1 /** 2 * \file drm_ioc32.c 3 * 4 * 32-bit ioctl compatibility routines for the DRM. 5 * 6 * \author Paul Mackerras <paulus@samba.org> 7 * 8 * Copyright (C) Paul Mackerras 2005. 9 * All Rights Reserved. 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a 12 * copy of this software and associated documentation files (the "Software"), 13 * to deal in the Software without restriction, including without limitation 14 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 15 * and/or sell copies of the Software, and to permit persons to whom the 16 * Software is furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice (including the next 19 * paragraph) shall be included in all copies or substantial portions of the 20 * Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 28 * IN THE SOFTWARE. 29 */ 30 #include <linux/compat.h> 31 #include <linux/ratelimit.h> 32 #include <linux/export.h> 33 34 #include <drm/drmP.h> 35 36 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) 37 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) 38 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) 39 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) 40 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) 41 42 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) 43 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) 44 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) 45 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) 46 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) 47 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) 48 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) 49 50 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) 51 52 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) 53 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) 54 55 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) 56 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) 57 58 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) 59 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) 60 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) 61 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) 62 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) 63 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) 64 65 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) 66 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) 67 68 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) 69 70 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) 71 72 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t) 73 74 typedef struct drm_version_32 { 75 int version_major; /**< Major version */ 76 int version_minor; /**< Minor version */ 77 int version_patchlevel; /**< Patch level */ 78 u32 name_len; /**< Length of name buffer */ 79 u32 name; /**< Name of driver */ 80 u32 date_len; /**< Length of date buffer */ 81 u32 date; /**< User-space buffer to hold date */ 82 u32 desc_len; /**< Length of desc buffer */ 83 u32 desc; /**< User-space buffer to hold desc */ 84 } drm_version32_t; 85 86 static int compat_drm_version(struct file *file, unsigned int cmd, 87 unsigned long arg) 88 { 89 drm_version32_t v32; 90 struct drm_version __user *version; 91 int err; 92 93 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) 94 return -EFAULT; 95 96 version = compat_alloc_user_space(sizeof(*version)); 97 if (!version) 98 return -EFAULT; 99 if (__put_user(v32.name_len, &version->name_len) 100 || __put_user((void __user *)(unsigned long)v32.name, 101 &version->name) 102 || __put_user(v32.date_len, &version->date_len) 103 || __put_user((void __user *)(unsigned long)v32.date, 104 &version->date) 105 || __put_user(v32.desc_len, &version->desc_len) 106 || __put_user((void __user *)(unsigned long)v32.desc, 107 &version->desc)) 108 return -EFAULT; 109 110 err = drm_ioctl(file, 111 DRM_IOCTL_VERSION, (unsigned long)version); 112 if (err) 113 return err; 114 115 if (__get_user(v32.version_major, &version->version_major) 116 || __get_user(v32.version_minor, &version->version_minor) 117 || __get_user(v32.version_patchlevel, &version->version_patchlevel) 118 || __get_user(v32.name_len, &version->name_len) 119 || __get_user(v32.date_len, &version->date_len) 120 || __get_user(v32.desc_len, &version->desc_len)) 121 return -EFAULT; 122 123 if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) 124 return -EFAULT; 125 return 0; 126 } 127 128 typedef struct drm_unique32 { 129 u32 unique_len; /**< Length of unique */ 130 u32 unique; /**< Unique name for driver instantiation */ 131 } drm_unique32_t; 132 133 static int compat_drm_getunique(struct file *file, unsigned int cmd, 134 unsigned long arg) 135 { 136 drm_unique32_t uq32; 137 struct drm_unique __user *u; 138 int err; 139 140 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 141 return -EFAULT; 142 143 u = compat_alloc_user_space(sizeof(*u)); 144 if (!u) 145 return -EFAULT; 146 if (__put_user(uq32.unique_len, &u->unique_len) 147 || __put_user((void __user *)(unsigned long)uq32.unique, 148 &u->unique)) 149 return -EFAULT; 150 151 err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u); 152 if (err) 153 return err; 154 155 if (__get_user(uq32.unique_len, &u->unique_len)) 156 return -EFAULT; 157 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) 158 return -EFAULT; 159 return 0; 160 } 161 162 static int compat_drm_setunique(struct file *file, unsigned int cmd, 163 unsigned long arg) 164 { 165 drm_unique32_t uq32; 166 struct drm_unique __user *u; 167 168 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 169 return -EFAULT; 170 171 u = compat_alloc_user_space(sizeof(*u)); 172 if (!u) 173 return -EFAULT; 174 if (__put_user(uq32.unique_len, &u->unique_len) 175 || __put_user((void __user *)(unsigned long)uq32.unique, 176 &u->unique)) 177 return -EFAULT; 178 179 return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u); 180 } 181 182 typedef struct drm_map32 { 183 u32 offset; /**< Requested physical address (0 for SAREA)*/ 184 u32 size; /**< Requested physical size (bytes) */ 185 enum drm_map_type type; /**< Type of memory to map */ 186 enum drm_map_flags flags; /**< Flags */ 187 u32 handle; /**< User-space: "Handle" to pass to mmap() */ 188 int mtrr; /**< MTRR slot used */ 189 } drm_map32_t; 190 191 static int compat_drm_getmap(struct file *file, unsigned int cmd, 192 unsigned long arg) 193 { 194 drm_map32_t __user *argp = (void __user *)arg; 195 drm_map32_t m32; 196 struct drm_map __user *map; 197 int idx, err; 198 void *handle; 199 200 if (get_user(idx, &argp->offset)) 201 return -EFAULT; 202 203 map = compat_alloc_user_space(sizeof(*map)); 204 if (!map) 205 return -EFAULT; 206 if (__put_user(idx, &map->offset)) 207 return -EFAULT; 208 209 err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map); 210 if (err) 211 return err; 212 213 if (__get_user(m32.offset, &map->offset) 214 || __get_user(m32.size, &map->size) 215 || __get_user(m32.type, &map->type) 216 || __get_user(m32.flags, &map->flags) 217 || __get_user(handle, &map->handle) 218 || __get_user(m32.mtrr, &map->mtrr)) 219 return -EFAULT; 220 221 m32.handle = (unsigned long)handle; 222 if (copy_to_user(argp, &m32, sizeof(m32))) 223 return -EFAULT; 224 return 0; 225 226 } 227 228 static int compat_drm_addmap(struct file *file, unsigned int cmd, 229 unsigned long arg) 230 { 231 drm_map32_t __user *argp = (void __user *)arg; 232 drm_map32_t m32; 233 struct drm_map __user *map; 234 int err; 235 void *handle; 236 237 if (copy_from_user(&m32, argp, sizeof(m32))) 238 return -EFAULT; 239 240 map = compat_alloc_user_space(sizeof(*map)); 241 if (!map) 242 return -EFAULT; 243 if (__put_user(m32.offset, &map->offset) 244 || __put_user(m32.size, &map->size) 245 || __put_user(m32.type, &map->type) 246 || __put_user(m32.flags, &map->flags)) 247 return -EFAULT; 248 249 err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map); 250 if (err) 251 return err; 252 253 if (__get_user(m32.offset, &map->offset) 254 || __get_user(m32.mtrr, &map->mtrr) 255 || __get_user(handle, &map->handle)) 256 return -EFAULT; 257 258 m32.handle = (unsigned long)handle; 259 if (m32.handle != (unsigned long)handle) 260 printk_ratelimited(KERN_ERR "compat_drm_addmap truncated handle" 261 " %p for type %d offset %x\n", 262 handle, m32.type, m32.offset); 263 264 if (copy_to_user(argp, &m32, sizeof(m32))) 265 return -EFAULT; 266 267 return 0; 268 } 269 270 static int compat_drm_rmmap(struct file *file, unsigned int cmd, 271 unsigned long arg) 272 { 273 drm_map32_t __user *argp = (void __user *)arg; 274 struct drm_map __user *map; 275 u32 handle; 276 277 if (get_user(handle, &argp->handle)) 278 return -EFAULT; 279 280 map = compat_alloc_user_space(sizeof(*map)); 281 if (!map) 282 return -EFAULT; 283 if (__put_user((void *)(unsigned long)handle, &map->handle)) 284 return -EFAULT; 285 286 return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map); 287 } 288 289 typedef struct drm_client32 { 290 int idx; /**< Which client desired? */ 291 int auth; /**< Is client authenticated? */ 292 u32 pid; /**< Process ID */ 293 u32 uid; /**< User ID */ 294 u32 magic; /**< Magic */ 295 u32 iocs; /**< Ioctl count */ 296 } drm_client32_t; 297 298 static int compat_drm_getclient(struct file *file, unsigned int cmd, 299 unsigned long arg) 300 { 301 drm_client32_t c32; 302 drm_client32_t __user *argp = (void __user *)arg; 303 struct drm_client __user *client; 304 int idx, err; 305 306 if (get_user(idx, &argp->idx)) 307 return -EFAULT; 308 309 client = compat_alloc_user_space(sizeof(*client)); 310 if (!client) 311 return -EFAULT; 312 if (__put_user(idx, &client->idx)) 313 return -EFAULT; 314 315 err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client); 316 if (err) 317 return err; 318 319 if (__get_user(c32.idx, &client->idx) 320 || __get_user(c32.auth, &client->auth) 321 || __get_user(c32.pid, &client->pid) 322 || __get_user(c32.uid, &client->uid) 323 || __get_user(c32.magic, &client->magic) 324 || __get_user(c32.iocs, &client->iocs)) 325 return -EFAULT; 326 327 if (copy_to_user(argp, &c32, sizeof(c32))) 328 return -EFAULT; 329 return 0; 330 } 331 332 typedef struct drm_stats32 { 333 u32 count; 334 struct { 335 u32 value; 336 enum drm_stat_type type; 337 } data[15]; 338 } drm_stats32_t; 339 340 static int compat_drm_getstats(struct file *file, unsigned int cmd, 341 unsigned long arg) 342 { 343 drm_stats32_t s32; 344 drm_stats32_t __user *argp = (void __user *)arg; 345 struct drm_stats __user *stats; 346 int i, err; 347 348 memset(&s32, 0, sizeof(drm_stats32_t)); 349 stats = compat_alloc_user_space(sizeof(*stats)); 350 if (!stats) 351 return -EFAULT; 352 353 err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats); 354 if (err) 355 return err; 356 357 if (__get_user(s32.count, &stats->count)) 358 return -EFAULT; 359 for (i = 0; i < 15; ++i) 360 if (__get_user(s32.data[i].value, &stats->data[i].value) 361 || __get_user(s32.data[i].type, &stats->data[i].type)) 362 return -EFAULT; 363 364 if (copy_to_user(argp, &s32, sizeof(s32))) 365 return -EFAULT; 366 return 0; 367 } 368 369 typedef struct drm_buf_desc32 { 370 int count; /**< Number of buffers of this size */ 371 int size; /**< Size in bytes */ 372 int low_mark; /**< Low water mark */ 373 int high_mark; /**< High water mark */ 374 int flags; 375 u32 agp_start; /**< Start address in the AGP aperture */ 376 } drm_buf_desc32_t; 377 378 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 379 unsigned long arg) 380 { 381 drm_buf_desc32_t __user *argp = (void __user *)arg; 382 struct drm_buf_desc __user *buf; 383 int err; 384 unsigned long agp_start; 385 386 buf = compat_alloc_user_space(sizeof(*buf)); 387 if (!buf || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))) 388 return -EFAULT; 389 390 if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start)) 391 || __get_user(agp_start, &argp->agp_start) 392 || __put_user(agp_start, &buf->agp_start)) 393 return -EFAULT; 394 395 err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf); 396 if (err) 397 return err; 398 399 if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start)) 400 || __get_user(agp_start, &buf->agp_start) 401 || __put_user(agp_start, &argp->agp_start)) 402 return -EFAULT; 403 404 return 0; 405 } 406 407 static int compat_drm_markbufs(struct file *file, unsigned int cmd, 408 unsigned long arg) 409 { 410 drm_buf_desc32_t b32; 411 drm_buf_desc32_t __user *argp = (void __user *)arg; 412 struct drm_buf_desc __user *buf; 413 414 if (copy_from_user(&b32, argp, sizeof(b32))) 415 return -EFAULT; 416 417 buf = compat_alloc_user_space(sizeof(*buf)); 418 if (!buf) 419 return -EFAULT; 420 421 if (__put_user(b32.size, &buf->size) 422 || __put_user(b32.low_mark, &buf->low_mark) 423 || __put_user(b32.high_mark, &buf->high_mark)) 424 return -EFAULT; 425 426 return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf); 427 } 428 429 typedef struct drm_buf_info32 { 430 int count; /**< Entries in list */ 431 u32 list; 432 } drm_buf_info32_t; 433 434 static int compat_drm_infobufs(struct file *file, unsigned int cmd, 435 unsigned long arg) 436 { 437 drm_buf_info32_t req32; 438 drm_buf_info32_t __user *argp = (void __user *)arg; 439 drm_buf_desc32_t __user *to; 440 struct drm_buf_info __user *request; 441 struct drm_buf_desc __user *list; 442 size_t nbytes; 443 int i, err; 444 int count, actual; 445 446 if (copy_from_user(&req32, argp, sizeof(req32))) 447 return -EFAULT; 448 449 count = req32.count; 450 to = (drm_buf_desc32_t __user *) (unsigned long)req32.list; 451 if (count < 0) 452 count = 0; 453 if (count > 0 454 && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t))) 455 return -EFAULT; 456 457 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc); 458 request = compat_alloc_user_space(nbytes); 459 if (!request) 460 return -EFAULT; 461 list = (struct drm_buf_desc *) (request + 1); 462 463 if (__put_user(count, &request->count) 464 || __put_user(list, &request->list)) 465 return -EFAULT; 466 467 err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request); 468 if (err) 469 return err; 470 471 if (__get_user(actual, &request->count)) 472 return -EFAULT; 473 if (count >= actual) 474 for (i = 0; i < actual; ++i) 475 if (__copy_in_user(&to[i], &list[i], 476 offsetof(struct drm_buf_desc, flags))) 477 return -EFAULT; 478 479 if (__put_user(actual, &argp->count)) 480 return -EFAULT; 481 482 return 0; 483 } 484 485 typedef struct drm_buf_pub32 { 486 int idx; /**< Index into the master buffer list */ 487 int total; /**< Buffer size */ 488 int used; /**< Amount of buffer in use (for DMA) */ 489 u32 address; /**< Address of buffer */ 490 } drm_buf_pub32_t; 491 492 typedef struct drm_buf_map32 { 493 int count; /**< Length of the buffer list */ 494 u32 virtual; /**< Mmap'd area in user-virtual */ 495 u32 list; /**< Buffer information */ 496 } drm_buf_map32_t; 497 498 static int compat_drm_mapbufs(struct file *file, unsigned int cmd, 499 unsigned long arg) 500 { 501 drm_buf_map32_t __user *argp = (void __user *)arg; 502 drm_buf_map32_t req32; 503 drm_buf_pub32_t __user *list32; 504 struct drm_buf_map __user *request; 505 struct drm_buf_pub __user *list; 506 int i, err; 507 int count, actual; 508 size_t nbytes; 509 void __user *addr; 510 511 if (copy_from_user(&req32, argp, sizeof(req32))) 512 return -EFAULT; 513 count = req32.count; 514 list32 = (void __user *)(unsigned long)req32.list; 515 516 if (count < 0) 517 return -EINVAL; 518 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub); 519 request = compat_alloc_user_space(nbytes); 520 if (!request) 521 return -EFAULT; 522 list = (struct drm_buf_pub *) (request + 1); 523 524 if (__put_user(count, &request->count) 525 || __put_user(list, &request->list)) 526 return -EFAULT; 527 528 err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request); 529 if (err) 530 return err; 531 532 if (__get_user(actual, &request->count)) 533 return -EFAULT; 534 if (count >= actual) 535 for (i = 0; i < actual; ++i) 536 if (__copy_in_user(&list32[i], &list[i], 537 offsetof(struct drm_buf_pub, address)) 538 || __get_user(addr, &list[i].address) 539 || __put_user((unsigned long)addr, 540 &list32[i].address)) 541 return -EFAULT; 542 543 if (__put_user(actual, &argp->count) 544 || __get_user(addr, &request->virtual) 545 || __put_user((unsigned long)addr, &argp->virtual)) 546 return -EFAULT; 547 548 return 0; 549 } 550 551 typedef struct drm_buf_free32 { 552 int count; 553 u32 list; 554 } drm_buf_free32_t; 555 556 static int compat_drm_freebufs(struct file *file, unsigned int cmd, 557 unsigned long arg) 558 { 559 drm_buf_free32_t req32; 560 struct drm_buf_free __user *request; 561 drm_buf_free32_t __user *argp = (void __user *)arg; 562 563 if (copy_from_user(&req32, argp, sizeof(req32))) 564 return -EFAULT; 565 566 request = compat_alloc_user_space(sizeof(*request)); 567 if (!request) 568 return -EFAULT; 569 if (__put_user(req32.count, &request->count) 570 || __put_user((int __user *)(unsigned long)req32.list, 571 &request->list)) 572 return -EFAULT; 573 574 return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request); 575 } 576 577 typedef struct drm_ctx_priv_map32 { 578 unsigned int ctx_id; /**< Context requesting private mapping */ 579 u32 handle; /**< Handle of map */ 580 } drm_ctx_priv_map32_t; 581 582 static int compat_drm_setsareactx(struct file *file, unsigned int cmd, 583 unsigned long arg) 584 { 585 drm_ctx_priv_map32_t req32; 586 struct drm_ctx_priv_map __user *request; 587 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 588 589 if (copy_from_user(&req32, argp, sizeof(req32))) 590 return -EFAULT; 591 592 request = compat_alloc_user_space(sizeof(*request)); 593 if (!request) 594 return -EFAULT; 595 if (__put_user(req32.ctx_id, &request->ctx_id) 596 || __put_user((void *)(unsigned long)req32.handle, 597 &request->handle)) 598 return -EFAULT; 599 600 return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request); 601 } 602 603 static int compat_drm_getsareactx(struct file *file, unsigned int cmd, 604 unsigned long arg) 605 { 606 struct drm_ctx_priv_map __user *request; 607 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 608 int err; 609 unsigned int ctx_id; 610 void *handle; 611 612 if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp)) 613 || __get_user(ctx_id, &argp->ctx_id)) 614 return -EFAULT; 615 616 request = compat_alloc_user_space(sizeof(*request)); 617 if (!request) 618 return -EFAULT; 619 if (__put_user(ctx_id, &request->ctx_id)) 620 return -EFAULT; 621 622 err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request); 623 if (err) 624 return err; 625 626 if (__get_user(handle, &request->handle) 627 || __put_user((unsigned long)handle, &argp->handle)) 628 return -EFAULT; 629 630 return 0; 631 } 632 633 typedef struct drm_ctx_res32 { 634 int count; 635 u32 contexts; 636 } drm_ctx_res32_t; 637 638 static int compat_drm_resctx(struct file *file, unsigned int cmd, 639 unsigned long arg) 640 { 641 drm_ctx_res32_t __user *argp = (void __user *)arg; 642 drm_ctx_res32_t res32; 643 struct drm_ctx_res __user *res; 644 int err; 645 646 if (copy_from_user(&res32, argp, sizeof(res32))) 647 return -EFAULT; 648 649 res = compat_alloc_user_space(sizeof(*res)); 650 if (!res) 651 return -EFAULT; 652 if (__put_user(res32.count, &res->count) 653 || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts, 654 &res->contexts)) 655 return -EFAULT; 656 657 err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res); 658 if (err) 659 return err; 660 661 if (__get_user(res32.count, &res->count) 662 || __put_user(res32.count, &argp->count)) 663 return -EFAULT; 664 665 return 0; 666 } 667 668 typedef struct drm_dma32 { 669 int context; /**< Context handle */ 670 int send_count; /**< Number of buffers to send */ 671 u32 send_indices; /**< List of handles to buffers */ 672 u32 send_sizes; /**< Lengths of data to send */ 673 enum drm_dma_flags flags; /**< Flags */ 674 int request_count; /**< Number of buffers requested */ 675 int request_size; /**< Desired size for buffers */ 676 u32 request_indices; /**< Buffer information */ 677 u32 request_sizes; 678 int granted_count; /**< Number of buffers granted */ 679 } drm_dma32_t; 680 681 static int compat_drm_dma(struct file *file, unsigned int cmd, 682 unsigned long arg) 683 { 684 drm_dma32_t d32; 685 drm_dma32_t __user *argp = (void __user *)arg; 686 struct drm_dma __user *d; 687 int err; 688 689 if (copy_from_user(&d32, argp, sizeof(d32))) 690 return -EFAULT; 691 692 d = compat_alloc_user_space(sizeof(*d)); 693 if (!d) 694 return -EFAULT; 695 696 if (__put_user(d32.context, &d->context) 697 || __put_user(d32.send_count, &d->send_count) 698 || __put_user((int __user *)(unsigned long)d32.send_indices, 699 &d->send_indices) 700 || __put_user((int __user *)(unsigned long)d32.send_sizes, 701 &d->send_sizes) 702 || __put_user(d32.flags, &d->flags) 703 || __put_user(d32.request_count, &d->request_count) 704 || __put_user((int __user *)(unsigned long)d32.request_indices, 705 &d->request_indices) 706 || __put_user((int __user *)(unsigned long)d32.request_sizes, 707 &d->request_sizes)) 708 return -EFAULT; 709 710 err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d); 711 if (err) 712 return err; 713 714 if (__get_user(d32.request_size, &d->request_size) 715 || __get_user(d32.granted_count, &d->granted_count) 716 || __put_user(d32.request_size, &argp->request_size) 717 || __put_user(d32.granted_count, &argp->granted_count)) 718 return -EFAULT; 719 720 return 0; 721 } 722 723 #if IS_ENABLED(CONFIG_AGP) 724 typedef struct drm_agp_mode32 { 725 u32 mode; /**< AGP mode */ 726 } drm_agp_mode32_t; 727 728 static int compat_drm_agp_enable(struct file *file, unsigned int cmd, 729 unsigned long arg) 730 { 731 drm_agp_mode32_t __user *argp = (void __user *)arg; 732 drm_agp_mode32_t m32; 733 struct drm_agp_mode __user *mode; 734 735 if (get_user(m32.mode, &argp->mode)) 736 return -EFAULT; 737 738 mode = compat_alloc_user_space(sizeof(*mode)); 739 if (put_user(m32.mode, &mode->mode)) 740 return -EFAULT; 741 742 return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode); 743 } 744 745 typedef struct drm_agp_info32 { 746 int agp_version_major; 747 int agp_version_minor; 748 u32 mode; 749 u32 aperture_base; /* physical address */ 750 u32 aperture_size; /* bytes */ 751 u32 memory_allowed; /* bytes */ 752 u32 memory_used; 753 754 /* PCI information */ 755 unsigned short id_vendor; 756 unsigned short id_device; 757 } drm_agp_info32_t; 758 759 static int compat_drm_agp_info(struct file *file, unsigned int cmd, 760 unsigned long arg) 761 { 762 drm_agp_info32_t __user *argp = (void __user *)arg; 763 drm_agp_info32_t i32; 764 struct drm_agp_info __user *info; 765 int err; 766 767 info = compat_alloc_user_space(sizeof(*info)); 768 if (!info) 769 return -EFAULT; 770 771 err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info); 772 if (err) 773 return err; 774 775 if (__get_user(i32.agp_version_major, &info->agp_version_major) 776 || __get_user(i32.agp_version_minor, &info->agp_version_minor) 777 || __get_user(i32.mode, &info->mode) 778 || __get_user(i32.aperture_base, &info->aperture_base) 779 || __get_user(i32.aperture_size, &info->aperture_size) 780 || __get_user(i32.memory_allowed, &info->memory_allowed) 781 || __get_user(i32.memory_used, &info->memory_used) 782 || __get_user(i32.id_vendor, &info->id_vendor) 783 || __get_user(i32.id_device, &info->id_device)) 784 return -EFAULT; 785 786 if (copy_to_user(argp, &i32, sizeof(i32))) 787 return -EFAULT; 788 789 return 0; 790 } 791 792 typedef struct drm_agp_buffer32 { 793 u32 size; /**< In bytes -- will round to page boundary */ 794 u32 handle; /**< Used for binding / unbinding */ 795 u32 type; /**< Type of memory to allocate */ 796 u32 physical; /**< Physical used by i810 */ 797 } drm_agp_buffer32_t; 798 799 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd, 800 unsigned long arg) 801 { 802 drm_agp_buffer32_t __user *argp = (void __user *)arg; 803 drm_agp_buffer32_t req32; 804 struct drm_agp_buffer __user *request; 805 int err; 806 807 if (copy_from_user(&req32, argp, sizeof(req32))) 808 return -EFAULT; 809 810 request = compat_alloc_user_space(sizeof(*request)); 811 if (!request 812 || __put_user(req32.size, &request->size) 813 || __put_user(req32.type, &request->type)) 814 return -EFAULT; 815 816 err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request); 817 if (err) 818 return err; 819 820 if (__get_user(req32.handle, &request->handle) 821 || __get_user(req32.physical, &request->physical) 822 || copy_to_user(argp, &req32, sizeof(req32))) { 823 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request); 824 return -EFAULT; 825 } 826 827 return 0; 828 } 829 830 static int compat_drm_agp_free(struct file *file, unsigned int cmd, 831 unsigned long arg) 832 { 833 drm_agp_buffer32_t __user *argp = (void __user *)arg; 834 struct drm_agp_buffer __user *request; 835 u32 handle; 836 837 request = compat_alloc_user_space(sizeof(*request)); 838 if (!request 839 || get_user(handle, &argp->handle) 840 || __put_user(handle, &request->handle)) 841 return -EFAULT; 842 843 return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request); 844 } 845 846 typedef struct drm_agp_binding32 { 847 u32 handle; /**< From drm_agp_buffer */ 848 u32 offset; /**< In bytes -- will round to page boundary */ 849 } drm_agp_binding32_t; 850 851 static int compat_drm_agp_bind(struct file *file, unsigned int cmd, 852 unsigned long arg) 853 { 854 drm_agp_binding32_t __user *argp = (void __user *)arg; 855 drm_agp_binding32_t req32; 856 struct drm_agp_binding __user *request; 857 858 if (copy_from_user(&req32, argp, sizeof(req32))) 859 return -EFAULT; 860 861 request = compat_alloc_user_space(sizeof(*request)); 862 if (!request 863 || __put_user(req32.handle, &request->handle) 864 || __put_user(req32.offset, &request->offset)) 865 return -EFAULT; 866 867 return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request); 868 } 869 870 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd, 871 unsigned long arg) 872 { 873 drm_agp_binding32_t __user *argp = (void __user *)arg; 874 struct drm_agp_binding __user *request; 875 u32 handle; 876 877 request = compat_alloc_user_space(sizeof(*request)); 878 if (!request 879 || get_user(handle, &argp->handle) 880 || __put_user(handle, &request->handle)) 881 return -EFAULT; 882 883 return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request); 884 } 885 #endif /* CONFIG_AGP */ 886 887 typedef struct drm_scatter_gather32 { 888 u32 size; /**< In bytes -- will round to page boundary */ 889 u32 handle; /**< Used for mapping / unmapping */ 890 } drm_scatter_gather32_t; 891 892 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd, 893 unsigned long arg) 894 { 895 drm_scatter_gather32_t __user *argp = (void __user *)arg; 896 struct drm_scatter_gather __user *request; 897 int err; 898 unsigned long x; 899 900 request = compat_alloc_user_space(sizeof(*request)); 901 if (!request || !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 (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)) 927 || __get_user(x, &argp->handle) 928 || __put_user(x << PAGE_SHIFT, &request->handle)) 929 return -EFAULT; 930 931 return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request); 932 } 933 934 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 935 typedef struct drm_update_draw32 { 936 drm_drawable_t handle; 937 unsigned int type; 938 unsigned int num; 939 /* 64-bit version has a 32-bit pad here */ 940 u64 data; /**< Pointer */ 941 } __attribute__((packed)) drm_update_draw32_t; 942 943 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 944 unsigned long arg) 945 { 946 drm_update_draw32_t update32; 947 struct drm_update_draw __user *request; 948 int err; 949 950 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32))) 951 return -EFAULT; 952 953 request = compat_alloc_user_space(sizeof(*request)); 954 if (!request || 955 __put_user(update32.handle, &request->handle) || 956 __put_user(update32.type, &request->type) || 957 __put_user(update32.num, &request->num) || 958 __put_user(update32.data, &request->data)) 959 return -EFAULT; 960 961 err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request); 962 return err; 963 } 964 #endif 965 966 struct drm_wait_vblank_request32 { 967 enum drm_vblank_seq_type type; 968 unsigned int sequence; 969 u32 signal; 970 }; 971 972 struct drm_wait_vblank_reply32 { 973 enum drm_vblank_seq_type type; 974 unsigned int sequence; 975 s32 tval_sec; 976 s32 tval_usec; 977 }; 978 979 typedef union drm_wait_vblank32 { 980 struct drm_wait_vblank_request32 request; 981 struct drm_wait_vblank_reply32 reply; 982 } drm_wait_vblank32_t; 983 984 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, 985 unsigned long arg) 986 { 987 drm_wait_vblank32_t __user *argp = (void __user *)arg; 988 drm_wait_vblank32_t req32; 989 union drm_wait_vblank __user *request; 990 int err; 991 992 if (copy_from_user(&req32, argp, sizeof(req32))) 993 return -EFAULT; 994 995 request = compat_alloc_user_space(sizeof(*request)); 996 if (!request 997 || __put_user(req32.request.type, &request->request.type) 998 || __put_user(req32.request.sequence, &request->request.sequence) 999 || __put_user(req32.request.signal, &request->request.signal)) 1000 return -EFAULT; 1001 1002 err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request); 1003 if (err) 1004 return err; 1005 1006 if (__get_user(req32.reply.type, &request->reply.type) 1007 || __get_user(req32.reply.sequence, &request->reply.sequence) 1008 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec) 1009 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec)) 1010 return -EFAULT; 1011 1012 if (copy_to_user(argp, &req32, sizeof(req32))) 1013 return -EFAULT; 1014 1015 return 0; 1016 } 1017 1018 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 1019 typedef struct drm_mode_fb_cmd232 { 1020 u32 fb_id; 1021 u32 width; 1022 u32 height; 1023 u32 pixel_format; 1024 u32 flags; 1025 u32 handles[4]; 1026 u32 pitches[4]; 1027 u32 offsets[4]; 1028 u64 modifier[4]; 1029 } __attribute__((packed)) drm_mode_fb_cmd232_t; 1030 1031 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, 1032 unsigned long arg) 1033 { 1034 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; 1035 struct drm_mode_fb_cmd232 req32; 1036 struct drm_mode_fb_cmd2 __user *req64; 1037 int i; 1038 int err; 1039 1040 if (copy_from_user(&req32, argp, sizeof(req32))) 1041 return -EFAULT; 1042 1043 req64 = compat_alloc_user_space(sizeof(*req64)); 1044 1045 if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64)) 1046 || __put_user(req32.width, &req64->width) 1047 || __put_user(req32.height, &req64->height) 1048 || __put_user(req32.pixel_format, &req64->pixel_format) 1049 || __put_user(req32.flags, &req64->flags)) 1050 return -EFAULT; 1051 1052 for (i = 0; i < 4; i++) { 1053 if (__put_user(req32.handles[i], &req64->handles[i])) 1054 return -EFAULT; 1055 if (__put_user(req32.pitches[i], &req64->pitches[i])) 1056 return -EFAULT; 1057 if (__put_user(req32.offsets[i], &req64->offsets[i])) 1058 return -EFAULT; 1059 if (__put_user(req32.modifier[i], &req64->modifier[i])) 1060 return -EFAULT; 1061 } 1062 1063 err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64); 1064 if (err) 1065 return err; 1066 1067 if (__get_user(req32.fb_id, &req64->fb_id)) 1068 return -EFAULT; 1069 1070 if (copy_to_user(argp, &req32, sizeof(req32))) 1071 return -EFAULT; 1072 1073 return 0; 1074 } 1075 #endif 1076 1077 static drm_ioctl_compat_t *drm_compat_ioctls[] = { 1078 [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version, 1079 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique, 1080 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap, 1081 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient, 1082 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats, 1083 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique, 1084 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap, 1085 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs, 1086 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs, 1087 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs, 1088 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs, 1089 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs, 1090 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap, 1091 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx, 1092 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx, 1093 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx, 1094 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma, 1095 #if IS_ENABLED(CONFIG_AGP) 1096 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable, 1097 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info, 1098 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc, 1099 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free, 1100 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind, 1101 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind, 1102 #endif 1103 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc, 1104 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free, 1105 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 1106 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw, 1107 #endif 1108 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank, 1109 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 1110 [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2, 1111 #endif 1112 }; 1113 1114 /** 1115 * Called whenever a 32-bit process running under a 64-bit kernel 1116 * performs an ioctl on /dev/drm. 1117 * 1118 * \param file_priv DRM file private. 1119 * \param cmd command. 1120 * \param arg user argument. 1121 * \return zero on success or negative number on failure. 1122 */ 1123 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1124 { 1125 unsigned int nr = DRM_IOCTL_NR(cmd); 1126 drm_ioctl_compat_t *fn; 1127 int ret; 1128 1129 /* Assume that ioctls without an explicit compat routine will just 1130 * work. This may not always be a good assumption, but it's better 1131 * than always failing. 1132 */ 1133 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 1134 return drm_ioctl(filp, cmd, arg); 1135 1136 fn = drm_compat_ioctls[nr]; 1137 1138 if (fn != NULL) 1139 ret = (*fn) (filp, cmd, arg); 1140 else 1141 ret = drm_ioctl(filp, cmd, arg); 1142 1143 return ret; 1144 } 1145 1146 EXPORT_SYMBOL(drm_compat_ioctl); 1147