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: src/sys/dev/drm2/drm_drv.c,v 1.1 2012/05/22 11:07:44 kib Exp $");
  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/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 = 1;
  48 #else
  49 int drm_debug_flag = 2;
  50 #endif
  51 int drm_notyet_flag = 0;
  52
  53 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  54 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  55
  56 static int drm_load(struct drm_device *dev);
  57 static void drm_unload(struct drm_device *dev);
  58 static drm_pci_id_list_t *drm_find_description(int vendor, int device,
  59     drm_pci_id_list_t *idlist);
  60
  61 static int
  62 drm_modevent(module_t mod, int type, void *data)
  63 {
  64
  65         switch (type) {
  66         case MOD_LOAD:
  67                 TUNABLE_INT_FETCH("drm.debug", &drm_debug_flag);
  68                 TUNABLE_INT_FETCH("drm.notyet", &drm_notyet_flag);
  69                 break;
  70         }
  71         return (0);
  72 }
  73
  74 static moduledata_t drm_mod = {
  75         "drmn",
  76         drm_modevent,
  77         0
  78 };
  79 DECLARE_MODULE(drmn, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
  80 MODULE_VERSION(drmn, 1);
  81 MODULE_DEPEND(drmn, agp, 1, 1, 1);
  82 MODULE_DEPEND(drmn, pci, 1, 1, 1);
  83 MODULE_DEPEND(drmn, mem, 1, 1, 1);
  84 MODULE_DEPEND(drmn, iicbus, 1, 1, 1);
  85
  86 static drm_ioctl_desc_t           drm_ioctls[256] = {
  87         DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
  88         DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
  89         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
  90         DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
  91         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
  92         DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
  93         DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
  94         DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED),
  95         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
  96
  97         DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  98         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
  99         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 100         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 101
 102         DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 103         DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
 104
 105         DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 106         DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
 107
 108         DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
 109         DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
 110
 111         DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
 112         DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 113         DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 114         DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
 115         DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 116         DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 117         DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
 118
 119         DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 120         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 121
 122         DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
 123         DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
 124
 125         DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
 126
 127         DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 128         DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 129         DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
 130         DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
 131         DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
 132         DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma, DRM_AUTH),
 133
 134         DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 135
 136         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 137         DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 138         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 139         DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
 140         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 141         DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 142         DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 143         DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 144
 145         DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 146         DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 147         DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
 148         DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
 149         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_draw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 150
 151         DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
 152         DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
 153         DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
 154
 155         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 156         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 157         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 158         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 159         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 160         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 161         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 162         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER|DRM_UNLOCKED),
 163         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
 164         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 165         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 166         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 167         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 168         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 169         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 170         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 171         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 172         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 173         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 174         DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 175         DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 176         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 177         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 178         DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 179         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 180 };
 181
 182 static struct cdevsw drm_cdevsw = {
 183         .d_version =    D_VERSION,
 184         .d_open =       drm_open,
 185         .d_read =       drm_read,
 186         .d_ioctl =      drm_ioctl,
 187         .d_poll =       drm_poll,
 188         .d_mmap =       drm_mmap,
 189         .d_mmap_single = drm_gem_mmap_single,
 190         .d_name =       "drm",
 191         .d_flags =      D_TRACKCLOSE
 192 };
 193
 194 static int drm_msi = 1; /* Enable by default. */
 195 TUNABLE_INT("hw.drm.msi", &drm_msi);
 196 SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device");
 197 SYSCTL_INT(_hw_drm, OID_AUTO, msi, CTLFLAG_RDTUN, &drm_msi, 1,
 198     "Enable MSI interrupts for drm devices");
 199
 200 static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
 201         {0x8086, 0x2772}, /* Intel i945G        */ \
 202         {0x8086, 0x27A2}, /* Intel i945GM       */ \
 203         {0x8086, 0x27AE}, /* Intel i945GME      */ \
 204         {0, 0}
 205 };
 206
 207 static int drm_msi_is_blacklisted(int vendor, int device)
 208 {
 209         int i = 0;
 210
 211         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
 212                 if ((drm_msi_blacklist[i].vendor == vendor) &&
 213                     (drm_msi_blacklist[i].device == device)) {
 214                         return 1;
 215                 }
 216         }
 217
 218         return 0;
 219 }
 220
 221 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
 222 {
 223         drm_pci_id_list_t *id_entry;
 224         int vendor, device;
 225
 226         vendor = pci_get_vendor(kdev);
 227         device = pci_get_device(kdev);
 228
 229         if (pci_get_class(kdev) != PCIC_DISPLAY
 230             || pci_get_subclass(kdev) != PCIS_DISPLAY_VGA)
 231                 return ENXIO;
 232
 233         id_entry = drm_find_description(vendor, device, idlist);
 234         if (id_entry != NULL) {
 235                 if (!device_get_desc(kdev)) {
 236                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 237                         device_set_desc(kdev, id_entry->name);
 238                 }
 239                 return 0;
 240         }
 241
 242         return ENXIO;
 243 }
 244
 245 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 246 {
 247         struct drm_device *dev;
 248         drm_pci_id_list_t *id_entry;
 249         int error, msicount;
 250
 251         dev = device_get_softc(kdev);
 252
 253         dev->device = kdev;
 254
 255         dev->pci_domain = pci_get_domain(dev->device);
 256         dev->pci_bus = pci_get_bus(dev->device);
 257         dev->pci_slot = pci_get_slot(dev->device);
 258         dev->pci_func = pci_get_function(dev->device);
 259
 260         dev->pci_vendor = pci_get_vendor(dev->device);
 261         dev->pci_device = pci_get_device(dev->device);
 262
 263         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 264                 if (drm_msi &&
 265                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
 266                         msicount = pci_msi_count(dev->device);
 267                         DRM_DEBUG("MSI count = %d\n", msicount);
 268                         if (msicount > 1)
 269                                 msicount = 1;
 270
 271                         if (pci_alloc_msi(dev->device, &msicount) == 0) {
 272                                 DRM_INFO("MSI enabled %d message(s)\n",
 273                                     msicount);
 274                                 dev->msi_enabled = 1;
 275                                 dev->irqrid = 1;
 276                         }
 277                 }
 278
 279                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
 280                     &dev->irqrid, RF_SHAREABLE);
 281                 if (!dev->irqr) {
 282                         return (ENOENT);
 283                 }
 284
 285                 dev->irq = (int) rman_get_start(dev->irqr);
 286         }
 287
 288         mtx_init(&dev->dev_lock, "drmdev", NULL, MTX_DEF);
 289         mtx_init(&dev->irq_lock, "drmirq", NULL, MTX_DEF);
 290         mtx_init(&dev->vbl_lock, "drmvbl", NULL, MTX_DEF);
 291         mtx_init(&dev->drw_lock, "drmdrw", NULL, MTX_DEF);
 292         mtx_init(&dev->event_lock, "drmev", NULL, MTX_DEF);
 293         sx_init(&dev->dev_struct_lock, "drmslk");
 294
 295         id_entry = drm_find_description(dev->pci_vendor,
 296             dev->pci_device, idlist);
 297         dev->id_entry = id_entry;
 298
 299         error = drm_load(dev);
 300         if (error == 0)
 301                 error = drm_create_cdevs(kdev);
 302         return (error);
 303 }
 304
 305 int
 306 drm_create_cdevs(device_t kdev)
 307 {
 308         struct drm_device *dev;
 309         int error, unit;
 310
 311         unit = device_get_unit(kdev);
 312         dev = device_get_softc(kdev);
 313
 314         error = make_dev_p(MAKEDEV_WAITOK | MAKEDEV_CHECKNAME, &dev->devnode,
 315             &drm_cdevsw, 0, DRM_DEV_UID, DRM_DEV_GID,
 316             DRM_DEV_MODE, "dri/card%d", unit);
 317         if (error == 0)
 318                 dev->devnode->si_drv1 = dev;
 319         return (error);
 320 }
 321
 322 int drm_detach(device_t kdev)
 323 {
 324         struct drm_device *dev;
 325
 326         dev = device_get_softc(kdev);
 327         drm_unload(dev);
 328         if (dev->irqr) {
 329                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 330                     dev->irqr);
 331                 if (dev->msi_enabled) {
 332                         pci_release_msi(dev->device);
 333                         DRM_INFO("MSI released\n");
 334                 }
 335         }
 336         return (0);
 337 }
 338
 339 #ifndef DRM_DEV_NAME
 340 #define DRM_DEV_NAME "drm"
 341 #endif
 342
 343 devclass_t drm_devclass;
 344
 345 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 346     drm_pci_id_list_t *idlist)
 347 {
 348         int i = 0;
 349
 350         for (i = 0; idlist[i].vendor != 0; i++) {
 351                 if ((idlist[i].vendor == vendor) &&
 352                     ((idlist[i].device == device) ||
 353                     (idlist[i].device == 0))) {
 354                         return &idlist[i];
 355                 }
 356         }
 357         return NULL;
 358 }
 359
 360 static int drm_firstopen(struct drm_device *dev)
 361 {
 362         drm_local_map_t *map;
 363         int i;
 364
 365         DRM_LOCK_ASSERT(dev);
 366
 367         /* prebuild the SAREA */
 368         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
 369             _DRM_CONTAINS_LOCK, &map);
 370         if (i != 0)
 371                 return i;
 372
 373         if (dev->driver->firstopen)
 374                 dev->driver->firstopen(dev);
 375
 376         dev->buf_use = 0;
 377
 378         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
 379                 i = drm_dma_setup(dev);
 380                 if (i != 0)
 381                         return i;
 382         }
 383
 384         for (i = 0; i < DRM_HASH_SIZE; i++) {
 385                 dev->magiclist[i].head = NULL;
 386                 dev->magiclist[i].tail = NULL;
 387         }
 388
 389         dev->lock.lock_queue = 0;
 390         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 391                 dev->irq_enabled = 0;
 392         dev->context_flag = 0;
 393         dev->last_context = 0;
 394         dev->if_version = 0;
 395
 396         dev->buf_sigio = NULL;
 397
 398         DRM_DEBUG("\n");
 399
 400         return 0;
 401 }
 402
 403 static int drm_lastclose(struct drm_device *dev)
 404 {
 405         drm_magic_entry_t *pt, *next;
 406         drm_local_map_t *map, *mapsave;
 407         int i;
 408
 409         DRM_LOCK_ASSERT(dev);
 410
 411         DRM_DEBUG("\n");
 412
 413         if (dev->driver->lastclose != NULL)
 414                 dev->driver->lastclose(dev);
 415
 416         if (!drm_core_check_feature(dev, DRIVER_MODESET) && dev->irq_enabled)
 417                 drm_irq_uninstall(dev);
 418
 419         if (dev->unique) {
 420                 free(dev->unique, DRM_MEM_DRIVER);
 421                 dev->unique = NULL;
 422                 dev->unique_len = 0;
 423         }
 424         /* Clear pid list */
 425         for (i = 0; i < DRM_HASH_SIZE; i++) {
 426                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 427                         next = pt->next;
 428                         free(pt, DRM_MEM_MAGIC);
 429                 }
 430                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 431         }
 432
 433         DRM_UNLOCK(dev);
 434         drm_drawable_free_all(dev);
 435         DRM_LOCK(dev);
 436
 437         /* Clear AGP information */
 438         if (dev->agp) {
 439                 drm_agp_mem_t *entry;
 440                 drm_agp_mem_t *nexte;
 441
 442                 /* Remove AGP resources, but leave dev->agp intact until
 443                  * drm_unload is called.
 444                  */
 445                 for (entry = dev->agp->memory; entry; entry = nexte) {
 446                         nexte = entry->next;
 447                         if (entry->bound)
 448                                 drm_agp_unbind_memory(entry->handle);
 449                         drm_agp_free_memory(entry->handle);
 450                         free(entry, DRM_MEM_AGPLISTS);
 451                 }
 452                 dev->agp->memory = NULL;
 453
 454                 if (dev->agp->acquired)
 455                         drm_agp_release(dev);
 456
 457                 dev->agp->acquired = 0;
 458                 dev->agp->enabled  = 0;
 459         }
 460         if (dev->sg != NULL) {
 461                 drm_sg_cleanup(dev->sg);
 462                 dev->sg = NULL;
 463         }
 464
 465         TAILQ_FOREACH_SAFE(map, &dev->maplist, link, mapsave) {
 466                 if (!(map->flags & _DRM_DRIVER))
 467                         drm_rmmap(dev, map);
 468         }
 469
 470         drm_dma_takedown(dev);
 471         if (dev->lock.hw_lock) {
 472                 dev->lock.hw_lock = NULL; /* SHM removed */
 473                 dev->lock.file_priv = NULL;
 474                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 475         }
 476
 477         return 0;
 478 }
 479
 480 static int drm_load(struct drm_device *dev)
 481 {
 482         int i, retcode;
 483
 484         DRM_DEBUG("\n");
 485
 486         TAILQ_INIT(&dev->maplist);
 487         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 488         if (dev->map_unrhdr == NULL) {
 489                 DRM_ERROR("Couldn't allocate map number allocator\n");
 490                 return EINVAL;
 491         }
 492
 493
 494         drm_mem_init();
 495         drm_sysctl_init(dev);
 496         TAILQ_INIT(&dev->files);
 497
 498         dev->counters  = 6;
 499         dev->types[0]  = _DRM_STAT_LOCK;
 500         dev->types[1]  = _DRM_STAT_OPENS;
 501         dev->types[2]  = _DRM_STAT_CLOSES;
 502         dev->types[3]  = _DRM_STAT_IOCTLS;
 503         dev->types[4]  = _DRM_STAT_LOCKS;
 504         dev->types[5]  = _DRM_STAT_UNLOCKS;
 505
 506         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 507                 atomic_set(&dev->counts[i], 0);
 508
 509         INIT_LIST_HEAD(&dev->vblank_event_list);
 510
 511         if (drm_core_has_AGP(dev)) {
 512                 if (drm_device_is_agp(dev))
 513                         dev->agp = drm_agp_init();
 514                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 515                     dev->agp == NULL) {
 516                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 517                             "AGP.\n");
 518                         retcode = ENOMEM;
 519                         goto error;
 520                 }
 521                 if (dev->agp != NULL && dev->agp->info.ai_aperture_base != 0) {
 522                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
 523                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
 524                                 dev->agp->mtrr = 1;
 525                 }
 526         }
 527
 528         retcode = drm_ctxbitmap_init(dev);
 529         if (retcode != 0) {
 530                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 531                 goto error;
 532         }
 533
 534         dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
 535         if (dev->drw_unrhdr == NULL) {
 536                 DRM_ERROR("Couldn't allocate drawable number allocator\n");
 537                 retcode = ENOMEM;
 538                 goto error;
 539         }
 540
 541         if (dev->driver->driver_features & DRIVER_GEM) {
 542                 retcode = drm_gem_init(dev);
 543                 if (retcode != 0) {
 544                         DRM_ERROR("Cannot initialize graphics execution "
 545                                   "manager (GEM)\n");
 546                         goto error1;
 547                 }
 548         }
 549
 550         if (dev->driver->load != NULL) {
 551                 DRM_LOCK(dev);
 552                 /* Shared code returns -errno. */
 553                 retcode = -dev->driver->load(dev,
 554                     dev->id_entry->driver_private);
 555                 if (pci_enable_busmaster(dev->device))
 556                         DRM_ERROR("Request to enable bus-master failed.\n");
 557                 DRM_UNLOCK(dev);
 558                 if (retcode != 0)
 559                         goto error;
 560         }
 561
 562         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 563             dev->driver->name,
 564             dev->driver->major,
 565             dev->driver->minor,
 566             dev->driver->patchlevel,
 567             dev->driver->date);
 568
 569         return 0;
 570
 571 error1:
 572         delete_unrhdr(dev->drw_unrhdr);
 573 error:
 574         drm_sysctl_cleanup(dev);
 575         DRM_LOCK(dev);
 576         drm_lastclose(dev);
 577         DRM_UNLOCK(dev);
 578         if (dev->devnode != NULL)
 579                 destroy_dev(dev->devnode);
 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         mtx_destroy(&dev->event_lock);
 586         sx_destroy(&dev->dev_struct_lock);
 587
 588         return retcode;
 589 }
 590
 591 static void drm_unload(struct drm_device *dev)
 592 {
 593         int i;
 594
 595         DRM_DEBUG("\n");
 596
 597         drm_sysctl_cleanup(dev);
 598         if (dev->devnode != NULL)
 599                 destroy_dev(dev->devnode);
 600
 601         drm_ctxbitmap_cleanup(dev);
 602
 603         if (dev->driver->driver_features & DRIVER_GEM)
 604                 drm_gem_destroy(dev);
 605
 606         if (dev->agp && dev->agp->mtrr) {
 607                 int __unused retcode;
 608
 609                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
 610                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
 611                 DRM_DEBUG("mtrr_del = %d", retcode);
 612         }
 613
 614         drm_vblank_cleanup(dev);
 615
 616         DRM_LOCK(dev);
 617         drm_lastclose(dev);
 618         DRM_UNLOCK(dev);
 619
 620         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 621          * worried about resource consumption while the DRM is inactive (between
 622          * lastclose and firstopen or unload) because these aren't actually
 623          * taking up KVA, just keeping the PCI resource allocated.
 624          */
 625         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 626                 if (dev->pcir[i] == NULL)
 627                         continue;
 628                 bus_release_resource(dev->device, SYS_RES_MEMORY,
 629                     dev->pcirid[i], dev->pcir[i]);
 630                 dev->pcir[i] = NULL;
 631         }
 632
 633         if (dev->agp) {
 634                 free(dev->agp, DRM_MEM_AGPLISTS);
 635                 dev->agp = NULL;
 636         }
 637
 638         if (dev->driver->unload != NULL) {
 639                 DRM_LOCK(dev);
 640                 dev->driver->unload(dev);
 641                 DRM_UNLOCK(dev);
 642         }
 643
 644         delete_unrhdr(dev->drw_unrhdr);
 645         delete_unrhdr(dev->map_unrhdr);
 646
 647         drm_mem_uninit();
 648
 649         if (pci_disable_busmaster(dev->device))
 650                 DRM_ERROR("Request to disable bus-master failed.\n");
 651
 652         mtx_destroy(&dev->drw_lock);
 653         mtx_destroy(&dev->vbl_lock);
 654         mtx_destroy(&dev->irq_lock);
 655         mtx_destroy(&dev->dev_lock);
 656         mtx_destroy(&dev->event_lock);
 657         sx_destroy(&dev->dev_struct_lock);
 658 }
 659
 660 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 661 {
 662         struct drm_version *version = data;
 663         int len;
 664
 665 #define DRM_COPY( name, value )                                         \
 666         len = strlen( value );                                          \
 667         if ( len > name##_len ) len = name##_len;                       \
 668         name##_len = strlen( value );                                   \
 669         if ( len && name ) {                                            \
 670                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 671                         return EFAULT;                          \
 672         }
 673
 674         version->version_major          = dev->driver->major;
 675         version->version_minor          = dev->driver->minor;
 676         version->version_patchlevel     = dev->driver->patchlevel;
 677
 678         DRM_COPY(version->name, dev->driver->name);
 679         DRM_COPY(version->date, dev->driver->date);
 680         DRM_COPY(version->desc, dev->driver->desc);
 681
 682         return 0;
 683 }
 684
 685 int
 686 drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
 687 {
 688         struct drm_device *dev;
 689         int retcode;
 690
 691         dev = kdev->si_drv1;
 692         if (dev == NULL)
 693                 return (ENXIO);
 694
 695         DRM_DEBUG("open_count = %d\n", dev->open_count);
 696
 697         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
 698
 699         if (retcode == 0) {
 700                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 701                 DRM_LOCK(dev);
 702                 mtx_lock(&Giant);
 703                 device_busy(dev->device);
 704                 mtx_unlock(&Giant);
 705                 if (!dev->open_count++)
 706                         retcode = drm_firstopen(dev);
 707                 DRM_UNLOCK(dev);
 708         }
 709
 710         return (retcode);
 711 }
 712
 713 void drm_close(void *data)
 714 {
 715         struct drm_file *file_priv = data;
 716         struct drm_device *dev = file_priv->dev;
 717         int retcode = 0;
 718
 719         DRM_DEBUG("open_count = %d\n", dev->open_count);
 720
 721         DRM_LOCK(dev);
 722
 723         if (dev->driver->preclose != NULL)
 724                 dev->driver->preclose(dev, file_priv);
 725
 726         /* ========================================================
 727          * Begin inline drm_release
 728          */
 729
 730         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 731             DRM_CURRENTPID, (long)dev->device, dev->open_count);
 732
 733         if (dev->driver->driver_features & DRIVER_GEM)
 734                 drm_gem_release(dev, file_priv);
 735
 736         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 737             && dev->lock.file_priv == file_priv) {
 738                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 739                           DRM_CURRENTPID,
 740                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 741                 if (dev->driver->reclaim_buffers_locked != NULL)
 742                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 743
 744                 drm_lock_free(&dev->lock,
 745                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 746
 747                                 /* FIXME: may require heavy-handed reset of
 748                                    hardware at this point, possibly
 749                                    processed via a callback to the X
 750                                    server. */
 751         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 752             dev->lock.hw_lock != NULL) {
 753                 /* The lock is required to reclaim buffers */
 754                 for (;;) {
 755                         if (!dev->lock.hw_lock) {
 756                                 /* Device has been unregistered */
 757                                 retcode = EINTR;
 758                                 break;
 759                         }
 760                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 761                                 dev->lock.file_priv = file_priv;
 762                                 dev->lock.lock_time = jiffies;
 763                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 764                                 break;  /* Got lock */
 765                         }
 766                         /* Contention */
 767                         retcode = DRM_LOCK_SLEEP(dev, &dev->lock.lock_queue,
 768                             PCATCH, "drmlk2", 0);
 769                         if (retcode)
 770                                 break;
 771                 }
 772                 if (retcode == 0) {
 773                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 774                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 775                 }
 776         }
 777
 778         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 779             !dev->driver->reclaim_buffers_locked)
 780                 drm_reclaim_buffers(dev, file_priv);
 781
 782         funsetown(&dev->buf_sigio);
 783         seldrain(&file_priv->event_poll);
 784
 785         if (dev->driver->postclose != NULL)
 786                 dev->driver->postclose(dev, file_priv);
 787         TAILQ_REMOVE(&dev->files, file_priv, link);
 788         free(file_priv, DRM_MEM_FILES);
 789
 790         /* ========================================================
 791          * End inline drm_release
 792          */
 793
 794         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 795         mtx_lock(&Giant);
 796         device_unbusy(dev->device);
 797         mtx_unlock(&Giant);
 798         if (--dev->open_count == 0) {
 799                 retcode = drm_lastclose(dev);
 800         }
 801
 802         DRM_UNLOCK(dev);
 803 }
 804
 805 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 806  */
 807 int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 808     DRM_STRUCTPROC *p)
 809 {
 810         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 811         int retcode = 0;
 812         drm_ioctl_desc_t *ioctl;
 813         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 814         int nr = DRM_IOCTL_NR(cmd);
 815         int is_driver_ioctl = 0;
 816         struct drm_file *file_priv;
 817
 818         retcode = devfs_get_cdevpriv((void **)&file_priv);
 819         if (retcode != 0) {
 820                 DRM_ERROR("can't find authenticator\n");
 821                 return EINVAL;
 822         }
 823
 824         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 825         ++file_priv->ioctl_count;
 826
 827         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 828             DRM_CURRENTPID, cmd, nr, (long)dev->device,
 829             file_priv->authenticated);
 830
 831         switch (cmd) {
 832         case FIONBIO:
 833         case FIOASYNC:
 834                 return 0;
 835
 836         case FIOSETOWN:
 837                 return fsetown(*(int *)data, &dev->buf_sigio);
 838
 839         case FIOGETOWN:
 840                 *(int *) data = fgetown(&dev->buf_sigio);
 841                 return 0;
 842         }
 843
 844         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 845                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 846                 return EINVAL;
 847         }
 848
 849         ioctl = &drm_ioctls[nr];
 850         /* It's not a core DRM ioctl, try driver-specific. */
 851         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 852                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 853                 nr -= DRM_COMMAND_BASE;
 854                 if (nr > dev->driver->max_ioctl) {
 855                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 856                             nr, dev->driver->max_ioctl);
 857                         return EINVAL;
 858                 }
 859                 ioctl = &dev->driver->ioctls[nr];
 860                 is_driver_ioctl = 1;
 861         }
 862         func = ioctl->func;
 863
 864         if (func == NULL) {
 865                 DRM_DEBUG("no function\n");
 866                 return EINVAL;
 867         }
 868
 869         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 870             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 871             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 872                 return EACCES;
 873
 874         if (is_driver_ioctl) {
 875                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 876                         DRM_LOCK(dev);
 877                 /* shared code returns -errno */
 878                 retcode = -func(dev, data, file_priv);
 879                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 880                         DRM_UNLOCK(dev);
 881         } else {
 882                 retcode = func(dev, data, file_priv);
 883         }
 884
 885         if (retcode != 0)
 886                 DRM_DEBUG("    returning %d\n", retcode);
 887         if (retcode != 0 &&
 888             (drm_debug_flag & DRM_DEBUGBITS_FAILED_IOCTL) != 0) {
 889                 printf(
 890 "pid %d, cmd 0x%02lx, nr 0x%02x/%1d, dev 0x%lx, auth %d, res %d\n",
 891                     DRM_CURRENTPID, cmd, nr, is_driver_ioctl, (long)dev->device,
 892                     file_priv->authenticated, retcode);
 893         }
 894
 895         return retcode;
 896 }
 897
 898 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 899 {
 900         drm_local_map_t *map;
 901
 902         DRM_LOCK_ASSERT(dev);
 903         TAILQ_FOREACH(map, &dev->maplist, link) {
 904                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
 905                         return map;
 906         }
 907
 908         return NULL;
 909 }
 910
 911 int
 912 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 913     struct sysctl_oid *top)
 914 {
 915         struct sysctl_oid *oid;
 916
 917         snprintf(dev->busid_str, sizeof(dev->busid_str),
 918              "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus,
 919              dev->pci_slot, dev->pci_func);
 920         oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid",
 921             CTLFLAG_RD, dev->busid_str, 0, NULL);
 922         if (oid == NULL)
 923                 return (ENOMEM);
 924         dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0;
 925         oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO,
 926             "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL);
 927         if (oid == NULL)
 928                 return (ENOMEM);
 929
 930         return (0);
 931 }
 932
 933 #if DRM_LINUX
 934
 935 #include <sys/sysproto.h>
 936
 937 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 938
 939 #define LINUX_IOCTL_DRM_MIN             0x6400
 940 #define LINUX_IOCTL_DRM_MAX             0x64ff
 941
 942 static linux_ioctl_function_t drm_linux_ioctl;
 943 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 944     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 945
 946 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
 947     linux_ioctl_register_handler, &drm_handler);
 948 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
 949     linux_ioctl_unregister_handler, &drm_handler);
 950
 951 /* The bits for in/out are switched on Linux */
 952 #define LINUX_IOC_IN    IOC_OUT
 953 #define LINUX_IOC_OUT   IOC_IN
 954
 955 static int
 956 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 957 {
 958         int error;
 959         int cmd = args->cmd;
 960
 961         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 962         if (cmd & LINUX_IOC_IN)
 963                 args->cmd |= IOC_IN;
 964         if (cmd & LINUX_IOC_OUT)
 965                 args->cmd |= IOC_OUT;
 966
 967         error = ioctl(p, (struct ioctl_args *)args);
 968
 969         return error;
 970 }
 971 #endif /* DRM_LINUX */
 972
 973 bool
 974 dmi_check_system(const struct dmi_system_id *sysid)
 975 {
 976
 977         /* XXXKIB */
 978         return (false);
 979 }
 980