wsmux.c revision 1.67
1 /* $NetBSD: wsmux.c,v 1.67 2025/03/23 12:23:49 hans Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Author: Lennart Augustsson <lennart (at) augustsson.net> 8 * Carlstedt Research & Technology 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * wscons mux device. 34 * 35 * The mux device is a collection of real mice and keyboards and acts as 36 * a merge point for all the events from the different real devices. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: wsmux.c,v 1.67 2025/03/23 12:23:49 hans Exp $"); 41 42 #ifdef _KERNEL_OPT 43 #include "opt_compat_netbsd.h" 44 #include "opt_modular.h" 45 #endif 46 47 #include "wsdisplay.h" 48 #include "wsmux.h" 49 #include "wskbd.h" 50 #include "wsmouse.h" 51 52 #include <sys/param.h> 53 #include <sys/conf.h> 54 #include <sys/ioctl.h> 55 #include <sys/poll.h> 56 #include <sys/fcntl.h> 57 #include <sys/kernel.h> 58 #include <sys/malloc.h> 59 #include <sys/proc.h> 60 #include <sys/queue.h> 61 #include <sys/syslog.h> 62 #include <sys/systm.h> 63 #include <sys/tty.h> 64 #include <sys/signalvar.h> 65 #include <sys/device.h> 66 #include <sys/device_impl.h> /* XXX autoconf abuse */ 67 68 #include "opt_wsdisplay_compat.h" 69 70 #include <dev/wscons/wsconsio.h> 71 #include <dev/wscons/wsksymdef.h> 72 #include <dev/wscons/wseventvar.h> 73 #include <dev/wscons/wscons_callbacks.h> 74 #include <dev/wscons/wsmuxvar.h> 75 76 #include "ioconf.h" 77 78 #ifdef WSMUX_DEBUG 79 #define DPRINTF(x) if (wsmuxdebug) printf x 80 #define DPRINTFN(n,x) if (wsmuxdebug > (n)) printf x 81 int wsmuxdebug = 0; 82 #else 83 #define DPRINTF(x) 84 #define DPRINTFN(n,x) 85 #endif 86 87 /* 88 * The wsmux pseudo device is used to multiplex events from several wsmouse, 89 * wskbd, and/or wsmux devices together. 90 * The devices connected together form a tree with muxes in the interior 91 * and real devices (mouse and kbd) at the leaves. The special case of 92 * a tree with one node (mux or other) is supported as well. 93 * Only the device at the root of the tree can be opened (if a non-root 94 * device is opened the subtree rooted at that point is severed from the 95 * containing tree). When the root is opened it allocates a wseventvar 96 * struct which all the nodes in the tree will send their events too. 97 * An ioctl() performed on the root is propagated to all the nodes. 98 * There are also ioctl() operations to add and remove nodes from a tree. 99 */ 100 101 static int wsmux_mux_open(struct wsevsrc *, struct wseventvar *); 102 static int wsmux_mux_close(struct wsevsrc *); 103 104 static void wsmux_do_open(struct wsmux_softc *, struct wseventvar *); 105 106 static void wsmux_do_close(struct wsmux_softc *); 107 #if NWSDISPLAY > 0 108 static int wsmux_evsrc_set_display(device_t, struct wsevsrc *); 109 #else 110 #define wsmux_evsrc_set_display NULL 111 #endif 112 113 static int wsmux_do_displayioctl(device_t dev, u_long cmd, 114 void *data, int flag, struct lwp *l); 115 static int wsmux_do_ioctl(device_t, u_long, void *,int,struct lwp *); 116 117 static int wsmux_add_mux(int, struct wsmux_softc *); 118 119 #define WSMUXDEV(n) ((n) & 0x7f) 120 #define WSMUXCTL(n) ((n) & 0x80) 121 122 dev_type_open(wsmuxopen); 123 dev_type_close(wsmuxclose); 124 dev_type_read(wsmuxread); 125 dev_type_ioctl(wsmuxioctl); 126 dev_type_poll(wsmuxpoll); 127 dev_type_kqfilter(wsmuxkqfilter); 128 129 const struct cdevsw wsmux_cdevsw = { 130 .d_open = wsmuxopen, 131 .d_close = wsmuxclose, 132 .d_read = wsmuxread, 133 .d_write = nowrite, 134 .d_ioctl = wsmuxioctl, 135 .d_stop = nostop, 136 .d_tty = notty, 137 .d_poll = wsmuxpoll, 138 .d_mmap = nommap, 139 .d_kqfilter = wsmuxkqfilter, 140 .d_discard = nodiscard, 141 .d_flag = D_OTHER 142 }; 143 144 struct wssrcops wsmux_srcops = { 145 WSMUX_MUX, 146 wsmux_mux_open, wsmux_mux_close, wsmux_do_ioctl, wsmux_do_displayioctl, 147 wsmux_evsrc_set_display 148 }; 149 150 /* From upper level */ 151 void 152 wsmuxattach(int n) 153 { 154 } 155 156 /* Keep track of all muxes that have been allocated */ 157 static struct wsmux_softc **wsmuxdevs = NULL; 158 static int nwsmux = 0; 159 160 /* Return mux n, create if necessary */ 161 struct wsmux_softc * 162 wsmux_getmux(int n) 163 { 164 struct wsmux_softc *sc; 165 166 n = WSMUXDEV(n); /* limit range */ 167 168 /* Make sure there is room for mux n in the table */ 169 if (n >= nwsmux) { 170 void *new; 171 172 new = realloc(wsmuxdevs, (n + 1) * sizeof(*wsmuxdevs), 173 M_DEVBUF, M_ZERO | M_WAITOK); 174 wsmuxdevs = new; 175 nwsmux = n + 1; 176 } 177 178 sc = wsmuxdevs[n]; 179 if (sc == NULL) { 180 sc = wsmux_create("wsmux", n); 181 wsmuxdevs[n] = sc; 182 } 183 return (sc); 184 } 185 186 /* 187 * open() of the pseudo device from device table. 188 */ 189 int 190 wsmuxopen(dev_t dev, int flags, int mode, struct lwp *l) 191 { 192 struct wsmux_softc *sc; 193 struct wseventvar *evar; 194 int minr, unit; 195 196 minr = minor(dev); 197 unit = WSMUXDEV(minr); 198 sc = wsmux_getmux(unit); 199 if (sc == NULL) 200 return (ENXIO); 201 202 DPRINTF(("wsmuxopen: %s: sc=%p l=%p\n", 203 device_xname(sc->sc_base.me_dv), sc, l)); 204 205 if (WSMUXCTL(minr)) { 206 /* This is the control device which does not allow reads. */ 207 if (flags & FREAD) 208 return (EINVAL); 209 return (0); 210 } 211 if ((flags & (FREAD | FWRITE)) == FWRITE) 212 /* Allow write only open */ 213 return (0); 214 215 if (sc->sc_base.me_parent != NULL) { 216 /* Grab the mux out of the greedy hands of the parent mux. */ 217 DPRINTF(("wsmuxopen: detach\n")); 218 wsmux_detach_sc(&sc->sc_base); 219 } 220 221 if (sc->sc_base.me_evp != NULL) 222 /* Already open. */ 223 return (EBUSY); 224 225 evar = &sc->sc_base.me_evar; 226 wsevent_init(evar, l->l_proc); 227 #ifdef WSDISPLAY_COMPAT_RAWKBD 228 sc->sc_rawkbd = 0; 229 #endif 230 231 wsmux_do_open(sc, evar); 232 233 return (0); 234 } 235 236 /* 237 * Open of a mux via the parent mux. 238 */ 239 int 240 wsmux_mux_open(struct wsevsrc *me, struct wseventvar *evar) 241 { 242 struct wsmux_softc *sc = (struct wsmux_softc *)me; 243 244 if (sc->sc_base.me_evp != NULL) { 245 #ifdef DIAGNOSTIC 246 printf("wsmux_mux_open: busy\n"); 247 #endif 248 return (EBUSY); 249 } 250 if (sc->sc_base.me_parent == NULL) { 251 #ifdef DIAGNOSTIC 252 printf("wsmux_mux_open: no parent\n"); 253 #endif 254 return (EINVAL); 255 } 256 257 wsmux_do_open(sc, evar); 258 259 return (0); 260 } 261 262 /* Common part of opening a mux. */ 263 void 264 wsmux_do_open(struct wsmux_softc *sc, struct wseventvar *evar) 265 { 266 struct wsevsrc *me; 267 268 sc->sc_base.me_evp = evar; /* remember event variable, mark as open */ 269 270 /* Open all children. */ 271 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 272 DPRINTF(("wsmuxopen: %s: m=%p dev=%s\n", 273 device_xname(sc->sc_base.me_dv), me, 274 device_xname(me->me_dv))); 275 if (me->me_evp != NULL) { 276 #ifdef DIAGNOSTIC 277 printf("wsmuxopen: dev already in use\n"); 278 #endif 279 continue; 280 } 281 if (me->me_parent != sc) { 282 #ifdef DIAGNOSTIC 283 printf("wsmux_do_open: bad child=%p\n", me); 284 #endif 285 continue; 286 } 287 #ifdef DIAGNOSTIC 288 int error = wsevsrc_open(me, evar); 289 290 if (error) { 291 DPRINTF(("wsmuxopen: open failed %d\n", error)); 292 } 293 #else 294 /* ignore errors, failing children will not be marked open */ 295 (void)wsevsrc_open(me, evar); 296 #endif 297 } 298 } 299 300 /* 301 * close() of the pseudo device from device table. 302 */ 303 int 304 wsmuxclose(dev_t dev, int flags, int mode, 305 struct lwp *l) 306 { 307 int minr = minor(dev); 308 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 309 struct wseventvar *evar = sc->sc_base.me_evp; 310 311 if (WSMUXCTL(minr)) 312 /* control device */ 313 return (0); 314 if (evar == NULL) 315 /* Not open for read */ 316 return (0); 317 318 wsmux_do_close(sc); 319 sc->sc_base.me_evp = NULL; 320 wsevent_fini(evar); 321 return (0); 322 } 323 324 /* 325 * Close of a mux via the parent mux. 326 */ 327 int 328 wsmux_mux_close(struct wsevsrc *me) 329 { 330 me->me_evp = NULL; 331 wsmux_do_close((struct wsmux_softc *)me); 332 return (0); 333 } 334 335 /* Common part of closing a mux. */ 336 void 337 wsmux_do_close(struct wsmux_softc *sc) 338 { 339 struct wsevsrc *me; 340 341 DPRINTF(("wsmuxclose: %s: sc=%p\n", 342 device_xname(sc->sc_base.me_dv), sc)); 343 344 /* Close all the children. */ 345 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 346 DPRINTF(("wsmuxclose %s: m=%p dev=%s\n", 347 device_xname(sc->sc_base.me_dv), me, 348 device_xname(me->me_dv))); 349 if (me->me_parent != sc) { 350 #ifdef DIAGNOSTIC 351 printf("wsmuxclose: bad child=%p\n", me); 352 #endif 353 continue; 354 } 355 (void)wsevsrc_close(me); 356 me->me_evp = NULL; 357 } 358 } 359 360 /* 361 * read() of the pseudo device from device table. 362 */ 363 int 364 wsmuxread(dev_t dev, struct uio *uio, int flags) 365 { 366 int minr = minor(dev); 367 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 368 struct wseventvar *evar; 369 int error; 370 371 if (WSMUXCTL(minr)) { 372 /* control device */ 373 return (EINVAL); 374 } 375 376 evar = sc->sc_base.me_evp; 377 if (evar == NULL) { 378 #ifdef DIAGNOSTIC 379 /* XXX can we get here? */ 380 printf("wsmuxread: not open\n"); 381 #endif 382 return (EINVAL); 383 } 384 385 DPRINTFN(5,("wsmuxread: %s event read evar=%p\n", 386 device_xname(sc->sc_base.me_dv), evar)); 387 error = wsevent_read(evar, uio, flags); 388 DPRINTFN(5,("wsmuxread: %s event read ==> error=%d\n", 389 device_xname(sc->sc_base.me_dv), error)); 390 return (error); 391 } 392 393 /* 394 * ioctl of the pseudo device from device table. 395 */ 396 int 397 wsmuxioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 398 { 399 int u = WSMUXDEV(minor(dev)); 400 401 return wsmux_do_ioctl(wsmuxdevs[u]->sc_base.me_dv, cmd, data, flag, l); 402 } 403 404 /* 405 * ioctl of a mux via the parent mux, continuation of wsmuxioctl(). 406 */ 407 int 408 wsmux_do_ioctl(device_t dv, u_long cmd, void *data, int flag, 409 struct lwp *lwp) 410 { 411 struct wsmux_softc *sc = device_private(dv); 412 struct wsevsrc *me; 413 int error, ok; 414 int s, n; 415 struct wseventvar *evar; 416 struct wscons_event event; 417 struct wsmux_device_list *l; 418 419 DPRINTF(("wsmux_do_ioctl: %s: enter sc=%p, cmd=%08lx\n", 420 device_xname(sc->sc_base.me_dv), sc, cmd)); 421 422 switch (cmd) { 423 #if defined(COMPAT_50) || defined(MODULAR) 424 case WSMUXIO_OINJECTEVENT: 425 #endif /* defined(COMPAT_50) || defined(MODULAR) */ 426 case WSMUXIO_INJECTEVENT: 427 /* Inject an event, e.g., from moused. */ 428 DPRINTF(("%s: inject\n", device_xname(sc->sc_base.me_dv))); 429 430 evar = sc->sc_base.me_evp; 431 if (evar == NULL) { 432 /* No event sink, so ignore it. */ 433 DPRINTF(("wsmux_do_ioctl: event ignored\n")); 434 return (0); 435 } 436 437 s = spltty(); 438 event.type = ((struct wscons_event *)data)->type; 439 event.value = ((struct wscons_event *)data)->value; 440 error = wsevent_inject(evar, &event, 1); 441 splx(s); 442 443 return error; 444 case WSMUXIO_ADD_DEVICE: 445 #define d ((struct wsmux_device *)data) 446 DPRINTF(("%s: add type=%d, no=%d\n", 447 device_xname(sc->sc_base.me_dv), d->type, d->idx)); 448 switch (d->type) { 449 #if NWSMOUSE > 0 450 case WSMUX_MOUSE: 451 return (wsmouse_add_mux(d->idx, sc)); 452 #endif 453 #if NWSKBD > 0 454 case WSMUX_KBD: 455 return (wskbd_add_mux(d->idx, sc)); 456 #endif 457 case WSMUX_MUX: 458 return (wsmux_add_mux(d->idx, sc)); 459 case WSMUX_BELL: 460 return (wsbell_add_mux(d->idx, sc)); 461 default: 462 return (EINVAL); 463 } 464 case WSMUXIO_REMOVE_DEVICE: 465 DPRINTF(("%s: rem type=%d, no=%d\n", 466 device_xname(sc->sc_base.me_dv), d->type, d->idx)); 467 /* Locate the device */ 468 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 469 if (me->me_ops->type == d->type && 470 device_unit(me->me_dv) == d->idx) { 471 DPRINTF(("wsmux_do_ioctl: detach\n")); 472 wsmux_detach_sc(me); 473 return (0); 474 } 475 } 476 return (EINVAL); 477 #undef d 478 479 case WSMUXIO_LIST_DEVICES: 480 DPRINTF(("%s: list\n", device_xname(sc->sc_base.me_dv))); 481 l = (struct wsmux_device_list *)data; 482 n = 0; 483 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 484 if (n >= WSMUX_MAXDEV) 485 break; 486 l->devices[n].type = me->me_ops->type; 487 l->devices[n].idx = device_unit(me->me_dv); 488 n++; 489 } 490 l->ndevices = n; 491 return (0); 492 #ifdef WSDISPLAY_COMPAT_RAWKBD 493 case WSKBDIO_SETMODE: 494 sc->sc_rawkbd = *(int *)data; 495 DPRINTF(("wsmux_do_ioctl: save rawkbd = %d\n", sc->sc_rawkbd)); 496 break; 497 #endif 498 499 case WSKBDIO_SETVERSION: 500 case WSMOUSEIO_SETVERSION: 501 case WSDISPLAYIO_SETVERSION: 502 DPRINTF(("%s: WSxxxIO_SETVERSION\n", 503 device_xname(sc->sc_base.me_dv))); 504 evar = sc->sc_base.me_evp; 505 if (evar == NULL) 506 return (EINVAL); 507 return wsevent_setversion(evar, *(int *)data); 508 509 case FIONBIO: 510 DPRINTF(("%s: FIONBIO\n", device_xname(sc->sc_base.me_dv))); 511 return (0); 512 513 case FIOASYNC: 514 DPRINTF(("%s: FIOASYNC\n", device_xname(sc->sc_base.me_dv))); 515 evar = sc->sc_base.me_evp; 516 if (evar == NULL) 517 return (EINVAL); 518 evar->async = *(int *)data != 0; 519 return (0); 520 case FIOSETOWN: 521 DPRINTF(("%s: FIOSETOWN\n", device_xname(sc->sc_base.me_dv))); 522 evar = sc->sc_base.me_evp; 523 if (evar == NULL) 524 return (EINVAL); 525 if (-*(int *)data != evar->io->p_pgid 526 && *(int *)data != evar->io->p_pid) 527 return (EPERM); 528 return (0); 529 case TIOCSPGRP: 530 DPRINTF(("%s: TIOCSPGRP\n", device_xname(sc->sc_base.me_dv))); 531 evar = sc->sc_base.me_evp; 532 if (evar == NULL) 533 return (EINVAL); 534 if (*(int *)data != evar->io->p_pgid) 535 return (EPERM); 536 return (0); 537 default: 538 DPRINTF(("%s: unknown\n", device_xname(sc->sc_base.me_dv))); 539 break; 540 } 541 542 if (sc->sc_base.me_evp == NULL 543 #if NWSDISPLAY > 0 544 && sc->sc_base.me_dispdv == NULL 545 #endif 546 ) 547 return (EACCES); 548 549 /* Return 0 if any of the ioctl() succeeds, otherwise the last error */ 550 error = 0; 551 ok = 0; 552 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 553 /* XXX check evp? */ 554 if (me->me_parent != sc) { 555 #ifdef DIAGNOSTIC 556 printf("wsmux_do_ioctl: bad child %p\n", me); 557 #endif 558 continue; 559 } 560 error = wsevsrc_ioctl(me, cmd, data, flag, lwp); 561 DPRINTF(("wsmux_do_ioctl: %s: me=%p dev=%s ==> %d\n", 562 device_xname(sc->sc_base.me_dv), me, 563 device_xname(me->me_dv), error)); 564 if (!error) 565 ok = 1; 566 } 567 if (ok) { 568 error = 0; 569 if (cmd == WSKBDIO_SETENCODING) { 570 sc->sc_kbd_layout = *((kbd_t *)data); 571 } 572 573 } 574 575 return (error); 576 } 577 578 /* 579 * poll() of the pseudo device from device table. 580 */ 581 int 582 wsmuxpoll(dev_t dev, int events, struct lwp *l) 583 { 584 int minr = minor(dev); 585 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 586 587 if (WSMUXCTL(minr)) { 588 /* control device */ 589 return (0); 590 } 591 592 if (sc->sc_base.me_evp == NULL) { 593 #ifdef DIAGNOSTIC 594 printf("wsmuxpoll: not open\n"); 595 #endif 596 return (POLLHUP); 597 } 598 599 return (wsevent_poll(sc->sc_base.me_evp, events, l)); 600 } 601 602 /* 603 * kqfilter() of the pseudo device from device table. 604 */ 605 int 606 wsmuxkqfilter(dev_t dev, struct knote *kn) 607 { 608 int minr = minor(dev); 609 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 610 611 if (WSMUXCTL(minr)) { 612 /* control device */ 613 return (1); 614 } 615 616 if (sc->sc_base.me_evp == NULL) { 617 #ifdef DIAGNOSTIC 618 printf("wsmuxkqfilter: not open\n"); 619 #endif 620 return (1); 621 } 622 623 return (wsevent_kqfilter(sc->sc_base.me_evp, kn)); 624 } 625 626 /* 627 * Add mux unit as a child to muxsc. 628 */ 629 int 630 wsmux_add_mux(int unit, struct wsmux_softc *muxsc) 631 { 632 struct wsmux_softc *sc, *m; 633 634 sc = wsmux_getmux(unit); 635 if (sc == NULL) 636 return (ENXIO); 637 638 DPRINTF(("wsmux_add_mux: %s(%p) to %s(%p)\n", 639 device_xname(sc->sc_base.me_dv), sc, 640 device_xname(muxsc->sc_base.me_dv), muxsc)); 641 642 if (sc->sc_base.me_parent != NULL || sc->sc_base.me_evp != NULL) 643 return (EBUSY); 644 645 /* The mux we are adding must not be an ancestor of itself. */ 646 for (m = muxsc; m != NULL ; m = m->sc_base.me_parent) 647 if (m == sc) 648 return (EINVAL); 649 650 return (wsmux_attach_sc(muxsc, &sc->sc_base)); 651 } 652 653 /* Create a new mux softc. */ 654 struct wsmux_softc * 655 wsmux_create(const char *name, int unit) 656 { 657 struct wsmux_softc *sc; 658 659 /* XXX This is wrong -- should use autoconfiguration framework */ 660 661 DPRINTF(("wsmux_create: allocating\n")); 662 sc = malloc(sizeof *sc, M_DEVBUF, M_WAITOK|M_ZERO); 663 sc->sc_base.me_dv = malloc(sizeof(struct device), M_DEVBUF, 664 M_WAITOK|M_ZERO); 665 TAILQ_INIT(&sc->sc_cld); 666 snprintf(sc->sc_base.me_dv->dv_xname, 667 sizeof sc->sc_base.me_dv->dv_xname, "%s%d", name, unit); 668 sc->sc_base.me_dv->dv_private = sc; 669 sc->sc_base.me_dv->dv_unit = unit; 670 sc->sc_base.me_ops = &wsmux_srcops; 671 sc->sc_kbd_layout = KB_NONE; 672 return (sc); 673 } 674 675 /* Attach me as a child to sc. */ 676 int 677 wsmux_attach_sc(struct wsmux_softc *sc, struct wsevsrc *me) 678 { 679 int error; 680 681 if (sc == NULL) 682 return (EINVAL); 683 684 DPRINTF(("wsmux_attach_sc: %s(%p): type=%d\n", 685 device_xname(sc->sc_base.me_dv), sc, me->me_ops->type)); 686 687 if (me->me_parent != NULL) { 688 #ifdef DIAGNOSTIC 689 printf("wsmux_attach_sc: busy\n"); 690 #endif 691 return (EBUSY); 692 } 693 me->me_parent = sc; 694 TAILQ_INSERT_TAIL(&sc->sc_cld, me, me_next); 695 696 error = 0; 697 #if NWSDISPLAY > 0 698 if (sc->sc_base.me_dispdv != NULL) { 699 /* This is a display mux, so attach the new device to it. */ 700 DPRINTF(("wsmux_attach_sc: %s: set display %p\n", 701 device_xname(sc->sc_base.me_dv), 702 sc->sc_base.me_dispdv)); 703 if (me->me_ops->dsetdisplay != NULL) { 704 error = wsevsrc_set_display(me, &sc->sc_base); 705 /* Ignore that the console already has a display. */ 706 if (error == EBUSY) 707 error = 0; 708 if (!error) { 709 #ifdef WSDISPLAY_COMPAT_RAWKBD 710 DPRINTF(("wsmux_attach_sc: %s set rawkbd=%d\n", 711 device_xname(me->me_dv), 712 sc->sc_rawkbd)); 713 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 714 &sc->sc_rawkbd, 0, 0); 715 #endif 716 if (sc->sc_kbd_layout != KB_NONE) 717 (void)wsevsrc_ioctl(me, 718 WSKBDIO_SETENCODING, 719 &sc->sc_kbd_layout, FWRITE, 0); 720 } 721 } 722 } 723 #endif 724 if (sc->sc_base.me_evp != NULL) { 725 /* Mux is open, so open the new subdevice */ 726 DPRINTF(("wsmux_attach_sc: %s: calling open of %s\n", 727 device_xname(sc->sc_base.me_dv), 728 device_xname(me->me_dv))); 729 error = wsevsrc_open(me, sc->sc_base.me_evp); 730 } else { 731 DPRINTF(("wsmux_attach_sc: %s not open\n", 732 device_xname(sc->sc_base.me_dv))); 733 } 734 735 if (error) { 736 me->me_parent = NULL; 737 TAILQ_REMOVE(&sc->sc_cld, me, me_next); 738 } 739 740 DPRINTF(("wsmux_attach_sc: %s(%p) done, error=%d\n", 741 device_xname(sc->sc_base.me_dv), sc, error)); 742 return (error); 743 } 744 745 /* Remove me from the parent. */ 746 void 747 wsmux_detach_sc(struct wsevsrc *me) 748 { 749 struct wsmux_softc *sc = me->me_parent; 750 751 DPRINTF(("wsmux_detach_sc: %s(%p) parent=%p\n", 752 device_xname(me->me_dv), me, sc)); 753 754 if (sc == NULL) { 755 #ifdef DIAGNOSTIC 756 printf("wsmux_detach_sc: %s has no parent\n", 757 device_xname(me->me_dv)); 758 #endif 759 return; 760 } 761 762 #if NWSDISPLAY > 0 763 if (sc->sc_base.me_dispdv != NULL) { 764 if (me->me_ops->dsetdisplay != NULL) 765 /* ignore error, there's nothing we can do */ 766 (void)wsevsrc_set_display(me, NULL); 767 } else 768 #endif 769 if (me->me_evp != NULL) { 770 DPRINTF(("wsmux_detach_sc: close\n")); 771 /* mux device is open, so close multiplexee */ 772 (void)wsevsrc_close(me); 773 } 774 775 TAILQ_REMOVE(&sc->sc_cld, me, me_next); 776 me->me_parent = NULL; 777 778 DPRINTF(("wsmux_detach_sc: done sc=%p\n", sc)); 779 } 780 781 /* 782 * Display ioctl() of a mux via the parent mux. 783 */ 784 int 785 wsmux_do_displayioctl(device_t dv, u_long cmd, void *data, int flag, 786 struct lwp *l) 787 { 788 struct wsmux_softc *sc = device_private(dv); 789 struct wsevsrc *me; 790 int error, ok; 791 792 DPRINTF(("wsmux_displayioctl: %s: sc=%p, cmd=%08lx\n", 793 device_xname(sc->sc_base.me_dv), sc, cmd)); 794 795 #ifdef WSDISPLAY_COMPAT_RAWKBD 796 if (cmd == WSKBDIO_SETMODE) { 797 sc->sc_rawkbd = *(int *)data; 798 DPRINTF(("wsmux_displayioctl: rawkbd = %d\n", sc->sc_rawkbd)); 799 } 800 #endif 801 802 /* 803 * Return 0 if any of the ioctl() succeeds, otherwise the last error. 804 * Return EPASSTHROUGH if no mux component accepts the ioctl. 805 */ 806 error = EPASSTHROUGH; 807 ok = 0; 808 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 809 DPRINTF(("wsmux_displayioctl: me=%p\n", me)); 810 if (me->me_parent != sc) { 811 #ifdef DIAGNOSTIC 812 printf("wsmux_displayioctl: bad child %p\n", me); 813 #endif 814 continue; 815 } 816 if (me->me_ops->ddispioctl != NULL) { 817 error = wsevsrc_display_ioctl(me, cmd, data, flag, l); 818 DPRINTF(("wsmux_displayioctl: me=%p dev=%s ==> %d\n", 819 me, device_xname(me->me_dv), error)); 820 if (!error) 821 ok = 1; 822 } 823 } 824 if (ok) 825 error = 0; 826 827 return (error); 828 } 829 830 #if NWSDISPLAY > 0 831 /* 832 * Set display of a mux via the parent mux. 833 */ 834 int 835 wsmux_evsrc_set_display(device_t dv, struct wsevsrc *ame) 836 { 837 struct wsmux_softc *muxsc = (struct wsmux_softc *)ame; 838 struct wsmux_softc *sc = device_private(dv); 839 device_t displaydv = muxsc ? muxsc->sc_base.me_dispdv : NULL; 840 841 DPRINTF(("wsmux_set_display: %s: displaydv=%p\n", 842 device_xname(sc->sc_base.me_dv), displaydv)); 843 844 if (displaydv != NULL) { 845 if (sc->sc_base.me_dispdv != NULL) 846 return (EBUSY); 847 } else { 848 if (sc->sc_base.me_dispdv == NULL) 849 return (ENXIO); 850 } 851 852 return wsmux_set_display(sc, displaydv); 853 } 854 855 int 856 wsmux_set_display(struct wsmux_softc *sc, device_t displaydv) 857 { 858 device_t odisplaydv; 859 struct wsevsrc *me; 860 struct wsmux_softc *nsc = displaydv ? sc : NULL; 861 int error, ok; 862 863 odisplaydv = sc->sc_base.me_dispdv; 864 sc->sc_base.me_dispdv = displaydv; 865 866 if (displaydv) 867 aprint_verbose_dev(sc->sc_base.me_dv, "connecting to %s\n", 868 device_xname(displaydv)); 869 ok = 0; 870 error = 0; 871 TAILQ_FOREACH(me, &sc->sc_cld,me_next) { 872 if (me->me_parent != sc) { 873 #ifdef DIAGNOSTIC 874 printf("wsmux_set_display: bad child parent %p\n", me); 875 #endif 876 continue; 877 } 878 if (me->me_ops->dsetdisplay != NULL) { 879 error = wsevsrc_set_display(me, &nsc->sc_base); 880 DPRINTF(("wsmux_set_display: m=%p dev=%s error=%d\n", 881 me, device_xname(me->me_dv), error)); 882 if (!error) { 883 ok = 1; 884 #ifdef WSDISPLAY_COMPAT_RAWKBD 885 DPRINTF(("wsmux_set_display: %s set rawkbd=%d\n", 886 device_xname(me->me_dv), sc->sc_rawkbd)); 887 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 888 &sc->sc_rawkbd, 0, 0); 889 #endif 890 } 891 } 892 } 893 if (ok) 894 error = 0; 895 896 if (displaydv == NULL) 897 aprint_verbose("%s: disconnecting from %s\n", 898 device_xname(sc->sc_base.me_dv), 899 device_xname(odisplaydv)); 900 901 return (error); 902 } 903 #endif /* NWSDISPLAY > 0 */ 904
Indexes created Wed Sep 24 15:09:51 GMT 2025