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