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 #if __FreeBSD_version < 700010
 165         device_t realdev;
 166
 167         if (!strcmp(device_get_name(kdev), "drmsub"))
 168                 realdev = device_get_parent(kdev);
 169         else
 170                 realdev = kdev;
 171         vendor = pci_get_vendor(realdev);
 172         device = pci_get_device(realdev);
 173 #else
 174         vendor = pci_get_vendor(kdev);
 175         device = pci_get_device(kdev);
 176 #endif
 177
 178         if (pci_get_class(kdev) != PCIC_DISPLAY
 179             || pci_get_subclass(kdev) != PCIS_DISPLAY_VGA)
 180                 return ENXIO;
 181
 182         id_entry = drm_find_description(vendor, device, idlist);
 183         if (id_entry != NULL) {
 184                 if (!device_get_desc(kdev)) {
 185                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 186                         device_set_desc(kdev, id_entry->name);
 187                 }
 188                 return 0;
 189         }
 190
 191         return ENXIO;
 192 }
 193
 194 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 195 {
 196         struct drm_device *dev;
 197         drm_pci_id_list_t *id_entry;
 198         int unit, msicount;
 199
 200         unit = device_get_unit(kdev);
 201         dev = device_get_softc(kdev);
 202
 203 #if __FreeBSD_version < 700010
 204         if (!strcmp(device_get_name(kdev), "drmsub"))
 205                 dev->device = device_get_parent(kdev);
 206         else
 207                 dev->device = kdev;
 208 #else
 209         dev->device = kdev;
 210 #endif
 211         dev->devnode = make_dev(&drm_cdevsw,
 212                         0,
 213                         DRM_DEV_UID,
 214                         DRM_DEV_GID,
 215                         DRM_DEV_MODE,
 216                         "dri/card%d", unit);
 217         dev->devnode->si_drv1 = dev;
 218
 219 #if __FreeBSD_version >= 700053
 220         dev->pci_domain = pci_get_domain(dev->device);
 221 #else
 222         dev->pci_domain = 0;
 223 #endif
 224         dev->pci_bus = pci_get_bus(dev->device);
 225         dev->pci_slot = pci_get_slot(dev->device);
 226         dev->pci_func = pci_get_function(dev->device);
 227
 228         dev->pci_vendor = pci_get_vendor(dev->device);
 229         dev->pci_device = pci_get_device(dev->device);
 230
 231         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 232                 if (drm_msi &&
 233                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
 234                         msicount = pci_msi_count(dev->device);
 235                         DRM_DEBUG("MSI count = %d\n", msicount);
 236                         if (msicount > 1)
 237                                 msicount = 1;
 238
 239                         if (pci_alloc_msi(dev->device, &msicount) == 0) {
 240                                 DRM_INFO("MSI enabled %d message(s)\n",
 241                                     msicount);
 242                                 dev->msi_enabled = 1;
 243                                 dev->irqrid = 1;
 244                         }
 245                 }
 246
 247                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
 248                     &dev->irqrid, RF_SHAREABLE);
 249                 if (!dev->irqr) {
 250                         return ENOENT;
 251                 }
 252
 253                 dev->irq = (int) rman_get_start(dev->irqr);
 254         }
 255
 256         mtx_init(&dev->dev_lock, "drmdev", NULL, MTX_DEF);
 257         mtx_init(&dev->irq_lock, "drmirq", NULL, MTX_DEF);
 258         mtx_init(&dev->vbl_lock, "drmvbl", NULL, MTX_DEF);
 259         mtx_init(&dev->drw_lock, "drmdrw", NULL, MTX_DEF);
 260
 261         id_entry = drm_find_description(dev->pci_vendor,
 262             dev->pci_device, idlist);
 263         dev->id_entry = id_entry;
 264
 265         return drm_load(dev);
 266 }
 267
 268 int drm_detach(device_t kdev)
 269 {
 270         struct drm_device *dev;
 271
 272         dev = device_get_softc(kdev);
 273
 274         drm_unload(dev);
 275
 276         if (dev->irqr) {
 277                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 278                     dev->irqr);
 279
 280                 if (dev->msi_enabled) {
 281                         pci_release_msi(dev->device);
 282                         DRM_INFO("MSI released\n");
 283                 }
 284         }
 285
 286         return 0;
 287 }
 288
 289 #ifndef DRM_DEV_NAME
 290 #define DRM_DEV_NAME "drm"
 291 #endif
 292
 293 devclass_t drm_devclass;
 294
 295 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 296     drm_pci_id_list_t *idlist)
 297 {
 298         int i = 0;
 299
 300         for (i = 0; idlist[i].vendor != 0; i++) {
 301                 if ((idlist[i].vendor == vendor) &&
 302                     ((idlist[i].device == device) ||
 303                     (idlist[i].device == 0))) {
 304                         return &idlist[i];
 305                 }
 306         }
 307         return NULL;
 308 }
 309
 310 static int drm_firstopen(struct drm_device *dev)
 311 {
 312         drm_local_map_t *map;
 313         int i;
 314
 315         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 316
 317         /* prebuild the SAREA */
 318         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
 319             _DRM_CONTAINS_LOCK, &map);
 320         if (i != 0)
 321                 return i;
 322
 323         if (dev->driver->firstopen)
 324                 dev->driver->firstopen(dev);
 325
 326         dev->buf_use = 0;
 327
 328         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
 329                 i = drm_dma_setup(dev);
 330                 if (i != 0)
 331                         return i;
 332         }
 333
 334         for (i = 0; i < DRM_HASH_SIZE; i++) {
 335                 dev->magiclist[i].head = NULL;
 336                 dev->magiclist[i].tail = NULL;
 337         }
 338
 339         dev->lock.lock_queue = 0;
 340         dev->irq_enabled = 0;
 341         dev->context_flag = 0;
 342         dev->last_context = 0;
 343         dev->if_version = 0;
 344
 345         dev->buf_sigio = NULL;
 346
 347         DRM_DEBUG("\n");
 348
 349         return 0;
 350 }
 351
 352 static int drm_lastclose(struct drm_device *dev)
 353 {
 354         drm_magic_entry_t *pt, *next;
 355         drm_local_map_t *map, *mapsave;
 356         int i;
 357
 358         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 359
 360         DRM_DEBUG("\n");
 361
 362         if (dev->driver->lastclose != NULL)
 363                 dev->driver->lastclose(dev);
 364
 365         if (dev->irq_enabled)
 366                 drm_irq_uninstall(dev);
 367
 368         if (dev->unique) {
 369                 free(dev->unique, DRM_MEM_DRIVER);
 370                 dev->unique = NULL;
 371                 dev->unique_len = 0;
 372         }
 373         /* Clear pid list */
 374         for (i = 0; i < DRM_HASH_SIZE; i++) {
 375                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 376                         next = pt->next;
 377                         free(pt, DRM_MEM_MAGIC);
 378                 }
 379                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 380         }
 381
 382         DRM_UNLOCK();
 383         drm_drawable_free_all(dev);
 384         DRM_LOCK();
 385
 386         /* Clear AGP information */
 387         if (dev->agp) {
 388                 drm_agp_mem_t *entry;
 389                 drm_agp_mem_t *nexte;
 390
 391                 /* Remove AGP resources, but leave dev->agp intact until
 392                  * drm_unload is called.
 393                  */
 394                 for (entry = dev->agp->memory; entry; entry = nexte) {
 395                         nexte = entry->next;
 396                         if (entry->bound)
 397                                 drm_agp_unbind_memory(entry->handle);
 398                         drm_agp_free_memory(entry->handle);
 399                         free(entry, DRM_MEM_AGPLISTS);
 400                 }
 401                 dev->agp->memory = NULL;
 402
 403                 if (dev->agp->acquired)
 404                         drm_agp_release(dev);
 405
 406                 dev->agp->acquired = 0;
 407                 dev->agp->enabled  = 0;
 408         }
 409         if (dev->sg != NULL) {
 410                 drm_sg_cleanup(dev->sg);
 411                 dev->sg = NULL;
 412         }
 413
 414         TAILQ_FOREACH_SAFE(map, &dev->maplist, link, mapsave) {
 415                 if (!(map->flags & _DRM_DRIVER))
 416                         drm_rmmap(dev, map);
 417         }
 418
 419         drm_dma_takedown(dev);
 420         if (dev->lock.hw_lock) {
 421                 dev->lock.hw_lock = NULL; /* SHM removed */
 422                 dev->lock.file_priv = NULL;
 423                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 424         }
 425
 426         return 0;
 427 }
 428
 429 static int drm_load(struct drm_device *dev)
 430 {
 431         int i, retcode;
 432
 433         DRM_DEBUG("\n");
 434
 435         TAILQ_INIT(&dev->maplist);
 436         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 437         if (dev->map_unrhdr == NULL) {
 438                 DRM_ERROR("Couldn't allocate map number allocator\n");
 439                 return EINVAL;
 440         }
 441
 442
 443         drm_mem_init();
 444         drm_sysctl_init(dev);
 445         TAILQ_INIT(&dev->files);
 446
 447         dev->counters  = 6;
 448         dev->types[0]  = _DRM_STAT_LOCK;
 449         dev->types[1]  = _DRM_STAT_OPENS;
 450         dev->types[2]  = _DRM_STAT_CLOSES;
 451         dev->types[3]  = _DRM_STAT_IOCTLS;
 452         dev->types[4]  = _DRM_STAT_LOCKS;
 453         dev->types[5]  = _DRM_STAT_UNLOCKS;
 454
 455         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 456                 atomic_set(&dev->counts[i], 0);
 457
 458         if (dev->driver->load != NULL) {
 459                 DRM_LOCK();
 460                 /* Shared code returns -errno. */
 461                 retcode = -dev->driver->load(dev,
 462                     dev->id_entry->driver_private);
 463                 if (pci_enable_busmaster(dev->device))
 464                         DRM_ERROR("Request to enable bus-master failed.\n");
 465                 DRM_UNLOCK();
 466                 if (retcode != 0)
 467                         goto error;
 468         }
 469
 470         if (drm_core_has_AGP(dev)) {
 471                 if (drm_device_is_agp(dev))
 472                         dev->agp = drm_agp_init();
 473                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 474                     dev->agp == NULL) {
 475                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 476                             "AGP.\n");
 477                         retcode = ENOMEM;
 478                         goto error;
 479                 }
 480                 if (dev->agp != NULL && dev->agp->info.ai_aperture_base != 0) {
 481                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
 482                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
 483                                 dev->agp->mtrr = 1;
 484                 }
 485         }
 486
 487         retcode = drm_ctxbitmap_init(dev);
 488         if (retcode != 0) {
 489                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 490                 goto error;
 491         }
 492
 493         dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
 494         if (dev->drw_unrhdr == NULL) {
 495                 DRM_ERROR("Couldn't allocate drawable number allocator\n");
 496                 goto error;
 497         }
 498
 499         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 500             dev->driver->name,
 501             dev->driver->major,
 502             dev->driver->minor,
 503             dev->driver->patchlevel,
 504             dev->driver->date);
 505
 506         return 0;
 507
 508 error:
 509         drm_sysctl_cleanup(dev);
 510         DRM_LOCK();
 511         drm_lastclose(dev);
 512         DRM_UNLOCK();
 513         destroy_dev(dev->devnode);
 514
 515         mtx_destroy(&dev->drw_lock);
 516         mtx_destroy(&dev->vbl_lock);
 517         mtx_destroy(&dev->irq_lock);
 518         mtx_destroy(&dev->dev_lock);
 519
 520         return retcode;
 521 }
 522
 523 static void drm_unload(struct drm_device *dev)
 524 {
 525         int i;
 526
 527         DRM_DEBUG("\n");
 528
 529         drm_sysctl_cleanup(dev);
 530         destroy_dev(dev->devnode);
 531
 532         drm_ctxbitmap_cleanup(dev);
 533
 534         if (dev->agp && dev->agp->mtrr) {
 535                 int __unused retcode;
 536
 537                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
 538                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
 539                 DRM_DEBUG("mtrr_del = %d", retcode);
 540         }
 541
 542         drm_vblank_cleanup(dev);
 543
 544         DRM_LOCK();
 545         drm_lastclose(dev);
 546         DRM_UNLOCK();
 547
 548         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 549          * worried about resource consumption while the DRM is inactive (between
 550          * lastclose and firstopen or unload) because these aren't actually
 551          * taking up KVA, just keeping the PCI resource allocated.
 552          */
 553         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 554                 if (dev->pcir[i] == NULL)
 555                         continue;
 556                 bus_release_resource(dev->device, SYS_RES_MEMORY,
 557                     dev->pcirid[i], dev->pcir[i]);
 558                 dev->pcir[i] = NULL;
 559         }
 560
 561         if (dev->agp) {
 562                 free(dev->agp, DRM_MEM_AGPLISTS);
 563                 dev->agp = NULL;
 564         }
 565
 566         if (dev->driver->unload != NULL) {
 567                 DRM_LOCK();
 568                 dev->driver->unload(dev);
 569                 DRM_UNLOCK();
 570         }
 571
 572         delete_unrhdr(dev->drw_unrhdr);
 573         delete_unrhdr(dev->map_unrhdr);
 574
 575         drm_mem_uninit();
 576
 577         if (pci_disable_busmaster(dev->device))
 578                 DRM_ERROR("Request to disable bus-master failed.\n");
 579
 580         mtx_destroy(&dev->drw_lock);
 581         mtx_destroy(&dev->vbl_lock);
 582         mtx_destroy(&dev->irq_lock);
 583         mtx_destroy(&dev->dev_lock);
 584 }
 585
 586 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 587 {
 588         struct drm_version *version = data;
 589         int len;
 590
 591 #define DRM_COPY( name, value )                                         \
 592         len = strlen( value );                                          \
 593         if ( len > name##_len ) len = name##_len;                       \
 594         name##_len = strlen( value );                                   \
 595         if ( len && name ) {                                            \
 596                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 597                         return EFAULT;                          \
 598         }
 599
 600         version->version_major          = dev->driver->major;
 601         version->version_minor          = dev->driver->minor;
 602         version->version_patchlevel     = dev->driver->patchlevel;
 603
 604         DRM_COPY(version->name, dev->driver->name);
 605         DRM_COPY(version->date, dev->driver->date);
 606         DRM_COPY(version->desc, dev->driver->desc);
 607
 608         return 0;
 609 }
 610
 611 int drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
 612 {
 613         struct drm_device *dev = NULL;
 614         int retcode = 0;
 615
 616         dev = kdev->si_drv1;
 617
 618         DRM_DEBUG("open_count = %d\n", dev->open_count);
 619
 620         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
 621
 622         if (!retcode) {
 623                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 624                 DRM_LOCK();
 625                 device_busy(dev->device);
 626                 if (!dev->open_count++)
 627                         retcode = drm_firstopen(dev);
 628                 DRM_UNLOCK();
 629         }
 630
 631         return retcode;
 632 }
 633
 634 void drm_close(void *data)
 635 {
 636         struct drm_file *file_priv = data;
 637         struct drm_device *dev = file_priv->dev;
 638         int retcode = 0;
 639
 640         DRM_DEBUG("open_count = %d\n", dev->open_count);
 641
 642         DRM_LOCK();
 643
 644         if (dev->driver->preclose != NULL)
 645                 dev->driver->preclose(dev, file_priv);
 646
 647         /* ========================================================
 648          * Begin inline drm_release
 649          */
 650
 651         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 652             DRM_CURRENTPID, (long)dev->device, dev->open_count);
 653
 654         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 655             && dev->lock.file_priv == file_priv) {
 656                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 657                           DRM_CURRENTPID,
 658                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 659                 if (dev->driver->reclaim_buffers_locked != NULL)
 660                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 661
 662                 drm_lock_free(&dev->lock,
 663                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 664
 665                                 /* FIXME: may require heavy-handed reset of
 666                                    hardware at this point, possibly
 667                                    processed via a callback to the X
 668                                    server. */
 669         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 670             dev->lock.hw_lock != NULL) {
 671                 /* The lock is required to reclaim buffers */
 672                 for (;;) {
 673                         if (!dev->lock.hw_lock) {
 674                                 /* Device has been unregistered */
 675                                 retcode = EINTR;
 676                                 break;
 677                         }
 678                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 679                                 dev->lock.file_priv = file_priv;
 680                                 dev->lock.lock_time = jiffies;
 681                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 682                                 break;  /* Got lock */
 683                         }
 684                         /* Contention */
 685                         retcode = mtx_sleep((void *)&dev->lock.lock_queue,
 686                             &dev->dev_lock, PCATCH, "drmlk2", 0);
 687                         if (retcode)
 688                                 break;
 689                 }
 690                 if (retcode == 0) {
 691                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 692                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 693                 }
 694         }
 695
 696         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 697             !dev->driver->reclaim_buffers_locked)
 698                 drm_reclaim_buffers(dev, file_priv);
 699
 700         funsetown(&dev->buf_sigio);
 701
 702         if (dev->driver->postclose != NULL)
 703                 dev->driver->postclose(dev, file_priv);
 704         TAILQ_REMOVE(&dev->files, file_priv, link);
 705         free(file_priv, DRM_MEM_FILES);
 706
 707         /* ========================================================
 708          * End inline drm_release
 709          */
 710
 711         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 712         device_unbusy(dev->device);
 713         if (--dev->open_count == 0) {
 714                 retcode = drm_lastclose(dev);
 715         }
 716
 717         DRM_UNLOCK();
 718 }
 719
 720 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 721  */
 722 int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 723     DRM_STRUCTPROC *p)
 724 {
 725         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 726         int retcode = 0;
 727         drm_ioctl_desc_t *ioctl;
 728         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 729         int nr = DRM_IOCTL_NR(cmd);
 730         int is_driver_ioctl = 0;
 731         struct drm_file *file_priv;
 732
 733         retcode = devfs_get_cdevpriv((void **)&file_priv);
 734         if (retcode != 0) {
 735                 DRM_ERROR("can't find authenticator\n");
 736                 return EINVAL;
 737         }
 738
 739         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 740         ++file_priv->ioctl_count;
 741
 742         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 743             DRM_CURRENTPID, cmd, nr, (long)dev->device,
 744             file_priv->authenticated);
 745
 746         switch (cmd) {
 747         case FIONBIO:
 748         case FIOASYNC:
 749                 return 0;
 750
 751         case FIOSETOWN:
 752                 return fsetown(*(int *)data, &dev->buf_sigio);
 753
 754         case FIOGETOWN:
 755                 *(int *) data = fgetown(&dev->buf_sigio);
 756                 return 0;
 757         }
 758
 759         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 760                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 761                 return EINVAL;
 762         }
 763
 764         ioctl = &drm_ioctls[nr];
 765         /* It's not a core DRM ioctl, try driver-specific. */
 766         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 767                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 768                 nr -= DRM_COMMAND_BASE;
 769                 if (nr > dev->driver->max_ioctl) {
 770                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 771                             nr, dev->driver->max_ioctl);
 772                         return EINVAL;
 773                 }
 774                 ioctl = &dev->driver->ioctls[nr];
 775                 is_driver_ioctl = 1;
 776         }
 777         func = ioctl->func;
 778
 779         if (func == NULL) {
 780                 DRM_DEBUG("no function\n");
 781                 return EINVAL;
 782         }
 783
 784         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 785             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 786             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 787                 return EACCES;
 788
 789         if (is_driver_ioctl) {
 790                 DRM_LOCK();
 791                 /* shared code returns -errno */
 792                 retcode = -func(dev, data, file_priv);
 793                 DRM_UNLOCK();
 794         } else {
 795                 retcode = func(dev, data, file_priv);
 796         }
 797
 798         if (retcode != 0)
 799                 DRM_DEBUG("    returning %d\n", retcode);
 800
 801         return retcode;
 802 }
 803
 804 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 805 {
 806         drm_local_map_t *map;
 807
 808         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 809         TAILQ_FOREACH(map, &dev->maplist, link) {
 810                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
 811                         return map;
 812         }
 813
 814         return NULL;
 815 }
 816
 817 #if DRM_LINUX
 818
 819 #include <sys/sysproto.h>
 820
 821 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 822
 823 #define LINUX_IOCTL_DRM_MIN             0x6400
 824 #define LINUX_IOCTL_DRM_MAX             0x64ff
 825
 826 static linux_ioctl_function_t drm_linux_ioctl;
 827 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 828     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 829
 830 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
 831     linux_ioctl_register_handler, &drm_handler);
 832 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
 833     linux_ioctl_unregister_handler, &drm_handler);
 834
 835 /* The bits for in/out are switched on Linux */
 836 #define LINUX_IOC_IN    IOC_OUT
 837 #define LINUX_IOC_OUT   IOC_IN
 838
 839 static int
 840 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 841 {
 842         int error;
 843         int cmd = args->cmd;
 844
 845         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 846         if (cmd & LINUX_IOC_IN)
 847                 args->cmd |= IOC_IN;
 848         if (cmd & LINUX_IOC_OUT)
 849                 args->cmd |= IOC_OUT;
 850
 851         error = ioctl(p, (struct ioctl_args *)args);
 852
 853         return error;
 854 }
 855 #endif /* DRM_LINUX */