINVAL;
	217	}
	218
	219	map.offset = r_list->map->offset;
b5e89ed5 DA	220	map.size = r_list->map->size;
	221	map.type = r_list->map->type;
	222	map.flags = r_list->map->flags;
	223	map.handle = (void *)(unsigned long)r_list->user_token;
	224	map.mtrr = r_list->map->mtrr;
30e2fb18	225	mutex_unlock(&dev->struct_mutex);
1da177e4	226
b5e89ed5 DA	227	if (copy_to_user(argp, &map, sizeof(map)))
b5e89ed5 DA	228	return -EFAULT;
1da177e4 LT	229	return 0;
	230	}
	231
	232	/**
	233	* Get client information.
	234	*
	235	* \param inode device inode.
	236	* \param filp file pointer.
	237	* \param cmd command.
	238	* \param arg user argument, pointing to a drm_client structure.
b5e89ed5	239	*
1da177e4 LT	240	* \return zero on success or a negative number on failure.
	241	*
	242	* Searches for the client with the specified index and copies its information
	243	* into userspace
	244	*/
b5e89ed5 DA	245	int drm_getclient(struct inode inode, struct file filp,
b5e89ed5 DA	246	unsigned int cmd, unsigned long arg)
1da177e4	247	{
84b1fd10 DA	248	struct drm_file *priv = filp->private_data;
84b1fd10 DA	249	struct drm_device *dev = priv->head->dev;
c60ce623 DA	250	struct drm_client __user argp = (struct drm_client __user )arg;
c60ce623 DA	251	struct drm_client client;
84b1fd10	252	struct drm_file *pt;
b5e89ed5 DA	253	int idx;
b5e89ed5 DA	254	int i;
1da177e4 LT	255
	256	if (copy_from_user(&client, argp, sizeof(client)))
	257	return -EFAULT;
	258	idx = client.idx;
30e2fb18	259	mutex_lock(&dev->struct_mutex);
bd1b331f DA	260
bd1b331f DA	261	if (list_empty(&dev->filelist)) {
30e2fb18	262	mutex_unlock(&dev->struct_mutex);
1da177e4 LT	263	return -EINVAL;
1da177e4 LT	264	}
bd1b331f DA	265
	266	i = 0;
	267	list_for_each_entry(pt, &dev->filelist, lhead) {
	268	if (i++ >= idx)
	269	break;
	270	}
	271
b5e89ed5 DA	272	client.auth = pt->authenticated;
	273	client.pid = pt->pid;
	274	client.uid = pt->uid;
1da177e4	275	client.magic = pt->magic;
b5e89ed5	276	client.iocs = pt->ioctl_count;
30e2fb18	277	mutex_unlock(&dev->struct_mutex);
1da177e4	278
fe34765b	279	if (copy_to_user(argp, &client, sizeof(client)))
1da177e4 LT	280	return -EFAULT;
	281	return 0;
	282	}
	283
b5e89ed5 DA	284	/**
	285	* Get statistics information.
	286	*
1da177e4 LT	287	* \param inode device inode.
	288	* \param filp file pointer.
	289	* \param cmd command.
	290	* \param arg user argument, pointing to a drm_stats structure.
b5e89ed5	291	*
1da177e4 LT	292	* \return zero on success or a negative number on failure.
1da177e4 LT	293	*/
b5e89ed5 DA	294	int drm_getstats(struct inode inode, struct file filp,
b5e89ed5 DA	295	unsigned int cmd, unsigned long arg)
1da177e4	296	{
84b1fd10 DA	297	struct drm_file *priv = filp->private_data;
84b1fd10 DA	298	struct drm_device *dev = priv->head->dev;
c60ce623	299	struct drm_stats stats;
b5e89ed5	300	int i;
1da177e4 LT	301
1da177e4 LT	302	memset(&stats, 0, sizeof(stats));
b5e89ed5	303
30e2fb18	304	mutex_lock(&dev->struct_mutex);
1da177e4 LT	305
	306	for (i = 0; i < dev->counters; i++) {
	307	if (dev->types[i] == _DRM_STAT_LOCK)
	308	stats.data[i].value
b5e89ed5 DA	309	= (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
b5e89ed5 DA	310	else
1da177e4	311	stats.data[i].value = atomic_read(&dev->counts[i]);
b5e89ed5	312	stats.data[i].type = dev->types[i];
1da177e4	313	}
b5e89ed5	314
1da177e4 LT	315	stats.count = dev->counters;
1da177e4 LT	316
30e2fb18	317	mutex_unlock(&dev->struct_mutex);
1da177e4	318
c60ce623	319	if (copy_to_user((struct drm_stats __user *) arg, &stats, sizeof(stats)))
1da177e4 LT	320	return -EFAULT;
	321	return 0;
	322	}
	323
	324	/**
	325	* Setversion ioctl.
	326	*
	327	* \param inode device inode.
	328	* \param filp file pointer.
	329	* \param cmd command.
	330	* \param arg user argument, pointing to a drm_lock structure.
	331	* \return zero on success or negative number on failure.
	332	*
	333	* Sets the requested interface version
	334	*/
	335	int drm_setversion(DRM_IOCTL_ARGS)
	336	{
	337	DRM_DEVICE;
c60ce623 DA	338	struct drm_set_version sv;
c60ce623 DA	339	struct drm_set_version retv;
1da177e4	340	int if_version;
c60ce623	341	struct drm_set_version __user argp = (void __user )data;
1f27ce6a	342	int ret;
1da177e4	343
3d77461e DA	344	if (copy_from_user(&sv, argp, sizeof(sv)))
3d77461e DA	345	return -EFAULT;
1da177e4	346
1da177e4 LT	347	retv.drm_di_major = DRM_IF_MAJOR;
1da177e4 LT	348	retv.drm_di_minor = DRM_IF_MINOR;
22eae947 DA	349	retv.drm_dd_major = dev->driver->major;
22eae947 DA	350	retv.drm_dd_minor = dev->driver->minor;
1da177e4	351
1f27ce6a	352	if (copy_to_user(argp, &retv, sizeof(retv)))
3d77461e	353	return -EFAULT;
1da177e4 LT	354
	355	if (sv.drm_di_major != -1) {
	356	if (sv.drm_di_major != DRM_IF_MAJOR \|\|
	357	sv.drm_di_minor < 0 \|\| sv.drm_di_minor > DRM_IF_MINOR)
1f27ce6a	358	return -EINVAL;
fe34765b	359	if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_di_minor);
3d77461e	360	dev->if_version = max(if_version, dev->if_version);
1da177e4 LT	361	if (sv.drm_di_minor >= 1) {
	362	/*
	363	* Version 1.1 includes tying of DRM to specific device
	364	*/
1f27ce6a DA	365	ret = drm_set_busid(dev);
	366	if (ret)
	367	return ret;
1da177e4 LT	368	}
	369	}
	370
	371	if (sv.drm_dd_major != -1) {
22eae947	372	if (sv.drm_dd_major != dev->driver->major \|\|
b5e89ed5	373	sv.drm_dd_minor < 0
22eae947	374	\|\| sv.drm_dd_minor > dev->driver->minor)
1f27ce6a	375	return -EINVAL;
1da177e4 LT	376
	377	if (dev->driver->set_version)
	378	dev->driver->set_version(dev, &sv);
	379	}
	380	return 0;
	381	}
	382
	383	/** No-op ioctl. */
	384	int drm_noop(struct inode inode, struct file filp, unsigned int cmd,
b5e89ed5	385	unsigned long arg)
1da177e4 LT	386	{
	387	DRM_DEBUG("\n");
	388	return 0;
	389	}