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