index : renesas/drm.git	android live master
	libdrm, cloned from git://anongit.freedesktop.org/mesa/drm	Laurent Pinchart

summaryrefslogtreecommitdiff

log msg author committer range

Age	Commit message (Expand)	Author
2005-12-02	Finish the last bits necessary to get the i915 DRM port working on FreeBSD	Eric Anholt
2005-12-02	FreeBSD PR kern/85479: Restore the enabling of debugging by default by the	Eric Anholt
2005-11-30	Bump package and DSO numbers to 2.0 to reflect 32/64 ABI change	Adam Jackson
2005-11-30	Resync from Xorg head: conditional include of xorg-config.h	Adam Jackson
2005-11-30	Resync from Xorg head (Bug #3815, GNU/kFreeBSD hack)	Adam Jackson
2005-11-29	Add TODO based on my email from a while ago	Adam Jackson
2005-11-29	Remove redundant #ifdef stanza	Adam Jackson
2005-11-29	Error checking for drmStrdup (Tilman Sauerbeck)	Adam Jackson
2005-11-29	fixup xf86drm.c for new headers	Dave Airlie
2005-11-29	Fix from Hugh Dickins for consistent mapping	Dave Airlie
2005-11-29	fixes from Egbert for 64bit	Dave Airlie
2005-11-28	Assert an MIT copyright on sis_drm.h, since one was lacking and I created	Eric Anholt
2005-11-28	remove xf86drmCompat.*, unused since about XFree86 4.2.	Adam Jackson
2005-11-28	Fix AGP support guessing: Implement the same bridge checking in the MGA	Eric Anholt
2005-11-28	fix mem leak in HashHash() (bug 5171)	Brian Paul
2005-11-16	Fixed long standing 64-bit bug in via memory manager. Bumped via date and	Thomas Hellstrom
2005-11-15	Loosen via dmablit alignment checks somewhat. Adapt stride check to maximum	Thomas Hellstrom
2005-11-15	Fix compiling and reenable build of i915 driver.	Eric Anholt
2005-11-15	Fix Savage DRI without ShadowStatus NO by allowing the shadow area to be	Eric Anholt
2005-11-11	enable i915 32/64 bit ioctls	Dave Airlie
2005-11-11	RV200 < R200	Dave Airlie
2005-11-11	i810 should be fine with i810.. no idea what this crack is ..	Dave Airlie
2005-11-11	fix up radeon whitespace	Dave Airlie
2005-11-11	Fix breakage from the move of driver ioctl externs to header files.	Eric Anholt
2005-11-11	whitespace align with kernel	Dave Airlie
2005-11-11	mixing breaks in r128 driver.. fixed in kernel	Dave Airlie
2005-11-11	copy correct Kconfig	Dave Airlie
2005-11-11	realign whitespace with kernel	Dave Airlie
2005-11-11	remove extra spaces	Dave Airlie
2005-11-11	A bunch of create_proc_dir_entry() calls creating directories had crept in	Dave Airlie
2005-11-11	convert to use __set_current_state, align some header includes	Dave Airlie
2005-11-11	whitespace align closer with kernel	Dave Airlie
2005-11-11	cleanup ioctl/max_ioctl to use header file for extern symbols	Dave Airlie
2005-11-10	Fix cpu_to_le32 same as kernel not sure it is correct for ppc	Dave Airlie
2005-11-10	cleanup / whitespace align with kernel	Dave Airlie
2005-11-08	Correct a LOR issue on FreeBSD by allocating temporary space and doing a	Eric Anholt
2005-11-08	Correct another LOR issue with resource allocation. This leaves the	Eric Anholt
2005-11-08	Initial port of savage to FreeBSD for the AGP and !ShadowStatus case. Adds	Eric Anholt
2005-11-08	Correct a LOR on FreeBSD by allocating a temporary buffer and doing a	Eric Anholt
2005-11-08	Correct a LOR related to the PCI resource allocations by simply moving the	Eric Anholt
2005-11-08	Fix FreeBSD DRM for latest MGA changes to agp support, which cleans things	Eric Anholt
2005-11-08	Catch FreeBSD up to the pcie gart changes. Required minor modification to	Eric Anholt
2005-11-08	Correct a recursion on non-recursive mutex in drm_addmap from radeon's	Eric Anholt
2005-11-07	Fix bug #4908 for now. Alternative is highlighted in this bug report as the	Alan Hourihane
2005-11-06	Re-disable the via driver while it's broken on BSD.	Eric Anholt
2005-11-03	Converts the remaining drm_agp_foo functions to be a drm_agp_foo and	Ian Romanick
2005-10-31	Bump to 1.0.5 for new via header	Adam Jackson
2005-10-23	we don't use this stuff anymore .. remove 1k buffer from driver ..	Dave Airlie
2005-10-22	via: Sync via_drm.h with 3D driver. Bump via patchlevel and date.	Thomas Hellstrom
2005-10-22	Bug #328: Silence read-from-uninitialized warnings in DRM_CAS on Alpha.	Adam Jackson

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generated by cgit v1.2.3 (git 2.25.1) at 2025-11-05 20:48:42 +0000

/**
 * \file drm_ioc32.c
 *
 * 32-bit ioctl compatibility routines for the DRM.
 *
 * \author Paul Mackerras <paulus@samba.org>
 *
 * Copyright (C) Paul Mackerras 2005.
 * 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
 * THE AUTHOR 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 <linux/compat.h>

#include "drmP.h"
#include "drm_core.h"

#define DRM_IOCTL_VERSION32		DRM_IOWR(0x00, drm_version32_t)
#define DRM_IOCTL_GET_UNIQUE32		DRM_IOWR(0x01, drm_unique32_t)
#define DRM_IOCTL_GET_MAP32		DRM_IOWR(0x04, drm_map32_t)
#define DRM_IOCTL_GET_CLIENT32		DRM_IOWR(0x05, drm_client32_t)
#define DRM_IOCTL_GET_STATS32		DRM_IOR( 0x06, drm_stats32_t)

#define DRM_IOCTL_SET_UNIQUE32		DRM_IOW( 0x10, drm_unique32_t)
#define DRM_IOCTL_ADD_MAP32		DRM_IOWR(0x15, drm_map32_t)
#define DRM_IOCTL_ADD_BUFS32		DRM_IOWR(0x16, drm_buf_desc32_t)
#define DRM_IOCTL_MARK_BUFS32		DRM_IOW( 0x17, drm_buf_desc32_t)
#define DRM_IOCTL_INFO_BUFS32		DRM_IOWR(0x18, drm_buf_info32_t)
#define DRM_IOCTL_MAP_BUFS32		DRM_IOWR(0x19, drm_buf_map32_t)
#define DRM_IOCTL_FREE_BUFS32		DRM_IOW( 0x1a, drm_buf_free32_t)

#define DRM_IOCTL_RM_MAP32		DRM_IOW( 0x1b, drm_map32_t)

#define DRM_IOCTL_SET_SAREA_CTX32	DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
#define DRM_IOCTL_GET_SAREA_CTX32	DRM_IOWR(0x1d, drm_ctx_priv_map32_t)

#define DRM_IOCTL_RES_CTX32		DRM_IOWR(0x26, drm_ctx_res32_t)
#define DRM_IOCTL_DMA32			DRM_IOWR(0x29, drm_dma32_t)

#define DRM_IOCTL_AGP_ENABLE32		DRM_IOW( 0x32, drm_agp_mode32_t)
#define DRM_IOCTL_AGP_INFO32		DRM_IOR( 0x33, drm_agp_info32_t)
#define DRM_IOCTL_AGP_ALLOC32		DRM_IOWR(0x34, drm_agp_buffer32_t)
#define DRM_IOCTL_AGP_FREE32		DRM_IOW( 0x35, drm_agp_buffer32_t)
#define DRM_IOCTL_AGP_BIND32		DRM_IOW( 0x36, drm_agp_binding32_t)
#define DRM_IOCTL_AGP_UNBIND32		DRM_IOW( 0x37, drm_agp_binding32_t)

#define DRM_IOCTL_SG_ALLOC32		DRM_IOW( 0x38, drm_scatter_gather32_t)
#define DRM_IOCTL_SG_FREE32		DRM_IOW( 0x39, drm_scatter_gather32_t)

#define DRM_IOCTL_WAIT_VBLANK32		DRM_IOWR(0x3a, drm_wait_vblank32_t)

typedef struct drm_version_32 {
	int version_major;	  /**< Major version */
	int version_minor;	  /**< Minor version */
	int version_patchlevel;	  /**< Patch level */
	u32 name_len;		  /**< Length of name buffer */
	u32 name;		  /**< Name of driver */
	u32 date_len;		  /**< Length of date buffer */
	u32 date;		  /**< User-space buffer to hold date */
	u32 desc_len;		  /**< Length of desc buffer */
	u32 desc;		  /**< User-space buffer to hold desc */
} drm_version32_t;

static int compat_drm_version(struct file *file, unsigned int cmd,
			      unsigned long arg)
{
	drm_version32_t v32;
	struct drm_version __user *version;
	int err;

	if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
		return -EFAULT;

	version = compat_alloc_user_space(sizeof(*version));
	if (!access_ok(VERIFY_WRITE, version, sizeof(*version)))
		return -EFAULT;
	if (__put_user(v32.name_len, &version->name_len)
	    || __put_user((void __user *)(unsigned long)v32.name,
			  &version->name)
	    || __put_user(v32.date_len, &version->date_len)
	    || __put_user((void __user *)(unsigned long)v32.date,
			  &version->date)
	    || __put_user(v32.desc_len, &version->desc_len)
	    || __put_user((void __user *)(unsigned long)v32.desc,
			  &version->desc))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_VERSION, (unsigned long)version);
	if (err)
		return err;

	if (__get_user(v32.version_major, &version->version_major)
	    || __get_user(v32.version_minor, &version->version_minor)
	    || __get_user(v32.version_patchlevel, &version->version_patchlevel)
	    || __get_user(v32.name_len, &version->name_len)
	    || __get_user(v32.date_len, &version->date_len)
	    || __get_user(v32.desc_len, &version->desc_len))
		return -EFAULT;

	if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
		return -EFAULT;
	return 0;
}

typedef struct drm_unique32 {
	u32 unique_len;	/**< Length of unique */
	u32 unique;	/**< Unique name for driver instantiation */
} drm_unique32_t;

static int compat_drm_getunique(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_unique32_t uq32;
	struct drm_unique __user *u;
	int err;

	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
		return -EFAULT;

	u = compat_alloc_user_space(sizeof(*u));
	if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
		return -EFAULT;
	if (__put_user(uq32.unique_len, &u->unique_len)
	    || __put_user((void __user *)(unsigned long)uq32.unique,
			  &u->unique))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
	if (err)
		return err;

	if (__get_user(uq32.unique_len, &u->unique_len))
		return -EFAULT;
	if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
		return -EFAULT;
	return 0;
}

static int compat_drm_setunique(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_unique32_t uq32;
	struct drm_unique __user *u;

	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
		return -EFAULT;

	u = compat_alloc_user_space(sizeof(*u));
	if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
		return -EFAULT;
	if (__put_user(uq32.unique_len, &u->unique_len)
	    || __put_user((void __user *)(unsigned long)uq32.unique,
			  &u->unique))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
}

typedef struct drm_map32 {
	u32 offset;		/**< Requested physical address (0 for SAREA)*/
	u32 size;		/**< Requested physical size (bytes) */
	enum drm_map_type type;	/**< Type of memory to map */
	enum drm_map_flags flags;	/**< Flags */
	u32 handle;		/**< User-space: "Handle" to pass to mmap() */
	int mtrr;		/**< MTRR slot used */
} drm_map32_t;

static int compat_drm_getmap(struct file *file, unsigned int cmd,
			     unsigned long arg)
{
	drm_map32_t __user *argp = (void __user *)arg;
	drm_map32_t m32;
	struct drm_map __user *map;
	int idx, err;
	void *handle;

	if (get_user(idx, &argp->offset))
		return -EFAULT;

	map = compat_alloc_user_space(sizeof(*map));
	if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
		return -EFAULT;
	if (__put_user(idx, &map->offset))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_GET_MAP, (unsigned long)map);
	if (err)
		return err;

	if (__get_user(m32.offset, &map->offset)
	    || __get_user(m32.size, &map->size)
	    || __get_user(m32.type, &map->type)
	    || __get_user(m32.flags, &map->flags)
	    || __get_user(handle, &map->handle)
	    || __get_user(m32.mtrr, &map->mtrr))
		return -EFAULT;

	m32.handle = (unsigned long)handle;
	if (copy_to_user(argp, &m32, sizeof(m32)))
		return -EFAULT;
	return 0;

}

static int compat_drm_addmap(struct file *file, unsigned int cmd,
			     unsigned long arg)
{
	drm_map32_t __user *argp = (void __user *)arg;
	drm_map32_t m32;
	struct drm_map __user *map;
	int err;
	void *handle;

	if (copy_from_user(&m32, argp, sizeof(m32)))
		return -EFAULT;

	map = compat_alloc_user_space(sizeof(*map));
	if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
		return -EFAULT;
	if (__put_user(m32.offset, &map->offset)
	    || __put_user(m32.size, &map->size)
	    || __put_user(m32.type, &map->type)
	    || __put_user(m32.flags, &map->flags))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_ADD_MAP, (unsigned long)map);
	if (err)
		return err;

	if (__get_user(m32.offset, &map->offset)
	    || __get_user(m32.mtrr, &map->mtrr)
	    || __get_user(handle, &map->handle))
		return -EFAULT;

	m32.handle = (unsigned long)handle;
	if (m32.handle != (unsigned long)handle && printk_ratelimit())
		printk(KERN_ERR "compat_drm_addmap truncated handle"
		       " %p for type %d offset %x\n",
		       handle, m32.type, m32.offset);

	if (copy_to_user(argp, &m32, sizeof(m32)))
		return -EFAULT;

	return 0;
}

static int compat_drm_rmmap(struct file *file, unsigned int cmd,
			    unsigned long arg)
{
	drm_map32_t __user *argp = (void __user *)arg;
	struct drm_map __user *map;
	u32 handle;

	if (get_user(handle, &argp->handle))
		return -EFAULT;

	map = compat_alloc_user_space(sizeof(*map));
	if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
		return -EFAULT;
	if (__put_user((void *)(unsigned long)handle, &map->handle))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_RM_MAP, (unsigned long)map);
}

typedef struct drm_client32 {
	int idx;	/**< Which client desired? */
	int auth;	/**< Is client authenticated? */
	u32 pid;	/**< Process ID */
	u32 uid;	/**< User ID */
	u32 magic;	/**< Magic */
	u32 iocs;	/**< Ioctl count */
} drm_client32_t;

static int compat_drm_getclient(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_client32_t c32;
	drm_client32_t __user *argp = (void __user *)arg;
	struct drm_client __user *client;
	int idx, err;

	if (get_user(idx, &argp->idx))
		return -EFAULT;

	client = compat_alloc_user_space(sizeof(*client));
	if (!access_ok(VERIFY_WRITE, client, sizeof(*client)))
		return -EFAULT;
	if (__put_user(idx, &client->idx))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_GET_CLIENT, (unsigned long)client);
	if (err)
		return err;

	if (__get_user(c32.auth, &client->auth)
	    || __get_user(c32.pid, &client->pid)
	    || __get_user(c32.uid, &client->uid)
	    || __get_user(c32.magic, &client->magic)
	    || __get_user(c32.iocs, &client->iocs))
		return -EFAULT;

	if (copy_to_user(argp, &c32, sizeof(c32)))
		return -EFAULT;
	return 0;
}

typedef struct drm_stats32 {
	u32 count;
	struct {
		u32 value;
		enum drm_stat_type type;
	} data[15];
} drm_stats32_t;

static int compat_drm_getstats(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_stats32_t s32;
	drm_stats32_t __user *argp = (void __user *)arg;
	struct drm_stats __user *stats;
	int i, err;

	stats = compat_alloc_user_space(sizeof(*stats));
	if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats)))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_GET_STATS, (unsigned long)stats);
	if (err)
		return err;

	if (__get_user(s32.count, &stats->count))
		return -EFAULT;
	for (i = 0; i < 15; ++i)
		if (__get_user(s32.data[i].value, &stats->data[i].value)
		    || __get_user(s32.data[i].type, &stats->data[i].type))
			return -EFAULT;

	if (copy_to_user(argp, &s32, sizeof(s32)))
		return -EFAULT;
	return 0;
}

typedef struct drm_buf_desc32 {
	int count;		 /**< Number of buffers of this size */
	int size;		 /**< Size in bytes */
	int low_mark;		 /**< Low water mark */
	int high_mark;		 /**< High water mark */
	int flags;
	u32 agp_start;		 /**< Start address in the AGP aperture */
} drm_buf_desc32_t;

static int compat_drm_addbufs(struct file *file, unsigned int cmd,
			      unsigned long arg)
{
	drm_buf_desc32_t __user *argp = (void __user *)arg;
	struct drm_buf_desc __user *buf;
	int err;
	unsigned long agp_start;

	buf = compat_alloc_user_space(sizeof(*buf));
	if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf))
	    || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
		return -EFAULT;

	if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
	    || __get_user(agp_start, &argp->agp_start)
	    || __put_user(agp_start, &buf->agp_start))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
	if (err)
		return err;

	if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
	    || __get_user(agp_start, &buf->agp_start)
	    || __put_user(agp_start, &argp->agp_start))
		return -EFAULT;

	return 0;
}

static int compat_drm_markbufs(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_buf_desc32_t b32;
	drm_buf_desc32_t __user *argp = (void __user *)arg;
	struct drm_buf_desc __user *buf;

	if (copy_from_user(&b32, argp, sizeof(b32)))
		return -EFAULT;

	buf = compat_alloc_user_space(sizeof(*buf));
	if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf)))
		return -EFAULT;

	if (__put_user(b32.size, &buf->size)
	    || __put_user(b32.low_mark, &buf->low_mark)
	    || __put_user(b32.high_mark, &buf->high_mark))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
}

typedef struct drm_buf_info32 {
	int count;		/**< Entries in list */
	u32 list;
} drm_buf_info32_t;

static int compat_drm_infobufs(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_buf_info32_t req32;
	drm_buf_info32_t __user *argp = (void __user *)arg;
	drm_buf_desc32_t __user *to;
	struct drm_buf_info __user *request;
	struct drm_buf_desc __user *list;
	size_t nbytes;
	int i, err;
	int count, actual;

	if (copy_from_user(&req32, argp, sizeof(req32)))
		return -EFAULT;

	count = req32.count;
	to = (drm_buf_desc32_t __user *)(unsigned long)req32.list;
	if (count < 0)
		count = 0;
	if (count > 0
	    && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
		return -EFAULT;

	nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
	request = compat_alloc_user_space(nbytes);
	if (!access_ok(VERIFY_WRITE, request, nbytes))
		return -EFAULT;
	list = (struct drm_buf_desc *) (request + 1);

	if (__put_user(count, &request->count)
	    || __put_user(list, &request->list))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_INFO_BUFS, (unsigned long)request);
	if (err)
		return err;

	if (__get_user(actual, &request->count))
		return -EFAULT;
	if (count >= actual)
		for (i = 0; i < actual; ++i)
			if (__copy_in_user(&to[i], &list[i],
					   offsetof(struct drm_buf_desc, flags)))
				return -EFAULT;

	if (__put_user(actual, &argp->count))
		return -EFAULT;

	return 0;
}

typedef struct drm_buf_pub32 {
	int idx;		/**< Index into the master buffer list */
	int total;		/**< Buffer size */
	int used;		/**< Amount of buffer in use (for DMA) */
	u32 address;		/**< Address of buffer */
} drm_buf_pub32_t;

typedef struct drm_buf_map32 {
	int count;		/**< Length of the buffer list */
	u32 virtual;		/**< Mmap'd area in user-virtual */
	u32 list;		/**< Buffer information */
} drm_buf_map32_t;

static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
			      unsigned long arg)
{
	drm_buf_map32_t __user *argp = (void __user *)arg;
	drm_buf_map32_t req32;
	drm_buf_pub32_t __user *list32;
	struct drm_buf_map __user *request;
	struct drm_buf_pub __user *list;
	int i, err;
	int count, actual;
	size_t nbytes;
	void __user *addr;

	if (copy_from_user(&req32, argp, sizeof(req32)))
		return -EFAULT;
	count = req32.count;
	list32 = (void __user *)(unsigned long)req32.list;

	if (count < 0)
		return -EINVAL;
	nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
	request = compat_alloc_user_space(nbytes);
	if (!access_ok(VERIFY_WRITE, request, nbytes))
		return -EFAULT;
	list = (struct drm_buf_pub *) (request + 1);

	if (__put_user(count, &request->count)
	    || __put_user(list, &request->list))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_MAP_BUFS, (unsigned long)request);
	if (err)
		return err;

	if (__get_user(actual, &request->count))
		return -EFAULT;
	if (count >= actual)
		for (i = 0; i < actual; ++i)
			if (__copy_in_user(&list32[i], &list[i],
					   offsetof(struct drm_buf_pub, address))
			    || __get_user(addr, &list[i].address)
			    || __put_user((unsigned long)addr,
					  &list32[i].address))
				return -EFAULT;

	if (__put_user(actual, &argp->count)
	    || __get_user(addr, &request->virtual)
	    || __put_user((unsigned long)addr, &argp->virtual))
		return -EFAULT;

	return 0;
}

typedef struct drm_buf_free32 {
	int count;
	u32 list;
} drm_buf_free32_t;

static int compat_drm_freebufs(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_buf_free32_t req32;
	struct drm_buf_free __user *request;
	drm_buf_free32_t __user *argp = (void __user *)arg;

	if (copy_from_user(&req32, argp, sizeof(req32)))
		return -EFAULT;