1 /** 2 * \file drm_drv.c 3 * Generic driver template 4 * 5 * \author Rickard E. (Rik) Faith <faith@valinux.com> 6 * \author Gareth Hughes <gareth@valinux.com> 7 * 8 * To use this template, you must at least define the following (samples 9 * given for the MGA driver): 10 * 11 * \code 12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc." 13 * 14 * #define DRIVER_NAME "mga" 15 * #define DRIVER_DESC "Matrox G200/G400" 16 * #define DRIVER_DATE "20001127" 17 * 18 * #define drm_x mga_##x 19 * \endcode 20 */ 21 22 /* 23 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com 24 * 25 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. 26 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 27 * All Rights Reserved. 28 * 29 * Permission is hereby granted, free of charge, to any person obtaining a 30 * copy of this software and associated documentation files (the "Software"), 31 * to deal in the Software without restriction, including without limitation 32 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 33 * and/or sell copies of the Software, and to permit persons to whom the 34 * Software is furnished to do so, subject to the following conditions: 35 * 36 * The above copyright notice and this permission notice (including the next 37 * paragraph) shall be included in all copies or substantial portions of the 38 * Software. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 41 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 42 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 43 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 44 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 45 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 46 * OTHER DEALINGS IN THE SOFTWARE. 47 */ 48 49 #include "drmP.h" 50 #include "drm_core.h" 51 52 static int drm_version(struct drm_device *dev, void *data, 53 struct drm_file *file_priv); 54 55 /** Ioctl table */ 56 static struct drm_ioctl_desc drm_ioctls[] = { 57 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0), 58 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), 59 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), 60 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), 61 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0), 62 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0), 63 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0), 64 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY), 65 66 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 67 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 68 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 69 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 70 71 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 72 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), 73 74 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 75 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH), 76 77 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), 78 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), 79 80 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY), 81 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 82 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 83 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH), 84 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 85 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 86 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH), 87 88 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 89 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 90 91 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), 92 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), 93 94 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), 95 96 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 97 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 98 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), 99 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), 100 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), 101 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ 102 DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH), 103 104 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 105 106 #if __OS_HAS_AGP 107 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 108 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 109 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 110 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), 111 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 112 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 113 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 114 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 115 #endif 116 117 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 118 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 119 120 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0), 121 122 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), 123 124 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 125 126 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, 0), 127 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH), 128 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH), 129 130 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW), 131 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW), 132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW), 133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER), 135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER), 136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW), 137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW), 138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW), 141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW), 144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW), 145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW), 146 }; 147 148 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) 149 150 /** 151 * Take down the DRM device. 152 * 153 * \param dev DRM device structure. 154 * 155 * Frees every resource in \p dev. 156 * 157 * \sa drm_device 158 */ 159 int drm_lastclose(struct drm_device * dev) 160 { 161 struct drm_vma_entry *vma, *vma_temp; 162 int i; 163 164 DRM_DEBUG("\n"); 165 166 if (dev->driver->lastclose) 167 dev->driver->lastclose(dev); 168 DRM_DEBUG("driver lastclose completed\n"); 169 170 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) 171 drm_irq_uninstall(dev); 172 173 mutex_lock(&dev->struct_mutex); 174 175 /* Free drawable information memory */ 176 drm_drawable_free_all(dev); 177 del_timer(&dev->timer); 178 179 /* Clear AGP information */ 180 if (drm_core_has_AGP(dev) && dev->agp && 181 !drm_core_check_feature(dev, DRIVER_MODESET)) { 182 struct drm_agp_mem *entry, *tempe; 183 184 /* Remove AGP resources, but leave dev->agp 185 intact until drv_cleanup is called. */ 186 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { 187 if (entry->bound) 188 drm_unbind_agp(entry->memory); 189 drm_free_agp(entry->memory, entry->pages); 190 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); 191 } 192 INIT_LIST_HEAD(&dev->agp->memory); 193 194 if (dev->agp->acquired) 195 drm_agp_release(dev); 196 197 dev->agp->acquired = 0; 198 dev->agp->enabled = 0; 199 } 200 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg && 201 !drm_core_check_feature(dev, DRIVER_MODESET)) { 202 drm_sg_cleanup(dev->sg); 203 dev->sg = NULL; 204 } 205 206 /* Clear vma list (only built for debugging) */ 207 list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { 208 list_del(&vma->head); 209 drm_free(vma, sizeof(*vma), DRM_MEM_VMAS); 210 } 211 212 if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) { 213 for (i = 0; i < dev->queue_count; i++) { 214 if (dev->queuelist[i]) { 215 drm_free(dev->queuelist[i], 216 sizeof(*dev->queuelist[0]), 217 DRM_MEM_QUEUES); 218 dev->queuelist[i] = NULL; 219 } 220 } 221 drm_free(dev->queuelist, 222 dev->queue_slots * sizeof(*dev->queuelist), 223 DRM_MEM_QUEUES); 224 dev->queuelist = NULL; 225 } 226 dev->queue_count = 0; 227 228 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && 229 !drm_core_check_feature(dev, DRIVER_MODESET)) 230 drm_dma_takedown(dev); 231 232 dev->dev_mapping = NULL; 233 mutex_unlock(&dev->struct_mutex); 234 235 DRM_DEBUG("lastclose completed\n"); 236 return 0; 237 } 238 239 /** 240 * Module initialization. Called via init_module at module load time, or via 241 * linux/init/main.c (this is not currently supported). 242 * 243 * \return zero on success or a negative number on failure. 244 * 245 * Initializes an array of drm_device structures, and attempts to 246 * initialize all available devices, using consecutive minors, registering the 247 * stubs and initializing the AGP device. 248 * 249 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and 250 * after the initialization for driver customization. 251 */ 252 int drm_init(struct drm_driver *driver) 253 { 254 struct pci_dev *pdev = NULL; 255 struct pci_device_id *pid; 256 int i; 257 258 DRM_DEBUG("\n"); 259 260 INIT_LIST_HEAD(&driver->device_list); 261 262 for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) { 263 pid = (struct pci_device_id *)&driver->pci_driver.id_table[i]; 264 265 /* Loop around setting up a DRM device for each PCI device 266 * matching our ID and device class. If we had the internal 267 * function that pci_get_subsys and pci_get_class used, we'd 268 * be able to just pass pid in instead of doing a two-stage 269 * thing. 270 */ 271 pdev = NULL; 272 while ((pdev = 273 pci_get_subsys(pid->vendor, pid->device, pid->subvendor, 274 pid->subdevice, pdev)) != NULL) { 275 if ((pdev->class & pid->class_mask) != pid->class) 276 continue; 277 278 /* stealth mode requires a manual probe */ 279 pci_dev_get(pdev); 280 drm_get_dev(pdev, pid, driver); 281 } 282 } 283 return 0; 284 } 285 286 EXPORT_SYMBOL(drm_init); 287 288 /** 289 * Called via cleanup_module() at module unload time. 290 * 291 * Cleans up all DRM device, calling drm_lastclose(). 292 * 293 * \sa drm_init 294 */ 295 static void drm_cleanup(struct drm_device * dev) 296 { 297 DRM_DEBUG("\n"); 298 299 if (!dev) { 300 DRM_ERROR("cleanup called no dev\n"); 301 return; 302 } 303 304 drm_vblank_cleanup(dev); 305 306 drm_lastclose(dev); 307 308 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && 309 dev->agp && dev->agp->agp_mtrr >= 0) { 310 int retval; 311 retval = mtrr_del(dev->agp->agp_mtrr, 312 dev->agp->agp_info.aper_base, 313 dev->agp->agp_info.aper_size * 1024 * 1024); 314 DRM_DEBUG("mtrr_del=%d\n", retval); 315 } 316 317 if (drm_core_has_AGP(dev) && dev->agp) { 318 drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS); 319 dev->agp = NULL; 320 } 321 322 if (dev->driver->unload) 323 dev->driver->unload(dev); 324 325 drm_ht_remove(&dev->map_hash); 326 drm_ctxbitmap_cleanup(dev); 327 328 if (drm_core_check_feature(dev, DRIVER_MODESET)) 329 drm_put_minor(&dev->control); 330 331 if (dev->driver->driver_features & DRIVER_GEM) 332 drm_gem_destroy(dev); 333 334 drm_put_minor(&dev->primary); 335 if (drm_put_dev(dev)) 336 DRM_ERROR("Cannot unload module\n"); 337 } 338 339 void drm_exit(struct drm_driver *driver) 340 { 341 struct drm_device *dev, *tmp; 342 DRM_DEBUG("\n"); 343 344 list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) 345 drm_cleanup(dev); 346 347 DRM_INFO("Module unloaded\n"); 348 } 349 350 EXPORT_SYMBOL(drm_exit); 351 352 /** File operations structure */ 353 static const struct file_operations drm_stub_fops = { 354 .owner = THIS_MODULE, 355 .open = drm_stub_open 356 }; 357 358 static int __init drm_core_init(void) 359 { 360 int ret = -ENOMEM; 361 362 idr_init(&drm_minors_idr); 363 364 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) 365 goto err_p1; 366 367 drm_class = drm_sysfs_create(THIS_MODULE, "drm"); 368 if (IS_ERR(drm_class)) { 369 printk(KERN_ERR "DRM: Error creating drm class.\n"); 370 ret = PTR_ERR(drm_class); 371 goto err_p2; 372 } 373 374 drm_proc_root = proc_mkdir("dri", NULL); 375 if (!drm_proc_root) { 376 DRM_ERROR("Cannot create /proc/dri\n"); 377 ret = -1; 378 goto err_p3; 379 } 380 381 drm_mem_init(); 382 383 DRM_INFO("Initialized %s %d.%d.%d %s\n", 384 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 385 return 0; 386 err_p3: 387 drm_sysfs_destroy(); 388 err_p2: 389 unregister_chrdev(DRM_MAJOR, "drm"); 390 391 idr_destroy(&drm_minors_idr); 392 err_p1: 393 return ret; 394 } 395 396 static void __exit drm_core_exit(void) 397 { 398 remove_proc_entry("dri", NULL); 399 drm_sysfs_destroy(); 400 401 unregister_chrdev(DRM_MAJOR, "drm"); 402 403 idr_destroy(&drm_minors_idr); 404 } 405 406 module_init(drm_core_init); 407 module_exit(drm_core_exit); 408 409 /** 410 * Get version information 411 * 412 * \param inode device inode. 413 * \param filp file pointer. 414 * \param cmd command. 415 * \param arg user argument, pointing to a drm_version structure. 416 * \return zero on success or negative number on failure. 417 * 418 * Fills in the version information in \p arg. 419 */ 420 static int drm_version(struct drm_device *dev, void *data, 421 struct drm_file *file_priv) 422 { 423 struct drm_version *version = data; 424 int len; 425 426 version->version_major = dev->driver->major; 427 version->version_minor = dev->driver->minor; 428 version->version_patchlevel = dev->driver->patchlevel; 429 DRM_COPY(version->name, dev->driver->name); 430 DRM_COPY(version->date, dev->driver->date); 431 DRM_COPY(version->desc, dev->driver->desc); 432 433 return 0; 434 } 435 436 /** 437 * Called whenever a process performs an ioctl on /dev/drm. 438 * 439 * \param inode device inode. 440 * \param file_priv DRM file private. 441 * \param cmd command. 442 * \param arg user argument. 443 * \return zero on success or negative number on failure. 444 * 445 * Looks up the ioctl function in the ::ioctls table, checking for root 446 * previleges if so required, and dispatches to the respective function. 447 */ 448 int drm_ioctl(struct inode *inode, struct file *filp, 449 unsigned int cmd, unsigned long arg) 450 { 451 struct drm_file *file_priv = filp->private_data; 452 struct drm_device *dev = file_priv->minor->dev; 453 struct drm_ioctl_desc *ioctl; 454 drm_ioctl_t *func; 455 unsigned int nr = DRM_IOCTL_NR(cmd); 456 int retcode = -EINVAL; 457 char *kdata = NULL; 458 459 atomic_inc(&dev->ioctl_count); 460 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); 461 ++file_priv->ioctl_count; 462 463 DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", 464 task_pid_nr(current), cmd, nr, 465 (long)old_encode_dev(file_priv->minor->device), 466 file_priv->authenticated); 467 468 if ((nr >= DRM_CORE_IOCTL_COUNT) && 469 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) 470 goto err_i1; 471 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && 472 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) 473 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; 474 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { 475 ioctl = &drm_ioctls[nr]; 476 cmd = ioctl->cmd; 477 } else 478 goto err_i1; 479 480 /* Do not trust userspace, use our own definition */ 481 func = ioctl->func; 482 /* is there a local override? */ 483 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) 484 func = dev->driver->dma_ioctl; 485 486 if (!func) { 487 DRM_DEBUG("no function\n"); 488 retcode = -EINVAL; 489 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || 490 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) || 491 ((ioctl->flags & DRM_MASTER) && !file_priv->is_master)) { 492 retcode = -EACCES; 493 } else { 494 if (cmd & (IOC_IN | IOC_OUT)) { 495 kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 496 if (!kdata) { 497 retcode = -ENOMEM; 498 goto err_i1; 499 } 500 } 501 502 if (cmd & IOC_IN) { 503 if (copy_from_user(kdata, (void __user *)arg, 504 _IOC_SIZE(cmd)) != 0) { 505 retcode = -EFAULT; 506 goto err_i1; 507 } 508 } 509 retcode = func(dev, kdata, file_priv); 510 511 if ((retcode == 0) && (cmd & IOC_OUT)) { 512 if (copy_to_user((void __user *)arg, kdata, 513 _IOC_SIZE(cmd)) != 0) 514 retcode = -EFAULT; 515 } 516 } 517 518 err_i1: 519 if (kdata) 520 kfree(kdata); 521 atomic_dec(&dev->ioctl_count); 522 if (retcode) 523 DRM_DEBUG("ret = %x\n", retcode); 524 return retcode; 525 } 526 527 EXPORT_SYMBOL(drm_ioctl); 528 529 drm_local_map_t *drm_getsarea(struct drm_device *dev) 530 { 531 struct drm_map_list *entry; 532 533 list_for_each_entry(entry, &dev->maplist, head) { 534 if (entry->map && entry->map->type == _DRM_SHM && 535 (entry->map->flags & _DRM_CONTAINS_LOCK)) { 536 return entry->map; 537 } 538 } 539 return NULL; 540 } 541 EXPORT_SYMBOL(drm_getsarea); 542