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 <drm/drmP.h>
  41 #include <drm/drm_core.h>
  42
  43 #ifdef DRM_DEBUG_DEFAULT_ON
  44 int drm_debug = (DRM_DEBUGBITS_DEBUG | DRM_DEBUGBITS_KMS |
  45     DRM_DEBUGBITS_FAILED_IOCTL);
  46 #else
  47 int drm_debug = 0;
  48 #endif
  49 int drm_notyet_flag = 0;
  50
  51 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  52 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  53
  54 static int drm_load(struct drm_device *dev);
  55 static void drm_unload(struct drm_device *dev);
  56 drm_pci_id_list_t *drm_find_description(int vendor, int device,
  57     drm_pci_id_list_t *idlist);
  58
  59 #define DRIVER_SOFTC(unit) \
  60         ((struct drm_device *)devclass_get_softc(drm_devclass, unit))
  61
  62 static int
  63 drm_modevent(module_t mod, int type, void *data)
  64 {
  65
  66         switch (type) {
  67         case MOD_LOAD:
  68                 TUNABLE_INT_FETCH("drm.debug", &drm_debug);
  69                 TUNABLE_INT_FETCH("drm.notyet", &drm_notyet_flag);
  70                 break;
  71         }
  72         return (0);
  73 }
  74
  75 static moduledata_t drm_mod = {
  76         "drm",
  77         drm_modevent,
  78         0
  79 };
  80 DECLARE_MODULE(drm, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
  81 MODULE_VERSION(drm, 1);
  82 MODULE_DEPEND(drm, agp, 1, 1, 1);
  83 MODULE_DEPEND(drm, pci, 1, 1, 1);
  84 MODULE_DEPEND(drm, 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_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 120         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, 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
 150         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, 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 | D_MPSAFE },
 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(struct drm_device *dev, unsigned long flags)
 208 {
 209         int i = 0;
 210
 211         if (dev->driver->use_msi != NULL) {
 212                 int use_msi;
 213
 214                 use_msi = dev->driver->use_msi(dev, flags);
 215
 216                 return (!use_msi);
 217         }
 218
 219         /* TODO: Maybe move this to a callback in i915? */
 220         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
 221                 if ((drm_msi_blacklist[i].vendor == dev->pci_vendor) &&
 222                     (drm_msi_blacklist[i].device == dev->pci_device)) {
 223                         return 1;
 224                 }
 225         }
 226
 227         return 0;
 228 }
 229
 230 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
 231 {
 232         drm_pci_id_list_t *id_entry;
 233         int vendor, device;
 234
 235         vendor = pci_get_vendor(kdev);
 236         device = pci_get_device(kdev);
 237
 238         if (pci_get_class(kdev) != PCIC_DISPLAY)
 239                 return ENXIO;
 240
 241         id_entry = drm_find_description(vendor, device, idlist);
 242         if (id_entry != NULL) {
 243                 if (!device_get_desc(kdev)) {
 244                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 245                         device_set_desc(kdev, id_entry->name);
 246                 }
 247                 return 0;
 248         }
 249
 250         return ENXIO;
 251 }
 252
 253 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 254 {
 255         struct drm_device *dev;
 256         drm_pci_id_list_t *id_entry;
 257         int unit, error, msicount;
 258         int rid = 0;
 259
 260         unit = device_get_unit(kdev);
 261         dev = device_get_softc(kdev);
 262
 263         if (!strcmp(device_get_name(kdev), "drmsub"))
 264                 dev->dev = device_get_parent(kdev);
 265         else
 266                 dev->dev = kdev;
 267
 268         dev->pci_domain = pci_get_domain(dev->dev);
 269         dev->pci_bus = pci_get_bus(dev->dev);
 270         dev->pci_slot = pci_get_slot(dev->dev);
 271         dev->pci_func = pci_get_function(dev->dev);
 272
 273         dev->pci_vendor = pci_get_vendor(dev->dev);
 274         dev->pci_device = pci_get_device(dev->dev);
 275         dev->pci_subvendor = pci_get_subvendor(dev->dev);
 276         dev->pci_subdevice = pci_get_subdevice(dev->dev);
 277
 278         id_entry = drm_find_description(dev->pci_vendor,
 279             dev->pci_device, idlist);
 280         dev->id_entry = id_entry;
 281
 282         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 283                 if (drm_msi &&
 284                     !drm_msi_is_blacklisted(dev, dev->id_entry->driver_private)) {
 285                         msicount = pci_msi_count(dev->dev);
 286                         DRM_DEBUG("MSI count = %d\n", msicount);
 287                         if (msicount > 1)
 288                                 msicount = 1;
 289
 290                         if (pci_alloc_msi(dev->dev, &rid, msicount, -1) == 0) {
 291                                 DRM_INFO("MSI enabled %d message(s)\n",
 292                                     msicount);
 293                                 dev->msi_enabled = 1;
 294                                 dev->irqrid = rid;
 295                         }
 296                 }
 297
 298                 dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ,
 299                     &dev->irqrid, RF_SHAREABLE);
 300                 if (!dev->irqr) {
 301                         return (ENOENT);
 302                 }
 303
 304                 dev->irq = (int) rman_get_start(dev->irqr);
 305         }
 306
 307         lockinit(&dev->dev_lock, "drmdev", 0, LK_CANRECURSE);
 308         lwkt_serialize_init(&dev->irq_lock);
 309         lockinit(&dev->vbl_lock, "drmvbl", 0, LK_CANRECURSE);
 310         lockinit(&dev->event_lock, "drmev", 0, LK_CANRECURSE);
 311         lockinit(&dev->dev_struct_lock, "drmslk", 0, LK_CANRECURSE);
 312
 313         error = drm_load(dev);
 314         if (error)
 315                 goto error;
 316
 317         error = drm_create_cdevs(kdev);
 318         if (error)
 319                 goto error;
 320
 321         return (error);
 322 error:
 323         if (dev->irqr) {
 324                 bus_release_resource(dev->dev, SYS_RES_IRQ,
 325                     dev->irqrid, dev->irqr);
 326         }
 327         if (dev->msi_enabled) {
 328                 pci_release_msi(dev->dev);
 329         }
 330         return (error);
 331 }
 332
 333 int
 334 drm_create_cdevs(device_t kdev)
 335 {
 336         struct drm_device *dev;
 337         int error, unit;
 338
 339         unit = device_get_unit(kdev);
 340         dev = device_get_softc(kdev);
 341
 342         dev->devnode = make_dev(&drm_cdevsw, unit, DRM_DEV_UID, DRM_DEV_GID,
 343                                 DRM_DEV_MODE, "dri/card%d", unit);
 344         error = 0;
 345         if (error == 0)
 346                 dev->devnode->si_drv1 = dev;
 347         return (error);
 348 }
 349
 350 int drm_detach(device_t kdev)
 351 {
 352         struct drm_device *dev;
 353
 354         dev = device_get_softc(kdev);
 355         drm_unload(dev);
 356         if (dev->irqr) {
 357                 bus_release_resource(dev->dev, SYS_RES_IRQ, dev->irqrid,
 358                     dev->irqr);
 359                 if (dev->msi_enabled) {
 360                         pci_release_msi(dev->dev);
 361                         DRM_INFO("MSI released\n");
 362                 }
 363         }
 364         return (0);
 365 }
 366
 367 #ifndef DRM_DEV_NAME
 368 #define DRM_DEV_NAME "drm"
 369 #endif
 370
 371 devclass_t drm_devclass;
 372
 373 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 374     drm_pci_id_list_t *idlist)
 375 {
 376         int i = 0;
 377
 378         for (i = 0; idlist[i].vendor != 0; i++) {
 379                 if ((idlist[i].vendor == vendor) &&
 380                     ((idlist[i].device == device) ||
 381                     (idlist[i].device == 0))) {
 382                         return &idlist[i];
 383                 }
 384         }
 385         return NULL;
 386 }
 387
 388 /**
 389  * Take down the DRM device.
 390  *
 391  * \param dev DRM device structure.
 392  *
 393  * Frees every resource in \p dev.
 394  *
 395  * \sa drm_device
 396  */
 397 static int drm_lastclose(struct drm_device *dev)
 398 {
 399         drm_magic_entry_t *pt, *next;
 400         int i;
 401
 402         DRM_DEBUG("\n");
 403
 404         if (dev->driver->lastclose != NULL)
 405                 dev->driver->lastclose(dev);
 406
 407         if (!drm_core_check_feature(dev, DRIVER_MODESET) && dev->irq_enabled)
 408                 drm_irq_uninstall(dev);
 409
 410         DRM_LOCK(dev);
 411         if (dev->unique) {
 412                 drm_free(dev->unique, M_DRM);
 413                 dev->unique = NULL;
 414                 dev->unique_len = 0;
 415         }
 416         /* Clear pid list */
 417         for (i = 0; i < DRM_HASH_SIZE; i++) {
 418                 for (pt = dev->magiclist[i].head; pt; pt = next) {
 419                         next = pt->next;
 420                         drm_free(pt, M_DRM);
 421                 }
 422                 dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
 423         }
 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                         drm_free(entry, M_DRM);
 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         drm_dma_takedown(dev);
 454         if (dev->lock.hw_lock) {
 455                 dev->lock.hw_lock = NULL; /* SHM removed */
 456                 dev->lock.file_priv = NULL;
 457                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 458         }
 459         DRM_UNLOCK(dev);
 460
 461         return 0;
 462 }
 463
 464 static int drm_load(struct drm_device *dev)
 465 {
 466         int i, retcode;
 467
 468         DRM_DEBUG("\n");
 469
 470         INIT_LIST_HEAD(&dev->maplist);
 471         dev->map_unrhdr = new_unrhdr(1, ((1 << DRM_MAP_HANDLE_BITS) - 1), NULL);
 472         if (dev->map_unrhdr == NULL) {
 473                 DRM_ERROR("Couldn't allocate map number allocator\n");
 474                 return EINVAL;
 475         }
 476
 477
 478         drm_mem_init();
 479         drm_sysctl_init(dev);
 480         INIT_LIST_HEAD(&dev->filelist);
 481
 482         dev->counters  = 6;
 483         dev->types[0]  = _DRM_STAT_LOCK;
 484         dev->types[1]  = _DRM_STAT_OPENS;
 485         dev->types[2]  = _DRM_STAT_CLOSES;
 486         dev->types[3]  = _DRM_STAT_IOCTLS;
 487         dev->types[4]  = _DRM_STAT_LOCKS;
 488         dev->types[5]  = _DRM_STAT_UNLOCKS;
 489
 490         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 491                 atomic_set(&dev->counts[i], 0);
 492
 493         INIT_LIST_HEAD(&dev->vblank_event_list);
 494
 495         if (drm_core_has_AGP(dev)) {
 496                 if (drm_device_is_agp(dev))
 497                         dev->agp = drm_agp_init();
 498                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 499                     dev->agp == NULL) {
 500                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 501                             "AGP.\n");
 502                         retcode = ENOMEM;
 503                         goto error;
 504                 }
 505                 if (dev->agp != NULL && dev->agp->agp_info.ai_aperture_base != 0) {
 506                         if (drm_mtrr_add(dev->agp->agp_info.ai_aperture_base,
 507                             dev->agp->agp_info.ai_aperture_size, DRM_MTRR_WC) == 0)
 508                                 dev->agp->agp_mtrr = 1;
 509                 }
 510         }
 511
 512         retcode = drm_ctxbitmap_init(dev);
 513         if (retcode != 0) {
 514                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 515                 goto error;
 516         }
 517
 518         if (dev->driver->driver_features & DRIVER_GEM) {
 519                 retcode = drm_gem_init(dev);
 520                 if (retcode != 0) {
 521                         DRM_ERROR("Cannot initialize graphics execution "
 522                                   "manager (GEM)\n");
 523                         goto error1;
 524                 }
 525         }
 526
 527         if (dev->driver->load != NULL) {
 528                 DRM_LOCK(dev);
 529                 /* Shared code returns -errno. */
 530                 retcode = -dev->driver->load(dev,
 531                     dev->id_entry->driver_private);
 532                 if (pci_enable_busmaster(dev->dev))
 533                         DRM_ERROR("Request to enable bus-master failed.\n");
 534                 DRM_UNLOCK(dev);
 535                 if (retcode != 0)
 536                         goto error1;
 537         }
 538
 539         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 540             dev->driver->name,
 541             dev->driver->major,
 542             dev->driver->minor,
 543             dev->driver->patchlevel,
 544             dev->driver->date);
 545
 546         return 0;
 547
 548 error1:
 549         drm_gem_destroy(dev);
 550 error:
 551         drm_ctxbitmap_cleanup(dev);
 552         drm_sysctl_cleanup(dev);
 553         DRM_LOCK(dev);
 554         drm_lastclose(dev);
 555         DRM_UNLOCK(dev);
 556         if (dev->devnode != NULL)
 557                 destroy_dev(dev->devnode);
 558
 559         lockuninit(&dev->vbl_lock);
 560         lockuninit(&dev->dev_lock);
 561         lockuninit(&dev->event_lock);
 562         lockuninit(&dev->dev_struct_lock);
 563
 564         return retcode;
 565 }
 566
 567 static void drm_unload(struct drm_device *dev)
 568 {
 569         int i;
 570
 571         DRM_DEBUG("\n");
 572
 573         drm_sysctl_cleanup(dev);
 574         if (dev->devnode != NULL)
 575                 destroy_dev(dev->devnode);
 576
 577         drm_ctxbitmap_cleanup(dev);
 578
 579         if (dev->driver->driver_features & DRIVER_GEM)
 580                 drm_gem_destroy(dev);
 581
 582         if (dev->agp && dev->agp->agp_mtrr) {
 583                 int __unused retcode;
 584
 585                 retcode = drm_mtrr_del(0, dev->agp->agp_info.ai_aperture_base,
 586                     dev->agp->agp_info.ai_aperture_size, DRM_MTRR_WC);
 587                 DRM_DEBUG("mtrr_del = %d", retcode);
 588         }
 589
 590         drm_vblank_cleanup(dev);
 591
 592         DRM_LOCK(dev);
 593         drm_lastclose(dev);
 594         DRM_UNLOCK(dev);
 595
 596         /* Clean up PCI resources allocated by drm_bufs.c.  We're not really
 597          * worried about resource consumption while the DRM is inactive (between
 598          * lastclose and firstopen or unload) because these aren't actually
 599          * taking up KVA, just keeping the PCI resource allocated.
 600          */
 601         for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
 602                 if (dev->pcir[i] == NULL)
 603                         continue;
 604                 bus_release_resource(dev->dev, SYS_RES_MEMORY,
 605                     dev->pcirid[i], dev->pcir[i]);
 606                 dev->pcir[i] = NULL;
 607         }
 608
 609         if (dev->agp) {
 610                 drm_free(dev->agp, M_DRM);
 611                 dev->agp = NULL;
 612         }
 613
 614         if (dev->driver->unload != NULL) {
 615                 DRM_LOCK(dev);
 616                 dev->driver->unload(dev);
 617                 DRM_UNLOCK(dev);
 618         }
 619
 620         delete_unrhdr(dev->map_unrhdr);
 621
 622         drm_mem_uninit();
 623
 624         if (pci_disable_busmaster(dev->dev))
 625                 DRM_ERROR("Request to disable bus-master failed.\n");
 626
 627         lockuninit(&dev->vbl_lock);
 628         lockuninit(&dev->dev_lock);
 629         lockuninit(&dev->event_lock);
 630         lockuninit(&dev->dev_struct_lock);
 631 }
 632
 633 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 634 {
 635         struct drm_version *version = data;
 636         int len;
 637
 638 #define DRM_COPY( name, value )                                         \
 639         len = strlen( value );                                          \
 640         if ( len > name##_len ) len = name##_len;                       \
 641         name##_len = strlen( value );                                   \
 642         if ( len && name ) {                                            \
 643                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 644                         return EFAULT;                          \
 645         }
 646
 647         version->version_major          = dev->driver->major;
 648         version->version_minor          = dev->driver->minor;
 649         version->version_patchlevel     = dev->driver->patchlevel;
 650
 651         DRM_COPY(version->name, dev->driver->name);
 652         DRM_COPY(version->date, dev->driver->date);
 653         DRM_COPY(version->desc, dev->driver->desc);
 654
 655         return 0;
 656 }
 657
 658 /*
 659  * Stub is needed for devfs
 660  */
 661 int drm_close(struct dev_close_args *ap)
 662 {
 663         return 0;
 664 }
 665
 666 void drm_cdevpriv_dtor(void *cd)
 667 {
 668         struct drm_file *file_priv = cd;
 669         struct drm_device *dev = file_priv->dev;
 670         int retcode = 0;
 671
 672         DRM_DEBUG("open_count = %d\n", dev->open_count);
 673
 674         DRM_LOCK(dev);
 675
 676         if (dev->driver->preclose != NULL)
 677                 dev->driver->preclose(dev, file_priv);
 678
 679         /* ========================================================
 680          * Begin inline drm_release
 681          */
 682
 683         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 684             DRM_CURRENTPID, (long)dev->dev, dev->open_count);
 685
 686         if (dev->driver->driver_features & DRIVER_GEM)
 687                 drm_gem_release(dev, file_priv);
 688
 689         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 690             && dev->lock.file_priv == file_priv) {
 691                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 692                           DRM_CURRENTPID,
 693                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 694                 if (dev->driver->reclaim_buffers_locked != NULL)
 695                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 696
 697                 drm_lock_free(&dev->lock,
 698                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 699
 700                                 /* FIXME: may require heavy-handed reset of
 701                                    hardware at this point, possibly
 702                                    processed via a callback to the X
 703                                    server. */
 704         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 705             dev->lock.hw_lock != NULL) {
 706                 /* The lock is required to reclaim buffers */
 707                 for (;;) {
 708                         if (!dev->lock.hw_lock) {
 709                                 /* Device has been unregistered */
 710                                 retcode = EINTR;
 711                                 break;
 712                         }
 713                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 714                                 dev->lock.file_priv = file_priv;
 715                                 dev->lock.lock_time = jiffies;
 716                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 717                                 break;  /* Got lock */
 718                         }
 719                         /* Contention */
 720                         retcode = DRM_LOCK_SLEEP(dev, &dev->lock.lock_queue,
 721                             PCATCH, "drmlk2", 0);
 722                         if (retcode)
 723                                 break;
 724                 }
 725                 if (retcode == 0) {
 726                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 727                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 728                 }
 729         }
 730
 731         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 732             !dev->driver->reclaim_buffers_locked)
 733                 drm_reclaim_buffers(dev, file_priv);
 734
 735         funsetown(&dev->buf_sigio);
 736
 737         if (dev->driver->postclose != NULL)
 738                 dev->driver->postclose(dev, file_priv);
 739         list_del(&file_priv->lhead);
 740
 741
 742         /* ========================================================
 743          * End inline drm_release
 744          */
 745
 746         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 747         device_unbusy(dev->dev);
 748         if (--dev->open_count == 0) {
 749                 retcode = drm_lastclose(dev);
 750         }
 751
 752         DRM_UNLOCK(dev);
 753 }
 754
 755 /* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
 756  */
 757 int drm_ioctl(struct dev_ioctl_args *ap)
 758 {
 759         struct cdev *kdev = ap->a_head.a_dev;
 760         u_long cmd = ap->a_cmd;
 761         caddr_t data = ap->a_data;
 762         struct thread *p = curthread;
 763         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 764         int retcode = 0;
 765         drm_ioctl_desc_t *ioctl;
 766         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 767         int nr = DRM_IOCTL_NR(cmd);
 768         int is_driver_ioctl = 0;
 769         struct drm_file *file_priv;
 770
 771         retcode = devfs_get_cdevpriv(ap->a_fp, (void **)&file_priv);
 772         if (retcode !=0) {
 773                 DRM_ERROR("can't find authenticator\n");
 774                 return EINVAL;
 775         }
 776
 777         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 778         ++file_priv->ioctl_count;
 779
 780         DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 781             DRM_CURRENTPID, cmd, nr, (long)dev->dev,
 782             file_priv->authenticated);
 783
 784         switch (cmd) {
 785         case FIONBIO:
 786         case FIOASYNC:
 787                 return 0;
 788
 789         case FIOSETOWN:
 790                 return fsetown(*(int *)data, &dev->buf_sigio);
 791
 792         case FIOGETOWN:
 793                 *(int *) data = fgetown(&dev->buf_sigio);
 794                 return 0;
 795         }
 796
 797         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 798                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 799                 return EINVAL;
 800         }
 801
 802         ioctl = &drm_ioctls[nr];
 803         /* It's not a core DRM ioctl, try driver-specific. */
 804         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 805                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 806                 nr -= DRM_COMMAND_BASE;
 807                 if (nr > dev->driver->num_ioctls) {
 808                         return EINVAL;
 809                 }
 810                 ioctl = &dev->driver->ioctls[nr];
 811                 is_driver_ioctl = 1;
 812         }
 813         func = ioctl->func;
 814
 815         if (func == NULL) {
 816                 DRM_DEBUG("no function\n");
 817                 return EINVAL;
 818         }
 819
 820         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 821             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 822             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 823                 return EACCES;
 824
 825         if (is_driver_ioctl) {
 826                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 827                         DRM_LOCK(dev);
 828                 /* shared code returns -errno */
 829                 retcode = -func(dev, data, file_priv);
 830                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 831                         DRM_UNLOCK(dev);
 832         } else {
 833                 retcode = func(dev, data, file_priv);
 834         }
 835
 836         if (retcode != 0)
 837                 DRM_DEBUG("    returning %d\n", retcode);
 838         if (retcode != 0 &&
 839             (drm_debug & DRM_DEBUGBITS_FAILED_IOCTL) != 0) {
 840                 kprintf(
 841 "pid %d, cmd 0x%02lx, nr 0x%02x/%1d, dev 0x%lx, auth %d, res %d\n",
 842                     DRM_CURRENTPID, cmd, nr, is_driver_ioctl, (long)dev->dev,
 843                     file_priv->authenticated, retcode);
 844         }
 845
 846         return retcode;
 847 }
 848
 849 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 850 {
 851         struct drm_map_list *entry;
 852
 853         list_for_each_entry(entry, &dev->maplist, head) {
 854                 if (entry->map && entry->map->type == _DRM_SHM &&
 855                     (entry->map->flags & _DRM_CONTAINS_LOCK)) {
 856                         return entry->map;
 857                 }
 858         }
 859
 860         return NULL;
 861 }
 862
 863 int
 864 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 865     struct sysctl_oid *top)
 866 {
 867         struct sysctl_oid *oid;
 868
 869         ksnprintf(dev->busid_str, sizeof(dev->busid_str),
 870              "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus,
 871              dev->pci_slot, dev->pci_func);
 872         oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid",
 873             CTLFLAG_RD, dev->busid_str, 0, NULL);
 874         if (oid == NULL)
 875                 return (ENOMEM);
 876         dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0;
 877         oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO,
 878             "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL);
 879         if (oid == NULL)
 880                 return (ENOMEM);
 881
 882         return (0);
 883 }
 884
 885 int
 886 drm_mmap_single(struct dev_mmap_single_args *ap)
 887 {
 888         struct drm_device *dev;
 889         struct cdev *kdev = ap->a_head.a_dev;
 890         vm_ooffset_t *offset = ap->a_offset;
 891         vm_size_t size = ap->a_size;
 892         struct vm_object **obj_res = ap->a_object;
 893         int nprot = ap->a_nprot;
 894
 895         dev = drm_get_device_from_kdev(kdev);
 896         if (dev->drm_ttm_bdev != NULL) {
 897                 return (ttm_bo_mmap_single(dev->drm_ttm_bdev, offset, size,
 898                     obj_res, nprot));
 899         } else if ((dev->driver->driver_features & DRIVER_GEM) != 0) {
 900                 return (drm_gem_mmap_single(dev, offset, size, obj_res, nprot));
 901         } else {
 902                 return (ENODEV);
 903         }
 904 }
 905
 906 #if DRM_LINUX
 907
 908 #include <sys/sysproto.h>
 909
 910 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 911
 912 #define LINUX_IOCTL_DRM_MIN             0x6400
 913 #define LINUX_IOCTL_DRM_MAX             0x64ff
 914
 915 static linux_ioctl_function_t drm_linux_ioctl;
 916 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 917     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 918
 919 /* The bits for in/out are switched on Linux */
 920 #define LINUX_IOC_IN    IOC_OUT
 921 #define LINUX_IOC_OUT   IOC_IN
 922
 923 static int
 924 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 925 {
 926         int error;
 927         int cmd = args->cmd;
 928
 929         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 930         if (cmd & LINUX_IOC_IN)
 931                 args->cmd |= IOC_IN;
 932         if (cmd & LINUX_IOC_OUT)
 933                 args->cmd |= IOC_OUT;
 934
 935         error = ioctl(p, (struct ioctl_args *)args);
 936
 937         return error;
 938 }
 939 #endif /* DRM_LINUX */
 940
 941 static int
 942 drm_core_init(void *arg)
 943 {
 944
 945         drm_global_init();
 946
 947 #if DRM_LINUX
 948         linux_ioctl_register_handler(&drm_handler);
 949 #endif /* DRM_LINUX */
 950
 951         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 952                  CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
 953         return 0;
 954 }
 955
 956 static void
 957 drm_core_exit(void *arg)
 958 {
 959
 960 #if DRM_LINUX
 961         linux_ioctl_unregister_handler(&drm_handler);
 962 #endif /* DRM_LINUX */
 963
 964         drm_global_release();
 965 }
 966
 967 SYSINIT(drm_register, SI_SUB_DRIVERS, SI_ORDER_MIDDLE,
 968     drm_core_init, NULL);
 969 SYSUNINIT(drm_unregister, SI_SUB_DRIVERS, SI_ORDER_MIDDLE,
 970     drm_core_exit, NULL);
 971
 972 /*
 973  * Check if dmi_system_id structure matches system DMI data
 974  */
 975 static bool
 976 dmi_found(const struct dmi_system_id *dsi)
 977 {
 978         int i, slot;
 979         bool found = false;
 980         char *sys_vendor, *board_vendor, *product_name, *board_name;
 981
 982         sys_vendor = kgetenv("smbios.system.maker");
 983         board_vendor = kgetenv("smbios.planar.maker");
 984         product_name = kgetenv("smbios.system.product");
 985         board_name = kgetenv("smbios.planar.product");
 986
 987         for (i = 0; i < NELEM(dsi->matches); i++) {
 988                 slot = dsi->matches[i].slot;
 989                 switch (slot) {
 990                 case DMI_NONE:
 991                         break;
 992                 case DMI_SYS_VENDOR:
 993                         if (sys_vendor != NULL &&
 994                             !strcmp(sys_vendor, dsi->matches[i].substr))
 995                                 break;
 996                         else
 997                                 goto done;
 998                 case DMI_BOARD_VENDOR:
 999                         if (board_vendor != NULL &&
1000                             !strcmp(board_vendor, dsi->matches[i].substr))
1001                                 break;
1002                         else
1003                                 goto done;
1004                 case DMI_PRODUCT_NAME:
1005                         if (product_name != NULL &&
1006                             !strcmp(product_name, dsi->matches[i].substr))
1007                                 break;
1008                         else
1009                                 goto done;
1010                 case DMI_BOARD_NAME:
1011                         if (board_name != NULL &&
1012                             !strcmp(board_name, dsi->matches[i].substr))
1013                                 break;
1014                         else
1015                                 goto done;
1016                 default:
1017                         goto done;
1018                 }
1019         }
1020         found = true;
1021
1022 done:
1023         if (sys_vendor != NULL)
1024                 kfreeenv(sys_vendor);
1025         if (board_vendor != NULL)
1026                 kfreeenv(board_vendor);
1027         if (product_name != NULL)
1028                 kfreeenv(product_name);
1029         if (board_name != NULL)
1030                 kfreeenv(board_name);
1031
1032         return found;
1033 }
1034
1035 bool
1036 dmi_check_system(const struct dmi_system_id *sysid)
1037 {
1038         const struct dmi_system_id *dsi;
1039         int num = 0;
1040
1041         for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) {
1042                 if (dmi_found(dsi)) {
1043                         num++;
1044                         if (dsi->callback && dsi->callback(dsi))
1045                                 break;
1046                 }
1047         }
1048         return (num);
1049 }
1050