drivers/gpu/drm/drm_ioc32.c

   1 /*
   2  * \file drm_ioc32.c
   3  *
   4  * 32-bit ioctl compatibility routines for the DRM.
   5  *
   6  * \author Paul Mackerras <paulus@samba.org>
   7  *
   8  * Copyright (C) Paul Mackerras 2005.
   9  * All Rights Reserved.
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice (including the next
  19  * paragraph) shall be included in all copies or substantial portions of the
  20  * Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  25  * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  26  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  27  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  28  * IN THE SOFTWARE.
  29  */
  30 #include <linux/compat.h>
  31 #include <linux/ratelimit.h>
  32 #include <linux/export.h>
  33
  34 #include <drm/drmP.h>
  35 #include "drm_legacy.h"
  36 #include "drm_internal.h"
  37 #include "drm_crtc_internal.h"
  38
  39 #define DRM_IOCTL_VERSION32             DRM_IOWR(0x00, drm_version32_t)
  40 #define DRM_IOCTL_GET_UNIQUE32          DRM_IOWR(0x01, drm_unique32_t)
  41 #define DRM_IOCTL_GET_MAP32             DRM_IOWR(0x04, drm_map32_t)
  42 #define DRM_IOCTL_GET_CLIENT32          DRM_IOWR(0x05, drm_client32_t)
  43 #define DRM_IOCTL_GET_STATS32           DRM_IOR( 0x06, drm_stats32_t)
  44
  45 #define DRM_IOCTL_SET_UNIQUE32          DRM_IOW( 0x10, drm_unique32_t)
  46 #define DRM_IOCTL_ADD_MAP32             DRM_IOWR(0x15, drm_map32_t)
  47 #define DRM_IOCTL_ADD_BUFS32            DRM_IOWR(0x16, drm_buf_desc32_t)
  48 #define DRM_IOCTL_MARK_BUFS32           DRM_IOW( 0x17, drm_buf_desc32_t)
  49 #define DRM_IOCTL_INFO_BUFS32           DRM_IOWR(0x18, drm_buf_info32_t)
  50 #define DRM_IOCTL_MAP_BUFS32            DRM_IOWR(0x19, drm_buf_map32_t)
  51 #define DRM_IOCTL_FREE_BUFS32           DRM_IOW( 0x1a, drm_buf_free32_t)
  52
  53 #define DRM_IOCTL_RM_MAP32              DRM_IOW( 0x1b, drm_map32_t)
  54
  55 #define DRM_IOCTL_SET_SAREA_CTX32       DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
  56 #define DRM_IOCTL_GET_SAREA_CTX32       DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
  57
  58 #define DRM_IOCTL_RES_CTX32             DRM_IOWR(0x26, drm_ctx_res32_t)
  59 #define DRM_IOCTL_DMA32                 DRM_IOWR(0x29, drm_dma32_t)
  60
  61 #define DRM_IOCTL_AGP_ENABLE32          DRM_IOW( 0x32, drm_agp_mode32_t)
  62 #define DRM_IOCTL_AGP_INFO32            DRM_IOR( 0x33, drm_agp_info32_t)
  63 #define DRM_IOCTL_AGP_ALLOC32           DRM_IOWR(0x34, drm_agp_buffer32_t)
  64 #define DRM_IOCTL_AGP_FREE32            DRM_IOW( 0x35, drm_agp_buffer32_t)
  65 #define DRM_IOCTL_AGP_BIND32            DRM_IOW( 0x36, drm_agp_binding32_t)
  66 #define DRM_IOCTL_AGP_UNBIND32          DRM_IOW( 0x37, drm_agp_binding32_t)
  67
  68 #define DRM_IOCTL_SG_ALLOC32            DRM_IOW( 0x38, drm_scatter_gather32_t)
  69 #define DRM_IOCTL_SG_FREE32             DRM_IOW( 0x39, drm_scatter_gather32_t)
  70
  71 #define DRM_IOCTL_UPDATE_DRAW32         DRM_IOW( 0x3f, drm_update_draw32_t)
  72
  73 #define DRM_IOCTL_WAIT_VBLANK32         DRM_IOWR(0x3a, drm_wait_vblank32_t)
  74
  75 #define DRM_IOCTL_MODE_ADDFB232         DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
  76
  77 typedef struct drm_version_32 {
  78         int version_major;        /* Major version */
  79         int version_minor;        /* Minor version */
  80         int version_patchlevel;    /* Patch level */
  81         u32 name_len;             /* Length of name buffer */
  82         u32 name;                 /* Name of driver */
  83         u32 date_len;             /* Length of date buffer */
  84         u32 date;                 /* User-space buffer to hold date */
  85         u32 desc_len;             /* Length of desc buffer */
  86         u32 desc;                 /* User-space buffer to hold desc */
  87 } drm_version32_t;
  88
  89 static int compat_drm_version(struct file *file, unsigned int cmd,
  90                               unsigned long arg)
  91 {
  92         drm_version32_t v32;
  93         struct drm_version v;
  94         int err;
  95
  96         if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
  97                 return -EFAULT;
  98
  99         v = (struct drm_version) {
 100                 .name_len = v32.name_len,
 101                 .name = compat_ptr(v32.name),
 102                 .date_len = v32.date_len,
 103                 .date = compat_ptr(v32.date),
 104                 .desc_len = v32.desc_len,
 105                 .desc = compat_ptr(v32.desc),
 106         };
 107         err = drm_ioctl_kernel(file, drm_version, &v,
 108                         DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
 109         if (err)
 110                 return err;
 111
 112         v32.version_major = v.version_major;
 113         v32.version_minor = v.version_minor;
 114         v32.version_patchlevel = v.version_patchlevel;
 115         v32.name_len = v.name_len;
 116         v32.date_len = v.date_len;
 117         v32.desc_len = v.desc_len;
 118         if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
 119                 return -EFAULT;
 120         return 0;
 121 }
 122
 123 typedef struct drm_unique32 {
 124         u32 unique_len; /* Length of unique */
 125         u32 unique;     /* Unique name for driver instantiation */
 126 } drm_unique32_t;
 127
 128 static int compat_drm_getunique(struct file *file, unsigned int cmd,
 129                                 unsigned long arg)
 130 {
 131         drm_unique32_t uq32;
 132         struct drm_unique uq;
 133         int err;
 134
 135         if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 136                 return -EFAULT;
 137         uq = (struct drm_unique){
 138                 .unique_len = uq32.unique_len,
 139                 .unique = compat_ptr(uq32.unique),
 140         };
 141
 142         err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
 143         if (err)
 144                 return err;
 145
 146         uq32.unique_len = uq.unique_len;
 147         if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
 148                 return -EFAULT;
 149         return 0;
 150 }
 151
 152 static int compat_drm_setunique(struct file *file, unsigned int cmd,
 153                                 unsigned long arg)
 154 {
 155         /* it's dead */
 156         return -EINVAL;
 157 }
 158
 159 typedef struct drm_map32 {
 160         u32 offset;             /* Requested physical address (0 for SAREA) */
 161         u32 size;               /* Requested physical size (bytes) */
 162         enum drm_map_type type; /* Type of memory to map */
 163         enum drm_map_flags flags;       /* Flags */
 164         u32 handle;             /* User-space: "Handle" to pass to mmap() */
 165         int mtrr;               /* MTRR slot used */
 166 } drm_map32_t;
 167
 168 static int compat_drm_getmap(struct file *file, unsigned int cmd,
 169                              unsigned long arg)
 170 {
 171         drm_map32_t __user *argp = (void __user *)arg;
 172         drm_map32_t m32;
 173         struct drm_map map;
 174         int err;
 175
 176         if (copy_from_user(&m32, argp, sizeof(m32)))
 177                 return -EFAULT;
 178
 179         map.offset = m32.offset;
 180         err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
 181         if (err)
 182                 return err;
 183
 184         m32.offset = map.offset;
 185         m32.size = map.size;
 186         m32.type = map.type;
 187         m32.flags = map.flags;
 188         m32.handle = ptr_to_compat(map.handle);
 189         m32.mtrr = map.mtrr;
 190         if (copy_to_user(argp, &m32, sizeof(m32)))
 191                 return -EFAULT;
 192         return 0;
 193
 194 }
 195
 196 static int compat_drm_addmap(struct file *file, unsigned int cmd,
 197                              unsigned long arg)
 198 {
 199         drm_map32_t __user *argp = (void __user *)arg;
 200         drm_map32_t m32;
 201         struct drm_map map;
 202         int err;
 203
 204         if (copy_from_user(&m32, argp, sizeof(m32)))
 205                 return -EFAULT;
 206
 207         map.offset = m32.offset;
 208         map.size = m32.size;
 209         map.type = m32.type;
 210         map.flags = m32.flags;
 211
 212         err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
 213                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 214         if (err)
 215                 return err;
 216
 217         m32.offset = map.offset;
 218         m32.mtrr = map.mtrr;
 219         m32.handle = ptr_to_compat(map.handle);
 220         if (map.handle != compat_ptr(m32.handle))
 221                 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
 222                                    map.handle, m32.type, m32.offset);
 223
 224         if (copy_to_user(argp, &m32, sizeof(m32)))
 225                 return -EFAULT;
 226
 227         return 0;
 228 }
 229
 230 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
 231                             unsigned long arg)
 232 {
 233         drm_map32_t __user *argp = (void __user *)arg;
 234         struct drm_map map;
 235         u32 handle;
 236
 237         if (get_user(handle, &argp->handle))
 238                 return -EFAULT;
 239         map.handle = compat_ptr(handle);
 240         return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
 241 }
 242
 243 typedef struct drm_client32 {
 244         int idx;        /* Which client desired? */
 245         int auth;       /* Is client authenticated? */
 246         u32 pid;        /* Process ID */
 247         u32 uid;        /* User ID */
 248         u32 magic;      /* Magic */
 249         u32 iocs;       /* Ioctl count */
 250 } drm_client32_t;
 251
 252 static int compat_drm_getclient(struct file *file, unsigned int cmd,
 253                                 unsigned long arg)
 254 {
 255         drm_client32_t c32;
 256         drm_client32_t __user *argp = (void __user *)arg;
 257         struct drm_client client;
 258         int err;
 259
 260         if (copy_from_user(&c32, argp, sizeof(c32)))
 261                 return -EFAULT;
 262
 263         client.idx = c32.idx;
 264
 265         err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
 266         if (err)
 267                 return err;
 268
 269         c32.idx = client.idx;
 270         c32.auth = client.auth;
 271         c32.pid = client.pid;
 272         c32.uid = client.uid;
 273         c32.magic = client.magic;
 274         c32.iocs = client.iocs;
 275
 276         if (copy_to_user(argp, &c32, sizeof(c32)))
 277                 return -EFAULT;
 278         return 0;
 279 }
 280
 281 typedef struct drm_stats32 {
 282         u32 count;
 283         struct {
 284                 u32 value;
 285                 enum drm_stat_type type;
 286         } data[15];
 287 } drm_stats32_t;
 288
 289 static int compat_drm_getstats(struct file *file, unsigned int cmd,
 290                                unsigned long arg)
 291 {
 292         drm_stats32_t __user *argp = (void __user *)arg;
 293         int err;
 294
 295         err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
 296         if (err)
 297                 return err;
 298
 299         if (clear_user(argp, sizeof(drm_stats32_t)))
 300                 return -EFAULT;
 301         return 0;
 302 }
 303
 304 typedef struct drm_buf_desc32 {
 305         int count;               /* Number of buffers of this size */
 306         int size;                /* Size in bytes */
 307         int low_mark;            /* Low water mark */
 308         int high_mark;           /* High water mark */
 309         int flags;
 310         u32 agp_start;           /* Start address in the AGP aperture */
 311 } drm_buf_desc32_t;
 312
 313 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
 314                               unsigned long arg)
 315 {
 316         drm_buf_desc32_t __user *argp = (void __user *)arg;
 317         drm_buf_desc32_t desc32;
 318         struct drm_buf_desc desc;
 319         int err;
 320
 321         if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
 322                 return -EFAULT;
 323
 324         desc = (struct drm_buf_desc){
 325                 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
 326                 desc32.flags, desc32.agp_start
 327         };
 328
 329         err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
 330                                    DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 331         if (err)
 332                 return err;
 333
 334         desc32 = (drm_buf_desc32_t){
 335                 desc.count, desc.size, desc.low_mark, desc.high_mark,
 336                 desc.flags, desc.agp_start
 337         };
 338         if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
 339                 return -EFAULT;
 340
 341         return 0;
 342 }
 343
 344 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
 345                                unsigned long arg)
 346 {
 347         drm_buf_desc32_t b32;
 348         drm_buf_desc32_t __user *argp = (void __user *)arg;
 349         struct drm_buf_desc buf;
 350
 351         if (copy_from_user(&b32, argp, sizeof(b32)))
 352                 return -EFAULT;
 353
 354         buf.size = b32.size;
 355         buf.low_mark = b32.low_mark;
 356         buf.high_mark = b32.high_mark;
 357
 358         return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
 359                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 360 }
 361
 362 typedef struct drm_buf_info32 {
 363         int count;              /**< Entries in list */
 364         u32 list;
 365 } drm_buf_info32_t;
 366
 367 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
 368 {
 369         drm_buf_info32_t *request = data;
 370         drm_buf_desc32_t __user *to = compat_ptr(request->list);
 371         drm_buf_desc32_t v = {.count = from->buf_count,
 372                               .size = from->buf_size,
 373                               .low_mark = from->low_mark,
 374                               .high_mark = from->high_mark};
 375         return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
 376 }
 377
 378 static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
 379                         struct drm_file *file_priv)
 380 {
 381         drm_buf_info32_t *request = data;
 382         return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
 383 }
 384
 385 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
 386                                unsigned long arg)
 387 {
 388         drm_buf_info32_t req32;
 389         drm_buf_info32_t __user *argp = (void __user *)arg;
 390         int err;
 391
 392         if (copy_from_user(&req32, argp, sizeof(req32)))
 393                 return -EFAULT;
 394
 395         if (req32.count < 0)
 396                 req32.count = 0;
 397
 398         err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
 399         if (err)
 400                 return err;
 401
 402         if (put_user(req32.count, &argp->count))
 403                 return -EFAULT;
 404
 405         return 0;
 406 }
 407
 408 typedef struct drm_buf_pub32 {
 409         int idx;                /**< Index into the master buffer list */
 410         int total;              /**< Buffer size */
 411         int used;               /**< Amount of buffer in use (for DMA) */
 412         u32 address;            /**< Address of buffer */
 413 } drm_buf_pub32_t;
 414
 415 typedef struct drm_buf_map32 {
 416         int count;              /**< Length of the buffer list */
 417         u32 virtual;            /**< Mmap'd area in user-virtual */
 418         u32 list;               /**< Buffer information */
 419 } drm_buf_map32_t;
 420
 421 static int map_one_buf32(void *data, int idx, unsigned long virtual,
 422                         struct drm_buf *buf)
 423 {
 424         drm_buf_map32_t *request = data;
 425         drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
 426         drm_buf_pub32_t v;
 427
 428         v.idx = buf->idx;
 429         v.total = buf->total;
 430         v.used = 0;
 431         v.address = virtual + buf->offset;
 432         if (copy_to_user(to, &v, sizeof(v)))
 433                 return -EFAULT;
 434         return 0;
 435 }
 436
 437 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
 438                        struct drm_file *file_priv)
 439 {
 440         drm_buf_map32_t *request = data;
 441         void __user *v;
 442         int err = __drm_legacy_mapbufs(dev, data, &request->count,
 443                                     &v, map_one_buf32,
 444                                     file_priv);
 445         request->virtual = ptr_to_compat(v);
 446         return err;
 447 }
 448
 449 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
 450                               unsigned long arg)
 451 {
 452         drm_buf_map32_t __user *argp = (void __user *)arg;
 453         drm_buf_map32_t req32;
 454         int err;
 455
 456         if (copy_from_user(&req32, argp, sizeof(req32)))
 457                 return -EFAULT;
 458         if (req32.count < 0)
 459                 return -EINVAL;
 460
 461         err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
 462         if (err)
 463                 return err;
 464
 465         if (put_user(req32.count, &argp->count)
 466             || put_user(req32.virtual, &argp->virtual))
 467                 return -EFAULT;
 468
 469         return 0;
 470 }
 471
 472 typedef struct drm_buf_free32 {
 473         int count;
 474         u32 list;
 475 } drm_buf_free32_t;
 476
 477 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
 478                                unsigned long arg)
 479 {
 480         drm_buf_free32_t req32;
 481         struct drm_buf_free request;
 482         drm_buf_free32_t __user *argp = (void __user *)arg;
 483
 484         if (copy_from_user(&req32, argp, sizeof(req32)))
 485                 return -EFAULT;
 486
 487         request.count = req32.count;
 488         request.list = compat_ptr(req32.list);
 489         return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
 490 }
 491
 492 typedef struct drm_ctx_priv_map32 {
 493         unsigned int ctx_id;     /**< Context requesting private mapping */
 494         u32 handle;             /**< Handle of map */
 495 } drm_ctx_priv_map32_t;
 496
 497 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
 498                                   unsigned long arg)
 499 {
 500         drm_ctx_priv_map32_t req32;
 501         struct drm_ctx_priv_map request;
 502         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 503
 504         if (copy_from_user(&req32, argp, sizeof(req32)))
 505                 return -EFAULT;
 506
 507         request.ctx_id = req32.ctx_id;
 508         request.handle = compat_ptr(req32.handle);
 509         return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
 510                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 511 }
 512
 513 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
 514                                   unsigned long arg)
 515 {
 516         struct drm_ctx_priv_map req;
 517         drm_ctx_priv_map32_t req32;
 518         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 519         int err;
 520
 521         if (copy_from_user(&req32, argp, sizeof(req32)))
 522                 return -EFAULT;
 523
 524         req.ctx_id = req32.ctx_id;
 525         err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
 526         if (err)
 527                 return err;
 528
 529         req32.handle = ptr_to_compat(req.handle);
 530         if (copy_to_user(argp, &req32, sizeof(req32)))
 531                 return -EFAULT;
 532
 533         return 0;
 534 }
 535
 536 typedef struct drm_ctx_res32 {
 537         int count;
 538         u32 contexts;
 539 } drm_ctx_res32_t;
 540
 541 static int compat_drm_resctx(struct file *file, unsigned int cmd,
 542                              unsigned long arg)
 543 {
 544         drm_ctx_res32_t __user *argp = (void __user *)arg;
 545         drm_ctx_res32_t res32;
 546         struct drm_ctx_res res;
 547         int err;
 548
 549         if (copy_from_user(&res32, argp, sizeof(res32)))
 550                 return -EFAULT;
 551
 552         res.count = res32.count;
 553         res.contexts = compat_ptr(res32.contexts);
 554         err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
 555         if (err)
 556                 return err;
 557
 558         res32.count = res.count;
 559         if (copy_to_user(argp, &res32, sizeof(res32)))
 560                 return -EFAULT;
 561
 562         return 0;
 563 }
 564
 565 typedef struct drm_dma32 {
 566         int context;              /**< Context handle */
 567         int send_count;           /**< Number of buffers to send */
 568         u32 send_indices;         /**< List of handles to buffers */
 569         u32 send_sizes;           /**< Lengths of data to send */
 570         enum drm_dma_flags flags;                 /**< Flags */
 571         int request_count;        /**< Number of buffers requested */
 572         int request_size;         /**< Desired size for buffers */
 573         u32 request_indices;      /**< Buffer information */
 574         u32 request_sizes;
 575         int granted_count;        /**< Number of buffers granted */
 576 } drm_dma32_t;
 577
 578 static int compat_drm_dma(struct file *file, unsigned int cmd,
 579                           unsigned long arg)
 580 {
 581         drm_dma32_t d32;
 582         drm_dma32_t __user *argp = (void __user *)arg;
 583         struct drm_dma d;
 584         int err;
 585
 586         if (copy_from_user(&d32, argp, sizeof(d32)))
 587                 return -EFAULT;
 588
 589         d.context = d32.context;
 590         d.send_count = d32.send_count;
 591         d.send_indices = compat_ptr(d32.send_indices);
 592         d.send_sizes = compat_ptr(d32.send_sizes);
 593         d.flags = d32.flags;
 594         d.request_count = d32.request_count;
 595         d.request_indices = compat_ptr(d32.request_indices);
 596         d.request_sizes = compat_ptr(d32.request_sizes);
 597         err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
 598         if (err)
 599                 return err;
 600
 601         if (put_user(d.request_size, &argp->request_size)
 602             || put_user(d.granted_count, &argp->granted_count))
 603                 return -EFAULT;
 604
 605         return 0;
 606 }
 607
 608 #if IS_ENABLED(CONFIG_AGP)
 609 typedef struct drm_agp_mode32 {
 610         u32 mode;       /**< AGP mode */
 611 } drm_agp_mode32_t;
 612
 613 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
 614                                  unsigned long arg)
 615 {
 616         drm_agp_mode32_t __user *argp = (void __user *)arg;
 617         struct drm_agp_mode mode;
 618
 619         if (get_user(mode.mode, &argp->mode))
 620                 return -EFAULT;
 621
 622         return drm_ioctl_kernel(file,  drm_agp_enable_ioctl, &mode,
 623                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 624 }
 625
 626 typedef struct drm_agp_info32 {
 627         int agp_version_major;
 628         int agp_version_minor;
 629         u32 mode;
 630         u32 aperture_base;      /* physical address */
 631         u32 aperture_size;      /* bytes */
 632         u32 memory_allowed;     /* bytes */
 633         u32 memory_used;
 634
 635         /* PCI information */
 636         unsigned short id_vendor;
 637         unsigned short id_device;
 638 } drm_agp_info32_t;
 639
 640 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
 641                                unsigned long arg)
 642 {
 643         drm_agp_info32_t __user *argp = (void __user *)arg;
 644         drm_agp_info32_t i32;
 645         struct drm_agp_info info;
 646         int err;
 647
 648         err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
 649         if (err)
 650                 return err;
 651
 652         i32.agp_version_major = info.agp_version_major;
 653         i32.agp_version_minor = info.agp_version_minor;
 654         i32.mode = info.mode;
 655         i32.aperture_base = info.aperture_base;
 656         i32.aperture_size = info.aperture_size;
 657         i32.memory_allowed = info.memory_allowed;
 658         i32.memory_used = info.memory_used;
 659         i32.id_vendor = info.id_vendor;
 660         i32.id_device = info.id_device;
 661         if (copy_to_user(argp, &i32, sizeof(i32)))
 662                 return -EFAULT;
 663
 664         return 0;
 665 }
 666
 667 typedef struct drm_agp_buffer32 {
 668         u32 size;       /**< In bytes -- will round to page boundary */
 669         u32 handle;     /**< Used for binding / unbinding */
 670         u32 type;       /**< Type of memory to allocate */
 671         u32 physical;   /**< Physical used by i810 */
 672 } drm_agp_buffer32_t;
 673
 674 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
 675                                 unsigned long arg)
 676 {
 677         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 678         drm_agp_buffer32_t req32;
 679         struct drm_agp_buffer request;
 680         int err;
 681
 682         if (copy_from_user(&req32, argp, sizeof(req32)))
 683                 return -EFAULT;
 684
 685         request.size = req32.size;
 686         request.type = req32.type;
 687         err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
 688                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 689         if (err)
 690                 return err;
 691
 692         req32.handle = request.handle;
 693         req32.physical = request.physical;
 694         if (copy_to_user(argp, &req32, sizeof(req32))) {
 695                 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
 696                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 697                 return -EFAULT;
 698         }
 699
 700         return 0;
 701 }
 702
 703 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
 704                                unsigned long arg)
 705 {
 706         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 707         struct drm_agp_buffer request;
 708
 709         if (get_user(request.handle, &argp->handle))
 710                 return -EFAULT;
 711
 712         return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
 713                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 714 }
 715
 716 typedef struct drm_agp_binding32 {
 717         u32 handle;     /**< From drm_agp_buffer */
 718         u32 offset;     /**< In bytes -- will round to page boundary */
 719 } drm_agp_binding32_t;
 720
 721 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
 722                                unsigned long arg)
 723 {
 724         drm_agp_binding32_t __user *argp = (void __user *)arg;
 725         drm_agp_binding32_t req32;
 726         struct drm_agp_binding request;
 727
 728         if (copy_from_user(&req32, argp, sizeof(req32)))
 729                 return -EFAULT;
 730
 731         request.handle = req32.handle;
 732         request.offset = req32.offset;
 733         return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
 734                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 735 }
 736
 737 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 738                                  unsigned long arg)
 739 {
 740         drm_agp_binding32_t __user *argp = (void __user *)arg;
 741         struct drm_agp_binding request;
 742
 743         if (get_user(request.handle, &argp->handle))
 744                 return -EFAULT;
 745
 746         return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
 747                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 748 }
 749 #endif /* CONFIG_AGP */
 750
 751 typedef struct drm_scatter_gather32 {
 752         u32 size;       /**< In bytes -- will round to page boundary */
 753         u32 handle;     /**< Used for mapping / unmapping */
 754 } drm_scatter_gather32_t;
 755
 756 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
 757                                unsigned long arg)
 758 {
 759         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 760         struct drm_scatter_gather request;
 761         int err;
 762
 763         if (get_user(request.size, &argp->size))
 764                 return -EFAULT;
 765
 766         err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
 767                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 768         if (err)
 769                 return err;
 770
 771         /* XXX not sure about the handle conversion here... */
 772         if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
 773                 return -EFAULT;
 774
 775         return 0;
 776 }
 777
 778 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 779                               unsigned long arg)
 780 {
 781         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 782         struct drm_scatter_gather request;
 783         unsigned long x;
 784
 785         if (get_user(x, &argp->handle))
 786                 return -EFAULT;
 787         request.handle = x << PAGE_SHIFT;
 788         return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
 789                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 790 }
 791
 792 #if defined(CONFIG_X86)
 793 typedef struct drm_update_draw32 {
 794         drm_drawable_t handle;
 795         unsigned int type;
 796         unsigned int num;
 797         /* 64-bit version has a 32-bit pad here */
 798         u64 data;       /**< Pointer */
 799 } __attribute__((packed)) drm_update_draw32_t;
 800
 801 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
 802                                   unsigned long arg)
 803 {
 804         drm_update_draw32_t update32;
 805         if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
 806                 return -EFAULT;
 807
 808         return drm_ioctl_kernel(file, drm_noop, NULL,
 809                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 810 }
 811 #endif
 812
 813 struct drm_wait_vblank_request32 {
 814         enum drm_vblank_seq_type type;
 815         unsigned int sequence;
 816         u32 signal;
 817 };
 818
 819 struct drm_wait_vblank_reply32 {
 820         enum drm_vblank_seq_type type;
 821         unsigned int sequence;
 822         s32 tval_sec;
 823         s32 tval_usec;
 824 };
 825
 826 typedef union drm_wait_vblank32 {
 827         struct drm_wait_vblank_request32 request;
 828         struct drm_wait_vblank_reply32 reply;
 829 } drm_wait_vblank32_t;
 830
 831 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
 832                                   unsigned long arg)
 833 {
 834         drm_wait_vblank32_t __user *argp = (void __user *)arg;
 835         drm_wait_vblank32_t req32;
 836         union drm_wait_vblank req;
 837         int err;
 838
 839         if (copy_from_user(&req32, argp, sizeof(req32)))
 840                 return -EFAULT;
 841
 842         req.request.type = req32.request.type;
 843         req.request.sequence = req32.request.sequence;
 844         req.request.signal = req32.request.signal;
 845         err = drm_ioctl_kernel(file, drm_wait_vblank, &req, DRM_UNLOCKED);
 846         if (err)
 847                 return err;
 848
 849         req32.reply.type = req.reply.type;
 850         req32.reply.sequence = req.reply.sequence;
 851         req32.reply.tval_sec = req.reply.tval_sec;
 852         req32.reply.tval_usec = req.reply.tval_usec;
 853         if (copy_to_user(argp, &req32, sizeof(req32)))
 854                 return -EFAULT;
 855
 856         return 0;
 857 }
 858
 859 #if defined(CONFIG_X86)
 860 typedef struct drm_mode_fb_cmd232 {
 861         u32 fb_id;
 862         u32 width;
 863         u32 height;
 864         u32 pixel_format;
 865         u32 flags;
 866         u32 handles[4];
 867         u32 pitches[4];
 868         u32 offsets[4];
 869         u64 modifier[4];
 870 } __attribute__((packed)) drm_mode_fb_cmd232_t;
 871
 872 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
 873                                   unsigned long arg)
 874 {
 875         struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
 876         struct drm_mode_fb_cmd2 req64;
 877         int err;
 878
 879         if (copy_from_user(&req64, argp,
 880                            offsetof(drm_mode_fb_cmd232_t, modifier)))
 881                 return -EFAULT;
 882
 883         if (copy_from_user(&req64.modifier, &argp->modifier,
 884                            sizeof(req64.modifier)))
 885                 return -EFAULT;
 886
 887         err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
 888                                 DRM_CONTROL_ALLOW|DRM_UNLOCKED);
 889         if (err)
 890                 return err;
 891
 892         if (put_user(req64.fb_id, &argp->fb_id))
 893                 return -EFAULT;
 894
 895         return 0;
 896 }
 897 #endif
 898
 899 static struct {
 900         drm_ioctl_compat_t *fn;
 901         char *name;
 902 } drm_compat_ioctls[] = {
 903 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
 904         DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
 905         DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
 906         DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
 907         DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
 908         DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
 909         DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
 910         DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
 911         DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
 912         DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
 913         DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
 914         DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
 915         DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
 916         DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
 917         DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
 918         DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
 919         DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
 920         DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
 921 #if IS_ENABLED(CONFIG_AGP)
 922         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
 923         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
 924         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
 925         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
 926         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
 927         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
 928 #endif
 929         DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
 930         DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
 931 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
 932         DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
 933 #endif
 934         DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
 935 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
 936         DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
 937 #endif
 938 };
 939
 940 /**
 941  * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
 942  * @filp: file this ioctl is called on
 943  * @cmd: ioctl cmd number
 944  * @arg: user argument
 945  *
 946  * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
 947  * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
 948  * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
 949  * botched IOCTL itself, it must handle those by wrapping this function.
 950  *
 951  * Returns:
 952  * Zero on success, negative error code on failure.
 953  */
 954 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 955 {
 956         unsigned int nr = DRM_IOCTL_NR(cmd);
 957         struct drm_file *file_priv = filp->private_data;
 958         drm_ioctl_compat_t *fn;
 959         int ret;
 960
 961         /* Assume that ioctls without an explicit compat routine will just
 962          * work.  This may not always be a good assumption, but it's better
 963          * than always failing.
 964          */
 965         if (nr >= ARRAY_SIZE(drm_compat_ioctls))
 966                 return drm_ioctl(filp, cmd, arg);
 967
 968         fn = drm_compat_ioctls[nr].fn;
 969         if (!fn)
 970                 return drm_ioctl(filp, cmd, arg);
 971
 972         DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
 973                   task_pid_nr(current),
 974                   (long)old_encode_dev(file_priv->minor->kdev->devt),
 975                   file_priv->authenticated,
 976                   drm_compat_ioctls[nr].name);
 977         ret = (*fn)(filp, cmd, arg);
 978         if (ret)
 979                 DRM_DEBUG("ret = %d\n", ret);
 980         return ret;
 981 }
 982 EXPORT_SYMBOL(drm_compat_ioctl);