1 /* 2 * \file drm_ioc32.c 3 * 4 * 32-bit ioctl compatibility routines for the DRM. 5 * 6 * \author Paul Mackerras <paulus@samba.org> 7 * 8 * Copyright (C) Paul Mackerras 2005. 9 * All Rights Reserved. 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a 12 * copy of this software and associated documentation files (the "Software"), 13 * to deal in the Software without restriction, including without limitation 14 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 15 * and/or sell copies of the Software, and to permit persons to whom the 16 * Software is furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice (including the next 19 * paragraph) shall be included in all copies or substantial portions of the 20 * Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 28 * IN THE SOFTWARE. 29 */ 30 #include <linux/compat.h> 31 #include <linux/ratelimit.h> 32 #include <linux/export.h> 33 34 #include <drm/drm_agpsupport.h> 35 #include <drm/drm_file.h> 36 #include <drm/drm_print.h> 37 38 #include "drm_crtc_internal.h" 39 #include "drm_internal.h" 40 #include "drm_legacy.h" 41 42 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) 43 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) 44 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) 45 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) 46 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) 47 48 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) 49 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) 50 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) 51 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) 52 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) 53 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) 54 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) 55 56 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) 57 58 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) 59 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) 60 61 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) 62 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) 63 64 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) 65 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) 66 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) 67 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) 68 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) 69 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) 70 71 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) 72 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) 73 74 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) 75 76 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) 77 78 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t) 79 80 typedef struct drm_version_32 { 81 int version_major; /* Major version */ 82 int version_minor; /* Minor version */ 83 int version_patchlevel; /* Patch level */ 84 u32 name_len; /* Length of name buffer */ 85 u32 name; /* Name of driver */ 86 u32 date_len; /* Length of date buffer */ 87 u32 date; /* User-space buffer to hold date */ 88 u32 desc_len; /* Length of desc buffer */ 89 u32 desc; /* User-space buffer to hold desc */ 90 } drm_version32_t; 91 92 static int compat_drm_version(struct file *file, unsigned int cmd, 93 unsigned long arg) 94 { 95 drm_version32_t v32; 96 struct drm_version v; 97 int err; 98 99 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) 100 return -EFAULT; 101 102 v = (struct drm_version) { 103 .name_len = v32.name_len, 104 .name = compat_ptr(v32.name), 105 .date_len = v32.date_len, 106 .date = compat_ptr(v32.date), 107 .desc_len = v32.desc_len, 108 .desc = compat_ptr(v32.desc), 109 }; 110 err = drm_ioctl_kernel(file, drm_version, &v, 111 DRM_UNLOCKED|DRM_RENDER_ALLOW); 112 if (err) 113 return err; 114 115 v32.version_major = v.version_major; 116 v32.version_minor = v.version_minor; 117 v32.version_patchlevel = v.version_patchlevel; 118 v32.name_len = v.name_len; 119 v32.date_len = v.date_len; 120 v32.desc_len = v.desc_len; 121 if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) 122 return -EFAULT; 123 return 0; 124 } 125 126 typedef struct drm_unique32 { 127 u32 unique_len; /* Length of unique */ 128 u32 unique; /* Unique name for driver instantiation */ 129 } drm_unique32_t; 130 131 static int compat_drm_getunique(struct file *file, unsigned int cmd, 132 unsigned long arg) 133 { 134 drm_unique32_t uq32; 135 struct drm_unique uq; 136 int err; 137 138 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 139 return -EFAULT; 140 uq = (struct drm_unique){ 141 .unique_len = uq32.unique_len, 142 .unique = compat_ptr(uq32.unique), 143 }; 144 145 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED); 146 if (err) 147 return err; 148 149 uq32.unique_len = uq.unique_len; 150 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) 151 return -EFAULT; 152 return 0; 153 } 154 155 static int compat_drm_setunique(struct file *file, unsigned int cmd, 156 unsigned long arg) 157 { 158 /* it's dead */ 159 return -EINVAL; 160 } 161 162 #if IS_ENABLED(CONFIG_DRM_LEGACY) 163 typedef struct drm_map32 { 164 u32 offset; /* Requested physical address (0 for SAREA) */ 165 u32 size; /* Requested physical size (bytes) */ 166 enum drm_map_type type; /* Type of memory to map */ 167 enum drm_map_flags flags; /* Flags */ 168 u32 handle; /* User-space: "Handle" to pass to mmap() */ 169 int mtrr; /* MTRR slot used */ 170 } drm_map32_t; 171 172 static int compat_drm_getmap(struct file *file, unsigned int cmd, 173 unsigned long arg) 174 { 175 drm_map32_t __user *argp = (void __user *)arg; 176 drm_map32_t m32; 177 struct drm_map map; 178 int err; 179 180 if (copy_from_user(&m32, argp, sizeof(m32))) 181 return -EFAULT; 182 183 map.offset = m32.offset; 184 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED); 185 if (err) 186 return err; 187 188 m32.offset = map.offset; 189 m32.size = map.size; 190 m32.type = map.type; 191 m32.flags = map.flags; 192 m32.handle = ptr_to_compat((void __user *)map.handle); 193 m32.mtrr = map.mtrr; 194 if (copy_to_user(argp, &m32, sizeof(m32))) 195 return -EFAULT; 196 return 0; 197 198 } 199 200 static int compat_drm_addmap(struct file *file, unsigned int cmd, 201 unsigned long arg) 202 { 203 drm_map32_t __user *argp = (void __user *)arg; 204 drm_map32_t m32; 205 struct drm_map map; 206 int err; 207 208 if (copy_from_user(&m32, argp, sizeof(m32))) 209 return -EFAULT; 210 211 map.offset = m32.offset; 212 map.size = m32.size; 213 map.type = m32.type; 214 map.flags = m32.flags; 215 216 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map, 217 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 218 if (err) 219 return err; 220 221 m32.offset = map.offset; 222 m32.mtrr = map.mtrr; 223 m32.handle = ptr_to_compat((void __user *)map.handle); 224 if (map.handle != compat_ptr(m32.handle)) 225 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n", 226 map.handle, m32.type, m32.offset); 227 228 if (copy_to_user(argp, &m32, sizeof(m32))) 229 return -EFAULT; 230 231 return 0; 232 } 233 234 static int compat_drm_rmmap(struct file *file, unsigned int cmd, 235 unsigned long arg) 236 { 237 drm_map32_t __user *argp = (void __user *)arg; 238 struct drm_map map; 239 u32 handle; 240 241 if (get_user(handle, &argp->handle)) 242 return -EFAULT; 243 map.handle = compat_ptr(handle); 244 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH); 245 } 246 #endif 247 248 typedef struct drm_client32 { 249 int idx; /* Which client desired? */ 250 int auth; /* Is client authenticated? */ 251 u32 pid; /* Process ID */ 252 u32 uid; /* User ID */ 253 u32 magic; /* Magic */ 254 u32 iocs; /* Ioctl count */ 255 } drm_client32_t; 256 257 static int compat_drm_getclient(struct file *file, unsigned int cmd, 258 unsigned long arg) 259 { 260 drm_client32_t c32; 261 drm_client32_t __user *argp = (void __user *)arg; 262 struct drm_client client; 263 int err; 264 265 if (copy_from_user(&c32, argp, sizeof(c32))) 266 return -EFAULT; 267 268 client.idx = c32.idx; 269 270 err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED); 271 if (err) 272 return err; 273 274 c32.idx = client.idx; 275 c32.auth = client.auth; 276 c32.pid = client.pid; 277 c32.uid = client.uid; 278 c32.magic = client.magic; 279 c32.iocs = client.iocs; 280 281 if (copy_to_user(argp, &c32, sizeof(c32))) 282 return -EFAULT; 283 return 0; 284 } 285 286 typedef struct drm_stats32 { 287 u32 count; 288 struct { 289 u32 value; 290 enum drm_stat_type type; 291 } data[15]; 292 } drm_stats32_t; 293 294 static int compat_drm_getstats(struct file *file, unsigned int cmd, 295 unsigned long arg) 296 { 297 drm_stats32_t __user *argp = (void __user *)arg; 298 int err; 299 300 err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED); 301 if (err) 302 return err; 303 304 if (clear_user(argp, sizeof(drm_stats32_t))) 305 return -EFAULT; 306 return 0; 307 } 308 309 #if IS_ENABLED(CONFIG_DRM_LEGACY) 310 typedef struct drm_buf_desc32 { 311 int count; /* Number of buffers of this size */ 312 int size; /* Size in bytes */ 313 int low_mark; /* Low water mark */ 314 int high_mark; /* High water mark */ 315 int flags; 316 u32 agp_start; /* Start address in the AGP aperture */ 317 } drm_buf_desc32_t; 318 319 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 320 unsigned long arg) 321 { 322 drm_buf_desc32_t __user *argp = (void __user *)arg; 323 drm_buf_desc32_t desc32; 324 struct drm_buf_desc desc; 325 int err; 326 327 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t))) 328 return -EFAULT; 329 330 desc = (struct drm_buf_desc){ 331 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark, 332 desc32.flags, desc32.agp_start 333 }; 334 335 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc, 336 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 337 if (err) 338 return err; 339 340 desc32 = (drm_buf_desc32_t){ 341 desc.count, desc.size, desc.low_mark, desc.high_mark, 342 desc.flags, desc.agp_start 343 }; 344 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t))) 345 return -EFAULT; 346 347 return 0; 348 } 349 350 static int compat_drm_markbufs(struct file *file, unsigned int cmd, 351 unsigned long arg) 352 { 353 drm_buf_desc32_t b32; 354 drm_buf_desc32_t __user *argp = (void __user *)arg; 355 struct drm_buf_desc buf; 356 357 if (copy_from_user(&b32, argp, sizeof(b32))) 358 return -EFAULT; 359 360 buf.size = b32.size; 361 buf.low_mark = b32.low_mark; 362 buf.high_mark = b32.high_mark; 363 364 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf, 365 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 366 } 367 368 typedef struct drm_buf_info32 { 369 int count; /**< Entries in list */ 370 u32 list; 371 } drm_buf_info32_t; 372 373 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from) 374 { 375 drm_buf_info32_t *request = data; 376 drm_buf_desc32_t __user *to = compat_ptr(request->list); 377 drm_buf_desc32_t v = {.count = from->buf_count, 378 .size = from->buf_size, 379 .low_mark = from->low_mark, 380 .high_mark = from->high_mark}; 381 382 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags))) 383 return -EFAULT; 384 return 0; 385 } 386 387 static int drm_legacy_infobufs32(struct drm_device *dev, void *data, 388 struct drm_file *file_priv) 389 { 390 drm_buf_info32_t *request = data; 391 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32); 392 } 393 394 static int compat_drm_infobufs(struct file *file, unsigned int cmd, 395 unsigned long arg) 396 { 397 drm_buf_info32_t req32; 398 drm_buf_info32_t __user *argp = (void __user *)arg; 399 int err; 400 401 if (copy_from_user(&req32, argp, sizeof(req32))) 402 return -EFAULT; 403 404 if (req32.count < 0) 405 req32.count = 0; 406 407 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH); 408 if (err) 409 return err; 410 411 if (put_user(req32.count, &argp->count)) 412 return -EFAULT; 413 414 return 0; 415 } 416 417 typedef struct drm_buf_pub32 { 418 int idx; /**< Index into the master buffer list */ 419 int total; /**< Buffer size */ 420 int used; /**< Amount of buffer in use (for DMA) */ 421 u32 address; /**< Address of buffer */ 422 } drm_buf_pub32_t; 423 424 typedef struct drm_buf_map32 { 425 int count; /**< Length of the buffer list */ 426 u32 virtual; /**< Mmap'd area in user-virtual */ 427 u32 list; /**< Buffer information */ 428 } drm_buf_map32_t; 429 430 static int map_one_buf32(void *data, int idx, unsigned long virtual, 431 struct drm_buf *buf) 432 { 433 drm_buf_map32_t *request = data; 434 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx; 435 drm_buf_pub32_t v; 436 437 v.idx = buf->idx; 438 v.total = buf->total; 439 v.used = 0; 440 v.address = virtual + buf->offset; 441 if (copy_to_user(to, &v, sizeof(v))) 442 return -EFAULT; 443 return 0; 444 } 445 446 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data, 447 struct drm_file *file_priv) 448 { 449 drm_buf_map32_t *request = data; 450 void __user *v; 451 int err = __drm_legacy_mapbufs(dev, data, &request->count, 452 &v, map_one_buf32, 453 file_priv); 454 request->virtual = ptr_to_compat(v); 455 return err; 456 } 457 458 static int compat_drm_mapbufs(struct file *file, unsigned int cmd, 459 unsigned long arg) 460 { 461 drm_buf_map32_t __user *argp = (void __user *)arg; 462 drm_buf_map32_t req32; 463 int err; 464 465 if (copy_from_user(&req32, argp, sizeof(req32))) 466 return -EFAULT; 467 if (req32.count < 0) 468 return -EINVAL; 469 470 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH); 471 if (err) 472 return err; 473 474 if (put_user(req32.count, &argp->count) 475 || put_user(req32.virtual, &argp->virtual)) 476 return -EFAULT; 477 478 return 0; 479 } 480 481 typedef struct drm_buf_free32 { 482 int count; 483 u32 list; 484 } drm_buf_free32_t; 485 486 static int compat_drm_freebufs(struct file *file, unsigned int cmd, 487 unsigned long arg) 488 { 489 drm_buf_free32_t req32; 490 struct drm_buf_free request; 491 drm_buf_free32_t __user *argp = (void __user *)arg; 492 493 if (copy_from_user(&req32, argp, sizeof(req32))) 494 return -EFAULT; 495 496 request.count = req32.count; 497 request.list = compat_ptr(req32.list); 498 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH); 499 } 500 501 typedef struct drm_ctx_priv_map32 { 502 unsigned int ctx_id; /**< Context requesting private mapping */ 503 u32 handle; /**< Handle of map */ 504 } drm_ctx_priv_map32_t; 505 506 static int compat_drm_setsareactx(struct file *file, unsigned int cmd, 507 unsigned long arg) 508 { 509 drm_ctx_priv_map32_t req32; 510 struct drm_ctx_priv_map request; 511 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 512 513 if (copy_from_user(&req32, argp, sizeof(req32))) 514 return -EFAULT; 515 516 request.ctx_id = req32.ctx_id; 517 request.handle = compat_ptr(req32.handle); 518 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request, 519 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 520 } 521 522 static int compat_drm_getsareactx(struct file *file, unsigned int cmd, 523 unsigned long arg) 524 { 525 struct drm_ctx_priv_map req; 526 drm_ctx_priv_map32_t req32; 527 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 528 int err; 529 530 if (copy_from_user(&req32, argp, sizeof(req32))) 531 return -EFAULT; 532 533 req.ctx_id = req32.ctx_id; 534 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH); 535 if (err) 536 return err; 537 538 req32.handle = ptr_to_compat((void __user *)req.handle); 539 if (copy_to_user(argp, &req32, sizeof(req32))) 540 return -EFAULT; 541 542 return 0; 543 } 544 545 typedef struct drm_ctx_res32 { 546 int count; 547 u32 contexts; 548 } drm_ctx_res32_t; 549 550 static int compat_drm_resctx(struct file *file, unsigned int cmd, 551 unsigned long arg) 552 { 553 drm_ctx_res32_t __user *argp = (void __user *)arg; 554 drm_ctx_res32_t res32; 555 struct drm_ctx_res res; 556 int err; 557 558 if (copy_from_user(&res32, argp, sizeof(res32))) 559 return -EFAULT; 560 561 res.count = res32.count; 562 res.contexts = compat_ptr(res32.contexts); 563 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH); 564 if (err) 565 return err; 566 567 res32.count = res.count; 568 if (copy_to_user(argp, &res32, sizeof(res32))) 569 return -EFAULT; 570 571 return 0; 572 } 573 574 typedef struct drm_dma32 { 575 int context; /**< Context handle */ 576 int send_count; /**< Number of buffers to send */ 577 u32 send_indices; /**< List of handles to buffers */ 578 u32 send_sizes; /**< Lengths of data to send */ 579 enum drm_dma_flags flags; /**< Flags */ 580 int request_count; /**< Number of buffers requested */ 581 int request_size; /**< Desired size for buffers */ 582 u32 request_indices; /**< Buffer information */ 583 u32 request_sizes; 584 int granted_count; /**< Number of buffers granted */ 585 } drm_dma32_t; 586 587 static int compat_drm_dma(struct file *file, unsigned int cmd, 588 unsigned long arg) 589 { 590 drm_dma32_t d32; 591 drm_dma32_t __user *argp = (void __user *)arg; 592 struct drm_dma d; 593 int err; 594 595 if (copy_from_user(&d32, argp, sizeof(d32))) 596 return -EFAULT; 597 598 d.context = d32.context; 599 d.send_count = d32.send_count; 600 d.send_indices = compat_ptr(d32.send_indices); 601 d.send_sizes = compat_ptr(d32.send_sizes); 602 d.flags = d32.flags; 603 d.request_count = d32.request_count; 604 d.request_indices = compat_ptr(d32.request_indices); 605 d.request_sizes = compat_ptr(d32.request_sizes); 606 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH); 607 if (err) 608 return err; 609 610 if (put_user(d.request_size, &argp->request_size) 611 || put_user(d.granted_count, &argp->granted_count)) 612 return -EFAULT; 613 614 return 0; 615 } 616 #endif 617 618 #if IS_ENABLED(CONFIG_AGP) 619 typedef struct drm_agp_mode32 { 620 u32 mode; /**< AGP mode */ 621 } drm_agp_mode32_t; 622 623 static int compat_drm_agp_enable(struct file *file, unsigned int cmd, 624 unsigned long arg) 625 { 626 drm_agp_mode32_t __user *argp = (void __user *)arg; 627 struct drm_agp_mode mode; 628 629 if (get_user(mode.mode, &argp->mode)) 630 return -EFAULT; 631 632 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode, 633 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 634 } 635 636 typedef struct drm_agp_info32 { 637 int agp_version_major; 638 int agp_version_minor; 639 u32 mode; 640 u32 aperture_base; /* physical address */ 641 u32 aperture_size; /* bytes */ 642 u32 memory_allowed; /* bytes */ 643 u32 memory_used; 644 645 /* PCI information */ 646 unsigned short id_vendor; 647 unsigned short id_device; 648 } drm_agp_info32_t; 649 650 static int compat_drm_agp_info(struct file *file, unsigned int cmd, 651 unsigned long arg) 652 { 653 drm_agp_info32_t __user *argp = (void __user *)arg; 654 drm_agp_info32_t i32; 655 struct drm_agp_info info; 656 int err; 657 658 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH); 659 if (err) 660 return err; 661 662 i32.agp_version_major = info.agp_version_major; 663 i32.agp_version_minor = info.agp_version_minor; 664 i32.mode = info.mode; 665 i32.aperture_base = info.aperture_base; 666 i32.aperture_size = info.aperture_size; 667 i32.memory_allowed = info.memory_allowed; 668 i32.memory_used = info.memory_used; 669 i32.id_vendor = info.id_vendor; 670 i32.id_device = info.id_device; 671 if (copy_to_user(argp, &i32, sizeof(i32))) 672 return -EFAULT; 673 674 return 0; 675 } 676 677 typedef struct drm_agp_buffer32 { 678 u32 size; /**< In bytes -- will round to page boundary */ 679 u32 handle; /**< Used for binding / unbinding */ 680 u32 type; /**< Type of memory to allocate */ 681 u32 physical; /**< Physical used by i810 */ 682 } drm_agp_buffer32_t; 683 684 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd, 685 unsigned long arg) 686 { 687 drm_agp_buffer32_t __user *argp = (void __user *)arg; 688 drm_agp_buffer32_t req32; 689 struct drm_agp_buffer request; 690 int err; 691 692 if (copy_from_user(&req32, argp, sizeof(req32))) 693 return -EFAULT; 694 695 request.size = req32.size; 696 request.type = req32.type; 697 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request, 698 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 699 if (err) 700 return err; 701 702 req32.handle = request.handle; 703 req32.physical = request.physical; 704 if (copy_to_user(argp, &req32, sizeof(req32))) { 705 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request, 706 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 707 return -EFAULT; 708 } 709 710 return 0; 711 } 712 713 static int compat_drm_agp_free(struct file *file, unsigned int cmd, 714 unsigned long arg) 715 { 716 drm_agp_buffer32_t __user *argp = (void __user *)arg; 717 struct drm_agp_buffer request; 718 719 if (get_user(request.handle, &argp->handle)) 720 return -EFAULT; 721 722 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request, 723 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 724 } 725 726 typedef struct drm_agp_binding32 { 727 u32 handle; /**< From drm_agp_buffer */ 728 u32 offset; /**< In bytes -- will round to page boundary */ 729 } drm_agp_binding32_t; 730 731 static int compat_drm_agp_bind(struct file *file, unsigned int cmd, 732 unsigned long arg) 733 { 734 drm_agp_binding32_t __user *argp = (void __user *)arg; 735 drm_agp_binding32_t req32; 736 struct drm_agp_binding request; 737 738 if (copy_from_user(&req32, argp, sizeof(req32))) 739 return -EFAULT; 740 741 request.handle = req32.handle; 742 request.offset = req32.offset; 743 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request, 744 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 745 } 746 747 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd, 748 unsigned long arg) 749 { 750 drm_agp_binding32_t __user *argp = (void __user *)arg; 751 struct drm_agp_binding request; 752 753 if (get_user(request.handle, &argp->handle)) 754 return -EFAULT; 755 756 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request, 757 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 758 } 759 #endif /* CONFIG_AGP */ 760 761 #if IS_ENABLED(CONFIG_DRM_LEGACY) 762 typedef struct drm_scatter_gather32 { 763 u32 size; /**< In bytes -- will round to page boundary */ 764 u32 handle; /**< Used for mapping / unmapping */ 765 } drm_scatter_gather32_t; 766 767 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd, 768 unsigned long arg) 769 { 770 drm_scatter_gather32_t __user *argp = (void __user *)arg; 771 struct drm_scatter_gather request; 772 int err; 773 774 if (get_user(request.size, &argp->size)) 775 return -EFAULT; 776 777 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request, 778 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 779 if (err) 780 return err; 781 782 /* XXX not sure about the handle conversion here... */ 783 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle)) 784 return -EFAULT; 785 786 return 0; 787 } 788 789 static int compat_drm_sg_free(struct file *file, unsigned int cmd, 790 unsigned long arg) 791 { 792 drm_scatter_gather32_t __user *argp = (void __user *)arg; 793 struct drm_scatter_gather request; 794 unsigned long x; 795 796 if (get_user(x, &argp->handle)) 797 return -EFAULT; 798 request.handle = x << PAGE_SHIFT; 799 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request, 800 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 801 } 802 #endif 803 #if defined(CONFIG_X86) 804 typedef struct drm_update_draw32 { 805 drm_drawable_t handle; 806 unsigned int type; 807 unsigned int num; 808 /* 64-bit version has a 32-bit pad here */ 809 u64 data; /**< Pointer */ 810 } __attribute__((packed)) drm_update_draw32_t; 811 812 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 813 unsigned long arg) 814 { 815 drm_update_draw32_t update32; 816 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32))) 817 return -EFAULT; 818 819 return drm_ioctl_kernel(file, drm_noop, NULL, 820 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 821 } 822 #endif 823 824 struct drm_wait_vblank_request32 { 825 enum drm_vblank_seq_type type; 826 unsigned int sequence; 827 u32 signal; 828 }; 829 830 struct drm_wait_vblank_reply32 { 831 enum drm_vblank_seq_type type; 832 unsigned int sequence; 833 s32 tval_sec; 834 s32 tval_usec; 835 }; 836 837 typedef union drm_wait_vblank32 { 838 struct drm_wait_vblank_request32 request; 839 struct drm_wait_vblank_reply32 reply; 840 } drm_wait_vblank32_t; 841 842 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, 843 unsigned long arg) 844 { 845 drm_wait_vblank32_t __user *argp = (void __user *)arg; 846 drm_wait_vblank32_t req32; 847 union drm_wait_vblank req; 848 int err; 849 850 if (copy_from_user(&req32, argp, sizeof(req32))) 851 return -EFAULT; 852 853 req.request.type = req32.request.type; 854 req.request.sequence = req32.request.sequence; 855 req.request.signal = req32.request.signal; 856 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED); 857 if (err) 858 return err; 859 860 req32.reply.type = req.reply.type; 861 req32.reply.sequence = req.reply.sequence; 862 req32.reply.tval_sec = req.reply.tval_sec; 863 req32.reply.tval_usec = req.reply.tval_usec; 864 if (copy_to_user(argp, &req32, sizeof(req32))) 865 return -EFAULT; 866 867 return 0; 868 } 869 870 #if defined(CONFIG_X86) 871 typedef struct drm_mode_fb_cmd232 { 872 u32 fb_id; 873 u32 width; 874 u32 height; 875 u32 pixel_format; 876 u32 flags; 877 u32 handles[4]; 878 u32 pitches[4]; 879 u32 offsets[4]; 880 u64 modifier[4]; 881 } __attribute__((packed)) drm_mode_fb_cmd232_t; 882 883 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, 884 unsigned long arg) 885 { 886 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; 887 struct drm_mode_fb_cmd2 req64; 888 int err; 889 890 if (copy_from_user(&req64, argp, 891 offsetof(drm_mode_fb_cmd232_t, modifier))) 892 return -EFAULT; 893 894 if (copy_from_user(&req64.modifier, &argp->modifier, 895 sizeof(req64.modifier))) 896 return -EFAULT; 897 898 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 899 DRM_UNLOCKED); 900 if (err) 901 return err; 902 903 if (put_user(req64.fb_id, &argp->fb_id)) 904 return -EFAULT; 905 906 return 0; 907 } 908 #endif 909 910 static struct { 911 drm_ioctl_compat_t *fn; 912 char *name; 913 } drm_compat_ioctls[] = { 914 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n} 915 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version), 916 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique), 917 #if IS_ENABLED(CONFIG_DRM_LEGACY) 918 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap), 919 #endif 920 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient), 921 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats), 922 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique), 923 #if IS_ENABLED(CONFIG_DRM_LEGACY) 924 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap), 925 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs), 926 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs), 927 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs), 928 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs), 929 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs), 930 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap), 931 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx), 932 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx), 933 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx), 934 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma), 935 #endif 936 #if IS_ENABLED(CONFIG_AGP) 937 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable), 938 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info), 939 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc), 940 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free), 941 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind), 942 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind), 943 #endif 944 #if IS_ENABLED(CONFIG_DRM_LEGACY) 945 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc), 946 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free), 947 #endif 948 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 949 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw), 950 #endif 951 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank), 952 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 953 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2), 954 #endif 955 }; 956 957 /** 958 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers 959 * @filp: file this ioctl is called on 960 * @cmd: ioctl cmd number 961 * @arg: user argument 962 * 963 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual 964 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as 965 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has 966 * botched IOCTL itself, it must handle those by wrapping this function. 967 * 968 * Returns: 969 * Zero on success, negative error code on failure. 970 */ 971 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 972 { 973 unsigned int nr = DRM_IOCTL_NR(cmd); 974 struct drm_file *file_priv = filp->private_data; 975 drm_ioctl_compat_t *fn; 976 int ret; 977 978 /* Assume that ioctls without an explicit compat routine will just 979 * work. This may not always be a good assumption, but it's better 980 * than always failing. 981 */ 982 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 983 return drm_ioctl(filp, cmd, arg); 984 985 fn = drm_compat_ioctls[nr].fn; 986 if (!fn) 987 return drm_ioctl(filp, cmd, arg); 988 989 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", 990 task_pid_nr(current), 991 (long)old_encode_dev(file_priv->minor->kdev->devt), 992 file_priv->authenticated, 993 drm_compat_ioctls[nr].name); 994 ret = (*fn)(filp, cmd, arg); 995 if (ret) 996 DRM_DEBUG("ret = %d\n", ret); 997 return ret; 998 } 999 EXPORT_SYMBOL(drm_compat_ioctl); 1000