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 static DEFINE_SPINLOCK(drm_minor_lock);
  74 struct idr drm_minors_idr;
  75
  76 struct class *drm_class;
  77 struct dentry *drm_debugfs_root;
  78
  79 int drm_err(const char *func, const char *format, ...)
  80 {
  81         struct va_format vaf;
  82         va_list args;
  83         int r;
  84
  85         va_start(args, format);
  86
  87         vaf.fmt = format;
  88         vaf.va = &args;
  89
  90         r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV", func, &vaf);
  91
  92         va_end(args);
  93
  94         return r;
  95 }
  96 EXPORT_SYMBOL(drm_err);
  97
  98 void drm_ut_debug_printk(unsigned int request_level,
  99                          const char *prefix,
 100                          const char *function_name,
 101                          const char *format, ...)
 102 {
 103         struct va_format vaf;
 104         va_list args;
 105
 106         if (drm_debug & request_level) {
 107                 va_start(args, format);
 108                 vaf.fmt = format;
 109                 vaf.va = &args;
 110
 111                 if (function_name)
 112                         printk(KERN_DEBUG "[%s:%s], %pV", prefix,
 113                                function_name, &vaf);
 114                 else
 115                         printk(KERN_DEBUG "%pV", &vaf);
 116                 va_end(args);
 117         }
 118 }
 119 EXPORT_SYMBOL(drm_ut_debug_printk);
 120
 121 struct drm_master *drm_master_create(struct drm_minor *minor)
 122 {
 123         struct drm_master *master;
 124
 125         master = kzalloc(sizeof(*master), GFP_KERNEL);
 126         if (!master)
 127                 return NULL;
 128
 129         kref_init(&master->refcount);
 130         spin_lock_init(&master->lock.spinlock);
 131         init_waitqueue_head(&master->lock.lock_queue);
 132         drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER);
 133         INIT_LIST_HEAD(&master->magicfree);
 134         master->minor = minor;
 135
 136         list_add_tail(&master->head, &minor->master_list);
 137
 138         return master;
 139 }
 140
 141 struct drm_master *drm_master_get(struct drm_master *master)
 142 {
 143         kref_get(&master->refcount);
 144         return master;
 145 }
 146 EXPORT_SYMBOL(drm_master_get);
 147
 148 static void drm_master_destroy(struct kref *kref)
 149 {
 150         struct drm_master *master = container_of(kref, struct drm_master, refcount);
 151         struct drm_magic_entry *pt, *next;
 152         struct drm_device *dev = master->minor->dev;
 153         struct drm_map_list *r_list, *list_temp;
 154
 155         list_del(&master->head);
 156
 157         if (dev->driver->master_destroy)
 158                 dev->driver->master_destroy(dev, master);
 159
 160         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
 161                 if (r_list->master == master) {
 162                         drm_rmmap_locked(dev, r_list->map);
 163                         r_list = NULL;
 164                 }
 165         }
 166
 167         if (master->unique) {
 168                 kfree(master->unique);
 169                 master->unique = NULL;
 170                 master->unique_len = 0;
 171         }
 172
 173         kfree(dev->devname);
 174         dev->devname = NULL;
 175
 176         list_for_each_entry_safe(pt, next, &master->magicfree, head) {
 177                 list_del(&pt->head);
 178                 drm_ht_remove_item(&master->magiclist, &pt->hash_item);
 179                 kfree(pt);
 180         }
 181
 182         drm_ht_remove(&master->magiclist);
 183
 184         kfree(master);
 185 }
 186
 187 void drm_master_put(struct drm_master **master)
 188 {
 189         kref_put(&(*master)->refcount, drm_master_destroy);
 190         *master = NULL;
 191 }
 192 EXPORT_SYMBOL(drm_master_put);
 193
 194 int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 195                         struct drm_file *file_priv)
 196 {
 197         int ret = 0;
 198
 199         if (file_priv->is_master)
 200                 return 0;
 201
 202         if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
 203                 return -EINVAL;
 204
 205         if (!file_priv->master)
 206                 return -EINVAL;
 207
 208         if (file_priv->minor->master)
 209                 return -EINVAL;
 210
 211         mutex_lock(&dev->struct_mutex);
 212         file_priv->minor->master = drm_master_get(file_priv->master);
 213         file_priv->is_master = 1;
 214         if (dev->driver->master_set) {
 215                 ret = dev->driver->master_set(dev, file_priv, false);
 216                 if (unlikely(ret != 0)) {
 217                         file_priv->is_master = 0;
 218                         drm_master_put(&file_priv->minor->master);
 219                 }
 220         }
 221         mutex_unlock(&dev->struct_mutex);
 222
 223         return ret;
 224 }
 225
 226 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 227                          struct drm_file *file_priv)
 228 {
 229         if (!file_priv->is_master)
 230                 return -EINVAL;
 231
 232         if (!file_priv->minor->master)
 233                 return -EINVAL;
 234
 235         mutex_lock(&dev->struct_mutex);
 236         if (dev->driver->master_drop)
 237                 dev->driver->master_drop(dev, file_priv, false);
 238         drm_master_put(&file_priv->minor->master);
 239         file_priv->is_master = 0;
 240         mutex_unlock(&dev->struct_mutex);
 241         return 0;
 242 }
 243
 244 /*
 245  * DRM Minors
 246  * A DRM device can provide several char-dev interfaces on the DRM-Major. Each
 247  * of them is represented by a drm_minor object. Depending on the capabilities
 248  * of the device-driver, different interfaces are registered.
 249  *
 250  * Minors can be accessed via dev->$minor_name. This pointer is either
 251  * NULL or a valid drm_minor pointer and stays valid as long as the device is
 252  * valid. This means, DRM minors have the same life-time as the underlying
 253  * device. However, this doesn't mean that the minor is active. Minors are
 254  * registered and unregistered dynamically according to device-state.
 255  */
 256
 257 static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
 258                                              unsigned int type)
 259 {
 260         switch (type) {
 261         case DRM_MINOR_LEGACY:
 262                 return &dev->primary;
 263         case DRM_MINOR_RENDER:
 264                 return &dev->render;
 265         case DRM_MINOR_CONTROL:
 266                 return &dev->control;
 267         default:
 268                 return NULL;
 269         }
 270 }
 271
 272 static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
 273 {
 274         struct drm_minor *minor;
 275
 276         minor = kzalloc(sizeof(*minor), GFP_KERNEL);
 277         if (!minor)
 278                 return -ENOMEM;
 279
 280         minor->type = type;
 281         minor->dev = dev;
 282         INIT_LIST_HEAD(&minor->master_list);
 283
 284         *drm_minor_get_slot(dev, type) = minor;
 285         return 0;
 286 }
 287
 288 static void drm_minor_free(struct drm_device *dev, unsigned int type)
 289 {
 290         struct drm_minor **slot;
 291
 292         slot = drm_minor_get_slot(dev, type);
 293         if (*slot) {
 294                 kfree(*slot);
 295                 *slot = NULL;
 296         }
 297 }
 298
 299 static int drm_minor_register(struct drm_device *dev, unsigned int type)
 300 {
 301         struct drm_minor *new_minor;
 302         unsigned long flags;
 303         int ret;
 304         int minor_id;
 305
 306         DRM_DEBUG("\n");
 307
 308         new_minor = *drm_minor_get_slot(dev, type);
 309         if (!new_minor)
 310                 return 0;
 311
 312         idr_preload(GFP_KERNEL);
 313         spin_lock_irqsave(&drm_minor_lock, flags);
 314         minor_id = idr_alloc(&drm_minors_idr,
 315                              NULL,
 316                              64 * type,
 317                              64 * (type + 1),
 318                              GFP_NOWAIT);
 319         spin_unlock_irqrestore(&drm_minor_lock, flags);
 320         idr_preload_end();
 321
 322         if (minor_id < 0)
 323                 return minor_id;
 324
 325         new_minor->index = minor_id;
 326
 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_id;
 331         }
 332
 333         ret = drm_sysfs_device_add(new_minor);
 334         if (ret) {
 335                 DRM_ERROR("DRM: Error sysfs_device_add.\n");
 336                 goto err_debugfs;
 337         }
 338
 339         /* replace NULL with @minor so lookups will succeed from now on */
 340         spin_lock_irqsave(&drm_minor_lock, flags);
 341         idr_replace(&drm_minors_idr, new_minor, new_minor->index);
 342         spin_unlock_irqrestore(&drm_minor_lock, flags);
 343
 344         DRM_DEBUG("new minor assigned %d\n", minor_id);
 345         return 0;
 346
 347 err_debugfs:
 348         drm_debugfs_cleanup(new_minor);
 349 err_id:
 350         spin_lock_irqsave(&drm_minor_lock, flags);
 351         idr_remove(&drm_minors_idr, minor_id);
 352         spin_unlock_irqrestore(&drm_minor_lock, flags);
 353         new_minor->index = 0;
 354         return ret;
 355 }
 356
 357 static void drm_minor_unregister(struct drm_device *dev, unsigned int type)
 358 {
 359         struct drm_minor *minor;
 360         unsigned long flags;
 361
 362         minor = *drm_minor_get_slot(dev, type);
 363         if (!minor || !minor->kdev)
 364                 return;
 365
 366         spin_lock_irqsave(&drm_minor_lock, flags);
 367         idr_remove(&drm_minors_idr, minor->index);
 368         spin_unlock_irqrestore(&drm_minor_lock, flags);
 369         minor->index = 0;
 370
 371         drm_debugfs_cleanup(minor);
 372         drm_sysfs_device_remove(minor);
 373 }
 374
 375 /**
 376  * drm_minor_acquire - Acquire a DRM minor
 377  * @minor_id: Minor ID of the DRM-minor
 378  *
 379  * Looks up the given minor-ID and returns the respective DRM-minor object. The
 380  * refence-count of the underlying device is increased so you must release this
 381  * object with drm_minor_release().
 382  *
 383  * As long as you hold this minor, it is guaranteed that the object and the
 384  * minor->dev pointer will stay valid! However, the device may get unplugged and
 385  * unregistered while you hold the minor.
 386  *
 387  * Returns:
 388  * Pointer to minor-object with increased device-refcount, or PTR_ERR on
 389  * failure.
 390  */
 391 struct drm_minor *drm_minor_acquire(unsigned int minor_id)
 392 {
 393         struct drm_minor *minor;
 394         unsigned long flags;
 395
 396         spin_lock_irqsave(&drm_minor_lock, flags);
 397         minor = idr_find(&drm_minors_idr, minor_id);
 398         if (minor)
 399                 drm_dev_ref(minor->dev);
 400         spin_unlock_irqrestore(&drm_minor_lock, flags);
 401
 402         if (!minor) {
 403                 return ERR_PTR(-ENODEV);
 404         } else if (drm_device_is_unplugged(minor->dev)) {
 405                 drm_dev_unref(minor->dev);
 406                 return ERR_PTR(-ENODEV);
 407         }
 408
 409         return minor;
 410 }
 411
 412 /**
 413  * drm_minor_release - Release DRM minor
 414  * @minor: Pointer to DRM minor object
 415  *
 416  * Release a minor that was previously acquired via drm_minor_acquire().
 417  */
 418 void drm_minor_release(struct drm_minor *minor)
 419 {
 420         drm_dev_unref(minor->dev);
 421 }
 422
 423 /**
 424  * Called via drm_exit() at module unload time or when pci device is
 425  * unplugged.
 426  *
 427  * Cleans up all DRM device, calling drm_lastclose().
 428  *
 429  */
 430 void drm_put_dev(struct drm_device *dev)
 431 {
 432         DRM_DEBUG("\n");
 433
 434         if (!dev) {
 435                 DRM_ERROR("cleanup called no dev\n");
 436                 return;
 437         }
 438
 439         drm_dev_unregister(dev);
 440         drm_dev_unref(dev);
 441 }
 442 EXPORT_SYMBOL(drm_put_dev);
 443
 444 void drm_unplug_dev(struct drm_device *dev)
 445 {
 446         /* for a USB device */
 447         drm_minor_unregister(dev, DRM_MINOR_LEGACY);
 448         drm_minor_unregister(dev, DRM_MINOR_RENDER);
 449         drm_minor_unregister(dev, DRM_MINOR_CONTROL);
 450
 451         mutex_lock(&drm_global_mutex);
 452
 453         drm_device_set_unplugged(dev);
 454
 455         if (dev->open_count == 0) {
 456                 drm_put_dev(dev);
 457         }
 458         mutex_unlock(&drm_global_mutex);
 459 }
 460 EXPORT_SYMBOL(drm_unplug_dev);
 461
 462 /**
 463  * drm_dev_alloc - Allocate new drm device
 464  * @driver: DRM driver to allocate device for
 465  * @parent: Parent device object
 466  *
 467  * Allocate and initialize a new DRM device. No device registration is done.
 468  * Call drm_dev_register() to advertice the device to user space and register it
 469  * with other core subsystems.
 470  *
 471  * The initial ref-count of the object is 1. Use drm_dev_ref() and
 472  * drm_dev_unref() to take and drop further ref-counts.
 473  *
 474  * RETURNS:
 475  * Pointer to new DRM device, or NULL if out of memory.
 476  */
 477 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
 478                                  struct device *parent)
 479 {
 480         struct drm_device *dev;
 481         int ret;
 482
 483         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 484         if (!dev)
 485                 return NULL;
 486
 487         kref_init(&dev->ref);
 488         dev->dev = parent;
 489         dev->driver = driver;
 490
 491         INIT_LIST_HEAD(&dev->filelist);
 492         INIT_LIST_HEAD(&dev->ctxlist);
 493         INIT_LIST_HEAD(&dev->vmalist);
 494         INIT_LIST_HEAD(&dev->maplist);
 495         INIT_LIST_HEAD(&dev->vblank_event_list);
 496
 497         spin_lock_init(&dev->count_lock);
 498         spin_lock_init(&dev->event_lock);
 499         mutex_init(&dev->struct_mutex);
 500         mutex_init(&dev->ctxlist_mutex);
 501
 502         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 503                 ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);
 504                 if (ret)
 505                         goto err_minors;
 506         }
 507
 508         if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {
 509                 ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
 510                 if (ret)
 511                         goto err_minors;
 512         }
 513
 514         ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY);
 515         if (ret)
 516                 goto err_minors;
 517
 518         if (drm_ht_create(&dev->map_hash, 12))
 519                 goto err_minors;
 520
 521         ret = drm_ctxbitmap_init(dev);
 522         if (ret) {
 523                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 524                 goto err_ht;
 525         }
 526
 527         if (driver->driver_features & DRIVER_GEM) {
 528                 ret = drm_gem_init(dev);
 529                 if (ret) {
 530                         DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
 531                         goto err_ctxbitmap;
 532                 }
 533         }
 534
 535         return dev;
 536
 537 err_ctxbitmap:
 538         drm_ctxbitmap_cleanup(dev);
 539 err_ht:
 540         drm_ht_remove(&dev->map_hash);
 541 err_minors:
 542         drm_minor_free(dev, DRM_MINOR_LEGACY);
 543         drm_minor_free(dev, DRM_MINOR_RENDER);
 544         drm_minor_free(dev, DRM_MINOR_CONTROL);
 545         kfree(dev);
 546         return NULL;
 547 }
 548 EXPORT_SYMBOL(drm_dev_alloc);
 549
 550 static void drm_dev_release(struct kref *ref)
 551 {
 552         struct drm_device *dev = container_of(ref, struct drm_device, ref);
 553
 554         if (dev->driver->driver_features & DRIVER_GEM)
 555                 drm_gem_destroy(dev);
 556
 557         drm_ctxbitmap_cleanup(dev);
 558         drm_ht_remove(&dev->map_hash);
 559
 560         drm_minor_free(dev, DRM_MINOR_LEGACY);
 561         drm_minor_free(dev, DRM_MINOR_RENDER);
 562         drm_minor_free(dev, DRM_MINOR_CONTROL);
 563
 564         kfree(dev->devname);
 565         kfree(dev);
 566 }
 567
 568 /**
 569  * drm_dev_ref - Take reference of a DRM device
 570  * @dev: device to take reference of or NULL
 571  *
 572  * This increases the ref-count of @dev by one. You *must* already own a
 573  * reference when calling this. Use drm_dev_unref() to drop this reference
 574  * again.
 575  *
 576  * This function never fails. However, this function does not provide *any*
 577  * guarantee whether the device is alive or running. It only provides a
 578  * reference to the object and the memory associated with it.
 579  */
 580 void drm_dev_ref(struct drm_device *dev)
 581 {
 582         if (dev)
 583                 kref_get(&dev->ref);
 584 }
 585 EXPORT_SYMBOL(drm_dev_ref);
 586
 587 /**
 588  * drm_dev_unref - Drop reference of a DRM device
 589  * @dev: device to drop reference of or NULL
 590  *
 591  * This decreases the ref-count of @dev by one. The device is destroyed if the
 592  * ref-count drops to zero.
 593  */
 594 void drm_dev_unref(struct drm_device *dev)
 595 {
 596         if (dev)
 597                 kref_put(&dev->ref, drm_dev_release);
 598 }
 599 EXPORT_SYMBOL(drm_dev_unref);
 600
 601 /**
 602  * drm_dev_register - Register DRM device
 603  * @dev: Device to register
 604  *
 605  * Register the DRM device @dev with the system, advertise device to user-space
 606  * and start normal device operation. @dev must be allocated via drm_dev_alloc()
 607  * previously.
 608  *
 609  * Never call this twice on any device!
 610  *
 611  * RETURNS:
 612  * 0 on success, negative error code on failure.
 613  */
 614 int drm_dev_register(struct drm_device *dev, unsigned long flags)
 615 {
 616         int ret;
 617
 618         mutex_lock(&drm_global_mutex);
 619
 620         ret = drm_minor_register(dev, DRM_MINOR_CONTROL);
 621         if (ret)
 622                 goto err_minors;
 623
 624         ret = drm_minor_register(dev, DRM_MINOR_RENDER);
 625         if (ret)
 626                 goto err_minors;
 627
 628         ret = drm_minor_register(dev, DRM_MINOR_LEGACY);
 629         if (ret)
 630                 goto err_minors;
 631
 632         if (dev->driver->load) {
 633                 ret = dev->driver->load(dev, flags);
 634                 if (ret)
 635                         goto err_minors;
 636         }
 637
 638         /* setup grouping for legacy outputs */
 639         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 640                 ret = drm_mode_group_init_legacy_group(dev,
 641                                 &dev->primary->mode_group);
 642                 if (ret)
 643                         goto err_unload;
 644         }
 645
 646         ret = 0;
 647         goto out_unlock;
 648
 649 err_unload:
 650         if (dev->driver->unload)
 651                 dev->driver->unload(dev);
 652 err_minors:
 653         drm_minor_unregister(dev, DRM_MINOR_LEGACY);
 654         drm_minor_unregister(dev, DRM_MINOR_RENDER);
 655         drm_minor_unregister(dev, DRM_MINOR_CONTROL);
 656 out_unlock:
 657         mutex_unlock(&drm_global_mutex);
 658         return ret;
 659 }
 660 EXPORT_SYMBOL(drm_dev_register);
 661
 662 /**
 663  * drm_dev_unregister - Unregister DRM device
 664  * @dev: Device to unregister
 665  *
 666  * Unregister the DRM device from the system. This does the reverse of
 667  * drm_dev_register() but does not deallocate the device. The caller must call
 668  * drm_dev_unref() to drop their final reference.
 669  */
 670 void drm_dev_unregister(struct drm_device *dev)
 671 {
 672         struct drm_map_list *r_list, *list_temp;
 673
 674         drm_lastclose(dev);
 675
 676         if (dev->driver->unload)
 677                 dev->driver->unload(dev);
 678
 679         if (dev->agp)
 680                 drm_pci_agp_destroy(dev);
 681
 682         drm_vblank_cleanup(dev);
 683
 684         list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
 685                 drm_rmmap(dev, r_list->map);
 686
 687         drm_minor_unregister(dev, DRM_MINOR_LEGACY);
 688         drm_minor_unregister(dev, DRM_MINOR_RENDER);
 689         drm_minor_unregister(dev, DRM_MINOR_CONTROL);
 690 }
 691 EXPORT_SYMBOL(drm_dev_unregister);