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 memset(&v, 0, sizeof(v)); 103 104 v = (struct drm_version) { 105 .name_len = v32.name_len, 106 .name = compat_ptr(v32.name), 107 .date_len = v32.date_len, 108 .date = compat_ptr(v32.date), 109 .desc_len = v32.desc_len, 110 .desc = compat_ptr(v32.desc), 111 }; 112 err = drm_ioctl_kernel(file, drm_version, &v, 113 DRM_RENDER_ALLOW); 114 if (err) 115 return err; 116 117 v32.version_major = v.version_major; 118 v32.version_minor = v.version_minor; 119 v32.version_patchlevel = v.version_patchlevel; 120 v32.name_len = v.name_len; 121 v32.date_len = v.date_len; 122 v32.desc_len = v.desc_len; 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 uq; 138 int err; 139 140 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32))) 141 return -EFAULT; 142 143 memset(&uq, 0, sizeof(uq)); 144 145 uq = (struct drm_unique){ 146 .unique_len = uq32.unique_len, 147 .unique = compat_ptr(uq32.unique), 148 }; 149 150 err = drm_ioctl_kernel(file, drm_getunique, &uq, 0); 151 if (err) 152 return err; 153 154 uq32.unique_len = uq.unique_len; 155 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32))) 156 return -EFAULT; 157 return 0; 158 } 159 160 static int compat_drm_setunique(struct file *file, unsigned int cmd, 161 unsigned long arg) 162 { 163 /* it's dead */ 164 return -EINVAL; 165 } 166 167 #if IS_ENABLED(CONFIG_DRM_LEGACY) 168 typedef struct drm_map32 { 169 u32 offset; /* Requested physical address (0 for SAREA) */ 170 u32 size; /* Requested physical size (bytes) */ 171 enum drm_map_type type; /* Type of memory to map */ 172 enum drm_map_flags flags; /* Flags */ 173 u32 handle; /* User-space: "Handle" to pass to mmap() */ 174 int mtrr; /* MTRR slot used */ 175 } drm_map32_t; 176 177 static int compat_drm_getmap(struct file *file, unsigned int cmd, 178 unsigned long arg) 179 { 180 drm_map32_t __user *argp = (void __user *)arg; 181 drm_map32_t m32; 182 struct drm_map map; 183 int err; 184 185 if (copy_from_user(&m32, argp, sizeof(m32))) 186 return -EFAULT; 187 188 map.offset = m32.offset; 189 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, 0); 190 if (err) 191 return err; 192 193 m32.offset = map.offset; 194 m32.size = map.size; 195 m32.type = map.type; 196 m32.flags = map.flags; 197 m32.handle = ptr_to_compat((void __user *)map.handle); 198 m32.mtrr = map.mtrr; 199 if (copy_to_user(argp, &m32, sizeof(m32))) 200 return -EFAULT; 201 return 0; 202 203 } 204 205 static int compat_drm_addmap(struct file *file, unsigned int cmd, 206 unsigned long arg) 207 { 208 drm_map32_t __user *argp = (void __user *)arg; 209 drm_map32_t m32; 210 struct drm_map map; 211 int err; 212 213 if (copy_from_user(&m32, argp, sizeof(m32))) 214 return -EFAULT; 215 216 map.offset = m32.offset; 217 map.size = m32.size; 218 map.type = m32.type; 219 map.flags = m32.flags; 220 221 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map, 222 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 223 if (err) 224 return err; 225 226 m32.offset = map.offset; 227 m32.mtrr = map.mtrr; 228 m32.handle = ptr_to_compat((void __user *)map.handle); 229 if (map.handle != compat_ptr(m32.handle)) 230 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n", 231 map.handle, m32.type, m32.offset); 232 233 if (copy_to_user(argp, &m32, sizeof(m32))) 234 return -EFAULT; 235 236 return 0; 237 } 238 239 static int compat_drm_rmmap(struct file *file, unsigned int cmd, 240 unsigned long arg) 241 { 242 drm_map32_t __user *argp = (void __user *)arg; 243 struct drm_map map; 244 u32 handle; 245 246 if (get_user(handle, &argp->handle)) 247 return -EFAULT; 248 map.handle = compat_ptr(handle); 249 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH); 250 } 251 #endif 252 253 typedef struct drm_client32 { 254 int idx; /* Which client desired? */ 255 int auth; /* Is client authenticated? */ 256 u32 pid; /* Process ID */ 257 u32 uid; /* User ID */ 258 u32 magic; /* Magic */ 259 u32 iocs; /* Ioctl count */ 260 } drm_client32_t; 261 262 static int compat_drm_getclient(struct file *file, unsigned int cmd, 263 unsigned long arg) 264 { 265 drm_client32_t c32; 266 drm_client32_t __user *argp = (void __user *)arg; 267 struct drm_client client; 268 int err; 269 270 if (copy_from_user(&c32, argp, sizeof(c32))) 271 return -EFAULT; 272 273 memset(&client, 0, sizeof(client)); 274 275 client.idx = c32.idx; 276 277 err = drm_ioctl_kernel(file, drm_getclient, &client, 0); 278 if (err) 279 return err; 280 281 c32.idx = client.idx; 282 c32.auth = client.auth; 283 c32.pid = client.pid; 284 c32.uid = client.uid; 285 c32.magic = client.magic; 286 c32.iocs = client.iocs; 287 288 if (copy_to_user(argp, &c32, sizeof(c32))) 289 return -EFAULT; 290 return 0; 291 } 292 293 typedef struct drm_stats32 { 294 u32 count; 295 struct { 296 u32 value; 297 enum drm_stat_type type; 298 } data[15]; 299 } drm_stats32_t; 300 301 static int compat_drm_getstats(struct file *file, unsigned int cmd, 302 unsigned long arg) 303 { 304 drm_stats32_t __user *argp = (void __user *)arg; 305 306 /* getstats is defunct, just clear */ 307 if (clear_user(argp, sizeof(drm_stats32_t))) 308 return -EFAULT; 309 return 0; 310 } 311 312 #if IS_ENABLED(CONFIG_DRM_LEGACY) 313 typedef struct drm_buf_desc32 { 314 int count; /* Number of buffers of this size */ 315 int size; /* Size in bytes */ 316 int low_mark; /* Low water mark */ 317 int high_mark; /* High water mark */ 318 int flags; 319 u32 agp_start; /* Start address in the AGP aperture */ 320 } drm_buf_desc32_t; 321 322 static int compat_drm_addbufs(struct file *file, unsigned int cmd, 323 unsigned long arg) 324 { 325 drm_buf_desc32_t __user *argp = (void __user *)arg; 326 drm_buf_desc32_t desc32; 327 struct drm_buf_desc desc; 328 int err; 329 330 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t))) 331 return -EFAULT; 332 333 desc = (struct drm_buf_desc){ 334 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark, 335 desc32.flags, desc32.agp_start 336 }; 337 338 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc, 339 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 340 if (err) 341 return err; 342 343 desc32 = (drm_buf_desc32_t){ 344 desc.count, desc.size, desc.low_mark, desc.high_mark, 345 desc.flags, desc.agp_start 346 }; 347 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t))) 348 return -EFAULT; 349 350 return 0; 351 } 352 353 static int compat_drm_markbufs(struct file *file, unsigned int cmd, 354 unsigned long arg) 355 { 356 drm_buf_desc32_t b32; 357 drm_buf_desc32_t __user *argp = (void __user *)arg; 358 struct drm_buf_desc buf; 359 360 if (copy_from_user(&b32, argp, sizeof(b32))) 361 return -EFAULT; 362 363 buf.size = b32.size; 364 buf.low_mark = b32.low_mark; 365 buf.high_mark = b32.high_mark; 366 367 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf, 368 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 369 } 370 371 typedef struct drm_buf_info32 { 372 int count; /**< Entries in list */ 373 u32 list; 374 } drm_buf_info32_t; 375 376 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from) 377 { 378 drm_buf_info32_t *request = data; 379 drm_buf_desc32_t __user *to = compat_ptr(request->list); 380 drm_buf_desc32_t v = {.count = from->buf_count, 381 .size = from->buf_size, 382 .low_mark = from->low_mark, 383 .high_mark = from->high_mark}; 384 385 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags))) 386 return -EFAULT; 387 return 0; 388 } 389 390 static int drm_legacy_infobufs32(struct drm_device *dev, void *data, 391 struct drm_file *file_priv) 392 { 393 drm_buf_info32_t *request = data; 394 395 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32); 396 } 397 398 static int compat_drm_infobufs(struct file *file, unsigned int cmd, 399 unsigned long arg) 400 { 401 drm_buf_info32_t req32; 402 drm_buf_info32_t __user *argp = (void __user *)arg; 403 int err; 404 405 if (copy_from_user(&req32, argp, sizeof(req32))) 406 return -EFAULT; 407 408 if (req32.count < 0) 409 req32.count = 0; 410 411 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH); 412 if (err) 413 return err; 414 415 if (put_user(req32.count, &argp->count)) 416 return -EFAULT; 417 418 return 0; 419 } 420 421 typedef struct drm_buf_pub32 { 422 int idx; /**< Index into the master buffer list */ 423 int total; /**< Buffer size */ 424 int used; /**< Amount of buffer in use (for DMA) */ 425 u32 address; /**< Address of buffer */ 426 } drm_buf_pub32_t; 427 428 typedef struct drm_buf_map32 { 429 int count; /**< Length of the buffer list */ 430 u32 virtual; /**< Mmap'd area in user-virtual */ 431 u32 list; /**< Buffer information */ 432 } drm_buf_map32_t; 433 434 static int map_one_buf32(void *data, int idx, unsigned long virtual, 435 struct drm_buf *buf) 436 { 437 drm_buf_map32_t *request = data; 438 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx; 439 drm_buf_pub32_t v; 440 441 v.idx = buf->idx; 442 v.total = buf->total; 443 v.used = 0; 444 v.address = virtual + buf->offset; 445 if (copy_to_user(to, &v, sizeof(v))) 446 return -EFAULT; 447 return 0; 448 } 449 450 static int drm_legacy_mapbufs32(struct drm_device *dev, void *data, 451 struct drm_file *file_priv) 452 { 453 drm_buf_map32_t *request = data; 454 void __user *v; 455 int err = __drm_legacy_mapbufs(dev, data, &request->count, 456 &v, map_one_buf32, 457 file_priv); 458 request->virtual = ptr_to_compat(v); 459 return err; 460 } 461 462 static int compat_drm_mapbufs(struct file *file, unsigned int cmd, 463 unsigned long arg) 464 { 465 drm_buf_map32_t __user *argp = (void __user *)arg; 466 drm_buf_map32_t req32; 467 int err; 468 469 if (copy_from_user(&req32, argp, sizeof(req32))) 470 return -EFAULT; 471 if (req32.count < 0) 472 return -EINVAL; 473 474 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH); 475 if (err) 476 return err; 477 478 if (put_user(req32.count, &argp->count) 479 || put_user(req32.virtual, &argp->virtual)) 480 return -EFAULT; 481 482 return 0; 483 } 484 485 typedef struct drm_buf_free32 { 486 int count; 487 u32 list; 488 } drm_buf_free32_t; 489 490 static int compat_drm_freebufs(struct file *file, unsigned int cmd, 491 unsigned long arg) 492 { 493 drm_buf_free32_t req32; 494 struct drm_buf_free request; 495 drm_buf_free32_t __user *argp = (void __user *)arg; 496 497 if (copy_from_user(&req32, argp, sizeof(req32))) 498 return -EFAULT; 499 500 request.count = req32.count; 501 request.list = compat_ptr(req32.list); 502 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH); 503 } 504 505 typedef struct drm_ctx_priv_map32 { 506 unsigned int ctx_id; /**< Context requesting private mapping */ 507 u32 handle; /**< Handle of map */ 508 } drm_ctx_priv_map32_t; 509 510 static int compat_drm_setsareactx(struct file *file, unsigned int cmd, 511 unsigned long arg) 512 { 513 drm_ctx_priv_map32_t req32; 514 struct drm_ctx_priv_map request; 515 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 516 517 if (copy_from_user(&req32, argp, sizeof(req32))) 518 return -EFAULT; 519 520 request.ctx_id = req32.ctx_id; 521 request.handle = compat_ptr(req32.handle); 522 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request, 523 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 524 } 525 526 static int compat_drm_getsareactx(struct file *file, unsigned int cmd, 527 unsigned long arg) 528 { 529 struct drm_ctx_priv_map req; 530 drm_ctx_priv_map32_t req32; 531 drm_ctx_priv_map32_t __user *argp = (void __user *)arg; 532 int err; 533 534 if (copy_from_user(&req32, argp, sizeof(req32))) 535 return -EFAULT; 536 537 req.ctx_id = req32.ctx_id; 538 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH); 539 if (err) 540 return err; 541 542 req32.handle = ptr_to_compat((void __user *)req.handle); 543 if (copy_to_user(argp, &req32, sizeof(req32))) 544 return -EFAULT; 545 546 return 0; 547 } 548 549 typedef struct drm_ctx_res32 { 550 int count; 551 u32 contexts; 552 } drm_ctx_res32_t; 553 554 static int compat_drm_resctx(struct file *file, unsigned int cmd, 555 unsigned long arg) 556 { 557 drm_ctx_res32_t __user *argp = (void __user *)arg; 558 drm_ctx_res32_t res32; 559 struct drm_ctx_res res; 560 int err; 561 562 if (copy_from_user(&res32, argp, sizeof(res32))) 563 return -EFAULT; 564 565 res.count = res32.count; 566 res.contexts = compat_ptr(res32.contexts); 567 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH); 568 if (err) 569 return err; 570 571 res32.count = res.count; 572 if (copy_to_user(argp, &res32, sizeof(res32))) 573 return -EFAULT; 574 575 return 0; 576 } 577 578 typedef struct drm_dma32 { 579 int context; /**< Context handle */ 580 int send_count; /**< Number of buffers to send */ 581 u32 send_indices; /**< List of handles to buffers */ 582 u32 send_sizes; /**< Lengths of data to send */ 583 enum drm_dma_flags flags; /**< Flags */ 584 int request_count; /**< Number of buffers requested */ 585 int request_size; /**< Desired size for buffers */ 586 u32 request_indices; /**< Buffer information */ 587 u32 request_sizes; 588 int granted_count; /**< Number of buffers granted */ 589 } drm_dma32_t; 590 591 static int compat_drm_dma(struct file *file, unsigned int cmd, 592 unsigned long arg) 593 { 594 drm_dma32_t d32; 595 drm_dma32_t __user *argp = (void __user *)arg; 596 struct drm_dma d; 597 int err; 598 599 if (copy_from_user(&d32, argp, sizeof(d32))) 600 return -EFAULT; 601 602 d.context = d32.context; 603 d.send_count = d32.send_count; 604 d.send_indices = compat_ptr(d32.send_indices); 605 d.send_sizes = compat_ptr(d32.send_sizes); 606 d.flags = d32.flags; 607 d.request_count = d32.request_count; 608 d.request_indices = compat_ptr(d32.request_indices); 609 d.request_sizes = compat_ptr(d32.request_sizes); 610 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH); 611 if (err) 612 return err; 613 614 if (put_user(d.request_size, &argp->request_size) 615 || put_user(d.granted_count, &argp->granted_count)) 616 return -EFAULT; 617 618 return 0; 619 } 620 #endif 621 622 #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_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_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_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_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_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_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_agp_unbind_ioctl, &request, 761 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 762 } 763 #endif /* CONFIG_AGP */ 764 765 #if IS_ENABLED(CONFIG_DRM_LEGACY) 766 typedef struct drm_scatter_gather32 { 767 u32 size; /**< In bytes -- will round to page boundary */ 768 u32 handle; /**< Used for mapping / unmapping */ 769 } drm_scatter_gather32_t; 770 771 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd, 772 unsigned long arg) 773 { 774 drm_scatter_gather32_t __user *argp = (void __user *)arg; 775 struct drm_scatter_gather request; 776 int err; 777 778 if (get_user(request.size, &argp->size)) 779 return -EFAULT; 780 781 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request, 782 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 783 if (err) 784 return err; 785 786 /* XXX not sure about the handle conversion here... */ 787 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle)) 788 return -EFAULT; 789 790 return 0; 791 } 792 793 static int compat_drm_sg_free(struct file *file, unsigned int cmd, 794 unsigned long arg) 795 { 796 drm_scatter_gather32_t __user *argp = (void __user *)arg; 797 struct drm_scatter_gather request; 798 unsigned long x; 799 800 if (get_user(x, &argp->handle)) 801 return -EFAULT; 802 request.handle = x << PAGE_SHIFT; 803 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request, 804 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY); 805 } 806 #endif 807 #if defined(CONFIG_X86) 808 typedef struct drm_update_draw32 { 809 drm_drawable_t handle; 810 unsigned int type; 811 unsigned int num; 812 /* 64-bit version has a 32-bit pad here */ 813 u64 data; /**< Pointer */ 814 } __attribute__((packed)) drm_update_draw32_t; 815 816 static int compat_drm_update_draw(struct file *file, unsigned int cmd, 817 unsigned long arg) 818 { 819 /* update_draw is defunct */ 820 return 0; 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 memset(&req, 0, sizeof(req)); 854 855 req.request.type = req32.request.type; 856 req.request.sequence = req32.request.sequence; 857 req.request.signal = req32.request.signal; 858 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED); 859 if (err) 860 return err; 861 862 req32.reply.type = req.reply.type; 863 req32.reply.sequence = req.reply.sequence; 864 req32.reply.tval_sec = req.reply.tval_sec; 865 req32.reply.tval_usec = req.reply.tval_usec; 866 if (copy_to_user(argp, &req32, sizeof(req32))) 867 return -EFAULT; 868 869 return 0; 870 } 871 872 #if defined(CONFIG_X86) 873 typedef struct drm_mode_fb_cmd232 { 874 u32 fb_id; 875 u32 width; 876 u32 height; 877 u32 pixel_format; 878 u32 flags; 879 u32 handles[4]; 880 u32 pitches[4]; 881 u32 offsets[4]; 882 u64 modifier[4]; 883 } __attribute__((packed)) drm_mode_fb_cmd232_t; 884 885 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd, 886 unsigned long arg) 887 { 888 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg; 889 struct drm_mode_fb_cmd2 req64; 890 int err; 891 892 memset(&req64, 0, sizeof(req64)); 893 894 if (copy_from_user(&req64, argp, 895 offsetof(drm_mode_fb_cmd232_t, modifier))) 896 return -EFAULT; 897 898 if (copy_from_user(&req64.modifier, &argp->modifier, 899 sizeof(req64.modifier))) 900 return -EFAULT; 901 902 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0); 903 if (err) 904 return err; 905 906 if (put_user(req64.fb_id, &argp->fb_id)) 907 return -EFAULT; 908 909 return 0; 910 } 911 #endif 912 913 static struct { 914 drm_ioctl_compat_t *fn; 915 char *name; 916 } drm_compat_ioctls[] = { 917 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n} 918 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version), 919 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique), 920 #if IS_ENABLED(CONFIG_DRM_LEGACY) 921 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap), 922 #endif 923 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient), 924 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats), 925 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique), 926 #if IS_ENABLED(CONFIG_DRM_LEGACY) 927 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap), 928 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs), 929 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs), 930 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs), 931 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs), 932 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs), 933 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap), 934 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx), 935 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx), 936 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx), 937 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma), 938 #endif 939 #if IS_ENABLED(CONFIG_AGP) 940 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable), 941 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info), 942 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc), 943 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free), 944 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind), 945 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind), 946 #endif 947 #if IS_ENABLED(CONFIG_DRM_LEGACY) 948 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc), 949 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free), 950 #endif 951 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 952 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw), 953 #endif 954 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank), 955 #if defined(CONFIG_X86) || defined(CONFIG_IA64) 956 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2), 957 #endif 958 }; 959 960 /** 961 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers 962 * @filp: file this ioctl is called on 963 * @cmd: ioctl cmd number 964 * @arg: user argument 965 * 966 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual 967 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as 968 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has 969 * botched IOCTL itself, it must handle those by wrapping this function. 970 * 971 * Returns: 972 * Zero on success, negative error code on failure. 973 */ 974 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 975 { 976 unsigned int nr = DRM_IOCTL_NR(cmd); 977 struct drm_file *file_priv = filp->private_data; 978 drm_ioctl_compat_t *fn; 979 int ret; 980 981 /* Assume that ioctls without an explicit compat routine will just 982 * work. This may not always be a good assumption, but it's better 983 * than always failing. 984 */ 985 if (nr >= ARRAY_SIZE(drm_compat_ioctls)) 986 return drm_ioctl(filp, cmd, arg); 987 988 fn = drm_compat_ioctls[nr].fn; 989 if (!fn) 990 return drm_ioctl(filp, cmd, arg); 991 992 DRM_DEBUG("comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n", 993 current->comm, task_pid_nr(current), 994 (long)old_encode_dev(file_priv->minor->kdev->devt), 995 file_priv->authenticated, 996 drm_compat_ioctls[nr].name); 997 ret = (*fn)(filp, cmd, arg); 998 if (ret) 999 DRM_DEBUG("ret = %d\n", ret); 1000 return ret; 1001 } 1002 EXPORT_SYMBOL(drm_compat_ioctl); 1003