linux-core/drm_drv.c

   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 #include "drmP.h"
  49 #include "drm_core.h"
  50
  51 static void drm_cleanup(struct drm_device * dev);
  52 int drm_fb_loaded = 0;
  53
  54 static int drm_version(struct drm_device *dev, void *data,
  55                        struct drm_file *file_priv);
  56
  57 /** Ioctl table */
  58 static struct drm_ioctl_desc drm_ioctls[] = {
  59         DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
  60         DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
  61         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
  62         DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
  63         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
  64         DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
  65         DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
  66         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
  67
  68         DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  69         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  70         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  71         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  72
  73         DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  74         DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
  75
  76         DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  77         DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
  78
  79         DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
  80         DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  81         DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  82         DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
  83         DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  84         DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  85         DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
  86
  87         DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  88         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  89
  90         DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
  91         DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
  92
  93         DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
  94
  95         DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  96         DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  97         DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
  98         DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
  99         DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
 100         /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
 101         DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH),
 102
 103         DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 104
 105 #if __OS_HAS_AGP
 106         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 107         DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 108         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 109         DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
 110         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 111         DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 112         DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 113         DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 114 #endif
 115
 116         DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 117         DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 118         DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0),
 119
 120         DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
 121
 122         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 123
 124         DRM_IOCTL_DEF(DRM_IOCTL_MM_INIT, drm_mm_init_ioctl,
 125                       DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 126         DRM_IOCTL_DEF(DRM_IOCTL_MM_TAKEDOWN, drm_mm_takedown_ioctl,
 127                       DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 128         DRM_IOCTL_DEF(DRM_IOCTL_MM_LOCK, drm_mm_lock_ioctl,
 129                       DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 130         DRM_IOCTL_DEF(DRM_IOCTL_MM_UNLOCK, drm_mm_unlock_ioctl,
 131                       DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 132
 133         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_CREATE, drm_fence_create_ioctl, DRM_AUTH),
 134         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_REFERENCE, drm_fence_reference_ioctl, DRM_AUTH),
 135         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_UNREFERENCE, drm_fence_unreference_ioctl, DRM_AUTH),
 136         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_SIGNALED, drm_fence_signaled_ioctl, DRM_AUTH),
 137         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_FLUSH, drm_fence_flush_ioctl, DRM_AUTH),
 138         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_WAIT, drm_fence_wait_ioctl, DRM_AUTH),
 139         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_EMIT, drm_fence_emit_ioctl, DRM_AUTH),
 140         DRM_IOCTL_DEF(DRM_IOCTL_FENCE_BUFFERS, drm_fence_buffers_ioctl, DRM_AUTH),
 141
 142         DRM_IOCTL_DEF(DRM_IOCTL_BO_CREATE, drm_bo_create_ioctl, DRM_AUTH),
 143         DRM_IOCTL_DEF(DRM_IOCTL_BO_MAP, drm_bo_map_ioctl, DRM_AUTH),
 144         DRM_IOCTL_DEF(DRM_IOCTL_BO_UNMAP, drm_bo_unmap_ioctl, DRM_AUTH),
 145         DRM_IOCTL_DEF(DRM_IOCTL_BO_REFERENCE, drm_bo_reference_ioctl, DRM_AUTH),
 146         DRM_IOCTL_DEF(DRM_IOCTL_BO_UNREFERENCE, drm_bo_unreference_ioctl, DRM_AUTH),
 147         DRM_IOCTL_DEF(DRM_IOCTL_BO_SETSTATUS, drm_bo_setstatus_ioctl, DRM_AUTH),
 148         DRM_IOCTL_DEF(DRM_IOCTL_BO_INFO, drm_bo_info_ioctl, DRM_AUTH),
 149         DRM_IOCTL_DEF(DRM_IOCTL_BO_WAIT_IDLE, drm_bo_wait_idle_ioctl, DRM_AUTH),
 150         DRM_IOCTL_DEF(DRM_IOCTL_BO_VERSION, drm_bo_version_ioctl, 0),
 151 };
 152
 153 #define DRM_CORE_IOCTL_COUNT    ARRAY_SIZE( drm_ioctls )
 154
 155
 156 /**
 157  * Take down the DRM device.
 158  *
 159  * \param dev DRM device structure.
 160  *
 161  * Frees every resource in \p dev.
 162  *
 163  * \sa drm_device
 164  */
 165 int drm_lastclose(struct drm_device * dev)
 166 {
 167         struct drm_magic_entry *pt, *next;
 168         struct drm_map_list *r_list, *list_t;
 169         struct drm_vma_entry *vma, *vma_temp;
 170         int i;
 171
 172         DRM_DEBUG("\n");
 173
 174         /*
 175          * We can't do much about this function failing.
 176          */
 177
 178         drm_bo_driver_finish(dev);
 179
 180         if (dev->driver->lastclose)
 181                 dev->driver->lastclose(dev);
 182         DRM_DEBUG("driver lastclose completed\n");
 183
 184         if (dev->unique) {
 185                 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
 186                 dev->unique = NULL;
 187                 dev->unique_len = 0;
 188         }
 189
 190         if (dev->irq_enabled)
 191                 drm_irq_uninstall(dev);
 192
 193         /* Free drawable information memory */
 194         mutex_lock(&dev->struct_mutex);
 195
 196         drm_drawable_free_all(dev);
 197         del_timer(&dev->timer);
 198
 199         if (dev->unique) {
 200                 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
 201                 dev->unique = NULL;
 202                 dev->unique_len = 0;
 203         }
 204
 205         if (dev->magicfree.next) {
 206                 list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
 207                         list_del(&pt->head);
 208                         drm_ht_remove_item(&dev->magiclist, &pt->hash_item);
 209                         drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
 210                 }
 211                 drm_ht_remove(&dev->magiclist);
 212         }
 213
 214
 215         /* Clear AGP information */
 216         if (drm_core_has_AGP(dev) && dev->agp) {
 217                 struct drm_agp_mem *entry, *tempe;
 218
 219                 /* Remove AGP resources, but leave dev->agp
 220                    intact until drv_cleanup is called. */
 221                 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
 222                         if (entry->bound)
 223                                 drm_unbind_agp(entry->memory);
 224                         drm_free_agp(entry->memory, entry->pages);
 225                         drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
 226                 }
 227                 INIT_LIST_HEAD(&dev->agp->memory);
 228
 229                 if (dev->agp->acquired)
 230                         drm_agp_release(dev);
 231
 232                 dev->agp->acquired = 0;
 233                 dev->agp->enabled = 0;
 234         }
 235         if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
 236                 drm_sg_cleanup(dev->sg);
 237                 dev->sg = NULL;
 238         }
 239
 240         /* Clear vma list (only built for debugging) */
 241         list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
 242                 list_del(&vma->head);
 243                 drm_ctl_free(vma, sizeof(*vma), DRM_MEM_VMAS);
 244         }
 245
 246         list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
 247                 if (!(r_list->map->flags & _DRM_DRIVER)) {
 248                         drm_rmmap_locked(dev, r_list->map);
 249                         r_list = NULL;
 250                 }
 251         }
 252
 253         if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
 254                 for (i = 0; i < dev->queue_count; i++) {
 255
 256                         if (dev->queuelist[i]) {
 257                                 drm_free(dev->queuelist[i],
 258                                          sizeof(*dev->queuelist[0]),
 259                                          DRM_MEM_QUEUES);
 260                                 dev->queuelist[i] = NULL;
 261                         }
 262                 }
 263                 drm_free(dev->queuelist,
 264                          dev->queue_slots * sizeof(*dev->queuelist),
 265                          DRM_MEM_QUEUES);
 266                 dev->queuelist = NULL;
 267         }
 268         dev->queue_count = 0;
 269
 270         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
 271                 drm_dma_takedown(dev);
 272
 273         if (dev->lock.hw_lock) {
 274                 dev->sigdata.lock = dev->lock.hw_lock = NULL;   /* SHM removed */
 275                 dev->lock.file_priv = NULL;
 276                 wake_up_interruptible(&dev->lock.lock_queue);
 277         }
 278         dev->dev_mapping = NULL;
 279         mutex_unlock(&dev->struct_mutex);
 280
 281         DRM_DEBUG("lastclose completed\n");
 282         return 0;
 283 }
 284
 285 void drm_cleanup_pci(struct pci_dev *pdev)
 286 {
 287         struct drm_device *dev = pci_get_drvdata(pdev);
 288
 289         pci_set_drvdata(pdev, NULL);
 290         pci_release_regions(pdev);
 291         if (dev)
 292                 drm_cleanup(dev);
 293 }
 294 EXPORT_SYMBOL(drm_cleanup_pci);
 295
 296 /**
 297  * Module initialization. Called via init_module at module load time, or via
 298  * linux/init/main.c (this is not currently supported).
 299  *
 300  * \return zero on success or a negative number on failure.
 301  *
 302  * Initializes an array of drm_device structures, and attempts to
 303  * initialize all available devices, using consecutive minors, registering the
 304  * stubs and initializing the AGP device.
 305  *
 306  * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
 307  * after the initialization for driver customization.
 308  */
 309 int drm_init(struct drm_driver *driver,
 310                        struct pci_device_id *pciidlist)
 311 {
 312         struct pci_dev *pdev;
 313         struct pci_device_id *pid;
 314         int rc, i;
 315
 316         DRM_DEBUG("\n");
 317
 318         for (i = 0; (pciidlist[i].vendor != 0) && !drm_fb_loaded; i++) {
 319                 pid = &pciidlist[i];
 320
 321                 pdev = NULL;
 322                 /* pass back in pdev to account for multiple identical cards */
 323                 while ((pdev =
 324                         pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
 325                                        pid->subdevice, pdev))) {
 326                         /* Are there device class requirements? */
 327                         if ((pid->class != 0)
 328                                 && ((pdev->class & pid->class_mask) != pid->class)) {
 329                                 continue;
 330                         }
 331                         /* is there already a driver loaded, or (short circuit saves work) */
 332                         /* does something like VesaFB have control of the memory region? */
 333                         if (pci_dev_driver(pdev)
 334                             || pci_request_regions(pdev, "DRM scan")) {
 335                                 /* go into stealth mode */
 336                                 drm_fb_loaded = 1;
 337                                 pci_dev_put(pdev);
 338                                 break;
 339                         }
 340                         /* no fbdev or vesadev, put things back and wait for normal probe */
 341                         pci_release_regions(pdev);
 342                 }
 343         }
 344
 345         if (!drm_fb_loaded)
 346                 return pci_register_driver(&driver->pci_driver);
 347         else {
 348                 for (i = 0; pciidlist[i].vendor != 0; i++) {
 349                         pid = &pciidlist[i];
 350
 351                         pdev = NULL;
 352                         /* pass back in pdev to account for multiple identical cards */
 353                         while ((pdev =
 354                                 pci_get_subsys(pid->vendor, pid->device,
 355                                                pid->subvendor, pid->subdevice,
 356                                                pdev))) {
 357                                 /* Are there device class requirements? */
 358                                 if ((pid->class != 0)
 359                                         && ((pdev->class & pid->class_mask) != pid->class)) {
 360                                         continue;
 361                                 }
 362                                 /* stealth mode requires a manual probe */
 363                                 pci_dev_get(pdev);
 364                                 if ((rc = drm_get_dev(pdev, &pciidlist[i], driver))) {
 365                                         pci_dev_put(pdev);
 366                                         return rc;
 367                                 }
 368                         }
 369                 }
 370                 DRM_INFO("Used old pci detect: framebuffer loaded\n");
 371         }
 372         return 0;
 373 }
 374 EXPORT_SYMBOL(drm_init);
 375
 376 /**
 377  * Called via cleanup_module() at module unload time.
 378  *
 379  * Cleans up all DRM device, calling drm_lastclose().
 380  *
 381  * \sa drm_init
 382  */
 383 static void drm_cleanup(struct drm_device * dev)
 384 {
 385
 386         DRM_DEBUG("\n");
 387         if (!dev) {
 388                 DRM_ERROR("cleanup called no dev\n");
 389                 return;
 390         }
 391
 392         drm_lastclose(dev);
 393         drm_fence_manager_takedown(dev);
 394
 395         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && dev->agp
 396             && dev->agp->agp_mtrr >= 0) {
 397                 int retval;
 398                 retval = mtrr_del(dev->agp->agp_mtrr,
 399                                   dev->agp->agp_info.aper_base,
 400                                   dev->agp->agp_info.aper_size * 1024 * 1024);
 401                 DRM_DEBUG("mtrr_del=%d\n", retval);
 402         }
 403
 404         if (drm_core_has_AGP(dev) && dev->agp) {
 405                 drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
 406                 dev->agp = NULL;
 407         }
 408         if (dev->driver->unload)
 409                 dev->driver->unload(dev);
 410
 411         if (!drm_fb_loaded)
 412                 pci_disable_device(dev->pdev);
 413
 414         drm_ctxbitmap_cleanup(dev);
 415         drm_ht_remove(&dev->map_hash);
 416         drm_mm_takedown(&dev->offset_manager);
 417         drm_ht_remove(&dev->object_hash);
 418
 419         drm_put_head(&dev->primary);
 420         if (drm_put_dev(dev))
 421                 DRM_ERROR("Cannot unload module\n");
 422 }
 423
 424 void drm_exit(struct drm_driver *driver)
 425 {
 426         int i;
 427         struct drm_device *dev = NULL;
 428         struct drm_head *head;
 429
 430         DRM_DEBUG("\n");
 431         if (drm_fb_loaded) {
 432                 for (i = 0; i < drm_cards_limit; i++) {
 433                         head = drm_heads[i];
 434                         if (!head)
 435                                 continue;
 436                         if (!head->dev)
 437                                 continue;
 438                         if (head->dev->driver != driver)
 439                                 continue;
 440                         dev = head->dev;
 441                         if (dev) {
 442                                 /* release the pci driver */
 443                                 if (dev->pdev)
 444                                         pci_dev_put(dev->pdev);
 445                                 drm_cleanup(dev);
 446                         }
 447                 }
 448         } else
 449                 pci_unregister_driver(&driver->pci_driver);
 450 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15))
 451         free_nopage_retry();
 452 #endif
 453         DRM_INFO("Module unloaded\n");
 454 }
 455 EXPORT_SYMBOL(drm_exit);
 456
 457 /** File operations structure */
 458 static const struct file_operations drm_stub_fops = {
 459         .owner = THIS_MODULE,
 460         .open = drm_stub_open
 461 };
 462
 463 static int __init drm_core_init(void)
 464 {
 465         int ret;
 466         struct sysinfo si;
 467         unsigned long avail_memctl_mem;
 468         unsigned long max_memctl_mem;
 469
 470         si_meminfo(&si);
 471
 472         /*
 473          * AGP only allows low / DMA32 memory ATM.
 474          */
 475
 476         avail_memctl_mem = si.totalram - si.totalhigh;
 477
 478         /*
 479          * Avoid overflows
 480          */
 481
 482         max_memctl_mem = 1UL << (32 - PAGE_SHIFT);
 483         max_memctl_mem = (max_memctl_mem / si.mem_unit) * PAGE_SIZE;
 484
 485         if (avail_memctl_mem >= max_memctl_mem)
 486                 avail_memctl_mem = max_memctl_mem;
 487
 488         drm_init_memctl(avail_memctl_mem/2, avail_memctl_mem*3/4, si.mem_unit);
 489
 490         ret = -ENOMEM;
 491         drm_cards_limit =
 492             (drm_cards_limit < DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1);
 493         drm_heads = drm_calloc(drm_cards_limit, sizeof(*drm_heads), DRM_MEM_STUB);
 494         if (!drm_heads)
 495                 goto err_p1;
 496
 497         if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
 498                 goto err_p1;
 499
 500         drm_class = drm_sysfs_create(THIS_MODULE, "drm");
 501         if (IS_ERR(drm_class)) {
 502                 printk(KERN_ERR "DRM: Error creating drm class.\n");
 503                 ret = PTR_ERR(drm_class);
 504                 goto err_p2;
 505         }
 506
 507         drm_proc_root = proc_mkdir("dri", NULL);
 508         if (!drm_proc_root) {
 509                 DRM_ERROR("Cannot create /proc/dri\n");
 510                 ret = -1;
 511                 goto err_p3;
 512         }
 513
 514         drm_mem_init();
 515
 516         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 517                  CORE_NAME,
 518                  CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
 519         return 0;
 520 err_p3:
 521         drm_sysfs_destroy();
 522 err_p2:
 523         unregister_chrdev(DRM_MAJOR, "drm");
 524         drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
 525 err_p1:
 526         return ret;
 527 }
 528
 529 static void __exit drm_core_exit(void)
 530 {
 531         remove_proc_entry("dri", NULL);
 532         drm_sysfs_destroy();
 533
 534         unregister_chrdev(DRM_MAJOR, "drm");
 535
 536         drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB);
 537 }
 538
 539 module_init(drm_core_init);
 540 module_exit(drm_core_exit);
 541
 542 /**
 543  * Get version information
 544  *
 545  * \param inode device inode.
 546  * \param file_priv DRM file private.
 547  * \param cmd command.
 548  * \param arg user argument, pointing to a drm_version structure.
 549  * \return zero on success or negative number on failure.
 550  *
 551  * Fills in the version information in \p arg.
 552  */
 553 static int drm_version(struct drm_device *dev, void *data,
 554                        struct drm_file *file_priv)
 555 {
 556         struct drm_version *version = data;
 557         int len;
 558
 559         version->version_major = dev->driver->major;
 560         version->version_minor = dev->driver->minor;
 561         version->version_patchlevel = dev->driver->patchlevel;
 562         DRM_COPY(version->name, dev->driver->name);
 563         DRM_COPY(version->date, dev->driver->date);
 564         DRM_COPY(version->desc, dev->driver->desc);
 565
 566         return 0;
 567 }
 568
 569 /**
 570  * Called whenever a process performs an ioctl on /dev/drm.
 571  *
 572  * \param inode device inode.
 573  * \param file_priv DRM file private.
 574  * \param cmd command.
 575  * \param arg user argument.
 576  * \return zero on success or negative number on failure.
 577  *
 578  * Looks up the ioctl function in the ::ioctls table, checking for root
 579  * previleges if so required, and dispatches to the respective function.
 580  *
 581  * Copies data in and out according to the size and direction given in cmd,
 582  * which must match the ioctl cmd known by the kernel.  The kernel uses a 512
 583  * byte stack buffer to store the ioctl arguments in kernel space.  Should we
 584  * ever need much larger ioctl arguments, we may need to allocate memory.
 585  */
 586 int drm_ioctl(struct inode *inode, struct file *filp,
 587               unsigned int cmd, unsigned long arg)
 588 {
 589         return drm_unlocked_ioctl(filp, cmd, arg);
 590 }
 591 EXPORT_SYMBOL(drm_ioctl);
 592
 593 long drm_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 594 {
 595         struct drm_file *file_priv = filp->private_data;
 596         struct drm_device *dev = file_priv->head->dev;
 597         struct drm_ioctl_desc *ioctl;
 598         drm_ioctl_t *func;
 599         unsigned int nr = DRM_IOCTL_NR(cmd);
 600         int retcode = -EINVAL;
 601         char kdata[512];
 602
 603         atomic_inc(&dev->ioctl_count);
 604         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 605         ++file_priv->ioctl_count;
 606
 607         DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
 608                   current->pid, cmd, nr, (long)old_encode_dev(file_priv->head->device),
 609                   file_priv->authenticated);
 610
 611         if ((nr >= DRM_CORE_IOCTL_COUNT) &&
 612             ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
 613                 goto err_i1;
 614         if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END)
 615                 && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
 616                 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
 617         else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE))
 618                 ioctl = &drm_ioctls[nr];
 619         else {
 620                 retcode = -EINVAL;
 621                 goto err_i1;
 622         }
 623 #if 0
 624         /*
 625          * This check is disabled, because driver private ioctl->cmd
 626          * are not the ioctl commands with size and direction bits but
 627          * just the indices. The DRM core ioctl->cmd are the proper ioctl
 628          * commands. The drivers' ioctl tables need to be fixed.
 629          */
 630         if (ioctl->cmd != cmd) {
 631                 retcode = -EINVAL;
 632                 goto err_i1;
 633         }
 634 #endif
 635         func = ioctl->func;
 636         /* is there a local override? */
 637         if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
 638                 func = dev->driver->dma_ioctl;
 639
 640         if (cmd & IOC_IN) {
 641                 if (copy_from_user(kdata, (void __user *)arg,
 642                                    _IOC_SIZE(cmd)) != 0) {
 643                         retcode = -EACCES;
 644                         goto err_i1;
 645                 }
 646         }
 647
 648         if (!func) {
 649                 DRM_DEBUG("no function\n");
 650                 retcode = -EINVAL;
 651         } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
 652                    ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 653                    ((ioctl->flags & DRM_MASTER) && !file_priv->master)) {
 654                 retcode = -EACCES;
 655         } else {
 656                 retcode = func(dev, kdata, file_priv);
 657         }
 658
 659         if ((retcode == 0) && (cmd & IOC_OUT)) {
 660                 if (copy_to_user((void __user *)arg, kdata,
 661                                  _IOC_SIZE(cmd)) != 0)
 662                         retcode = -EACCES;
 663         }
 664
 665 err_i1:
 666         atomic_dec(&dev->ioctl_count);
 667         if (retcode)
 668                 DRM_DEBUG("ret = %d\n", retcode);
 669         return retcode;
 670 }
 671 EXPORT_SYMBOL(drm_unlocked_ioctl);
 672
 673 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 674 {
 675         struct drm_map_list *entry;
 676
 677         list_for_each_entry(entry, &dev->maplist, head) {
 678                 if (entry->map && entry->map->type == _DRM_SHM &&
 679                     (entry->map->flags & _DRM_CONTAINS_LOCK)) {
 680                         return entry->map;
 681                 }
 682         }
 683         return NULL;
 684 }
 685 EXPORT_SYMBOL(drm_getsarea);