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/drm_agpsupport.h>
  35 #include <drm/drm_file.h>
  36 #include <drm/drm_print.h>
  37
  38 #include "drm_crtc_internal.h"
  39 #include "drm_internal.h"
  40 #include "drm_legacy.h"
  41
  42 #define DRM_IOCTL_VERSION32             DRM_IOWR(0x00, drm_version32_t)
  43 #define DRM_IOCTL_GET_UNIQUE32          DRM_IOWR(0x01, drm_unique32_t)
  44 #define DRM_IOCTL_GET_MAP32             DRM_IOWR(0x04, drm_map32_t)
  45 #define DRM_IOCTL_GET_CLIENT32          DRM_IOWR(0x05, drm_client32_t)
  46 #define DRM_IOCTL_GET_STATS32           DRM_IOR( 0x06, drm_stats32_t)
  47
  48 #define DRM_IOCTL_SET_UNIQUE32          DRM_IOW( 0x10, drm_unique32_t)
  49 #define DRM_IOCTL_ADD_MAP32             DRM_IOWR(0x15, drm_map32_t)
  50 #define DRM_IOCTL_ADD_BUFS32            DRM_IOWR(0x16, drm_buf_desc32_t)
  51 #define DRM_IOCTL_MARK_BUFS32           DRM_IOW( 0x17, drm_buf_desc32_t)
  52 #define DRM_IOCTL_INFO_BUFS32           DRM_IOWR(0x18, drm_buf_info32_t)
  53 #define DRM_IOCTL_MAP_BUFS32            DRM_IOWR(0x19, drm_buf_map32_t)
  54 #define DRM_IOCTL_FREE_BUFS32           DRM_IOW( 0x1a, drm_buf_free32_t)
  55
  56 #define DRM_IOCTL_RM_MAP32              DRM_IOW( 0x1b, drm_map32_t)
  57
  58 #define DRM_IOCTL_SET_SAREA_CTX32       DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
  59 #define DRM_IOCTL_GET_SAREA_CTX32       DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
  60
  61 #define DRM_IOCTL_RES_CTX32             DRM_IOWR(0x26, drm_ctx_res32_t)
  62 #define DRM_IOCTL_DMA32                 DRM_IOWR(0x29, drm_dma32_t)
  63
  64 #define DRM_IOCTL_AGP_ENABLE32          DRM_IOW( 0x32, drm_agp_mode32_t)
  65 #define DRM_IOCTL_AGP_INFO32            DRM_IOR( 0x33, drm_agp_info32_t)
  66 #define DRM_IOCTL_AGP_ALLOC32           DRM_IOWR(0x34, drm_agp_buffer32_t)
  67 #define DRM_IOCTL_AGP_FREE32            DRM_IOW( 0x35, drm_agp_buffer32_t)
  68 #define DRM_IOCTL_AGP_BIND32            DRM_IOW( 0x36, drm_agp_binding32_t)
  69 #define DRM_IOCTL_AGP_UNBIND32          DRM_IOW( 0x37, drm_agp_binding32_t)
  70
  71 #define DRM_IOCTL_SG_ALLOC32            DRM_IOW( 0x38, drm_scatter_gather32_t)
  72 #define DRM_IOCTL_SG_FREE32             DRM_IOW( 0x39, drm_scatter_gather32_t)
  73
  74 #define DRM_IOCTL_UPDATE_DRAW32         DRM_IOW( 0x3f, drm_update_draw32_t)
  75
  76 #define DRM_IOCTL_WAIT_VBLANK32         DRM_IOWR(0x3a, drm_wait_vblank32_t)
  77
  78 #define DRM_IOCTL_MODE_ADDFB232         DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
  79
  80 typedef struct drm_version_32 {
  81         int version_major;        /* Major version */
  82         int version_minor;        /* Minor version */
  83         int version_patchlevel;    /* Patch level */
  84         u32 name_len;             /* Length of name buffer */
  85         u32 name;                 /* Name of driver */
  86         u32 date_len;             /* Length of date buffer */
  87         u32 date;                 /* User-space buffer to hold date */
  88         u32 desc_len;             /* Length of desc buffer */
  89         u32 desc;                 /* User-space buffer to hold desc */
  90 } drm_version32_t;
  91
  92 static int compat_drm_version(struct file *file, unsigned int cmd,
  93                               unsigned long arg)
  94 {
  95         drm_version32_t v32;
  96         struct drm_version v;
  97         int err;
  98
  99         if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
 100                 return -EFAULT;
 101
 102         v = (struct drm_version) {
 103                 .name_len = v32.name_len,
 104                 .name = compat_ptr(v32.name),
 105                 .date_len = v32.date_len,
 106                 .date = compat_ptr(v32.date),
 107                 .desc_len = v32.desc_len,
 108                 .desc = compat_ptr(v32.desc),
 109         };
 110         err = drm_ioctl_kernel(file, drm_version, &v,
 111                                DRM_RENDER_ALLOW);
 112         if (err)
 113                 return err;
 114
 115         v32.version_major = v.version_major;
 116         v32.version_minor = v.version_minor;
 117         v32.version_patchlevel = v.version_patchlevel;
 118         v32.name_len = v.name_len;
 119         v32.date_len = v.date_len;
 120         v32.desc_len = v.desc_len;
 121         if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
 122                 return -EFAULT;
 123         return 0;
 124 }
 125
 126 typedef struct drm_unique32 {
 127         u32 unique_len; /* Length of unique */
 128         u32 unique;     /* Unique name for driver instantiation */
 129 } drm_unique32_t;
 130
 131 static int compat_drm_getunique(struct file *file, unsigned int cmd,
 132                                 unsigned long arg)
 133 {
 134         drm_unique32_t uq32;
 135         struct drm_unique uq;
 136         int err;
 137
 138         if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
 139                 return -EFAULT;
 140         uq = (struct drm_unique){
 141                 .unique_len = uq32.unique_len,
 142                 .unique = compat_ptr(uq32.unique),
 143         };
 144
 145         err = drm_ioctl_kernel(file, drm_getunique, &uq, 0);
 146         if (err)
 147                 return err;
 148
 149         uq32.unique_len = uq.unique_len;
 150         if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
 151                 return -EFAULT;
 152         return 0;
 153 }
 154
 155 static int compat_drm_setunique(struct file *file, unsigned int cmd,
 156                                 unsigned long arg)
 157 {
 158         /* it's dead */
 159         return -EINVAL;
 160 }
 161
 162 #if IS_ENABLED(CONFIG_DRM_LEGACY)
 163 typedef struct drm_map32 {
 164         u32 offset;             /* Requested physical address (0 for SAREA) */
 165         u32 size;               /* Requested physical size (bytes) */
 166         enum drm_map_type type; /* Type of memory to map */
 167         enum drm_map_flags flags;       /* Flags */
 168         u32 handle;             /* User-space: "Handle" to pass to mmap() */
 169         int mtrr;               /* MTRR slot used */
 170 } drm_map32_t;
 171
 172 static int compat_drm_getmap(struct file *file, unsigned int cmd,
 173                              unsigned long arg)
 174 {
 175         drm_map32_t __user *argp = (void __user *)arg;
 176         drm_map32_t m32;
 177         struct drm_map map;
 178         int err;
 179
 180         if (copy_from_user(&m32, argp, sizeof(m32)))
 181                 return -EFAULT;
 182
 183         map.offset = m32.offset;
 184         err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, 0);
 185         if (err)
 186                 return err;
 187
 188         m32.offset = map.offset;
 189         m32.size = map.size;
 190         m32.type = map.type;
 191         m32.flags = map.flags;
 192         m32.handle = ptr_to_compat((void __user *)map.handle);
 193         m32.mtrr = map.mtrr;
 194         if (copy_to_user(argp, &m32, sizeof(m32)))
 195                 return -EFAULT;
 196         return 0;
 197
 198 }
 199
 200 static int compat_drm_addmap(struct file *file, unsigned int cmd,
 201                              unsigned long arg)
 202 {
 203         drm_map32_t __user *argp = (void __user *)arg;
 204         drm_map32_t m32;
 205         struct drm_map map;
 206         int err;
 207
 208         if (copy_from_user(&m32, argp, sizeof(m32)))
 209                 return -EFAULT;
 210
 211         map.offset = m32.offset;
 212         map.size = m32.size;
 213         map.type = m32.type;
 214         map.flags = m32.flags;
 215
 216         err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
 217                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 218         if (err)
 219                 return err;
 220
 221         m32.offset = map.offset;
 222         m32.mtrr = map.mtrr;
 223         m32.handle = ptr_to_compat((void __user *)map.handle);
 224         if (map.handle != compat_ptr(m32.handle))
 225                 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
 226                                    map.handle, m32.type, m32.offset);
 227
 228         if (copy_to_user(argp, &m32, sizeof(m32)))
 229                 return -EFAULT;
 230
 231         return 0;
 232 }
 233
 234 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
 235                             unsigned long arg)
 236 {
 237         drm_map32_t __user *argp = (void __user *)arg;
 238         struct drm_map map;
 239         u32 handle;
 240
 241         if (get_user(handle, &argp->handle))
 242                 return -EFAULT;
 243         map.handle = compat_ptr(handle);
 244         return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
 245 }
 246 #endif
 247
 248 typedef struct drm_client32 {
 249         int idx;        /* Which client desired? */
 250         int auth;       /* Is client authenticated? */
 251         u32 pid;        /* Process ID */
 252         u32 uid;        /* User ID */
 253         u32 magic;      /* Magic */
 254         u32 iocs;       /* Ioctl count */
 255 } drm_client32_t;
 256
 257 static int compat_drm_getclient(struct file *file, unsigned int cmd,
 258                                 unsigned long arg)
 259 {
 260         drm_client32_t c32;
 261         drm_client32_t __user *argp = (void __user *)arg;
 262         struct drm_client client;
 263         int err;
 264
 265         if (copy_from_user(&c32, argp, sizeof(c32)))
 266                 return -EFAULT;
 267
 268         client.idx = c32.idx;
 269
 270         err = drm_ioctl_kernel(file, drm_getclient, &client, 0);
 271         if (err)
 272                 return err;
 273
 274         c32.idx = client.idx;
 275         c32.auth = client.auth;
 276         c32.pid = client.pid;
 277         c32.uid = client.uid;
 278         c32.magic = client.magic;
 279         c32.iocs = client.iocs;
 280
 281         if (copy_to_user(argp, &c32, sizeof(c32)))
 282                 return -EFAULT;
 283         return 0;
 284 }
 285
 286 typedef struct drm_stats32 {
 287         u32 count;
 288         struct {
 289                 u32 value;
 290                 enum drm_stat_type type;
 291         } data[15];
 292 } drm_stats32_t;
 293
 294 static int compat_drm_getstats(struct file *file, unsigned int cmd,
 295                                unsigned long arg)
 296 {
 297         drm_stats32_t __user *argp = (void __user *)arg;
 298         int err;
 299
 300         err = drm_ioctl_kernel(file, drm_noop, NULL, 0);
 301         if (err)
 302                 return err;
 303
 304         if (clear_user(argp, sizeof(drm_stats32_t)))
 305                 return -EFAULT;
 306         return 0;
 307 }
 308
 309 #if IS_ENABLED(CONFIG_DRM_LEGACY)
 310 typedef struct drm_buf_desc32 {
 311         int count;               /* Number of buffers of this size */
 312         int size;                /* Size in bytes */
 313         int low_mark;            /* Low water mark */
 314         int high_mark;           /* High water mark */
 315         int flags;
 316         u32 agp_start;           /* Start address in the AGP aperture */
 317 } drm_buf_desc32_t;
 318
 319 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
 320                               unsigned long arg)
 321 {
 322         drm_buf_desc32_t __user *argp = (void __user *)arg;
 323         drm_buf_desc32_t desc32;
 324         struct drm_buf_desc desc;
 325         int err;
 326
 327         if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
 328                 return -EFAULT;
 329
 330         desc = (struct drm_buf_desc){
 331                 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
 332                 desc32.flags, desc32.agp_start
 333         };
 334
 335         err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
 336                                    DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 337         if (err)
 338                 return err;
 339
 340         desc32 = (drm_buf_desc32_t){
 341                 desc.count, desc.size, desc.low_mark, desc.high_mark,
 342                 desc.flags, desc.agp_start
 343         };
 344         if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
 345                 return -EFAULT;
 346
 347         return 0;
 348 }
 349
 350 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
 351                                unsigned long arg)
 352 {
 353         drm_buf_desc32_t b32;
 354         drm_buf_desc32_t __user *argp = (void __user *)arg;
 355         struct drm_buf_desc buf;
 356
 357         if (copy_from_user(&b32, argp, sizeof(b32)))
 358                 return -EFAULT;
 359
 360         buf.size = b32.size;
 361         buf.low_mark = b32.low_mark;
 362         buf.high_mark = b32.high_mark;
 363
 364         return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
 365                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 366 }
 367
 368 typedef struct drm_buf_info32 {
 369         int count;              /**< Entries in list */
 370         u32 list;
 371 } drm_buf_info32_t;
 372
 373 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
 374 {
 375         drm_buf_info32_t *request = data;
 376         drm_buf_desc32_t __user *to = compat_ptr(request->list);
 377         drm_buf_desc32_t v = {.count = from->buf_count,
 378                               .size = from->buf_size,
 379                               .low_mark = from->low_mark,
 380                               .high_mark = from->high_mark};
 381
 382         if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags)))
 383                 return -EFAULT;
 384         return 0;
 385 }
 386
 387 static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
 388                         struct drm_file *file_priv)
 389 {
 390         drm_buf_info32_t *request = data;
 391         return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
 392 }
 393
 394 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
 395                                unsigned long arg)
 396 {
 397         drm_buf_info32_t req32;
 398         drm_buf_info32_t __user *argp = (void __user *)arg;
 399         int err;
 400
 401         if (copy_from_user(&req32, argp, sizeof(req32)))
 402                 return -EFAULT;
 403
 404         if (req32.count < 0)
 405                 req32.count = 0;
 406
 407         err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
 408         if (err)
 409                 return err;
 410
 411         if (put_user(req32.count, &argp->count))
 412                 return -EFAULT;
 413
 414         return 0;
 415 }
 416
 417 typedef struct drm_buf_pub32 {
 418         int idx;                /**< Index into the master buffer list */
 419         int total;              /**< Buffer size */
 420         int used;               /**< Amount of buffer in use (for DMA) */
 421         u32 address;            /**< Address of buffer */
 422 } drm_buf_pub32_t;
 423
 424 typedef struct drm_buf_map32 {
 425         int count;              /**< Length of the buffer list */
 426         u32 virtual;            /**< Mmap'd area in user-virtual */
 427         u32 list;               /**< Buffer information */
 428 } drm_buf_map32_t;
 429
 430 static int map_one_buf32(void *data, int idx, unsigned long virtual,
 431                         struct drm_buf *buf)
 432 {
 433         drm_buf_map32_t *request = data;
 434         drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
 435         drm_buf_pub32_t v;
 436
 437         v.idx = buf->idx;
 438         v.total = buf->total;
 439         v.used = 0;
 440         v.address = virtual + buf->offset;
 441         if (copy_to_user(to, &v, sizeof(v)))
 442                 return -EFAULT;
 443         return 0;
 444 }
 445
 446 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
 447                        struct drm_file *file_priv)
 448 {
 449         drm_buf_map32_t *request = data;
 450         void __user *v;
 451         int err = __drm_legacy_mapbufs(dev, data, &request->count,
 452                                     &v, map_one_buf32,
 453                                     file_priv);
 454         request->virtual = ptr_to_compat(v);
 455         return err;
 456 }
 457
 458 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
 459                               unsigned long arg)
 460 {
 461         drm_buf_map32_t __user *argp = (void __user *)arg;
 462         drm_buf_map32_t req32;
 463         int err;
 464
 465         if (copy_from_user(&req32, argp, sizeof(req32)))
 466                 return -EFAULT;
 467         if (req32.count < 0)
 468                 return -EINVAL;
 469
 470         err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
 471         if (err)
 472                 return err;
 473
 474         if (put_user(req32.count, &argp->count)
 475             || put_user(req32.virtual, &argp->virtual))
 476                 return -EFAULT;
 477
 478         return 0;
 479 }
 480
 481 typedef struct drm_buf_free32 {
 482         int count;
 483         u32 list;
 484 } drm_buf_free32_t;
 485
 486 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
 487                                unsigned long arg)
 488 {
 489         drm_buf_free32_t req32;
 490         struct drm_buf_free request;
 491         drm_buf_free32_t __user *argp = (void __user *)arg;
 492
 493         if (copy_from_user(&req32, argp, sizeof(req32)))
 494                 return -EFAULT;
 495
 496         request.count = req32.count;
 497         request.list = compat_ptr(req32.list);
 498         return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
 499 }
 500
 501 typedef struct drm_ctx_priv_map32 {
 502         unsigned int ctx_id;     /**< Context requesting private mapping */
 503         u32 handle;             /**< Handle of map */
 504 } drm_ctx_priv_map32_t;
 505
 506 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
 507                                   unsigned long arg)
 508 {
 509         drm_ctx_priv_map32_t req32;
 510         struct drm_ctx_priv_map request;
 511         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 512
 513         if (copy_from_user(&req32, argp, sizeof(req32)))
 514                 return -EFAULT;
 515
 516         request.ctx_id = req32.ctx_id;
 517         request.handle = compat_ptr(req32.handle);
 518         return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
 519                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 520 }
 521
 522 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
 523                                   unsigned long arg)
 524 {
 525         struct drm_ctx_priv_map req;
 526         drm_ctx_priv_map32_t req32;
 527         drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
 528         int err;
 529
 530         if (copy_from_user(&req32, argp, sizeof(req32)))
 531                 return -EFAULT;
 532
 533         req.ctx_id = req32.ctx_id;
 534         err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
 535         if (err)
 536                 return err;
 537
 538         req32.handle = ptr_to_compat((void __user *)req.handle);
 539         if (copy_to_user(argp, &req32, sizeof(req32)))
 540                 return -EFAULT;
 541
 542         return 0;
 543 }
 544
 545 typedef struct drm_ctx_res32 {
 546         int count;
 547         u32 contexts;
 548 } drm_ctx_res32_t;
 549
 550 static int compat_drm_resctx(struct file *file, unsigned int cmd,
 551                              unsigned long arg)
 552 {
 553         drm_ctx_res32_t __user *argp = (void __user *)arg;
 554         drm_ctx_res32_t res32;
 555         struct drm_ctx_res res;
 556         int err;
 557
 558         if (copy_from_user(&res32, argp, sizeof(res32)))
 559                 return -EFAULT;
 560
 561         res.count = res32.count;
 562         res.contexts = compat_ptr(res32.contexts);
 563         err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
 564         if (err)
 565                 return err;
 566
 567         res32.count = res.count;
 568         if (copy_to_user(argp, &res32, sizeof(res32)))
 569                 return -EFAULT;
 570
 571         return 0;
 572 }
 573
 574 typedef struct drm_dma32 {
 575         int context;              /**< Context handle */
 576         int send_count;           /**< Number of buffers to send */
 577         u32 send_indices;         /**< List of handles to buffers */
 578         u32 send_sizes;           /**< Lengths of data to send */
 579         enum drm_dma_flags flags;                 /**< Flags */
 580         int request_count;        /**< Number of buffers requested */
 581         int request_size;         /**< Desired size for buffers */
 582         u32 request_indices;      /**< Buffer information */
 583         u32 request_sizes;
 584         int granted_count;        /**< Number of buffers granted */
 585 } drm_dma32_t;
 586
 587 static int compat_drm_dma(struct file *file, unsigned int cmd,
 588                           unsigned long arg)
 589 {
 590         drm_dma32_t d32;
 591         drm_dma32_t __user *argp = (void __user *)arg;
 592         struct drm_dma d;
 593         int err;
 594
 595         if (copy_from_user(&d32, argp, sizeof(d32)))
 596                 return -EFAULT;
 597
 598         d.context = d32.context;
 599         d.send_count = d32.send_count;
 600         d.send_indices = compat_ptr(d32.send_indices);
 601         d.send_sizes = compat_ptr(d32.send_sizes);
 602         d.flags = d32.flags;
 603         d.request_count = d32.request_count;
 604         d.request_indices = compat_ptr(d32.request_indices);
 605         d.request_sizes = compat_ptr(d32.request_sizes);
 606         err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
 607         if (err)
 608                 return err;
 609
 610         if (put_user(d.request_size, &argp->request_size)
 611             || put_user(d.granted_count, &argp->granted_count))
 612                 return -EFAULT;
 613
 614         return 0;
 615 }
 616 #endif
 617
 618 #if IS_ENABLED(CONFIG_AGP)
 619 typedef struct drm_agp_mode32 {
 620         u32 mode;       /**< AGP mode */
 621 } drm_agp_mode32_t;
 622
 623 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
 624                                  unsigned long arg)
 625 {
 626         drm_agp_mode32_t __user *argp = (void __user *)arg;
 627         struct drm_agp_mode mode;
 628
 629         if (get_user(mode.mode, &argp->mode))
 630                 return -EFAULT;
 631
 632         return drm_ioctl_kernel(file,  drm_agp_enable_ioctl, &mode,
 633                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 634 }
 635
 636 typedef struct drm_agp_info32 {
 637         int agp_version_major;
 638         int agp_version_minor;
 639         u32 mode;
 640         u32 aperture_base;      /* physical address */
 641         u32 aperture_size;      /* bytes */
 642         u32 memory_allowed;     /* bytes */
 643         u32 memory_used;
 644
 645         /* PCI information */
 646         unsigned short id_vendor;
 647         unsigned short id_device;
 648 } drm_agp_info32_t;
 649
 650 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
 651                                unsigned long arg)
 652 {
 653         drm_agp_info32_t __user *argp = (void __user *)arg;
 654         drm_agp_info32_t i32;
 655         struct drm_agp_info info;
 656         int err;
 657
 658         err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
 659         if (err)
 660                 return err;
 661
 662         i32.agp_version_major = info.agp_version_major;
 663         i32.agp_version_minor = info.agp_version_minor;
 664         i32.mode = info.mode;
 665         i32.aperture_base = info.aperture_base;
 666         i32.aperture_size = info.aperture_size;
 667         i32.memory_allowed = info.memory_allowed;
 668         i32.memory_used = info.memory_used;
 669         i32.id_vendor = info.id_vendor;
 670         i32.id_device = info.id_device;
 671         if (copy_to_user(argp, &i32, sizeof(i32)))
 672                 return -EFAULT;
 673
 674         return 0;
 675 }
 676
 677 typedef struct drm_agp_buffer32 {
 678         u32 size;       /**< In bytes -- will round to page boundary */
 679         u32 handle;     /**< Used for binding / unbinding */
 680         u32 type;       /**< Type of memory to allocate */
 681         u32 physical;   /**< Physical used by i810 */
 682 } drm_agp_buffer32_t;
 683
 684 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
 685                                 unsigned long arg)
 686 {
 687         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 688         drm_agp_buffer32_t req32;
 689         struct drm_agp_buffer request;
 690         int err;
 691
 692         if (copy_from_user(&req32, argp, sizeof(req32)))
 693                 return -EFAULT;
 694
 695         request.size = req32.size;
 696         request.type = req32.type;
 697         err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
 698                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 699         if (err)
 700                 return err;
 701
 702         req32.handle = request.handle;
 703         req32.physical = request.physical;
 704         if (copy_to_user(argp, &req32, sizeof(req32))) {
 705                 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
 706                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 707                 return -EFAULT;
 708         }
 709
 710         return 0;
 711 }
 712
 713 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
 714                                unsigned long arg)
 715 {
 716         drm_agp_buffer32_t __user *argp = (void __user *)arg;
 717         struct drm_agp_buffer request;
 718
 719         if (get_user(request.handle, &argp->handle))
 720                 return -EFAULT;
 721
 722         return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
 723                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 724 }
 725
 726 typedef struct drm_agp_binding32 {
 727         u32 handle;     /**< From drm_agp_buffer */
 728         u32 offset;     /**< In bytes -- will round to page boundary */
 729 } drm_agp_binding32_t;
 730
 731 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
 732                                unsigned long arg)
 733 {
 734         drm_agp_binding32_t __user *argp = (void __user *)arg;
 735         drm_agp_binding32_t req32;
 736         struct drm_agp_binding request;
 737
 738         if (copy_from_user(&req32, argp, sizeof(req32)))
 739                 return -EFAULT;
 740
 741         request.handle = req32.handle;
 742         request.offset = req32.offset;
 743         return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
 744                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 745 }
 746
 747 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
 748                                  unsigned long arg)
 749 {
 750         drm_agp_binding32_t __user *argp = (void __user *)arg;
 751         struct drm_agp_binding request;
 752
 753         if (get_user(request.handle, &argp->handle))
 754                 return -EFAULT;
 755
 756         return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
 757                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 758 }
 759 #endif /* CONFIG_AGP */
 760
 761 #if IS_ENABLED(CONFIG_DRM_LEGACY)
 762 typedef struct drm_scatter_gather32 {
 763         u32 size;       /**< In bytes -- will round to page boundary */
 764         u32 handle;     /**< Used for mapping / unmapping */
 765 } drm_scatter_gather32_t;
 766
 767 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
 768                                unsigned long arg)
 769 {
 770         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 771         struct drm_scatter_gather request;
 772         int err;
 773
 774         if (get_user(request.size, &argp->size))
 775                 return -EFAULT;
 776
 777         err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
 778                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 779         if (err)
 780                 return err;
 781
 782         /* XXX not sure about the handle conversion here... */
 783         if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
 784                 return -EFAULT;
 785
 786         return 0;
 787 }
 788
 789 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
 790                               unsigned long arg)
 791 {
 792         drm_scatter_gather32_t __user *argp = (void __user *)arg;
 793         struct drm_scatter_gather request;
 794         unsigned long x;
 795
 796         if (get_user(x, &argp->handle))
 797                 return -EFAULT;
 798         request.handle = x << PAGE_SHIFT;
 799         return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
 800                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 801 }
 802 #endif
 803 #if defined(CONFIG_X86)
 804 typedef struct drm_update_draw32 {
 805         drm_drawable_t handle;
 806         unsigned int type;
 807         unsigned int num;
 808         /* 64-bit version has a 32-bit pad here */
 809         u64 data;       /**< Pointer */
 810 } __attribute__((packed)) drm_update_draw32_t;
 811
 812 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
 813                                   unsigned long arg)
 814 {
 815         drm_update_draw32_t update32;
 816         if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
 817                 return -EFAULT;
 818
 819         return drm_ioctl_kernel(file, drm_noop, NULL,
 820                                 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
 821 }
 822 #endif
 823
 824 struct drm_wait_vblank_request32 {
 825         enum drm_vblank_seq_type type;
 826         unsigned int sequence;
 827         u32 signal;
 828 };
 829
 830 struct drm_wait_vblank_reply32 {
 831         enum drm_vblank_seq_type type;
 832         unsigned int sequence;
 833         s32 tval_sec;
 834         s32 tval_usec;
 835 };
 836
 837 typedef union drm_wait_vblank32 {
 838         struct drm_wait_vblank_request32 request;
 839         struct drm_wait_vblank_reply32 reply;
 840 } drm_wait_vblank32_t;
 841
 842 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
 843                                   unsigned long arg)
 844 {
 845         drm_wait_vblank32_t __user *argp = (void __user *)arg;
 846         drm_wait_vblank32_t req32;
 847         union drm_wait_vblank req;
 848         int err;
 849
 850         if (copy_from_user(&req32, argp, sizeof(req32)))
 851                 return -EFAULT;
 852
 853         req.request.type = req32.request.type;
 854         req.request.sequence = req32.request.sequence;
 855         req.request.signal = req32.request.signal;
 856         err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
 857         if (err)
 858                 return err;
 859
 860         req32.reply.type = req.reply.type;
 861         req32.reply.sequence = req.reply.sequence;
 862         req32.reply.tval_sec = req.reply.tval_sec;
 863         req32.reply.tval_usec = req.reply.tval_usec;
 864         if (copy_to_user(argp, &req32, sizeof(req32)))
 865                 return -EFAULT;
 866
 867         return 0;
 868 }
 869
 870 #if defined(CONFIG_X86)
 871 typedef struct drm_mode_fb_cmd232 {
 872         u32 fb_id;
 873         u32 width;
 874         u32 height;
 875         u32 pixel_format;
 876         u32 flags;
 877         u32 handles[4];
 878         u32 pitches[4];
 879         u32 offsets[4];
 880         u64 modifier[4];
 881 } __attribute__((packed)) drm_mode_fb_cmd232_t;
 882
 883 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
 884                                   unsigned long arg)
 885 {
 886         struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
 887         struct drm_mode_fb_cmd2 req64;
 888         int err;
 889
 890         if (copy_from_user(&req64, argp,
 891                            offsetof(drm_mode_fb_cmd232_t, modifier)))
 892                 return -EFAULT;
 893
 894         if (copy_from_user(&req64.modifier, &argp->modifier,
 895                            sizeof(req64.modifier)))
 896                 return -EFAULT;
 897
 898         err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0);
 899         if (err)
 900                 return err;
 901
 902         if (put_user(req64.fb_id, &argp->fb_id))
 903                 return -EFAULT;
 904
 905         return 0;
 906 }
 907 #endif
 908
 909 static struct {
 910         drm_ioctl_compat_t *fn;
 911         char *name;
 912 } drm_compat_ioctls[] = {
 913 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
 914         DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
 915         DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
 916 #if IS_ENABLED(CONFIG_DRM_LEGACY)
 917         DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
 918 #endif
 919         DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
 920         DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
 921         DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
 922 #if IS_ENABLED(CONFIG_DRM_LEGACY)
 923         DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
 924         DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
 925         DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
 926         DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
 927         DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
 928         DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
 929         DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
 930         DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
 931         DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
 932         DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
 933         DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
 934 #endif
 935 #if IS_ENABLED(CONFIG_AGP)
 936         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
 937         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
 938         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
 939         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
 940         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
 941         DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
 942 #endif
 943 #if IS_ENABLED(CONFIG_DRM_LEGACY)
 944         DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
 945         DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
 946 #endif
 947 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
 948         DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
 949 #endif
 950         DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
 951 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
 952         DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
 953 #endif
 954 };
 955
 956 /**
 957  * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
 958  * @filp: file this ioctl is called on
 959  * @cmd: ioctl cmd number
 960  * @arg: user argument
 961  *
 962  * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
 963  * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
 964  * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
 965  * botched IOCTL itself, it must handle those by wrapping this function.
 966  *
 967  * Returns:
 968  * Zero on success, negative error code on failure.
 969  */
 970 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 971 {
 972         unsigned int nr = DRM_IOCTL_NR(cmd);
 973         struct drm_file *file_priv = filp->private_data;
 974         drm_ioctl_compat_t *fn;
 975         int ret;
 976
 977         /* Assume that ioctls without an explicit compat routine will just
 978          * work.  This may not always be a good assumption, but it's better
 979          * than always failing.
 980          */
 981         if (nr >= ARRAY_SIZE(drm_compat_ioctls))
 982                 return drm_ioctl(filp, cmd, arg);
 983
 984         fn = drm_compat_ioctls[nr].fn;
 985         if (!fn)
 986                 return drm_ioctl(filp, cmd, arg);
 987
 988         DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
 989                   task_pid_nr(current),
 990                   (long)old_encode_dev(file_priv->minor->kdev->devt),
 991                   file_priv->authenticated,
 992                   drm_compat_ioctls[nr].name);
 993         ret = (*fn)(filp, cmd, arg);
 994         if (ret)
 995                 DRM_DEBUG("ret = %d\n", ret);
 996         return ret;
 997 }
 998 EXPORT_SYMBOL(drm_compat_ioctl);