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[] = {
 107         DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED),
 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, DRM_UNLOCKED),
 112         DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
 113         DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
 114         DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED),
 115         DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
 116
 117         DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 118         DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 119         DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 120         DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
 121
 122         DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 123         DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
 124
 125         DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 126         DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
 127
 128         DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
 129         DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
 130
 131         DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
 132         DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 133         DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 134         DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
 135         DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 136         DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 137         DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
 138
 139         DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 140         DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 141
 142         DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
 143         DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
 144
 145         DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
 146
 147         DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 148         DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 149         DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
 150         DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
 151         DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
 152         DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma, DRM_AUTH),
 153
 154         DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 155
 156         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 157         DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 158         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 159         DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
 160         DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 161         DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 162         DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 163         DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 164
 165         DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 166         DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 167
 168         DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
 169
 170         DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
 171
 172         DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 173
 174         DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
 175         DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
 176         DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
 177
 178         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 179
 180 #if 0
 181         DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED),
 182         DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED),
 183 #endif
 184
 185         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 186         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 187         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 188         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 189         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 190         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 191         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
 192         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
 193         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 194         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 195         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 196         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 197         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 198         DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 199         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 200         DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 201         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 202         DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 203         DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 204         DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 205         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 206         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 207         DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 208         DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 209         DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 210         DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 211         DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
 212 };
 213
 214 #define DRM_CORE_IOCTL_COUNT    ARRAY_SIZE( drm_ioctls )
 215
 216 static struct dev_ops drm_cdevsw = {
 217         { "drm", 0, D_TRACKCLOSE | D_MPSAFE },
 218         .d_open =       drm_open,
 219         .d_close =      drm_close,
 220         .d_read =       drm_read,
 221         .d_ioctl =      drm_ioctl,
 222         .d_kqfilter =   drm_kqfilter,
 223         .d_mmap =       drm_mmap,
 224         .d_mmap_single = drm_mmap_single,
 225 };
 226
 227 static int drm_msi = 1; /* Enable by default. */
 228 TUNABLE_INT("hw.drm.msi", &drm_msi);
 229 SYSCTL_NODE(_hw, OID_AUTO, drm, CTLFLAG_RW, NULL, "DRM device");
 230 SYSCTL_INT(_hw_drm, OID_AUTO, msi, CTLFLAG_RD, &drm_msi, 1,
 231     "Enable MSI interrupts for drm devices");
 232
 233 static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
 234         {0x8086, 0x2772}, /* Intel i945G        */ \
 235         {0x8086, 0x27A2}, /* Intel i945GM       */ \
 236         {0x8086, 0x27AE}, /* Intel i945GME      */ \
 237         {0, 0}
 238 };
 239
 240 static int drm_msi_is_blacklisted(struct drm_device *dev, unsigned long flags)
 241 {
 242         int i = 0;
 243
 244         if (dev->driver->use_msi != NULL) {
 245                 int use_msi;
 246
 247                 use_msi = dev->driver->use_msi(dev, flags);
 248
 249                 return (!use_msi);
 250         }
 251
 252         /* TODO: Maybe move this to a callback in i915? */
 253         for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
 254                 if ((drm_msi_blacklist[i].vendor == dev->pci_vendor) &&
 255                     (drm_msi_blacklist[i].device == dev->pci_device)) {
 256                         return 1;
 257                 }
 258         }
 259
 260         return 0;
 261 }
 262
 263 int drm_probe(device_t kdev, drm_pci_id_list_t *idlist)
 264 {
 265         drm_pci_id_list_t *id_entry;
 266         int vendor, device;
 267
 268         vendor = pci_get_vendor(kdev);
 269         device = pci_get_device(kdev);
 270
 271         if (pci_get_class(kdev) != PCIC_DISPLAY)
 272                 return ENXIO;
 273
 274         id_entry = drm_find_description(vendor, device, idlist);
 275         if (id_entry != NULL) {
 276                 if (!device_get_desc(kdev)) {
 277                         DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
 278                         device_set_desc(kdev, id_entry->name);
 279                 }
 280                 return 0;
 281         }
 282
 283         return ENXIO;
 284 }
 285
 286 int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
 287 {
 288         struct drm_device *dev;
 289         drm_pci_id_list_t *id_entry;
 290         int unit, error, msicount;
 291         int rid = 0;
 292
 293         unit = device_get_unit(kdev);
 294         dev = device_get_softc(kdev);
 295
 296         if (!strcmp(device_get_name(kdev), "drmsub"))
 297                 dev->dev = device_get_parent(kdev);
 298         else
 299                 dev->dev = kdev;
 300
 301         dev->pci_domain = pci_get_domain(dev->dev);
 302         dev->pci_bus = pci_get_bus(dev->dev);
 303         dev->pci_slot = pci_get_slot(dev->dev);
 304         dev->pci_func = pci_get_function(dev->dev);
 305
 306         dev->pci_vendor = pci_get_vendor(dev->dev);
 307         dev->pci_device = pci_get_device(dev->dev);
 308         dev->pci_subvendor = pci_get_subvendor(dev->dev);
 309         dev->pci_subdevice = pci_get_subdevice(dev->dev);
 310
 311         id_entry = drm_find_description(dev->pci_vendor,
 312             dev->pci_device, idlist);
 313         dev->id_entry = id_entry;
 314
 315         if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) {
 316                 if (drm_msi &&
 317                     !drm_msi_is_blacklisted(dev, dev->id_entry->driver_private)) {
 318                         msicount = pci_msi_count(dev->dev);
 319                         DRM_DEBUG("MSI count = %d\n", msicount);
 320                         if (msicount > 1)
 321                                 msicount = 1;
 322
 323                         if (pci_alloc_msi(dev->dev, &rid, msicount, -1) == 0) {
 324                                 DRM_INFO("MSI enabled %d message(s)\n",
 325                                     msicount);
 326                                 dev->msi_enabled = 1;
 327                                 dev->irqrid = rid;
 328                         }
 329                 }
 330
 331                 dev->irqr = bus_alloc_resource_any(dev->dev, SYS_RES_IRQ,
 332                     &dev->irqrid, RF_SHAREABLE);
 333                 if (!dev->irqr) {
 334                         return (ENOENT);
 335                 }
 336
 337                 dev->irq = (int) rman_get_start(dev->irqr);
 338         }
 339
 340         lockinit(&dev->dev_lock, "drmdev", 0, LK_CANRECURSE);
 341         lwkt_serialize_init(&dev->irq_lock);
 342         lockinit(&dev->event_lock, "drmev", 0, LK_CANRECURSE);
 343         lockinit(&dev->struct_mutex, "drmslk", 0, LK_CANRECURSE);
 344
 345         error = drm_load(dev);
 346         if (error)
 347                 goto error;
 348
 349         error = drm_create_cdevs(kdev);
 350         if (error)
 351                 goto error;
 352
 353         return (error);
 354 error:
 355         if (dev->irqr) {
 356                 bus_release_resource(dev->dev, SYS_RES_IRQ,
 357                     dev->irqrid, dev->irqr);
 358         }
 359         if (dev->msi_enabled) {
 360                 pci_release_msi(dev->dev);
 361         }
 362         return (error);
 363 }
 364
 365 int
 366 drm_create_cdevs(device_t kdev)
 367 {
 368         struct drm_device *dev;
 369         int error, unit;
 370
 371         unit = device_get_unit(kdev);
 372         dev = device_get_softc(kdev);
 373
 374         dev->devnode = make_dev(&drm_cdevsw, unit, DRM_DEV_UID, DRM_DEV_GID,
 375                                 DRM_DEV_MODE, "dri/card%d", unit);
 376         error = 0;
 377         if (error == 0)
 378                 dev->devnode->si_drv1 = dev;
 379         return (error);
 380 }
 381
 382 #ifndef DRM_DEV_NAME
 383 #define DRM_DEV_NAME "drm"
 384 #endif
 385
 386 devclass_t drm_devclass;
 387
 388 drm_pci_id_list_t *drm_find_description(int vendor, int device,
 389     drm_pci_id_list_t *idlist)
 390 {
 391         int i = 0;
 392
 393         for (i = 0; idlist[i].vendor != 0; i++) {
 394                 if ((idlist[i].vendor == vendor) &&
 395                     ((idlist[i].device == device) ||
 396                     (idlist[i].device == 0))) {
 397                         return &idlist[i];
 398                 }
 399         }
 400         return NULL;
 401 }
 402
 403 /**
 404  * Take down the DRM device.
 405  *
 406  * \param dev DRM device structure.
 407  *
 408  * Frees every resource in \p dev.
 409  *
 410  * \sa drm_device
 411  */
 412 int drm_lastclose(struct drm_device * dev)
 413 {
 414         drm_magic_entry_t *pt, *next;
 415
 416         DRM_DEBUG("\n");
 417
 418         if (dev->driver->lastclose != NULL)
 419                 dev->driver->lastclose(dev);
 420
 421         if (!drm_core_check_feature(dev, DRIVER_MODESET) && dev->irq_enabled)
 422                 drm_irq_uninstall(dev);
 423
 424         DRM_LOCK(dev);
 425         if (dev->unique) {
 426                 drm_free(dev->unique, M_DRM);
 427                 dev->unique = NULL;
 428                 dev->unique_len = 0;
 429         }
 430
 431         /* Clear pid list */
 432         if (dev->magicfree.next) {
 433                 list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
 434                         list_del(&pt->head);
 435                         drm_ht_remove_item(&dev->magiclist, &pt->hash_item);
 436                         kfree(pt);
 437                 }
 438                 drm_ht_remove(&dev->magiclist);
 439         }
 440
 441         /* Clear AGP information */
 442         if (dev->agp) {
 443                 drm_agp_mem_t *entry;
 444                 drm_agp_mem_t *nexte;
 445
 446                 /* Remove AGP resources, but leave dev->agp intact until
 447                  * drm_unload is called.
 448                  */
 449                 for (entry = dev->agp->memory; entry; entry = nexte) {
 450                         nexte = entry->next;
 451                         if (entry->bound)
 452                                 drm_agp_unbind_memory(entry->handle);
 453                         drm_agp_free_memory(entry->handle);
 454                         drm_free(entry, M_DRM);
 455                 }
 456                 dev->agp->memory = NULL;
 457
 458                 if (dev->agp->acquired)
 459                         drm_agp_release(dev);
 460
 461                 dev->agp->acquired = 0;
 462                 dev->agp->enabled  = 0;
 463         }
 464         if (dev->sg != NULL) {
 465                 drm_sg_cleanup(dev->sg);
 466                 dev->sg = NULL;
 467         }
 468
 469         drm_dma_takedown(dev);
 470         if (dev->lock.hw_lock) {
 471                 dev->lock.hw_lock = NULL; /* SHM removed */
 472                 dev->lock.file_priv = NULL;
 473                 DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
 474         }
 475         DRM_UNLOCK(dev);
 476
 477         return 0;
 478 }
 479
 480 static int drm_load(struct drm_device *dev)
 481 {
 482         int i, retcode;
 483
 484         DRM_DEBUG("\n");
 485
 486         INIT_LIST_HEAD(&dev->maplist);
 487
 488         drm_mem_init();
 489         drm_sysctl_init(dev);
 490         INIT_LIST_HEAD(&dev->filelist);
 491
 492         dev->counters  = 6;
 493         dev->types[0]  = _DRM_STAT_LOCK;
 494         dev->types[1]  = _DRM_STAT_OPENS;
 495         dev->types[2]  = _DRM_STAT_CLOSES;
 496         dev->types[3]  = _DRM_STAT_IOCTLS;
 497         dev->types[4]  = _DRM_STAT_LOCKS;
 498         dev->types[5]  = _DRM_STAT_UNLOCKS;
 499
 500         for (i = 0; i < DRM_ARRAY_SIZE(dev->counts); i++)
 501                 atomic_set(&dev->counts[i], 0);
 502
 503         INIT_LIST_HEAD(&dev->vblank_event_list);
 504
 505         if (drm_core_has_AGP(dev)) {
 506                 if (drm_device_is_agp(dev))
 507                         dev->agp = drm_agp_init();
 508                 if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
 509                     dev->agp == NULL) {
 510                         DRM_ERROR("Card isn't AGP, or couldn't initialize "
 511                             "AGP.\n");
 512                         retcode = ENOMEM;
 513                         goto error;
 514                 }
 515                 if (dev->agp != NULL && dev->agp->agp_info.ai_aperture_base != 0) {
 516                         if (drm_mtrr_add(dev->agp->agp_info.ai_aperture_base,
 517                             dev->agp->agp_info.ai_aperture_size, DRM_MTRR_WC) == 0)
 518                                 dev->agp->agp_mtrr = 1;
 519                 }
 520         }
 521
 522         retcode = drm_ctxbitmap_init(dev);
 523         if (retcode != 0) {
 524                 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
 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->dev))
 543                         DRM_ERROR("Request to enable bus-master failed.\n");
 544                 DRM_UNLOCK(dev);
 545                 if (retcode != 0)
 546                         goto error1;
 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         drm_gem_destroy(dev);
 560 error:
 561         drm_ctxbitmap_cleanup(dev);
 562         drm_sysctl_cleanup(dev);
 563         DRM_LOCK(dev);
 564         drm_lastclose(dev);
 565         DRM_UNLOCK(dev);
 566         if (dev->devnode != NULL)
 567                 destroy_dev(dev->devnode);
 568
 569         lockuninit(&dev->vbl_lock);
 570         lockuninit(&dev->dev_lock);
 571         lockuninit(&dev->event_lock);
 572         lockuninit(&dev->struct_mutex);
 573
 574         return retcode;
 575 }
 576
 577 /**
 578  * Get version information
 579  *
 580  * \param inode device inode.
 581  * \param filp file pointer.
 582  * \param cmd command.
 583  * \param arg user argument, pointing to a drm_version structure.
 584  * \return zero on success or negative number on failure.
 585  *
 586  * Fills in the version information in \p arg.
 587  */
 588 int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
 589 {
 590         struct drm_version *version = data;
 591         int len;
 592
 593 #define DRM_COPY( name, value )                                         \
 594         len = strlen( value );                                          \
 595         if ( len > name##_len ) len = name##_len;                       \
 596         name##_len = strlen( value );                                   \
 597         if ( len && name ) {                                            \
 598                 if ( DRM_COPY_TO_USER( name, value, len ) )             \
 599                         return EFAULT;                          \
 600         }
 601
 602         version->version_major          = dev->driver->major;
 603         version->version_minor          = dev->driver->minor;
 604         version->version_patchlevel     = dev->driver->patchlevel;
 605
 606         DRM_COPY(version->name, dev->driver->name);
 607         DRM_COPY(version->date, dev->driver->date);
 608         DRM_COPY(version->desc, dev->driver->desc);
 609
 610         return 0;
 611 }
 612
 613 /*
 614  * Stub is needed for devfs
 615  */
 616 int drm_close(struct dev_close_args *ap)
 617 {
 618         return 0;
 619 }
 620
 621 void drm_cdevpriv_dtor(void *cd)
 622 {
 623         struct drm_file *file_priv = cd;
 624         struct drm_device *dev = file_priv->dev;
 625         int retcode = 0;
 626
 627         DRM_DEBUG("open_count = %d\n", dev->open_count);
 628
 629         DRM_LOCK(dev);
 630
 631         if (dev->driver->preclose != NULL)
 632                 dev->driver->preclose(dev, file_priv);
 633
 634         /* ========================================================
 635          * Begin inline drm_release
 636          */
 637
 638         DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
 639             DRM_CURRENTPID, (long)dev->dev, dev->open_count);
 640
 641         if (dev->driver->driver_features & DRIVER_GEM)
 642                 drm_gem_release(dev, file_priv);
 643
 644         if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
 645             && dev->lock.file_priv == file_priv) {
 646                 DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
 647                           DRM_CURRENTPID,
 648                           _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 649                 if (dev->driver->reclaim_buffers_locked != NULL)
 650                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 651
 652                 drm_lock_free(&dev->lock,
 653                     _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
 654
 655                                 /* FIXME: may require heavy-handed reset of
 656                                    hardware at this point, possibly
 657                                    processed via a callback to the X
 658                                    server. */
 659         } else if (dev->driver->reclaim_buffers_locked != NULL &&
 660             dev->lock.hw_lock != NULL) {
 661                 /* The lock is required to reclaim buffers */
 662                 for (;;) {
 663                         if (!dev->lock.hw_lock) {
 664                                 /* Device has been unregistered */
 665                                 retcode = EINTR;
 666                                 break;
 667                         }
 668                         if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
 669                                 dev->lock.file_priv = file_priv;
 670                                 dev->lock.lock_time = jiffies;
 671                                 atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
 672                                 break;  /* Got lock */
 673                         }
 674                         /* Contention */
 675                         retcode = DRM_LOCK_SLEEP(dev, &dev->lock.lock_queue,
 676                             PCATCH, "drmlk2", 0);
 677                         if (retcode)
 678                                 break;
 679                 }
 680                 if (retcode == 0) {
 681                         dev->driver->reclaim_buffers_locked(dev, file_priv);
 682                         drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
 683                 }
 684         }
 685
 686         if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
 687             !dev->driver->reclaim_buffers_locked)
 688                 drm_reclaim_buffers(dev, file_priv);
 689
 690         funsetown(&dev->buf_sigio);
 691
 692         if (dev->driver->postclose != NULL)
 693                 dev->driver->postclose(dev, file_priv);
 694         list_del(&file_priv->lhead);
 695
 696
 697         /* ========================================================
 698          * End inline drm_release
 699          */
 700
 701         atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
 702         device_unbusy(dev->dev);
 703         if (--dev->open_count == 0) {
 704                 retcode = drm_lastclose(dev);
 705         }
 706
 707         DRM_UNLOCK(dev);
 708 }
 709
 710 /**
 711  * Called whenever a process performs an ioctl on /dev/drm.
 712  *
 713  * \param inode device inode.
 714  * \param file_priv DRM file private.
 715  * \param cmd command.
 716  * \param arg user argument.
 717  * \return zero on success or negative number on failure.
 718  *
 719  * Looks up the ioctl function in the ::ioctls table, checking for root
 720  * previleges if so required, and dispatches to the respective function.
 721  */
 722 int drm_ioctl(struct dev_ioctl_args *ap)
 723 {
 724         struct cdev *kdev = ap->a_head.a_dev;
 725         struct drm_device *dev;
 726         struct drm_ioctl_desc *ioctl = NULL;
 727         u_long cmd = ap->a_cmd;
 728         unsigned int nr = DRM_IOCTL_NR(cmd);
 729         int retcode = 0;
 730         caddr_t data = ap->a_data;
 731         struct thread *p = curthread;
 732         int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
 733         int is_driver_ioctl = 0;
 734         struct drm_file *file_priv;
 735
 736         dev = drm_get_device_from_kdev(kdev);
 737
 738         retcode = devfs_get_cdevpriv(ap->a_fp, (void **)&file_priv);
 739         if (retcode !=0) {
 740                 DRM_ERROR("can't find authenticator\n");
 741                 return EINVAL;
 742         }
 743
 744         atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 745
 746         if (drm_device_is_unplugged(dev))
 747                 return -ENODEV;
 748
 749         if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
 750                 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
 751                 return EINVAL;
 752         }
 753
 754         ioctl = &drm_ioctls[nr];
 755         /* It's not a core DRM ioctl, try driver-specific. */
 756         if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 757                 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 758                 nr -= DRM_COMMAND_BASE;
 759                 if (nr > dev->driver->num_ioctls) {
 760                         return EINVAL;
 761                 }
 762                 ioctl = &dev->driver->ioctls[nr];
 763                 is_driver_ioctl = 1;
 764         }
 765
 766         DRM_DEBUG_VERBOSE("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
 767             DRM_CURRENTPID, cmd, nr, (long)dev->dev,
 768             file_priv->authenticated);
 769
 770         /* Do not trust userspace, use our own definition */
 771         func = ioctl->func;
 772
 773         if (func == NULL) {
 774                 DRM_DEBUG("no function\n");
 775                 return EINVAL;
 776         }
 777
 778         if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
 779             ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
 780             ((ioctl->flags & DRM_MASTER) && !file_priv->master))
 781                 return EACCES;
 782
 783         if (is_driver_ioctl) {
 784                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 785                         mutex_lock(&drm_global_mutex);
 786                 /* shared code returns -errno */
 787                 retcode = -func(dev, data, file_priv);
 788                 if ((ioctl->flags & DRM_UNLOCKED) == 0)
 789                         mutex_unlock(&drm_global_mutex);
 790         } else {
 791                 retcode = func(dev, data, file_priv);
 792         }
 793
 794         if (!ioctl)
 795                 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02lx, nr=0x%02x\n",
 796                           DRM_CURRENTPID,
 797                           (long)dev->dev,
 798                           file_priv->authenticated, cmd, nr);
 799
 800         if (retcode)
 801                 DRM_DEBUG("ret = %d\n", retcode);
 802         return retcode;
 803 }
 804
 805 drm_local_map_t *drm_getsarea(struct drm_device *dev)
 806 {
 807         struct drm_map_list *entry;
 808
 809         list_for_each_entry(entry, &dev->maplist, head) {
 810                 if (entry->map && entry->map->type == _DRM_SHM &&
 811                     (entry->map->flags & _DRM_CONTAINS_LOCK)) {
 812                         return entry->map;
 813                 }
 814         }
 815
 816         return NULL;
 817 }
 818
 819 int
 820 drm_add_busid_modesetting(struct drm_device *dev, struct sysctl_ctx_list *ctx,
 821     struct sysctl_oid *top)
 822 {
 823         struct sysctl_oid *oid;
 824
 825         ksnprintf(dev->busid_str, sizeof(dev->busid_str),
 826              "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus,
 827              dev->pci_slot, dev->pci_func);
 828         oid = SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(top), OID_AUTO, "busid",
 829             CTLFLAG_RD, dev->busid_str, 0, NULL);
 830         if (oid == NULL)
 831                 return (ENOMEM);
 832         dev->modesetting = (dev->driver->driver_features & DRIVER_MODESET) != 0;
 833         oid = SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(top), OID_AUTO,
 834             "modesetting", CTLFLAG_RD, &dev->modesetting, 0, NULL);
 835         if (oid == NULL)
 836                 return (ENOMEM);
 837
 838         return (0);
 839 }
 840
 841 int
 842 drm_mmap_single(struct dev_mmap_single_args *ap)
 843 {
 844         struct drm_device *dev;
 845         struct cdev *kdev = ap->a_head.a_dev;
 846         vm_ooffset_t *offset = ap->a_offset;
 847         vm_size_t size = ap->a_size;
 848         struct vm_object **obj_res = ap->a_object;
 849         int nprot = ap->a_nprot;
 850
 851         dev = drm_get_device_from_kdev(kdev);
 852         if (dev->drm_ttm_bdev != NULL) {
 853                 return (ttm_bo_mmap_single(dev->drm_ttm_bdev, offset, size,
 854                     obj_res, nprot));
 855         } else if ((dev->driver->driver_features & DRIVER_GEM) != 0) {
 856                 return (drm_gem_mmap_single(dev, offset, size, obj_res, nprot));
 857         } else {
 858                 return (ENODEV);
 859         }
 860 }
 861
 862 #if DRM_LINUX
 863
 864 #include <sys/sysproto.h>
 865
 866 MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
 867
 868 #define LINUX_IOCTL_DRM_MIN             0x6400
 869 #define LINUX_IOCTL_DRM_MAX             0x64ff
 870
 871 static linux_ioctl_function_t drm_linux_ioctl;
 872 static struct linux_ioctl_handler drm_handler = {drm_linux_ioctl,
 873     LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
 874
 875 /* The bits for in/out are switched on Linux */
 876 #define LINUX_IOC_IN    IOC_OUT
 877 #define LINUX_IOC_OUT   IOC_IN
 878
 879 static int
 880 drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
 881 {
 882         int error;
 883         int cmd = args->cmd;
 884
 885         args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
 886         if (cmd & LINUX_IOC_IN)
 887                 args->cmd |= IOC_IN;
 888         if (cmd & LINUX_IOC_OUT)
 889                 args->cmd |= IOC_OUT;
 890
 891         error = ioctl(p, (struct ioctl_args *)args);
 892
 893         return error;
 894 }
 895 #endif /* DRM_LINUX */
 896
 897 static int
 898 drm_core_init(void *arg)
 899 {
 900
 901         drm_global_init();
 902
 903 #if DRM_LINUX
 904         linux_ioctl_register_handler(&drm_handler);
 905 #endif /* DRM_LINUX */
 906
 907         DRM_INFO("Initialized %s %d.%d.%d %s\n",
 908                  CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
 909         return 0;
 910 }
 911
 912 static void
 913 drm_core_exit(void *arg)
 914 {
 915
 916 #if DRM_LINUX
 917         linux_ioctl_unregister_handler(&drm_handler);
 918 #endif /* DRM_LINUX */
 919
 920         drm_global_release();
 921 }
 922
 923 SYSINIT(drm_register, SI_SUB_DRIVERS, SI_ORDER_MIDDLE,
 924     drm_core_init, NULL);
 925 SYSUNINIT(drm_unregister, SI_SUB_DRIVERS, SI_ORDER_MIDDLE,
 926     drm_core_exit, NULL);
 927
 928 /*
 929  * Check if dmi_system_id structure matches system DMI data
 930  */
 931 static bool
 932 dmi_found(const struct dmi_system_id *dsi)
 933 {
 934         int i, slot;
 935         bool found = false;
 936         char *sys_vendor, *board_vendor, *product_name, *board_name;
 937
 938         sys_vendor = kgetenv("smbios.system.maker");
 939         board_vendor = kgetenv("smbios.planar.maker");
 940         product_name = kgetenv("smbios.system.product");
 941         board_name = kgetenv("smbios.planar.product");
 942
 943         for (i = 0; i < NELEM(dsi->matches); i++) {
 944                 slot = dsi->matches[i].slot;
 945                 switch (slot) {
 946                 case DMI_NONE:
 947                         break;
 948                 case DMI_SYS_VENDOR:
 949                         if (sys_vendor != NULL &&
 950                             !strcmp(sys_vendor, dsi->matches[i].substr))
 951                                 break;
 952                         else
 953                                 goto done;
 954                 case DMI_BOARD_VENDOR:
 955                         if (board_vendor != NULL &&
 956                             !strcmp(board_vendor, dsi->matches[i].substr))
 957                                 break;
 958                         else
 959                                 goto done;
 960                 case DMI_PRODUCT_NAME:
 961                         if (product_name != NULL &&
 962                             !strcmp(product_name, dsi->matches[i].substr))
 963                                 break;
 964                         else
 965                                 goto done;
 966                 case DMI_BOARD_NAME:
 967                         if (board_name != NULL &&
 968                             !strcmp(board_name, dsi->matches[i].substr))
 969                                 break;
 970                         else
 971                                 goto done;
 972                 default:
 973                         goto done;
 974                 }
 975         }
 976         found = true;
 977
 978 done:
 979         if (sys_vendor != NULL)
 980                 kfreeenv(sys_vendor);
 981         if (board_vendor != NULL)
 982                 kfreeenv(board_vendor);
 983         if (product_name != NULL)
 984                 kfreeenv(product_name);
 985         if (board_name != NULL)
 986                 kfreeenv(board_name);
 987
 988         return found;
 989 }
 990
 991 bool
 992 dmi_check_system(const struct dmi_system_id *sysid)
 993 {
 994         const struct dmi_system_id *dsi;
 995         int num = 0;
 996
 997         for (dsi = sysid; dsi->matches[0].slot != 0 ; dsi++) {
 998                 if (dmi_found(dsi)) {
 999                         num++;
1000                         if (dsi->callback && dsi->callback(dsi))
1001                                 break;
1002                 }
1003         }
1004         return (num);
1005 }
1006