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sys/dev/wscons/wsmux.c
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1 /* $NetBSD: wsmux.c,v 1.35 2003/09/23 09:16:07 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Author: Lennart Augustsson <augustss@carlstedt.se> 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * wscons mux device. 41 * 42 * The mux device is a collection of real mice and keyboards and acts as 43 * a merge point for all the events from the different real devices. 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: wsmux.c,v 1.35 2003/09/23 09:16:07 simonb Exp $"); 48 49 #include "wsdisplay.h" 50 #include "wsmux.h" 51 #include "wskbd.h" 52 #include "wsmouse.h" 53 54 #include <sys/param.h> 55 #include <sys/conf.h> 56 #include <sys/ioctl.h> 57 #include <sys/fcntl.h> 58 #include <sys/kernel.h> 59 #include <sys/malloc.h> 60 #include <sys/proc.h> 61 #include <sys/queue.h> 62 #include <sys/syslog.h> 63 #include <sys/systm.h> 64 #include <sys/tty.h> 65 #include <sys/signalvar.h> 66 #include <sys/device.h> 67 68 #include "opt_wsdisplay_compat.h" 69 70 #include <dev/wscons/wsconsio.h> 71 #include <dev/wscons/wseventvar.h> 72 #include <dev/wscons/wscons_callbacks.h> 73 #include <dev/wscons/wsmuxvar.h> 74 75 #ifdef WSMUX_DEBUG 76 #define DPRINTF(x) if (wsmuxdebug) printf x 77 #define DPRINTFN(n,x) if (wsmuxdebug > (n)) printf x 78 int wsmuxdebug = 0; 79 #else 80 #define DPRINTF(x) 81 #define DPRINTFN(n,x) 82 #endif 83 84 /* 85 * The wsmux pseudo device is used to multiplex events from several wsmouse, 86 * wskbd, and/or wsmux devices together. 87 * The devices connected together form a tree with muxes in the interior 88 * and real devices (mouse and kbd) at the leaves. The special case of 89 * a tree with one node (mux or other) is supported as well. 90 * Only the device at the root of the tree can be opened (if a non-root 91 * device is opened the subtree rooted at that point is severed from the 92 * containing tree). When the root is opened it allocates a wseventvar 93 * struct which all the nodes in the tree will send their events too. 94 * An ioctl() performed on the root is propagated to all the nodes. 95 * There are also ioctl() operations to add and remove nodes from a tree. 96 */ 97 98 static int wsmux_mux_open(struct wsevsrc *, struct wseventvar *); 99 static int wsmux_mux_close(struct wsevsrc *); 100 101 static void wsmux_do_open(struct wsmux_softc *, struct wseventvar *); 102 103 static void wsmux_do_close(struct wsmux_softc *); 104 #if NWSDISPLAY > 0 105 static int wsmux_evsrc_set_display(struct device *, struct wsevsrc *); 106 #else 107 #define wsmux_evsrc_set_display NULL 108 #endif 109 110 static int wsmux_do_displayioctl(struct device *dev, u_long cmd, 111 caddr_t data, int flag, struct proc *p); 112 static int wsmux_do_ioctl(struct device *, u_long, caddr_t,int,struct proc *); 113 114 static int wsmux_add_mux(int, struct wsmux_softc *); 115 116 void wsmuxattach(int); 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 wsmuxopen, wsmuxclose, wsmuxread, nowrite, wsmuxioctl, 130 nostop, notty, wsmuxpoll, nommap, wsmuxkqfilter, 131 }; 132 133 struct wssrcops wsmux_srcops = { 134 WSMUX_MUX, 135 wsmux_mux_open, wsmux_mux_close, wsmux_do_ioctl, wsmux_do_displayioctl, 136 wsmux_evsrc_set_display 137 }; 138 139 /* From upper level */ 140 void 141 wsmuxattach(int n) 142 { 143 } 144 145 /* Keep track of all muxes that have been allocated */ 146 static int nwsmux = 0; 147 static struct wsmux_softc **wsmuxdevs; 148 149 /* Return mux n, create if necessary */ 150 struct wsmux_softc * 151 wsmux_getmux(int n) 152 { 153 struct wsmux_softc *sc; 154 int i; 155 void *new; 156 157 n = WSMUXDEV(n); /* limit range */ 158 159 /* Make sure there is room for mux n in the table */ 160 if (n >= nwsmux) { 161 i = nwsmux; 162 nwsmux = n + 1; 163 if (i != 0) 164 new = realloc(wsmuxdevs, nwsmux * sizeof (*wsmuxdevs), 165 M_DEVBUF, M_NOWAIT); 166 else 167 new = malloc(nwsmux * sizeof (*wsmuxdevs), 168 M_DEVBUF, M_NOWAIT); 169 if (new == NULL) { 170 printf("wsmux_getmux: no memory for mux %d\n", n); 171 return (NULL); 172 } 173 wsmuxdevs = new; 174 for (; i < nwsmux; i++) 175 wsmuxdevs[i] = NULL; 176 } 177 178 sc = wsmuxdevs[n]; 179 if (sc == NULL) { 180 sc = wsmux_create("wsmux", n); 181 if (sc == NULL) 182 printf("wsmux: attach out of memory\n"); 183 wsmuxdevs[n] = sc; 184 } 185 return (sc); 186 } 187 188 /* 189 * open() of the pseudo device from device table. 190 */ 191 int 192 wsmuxopen(dev_t dev, int flags, int mode, struct proc *p) 193 { 194 struct wsmux_softc *sc; 195 struct wseventvar *evar; 196 int minr, unit; 197 198 minr = minor(dev); 199 unit = WSMUXDEV(minr); 200 sc = wsmux_getmux(unit); 201 if (sc == NULL) 202 return (ENXIO); 203 204 DPRINTF(("wsmuxopen: %s: sc=%p p=%p\n", sc->sc_base.me_dv.dv_xname, 205 sc, p)); 206 207 if (WSMUXCTL(minr)) { 208 /* This is the control device which does not allow reads. */ 209 if (flags & FREAD) 210 return (EINVAL); 211 return (0); 212 } 213 if ((flags & (FREAD | FWRITE)) == FWRITE) 214 /* Allow write only open */ 215 return (0); 216 217 if (sc->sc_base.me_parent != NULL) { 218 /* Grab the mux out of the greedy hands of the parent mux. */ 219 DPRINTF(("wsmuxopen: detach\n")); 220 wsmux_detach_sc(&sc->sc_base); 221 } 222 223 if (sc->sc_base.me_evp != NULL) 224 /* Already open. */ 225 return (EBUSY); 226 227 evar = &sc->sc_base.me_evar; 228 wsevent_init(evar); 229 evar->io = p; 230 #ifdef WSDISPLAY_COMPAT_RAWKBD 231 sc->sc_rawkbd = 0; 232 #endif 233 234 wsmux_do_open(sc, evar); 235 236 return (0); 237 } 238 239 /* 240 * Open of a mux via the parent mux. 241 */ 242 int 243 wsmux_mux_open(struct wsevsrc *me, struct wseventvar *evar) 244 { 245 struct wsmux_softc *sc = (struct wsmux_softc *)me; 246 247 #ifdef DIAGNOSTIC 248 if (sc->sc_base.me_evp != NULL) { 249 printf("wsmux_mux_open: busy\n"); 250 return (EBUSY); 251 } 252 if (sc->sc_base.me_parent == NULL) { 253 printf("wsmux_mux_open: no parent\n"); 254 return (EINVAL); 255 } 256 #endif 257 258 wsmux_do_open(sc, evar); 259 260 return (0); 261 } 262 263 /* Common part of opening a mux. */ 264 void 265 wsmux_do_open(struct wsmux_softc *sc, struct wseventvar *evar) 266 { 267 struct wsevsrc *me; 268 269 sc->sc_base.me_evp = evar; /* remember event variable, mark as open */ 270 271 /* Open all children. */ 272 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 273 DPRINTF(("wsmuxopen: %s: m=%p dev=%s\n", 274 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname)); 275 #ifdef DIAGNOSTIC 276 if (me->me_evp != NULL) { 277 printf("wsmuxopen: dev already in use\n"); 278 continue; 279 } 280 if (me->me_parent != sc) { 281 printf("wsmux_do_open: bad child=%p\n", me); 282 continue; 283 } 284 { 285 int error = wsevsrc_open(me, evar); 286 if (error) { 287 DPRINTF(("wsmuxopen: open failed %d\n", error)); 288 } 289 } 290 #else 291 /* ignore errors, failing children will not be marked open */ 292 (void)wsevsrc_open(me, evar); 293 #endif 294 } 295 } 296 297 /* 298 * close() of the pseudo device from device table. 299 */ 300 int 301 wsmuxclose(dev_t dev, int flags, int mode, struct proc *p) 302 { 303 int minr = minor(dev); 304 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 305 struct wseventvar *evar = sc->sc_base.me_evp; 306 307 if (WSMUXCTL(minr)) 308 /* control device */ 309 return (0); 310 if (evar == NULL) 311 /* Not open for read */ 312 return (0); 313 314 wsmux_do_close(sc); 315 sc->sc_base.me_evp = NULL; 316 wsevent_fini(evar); 317 return (0); 318 } 319 320 /* 321 * Close of a mux via the parent mux. 322 */ 323 int 324 wsmux_mux_close(struct wsevsrc *me) 325 { 326 me->me_evp = NULL; 327 wsmux_do_close((struct wsmux_softc *)me); 328 return (0); 329 } 330 331 /* Common part of closing a mux. */ 332 void 333 wsmux_do_close(struct wsmux_softc *sc) 334 { 335 struct wsevsrc *me; 336 337 DPRINTF(("wsmuxclose: %s: sc=%p\n", sc->sc_base.me_dv.dv_xname, sc)); 338 339 /* Close all the children. */ 340 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 341 DPRINTF(("wsmuxclose %s: m=%p dev=%s\n", 342 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname)); 343 #ifdef DIAGNOSTIC 344 if (me->me_parent != sc) { 345 printf("wsmuxclose: bad child=%p\n", me); 346 continue; 347 } 348 #endif 349 (void)wsevsrc_close(me); 350 me->me_evp = NULL; 351 } 352 } 353 354 /* 355 * read() of the pseudo device from device table. 356 */ 357 int 358 wsmuxread(dev_t dev, struct uio *uio, int flags) 359 { 360 int minr = minor(dev); 361 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 362 struct wseventvar *evar; 363 int error; 364 365 if (WSMUXCTL(minr)) { 366 /* control device */ 367 return (EINVAL); 368 } 369 370 evar = sc->sc_base.me_evp; 371 if (evar == NULL) { 372 #ifdef DIAGNOSTIC 373 /* XXX can we get here? */ 374 printf("wsmuxread: not open\n"); 375 #endif 376 return (EINVAL); 377 } 378 379 DPRINTFN(5,("wsmuxread: %s event read evar=%p\n", 380 sc->sc_base.me_dv.dv_xname, evar)); 381 error = wsevent_read(evar, uio, flags); 382 DPRINTFN(5,("wsmuxread: %s event read ==> error=%d\n", 383 sc->sc_base.me_dv.dv_xname, error)); 384 return (error); 385 } 386 387 /* 388 * ioctl of the pseudo device from device table. 389 */ 390 int 391 wsmuxioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 392 { 393 int u = WSMUXDEV(minor(dev)); 394 395 return wsmux_do_ioctl(&wsmuxdevs[u]->sc_base.me_dv, cmd, data, flag, p); 396 } 397 398 /* 399 * ioctl of a mux via the parent mux, continuation of wsmuxioctl(). 400 */ 401 int 402 wsmux_do_ioctl(struct device *dv, u_long cmd, caddr_t data, int flag, 403 struct proc *p) 404 { 405 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 406 struct wsevsrc *me; 407 int error, ok; 408 int s, put, get, n; 409 struct wseventvar *evar; 410 struct wscons_event *ev; 411 struct timeval thistime; 412 struct wsmux_device_list *l; 413 414 DPRINTF(("wsmux_do_ioctl: %s: enter sc=%p, cmd=%08lx\n", 415 sc->sc_base.me_dv.dv_xname, sc, cmd)); 416 417 switch (cmd) { 418 case WSMUXIO_INJECTEVENT: 419 /* Inject an event, e.g., from moused. */ 420 DPRINTF(("%s: inject\n", sc->sc_base.me_dv.dv_xname)); 421 422 evar = sc->sc_base.me_evp; 423 if (evar == NULL) { 424 /* No event sink, so ignore it. */ 425 DPRINTF(("wsmux_do_ioctl: event ignored\n")); 426 return (0); 427 } 428 429 s = spltty(); 430 get = evar->get; 431 put = evar->put; 432 ev = &evar->q[put]; 433 if (++put % WSEVENT_QSIZE == get) { 434 put--; 435 splx(s); 436 return (ENOSPC); 437 } 438 if (put >= WSEVENT_QSIZE) 439 put = 0; 440 *ev = *(struct wscons_event *)data; 441 microtime(&thistime); 442 TIMEVAL_TO_TIMESPEC(&thistime, &ev->time); 443 evar->put = put; 444 WSEVENT_WAKEUP(evar); 445 splx(s); 446 return (0); 447 case WSMUXIO_ADD_DEVICE: 448 #define d ((struct wsmux_device *)data) 449 DPRINTF(("%s: add type=%d, no=%d\n", sc->sc_base.me_dv.dv_xname, 450 d->type, d->idx)); 451 switch (d->type) { 452 #if NWSMOUSE > 0 453 case WSMUX_MOUSE: 454 return (wsmouse_add_mux(d->idx, sc)); 455 #endif 456 #if NWSKBD > 0 457 case WSMUX_KBD: 458 return (wskbd_add_mux(d->idx, sc)); 459 #endif 460 case WSMUX_MUX: 461 return (wsmux_add_mux(d->idx, sc)); 462 default: 463 return (EINVAL); 464 } 465 case WSMUXIO_REMOVE_DEVICE: 466 DPRINTF(("%s: rem type=%d, no=%d\n", sc->sc_base.me_dv.dv_xname, 467 d->type, d->idx)); 468 /* Locate the device */ 469 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 470 if (me->me_ops->type == d->type && 471 me->me_dv.dv_unit == d->idx) { 472 DPRINTF(("wsmux_do_ioctl: detach\n")); 473 wsmux_detach_sc(me); 474 return (0); 475 } 476 } 477 return (EINVAL); 478 #undef d 479 480 case WSMUXIO_LIST_DEVICES: 481 DPRINTF(("%s: list\n", sc->sc_base.me_dv.dv_xname)); 482 l = (struct wsmux_device_list *)data; 483 n = 0; 484 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 485 if (n >= WSMUX_MAXDEV) 486 break; 487 l->devices[n].type = me->me_ops->type; 488 l->devices[n].idx = me->me_dv.dv_unit; 489 n++; 490 } 491 l->ndevices = n; 492 return (0); 493 #ifdef WSDISPLAY_COMPAT_RAWKBD 494 case WSKBDIO_SETMODE: 495 sc->sc_rawkbd = *(int *)data; 496 DPRINTF(("wsmux_do_ioctl: save rawkbd = %d\n", sc->sc_rawkbd)); 497 break; 498 #endif 499 case FIONBIO: 500 DPRINTF(("%s: FIONBIO\n", sc->sc_base.me_dv.dv_xname)); 501 return (0); 502 503 case FIOASYNC: 504 DPRINTF(("%s: FIOASYNC\n", sc->sc_base.me_dv.dv_xname)); 505 evar = sc->sc_base.me_evp; 506 if (evar == NULL) 507 return (EINVAL); 508 evar->async = *(int *)data != 0; 509 return (0); 510 case FIOSETOWN: 511 DPRINTF(("%s: FIOSETOWN\n", sc->sc_base.me_dv.dv_xname)); 512 evar = sc->sc_base.me_evp; 513 if (evar == NULL) 514 return (EINVAL); 515 if (-*(int *)data != evar->io->p_pgid 516 && *(int *)data != evar->io->p_pid) 517 return (EPERM); 518 return (0); 519 case TIOCSPGRP: 520 DPRINTF(("%s: TIOCSPGRP\n", sc->sc_base.me_dv.dv_xname)); 521 evar = sc->sc_base.me_evp; 522 if (evar == NULL) 523 return (EINVAL); 524 if (*(int *)data != evar->io->p_pgid) 525 return (EPERM); 526 return (0); 527 default: 528 DPRINTF(("%s: unknown\n", sc->sc_base.me_dv.dv_xname)); 529 break; 530 } 531 532 if (sc->sc_base.me_evp == NULL 533 #if NWSDISPLAY > 0 534 && sc->sc_base.me_dispdv == NULL 535 #endif 536 ) 537 return (EACCES); 538 539 /* Return 0 if any of the ioctl() succeeds, otherwise the last error */ 540 error = 0; 541 ok = 0; 542 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 543 #ifdef DIAGNOSTIC 544 /* XXX check evp? */ 545 if (me->me_parent != sc) { 546 printf("wsmux_do_ioctl: bad child %p\n", me); 547 continue; 548 } 549 #endif 550 error = wsevsrc_ioctl(me, cmd, data, flag, p); 551 DPRINTF(("wsmux_do_ioctl: %s: me=%p dev=%s ==> %d\n", 552 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname, 553 error)); 554 if (!error) 555 ok = 1; 556 } 557 if (ok) 558 error = 0; 559 560 return (error); 561 } 562 563 /* 564 * poll() of the pseudo device from device table. 565 */ 566 int 567 wsmuxpoll(dev_t dev, int events, struct proc *p) 568 { 569 int minr = minor(dev); 570 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 571 572 if (WSMUXCTL(minr)) { 573 /* control device */ 574 return (EINVAL); 575 } 576 577 if (sc->sc_base.me_evp == NULL) { 578 #ifdef DIAGNOSTIC 579 printf("wsmuxpoll: not open\n"); 580 #endif 581 return (EACCES); 582 } 583 584 return (wsevent_poll(sc->sc_base.me_evp, events, p)); 585 } 586 587 /* 588 * kqfilter() of the pseudo device from device table. 589 */ 590 int 591 wsmuxkqfilter(dev_t dev, struct knote *kn) 592 { 593 int minr = minor(dev); 594 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 595 596 if (WSMUXCTL(minr)) { 597 /* control device */ 598 return (1); 599 } 600 601 if (sc->sc_base.me_evp == NULL) { 602 #ifdef DIAGNOSTIC 603 printf("wsmuxkqfilter: not open\n"); 604 #endif 605 return (1); 606 } 607 608 return (wsevent_kqfilter(sc->sc_base.me_evp, kn)); 609 } 610 611 /* 612 * Add mux unit as a child to muxsc. 613 */ 614 int 615 wsmux_add_mux(int unit, struct wsmux_softc *muxsc) 616 { 617 struct wsmux_softc *sc, *m; 618 619 sc = wsmux_getmux(unit); 620 if (sc == NULL) 621 return (ENXIO); 622 623 DPRINTF(("wsmux_add_mux: %s(%p) to %s(%p)\n", 624 sc->sc_base.me_dv.dv_xname, sc, muxsc->sc_base.me_dv.dv_xname, 625 muxsc)); 626 627 if (sc->sc_base.me_parent != NULL || sc->sc_base.me_evp != NULL) 628 return (EBUSY); 629 630 /* The mux we are adding must not be an ancestor of itself. */ 631 for (m = muxsc; m != NULL ; m = m->sc_base.me_parent) 632 if (m == sc) 633 return (EINVAL); 634 635 return (wsmux_attach_sc(muxsc, &sc->sc_base)); 636 } 637 638 /* Create a new mux softc. */ 639 struct wsmux_softc * 640 wsmux_create(const char *name, int unit) 641 { 642 struct wsmux_softc *sc; 643 644 DPRINTF(("wsmux_create: allocating\n")); 645 sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT|M_ZERO); 646 if (sc == NULL) 647 return (NULL); 648 CIRCLEQ_INIT(&sc->sc_cld); 649 snprintf(sc->sc_base.me_dv.dv_xname, sizeof sc->sc_base.me_dv.dv_xname, 650 "%s%d", name, unit); 651 sc->sc_base.me_dv.dv_unit = unit; 652 sc->sc_base.me_ops = &wsmux_srcops; 653 return (sc); 654 } 655 656 /* Attach me as a child to sc. */ 657 int 658 wsmux_attach_sc(struct wsmux_softc *sc, struct wsevsrc *me) 659 { 660 int error; 661 662 if (sc == NULL) 663 return (EINVAL); 664 665 DPRINTF(("wsmux_attach_sc: %s(%p): type=%d\n", 666 sc->sc_base.me_dv.dv_xname, sc, me->me_ops->type)); 667 668 #ifdef DIAGNOSTIC 669 if (me->me_parent != NULL) { 670 printf("wsmux_attach_sc: busy\n"); 671 return (EBUSY); 672 } 673 #endif 674 me->me_parent = sc; 675 CIRCLEQ_INSERT_TAIL(&sc->sc_cld, me, me_next); 676 677 error = 0; 678 #if NWSDISPLAY > 0 679 if (sc->sc_base.me_dispdv != NULL) { 680 /* This is a display mux, so attach the new device to it. */ 681 DPRINTF(("wsmux_attach_sc: %s: set display %p\n", 682 sc->sc_base.me_dv.dv_xname, sc->sc_base.me_dispdv)); 683 if (me->me_ops->dsetdisplay != NULL) { 684 error = wsevsrc_set_display(me, &sc->sc_base); 685 /* Ignore that the console already has a display. */ 686 if (error == EBUSY) 687 error = 0; 688 if (!error) { 689 #ifdef WSDISPLAY_COMPAT_RAWKBD 690 DPRINTF(("wsmux_attach_sc: %s set rawkbd=%d\n", 691 me->me_dv.dv_xname, sc->sc_rawkbd)); 692 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 693 &sc->sc_rawkbd, 0, 0); 694 #endif 695 } 696 } 697 } 698 #endif 699 if (sc->sc_base.me_evp != NULL) { 700 /* Mux is open, so open the new subdevice */ 701 DPRINTF(("wsmux_attach_sc: %s: calling open of %s\n", 702 sc->sc_base.me_dv.dv_xname, me->me_dv.dv_xname)); 703 error = wsevsrc_open(me, sc->sc_base.me_evp); 704 } else { 705 DPRINTF(("wsmux_attach_sc: %s not open\n", 706 sc->sc_base.me_dv.dv_xname)); 707 } 708 709 if (error) { 710 me->me_parent = NULL; 711 CIRCLEQ_REMOVE(&sc->sc_cld, me, me_next); 712 } 713 714 DPRINTF(("wsmux_attach_sc: %s(%p) done, error=%d\n", 715 sc->sc_base.me_dv.dv_xname, sc, error)); 716 return (error); 717 } 718 719 /* Remove me from the parent. */ 720 void 721 wsmux_detach_sc(struct wsevsrc *me) 722 { 723 struct wsmux_softc *sc = me->me_parent; 724 725 DPRINTF(("wsmux_detach_sc: %s(%p) parent=%p\n", 726 me->me_dv.dv_xname, me, sc)); 727 728 #ifdef DIAGNOSTIC 729 if (sc == NULL) { 730 printf("wsmux_detach_sc: %s has no parent\n", 731 me->me_dv.dv_xname); 732 return; 733 } 734 #endif 735 736 #if NWSDISPLAY > 0 737 if (sc->sc_base.me_dispdv != NULL) { 738 if (me->me_ops->dsetdisplay != NULL) 739 /* ignore error, there's nothing we can do */ 740 (void)wsevsrc_set_display(me, NULL); 741 } else 742 #endif 743 if (me->me_evp != NULL) { 744 DPRINTF(("wsmux_detach_sc: close\n")); 745 /* mux device is open, so close multiplexee */ 746 (void)wsevsrc_close(me); 747 } 748 749 CIRCLEQ_REMOVE(&sc->sc_cld, me, me_next); 750 me->me_parent = NULL; 751 752 DPRINTF(("wsmux_detach_sc: done sc=%p\n", sc)); 753 } 754 755 /* 756 * Display ioctl() of a mux via the parent mux. 757 */ 758 int 759 wsmux_do_displayioctl(struct device *dv, u_long cmd, caddr_t data, int flag, 760 struct proc *p) 761 { 762 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 763 struct wsevsrc *me; 764 int error, ok; 765 766 DPRINTF(("wsmux_displayioctl: %s: sc=%p, cmd=%08lx\n", 767 sc->sc_base.me_dv.dv_xname, sc, cmd)); 768 769 #ifdef WSDISPLAY_COMPAT_RAWKBD 770 if (cmd == WSKBDIO_SETMODE) { 771 sc->sc_rawkbd = *(int *)data; 772 DPRINTF(("wsmux_displayioctl: rawkbd = %d\n", sc->sc_rawkbd)); 773 } 774 #endif 775 776 /* 777 * Return 0 if any of the ioctl() succeeds, otherwise the last error. 778 * Return EPASSTHROUGH if no mux component accepts the ioctl. 779 */ 780 error = EPASSTHROUGH; 781 ok = 0; 782 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 783 DPRINTF(("wsmux_displayioctl: me=%p\n", me)); 784 #ifdef DIAGNOSTIC 785 if (me->me_parent != sc) { 786 printf("wsmux_displayioctl: bad child %p\n", me); 787 continue; 788 } 789 #endif 790 if (me->me_ops->ddispioctl != NULL) { 791 error = wsevsrc_display_ioctl(me, cmd, data, flag, p); 792 DPRINTF(("wsmux_displayioctl: me=%p dev=%s ==> %d\n", 793 me, me->me_dv.dv_xname, error)); 794 if (!error) 795 ok = 1; 796 } 797 } 798 if (ok) 799 error = 0; 800 801 return (error); 802 } 803 804 #if NWSDISPLAY > 0 805 /* 806 * Set display of a mux via the parent mux. 807 */ 808 int 809 wsmux_evsrc_set_display(struct device *dv, struct wsevsrc *ame) 810 { 811 struct wsmux_softc *muxsc = (struct wsmux_softc *)ame; 812 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 813 struct device *displaydv = muxsc ? muxsc->sc_base.me_dispdv : NULL; 814 815 DPRINTF(("wsmux_set_display: %s: displaydv=%p\n", 816 sc->sc_base.me_dv.dv_xname, displaydv)); 817 818 if (displaydv != NULL) { 819 if (sc->sc_base.me_dispdv != NULL) 820 return (EBUSY); 821 } else { 822 if (sc->sc_base.me_dispdv == NULL) 823 return (ENXIO); 824 } 825 826 return wsmux_set_display(sc, displaydv); 827 } 828 829 int 830 wsmux_set_display(struct wsmux_softc *sc, struct device *displaydv) 831 { 832 struct device *odisplaydv; 833 struct wsevsrc *me; 834 struct wsmux_softc *nsc = displaydv ? sc : NULL; 835 int error, ok; 836 837 odisplaydv = sc->sc_base.me_dispdv; 838 sc->sc_base.me_dispdv = displaydv; 839 840 if (displaydv) 841 printf("%s: connecting to %s\n", 842 sc->sc_base.me_dv.dv_xname, displaydv->dv_xname); 843 ok = 0; 844 error = 0; 845 CIRCLEQ_FOREACH(me, &sc->sc_cld,me_next) { 846 #ifdef DIAGNOSTIC 847 if (me->me_parent != sc) { 848 printf("wsmux_set_display: bad child parent %p\n", me); 849 continue; 850 } 851 #endif 852 if (me->me_ops->dsetdisplay != NULL) { 853 error = wsevsrc_set_display(me, &nsc->sc_base); 854 DPRINTF(("wsmux_set_display: m=%p dev=%s error=%d\n", 855 me, me->me_dv.dv_xname, error)); 856 if (!error) { 857 ok = 1; 858 #ifdef WSDISPLAY_COMPAT_RAWKBD 859 DPRINTF(("wsmux_set_display: %s set rawkbd=%d\n", 860 me->me_dv.dv_xname, sc->sc_rawkbd)); 861 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 862 &sc->sc_rawkbd, 0, 0); 863 #endif 864 } 865 } 866 } 867 if (ok) 868 error = 0; 869 870 if (displaydv == NULL) 871 printf("%s: disconnecting from %s\n", 872 sc->sc_base.me_dv.dv_xname, odisplaydv->dv_xname); 873 874 return (error); 875 } 876 #endif /* NWSDISPLAY > 0 */
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