sys/dev/drm/drm_drv.c

   1 /*-
   2  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
   3  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rickard E. (Rik) Faith <faith@valinux.com>
  27  *    Gareth Hughes <gareth@valinux.com>
  28  *
  29  * $FreeBSD: head/sys/dev/drm2/drm_drv.c 247835 2013-03-05 09:49:34Z kib $
  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 #include <sys/devfs.h>
  38 #include <machine/limits.h>
  39
  40 #include "dev/drm/drmP.h"
  41 #include "dev/drm/drm.h"
  42 #include "dev/drm/drm_sarea.h"
  43
  44 #ifdef DRM_DEBUG_DEFAULT_ON
  45 int drm_debug_flag = (DRM_DEBUGBITS_DEBUG | DRM_DEBUGBITS_KMS |
  46     DRM_DEBUGBITS_FAILED_IOCTL);
  47 #else
  48 int drm_debug_flag = 0;
  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         "drm",
  78         drm_modevent,
  79         0
  80 };
  81 DECLARE_MODULE(drm, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
  82 MODULE_VERSION(drm, 1);
  83 MODULE_DEPEND(drm, agp, 1, 1, 1);
  84 MODULE_DEPEND(drm, pci, 1, 1, 1);
  85 MODULE_DEPEND(drm, 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                 return ENXIO;
 231
 232         id_entry = drm_find_description(vendor, device, idlist);
 233         if (id_entry != NULL) {
 234                 if (!device_get_desc(kdev)) {
 235                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 236                         device_set_desc(kdev, id_entry->name);
 237                 }
 238                 return 0;
 239         }
 240
 241         return ENXIO;
 242 }
 243
 244 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 245 {
 246         struct drm_device *dev;
 247         drm_pci_id_list_t *id_entry;
 248         int unit, msicount;
 249         int rid = 0;
 250
 251         unit = device_get_unit(kdev);
 252         dev = device_get_softc(kdev);
 253
 254         if (!strcmp(device_get_name(kdev), "drmsub"))
 255                 dev->device = device_get_parent(kdev);
 256         else
 257                 dev->device = kdev;
 258
 259         dev->devnode = make_dev(&drm_cdevsw, unit, DRM_DEV_UID, DRM_DEV_GID,
 260                                 DRM_DEV_MODE, "dri/card%d", unit);
 261
 262         dev->pci_domain = 0;
 263         dev->pci_bus = pci_get_bus(dev->device);
 264         dev->pci_slot = pci_get_slot(dev->device);
 265         dev->pci_func = pci_get_function(dev->device);
 266
 267         dev->pci_vendor = pci_get_vendor(dev->device);
 268         dev->pci_device = pci_get_device(dev->device);
 269
 270         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 271                 if (drm_msi &&
 272                     !drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
 273                         msicount = pci_msi_count(dev->device);
 274                         DRM_DEBUG("MSI count = %d\n", msicount);
 275                         if (msicount > 1)
 276                                 msicount = 1;
 277
 278                         if (pci_alloc_msi(dev->device, &rid, msicount, -1) == 0) {
 279                                 DRM_INFO("MSI enabled %d message(s)\n",
 280                                     msicount);
 281                                 dev->msi_enabled = 1;
 282                                 dev->irqrid = rid;
 283                         }
 284                 }
 285
 286                 dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
 287                     &dev->irqrid, RF_SHAREABLE);
 288                 if (!dev->irqr) {
 289                         return (ENOENT);
 290                 }
 291
 292                 dev->irq = (int) rman_get_start(dev->irqr);
 293         }
 294
 295         lockinit(&dev->dev_lock, "drmdev", 0, LK_CANRECURSE);
 296         lwkt_serialize_init(&dev->irq_lock);
 297         lockinit(&dev->vbl_lock, "drmvbl", 0, LK_CANRECURSE);
 298         spin_init(&dev->drw_lock);
 299         lockinit(&dev->event_lock, "drmev", 0, LK_CANRECURSE);
 300         lockinit(&dev->dev_struct_lock, "drmslk", 0, LK_CANRECURSE);
 301
 302         id_entry = drm_find_description(dev->pci_vendor,
 303             dev->pci_device, idlist);
 304         dev->id_entry = id_entry;
 305
 306         return drm_load(dev);
 307 }
 308
 309 int drm_detach(device_t kdev)
 310 {
 311         struct drm_device *dev;
 312
 313         dev = device_get_softc(kdev);
 314         drm_unload(dev);
 315         if (dev->irqr) {
 316                 bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid,
 317                     dev->irqr);
 318                 if (dev->msi_enabled) {
 319                         pci_release_msi(dev->device);
 320                         DRM_INFO("MSI released\n");
 321                 }
 322         }
 323         return (0);
 324 }
 325
 326 #ifndef DRM_DEV_NAME
 327 #define DRM_DEV_NAME "drm"
 328 #endif
 329
 330 devclass_t drm_devclass;
 331
 332 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 333     drm_pci_id_list_t *idlist)
 334 {
 335         int i = 0;
 336
 337         for (i = 0; idlist[i].vendor != 0; i++) {
 338                 if ((idlist[i].vendor == vendor) &&
 339                     ((idlist[i].device == device) ||
 340                     (idlist[i].device == 0))) {
 341                         return &idlist[i];
 342                 }
 343         }
 344         return NULL;
 345 }
 346
 347 static int drm_firstopen(struct drm_device *dev)
 348 {
 349         drm_local_map_t *map;
 350         int i;
 351
 352         DRM_LOCK_ASSERT(dev);
 353
 354         /* prebuild the SAREA */
 355         i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
 356             _DRM_CONTAINS_LOCK, &map);
 357         if (i != 0)
 358                 return i;
 359
 360         if (dev->driver->firstopen)
 361                 dev->driver->firstopen(dev);
 362
 363         dev->buf_use = 0;
 364
 365         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
 366                 i = drm_dma_setup(dev);
 367                 if (i != 0)
 368                         return i;
 369         }
 370
 371         for (i = 0; i < DRM_HASH_SIZE; i++) {
 372                 dev->magiclist[i].head = NULL;
 373                 dev->magiclist[i].tail = NULL;
 374         }
 375
 376         dev->lock.lock_queue = 0;
 377         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 378                 dev->irq_enabled = 0;
 379         dev->context_flag = 0;
 380         dev->last_context = 0;
 381         dev->if_version = 0;
 382
 383         dev->buf_sigio = NULL;
 384
 385         DRM_DEBUG("\n");
 386
 387         return 0;
 388 }
 389
 390 static int drm_lastclose(struct drm_device *dev)
 391 {
 392         drm_magic_entry_t *pt, *next;
 393         drm_local_map_t *map, *mapsave;
 394         int i;
 395
 396         DRM_LOCK_ASSERT(dev);
 397
 398         DRM_DEBUG("\n");
 399
 400         if (dev->driver->lastclose != NULL)
 401                 dev->driver->lastclose(dev);
 402
 403         if (!drm_core_check_feature(dev, DRIVER_MODESET) && dev->irq_enabled)
 404                 drm_irq_uninstall(dev);
 405
 406         if (dev->unique) {
 407                 drm_free(dev->unique, DRM_MEM_DRIVER);
 408                 dev->unique = NULL;
 409                 dev->unique_len = 0;
 410         }
 411         /* Clear pid list */
 412         for (i = 0; i < DRM_HASH_SIZE; i++) {
 413                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 414                         next = pt->next;
 415                         drm_free(pt, DRM_MEM_MAGIC);
 416                 }
 417                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 418         }
 419
 420         DRM_UNLOCK(dev);
 421         drm_drawable_free_all(dev);
 422         DRM_LOCK(dev);
 423
 424         /* Clear AGP information */
 425         if (dev->agp) {
 426                 drm_agp_mem_t *entry;
 427                 drm_agp_mem_t *nexte;
 428
 429                 /* Remove AGP resources, but leave dev->agp intact until
 430                  * drm_unload is called.
 431                  */
 432                 for (entry = dev->agp->memory; entry; entry = nexte) {
 433                         nexte = entry->next;
 434                         if (entry->bound)
 435                                 drm_agp_unbind_memory(entry->handle);
 436                         drm_agp_free_memory(entry->handle);
 437                         drm_free(entry, DRM_MEM_AGPLISTS);
 438                 }
 439                 dev->agp->memory = NULL;
 440
 441                 if (dev->agp->acquired)
 442                         drm_agp_release(dev);
 443
 444                 dev->agp->acquired = 0;
 445                 dev->agp->enabled  = 0;
 446         }
 447         if (dev->sg != NULL) {
 448                 drm_sg_cleanup(dev->sg);
 449                 dev->sg = NULL;
 450         }
 451
 452         TAILQ_FOREACH_MUTABLE(map, &dev->maplist, link, mapsave) {
 453                 if (!(map->flags & _DRM_DRIVER))
 454                         drm_rmmap(dev, map);
 455         }
 456
 457         drm_dma_takedown(dev);
 458         if (dev->lock.hw_lock) {
 459                 dev->lock.hw_lock = NULL; /* SHM removed */
 460                 dev->lock.file_priv = NULL;
 461                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 462         }
 463
 464         return 0;
 465 }
 466
 467 static int drm_load(struct drm_device *dev)
 468 {
 469         int i, retcode;
 470
 471         DRM_DEBUG("\n");
 472
 473         TAILQ_INIT(&dev->maplist);
 474         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 475         if (dev->map_unrhdr == NULL) {
 476                 DRM_ERROR("Couldn't allocate map number allocator\n");
 477                 return EINVAL;
 478         }
 479
 480
 481         drm_mem_init();
 482         drm_sysctl_init(dev);
 483         TAILQ_INIT(&dev->files);
 484
 485         dev->counters  = 6;
 486         dev->types[0]  = _DRM_STAT_LOCK;
 487         dev->types[1]  = _DRM_STAT_OPENS;
 488         dev->types[2]  = _DRM_STAT_CLOSES;
 489         dev->types[3]  = _DRM_STAT_IOCTLS;
 490         dev->types[4]  = _DRM_STAT_LOCKS;
 491         dev->types[5]  = _DRM_STAT_UNLOCKS;
 492
 493         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 494                 atomic_set(&dev->counts[i], 0);
 495
 496         INIT_LIST_HEAD(&dev->vblank_event_list);
 497
 498         if (drm_core_has_AGP(dev)) {
 499                 if (drm_device_is_agp(dev))
 500                         dev->agp = drm_agp_init();
 501                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 502                     dev->agp == NULL) {
 503                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 504                             "AGP.\n");
 505                         retcode = ENOMEM;
 506                         goto error;
 507                 }
 508                 if (dev->agp != NULL && dev->agp->info.ai_aperture_base != 0) {
 509                         if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
 510                             dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
 511                                 dev->agp->mtrr = 1;
 512                 }
 513         }
 514
 515         retcode = drm_ctxbitmap_init(dev);
 516         if (retcode != 0) {
 517                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 518                 goto error;
 519         }
 520
 521         dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
 522         if (dev->drw_unrhdr == NULL) {
 523                 DRM_ERROR("Couldn't allocate drawable number allocator\n");
 524                 retcode = ENOMEM;
 525                 goto error;
 526         }
 527
 528         if (dev->driver->driver_features & DRIVER_GEM) {
 529                 retcode = drm_gem_init(dev);
 530                 if (retcode != 0) {
 531                         DRM_ERROR("Cannot initialize graphics execution "
 532                                   "manager (GEM)\n");
 533                         goto error1;
 534                 }
 535         }
 536
 537         if (dev->driver->load != NULL) {
 538                 DRM_LOCK(dev);
 539                 /* Shared code returns -errno. */
 540                 retcode = -dev->driver->load(dev,
 541                     dev->id_entry->driver_private);
 542                 if (pci_enable_busmaster(dev->device))
 543                         DRM_ERROR("Request to enable bus-master failed.\n");
 544                 DRM_UNLOCK(dev);
 545                 if (retcode != 0)
 546                         goto error;
 547         }
 548
 549         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 550             dev->driver->name,
 551             dev->driver->major,
 552             dev->driver->minor,
 553             dev->driver->patchlevel,
 554             dev->driver->date);
 555
 556         return 0;
 557
 558 error1:
 559         delete_unrhdr(dev->drw_unrhdr);
 560 error:
 561         drm_sysctl_cleanup(dev);
 562         DRM_LOCK(dev);
 563         drm_lastclose(dev);
 564         DRM_UNLOCK(dev);
 565         if (dev->devnode != NULL)
 566                 destroy_dev(dev->devnode);
 567
 568         spin_uninit(&dev->drw_lock);
 569         lockuninit(&dev->vbl_lock);
 570         lockuninit(&dev->dev_lock);
 571         lockuninit(&dev->event_lock);
 572         lockuninit(&dev->dev_struct_lock);
 573
 574         return retcode;
 575 }
 576
 577 static void drm_unload(struct drm_device *dev)
 578 {
 579         int i;
 580
 581         DRM_DEBUG("\n");
 582
 583         drm_sysctl_cleanup(dev);
 584         if (dev->devnode != NULL)
 585                 destroy_dev(dev->devnode);
 586
 587         drm_ctxbitmap_cleanup(dev);
 588
 589         if (dev->driver->driver_features & DRIVER_GEM)
 590                 drm_gem_destroy(dev);
 591
 592         if (dev->agp && dev->agp->mtrr) {
 593                 int __unused retcode;
 594
 595                 retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
 596                     dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
 597                 DRM_DEBUG("mtrr_del = %d", retcode);
 598         }
 599
 600         drm_vblank_cleanup(dev);
 601
 602         DRM_LOCK(dev);
 603         drm_lastclose(dev);
 604         DRM_UNLOCK(dev);
 605
 606         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 607          * worried about resource consumption while the DRM is inactive (between
 608          * lastclose and firstopen or unload) because these aren't actually
 609          * taking up KVA, just keeping the PCI resource allocated.
 610          */
 611         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 612                 if (dev->pcir[i] == NULL)
 613                         continue;
 614                 bus_release_resource(dev->device, SYS_RES_MEMORY,
 615                     dev->pcirid[i], dev->pcir[i]);
 616                 dev->pcir[i] = NULL;
 617         }
 618
 619         if (dev->agp) {
 620                 drm_free(dev->agp, DRM_MEM_AGPLISTS);
 621                 dev->agp = NULL;
 622         }
 623
 624         if (dev->driver->unload != NULL) {
 625                 DRM_LOCK(dev);
 626                 dev->driver->unload(dev);
 627                 DRM_UNLOCK(dev);
 628         }
 629
 630         delete_unrhdr(dev->drw_unrhdr);
 631         delete_unrhdr(dev->map_unrhdr);
 632
 633         drm_mem_uninit();
 634
 635         if (pci_disable_busmaster(dev->device))
 636                 DRM_ERROR("Request to disable bus-master failed.\n");
 637
 638         spin_uninit(&dev->drw_lock);
 639         lockuninit(&dev->vbl_lock);
 640         lockuninit(&dev->dev_lock);
 641         lockuninit(&dev->event_lock);
 642         lockuninit(&dev->dev_struct_lock);
 643 }
 644
 645 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 646 {
 647         struct drm_version *version = data;
 648         int len;
 649
 650 #define DRM_COPY( name, value )                                         \
 651         len = strlen( value );                                          \
 652         if ( len > name##_len ) len = name##_len;                       \
 653         name##_len = strlen( value );                                   \
 654         if ( len && name ) {                                            \
 655                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 656                         return EFAULT;                          \
 657         }
 658
 659         version->version_major          = dev->driver->major;
 660         version->version_minor          = dev->driver->minor;
 661         version->version_patchlevel     = dev->driver->patchlevel;
 662
 663         DRM_COPY(version->name, dev->driver->name);
 664         DRM_COPY(version->date, dev->driver->date);
 665         DRM_COPY(version->desc, dev->driver->desc);
 666
 667         return 0;
 668 }
 669
 670 int
 671 /* drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p) */
 672 drm_open(struct dev_open_args *ap)
 673 {
 674         struct cdev *kdev = ap->a_head.a_dev;
 675         int flags = ap->a_oflags;
 676         int fmt = 0;
 677         struct thread *p = curthread;
 678         struct drm_device *dev;
 679         int retcode;
 680
 681         dev = DRIVER_SOFTC(minor(kdev));
 682         if (dev == NULL)
 683                 return (ENXIO);
 684
 685         DRM_DEBUG("open_count = %d\n", dev->open_count);
 686
 687         retcode = drm_open_helper(kdev, flags, fmt, p, dev);
 688
 689         if (retcode == 0) {
 690                 atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 691                 DRM_LOCK(dev);
 692                 device_busy(dev->device);
 693                 if (!dev->open_count++)
 694                         retcode = drm_firstopen(dev);
 695                 DRM_UNLOCK(dev);
 696         }
 697
 698         DRM_DEBUG("return %d\n", retcode);
 699
 700         return (retcode);
 701 }
 702
 703 int drm_close(struct dev_close_args *ap)
 704 {
 705         struct cdev *kdev = ap->a_head.a_dev;
 706         struct drm_file *file_priv;
 707         struct drm_device *dev;
 708         int retcode = 0;
 709
 710         dev = DRIVER_SOFTC(minor(kdev));
 711         file_priv = drm_find_file_by_proc(dev, curthread);
 712
 713         DRM_DEBUG("open_count = %d\n", dev->open_count);
 714
 715         DRM_LOCK(dev);
 716
 717         if (dev->driver->preclose != NULL)
 718                 dev->driver->preclose(dev, file_priv);
 719
 720         /* ========================================================
 721          * Begin inline drm_release
 722          */
 723
 724         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 725             DRM_CURRENTPID, (long)dev->device, dev->open_count);
 726
 727         if (dev->driver->driver_features & DRIVER_GEM)
 728                 drm_gem_release(dev, file_priv);
 729
 730         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 731             && dev->lock.file_priv == file_priv) {
 732                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 733                           DRM_CURRENTPID,
 734                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 735                 if (dev->driver->reclaim_buffers_locked != NULL)
 736                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 737
 738                 drm_lock_free(&dev->lock,
 739                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 740
 741                                 /* FIXME: may require heavy-handed reset of
 742                                    hardware at this point, possibly
 743                                    processed via a callback to the X
 744                                    server. */
 745         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 746             dev->lock.hw_lock != NULL) {
 747                 /* The lock is required to reclaim buffers */
 748                 for (;;) {
 749                         if (!dev->lock.hw_lock) {
 750                                 /* Device has been unregistered */
 751                                 retcode = EINTR;
 752                                 break;
 753                         }
 754                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 755                                 dev->lock.file_priv = file_priv;
 756                                 dev->lock.lock_time = jiffies;
 757                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 758                                 break;  /* Got lock */
 759                         }
 760                         /* Contention */
 761                         retcode = DRM_LOCK_SLEEP(dev, &dev->lock.lock_queue,
 762                             PCATCH, "drmlk2", 0);
 763                         if (retcode)
 764                                 break;
 765                 }
 766                 if (retcode == 0) {
 767                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 768                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 769                 }
 770         }
 771
 772         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 773             !dev->driver->reclaim_buffers_locked)
 774                 drm_reclaim_buffers(dev, file_priv);
 775
 776         funsetown(&dev->buf_sigio);
 777
 778         if (dev->driver->postclose != NULL)
 779                 dev->driver->postclose(dev, file_priv);
 780         TAILQ_REMOVE(&dev->files, file_priv, link);
 781         drm_free(file_priv, DRM_MEM_FILES);
 782
 783         /* ========================================================
 784          * End inline drm_release
 785          */
 786
 787         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 788         device_unbusy(dev->device);
 789         if (--dev->open_count == 0) {
 790                 retcode = drm_lastclose(dev);
 791         }
 792
 793         DRM_UNLOCK(dev);
 794
 795         return (0);
 796 }
 797
 798 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 799  */
 800 int drm_ioctl(struct dev_ioctl_args *ap)
 801 {
 802         struct cdev *kdev = ap->a_head.a_dev;
 803         u_long cmd = ap->a_cmd;
 804         caddr_t data = ap->a_data;
 805         struct thread *p = curthread;
 806         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 807         int retcode = 0;
 808         drm_ioctl_desc_t *ioctl;
 809         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 810         int nr = DRM_IOCTL_NR(cmd);
 811         int is_driver_ioctl = 0;
 812         struct drm_file *file_priv;
 813
 814         file_priv = drm_find_file_by_proc(dev, p);
 815
 816         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 817         ++file_priv->ioctl_count;
 818
 819         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 820             DRM_CURRENTPID, cmd, nr, (long)dev->device,
 821             file_priv->authenticated);
 822
 823         switch (cmd) {
 824         case FIONBIO:
 825         case FIOASYNC:
 826                 return 0;
 827
 828         case FIOSETOWN:
 829                 return fsetown(*(int *)data, &dev->buf_sigio);
 830
 831         case FIOGETOWN:
 832                 *(int *) data = fgetown(&dev->buf_sigio);
 833                 return 0;
 834         }
 835
 836         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 837                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 838                 return EINVAL;
 839         }
 840
 841         ioctl = &drm_ioctls[nr];
 842         /* It's not a core DRM ioctl, try driver-specific. */
 843         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 844                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 845                 nr -= DRM_COMMAND_BASE;
 846                 if (nr > dev->driver->max_ioctl) {
 847                         DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 848                             nr, dev->driver->max_ioctl);
 849                         return EINVAL;
 850                 }
 851                 ioctl = &dev->driver->ioctls[nr];
 852                 is_driver_ioctl = 1;
 853         }
 854         func = ioctl->func;
 855
 856         if (func == NULL) {
 857                 DRM_DEBUG("no function\n");
 858                 return EINVAL;
 859         }
 860
 861         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 862             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 863             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 864                 return EACCES;
 865
 866         if (is_driver_ioctl) {
 867                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 868                         DRM_LOCK(dev);
 869                 /* shared code returns -errno */
 870                 retcode = -func(dev, data, file_priv);
 871                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 872                         DRM_UNLOCK(dev);
 873         } else {
 874                 retcode = func(dev, data, file_priv);
 875         }
 876
 877         if (retcode != 0)
 878                 DRM_DEBUG("    returning %d\n", retcode);
 879         if (retcode != 0 &&
 880             (drm_debug_flag & DRM_DEBUGBITS_FAILED_IOCTL) != 0) {
 881                 kprintf(
 882 "pid %d, cmd 0x%02lx, nr 0x%02x/%1d, dev 0x%lx, auth %d, res %d\n",
 883                     DRM_CURRENTPID, cmd, nr, is_driver_ioctl, (long)dev->device,
 884                     file_priv->authenticated, retcode);
 885         }
 886
 887         return retcode;
 888 }
 889
 890 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 891 {
 892         drm_local_map_t *map;
 893
 894         DRM_LOCK_ASSERT(dev);
 895         TAILQ_FOREACH(map, &dev->maplist, link) {
 896                 if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
 897                         return map;
 898         }
 899
 900         return NULL;
 901 }
 902
 903 int
 904 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 905     struct sysctl_oid *top)
 906 {
 907         struct sysctl_oid *oid;
 908
 909         ksnprintf(dev->busid_str, sizeof(dev->busid_str),
 910              "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus,
 911              dev->pci_slot, dev->pci_func);
 912         oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid",
 913             CTLFLAG_RD, dev->busid_str, 0, NULL);
 914         if (oid == NULL)
 915                 return (ENOMEM);
 916         dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0;
 917         oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO,
 918             "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL);
 919         if (oid == NULL)
 920                 return (ENOMEM);
 921
 922         return (0);
 923 }
 924
 925 int
 926 drm_mmap_single(struct dev_mmap_single_args *ap)
 927 {
 928         struct drm_device *dev;
 929         struct cdev *kdev = ap->a_head.a_dev;
 930         vm_ooffset_t *offset = ap->a_offset;
 931         vm_size_t size = ap->a_size;
 932         struct vm_object **obj_res = ap->a_object;
 933         int nprot = ap->a_nprot;
 934
 935         dev = drm_get_device_from_kdev(kdev);
 936         if ((dev->driver->driver_features & DRIVER_GEM) != 0) {
 937                 return (drm_gem_mmap_single(dev, offset, size, obj_res, nprot));
 938         } else if (dev->drm_ttm_bo != NULL) {
 939                 return (ttm_bo_mmap_single(dev->drm_ttm_bo, offset, size,
 940                     obj_res, nprot));
 941         } else {
 942                 return (ENODEV);
 943         }
 944 }
 945
 946 #if DRM_LINUX
 947
 948 #include <sys/sysproto.h>
 949
 950 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 951
 952 #define LINUX_IOCTL_DRM_MIN             0x6400
 953 #define LINUX_IOCTL_DRM_MAX             0x64ff
 954
 955 static linux_ioctl_function_t drm_linux_ioctl;
 956 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 957     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 958
 959 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
 960     linux_ioctl_register_handler, &drm_handler);
 961 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
 962     linux_ioctl_unregister_handler, &drm_handler);
 963
 964 /* The bits for in/out are switched on Linux */
 965 #define LINUX_IOC_IN    IOC_OUT
 966 #define LINUX_IOC_OUT   IOC_IN
 967
 968 static int
 969 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 970 {
 971         int error;
 972         int cmd = args->cmd;
 973
 974         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 975         if (cmd & LINUX_IOC_IN)
 976                 args->cmd |= IOC_IN;
 977         if (cmd & LINUX_IOC_OUT)
 978                 args->cmd |= IOC_OUT;
 979
 980         error = ioctl(p, (struct ioctl_args *)args);
 981
 982         return error;
 983 }
 984 #endif /* DRM_LINUX */
 985
 986 /*
 987  * Check if dmi_system_id structure matches system DMI data
 988  */
 989 static bool
 990 dmi_found(const struct dmi_system_id *dsi)
 991 {
 992         int i, slot;
 993         bool found = false;
 994         char *sys_vendor, *board_vendor, *product_name, *board_name;
 995
 996         sys_vendor = kgetenv("smbios.system.maker");
 997         board_vendor = kgetenv("smbios.planar.maker");
 998         product_name = kgetenv("smbios.system.product");
 999         board_name = kgetenv("smbios.planar.product");
1000
1001         for (i = 0; i < NELEM(dsi->matches); i++) {
1002                 slot = dsi->matches[i].slot;
1003                 switch (slot) {
1004                 case DMI_NONE:
1005                         break;
1006                 case DMI_SYS_VENDOR:
1007                         if (sys_vendor != NULL &&
1008                             !strcmp(sys_vendor, dsi->matches[i].substr))
1009                                 break;
1010                         else
1011                                 goto done;
1012                 case DMI_BOARD_VENDOR:
1013                         if (board_vendor != NULL &&
1014                             !strcmp(board_vendor, dsi->matches[i].substr))
1015                                 break;
1016                         else
1017                                 goto done;
1018                 case DMI_PRODUCT_NAME:
1019                         if (product_name != NULL &&
1020                             !strcmp(product_name, dsi->matches[i].substr))
1021                                 break;
1022                         else
1023                                 goto done;
1024                 case DMI_BOARD_NAME:
1025                         if (board_name != NULL &&
1026                             !strcmp(board_name, dsi->matches[i].substr))
1027                                 break;
1028                         else
1029                                 goto done;
1030                 default:
1031                         goto done;
1032                 }
1033         }
1034         found = true;
1035
1036 done:
1037         if (sys_vendor != NULL)
1038                 kfreeenv(sys_vendor);
1039         if (board_vendor != NULL)
1040                 kfreeenv(board_vendor);
1041         if (product_name != NULL)
1042                 kfreeenv(product_name);
1043         if (board_name != NULL)
1044                 kfreeenv(board_name);
1045
1046         return found;
1047 }
1048
1049 bool
1050 dmi_check_system(const struct dmi_system_id *sysid)
1051 {
1052         const struct dmi_system_id *dsi;
1053         int num = 0;
1054
1055         for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) {
1056                 if (dmi_found(dsi)) {
1057                         num++;
1058                         if (dsi->callback && dsi->callback(dsi))
1059                                 break;
1060                 }
1061         }
1062         return (num);
1063 }
1064