sys/dev/drm/drm_drv.c

   1 /**
   2  * \file drm_drv.c
   3  * Generic driver template
   4  *
   5  * \author Rickard E. (Rik) Faith <faith@valinux.com>
   6  * \author Gareth Hughes <gareth@valinux.com>
   7  *
   8  * To use this template, you must at least define the following (samples
   9  * given for the MGA driver):
  10  *
  11  * \code
  12  * #define DRIVER_AUTHOR        "VA Linux Systems, Inc."
  13  *
  14  * #define DRIVER_NAME          "mga"
  15  * #define DRIVER_DESC          "Matrox G200/G400"
  16  * #define DRIVER_DATE          "20001127"
  17  *
  18  * #define drm_x                mga_##x
  19  * \endcode
  20  */
  21
  22 /*
  23  * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
  24  *
  25  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
  26  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  27  * All Rights Reserved.
  28  *
  29  * Permission is hereby granted, free of charge, to any person obtaining a
  30  * copy of this software and associated documentation files (the "Software"),
  31  * to deal in the Software without restriction, including without limitation
  32  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  33  * and/or sell copies of the Software, and to permit persons to whom the
  34  * Software is furnished to do so, subject to the following conditions:
  35  *
  36  * The above copyright notice and this permission notice (including the next
  37  * paragraph) shall be included in all copies or substantial portions of the
  38  * Software.
  39  *
  40  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  41  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  42  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  43  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  44  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  45  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  46  * OTHER DEALINGS IN THE SOFTWARE.
  47  */
  48
  49 #include <sys/devfs.h>
  50
  51 #include <linux/export.h>
  52 #include <drm/drmP.h>
  53 #include <drm/drm_core.h>
  54
  55 #if DRM_DEBUG_DEFAULT_ON == 1
  56 #define DRM_DEBUGBITS_ON (DRM_DEBUGBITS_DEBUG | DRM_DEBUGBITS_KMS | \
  57     DRM_DEBUGBITS_FAILED_IOCTL)
  58 #elif DRM_DEBUG_DEFAULT_ON == 2
  59 #define DRM_DEBUGBITS_ON (DRM_DEBUGBITS_DEBUG | DRM_DEBUGBITS_KMS | \
  60     DRM_DEBUGBITS_FAILED_IOCTL | DRM_DEBUGBITS_VERBOSE)
  61 #else
  62 #define DRM_DEBUGBITS_ON (0x0)
  63 #endif
  64
  65 int drm_debug = DRM_DEBUGBITS_ON;
  66 int drm_notyet_flag = 0;
  67
  68 unsigned int drm_vblank_offdelay = 5000;    /* Default to 5000 msecs. */
  69 unsigned int drm_timestamp_precision = 20;  /* Default to 20 usecs. */
  70
  71 static int drm_load(struct drm_device *dev);
  72 drm_pci_id_list_t *drm_find_description(int vendor, int device,
  73     drm_pci_id_list_t *idlist);
  74
  75 #define DRIVER_SOFTC(unit) \
  76         ((struct drm_device *)devclass_get_softc(drm_devclass, unit))
  77
  78 static int
  79 drm_modevent(module_t mod, int type, void *data)
  80 {
  81
  82         switch (type) {
  83         case MOD_LOAD:
  84                 TUNABLE_INT_FETCH("drm.debug", &drm_debug);
  85                 TUNABLE_INT_FETCH("drm.notyet", &drm_notyet_flag);
  86                 break;
  87         }
  88         return (0);
  89 }
  90
  91 static moduledata_t drm_mod = {
  92         "drm",
  93         drm_modevent,
  94         0
  95 };
  96 DECLARE_MODULE(drm, drm_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
  97 MODULE_VERSION(drm, 1);
  98 MODULE_DEPEND(drm, agp, 1, 1, 1);
  99 MODULE_DEPEND(drm, pci, 1, 1, 1);
 100 MODULE_DEPEND(drm, iicbus, 1, 1, 1);
 101
 102 #define DRM_IOCTL_DEF(ioctl, func, flags) \
 103         [DRM_IOCTL_NR(ioctl)] = {ioctl, func, flags}
 104
 105 /** Ioctl table */
 106 static struct drm_ioctl_desc drm_ioctls[256] = {
 107         DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
 108         DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
 109         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
 110         DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
 111         DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
 112         DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
 113         DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
 114         DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED),
 115         DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
 116         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
 117
 118         DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 119         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 120         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 121         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 122
 123         DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 124         DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
 125
 126         DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 127         DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
 128
 129         DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
 130         DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
 131
 132         DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
 133         DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 134         DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 135         DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
 136         DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 137         DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 138         DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
 139
 140         DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 141         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 142
 143         DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
 144         DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
 145
 146         DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
 147
 148         DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 149         DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 150         DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
 151         DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
 152         DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
 153         DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma, DRM_AUTH),
 154
 155         DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 156
 157         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 158         DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 159         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 160         DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
 161         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 162         DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 163         DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 164         DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 165
 166         DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 167         DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 168         DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
 169         DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
 170
 171         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 172
 173         DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
 174         DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
 175         DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
 176
 177         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 178         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 179         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 180         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 181         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 182         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 183         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 184         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER|DRM_UNLOCKED),
 185         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
 186         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 187         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 188         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 189         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 190         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 191         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 192         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 193         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 194         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 195         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 196         DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 197         DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 198         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 199         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 200         DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 201         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 202 };
 203
 204 #define DRM_CORE_IOCTL_COUNT    ARRAY_SIZE( drm_ioctls )
 205
 206 static struct dev_ops drm_cdevsw = {
 207         { "drm", 0, D_TRACKCLOSE | D_MPSAFE },
 208         .d_open =       drm_open,
 209         .d_close =      drm_close,
 210         .d_read =       drm_read,
 211         .d_ioctl =      drm_ioctl,
 212         .d_kqfilter =   drm_kqfilter,
 213         .d_mmap =       drm_mmap,
 214         .d_mmap_single = drm_mmap_single,
 215 };
 216
 217 static int drm_msi = 1; /* Enable by default. */
 218 TUNABLE_INT("hw.drm.msi", &drm_msi);
 219 SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device");
 220 SYSCTL_INT(_hw_drm, OID_AUTO, msi, CTLFLAG_RD, &drm_msi, 1,
 221     "Enable MSI interrupts for drm devices");
 222
 223 static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
 224         {0x8086, 0x2772}, /* Intel i945G        */ \
 225         {0x8086, 0x27A2}, /* Intel i945GM       */ \
 226         {0x8086, 0x27AE}, /* Intel i945GME      */ \
 227         {0, 0}
 228 };
 229
 230 static int drm_msi_is_blacklisted(struct drm_device *dev, unsigned long flags)
 231 {
 232         int i = 0;
 233
 234         if (dev->driver->use_msi != NULL) {
 235                 int use_msi;
 236
 237                 use_msi = dev->driver->use_msi(dev, flags);
 238
 239                 return (!use_msi);
 240         }
 241
 242         /* TODO: Maybe move this to a callback in i915? */
 243         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
 244                 if ((drm_msi_blacklist[i].vendor == dev->pci_vendor) &&
 245                     (drm_msi_blacklist[i].device == dev->pci_device)) {
 246                         return 1;
 247                 }
 248         }
 249
 250         return 0;
 251 }
 252
 253 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
 254 {
 255         drm_pci_id_list_t *id_entry;
 256         int vendor, device;
 257
 258         vendor = pci_get_vendor(kdev);
 259         device = pci_get_device(kdev);
 260
 261         if (pci_get_class(kdev) != PCIC_DISPLAY)
 262                 return ENXIO;
 263
 264         id_entry = drm_find_description(vendor, device, idlist);
 265         if (id_entry != NULL) {
 266                 if (!device_get_desc(kdev)) {
 267                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 268                         device_set_desc(kdev, id_entry->name);
 269                 }
 270                 return 0;
 271         }
 272
 273         return ENXIO;
 274 }
 275
 276 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 277 {
 278         struct drm_device *dev;
 279         drm_pci_id_list_t *id_entry;
 280         int unit, error, msicount;
 281         int rid = 0;
 282
 283         unit = device_get_unit(kdev);
 284         dev = device_get_softc(kdev);
 285
 286         if (!strcmp(device_get_name(kdev), "drmsub"))
 287                 dev->dev = device_get_parent(kdev);
 288         else
 289                 dev->dev = kdev;
 290
 291         dev->pci_domain = pci_get_domain(dev->dev);
 292         dev->pci_bus = pci_get_bus(dev->dev);
 293         dev->pci_slot = pci_get_slot(dev->dev);
 294         dev->pci_func = pci_get_function(dev->dev);
 295
 296         dev->pci_vendor = pci_get_vendor(dev->dev);
 297         dev->pci_device = pci_get_device(dev->dev);
 298         dev->pci_subvendor = pci_get_subvendor(dev->dev);
 299         dev->pci_subdevice = pci_get_subdevice(dev->dev);
 300
 301         id_entry = drm_find_description(dev->pci_vendor,
 302             dev->pci_device, idlist);
 303         dev->id_entry = id_entry;
 304
 305         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 306                 if (drm_msi &&
 307                     !drm_msi_is_blacklisted(dev, dev->id_entry->driver_private)) {
 308                         msicount = pci_msi_count(dev->dev);
 309                         DRM_DEBUG("MSI count = %d\n", msicount);
 310                         if (msicount > 1)
 311                                 msicount = 1;
 312
 313                         if (pci_alloc_msi(dev->dev, &rid, msicount, -1) == 0) {
 314                                 DRM_INFO("MSI enabled %d message(s)\n",
 315                                     msicount);
 316                                 dev->msi_enabled = 1;
 317                                 dev->irqrid = rid;
 318                         }
 319                 }
 320
 321                 dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ,
 322                     &dev->irqrid, RF_SHAREABLE);
 323                 if (!dev->irqr) {
 324                         return (ENOENT);
 325                 }
 326
 327                 dev->irq = (int) rman_get_start(dev->irqr);
 328         }
 329
 330         lockinit(&dev->dev_lock, "drmdev", 0, LK_CANRECURSE);
 331         lwkt_serialize_init(&dev->irq_lock);
 332         lockinit(&dev->event_lock, "drmev", 0, LK_CANRECURSE);
 333         lockinit(&dev->struct_mutex, "drmslk", 0, LK_CANRECURSE);
 334
 335         error = drm_load(dev);
 336         if (error)
 337                 goto error;
 338
 339         error = drm_create_cdevs(kdev);
 340         if (error)
 341                 goto error;
 342
 343         return (error);
 344 error:
 345         if (dev->irqr) {
 346                 bus_release_resource(dev->dev, SYS_RES_IRQ,
 347                     dev->irqrid, dev->irqr);
 348         }
 349         if (dev->msi_enabled) {
 350                 pci_release_msi(dev->dev);
 351         }
 352         return (error);
 353 }
 354
 355 int
 356 drm_create_cdevs(device_t kdev)
 357 {
 358         struct drm_device *dev;
 359         int error, unit;
 360
 361         unit = device_get_unit(kdev);
 362         dev = device_get_softc(kdev);
 363
 364         dev->devnode = make_dev(&drm_cdevsw, unit, DRM_DEV_UID, DRM_DEV_GID,
 365                                 DRM_DEV_MODE, "dri/card%d", unit);
 366         error = 0;
 367         if (error == 0)
 368                 dev->devnode->si_drv1 = dev;
 369         return (error);
 370 }
 371
 372 #ifndef DRM_DEV_NAME
 373 #define DRM_DEV_NAME "drm"
 374 #endif
 375
 376 devclass_t drm_devclass;
 377
 378 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 379     drm_pci_id_list_t *idlist)
 380 {
 381         int i = 0;
 382
 383         for (i = 0; idlist[i].vendor != 0; i++) {
 384                 if ((idlist[i].vendor == vendor) &&
 385                     ((idlist[i].device == device) ||
 386                     (idlist[i].device == 0))) {
 387                         return &idlist[i];
 388                 }
 389         }
 390         return NULL;
 391 }
 392
 393 /**
 394  * Take down the DRM device.
 395  *
 396  * \param dev DRM device structure.
 397  *
 398  * Frees every resource in \p dev.
 399  *
 400  * \sa drm_device
 401  */
 402 int drm_lastclose(struct drm_device * dev)
 403 {
 404         drm_magic_entry_t *pt, *next;
 405
 406         DRM_DEBUG("\n");
 407
 408         if (dev->driver->lastclose != NULL)
 409                 dev->driver->lastclose(dev);
 410
 411         if (!drm_core_check_feature(dev, DRIVER_MODESET) && dev->irq_enabled)
 412                 drm_irq_uninstall(dev);
 413
 414         DRM_LOCK(dev);
 415         if (dev->unique) {
 416                 drm_free(dev->unique, M_DRM);
 417                 dev->unique = NULL;
 418                 dev->unique_len = 0;
 419         }
 420
 421         /* Clear pid list */
 422         if (dev->magicfree.next) {
 423                 list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
 424                         list_del(&pt->head);
 425                         drm_ht_remove_item(&dev->magiclist, &pt->hash_item);
 426                         kfree(pt);
 427                 }
 428                 drm_ht_remove(&dev->magiclist);
 429         }
 430
 431         /* Clear AGP information */
 432         if (dev->agp) {
 433                 drm_agp_mem_t *entry;
 434                 drm_agp_mem_t *nexte;
 435
 436                 /* Remove AGP resources, but leave dev->agp intact until
 437                  * drm_unload is called.
 438                  */
 439                 for (entry = dev->agp->memory; entry; entry = nexte) {
 440                         nexte = entry->next;
 441                         if (entry->bound)
 442                                 drm_agp_unbind_memory(entry->handle);
 443                         drm_agp_free_memory(entry->handle);
 444                         drm_free(entry, M_DRM);
 445                 }
 446                 dev->agp->memory = NULL;
 447
 448                 if (dev->agp->acquired)
 449                         drm_agp_release(dev);
 450
 451                 dev->agp->acquired = 0;
 452                 dev->agp->enabled  = 0;
 453         }
 454         if (dev->sg != NULL) {
 455                 drm_sg_cleanup(dev->sg);
 456                 dev->sg = NULL;
 457         }
 458
 459         drm_dma_takedown(dev);
 460         if (dev->lock.hw_lock) {
 461                 dev->lock.hw_lock = NULL; /* SHM removed */
 462                 dev->lock.file_priv = NULL;
 463                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 464         }
 465         DRM_UNLOCK(dev);
 466
 467         return 0;
 468 }
 469
 470 static int drm_load(struct drm_device *dev)
 471 {
 472         int i, retcode;
 473
 474         DRM_DEBUG("\n");
 475
 476         INIT_LIST_HEAD(&dev->maplist);
 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->struct_mutex);
 563
 564         return retcode;
 565 }
 566
 567 /**
 568  * Get version information
 569  *
 570  * \param inode device inode.
 571  * \param filp file pointer.
 572  * \param cmd command.
 573  * \param arg user argument, pointing to a drm_version structure.
 574  * \return zero on success or negative number on failure.
 575  *
 576  * Fills in the version information in \p arg.
 577  */
 578 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 579 {
 580         struct drm_version *version = data;
 581         int len;
 582
 583 #define DRM_COPY( name, value )                                         \
 584         len = strlen( value );                                          \
 585         if ( len > name##_len ) len = name##_len;                       \
 586         name##_len = strlen( value );                                   \
 587         if ( len && name ) {                                            \
 588                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 589                         return EFAULT;                          \
 590         }
 591
 592         version->version_major          = dev->driver->major;
 593         version->version_minor          = dev->driver->minor;
 594         version->version_patchlevel     = dev->driver->patchlevel;
 595
 596         DRM_COPY(version->name, dev->driver->name);
 597         DRM_COPY(version->date, dev->driver->date);
 598         DRM_COPY(version->desc, dev->driver->desc);
 599
 600         return 0;
 601 }
 602
 603 /*
 604  * Stub is needed for devfs
 605  */
 606 int drm_close(struct dev_close_args *ap)
 607 {
 608         return 0;
 609 }
 610
 611 void drm_cdevpriv_dtor(void *cd)
 612 {
 613         struct drm_file *file_priv = cd;
 614         struct drm_device *dev = file_priv->dev;
 615         int retcode = 0;
 616
 617         DRM_DEBUG("open_count = %d\n", dev->open_count);
 618
 619         DRM_LOCK(dev);
 620
 621         if (dev->driver->preclose != NULL)
 622                 dev->driver->preclose(dev, file_priv);
 623
 624         /* ========================================================
 625          * Begin inline drm_release
 626          */
 627
 628         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 629             DRM_CURRENTPID, (long)dev->dev, dev->open_count);
 630
 631         if (dev->driver->driver_features & DRIVER_GEM)
 632                 drm_gem_release(dev, file_priv);
 633
 634         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 635             && dev->lock.file_priv == file_priv) {
 636                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 637                           DRM_CURRENTPID,
 638                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 639                 if (dev->driver->reclaim_buffers_locked != NULL)
 640                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 641
 642                 drm_lock_free(&dev->lock,
 643                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 644
 645                                 /* FIXME: may require heavy-handed reset of
 646                                    hardware at this point, possibly
 647                                    processed via a callback to the X
 648                                    server. */
 649         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 650             dev->lock.hw_lock != NULL) {
 651                 /* The lock is required to reclaim buffers */
 652                 for (;;) {
 653                         if (!dev->lock.hw_lock) {
 654                                 /* Device has been unregistered */
 655                                 retcode = EINTR;
 656                                 break;
 657                         }
 658                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 659                                 dev->lock.file_priv = file_priv;
 660                                 dev->lock.lock_time = jiffies;
 661                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 662                                 break;  /* Got lock */
 663                         }
 664                         /* Contention */
 665                         retcode = DRM_LOCK_SLEEP(dev, &dev->lock.lock_queue,
 666                             PCATCH, "drmlk2", 0);
 667                         if (retcode)
 668                                 break;
 669                 }
 670                 if (retcode == 0) {
 671                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 672                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 673                 }
 674         }
 675
 676         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 677             !dev->driver->reclaim_buffers_locked)
 678                 drm_reclaim_buffers(dev, file_priv);
 679
 680         funsetown(&dev->buf_sigio);
 681
 682         if (dev->driver->postclose != NULL)
 683                 dev->driver->postclose(dev, file_priv);
 684         list_del(&file_priv->lhead);
 685
 686
 687         /* ========================================================
 688          * End inline drm_release
 689          */
 690
 691         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 692         device_unbusy(dev->dev);
 693         if (--dev->open_count == 0) {
 694                 retcode = drm_lastclose(dev);
 695         }
 696
 697         DRM_UNLOCK(dev);
 698 }
 699
 700 /**
 701  * Called whenever a process performs an ioctl on /dev/drm.
 702  *
 703  * \param inode device inode.
 704  * \param file_priv DRM file private.
 705  * \param cmd command.
 706  * \param arg user argument.
 707  * \return zero on success or negative number on failure.
 708  *
 709  * Looks up the ioctl function in the ::ioctls table, checking for root
 710  * previleges if so required, and dispatches to the respective function.
 711  */
 712 int drm_ioctl(struct dev_ioctl_args *ap)
 713 {
 714         struct cdev *kdev = ap->a_head.a_dev;
 715         u_long cmd = ap->a_cmd;
 716         caddr_t data = ap->a_data;
 717         struct thread *p = curthread;
 718         struct drm_device *dev = drm_get_device_from_kdev(kdev);
 719         int retcode = 0;
 720         struct drm_ioctl_desc *ioctl;
 721         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 722         int nr = DRM_IOCTL_NR(cmd);
 723         int is_driver_ioctl = 0;
 724         struct drm_file *file_priv;
 725
 726         retcode = devfs_get_cdevpriv(ap->a_fp, (void **)&file_priv);
 727         if (retcode !=0) {
 728                 DRM_ERROR("can't find authenticator\n");
 729                 return EINVAL;
 730         }
 731
 732         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 733
 734         DRM_DEBUG_VERBOSE("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 735             DRM_CURRENTPID, cmd, nr, (long)dev->dev,
 736             file_priv->authenticated);
 737
 738         switch (cmd) {
 739         case FIONBIO:
 740         case FIOASYNC:
 741                 return 0;
 742
 743         case FIOSETOWN:
 744                 return fsetown(*(int *)data, &dev->buf_sigio);
 745
 746         case FIOGETOWN:
 747                 *(int *) data = fgetown(&dev->buf_sigio);
 748                 return 0;
 749         }
 750
 751         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 752                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 753                 return EINVAL;
 754         }
 755
 756         ioctl = &drm_ioctls[nr];
 757         /* It's not a core DRM ioctl, try driver-specific. */
 758         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 759                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 760                 nr -= DRM_COMMAND_BASE;
 761                 if (nr > dev->driver->num_ioctls) {
 762                         return EINVAL;
 763                 }
 764                 ioctl = &dev->driver->ioctls[nr];
 765                 is_driver_ioctl = 1;
 766         }
 767         func = ioctl->func;
 768
 769         if (func == NULL) {
 770                 DRM_DEBUG("no function\n");
 771                 return EINVAL;
 772         }
 773
 774         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 775             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 776             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 777                 return EACCES;
 778
 779         if (is_driver_ioctl) {
 780                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 781                         DRM_LOCK(dev);
 782                 /* shared code returns -errno */
 783                 retcode = -func(dev, data, file_priv);
 784                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 785                         DRM_UNLOCK(dev);
 786         } else {
 787                 retcode = func(dev, data, file_priv);
 788         }
 789
 790         if (retcode != 0)
 791                 DRM_DEBUG("    returning %d\n", retcode);
 792         if (retcode != 0 &&
 793             (drm_debug & DRM_DEBUGBITS_FAILED_IOCTL) != 0) {
 794                 kprintf(
 795 "pid %d, cmd 0x%02lx, nr 0x%02x/%1d, dev 0x%lx, auth %d, res %d\n",
 796                     DRM_CURRENTPID, cmd, nr, is_driver_ioctl, (long)dev->dev,
 797                     file_priv->authenticated, retcode);
 798         }
 799
 800         return retcode;
 801 }
 802
 803 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 804 {
 805         struct drm_map_list *entry;
 806
 807         list_for_each_entry(entry, &dev->maplist, head) {
 808                 if (entry->map && entry->map->type == _DRM_SHM &&
 809                     (entry->map->flags & _DRM_CONTAINS_LOCK)) {
 810                         return entry->map;
 811                 }
 812         }
 813
 814         return NULL;
 815 }
 816
 817 int
 818 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 819     struct sysctl_oid *top)
 820 {
 821         struct sysctl_oid *oid;
 822
 823         ksnprintf(dev->busid_str, sizeof(dev->busid_str),
 824              "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus,
 825              dev->pci_slot, dev->pci_func);
 826         oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid",
 827             CTLFLAG_RD, dev->busid_str, 0, NULL);
 828         if (oid == NULL)
 829                 return (ENOMEM);
 830         dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0;
 831         oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO,
 832             "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL);
 833         if (oid == NULL)
 834                 return (ENOMEM);
 835
 836         return (0);
 837 }
 838
 839 int
 840 drm_mmap_single(struct dev_mmap_single_args *ap)
 841 {
 842         struct drm_device *dev;
 843         struct cdev *kdev = ap->a_head.a_dev;
 844         vm_ooffset_t *offset = ap->a_offset;
 845         vm_size_t size = ap->a_size;
 846         struct vm_object **obj_res = ap->a_object;
 847         int nprot = ap->a_nprot;
 848
 849         dev = drm_get_device_from_kdev(kdev);
 850         if (dev->drm_ttm_bdev != NULL) {
 851                 return (ttm_bo_mmap_single(dev->drm_ttm_bdev, offset, size,
 852                     obj_res, nprot));
 853         } else if ((dev->driver->driver_features & DRIVER_GEM) != 0) {
 854                 return (drm_gem_mmap_single(dev, offset, size, obj_res, nprot));
 855         } else {
 856                 return (ENODEV);
 857         }
 858 }
 859
 860 #if DRM_LINUX
 861
 862 #include <sys/sysproto.h>
 863
 864 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 865
 866 #define LINUX_IOCTL_DRM_MIN             0x6400
 867 #define LINUX_IOCTL_DRM_MAX             0x64ff
 868
 869 static linux_ioctl_function_t drm_linux_ioctl;
 870 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 871     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 872
 873 /* The bits for in/out are switched on Linux */
 874 #define LINUX_IOC_IN    IOC_OUT
 875 #define LINUX_IOC_OUT   IOC_IN
 876
 877 static int
 878 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 879 {
 880         int error;
 881         int cmd = args->cmd;
 882
 883         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 884         if (cmd & LINUX_IOC_IN)
 885                 args->cmd |= IOC_IN;
 886         if (cmd & LINUX_IOC_OUT)
 887                 args->cmd |= IOC_OUT;
 888
 889         error = ioctl(p, (struct ioctl_args *)args);
 890
 891         return error;
 892 }
 893 #endif /* DRM_LINUX */
 894
 895 static int
 896 drm_core_init(void *arg)
 897 {
 898
 899         drm_global_init();
 900
 901 #if DRM_LINUX
 902         linux_ioctl_register_handler(&drm_handler);
 903 #endif /* DRM_LINUX */
 904
 905         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 906                  CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
 907         return 0;
 908 }
 909
 910 static void
 911 drm_core_exit(void *arg)
 912 {
 913
 914 #if DRM_LINUX
 915         linux_ioctl_unregister_handler(&drm_handler);
 916 #endif /* DRM_LINUX */
 917
 918         drm_global_release();
 919 }
 920
 921 SYSINIT(drm_register, SI_SUB_DRIVERS, SI_ORDER_MIDDLE,
 922     drm_core_init, NULL);
 923 SYSUNINIT(drm_unregister, SI_SUB_DRIVERS, SI_ORDER_MIDDLE,
 924     drm_core_exit, NULL);
 925
 926 /*
 927  * Check if dmi_system_id structure matches system DMI data
 928  */
 929 static bool
 930 dmi_found(const struct dmi_system_id *dsi)
 931 {
 932         int i, slot;
 933         bool found = false;
 934         char *sys_vendor, *board_vendor, *product_name, *board_name;
 935
 936         sys_vendor = kgetenv("smbios.system.maker");
 937         board_vendor = kgetenv("smbios.planar.maker");
 938         product_name = kgetenv("smbios.system.product");
 939         board_name = kgetenv("smbios.planar.product");
 940
 941         for (i = 0; i < NELEM(dsi->matches); i++) {
 942                 slot = dsi->matches[i].slot;
 943                 switch (slot) {
 944                 case DMI_NONE:
 945                         break;
 946                 case DMI_SYS_VENDOR:
 947                         if (sys_vendor != NULL &&
 948                             !strcmp(sys_vendor, dsi->matches[i].substr))
 949                                 break;
 950                         else
 951                                 goto done;
 952                 case DMI_BOARD_VENDOR:
 953                         if (board_vendor != NULL &&
 954                             !strcmp(board_vendor, dsi->matches[i].substr))
 955                                 break;
 956                         else
 957                                 goto done;
 958                 case DMI_PRODUCT_NAME:
 959                         if (product_name != NULL &&
 960                             !strcmp(product_name, dsi->matches[i].substr))
 961                                 break;
 962                         else
 963                                 goto done;
 964                 case DMI_BOARD_NAME:
 965                         if (board_name != NULL &&
 966                             !strcmp(board_name, dsi->matches[i].substr))
 967                                 break;
 968                         else
 969                                 goto done;
 970                 default:
 971                         goto done;
 972                 }
 973         }
 974         found = true;
 975
 976 done:
 977         if (sys_vendor != NULL)
 978                 kfreeenv(sys_vendor);
 979         if (board_vendor != NULL)
 980                 kfreeenv(board_vendor);
 981         if (product_name != NULL)
 982                 kfreeenv(product_name);
 983         if (board_name != NULL)
 984                 kfreeenv(board_name);
 985
 986         return found;
 987 }
 988
 989 bool
 990 dmi_check_system(const struct dmi_system_id *sysid)
 991 {
 992         const struct dmi_system_id *dsi;
 993         int num = 0;
 994
 995         for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) {
 996                 if (dmi_found(dsi)) {
 997                         num++;
 998                         if (dsi->callback && dsi->callback(dsi))
 999                                 break;
1000                 }
1001         }
1002         return (num);
1003 }
1004