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 TUNABLE_INT("hw.drm.msi", &drm_msi);
 136 SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device");
 137 SYSCTL_INT(_hw_drm, OID_AUTO, msi, CTLFLAG_RDTUN, &drm_msi, 1,
 138     "Enable MSI interrupts for drm devices");
 139
 140 static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
 141         {0x8086, 0x2772}, /* Intel i945G        */ \
 142         {0x8086, 0x27A2}, /* Intel i945GM       */ \
 143         {0x8086, 0x27AE}, /* Intel i945GME      */ \
 144         {0, 0}
 145 };
 146
 147 static int drm_msi_is_blacklisted(int vendor, int device)
 148 {
 149         int i = 0;
 150
 151         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
 152                 if ((drm_msi_blacklist[i].vendor == vendor) &&
 153                     (drm_msi_blacklist[i].device == device)) {
 154                         return 1;
 155                 }
 156         }
 157
 158         return 0;
 159 }
 160
 161 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
 162 {
 163         drm_pci_id_list_t *id_entry;
 164         int vendor, device;
 165 #if __FreeBSD_version < 700010
 166         device_t realdev;
 167
 168         if (!strcmp(device_get_name(kdev), "drmsub"))
 169                 realdev = device_get_parent(kdev);
 170         else
 171                 realdev = kdev;
 172         vendor = pci_get_vendor(realdev);
 173         device = pci_get_device(realdev);
 174 #else
 175         vendor = pci_get_vendor(kdev);
 176         device = pci_get_device(kdev);
 177 #endif
 178
 179         if (pci_get_class(kdev) != PCIC_DISPLAY
 180             || pci_get_subclass(kdev) != PCIS_DISPLAY_VGA)
 181                 return ENXIO;
 182
 183         id_entry = drm_find_description(vendor, device, idlist);
 184         if (id_entry != NULL) {
 185                 if (!device_get_desc(kdev)) {
 186                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 187                         device_set_desc(kdev, id_entry->name);
 188                 }
 189                 return 0;
 190         }
 191
 192         return ENXIO;
 193 }
 194
 195 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 196 {
 197         struct drm_device *dev;
 198         drm_pci_id_list_t *id_entry;
 199         int unit, msicount;
 200
 201         unit = device_get_unit(kdev);
 202         dev = device_get_softc(kdev);
 203
 204 #if __FreeBSD_version < 700010
 205         if (!strcmp(device_get_name(kdev), "drmsub"))
 206                 dev->device = device_get_parent(kdev);
 207         else
 208                 dev->device = kdev;
 209 #else
 210         dev->device = kdev;
 211 #endif
 212         dev->devnode = make_dev(&drm_cdevsw,
 213                         0,
 214                         DRM_DEV_UID,
 215                         DRM_DEV_GID,
 216                         DRM_DEV_MODE,
 217                         "dri/card%d", unit);
 218         dev->devnode->si_drv1 = dev;
 219
 220 #if __FreeBSD_version >= 700053
 221         dev->pci_domain = pci_get_domain(dev->device);
 222 #else
 223         dev->pci_domain = 0;
 224 #endif
 225         dev->pci_bus = pci_get_bus(dev->device);
 226         dev->pci_slot = pci_get_slot(dev->device);
 227         dev->pci_func = pci_get_function(dev->device);
 228
 229         dev->pci_vendor = pci_get_vendor(dev->device);
 230         dev->pci_device = pci_get_device(dev->device);
 231
 232         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 233                 if (drm_msi &&
 234                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
 235                         msicount = pci_msi_count(dev->device);
 236                         DRM_DEBUG("MSI count = %d\n", msicount);
 237                         if (msicount > 1)
 238                                 msicount = 1;
 239
 240                         if (pci_alloc_msi(dev->device, &msicount) == 0) {
 241                                 DRM_INFO("MSI enabled %d message(s)\n",
 242                                     msicount);
 243                                 dev->msi_enabled = 1;
 244                                 dev->irqrid = 1;
 245                         }
 246                 }
 247
 248                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
 249                     &dev->irqrid, RF_SHAREABLE);
 250                 if (!dev->irqr) {
 251                         return ENOENT;
 252                 }
 253
 254                 dev->irq = (int) rman_get_start(dev->irqr);
 255         }
 256
 257         mtx_init(&dev->dev_lock, "drmdev", NULL, MTX_DEF);
 258         mtx_init(&dev->irq_lock, "drmirq", NULL, MTX_DEF);
 259         mtx_init(&dev->vbl_lock, "drmvbl", NULL, MTX_DEF);
 260         mtx_init(&dev->drw_lock, "drmdrw", NULL, MTX_DEF);
 261
 262         id_entry = drm_find_description(dev->pci_vendor,
 263             dev->pci_device, idlist);
 264         dev->id_entry = id_entry;
 265
 266         return drm_load(dev);
 267 }
 268
 269 int drm_detach(device_t kdev)
 270 {
 271         struct drm_device *dev;
 272
 273         dev = device_get_softc(kdev);
 274
 275         drm_unload(dev);
 276
 277         if (dev->irqr) {
 278                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 279                     dev->irqr);
 280
 281                 if (dev->msi_enabled) {
 282                         pci_release_msi(dev->device);
 283                         DRM_INFO("MSI released\n");
 284                 }
 285         }
 286
 287         return 0;
 288 }
 289
 290 #ifndef DRM_DEV_NAME
 291 #define DRM_DEV_NAME "drm"
 292 #endif
 293
 294 devclass_t drm_devclass;
 295
 296 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 297     drm_pci_id_list_t *idlist)
 298 {
 299         int i = 0;
 300
 301         for (i = 0; idlist[i].vendor != 0; i++) {
 302                 if ((idlist[i].vendor == vendor) &&
 303                     ((idlist[i].device == device) ||
 304                     (idlist[i].device == 0))) {
 305                         return &idlist[i];
 306                 }
 307         }
 308         return NULL;
 309 }
 310
 311 static int drm_firstopen(struct drm_device *dev)
 312 {
 313         drm_local_map_t *map;
 314         int i;
 315
 316         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 317
 318         /* prebuild the SAREA */
 319         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
 320             _DRM_CONTAINS_LOCK, &map);
 321         if (i != 0)
 322                 return i;
 323
 324         if (dev->driver->firstopen)
 325                 dev->driver->firstopen(dev);
 326
 327         dev->buf_use = 0;
 328
 329         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
 330                 i = drm_dma_setup(dev);
 331                 if (i != 0)
 332                         return i;
 333         }
 334
 335         for (i = 0; i < DRM_HASH_SIZE; i++) {
 336                 dev->magiclist[i].head = NULL;
 337                 dev->magiclist[i].tail = NULL;
 338         }
 339
 340         dev->lock.lock_queue = 0;
 341         dev->irq_enabled = 0;
 342         dev->context_flag = 0;
 343         dev->last_context = 0;
 344         dev->if_version = 0;
 345
 346         dev->buf_sigio = NULL;
 347
 348         DRM_DEBUG("\n");
 349
 350         return 0;
 351 }
 352
 353 static int drm_lastclose(struct drm_device *dev)
 354 {
 355         drm_magic_entry_t *pt, *next;
 356         drm_local_map_t *map, *mapsave;
 357         int i;
 358
 359         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 360
 361         DRM_DEBUG("\n");
 362
 363         if (dev->driver->lastclose != NULL)
 364                 dev->driver->lastclose(dev);
 365
 366         if (dev->irq_enabled)
 367                 drm_irq_uninstall(dev);
 368
 369         if (dev->unique) {
 370                 free(dev->unique, DRM_MEM_DRIVER);
 371                 dev->unique = NULL;
 372                 dev->unique_len = 0;
 373         }
 374         /* Clear pid list */
 375         for (i = 0; i < DRM_HASH_SIZE; i++) {
 376                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 377                         next = pt->next;
 378                         free(pt, DRM_MEM_MAGIC);
 379                 }
 380                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 381         }
 382
 383         DRM_UNLOCK();
 384         drm_drawable_free_all(dev);
 385         DRM_LOCK();
 386
 387         /* Clear AGP information */
 388         if (dev->agp) {
 389                 drm_agp_mem_t *entry;
 390                 drm_agp_mem_t *nexte;
 391
 392                 /* Remove AGP resources, but leave dev->agp intact until
 393                  * drm_unload is called.
 394                  */
 395                 for (entry = dev->agp->memory; entry; entry = nexte) {
 396                         nexte = entry->next;
 397                         if (entry->bound)
 398                                 drm_agp_unbind_memory(entry->handle);
 399                         drm_agp_free_memory(entry->handle);
 400                         free(entry, DRM_MEM_AGPLISTS);
 401                 }
 402                 dev->agp->memory = NULL;
 403
 404                 if (dev->agp->acquired)
 405                         drm_agp_release(dev);
 406
 407                 dev->agp->acquired = 0;
 408                 dev->agp->enabled  = 0;
 409         }
 410         if (dev->sg != NULL) {
 411                 drm_sg_cleanup(dev->sg);
 412                 dev->sg = NULL;
 413         }
 414
 415         TAILQ_FOREACH_SAFE(map, &dev->maplist, link, mapsave) {
 416                 if (!(map->flags & _DRM_DRIVER))
 417                         drm_rmmap(dev, map);
 418         }
 419
 420         drm_dma_takedown(dev);
 421         if (dev->lock.hw_lock) {
 422                 dev->lock.hw_lock = NULL; /* SHM removed */
 423                 dev->lock.file_priv = NULL;
 424                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 425         }
 426
 427         return 0;
 428 }
 429
 430 static int drm_load(struct drm_device *dev)
 431 {
 432         int i, retcode;
 433
 434         DRM_DEBUG("\n");
 435
 436         TAILQ_INIT(&dev->maplist);
 437         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 438         if (dev->map_unrhdr == NULL) {
 439                 DRM_ERROR("Couldn't allocate map number allocator\n");
 440                 return EINVAL;
 441         }
 442
 443
 444         drm_mem_init();
 445         drm_sysctl_init(dev);
 446         TAILQ_INIT(&dev->files);
 447
 448         dev->counters  = 6;
 449         dev->types[0]  = _DRM_STAT_LOCK;
 450         dev->types[1]  = _DRM_STAT_OPENS;
 451         dev->types[2]  = _DRM_STAT_CLOSES;
 452         dev->types[3]  = _DRM_STAT_IOCTLS;
 453         dev->types[4]  = _DRM_STAT_LOCKS;
 454         dev->types[5]  = _DRM_STAT_UNLOCKS;
 455
 456         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 457                 atomic_set(&dev->counts[i], 0);
 458
 459         if (dev->driver->load != NULL) {
 460                 DRM_LOCK();
 461                 /* Shared code returns -errno. */
 462                 retcode = -dev->driver->load(dev,
 463                     dev->id_entry->driver_private);
 464                 if (pci_enable_busmaster(dev->device))
 465                         DRM_ERROR("Request to enable bus-master failed.\n");
 466                 DRM_UNLOCK();
 467                 if (retcode != 0)
 468                         goto error;
 469         }
 470
 471         if (drm_core_has_AGP(dev)) {
 472                 if (drm_device_is_agp(dev))
 473                         dev->agp = drm_agp_init();
 474                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 475                     dev->agp == NULL) {
 476                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 477                             "AGP.\n");
 478                         retcode = ENOMEM;
 479                         goto error;
 480                 }
 481                 if (dev->agp != NULL && dev->agp->info.ai_aperture_base != 0) {
 482                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
 483                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
 484                                 dev->agp->mtrr = 1;
 485                 }
 486         }
 487
 488         retcode = drm_ctxbitmap_init(dev);
 489         if (retcode != 0) {
 490                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 491                 goto error;
 492         }
 493
 494         dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
 495         if (dev->drw_unrhdr == NULL) {
 496                 DRM_ERROR("Couldn't allocate drawable number allocator\n");
 497                 goto error;
 498         }
 499
 500         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 501             dev->driver->name,
 502             dev->driver->major,
 503             dev->driver->minor,
 504             dev->driver->patchlevel,
 505             dev->driver->date);
 506
 507         return 0;
 508
 509 error:
 510         drm_sysctl_cleanup(dev);
 511         DRM_LOCK();
 512         drm_lastclose(dev);
 513         DRM_UNLOCK();
 514         destroy_dev(dev->devnode);
 515
 516         mtx_destroy(&dev->drw_lock);
 517         mtx_destroy(&dev->vbl_lock);
 518         mtx_destroy(&dev->irq_lock);
 519         mtx_destroy(&dev->dev_lock);
 520
 521         return retcode;
 522 }
 523
 524 static void drm_unload(struct drm_device *dev)
 525 {
 526         int i;
 527
 528         DRM_DEBUG("\n");
 529
 530         drm_sysctl_cleanup(dev);
 531         destroy_dev(dev->devnode);
 532
 533         drm_ctxbitmap_cleanup(dev);
 534
 535         if (dev->agp && dev->agp->mtrr) {
 536                 int __unused retcode;
 537
 538                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
 539                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
 540                 DRM_DEBUG("mtrr_del = %d", retcode);
 541         }
 542
 543         drm_vblank_cleanup(dev);
 544
 545         DRM_LOCK();
 546         drm_lastclose(dev);
 547         DRM_UNLOCK();
 548
 549         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 550          * worried about resource consumption while the DRM is inactive (between
 551          * lastclose and firstopen or unload) because these aren't actually
 552          * taking up KVA, just keeping the PCI resource allocated.
 553          */
 554         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 555                 if (dev->pcir[i] == NULL)
 556                         continue;
 557                 bus_release_resource(dev->device, SYS_RES_MEMORY,
 558                     dev->pcirid[i], dev->pcir[i]);
 559                 dev->pcir[i] = NULL;
 560         }
 561
 562         if (dev->agp) {
 563                 free(dev->agp, DRM_MEM_AGPLISTS);
 564                 dev->agp = NULL;
 565         }
 566
 567         if (dev->driver->unload != NULL) {
 568                 DRM_LOCK();
 569                 dev->driver->unload(dev);
 570                 DRM_UNLOCK();
 571         }
 572
 573         delete_unrhdr(dev->drw_unrhdr);
 574         delete_unrhdr(dev->map_unrhdr);
 575
 576         drm_mem_uninit();
 577
 578         if (pci_disable_busmaster(dev->device))
 579                 DRM_ERROR("Request to disable bus-master failed.\n");
 580
 581         mtx_destroy(&dev->drw_lock);
 582         mtx_destroy(&dev->vbl_lock);
 583         mtx_destroy(&dev->irq_lock);
 584         mtx_destroy(&dev->dev_lock);
 585 }
 586
 587 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 588 {
 589         struct drm_version *version = data;
 590         int len;
 591
 592 #define DRM_COPY( name, value )                                         \
 593         len = strlen( value );                                          \
 594         if ( len > name##_len ) len = name##_len;                       \
 595         name##_len = strlen( value );                                   \
 596         if ( len && name ) {                                            \
 597                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 598                         return EFAULT;                          \
 599         }
 600
 601         version->version_major          = dev->driver->major;
 602         version->version_minor          = dev->driver->minor;
 603         version->version_patchlevel     = dev->driver->patchlevel;
 604
 605         DRM_COPY(version->name, dev->driver->name);
 606         DRM_COPY(version->date, dev->driver->date);
 607         DRM_COPY(version->desc, dev->driver->desc);
 608
 609         return 0;
 610 }
 611
 612 int drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
 613 {
 614         struct drm_device *dev = NULL;
 615         int retcode = 0;
 616
 617         dev = kdev->si_drv1;
 618
 619         DRM_DEBUG("open_count = %d\n", dev->open_count);
 620
 621         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
 622
 623         if (!retcode) {
 624                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 625                 DRM_LOCK();
 626                 device_busy(dev->device);
 627                 if (!dev->open_count++)
 628                         retcode = drm_firstopen(dev);
 629                 DRM_UNLOCK();
 630         }
 631
 632         return retcode;
 633 }
 634
 635 void drm_close(void *data)
 636 {
 637         struct drm_file *file_priv = data;
 638         struct drm_device *dev = file_priv->dev;
 639         int retcode = 0;
 640
 641         DRM_DEBUG("open_count = %d\n", dev->open_count);
 642
 643         DRM_LOCK();
 644
 645         if (dev->driver->preclose != NULL)
 646                 dev->driver->preclose(dev, file_priv);
 647
 648         /* ========================================================
 649          * Begin inline drm_release
 650          */
 651
 652         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 653             DRM_CURRENTPID, (long)dev->device, dev->open_count);
 654
 655         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 656             && dev->lock.file_priv == file_priv) {
 657                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 658                           DRM_CURRENTPID,
 659                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 660                 if (dev->driver->reclaim_buffers_locked != NULL)
 661                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 662
 663                 drm_lock_free(&dev->lock,
 664                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 665
 666                                 /* FIXME: may require heavy-handed reset of
 667                                    hardware at this point, possibly
 668                                    processed via a callback to the X
 669                                    server. */
 670         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 671             dev->lock.hw_lock != NULL) {
 672                 /* The lock is required to reclaim buffers */
 673                 for (;;) {
 674                         if (!dev->lock.hw_lock) {
 675                                 /* Device has been unregistered */
 676                                 retcode = EINTR;
 677                                 break;
 678                         }
 679                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 680                                 dev->lock.file_priv = file_priv;
 681                                 dev->lock.lock_time = jiffies;
 682                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 683                                 break;  /* Got lock */
 684                         }
 685                         /* Contention */
 686                         retcode = mtx_sleep((void *)&dev->lock.lock_queue,
 687                             &dev->dev_lock, PCATCH, "drmlk2", 0);
 688                         if (retcode)
 689                                 break;
 690                 }
 691                 if (retcode == 0) {
 692                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 693                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 694                 }
 695         }
 696
 697         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 698             !dev->driver->reclaim_buffers_locked)
 699                 drm_reclaim_buffers(dev, file_priv);
 700
 701         funsetown(&dev->buf_sigio);
 702
 703         if (dev->driver->postclose != NULL)
 704                 dev->driver->postclose(dev, file_priv);
 705         TAILQ_REMOVE(&dev->files, file_priv, link);
 706         free(file_priv, DRM_MEM_FILES);
 707
 708         /* ========================================================
 709          * End inline drm_release
 710          */
 711
 712         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 713         device_unbusy(dev->device);
 714         if (--dev->open_count == 0) {
 715                 retcode = drm_lastclose(dev);
 716         }
 717
 718         DRM_UNLOCK();
 719 }
 720
 721 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 722  */
 723 int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 724     DRM_STRUCTPROC *p)
 725 {
 726         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 727         int retcode = 0;
 728         drm_ioctl_desc_t *ioctl;
 729         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 730         int nr = DRM_IOCTL_NR(cmd);
 731         int is_driver_ioctl = 0;
 732         struct drm_file *file_priv;
 733
 734         retcode = devfs_get_cdevpriv((void **)&file_priv);
 735         if (retcode != 0) {
 736                 DRM_ERROR("can't find authenticator\n");
 737                 return EINVAL;
 738         }
 739
 740         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 741         ++file_priv->ioctl_count;
 742
 743         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 744             DRM_CURRENTPID, cmd, nr, (long)dev->device,
 745             file_priv->authenticated);
 746
 747         switch (cmd) {
 748         case FIONBIO:
 749         case FIOASYNC:
 750                 return 0;
 751
 752         case FIOSETOWN:
 753                 return fsetown(*(int *)data, &dev->buf_sigio);
 754
 755         case FIOGETOWN:
 756                 *(int *) data = fgetown(&dev->buf_sigio);
 757                 return 0;
 758         }
 759
 760         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 761                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 762                 return EINVAL;
 763         }
 764
 765         ioctl = &drm_ioctls[nr];
 766         /* It's not a core DRM ioctl, try driver-specific. */
 767         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 768                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 769                 nr -= DRM_COMMAND_BASE;
 770                 if (nr > dev->driver->max_ioctl) {
 771                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 772                             nr, dev->driver->max_ioctl);
 773                         return EINVAL;
 774                 }
 775                 ioctl = &dev->driver->ioctls[nr];
 776                 is_driver_ioctl = 1;
 777         }
 778         func = ioctl->func;
 779
 780         if (func == NULL) {
 781                 DRM_DEBUG("no function\n");
 782                 return EINVAL;
 783         }
 784
 785         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 786             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 787             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 788                 return EACCES;
 789
 790         if (is_driver_ioctl) {
 791                 DRM_LOCK();
 792                 /* shared code returns -errno */
 793                 retcode = -func(dev, data, file_priv);
 794                 DRM_UNLOCK();
 795         } else {
 796                 retcode = func(dev, data, file_priv);
 797         }
 798
 799         if (retcode != 0)
 800                 DRM_DEBUG("    returning %d\n", retcode);
 801
 802         return retcode;
 803 }
 804
 805 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 806 {
 807         drm_local_map_t *map;
 808
 809         DRM_SPINLOCK_ASSERT(&dev->dev_lock);
 810         TAILQ_FOREACH(map, &dev->maplist, link) {
 811                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
 812                         return map;
 813         }
 814
 815         return NULL;
 816 }
 817
 818 #if DRM_LINUX
 819
 820 #include <sys/sysproto.h>
 821
 822 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 823
 824 #define LINUX_IOCTL_DRM_MIN             0x6400
 825 #define LINUX_IOCTL_DRM_MAX             0x64ff
 826
 827 static linux_ioctl_function_t drm_linux_ioctl;
 828 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 829     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 830
 831 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
 832     linux_ioctl_register_handler, &drm_handler);
 833 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
 834     linux_ioctl_unregister_handler, &drm_handler);
 835
 836 /* The bits for in/out are switched on Linux */
 837 #define LINUX_IOC_IN    IOC_OUT
 838 #define LINUX_IOC_OUT   IOC_IN
 839
 840 static int
 841 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 842 {
 843         int error;
 844         int cmd = args->cmd;
 845
 846         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 847         if (cmd & LINUX_IOC_IN)
 848                 args->cmd |= IOC_IN;
 849         if (cmd & LINUX_IOC_OUT)
 850                 args->cmd |= IOC_OUT;
 851
 852         error = ioctl(p, (struct ioctl_args *)args);
 853
 854         return error;
 855 }
 856 #endif /* DRM_LINUX */