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/drm_core.h> 36 37 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) 38 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) 39 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) 40 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) 41 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) 42 43 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) 44 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) 45 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) 46 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) 47 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) 48 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) 49 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) 50 51 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) 52 53 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) 54 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) 55 56 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) 57 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) 58 59 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) 60 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) 61 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) 62 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) 63 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) 64 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) 65 66 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) 67 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) 68 69 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) 70 71 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) 72 73 typedef struct drm_version_32 { 74 int version_major; /**< Major version */ 75 int version_minor; /**< Minor version */ 76 int version_patchlevel; /**< Patch level */ 77 u32 name_len; /**< Length of name buffer */ 78 u32 name; /**< Name of driver */ 79 u32 date_len; /**< Length of date buffer */ 80 u32 date; /**< User-space buffer to hold date */ 81 u32 desc_len; /**< Length of desc buffer */ 82 u32 desc; /**< User-space buffer to hold desc */ 83 } drm_version32_t; 84 85 static int compat_drm_version(struct file *file, unsigned int cmd, 86 unsigned long arg) 87 { 88 drm_version32_t v32; 89 struct drm_version __user *version; 90 int err; 91 92 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) 93 return -EFAULT; 94 95 version = compat_alloc_user_space(sizeof(*version)); 96 if (!access_ok(VERIFY_WRITE, version, sizeof(*version))) 97 return -EFAULT; 98 if (__put_user(v32.name_len, &version->name_len) 99 || __put_user((void __user *)(unsigned long)v32.name, 100 &version->name) 101 || __put_user(v32.date_len, &version->date_len) 102 || __put_user((void __user *)(unsigned long)v32.date, 103 &version->date) 104 || __put_user(v32.desc_len, &version->desc_len) 105 || __put_user((void __user *)(unsigned long)v32.desc, 106 &version->desc)) 107 return -EFAULT; 108 109 err = drm_ioctl(file, 110 DRM_IOCTL_VERSION, (unsigned long)version); 111 if (err) 112 return err; 113 114 if (__get_user(v32.version_major, &version->version_major) 115 || __get_user(v32.version_minor, &version->version_minor) 116 || __get_user(v32.version_patchlevel, &version->version_patchlevel) 117 || __get_user(v32.name_len, &version->name_len) 118 || __get_user(v32.date_len, &version->date_len) 119 || __get_user(v32.desc_len, &version->desc_len)) 120 return -EFAULT; 121 122 if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) 123 return -EFAULT; 124 return 0; 125 } 126 127 typedef struct drm_unique32 { 128 u32 unique_len; /**< Length of unique */ 129 u32 unique; /**< Unique name for driver instantiation */ 130 } drm_unique32_t; 131 132 static int compat_drm_getunique(struct file *file, unsigned int cmd, 133 unsigned long arg) 134 { 135 drm_unique32_t uq32; 136 struct drm_unique __user *u; 137 int err; 138 139 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 140 return -EFAULT; 141 142 u = compat_alloc_user_space(sizeof(*u)); 143 if (!access_ok(VERIFY_WRITE, u, sizeof(*u))) 144 return -EFAULT; 145 if (__put_user(uq32.unique_len, &u->unique_len) 146 || __put_user((void __user *)(unsigned long)uq32.unique, 147 &u->unique)) 148 return -EFAULT; 149 150 err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u); 151 if (err) 152 return err; 153 154 if (__get_user(uq32.unique_len, &u->unique_len)) 155 return -EFAULT; 156 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) 157 return -EFAULT; 158 return 0; 159 } 160 161 static int compat_drm_setunique(struct file *file, unsigned int cmd, 162 unsigned long arg) 163 { 164 drm_unique32_t uq32; 165 struct drm_unique __user *u; 166 167 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 168 return -EFAULT; 169 170 u = compat_alloc_user_space(sizeof(*u)); 171 if (!access_ok(VERIFY_WRITE, u, sizeof(*u))) 172 return -EFAULT; 173 if (__put_user(uq32.unique_len, &u->unique_len) 174 || __put_user((void __user *)(unsigned long)uq32.unique, 175 &u->unique)) 176 return -EFAULT; 177 178 return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u); 179 } 180 181 typedef struct drm_map32 { 182 u32 offset; /**< Requested physical address (0 for SAREA)*/ 183 u32 size; /**< Requested physical size (bytes) */ 184 enum drm_map_type type; /**< Type of memory to map */ 185 enum drm_map_flags flags; /**< Flags */ 186 u32 handle; /**< User-space: "Handle" to pass to mmap() */ 187 int mtrr; /**< MTRR slot used */ 188 } drm_map32_t; 189 190 static int compat_drm_getmap(struct file *file, unsigned int cmd, 191 unsigned long arg) 192 { 193 drm_map32_t __user *argp = (void __user *)arg; 194 drm_map32_t m32; 195 struct drm_map __user *map; 196 int idx, err; 197 void *handle; 198 199 if (get_user(idx, &argp->offset)) 200 return -EFAULT; 201 202 map = compat_alloc_user_space(sizeof(*map)); 203 if (!access_ok(VERIFY_WRITE, map, sizeof(*map))) 204 return -EFAULT; 205 if (__put_user(idx, &map->offset)) 206 return -EFAULT; 207 208 err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map); 209 if (err) 210 return err; 211 212 if (__get_user(m32.offset, &map->offset) 213 || __get_user(m32.size, &map->size) 214 || __get_user(m32.type, &map->type) 215 || __get_user(m32.flags, &map->flags) 216 || __get_user(handle, &map->handle) 217 || __get_user(m32.mtrr, &map->mtrr)) 218 return -EFAULT; 219 220 m32.handle = (unsigned long)handle; 221 if (copy_to_user(argp, &m32, sizeof(m32))) 222 return -EFAULT; 223 return 0; 224 225 } 226 227 static int compat_drm_addmap(struct file *file, unsigned int cmd, 228 unsigned long arg) 229 { 230 drm_map32_t __user *argp = (void __user *)arg; 231 drm_map32_t m32; 232 struct drm_map __user *map; 233 int err; 234 void *handle; 235 236 if (copy_from_user(&m32, argp, sizeof(m32))) 237 return -EFAULT; 238 239 map = compat_alloc_user_space(sizeof(*map)); 240 if (!access_ok(VERIFY_WRITE, map, sizeof(*map))) 241 return -EFAULT; 242 if (__put_user(m32.offset, &map->offset) 243 || __put_user(m32.size, &map->size) 244 || __put_user(m32.type, &map->type) 245 || __put_user(m32.flags, &map->flags)) 246 return -EFAULT; 247 248 err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map); 249 if (err) 250 return err; 251 252 if (__get_user(m32.offset, &map->offset) 253 || __get_user(m32.mtrr, &map->mtrr) 254 || __get_user(handle, &map->handle)) 255 return -EFAULT; 256 257 m32.handle = (unsigned long)handle; 258 if (m32.handle != (unsigned long)handle) 259 printk_ratelimited(KERN_ERR "compat_drm_addmap truncated handle" 260 " %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 (!access_ok(VERIFY_WRITE, map, sizeof(*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 (!access_ok(VERIFY_WRITE, client, sizeof(*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 stats = compat_alloc_user_space(sizeof(*stats)); 348 if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats))) 349 return -EFAULT; 350 351 err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats); 352 if (err) 353 return err; 354 355 if (__get_user(s32.count, &stats->count)) 356 return -EFAULT; 357 for (i = 0; i < 15; ++i) 358 if (__get_user(s32.data[i].value, &stats->data[i].value) 359 || __get_user(s32.data[i].type, &stats->data[i].type)) 360 return -EFAULT; 361 362 if (copy_to_user(argp, &s32, sizeof(s32))) 363 return -EFAULT; 364 return 0; 365 } 366 367 typedef struct drm_buf_desc32 { 368 int count; /**< Number of buffers of this size */ 369 int size; /**< Size in bytes */ 370 int low_mark; /**< Low water mark */ 371 int high_mark; /**< High water mark */ 372 int flags; 373 u32 agp_start; /**< Start address in the AGP aperture */ 374 } drm_buf_desc32_t; 375 376 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 377 unsigned long arg) 378 { 379 drm_buf_desc32_t __user *argp = (void __user *)arg; 380 struct drm_buf_desc __user *buf; 381 int err; 382 unsigned long agp_start; 383 384 buf = compat_alloc_user_space(sizeof(*buf)); 385 if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf)) 386 || !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 (!access_ok(VERIFY_WRITE, buf, sizeof(*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 (!access_ok(VERIFY_WRITE, request, nbytes)) 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 (!access_ok(VERIFY_WRITE, request, nbytes)) 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 (!access_ok(VERIFY_WRITE, request, sizeof(*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 (!access_ok(VERIFY_WRITE, request, sizeof(*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 (!access_ok(VERIFY_WRITE, request, sizeof(*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 (!access_ok(VERIFY_WRITE, res, sizeof(*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 (!access_ok(VERIFY_WRITE, d, sizeof(*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 __OS_HAS_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 (!access_ok(VERIFY_WRITE, info, sizeof(*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 (!access_ok(VERIFY_WRITE, request, sizeof(*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 (!access_ok(VERIFY_WRITE, request, sizeof(*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 (!access_ok(VERIFY_WRITE, request, sizeof(*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 (!access_ok(VERIFY_WRITE, request, sizeof(*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 /* __OS_HAS_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 (!access_ok(VERIFY_WRITE, request, sizeof(*request)) 901 || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)) 902 || __get_user(x, &argp->size) 903 || __put_user(x, &request->size)) 904 return -EFAULT; 905 906 err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request); 907 if (err) 908 return err; 909 910 /* XXX not sure about the handle conversion here... */ 911 if (__get_user(x, &request->handle) 912 || __put_user(x >> PAGE_SHIFT, &argp->handle)) 913 return -EFAULT; 914 915 return 0; 916 } 917 918 static int compat_drm_sg_free(struct file *file, unsigned int cmd, 919 unsigned long arg) 920 { 921 drm_scatter_gather32_t __user *argp = (void __user *)arg; 922 struct drm_scatter_gather __user *request; 923 unsigned long x; 924 925 request = compat_alloc_user_space(sizeof(*request)); 926 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) 927 || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)) 928 || __get_user(x, &argp->handle) 929 || __put_user(x << PAGE_SHIFT, &request->handle)) 930 return -EFAULT; 931 932 return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request); 933 } 934 935 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 936 typedef struct drm_update_draw32 { 937 drm_drawable_t handle; 938 unsigned int type; 939 unsigned int num; 940 /* 64-bit version has a 32-bit pad here */ 941 u64 data; /**< Pointer */ 942 } __attribute__((packed)) drm_update_draw32_t; 943 944 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 945 unsigned long arg) 946 { 947 drm_update_draw32_t update32; 948 struct drm_update_draw __user *request; 949 int err; 950 951 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32))) 952 return -EFAULT; 953 954 request = compat_alloc_user_space(sizeof(*request)); 955 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) || 956 __put_user(update32.handle, &request->handle) || 957 __put_user(update32.type, &request->type) || 958 __put_user(update32.num, &request->num) || 959 __put_user(update32.data, &request->data)) 960 return -EFAULT; 961 962 err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request); 963 return err; 964 } 965 #endif 966 967 struct drm_wait_vblank_request32 { 968 enum drm_vblank_seq_type type; 969 unsigned int sequence; 970 u32 signal; 971 }; 972 973 struct drm_wait_vblank_reply32 { 974 enum drm_vblank_seq_type type; 975 unsigned int sequence; 976 s32 tval_sec; 977 s32 tval_usec; 978 }; 979 980 typedef union drm_wait_vblank32 { 981 struct drm_wait_vblank_request32 request; 982 struct drm_wait_vblank_reply32 reply; 983 } drm_wait_vblank32_t; 984 985 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, 986 unsigned long arg) 987 { 988 drm_wait_vblank32_t __user *argp = (void __user *)arg; 989 drm_wait_vblank32_t req32; 990 union drm_wait_vblank __user *request; 991 int err; 992 993 if (copy_from_user(&req32, argp, sizeof(req32))) 994 return -EFAULT; 995 996 request = compat_alloc_user_space(sizeof(*request)); 997 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) 998 || __put_user(req32.request.type, &request->request.type) 999 || __put_user(req32.request.sequence, &request->request.sequence) 1000 || __put_user(req32.request.signal, &request->request.signal)) 1001 return -EFAULT; 1002 1003 err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request); 1004 if (err) 1005 return err; 1006 1007 if (__get_user(req32.reply.type, &request->reply.type) 1008 || __get_user(req32.reply.sequence, &request->reply.sequence) 1009 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec) 1010 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec)) 1011 return -EFAULT; 1012 1013 if (copy_to_user(argp, &req32, sizeof(req32))) 1014 return -EFAULT; 1015 1016 return 0; 1017 } 1018 1019 static drm_ioctl_compat_t *drm_compat_ioctls[] = { 1020 [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version, 1021 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique, 1022 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap, 1023 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient, 1024 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats, 1025 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique, 1026 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap, 1027 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs, 1028 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs, 1029 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs, 1030 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs, 1031 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs, 1032 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap, 1033 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx, 1034 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx, 1035 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx, 1036 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma, 1037 #if __OS_HAS_AGP 1038 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable, 1039 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info, 1040 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc, 1041 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free, 1042 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind, 1043 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind, 1044 #endif 1045 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc, 1046 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free, 1047 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 1048 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw, 1049 #endif 1050 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank, 1051 }; 1052 1053 /** 1054 * Called whenever a 32-bit process running under a 64-bit kernel 1055 * performs an ioctl on /dev/drm. 1056 * 1057 * \param file_priv DRM file private. 1058 * \param cmd command. 1059 * \param arg user argument. 1060 * \return zero on success or negative number on failure. 1061 */ 1062 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1063 { 1064 unsigned int nr = DRM_IOCTL_NR(cmd); 1065 drm_ioctl_compat_t *fn; 1066 int ret; 1067 1068 /* Assume that ioctls without an explicit compat routine will just 1069 * work. This may not always be a good assumption, but it's better 1070 * than always failing. 1071 */ 1072 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 1073 return drm_ioctl(filp, cmd, arg); 1074 1075 fn = drm_compat_ioctls[nr]; 1076 1077 if (fn != NULL) 1078 ret = (*fn) (filp, cmd, arg); 1079 else 1080 ret = drm_ioctl(filp, cmd, arg); 1081 1082 return ret; 1083 } 1084 1085 EXPORT_SYMBOL(drm_compat_ioctl); 1086