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 #define DRM_IOCTL_MODE_ADDFB232         DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
  74
  75 typedef 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
  87 static 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
 129 typedef struct drm_unique32 {
 130         u32 unique_len; /**< Length of unique */
 131         u32 unique;     /**< Unique name for driver instantiation */
 132 } drm_unique32_t;
 133
 134 static 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
 163 static 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
 183 typedef 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
 192 static 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
 229 static 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
 271 static 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
 290 typedef 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
 299 static 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
 333 typedef 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
 341 static 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
 369 typedef 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
 378 static 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
 407 static 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
 429 typedef struct drm_buf_info32 {
 430         int count;              /**< Entries in list */
 431         u32 list;
 432 } drm_buf_info32_t;
 433
 434 static 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
 485 typedef 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
 492 typedef 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
 498 static 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
 551 typedef struct drm_buf_free32 {
 552         int count;
 553         u32 list;
 554 } drm_buf_free32_t;
 555
 556 static 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
 577 typedef 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
 582 static 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
 603 static 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
 633 typedef struct drm_ctx_res32 {
 634         int count;
 635         u32 contexts;
 636 } drm_ctx_res32_t;
 637
 638 static 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
 668 typedef 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
 681 static 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 __OS_HAS_AGP
 724 typedef struct drm_agp_mode32 {
 725         u32 mode;       /**< AGP mode */
 726 } drm_agp_mode32_t;
 727
 728 static 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
 745 typedef 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
 759 static 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
 792 typedef 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
 799 static 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
 830 static 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
 846 typedef 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
 851 static 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
 870 static 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                          /* __OS_HAS_AGP */
 886
 887 typedef 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
 892 static 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
 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 (!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)
 935 typedef 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
 943 static 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
 966 struct drm_wait_vblank_request32 {
 967         enum drm_vblank_seq_type type;
 968         unsigned int sequence;
 969         u32 signal;
 970 };
 971
 972 struct 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
 979 typedef union drm_wait_vblank32 {
 980         struct drm_wait_vblank_request32 request;
 981         struct drm_wait_vblank_reply32 reply;
 982 } drm_wait_vblank32_t;
 983
 984 static 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
1018 typedef 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
1030 static 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
1075 static 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 __OS_HAS_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  */
1119 long 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
1142 EXPORT_SYMBOL(drm_compat_ioctl);