drivers/gpu/drm/drm_stub.c

   1 /**
   2  * \file drm_stub.h
   3  * Stub support
   4  *
   5  * \author Rickard E. (Rik) Faith <faith@valinux.com>
   6  */
   7
   8 /*
   9  * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
  10  *
  11  * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
  12  * All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice (including the next
  22  * paragraph) shall be included in all copies or substantial portions of the
  23  * Software.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  26  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  27  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  28  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  29  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  30  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  31  * DEALINGS IN THE SOFTWARE.
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/slab.h>
  37 #include <drm/drmP.h>
  38 #include <drm/drm_core.h>
  39
  40 unsigned int drm_debug = 0;     /* 1 to enable debug output */
  41 EXPORT_SYMBOL(drm_debug);
  42
  43 unsigned int drm_rnodes = 0;    /* 1 to enable experimental render nodes API */
  44 EXPORT_SYMBOL(drm_rnodes);
  45
  46 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  47 EXPORT_SYMBOL(drm_vblank_offdelay);
  48
  49 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  50 EXPORT_SYMBOL(drm_timestamp_precision);
  51
  52 /*
  53  * Default to use monotonic timestamps for wait-for-vblank and page-flip
  54  * complete events.
  55  */
  56 unsigned int drm_timestamp_monotonic = 1;
  57
  58 MODULE_AUTHOR(CORE_AUTHOR);
  59 MODULE_DESCRIPTION(CORE_DESC);
  60 MODULE_LICENSE("GPL and additional rights");
  61 MODULE_PARM_DESC(debug, "Enable debug output");
  62 MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API");
  63 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]");
  64 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
  65 MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
  66
  67 module_param_named(debug, drm_debug, int, 0600);
  68 module_param_named(rnodes, drm_rnodes, int, 0600);
  69 module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
  70 module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
  71 module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);
  72
  73 struct idr drm_minors_idr;
  74
  75 struct class *drm_class;
  76 struct dentry *drm_debugfs_root;
  77
  78 int drm_err(const char *func, const char *format, ...)
  79 {
  80         struct va_format vaf;
  81         va_list args;
  82         int r;
  83
  84         va_start(args, format);
  85
  86         vaf.fmt = format;
  87         vaf.va = &args;
  88
  89         r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
  90
  91         va_end(args);
  92
  93         return r;
  94 }
  95 EXPORT_SYMBOL(drm_err);
  96
  97 void drm_ut_debug_printk(unsigned int request_level,
  98                          const char *prefix,
  99                          const char *function_name,
 100                          const char *format, ...)
 101 {
 102         struct va_format vaf;
 103         va_list args;
 104
 105         if (drm_debug & request_level) {
 106                 va_start(args, format);
 107                 vaf.fmt = format;
 108                 vaf.va = &args;
 109
 110                 if (function_name)
 111                         printk(KERN_DEBUG "[%s:%s], %pV", prefix,
 112                                function_name, &vaf);
 113                 else
 114                         printk(KERN_DEBUG "%pV", &vaf);
 115                 va_end(args);
 116         }
 117 }
 118 EXPORT_SYMBOL(drm_ut_debug_printk);
 119
 120 static int drm_minor_get_id(struct drm_device *dev, int type)
 121 {
 122         int ret;
 123         int base = 0, limit = 63;
 124
 125         if (type == DRM_MINOR_CONTROL) {
 126                 base += 64;
 127                 limit = base + 63;
 128         } else if (type == DRM_MINOR_RENDER) {
 129                 base += 128;
 130                 limit = base + 63;
 131         }
 132
 133         mutex_lock(&dev->struct_mutex);
 134         ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
 135         mutex_unlock(&dev->struct_mutex);
 136
 137         return ret == -ENOSPC ? -EINVAL : ret;
 138 }
 139
 140 struct drm_master *drm_master_create(struct drm_minor *minor)
 141 {
 142         struct drm_master *master;
 143
 144         master = kzalloc(sizeof(*master), GFP_KERNEL);
 145         if (!master)
 146                 return NULL;
 147
 148         kref_init(&master->refcount);
 149         spin_lock_init(&master->lock.spinlock);
 150         init_waitqueue_head(&master->lock.lock_queue);
 151         drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
 152         INIT_LIST_HEAD(&master->magicfree);
 153         master->minor = minor;
 154
 155         list_add_tail(&master->head, &minor->master_list);
 156
 157         return master;
 158 }
 159
 160 struct drm_master *drm_master_get(struct drm_master *master)
 161 {
 162         kref_get(&master->refcount);
 163         return master;
 164 }
 165 EXPORT_SYMBOL(drm_master_get);
 166
 167 static void drm_master_destroy(struct kref *kref)
 168 {
 169         struct drm_master *master = container_of(kref, struct drm_master, refcount);
 170         struct drm_magic_entry *pt, *next;
 171         struct drm_device *dev = master->minor->dev;
 172         struct drm_map_list *r_list, *list_temp;
 173
 174         list_del(&master->head);
 175
 176         if (dev->driver->master_destroy)
 177                 dev->driver->master_destroy(dev, master);
 178
 179         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
 180                 if (r_list->master == master) {
 181                         drm_rmmap_locked(dev, r_list->map);
 182                         r_list = NULL;
 183                 }
 184         }
 185
 186         if (master->unique) {
 187                 kfree(master->unique);
 188                 master->unique = NULL;
 189                 master->unique_len = 0;
 190         }
 191
 192         kfree(dev->devname);
 193         dev->devname = NULL;
 194
 195         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
 196                 list_del(&pt->head);
 197                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
 198                 kfree(pt);
 199         }
 200
 201         drm_ht_remove(&master->magiclist);
 202
 203         kfree(master);
 204 }
 205
 206 void drm_master_put(struct drm_master **master)
 207 {
 208         kref_put(&(*master)->refcount, drm_master_destroy);
 209         *master = NULL;
 210 }
 211 EXPORT_SYMBOL(drm_master_put);
 212
 213 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 214                         struct drm_file *file_priv)
 215 {
 216         int ret = 0;
 217
 218         if (file_priv->is_master)
 219                 return 0;
 220
 221         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
 222                 return -EINVAL;
 223
 224         if (!file_priv->master)
 225                 return -EINVAL;
 226
 227         if (file_priv->minor->master)
 228                 return -EINVAL;
 229
 230         mutex_lock(&dev->struct_mutex);
 231         file_priv->minor->master = drm_master_get(file_priv->master);
 232         file_priv->is_master = 1;
 233         if (dev->driver->master_set) {
 234                 ret = dev->driver->master_set(dev, file_priv, false);
 235                 if (unlikely(ret != 0)) {
 236                         file_priv->is_master = 0;
 237                         drm_master_put(&file_priv->minor->master);
 238                 }
 239         }
 240         mutex_unlock(&dev->struct_mutex);
 241
 242         return ret;
 243 }
 244
 245 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 246                          struct drm_file *file_priv)
 247 {
 248         if (!file_priv->is_master)
 249                 return -EINVAL;
 250
 251         if (!file_priv->minor->master)
 252                 return -EINVAL;
 253
 254         mutex_lock(&dev->struct_mutex);
 255         if (dev->driver->master_drop)
 256                 dev->driver->master_drop(dev, file_priv, false);
 257         drm_master_put(&file_priv->minor->master);
 258         file_priv->is_master = 0;
 259         mutex_unlock(&dev->struct_mutex);
 260         return 0;
 261 }
 262
 263 static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
 264                                              unsigned int type)
 265 {
 266         switch (type) {
 267         case DRM_MINOR_LEGACY:
 268                 return &dev->primary;
 269         case DRM_MINOR_RENDER:
 270                 return &dev->render;
 271         case DRM_MINOR_CONTROL:
 272                 return &dev->control;
 273         default:
 274                 return NULL;
 275         }
 276 }
 277
 278 static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
 279 {
 280         struct drm_minor *minor;
 281
 282         minor = kzalloc(sizeof(*minor), GFP_KERNEL);
 283         if (!minor)
 284                 return -ENOMEM;
 285
 286         minor->type = type;
 287         minor->dev = dev;
 288         INIT_LIST_HEAD(&minor->master_list);
 289
 290         *drm_minor_get_slot(dev, type) = minor;
 291         return 0;
 292 }
 293
 294 /**
 295  * drm_get_minor - Register DRM minor
 296  * @dev: DRM device
 297  * @type: Type of minor
 298  *
 299  * Register minor of given type.
 300  * Caller must hold the global DRM mutex.
 301  *
 302  * RETURNS:
 303  * 0 on success, negative error code on failure.
 304  */
 305 static int drm_get_minor(struct drm_device *dev, unsigned int type)
 306 {
 307         struct drm_minor *new_minor;
 308         int ret;
 309         int minor_id;
 310
 311         DRM_DEBUG("\n");
 312
 313         new_minor = *drm_minor_get_slot(dev, type);
 314         if (!new_minor)
 315                 return 0;
 316
 317         minor_id = drm_minor_get_id(dev, type);
 318         if (minor_id < 0)
 319                 return minor_id;
 320
 321         new_minor->device = MKDEV(DRM_MAJOR, minor_id);
 322         new_minor->index = minor_id;
 323
 324         idr_replace(&drm_minors_idr, new_minor, minor_id);
 325
 326 #if defined(CONFIG_DEBUG_FS)
 327         ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root);
 328         if (ret) {
 329                 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
 330                 goto err_mem;
 331         }
 332 #endif
 333
 334         ret = drm_sysfs_device_add(new_minor);
 335         if (ret) {
 336                 printk(KERN_ERR
 337                        "DRM: Error sysfs_device_add.\n");
 338                 goto err_debugfs;
 339         }
 340
 341         DRM_DEBUG("new minor assigned %d\n", minor_id);
 342         return 0;
 343
 344
 345 err_debugfs:
 346 #if defined(CONFIG_DEBUG_FS)
 347         drm_debugfs_cleanup(new_minor);
 348 err_mem:
 349 #endif
 350         idr_remove(&drm_minors_idr, minor_id);
 351         return ret;
 352 }
 353
 354 /**
 355  * drm_unplug_minor - Unplug DRM minor
 356  * @minor: Minor to unplug
 357  *
 358  * Unplugs the given DRM minor but keeps the object. So after this returns,
 359  * minor->dev is still valid so existing open-files can still access it to get
 360  * device information from their drm_file ojects.
 361  * If the minor is already unplugged or if @minor is NULL, nothing is done.
 362  * The global DRM mutex must be held by the caller.
 363  */
 364 static void drm_unplug_minor(struct drm_minor *minor)
 365 {
 366         if (!minor || !minor->kdev)
 367                 return;
 368
 369 #if defined(CONFIG_DEBUG_FS)
 370         drm_debugfs_cleanup(minor);
 371 #endif
 372
 373         drm_sysfs_device_remove(minor);
 374         idr_remove(&drm_minors_idr, minor->index);
 375 }
 376
 377 /**
 378  * drm_minor_acquire - Acquire a DRM minor
 379  * @minor_id: Minor ID of the DRM-minor
 380  *
 381  * Looks up the given minor-ID and returns the respective DRM-minor object. The
 382  * refence-count of the underlying device is increased so you must release this
 383  * object with drm_minor_release().
 384  *
 385  * As long as you hold this minor, it is guaranteed that the object and the
 386  * minor->dev pointer will stay valid! However, the device may get unplugged and
 387  * unregistered while you hold the minor.
 388  *
 389  * Returns:
 390  * Pointer to minor-object with increased device-refcount, or PTR_ERR on
 391  * failure.
 392  */
 393 struct drm_minor *drm_minor_acquire(unsigned int minor_id)
 394 {
 395         struct drm_minor *minor;
 396
 397         minor = idr_find(&drm_minors_idr, minor_id);
 398         if (!minor)
 399                 return ERR_PTR(-ENODEV);
 400
 401         drm_dev_ref(minor->dev);
 402         return minor;
 403 }
 404
 405 /**
 406  * drm_minor_release - Release DRM minor
 407  * @minor: Pointer to DRM minor object
 408  *
 409  * Release a minor that was previously acquired via drm_minor_acquire().
 410  */
 411 void drm_minor_release(struct drm_minor *minor)
 412 {
 413         drm_dev_unref(minor->dev);
 414 }
 415
 416 /**
 417  * drm_put_minor - Destroy DRM minor
 418  * @minor: Minor to destroy
 419  *
 420  * This calls drm_unplug_minor() on the given minor and then frees it. Nothing
 421  * is done if @minor is NULL. It is fine to call this on already unplugged
 422  * minors.
 423  * The global DRM mutex must be held by the caller.
 424  */
 425 static void drm_put_minor(struct drm_minor *minor)
 426 {
 427         if (!minor)
 428                 return;
 429
 430         DRM_DEBUG("release secondary minor %d\n", minor->index);
 431
 432         drm_unplug_minor(minor);
 433         kfree(minor);
 434 }
 435
 436 /**
 437  * Called via drm_exit() at module unload time or when pci device is
 438  * unplugged.
 439  *
 440  * Cleans up all DRM device, calling drm_lastclose().
 441  *
 442  */
 443 void drm_put_dev(struct drm_device *dev)
 444 {
 445         DRM_DEBUG("\n");
 446
 447         if (!dev) {
 448                 DRM_ERROR("cleanup called no dev\n");
 449                 return;
 450         }
 451
 452         drm_dev_unregister(dev);
 453         drm_dev_unref(dev);
 454 }
 455 EXPORT_SYMBOL(drm_put_dev);
 456
 457 void drm_unplug_dev(struct drm_device *dev)
 458 {
 459         /* for a USB device */
 460         if (drm_core_check_feature(dev, DRIVER_MODESET))
 461                 drm_unplug_minor(dev->control);
 462         if (dev->render)
 463                 drm_unplug_minor(dev->render);
 464         drm_unplug_minor(dev->primary);
 465
 466         mutex_lock(&drm_global_mutex);
 467
 468         drm_device_set_unplugged(dev);
 469
 470         if (dev->open_count == 0) {
 471                 drm_put_dev(dev);
 472         }
 473         mutex_unlock(&drm_global_mutex);
 474 }
 475 EXPORT_SYMBOL(drm_unplug_dev);
 476
 477 /**
 478  * drm_dev_alloc - Allocate new drm device
 479  * @driver: DRM driver to allocate device for
 480  * @parent: Parent device object
 481  *
 482  * Allocate and initialize a new DRM device. No device registration is done.
 483  * Call drm_dev_register() to advertice the device to user space and register it
 484  * with other core subsystems.
 485  *
 486  * The initial ref-count of the object is 1. Use drm_dev_ref() and
 487  * drm_dev_unref() to take and drop further ref-counts.
 488  *
 489  * RETURNS:
 490  * Pointer to new DRM device, or NULL if out of memory.
 491  */
 492 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
 493                                  struct device *parent)
 494 {
 495         struct drm_device *dev;
 496         int ret;
 497
 498         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 499         if (!dev)
 500                 return NULL;
 501
 502         kref_init(&dev->ref);
 503         dev->dev = parent;
 504         dev->driver = driver;
 505
 506         INIT_LIST_HEAD(&dev->filelist);
 507         INIT_LIST_HEAD(&dev->ctxlist);
 508         INIT_LIST_HEAD(&dev->vmalist);
 509         INIT_LIST_HEAD(&dev->maplist);
 510         INIT_LIST_HEAD(&dev->vblank_event_list);
 511
 512         spin_lock_init(&dev->count_lock);
 513         spin_lock_init(&dev->event_lock);
 514         mutex_init(&dev->struct_mutex);
 515         mutex_init(&dev->ctxlist_mutex);
 516
 517         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 518                 ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);
 519                 if (ret)
 520                         goto err_minors;
 521         }
 522
 523         if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {
 524                 ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
 525                 if (ret)
 526                         goto err_minors;
 527         }
 528
 529         ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY);
 530         if (ret)
 531                 goto err_minors;
 532
 533         if (drm_ht_create(&dev->map_hash, 12))
 534                 goto err_minors;
 535
 536         ret = drm_ctxbitmap_init(dev);
 537         if (ret) {
 538                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 539                 goto err_ht;
 540         }
 541
 542         if (driver->driver_features & DRIVER_GEM) {
 543                 ret = drm_gem_init(dev);
 544                 if (ret) {
 545                         DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
 546                         goto err_ctxbitmap;
 547                 }
 548         }
 549
 550         return dev;
 551
 552 err_ctxbitmap:
 553         drm_ctxbitmap_cleanup(dev);
 554 err_ht:
 555         drm_ht_remove(&dev->map_hash);
 556 err_minors:
 557         drm_put_minor(dev->control);
 558         drm_put_minor(dev->render);
 559         drm_put_minor(dev->primary);
 560         kfree(dev);
 561         return NULL;
 562 }
 563 EXPORT_SYMBOL(drm_dev_alloc);
 564
 565 static void drm_dev_release(struct kref *ref)
 566 {
 567         struct drm_device *dev = container_of(ref, struct drm_device, ref);
 568
 569         drm_put_minor(dev->control);
 570         drm_put_minor(dev->render);
 571         drm_put_minor(dev->primary);
 572
 573         if (dev->driver->driver_features & DRIVER_GEM)
 574                 drm_gem_destroy(dev);
 575
 576         drm_ctxbitmap_cleanup(dev);
 577         drm_ht_remove(&dev->map_hash);
 578
 579         kfree(dev->devname);
 580         kfree(dev);
 581 }
 582
 583 /**
 584  * drm_dev_ref - Take reference of a DRM device
 585  * @dev: device to take reference of or NULL
 586  *
 587  * This increases the ref-count of @dev by one. You *must* already own a
 588  * reference when calling this. Use drm_dev_unref() to drop this reference
 589  * again.
 590  *
 591  * This function never fails. However, this function does not provide *any*
 592  * guarantee whether the device is alive or running. It only provides a
 593  * reference to the object and the memory associated with it.
 594  */
 595 void drm_dev_ref(struct drm_device *dev)
 596 {
 597         if (dev)
 598                 kref_get(&dev->ref);
 599 }
 600 EXPORT_SYMBOL(drm_dev_ref);
 601
 602 /**
 603  * drm_dev_unref - Drop reference of a DRM device
 604  * @dev: device to drop reference of or NULL
 605  *
 606  * This decreases the ref-count of @dev by one. The device is destroyed if the
 607  * ref-count drops to zero.
 608  */
 609 void drm_dev_unref(struct drm_device *dev)
 610 {
 611         if (dev)
 612                 kref_put(&dev->ref, drm_dev_release);
 613 }
 614 EXPORT_SYMBOL(drm_dev_unref);
 615
 616 /**
 617  * drm_dev_register - Register DRM device
 618  * @dev: Device to register
 619  *
 620  * Register the DRM device @dev with the system, advertise device to user-space
 621  * and start normal device operation. @dev must be allocated via drm_dev_alloc()
 622  * previously.
 623  *
 624  * Never call this twice on any device!
 625  *
 626  * RETURNS:
 627  * 0 on success, negative error code on failure.
 628  */
 629 int drm_dev_register(struct drm_device *dev, unsigned long flags)
 630 {
 631         int ret;
 632
 633         mutex_lock(&drm_global_mutex);
 634
 635         ret = drm_get_minor(dev, DRM_MINOR_CONTROL);
 636         if (ret)
 637                 goto err_minors;
 638
 639         ret = drm_get_minor(dev, DRM_MINOR_RENDER);
 640         if (ret)
 641                 goto err_minors;
 642
 643         ret = drm_get_minor(dev, DRM_MINOR_LEGACY);
 644         if (ret)
 645                 goto err_minors;
 646
 647         if (dev->driver->load) {
 648                 ret = dev->driver->load(dev, flags);
 649                 if (ret)
 650                         goto err_minors;
 651         }
 652
 653         /* setup grouping for legacy outputs */
 654         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 655                 ret = drm_mode_group_init_legacy_group(dev,
 656                                 &dev->primary->mode_group);
 657                 if (ret)
 658                         goto err_unload;
 659         }
 660
 661         ret = 0;
 662         goto out_unlock;
 663
 664 err_unload:
 665         if (dev->driver->unload)
 666                 dev->driver->unload(dev);
 667 err_minors:
 668         drm_unplug_minor(dev->control);
 669         drm_unplug_minor(dev->render);
 670         drm_unplug_minor(dev->primary);
 671 out_unlock:
 672         mutex_unlock(&drm_global_mutex);
 673         return ret;
 674 }
 675 EXPORT_SYMBOL(drm_dev_register);
 676
 677 /**
 678  * drm_dev_unregister - Unregister DRM device
 679  * @dev: Device to unregister
 680  *
 681  * Unregister the DRM device from the system. This does the reverse of
 682  * drm_dev_register() but does not deallocate the device. The caller must call
 683  * drm_dev_unref() to drop their final reference.
 684  */
 685 void drm_dev_unregister(struct drm_device *dev)
 686 {
 687         struct drm_map_list *r_list, *list_temp;
 688
 689         drm_lastclose(dev);
 690
 691         if (dev->driver->unload)
 692                 dev->driver->unload(dev);
 693
 694         if (dev->agp)
 695                 drm_pci_agp_destroy(dev);
 696
 697         drm_vblank_cleanup(dev);
 698
 699         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
 700                 drm_rmmap(dev, r_list->map);
 701
 702         drm_unplug_minor(dev->control);
 703         drm_unplug_minor(dev->render);
 704         drm_unplug_minor(dev->primary);
 705 }
 706 EXPORT_SYMBOL(drm_dev_unregister);