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  * $FreeBSD: src/sys/dev/drm2/drm_drv.c,v 1.1 2012/05/22 11:07:44 kib Exp $
  30  */
  31
  32 /** @file drm_drv.c
  33  * The catch-all file for DRM device support, including module setup/teardown,
  34  * open/close, and ioctl dispatch.
  35  */
  36
  37
  38 #include <sys/limits.h>
  39 #include <sys/devfs.h>
  40 #include <dev/drm2/drmP.h>
  41 #include <dev/drm2/drm.h>
  42 #include <dev/drm2/drm_sarea.h>
  43 #include <dev/drm2/drm_mode.h>
  44
  45 #ifdef DRM_DEBUG_DEFAULT_ON
  46 int drm_debug_flag = 1;
  47 #else
  48 int drm_debug_flag = 2;
  49 #endif
  50 int drm_notyet_flag = 0;
  51
  52 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  53 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  54
  55 static int drm_load(struct drm_device *dev);
  56 static void drm_unload(struct drm_device *dev);
  57 static drm_pci_id_list_t *drm_find_description(int vendor, int device,
  58     drm_pci_id_list_t *idlist);
  59
  60 #define DRIVER_SOFTC(unit) \
  61         ((struct drm_device *)devclass_get_softc(drm_devclass, unit))
  62
  63 static int
  64 drm_modevent(module_t mod, int type, void *data)
  65 {
  66
  67         switch (type) {
  68         case MOD_LOAD:
  69                 TUNABLE_INT_FETCH("drm.debug", &drm_debug_flag);
  70                 TUNABLE_INT_FETCH("drm.notyet", &drm_notyet_flag);
  71                 break;
  72         }
  73         return (0);
  74 }
  75
  76 static moduledata_t drm_mod = {
  77         "drmn",
  78         drm_modevent,
  79         0
  80 };
  81 DECLARE_MODULE(drmn, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
  82 MODULE_VERSION(drmn, 1);
  83 MODULE_DEPEND(drmn, agp, 1, 1, 1);
  84 MODULE_DEPEND(drmn, pci, 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 dev_ops drm_cdevsw = {
 184         { "drm", 0, D_TRACKCLOSE },
 185         .d_open =       drm_open,
 186         .d_close =      drm_close,
 187         .d_read =       drm_read,
 188         .d_ioctl =      drm_ioctl,
 189         .d_kqfilter =   drm_kqfilter,
 190         .d_mmap =       drm_mmap,
 191         .d_mmap_single =        drm_mmap_single,
 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_RD, &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 unit, msicount;
 250         int rid = 0;
 251
 252         unit = device_get_unit(kdev);
 253         dev = device_get_softc(kdev);
 254
 255         if (!strcmp(device_get_name(kdev), "drmsub"))
 256                 dev->device = device_get_parent(kdev);
 257         else
 258                 dev->device = kdev;
 259
 260         dev->devnode = make_dev(&drm_cdevsw, unit, DRM_DEV_UID, DRM_DEV_GID,
 261                                 DRM_DEV_MODE, "dri/card%d", unit);
 262
 263         dev->pci_domain = pci_get_domain(dev->device);
 264         dev->pci_bus = pci_get_bus(dev->device);
 265         dev->pci_slot = pci_get_slot(dev->device);
 266         dev->pci_func = pci_get_function(dev->device);
 267
 268         dev->pci_vendor = pci_get_vendor(dev->device);
 269         dev->pci_device = pci_get_device(dev->device);
 270
 271         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 272                 if (drm_msi &&
 273                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
 274                         msicount = pci_msi_count(dev->device);
 275                         DRM_DEBUG("MSI count = %d\n", msicount);
 276                         if (msicount > 1)
 277                                 msicount = 1;
 278
 279                         if (pci_alloc_msi(dev->device, &rid, msicount, -1) == 0) {
 280                                 DRM_INFO("MSI enabled %d message(s)\n",
 281                                     msicount);
 282                                 dev->msi_enabled = 1;
 283                                 dev->irqrid = rid;
 284                         }
 285                 }
 286
 287                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
 288                     &dev->irqrid, RF_SHAREABLE);
 289                 if (!dev->irqr) {
 290                         return (ENOENT);
 291                 }
 292
 293                 dev->irq = (int) rman_get_start(dev->irqr);
 294         }
 295
 296         lockinit(&dev->dev_lock, "drmdev", 0, LK_CANRECURSE);
 297         lwkt_serialize_init(&dev->irq_lock);
 298         lockinit(&dev->vbl_lock, "drmvbl", 0, LK_CANRECURSE);
 299         DRM_SPININIT(&dev->drw_lock, "drmdrw");
 300         lockinit(&dev->event_lock, "drmev", 0, LK_CANRECURSE);
 301         lockinit(&dev->dev_struct_lock, "drmslk", 0, LK_CANRECURSE);
 302
 303         id_entry = drm_find_description(dev->pci_vendor,
 304             dev->pci_device, idlist);
 305         dev->id_entry = id_entry;
 306
 307         return drm_load(dev);
 308 }
 309
 310 int drm_detach(device_t kdev)
 311 {
 312         struct drm_device *dev;
 313
 314         dev = device_get_softc(kdev);
 315         drm_unload(dev);
 316         if (dev->irqr) {
 317                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 318                     dev->irqr);
 319                 if (dev->msi_enabled) {
 320                         pci_release_msi(dev->device);
 321                         DRM_INFO("MSI released\n");
 322                 }
 323         }
 324         return (0);
 325 }
 326
 327 #ifndef DRM_DEV_NAME
 328 #define DRM_DEV_NAME "drm"
 329 #endif
 330
 331 devclass_t drm_devclass;
 332
 333 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 334     drm_pci_id_list_t *idlist)
 335 {
 336         int i = 0;
 337
 338         for (i = 0; idlist[i].vendor != 0; i++) {
 339                 if ((idlist[i].vendor == vendor) &&
 340                     ((idlist[i].device == device) ||
 341                     (idlist[i].device == 0))) {
 342                         return &idlist[i];
 343                 }
 344         }
 345         return NULL;
 346 }
 347
 348 static int drm_firstopen(struct drm_device *dev)
 349 {
 350         drm_local_map_t *map;
 351         int i;
 352
 353         DRM_LOCK_ASSERT(dev);
 354
 355         /* prebuild the SAREA */
 356         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
 357             _DRM_CONTAINS_LOCK, &map);
 358         if (i != 0)
 359                 return i;
 360
 361         if (dev->driver->firstopen)
 362                 dev->driver->firstopen(dev);
 363
 364         dev->buf_use = 0;
 365
 366         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
 367                 i = drm_dma_setup(dev);
 368                 if (i != 0)
 369                         return i;
 370         }
 371
 372         for (i = 0; i < DRM_HASH_SIZE; i++) {
 373                 dev->magiclist[i].head = NULL;
 374                 dev->magiclist[i].tail = NULL;
 375         }
 376
 377         dev->lock.lock_queue = 0;
 378         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 379                 dev->irq_enabled = 0;
 380         dev->context_flag = 0;
 381         dev->last_context = 0;
 382         dev->if_version = 0;
 383
 384         dev->buf_sigio = NULL;
 385
 386         DRM_DEBUG("\n");
 387
 388         return 0;
 389 }
 390
 391 static int drm_lastclose(struct drm_device *dev)
 392 {
 393         drm_magic_entry_t *pt, *next;
 394         drm_local_map_t *map, *mapsave;
 395         int i;
 396
 397         DRM_LOCK_ASSERT(dev);
 398
 399         DRM_DEBUG("\n");
 400
 401         if (dev->driver->lastclose != NULL)
 402                 dev->driver->lastclose(dev);
 403
 404         if (!drm_core_check_feature(dev, DRIVER_MODESET) && dev->irq_enabled)
 405                 drm_irq_uninstall(dev);
 406
 407         if (dev->unique) {
 408                 free(dev->unique, DRM_MEM_DRIVER);
 409                 dev->unique = NULL;
 410                 dev->unique_len = 0;
 411         }
 412         /* Clear pid list */
 413         for (i = 0; i < DRM_HASH_SIZE; i++) {
 414                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 415                         next = pt->next;
 416                         free(pt, DRM_MEM_MAGIC);
 417                 }
 418                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 419         }
 420
 421         DRM_UNLOCK(dev);
 422         drm_drawable_free_all(dev);
 423         DRM_LOCK(dev);
 424
 425         /* Clear AGP information */
 426         if (dev->agp) {
 427                 drm_agp_mem_t *entry;
 428                 drm_agp_mem_t *nexte;
 429
 430                 /* Remove AGP resources, but leave dev->agp intact until
 431                  * drm_unload is called.
 432                  */
 433                 for (entry = dev->agp->memory; entry; entry = nexte) {
 434                         nexte = entry->next;
 435                         if (entry->bound)
 436                                 drm_agp_unbind_memory(entry->handle);
 437                         drm_agp_free_memory(entry->handle);
 438                         free(entry, DRM_MEM_AGPLISTS);
 439                 }
 440                 dev->agp->memory = NULL;
 441
 442                 if (dev->agp->acquired)
 443                         drm_agp_release(dev);
 444
 445                 dev->agp->acquired = 0;
 446                 dev->agp->enabled  = 0;
 447         }
 448         if (dev->sg != NULL) {
 449                 drm_sg_cleanup(dev->sg);
 450                 dev->sg = NULL;
 451         }
 452
 453 #if defined(__DragonFly__)
 454         TAILQ_FOREACH_MUTABLE(map, &dev->maplist, link, mapsave) {
 455 #else
 456         TAILQ_FOREACH_SAFE(map, &dev->maplist, link, mapsave) {
 457 #endif
 458                 if (!(map->flags & _DRM_DRIVER))
 459                         drm_rmmap(dev, map);
 460         }
 461
 462         drm_dma_takedown(dev);
 463         if (dev->lock.hw_lock) {
 464                 dev->lock.hw_lock = NULL; /* SHM removed */
 465                 dev->lock.file_priv = NULL;
 466                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 467         }
 468
 469         return 0;
 470 }
 471
 472 static int drm_load(struct drm_device *dev)
 473 {
 474         int i, retcode;
 475
 476         DRM_DEBUG("\n");
 477
 478         TAILQ_INIT(&dev->maplist);
 479         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 480         if (dev->map_unrhdr == NULL) {
 481                 DRM_ERROR("Couldn't allocate map number allocator\n");
 482                 return EINVAL;
 483         }
 484
 485
 486         drm_mem_init();
 487         drm_sysctl_init(dev);
 488         TAILQ_INIT(&dev->files);
 489
 490         dev->counters  = 6;
 491         dev->types[0]  = _DRM_STAT_LOCK;
 492         dev->types[1]  = _DRM_STAT_OPENS;
 493         dev->types[2]  = _DRM_STAT_CLOSES;
 494         dev->types[3]  = _DRM_STAT_IOCTLS;
 495         dev->types[4]  = _DRM_STAT_LOCKS;
 496         dev->types[5]  = _DRM_STAT_UNLOCKS;
 497
 498         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 499                 atomic_set(&dev->counts[i], 0);
 500
 501         INIT_LIST_HEAD(&dev->vblank_event_list);
 502
 503         if (drm_core_has_AGP(dev)) {
 504                 if (drm_device_is_agp(dev))
 505                         dev->agp = drm_agp_init();
 506                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 507                     dev->agp == NULL) {
 508                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 509                             "AGP.\n");
 510                         retcode = ENOMEM;
 511                         goto error;
 512                 }
 513                 if (dev->agp != NULL && dev->agp->info.ai_aperture_base != 0) {
 514                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
 515                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
 516                                 dev->agp->mtrr = 1;
 517                 }
 518         }
 519
 520         retcode = drm_ctxbitmap_init(dev);
 521         if (retcode != 0) {
 522                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 523                 goto error;
 524         }
 525
 526         dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
 527         if (dev->drw_unrhdr == NULL) {
 528                 DRM_ERROR("Couldn't allocate drawable number allocator\n");
 529                 retcode = ENOMEM;
 530                 goto error;
 531         }
 532
 533         if (dev->driver->driver_features & DRIVER_GEM) {
 534                 retcode = drm_gem_init(dev);
 535                 if (retcode != 0) {
 536                         DRM_ERROR("Cannot initialize graphics execution "
 537                                   "manager (GEM)\n");
 538                         goto error1;
 539                 }
 540         }
 541
 542         if (dev->driver->load != NULL) {
 543                 DRM_LOCK(dev);
 544                 /* Shared code returns -errno. */
 545                 retcode = -dev->driver->load(dev,
 546                     dev->id_entry->driver_private);
 547                 if (pci_enable_busmaster(dev->device))
 548                         DRM_ERROR("Request to enable bus-master failed.\n");
 549                 DRM_UNLOCK(dev);
 550                 if (retcode != 0)
 551                         goto error;
 552         }
 553
 554         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 555             dev->driver->name,
 556             dev->driver->major,
 557             dev->driver->minor,
 558             dev->driver->patchlevel,
 559             dev->driver->date);
 560
 561         return 0;
 562
 563 error1:
 564         delete_unrhdr(dev->drw_unrhdr);
 565 error:
 566         drm_sysctl_cleanup(dev);
 567         DRM_LOCK(dev);
 568         drm_lastclose(dev);
 569         DRM_UNLOCK(dev);
 570         if (dev->devnode != NULL)
 571                 destroy_dev(dev->devnode);
 572
 573         DRM_SPINUNINIT(&dev->drw_lock);
 574         lockuninit(&dev->vbl_lock);
 575         lockuninit(&dev->dev_lock);
 576         lockuninit(&dev->event_lock);
 577         lockuninit(&dev->dev_struct_lock);
 578
 579         return retcode;
 580 }
 581
 582 static void drm_unload(struct drm_device *dev)
 583 {
 584         int i;
 585
 586         DRM_DEBUG("\n");
 587
 588         drm_sysctl_cleanup(dev);
 589         if (dev->devnode != NULL)
 590                 destroy_dev(dev->devnode);
 591
 592         drm_ctxbitmap_cleanup(dev);
 593
 594         if (dev->driver->driver_features & DRIVER_GEM)
 595                 drm_gem_destroy(dev);
 596
 597         if (dev->agp && dev->agp->mtrr) {
 598                 int __unused retcode;
 599
 600                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
 601                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
 602                 DRM_DEBUG("mtrr_del = %d", retcode);
 603         }
 604
 605         drm_vblank_cleanup(dev);
 606
 607         DRM_LOCK(dev);
 608         drm_lastclose(dev);
 609         DRM_UNLOCK(dev);
 610
 611         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 612          * worried about resource consumption while the DRM is inactive (between
 613          * lastclose and firstopen or unload) because these aren't actually
 614          * taking up KVA, just keeping the PCI resource allocated.
 615          */
 616         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 617                 if (dev->pcir[i] == NULL)
 618                         continue;
 619                 bus_release_resource(dev->device, SYS_RES_MEMORY,
 620                     dev->pcirid[i], dev->pcir[i]);
 621                 dev->pcir[i] = NULL;
 622         }
 623
 624         if (dev->agp) {
 625                 free(dev->agp, DRM_MEM_AGPLISTS);
 626                 dev->agp = NULL;
 627         }
 628
 629         if (dev->driver->unload != NULL) {
 630                 DRM_LOCK(dev);
 631                 dev->driver->unload(dev);
 632                 DRM_UNLOCK(dev);
 633         }
 634
 635         delete_unrhdr(dev->drw_unrhdr);
 636         delete_unrhdr(dev->map_unrhdr);
 637
 638         drm_mem_uninit();
 639
 640         if (pci_disable_busmaster(dev->device))
 641                 DRM_ERROR("Request to disable bus-master failed.\n");
 642
 643         DRM_SPINUNINIT(&dev->drw_lock);
 644         lockuninit(&dev->vbl_lock);
 645         lockuninit(&dev->dev_lock);
 646         lockuninit(&dev->event_lock);
 647         lockuninit(&dev->dev_struct_lock);
 648 }
 649
 650 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 651 {
 652         struct drm_version *version = data;
 653         int len;
 654
 655 #define DRM_COPY( name, value )                                         \
 656         len = strlen( value );                                          \
 657         if ( len > name##_len ) len = name##_len;                       \
 658         name##_len = strlen( value );                                   \
 659         if ( len && name ) {                                            \
 660                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 661                         return EFAULT;                          \
 662         }
 663
 664         version->version_major          = dev->driver->major;
 665         version->version_minor          = dev->driver->minor;
 666         version->version_patchlevel     = dev->driver->patchlevel;
 667
 668         DRM_COPY(version->name, dev->driver->name);
 669         DRM_COPY(version->date, dev->driver->date);
 670         DRM_COPY(version->desc, dev->driver->desc);
 671
 672         return 0;
 673 }
 674
 675 int
 676 /* drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p) */
 677 drm_open(struct dev_open_args *ap)
 678 {
 679         struct cdev *kdev = ap->a_head.a_dev;
 680         int flags = ap->a_oflags;
 681         int fmt = 0;
 682         struct thread *p = curthread;
 683         struct drm_device *dev;
 684         int retcode;
 685
 686         dev = DRIVER_SOFTC(minor(kdev));
 687         if (dev == NULL)
 688                 return (ENXIO);
 689
 690         DRM_DEBUG("open_count = %d\n", dev->open_count);
 691
 692         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
 693
 694         if (retcode == 0) {
 695                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 696                 DRM_LOCK(dev);
 697                 device_busy(dev->device);
 698                 if (!dev->open_count++)
 699                         retcode = drm_firstopen(dev);
 700                 DRM_UNLOCK(dev);
 701         }
 702
 703         DRM_DEBUG("return %d\n", retcode);
 704
 705         return (retcode);
 706 }
 707
 708 int drm_close(struct dev_close_args *ap)
 709 {
 710         struct cdev *kdev = ap->a_head.a_dev;
 711         struct drm_file *file_priv;
 712         struct drm_device *dev;
 713         int retcode = 0;
 714
 715         dev = DRIVER_SOFTC(minor(kdev));
 716         file_priv = drm_find_file_by_proc(dev, curthread);
 717
 718         DRM_DEBUG("open_count = %d\n", dev->open_count);
 719
 720         DRM_LOCK(dev);
 721
 722         if (dev->driver->preclose != NULL)
 723                 dev->driver->preclose(dev, file_priv);
 724
 725         /* ========================================================
 726          * Begin inline drm_release
 727          */
 728
 729         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 730             DRM_CURRENTPID, (long)dev->device, dev->open_count);
 731
 732         if (dev->driver->driver_features & DRIVER_GEM)
 733                 drm_gem_release(dev, file_priv);
 734
 735         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 736             && dev->lock.file_priv == file_priv) {
 737                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 738                           DRM_CURRENTPID,
 739                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 740                 if (dev->driver->reclaim_buffers_locked != NULL)
 741                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 742
 743                 drm_lock_free(&dev->lock,
 744                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 745
 746                                 /* FIXME: may require heavy-handed reset of
 747                                    hardware at this point, possibly
 748                                    processed via a callback to the X
 749                                    server. */
 750         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 751             dev->lock.hw_lock != NULL) {
 752                 /* The lock is required to reclaim buffers */
 753                 for (;;) {
 754                         if (!dev->lock.hw_lock) {
 755                                 /* Device has been unregistered */
 756                                 retcode = EINTR;
 757                                 break;
 758                         }
 759                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 760                                 dev->lock.file_priv = file_priv;
 761                                 dev->lock.lock_time = jiffies;
 762                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 763                                 break;  /* Got lock */
 764                         }
 765                         /* Contention */
 766                         retcode = DRM_LOCK_SLEEP(dev, &dev->lock.lock_queue,
 767                             PCATCH, "drmlk2", 0);
 768                         if (retcode)
 769                                 break;
 770                 }
 771                 if (retcode == 0) {
 772                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 773                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 774                 }
 775         }
 776
 777         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 778             !dev->driver->reclaim_buffers_locked)
 779                 drm_reclaim_buffers(dev, file_priv);
 780
 781         funsetown(&dev->buf_sigio);
 782
 783         if (dev->driver->postclose != NULL)
 784                 dev->driver->postclose(dev, file_priv);
 785         TAILQ_REMOVE(&dev->files, file_priv, link);
 786         free(file_priv, DRM_MEM_FILES);
 787
 788         /* ========================================================
 789          * End inline drm_release
 790          */
 791
 792         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 793         device_unbusy(dev->device);
 794         if (--dev->open_count == 0) {
 795                 retcode = drm_lastclose(dev);
 796         }
 797
 798         DRM_UNLOCK(dev);
 799
 800         return (0);
 801 }
 802
 803 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 804  */
 805 int drm_ioctl(struct dev_ioctl_args *ap)
 806 {
 807         struct cdev *kdev = ap->a_head.a_dev;
 808         u_long cmd = ap->a_cmd;
 809         caddr_t data = ap->a_data;
 810         struct thread *p = curthread;
 811         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 812         int retcode = 0;
 813         drm_ioctl_desc_t *ioctl;
 814         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 815         int nr = DRM_IOCTL_NR(cmd);
 816         int is_driver_ioctl = 0;
 817         struct drm_file *file_priv;
 818
 819         file_priv = drm_find_file_by_proc(dev, p);
 820
 821         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 822         ++file_priv->ioctl_count;
 823
 824         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 825             DRM_CURRENTPID, cmd, nr, (long)dev->device,
 826             file_priv->authenticated);
 827
 828         switch (cmd) {
 829         case FIONBIO:
 830         case FIOASYNC:
 831                 return 0;
 832
 833         case FIOSETOWN:
 834                 return fsetown(*(int *)data, &dev->buf_sigio);
 835
 836         case FIOGETOWN:
 837                 *(int *) data = fgetown(&dev->buf_sigio);
 838                 return 0;
 839         }
 840
 841         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 842                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 843                 return EINVAL;
 844         }
 845
 846         ioctl = &drm_ioctls[nr];
 847         /* It's not a core DRM ioctl, try driver-specific. */
 848         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 849                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 850                 nr -= DRM_COMMAND_BASE;
 851                 if (nr > dev->driver->max_ioctl) {
 852                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 853                             nr, dev->driver->max_ioctl);
 854                         return EINVAL;
 855                 }
 856                 ioctl = &dev->driver->ioctls[nr];
 857                 is_driver_ioctl = 1;
 858         }
 859         func = ioctl->func;
 860
 861         if (func == NULL) {
 862                 DRM_DEBUG("no function\n");
 863                 return EINVAL;
 864         }
 865
 866         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 867             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 868             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 869                 return EACCES;
 870
 871         if (is_driver_ioctl) {
 872                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 873                         DRM_LOCK(dev);
 874                 /* shared code returns -errno */
 875                 retcode = -func(dev, data, file_priv);
 876                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 877                         DRM_UNLOCK(dev);
 878         } else {
 879                 retcode = func(dev, data, file_priv);
 880         }
 881
 882         if (retcode != 0)
 883                 DRM_DEBUG("    returning %d\n", retcode);
 884         if (retcode != 0 &&
 885             (drm_debug_flag & DRM_DEBUGBITS_FAILED_IOCTL) != 0) {
 886                 kprintf(
 887 "pid %d, cmd 0x%02lx, nr 0x%02x/%1d, dev 0x%lx, auth %d, res %d\n",
 888                     DRM_CURRENTPID, cmd, nr, is_driver_ioctl, (long)dev->device,
 889                     file_priv->authenticated, retcode);
 890         }
 891
 892         return retcode;
 893 }
 894
 895 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 896 {
 897         drm_local_map_t *map;
 898
 899         DRM_LOCK_ASSERT(dev);
 900         TAILQ_FOREACH(map, &dev->maplist, link) {
 901                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
 902                         return map;
 903         }
 904
 905         return NULL;
 906 }
 907
 908 int
 909 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 910     struct sysctl_oid *top)
 911 {
 912         struct sysctl_oid *oid;
 913
 914         ksnprintf(dev->busid_str, sizeof(dev->busid_str),
 915              "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus,
 916              dev->pci_slot, dev->pci_func);
 917         oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid",
 918             CTLFLAG_RD, dev->busid_str, 0, NULL);
 919         if (oid == NULL)
 920                 return (ENOMEM);
 921         dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0;
 922         oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO,
 923             "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL);
 924         if (oid == NULL)
 925                 return (ENOMEM);
 926
 927         return (0);
 928 }
 929
 930 #if DRM_LINUX
 931
 932 #include <sys/sysproto.h>
 933
 934 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 935
 936 #define LINUX_IOCTL_DRM_MIN             0x6400
 937 #define LINUX_IOCTL_DRM_MAX             0x64ff
 938
 939 static linux_ioctl_function_t drm_linux_ioctl;
 940 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 941     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 942
 943 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
 944     linux_ioctl_register_handler, &drm_handler);
 945 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
 946     linux_ioctl_unregister_handler, &drm_handler);
 947
 948 /* The bits for in/out are switched on Linux */
 949 #define LINUX_IOC_IN    IOC_OUT
 950 #define LINUX_IOC_OUT   IOC_IN
 951
 952 static int
 953 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 954 {
 955         int error;
 956         int cmd = args->cmd;
 957
 958         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 959         if (cmd & LINUX_IOC_IN)
 960                 args->cmd |= IOC_IN;
 961         if (cmd & LINUX_IOC_OUT)
 962                 args->cmd |= IOC_OUT;
 963
 964         error = ioctl(p, (struct ioctl_args *)args);
 965
 966         return error;
 967 }
 968 #endif /* DRM_LINUX */
 969
 970 bool
 971 dmi_check_system(const struct dmi_system_id *sysid)
 972 {
 973
 974         /* XXXKIB */
 975         return (false);
 976 }
 977