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_file.h> 35 #include <drm/drm_print.h> 36 37 #include "drm_crtc_internal.h" 38 #include "drm_internal.h" 39 #include "drm_legacy.h" 40 41 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t) 42 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t) 43 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t) 44 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t) 45 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t) 46 47 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t) 48 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t) 49 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t) 50 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t) 51 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t) 52 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t) 53 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t) 54 55 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t) 56 57 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t) 58 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t) 59 60 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t) 61 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t) 62 63 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t) 64 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t) 65 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t) 66 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t) 67 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t) 68 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t) 69 70 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t) 71 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t) 72 73 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t) 74 75 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t) 76 77 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t) 78 79 typedef struct drm_version_32 { 80 int version_major; /* Major version */ 81 int version_minor; /* Minor version */ 82 int version_patchlevel; /* Patch level */ 83 u32 name_len; /* Length of name buffer */ 84 u32 name; /* Name of driver */ 85 u32 date_len; /* Length of date buffer */ 86 u32 date; /* User-space buffer to hold date */ 87 u32 desc_len; /* Length of desc buffer */ 88 u32 desc; /* User-space buffer to hold desc */ 89 } drm_version32_t; 90 91 static int compat_drm_version(struct file *file, unsigned int cmd, 92 unsigned long arg) 93 { 94 drm_version32_t v32; 95 struct drm_version v; 96 int err; 97 98 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32))) 99 return -EFAULT; 100 101 memset(&v, 0, sizeof(v)); 102 103 v = (struct drm_version) { 104 .name_len = v32.name_len, 105 .name = compat_ptr(v32.name), 106 .date_len = v32.date_len, 107 .date = compat_ptr(v32.date), 108 .desc_len = v32.desc_len, 109 .desc = compat_ptr(v32.desc), 110 }; 111 err = drm_ioctl_kernel(file, drm_version, &v, 112 DRM_RENDER_ALLOW); 113 if (err) 114 return err; 115 116 v32.version_major = v.version_major; 117 v32.version_minor = v.version_minor; 118 v32.version_patchlevel = v.version_patchlevel; 119 v32.name_len = v.name_len; 120 v32.date_len = v.date_len; 121 v32.desc_len = v.desc_len; 122 if (copy_to_user((void __user *)arg, &v32, sizeof(v32))) 123 return -EFAULT; 124 return 0; 125 } 126 127 typedef struct drm_unique32 { 128 u32 unique_len; /* Length of unique */ 129 u32 unique; /* Unique name for driver instantiation */ 130 } drm_unique32_t; 131 132 static int compat_drm_getunique(struct file *file, unsigned int cmd, 133 unsigned long arg) 134 { 135 drm_unique32_t uq32; 136 struct drm_unique uq; 137 int err; 138 139 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 140 return -EFAULT; 141 142 memset(&uq, 0, sizeof(uq)); 143 144 uq = (struct drm_unique){ 145 .unique_len = uq32.unique_len, 146 .unique = compat_ptr(uq32.unique), 147 }; 148 149 err = drm_ioctl_kernel(file, drm_getunique, &uq, 0); 150 if (err) 151 return err; 152 153 uq32.unique_len = uq.unique_len; 154 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) 155 return -EFAULT; 156 return 0; 157 } 158 159 static int compat_drm_setunique(struct file *file, unsigned int cmd, 160 unsigned long arg) 161 { 162 /* it's dead */ 163 return -EINVAL; 164 } 165 166 #if IS_ENABLED(CONFIG_DRM_LEGACY) 167 typedef struct drm_map32 { 168 u32 offset; /* Requested physical address (0 for SAREA) */ 169 u32 size; /* Requested physical size (bytes) */ 170 enum drm_map_type type; /* Type of memory to map */ 171 enum drm_map_flags flags; /* Flags */ 172 u32 handle; /* User-space: "Handle" to pass to mmap() */ 173 int mtrr; /* MTRR slot used */ 174 } drm_map32_t; 175 176 static int compat_drm_getmap(struct file *file, unsigned int cmd, 177 unsigned long arg) 178 { 179 drm_map32_t __user *argp = (void __user *)arg; 180 drm_map32_t m32; 181 struct drm_map map; 182 int err; 183 184 if (copy_from_user(&m32, argp, sizeof(m32))) 185 return -EFAULT; 186 187 map.offset = m32.offset; 188 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, 0); 189 if (err) 190 return err; 191 192 m32.offset = map.offset; 193 m32.size = map.size; 194 m32.type = map.type; 195 m32.flags = map.flags; 196 m32.handle = ptr_to_compat((void __user *)map.handle); 197 m32.mtrr = map.mtrr; 198 if (copy_to_user(argp, &m32, sizeof(m32))) 199 return -EFAULT; 200 return 0; 201 202 } 203 204 static int compat_drm_addmap(struct file *file, unsigned int cmd, 205 unsigned long arg) 206 { 207 drm_map32_t __user *argp = (void __user *)arg; 208 drm_map32_t m32; 209 struct drm_map map; 210 int err; 211 212 if (copy_from_user(&m32, argp, sizeof(m32))) 213 return -EFAULT; 214 215 map.offset = m32.offset; 216 map.size = m32.size; 217 map.type = m32.type; 218 map.flags = m32.flags; 219 220 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map, 221 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 222 if (err) 223 return err; 224 225 m32.offset = map.offset; 226 m32.mtrr = map.mtrr; 227 m32.handle = ptr_to_compat((void __user *)map.handle); 228 if (map.handle != compat_ptr(m32.handle)) 229 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n", 230 map.handle, m32.type, m32.offset); 231 232 if (copy_to_user(argp, &m32, sizeof(m32))) 233 return -EFAULT; 234 235 return 0; 236 } 237 238 static int compat_drm_rmmap(struct file *file, unsigned int cmd, 239 unsigned long arg) 240 { 241 drm_map32_t __user *argp = (void __user *)arg; 242 struct drm_map map; 243 u32 handle; 244 245 if (get_user(handle, &argp->handle)) 246 return -EFAULT; 247 map.handle = compat_ptr(handle); 248 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH); 249 } 250 #endif 251 252 typedef struct drm_client32 { 253 int idx; /* Which client desired? */ 254 int auth; /* Is client authenticated? */ 255 u32 pid; /* Process ID */ 256 u32 uid; /* User ID */ 257 u32 magic; /* Magic */ 258 u32 iocs; /* Ioctl count */ 259 } drm_client32_t; 260 261 static int compat_drm_getclient(struct file *file, unsigned int cmd, 262 unsigned long arg) 263 { 264 drm_client32_t c32; 265 drm_client32_t __user *argp = (void __user *)arg; 266 struct drm_client client; 267 int err; 268 269 if (copy_from_user(&c32, argp, sizeof(c32))) 270 return -EFAULT; 271 272 memset(&client, 0, sizeof(client)); 273 274 client.idx = c32.idx; 275 276 err = drm_ioctl_kernel(file, drm_getclient, &client, 0); 277 if (err) 278 return err; 279 280 c32.idx = client.idx; 281 c32.auth = client.auth; 282 c32.pid = client.pid; 283 c32.uid = client.uid; 284 c32.magic = client.magic; 285 c32.iocs = client.iocs; 286 287 if (copy_to_user(argp, &c32, sizeof(c32))) 288 return -EFAULT; 289 return 0; 290 } 291 292 typedef struct drm_stats32 { 293 u32 count; 294 struct { 295 u32 value; 296 enum drm_stat_type type; 297 } data[15]; 298 } drm_stats32_t; 299 300 static int compat_drm_getstats(struct file *file, unsigned int cmd, 301 unsigned long arg) 302 { 303 drm_stats32_t __user *argp = (void __user *)arg; 304 305 /* getstats is defunct, just clear */ 306 if (clear_user(argp, sizeof(drm_stats32_t))) 307 return -EFAULT; 308 return 0; 309 } 310 311 #if IS_ENABLED(CONFIG_DRM_LEGACY) 312 typedef struct drm_buf_desc32 { 313 int count; /* Number of buffers of this size */ 314 int size; /* Size in bytes */ 315 int low_mark; /* Low water mark */ 316 int high_mark; /* High water mark */ 317 int flags; 318 u32 agp_start; /* Start address in the AGP aperture */ 319 } drm_buf_desc32_t; 320 321 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 322 unsigned long arg) 323 { 324 drm_buf_desc32_t __user *argp = (void __user *)arg; 325 drm_buf_desc32_t desc32; 326 struct drm_buf_desc desc; 327 int err; 328 329 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t))) 330 return -EFAULT; 331 332 desc = (struct drm_buf_desc){ 333 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark, 334 desc32.flags, desc32.agp_start 335 }; 336 337 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc, 338 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 339 if (err) 340 return err; 341 342 desc32 = (drm_buf_desc32_t){ 343 desc.count, desc.size, desc.low_mark, desc.high_mark, 344 desc.flags, desc.agp_start 345 }; 346 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t))) 347 return -EFAULT; 348 349 return 0; 350 } 351 352 static int compat_drm_markbufs(struct file *file, unsigned int cmd, 353 unsigned long arg) 354 { 355 drm_buf_desc32_t b32; 356 drm_buf_desc32_t __user *argp = (void __user *)arg; 357 struct drm_buf_desc buf; 358 359 if (copy_from_user(&b32, argp, sizeof(b32))) 360 return -EFAULT; 361 362 buf.size = b32.size; 363 buf.low_mark = b32.low_mark; 364 buf.high_mark = b32.high_mark; 365 366 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf, 367 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 368 } 369 370 typedef struct drm_buf_info32 { 371 int count; /**< Entries in list */ 372 u32 list; 373 } drm_buf_info32_t; 374 375 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from) 376 { 377 drm_buf_info32_t *request = data; 378 drm_buf_desc32_t __user *to = compat_ptr(request->list); 379 drm_buf_desc32_t v = {.count = from->buf_count, 380 .size = from->buf_size, 381 .low_mark = from->low_mark, 382 .high_mark = from->high_mark}; 383 384 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags))) 385 return -EFAULT; 386 return 0; 387 } 388 389 static int drm_legacy_infobufs32(struct drm_device *dev, void *data, 390 struct drm_file *file_priv) 391 { 392 drm_buf_info32_t *request = data; 393 394 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32); 395 } 396 397 static int compat_drm_infobufs(struct file *file, unsigned int cmd, 398 unsigned long arg) 399 { 400 drm_buf_info32_t req32; 401 drm_buf_info32_t __user *argp = (void __user *)arg; 402 int err; 403 404 if (copy_from_user(&req32, argp, sizeof(req32))) 405 return -EFAULT; 406 407 if (req32.count < 0) 408 req32.count = 0; 409 410 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH); 411 if (err) 412 return err; 413 414 if (put_user(req32.count, &argp->count)) 415 return -EFAULT; 416 417 return 0; 418 } 419 420 typedef struct drm_buf_pub32 { 421 int idx; /**< Index into the master buffer list */ 422 int total; /**< Buffer size */ 423 int used; /**< Amount of buffer in use (for DMA) */ 424 u32 address; /**< Address of buffer */ 425 } drm_buf_pub32_t; 426 427 typedef struct drm_buf_map32 { 428 int count; /**< Length of the buffer list */ 429 u32 virtual; /**< Mmap'd area in user-virtual */ 430 u32 list; /**< Buffer information */ 431 } drm_buf_map32_t; 432 433 static int map_one_buf32(void *data, int idx, unsigned long virtual, 434 struct drm_buf *buf) 435 { 436 drm_buf_map32_t *request = data; 437 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx; 438 drm_buf_pub32_t v; 439 440 v.idx = buf->idx; 441 v.total = buf->total; 442 v.used = 0; 443 v.address = virtual + buf->offset; 444 if (copy_to_user(to, &v, sizeof(v))) 445 return -EFAULT; 446 return 0; 447 } 448 449 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data, 450 struct drm_file *file_priv) 451 { 452 drm_buf_map32_t *request = data; 453 void __user *v; 454 int err = __drm_legacy_mapbufs(dev, data, &request->count, 455 &v, map_one_buf32, 456 file_priv); 457 request->virtual = ptr_to_compat(v); 458 return err; 459 } 460 461 static int compat_drm_mapbufs(struct file *file, unsigned int cmd, 462 unsigned long arg) 463 { 464 drm_buf_map32_t __user *argp = (void __user *)arg; 465 drm_buf_map32_t req32; 466 int err; 467 468 if (copy_from_user(&req32, argp, sizeof(req32))) 469 return -EFAULT; 470 if (req32.count < 0) 471 return -EINVAL; 472 473 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH); 474 if (err) 475 return err; 476 477 if (put_user(req32.count, &argp->count) 478 || put_user(req32.virtual, &argp->virtual)) 479 return -EFAULT; 480 481 return 0; 482 } 483 484 typedef struct drm_buf_free32 { 485 int count; 486 u32 list; 487 } drm_buf_free32_t; 488 489 static int compat_drm_freebufs(struct file *file, unsigned int cmd, 490 unsigned long arg) 491 { 492 drm_buf_free32_t req32; 493 struct drm_buf_free request; 494 drm_buf_free32_t __user *argp = (void __user *)arg; 495 496 if (copy_from_user(&req32, argp, sizeof(req32))) 497 return -EFAULT; 498 499 request.count = req32.count; 500 request.list = compat_ptr(req32.list); 501 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH); 502 } 503 504 typedef struct drm_ctx_priv_map32 { 505 unsigned int ctx_id; /**< Context requesting private mapping */ 506 u32 handle; /**< Handle of map */ 507 } drm_ctx_priv_map32_t; 508 509 static int compat_drm_setsareactx(struct file *file, unsigned int cmd, 510 unsigned long arg) 511 { 512 drm_ctx_priv_map32_t req32; 513 struct drm_ctx_priv_map request; 514 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 515 516 if (copy_from_user(&req32, argp, sizeof(req32))) 517 return -EFAULT; 518 519 request.ctx_id = req32.ctx_id; 520 request.handle = compat_ptr(req32.handle); 521 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request, 522 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 523 } 524 525 static int compat_drm_getsareactx(struct file *file, unsigned int cmd, 526 unsigned long arg) 527 { 528 struct drm_ctx_priv_map req; 529 drm_ctx_priv_map32_t req32; 530 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 531 int err; 532 533 if (copy_from_user(&req32, argp, sizeof(req32))) 534 return -EFAULT; 535 536 req.ctx_id = req32.ctx_id; 537 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH); 538 if (err) 539 return err; 540 541 req32.handle = ptr_to_compat((void __user *)req.handle); 542 if (copy_to_user(argp, &req32, sizeof(req32))) 543 return -EFAULT; 544 545 return 0; 546 } 547 548 typedef struct drm_ctx_res32 { 549 int count; 550 u32 contexts; 551 } drm_ctx_res32_t; 552 553 static int compat_drm_resctx(struct file *file, unsigned int cmd, 554 unsigned long arg) 555 { 556 drm_ctx_res32_t __user *argp = (void __user *)arg; 557 drm_ctx_res32_t res32; 558 struct drm_ctx_res res; 559 int err; 560 561 if (copy_from_user(&res32, argp, sizeof(res32))) 562 return -EFAULT; 563 564 res.count = res32.count; 565 res.contexts = compat_ptr(res32.contexts); 566 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH); 567 if (err) 568 return err; 569 570 res32.count = res.count; 571 if (copy_to_user(argp, &res32, sizeof(res32))) 572 return -EFAULT; 573 574 return 0; 575 } 576 577 typedef struct drm_dma32 { 578 int context; /**< Context handle */ 579 int send_count; /**< Number of buffers to send */ 580 u32 send_indices; /**< List of handles to buffers */ 581 u32 send_sizes; /**< Lengths of data to send */ 582 enum drm_dma_flags flags; /**< Flags */ 583 int request_count; /**< Number of buffers requested */ 584 int request_size; /**< Desired size for buffers */ 585 u32 request_indices; /**< Buffer information */ 586 u32 request_sizes; 587 int granted_count; /**< Number of buffers granted */ 588 } drm_dma32_t; 589 590 static int compat_drm_dma(struct file *file, unsigned int cmd, 591 unsigned long arg) 592 { 593 drm_dma32_t d32; 594 drm_dma32_t __user *argp = (void __user *)arg; 595 struct drm_dma d; 596 int err; 597 598 if (copy_from_user(&d32, argp, sizeof(d32))) 599 return -EFAULT; 600 601 d.context = d32.context; 602 d.send_count = d32.send_count; 603 d.send_indices = compat_ptr(d32.send_indices); 604 d.send_sizes = compat_ptr(d32.send_sizes); 605 d.flags = d32.flags; 606 d.request_count = d32.request_count; 607 d.request_indices = compat_ptr(d32.request_indices); 608 d.request_sizes = compat_ptr(d32.request_sizes); 609 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH); 610 if (err) 611 return err; 612 613 if (put_user(d.request_size, &argp->request_size) 614 || put_user(d.granted_count, &argp->granted_count)) 615 return -EFAULT; 616 617 return 0; 618 } 619 #endif 620 621 #if IS_ENABLED(CONFIG_DRM_LEGACY) 622 #if IS_ENABLED(CONFIG_AGP) 623 typedef struct drm_agp_mode32 { 624 u32 mode; /**< AGP mode */ 625 } drm_agp_mode32_t; 626 627 static int compat_drm_agp_enable(struct file *file, unsigned int cmd, 628 unsigned long arg) 629 { 630 drm_agp_mode32_t __user *argp = (void __user *)arg; 631 struct drm_agp_mode mode; 632 633 if (get_user(mode.mode, &argp->mode)) 634 return -EFAULT; 635 636 return drm_ioctl_kernel(file, drm_legacy_agp_enable_ioctl, &mode, 637 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 638 } 639 640 typedef struct drm_agp_info32 { 641 int agp_version_major; 642 int agp_version_minor; 643 u32 mode; 644 u32 aperture_base; /* physical address */ 645 u32 aperture_size; /* bytes */ 646 u32 memory_allowed; /* bytes */ 647 u32 memory_used; 648 649 /* PCI information */ 650 unsigned short id_vendor; 651 unsigned short id_device; 652 } drm_agp_info32_t; 653 654 static int compat_drm_agp_info(struct file *file, unsigned int cmd, 655 unsigned long arg) 656 { 657 drm_agp_info32_t __user *argp = (void __user *)arg; 658 drm_agp_info32_t i32; 659 struct drm_agp_info info; 660 int err; 661 662 err = drm_ioctl_kernel(file, drm_legacy_agp_info_ioctl, &info, DRM_AUTH); 663 if (err) 664 return err; 665 666 i32.agp_version_major = info.agp_version_major; 667 i32.agp_version_minor = info.agp_version_minor; 668 i32.mode = info.mode; 669 i32.aperture_base = info.aperture_base; 670 i32.aperture_size = info.aperture_size; 671 i32.memory_allowed = info.memory_allowed; 672 i32.memory_used = info.memory_used; 673 i32.id_vendor = info.id_vendor; 674 i32.id_device = info.id_device; 675 if (copy_to_user(argp, &i32, sizeof(i32))) 676 return -EFAULT; 677 678 return 0; 679 } 680 681 typedef struct drm_agp_buffer32 { 682 u32 size; /**< In bytes -- will round to page boundary */ 683 u32 handle; /**< Used for binding / unbinding */ 684 u32 type; /**< Type of memory to allocate */ 685 u32 physical; /**< Physical used by i810 */ 686 } drm_agp_buffer32_t; 687 688 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd, 689 unsigned long arg) 690 { 691 drm_agp_buffer32_t __user *argp = (void __user *)arg; 692 drm_agp_buffer32_t req32; 693 struct drm_agp_buffer request; 694 int err; 695 696 if (copy_from_user(&req32, argp, sizeof(req32))) 697 return -EFAULT; 698 699 request.size = req32.size; 700 request.type = req32.type; 701 err = drm_ioctl_kernel(file, drm_legacy_agp_alloc_ioctl, &request, 702 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 703 if (err) 704 return err; 705 706 req32.handle = request.handle; 707 req32.physical = request.physical; 708 if (copy_to_user(argp, &req32, sizeof(req32))) { 709 drm_ioctl_kernel(file, drm_legacy_agp_free_ioctl, &request, 710 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 711 return -EFAULT; 712 } 713 714 return 0; 715 } 716 717 static int compat_drm_agp_free(struct file *file, unsigned int cmd, 718 unsigned long arg) 719 { 720 drm_agp_buffer32_t __user *argp = (void __user *)arg; 721 struct drm_agp_buffer request; 722 723 if (get_user(request.handle, &argp->handle)) 724 return -EFAULT; 725 726 return drm_ioctl_kernel(file, drm_legacy_agp_free_ioctl, &request, 727 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 728 } 729 730 typedef struct drm_agp_binding32 { 731 u32 handle; /**< From drm_agp_buffer */ 732 u32 offset; /**< In bytes -- will round to page boundary */ 733 } drm_agp_binding32_t; 734 735 static int compat_drm_agp_bind(struct file *file, unsigned int cmd, 736 unsigned long arg) 737 { 738 drm_agp_binding32_t __user *argp = (void __user *)arg; 739 drm_agp_binding32_t req32; 740 struct drm_agp_binding request; 741 742 if (copy_from_user(&req32, argp, sizeof(req32))) 743 return -EFAULT; 744 745 request.handle = req32.handle; 746 request.offset = req32.offset; 747 return drm_ioctl_kernel(file, drm_legacy_agp_bind_ioctl, &request, 748 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 749 } 750 751 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd, 752 unsigned long arg) 753 { 754 drm_agp_binding32_t __user *argp = (void __user *)arg; 755 struct drm_agp_binding request; 756 757 if (get_user(request.handle, &argp->handle)) 758 return -EFAULT; 759 760 return drm_ioctl_kernel(file, drm_legacy_agp_unbind_ioctl, &request, 761 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 762 } 763 #endif /* CONFIG_AGP */ 764 765 typedef struct drm_scatter_gather32 { 766 u32 size; /**< In bytes -- will round to page boundary */ 767 u32 handle; /**< Used for mapping / unmapping */ 768 } drm_scatter_gather32_t; 769 770 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd, 771 unsigned long arg) 772 { 773 drm_scatter_gather32_t __user *argp = (void __user *)arg; 774 struct drm_scatter_gather request; 775 int err; 776 777 if (get_user(request.size, &argp->size)) 778 return -EFAULT; 779 780 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request, 781 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 782 if (err) 783 return err; 784 785 /* XXX not sure about the handle conversion here... */ 786 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle)) 787 return -EFAULT; 788 789 return 0; 790 } 791 792 static int compat_drm_sg_free(struct file *file, unsigned int cmd, 793 unsigned long arg) 794 { 795 drm_scatter_gather32_t __user *argp = (void __user *)arg; 796 struct drm_scatter_gather request; 797 unsigned long x; 798 799 if (get_user(x, &argp->handle)) 800 return -EFAULT; 801 request.handle = x << PAGE_SHIFT; 802 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request, 803 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 804 } 805 #endif 806 #if defined(CONFIG_X86) 807 typedef struct drm_update_draw32 { 808 drm_drawable_t handle; 809 unsigned int type; 810 unsigned int num; 811 /* 64-bit version has a 32-bit pad here */ 812 u64 data; /**< Pointer */ 813 } __attribute__((packed)) drm_update_draw32_t; 814 815 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 816 unsigned long arg) 817 { 818 /* update_draw is defunct */ 819 return 0; 820 } 821 #endif 822 823 struct drm_wait_vblank_request32 { 824 enum drm_vblank_seq_type type; 825 unsigned int sequence; 826 u32 signal; 827 }; 828 829 struct drm_wait_vblank_reply32 { 830 enum drm_vblank_seq_type type; 831 unsigned int sequence; 832 s32 tval_sec; 833 s32 tval_usec; 834 }; 835 836 typedef union drm_wait_vblank32 { 837 struct drm_wait_vblank_request32 request; 838 struct drm_wait_vblank_reply32 reply; 839 } drm_wait_vblank32_t; 840 841 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd, 842 unsigned long arg) 843 { 844 drm_wait_vblank32_t __user *argp = (void __user *)arg; 845 drm_wait_vblank32_t req32; 846 union drm_wait_vblank req; 847 int err; 848 849 if (copy_from_user(&req32, argp, sizeof(req32))) 850 return -EFAULT; 851 852 memset(&req, 0, sizeof(req)); 853 854 req.request.type = req32.request.type; 855 req.request.sequence = req32.request.sequence; 856 req.request.signal = req32.request.signal; 857 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED); 858 859 req32.reply.type = req.reply.type; 860 req32.reply.sequence = req.reply.sequence; 861 req32.reply.tval_sec = req.reply.tval_sec; 862 req32.reply.tval_usec = req.reply.tval_usec; 863 if (copy_to_user(argp, &req32, sizeof(req32))) 864 return -EFAULT; 865 866 return err; 867 } 868 869 #if defined(CONFIG_X86) 870 typedef struct drm_mode_fb_cmd232 { 871 u32 fb_id; 872 u32 width; 873 u32 height; 874 u32 pixel_format; 875 u32 flags; 876 u32 handles[4]; 877 u32 pitches[4]; 878 u32 offsets[4]; 879 u64 modifier[4]; 880 } __attribute__((packed)) drm_mode_fb_cmd232_t; 881 882 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, 883 unsigned long arg) 884 { 885 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; 886 struct drm_mode_fb_cmd2 req64; 887 int err; 888 889 memset(&req64, 0, sizeof(req64)); 890 891 if (copy_from_user(&req64, argp, 892 offsetof(drm_mode_fb_cmd232_t, modifier))) 893 return -EFAULT; 894 895 if (copy_from_user(&req64.modifier, &argp->modifier, 896 sizeof(req64.modifier))) 897 return -EFAULT; 898 899 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0); 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 #if IS_ENABLED(CONFIG_AGP) 936 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable), 937 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info), 938 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc), 939 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free), 940 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind), 941 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind), 942 #endif 943 #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 struct drm_device *dev = file_priv->minor->dev; 976 drm_ioctl_compat_t *fn; 977 int ret; 978 979 /* Assume that ioctls without an explicit compat routine will just 980 * work. This may not always be a good assumption, but it's better 981 * than always failing. 982 */ 983 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 984 return drm_ioctl(filp, cmd, arg); 985 986 fn = drm_compat_ioctls[nr].fn; 987 if (!fn) 988 return drm_ioctl(filp, cmd, arg); 989 990 drm_dbg_core(dev, "comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n", 991 current->comm, task_pid_nr(current), 992 (long)old_encode_dev(file_priv->minor->kdev->devt), 993 file_priv->authenticated, 994 drm_compat_ioctls[nr].name); 995 ret = (*fn)(filp, cmd, arg); 996 if (ret) 997 drm_dbg_core(dev, "ret = %d\n", ret); 998 return ret; 999 } 1000 EXPORT_SYMBOL(drm_compat_ioctl); 1001