wsmux.c revision 1.60
1 /* $NetBSD: wsmux.c,v 1.60 2015/08/24 22:50:33 pooka 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 1.60 2015/08/24 22:50:33 pooka 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 67 #include "opt_wsdisplay_compat.h" 68 69 #include <dev/wscons/wsconsio.h> 70 #include <dev/wscons/wsksymdef.h> 71 #include <dev/wscons/wseventvar.h> 72 #include <dev/wscons/wscons_callbacks.h> 73 #include <dev/wscons/wsmuxvar.h> 74 75 #include "ioconf.h" 76 77 #ifdef WSMUX_DEBUG 78 #define DPRINTF(x) if (wsmuxdebug) printf x 79 #define DPRINTFN(n,x) if (wsmuxdebug > (n)) printf x 80 int wsmuxdebug = 0; 81 #else 82 #define DPRINTF(x) 83 #define DPRINTFN(n,x) 84 #endif 85 86 /* 87 * The wsmux pseudo device is used to multiplex events from several wsmouse, 88 * wskbd, and/or wsmux devices together. 89 * The devices connected together form a tree with muxes in the interior 90 * and real devices (mouse and kbd) at the leaves. The special case of 91 * a tree with one node (mux or other) is supported as well. 92 * Only the device at the root of the tree can be opened (if a non-root 93 * device is opened the subtree rooted at that point is severed from the 94 * containing tree). When the root is opened it allocates a wseventvar 95 * struct which all the nodes in the tree will send their events too. 96 * An ioctl() performed on the root is propagated to all the nodes. 97 * There are also ioctl() operations to add and remove nodes from a tree. 98 */ 99 100 static int wsmux_mux_open(struct wsevsrc *, struct wseventvar *); 101 static int wsmux_mux_close(struct wsevsrc *); 102 103 static void wsmux_do_open(struct wsmux_softc *, struct wseventvar *); 104 105 static void wsmux_do_close(struct wsmux_softc *); 106 #if NWSDISPLAY > 0 107 static int wsmux_evsrc_set_display(device_t, struct wsevsrc *); 108 #else 109 #define wsmux_evsrc_set_display NULL 110 #endif 111 112 static int wsmux_do_displayioctl(device_t dev, u_long cmd, 113 void *data, int flag, struct lwp *l); 114 static int wsmux_do_ioctl(device_t, u_long, void *,int,struct lwp *); 115 116 static int wsmux_add_mux(int, struct wsmux_softc *); 117 118 #define WSMUXDEV(n) ((n) & 0x7f) 119 #define WSMUXCTL(n) ((n) & 0x80) 120 121 dev_type_open(wsmuxopen); 122 dev_type_close(wsmuxclose); 123 dev_type_read(wsmuxread); 124 dev_type_ioctl(wsmuxioctl); 125 dev_type_poll(wsmuxpoll); 126 dev_type_kqfilter(wsmuxkqfilter); 127 128 const struct cdevsw wsmux_cdevsw = { 129 .d_open = wsmuxopen, 130 .d_close = wsmuxclose, 131 .d_read = wsmuxread, 132 .d_write = nowrite, 133 .d_ioctl = wsmuxioctl, 134 .d_stop = nostop, 135 .d_tty = notty, 136 .d_poll = wsmuxpoll, 137 .d_mmap = nommap, 138 .d_kqfilter = wsmuxkqfilter, 139 .d_discard = nodiscard, 140 .d_flag = D_OTHER 141 }; 142 143 struct wssrcops wsmux_srcops = { 144 WSMUX_MUX, 145 wsmux_mux_open, wsmux_mux_close, wsmux_do_ioctl, wsmux_do_displayioctl, 146 wsmux_evsrc_set_display 147 }; 148 149 /* From upper level */ 150 void 151 wsmuxattach(int n) 152 { 153 } 154 155 /* Keep track of all muxes that have been allocated */ 156 static struct wsmux_softc **wsmuxdevs = NULL; 157 static int nwsmux = 0; 158 159 /* Return mux n, create if necessary */ 160 struct wsmux_softc * 161 wsmux_getmux(int n) 162 { 163 struct wsmux_softc *sc; 164 165 n = WSMUXDEV(n); /* limit range */ 166 167 /* Make sure there is room for mux n in the table */ 168 if (n >= nwsmux) { 169 void *new; 170 171 new = realloc(wsmuxdevs, (n + 1) * sizeof(*wsmuxdevs), 172 M_DEVBUF, M_ZERO | M_NOWAIT); 173 if (new == NULL) { 174 printf("wsmux_getmux: no memory for mux %d\n", n); 175 return NULL; 176 } 177 wsmuxdevs = new; 178 nwsmux = n + 1; 179 } 180 181 sc = wsmuxdevs[n]; 182 if (sc == NULL) { 183 sc = wsmux_create("wsmux", n); 184 if (sc == NULL) 185 printf("wsmux: attach out of memory\n"); 186 wsmuxdevs[n] = sc; 187 } 188 return (sc); 189 } 190 191 /* 192 * open() of the pseudo device from device table. 193 */ 194 int 195 wsmuxopen(dev_t dev, int flags, int mode, struct lwp *l) 196 { 197 struct wsmux_softc *sc; 198 struct wseventvar *evar; 199 int minr, unit; 200 201 minr = minor(dev); 202 unit = WSMUXDEV(minr); 203 sc = wsmux_getmux(unit); 204 if (sc == NULL) 205 return (ENXIO); 206 207 DPRINTF(("wsmuxopen: %s: sc=%p l=%p\n", 208 device_xname(sc->sc_base.me_dv), sc, l)); 209 210 if (WSMUXCTL(minr)) { 211 /* This is the control device which does not allow reads. */ 212 if (flags & FREAD) 213 return (EINVAL); 214 return (0); 215 } 216 if ((flags & (FREAD | FWRITE)) == FWRITE) 217 /* Allow write only open */ 218 return (0); 219 220 if (sc->sc_base.me_parent != NULL) { 221 /* Grab the mux out of the greedy hands of the parent mux. */ 222 DPRINTF(("wsmuxopen: detach\n")); 223 wsmux_detach_sc(&sc->sc_base); 224 } 225 226 if (sc->sc_base.me_evp != NULL) 227 /* Already open. */ 228 return (EBUSY); 229 230 evar = &sc->sc_base.me_evar; 231 wsevent_init(evar, l->l_proc); 232 #ifdef WSDISPLAY_COMPAT_RAWKBD 233 sc->sc_rawkbd = 0; 234 #endif 235 236 wsmux_do_open(sc, evar); 237 238 return (0); 239 } 240 241 /* 242 * Open of a mux via the parent mux. 243 */ 244 int 245 wsmux_mux_open(struct wsevsrc *me, struct wseventvar *evar) 246 { 247 struct wsmux_softc *sc = (struct wsmux_softc *)me; 248 249 #ifdef DIAGNOSTIC 250 if (sc->sc_base.me_evp != NULL) { 251 printf("wsmux_mux_open: busy\n"); 252 return (EBUSY); 253 } 254 if (sc->sc_base.me_parent == NULL) { 255 printf("wsmux_mux_open: no parent\n"); 256 return (EINVAL); 257 } 258 #endif 259 260 wsmux_do_open(sc, evar); 261 262 return (0); 263 } 264 265 /* Common part of opening a mux. */ 266 void 267 wsmux_do_open(struct wsmux_softc *sc, struct wseventvar *evar) 268 { 269 struct wsevsrc *me; 270 271 sc->sc_base.me_evp = evar; /* remember event variable, mark as open */ 272 273 /* Open all children. */ 274 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 275 DPRINTF(("wsmuxopen: %s: m=%p dev=%s\n", 276 device_xname(sc->sc_base.me_dv), me, 277 device_xname(me->me_dv))); 278 #ifdef DIAGNOSTIC 279 if (me->me_evp != NULL) { 280 printf("wsmuxopen: dev already in use\n"); 281 continue; 282 } 283 if (me->me_parent != sc) { 284 printf("wsmux_do_open: bad child=%p\n", me); 285 continue; 286 } 287 { 288 int error = wsevsrc_open(me, evar); 289 if (error) { 290 DPRINTF(("wsmuxopen: open failed %d\n", error)); 291 } 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 #ifdef DIAGNOSTIC 350 if (me->me_parent != sc) { 351 printf("wsmuxclose: bad child=%p\n", me); 352 continue; 353 } 354 #endif 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 default: 460 return (EINVAL); 461 } 462 case WSMUXIO_REMOVE_DEVICE: 463 DPRINTF(("%s: rem type=%d, no=%d\n", 464 device_xname(sc->sc_base.me_dv), d->type, d->idx)); 465 /* Locate the device */ 466 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 467 if (me->me_ops->type == d->type && 468 device_unit(me->me_dv) == d->idx) { 469 DPRINTF(("wsmux_do_ioctl: detach\n")); 470 wsmux_detach_sc(me); 471 return (0); 472 } 473 } 474 return (EINVAL); 475 #undef d 476 477 case WSMUXIO_LIST_DEVICES: 478 DPRINTF(("%s: list\n", device_xname(sc->sc_base.me_dv))); 479 l = (struct wsmux_device_list *)data; 480 n = 0; 481 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 482 if (n >= WSMUX_MAXDEV) 483 break; 484 l->devices[n].type = me->me_ops->type; 485 l->devices[n].idx = device_unit(me->me_dv); 486 n++; 487 } 488 l->ndevices = n; 489 return (0); 490 #ifdef WSDISPLAY_COMPAT_RAWKBD 491 case WSKBDIO_SETMODE: 492 sc->sc_rawkbd = *(int *)data; 493 DPRINTF(("wsmux_do_ioctl: save rawkbd = %d\n", sc->sc_rawkbd)); 494 break; 495 #endif 496 497 case WSKBDIO_SETVERSION: 498 case WSMOUSEIO_SETVERSION: 499 case WSDISPLAYIO_SETVERSION: 500 DPRINTF(("%s: WSxxxIO_SETVERSION\n", device_xname(sc->sc_base.me_dv))); 501 evar = sc->sc_base.me_evp; 502 if (evar == NULL) 503 return (EINVAL); 504 return wsevent_setversion(evar, *(int *)data); 505 506 case FIONBIO: 507 DPRINTF(("%s: FIONBIO\n", device_xname(sc->sc_base.me_dv))); 508 return (0); 509 510 case FIOASYNC: 511 DPRINTF(("%s: FIOASYNC\n", device_xname(sc->sc_base.me_dv))); 512 evar = sc->sc_base.me_evp; 513 if (evar == NULL) 514 return (EINVAL); 515 evar->async = *(int *)data != 0; 516 return (0); 517 case FIOSETOWN: 518 DPRINTF(("%s: FIOSETOWN\n", device_xname(sc->sc_base.me_dv))); 519 evar = sc->sc_base.me_evp; 520 if (evar == NULL) 521 return (EINVAL); 522 if (-*(int *)data != evar->io->p_pgid 523 && *(int *)data != evar->io->p_pid) 524 return (EPERM); 525 return (0); 526 case TIOCSPGRP: 527 DPRINTF(("%s: TIOCSPGRP\n", device_xname(sc->sc_base.me_dv))); 528 evar = sc->sc_base.me_evp; 529 if (evar == NULL) 530 return (EINVAL); 531 if (*(int *)data != evar->io->p_pgid) 532 return (EPERM); 533 return (0); 534 default: 535 DPRINTF(("%s: unknown\n", device_xname(sc->sc_base.me_dv))); 536 break; 537 } 538 539 if (sc->sc_base.me_evp == NULL 540 #if NWSDISPLAY > 0 541 && sc->sc_base.me_dispdv == NULL 542 #endif 543 ) 544 return (EACCES); 545 546 /* Return 0 if any of the ioctl() succeeds, otherwise the last error */ 547 error = 0; 548 ok = 0; 549 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 550 #ifdef DIAGNOSTIC 551 /* XXX check evp? */ 552 if (me->me_parent != sc) { 553 printf("wsmux_do_ioctl: bad child %p\n", me); 554 continue; 555 } 556 #endif 557 error = wsevsrc_ioctl(me, cmd, data, flag, lwp); 558 DPRINTF(("wsmux_do_ioctl: %s: me=%p dev=%s ==> %d\n", 559 device_xname(sc->sc_base.me_dv), me, 560 device_xname(me->me_dv), error)); 561 if (!error) 562 ok = 1; 563 } 564 if (ok) { 565 error = 0; 566 if (cmd == WSKBDIO_SETENCODING) { 567 sc->sc_kbd_layout = *((kbd_t *)data); 568 } 569 570 } 571 572 return (error); 573 } 574 575 /* 576 * poll() of the pseudo device from device table. 577 */ 578 int 579 wsmuxpoll(dev_t dev, int events, struct lwp *l) 580 { 581 int minr = minor(dev); 582 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 583 584 if (WSMUXCTL(minr)) { 585 /* control device */ 586 return (0); 587 } 588 589 if (sc->sc_base.me_evp == NULL) { 590 #ifdef DIAGNOSTIC 591 printf("wsmuxpoll: not open\n"); 592 #endif 593 return (POLLHUP); 594 } 595 596 return (wsevent_poll(sc->sc_base.me_evp, events, l)); 597 } 598 599 /* 600 * kqfilter() of the pseudo device from device table. 601 */ 602 int 603 wsmuxkqfilter(dev_t dev, struct knote *kn) 604 { 605 int minr = minor(dev); 606 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 607 608 if (WSMUXCTL(minr)) { 609 /* control device */ 610 return (1); 611 } 612 613 if (sc->sc_base.me_evp == NULL) { 614 #ifdef DIAGNOSTIC 615 printf("wsmuxkqfilter: not open\n"); 616 #endif 617 return (1); 618 } 619 620 return (wsevent_kqfilter(sc->sc_base.me_evp, kn)); 621 } 622 623 /* 624 * Add mux unit as a child to muxsc. 625 */ 626 int 627 wsmux_add_mux(int unit, struct wsmux_softc *muxsc) 628 { 629 struct wsmux_softc *sc, *m; 630 631 sc = wsmux_getmux(unit); 632 if (sc == NULL) 633 return (ENXIO); 634 635 DPRINTF(("wsmux_add_mux: %s(%p) to %s(%p)\n", 636 device_xname(sc->sc_base.me_dv), sc, 637 device_xname(muxsc->sc_base.me_dv), muxsc)); 638 639 if (sc->sc_base.me_parent != NULL || sc->sc_base.me_evp != NULL) 640 return (EBUSY); 641 642 /* The mux we are adding must not be an ancestor of itself. */ 643 for (m = muxsc; m != NULL ; m = m->sc_base.me_parent) 644 if (m == sc) 645 return (EINVAL); 646 647 return (wsmux_attach_sc(muxsc, &sc->sc_base)); 648 } 649 650 /* Create a new mux softc. */ 651 struct wsmux_softc * 652 wsmux_create(const char *name, int unit) 653 { 654 struct wsmux_softc *sc; 655 656 /* XXX This is wrong -- should use autoconfiguraiton framework */ 657 658 DPRINTF(("wsmux_create: allocating\n")); 659 sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT|M_ZERO); 660 if (sc == NULL) 661 return (NULL); 662 sc->sc_base.me_dv = malloc(sizeof(struct device), M_DEVBUF, M_NOWAIT|M_ZERO); 663 if (sc->sc_base.me_dv == NULL) { 664 free(sc, M_DEVBUF); 665 return NULL; 666 } 667 TAILQ_INIT(&sc->sc_cld); 668 snprintf(sc->sc_base.me_dv->dv_xname, sizeof sc->sc_base.me_dv->dv_xname, 669 "%s%d", name, unit); 670 sc->sc_base.me_dv->dv_private = sc; 671 sc->sc_base.me_dv->dv_unit = unit; 672 sc->sc_base.me_ops = &wsmux_srcops; 673 sc->sc_kbd_layout = KB_NONE; 674 return (sc); 675 } 676 677 /* Attach me as a child to sc. */ 678 int 679 wsmux_attach_sc(struct wsmux_softc *sc, struct wsevsrc *me) 680 { 681 int error; 682 683 if (sc == NULL) 684 return (EINVAL); 685 686 DPRINTF(("wsmux_attach_sc: %s(%p): type=%d\n", 687 device_xname(sc->sc_base.me_dv), sc, me->me_ops->type)); 688 689 #ifdef DIAGNOSTIC 690 if (me->me_parent != NULL) { 691 printf("wsmux_attach_sc: busy\n"); 692 return (EBUSY); 693 } 694 #endif 695 me->me_parent = sc; 696 TAILQ_INSERT_TAIL(&sc->sc_cld, me, me_next); 697 698 error = 0; 699 #if NWSDISPLAY > 0 700 if (sc->sc_base.me_dispdv != NULL) { 701 /* This is a display mux, so attach the new device to it. */ 702 DPRINTF(("wsmux_attach_sc: %s: set display %p\n", 703 device_xname(sc->sc_base.me_dv), 704 sc->sc_base.me_dispdv)); 705 if (me->me_ops->dsetdisplay != NULL) { 706 error = wsevsrc_set_display(me, &sc->sc_base); 707 /* Ignore that the console already has a display. */ 708 if (error == EBUSY) 709 error = 0; 710 if (!error) { 711 #ifdef WSDISPLAY_COMPAT_RAWKBD 712 DPRINTF(("wsmux_attach_sc: %s set rawkbd=%d\n", 713 device_xname(me->me_dv), 714 sc->sc_rawkbd)); 715 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 716 &sc->sc_rawkbd, 0, 0); 717 #endif 718 if (sc->sc_kbd_layout != KB_NONE) 719 (void)wsevsrc_ioctl(me, 720 WSKBDIO_SETENCODING, 721 &sc->sc_kbd_layout, FWRITE, 0); 722 } 723 } 724 } 725 #endif 726 if (sc->sc_base.me_evp != NULL) { 727 /* Mux is open, so open the new subdevice */ 728 DPRINTF(("wsmux_attach_sc: %s: calling open of %s\n", 729 device_xname(sc->sc_base.me_dv), 730 device_xname(me->me_dv))); 731 error = wsevsrc_open(me, sc->sc_base.me_evp); 732 } else { 733 DPRINTF(("wsmux_attach_sc: %s not open\n", 734 device_xname(sc->sc_base.me_dv))); 735 } 736 737 if (error) { 738 me->me_parent = NULL; 739 TAILQ_REMOVE(&sc->sc_cld, me, me_next); 740 } 741 742 DPRINTF(("wsmux_attach_sc: %s(%p) done, error=%d\n", 743 device_xname(sc->sc_base.me_dv), sc, error)); 744 return (error); 745 } 746 747 /* Remove me from the parent. */ 748 void 749 wsmux_detach_sc(struct wsevsrc *me) 750 { 751 struct wsmux_softc *sc = me->me_parent; 752 753 DPRINTF(("wsmux_detach_sc: %s(%p) parent=%p\n", 754 device_xname(me->me_dv), me, sc)); 755 756 #ifdef DIAGNOSTIC 757 if (sc == NULL) { 758 printf("wsmux_detach_sc: %s has no parent\n", 759 device_xname(me->me_dv)); 760 return; 761 } 762 #endif 763 764 #if NWSDISPLAY > 0 765 if (sc->sc_base.me_dispdv != NULL) { 766 if (me->me_ops->dsetdisplay != NULL) 767 /* ignore error, there's nothing we can do */ 768 (void)wsevsrc_set_display(me, NULL); 769 } else 770 #endif 771 if (me->me_evp != NULL) { 772 DPRINTF(("wsmux_detach_sc: close\n")); 773 /* mux device is open, so close multiplexee */ 774 (void)wsevsrc_close(me); 775 } 776 777 TAILQ_REMOVE(&sc->sc_cld, me, me_next); 778 me->me_parent = NULL; 779 780 DPRINTF(("wsmux_detach_sc: done sc=%p\n", sc)); 781 } 782 783 /* 784 * Display ioctl() of a mux via the parent mux. 785 */ 786 int 787 wsmux_do_displayioctl(device_t dv, u_long cmd, void *data, int flag, 788 struct lwp *l) 789 { 790 struct wsmux_softc *sc = device_private(dv); 791 struct wsevsrc *me; 792 int error, ok; 793 794 DPRINTF(("wsmux_displayioctl: %s: sc=%p, cmd=%08lx\n", 795 device_xname(sc->sc_base.me_dv), sc, cmd)); 796 797 #ifdef WSDISPLAY_COMPAT_RAWKBD 798 if (cmd == WSKBDIO_SETMODE) { 799 sc->sc_rawkbd = *(int *)data; 800 DPRINTF(("wsmux_displayioctl: rawkbd = %d\n", sc->sc_rawkbd)); 801 } 802 #endif 803 804 /* 805 * Return 0 if any of the ioctl() succeeds, otherwise the last error. 806 * Return EPASSTHROUGH if no mux component accepts the ioctl. 807 */ 808 error = EPASSTHROUGH; 809 ok = 0; 810 TAILQ_FOREACH(me, &sc->sc_cld, me_next) { 811 DPRINTF(("wsmux_displayioctl: me=%p\n", me)); 812 #ifdef DIAGNOSTIC 813 if (me->me_parent != sc) { 814 printf("wsmux_displayioctl: bad child %p\n", me); 815 continue; 816 } 817 #endif 818 if (me->me_ops->ddispioctl != NULL) { 819 error = wsevsrc_display_ioctl(me, cmd, data, flag, l); 820 DPRINTF(("wsmux_displayioctl: me=%p dev=%s ==> %d\n", 821 me, device_xname(me->me_dv), error)); 822 if (!error) 823 ok = 1; 824 } 825 } 826 if (ok) 827 error = 0; 828 829 return (error); 830 } 831 832 #if NWSDISPLAY > 0 833 /* 834 * Set display of a mux via the parent mux. 835 */ 836 int 837 wsmux_evsrc_set_display(device_t dv, struct wsevsrc *ame) 838 { 839 struct wsmux_softc *muxsc = (struct wsmux_softc *)ame; 840 struct wsmux_softc *sc = device_private(dv); 841 device_t displaydv = muxsc ? muxsc->sc_base.me_dispdv : NULL; 842 843 DPRINTF(("wsmux_set_display: %s: displaydv=%p\n", 844 device_xname(sc->sc_base.me_dv), displaydv)); 845 846 if (displaydv != NULL) { 847 if (sc->sc_base.me_dispdv != NULL) 848 return (EBUSY); 849 } else { 850 if (sc->sc_base.me_dispdv == NULL) 851 return (ENXIO); 852 } 853 854 return wsmux_set_display(sc, displaydv); 855 } 856 857 int 858 wsmux_set_display(struct wsmux_softc *sc, device_t displaydv) 859 { 860 device_t odisplaydv; 861 struct wsevsrc *me; 862 struct wsmux_softc *nsc = displaydv ? sc : NULL; 863 int error, ok; 864 865 odisplaydv = sc->sc_base.me_dispdv; 866 sc->sc_base.me_dispdv = displaydv; 867 868 if (displaydv) 869 aprint_verbose_dev(sc->sc_base.me_dv, "connecting to %s\n", 870 device_xname(displaydv)); 871 ok = 0; 872 error = 0; 873 TAILQ_FOREACH(me, &sc->sc_cld,me_next) { 874 #ifdef DIAGNOSTIC 875 if (me->me_parent != sc) { 876 printf("wsmux_set_display: bad child parent %p\n", me); 877 continue; 878 } 879 #endif 880 if (me->me_ops->dsetdisplay != NULL) { 881 error = wsevsrc_set_display(me, &nsc->sc_base); 882 DPRINTF(("wsmux_set_display: m=%p dev=%s error=%d\n", 883 me, device_xname(me->me_dv), error)); 884 if (!error) { 885 ok = 1; 886 #ifdef WSDISPLAY_COMPAT_RAWKBD 887 DPRINTF(("wsmux_set_display: %s set rawkbd=%d\n", 888 device_xname(me->me_dv), sc->sc_rawkbd)); 889 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 890 &sc->sc_rawkbd, 0, 0); 891 #endif 892 } 893 } 894 } 895 if (ok) 896 error = 0; 897 898 if (displaydv == NULL) 899 aprint_verbose("%s: disconnecting from %s\n", 900 device_xname(sc->sc_base.me_dv), 901 device_xname(odisplaydv)); 902 903 return (error); 904 } 905 #endif /* NWSDISPLAY > 0 */ 906
Indexes created Thu Sep 25 16:09:42 GMT 2025