sys/dev/drm/drm_drv.c

   1 /*-
   2  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
   3  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rickard E. (Rik) Faith <faith@valinux.com>
  27  *    Gareth Hughes <gareth@valinux.com>
  28  *
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 /** @file drm_drv.c
  35  * The catch-all file for DRM device support, including module setup/teardown,
  36  * open/close, and ioctl dispatch.
  37  */
  38
  39
  40 #include <sys/limits.h>
  41 #include "dev/drm/drmP.h"
  42 #include "dev/drm/drm.h"
  43 #include "dev/drm/drm_sarea.h"
  44
  45 #ifdef DRM_DEBUG_DEFAULT_ON
  46 int drm_debug_flag = 1;
  47 #else
  48 int drm_debug_flag = 0;
  49 #endif
  50
  51 static int drm_load(struct drm_device *dev);
  52 static void drm_unload(struct drm_device *dev);
  53 static drm_pci_id_list_t *drm_find_description(int vendor, int device,
  54     drm_pci_id_list_t *idlist);
  55
  56 MODULE_VERSION(drm, 1);
  57 MODULE_DEPEND(drm, agp, 1, 1, 1);
  58 MODULE_DEPEND(drm, pci, 1, 1, 1);
  59 MODULE_DEPEND(drm, mem, 1, 1, 1);
  60
  61 static drm_ioctl_desc_t           drm_ioctls[256] = {
  62         DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
  63         DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
  64         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
  65         DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
  66         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
  67         DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
  68         DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
  69         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
  70
  71         DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  72         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  73         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  74         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  75
  76         DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  77         DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
  78
  79         DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  80         DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
  81
  82         DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
  83         DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  84         DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  85         DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
  86         DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  87         DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  88         DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
  89
  90         DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  91         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  92
  93         DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
  94         DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
  95
  96         DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
  97
  98         DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  99         DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 100         DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
 101         DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
 102         DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
 103         DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma, DRM_AUTH),
 104
 105         DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 106
 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
 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         DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
 120         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_draw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 121 };
 122
 123 static struct cdevsw drm_cdevsw = {
 124         .d_version =    D_VERSION,
 125         .d_open =       drm_open,
 126         .d_read =       drm_read,
 127         .d_ioctl =      drm_ioctl,
 128         .d_poll =       drm_poll,
 129         .d_mmap =       drm_mmap,
 130         .d_name =       "drm",
 131         .d_flags =      D_TRACKCLOSE
 132 };
 133
 134 static int drm_msi = 1; /* Enable by default. */
 135 SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device");
 136 SYSCTL_INT(_hw_drm, OID_AUTO, msi, CTLFLAG_RDTUN, &drm_msi, 1,
 137     "Enable MSI interrupts for drm devices");
 138
 139 static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
 140         {0x8086, 0x2772}, /* Intel i945G        */ \
 141         {0x8086, 0x27A2}, /* Intel i945GM       */ \
 142         {0x8086, 0x27AE}, /* Intel i945GME      */ \
 143         {0, 0}
 144 };
 145
 146 static int drm_msi_is_blacklisted(int vendor, int device)
 147 {
 148         int i = 0;
 149
 150         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
 151                 if ((drm_msi_blacklist[i].vendor == vendor) &&
 152                     (drm_msi_blacklist[i].device == device)) {
 153                         return 1;
 154                 }
 155         }
 156
 157         return 0;
 158 }
 159
 160 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
 161 {
 162         drm_pci_id_list_t *id_entry;
 163         int vendor, device;
 164         vendor = pci_get_vendor(kdev);
 165         device = pci_get_device(kdev);
 166
 167         if (pci_get_class(kdev) != PCIC_DISPLAY
 168             || pci_get_subclass(kdev) != PCIS_DISPLAY_VGA)
 169                 return ENXIO;
 170
 171         id_entry = drm_find_description(vendor, device, idlist);
 172         if (id_entry != NULL) {
 173                 if (!device_get_desc(kdev)) {
 174                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 175                         device_set_desc(kdev, id_entry->name);
 176                 }
 177                 DRM_OBSOLETE(kdev);
 178                 return BUS_PROBE_GENERIC;
 179         }
 180
 181         return ENXIO;
 182 }
 183
 184 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 185 {
 186         struct drm_device *dev;
 187         drm_pci_id_list_t *id_entry;
 188         int unit, msicount;
 189
 190         unit = device_get_unit(kdev);
 191         dev = device_get_softc(kdev);
 192
 193         dev->device = kdev;
 194         dev->devnode = make_dev(&drm_cdevsw,
 195                         0,
 196                         DRM_DEV_UID,
 197                         DRM_DEV_GID,
 198                         DRM_DEV_MODE,
 199                         "dri/card%d", unit);
 200         dev->devnode->si_drv1 = dev;
 201
 202         dev->pci_domain = pci_get_domain(dev->device);
 203         dev->pci_bus = pci_get_bus(dev->device);
 204         dev->pci_slot = pci_get_slot(dev->device);
 205         dev->pci_func = pci_get_function(dev->device);
 206
 207         dev->pci_vendor = pci_get_vendor(dev->device);
 208         dev->pci_device = pci_get_device(dev->device);
 209
 210         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 211                 if (drm_msi &&
 212                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
 213                         msicount = pci_msi_count(dev->device);
 214                         DRM_DEBUG("MSI count = %d\n", msicount);
 215                         if (msicount > 1)
 216                                 msicount = 1;
 217
 218                         if (pci_alloc_msi(dev->device, &msicount) == 0) {
 219                                 DRM_INFO("MSI enabled %d message(s)\n",
 220                                     msicount);
 221                                 dev->msi_enabled = 1;
 222                                 dev->irqrid = 1;
 223                         }
 224                 }
 225
 226                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
 227                     &dev->irqrid, RF_SHAREABLE);
 228                 if (!dev->irqr) {
 229                         return ENOENT;
 230                 }
 231
 232                 dev->irq = (int) rman_get_start(dev->irqr);
 233         }
 234
 235         mtx_init(&dev->dev_lock, "drmdev", NULL, MTX_DEF);
 236         mtx_init(&dev->irq_lock, "drmirq", NULL, MTX_DEF);
 237         mtx_init(&dev->vbl_lock, "drmvbl", NULL, MTX_DEF);
 238         mtx_init(&dev->drw_lock, "drmdrw", NULL, MTX_DEF);
 239
 240         id_entry = drm_find_description(dev->pci_vendor,
 241             dev->pci_device, idlist);
 242         dev->id_entry = id_entry;
 243
 244         return drm_load(dev);
 245 }
 246
 247 int drm_detach(device_t kdev)
 248 {
 249         struct drm_device *dev;
 250
 251         dev = device_get_softc(kdev);
 252
 253         drm_unload(dev);
 254
 255         if (dev->irqr) {
 256                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 257                     dev->irqr);
 258
 259                 if (dev->msi_enabled) {
 260                         pci_release_msi(dev->device);
 261                         DRM_INFO("MSI released\n");
 262                 }
 263         }
 264
 265         return 0;
 266 }
 267
 268 #ifndef DRM_DEV_NAME
 269 #define DRM_DEV_NAME "drm"
 270 #endif
 271
 272 devclass_t drm_devclass;
 273
 274 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 275     drm_pci_id_list_t *idlist)
 276 {
 277         int i = 0;
 278
 279         for (i = 0; idlist[i].vendor != 0; i++) {
 280                 if ((idlist[i].vendor == vendor) &&
 281                     ((idlist[i].device == device) ||
 282                     (idlist[i].device == 0))) {
 283                         return &idlist[i];
 284                 }
 285         }
 286         return NULL;
 287 }
 288
 289 static int drm_firstopen(struct drm_device *dev)
 290 {
 291         drm_local_map_t *map;
 292         int i;
 293
 294         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 295
 296         /* prebuild the SAREA */
 297         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
 298             _DRM_CONTAINS_LOCK, &map);
 299         if (i != 0)
 300                 return i;
 301
 302         if (dev->driver->firstopen)
 303                 dev->driver->firstopen(dev);
 304
 305         dev->buf_use = 0;
 306
 307         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
 308                 i = drm_dma_setup(dev);
 309                 if (i != 0)
 310                         return i;
 311         }
 312
 313         for (i = 0; i < DRM_HASH_SIZE; i++) {
 314                 dev->magiclist[i].head = NULL;
 315                 dev->magiclist[i].tail = NULL;
 316         }
 317
 318         dev->lock.lock_queue = 0;
 319         dev->irq_enabled = 0;
 320         dev->context_flag = 0;
 321         dev->last_context = 0;
 322         dev->if_version = 0;
 323
 324         dev->buf_sigio = NULL;
 325
 326         DRM_DEBUG("\n");
 327
 328         return 0;
 329 }
 330
 331 static int drm_lastclose(struct drm_device *dev)
 332 {
 333         drm_magic_entry_t *pt, *next;
 334         drm_local_map_t *map, *mapsave;
 335         int i;
 336
 337         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 338
 339         DRM_DEBUG("\n");
 340
 341         if (dev->driver->lastclose != NULL)
 342                 dev->driver->lastclose(dev);
 343
 344         if (dev->irq_enabled)
 345                 drm_irq_uninstall(dev);
 346
 347         if (dev->unique) {
 348                 free(dev->unique, DRM_MEM_DRIVER);
 349                 dev->unique = NULL;
 350                 dev->unique_len = 0;
 351         }
 352         /* Clear pid list */
 353         for (i = 0; i < DRM_HASH_SIZE; i++) {
 354                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 355                         next = pt->next;
 356                         free(pt, DRM_MEM_MAGIC);
 357                 }
 358                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 359         }
 360
 361         DRM_UNLOCK();
 362         drm_drawable_free_all(dev);
 363         DRM_LOCK();
 364
 365         /* Clear AGP information */
 366         if (dev->agp) {
 367                 drm_agp_mem_t *entry;
 368                 drm_agp_mem_t *nexte;
 369
 370                 /* Remove AGP resources, but leave dev->agp intact until
 371                  * drm_unload is called.
 372                  */
 373                 for (entry = dev->agp->memory; entry; entry = nexte) {
 374                         nexte = entry->next;
 375                         if (entry->bound)
 376                                 drm_agp_unbind_memory(entry->handle);
 377                         drm_agp_free_memory(entry->handle);
 378                         free(entry, DRM_MEM_AGPLISTS);
 379                 }
 380                 dev->agp->memory = NULL;
 381
 382                 if (dev->agp->acquired)
 383                         drm_agp_release(dev);
 384
 385                 dev->agp->acquired = 0;
 386                 dev->agp->enabled  = 0;
 387         }
 388         if (dev->sg != NULL) {
 389                 drm_sg_cleanup(dev->sg);
 390                 dev->sg = NULL;
 391         }
 392
 393         TAILQ_FOREACH_SAFE(map, &dev->maplist, link, mapsave) {
 394                 if (!(map->flags & _DRM_DRIVER))
 395                         drm_rmmap(dev, map);
 396         }
 397
 398         drm_dma_takedown(dev);
 399         if (dev->lock.hw_lock) {
 400                 dev->lock.hw_lock = NULL; /* SHM removed */
 401                 dev->lock.file_priv = NULL;
 402                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 403         }
 404
 405         return 0;
 406 }
 407
 408 static int drm_load(struct drm_device *dev)
 409 {
 410         int i, retcode;
 411
 412         DRM_DEBUG("\n");
 413
 414         TAILQ_INIT(&dev->maplist);
 415         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 416         if (dev->map_unrhdr == NULL) {
 417                 DRM_ERROR("Couldn't allocate map number allocator\n");
 418                 return EINVAL;
 419         }
 420
 421
 422         drm_mem_init();
 423         drm_sysctl_init(dev);
 424         TAILQ_INIT(&dev->files);
 425
 426         dev->counters  = 6;
 427         dev->types[0]  = _DRM_STAT_LOCK;
 428         dev->types[1]  = _DRM_STAT_OPENS;
 429         dev->types[2]  = _DRM_STAT_CLOSES;
 430         dev->types[3]  = _DRM_STAT_IOCTLS;
 431         dev->types[4]  = _DRM_STAT_LOCKS;
 432         dev->types[5]  = _DRM_STAT_UNLOCKS;
 433
 434         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 435                 atomic_set(&dev->counts[i], 0);
 436
 437         if (dev->driver->load != NULL) {
 438                 DRM_LOCK();
 439                 /* Shared code returns -errno. */
 440                 retcode = -dev->driver->load(dev,
 441                     dev->id_entry->driver_private);
 442                 if (pci_enable_busmaster(dev->device))
 443                         DRM_ERROR("Request to enable bus-master failed.\n");
 444                 DRM_UNLOCK();
 445                 if (retcode != 0)
 446                         goto error;
 447         }
 448
 449         if (drm_core_has_AGP(dev)) {
 450                 if (drm_device_is_agp(dev))
 451                         dev->agp = drm_agp_init();
 452                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 453                     dev->agp == NULL) {
 454                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 455                             "AGP.\n");
 456                         retcode = ENOMEM;
 457                         goto error;
 458                 }
 459                 if (dev->agp != NULL && dev->agp->info.ai_aperture_base != 0) {
 460                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
 461                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
 462                                 dev->agp->mtrr = 1;
 463                 }
 464         }
 465
 466         retcode = drm_ctxbitmap_init(dev);
 467         if (retcode != 0) {
 468                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 469                 goto error;
 470         }
 471
 472         dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
 473         if (dev->drw_unrhdr == NULL) {
 474                 DRM_ERROR("Couldn't allocate drawable number allocator\n");
 475                 goto error;
 476         }
 477
 478         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 479             dev->driver->name,
 480             dev->driver->major,
 481             dev->driver->minor,
 482             dev->driver->patchlevel,
 483             dev->driver->date);
 484
 485         return 0;
 486
 487 error:
 488         drm_sysctl_cleanup(dev);
 489         DRM_LOCK();
 490         drm_lastclose(dev);
 491         DRM_UNLOCK();
 492         destroy_dev(dev->devnode);
 493
 494         mtx_destroy(&dev->drw_lock);
 495         mtx_destroy(&dev->vbl_lock);
 496         mtx_destroy(&dev->irq_lock);
 497         mtx_destroy(&dev->dev_lock);
 498
 499         return retcode;
 500 }
 501
 502 static void drm_unload(struct drm_device *dev)
 503 {
 504         int i;
 505
 506         DRM_DEBUG("\n");
 507
 508         drm_sysctl_cleanup(dev);
 509         destroy_dev(dev->devnode);
 510
 511         drm_ctxbitmap_cleanup(dev);
 512
 513         if (dev->agp && dev->agp->mtrr) {
 514                 int __unused retcode;
 515
 516                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
 517                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
 518                 DRM_DEBUG("mtrr_del = %d", retcode);
 519         }
 520
 521         drm_vblank_cleanup(dev);
 522
 523         DRM_LOCK();
 524         drm_lastclose(dev);
 525         DRM_UNLOCK();
 526
 527         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 528          * worried about resource consumption while the DRM is inactive (between
 529          * lastclose and firstopen or unload) because these aren't actually
 530          * taking up KVA, just keeping the PCI resource allocated.
 531          */
 532         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 533                 if (dev->pcir[i] == NULL)
 534                         continue;
 535                 bus_release_resource(dev->device, SYS_RES_MEMORY,
 536                     dev->pcirid[i], dev->pcir[i]);
 537                 dev->pcir[i] = NULL;
 538         }
 539
 540         if (dev->agp) {
 541                 free(dev->agp, DRM_MEM_AGPLISTS);
 542                 dev->agp = NULL;
 543         }
 544
 545         if (dev->driver->unload != NULL) {
 546                 DRM_LOCK();
 547                 dev->driver->unload(dev);
 548                 DRM_UNLOCK();
 549         }
 550
 551         delete_unrhdr(dev->drw_unrhdr);
 552         delete_unrhdr(dev->map_unrhdr);
 553
 554         drm_mem_uninit();
 555
 556         if (pci_disable_busmaster(dev->device))
 557                 DRM_ERROR("Request to disable bus-master failed.\n");
 558
 559         mtx_destroy(&dev->drw_lock);
 560         mtx_destroy(&dev->vbl_lock);
 561         mtx_destroy(&dev->irq_lock);
 562         mtx_destroy(&dev->dev_lock);
 563 }
 564
 565 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 566 {
 567         struct drm_version *version = data;
 568         int len;
 569
 570 #define DRM_COPY( name, value )                                         \
 571         len = strlen( value );                                          \
 572         if ( len > name##_len ) len = name##_len;                       \
 573         name##_len = strlen( value );                                   \
 574         if ( len && name ) {                                            \
 575                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 576                         return EFAULT;                          \
 577         }
 578
 579         version->version_major          = dev->driver->major;
 580         version->version_minor          = dev->driver->minor;
 581         version->version_patchlevel     = dev->driver->patchlevel;
 582
 583         DRM_COPY(version->name, dev->driver->name);
 584         DRM_COPY(version->date, dev->driver->date);
 585         DRM_COPY(version->desc, dev->driver->desc);
 586
 587         return 0;
 588 }
 589
 590 int drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
 591 {
 592         struct drm_device *dev = NULL;
 593         int retcode = 0;
 594
 595         dev = kdev->si_drv1;
 596
 597         DRM_DEBUG("open_count = %d\n", dev->open_count);
 598
 599         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
 600
 601         if (!retcode) {
 602                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 603                 DRM_LOCK();
 604                 device_busy(dev->device);
 605                 if (!dev->open_count++)
 606                         retcode = drm_firstopen(dev);
 607                 DRM_UNLOCK();
 608         }
 609
 610         return retcode;
 611 }
 612
 613 void drm_close(void *data)
 614 {
 615         struct drm_file *file_priv = data;
 616         struct drm_device *dev = file_priv->dev;
 617         int retcode = 0;
 618
 619         DRM_DEBUG("open_count = %d\n", dev->open_count);
 620
 621         DRM_LOCK();
 622
 623         if (dev->driver->preclose != NULL)
 624                 dev->driver->preclose(dev, file_priv);
 625
 626         /* ========================================================
 627          * Begin inline drm_release
 628          */
 629
 630         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 631             DRM_CURRENTPID, (long)dev->device, dev->open_count);
 632
 633         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 634             && dev->lock.file_priv == file_priv) {
 635                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 636                           DRM_CURRENTPID,
 637                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 638                 if (dev->driver->reclaim_buffers_locked != NULL)
 639                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 640
 641                 drm_lock_free(&dev->lock,
 642                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 643
 644                                 /* FIXME: may require heavy-handed reset of
 645                                    hardware at this point, possibly
 646                                    processed via a callback to the X
 647                                    server. */
 648         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 649             dev->lock.hw_lock != NULL) {
 650                 /* The lock is required to reclaim buffers */
 651                 for (;;) {
 652                         if (!dev->lock.hw_lock) {
 653                                 /* Device has been unregistered */
 654                                 retcode = EINTR;
 655                                 break;
 656                         }
 657                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 658                                 dev->lock.file_priv = file_priv;
 659                                 dev->lock.lock_time = jiffies;
 660                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 661                                 break;  /* Got lock */
 662                         }
 663                         /* Contention */
 664                         retcode = mtx_sleep((void *)&dev->lock.lock_queue,
 665                             &dev->dev_lock, PCATCH, "drmlk2", 0);
 666                         if (retcode)
 667                                 break;
 668                 }
 669                 if (retcode == 0) {
 670                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 671                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 672                 }
 673         }
 674
 675         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 676             !dev->driver->reclaim_buffers_locked)
 677                 drm_reclaim_buffers(dev, file_priv);
 678
 679         funsetown(&dev->buf_sigio);
 680
 681         if (dev->driver->postclose != NULL)
 682                 dev->driver->postclose(dev, file_priv);
 683         TAILQ_REMOVE(&dev->files, file_priv, link);
 684         free(file_priv, DRM_MEM_FILES);
 685
 686         /* ========================================================
 687          * End inline drm_release
 688          */
 689
 690         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 691         device_unbusy(dev->device);
 692         if (--dev->open_count == 0) {
 693                 retcode = drm_lastclose(dev);
 694         }
 695
 696         DRM_UNLOCK();
 697 }
 698
 699 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 700  */
 701 int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 702     DRM_STRUCTPROC *p)
 703 {
 704         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 705         int retcode = 0;
 706         drm_ioctl_desc_t *ioctl;
 707         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 708         int nr = DRM_IOCTL_NR(cmd);
 709         int is_driver_ioctl = 0;
 710         struct drm_file *file_priv;
 711
 712         retcode = devfs_get_cdevpriv((void **)&file_priv);
 713         if (retcode != 0) {
 714                 DRM_ERROR("can't find authenticator\n");
 715                 return EINVAL;
 716         }
 717
 718         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 719         ++file_priv->ioctl_count;
 720
 721         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 722             DRM_CURRENTPID, cmd, nr, (long)dev->device,
 723             file_priv->authenticated);
 724
 725         switch (cmd) {
 726         case FIONBIO:
 727         case FIOASYNC:
 728                 return 0;
 729
 730         case FIOSETOWN:
 731                 return fsetown(*(int *)data, &dev->buf_sigio);
 732
 733         case FIOGETOWN:
 734                 *(int *) data = fgetown(&dev->buf_sigio);
 735                 return 0;
 736         }
 737
 738         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 739                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 740                 return EINVAL;
 741         }
 742
 743         ioctl = &drm_ioctls[nr];
 744         /* It's not a core DRM ioctl, try driver-specific. */
 745         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 746                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 747                 nr -= DRM_COMMAND_BASE;
 748                 if (nr >= dev->driver->max_ioctl) {
 749                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 750                             nr, dev->driver->max_ioctl);
 751                         return EINVAL;
 752                 }
 753                 ioctl = &dev->driver->ioctls[nr];
 754                 is_driver_ioctl = 1;
 755         }
 756         func = ioctl->func;
 757
 758         if (func == NULL) {
 759                 DRM_DEBUG("no function\n");
 760                 return EINVAL;
 761         }
 762
 763         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 764             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 765             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 766                 return EACCES;
 767
 768         if (is_driver_ioctl) {
 769                 DRM_LOCK();
 770                 /* shared code returns -errno */
 771                 retcode = -func(dev, data, file_priv);
 772                 DRM_UNLOCK();
 773         } else {
 774                 retcode = func(dev, data, file_priv);
 775         }
 776
 777         if (retcode != 0)
 778                 DRM_DEBUG("    returning %d\n", retcode);
 779
 780         return retcode;
 781 }
 782
 783 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 784 {
 785         drm_local_map_t *map;
 786
 787         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 788         TAILQ_FOREACH(map, &dev->maplist, link) {
 789                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
 790                         return map;
 791         }
 792
 793         return NULL;
 794 }
 795
 796 #if DRM_LINUX
 797
 798 #include <sys/sysproto.h>
 799
 800 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 801
 802 #define LINUX_IOCTL_DRM_MIN             0x6400
 803 #define LINUX_IOCTL_DRM_MAX             0x64ff
 804
 805 static linux_ioctl_function_t drm_linux_ioctl;
 806 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 807     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 808
 809 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
 810     linux_ioctl_register_handler, &drm_handler);
 811 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
 812     linux_ioctl_unregister_handler, &drm_handler);
 813
 814 /* The bits for in/out are switched on Linux */
 815 #define LINUX_IOC_IN    IOC_OUT
 816 #define LINUX_IOC_OUT   IOC_IN
 817
 818 static int
 819 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 820 {
 821         int error;
 822         int cmd = args->cmd;
 823
 824         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 825         if (cmd & LINUX_IOC_IN)
 826                 args->cmd |= IOC_IN;
 827         if (cmd & LINUX_IOC_OUT)
 828                 args->cmd |= IOC_OUT;
 829
 830         error = ioctl(p, (struct ioctl_args *)args);
 831
 832         return error;
 833 }
 834 #endif /* DRM_LINUX */