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->f_path.dentry->d_inode, 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->f_path.dentry->d_inode, file,
 149                         DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
 150         if (err)
 151                 return err;
 152
 153         if (__get_user(uq32.unique_len, &u->unique_len))
 154                 return -EFAULT;
 155         if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
 156                 return -EFAULT;
 157         return 0;
 158 }
 159
 160 static int compat_drm_setunique(struct file *file, unsigned int cmd,
 161                                 unsigned long arg)
 162 {
 163         drm_unique32_t uq32;
 164         struct drm_unique __user *u;
 165
 166         if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 167                 return -EFAULT;
 168
 169         u = compat_alloc_user_space(sizeof(*u));
 170         if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
 171                 return -EFAULT;
 172         if (__put_user(uq32.unique_len, &u->unique_len)
 173             || __put_user((void __user *)(unsigned long)uq32.unique,
 174                           &u->unique))
 175                 return -EFAULT;
 176
 177         return drm_ioctl(file->f_path.dentry->d_inode, file,
 178                          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->f_path.dentry->d_inode, file,
 209                         DRM_IOCTL_GET_MAP, (unsigned long)map);
 210         if (err)
 211                 return err;
 212
 213         if (__get_user(m32.offset, &map->offset)
 214             || __get_user(m32.size, &map->size)
 215             || __get_user(m32.type, &map->type)
 216             || __get_user(m32.flags, &map->flags)
 217             || __get_user(handle, &map->handle)
 218             || __get_user(m32.mtrr, &map->mtrr))
 219                 return -EFAULT;
 220
 221         m32.handle = (unsigned long)handle;
 222         if (copy_to_user(argp, &m32, sizeof(m32)))
 223                 return -EFAULT;
 224         return 0;
 225
 226 }
 227
 228 static int compat_drm_addmap(struct file *file, unsigned int cmd,
 229                              unsigned long arg)
 230 {
 231         drm_map32_t __user *argp = (void __user *)arg;
 232         drm_map32_t m32;
 233         struct drm_map __user *map;
 234         int err;
 235         void *handle;
 236
 237         if (copy_from_user(&m32, argp, sizeof(m32)))
 238                 return -EFAULT;
 239
 240         map = compat_alloc_user_space(sizeof(*map));
 241         if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
 242                 return -EFAULT;
 243         if (__put_user(m32.offset, &map->offset)
 244             || __put_user(m32.size, &map->size)
 245             || __put_user(m32.type, &map->type)
 246             || __put_user(m32.flags, &map->flags))
 247                 return -EFAULT;
 248
 249         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 250                         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 && printk_ratelimit())
 261                 printk(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 (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
 283                 return -EFAULT;
 284         if (__put_user((void *)(unsigned long)handle, &map->handle))
 285                 return -EFAULT;
 286
 287         return drm_ioctl(file->f_path.dentry->d_inode, file,
 288                          DRM_IOCTL_RM_MAP, (unsigned long)map);
 289 }
 290
 291 typedef struct drm_client32 {
 292         int idx;        /**< Which client desired? */
 293         int auth;       /**< Is client authenticated? */
 294         u32 pid;        /**< Process ID */
 295         u32 uid;        /**< User ID */
 296         u32 magic;      /**< Magic */
 297         u32 iocs;       /**< Ioctl count */
 298 } drm_client32_t;
 299
 300 static int compat_drm_getclient(struct file *file, unsigned int cmd,
 301                                 unsigned long arg)
 302 {
 303         drm_client32_t c32;
 304         drm_client32_t __user *argp = (void __user *)arg;
 305         struct drm_client __user *client;
 306         int idx, err;
 307
 308         if (get_user(idx, &argp->idx))
 309                 return -EFAULT;
 310
 311         client = compat_alloc_user_space(sizeof(*client));
 312         if (!access_ok(VERIFY_WRITE, client, sizeof(*client)))
 313                 return -EFAULT;
 314         if (__put_user(idx, &client->idx))
 315                 return -EFAULT;
 316
 317         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 318                         DRM_IOCTL_GET_CLIENT, (unsigned long)client);
 319         if (err)
 320                 return err;
 321
 322         if (__get_user(c32.auth, &client->auth)
 323             || __get_user(c32.pid, &client->pid)
 324             || __get_user(c32.uid, &client->uid)
 325             || __get_user(c32.magic, &client->magic)
 326             || __get_user(c32.iocs, &client->iocs))
 327                 return -EFAULT;
 328
 329         if (copy_to_user(argp, &c32, sizeof(c32)))
 330                 return -EFAULT;
 331         return 0;
 332 }
 333
 334 typedef struct drm_stats32 {
 335         u32 count;
 336         struct {
 337                 u32 value;
 338                 enum drm_stat_type type;
 339         } data[15];
 340 } drm_stats32_t;
 341
 342 static int compat_drm_getstats(struct file *file, unsigned int cmd,
 343                                unsigned long arg)
 344 {
 345         drm_stats32_t s32;
 346         drm_stats32_t __user *argp = (void __user *)arg;
 347         struct drm_stats __user *stats;
 348         int i, err;
 349
 350         stats = compat_alloc_user_space(sizeof(*stats));
 351         if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats)))
 352                 return -EFAULT;
 353
 354         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 355                         DRM_IOCTL_GET_STATS, (unsigned long)stats);
 356         if (err)
 357                 return err;
 358
 359         if (__get_user(s32.count, &stats->count))
 360                 return -EFAULT;
 361         for (i = 0; i < 15; ++i)
 362                 if (__get_user(s32.data[i].value, &stats->data[i].value)
 363                     || __get_user(s32.data[i].type, &stats->data[i].type))
 364                         return -EFAULT;
 365
 366         if (copy_to_user(argp, &s32, sizeof(s32)))
 367                 return -EFAULT;
 368         return 0;
 369 }
 370
 371 typedef struct drm_buf_desc32 {
 372         int count;               /**< Number of buffers of this size */
 373         int size;                /**< Size in bytes */
 374         int low_mark;            /**< Low water mark */
 375         int high_mark;           /**< High water mark */
 376         int flags;
 377         u32 agp_start;           /**< Start address in the AGP aperture */
 378 } drm_buf_desc32_t;
 379
 380 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
 381                               unsigned long arg)
 382 {
 383         drm_buf_desc32_t __user *argp = (void __user *)arg;
 384         struct drm_buf_desc __user *buf;
 385         int err;
 386         unsigned long agp_start;
 387
 388         buf = compat_alloc_user_space(sizeof(*buf));
 389         if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf))
 390             || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
 391                 return -EFAULT;
 392
 393         if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
 394             || __get_user(agp_start, &argp->agp_start)
 395             || __put_user(agp_start, &buf->agp_start))
 396                 return -EFAULT;
 397
 398         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 399                         DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
 400         if (err)
 401                 return err;
 402
 403         if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
 404             || __get_user(agp_start, &buf->agp_start)
 405             || __put_user(agp_start, &argp->agp_start))
 406                 return -EFAULT;
 407
 408         return 0;
 409 }
 410
 411 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
 412                                unsigned long arg)
 413 {
 414         drm_buf_desc32_t b32;
 415         drm_buf_desc32_t __user *argp = (void __user *)arg;
 416         struct drm_buf_desc __user *buf;
 417
 418         if (copy_from_user(&b32, argp, sizeof(b32)))
 419                 return -EFAULT;
 420
 421         buf = compat_alloc_user_space(sizeof(*buf));
 422         if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf)))
 423                 return -EFAULT;
 424
 425         if (__put_user(b32.size, &buf->size)
 426             || __put_user(b32.low_mark, &buf->low_mark)
 427             || __put_user(b32.high_mark, &buf->high_mark))
 428                 return -EFAULT;
 429
 430         return drm_ioctl(file->f_path.dentry->d_inode, file,
 431                          DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
 432 }
 433
 434 typedef struct drm_buf_info32 {
 435         int count;              /**< Entries in list */
 436         u32 list;
 437 } drm_buf_info32_t;
 438
 439 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
 440                                unsigned long arg)
 441 {
 442         drm_buf_info32_t req32;
 443         drm_buf_info32_t __user *argp = (void __user *)arg;
 444         drm_buf_desc32_t __user *to;
 445         struct drm_buf_info __user *request;
 446         struct drm_buf_desc __user *list;
 447         size_t nbytes;
 448         int i, err;
 449         int count, actual;
 450
 451         if (copy_from_user(&req32, argp, sizeof(req32)))
 452                 return -EFAULT;
 453
 454         count = req32.count;
 455         to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
 456         if (count < 0)
 457                 count = 0;
 458         if (count > 0
 459             && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
 460                 return -EFAULT;
 461
 462         nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
 463         request = compat_alloc_user_space(nbytes);
 464         if (!access_ok(VERIFY_WRITE, request, nbytes))
 465                 return -EFAULT;
 466         list = (struct drm_buf_desc *) (request + 1);
 467
 468         if (__put_user(count, &request->count)
 469             || __put_user(list, &request->list))
 470                 return -EFAULT;
 471
 472         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 473                         DRM_IOCTL_INFO_BUFS, (unsigned long)request);
 474         if (err)
 475                 return err;
 476
 477         if (__get_user(actual, &request->count))
 478                 return -EFAULT;
 479         if (count >= actual)
 480                 for (i = 0; i < actual; ++i)
 481                         if (__copy_in_user(&to[i], &list[i],
 482                                            offsetof(struct drm_buf_desc, flags)))
 483                                 return -EFAULT;
 484
 485         if (__put_user(actual, &argp->count))
 486                 return -EFAULT;
 487
 488         return 0;
 489 }
 490
 491 typedef struct drm_buf_pub32 {
 492         int idx;                /**< Index into the master buffer list */
 493         int total;              /**< Buffer size */
 494         int used;               /**< Amount of buffer in use (for DMA) */
 495         u32 address;            /**< Address of buffer */
 496 } drm_buf_pub32_t;
 497
 498 typedef struct drm_buf_map32 {
 499         int count;              /**< Length of the buffer list */
 500         u32 virtual;            /**< Mmap'd area in user-virtual */
 501         u32 list;               /**< Buffer information */
 502 } drm_buf_map32_t;
 503
 504 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
 505                               unsigned long arg)
 506 {
 507         drm_buf_map32_t __user *argp = (void __user *)arg;
 508         drm_buf_map32_t req32;
 509         drm_buf_pub32_t __user *list32;
 510         struct drm_buf_map __user *request;
 511         struct drm_buf_pub __user *list;
 512         int i, err;
 513         int count, actual;
 514         size_t nbytes;
 515         void __user *addr;
 516
 517         if (copy_from_user(&req32, argp, sizeof(req32)))
 518                 return -EFAULT;
 519         count = req32.count;
 520         list32 = (void __user *)(unsigned long)req32.list;
 521
 522         if (count < 0)
 523                 return -EINVAL;
 524         nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
 525         request = compat_alloc_user_space(nbytes);
 526         if (!access_ok(VERIFY_WRITE, request, nbytes))
 527                 return -EFAULT;
 528         list = (struct drm_buf_pub *) (request + 1);
 529
 530         if (__put_user(count, &request->count)
 531             || __put_user(list, &request->list))
 532                 return -EFAULT;
 533
 534         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 535                         DRM_IOCTL_MAP_BUFS, (unsigned long)request);
 536         if (err)
 537                 return err;
 538
 539         if (__get_user(actual, &request->count))
 540                 return -EFAULT;
 541         if (count >= actual)
 542                 for (i = 0; i < actual; ++i)
 543                         if (__copy_in_user(&list32[i], &list[i],
 544                                            offsetof(struct drm_buf_pub, address))
 545                             || __get_user(addr, &list[i].address)
 546                             || __put_user((unsigned long)addr,
 547                                           &list32[i].address))
 548                                 return -EFAULT;
 549
 550         if (__put_user(actual, &argp->count)
 551             || __get_user(addr, &request->virtual)
 552             || __put_user((unsigned long)addr, &argp->virtual))
 553                 return -EFAULT;
 554
 555         return 0;
 556 }
 557
 558 typedef struct drm_buf_free32 {
 559         int count;
 560         u32 list;
 561 } drm_buf_free32_t;
 562
 563 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
 564                                unsigned long arg)
 565 {
 566         drm_buf_free32_t req32;
 567         struct drm_buf_free __user *request;
 568         drm_buf_free32_t __user *argp = (void __user *)arg;
 569
 570         if (copy_from_user(&req32, argp, sizeof(req32)))
 571                 return -EFAULT;
 572
 573         request = compat_alloc_user_space(sizeof(*request));
 574         if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
 575                 return -EFAULT;
 576         if (__put_user(req32.count, &request->count)
 577             || __put_user((int __user *)(unsigned long)req32.list,
 578                           &request->list))
 579                 return -EFAULT;
 580
 581         return drm_ioctl(file->f_path.dentry->d_inode, file,
 582                          DRM_IOCTL_FREE_BUFS, (unsigned long)request);
 583 }
 584
 585 typedef struct drm_ctx_priv_map32 {
 586         unsigned int ctx_id;     /**< Context requesting private mapping */
 587         u32 handle;             /**< Handle of map */
 588 } drm_ctx_priv_map32_t;
 589
 590 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
 591                                   unsigned long arg)
 592 {
 593         drm_ctx_priv_map32_t req32;
 594         struct drm_ctx_priv_map __user *request;
 595         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 596
 597         if (copy_from_user(&req32, argp, sizeof(req32)))
 598                 return -EFAULT;
 599
 600         request = compat_alloc_user_space(sizeof(*request));
 601         if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
 602                 return -EFAULT;
 603         if (__put_user(req32.ctx_id, &request->ctx_id)
 604             || __put_user((void *)(unsigned long)req32.handle,
 605                           &request->handle))
 606                 return -EFAULT;
 607
 608         return drm_ioctl(file->f_path.dentry->d_inode, file,
 609                          DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
 610 }
 611
 612 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
 613                                   unsigned long arg)
 614 {
 615         struct drm_ctx_priv_map __user *request;
 616         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 617         int err;
 618         unsigned int ctx_id;
 619         void *handle;
 620
 621         if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 622             || __get_user(ctx_id, &argp->ctx_id))
 623                 return -EFAULT;
 624
 625         request = compat_alloc_user_space(sizeof(*request));
 626         if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
 627                 return -EFAULT;
 628         if (__put_user(ctx_id, &request->ctx_id))
 629                 return -EFAULT;
 630
 631         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 632                         DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
 633         if (err)
 634                 return err;
 635
 636         if (__get_user(handle, &request->handle)
 637             || __put_user((unsigned long)handle, &argp->handle))
 638                 return -EFAULT;
 639
 640         return 0;
 641 }
 642
 643 typedef struct drm_ctx_res32 {
 644         int count;
 645         u32 contexts;
 646 } drm_ctx_res32_t;
 647
 648 static int compat_drm_resctx(struct file *file, unsigned int cmd,
 649                              unsigned long arg)
 650 {
 651         drm_ctx_res32_t __user *argp = (void __user *)arg;
 652         drm_ctx_res32_t res32;
 653         struct drm_ctx_res __user *res;
 654         int err;
 655
 656         if (copy_from_user(&res32, argp, sizeof(res32)))
 657                 return -EFAULT;
 658
 659         res = compat_alloc_user_space(sizeof(*res));
 660         if (!access_ok(VERIFY_WRITE, res, sizeof(*res)))
 661                 return -EFAULT;
 662         if (__put_user(res32.count, &res->count)
 663             || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
 664                           &res->contexts))
 665                 return -EFAULT;
 666
 667         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 668                         DRM_IOCTL_RES_CTX, (unsigned long)res);
 669         if (err)
 670                 return err;
 671
 672         if (__get_user(res32.count, &res->count)
 673             || __put_user(res32.count, &argp->count))
 674                 return -EFAULT;
 675
 676         return 0;
 677 }
 678
 679 typedef struct drm_dma32 {
 680         int context;              /**< Context handle */
 681         int send_count;           /**< Number of buffers to send */
 682         u32 send_indices;         /**< List of handles to buffers */
 683         u32 send_sizes;           /**< Lengths of data to send */
 684         enum drm_dma_flags flags;                 /**< Flags */
 685         int request_count;        /**< Number of buffers requested */
 686         int request_size;         /**< Desired size for buffers */
 687         u32 request_indices;      /**< Buffer information */
 688         u32 request_sizes;
 689         int granted_count;        /**< Number of buffers granted */
 690 } drm_dma32_t;
 691
 692 static int compat_drm_dma(struct file *file, unsigned int cmd,
 693                           unsigned long arg)
 694 {
 695         drm_dma32_t d32;
 696         drm_dma32_t __user *argp = (void __user *)arg;
 697         struct drm_dma __user *d;
 698         int err;
 699
 700         if (copy_from_user(&d32, argp, sizeof(d32)))
 701                 return -EFAULT;
 702
 703         d = compat_alloc_user_space(sizeof(*d));
 704         if (!access_ok(VERIFY_WRITE, d, sizeof(*d)))
 705                 return -EFAULT;
 706
 707         if (__put_user(d32.context, &d->context)
 708             || __put_user(d32.send_count, &d->send_count)
 709             || __put_user((int __user *)(unsigned long)d32.send_indices,
 710                           &d->send_indices)
 711             || __put_user((int __user *)(unsigned long)d32.send_sizes,
 712                           &d->send_sizes)
 713             || __put_user(d32.flags, &d->flags)
 714             || __put_user(d32.request_count, &d->request_count)
 715             || __put_user((int __user *)(unsigned long)d32.request_indices,
 716                           &d->request_indices)
 717             || __put_user((int __user *)(unsigned long)d32.request_sizes,
 718                           &d->request_sizes))
 719                 return -EFAULT;
 720
 721         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 722                         DRM_IOCTL_DMA, (unsigned long)d);
 723         if (err)
 724                 return err;
 725
 726         if (__get_user(d32.request_size, &d->request_size)
 727             || __get_user(d32.granted_count, &d->granted_count)
 728             || __put_user(d32.request_size, &argp->request_size)
 729             || __put_user(d32.granted_count, &argp->granted_count))
 730                 return -EFAULT;
 731
 732         return 0;
 733 }
 734
 735 #if __OS_HAS_AGP
 736 typedef struct drm_agp_mode32 {
 737         u32 mode;       /**< AGP mode */
 738 } drm_agp_mode32_t;
 739
 740 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
 741                                  unsigned long arg)
 742 {
 743         drm_agp_mode32_t __user *argp = (void __user *)arg;
 744         drm_agp_mode32_t m32;
 745         struct drm_agp_mode __user *mode;
 746
 747         if (get_user(m32.mode, &argp->mode))
 748                 return -EFAULT;
 749
 750         mode = compat_alloc_user_space(sizeof(*mode));
 751         if (put_user(m32.mode, &mode->mode))
 752                 return -EFAULT;
 753
 754         return drm_ioctl(file->f_path.dentry->d_inode, file,
 755                          DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
 756 }
 757
 758 typedef struct drm_agp_info32 {
 759         int agp_version_major;
 760         int agp_version_minor;
 761         u32 mode;
 762         u32 aperture_base;      /* physical address */
 763         u32 aperture_size;      /* bytes */
 764         u32 memory_allowed;     /* bytes */
 765         u32 memory_used;
 766
 767         /* PCI information */
 768         unsigned short id_vendor;
 769         unsigned short id_device;
 770 } drm_agp_info32_t;
 771
 772 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
 773                                unsigned long arg)
 774 {
 775         drm_agp_info32_t __user *argp = (void __user *)arg;
 776         drm_agp_info32_t i32;
 777         struct drm_agp_info __user *info;
 778         int err;
 779
 780         info = compat_alloc_user_space(sizeof(*info));
 781         if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
 782                 return -EFAULT;
 783
 784         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 785                         DRM_IOCTL_AGP_INFO, (unsigned long)info);
 786         if (err)
 787                 return err;
 788
 789         if (__get_user(i32.agp_version_major, &info->agp_version_major)
 790             || __get_user(i32.agp_version_minor, &info->agp_version_minor)
 791             || __get_user(i32.mode, &info->mode)
 792             || __get_user(i32.aperture_base, &info->aperture_base)
 793             || __get_user(i32.aperture_size, &info->aperture_size)
 794             || __get_user(i32.memory_allowed, &info->memory_allowed)
 795             || __get_user(i32.memory_used, &info->memory_used)
 796             || __get_user(i32.id_vendor, &info->id_vendor)
 797             || __get_user(i32.id_device, &info->id_device))
 798                 return -EFAULT;
 799
 800         if (copy_to_user(argp, &i32, sizeof(i32)))
 801                 return -EFAULT;
 802
 803         return 0;
 804 }
 805
 806 typedef struct drm_agp_buffer32 {
 807         u32 size;       /**< In bytes -- will round to page boundary */
 808         u32 handle;     /**< Used for binding / unbinding */
 809         u32 type;       /**< Type of memory to allocate */
 810         u32 physical;   /**< Physical used by i810 */
 811 } drm_agp_buffer32_t;
 812
 813 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
 814                                 unsigned long arg)
 815 {
 816         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 817         drm_agp_buffer32_t req32;
 818         struct drm_agp_buffer __user *request;
 819         int err;
 820
 821         if (copy_from_user(&req32, argp, sizeof(req32)))
 822                 return -EFAULT;
 823
 824         request = compat_alloc_user_space(sizeof(*request));
 825         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 826             || __put_user(req32.size, &request->size)
 827             || __put_user(req32.type, &request->type))
 828                 return -EFAULT;
 829
 830         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 831                         DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
 832         if (err)
 833                 return err;
 834
 835         if (__get_user(req32.handle, &request->handle)
 836             || __get_user(req32.physical, &request->physical)
 837             || copy_to_user(argp, &req32, sizeof(req32))) {
 838                 drm_ioctl(file->f_path.dentry->d_inode, file,
 839                           DRM_IOCTL_AGP_FREE, (unsigned long)request);
 840                 return -EFAULT;
 841         }
 842
 843         return 0;
 844 }
 845
 846 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
 847                                unsigned long arg)
 848 {
 849         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 850         struct drm_agp_buffer __user *request;
 851         u32 handle;
 852
 853         request = compat_alloc_user_space(sizeof(*request));
 854         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 855             || get_user(handle, &argp->handle)
 856             || __put_user(handle, &request->handle))
 857                 return -EFAULT;
 858
 859         return drm_ioctl(file->f_path.dentry->d_inode, file,
 860                          DRM_IOCTL_AGP_FREE, (unsigned long)request);
 861 }
 862
 863 typedef struct drm_agp_binding32 {
 864         u32 handle;     /**< From drm_agp_buffer */
 865         u32 offset;     /**< In bytes -- will round to page boundary */
 866 } drm_agp_binding32_t;
 867
 868 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
 869                                unsigned long arg)
 870 {
 871         drm_agp_binding32_t __user *argp = (void __user *)arg;
 872         drm_agp_binding32_t req32;
 873         struct drm_agp_binding __user *request;
 874
 875         if (copy_from_user(&req32, argp, sizeof(req32)))
 876                 return -EFAULT;
 877
 878         request = compat_alloc_user_space(sizeof(*request));
 879         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 880             || __put_user(req32.handle, &request->handle)
 881             || __put_user(req32.offset, &request->offset))
 882                 return -EFAULT;
 883
 884         return drm_ioctl(file->f_path.dentry->d_inode, file,
 885                          DRM_IOCTL_AGP_BIND, (unsigned long)request);
 886 }
 887
 888 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 889                                  unsigned long arg)
 890 {
 891         drm_agp_binding32_t __user *argp = (void __user *)arg;
 892         struct drm_agp_binding __user *request;
 893         u32 handle;
 894
 895         request = compat_alloc_user_space(sizeof(*request));
 896         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 897             || get_user(handle, &argp->handle)
 898             || __put_user(handle, &request->handle))
 899                 return -EFAULT;
 900
 901         return drm_ioctl(file->f_path.dentry->d_inode, file,
 902                          DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
 903 }
 904 #endif                          /* __OS_HAS_AGP */
 905
 906 typedef struct drm_scatter_gather32 {
 907         u32 size;       /**< In bytes -- will round to page boundary */
 908         u32 handle;     /**< Used for mapping / unmapping */
 909 } drm_scatter_gather32_t;
 910
 911 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
 912                                unsigned long arg)
 913 {
 914         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 915         struct drm_scatter_gather __user *request;
 916         int err;
 917         unsigned long x;
 918
 919         request = compat_alloc_user_space(sizeof(*request));
 920         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 921             || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 922             || __get_user(x, &argp->size)
 923             || __put_user(x, &request->size))
 924                 return -EFAULT;
 925
 926         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 927                         DRM_IOCTL_SG_ALLOC, (unsigned long)request);
 928         if (err)
 929                 return err;
 930
 931         /* XXX not sure about the handle conversion here... */
 932         if (__get_user(x, &request->handle)
 933             || __put_user(x >> PAGE_SHIFT, &argp->handle))
 934                 return -EFAULT;
 935
 936         return 0;
 937 }
 938
 939 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 940                               unsigned long arg)
 941 {
 942         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 943         struct drm_scatter_gather __user *request;
 944         unsigned long x;
 945
 946         request = compat_alloc_user_space(sizeof(*request));
 947         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
 948             || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 949             || __get_user(x, &argp->handle)
 950             || __put_user(x << PAGE_SHIFT, &request->handle))
 951                 return -EFAULT;
 952
 953         return drm_ioctl(file->f_path.dentry->d_inode, file,
 954                          DRM_IOCTL_SG_FREE, (unsigned long)request);
 955 }
 956
 957 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
 958 typedef struct drm_update_draw32 {
 959         drm_drawable_t handle;
 960         unsigned int type;
 961         unsigned int num;
 962         /* 64-bit version has a 32-bit pad here */
 963         u64 data;       /**< Pointer */
 964 } __attribute__((packed)) drm_update_draw32_t;
 965
 966 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
 967                                   unsigned long arg)
 968 {
 969         drm_update_draw32_t update32;
 970         struct drm_update_draw __user *request;
 971         int err;
 972
 973         if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
 974                 return -EFAULT;
 975
 976         request = compat_alloc_user_space(sizeof(*request));
 977         if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) ||
 978             __put_user(update32.handle, &request->handle) ||
 979             __put_user(update32.type, &request->type) ||
 980             __put_user(update32.num, &request->num) ||
 981             __put_user(update32.data, &request->data))
 982                 return -EFAULT;
 983
 984         err = drm_ioctl(file->f_path.dentry->d_inode, file,
 985                         DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
 986         return err;
 987 }
 988 #endif
 989
 990 struct drm_wait_vblank_request32 {
 991         enum drm_vblank_seq_type type;
 992         unsigned int sequence;
 993         u32 signal;
 994 };
 995
 996 struct drm_wait_vblank_reply32 {
 997         enum drm_vblank_seq_type type;
 998         unsigned int sequence;
 999         s32 tval_sec;
1000         s32 tval_usec;
1001 };
1002
1003 typedef union drm_wait_vblank32 {
1004         struct drm_wait_vblank_request32 request;
1005         struct drm_wait_vblank_reply32 reply;
1006 } drm_wait_vblank32_t;
1007
1008 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
1009                                   unsigned long arg)
1010 {
1011         drm_wait_vblank32_t __user *argp = (void __user *)arg;
1012         drm_wait_vblank32_t req32;
1013         union drm_wait_vblank __user *request;
1014         int err;
1015
1016         if (copy_from_user(&req32, argp, sizeof(req32)))
1017                 return -EFAULT;
1018
1019         request = compat_alloc_user_space(sizeof(*request));
1020         if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
1021             || __put_user(req32.request.type, &request->request.type)
1022             || __put_user(req32.request.sequence, &request->request.sequence)
1023             || __put_user(req32.request.signal, &request->request.signal))
1024                 return -EFAULT;
1025
1026         err = drm_ioctl(file->f_path.dentry->d_inode, file,
1027                         DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1028         if (err)
1029                 return err;
1030
1031         if (__get_user(req32.reply.type, &request->reply.type)
1032             || __get_user(req32.reply.sequence, &request->reply.sequence)
1033             || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1034             || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1035                 return -EFAULT;
1036
1037         if (copy_to_user(argp, &req32, sizeof(req32)))
1038                 return -EFAULT;
1039
1040         return 0;
1041 }
1042
1043 drm_ioctl_compat_t *drm_compat_ioctls[] = {
1044         [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1045         [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1046         [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1047         [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1048         [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1049         [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1050         [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1051         [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1052         [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1053         [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1054         [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1055         [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1056         [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1057         [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1058         [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1059         [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1060         [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1061 #if __OS_HAS_AGP
1062         [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1063         [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1064         [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1065         [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1066         [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1067         [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1068 #endif
1069         [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1070         [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1071 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
1072         [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1073 #endif
1074         [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1075 };
1076
1077 /**
1078  * Called whenever a 32-bit process running under a 64-bit kernel
1079  * performs an ioctl on /dev/drm.
1080  *
1081  * \param file_priv DRM file private.
1082  * \param cmd command.
1083  * \param arg user argument.
1084  * \return zero on success or negative number on failure.
1085  */
1086 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1087 {
1088         unsigned int nr = DRM_IOCTL_NR(cmd);
1089         drm_ioctl_compat_t *fn;
1090         int ret;
1091
1092         /* Assume that ioctls without an explicit compat routine will just
1093          * work.  This may not always be a good assumption, but it's better
1094          * than always failing.
1095          */
1096         if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1097                 return drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
1098
1099         fn = drm_compat_ioctls[nr];
1100
1101         lock_kernel();          /* XXX for now */
1102         if (fn != NULL)
1103                 ret = (*fn) (filp, cmd, arg);
1104         else
1105                 ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
1106         unlock_kernel();
1107
1108         return ret;
1109 }
1110
1111 EXPORT_SYMBOL(drm_compat_ioctl);