drivers/gpu/drm/drm_ioc32.c

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