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
  36 #define DRM_IOCTL_VERSION32             DRM_IOWR(0x00, drm_version32_t)
  37 #define DRM_IOCTL_GET_UNIQUE32          DRM_IOWR(0x01, drm_unique32_t)
  38 #define DRM_IOCTL_GET_MAP32             DRM_IOWR(0x04, drm_map32_t)
  39 #define DRM_IOCTL_GET_CLIENT32          DRM_IOWR(0x05, drm_client32_t)
  40 #define DRM_IOCTL_GET_STATS32           DRM_IOR( 0x06, drm_stats32_t)
  41
  42 #define DRM_IOCTL_SET_UNIQUE32          DRM_IOW( 0x10, drm_unique32_t)
  43 #define DRM_IOCTL_ADD_MAP32             DRM_IOWR(0x15, drm_map32_t)
  44 #define DRM_IOCTL_ADD_BUFS32            DRM_IOWR(0x16, drm_buf_desc32_t)
  45 #define DRM_IOCTL_MARK_BUFS32           DRM_IOW( 0x17, drm_buf_desc32_t)
  46 #define DRM_IOCTL_INFO_BUFS32           DRM_IOWR(0x18, drm_buf_info32_t)
  47 #define DRM_IOCTL_MAP_BUFS32            DRM_IOWR(0x19, drm_buf_map32_t)
  48 #define DRM_IOCTL_FREE_BUFS32           DRM_IOW( 0x1a, drm_buf_free32_t)
  49
  50 #define DRM_IOCTL_RM_MAP32              DRM_IOW( 0x1b, drm_map32_t)
  51
  52 #define DRM_IOCTL_SET_SAREA_CTX32       DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
  53 #define DRM_IOCTL_GET_SAREA_CTX32       DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
  54
  55 #define DRM_IOCTL_RES_CTX32             DRM_IOWR(0x26, drm_ctx_res32_t)
  56 #define DRM_IOCTL_DMA32                 DRM_IOWR(0x29, drm_dma32_t)
  57
  58 #define DRM_IOCTL_AGP_ENABLE32          DRM_IOW( 0x32, drm_agp_mode32_t)
  59 #define DRM_IOCTL_AGP_INFO32            DRM_IOR( 0x33, drm_agp_info32_t)
  60 #define DRM_IOCTL_AGP_ALLOC32           DRM_IOWR(0x34, drm_agp_buffer32_t)
  61 #define DRM_IOCTL_AGP_FREE32            DRM_IOW( 0x35, drm_agp_buffer32_t)
  62 #define DRM_IOCTL_AGP_BIND32            DRM_IOW( 0x36, drm_agp_binding32_t)
  63 #define DRM_IOCTL_AGP_UNBIND32          DRM_IOW( 0x37, drm_agp_binding32_t)
  64
  65 #define DRM_IOCTL_SG_ALLOC32            DRM_IOW( 0x38, drm_scatter_gather32_t)
  66 #define DRM_IOCTL_SG_FREE32             DRM_IOW( 0x39, drm_scatter_gather32_t)
  67
  68 #define DRM_IOCTL_UPDATE_DRAW32         DRM_IOW( 0x3f, drm_update_draw32_t)
  69
  70 #define DRM_IOCTL_WAIT_VBLANK32         DRM_IOWR(0x3a, drm_wait_vblank32_t)
  71
  72 #define DRM_IOCTL_MODE_ADDFB232         DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
  73
  74 typedef struct drm_version_32 {
  75         int version_major;        /* Major version */
  76         int version_minor;        /* Minor version */
  77         int version_patchlevel;    /* Patch level */
  78         u32 name_len;             /* Length of name buffer */
  79         u32 name;                 /* Name of driver */
  80         u32 date_len;             /* Length of date buffer */
  81         u32 date;                 /* User-space buffer to hold date */
  82         u32 desc_len;             /* Length of desc buffer */
  83         u32 desc;                 /* User-space buffer to hold desc */
  84 } drm_version32_t;
  85
  86 static int compat_drm_version(struct file *file, unsigned int cmd,
  87                               unsigned long arg)
  88 {
  89         drm_version32_t v32;
  90         struct drm_version __user *version;
  91         int err;
  92
  93         if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
  94                 return -EFAULT;
  95
  96         version = compat_alloc_user_space(sizeof(*version));
  97         if (!version)
  98                 return -EFAULT;
  99         if (__put_user(v32.name_len, &version->name_len)
 100             || __put_user((void __user *)(unsigned long)v32.name,
 101                           &version->name)
 102             || __put_user(v32.date_len, &version->date_len)
 103             || __put_user((void __user *)(unsigned long)v32.date,
 104                           &version->date)
 105             || __put_user(v32.desc_len, &version->desc_len)
 106             || __put_user((void __user *)(unsigned long)v32.desc,
 107                           &version->desc))
 108                 return -EFAULT;
 109
 110         err = drm_ioctl(file,
 111                         DRM_IOCTL_VERSION, (unsigned long)version);
 112         if (err)
 113                 return err;
 114
 115         if (__get_user(v32.version_major, &version->version_major)
 116             || __get_user(v32.version_minor, &version->version_minor)
 117             || __get_user(v32.version_patchlevel, &version->version_patchlevel)
 118             || __get_user(v32.name_len, &version->name_len)
 119             || __get_user(v32.date_len, &version->date_len)
 120             || __get_user(v32.desc_len, &version->desc_len))
 121                 return -EFAULT;
 122
 123         if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
 124                 return -EFAULT;
 125         return 0;
 126 }
 127
 128 typedef struct drm_unique32 {
 129         u32 unique_len; /* Length of unique */
 130         u32 unique;     /* Unique name for driver instantiation */
 131 } drm_unique32_t;
 132
 133 static int compat_drm_getunique(struct file *file, unsigned int cmd,
 134                                 unsigned long arg)
 135 {
 136         drm_unique32_t uq32;
 137         struct drm_unique __user *u;
 138         int err;
 139
 140         if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 141                 return -EFAULT;
 142
 143         u = compat_alloc_user_space(sizeof(*u));
 144         if (!u)
 145                 return -EFAULT;
 146         if (__put_user(uq32.unique_len, &u->unique_len)
 147             || __put_user((void __user *)(unsigned long)uq32.unique,
 148                           &u->unique))
 149                 return -EFAULT;
 150
 151         err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
 152         if (err)
 153                 return err;
 154
 155         if (__get_user(uq32.unique_len, &u->unique_len))
 156                 return -EFAULT;
 157         if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
 158                 return -EFAULT;
 159         return 0;
 160 }
 161
 162 static int compat_drm_setunique(struct file *file, unsigned int cmd,
 163                                 unsigned long arg)
 164 {
 165         drm_unique32_t uq32;
 166         struct drm_unique __user *u;
 167
 168         if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 169                 return -EFAULT;
 170
 171         u = compat_alloc_user_space(sizeof(*u));
 172         if (!u)
 173                 return -EFAULT;
 174         if (__put_user(uq32.unique_len, &u->unique_len)
 175             || __put_user((void __user *)(unsigned long)uq32.unique,
 176                           &u->unique))
 177                 return -EFAULT;
 178
 179         return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
 180 }
 181
 182 typedef struct drm_map32 {
 183         u32 offset;             /* Requested physical address (0 for SAREA) */
 184         u32 size;               /* Requested physical size (bytes) */
 185         enum drm_map_type type; /* Type of memory to map */
 186         enum drm_map_flags flags;       /* Flags */
 187         u32 handle;             /* User-space: "Handle" to pass to mmap() */
 188         int mtrr;               /* MTRR slot used */
 189 } drm_map32_t;
 190
 191 static int compat_drm_getmap(struct file *file, unsigned int cmd,
 192                              unsigned long arg)
 193 {
 194         drm_map32_t __user *argp = (void __user *)arg;
 195         drm_map32_t m32;
 196         struct drm_map __user *map;
 197         int idx, err;
 198         void *handle;
 199
 200         if (get_user(idx, &argp->offset))
 201                 return -EFAULT;
 202
 203         map = compat_alloc_user_space(sizeof(*map));
 204         if (!map)
 205                 return -EFAULT;
 206         if (__put_user(idx, &map->offset))
 207                 return -EFAULT;
 208
 209         err = drm_ioctl(file, 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 (!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, DRM_IOCTL_ADD_MAP, (unsigned long)map);
 250         if (err)
 251                 return err;
 252
 253         if (__get_user(m32.offset, &map->offset)
 254             || __get_user(m32.mtrr, &map->mtrr)
 255             || __get_user(handle, &map->handle))
 256                 return -EFAULT;
 257
 258         m32.handle = (unsigned long)handle;
 259         if (m32.handle != (unsigned long)handle)
 260                 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
 261                                    handle, m32.type, m32.offset);
 262
 263         if (copy_to_user(argp, &m32, sizeof(m32)))
 264                 return -EFAULT;
 265
 266         return 0;
 267 }
 268
 269 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
 270                             unsigned long arg)
 271 {
 272         drm_map32_t __user *argp = (void __user *)arg;
 273         struct drm_map __user *map;
 274         u32 handle;
 275
 276         if (get_user(handle, &argp->handle))
 277                 return -EFAULT;
 278
 279         map = compat_alloc_user_space(sizeof(*map));
 280         if (!map)
 281                 return -EFAULT;
 282         if (__put_user((void *)(unsigned long)handle, &map->handle))
 283                 return -EFAULT;
 284
 285         return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
 286 }
 287
 288 typedef struct drm_client32 {
 289         int idx;        /* Which client desired? */
 290         int auth;       /* Is client authenticated? */
 291         u32 pid;        /* Process ID */
 292         u32 uid;        /* User ID */
 293         u32 magic;      /* Magic */
 294         u32 iocs;       /* Ioctl count */
 295 } drm_client32_t;
 296
 297 static int compat_drm_getclient(struct file *file, unsigned int cmd,
 298                                 unsigned long arg)
 299 {
 300         drm_client32_t c32;
 301         drm_client32_t __user *argp = (void __user *)arg;
 302         struct drm_client __user *client;
 303         int idx, err;
 304
 305         if (get_user(idx, &argp->idx))
 306                 return -EFAULT;
 307
 308         client = compat_alloc_user_space(sizeof(*client));
 309         if (!client)
 310                 return -EFAULT;
 311         if (__put_user(idx, &client->idx))
 312                 return -EFAULT;
 313
 314         err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
 315         if (err)
 316                 return err;
 317
 318         if (__get_user(c32.idx, &client->idx)
 319             || __get_user(c32.auth, &client->auth)
 320             || __get_user(c32.pid, &client->pid)
 321             || __get_user(c32.uid, &client->uid)
 322             || __get_user(c32.magic, &client->magic)
 323             || __get_user(c32.iocs, &client->iocs))
 324                 return -EFAULT;
 325
 326         if (copy_to_user(argp, &c32, sizeof(c32)))
 327                 return -EFAULT;
 328         return 0;
 329 }
 330
 331 typedef struct drm_stats32 {
 332         u32 count;
 333         struct {
 334                 u32 value;
 335                 enum drm_stat_type type;
 336         } data[15];
 337 } drm_stats32_t;
 338
 339 static int compat_drm_getstats(struct file *file, unsigned int cmd,
 340                                unsigned long arg)
 341 {
 342         drm_stats32_t s32;
 343         drm_stats32_t __user *argp = (void __user *)arg;
 344         struct drm_stats __user *stats;
 345         int i, err;
 346
 347         memset(&s32, 0, sizeof(drm_stats32_t));
 348         stats = compat_alloc_user_space(sizeof(*stats));
 349         if (!stats)
 350                 return -EFAULT;
 351
 352         err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
 353         if (err)
 354                 return err;
 355
 356         if (__get_user(s32.count, &stats->count))
 357                 return -EFAULT;
 358         for (i = 0; i < 15; ++i)
 359                 if (__get_user(s32.data[i].value, &stats->data[i].value)
 360                     || __get_user(s32.data[i].type, &stats->data[i].type))
 361                         return -EFAULT;
 362
 363         if (copy_to_user(argp, &s32, sizeof(s32)))
 364                 return -EFAULT;
 365         return 0;
 366 }
 367
 368 typedef struct drm_buf_desc32 {
 369         int count;               /* Number of buffers of this size */
 370         int size;                /* Size in bytes */
 371         int low_mark;            /* Low water mark */
 372         int high_mark;           /* High water mark */
 373         int flags;
 374         u32 agp_start;           /* Start address in the AGP aperture */
 375 } drm_buf_desc32_t;
 376
 377 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
 378                               unsigned long arg)
 379 {
 380         drm_buf_desc32_t __user *argp = (void __user *)arg;
 381         struct drm_buf_desc __user *buf;
 382         int err;
 383         unsigned long agp_start;
 384
 385         buf = compat_alloc_user_space(sizeof(*buf));
 386         if (!buf || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
 387                 return -EFAULT;
 388
 389         if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
 390             || __get_user(agp_start, &argp->agp_start)
 391             || __put_user(agp_start, &buf->agp_start))
 392                 return -EFAULT;
 393
 394         err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
 395         if (err)
 396                 return err;
 397
 398         if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
 399             || __get_user(agp_start, &buf->agp_start)
 400             || __put_user(agp_start, &argp->agp_start))
 401                 return -EFAULT;
 402
 403         return 0;
 404 }
 405
 406 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
 407                                unsigned long arg)
 408 {
 409         drm_buf_desc32_t b32;
 410         drm_buf_desc32_t __user *argp = (void __user *)arg;
 411         struct drm_buf_desc __user *buf;
 412
 413         if (copy_from_user(&b32, argp, sizeof(b32)))
 414                 return -EFAULT;
 415
 416         buf = compat_alloc_user_space(sizeof(*buf));
 417         if (!buf)
 418                 return -EFAULT;
 419
 420         if (__put_user(b32.size, &buf->size)
 421             || __put_user(b32.low_mark, &buf->low_mark)
 422             || __put_user(b32.high_mark, &buf->high_mark))
 423                 return -EFAULT;
 424
 425         return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
 426 }
 427
 428 typedef struct drm_buf_info32 {
 429         int count;              /**< Entries in list */
 430         u32 list;
 431 } drm_buf_info32_t;
 432
 433 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
 434                                unsigned long arg)
 435 {
 436         drm_buf_info32_t req32;
 437         drm_buf_info32_t __user *argp = (void __user *)arg;
 438         drm_buf_desc32_t __user *to;
 439         struct drm_buf_info __user *request;
 440         struct drm_buf_desc __user *list;
 441         size_t nbytes;
 442         int i, err;
 443         int count, actual;
 444
 445         if (copy_from_user(&req32, argp, sizeof(req32)))
 446                 return -EFAULT;
 447
 448         count = req32.count;
 449         to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
 450         if (count < 0)
 451                 count = 0;
 452         if (count > 0
 453             && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
 454                 return -EFAULT;
 455
 456         nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
 457         request = compat_alloc_user_space(nbytes);
 458         if (!request)
 459                 return -EFAULT;
 460         list = (struct drm_buf_desc *) (request + 1);
 461
 462         if (__put_user(count, &request->count)
 463             || __put_user(list, &request->list))
 464                 return -EFAULT;
 465
 466         err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
 467         if (err)
 468                 return err;
 469
 470         if (__get_user(actual, &request->count))
 471                 return -EFAULT;
 472         if (count >= actual)
 473                 for (i = 0; i < actual; ++i)
 474                         if (__copy_in_user(&to[i], &list[i],
 475                                            offsetof(struct drm_buf_desc, flags)))
 476                                 return -EFAULT;
 477
 478         if (__put_user(actual, &argp->count))
 479                 return -EFAULT;
 480
 481         return 0;
 482 }
 483
 484 typedef struct drm_buf_pub32 {
 485         int idx;                /**< Index into the master buffer list */
 486         int total;              /**< Buffer size */
 487         int used;               /**< Amount of buffer in use (for DMA) */
 488         u32 address;            /**< Address of buffer */
 489 } drm_buf_pub32_t;
 490
 491 typedef struct drm_buf_map32 {
 492         int count;              /**< Length of the buffer list */
 493         u32 virtual;            /**< Mmap'd area in user-virtual */
 494         u32 list;               /**< Buffer information */
 495 } drm_buf_map32_t;
 496
 497 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
 498                               unsigned long arg)
 499 {
 500         drm_buf_map32_t __user *argp = (void __user *)arg;
 501         drm_buf_map32_t req32;
 502         drm_buf_pub32_t __user *list32;
 503         struct drm_buf_map __user *request;
 504         struct drm_buf_pub __user *list;
 505         int i, err;
 506         int count, actual;
 507         size_t nbytes;
 508         void __user *addr;
 509
 510         if (copy_from_user(&req32, argp, sizeof(req32)))
 511                 return -EFAULT;
 512         count = req32.count;
 513         list32 = (void __user *)(unsigned long)req32.list;
 514
 515         if (count < 0)
 516                 return -EINVAL;
 517         nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
 518         request = compat_alloc_user_space(nbytes);
 519         if (!request)
 520                 return -EFAULT;
 521         list = (struct drm_buf_pub *) (request + 1);
 522
 523         if (__put_user(count, &request->count)
 524             || __put_user(list, &request->list))
 525                 return -EFAULT;
 526
 527         err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
 528         if (err)
 529                 return err;
 530
 531         if (__get_user(actual, &request->count))
 532                 return -EFAULT;
 533         if (count >= actual)
 534                 for (i = 0; i < actual; ++i)
 535                         if (__copy_in_user(&list32[i], &list[i],
 536                                            offsetof(struct drm_buf_pub, address))
 537                             || __get_user(addr, &list[i].address)
 538                             || __put_user((unsigned long)addr,
 539                                           &list32[i].address))
 540                                 return -EFAULT;
 541
 542         if (__put_user(actual, &argp->count)
 543             || __get_user(addr, &request->virtual)
 544             || __put_user((unsigned long)addr, &argp->virtual))
 545                 return -EFAULT;
 546
 547         return 0;
 548 }
 549
 550 typedef struct drm_buf_free32 {
 551         int count;
 552         u32 list;
 553 } drm_buf_free32_t;
 554
 555 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
 556                                unsigned long arg)
 557 {
 558         drm_buf_free32_t req32;
 559         struct drm_buf_free __user *request;
 560         drm_buf_free32_t __user *argp = (void __user *)arg;
 561
 562         if (copy_from_user(&req32, argp, sizeof(req32)))
 563                 return -EFAULT;
 564
 565         request = compat_alloc_user_space(sizeof(*request));
 566         if (!request)
 567                 return -EFAULT;
 568         if (__put_user(req32.count, &request->count)
 569             || __put_user((int __user *)(unsigned long)req32.list,
 570                           &request->list))
 571                 return -EFAULT;
 572
 573         return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
 574 }
 575
 576 typedef struct drm_ctx_priv_map32 {
 577         unsigned int ctx_id;     /**< Context requesting private mapping */
 578         u32 handle;             /**< Handle of map */
 579 } drm_ctx_priv_map32_t;
 580
 581 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
 582                                   unsigned long arg)
 583 {
 584         drm_ctx_priv_map32_t req32;
 585         struct drm_ctx_priv_map __user *request;
 586         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 587
 588         if (copy_from_user(&req32, argp, sizeof(req32)))
 589                 return -EFAULT;
 590
 591         request = compat_alloc_user_space(sizeof(*request));
 592         if (!request)
 593                 return -EFAULT;
 594         if (__put_user(req32.ctx_id, &request->ctx_id)
 595             || __put_user((void *)(unsigned long)req32.handle,
 596                           &request->handle))
 597                 return -EFAULT;
 598
 599         return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
 600 }
 601
 602 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
 603                                   unsigned long arg)
 604 {
 605         struct drm_ctx_priv_map __user *request;
 606         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 607         int err;
 608         unsigned int ctx_id;
 609         void *handle;
 610
 611         if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 612             || __get_user(ctx_id, &argp->ctx_id))
 613                 return -EFAULT;
 614
 615         request = compat_alloc_user_space(sizeof(*request));
 616         if (!request)
 617                 return -EFAULT;
 618         if (__put_user(ctx_id, &request->ctx_id))
 619                 return -EFAULT;
 620
 621         err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
 622         if (err)
 623                 return err;
 624
 625         if (__get_user(handle, &request->handle)
 626             || __put_user((unsigned long)handle, &argp->handle))
 627                 return -EFAULT;
 628
 629         return 0;
 630 }
 631
 632 typedef struct drm_ctx_res32 {
 633         int count;
 634         u32 contexts;
 635 } drm_ctx_res32_t;
 636
 637 static int compat_drm_resctx(struct file *file, unsigned int cmd,
 638                              unsigned long arg)
 639 {
 640         drm_ctx_res32_t __user *argp = (void __user *)arg;
 641         drm_ctx_res32_t res32;
 642         struct drm_ctx_res __user *res;
 643         int err;
 644
 645         if (copy_from_user(&res32, argp, sizeof(res32)))
 646                 return -EFAULT;
 647
 648         res = compat_alloc_user_space(sizeof(*res));
 649         if (!res)
 650                 return -EFAULT;
 651         if (__put_user(res32.count, &res->count)
 652             || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
 653                           &res->contexts))
 654                 return -EFAULT;
 655
 656         err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
 657         if (err)
 658                 return err;
 659
 660         if (__get_user(res32.count, &res->count)
 661             || __put_user(res32.count, &argp->count))
 662                 return -EFAULT;
 663
 664         return 0;
 665 }
 666
 667 typedef struct drm_dma32 {
 668         int context;              /**< Context handle */
 669         int send_count;           /**< Number of buffers to send */
 670         u32 send_indices;         /**< List of handles to buffers */
 671         u32 send_sizes;           /**< Lengths of data to send */
 672         enum drm_dma_flags flags;                 /**< Flags */
 673         int request_count;        /**< Number of buffers requested */
 674         int request_size;         /**< Desired size for buffers */
 675         u32 request_indices;      /**< Buffer information */
 676         u32 request_sizes;
 677         int granted_count;        /**< Number of buffers granted */
 678 } drm_dma32_t;
 679
 680 static int compat_drm_dma(struct file *file, unsigned int cmd,
 681                           unsigned long arg)
 682 {
 683         drm_dma32_t d32;
 684         drm_dma32_t __user *argp = (void __user *)arg;
 685         struct drm_dma __user *d;
 686         int err;
 687
 688         if (copy_from_user(&d32, argp, sizeof(d32)))
 689                 return -EFAULT;
 690
 691         d = compat_alloc_user_space(sizeof(*d));
 692         if (!d)
 693                 return -EFAULT;
 694
 695         if (__put_user(d32.context, &d->context)
 696             || __put_user(d32.send_count, &d->send_count)
 697             || __put_user((int __user *)(unsigned long)d32.send_indices,
 698                           &d->send_indices)
 699             || __put_user((int __user *)(unsigned long)d32.send_sizes,
 700                           &d->send_sizes)
 701             || __put_user(d32.flags, &d->flags)
 702             || __put_user(d32.request_count, &d->request_count)
 703             || __put_user((int __user *)(unsigned long)d32.request_indices,
 704                           &d->request_indices)
 705             || __put_user((int __user *)(unsigned long)d32.request_sizes,
 706                           &d->request_sizes))
 707                 return -EFAULT;
 708
 709         err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
 710         if (err)
 711                 return err;
 712
 713         if (__get_user(d32.request_size, &d->request_size)
 714             || __get_user(d32.granted_count, &d->granted_count)
 715             || __put_user(d32.request_size, &argp->request_size)
 716             || __put_user(d32.granted_count, &argp->granted_count))
 717                 return -EFAULT;
 718
 719         return 0;
 720 }
 721
 722 #if IS_ENABLED(CONFIG_AGP)
 723 typedef struct drm_agp_mode32 {
 724         u32 mode;       /**< AGP mode */
 725 } drm_agp_mode32_t;
 726
 727 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
 728                                  unsigned long arg)
 729 {
 730         drm_agp_mode32_t __user *argp = (void __user *)arg;
 731         drm_agp_mode32_t m32;
 732         struct drm_agp_mode __user *mode;
 733
 734         if (get_user(m32.mode, &argp->mode))
 735                 return -EFAULT;
 736
 737         mode = compat_alloc_user_space(sizeof(*mode));
 738         if (put_user(m32.mode, &mode->mode))
 739                 return -EFAULT;
 740
 741         return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
 742 }
 743
 744 typedef struct drm_agp_info32 {
 745         int agp_version_major;
 746         int agp_version_minor;
 747         u32 mode;
 748         u32 aperture_base;      /* physical address */
 749         u32 aperture_size;      /* bytes */
 750         u32 memory_allowed;     /* bytes */
 751         u32 memory_used;
 752
 753         /* PCI information */
 754         unsigned short id_vendor;
 755         unsigned short id_device;
 756 } drm_agp_info32_t;
 757
 758 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
 759                                unsigned long arg)
 760 {
 761         drm_agp_info32_t __user *argp = (void __user *)arg;
 762         drm_agp_info32_t i32;
 763         struct drm_agp_info __user *info;
 764         int err;
 765
 766         info = compat_alloc_user_space(sizeof(*info));
 767         if (!info)
 768                 return -EFAULT;
 769
 770         err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
 771         if (err)
 772                 return err;
 773
 774         if (__get_user(i32.agp_version_major, &info->agp_version_major)
 775             || __get_user(i32.agp_version_minor, &info->agp_version_minor)
 776             || __get_user(i32.mode, &info->mode)
 777             || __get_user(i32.aperture_base, &info->aperture_base)
 778             || __get_user(i32.aperture_size, &info->aperture_size)
 779             || __get_user(i32.memory_allowed, &info->memory_allowed)
 780             || __get_user(i32.memory_used, &info->memory_used)
 781             || __get_user(i32.id_vendor, &info->id_vendor)
 782             || __get_user(i32.id_device, &info->id_device))
 783                 return -EFAULT;
 784
 785         if (copy_to_user(argp, &i32, sizeof(i32)))
 786                 return -EFAULT;
 787
 788         return 0;
 789 }
 790
 791 typedef struct drm_agp_buffer32 {
 792         u32 size;       /**< In bytes -- will round to page boundary */
 793         u32 handle;     /**< Used for binding / unbinding */
 794         u32 type;       /**< Type of memory to allocate */
 795         u32 physical;   /**< Physical used by i810 */
 796 } drm_agp_buffer32_t;
 797
 798 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
 799                                 unsigned long arg)
 800 {
 801         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 802         drm_agp_buffer32_t req32;
 803         struct drm_agp_buffer __user *request;
 804         int err;
 805
 806         if (copy_from_user(&req32, argp, sizeof(req32)))
 807                 return -EFAULT;
 808
 809         request = compat_alloc_user_space(sizeof(*request));
 810         if (!request
 811             || __put_user(req32.size, &request->size)
 812             || __put_user(req32.type, &request->type))
 813                 return -EFAULT;
 814
 815         err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
 816         if (err)
 817                 return err;
 818
 819         if (__get_user(req32.handle, &request->handle)
 820             || __get_user(req32.physical, &request->physical)
 821             || copy_to_user(argp, &req32, sizeof(req32))) {
 822                 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
 823                 return -EFAULT;
 824         }
 825
 826         return 0;
 827 }
 828
 829 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
 830                                unsigned long arg)
 831 {
 832         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 833         struct drm_agp_buffer __user *request;
 834         u32 handle;
 835
 836         request = compat_alloc_user_space(sizeof(*request));
 837         if (!request
 838             || get_user(handle, &argp->handle)
 839             || __put_user(handle, &request->handle))
 840                 return -EFAULT;
 841
 842         return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
 843 }
 844
 845 typedef struct drm_agp_binding32 {
 846         u32 handle;     /**< From drm_agp_buffer */
 847         u32 offset;     /**< In bytes -- will round to page boundary */
 848 } drm_agp_binding32_t;
 849
 850 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
 851                                unsigned long arg)
 852 {
 853         drm_agp_binding32_t __user *argp = (void __user *)arg;
 854         drm_agp_binding32_t req32;
 855         struct drm_agp_binding __user *request;
 856
 857         if (copy_from_user(&req32, argp, sizeof(req32)))
 858                 return -EFAULT;
 859
 860         request = compat_alloc_user_space(sizeof(*request));
 861         if (!request
 862             || __put_user(req32.handle, &request->handle)
 863             || __put_user(req32.offset, &request->offset))
 864                 return -EFAULT;
 865
 866         return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
 867 }
 868
 869 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 870                                  unsigned long arg)
 871 {
 872         drm_agp_binding32_t __user *argp = (void __user *)arg;
 873         struct drm_agp_binding __user *request;
 874         u32 handle;
 875
 876         request = compat_alloc_user_space(sizeof(*request));
 877         if (!request
 878             || get_user(handle, &argp->handle)
 879             || __put_user(handle, &request->handle))
 880                 return -EFAULT;
 881
 882         return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
 883 }
 884 #endif /* CONFIG_AGP */
 885
 886 typedef struct drm_scatter_gather32 {
 887         u32 size;       /**< In bytes -- will round to page boundary */
 888         u32 handle;     /**< Used for mapping / unmapping */
 889 } drm_scatter_gather32_t;
 890
 891 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
 892                                unsigned long arg)
 893 {
 894         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 895         struct drm_scatter_gather __user *request;
 896         int err;
 897         unsigned long x;
 898
 899         request = compat_alloc_user_space(sizeof(*request));
 900         if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 901             || __get_user(x, &argp->size)
 902             || __put_user(x, &request->size))
 903                 return -EFAULT;
 904
 905         err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
 906         if (err)
 907                 return err;
 908
 909         /* XXX not sure about the handle conversion here... */
 910         if (__get_user(x, &request->handle)
 911             || __put_user(x >> PAGE_SHIFT, &argp->handle))
 912                 return -EFAULT;
 913
 914         return 0;
 915 }
 916
 917 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 918                               unsigned long arg)
 919 {
 920         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 921         struct drm_scatter_gather __user *request;
 922         unsigned long x;
 923
 924         request = compat_alloc_user_space(sizeof(*request));
 925         if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
 926             || __get_user(x, &argp->handle)
 927             || __put_user(x << PAGE_SHIFT, &request->handle))
 928                 return -EFAULT;
 929
 930         return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
 931 }
 932
 933 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
 934 typedef struct drm_update_draw32 {
 935         drm_drawable_t handle;
 936         unsigned int type;
 937         unsigned int num;
 938         /* 64-bit version has a 32-bit pad here */
 939         u64 data;       /**< Pointer */
 940 } __attribute__((packed)) drm_update_draw32_t;
 941
 942 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
 943                                   unsigned long arg)
 944 {
 945         drm_update_draw32_t update32;
 946         struct drm_update_draw __user *request;
 947         int err;
 948
 949         if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
 950                 return -EFAULT;
 951
 952         request = compat_alloc_user_space(sizeof(*request));
 953         if (!request ||
 954             __put_user(update32.handle, &request->handle) ||
 955             __put_user(update32.type, &request->type) ||
 956             __put_user(update32.num, &request->num) ||
 957             __put_user(update32.data, &request->data))
 958                 return -EFAULT;
 959
 960         err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
 961         return err;
 962 }
 963 #endif
 964
 965 struct drm_wait_vblank_request32 {
 966         enum drm_vblank_seq_type type;
 967         unsigned int sequence;
 968         u32 signal;
 969 };
 970
 971 struct drm_wait_vblank_reply32 {
 972         enum drm_vblank_seq_type type;
 973         unsigned int sequence;
 974         s32 tval_sec;
 975         s32 tval_usec;
 976 };
 977
 978 typedef union drm_wait_vblank32 {
 979         struct drm_wait_vblank_request32 request;
 980         struct drm_wait_vblank_reply32 reply;
 981 } drm_wait_vblank32_t;
 982
 983 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
 984                                   unsigned long arg)
 985 {
 986         drm_wait_vblank32_t __user *argp = (void __user *)arg;
 987         drm_wait_vblank32_t req32;
 988         union drm_wait_vblank __user *request;
 989         int err;
 990
 991         if (copy_from_user(&req32, argp, sizeof(req32)))
 992                 return -EFAULT;
 993
 994         request = compat_alloc_user_space(sizeof(*request));
 995         if (!request
 996             || __put_user(req32.request.type, &request->request.type)
 997             || __put_user(req32.request.sequence, &request->request.sequence)
 998             || __put_user(req32.request.signal, &request->request.signal))
 999                 return -EFAULT;
1000
1001         err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1002         if (err)
1003                 return err;
1004
1005         if (__get_user(req32.reply.type, &request->reply.type)
1006             || __get_user(req32.reply.sequence, &request->reply.sequence)
1007             || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1008             || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1009                 return -EFAULT;
1010
1011         if (copy_to_user(argp, &req32, sizeof(req32)))
1012                 return -EFAULT;
1013
1014         return 0;
1015 }
1016
1017 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
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 #endif
1075
1076 static drm_ioctl_compat_t *drm_compat_ioctls[] = {
1077         [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1078         [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1079         [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1080         [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1081         [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1082         [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1083         [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1084         [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1085         [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1086         [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1087         [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1088         [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1089         [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1090         [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1091         [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1092         [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1093         [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1094 #if IS_ENABLED(CONFIG_AGP)
1095         [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1096         [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1097         [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1098         [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1099         [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1100         [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1101 #endif
1102         [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1103         [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1104 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
1105         [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1106 #endif
1107         [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1108 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
1109         [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2,
1110 #endif
1111 };
1112
1113 /**
1114  * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
1115  * @filp: file this ioctl is called on
1116  * @cmd: ioctl cmd number
1117  * @arg: user argument
1118  *
1119  * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
1120  * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
1121  * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
1122  * botched IOCTL itself, it must handle those by wrapping this function.
1123  *
1124  * Returns:
1125  * Zero on success, negative error code on failure.
1126  */
1127 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1128 {
1129         unsigned int nr = DRM_IOCTL_NR(cmd);
1130         drm_ioctl_compat_t *fn;
1131         int ret;
1132
1133         /* Assume that ioctls without an explicit compat routine will just
1134          * work.  This may not always be a good assumption, but it's better
1135          * than always failing.
1136          */
1137         if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1138                 return drm_ioctl(filp, cmd, arg);
1139
1140         fn = drm_compat_ioctls[nr];
1141
1142         if (fn != NULL)
1143                 ret = (*fn) (filp, cmd, arg);
1144         else
1145                 ret = drm_ioctl(filp, cmd, arg);
1146
1147         return ret;
1148 }
1149 EXPORT_SYMBOL(drm_compat_ioctl);