1 /* 2 * \file drm_ioc32.c 3 * 4 * 32-bit ioctl compatibility routines for the DRM. 5 * 6 * \author Paul Mackerras <paulus@samba.org> 7 * 8 * Copyright (C) Paul Mackerras 2005. 9 * All Rights Reserved. 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a 12 * copy of this software and associated documentation files (the "Software"), 13 * to deal in the Software without restriction, including without limitation 14 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 15 * and/or sell copies of the Software, and to permit persons to whom the 16 * Software is furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice (including the next 19 * paragraph) shall be included in all copies or substantial portions of the 20 * Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 28 * IN THE SOFTWARE. 29 */ 30 #include <linux/compat.h> 31 #include <linux/ratelimit.h> 32 #include <linux/export.h> 33 34 #include <drm/drmP.h> 35 36 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) 37 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) 38 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) 39 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) 40 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) 41 42 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) 43 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) 44 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) 45 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) 46 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) 47 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) 48 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) 49 50 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) 51 52 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) 53 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) 54 55 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) 56 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) 57 58 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) 59 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) 60 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) 61 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) 62 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) 63 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) 64 65 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) 66 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) 67 68 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) 69 70 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) 71 72 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t) 73 74 typedef struct drm_version_32 { 75 int version_major; /* Major version */ 76 int version_minor; /* Minor version */ 77 int version_patchlevel; /* Patch level */ 78 u32 name_len; /* Length of name buffer */ 79 u32 name; /* Name of driver */ 80 u32 date_len; /* Length of date buffer */ 81 u32 date; /* User-space buffer to hold date */ 82 u32 desc_len; /* Length of desc buffer */ 83 u32 desc; /* User-space buffer to hold desc */ 84 } drm_version32_t; 85 86 static int compat_drm_version(struct file *file, unsigned int cmd, 87 unsigned long arg) 88 { 89 drm_version32_t v32; 90 struct drm_version __user *version; 91 int err; 92 93 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) 94 return -EFAULT; 95 96 version = compat_alloc_user_space(sizeof(*version)); 97 if (!version) 98 return -EFAULT; 99 if (__put_user(v32.name_len, &version->name_len) 100 || __put_user((void __user *)(unsigned long)v32.name, 101 &version->name) 102 || __put_user(v32.date_len, &version->date_len) 103 || __put_user((void __user *)(unsigned long)v32.date, 104 &version->date) 105 || __put_user(v32.desc_len, &version->desc_len) 106 || __put_user((void __user *)(unsigned long)v32.desc, 107 &version->desc)) 108 return -EFAULT; 109 110 err = drm_ioctl(file, 111 DRM_IOCTL_VERSION, (unsigned long)version); 112 if (err) 113 return err; 114 115 if (__get_user(v32.version_major, &version->version_major) 116 || __get_user(v32.version_minor, &version->version_minor) 117 || __get_user(v32.version_patchlevel, &version->version_patchlevel) 118 || __get_user(v32.name_len, &version->name_len) 119 || __get_user(v32.date_len, &version->date_len) 120 || __get_user(v32.desc_len, &version->desc_len)) 121 return -EFAULT; 122 123 if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) 124 return -EFAULT; 125 return 0; 126 } 127 128 typedef struct drm_unique32 { 129 u32 unique_len; /* Length of unique */ 130 u32 unique; /* Unique name for driver instantiation */ 131 } drm_unique32_t; 132 133 static int compat_drm_getunique(struct file *file, unsigned int cmd, 134 unsigned long arg) 135 { 136 drm_unique32_t uq32; 137 struct drm_unique __user *u; 138 int err; 139 140 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 141 return -EFAULT; 142 143 u = compat_alloc_user_space(sizeof(*u)); 144 if (!u) 145 return -EFAULT; 146 if (__put_user(uq32.unique_len, &u->unique_len) 147 || __put_user((void __user *)(unsigned long)uq32.unique, 148 &u->unique)) 149 return -EFAULT; 150 151 err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u); 152 if (err) 153 return err; 154 155 if (__get_user(uq32.unique_len, &u->unique_len)) 156 return -EFAULT; 157 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) 158 return -EFAULT; 159 return 0; 160 } 161 162 static int compat_drm_setunique(struct file *file, unsigned int cmd, 163 unsigned long arg) 164 { 165 drm_unique32_t uq32; 166 struct drm_unique __user *u; 167 168 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 169 return -EFAULT; 170 171 u = compat_alloc_user_space(sizeof(*u)); 172 if (!u) 173 return -EFAULT; 174 if (__put_user(uq32.unique_len, &u->unique_len) 175 || __put_user((void __user *)(unsigned long)uq32.unique, 176 &u->unique)) 177 return -EFAULT; 178 179 return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u); 180 } 181 182 typedef struct drm_map32 { 183 u32 offset; /* Requested physical address (0 for SAREA) */ 184 u32 size; /* Requested physical size (bytes) */ 185 enum drm_map_type type; /* Type of memory to map */ 186 enum drm_map_flags flags; /* Flags */ 187 u32 handle; /* User-space: "Handle" to pass to mmap() */ 188 int mtrr; /* MTRR slot used */ 189 } drm_map32_t; 190 191 static int compat_drm_getmap(struct file *file, unsigned int cmd, 192 unsigned long arg) 193 { 194 drm_map32_t __user *argp = (void __user *)arg; 195 drm_map32_t m32; 196 struct drm_map __user *map; 197 int idx, err; 198 void *handle; 199 200 if (get_user(idx, &argp->offset)) 201 return -EFAULT; 202 203 map = compat_alloc_user_space(sizeof(*map)); 204 if (!map) 205 return -EFAULT; 206 if (__put_user(idx, &map->offset)) 207 return -EFAULT; 208 209 err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map); 210 if (err) 211 return err; 212 213 if (__get_user(m32.offset, &map->offset) 214 || __get_user(m32.size, &map->size) 215 || __get_user(m32.type, &map->type) 216 || __get_user(m32.flags, &map->flags) 217 || __get_user(handle, &map->handle) 218 || __get_user(m32.mtrr, &map->mtrr)) 219 return -EFAULT; 220 221 m32.handle = (unsigned long)handle; 222 if (copy_to_user(argp, &m32, sizeof(m32))) 223 return -EFAULT; 224 return 0; 225 226 } 227 228 static int compat_drm_addmap(struct file *file, unsigned int cmd, 229 unsigned long arg) 230 { 231 drm_map32_t __user *argp = (void __user *)arg; 232 drm_map32_t m32; 233 struct drm_map __user *map; 234 int err; 235 void *handle; 236 237 if (copy_from_user(&m32, argp, sizeof(m32))) 238 return -EFAULT; 239 240 map = compat_alloc_user_space(sizeof(*map)); 241 if (!map) 242 return -EFAULT; 243 if (__put_user(m32.offset, &map->offset) 244 || __put_user(m32.size, &map->size) 245 || __put_user(m32.type, &map->type) 246 || __put_user(m32.flags, &map->flags)) 247 return -EFAULT; 248 249 err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map); 250 if (err) 251 return err; 252 253 if (__get_user(m32.offset, &map->offset) 254 || __get_user(m32.mtrr, &map->mtrr) 255 || __get_user(handle, &map->handle)) 256 return -EFAULT; 257 258 m32.handle = (unsigned long)handle; 259 if (m32.handle != (unsigned long)handle) 260 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n", 261 handle, m32.type, m32.offset); 262 263 if (copy_to_user(argp, &m32, sizeof(m32))) 264 return -EFAULT; 265 266 return 0; 267 } 268 269 static int compat_drm_rmmap(struct file *file, unsigned int cmd, 270 unsigned long arg) 271 { 272 drm_map32_t __user *argp = (void __user *)arg; 273 struct drm_map __user *map; 274 u32 handle; 275 276 if (get_user(handle, &argp->handle)) 277 return -EFAULT; 278 279 map = compat_alloc_user_space(sizeof(*map)); 280 if (!map) 281 return -EFAULT; 282 if (__put_user((void *)(unsigned long)handle, &map->handle)) 283 return -EFAULT; 284 285 return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map); 286 } 287 288 typedef struct drm_client32 { 289 int idx; /* Which client desired? */ 290 int auth; /* Is client authenticated? */ 291 u32 pid; /* Process ID */ 292 u32 uid; /* User ID */ 293 u32 magic; /* Magic */ 294 u32 iocs; /* Ioctl count */ 295 } drm_client32_t; 296 297 static int compat_drm_getclient(struct file *file, unsigned int cmd, 298 unsigned long arg) 299 { 300 drm_client32_t c32; 301 drm_client32_t __user *argp = (void __user *)arg; 302 struct drm_client __user *client; 303 int idx, err; 304 305 if (get_user(idx, &argp->idx)) 306 return -EFAULT; 307 308 client = compat_alloc_user_space(sizeof(*client)); 309 if (!client) 310 return -EFAULT; 311 if (__put_user(idx, &client->idx)) 312 return -EFAULT; 313 314 err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client); 315 if (err) 316 return err; 317 318 if (__get_user(c32.idx, &client->idx) 319 || __get_user(c32.auth, &client->auth) 320 || __get_user(c32.pid, &client->pid) 321 || __get_user(c32.uid, &client->uid) 322 || __get_user(c32.magic, &client->magic) 323 || __get_user(c32.iocs, &client->iocs)) 324 return -EFAULT; 325 326 if (copy_to_user(argp, &c32, sizeof(c32))) 327 return -EFAULT; 328 return 0; 329 } 330 331 typedef struct drm_stats32 { 332 u32 count; 333 struct { 334 u32 value; 335 enum drm_stat_type type; 336 } data[15]; 337 } drm_stats32_t; 338 339 static int compat_drm_getstats(struct file *file, unsigned int cmd, 340 unsigned long arg) 341 { 342 drm_stats32_t s32; 343 drm_stats32_t __user *argp = (void __user *)arg; 344 struct drm_stats __user *stats; 345 int i, err; 346 347 memset(&s32, 0, sizeof(drm_stats32_t)); 348 stats = compat_alloc_user_space(sizeof(*stats)); 349 if (!stats) 350 return -EFAULT; 351 352 err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats); 353 if (err) 354 return err; 355 356 if (__get_user(s32.count, &stats->count)) 357 return -EFAULT; 358 for (i = 0; i < 15; ++i) 359 if (__get_user(s32.data[i].value, &stats->data[i].value) 360 || __get_user(s32.data[i].type, &stats->data[i].type)) 361 return -EFAULT; 362 363 if (copy_to_user(argp, &s32, sizeof(s32))) 364 return -EFAULT; 365 return 0; 366 } 367 368 typedef struct drm_buf_desc32 { 369 int count; /* Number of buffers of this size */ 370 int size; /* Size in bytes */ 371 int low_mark; /* Low water mark */ 372 int high_mark; /* High water mark */ 373 int flags; 374 u32 agp_start; /* Start address in the AGP aperture */ 375 } drm_buf_desc32_t; 376 377 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 378 unsigned long arg) 379 { 380 drm_buf_desc32_t __user *argp = (void __user *)arg; 381 struct drm_buf_desc __user *buf; 382 int err; 383 unsigned long agp_start; 384 385 buf = compat_alloc_user_space(sizeof(*buf)); 386 if (!buf || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))) 387 return -EFAULT; 388 389 if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start)) 390 || __get_user(agp_start, &argp->agp_start) 391 || __put_user(agp_start, &buf->agp_start)) 392 return -EFAULT; 393 394 err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf); 395 if (err) 396 return err; 397 398 if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start)) 399 || __get_user(agp_start, &buf->agp_start) 400 || __put_user(agp_start, &argp->agp_start)) 401 return -EFAULT; 402 403 return 0; 404 } 405 406 static int compat_drm_markbufs(struct file *file, unsigned int cmd, 407 unsigned long arg) 408 { 409 drm_buf_desc32_t b32; 410 drm_buf_desc32_t __user *argp = (void __user *)arg; 411 struct drm_buf_desc __user *buf; 412 413 if (copy_from_user(&b32, argp, sizeof(b32))) 414 return -EFAULT; 415 416 buf = compat_alloc_user_space(sizeof(*buf)); 417 if (!buf) 418 return -EFAULT; 419 420 if (__put_user(b32.size, &buf->size) 421 || __put_user(b32.low_mark, &buf->low_mark) 422 || __put_user(b32.high_mark, &buf->high_mark)) 423 return -EFAULT; 424 425 return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf); 426 } 427 428 typedef struct drm_buf_info32 { 429 int count; /**< Entries in list */ 430 u32 list; 431 } drm_buf_info32_t; 432 433 static int compat_drm_infobufs(struct file *file, unsigned int cmd, 434 unsigned long arg) 435 { 436 drm_buf_info32_t req32; 437 drm_buf_info32_t __user *argp = (void __user *)arg; 438 drm_buf_desc32_t __user *to; 439 struct drm_buf_info __user *request; 440 struct drm_buf_desc __user *list; 441 size_t nbytes; 442 int i, err; 443 int count, actual; 444 445 if (copy_from_user(&req32, argp, sizeof(req32))) 446 return -EFAULT; 447 448 count = req32.count; 449 to = (drm_buf_desc32_t __user *) (unsigned long)req32.list; 450 if (count < 0) 451 count = 0; 452 if (count > 0 453 && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t))) 454 return -EFAULT; 455 456 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc); 457 request = compat_alloc_user_space(nbytes); 458 if (!request) 459 return -EFAULT; 460 list = (struct drm_buf_desc *) (request + 1); 461 462 if (__put_user(count, &request->count) 463 || __put_user(list, &request->list)) 464 return -EFAULT; 465 466 err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request); 467 if (err) 468 return err; 469 470 if (__get_user(actual, &request->count)) 471 return -EFAULT; 472 if (count >= actual) 473 for (i = 0; i < actual; ++i) 474 if (__copy_in_user(&to[i], &list[i], 475 offsetof(struct drm_buf_desc, flags))) 476 return -EFAULT; 477 478 if (__put_user(actual, &argp->count)) 479 return -EFAULT; 480 481 return 0; 482 } 483 484 typedef struct drm_buf_pub32 { 485 int idx; /**< Index into the master buffer list */ 486 int total; /**< Buffer size */ 487 int used; /**< Amount of buffer in use (for DMA) */ 488 u32 address; /**< Address of buffer */ 489 } drm_buf_pub32_t; 490 491 typedef struct drm_buf_map32 { 492 int count; /**< Length of the buffer list */ 493 u32 virtual; /**< Mmap'd area in user-virtual */ 494 u32 list; /**< Buffer information */ 495 } drm_buf_map32_t; 496 497 static int compat_drm_mapbufs(struct file *file, unsigned int cmd, 498 unsigned long arg) 499 { 500 drm_buf_map32_t __user *argp = (void __user *)arg; 501 drm_buf_map32_t req32; 502 drm_buf_pub32_t __user *list32; 503 struct drm_buf_map __user *request; 504 struct drm_buf_pub __user *list; 505 int i, err; 506 int count, actual; 507 size_t nbytes; 508 void __user *addr; 509 510 if (copy_from_user(&req32, argp, sizeof(req32))) 511 return -EFAULT; 512 count = req32.count; 513 list32 = (void __user *)(unsigned long)req32.list; 514 515 if (count < 0) 516 return -EINVAL; 517 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub); 518 request = compat_alloc_user_space(nbytes); 519 if (!request) 520 return -EFAULT; 521 list = (struct drm_buf_pub *) (request + 1); 522 523 if (__put_user(count, &request->count) 524 || __put_user(list, &request->list)) 525 return -EFAULT; 526 527 err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request); 528 if (err) 529 return err; 530 531 if (__get_user(actual, &request->count)) 532 return -EFAULT; 533 if (count >= actual) 534 for (i = 0; i < actual; ++i) 535 if (__copy_in_user(&list32[i], &list[i], 536 offsetof(struct drm_buf_pub, address)) 537 || __get_user(addr, &list[i].address) 538 || __put_user((unsigned long)addr, 539 &list32[i].address)) 540 return -EFAULT; 541 542 if (__put_user(actual, &argp->count) 543 || __get_user(addr, &request->virtual) 544 || __put_user((unsigned long)addr, &argp->virtual)) 545 return -EFAULT; 546 547 return 0; 548 } 549 550 typedef struct drm_buf_free32 { 551 int count; 552 u32 list; 553 } drm_buf_free32_t; 554 555 static int compat_drm_freebufs(struct file *file, unsigned int cmd, 556 unsigned long arg) 557 { 558 drm_buf_free32_t req32; 559 struct drm_buf_free __user *request; 560 drm_buf_free32_t __user *argp = (void __user *)arg; 561 562 if (copy_from_user(&req32, argp, sizeof(req32))) 563 return -EFAULT; 564 565 request = compat_alloc_user_space(sizeof(*request)); 566 if (!request) 567 return -EFAULT; 568 if (__put_user(req32.count, &request->count) 569 || __put_user((int __user *)(unsigned long)req32.list, 570 &request->list)) 571 return -EFAULT; 572 573 return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request); 574 } 575 576 typedef struct drm_ctx_priv_map32 { 577 unsigned int ctx_id; /**< Context requesting private mapping */ 578 u32 handle; /**< Handle of map */ 579 } drm_ctx_priv_map32_t; 580 581 static int compat_drm_setsareactx(struct file *file, unsigned int cmd, 582 unsigned long arg) 583 { 584 drm_ctx_priv_map32_t req32; 585 struct drm_ctx_priv_map __user *request; 586 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 587 588 if (copy_from_user(&req32, argp, sizeof(req32))) 589 return -EFAULT; 590 591 request = compat_alloc_user_space(sizeof(*request)); 592 if (!request) 593 return -EFAULT; 594 if (__put_user(req32.ctx_id, &request->ctx_id) 595 || __put_user((void *)(unsigned long)req32.handle, 596 &request->handle)) 597 return -EFAULT; 598 599 return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request); 600 } 601 602 static int compat_drm_getsareactx(struct file *file, unsigned int cmd, 603 unsigned long arg) 604 { 605 struct drm_ctx_priv_map __user *request; 606 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 607 int err; 608 unsigned int ctx_id; 609 void *handle; 610 611 if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp)) 612 || __get_user(ctx_id, &argp->ctx_id)) 613 return -EFAULT; 614 615 request = compat_alloc_user_space(sizeof(*request)); 616 if (!request) 617 return -EFAULT; 618 if (__put_user(ctx_id, &request->ctx_id)) 619 return -EFAULT; 620 621 err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request); 622 if (err) 623 return err; 624 625 if (__get_user(handle, &request->handle) 626 || __put_user((unsigned long)handle, &argp->handle)) 627 return -EFAULT; 628 629 return 0; 630 } 631 632 typedef struct drm_ctx_res32 { 633 int count; 634 u32 contexts; 635 } drm_ctx_res32_t; 636 637 static int compat_drm_resctx(struct file *file, unsigned int cmd, 638 unsigned long arg) 639 { 640 drm_ctx_res32_t __user *argp = (void __user *)arg; 641 drm_ctx_res32_t res32; 642 struct drm_ctx_res __user *res; 643 int err; 644 645 if (copy_from_user(&res32, argp, sizeof(res32))) 646 return -EFAULT; 647 648 res = compat_alloc_user_space(sizeof(*res)); 649 if (!res) 650 return -EFAULT; 651 if (__put_user(res32.count, &res->count) 652 || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts, 653 &res->contexts)) 654 return -EFAULT; 655 656 err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res); 657 if (err) 658 return err; 659 660 if (__get_user(res32.count, &res->count) 661 || __put_user(res32.count, &argp->count)) 662 return -EFAULT; 663 664 return 0; 665 } 666 667 typedef struct drm_dma32 { 668 int context; /**< Context handle */ 669 int send_count; /**< Number of buffers to send */ 670 u32 send_indices; /**< List of handles to buffers */ 671 u32 send_sizes; /**< Lengths of data to send */ 672 enum drm_dma_flags flags; /**< Flags */ 673 int request_count; /**< Number of buffers requested */ 674 int request_size; /**< Desired size for buffers */ 675 u32 request_indices; /**< Buffer information */ 676 u32 request_sizes; 677 int granted_count; /**< Number of buffers granted */ 678 } drm_dma32_t; 679 680 static int compat_drm_dma(struct file *file, unsigned int cmd, 681 unsigned long arg) 682 { 683 drm_dma32_t d32; 684 drm_dma32_t __user *argp = (void __user *)arg; 685 struct drm_dma __user *d; 686 int err; 687 688 if (copy_from_user(&d32, argp, sizeof(d32))) 689 return -EFAULT; 690 691 d = compat_alloc_user_space(sizeof(*d)); 692 if (!d) 693 return -EFAULT; 694 695 if (__put_user(d32.context, &d->context) 696 || __put_user(d32.send_count, &d->send_count) 697 || __put_user((int __user *)(unsigned long)d32.send_indices, 698 &d->send_indices) 699 || __put_user((int __user *)(unsigned long)d32.send_sizes, 700 &d->send_sizes) 701 || __put_user(d32.flags, &d->flags) 702 || __put_user(d32.request_count, &d->request_count) 703 || __put_user((int __user *)(unsigned long)d32.request_indices, 704 &d->request_indices) 705 || __put_user((int __user *)(unsigned long)d32.request_sizes, 706 &d->request_sizes)) 707 return -EFAULT; 708 709 err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d); 710 if (err) 711 return err; 712 713 if (__get_user(d32.request_size, &d->request_size) 714 || __get_user(d32.granted_count, &d->granted_count) 715 || __put_user(d32.request_size, &argp->request_size) 716 || __put_user(d32.granted_count, &argp->granted_count)) 717 return -EFAULT; 718 719 return 0; 720 } 721 722 #if IS_ENABLED(CONFIG_AGP) 723 typedef struct drm_agp_mode32 { 724 u32 mode; /**< AGP mode */ 725 } drm_agp_mode32_t; 726 727 static int compat_drm_agp_enable(struct file *file, unsigned int cmd, 728 unsigned long arg) 729 { 730 drm_agp_mode32_t __user *argp = (void __user *)arg; 731 drm_agp_mode32_t m32; 732 struct drm_agp_mode __user *mode; 733 734 if (get_user(m32.mode, &argp->mode)) 735 return -EFAULT; 736 737 mode = compat_alloc_user_space(sizeof(*mode)); 738 if (put_user(m32.mode, &mode->mode)) 739 return -EFAULT; 740 741 return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode); 742 } 743 744 typedef struct drm_agp_info32 { 745 int agp_version_major; 746 int agp_version_minor; 747 u32 mode; 748 u32 aperture_base; /* physical address */ 749 u32 aperture_size; /* bytes */ 750 u32 memory_allowed; /* bytes */ 751 u32 memory_used; 752 753 /* PCI information */ 754 unsigned short id_vendor; 755 unsigned short id_device; 756 } drm_agp_info32_t; 757 758 static int compat_drm_agp_info(struct file *file, unsigned int cmd, 759 unsigned long arg) 760 { 761 drm_agp_info32_t __user *argp = (void __user *)arg; 762 drm_agp_info32_t i32; 763 struct drm_agp_info __user *info; 764 int err; 765 766 info = compat_alloc_user_space(sizeof(*info)); 767 if (!info) 768 return -EFAULT; 769 770 err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info); 771 if (err) 772 return err; 773 774 if (__get_user(i32.agp_version_major, &info->agp_version_major) 775 || __get_user(i32.agp_version_minor, &info->agp_version_minor) 776 || __get_user(i32.mode, &info->mode) 777 || __get_user(i32.aperture_base, &info->aperture_base) 778 || __get_user(i32.aperture_size, &info->aperture_size) 779 || __get_user(i32.memory_allowed, &info->memory_allowed) 780 || __get_user(i32.memory_used, &info->memory_used) 781 || __get_user(i32.id_vendor, &info->id_vendor) 782 || __get_user(i32.id_device, &info->id_device)) 783 return -EFAULT; 784 785 if (copy_to_user(argp, &i32, sizeof(i32))) 786 return -EFAULT; 787 788 return 0; 789 } 790 791 typedef struct drm_agp_buffer32 { 792 u32 size; /**< In bytes -- will round to page boundary */ 793 u32 handle; /**< Used for binding / unbinding */ 794 u32 type; /**< Type of memory to allocate */ 795 u32 physical; /**< Physical used by i810 */ 796 } drm_agp_buffer32_t; 797 798 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd, 799 unsigned long arg) 800 { 801 drm_agp_buffer32_t __user *argp = (void __user *)arg; 802 drm_agp_buffer32_t req32; 803 struct drm_agp_buffer __user *request; 804 int err; 805 806 if (copy_from_user(&req32, argp, sizeof(req32))) 807 return -EFAULT; 808 809 request = compat_alloc_user_space(sizeof(*request)); 810 if (!request 811 || __put_user(req32.size, &request->size) 812 || __put_user(req32.type, &request->type)) 813 return -EFAULT; 814 815 err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request); 816 if (err) 817 return err; 818 819 if (__get_user(req32.handle, &request->handle) 820 || __get_user(req32.physical, &request->physical) 821 || copy_to_user(argp, &req32, sizeof(req32))) { 822 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request); 823 return -EFAULT; 824 } 825 826 return 0; 827 } 828 829 static int compat_drm_agp_free(struct file *file, unsigned int cmd, 830 unsigned long arg) 831 { 832 drm_agp_buffer32_t __user *argp = (void __user *)arg; 833 struct drm_agp_buffer __user *request; 834 u32 handle; 835 836 request = compat_alloc_user_space(sizeof(*request)); 837 if (!request 838 || get_user(handle, &argp->handle) 839 || __put_user(handle, &request->handle)) 840 return -EFAULT; 841 842 return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request); 843 } 844 845 typedef struct drm_agp_binding32 { 846 u32 handle; /**< From drm_agp_buffer */ 847 u32 offset; /**< In bytes -- will round to page boundary */ 848 } drm_agp_binding32_t; 849 850 static int compat_drm_agp_bind(struct file *file, unsigned int cmd, 851 unsigned long arg) 852 { 853 drm_agp_binding32_t __user *argp = (void __user *)arg; 854 drm_agp_binding32_t req32; 855 struct drm_agp_binding __user *request; 856 857 if (copy_from_user(&req32, argp, sizeof(req32))) 858 return -EFAULT; 859 860 request = compat_alloc_user_space(sizeof(*request)); 861 if (!request 862 || __put_user(req32.handle, &request->handle) 863 || __put_user(req32.offset, &request->offset)) 864 return -EFAULT; 865 866 return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request); 867 } 868 869 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd, 870 unsigned long arg) 871 { 872 drm_agp_binding32_t __user *argp = (void __user *)arg; 873 struct drm_agp_binding __user *request; 874 u32 handle; 875 876 request = compat_alloc_user_space(sizeof(*request)); 877 if (!request 878 || get_user(handle, &argp->handle) 879 || __put_user(handle, &request->handle)) 880 return -EFAULT; 881 882 return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request); 883 } 884 #endif /* CONFIG_AGP */ 885 886 typedef struct drm_scatter_gather32 { 887 u32 size; /**< In bytes -- will round to page boundary */ 888 u32 handle; /**< Used for mapping / unmapping */ 889 } drm_scatter_gather32_t; 890 891 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd, 892 unsigned long arg) 893 { 894 drm_scatter_gather32_t __user *argp = (void __user *)arg; 895 struct drm_scatter_gather __user *request; 896 int err; 897 unsigned long x; 898 899 request = compat_alloc_user_space(sizeof(*request)); 900 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)) 901 || __get_user(x, &argp->size) 902 || __put_user(x, &request->size)) 903 return -EFAULT; 904 905 err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request); 906 if (err) 907 return err; 908 909 /* XXX not sure about the handle conversion here... */ 910 if (__get_user(x, &request->handle) 911 || __put_user(x >> PAGE_SHIFT, &argp->handle)) 912 return -EFAULT; 913 914 return 0; 915 } 916 917 static int compat_drm_sg_free(struct file *file, unsigned int cmd, 918 unsigned long arg) 919 { 920 drm_scatter_gather32_t __user *argp = (void __user *)arg; 921 struct drm_scatter_gather __user *request; 922 unsigned long x; 923 924 request = compat_alloc_user_space(sizeof(*request)); 925 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)) 926 || __get_user(x, &argp->handle) 927 || __put_user(x << PAGE_SHIFT, &request->handle)) 928 return -EFAULT; 929 930 return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request); 931 } 932 933 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 934 typedef struct drm_update_draw32 { 935 drm_drawable_t handle; 936 unsigned int type; 937 unsigned int num; 938 /* 64-bit version has a 32-bit pad here */ 939 u64 data; /**< Pointer */ 940 } __attribute__((packed)) drm_update_draw32_t; 941 942 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 943 unsigned long arg) 944 { 945 drm_update_draw32_t update32; 946 struct drm_update_draw __user *request; 947 int err; 948 949 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32))) 950 return -EFAULT; 951 952 request = compat_alloc_user_space(sizeof(*request)); 953 if (!request || 954 __put_user(update32.handle, &request->handle) || 955 __put_user(update32.type, &request->type) || 956 __put_user(update32.num, &request->num) || 957 __put_user(update32.data, &request->data)) 958 return -EFAULT; 959 960 err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request); 961 return err; 962 } 963 #endif 964 965 struct drm_wait_vblank_request32 { 966 enum drm_vblank_seq_type type; 967 unsigned int sequence; 968 u32 signal; 969 }; 970 971 struct drm_wait_vblank_reply32 { 972 enum drm_vblank_seq_type type; 973 unsigned int sequence; 974 s32 tval_sec; 975 s32 tval_usec; 976 }; 977 978 typedef union drm_wait_vblank32 { 979 struct drm_wait_vblank_request32 request; 980 struct drm_wait_vblank_reply32 reply; 981 } drm_wait_vblank32_t; 982 983 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, 984 unsigned long arg) 985 { 986 drm_wait_vblank32_t __user *argp = (void __user *)arg; 987 drm_wait_vblank32_t req32; 988 union drm_wait_vblank __user *request; 989 int err; 990 991 if (copy_from_user(&req32, argp, sizeof(req32))) 992 return -EFAULT; 993 994 request = compat_alloc_user_space(sizeof(*request)); 995 if (!request 996 || __put_user(req32.request.type, &request->request.type) 997 || __put_user(req32.request.sequence, &request->request.sequence) 998 || __put_user(req32.request.signal, &request->request.signal)) 999 return -EFAULT; 1000 1001 err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request); 1002 if (err) 1003 return err; 1004 1005 if (__get_user(req32.reply.type, &request->reply.type) 1006 || __get_user(req32.reply.sequence, &request->reply.sequence) 1007 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec) 1008 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec)) 1009 return -EFAULT; 1010 1011 if (copy_to_user(argp, &req32, sizeof(req32))) 1012 return -EFAULT; 1013 1014 return 0; 1015 } 1016 1017 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 1018 typedef struct drm_mode_fb_cmd232 { 1019 u32 fb_id; 1020 u32 width; 1021 u32 height; 1022 u32 pixel_format; 1023 u32 flags; 1024 u32 handles[4]; 1025 u32 pitches[4]; 1026 u32 offsets[4]; 1027 u64 modifier[4]; 1028 } __attribute__((packed)) drm_mode_fb_cmd232_t; 1029 1030 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, 1031 unsigned long arg) 1032 { 1033 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; 1034 struct drm_mode_fb_cmd232 req32; 1035 struct drm_mode_fb_cmd2 __user *req64; 1036 int i; 1037 int err; 1038 1039 if (copy_from_user(&req32, argp, sizeof(req32))) 1040 return -EFAULT; 1041 1042 req64 = compat_alloc_user_space(sizeof(*req64)); 1043 1044 if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64)) 1045 || __put_user(req32.width, &req64->width) 1046 || __put_user(req32.height, &req64->height) 1047 || __put_user(req32.pixel_format, &req64->pixel_format) 1048 || __put_user(req32.flags, &req64->flags)) 1049 return -EFAULT; 1050 1051 for (i = 0; i < 4; i++) { 1052 if (__put_user(req32.handles[i], &req64->handles[i])) 1053 return -EFAULT; 1054 if (__put_user(req32.pitches[i], &req64->pitches[i])) 1055 return -EFAULT; 1056 if (__put_user(req32.offsets[i], &req64->offsets[i])) 1057 return -EFAULT; 1058 if (__put_user(req32.modifier[i], &req64->modifier[i])) 1059 return -EFAULT; 1060 } 1061 1062 err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64); 1063 if (err) 1064 return err; 1065 1066 if (__get_user(req32.fb_id, &req64->fb_id)) 1067 return -EFAULT; 1068 1069 if (copy_to_user(argp, &req32, sizeof(req32))) 1070 return -EFAULT; 1071 1072 return 0; 1073 } 1074 #endif 1075 1076 static drm_ioctl_compat_t *drm_compat_ioctls[] = { 1077 [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version, 1078 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique, 1079 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap, 1080 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient, 1081 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats, 1082 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique, 1083 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap, 1084 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs, 1085 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs, 1086 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs, 1087 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs, 1088 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs, 1089 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap, 1090 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx, 1091 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx, 1092 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx, 1093 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma, 1094 #if IS_ENABLED(CONFIG_AGP) 1095 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable, 1096 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info, 1097 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc, 1098 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free, 1099 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind, 1100 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind, 1101 #endif 1102 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc, 1103 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free, 1104 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 1105 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw, 1106 #endif 1107 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank, 1108 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 1109 [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2, 1110 #endif 1111 }; 1112 1113 /** 1114 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers 1115 * @filp: file this ioctl is called on 1116 * @cmd: ioctl cmd number 1117 * @arg: user argument 1118 * 1119 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual 1120 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as 1121 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has 1122 * botched IOCTL itself, it must handle those by wrapping this function. 1123 * 1124 * Returns: 1125 * Zero on success, negative error code on failure. 1126 */ 1127 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1128 { 1129 unsigned int nr = DRM_IOCTL_NR(cmd); 1130 drm_ioctl_compat_t *fn; 1131 int ret; 1132 1133 /* Assume that ioctls without an explicit compat routine will just 1134 * work. This may not always be a good assumption, but it's better 1135 * than always failing. 1136 */ 1137 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 1138 return drm_ioctl(filp, cmd, arg); 1139 1140 fn = drm_compat_ioctls[nr]; 1141 1142 if (fn != NULL) 1143 ret = (*fn) (filp, cmd, arg); 1144 else 1145 ret = drm_ioctl(filp, cmd, arg); 1146 1147 return ret; 1148 } 1149 EXPORT_SYMBOL(drm_compat_ioctl); 1150