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v4.6
   1/**
   2 * \file drm_ioc32.c
   3 *
   4 * 32-bit ioctl compatibility routines for the DRM.
   5 *
   6 * \author Paul Mackerras <paulus@samba.org>
   7 *
   8 * Copyright (C) Paul Mackerras 2005.
   9 * All Rights Reserved.
  10 *
  11 * Permission is hereby granted, free of charge, to any person obtaining a
  12 * copy of this software and associated documentation files (the "Software"),
  13 * to deal in the Software without restriction, including without limitation
  14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15 * and/or sell copies of the Software, and to permit persons to whom the
  16 * Software is furnished to do so, subject to the following conditions:
  17 *
  18 * The above copyright notice and this permission notice (including the next
  19 * paragraph) shall be included in all copies or substantial portions of the
  20 * Software.
  21 *
  22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  28 * IN THE SOFTWARE.
  29 */
  30#include <linux/compat.h>
  31#include <linux/ratelimit.h>
  32#include <linux/export.h>
  33
  34#include <drm/drmP.h>
  35#include <drm/drm_core.h>
  36
  37#define DRM_IOCTL_VERSION32		DRM_IOWR(0x00, drm_version32_t)
  38#define DRM_IOCTL_GET_UNIQUE32		DRM_IOWR(0x01, drm_unique32_t)
  39#define DRM_IOCTL_GET_MAP32		DRM_IOWR(0x04, drm_map32_t)
  40#define DRM_IOCTL_GET_CLIENT32		DRM_IOWR(0x05, drm_client32_t)
  41#define DRM_IOCTL_GET_STATS32		DRM_IOR( 0x06, drm_stats32_t)
  42
  43#define DRM_IOCTL_SET_UNIQUE32		DRM_IOW( 0x10, drm_unique32_t)
  44#define DRM_IOCTL_ADD_MAP32		DRM_IOWR(0x15, drm_map32_t)
  45#define DRM_IOCTL_ADD_BUFS32		DRM_IOWR(0x16, drm_buf_desc32_t)
  46#define DRM_IOCTL_MARK_BUFS32		DRM_IOW( 0x17, drm_buf_desc32_t)
  47#define DRM_IOCTL_INFO_BUFS32		DRM_IOWR(0x18, drm_buf_info32_t)
  48#define DRM_IOCTL_MAP_BUFS32		DRM_IOWR(0x19, drm_buf_map32_t)
  49#define DRM_IOCTL_FREE_BUFS32		DRM_IOW( 0x1a, drm_buf_free32_t)
  50
  51#define DRM_IOCTL_RM_MAP32		DRM_IOW( 0x1b, drm_map32_t)
  52
  53#define DRM_IOCTL_SET_SAREA_CTX32	DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
  54#define DRM_IOCTL_GET_SAREA_CTX32	DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
  55
  56#define DRM_IOCTL_RES_CTX32		DRM_IOWR(0x26, drm_ctx_res32_t)
  57#define DRM_IOCTL_DMA32			DRM_IOWR(0x29, drm_dma32_t)
  58
  59#define DRM_IOCTL_AGP_ENABLE32		DRM_IOW( 0x32, drm_agp_mode32_t)
  60#define DRM_IOCTL_AGP_INFO32		DRM_IOR( 0x33, drm_agp_info32_t)
  61#define DRM_IOCTL_AGP_ALLOC32		DRM_IOWR(0x34, drm_agp_buffer32_t)
  62#define DRM_IOCTL_AGP_FREE32		DRM_IOW( 0x35, drm_agp_buffer32_t)
  63#define DRM_IOCTL_AGP_BIND32		DRM_IOW( 0x36, drm_agp_binding32_t)
  64#define DRM_IOCTL_AGP_UNBIND32		DRM_IOW( 0x37, drm_agp_binding32_t)
  65
  66#define DRM_IOCTL_SG_ALLOC32		DRM_IOW( 0x38, drm_scatter_gather32_t)
  67#define DRM_IOCTL_SG_FREE32		DRM_IOW( 0x39, drm_scatter_gather32_t)
  68
  69#define DRM_IOCTL_UPDATE_DRAW32		DRM_IOW( 0x3f, drm_update_draw32_t)
  70
  71#define DRM_IOCTL_WAIT_VBLANK32		DRM_IOWR(0x3a, drm_wait_vblank32_t)
  72
  73#define DRM_IOCTL_MODE_ADDFB232		DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
  74
  75typedef struct drm_version_32 {
  76	int version_major;	  /**< Major version */
  77	int version_minor;	  /**< Minor version */
  78	int version_patchlevel;	   /**< Patch level */
  79	u32 name_len;		  /**< Length of name buffer */
  80	u32 name;		  /**< Name of driver */
  81	u32 date_len;		  /**< Length of date buffer */
  82	u32 date;		  /**< User-space buffer to hold date */
  83	u32 desc_len;		  /**< Length of desc buffer */
  84	u32 desc;		  /**< User-space buffer to hold desc */
  85} drm_version32_t;
  86
  87static int compat_drm_version(struct file *file, unsigned int cmd,
  88			      unsigned long arg)
  89{
  90	drm_version32_t v32;
  91	struct drm_version __user *version;
  92	int err;
  93
  94	if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
  95		return -EFAULT;
  96
  97	version = compat_alloc_user_space(sizeof(*version));
  98	if (!version)
  99		return -EFAULT;
 100	if (__put_user(v32.name_len, &version->name_len)
 101	    || __put_user((void __user *)(unsigned long)v32.name,
 102			  &version->name)
 103	    || __put_user(v32.date_len, &version->date_len)
 104	    || __put_user((void __user *)(unsigned long)v32.date,
 105			  &version->date)
 106	    || __put_user(v32.desc_len, &version->desc_len)
 107	    || __put_user((void __user *)(unsigned long)v32.desc,
 108			  &version->desc))
 109		return -EFAULT;
 110
 111	err = drm_ioctl(file,
 112			DRM_IOCTL_VERSION, (unsigned long)version);
 113	if (err)
 114		return err;
 115
 116	if (__get_user(v32.version_major, &version->version_major)
 117	    || __get_user(v32.version_minor, &version->version_minor)
 118	    || __get_user(v32.version_patchlevel, &version->version_patchlevel)
 119	    || __get_user(v32.name_len, &version->name_len)
 120	    || __get_user(v32.date_len, &version->date_len)
 121	    || __get_user(v32.desc_len, &version->desc_len))
 122		return -EFAULT;
 123
 124	if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
 125		return -EFAULT;
 126	return 0;
 127}
 128
 129typedef struct drm_unique32 {
 130	u32 unique_len;	/**< Length of unique */
 131	u32 unique;	/**< Unique name for driver instantiation */
 132} drm_unique32_t;
 133
 134static int compat_drm_getunique(struct file *file, unsigned int cmd,
 135				unsigned long arg)
 136{
 137	drm_unique32_t uq32;
 138	struct drm_unique __user *u;
 139	int err;
 140
 141	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 142		return -EFAULT;
 143
 144	u = compat_alloc_user_space(sizeof(*u));
 145	if (!u)
 146		return -EFAULT;
 147	if (__put_user(uq32.unique_len, &u->unique_len)
 148	    || __put_user((void __user *)(unsigned long)uq32.unique,
 149			  &u->unique))
 150		return -EFAULT;
 151
 152	err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
 153	if (err)
 154		return err;
 155
 156	if (__get_user(uq32.unique_len, &u->unique_len))
 157		return -EFAULT;
 158	if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
 159		return -EFAULT;
 160	return 0;
 161}
 162
 163static int compat_drm_setunique(struct file *file, unsigned int cmd,
 164				unsigned long arg)
 165{
 166	drm_unique32_t uq32;
 167	struct drm_unique __user *u;
 168
 169	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 170		return -EFAULT;
 171
 172	u = compat_alloc_user_space(sizeof(*u));
 173	if (!u)
 174		return -EFAULT;
 175	if (__put_user(uq32.unique_len, &u->unique_len)
 176	    || __put_user((void __user *)(unsigned long)uq32.unique,
 177			  &u->unique))
 178		return -EFAULT;
 179
 180	return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
 181}
 182
 183typedef struct drm_map32 {
 184	u32 offset;		/**< Requested physical address (0 for SAREA)*/
 185	u32 size;		/**< Requested physical size (bytes) */
 186	enum drm_map_type type;	/**< Type of memory to map */
 187	enum drm_map_flags flags;	/**< Flags */
 188	u32 handle;		/**< User-space: "Handle" to pass to mmap() */
 189	int mtrr;		/**< MTRR slot used */
 190} drm_map32_t;
 191
 192static int compat_drm_getmap(struct file *file, unsigned int cmd,
 193			     unsigned long arg)
 194{
 195	drm_map32_t __user *argp = (void __user *)arg;
 196	drm_map32_t m32;
 197	struct drm_map __user *map;
 198	int idx, err;
 199	void *handle;
 200
 201	if (get_user(idx, &argp->offset))
 202		return -EFAULT;
 203
 204	map = compat_alloc_user_space(sizeof(*map));
 205	if (!map)
 206		return -EFAULT;
 207	if (__put_user(idx, &map->offset))
 208		return -EFAULT;
 209
 210	err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
 211	if (err)
 212		return err;
 213
 214	if (__get_user(m32.offset, &map->offset)
 215	    || __get_user(m32.size, &map->size)
 216	    || __get_user(m32.type, &map->type)
 217	    || __get_user(m32.flags, &map->flags)
 218	    || __get_user(handle, &map->handle)
 219	    || __get_user(m32.mtrr, &map->mtrr))
 220		return -EFAULT;
 221
 222	m32.handle = (unsigned long)handle;
 223	if (copy_to_user(argp, &m32, sizeof(m32)))
 224		return -EFAULT;
 225	return 0;
 226
 227}
 228
 229static int compat_drm_addmap(struct file *file, unsigned int cmd,
 230			     unsigned long arg)
 231{
 232	drm_map32_t __user *argp = (void __user *)arg;
 233	drm_map32_t m32;
 234	struct drm_map __user *map;
 235	int err;
 236	void *handle;
 237
 238	if (copy_from_user(&m32, argp, sizeof(m32)))
 239		return -EFAULT;
 240
 241	map = compat_alloc_user_space(sizeof(*map));
 242	if (!map)
 243		return -EFAULT;
 244	if (__put_user(m32.offset, &map->offset)
 245	    || __put_user(m32.size, &map->size)
 246	    || __put_user(m32.type, &map->type)
 247	    || __put_user(m32.flags, &map->flags))
 248		return -EFAULT;
 249
 250	err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map);
 251	if (err)
 252		return err;
 253
 254	if (__get_user(m32.offset, &map->offset)
 255	    || __get_user(m32.mtrr, &map->mtrr)
 256	    || __get_user(handle, &map->handle))
 257		return -EFAULT;
 258
 259	m32.handle = (unsigned long)handle;
 260	if (m32.handle != (unsigned long)handle)
 261		printk_ratelimited(KERN_ERR "compat_drm_addmap truncated handle"
 262				   " %p for type %d offset %x\n",
 263				   handle, m32.type, m32.offset);
 264
 265	if (copy_to_user(argp, &m32, sizeof(m32)))
 266		return -EFAULT;
 267
 268	return 0;
 269}
 270
 271static int compat_drm_rmmap(struct file *file, unsigned int cmd,
 272			    unsigned long arg)
 273{
 274	drm_map32_t __user *argp = (void __user *)arg;
 275	struct drm_map __user *map;
 276	u32 handle;
 277
 278	if (get_user(handle, &argp->handle))
 279		return -EFAULT;
 280
 281	map = compat_alloc_user_space(sizeof(*map));
 282	if (!map)
 283		return -EFAULT;
 284	if (__put_user((void *)(unsigned long)handle, &map->handle))
 285		return -EFAULT;
 286
 287	return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
 288}
 289
 290typedef struct drm_client32 {
 291	int idx;	/**< Which client desired? */
 292	int auth;	/**< Is client authenticated? */
 293	u32 pid;	/**< Process ID */
 294	u32 uid;	/**< User ID */
 295	u32 magic;	/**< Magic */
 296	u32 iocs;	/**< Ioctl count */
 297} drm_client32_t;
 298
 299static int compat_drm_getclient(struct file *file, unsigned int cmd,
 300				unsigned long arg)
 301{
 302	drm_client32_t c32;
 303	drm_client32_t __user *argp = (void __user *)arg;
 304	struct drm_client __user *client;
 305	int idx, err;
 306
 307	if (get_user(idx, &argp->idx))
 308		return -EFAULT;
 309
 310	client = compat_alloc_user_space(sizeof(*client));
 311	if (!client)
 312		return -EFAULT;
 313	if (__put_user(idx, &client->idx))
 314		return -EFAULT;
 315
 316	err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
 317	if (err)
 318		return err;
 319
 320	if (__get_user(c32.idx, &client->idx)
 321	    || __get_user(c32.auth, &client->auth)
 322	    || __get_user(c32.pid, &client->pid)
 323	    || __get_user(c32.uid, &client->uid)
 324	    || __get_user(c32.magic, &client->magic)
 325	    || __get_user(c32.iocs, &client->iocs))
 326		return -EFAULT;
 327
 328	if (copy_to_user(argp, &c32, sizeof(c32)))
 329		return -EFAULT;
 330	return 0;
 331}
 332
 333typedef struct drm_stats32 {
 334	u32 count;
 335	struct {
 336		u32 value;
 337		enum drm_stat_type type;
 338	} data[15];
 339} drm_stats32_t;
 340
 341static int compat_drm_getstats(struct file *file, unsigned int cmd,
 342			       unsigned long arg)
 343{
 344	drm_stats32_t s32;
 345	drm_stats32_t __user *argp = (void __user *)arg;
 346	struct drm_stats __user *stats;
 347	int i, err;
 348
 349	stats = compat_alloc_user_space(sizeof(*stats));
 350	if (!stats)
 351		return -EFAULT;
 352
 353	err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
 354	if (err)
 355		return err;
 356
 357	if (__get_user(s32.count, &stats->count))
 358		return -EFAULT;
 359	for (i = 0; i < 15; ++i)
 360		if (__get_user(s32.data[i].value, &stats->data[i].value)
 361		    || __get_user(s32.data[i].type, &stats->data[i].type))
 362			return -EFAULT;
 363
 364	if (copy_to_user(argp, &s32, sizeof(s32)))
 365		return -EFAULT;
 366	return 0;
 367}
 368
 369typedef struct drm_buf_desc32 {
 370	int count;		 /**< Number of buffers of this size */
 371	int size;		 /**< Size in bytes */
 372	int low_mark;		 /**< Low water mark */
 373	int high_mark;		 /**< High water mark */
 374	int flags;
 375	u32 agp_start;		 /**< Start address in the AGP aperture */
 376} drm_buf_desc32_t;
 377
 378static int compat_drm_addbufs(struct file *file, unsigned int cmd,
 379			      unsigned long arg)
 380{
 381	drm_buf_desc32_t __user *argp = (void __user *)arg;
 382	struct drm_buf_desc __user *buf;
 383	int err;
 384	unsigned long agp_start;
 385
 386	buf = compat_alloc_user_space(sizeof(*buf));
 387	if (!buf || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
 
 388		return -EFAULT;
 389
 390	if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
 391	    || __get_user(agp_start, &argp->agp_start)
 392	    || __put_user(agp_start, &buf->agp_start))
 393		return -EFAULT;
 394
 395	err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
 396	if (err)
 397		return err;
 398
 399	if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
 400	    || __get_user(agp_start, &buf->agp_start)
 401	    || __put_user(agp_start, &argp->agp_start))
 402		return -EFAULT;
 403
 404	return 0;
 405}
 406
 407static int compat_drm_markbufs(struct file *file, unsigned int cmd,
 408			       unsigned long arg)
 409{
 410	drm_buf_desc32_t b32;
 411	drm_buf_desc32_t __user *argp = (void __user *)arg;
 412	struct drm_buf_desc __user *buf;
 413
 414	if (copy_from_user(&b32, argp, sizeof(b32)))
 415		return -EFAULT;
 416
 417	buf = compat_alloc_user_space(sizeof(*buf));
 418	if (!buf)
 419		return -EFAULT;
 420
 421	if (__put_user(b32.size, &buf->size)
 422	    || __put_user(b32.low_mark, &buf->low_mark)
 423	    || __put_user(b32.high_mark, &buf->high_mark))
 424		return -EFAULT;
 425
 426	return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
 427}
 428
 429typedef struct drm_buf_info32 {
 430	int count;		/**< Entries in list */
 431	u32 list;
 432} drm_buf_info32_t;
 433
 434static int compat_drm_infobufs(struct file *file, unsigned int cmd,
 435			       unsigned long arg)
 436{
 437	drm_buf_info32_t req32;
 438	drm_buf_info32_t __user *argp = (void __user *)arg;
 439	drm_buf_desc32_t __user *to;
 440	struct drm_buf_info __user *request;
 441	struct drm_buf_desc __user *list;
 442	size_t nbytes;
 443	int i, err;
 444	int count, actual;
 445
 446	if (copy_from_user(&req32, argp, sizeof(req32)))
 447		return -EFAULT;
 448
 449	count = req32.count;
 450	to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
 451	if (count < 0)
 452		count = 0;
 453	if (count > 0
 454	    && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
 455		return -EFAULT;
 456
 457	nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
 458	request = compat_alloc_user_space(nbytes);
 459	if (!request)
 460		return -EFAULT;
 461	list = (struct drm_buf_desc *) (request + 1);
 462
 463	if (__put_user(count, &request->count)
 464	    || __put_user(list, &request->list))
 465		return -EFAULT;
 466
 467	err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
 468	if (err)
 469		return err;
 470
 471	if (__get_user(actual, &request->count))
 472		return -EFAULT;
 473	if (count >= actual)
 474		for (i = 0; i < actual; ++i)
 475			if (__copy_in_user(&to[i], &list[i],
 476					   offsetof(struct drm_buf_desc, flags)))
 477				return -EFAULT;
 478
 479	if (__put_user(actual, &argp->count))
 480		return -EFAULT;
 481
 482	return 0;
 483}
 484
 485typedef struct drm_buf_pub32 {
 486	int idx;		/**< Index into the master buffer list */
 487	int total;		/**< Buffer size */
 488	int used;		/**< Amount of buffer in use (for DMA) */
 489	u32 address;		/**< Address of buffer */
 490} drm_buf_pub32_t;
 491
 492typedef struct drm_buf_map32 {
 493	int count;		/**< Length of the buffer list */
 494	u32 virtual;		/**< Mmap'd area in user-virtual */
 495	u32 list;		/**< Buffer information */
 496} drm_buf_map32_t;
 497
 498static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
 499			      unsigned long arg)
 500{
 501	drm_buf_map32_t __user *argp = (void __user *)arg;
 502	drm_buf_map32_t req32;
 503	drm_buf_pub32_t __user *list32;
 504	struct drm_buf_map __user *request;
 505	struct drm_buf_pub __user *list;
 506	int i, err;
 507	int count, actual;
 508	size_t nbytes;
 509	void __user *addr;
 510
 511	if (copy_from_user(&req32, argp, sizeof(req32)))
 512		return -EFAULT;
 513	count = req32.count;
 514	list32 = (void __user *)(unsigned long)req32.list;
 515
 516	if (count < 0)
 517		return -EINVAL;
 518	nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
 519	request = compat_alloc_user_space(nbytes);
 520	if (!request)
 521		return -EFAULT;
 522	list = (struct drm_buf_pub *) (request + 1);
 523
 524	if (__put_user(count, &request->count)
 525	    || __put_user(list, &request->list))
 526		return -EFAULT;
 527
 528	err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
 529	if (err)
 530		return err;
 531
 532	if (__get_user(actual, &request->count))
 533		return -EFAULT;
 534	if (count >= actual)
 535		for (i = 0; i < actual; ++i)
 536			if (__copy_in_user(&list32[i], &list[i],
 537					   offsetof(struct drm_buf_pub, address))
 538			    || __get_user(addr, &list[i].address)
 539			    || __put_user((unsigned long)addr,
 540					  &list32[i].address))
 541				return -EFAULT;
 542
 543	if (__put_user(actual, &argp->count)
 544	    || __get_user(addr, &request->virtual)
 545	    || __put_user((unsigned long)addr, &argp->virtual))
 546		return -EFAULT;
 547
 548	return 0;
 549}
 550
 551typedef struct drm_buf_free32 {
 552	int count;
 553	u32 list;
 554} drm_buf_free32_t;
 555
 556static int compat_drm_freebufs(struct file *file, unsigned int cmd,
 557			       unsigned long arg)
 558{
 559	drm_buf_free32_t req32;
 560	struct drm_buf_free __user *request;
 561	drm_buf_free32_t __user *argp = (void __user *)arg;
 562
 563	if (copy_from_user(&req32, argp, sizeof(req32)))
 564		return -EFAULT;
 565
 566	request = compat_alloc_user_space(sizeof(*request));
 567	if (!request)
 568		return -EFAULT;
 569	if (__put_user(req32.count, &request->count)
 570	    || __put_user((int __user *)(unsigned long)req32.list,
 571			  &request->list))
 572		return -EFAULT;
 573
 574	return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
 575}
 576
 577typedef struct drm_ctx_priv_map32 {
 578	unsigned int ctx_id;	 /**< Context requesting private mapping */
 579	u32 handle;		/**< Handle of map */
 580} drm_ctx_priv_map32_t;
 581
 582static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
 583				  unsigned long arg)
 584{
 585	drm_ctx_priv_map32_t req32;
 586	struct drm_ctx_priv_map __user *request;
 587	drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 588
 589	if (copy_from_user(&req32, argp, sizeof(req32)))
 590		return -EFAULT;
 591
 592	request = compat_alloc_user_space(sizeof(*request));
 593	if (!request)
 594		return -EFAULT;
 595	if (__put_user(req32.ctx_id, &request->ctx_id)
 596	    || __put_user((void *)(unsigned long)req32.handle,
 597			  &request->handle))
 598		return -EFAULT;
 599
 600	return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
 601}
 602
 603static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
 604				  unsigned long arg)
 605{
 606	struct drm_ctx_priv_map __user *request;
 607	drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 608	int err;
 609	unsigned int ctx_id;
 610	void *handle;
 611
 612	if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 613	    || __get_user(ctx_id, &argp->ctx_id))
 614		return -EFAULT;
 615
 616	request = compat_alloc_user_space(sizeof(*request));
 617	if (!request)
 618		return -EFAULT;
 619	if (__put_user(ctx_id, &request->ctx_id))
 620		return -EFAULT;
 621
 622	err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
 623	if (err)
 624		return err;
 625
 626	if (__get_user(handle, &request->handle)
 627	    || __put_user((unsigned long)handle, &argp->handle))
 628		return -EFAULT;
 629
 630	return 0;
 631}
 632
 633typedef struct drm_ctx_res32 {
 634	int count;
 635	u32 contexts;
 636} drm_ctx_res32_t;
 637
 638static int compat_drm_resctx(struct file *file, unsigned int cmd,
 639			     unsigned long arg)
 640{
 641	drm_ctx_res32_t __user *argp = (void __user *)arg;
 642	drm_ctx_res32_t res32;
 643	struct drm_ctx_res __user *res;
 644	int err;
 645
 646	if (copy_from_user(&res32, argp, sizeof(res32)))
 647		return -EFAULT;
 648
 649	res = compat_alloc_user_space(sizeof(*res));
 650	if (!res)
 651		return -EFAULT;
 652	if (__put_user(res32.count, &res->count)
 653	    || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
 654			  &res->contexts))
 655		return -EFAULT;
 656
 657	err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
 658	if (err)
 659		return err;
 660
 661	if (__get_user(res32.count, &res->count)
 662	    || __put_user(res32.count, &argp->count))
 663		return -EFAULT;
 664
 665	return 0;
 666}
 667
 668typedef struct drm_dma32 {
 669	int context;		  /**< Context handle */
 670	int send_count;		  /**< Number of buffers to send */
 671	u32 send_indices;	  /**< List of handles to buffers */
 672	u32 send_sizes;		  /**< Lengths of data to send */
 673	enum drm_dma_flags flags;		  /**< Flags */
 674	int request_count;	  /**< Number of buffers requested */
 675	int request_size;	  /**< Desired size for buffers */
 676	u32 request_indices;	  /**< Buffer information */
 677	u32 request_sizes;
 678	int granted_count;	  /**< Number of buffers granted */
 679} drm_dma32_t;
 680
 681static int compat_drm_dma(struct file *file, unsigned int cmd,
 682			  unsigned long arg)
 683{
 684	drm_dma32_t d32;
 685	drm_dma32_t __user *argp = (void __user *)arg;
 686	struct drm_dma __user *d;
 687	int err;
 688
 689	if (copy_from_user(&d32, argp, sizeof(d32)))
 690		return -EFAULT;
 691
 692	d = compat_alloc_user_space(sizeof(*d));
 693	if (!d)
 694		return -EFAULT;
 695
 696	if (__put_user(d32.context, &d->context)
 697	    || __put_user(d32.send_count, &d->send_count)
 698	    || __put_user((int __user *)(unsigned long)d32.send_indices,
 699			  &d->send_indices)
 700	    || __put_user((int __user *)(unsigned long)d32.send_sizes,
 701			  &d->send_sizes)
 702	    || __put_user(d32.flags, &d->flags)
 703	    || __put_user(d32.request_count, &d->request_count)
 704	    || __put_user((int __user *)(unsigned long)d32.request_indices,
 705			  &d->request_indices)
 706	    || __put_user((int __user *)(unsigned long)d32.request_sizes,
 707			  &d->request_sizes))
 708		return -EFAULT;
 709
 710	err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
 711	if (err)
 712		return err;
 713
 714	if (__get_user(d32.request_size, &d->request_size)
 715	    || __get_user(d32.granted_count, &d->granted_count)
 716	    || __put_user(d32.request_size, &argp->request_size)
 717	    || __put_user(d32.granted_count, &argp->granted_count))
 718		return -EFAULT;
 719
 720	return 0;
 721}
 722
 723#if IS_ENABLED(CONFIG_AGP)
 724typedef struct drm_agp_mode32 {
 725	u32 mode;	/**< AGP mode */
 726} drm_agp_mode32_t;
 727
 728static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
 729				 unsigned long arg)
 730{
 731	drm_agp_mode32_t __user *argp = (void __user *)arg;
 732	drm_agp_mode32_t m32;
 733	struct drm_agp_mode __user *mode;
 734
 735	if (get_user(m32.mode, &argp->mode))
 736		return -EFAULT;
 737
 738	mode = compat_alloc_user_space(sizeof(*mode));
 739	if (put_user(m32.mode, &mode->mode))
 740		return -EFAULT;
 741
 742	return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
 743}
 744
 745typedef struct drm_agp_info32 {
 746	int agp_version_major;
 747	int agp_version_minor;
 748	u32 mode;
 749	u32 aperture_base;	/* physical address */
 750	u32 aperture_size;	/* bytes */
 751	u32 memory_allowed;	/* bytes */
 752	u32 memory_used;
 753
 754	/* PCI information */
 755	unsigned short id_vendor;
 756	unsigned short id_device;
 757} drm_agp_info32_t;
 758
 759static int compat_drm_agp_info(struct file *file, unsigned int cmd,
 760			       unsigned long arg)
 761{
 762	drm_agp_info32_t __user *argp = (void __user *)arg;
 763	drm_agp_info32_t i32;
 764	struct drm_agp_info __user *info;
 765	int err;
 766
 767	info = compat_alloc_user_space(sizeof(*info));
 768	if (!info)
 769		return -EFAULT;
 770
 771	err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
 772	if (err)
 773		return err;
 774
 775	if (__get_user(i32.agp_version_major, &info->agp_version_major)
 776	    || __get_user(i32.agp_version_minor, &info->agp_version_minor)
 777	    || __get_user(i32.mode, &info->mode)
 778	    || __get_user(i32.aperture_base, &info->aperture_base)
 779	    || __get_user(i32.aperture_size, &info->aperture_size)
 780	    || __get_user(i32.memory_allowed, &info->memory_allowed)
 781	    || __get_user(i32.memory_used, &info->memory_used)
 782	    || __get_user(i32.id_vendor, &info->id_vendor)
 783	    || __get_user(i32.id_device, &info->id_device))
 784		return -EFAULT;
 785
 786	if (copy_to_user(argp, &i32, sizeof(i32)))
 787		return -EFAULT;
 788
 789	return 0;
 790}
 791
 792typedef struct drm_agp_buffer32 {
 793	u32 size;	/**< In bytes -- will round to page boundary */
 794	u32 handle;	/**< Used for binding / unbinding */
 795	u32 type;	/**< Type of memory to allocate */
 796	u32 physical;	/**< Physical used by i810 */
 797} drm_agp_buffer32_t;
 798
 799static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
 800				unsigned long arg)
 801{
 802	drm_agp_buffer32_t __user *argp = (void __user *)arg;
 803	drm_agp_buffer32_t req32;
 804	struct drm_agp_buffer __user *request;
 805	int err;
 806
 807	if (copy_from_user(&req32, argp, sizeof(req32)))
 808		return -EFAULT;
 809
 810	request = compat_alloc_user_space(sizeof(*request));
 811	if (!request
 812	    || __put_user(req32.size, &request->size)
 813	    || __put_user(req32.type, &request->type))
 814		return -EFAULT;
 815
 816	err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
 817	if (err)
 818		return err;
 819
 820	if (__get_user(req32.handle, &request->handle)
 821	    || __get_user(req32.physical, &request->physical)
 822	    || copy_to_user(argp, &req32, sizeof(req32))) {
 823		drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
 824		return -EFAULT;
 825	}
 826
 827	return 0;
 828}
 829
 830static int compat_drm_agp_free(struct file *file, unsigned int cmd,
 831			       unsigned long arg)
 832{
 833	drm_agp_buffer32_t __user *argp = (void __user *)arg;
 834	struct drm_agp_buffer __user *request;
 835	u32 handle;
 836
 837	request = compat_alloc_user_space(sizeof(*request));
 838	if (!request
 839	    || get_user(handle, &argp->handle)
 840	    || __put_user(handle, &request->handle))
 841		return -EFAULT;
 842
 843	return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
 844}
 845
 846typedef struct drm_agp_binding32 {
 847	u32 handle;	/**< From drm_agp_buffer */
 848	u32 offset;	/**< In bytes -- will round to page boundary */
 849} drm_agp_binding32_t;
 850
 851static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
 852			       unsigned long arg)
 853{
 854	drm_agp_binding32_t __user *argp = (void __user *)arg;
 855	drm_agp_binding32_t req32;
 856	struct drm_agp_binding __user *request;
 857
 858	if (copy_from_user(&req32, argp, sizeof(req32)))
 859		return -EFAULT;
 860
 861	request = compat_alloc_user_space(sizeof(*request));
 862	if (!request
 863	    || __put_user(req32.handle, &request->handle)
 864	    || __put_user(req32.offset, &request->offset))
 865		return -EFAULT;
 866
 867	return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
 868}
 869
 870static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 871				 unsigned long arg)
 872{
 873	drm_agp_binding32_t __user *argp = (void __user *)arg;
 874	struct drm_agp_binding __user *request;
 875	u32 handle;
 876
 877	request = compat_alloc_user_space(sizeof(*request));
 878	if (!request
 879	    || get_user(handle, &argp->handle)
 880	    || __put_user(handle, &request->handle))
 881		return -EFAULT;
 882
 883	return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
 884}
 885#endif /* CONFIG_AGP */
 886
 887typedef struct drm_scatter_gather32 {
 888	u32 size;	/**< In bytes -- will round to page boundary */
 889	u32 handle;	/**< Used for mapping / unmapping */
 890} drm_scatter_gather32_t;
 891
 892static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
 893			       unsigned long arg)
 894{
 895	drm_scatter_gather32_t __user *argp = (void __user *)arg;
 896	struct drm_scatter_gather __user *request;
 897	int err;
 898	unsigned long x;
 899
 900	request = compat_alloc_user_space(sizeof(*request));
 901	if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 
 902	    || __get_user(x, &argp->size)
 903	    || __put_user(x, &request->size))
 904		return -EFAULT;
 905
 906	err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
 907	if (err)
 908		return err;
 909
 910	/* XXX not sure about the handle conversion here... */
 911	if (__get_user(x, &request->handle)
 912	    || __put_user(x >> PAGE_SHIFT, &argp->handle))
 913		return -EFAULT;
 914
 915	return 0;
 916}
 917
 918static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 919			      unsigned long arg)
 920{
 921	drm_scatter_gather32_t __user *argp = (void __user *)arg;
 922	struct drm_scatter_gather __user *request;
 923	unsigned long x;
 924
 925	request = compat_alloc_user_space(sizeof(*request));
 926	if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 
 927	    || __get_user(x, &argp->handle)
 928	    || __put_user(x << PAGE_SHIFT, &request->handle))
 929		return -EFAULT;
 930
 931	return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
 932}
 933
 934#if defined(CONFIG_X86) || defined(CONFIG_IA64)
 935typedef struct drm_update_draw32 {
 936	drm_drawable_t handle;
 937	unsigned int type;
 938	unsigned int num;
 939	/* 64-bit version has a 32-bit pad here */
 940	u64 data;	/**< Pointer */
 941} __attribute__((packed)) drm_update_draw32_t;
 942
 943static int compat_drm_update_draw(struct file *file, unsigned int cmd,
 944				  unsigned long arg)
 945{
 946	drm_update_draw32_t update32;
 947	struct drm_update_draw __user *request;
 948	int err;
 949
 950	if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
 951		return -EFAULT;
 952
 953	request = compat_alloc_user_space(sizeof(*request));
 954	if (!request ||
 955	    __put_user(update32.handle, &request->handle) ||
 956	    __put_user(update32.type, &request->type) ||
 957	    __put_user(update32.num, &request->num) ||
 958	    __put_user(update32.data, &request->data))
 959		return -EFAULT;
 960
 961	err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
 962	return err;
 963}
 964#endif
 965
 966struct drm_wait_vblank_request32 {
 967	enum drm_vblank_seq_type type;
 968	unsigned int sequence;
 969	u32 signal;
 970};
 971
 972struct drm_wait_vblank_reply32 {
 973	enum drm_vblank_seq_type type;
 974	unsigned int sequence;
 975	s32 tval_sec;
 976	s32 tval_usec;
 977};
 978
 979typedef union drm_wait_vblank32 {
 980	struct drm_wait_vblank_request32 request;
 981	struct drm_wait_vblank_reply32 reply;
 982} drm_wait_vblank32_t;
 983
 984static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
 985				  unsigned long arg)
 986{
 987	drm_wait_vblank32_t __user *argp = (void __user *)arg;
 988	drm_wait_vblank32_t req32;
 989	union drm_wait_vblank __user *request;
 990	int err;
 991
 992	if (copy_from_user(&req32, argp, sizeof(req32)))
 993		return -EFAULT;
 994
 995	request = compat_alloc_user_space(sizeof(*request));
 996	if (!request
 997	    || __put_user(req32.request.type, &request->request.type)
 998	    || __put_user(req32.request.sequence, &request->request.sequence)
 999	    || __put_user(req32.request.signal, &request->request.signal))
1000		return -EFAULT;
1001
1002	err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1003	if (err)
1004		return err;
1005
1006	if (__get_user(req32.reply.type, &request->reply.type)
1007	    || __get_user(req32.reply.sequence, &request->reply.sequence)
1008	    || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1009	    || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1010		return -EFAULT;
1011
1012	if (copy_to_user(argp, &req32, sizeof(req32)))
1013		return -EFAULT;
1014
1015	return 0;
1016}
1017
1018typedef struct drm_mode_fb_cmd232 {
1019	u32 fb_id;
1020	u32 width;
1021	u32 height;
1022	u32 pixel_format;
1023	u32 flags;
1024	u32 handles[4];
1025	u32 pitches[4];
1026	u32 offsets[4];
1027	u64 modifier[4];
1028} __attribute__((packed)) drm_mode_fb_cmd232_t;
1029
1030static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
1031				  unsigned long arg)
1032{
1033	struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
1034	struct drm_mode_fb_cmd232 req32;
1035	struct drm_mode_fb_cmd2 __user *req64;
1036	int i;
1037	int err;
1038
1039	if (copy_from_user(&req32, argp, sizeof(req32)))
1040		return -EFAULT;
1041
1042	req64 = compat_alloc_user_space(sizeof(*req64));
1043
1044	if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64))
1045	    || __put_user(req32.width, &req64->width)
1046	    || __put_user(req32.height, &req64->height)
1047	    || __put_user(req32.pixel_format, &req64->pixel_format)
1048	    || __put_user(req32.flags, &req64->flags))
1049		return -EFAULT;
1050
1051	for (i = 0; i < 4; i++) {
1052		if (__put_user(req32.handles[i], &req64->handles[i]))
1053			return -EFAULT;
1054		if (__put_user(req32.pitches[i], &req64->pitches[i]))
1055			return -EFAULT;
1056		if (__put_user(req32.offsets[i], &req64->offsets[i]))
1057			return -EFAULT;
1058		if (__put_user(req32.modifier[i], &req64->modifier[i]))
1059			return -EFAULT;
1060	}
1061
1062	err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64);
1063	if (err)
1064		return err;
1065
1066	if (__get_user(req32.fb_id, &req64->fb_id))
1067		return -EFAULT;
1068
1069	if (copy_to_user(argp, &req32, sizeof(req32)))
1070		return -EFAULT;
1071
1072	return 0;
1073}
1074
1075static drm_ioctl_compat_t *drm_compat_ioctls[] = {
1076	[DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1077	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1078	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1079	[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1080	[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1081	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1082	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1083	[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1084	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1085	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1086	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1087	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1088	[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1089	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1090	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1091	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1092	[DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1093#if IS_ENABLED(CONFIG_AGP)
1094	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1095	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1096	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1097	[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1098	[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1099	[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1100#endif
1101	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1102	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1103#if defined(CONFIG_X86) || defined(CONFIG_IA64)
1104	[DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1105#endif
1106	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1107	[DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2,
1108};
1109
1110/**
1111 * Called whenever a 32-bit process running under a 64-bit kernel
1112 * performs an ioctl on /dev/drm.
1113 *
1114 * \param file_priv DRM file private.
1115 * \param cmd command.
1116 * \param arg user argument.
1117 * \return zero on success or negative number on failure.
1118 */
1119long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1120{
1121	unsigned int nr = DRM_IOCTL_NR(cmd);
1122	drm_ioctl_compat_t *fn;
1123	int ret;
1124
1125	/* Assume that ioctls without an explicit compat routine will just
1126	 * work.  This may not always be a good assumption, but it's better
1127	 * than always failing.
1128	 */
1129	if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1130		return drm_ioctl(filp, cmd, arg);
1131
1132	fn = drm_compat_ioctls[nr];
1133
1134	if (fn != NULL)
1135		ret = (*fn) (filp, cmd, arg);
1136	else
1137		ret = drm_ioctl(filp, cmd, arg);
1138
1139	return ret;
1140}
1141
1142EXPORT_SYMBOL(drm_compat_ioctl);
v3.1
   1/**
   2 * \file drm_ioc32.c
   3 *
   4 * 32-bit ioctl compatibility routines for the DRM.
   5 *
   6 * \author Paul Mackerras <paulus@samba.org>
   7 *
   8 * Copyright (C) Paul Mackerras 2005.
   9 * All Rights Reserved.
  10 *
  11 * Permission is hereby granted, free of charge, to any person obtaining a
  12 * copy of this software and associated documentation files (the "Software"),
  13 * to deal in the Software without restriction, including without limitation
  14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15 * and/or sell copies of the Software, and to permit persons to whom the
  16 * Software is furnished to do so, subject to the following conditions:
  17 *
  18 * The above copyright notice and this permission notice (including the next
  19 * paragraph) shall be included in all copies or substantial portions of the
  20 * Software.
  21 *
  22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  28 * IN THE SOFTWARE.
  29 */
  30#include <linux/compat.h>
  31#include <linux/ratelimit.h>
 
  32
  33#include "drmP.h"
  34#include "drm_core.h"
  35
  36#define DRM_IOCTL_VERSION32		DRM_IOWR(0x00, drm_version32_t)
  37#define DRM_IOCTL_GET_UNIQUE32		DRM_IOWR(0x01, drm_unique32_t)
  38#define DRM_IOCTL_GET_MAP32		DRM_IOWR(0x04, drm_map32_t)
  39#define DRM_IOCTL_GET_CLIENT32		DRM_IOWR(0x05, drm_client32_t)
  40#define DRM_IOCTL_GET_STATS32		DRM_IOR( 0x06, drm_stats32_t)
  41
  42#define DRM_IOCTL_SET_UNIQUE32		DRM_IOW( 0x10, drm_unique32_t)
  43#define DRM_IOCTL_ADD_MAP32		DRM_IOWR(0x15, drm_map32_t)
  44#define DRM_IOCTL_ADD_BUFS32		DRM_IOWR(0x16, drm_buf_desc32_t)
  45#define DRM_IOCTL_MARK_BUFS32		DRM_IOW( 0x17, drm_buf_desc32_t)
  46#define DRM_IOCTL_INFO_BUFS32		DRM_IOWR(0x18, drm_buf_info32_t)
  47#define DRM_IOCTL_MAP_BUFS32		DRM_IOWR(0x19, drm_buf_map32_t)
  48#define DRM_IOCTL_FREE_BUFS32		DRM_IOW( 0x1a, drm_buf_free32_t)
  49
  50#define DRM_IOCTL_RM_MAP32		DRM_IOW( 0x1b, drm_map32_t)
  51
  52#define DRM_IOCTL_SET_SAREA_CTX32	DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
  53#define DRM_IOCTL_GET_SAREA_CTX32	DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
  54
  55#define DRM_IOCTL_RES_CTX32		DRM_IOWR(0x26, drm_ctx_res32_t)
  56#define DRM_IOCTL_DMA32			DRM_IOWR(0x29, drm_dma32_t)
  57
  58#define DRM_IOCTL_AGP_ENABLE32		DRM_IOW( 0x32, drm_agp_mode32_t)
  59#define DRM_IOCTL_AGP_INFO32		DRM_IOR( 0x33, drm_agp_info32_t)
  60#define DRM_IOCTL_AGP_ALLOC32		DRM_IOWR(0x34, drm_agp_buffer32_t)
  61#define DRM_IOCTL_AGP_FREE32		DRM_IOW( 0x35, drm_agp_buffer32_t)
  62#define DRM_IOCTL_AGP_BIND32		DRM_IOW( 0x36, drm_agp_binding32_t)
  63#define DRM_IOCTL_AGP_UNBIND32		DRM_IOW( 0x37, drm_agp_binding32_t)
  64
  65#define DRM_IOCTL_SG_ALLOC32		DRM_IOW( 0x38, drm_scatter_gather32_t)
  66#define DRM_IOCTL_SG_FREE32		DRM_IOW( 0x39, drm_scatter_gather32_t)
  67
  68#define DRM_IOCTL_UPDATE_DRAW32		DRM_IOW( 0x3f, drm_update_draw32_t)
  69
  70#define DRM_IOCTL_WAIT_VBLANK32		DRM_IOWR(0x3a, drm_wait_vblank32_t)
  71
 
 
  72typedef struct drm_version_32 {
  73	int version_major;	  /**< Major version */
  74	int version_minor;	  /**< Minor version */
  75	int version_patchlevel;	   /**< Patch level */
  76	u32 name_len;		  /**< Length of name buffer */
  77	u32 name;		  /**< Name of driver */
  78	u32 date_len;		  /**< Length of date buffer */
  79	u32 date;		  /**< User-space buffer to hold date */
  80	u32 desc_len;		  /**< Length of desc buffer */
  81	u32 desc;		  /**< User-space buffer to hold desc */
  82} drm_version32_t;
  83
  84static int compat_drm_version(struct file *file, unsigned int cmd,
  85			      unsigned long arg)
  86{
  87	drm_version32_t v32;
  88	struct drm_version __user *version;
  89	int err;
  90
  91	if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
  92		return -EFAULT;
  93
  94	version = compat_alloc_user_space(sizeof(*version));
  95	if (!access_ok(VERIFY_WRITE, version, sizeof(*version)))
  96		return -EFAULT;
  97	if (__put_user(v32.name_len, &version->name_len)
  98	    || __put_user((void __user *)(unsigned long)v32.name,
  99			  &version->name)
 100	    || __put_user(v32.date_len, &version->date_len)
 101	    || __put_user((void __user *)(unsigned long)v32.date,
 102			  &version->date)
 103	    || __put_user(v32.desc_len, &version->desc_len)
 104	    || __put_user((void __user *)(unsigned long)v32.desc,
 105			  &version->desc))
 106		return -EFAULT;
 107
 108	err = drm_ioctl(file,
 109			DRM_IOCTL_VERSION, (unsigned long)version);
 110	if (err)
 111		return err;
 112
 113	if (__get_user(v32.version_major, &version->version_major)
 114	    || __get_user(v32.version_minor, &version->version_minor)
 115	    || __get_user(v32.version_patchlevel, &version->version_patchlevel)
 116	    || __get_user(v32.name_len, &version->name_len)
 117	    || __get_user(v32.date_len, &version->date_len)
 118	    || __get_user(v32.desc_len, &version->desc_len))
 119		return -EFAULT;
 120
 121	if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
 122		return -EFAULT;
 123	return 0;
 124}
 125
 126typedef struct drm_unique32 {
 127	u32 unique_len;	/**< Length of unique */
 128	u32 unique;	/**< Unique name for driver instantiation */
 129} drm_unique32_t;
 130
 131static int compat_drm_getunique(struct file *file, unsigned int cmd,
 132				unsigned long arg)
 133{
 134	drm_unique32_t uq32;
 135	struct drm_unique __user *u;
 136	int err;
 137
 138	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 139		return -EFAULT;
 140
 141	u = compat_alloc_user_space(sizeof(*u));
 142	if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
 143		return -EFAULT;
 144	if (__put_user(uq32.unique_len, &u->unique_len)
 145	    || __put_user((void __user *)(unsigned long)uq32.unique,
 146			  &u->unique))
 147		return -EFAULT;
 148
 149	err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
 150	if (err)
 151		return err;
 152
 153	if (__get_user(uq32.unique_len, &u->unique_len))
 154		return -EFAULT;
 155	if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
 156		return -EFAULT;
 157	return 0;
 158}
 159
 160static int compat_drm_setunique(struct file *file, unsigned int cmd,
 161				unsigned long arg)
 162{
 163	drm_unique32_t uq32;
 164	struct drm_unique __user *u;
 165
 166	if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 167		return -EFAULT;
 168
 169	u = compat_alloc_user_space(sizeof(*u));
 170	if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
 171		return -EFAULT;
 172	if (__put_user(uq32.unique_len, &u->unique_len)
 173	    || __put_user((void __user *)(unsigned long)uq32.unique,
 174			  &u->unique))
 175		return -EFAULT;
 176
 177	return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
 178}
 179
 180typedef struct drm_map32 {
 181	u32 offset;		/**< Requested physical address (0 for SAREA)*/
 182	u32 size;		/**< Requested physical size (bytes) */
 183	enum drm_map_type type;	/**< Type of memory to map */
 184	enum drm_map_flags flags;	/**< Flags */
 185	u32 handle;		/**< User-space: "Handle" to pass to mmap() */
 186	int mtrr;		/**< MTRR slot used */
 187} drm_map32_t;
 188
 189static int compat_drm_getmap(struct file *file, unsigned int cmd,
 190			     unsigned long arg)
 191{
 192	drm_map32_t __user *argp = (void __user *)arg;
 193	drm_map32_t m32;
 194	struct drm_map __user *map;
 195	int idx, err;
 196	void *handle;
 197
 198	if (get_user(idx, &argp->offset))
 199		return -EFAULT;
 200
 201	map = compat_alloc_user_space(sizeof(*map));
 202	if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
 203		return -EFAULT;
 204	if (__put_user(idx, &map->offset))
 205		return -EFAULT;
 206
 207	err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
 208	if (err)
 209		return err;
 210
 211	if (__get_user(m32.offset, &map->offset)
 212	    || __get_user(m32.size, &map->size)
 213	    || __get_user(m32.type, &map->type)
 214	    || __get_user(m32.flags, &map->flags)
 215	    || __get_user(handle, &map->handle)
 216	    || __get_user(m32.mtrr, &map->mtrr))
 217		return -EFAULT;
 218
 219	m32.handle = (unsigned long)handle;
 220	if (copy_to_user(argp, &m32, sizeof(m32)))
 221		return -EFAULT;
 222	return 0;
 223
 224}
 225
 226static int compat_drm_addmap(struct file *file, unsigned int cmd,
 227			     unsigned long arg)
 228{
 229	drm_map32_t __user *argp = (void __user *)arg;
 230	drm_map32_t m32;
 231	struct drm_map __user *map;
 232	int err;
 233	void *handle;
 234
 235	if (copy_from_user(&m32, argp, sizeof(m32)))
 236		return -EFAULT;
 237
 238	map = compat_alloc_user_space(sizeof(*map));
 239	if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
 240		return -EFAULT;
 241	if (__put_user(m32.offset, &map->offset)
 242	    || __put_user(m32.size, &map->size)
 243	    || __put_user(m32.type, &map->type)
 244	    || __put_user(m32.flags, &map->flags))
 245		return -EFAULT;
 246
 247	err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map);
 248	if (err)
 249		return err;
 250
 251	if (__get_user(m32.offset, &map->offset)
 252	    || __get_user(m32.mtrr, &map->mtrr)
 253	    || __get_user(handle, &map->handle))
 254		return -EFAULT;
 255
 256	m32.handle = (unsigned long)handle;
 257	if (m32.handle != (unsigned long)handle)
 258		printk_ratelimited(KERN_ERR "compat_drm_addmap truncated handle"
 259				   " %p for type %d offset %x\n",
 260				   handle, m32.type, m32.offset);
 261
 262	if (copy_to_user(argp, &m32, sizeof(m32)))
 263		return -EFAULT;
 264
 265	return 0;
 266}
 267
 268static int compat_drm_rmmap(struct file *file, unsigned int cmd,
 269			    unsigned long arg)
 270{
 271	drm_map32_t __user *argp = (void __user *)arg;
 272	struct drm_map __user *map;
 273	u32 handle;
 274
 275	if (get_user(handle, &argp->handle))
 276		return -EFAULT;
 277
 278	map = compat_alloc_user_space(sizeof(*map));
 279	if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
 280		return -EFAULT;
 281	if (__put_user((void *)(unsigned long)handle, &map->handle))
 282		return -EFAULT;
 283
 284	return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
 285}
 286
 287typedef struct drm_client32 {
 288	int idx;	/**< Which client desired? */
 289	int auth;	/**< Is client authenticated? */
 290	u32 pid;	/**< Process ID */
 291	u32 uid;	/**< User ID */
 292	u32 magic;	/**< Magic */
 293	u32 iocs;	/**< Ioctl count */
 294} drm_client32_t;
 295
 296static int compat_drm_getclient(struct file *file, unsigned int cmd,
 297				unsigned long arg)
 298{
 299	drm_client32_t c32;
 300	drm_client32_t __user *argp = (void __user *)arg;
 301	struct drm_client __user *client;
 302	int idx, err;
 303
 304	if (get_user(idx, &argp->idx))
 305		return -EFAULT;
 306
 307	client = compat_alloc_user_space(sizeof(*client));
 308	if (!access_ok(VERIFY_WRITE, client, sizeof(*client)))
 309		return -EFAULT;
 310	if (__put_user(idx, &client->idx))
 311		return -EFAULT;
 312
 313	err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
 314	if (err)
 315		return err;
 316
 317	if (__get_user(c32.auth, &client->auth)
 
 318	    || __get_user(c32.pid, &client->pid)
 319	    || __get_user(c32.uid, &client->uid)
 320	    || __get_user(c32.magic, &client->magic)
 321	    || __get_user(c32.iocs, &client->iocs))
 322		return -EFAULT;
 323
 324	if (copy_to_user(argp, &c32, sizeof(c32)))
 325		return -EFAULT;
 326	return 0;
 327}
 328
 329typedef struct drm_stats32 {
 330	u32 count;
 331	struct {
 332		u32 value;
 333		enum drm_stat_type type;
 334	} data[15];
 335} drm_stats32_t;
 336
 337static int compat_drm_getstats(struct file *file, unsigned int cmd,
 338			       unsigned long arg)
 339{
 340	drm_stats32_t s32;
 341	drm_stats32_t __user *argp = (void __user *)arg;
 342	struct drm_stats __user *stats;
 343	int i, err;
 344
 345	stats = compat_alloc_user_space(sizeof(*stats));
 346	if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats)))
 347		return -EFAULT;
 348
 349	err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
 350	if (err)
 351		return err;
 352
 353	if (__get_user(s32.count, &stats->count))
 354		return -EFAULT;
 355	for (i = 0; i < 15; ++i)
 356		if (__get_user(s32.data[i].value, &stats->data[i].value)
 357		    || __get_user(s32.data[i].type, &stats->data[i].type))
 358			return -EFAULT;
 359
 360	if (copy_to_user(argp, &s32, sizeof(s32)))
 361		return -EFAULT;
 362	return 0;
 363}
 364
 365typedef struct drm_buf_desc32 {
 366	int count;		 /**< Number of buffers of this size */
 367	int size;		 /**< Size in bytes */
 368	int low_mark;		 /**< Low water mark */
 369	int high_mark;		 /**< High water mark */
 370	int flags;
 371	u32 agp_start;		 /**< Start address in the AGP aperture */
 372} drm_buf_desc32_t;
 373
 374static int compat_drm_addbufs(struct file *file, unsigned int cmd,
 375			      unsigned long arg)
 376{
 377	drm_buf_desc32_t __user *argp = (void __user *)arg;
 378	struct drm_buf_desc __user *buf;
 379	int err;
 380	unsigned long agp_start;
 381
 382	buf = compat_alloc_user_space(sizeof(*buf));
 383	if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf))
 384	    || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
 385		return -EFAULT;
 386
 387	if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
 388	    || __get_user(agp_start, &argp->agp_start)
 389	    || __put_user(agp_start, &buf->agp_start))
 390		return -EFAULT;
 391
 392	err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
 393	if (err)
 394		return err;
 395
 396	if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
 397	    || __get_user(agp_start, &buf->agp_start)
 398	    || __put_user(agp_start, &argp->agp_start))
 399		return -EFAULT;
 400
 401	return 0;
 402}
 403
 404static int compat_drm_markbufs(struct file *file, unsigned int cmd,
 405			       unsigned long arg)
 406{
 407	drm_buf_desc32_t b32;
 408	drm_buf_desc32_t __user *argp = (void __user *)arg;
 409	struct drm_buf_desc __user *buf;
 410
 411	if (copy_from_user(&b32, argp, sizeof(b32)))
 412		return -EFAULT;
 413
 414	buf = compat_alloc_user_space(sizeof(*buf));
 415	if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf)))
 416		return -EFAULT;
 417
 418	if (__put_user(b32.size, &buf->size)
 419	    || __put_user(b32.low_mark, &buf->low_mark)
 420	    || __put_user(b32.high_mark, &buf->high_mark))
 421		return -EFAULT;
 422
 423	return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
 424}
 425
 426typedef struct drm_buf_info32 {
 427	int count;		/**< Entries in list */
 428	u32 list;
 429} drm_buf_info32_t;
 430
 431static int compat_drm_infobufs(struct file *file, unsigned int cmd,
 432			       unsigned long arg)
 433{
 434	drm_buf_info32_t req32;
 435	drm_buf_info32_t __user *argp = (void __user *)arg;
 436	drm_buf_desc32_t __user *to;
 437	struct drm_buf_info __user *request;
 438	struct drm_buf_desc __user *list;
 439	size_t nbytes;
 440	int i, err;
 441	int count, actual;
 442
 443	if (copy_from_user(&req32, argp, sizeof(req32)))
 444		return -EFAULT;
 445
 446	count = req32.count;
 447	to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
 448	if (count < 0)
 449		count = 0;
 450	if (count > 0
 451	    && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
 452		return -EFAULT;
 453
 454	nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
 455	request = compat_alloc_user_space(nbytes);
 456	if (!access_ok(VERIFY_WRITE, request, nbytes))
 457		return -EFAULT;
 458	list = (struct drm_buf_desc *) (request + 1);
 459
 460	if (__put_user(count, &request->count)
 461	    || __put_user(list, &request->list))
 462		return -EFAULT;
 463
 464	err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
 465	if (err)
 466		return err;
 467
 468	if (__get_user(actual, &request->count))
 469		return -EFAULT;
 470	if (count >= actual)
 471		for (i = 0; i < actual; ++i)
 472			if (__copy_in_user(&to[i], &list[i],
 473					   offsetof(struct drm_buf_desc, flags)))
 474				return -EFAULT;
 475
 476	if (__put_user(actual, &argp->count))
 477		return -EFAULT;
 478
 479	return 0;
 480}
 481
 482typedef struct drm_buf_pub32 {
 483	int idx;		/**< Index into the master buffer list */
 484	int total;		/**< Buffer size */
 485	int used;		/**< Amount of buffer in use (for DMA) */
 486	u32 address;		/**< Address of buffer */
 487} drm_buf_pub32_t;
 488
 489typedef struct drm_buf_map32 {
 490	int count;		/**< Length of the buffer list */
 491	u32 virtual;		/**< Mmap'd area in user-virtual */
 492	u32 list;		/**< Buffer information */
 493} drm_buf_map32_t;
 494
 495static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
 496			      unsigned long arg)
 497{
 498	drm_buf_map32_t __user *argp = (void __user *)arg;
 499	drm_buf_map32_t req32;
 500	drm_buf_pub32_t __user *list32;
 501	struct drm_buf_map __user *request;
 502	struct drm_buf_pub __user *list;
 503	int i, err;
 504	int count, actual;
 505	size_t nbytes;
 506	void __user *addr;
 507
 508	if (copy_from_user(&req32, argp, sizeof(req32)))
 509		return -EFAULT;
 510	count = req32.count;
 511	list32 = (void __user *)(unsigned long)req32.list;
 512
 513	if (count < 0)
 514		return -EINVAL;
 515	nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
 516	request = compat_alloc_user_space(nbytes);
 517	if (!access_ok(VERIFY_WRITE, request, nbytes))
 518		return -EFAULT;
 519	list = (struct drm_buf_pub *) (request + 1);
 520
 521	if (__put_user(count, &request->count)
 522	    || __put_user(list, &request->list))
 523		return -EFAULT;
 524
 525	err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
 526	if (err)
 527		return err;
 528
 529	if (__get_user(actual, &request->count))
 530		return -EFAULT;
 531	if (count >= actual)
 532		for (i = 0; i < actual; ++i)
 533			if (__copy_in_user(&list32[i], &list[i],
 534					   offsetof(struct drm_buf_pub, address))
 535			    || __get_user(addr, &list[i].address)
 536			    || __put_user((unsigned long)addr,
 537					  &list32[i].address))
 538				return -EFAULT;
 539
 540	if (__put_user(actual, &argp->count)
 541	    || __get_user(addr, &request->virtual)
 542	    || __put_user((unsigned long)addr, &argp->virtual))
 543		return -EFAULT;
 544
 545	return 0;
 546}
 547
 548typedef struct drm_buf_free32 {
 549	int count;
 550	u32 list;
 551} drm_buf_free32_t;
 552
 553static int compat_drm_freebufs(struct file *file, unsigned int cmd,
 554			       unsigned long arg)
 555{
 556	drm_buf_free32_t req32;
 557	struct drm_buf_free __user *request;
 558	drm_buf_free32_t __user *argp = (void __user *)arg;
 559
 560	if (copy_from_user(&req32, argp, sizeof(req32)))
 561		return -EFAULT;
 562
 563	request = compat_alloc_user_space(sizeof(*request));
 564	if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
 565		return -EFAULT;
 566	if (__put_user(req32.count, &request->count)
 567	    || __put_user((int __user *)(unsigned long)req32.list,
 568			  &request->list))
 569		return -EFAULT;
 570
 571	return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
 572}
 573
 574typedef struct drm_ctx_priv_map32 {
 575	unsigned int ctx_id;	 /**< Context requesting private mapping */
 576	u32 handle;		/**< Handle of map */
 577} drm_ctx_priv_map32_t;
 578
 579static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
 580				  unsigned long arg)
 581{
 582	drm_ctx_priv_map32_t req32;
 583	struct drm_ctx_priv_map __user *request;
 584	drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 585
 586	if (copy_from_user(&req32, argp, sizeof(req32)))
 587		return -EFAULT;
 588
 589	request = compat_alloc_user_space(sizeof(*request));
 590	if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
 591		return -EFAULT;
 592	if (__put_user(req32.ctx_id, &request->ctx_id)
 593	    || __put_user((void *)(unsigned long)req32.handle,
 594			  &request->handle))
 595		return -EFAULT;
 596
 597	return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
 598}
 599
 600static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
 601				  unsigned long arg)
 602{
 603	struct drm_ctx_priv_map __user *request;
 604	drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 605	int err;
 606	unsigned int ctx_id;
 607	void *handle;
 608
 609	if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 610	    || __get_user(ctx_id, &argp->ctx_id))
 611		return -EFAULT;
 612
 613	request = compat_alloc_user_space(sizeof(*request));
 614	if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
 615		return -EFAULT;
 616	if (__put_user(ctx_id, &request->ctx_id))
 617		return -EFAULT;
 618
 619	err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
 620	if (err)
 621		return err;
 622
 623	if (__get_user(handle, &request->handle)
 624	    || __put_user((unsigned long)handle, &argp->handle))
 625		return -EFAULT;
 626
 627	return 0;
 628}
 629
 630typedef struct drm_ctx_res32 {
 631	int count;
 632	u32 contexts;
 633} drm_ctx_res32_t;
 634
 635static int compat_drm_resctx(struct file *file, unsigned int cmd,
 636			     unsigned long arg)
 637{
 638	drm_ctx_res32_t __user *argp = (void __user *)arg;
 639	drm_ctx_res32_t res32;
 640	struct drm_ctx_res __user *res;
 641	int err;
 642
 643	if (copy_from_user(&res32, argp, sizeof(res32)))
 644		return -EFAULT;
 645
 646	res = compat_alloc_user_space(sizeof(*res));
 647	if (!access_ok(VERIFY_WRITE, res, sizeof(*res)))
 648		return -EFAULT;
 649	if (__put_user(res32.count, &res->count)
 650	    || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
 651			  &res->contexts))
 652		return -EFAULT;
 653
 654	err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
 655	if (err)
 656		return err;
 657
 658	if (__get_user(res32.count, &res->count)
 659	    || __put_user(res32.count, &argp->count))
 660		return -EFAULT;
 661
 662	return 0;
 663}
 664
 665typedef struct drm_dma32 {
 666	int context;		  /**< Context handle */
 667	int send_count;		  /**< Number of buffers to send */
 668	u32 send_indices;	  /**< List of handles to buffers */
 669	u32 send_sizes;		  /**< Lengths of data to send */
 670	enum drm_dma_flags flags;		  /**< Flags */
 671	int request_count;	  /**< Number of buffers requested */
 672	int request_size;	  /**< Desired size for buffers */
 673	u32 request_indices;	  /**< Buffer information */
 674	u32 request_sizes;
 675	int granted_count;	  /**< Number of buffers granted */
 676} drm_dma32_t;
 677
 678static int compat_drm_dma(struct file *file, unsigned int cmd,
 679			  unsigned long arg)
 680{
 681	drm_dma32_t d32;
 682	drm_dma32_t __user *argp = (void __user *)arg;
 683	struct drm_dma __user *d;
 684	int err;
 685
 686	if (copy_from_user(&d32, argp, sizeof(d32)))
 687		return -EFAULT;
 688
 689	d = compat_alloc_user_space(sizeof(*d));
 690	if (!access_ok(VERIFY_WRITE, d, sizeof(*d)))
 691		return -EFAULT;
 692
 693	if (__put_user(d32.context, &d->context)
 694	    || __put_user(d32.send_count, &d->send_count)
 695	    || __put_user((int __user *)(unsigned long)d32.send_indices,
 696			  &d->send_indices)
 697	    || __put_user((int __user *)(unsigned long)d32.send_sizes,
 698			  &d->send_sizes)
 699	    || __put_user(d32.flags, &d->flags)
 700	    || __put_user(d32.request_count, &d->request_count)
 701	    || __put_user((int __user *)(unsigned long)d32.request_indices,
 702			  &d->request_indices)
 703	    || __put_user((int __user *)(unsigned long)d32.request_sizes,
 704			  &d->request_sizes))
 705		return -EFAULT;
 706
 707	err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
 708	if (err)
 709		return err;
 710
 711	if (__get_user(d32.request_size, &d->request_size)
 712	    || __get_user(d32.granted_count, &d->granted_count)
 713	    || __put_user(d32.request_size, &argp->request_size)
 714	    || __put_user(d32.granted_count, &argp->granted_count))
 715		return -EFAULT;
 716
 717	return 0;
 718}
 719
 720#if __OS_HAS_AGP
 721typedef struct drm_agp_mode32 {
 722	u32 mode;	/**< AGP mode */
 723} drm_agp_mode32_t;
 724
 725static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
 726				 unsigned long arg)
 727{
 728	drm_agp_mode32_t __user *argp = (void __user *)arg;
 729	drm_agp_mode32_t m32;
 730	struct drm_agp_mode __user *mode;
 731
 732	if (get_user(m32.mode, &argp->mode))
 733		return -EFAULT;
 734
 735	mode = compat_alloc_user_space(sizeof(*mode));
 736	if (put_user(m32.mode, &mode->mode))
 737		return -EFAULT;
 738
 739	return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
 740}
 741
 742typedef struct drm_agp_info32 {
 743	int agp_version_major;
 744	int agp_version_minor;
 745	u32 mode;
 746	u32 aperture_base;	/* physical address */
 747	u32 aperture_size;	/* bytes */
 748	u32 memory_allowed;	/* bytes */
 749	u32 memory_used;
 750
 751	/* PCI information */
 752	unsigned short id_vendor;
 753	unsigned short id_device;
 754} drm_agp_info32_t;
 755
 756static int compat_drm_agp_info(struct file *file, unsigned int cmd,
 757			       unsigned long arg)
 758{
 759	drm_agp_info32_t __user *argp = (void __user *)arg;
 760	drm_agp_info32_t i32;
 761	struct drm_agp_info __user *info;
 762	int err;
 763
 764	info = compat_alloc_user_space(sizeof(*info));
 765	if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
 766		return -EFAULT;
 767
 768	err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
 769	if (err)
 770		return err;
 771
 772	if (__get_user(i32.agp_version_major, &info->agp_version_major)
 773	    || __get_user(i32.agp_version_minor, &info->agp_version_minor)
 774	    || __get_user(i32.mode, &info->mode)
 775	    || __get_user(i32.aperture_base, &info->aperture_base)
 776	    || __get_user(i32.aperture_size, &info->aperture_size)
 777	    || __get_user(i32.memory_allowed, &info->memory_allowed)
 778	    || __get_user(i32.memory_used, &info->memory_used)
 779	    || __get_user(i32.id_vendor, &info->id_vendor)
 780	    || __get_user(i32.id_device, &info->id_device))
 781		return -EFAULT;
 782
 783	if (copy_to_user(argp, &i32, sizeof(i32)))
 784		return -EFAULT;
 785
 786	return 0;
 787}
 788
 789typedef struct drm_agp_buffer32 {
 790	u32 size;	/**< In bytes -- will round to page boundary */
 791	u32 handle;	/**< Used for binding / unbinding */
 792	u32 type;	/**< Type of memory to allocate */
 793	u32 physical;	/**< Physical used by i810 */
 794} drm_agp_buffer32_t;
 795
 796static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
 797				unsigned long arg)
 798{
 799	drm_agp_buffer32_t __user *argp = (void __user *)arg;
 800	drm_agp_buffer32_t req32;
 801	struct drm_agp_buffer __user *request;
 802	int err;
 803
 804	if (copy_from_user(&req32, argp, sizeof(req32)))
 805		return -EFAULT;
 806
 807	request = compat_alloc_user_space(sizeof(*request));
 808	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 809	    || __put_user(req32.size, &request->size)
 810	    || __put_user(req32.type, &request->type))
 811		return -EFAULT;
 812
 813	err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
 814	if (err)
 815		return err;
 816
 817	if (__get_user(req32.handle, &request->handle)
 818	    || __get_user(req32.physical, &request->physical)
 819	    || copy_to_user(argp, &req32, sizeof(req32))) {
 820		drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
 821		return -EFAULT;
 822	}
 823
 824	return 0;
 825}
 826
 827static int compat_drm_agp_free(struct file *file, unsigned int cmd,
 828			       unsigned long arg)
 829{
 830	drm_agp_buffer32_t __user *argp = (void __user *)arg;
 831	struct drm_agp_buffer __user *request;
 832	u32 handle;
 833
 834	request = compat_alloc_user_space(sizeof(*request));
 835	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 836	    || get_user(handle, &argp->handle)
 837	    || __put_user(handle, &request->handle))
 838		return -EFAULT;
 839
 840	return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
 841}
 842
 843typedef struct drm_agp_binding32 {
 844	u32 handle;	/**< From drm_agp_buffer */
 845	u32 offset;	/**< In bytes -- will round to page boundary */
 846} drm_agp_binding32_t;
 847
 848static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
 849			       unsigned long arg)
 850{
 851	drm_agp_binding32_t __user *argp = (void __user *)arg;
 852	drm_agp_binding32_t req32;
 853	struct drm_agp_binding __user *request;
 854
 855	if (copy_from_user(&req32, argp, sizeof(req32)))
 856		return -EFAULT;
 857
 858	request = compat_alloc_user_space(sizeof(*request));
 859	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 860	    || __put_user(req32.handle, &request->handle)
 861	    || __put_user(req32.offset, &request->offset))
 862		return -EFAULT;
 863
 864	return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
 865}
 866
 867static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 868				 unsigned long arg)
 869{
 870	drm_agp_binding32_t __user *argp = (void __user *)arg;
 871	struct drm_agp_binding __user *request;
 872	u32 handle;
 873
 874	request = compat_alloc_user_space(sizeof(*request));
 875	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 876	    || get_user(handle, &argp->handle)
 877	    || __put_user(handle, &request->handle))
 878		return -EFAULT;
 879
 880	return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
 881}
 882#endif				/* __OS_HAS_AGP */
 883
 884typedef struct drm_scatter_gather32 {
 885	u32 size;	/**< In bytes -- will round to page boundary */
 886	u32 handle;	/**< Used for mapping / unmapping */
 887} drm_scatter_gather32_t;
 888
 889static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
 890			       unsigned long arg)
 891{
 892	drm_scatter_gather32_t __user *argp = (void __user *)arg;
 893	struct drm_scatter_gather __user *request;
 894	int err;
 895	unsigned long x;
 896
 897	request = compat_alloc_user_space(sizeof(*request));
 898	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 899	    || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 900	    || __get_user(x, &argp->size)
 901	    || __put_user(x, &request->size))
 902		return -EFAULT;
 903
 904	err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
 905	if (err)
 906		return err;
 907
 908	/* XXX not sure about the handle conversion here... */
 909	if (__get_user(x, &request->handle)
 910	    || __put_user(x >> PAGE_SHIFT, &argp->handle))
 911		return -EFAULT;
 912
 913	return 0;
 914}
 915
 916static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 917			      unsigned long arg)
 918{
 919	drm_scatter_gather32_t __user *argp = (void __user *)arg;
 920	struct drm_scatter_gather __user *request;
 921	unsigned long x;
 922
 923	request = compat_alloc_user_space(sizeof(*request));
 924	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 925	    || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 926	    || __get_user(x, &argp->handle)
 927	    || __put_user(x << PAGE_SHIFT, &request->handle))
 928		return -EFAULT;
 929
 930	return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
 931}
 932
 933#if defined(CONFIG_X86) || defined(CONFIG_IA64)
 934typedef struct drm_update_draw32 {
 935	drm_drawable_t handle;
 936	unsigned int type;
 937	unsigned int num;
 938	/* 64-bit version has a 32-bit pad here */
 939	u64 data;	/**< Pointer */
 940} __attribute__((packed)) drm_update_draw32_t;
 941
 942static int compat_drm_update_draw(struct file *file, unsigned int cmd,
 943				  unsigned long arg)
 944{
 945	drm_update_draw32_t update32;
 946	struct drm_update_draw __user *request;
 947	int err;
 948
 949	if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
 950		return -EFAULT;
 951
 952	request = compat_alloc_user_space(sizeof(*request));
 953	if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) ||
 954	    __put_user(update32.handle, &request->handle) ||
 955	    __put_user(update32.type, &request->type) ||
 956	    __put_user(update32.num, &request->num) ||
 957	    __put_user(update32.data, &request->data))
 958		return -EFAULT;
 959
 960	err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
 961	return err;
 962}
 963#endif
 964
 965struct drm_wait_vblank_request32 {
 966	enum drm_vblank_seq_type type;
 967	unsigned int sequence;
 968	u32 signal;
 969};
 970
 971struct drm_wait_vblank_reply32 {
 972	enum drm_vblank_seq_type type;
 973	unsigned int sequence;
 974	s32 tval_sec;
 975	s32 tval_usec;
 976};
 977
 978typedef union drm_wait_vblank32 {
 979	struct drm_wait_vblank_request32 request;
 980	struct drm_wait_vblank_reply32 reply;
 981} drm_wait_vblank32_t;
 982
 983static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
 984				  unsigned long arg)
 985{
 986	drm_wait_vblank32_t __user *argp = (void __user *)arg;
 987	drm_wait_vblank32_t req32;
 988	union drm_wait_vblank __user *request;
 989	int err;
 990
 991	if (copy_from_user(&req32, argp, sizeof(req32)))
 992		return -EFAULT;
 993
 994	request = compat_alloc_user_space(sizeof(*request));
 995	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 996	    || __put_user(req32.request.type, &request->request.type)
 997	    || __put_user(req32.request.sequence, &request->request.sequence)
 998	    || __put_user(req32.request.signal, &request->request.signal))
 999		return -EFAULT;
1000
1001	err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1002	if (err)
1003		return err;
1004
1005	if (__get_user(req32.reply.type, &request->reply.type)
1006	    || __get_user(req32.reply.sequence, &request->reply.sequence)
1007	    || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1008	    || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1009		return -EFAULT;
1010
1011	if (copy_to_user(argp, &req32, sizeof(req32)))
1012		return -EFAULT;
1013
1014	return 0;
1015}
1016
1017drm_ioctl_compat_t *drm_compat_ioctls[] = {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1018	[DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1019	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1020	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1021	[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1022	[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1023	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1024	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1025	[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1026	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1027	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1028	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1029	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1030	[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1031	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1032	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1033	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1034	[DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1035#if __OS_HAS_AGP
1036	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1037	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1038	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1039	[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1040	[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1041	[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1042#endif
1043	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1044	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1045#if defined(CONFIG_X86) || defined(CONFIG_IA64)
1046	[DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1047#endif
1048	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
 
1049};
1050
1051/**
1052 * Called whenever a 32-bit process running under a 64-bit kernel
1053 * performs an ioctl on /dev/drm.
1054 *
1055 * \param file_priv DRM file private.
1056 * \param cmd command.
1057 * \param arg user argument.
1058 * \return zero on success or negative number on failure.
1059 */
1060long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1061{
1062	unsigned int nr = DRM_IOCTL_NR(cmd);
1063	drm_ioctl_compat_t *fn;
1064	int ret;
1065
1066	/* Assume that ioctls without an explicit compat routine will just
1067	 * work.  This may not always be a good assumption, but it's better
1068	 * than always failing.
1069	 */
1070	if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1071		return drm_ioctl(filp, cmd, arg);
1072
1073	fn = drm_compat_ioctls[nr];
1074
1075	if (fn != NULL)
1076		ret = (*fn) (filp, cmd, arg);
1077	else
1078		ret = drm_ioctl(filp, cmd, arg);
1079
1080	return ret;
1081}
1082
1083EXPORT_SYMBOL(drm_compat_ioctl);