sys/dev/video/fb/fb.c

   1 /*-
   2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer as
  10  *    the first lines of this file unmodified.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/dev/fb/fb.c,v 1.11.2.2 2000/08/02 22:35:22 peter Exp $
  29  * $DragonFly: src/sys/dev/video/fb/fb.c,v 1.19 2008/01/09 21:29:11 swildner Exp $
  30  */
  31
  32 #include "opt_fb.h"
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/conf.h>
  37 #include <sys/bus.h>
  38 #include <sys/kernel.h>
  39 #include <sys/malloc.h>
  40 #include <sys/uio.h>
  41 #include <sys/fbio.h>
  42 #include <sys/linker_set.h>
  43 #include <sys/device.h>
  44 #include <sys/thread2.h>
  45
  46 #include <vm/vm.h>
  47 #include <vm/pmap.h>
  48
  49 #include "fbreg.h"
  50
  51 SET_DECLARE(videodriver_set, const video_driver_t);
  52
  53 /* local arrays */
  54
  55 /*
  56  * We need at least one entry each in order to initialize a video card
  57  * for the kernel console.  The arrays will be increased dynamically
  58  * when necessary.
  59  */
  60
  61 static int              vid_malloc;
  62 static int              adapters = 1;
  63 static video_adapter_t  *adp_ini;
  64 static video_adapter_t  **adapter = &adp_ini;
  65 static video_switch_t   *vidsw_ini;
  66        video_switch_t   **vidsw = &vidsw_ini;
  67
  68 #ifdef FB_INSTALL_CDEV
  69 static cdev_t   vidcdevsw_ini;
  70 static cdev_t   *vidcdevsw = &vidcdevsw_ini;
  71 #endif
  72
  73 #define ARRAY_DELTA     4
  74
  75 static int
  76 vid_realloc_array(void)
  77 {
  78         video_adapter_t **new_adp;
  79         video_switch_t **new_vidsw;
  80 #ifdef FB_INSTALL_CDEV
  81         cdev_t *new_cdevsw;
  82 #endif
  83         int newsize;
  84
  85         if (!vid_malloc)
  86                 return ENOMEM;
  87
  88         crit_enter();
  89         newsize = ((adapters + ARRAY_DELTA)/ARRAY_DELTA)*ARRAY_DELTA;
  90         new_adp = kmalloc(sizeof(*new_adp)*newsize, M_DEVBUF, M_WAITOK | M_ZERO);
  91         new_vidsw = kmalloc(sizeof(*new_vidsw)*newsize, M_DEVBUF,
  92             M_WAITOK | M_ZERO);
  93 #ifdef FB_INSTALL_CDEV
  94         new_cdevsw = kmalloc(sizeof(*new_cdevsw)*newsize, M_DEVBUF,
  95             M_WAITOK | M_ZERO);
  96 #endif
  97         bcopy(adapter, new_adp, sizeof(*adapter)*adapters);
  98         bcopy(vidsw, new_vidsw, sizeof(*vidsw)*adapters);
  99 #ifdef FB_INSTALL_CDEV
 100         bcopy(vidcdevsw, new_cdevsw, sizeof(*vidcdevsw)*adapters);
 101 #endif
 102         if (adapters > 1) {
 103                 kfree(adapter, M_DEVBUF);
 104                 kfree(vidsw, M_DEVBUF);
 105 #ifdef FB_INSTALL_CDEV
 106                 kfree(vidcdevsw, M_DEVBUF);
 107 #endif
 108         }
 109         adapter = new_adp;
 110         vidsw = new_vidsw;
 111 #ifdef FB_INSTALL_CDEV
 112         vidcdevsw = new_cdevsw;
 113 #endif
 114         adapters = newsize;
 115         crit_exit();
 116
 117         if (bootverbose)
 118                 kprintf("fb: new array size %d\n", adapters);
 119
 120         return 0;
 121 }
 122
 123 static void
 124 vid_malloc_init(void *arg)
 125 {
 126         vid_malloc = TRUE;
 127 }
 128
 129 SYSINIT(vid_mem, SI_BOOT1_POST, SI_ORDER_ANY, vid_malloc_init, NULL);
 130
 131 /*
 132  * Low-level frame buffer driver functions
 133  * frame buffer subdrivers, such as the VGA driver, call these functions
 134  * to initialize the video_adapter structure and register it to the virtual
 135  * frame buffer driver `fb'.
 136  */
 137
 138 /* initialize the video_adapter_t structure */
 139 void
 140 vid_init_struct(video_adapter_t *adp, char *name, int type, int unit)
 141 {
 142         adp->va_flags = 0;
 143         adp->va_name = name;
 144         adp->va_type = type;
 145         adp->va_unit = unit;
 146 }
 147
 148 /* Register a video adapter */
 149 int
 150 vid_register(video_adapter_t *adp)
 151 {
 152         const video_driver_t **list;
 153         const video_driver_t *p;
 154         int index;
 155
 156         for (index = 0; index < adapters; ++index) {
 157                 if (adapter[index] == NULL)
 158                         break;
 159         }
 160         if (index >= adapters) {
 161                 if (vid_realloc_array())
 162                         return -1;
 163         }
 164
 165         adp->va_index = index;
 166         adp->va_token = NULL;
 167         SET_FOREACH(list, videodriver_set) {
 168                 p = *list;
 169                 if (strcmp(p->name, adp->va_name) == 0) {
 170                         adapter[index] = adp;
 171                         vidsw[index] = p->vidsw;
 172                         return index;
 173                 }
 174         }
 175
 176         return -1;
 177 }
 178
 179 int
 180 vid_unregister(video_adapter_t *adp)
 181 {
 182         if ((adp->va_index < 0) || (adp->va_index >= adapters))
 183                 return ENOENT;
 184         if (adapter[adp->va_index] != adp)
 185                 return ENOENT;
 186
 187         adapter[adp->va_index] = NULL;
 188         vidsw[adp->va_index] = NULL;
 189         return 0;
 190 }
 191
 192 /* Get video I/O function table */
 193 video_switch_t *
 194 vid_get_switch(char *name)
 195 {
 196         const video_driver_t **list;
 197         const video_driver_t *p;
 198
 199         SET_FOREACH(list, videodriver_set) {
 200                 p = *list;
 201                 if (strcmp(p->name, name) == 0)
 202                         return p->vidsw;
 203         }
 204
 205         return NULL;
 206 }
 207
 208 /*
 209  * Video card client functions
 210  * Video card clients, such as the console driver `syscons' and the frame
 211  * buffer cdev driver, use these functions to claim and release a card for
 212  * exclusive use.
 213  */
 214
 215 /* find the video card specified by a driver name and a unit number */
 216 int
 217 vid_find_adapter(char *driver, int unit)
 218 {
 219         int i;
 220
 221         for (i = 0; i < adapters; ++i) {
 222                 if (adapter[i] == NULL)
 223                         continue;
 224                 if (strcmp("*", driver) && strcmp(adapter[i]->va_name, driver))
 225                         continue;
 226                 if ((unit != -1) && (adapter[i]->va_unit != unit))
 227                         continue;
 228                 return i;
 229         }
 230         return -1;
 231 }
 232
 233 /* allocate a video card */
 234 int
 235 vid_allocate(char *driver, int unit, void *id)
 236 {
 237         int index;
 238
 239         crit_enter();
 240         index = vid_find_adapter(driver, unit);
 241         if (index >= 0) {
 242                 if (adapter[index]->va_token) {
 243                         crit_exit();
 244                         return -1;
 245                 }
 246                 adapter[index]->va_token = id;
 247         }
 248         crit_exit();
 249         return index;
 250 }
 251
 252 int
 253 vid_release(video_adapter_t *adp, void *id)
 254 {
 255         int error;
 256
 257         crit_enter();
 258         if (adp->va_token == NULL) {
 259                 error = EINVAL;
 260         } else if (adp->va_token != id) {
 261                 error = EPERM;
 262         } else {
 263                 adp->va_token = NULL;
 264                 error = 0;
 265         }
 266         crit_exit();
 267         return error;
 268 }
 269
 270 /* Get a video adapter structure */
 271 video_adapter_t *
 272 vid_get_adapter(int index)
 273 {
 274         if ((index < 0) || (index >= adapters))
 275                 return NULL;
 276         return adapter[index];
 277 }
 278
 279 /* Configure drivers: this is a backdoor for the console driver XXX */
 280 int
 281 vid_configure(int flags)
 282 {
 283         const video_driver_t **list;
 284         const video_driver_t *p;
 285
 286         SET_FOREACH(list, videodriver_set) {
 287                 p = *list;
 288                 if (p->configure != NULL)
 289                         (*p->configure)(flags);
 290         }
 291
 292         return 0;
 293 }
 294
 295 /*
 296  * Virtual frame buffer cdev driver functions
 297  * The virtual frame buffer driver dispatches driver functions to
 298  * appropriate subdrivers.
 299  */
 300
 301 #define FB_DRIVER_NAME  "fb"
 302
 303 #ifdef FB_INSTALL_CDEV
 304
 305 #if experimental
 306
 307 static devclass_t       fb_devclass;
 308
 309 static int              fbprobe(device_t dev);
 310 static int              fbattach(device_t dev);
 311
 312 static device_method_t fb_methods[] = {
 313         DEVMETHOD(device_probe,         fbprobe),
 314         DEVMETHOD(device_attach,        fbattach),
 315
 316         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 317         { 0, 0 }
 318 };
 319
 320 static driver_t fb_driver = {
 321         FB_DRIVER_NAME,
 322         fb_methods,
 323         0,
 324 };
 325
 326 static int
 327 fbprobe(device_t dev)
 328 {
 329         int unit;
 330
 331         unit = device_get_unit(dev);
 332         if (unit >= adapters)
 333                 return ENXIO;
 334         if (adapter[unit] == NULL)
 335                 return ENXIO;
 336
 337         device_set_desc(dev, "generic frame buffer");
 338         return 0;
 339 }
 340
 341 static int
 342 fbattach(device_t dev)
 343 {
 344         kprintf("fbattach: about to attach children\n");
 345         bus_generic_attach(dev);
 346         return 0;
 347 }
 348
 349 #endif /* experimental */
 350
 351 #define FB_UNIT(dev)    minor(dev)
 352 #define FB_MKMINOR(unit) (u)
 353
 354 static d_default_t      fboperate;
 355 static d_open_t         fbopen;
 356
 357 #define CDEV_MAJOR      123     /* XXX */
 358
 359 static struct dev_ops fb_ops = {
 360         { FB_DRIVER_NAME, CDEV_MAJOR, 0 },
 361         .d_default =    fboperate,
 362         .d_open =       fbopen
 363 };
 364
 365 static void
 366 vfbattach(void *arg)
 367 {
 368         static int fb_devsw_installed = FALSE;
 369
 370         if (!fb_devsw_installed) {
 371 #if 0
 372                 dev_ops_add(&fb_ops, 0, 0);
 373 #endif
 374                 fb_devsw_installed = TRUE;
 375         }
 376 }
 377
 378 PSEUDO_SET(vfbattach, fb);
 379
 380 /*
 381  *  Note: dev represents the actual video device, not the frame buffer
 382  */
 383 int
 384 fb_attach(cdev_t dev, video_adapter_t *adp)
 385 {
 386         if (adp->va_index >= adapters)
 387                 return EINVAL;
 388         if (adapter[adp->va_index] != adp)
 389                 return EINVAL;
 390
 391         crit_enter();
 392         reference_dev(dev);
 393         adp->va_minor = minor(dev);
 394         vidcdevsw[adp->va_index] = dev;
 395         crit_exit();
 396
 397         kprintf("fb%d at %s%d\n", adp->va_index, adp->va_name, adp->va_unit);
 398         return 0;
 399 }
 400
 401 /*
 402  *  Note: dev represents the actual video device, not the frame buffer
 403  */
 404 int
 405 fb_detach(cdev_t dev, video_adapter_t *adp)
 406 {
 407         if (adp->va_index >= adapters)
 408                 return EINVAL;
 409         if (adapter[adp->va_index] != adp)
 410                 return EINVAL;
 411         if (vidcdevsw[adp->va_index] != dev)
 412                 return EINVAL;
 413
 414         crit_enter();
 415         vidcdevsw[adp->va_index] = NULL;
 416         crit_exit();
 417         release_dev(dev);
 418         return 0;
 419 }
 420
 421 static int
 422 fbopen(struct dev_open_args *ap)
 423 {
 424         cdev_t dev = ap->a_head.a_dev;
 425         int unit;
 426         cdev_t fdev;
 427
 428         unit = FB_UNIT(dev);
 429         if (unit < 0 || unit >= adapters)
 430                 return ENXIO;
 431         if ((fdev = vidcdevsw[unit]) == NULL)
 432                 return ENXIO;
 433         return dev_dopen(fdev, ap->a_oflags, ap->a_devtype, ap->a_cred);
 434 }
 435
 436 static int
 437 fboperate(struct dev_generic_args *ap)
 438 {
 439         cdev_t dev = ap->a_dev;
 440         int unit;
 441         cdev_t fdev;
 442
 443         unit = FB_UNIT(dev);
 444         if ((fdev = vidcdevsw[unit]) == NULL)
 445                 return ENXIO;
 446         ap->a_dev = fdev;
 447         return dev_doperate(ap);
 448 }
 449
 450 /*
 451  * Generic frame buffer cdev driver functions
 452  * Frame buffer subdrivers may call these functions to implement common
 453  * driver functions.
 454  */
 455
 456 int genfbopen(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode,
 457               struct ucred *cred)
 458 {
 459         crit_enter();
 460         if (!(sc->gfb_flags & FB_OPEN))
 461                 sc->gfb_flags |= FB_OPEN;
 462         crit_exit();
 463         return 0;
 464 }
 465
 466 int genfbclose(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode)
 467 {
 468         crit_enter();
 469         sc->gfb_flags &= ~FB_OPEN;
 470         crit_exit();
 471         return 0;
 472 }
 473
 474 int genfbread(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio,
 475               int flag)
 476 {
 477         int size;
 478         int offset;
 479         int error;
 480         int len;
 481
 482         error = 0;
 483         size = adp->va_buffer_size/adp->va_info.vi_planes;
 484         while (uio->uio_resid > 0) {
 485                 if (uio->uio_offset >= size)
 486                         break;
 487                 offset = uio->uio_offset%adp->va_window_size;
 488                 len = (int)szmin(uio->uio_resid, size - uio->uio_offset);
 489                 len = imin(len, adp->va_window_size - offset);
 490                 if (len <= 0)
 491                         break;
 492                 (*vidsw[adp->va_index]->set_win_org)(adp, uio->uio_offset);
 493                 error = uiomove((caddr_t)(adp->va_window + offset),
 494                                 (size_t)len, uio);
 495                 if (error)
 496                         break;
 497         }
 498         return error;
 499 }
 500
 501 int genfbwrite(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio,
 502                int flag)
 503 {
 504         return ENODEV;
 505 }
 506
 507 int genfbioctl(genfb_softc_t *sc, video_adapter_t *adp, u_long cmd,
 508                caddr_t arg, int flag, struct ucred *cred)
 509 {
 510         int error;
 511
 512         if (adp == NULL)        /* XXX */
 513                 return ENXIO;
 514         error = (*vidsw[adp->va_index]->ioctl)(adp, cmd, arg);
 515         if (error == ENOIOCTL)
 516                 error = ENODEV;
 517         return error;
 518 }
 519
 520 int genfbmmap(genfb_softc_t *sc, video_adapter_t *adp, vm_offset_t offset,
 521               int prot)
 522 {
 523         return (*vidsw[adp->va_index]->mmap)(adp, offset, prot);
 524 }
 525
 526 #endif /* FB_INSTALL_CDEV */
 527
 528 static char *
 529 adapter_name(int type)
 530 {
 531     static struct {
 532         int type;
 533         char *name;
 534     } names[] = {
 535         { KD_MONO,      "MDA" },
 536         { KD_HERCULES,  "Hercules" },
 537         { KD_CGA,       "CGA" },
 538         { KD_EGA,       "EGA" },
 539         { KD_VGA,       "VGA" },
 540         { KD_TGA,       "TGA" },
 541         { -1,           "Unknown" },
 542     };
 543     int i;
 544
 545     for (i = 0; names[i].type != -1; ++i)
 546         if (names[i].type == type)
 547             break;
 548     return names[i].name;
 549 }
 550
 551 /*
 552  * Generic low-level frame buffer functions
 553  * The low-level functions in the frame buffer subdriver may use these
 554  * functions.
 555  */
 556
 557 void
 558 fb_dump_adp_info(char *driver, video_adapter_t *adp, int level)
 559 {
 560     if (level <= 0)
 561         return;
 562
 563     kprintf("%s%d: %s%d, %s, type:%s (%d), flags:0x%x\n",
 564            FB_DRIVER_NAME, adp->va_index, driver, adp->va_unit, adp->va_name,
 565            adapter_name(adp->va_type), adp->va_type, adp->va_flags);
 566     kprintf("%s%d: port:0x%x-0x%x, mem:0x%x 0x%x\n",
 567            FB_DRIVER_NAME, adp->va_index,
 568            adp->va_io_base, adp->va_io_base + adp->va_io_size - 1,
 569            adp->va_mem_base, adp->va_mem_size);
 570     kprintf("%s%d: init mode:%d, bios mode:%d, current mode:%d\n",
 571            FB_DRIVER_NAME, adp->va_index,
 572            adp->va_initial_mode, adp->va_initial_bios_mode, adp->va_mode);
 573     kprintf("%s%d: window:%p size:%dk gran:%dk, buf:%p size:%dk\n",
 574            FB_DRIVER_NAME, adp->va_index,
 575            (void *)adp->va_window, (int)adp->va_window_size/1024,
 576            (int)adp->va_window_gran/1024, (void *)adp->va_buffer,
 577            (int)adp->va_buffer_size/1024);
 578 }
 579
 580 void
 581 fb_dump_mode_info(char *driver, video_adapter_t *adp, video_info_t *info,
 582                   int level)
 583 {
 584     if (level <= 0)
 585         return;
 586
 587     kprintf("%s%d: %s, mode:%d, flags:0x%x ",
 588            driver, adp->va_unit, adp->va_name, info->vi_mode, info->vi_flags);
 589     if (info->vi_flags & V_INFO_GRAPHICS)
 590         kprintf("G %dx%dx%d, %d plane(s), font:%dx%d, ",
 591                info->vi_width, info->vi_height,
 592                info->vi_depth, info->vi_planes,
 593                info->vi_cwidth, info->vi_cheight);
 594     else
 595         kprintf("T %dx%d, font:%dx%d, ",
 596                info->vi_width, info->vi_height,
 597                info->vi_cwidth, info->vi_cheight);
 598     kprintf("win:0x%x\n", info->vi_window);
 599 }
 600
 601 int
 602 fb_type(int adp_type)
 603 {
 604         static struct {
 605                 int     fb_type;
 606                 int     va_type;
 607         } types[] = {
 608                 { FBTYPE_MDA,           KD_MONO },
 609                 { FBTYPE_HERCULES,      KD_HERCULES },
 610                 { FBTYPE_CGA,           KD_CGA },
 611                 { FBTYPE_EGA,           KD_EGA },
 612                 { FBTYPE_VGA,           KD_VGA },
 613                 { FBTYPE_TGA,           KD_TGA },
 614         };
 615         int i;
 616
 617         for (i = 0; i < sizeof(types)/sizeof(types[0]); ++i) {
 618                 if (types[i].va_type == adp_type)
 619                         return types[i].fb_type;
 620         }
 621         return -1;
 622 }
 623
 624 int
 625 fb_commonioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
 626 {
 627         int error;
 628
 629         /* assert(adp != NULL) */
 630
 631         error = 0;
 632         crit_enter();
 633
 634         switch (cmd) {
 635
 636         case FBIO_ADAPTER:      /* get video adapter index */
 637                 *(int *)arg = adp->va_index;
 638                 break;
 639
 640         case FBIO_ADPTYPE:      /* get video adapter type */
 641                 *(int *)arg = adp->va_type;
 642                 break;
 643
 644         case FBIO_ADPINFO:      /* get video adapter info */
 645                 ((video_adapter_info_t *)arg)->va_index = adp->va_index;
 646                 ((video_adapter_info_t *)arg)->va_type = adp->va_type;
 647                 bcopy(adp->va_name, ((video_adapter_info_t *)arg)->va_name,
 648                       imin(strlen(adp->va_name) + 1,
 649                            sizeof(((video_adapter_info_t *)arg)->va_name)));
 650                 ((video_adapter_info_t *)arg)->va_unit = adp->va_unit;
 651                 ((video_adapter_info_t *)arg)->va_flags = adp->va_flags;
 652                 ((video_adapter_info_t *)arg)->va_io_base = adp->va_io_base;
 653                 ((video_adapter_info_t *)arg)->va_io_size = adp->va_io_size;
 654                 ((video_adapter_info_t *)arg)->va_mem_base = adp->va_mem_base;
 655                 ((video_adapter_info_t *)arg)->va_mem_size = adp->va_mem_size;
 656                 ((video_adapter_info_t *)arg)->va_window
 657 #ifdef __i386__
 658                         = vtophys(adp->va_window);
 659 #else
 660                         = adp->va_window;
 661 #endif
 662                 ((video_adapter_info_t *)arg)->va_window_size
 663                         = adp->va_window_size;
 664                 ((video_adapter_info_t *)arg)->va_window_gran
 665                         = adp->va_window_gran;
 666                 ((video_adapter_info_t *)arg)->va_window_orig
 667                         = adp->va_window_orig;
 668                 ((video_adapter_info_t *)arg)->va_unused0
 669 #ifdef __i386__
 670                         = (adp->va_buffer) ? vtophys(adp->va_buffer) : 0;
 671 #else
 672                         = adp->va_buffer;
 673 #endif
 674                 ((video_adapter_info_t *)arg)->va_buffer_size
 675                         = adp->va_buffer_size;
 676                 ((video_adapter_info_t *)arg)->va_mode = adp->va_mode;
 677                 ((video_adapter_info_t *)arg)->va_initial_mode
 678                         = adp->va_initial_mode;
 679                 ((video_adapter_info_t *)arg)->va_initial_bios_mode
 680                         = adp->va_initial_bios_mode;
 681                 ((video_adapter_info_t *)arg)->va_line_width
 682                         = adp->va_line_width;
 683                 ((video_adapter_info_t *)arg)->va_disp_start.x
 684                         = adp->va_disp_start.x;
 685                 ((video_adapter_info_t *)arg)->va_disp_start.y
 686                         = adp->va_disp_start.y;
 687                 break;
 688
 689         case FBIO_MODEINFO:     /* get mode information */
 690                 error = (*vidsw[adp->va_index]->get_info)(adp,
 691                                 ((video_info_t *)arg)->vi_mode,
 692                                 (video_info_t *)arg);
 693                 if (error)
 694                         error = ENODEV;
 695                 break;
 696
 697         case FBIO_FINDMODE:     /* find a matching video mode */
 698                 error = (*vidsw[adp->va_index]->query_mode)(adp,
 699                                 (video_info_t *)arg);
 700                 break;
 701
 702         case FBIO_GETMODE:      /* get video mode */
 703                 *(int *)arg = adp->va_mode;
 704                 break;
 705
 706         case FBIO_SETMODE:      /* set video mode */
 707                 error = (*vidsw[adp->va_index]->set_mode)(adp, *(int *)arg);
 708                 if (error)
 709                         error = ENODEV; /* EINVAL? */
 710                 break;
 711
 712         case FBIO_GETWINORG:    /* get frame buffer window origin */
 713                 *(u_int *)arg = adp->va_window_orig;
 714                 break;
 715
 716         case FBIO_GETDISPSTART: /* get display start address */
 717                 ((video_display_start_t *)arg)->x = adp->va_disp_start.x;
 718                 ((video_display_start_t *)arg)->y = adp->va_disp_start.y;
 719                 break;
 720
 721         case FBIO_GETLINEWIDTH: /* get scan line width in bytes */
 722                 *(u_int *)arg = adp->va_line_width;
 723                 break;
 724
 725         case FBIO_GETPALETTE:   /* get color palette */
 726         case FBIO_SETPALETTE:   /* set color palette */
 727                 /* XXX */
 728
 729         case FBIOPUTCMAP:
 730         case FBIOGETCMAP:
 731                 /* XXX */
 732
 733         case FBIO_SETWINORG:    /* set frame buffer window origin */
 734         case FBIO_SETDISPSTART: /* set display start address */
 735         case FBIO_SETLINEWIDTH: /* set scan line width in pixel */
 736
 737         case FBIOGTYPE:
 738         case FBIOGATTR:
 739         case FBIOSVIDEO:
 740         case FBIOGVIDEO:
 741         case FBIOSCURSOR:
 742         case FBIOGCURSOR:
 743         case FBIOSCURPOS:
 744         case FBIOGCURPOS:
 745         case FBIOGCURMAX:
 746
 747         default:
 748                 error = ENODEV;
 749                 break;
 750         }
 751
 752         crit_exit();
 753         return error;
 754 }