1 /* 2 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com 3 * 4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 6 * All Rights Reserved. 7 * 8 * Author Rickard E. (Rik) Faith <faith@valinux.com> 9 * Author Gareth Hughes <gareth@valinux.com> 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 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 28 * OTHER DEALINGS IN THE SOFTWARE. 29 */ 30 31 #include <drm/drmP.h> 32 #include <drm/drm_core.h> 33 #include "drm_legacy.h" 34 #include "drm_internal.h" 35 #include "drm_crtc_internal.h" 36 37 #include <linux/pci.h> 38 #include <linux/export.h> 39 40 static int drm_version(struct drm_device *dev, void *data, 41 struct drm_file *file_priv); 42 43 /* 44 * Get the bus id. 45 * 46 * \param inode device inode. 47 * \param file_priv DRM file private. 48 * \param cmd command. 49 * \param arg user argument, pointing to a drm_unique structure. 50 * \return zero on success or a negative number on failure. 51 * 52 * Copies the bus id from drm_device::unique into user space. 53 */ 54 static int drm_getunique(struct drm_device *dev, void *data, 55 struct drm_file *file_priv) 56 { 57 struct drm_unique *u = data; 58 59 if (u->unique_len >= dev->unique_len) { 60 if (copy_to_user(u->unique, dev->unique, dev->unique_len)) 61 return -EFAULT; 62 } 63 u->unique_len = dev->unique_len; 64 65 return 0; 66 } 67 68 /* 69 * Set the bus id. 70 * 71 * \param inode device inode. 72 * \param file_priv DRM file private. 73 * \param cmd command. 74 * \param arg user argument, pointing to a drm_unique structure. 75 * \return zero on success or a negative number on failure. 76 * 77 * Copies the bus id from userspace into drm_device::unique, and verifies that 78 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated 79 * in interface version 1.1 and will return EBUSY when setversion has requested 80 * version 1.1 or greater. 81 */ 82 static int drm_setunique(struct drm_device *dev, void *data, 83 struct drm_file *file_priv) 84 { 85 struct drm_unique *u = data; 86 int domain, bus, slot, func, ret; 87 char *busid; 88 89 /* Check and copy in the submitted Bus ID */ 90 if (!u->unique_len || u->unique_len > 1024) 91 return -EINVAL; 92 93 busid = kmalloc(u->unique_len + 1, M_DRM, M_WAITOK); 94 if (busid == NULL) 95 return -ENOMEM; 96 97 if (copy_from_user(busid, u->unique, u->unique_len)) { 98 kfree(busid); 99 return -EFAULT; 100 } 101 busid[u->unique_len] = '\0'; 102 103 /* Return error if the busid submitted doesn't match the device's actual 104 * busid. 105 */ 106 ret = ksscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func); 107 if (ret != 3) { 108 kfree(busid); 109 return -EINVAL; 110 } 111 domain = bus >> 8; 112 bus &= 0xff; 113 114 if ((domain != dev->pci_domain) || 115 (bus != dev->pci_bus) || 116 (slot != dev->pci_slot) || 117 (func != dev->pci_func)) { 118 kfree(busid); 119 return -EINVAL; 120 } 121 122 /* Actually set the device's busid now. */ 123 DRM_LOCK(dev); 124 if (dev->unique_len || dev->unique) { 125 DRM_UNLOCK(dev); 126 return -EBUSY; 127 } 128 129 dev->unique_len = u->unique_len; 130 dev->unique = busid; 131 DRM_UNLOCK(dev); 132 133 return 0; 134 } 135 136 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) 137 { 138 139 DRM_LOCK(dev); 140 141 dev->unique_len = 20; 142 dev->unique = kmalloc(dev->unique_len + 1, M_DRM, M_WAITOK | M_NULLOK); 143 if (dev->unique == NULL) { 144 DRM_UNLOCK(dev); 145 return -ENOMEM; 146 } 147 148 ksnprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x", 149 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); 150 151 DRM_UNLOCK(dev); 152 153 return 0; 154 } 155 156 /* 157 * Get client information. 158 * 159 * \param inode device inode. 160 * \param file_priv DRM file private. 161 * \param cmd command. 162 * \param arg user argument, pointing to a drm_client structure. 163 * 164 * \return zero on success or a negative number on failure. 165 * 166 * Searches for the client with the specified index and copies its information 167 * into userspace 168 */ 169 static int drm_getclient(struct drm_device *dev, void *data, 170 struct drm_file *file_priv) 171 { 172 struct drm_client *client = data; 173 struct drm_file *pt; 174 int idx; 175 int i = 0; 176 177 idx = client->idx; 178 DRM_LOCK(dev); 179 list_for_each_entry(pt, &dev->filelist, lhead) { 180 if (i++ >= idx) { 181 client->auth = pt->authenticated; 182 client->pid = pt->pid; 183 client->uid = pt->uid; 184 client->magic = pt->magic; 185 client->iocs = pt->ioctl_count; 186 DRM_UNLOCK(dev); 187 188 return 0; 189 } 190 } 191 DRM_UNLOCK(dev); 192 193 return -EINVAL; 194 } 195 196 /* 197 * Get statistics information. 198 * 199 * \param inode device inode. 200 * \param file_priv DRM file private. 201 * \param cmd command. 202 * \param arg user argument, pointing to a drm_stats structure. 203 * 204 * \return zero on success or a negative number on failure. 205 */ 206 static int drm_getstats(struct drm_device *dev, void *data, 207 struct drm_file *file_priv) 208 { 209 struct drm_stats *stats = data; 210 int i; 211 212 memset(stats, 0, sizeof(struct drm_stats)); 213 214 DRM_LOCK(dev); 215 216 for (i = 0; i < dev->counters; i++) { 217 if (dev->types[i] == _DRM_STAT_LOCK) 218 stats->data[i].value = 219 (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0); 220 else 221 stats->data[i].value = atomic_read(&dev->counts[i]); 222 stats->data[i].type = dev->types[i]; 223 } 224 225 stats->count = dev->counters; 226 227 DRM_UNLOCK(dev); 228 229 return 0; 230 } 231 232 /* 233 * Get device/driver capabilities 234 */ 235 static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 236 { 237 struct drm_get_cap *req = data; 238 239 req->value = 0; 240 switch (req->capability) { 241 case DRM_CAP_DUMB_BUFFER: 242 if (dev->driver->dumb_create) 243 req->value = 1; 244 break; 245 case DRM_CAP_VBLANK_HIGH_CRTC: 246 req->value = 1; 247 break; 248 case DRM_CAP_DUMB_PREFERRED_DEPTH: 249 req->value = dev->mode_config.preferred_depth; 250 break; 251 case DRM_CAP_DUMB_PREFER_SHADOW: 252 req->value = dev->mode_config.prefer_shadow; 253 break; 254 case DRM_CAP_TIMESTAMP_MONOTONIC: 255 req->value = drm_timestamp_monotonic; 256 break; 257 case DRM_CAP_ASYNC_PAGE_FLIP: 258 req->value = dev->mode_config.async_page_flip; 259 break; 260 case DRM_CAP_CURSOR_WIDTH: 261 if (dev->mode_config.cursor_width) 262 req->value = dev->mode_config.cursor_width; 263 else 264 req->value = 64; 265 break; 266 case DRM_CAP_CURSOR_HEIGHT: 267 if (dev->mode_config.cursor_height) 268 req->value = dev->mode_config.cursor_height; 269 else 270 req->value = 64; 271 break; 272 default: 273 return -EINVAL; 274 } 275 return 0; 276 } 277 278 /* 279 * Set device/driver capabilities 280 */ 281 static int 282 drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) 283 { 284 struct drm_set_client_cap *req = data; 285 286 switch (req->capability) { 287 case DRM_CLIENT_CAP_STEREO_3D: 288 if (req->value > 1) 289 return -EINVAL; 290 file_priv->stereo_allowed = req->value; 291 break; 292 case DRM_CLIENT_CAP_UNIVERSAL_PLANES: 293 if (req->value > 1) 294 return -EINVAL; 295 file_priv->universal_planes = req->value; 296 break; 297 case DRM_CLIENT_CAP_ATOMIC: 298 if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) 299 return -EINVAL; 300 if (req->value > 1) 301 return -EINVAL; 302 file_priv->atomic = req->value; 303 file_priv->universal_planes = req->value; 304 break; 305 default: 306 return -EINVAL; 307 } 308 309 return 0; 310 } 311 312 /* 313 * Setversion ioctl. 314 * 315 * \param inode device inode. 316 * \param file_priv DRM file private. 317 * \param cmd command. 318 * \param arg user argument, pointing to a drm_lock structure. 319 * \return zero on success or negative number on failure. 320 * 321 * Sets the requested interface version 322 */ 323 static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) 324 { 325 struct drm_set_version *sv = data; 326 struct drm_set_version ver; 327 int if_version, retcode = 0; 328 329 /* Save the incoming data, and set the response before continuing 330 * any further. 331 */ 332 ver = *sv; 333 sv->drm_di_major = DRM_IF_MAJOR; 334 sv->drm_di_minor = DRM_IF_MINOR; 335 sv->drm_dd_major = dev->driver->major; 336 sv->drm_dd_minor = dev->driver->minor; 337 338 if (ver.drm_di_major != -1) { 339 if (ver.drm_di_major != DRM_IF_MAJOR || 340 ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) { 341 return -EINVAL; 342 } 343 if_version = DRM_IF_VERSION(ver.drm_di_major, 344 ver.drm_dd_minor); 345 dev->if_version = DRM_MAX(if_version, dev->if_version); 346 if (ver.drm_di_minor >= 1) { 347 /* 348 * Version 1.1 includes tying of DRM to specific device 349 * Version 1.4 has proper PCI domain support 350 */ 351 retcode = drm_set_busid(dev, file_priv); 352 if (retcode) 353 return retcode; 354 } 355 } 356 357 if (ver.drm_dd_major != -1) { 358 if (ver.drm_dd_major != dev->driver->major || 359 ver.drm_dd_minor < 0 || 360 ver.drm_dd_minor > dev->driver->minor) 361 { 362 return -EINVAL; 363 } 364 } 365 366 return 0; 367 } 368 369 /** 370 * drm_noop - DRM no-op ioctl implemntation 371 * @dev: DRM device for the ioctl 372 * @data: data pointer for the ioctl 373 * @file_priv: DRM file for the ioctl call 374 * 375 * This no-op implementation for drm ioctls is useful for deprecated 376 * functionality where we can't return a failure code because existing userspace 377 * checks the result of the ioctl, but doesn't care about the action. 378 * 379 * Always returns successfully with 0. 380 */ 381 int drm_noop(struct drm_device *dev, void *data, 382 struct drm_file *file_priv) 383 { 384 DRM_DEBUG("\n"); 385 return 0; 386 } 387 EXPORT_SYMBOL(drm_noop); 388 389 /** 390 * drm_invalid_op - DRM invalid ioctl implemntation 391 * @dev: DRM device for the ioctl 392 * @data: data pointer for the ioctl 393 * @file_priv: DRM file for the ioctl call 394 * 395 * This no-op implementation for drm ioctls is useful for deprecated 396 * functionality where we really don't want to allow userspace to call the ioctl 397 * any more. This is the case for old ums interfaces for drivers that 398 * transitioned to kms gradually and so kept the old legacy tables around. This 399 * only applies to radeon and i915 kms drivers, other drivers shouldn't need to 400 * use this function. 401 * 402 * Always fails with a return value of -EINVAL. 403 */ 404 int drm_invalid_op(struct drm_device *dev, void *data, 405 struct drm_file *file_priv) 406 { 407 return -EINVAL; 408 } 409 EXPORT_SYMBOL(drm_invalid_op); 410 411 /* 412 * Copy and IOCTL return string to user space 413 */ 414 static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) 415 { 416 int len; 417 418 /* don't overflow userbuf */ 419 len = strlen(value); 420 if (len > *buf_len) 421 len = *buf_len; 422 423 /* let userspace know exact length of driver value (which could be 424 * larger than the userspace-supplied buffer) */ 425 *buf_len = strlen(value); 426 427 /* finally, try filling in the userbuf */ 428 if (len && buf) 429 if (copy_to_user(buf, value, len)) 430 return -EFAULT; 431 return 0; 432 } 433 434 /* 435 * Get version information 436 * 437 * \param inode device inode. 438 * \param filp file pointer. 439 * \param cmd command. 440 * \param arg user argument, pointing to a drm_version structure. 441 * \return zero on success or negative number on failure. 442 * 443 * Fills in the version information in \p arg. 444 */ 445 static int drm_version(struct drm_device *dev, void *data, 446 struct drm_file *file_priv) 447 { 448 struct drm_version *version = data; 449 int err; 450 451 version->version_major = dev->driver->major; 452 version->version_minor = dev->driver->minor; 453 version->version_patchlevel = dev->driver->patchlevel; 454 err = drm_copy_field(version->name, &version->name_len, 455 dev->driver->name); 456 if (!err) 457 err = drm_copy_field(version->date, &version->date_len, 458 dev->driver->date); 459 if (!err) 460 err = drm_copy_field(version->desc, &version->desc_len, 461 dev->driver->desc); 462 463 return err; 464 } 465 466 /* 467 * drm_ioctl_permit - Check ioctl permissions against caller 468 * 469 * @flags: ioctl permission flags. 470 * @file_priv: Pointer to struct drm_file identifying the caller. 471 * 472 * Checks whether the caller is allowed to run an ioctl with the 473 * indicated permissions. If so, returns zero. Otherwise returns an 474 * error code suitable for ioctl return. 475 */ 476 #if 0 477 int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) 478 { 479 /* ROOT_ONLY is only for CAP_SYS_ADMIN */ 480 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) 481 return -EACCES; 482 483 /* AUTH is only for authenticated or render client */ 484 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && 485 !file_priv->authenticated)) 486 return -EACCES; 487 488 /* MASTER is only for master or control clients */ 489 if (unlikely((flags & DRM_MASTER) && !file_priv->is_master && 490 !drm_is_control_client(file_priv))) 491 return -EACCES; 492 493 /* Control clients must be explicitly allowed */ 494 if (unlikely(!(flags & DRM_CONTROL_ALLOW) && 495 drm_is_control_client(file_priv))) 496 return -EACCES; 497 498 /* Render clients must be explicitly allowed */ 499 if (unlikely(!(flags & DRM_RENDER_ALLOW) && 500 drm_is_render_client(file_priv))) 501 return -EACCES; 502 503 return 0; 504 } 505 EXPORT_SYMBOL(drm_ioctl_permit); 506 #endif 507 508 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ 509 [DRM_IOCTL_NR(ioctl)] = { \ 510 .cmd = ioctl, \ 511 .func = _func, \ 512 .flags = _flags, \ 513 .cmd_drv = 0, \ 514 .name = #ioctl \ 515 } 516 517 /* Ioctl table */ 518 static const struct drm_ioctl_desc drm_ioctls[] = { 519 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 520 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW), 521 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), 522 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), 523 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), 524 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_legacy_getmap_ioctl, DRM_UNLOCKED), 525 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), 526 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), 527 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), 528 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0), 529 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), 530 531 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 532 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 533 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 534 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), 535 536 #ifdef __DragonFly__ 537 DRM_IOCTL_DEF(DRM_IOCTL_GET_PCIINFO, drm_getpciinfo, DRM_UNLOCKED|DRM_RENDER_ALLOW), 538 #else 539 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 540 #endif 541 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), 542 543 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 544 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH), 545 546 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), 547 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), 548 549 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY), 550 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 551 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 552 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH), 553 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 554 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 555 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH), 556 557 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 558 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 559 560 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH), 561 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH), 562 563 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), 564 565 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 566 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 567 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH), 568 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH), 569 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH), 570 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH), 571 572 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 573 574 #if IS_ENABLED(CONFIG_AGP) 575 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 576 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 577 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 578 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), 579 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 580 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 581 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 582 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 583 #endif 584 585 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 586 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 587 588 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), 589 590 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), 591 592 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 593 594 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), 595 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), 596 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), 597 598 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 599 600 #if 0 601 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), 602 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), 603 #endif 604 605 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 606 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 607 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 608 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 609 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 610 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 611 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), 612 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), 613 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 614 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 615 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 616 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 617 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 618 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 619 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 620 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 621 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 622 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 623 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 624 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 625 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 626 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 627 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 628 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 629 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 630 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 631 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 632 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), 633 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 634 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), 635 }; 636 637 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) 638 639 /** 640 * drm_ioctl - ioctl callback implementation for DRM drivers 641 * @filp: file this ioctl is called on 642 * @cmd: ioctl cmd number 643 * @arg: user argument 644 * 645 * Looks up the ioctl function in the ::ioctls table, checking for root 646 * previleges if so required, and dispatches to the respective function. 647 * 648 * Returns: 649 * Zero on success, negative error code on failure. 650 */ 651 int drm_ioctl(struct dev_ioctl_args *ap) 652 { 653 struct file *filp = ap->a_fp; 654 struct drm_file *file_priv = filp->private_data; 655 struct cdev *kdev = ap->a_head.a_dev; 656 struct drm_device *dev; 657 const struct drm_ioctl_desc *ioctl = NULL; 658 u_long cmd = ap->a_cmd; 659 unsigned int nr = DRM_IOCTL_NR(cmd); 660 int retcode = 0; 661 caddr_t data = ap->a_data; 662 int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv); 663 bool is_driver_ioctl; 664 665 dev = drm_get_device_from_kdev(kdev); 666 667 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); 668 669 if (drm_device_is_unplugged(dev)) 670 return ENODEV; 671 672 is_driver_ioctl = nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END; 673 674 if (IOCGROUP(cmd) != DRM_IOCTL_BASE) { 675 DRM_DEBUG_FIOCTL("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd)); 676 return EINVAL; 677 } 678 679 ioctl = &drm_ioctls[nr]; 680 /* It's not a core DRM ioctl, try driver-specific. */ 681 if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) { 682 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */ 683 nr -= DRM_COMMAND_BASE; 684 if (nr >= dev->driver->num_ioctls) { 685 return EINVAL; 686 } 687 ioctl = &dev->driver->ioctls[nr]; 688 is_driver_ioctl = 1; 689 } 690 691 DRM_DEBUG_IOCTL("pid=%d, dev=0x%lx, auth=%d, %s\n", 692 DRM_CURRENTPID, (long)dev->dev, 693 file_priv->authenticated, ioctl->name); 694 695 /* Do not trust userspace, use our own definition */ 696 func = ioctl->func; 697 698 if (unlikely(!func)) { 699 DRM_DEBUG("no function\n"); 700 retcode = -EINVAL; 701 goto err_i1; 702 } 703 704 if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || 705 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) || 706 ((ioctl->flags & DRM_MASTER) && !file_priv->master)) 707 return EACCES; 708 709 /* Enforce sane locking for kms driver ioctls. Core ioctls are 710 * too messy still. */ 711 if (is_driver_ioctl) { 712 if ((ioctl->flags & DRM_UNLOCKED) == 0) 713 mutex_lock(&drm_global_mutex); 714 /* shared code returns -errno */ 715 retcode = -func(dev, data, file_priv); 716 if (retcode == ERESTARTSYS) 717 retcode = EINTR; 718 if ((ioctl->flags & DRM_UNLOCKED) == 0) 719 mutex_unlock(&drm_global_mutex); 720 } else { 721 retcode = -func(dev, data, file_priv); 722 if (retcode == ERESTARTSYS) 723 retcode = EINTR; 724 } 725 726 err_i1: 727 if (!ioctl) 728 DRM_DEBUG_FIOCTL("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02lx, nr=0x%02x\n", 729 DRM_CURRENTPID, 730 (long)dev->dev, 731 file_priv->authenticated, cmd, nr); 732 733 if (retcode) 734 DRM_DEBUG_FIOCTL("ret = %d\n", retcode); 735 return retcode; 736 } 737 EXPORT_SYMBOL(drm_ioctl); 738 739 /** 740 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags 741 * @nr: ioctl number 742 * @flags: where to return the ioctl permission flags 743 * 744 * This ioctl is only used by the vmwgfx driver to augment the access checks 745 * done by the drm core and insofar a pretty decent layering violation. This 746 * shouldn't be used by any drivers. 747 * 748 * Returns: 749 * True if the @nr corresponds to a DRM core ioctl numer, false otherwise. 750 */ 751 bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) 752 { 753 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) || 754 (nr < DRM_COMMAND_BASE)) { 755 *flags = drm_ioctls[nr].flags; 756 return true; 757 } 758 759 return false; 760 } 761 EXPORT_SYMBOL(drm_ioctl_flags); 762