sys/dev/drm2/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 #include <sys/limits.h>
  40 #include <sys/sysent.h>
  41 #include <dev/drm2/drmP.h>
  42 #include <dev/drm2/drm.h>
  43 #include <dev/drm2/drm_sarea.h>
  44 #include <dev/drm2/drm_mode.h>
  45
  46 #ifdef DRM_DEBUG_DEFAULT_ON
  47 int drm_debug_flag = (DRM_DEBUGBITS_DEBUG | DRM_DEBUGBITS_KMS |
  48     DRM_DEBUGBITS_FAILED_IOCTL);
  49 #else
  50 int drm_debug_flag = 0;
  51 #endif
  52 int drm_notyet_flag = 0;
  53
  54 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  55 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  56
  57 static int drm_load(struct drm_device *dev);
  58 static void drm_unload(struct drm_device *dev);
  59 static drm_pci_id_list_t *drm_find_description(int vendor, int device,
  60     drm_pci_id_list_t *idlist);
  61
  62 static int
  63 drm_modevent(module_t mod, int type, void *data)
  64 {
  65
  66         switch (type) {
  67         case MOD_LOAD:
  68                 TUNABLE_INT_FETCH("drm.debug", &drm_debug_flag);
  69                 TUNABLE_INT_FETCH("drm.notyet", &drm_notyet_flag);
  70                 break;
  71         }
  72         return (0);
  73 }
  74
  75 static moduledata_t drm_mod = {
  76         "drmn",
  77         drm_modevent,
  78         0
  79 };
  80 DECLARE_MODULE(drmn, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
  81 MODULE_VERSION(drmn, 1);
  82 MODULE_DEPEND(drmn, agp, 1, 1, 1);
  83 MODULE_DEPEND(drmn, pci, 1, 1, 1);
  84 MODULE_DEPEND(drmn, mem, 1, 1, 1);
  85 MODULE_DEPEND(drmn, iicbus, 1, 1, 1);
  86
  87 static drm_ioctl_desc_t           drm_ioctls[256] = {
  88         DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
  89         DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
  90         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
  91         DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
  92         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
  93         DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
  94         DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
  95         DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED),
  96         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
  97
  98         DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  99         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 100         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 101         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 102
 103         DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 104         DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
 105
 106         DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 107         DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
 108
 109         DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
 110         DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
 111
 112         DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
 113         DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 114         DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 115         DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
 116         DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 117         DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 118         DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
 119
 120         DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 121         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 122
 123         DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
 124         DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
 125
 126         DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
 127
 128         DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 129         DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 130         DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
 131         DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
 132         DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
 133         DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma, DRM_AUTH),
 134
 135         DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 136
 137         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 138         DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 139         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 140         DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
 141         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 142         DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 143         DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 144         DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 145
 146         DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 147         DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 148         DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
 149         DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
 150         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_draw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 151
 152         DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
 153         DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
 154         DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
 155
 156         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 157         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 158         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 159         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 160         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 161         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 162         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 163         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER|DRM_UNLOCKED),
 164         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
 165         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 166         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 167         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 168         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 169         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 170         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 171         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 172         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 173         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 174         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 175         DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 176         DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 177         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 178         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 179         DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 180         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 181 };
 182
 183 static struct cdevsw drm_cdevsw = {
 184         .d_version =    D_VERSION,
 185         .d_open =       drm_open,
 186         .d_read =       drm_read,
 187         .d_ioctl =      drm_ioctl,
 188         .d_poll =       drm_poll,
 189         .d_mmap =       drm_mmap,
 190         .d_mmap_single = drm_gem_mmap_single,
 191         .d_name =       "drm",
 192         .d_flags =      D_TRACKCLOSE
 193 };
 194
 195 static int drm_msi = 1; /* Enable by default. */
 196 TUNABLE_INT("hw.drm.msi", &drm_msi);
 197 SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device");
 198 SYSCTL_INT(_hw_drm, OID_AUTO, msi, CTLFLAG_RDTUN, &drm_msi, 1,
 199     "Enable MSI interrupts for drm devices");
 200
 201 static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
 202         {0x8086, 0x2772}, /* Intel i945G        */ \
 203         {0x8086, 0x27A2}, /* Intel i945GM       */ \
 204         {0x8086, 0x27AE}, /* Intel i945GME      */ \
 205         {0, 0}
 206 };
 207
 208 static int drm_msi_is_blacklisted(int vendor, int device)
 209 {
 210         int i = 0;
 211
 212         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
 213                 if ((drm_msi_blacklist[i].vendor == vendor) &&
 214                     (drm_msi_blacklist[i].device == device)) {
 215                         return 1;
 216                 }
 217         }
 218
 219         return 0;
 220 }
 221
 222 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
 223 {
 224         drm_pci_id_list_t *id_entry;
 225         int vendor, device;
 226
 227         vendor = pci_get_vendor(kdev);
 228         device = pci_get_device(kdev);
 229
 230         if (pci_get_class(kdev) != PCIC_DISPLAY
 231             || pci_get_subclass(kdev) != PCIS_DISPLAY_VGA)
 232                 return ENXIO;
 233
 234         id_entry = drm_find_description(vendor, device, idlist);
 235         if (id_entry != NULL) {
 236                 if (!device_get_desc(kdev)) {
 237                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 238                         device_set_desc(kdev, id_entry->name);
 239                 }
 240                 return 0;
 241         }
 242
 243         return ENXIO;
 244 }
 245
 246 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 247 {
 248         struct drm_device *dev;
 249         drm_pci_id_list_t *id_entry;
 250         int error, msicount;
 251
 252         dev = device_get_softc(kdev);
 253
 254         dev->device = kdev;
 255
 256         dev->pci_domain = pci_get_domain(dev->device);
 257         dev->pci_bus = pci_get_bus(dev->device);
 258         dev->pci_slot = pci_get_slot(dev->device);
 259         dev->pci_func = pci_get_function(dev->device);
 260
 261         dev->pci_vendor = pci_get_vendor(dev->device);
 262         dev->pci_device = pci_get_device(dev->device);
 263
 264         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 265                 if (drm_msi &&
 266                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
 267                         msicount = pci_msi_count(dev->device);
 268                         DRM_DEBUG("MSI count = %d\n", msicount);
 269                         if (msicount > 1)
 270                                 msicount = 1;
 271
 272                         if (pci_alloc_msi(dev->device, &msicount) == 0) {
 273                                 DRM_INFO("MSI enabled %d message(s)\n",
 274                                     msicount);
 275                                 dev->msi_enabled = 1;
 276                                 dev->irqrid = 1;
 277                         }
 278                 }
 279
 280                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
 281                     &dev->irqrid, RF_SHAREABLE);
 282                 if (!dev->irqr) {
 283                         return (ENOENT);
 284                 }
 285
 286                 dev->irq = (int) rman_get_start(dev->irqr);
 287         }
 288
 289         mtx_init(&dev->dev_lock, "drmdev", NULL, MTX_DEF);
 290         mtx_init(&dev->irq_lock, "drmirq", NULL, MTX_DEF);
 291         mtx_init(&dev->vbl_lock, "drmvbl", NULL, MTX_DEF);
 292         mtx_init(&dev->drw_lock, "drmdrw", NULL, MTX_DEF);
 293         mtx_init(&dev->event_lock, "drmev", NULL, MTX_DEF);
 294         sx_init(&dev->dev_struct_lock, "drmslk");
 295
 296         id_entry = drm_find_description(dev->pci_vendor,
 297             dev->pci_device, idlist);
 298         dev->id_entry = id_entry;
 299
 300         error = drm_load(dev);
 301         if (error == 0)
 302                 error = drm_create_cdevs(kdev);
 303         return (error);
 304 }
 305
 306 int
 307 drm_create_cdevs(device_t kdev)
 308 {
 309         struct drm_device *dev;
 310         int error, unit;
 311
 312         unit = device_get_unit(kdev);
 313         dev = device_get_softc(kdev);
 314
 315         error = make_dev_p(MAKEDEV_WAITOK | MAKEDEV_CHECKNAME, &dev->devnode,
 316             &drm_cdevsw, 0, DRM_DEV_UID, DRM_DEV_GID,
 317             DRM_DEV_MODE, "dri/card%d", unit);
 318         if (error == 0)
 319                 dev->devnode->si_drv1 = dev;
 320         return (error);
 321 }
 322
 323 int drm_detach(device_t kdev)
 324 {
 325         struct drm_device *dev;
 326
 327         dev = device_get_softc(kdev);
 328         drm_unload(dev);
 329         if (dev->irqr) {
 330                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 331                     dev->irqr);
 332                 if (dev->msi_enabled) {
 333                         pci_release_msi(dev->device);
 334                         DRM_INFO("MSI released\n");
 335                 }
 336         }
 337         return (0);
 338 }
 339
 340 #ifndef DRM_DEV_NAME
 341 #define DRM_DEV_NAME "drm"
 342 #endif
 343
 344 devclass_t drm_devclass;
 345
 346 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 347     drm_pci_id_list_t *idlist)
 348 {
 349         int i = 0;
 350
 351         for (i = 0; idlist[i].vendor != 0; i++) {
 352                 if ((idlist[i].vendor == vendor) &&
 353                     ((idlist[i].device == device) ||
 354                     (idlist[i].device == 0))) {
 355                         return &idlist[i];
 356                 }
 357         }
 358         return NULL;
 359 }
 360
 361 static int drm_firstopen(struct drm_device *dev)
 362 {
 363         drm_local_map_t *map;
 364         int i;
 365
 366         DRM_LOCK_ASSERT(dev);
 367
 368         /* prebuild the SAREA */
 369         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
 370             _DRM_CONTAINS_LOCK, &map);
 371         if (i != 0)
 372                 return i;
 373
 374         if (dev->driver->firstopen)
 375                 dev->driver->firstopen(dev);
 376
 377         dev->buf_use = 0;
 378
 379         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
 380                 i = drm_dma_setup(dev);
 381                 if (i != 0)
 382                         return i;
 383         }
 384
 385         for (i = 0; i < DRM_HASH_SIZE; i++) {
 386                 dev->magiclist[i].head = NULL;
 387                 dev->magiclist[i].tail = NULL;
 388         }
 389
 390         dev->lock.lock_queue = 0;
 391         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 392                 dev->irq_enabled = 0;
 393         dev->context_flag = 0;
 394         dev->last_context = 0;
 395         dev->if_version = 0;
 396
 397         dev->buf_sigio = NULL;
 398
 399         DRM_DEBUG("\n");
 400
 401         return 0;
 402 }
 403
 404 static int drm_lastclose(struct drm_device *dev)
 405 {
 406         drm_magic_entry_t *pt, *next;
 407         drm_local_map_t *map, *mapsave;
 408         int i;
 409
 410         DRM_LOCK_ASSERT(dev);
 411
 412         DRM_DEBUG("\n");
 413
 414         if (dev->driver->lastclose != NULL)
 415                 dev->driver->lastclose(dev);
 416
 417         if (!drm_core_check_feature(dev, DRIVER_MODESET) && dev->irq_enabled)
 418                 drm_irq_uninstall(dev);
 419
 420         if (dev->unique) {
 421                 free(dev->unique, DRM_MEM_DRIVER);
 422                 dev->unique = NULL;
 423                 dev->unique_len = 0;
 424         }
 425         /* Clear pid list */
 426         for (i = 0; i < DRM_HASH_SIZE; i++) {
 427                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 428                         next = pt->next;
 429                         free(pt, DRM_MEM_MAGIC);
 430                 }
 431                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 432         }
 433
 434         DRM_UNLOCK(dev);
 435         drm_drawable_free_all(dev);
 436         DRM_LOCK(dev);
 437
 438         /* Clear AGP information */
 439         if (dev->agp) {
 440                 drm_agp_mem_t *entry;
 441                 drm_agp_mem_t *nexte;
 442
 443                 /* Remove AGP resources, but leave dev->agp intact until
 444                  * drm_unload is called.
 445                  */
 446                 for (entry = dev->agp->memory; entry; entry = nexte) {
 447                         nexte = entry->next;
 448                         if (entry->bound)
 449                                 drm_agp_unbind_memory(entry->handle);
 450                         drm_agp_free_memory(entry->handle);
 451                         free(entry, DRM_MEM_AGPLISTS);
 452                 }
 453                 dev->agp->memory = NULL;
 454
 455                 if (dev->agp->acquired)
 456                         drm_agp_release(dev);
 457
 458                 dev->agp->acquired = 0;
 459                 dev->agp->enabled  = 0;
 460         }
 461         if (dev->sg != NULL) {
 462                 drm_sg_cleanup(dev->sg);
 463                 dev->sg = NULL;
 464         }
 465
 466         TAILQ_FOREACH_SAFE(map, &dev->maplist, link, mapsave) {
 467                 if (!(map->flags & _DRM_DRIVER))
 468                         drm_rmmap(dev, map);
 469         }
 470
 471         drm_dma_takedown(dev);
 472         if (dev->lock.hw_lock) {
 473                 dev->lock.hw_lock = NULL; /* SHM removed */
 474                 dev->lock.file_priv = NULL;
 475                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 476         }
 477
 478         return 0;
 479 }
 480
 481 static int drm_load(struct drm_device *dev)
 482 {
 483         int i, retcode;
 484
 485         DRM_DEBUG("\n");
 486
 487         TAILQ_INIT(&dev->maplist);
 488         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 489         if (dev->map_unrhdr == NULL) {
 490                 DRM_ERROR("Couldn't allocate map number allocator\n");
 491                 return EINVAL;
 492         }
 493
 494
 495         drm_mem_init();
 496         drm_sysctl_init(dev);
 497         TAILQ_INIT(&dev->files);
 498
 499         dev->counters  = 6;
 500         dev->types[0]  = _DRM_STAT_LOCK;
 501         dev->types[1]  = _DRM_STAT_OPENS;
 502         dev->types[2]  = _DRM_STAT_CLOSES;
 503         dev->types[3]  = _DRM_STAT_IOCTLS;
 504         dev->types[4]  = _DRM_STAT_LOCKS;
 505         dev->types[5]  = _DRM_STAT_UNLOCKS;
 506
 507         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 508                 atomic_set(&dev->counts[i], 0);
 509
 510         INIT_LIST_HEAD(&dev->vblank_event_list);
 511
 512         if (drm_core_has_AGP(dev)) {
 513                 if (drm_device_is_agp(dev))
 514                         dev->agp = drm_agp_init();
 515                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 516                     dev->agp == NULL) {
 517                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 518                             "AGP.\n");
 519                         retcode = ENOMEM;
 520                         goto error;
 521                 }
 522                 if (dev->agp != NULL && dev->agp->info.ai_aperture_base != 0) {
 523                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
 524                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
 525                                 dev->agp->mtrr = 1;
 526                 }
 527         }
 528
 529         retcode = drm_ctxbitmap_init(dev);
 530         if (retcode != 0) {
 531                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 532                 goto error;
 533         }
 534
 535         dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
 536         if (dev->drw_unrhdr == NULL) {
 537                 DRM_ERROR("Couldn't allocate drawable number allocator\n");
 538                 retcode = ENOMEM;
 539                 goto error;
 540         }
 541
 542         if (dev->driver->driver_features & DRIVER_GEM) {
 543                 retcode = drm_gem_init(dev);
 544                 if (retcode != 0) {
 545                         DRM_ERROR("Cannot initialize graphics execution "
 546                                   "manager (GEM)\n");
 547                         goto error1;
 548                 }
 549         }
 550
 551         if (dev->driver->load != NULL) {
 552                 DRM_LOCK(dev);
 553                 /* Shared code returns -errno. */
 554                 retcode = -dev->driver->load(dev,
 555                     dev->id_entry->driver_private);
 556                 if (pci_enable_busmaster(dev->device))
 557                         DRM_ERROR("Request to enable bus-master failed.\n");
 558                 DRM_UNLOCK(dev);
 559                 if (retcode != 0)
 560                         goto error;
 561         }
 562
 563         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 564             dev->driver->name,
 565             dev->driver->major,
 566             dev->driver->minor,
 567             dev->driver->patchlevel,
 568             dev->driver->date);
 569
 570         return 0;
 571
 572 error1:
 573         delete_unrhdr(dev->drw_unrhdr);
 574 error:
 575         drm_sysctl_cleanup(dev);
 576         DRM_LOCK(dev);
 577         drm_lastclose(dev);
 578         DRM_UNLOCK(dev);
 579         if (dev->devnode != NULL)
 580                 destroy_dev(dev->devnode);
 581
 582         mtx_destroy(&dev->drw_lock);
 583         mtx_destroy(&dev->vbl_lock);
 584         mtx_destroy(&dev->irq_lock);
 585         mtx_destroy(&dev->dev_lock);
 586         mtx_destroy(&dev->event_lock);
 587         sx_destroy(&dev->dev_struct_lock);
 588
 589         return retcode;
 590 }
 591
 592 static void drm_unload(struct drm_device *dev)
 593 {
 594         int i;
 595
 596         DRM_DEBUG("\n");
 597
 598         drm_sysctl_cleanup(dev);
 599         if (dev->devnode != NULL)
 600                 destroy_dev(dev->devnode);
 601
 602         drm_ctxbitmap_cleanup(dev);
 603
 604         if (dev->driver->driver_features & DRIVER_GEM)
 605                 drm_gem_destroy(dev);
 606
 607         if (dev->agp && dev->agp->mtrr) {
 608                 int __unused retcode;
 609
 610                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
 611                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
 612                 DRM_DEBUG("mtrr_del = %d", retcode);
 613         }
 614
 615         drm_vblank_cleanup(dev);
 616
 617         DRM_LOCK(dev);
 618         drm_lastclose(dev);
 619         DRM_UNLOCK(dev);
 620
 621         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 622          * worried about resource consumption while the DRM is inactive (between
 623          * lastclose and firstopen or unload) because these aren't actually
 624          * taking up KVA, just keeping the PCI resource allocated.
 625          */
 626         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 627                 if (dev->pcir[i] == NULL)
 628                         continue;
 629                 bus_release_resource(dev->device, SYS_RES_MEMORY,
 630                     dev->pcirid[i], dev->pcir[i]);
 631                 dev->pcir[i] = NULL;
 632         }
 633
 634         if (dev->agp) {
 635                 free(dev->agp, DRM_MEM_AGPLISTS);
 636                 dev->agp = NULL;
 637         }
 638
 639         if (dev->driver->unload != NULL) {
 640                 DRM_LOCK(dev);
 641                 dev->driver->unload(dev);
 642                 DRM_UNLOCK(dev);
 643         }
 644
 645         delete_unrhdr(dev->drw_unrhdr);
 646         delete_unrhdr(dev->map_unrhdr);
 647
 648         drm_mem_uninit();
 649
 650         if (pci_disable_busmaster(dev->device))
 651                 DRM_ERROR("Request to disable bus-master failed.\n");
 652
 653         mtx_destroy(&dev->drw_lock);
 654         mtx_destroy(&dev->vbl_lock);
 655         mtx_destroy(&dev->irq_lock);
 656         mtx_destroy(&dev->dev_lock);
 657         mtx_destroy(&dev->event_lock);
 658         sx_destroy(&dev->dev_struct_lock);
 659 }
 660
 661 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 662 {
 663         struct drm_version *version = data;
 664         int len;
 665
 666 #define DRM_COPY( name, value )                                         \
 667         len = strlen( value );                                          \
 668         if ( len > name##_len ) len = name##_len;                       \
 669         name##_len = strlen( value );                                   \
 670         if ( len && name ) {                                            \
 671                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 672                         return EFAULT;                          \
 673         }
 674
 675         version->version_major          = dev->driver->major;
 676         version->version_minor          = dev->driver->minor;
 677         version->version_patchlevel     = dev->driver->patchlevel;
 678
 679         DRM_COPY(version->name, dev->driver->name);
 680         DRM_COPY(version->date, dev->driver->date);
 681         DRM_COPY(version->desc, dev->driver->desc);
 682
 683         return 0;
 684 }
 685
 686 int
 687 drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
 688 {
 689         struct drm_device *dev;
 690         int retcode;
 691
 692         dev = kdev->si_drv1;
 693         if (dev == NULL)
 694                 return (ENXIO);
 695
 696         DRM_DEBUG("open_count = %d\n", dev->open_count);
 697
 698         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
 699
 700         if (retcode == 0) {
 701                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 702                 DRM_LOCK(dev);
 703                 mtx_lock(&Giant);
 704                 device_busy(dev->device);
 705                 mtx_unlock(&Giant);
 706                 if (!dev->open_count++)
 707                         retcode = drm_firstopen(dev);
 708                 DRM_UNLOCK(dev);
 709         }
 710
 711         return (retcode);
 712 }
 713
 714 void drm_close(void *data)
 715 {
 716         struct drm_file *file_priv = data;
 717         struct drm_device *dev = file_priv->dev;
 718         int retcode = 0;
 719
 720         DRM_DEBUG("open_count = %d\n", dev->open_count);
 721
 722         DRM_LOCK(dev);
 723
 724         if (dev->driver->preclose != NULL)
 725                 dev->driver->preclose(dev, file_priv);
 726
 727         /* ========================================================
 728          * Begin inline drm_release
 729          */
 730
 731         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 732             DRM_CURRENTPID, (long)dev->device, dev->open_count);
 733
 734         if (dev->driver->driver_features & DRIVER_GEM)
 735                 drm_gem_release(dev, file_priv);
 736
 737         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 738             && dev->lock.file_priv == file_priv) {
 739                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 740                           DRM_CURRENTPID,
 741                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 742                 if (dev->driver->reclaim_buffers_locked != NULL)
 743                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 744
 745                 drm_lock_free(&dev->lock,
 746                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 747
 748                                 /* FIXME: may require heavy-handed reset of
 749                                    hardware at this point, possibly
 750                                    processed via a callback to the X
 751                                    server. */
 752         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 753             dev->lock.hw_lock != NULL) {
 754                 /* The lock is required to reclaim buffers */
 755                 for (;;) {
 756                         if (!dev->lock.hw_lock) {
 757                                 /* Device has been unregistered */
 758                                 retcode = EINTR;
 759                                 break;
 760                         }
 761                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 762                                 dev->lock.file_priv = file_priv;
 763                                 dev->lock.lock_time = jiffies;
 764                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 765                                 break;  /* Got lock */
 766                         }
 767                         /* Contention */
 768                         retcode = DRM_LOCK_SLEEP(dev, &dev->lock.lock_queue,
 769                             PCATCH, "drmlk2", 0);
 770                         if (retcode)
 771                                 break;
 772                 }
 773                 if (retcode == 0) {
 774                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 775                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 776                 }
 777         }
 778
 779         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 780             !dev->driver->reclaim_buffers_locked)
 781                 drm_reclaim_buffers(dev, file_priv);
 782
 783         funsetown(&dev->buf_sigio);
 784         seldrain(&file_priv->event_poll);
 785
 786         if (dev->driver->postclose != NULL)
 787                 dev->driver->postclose(dev, file_priv);
 788         TAILQ_REMOVE(&dev->files, file_priv, link);
 789         free(file_priv, DRM_MEM_FILES);
 790
 791         /* ========================================================
 792          * End inline drm_release
 793          */
 794
 795         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 796         mtx_lock(&Giant);
 797         device_unbusy(dev->device);
 798         mtx_unlock(&Giant);
 799         if (--dev->open_count == 0) {
 800                 retcode = drm_lastclose(dev);
 801         }
 802
 803         DRM_UNLOCK(dev);
 804 }
 805
 806 extern drm_ioctl_desc_t drm_compat_ioctls[];
 807
 808 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 809  */
 810 int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 811     DRM_STRUCTPROC *p)
 812 {
 813         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 814         int retcode = 0;
 815         drm_ioctl_desc_t *ioctl;
 816         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 817         int nr = DRM_IOCTL_NR(cmd);
 818         int is_driver_ioctl = 0;
 819         struct drm_file *file_priv;
 820
 821         retcode = devfs_get_cdevpriv((void **)&file_priv);
 822         if (retcode != 0) {
 823                 DRM_ERROR("can't find authenticator\n");
 824                 return EINVAL;
 825         }
 826
 827         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 828         ++file_priv->ioctl_count;
 829
 830         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 831             DRM_CURRENTPID, cmd, nr, (long)dev->device,
 832             file_priv->authenticated);
 833
 834         switch (cmd) {
 835         case FIONBIO:
 836         case FIOASYNC:
 837                 return 0;
 838
 839         case FIOSETOWN:
 840                 return fsetown(*(int *)data, &dev->buf_sigio);
 841
 842         case FIOGETOWN:
 843                 *(int *) data = fgetown(&dev->buf_sigio);
 844                 return 0;
 845         }
 846
 847         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 848                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 849                 return EINVAL;
 850         }
 851
 852 #ifdef COMPAT_FREEBSD32
 853         /*
 854          * Called whenever a 32-bit process running under a 64-bit
 855          * kernel performs an ioctl on /dev/drm.
 856          */
 857         if (SV_CURPROC_FLAG(SV_ILP32) && drm_compat_ioctls[nr].func != NULL)
 858                 /*
 859                  * Assume that ioctls without an explicit compat
 860                  * routine will just work.  This may not always be a
 861                  * good assumption, but it's better than always
 862                  * failing.
 863                  */
 864                 ioctl = &drm_compat_ioctls[nr];
 865         else
 866 #endif
 867                 ioctl = &drm_ioctls[nr];
 868         /* It's not a core DRM ioctl, try driver-specific. */
 869         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 870                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 871                 nr -= DRM_COMMAND_BASE;
 872                 if (nr > dev->driver->max_ioctl) {
 873                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 874                             nr, dev->driver->max_ioctl);
 875                         return EINVAL;
 876                 }
 877 #ifdef COMPAT_FREEBSD32
 878                 if (SV_CURPROC_FLAG(SV_ILP32) &&
 879                     nr < *dev->driver->compat_ioctls_nr &&
 880                     dev->driver->compat_ioctls[nr].func != NULL)
 881                         ioctl = &dev->driver->compat_ioctls[nr];
 882                 else
 883 #endif
 884                         ioctl = &dev->driver->ioctls[nr];
 885                 is_driver_ioctl = 1;
 886         }
 887         func = ioctl->func;
 888
 889         if (func == NULL) {
 890                 DRM_DEBUG("no function\n");
 891                 return EINVAL;
 892         }
 893
 894         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 895             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 896             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 897                 return EACCES;
 898
 899         if (is_driver_ioctl) {
 900                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 901                         DRM_LOCK(dev);
 902                 /* shared code returns -errno */
 903                 retcode = -func(dev, data, file_priv);
 904                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 905                         DRM_UNLOCK(dev);
 906         } else {
 907                 retcode = func(dev, data, file_priv);
 908         }
 909
 910         if (retcode != 0)
 911                 DRM_DEBUG("    returning %d\n", retcode);
 912         if (retcode != 0 &&
 913             (drm_debug_flag & DRM_DEBUGBITS_FAILED_IOCTL) != 0) {
 914                 printf(
 915 "pid %d, cmd 0x%02lx, nr 0x%02x/%1d, dev 0x%lx, auth %d, res %d\n",
 916                     DRM_CURRENTPID, cmd, nr, is_driver_ioctl, (long)dev->device,
 917                     file_priv->authenticated, retcode);
 918         }
 919
 920         return retcode;
 921 }
 922
 923 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 924 {
 925         drm_local_map_t *map;
 926
 927         DRM_LOCK_ASSERT(dev);
 928         TAILQ_FOREACH(map, &dev->maplist, link) {
 929                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
 930                         return map;
 931         }
 932
 933         return NULL;
 934 }
 935
 936 int
 937 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 938     struct sysctl_oid *top)
 939 {
 940         struct sysctl_oid *oid;
 941
 942         snprintf(dev->busid_str, sizeof(dev->busid_str),
 943              "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus,
 944              dev->pci_slot, dev->pci_func);
 945         oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid",
 946             CTLFLAG_RD, dev->busid_str, 0, NULL);
 947         if (oid == NULL)
 948                 return (ENOMEM);
 949         dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0;
 950         oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO,
 951             "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL);
 952         if (oid == NULL)
 953                 return (ENOMEM);
 954
 955         return (0);
 956 }
 957
 958 #if DRM_LINUX
 959
 960 #include <sys/sysproto.h>
 961
 962 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 963
 964 #define LINUX_IOCTL_DRM_MIN             0x6400
 965 #define LINUX_IOCTL_DRM_MAX             0x64ff
 966
 967 static linux_ioctl_function_t drm_linux_ioctl;
 968 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 969     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 970
 971 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
 972     linux_ioctl_register_handler, &drm_handler);
 973 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
 974     linux_ioctl_unregister_handler, &drm_handler);
 975
 976 /* The bits for in/out are switched on Linux */
 977 #define LINUX_IOC_IN    IOC_OUT
 978 #define LINUX_IOC_OUT   IOC_IN
 979
 980 static int
 981 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 982 {
 983         int error;
 984         int cmd = args->cmd;
 985
 986         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 987         if (cmd & LINUX_IOC_IN)
 988                 args->cmd |= IOC_IN;
 989         if (cmd & LINUX_IOC_OUT)
 990                 args->cmd |= IOC_OUT;
 991
 992         error = ioctl(p, (struct ioctl_args *)args);
 993
 994         return error;
 995 }
 996 #endif /* DRM_LINUX */
 997
 998 bool
 999 dmi_check_system(const struct dmi_system_id *sysid)
1000 {
1001
1002         /* XXXKIB */
1003         return (false);
1004 }
1005