wsmux.c revision 1.46
1 /* $NetBSD: wsmux.c,v 1.46 2006/11/16 01:33:31 christos 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 * 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 1.46 2006/11/16 01:33:31 christos 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/poll.h> 58 #include <sys/fcntl.h> 59 #include <sys/kernel.h> 60 #include <sys/malloc.h> 61 #include <sys/proc.h> 62 #include <sys/queue.h> 63 #include <sys/syslog.h> 64 #include <sys/systm.h> 65 #include <sys/tty.h> 66 #include <sys/signalvar.h> 67 #include <sys/device.h> 68 69 #include "opt_wsdisplay_compat.h" 70 71 #include <dev/wscons/wsconsio.h> 72 #include <dev/wscons/wsksymdef.h> 73 #include <dev/wscons/wseventvar.h> 74 #include <dev/wscons/wscons_callbacks.h> 75 #include <dev/wscons/wsmuxvar.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(struct device *, struct wsevsrc *); 108 #else 109 #define wsmux_evsrc_set_display NULL 110 #endif 111 112 static int wsmux_do_displayioctl(struct device *dev, u_long cmd, 113 caddr_t data, int flag, struct lwp *l); 114 static int wsmux_do_ioctl(struct device *, u_long, caddr_t,int,struct lwp *); 115 116 static int wsmux_add_mux(int, struct wsmux_softc *); 117 118 void wsmuxattach(int); 119 120 #define WSMUXDEV(n) ((n) & 0x7f) 121 #define WSMUXCTL(n) ((n) & 0x80) 122 123 dev_type_open(wsmuxopen); 124 dev_type_close(wsmuxclose); 125 dev_type_read(wsmuxread); 126 dev_type_ioctl(wsmuxioctl); 127 dev_type_poll(wsmuxpoll); 128 dev_type_kqfilter(wsmuxkqfilter); 129 130 const struct cdevsw wsmux_cdevsw = { 131 wsmuxopen, wsmuxclose, wsmuxread, nowrite, wsmuxioctl, 132 nostop, notty, wsmuxpoll, nommap, wsmuxkqfilter, D_OTHER 133 }; 134 135 struct wssrcops wsmux_srcops = { 136 WSMUX_MUX, 137 wsmux_mux_open, wsmux_mux_close, wsmux_do_ioctl, wsmux_do_displayioctl, 138 wsmux_evsrc_set_display 139 }; 140 141 /* From upper level */ 142 void 143 wsmuxattach(int n) 144 { 145 } 146 147 /* Keep track of all muxes that have been allocated */ 148 static int nwsmux = 0; 149 static struct wsmux_softc **wsmuxdevs; 150 151 /* Return mux n, create if necessary */ 152 struct wsmux_softc * 153 wsmux_getmux(int n) 154 { 155 struct wsmux_softc *sc; 156 int i; 157 void *new; 158 159 n = WSMUXDEV(n); /* limit range */ 160 161 /* Make sure there is room for mux n in the table */ 162 if (n >= nwsmux) { 163 i = nwsmux; 164 nwsmux = n + 1; 165 if (i != 0) 166 new = realloc(wsmuxdevs, nwsmux * sizeof (*wsmuxdevs), 167 M_DEVBUF, M_NOWAIT); 168 else 169 new = malloc(nwsmux * sizeof (*wsmuxdevs), 170 M_DEVBUF, M_NOWAIT); 171 if (new == NULL) { 172 printf("wsmux_getmux: no memory for mux %d\n", n); 173 return (NULL); 174 } 175 wsmuxdevs = new; 176 for (; i < nwsmux; i++) 177 wsmuxdevs[i] = NULL; 178 } 179 180 sc = wsmuxdevs[n]; 181 if (sc == NULL) { 182 sc = wsmux_create("wsmux", n); 183 if (sc == NULL) 184 printf("wsmux: attach out of memory\n"); 185 wsmuxdevs[n] = sc; 186 } 187 return (sc); 188 } 189 190 /* 191 * open() of the pseudo device from device table. 192 */ 193 int 194 wsmuxopen(dev_t dev, int flags, int mode, struct lwp *l) 195 { 196 struct wsmux_softc *sc; 197 struct wseventvar *evar; 198 int minr, unit; 199 200 minr = minor(dev); 201 unit = WSMUXDEV(minr); 202 sc = wsmux_getmux(unit); 203 if (sc == NULL) 204 return (ENXIO); 205 206 DPRINTF(("wsmuxopen: %s: sc=%p l=%p\n", sc->sc_base.me_dv.dv_xname, 207 sc, l)); 208 209 if (WSMUXCTL(minr)) { 210 /* This is the control device which does not allow reads. */ 211 if (flags & FREAD) 212 return (EINVAL); 213 return (0); 214 } 215 if ((flags & (FREAD | FWRITE)) == FWRITE) 216 /* Allow write only open */ 217 return (0); 218 219 if (sc->sc_base.me_parent != NULL) { 220 /* Grab the mux out of the greedy hands of the parent mux. */ 221 DPRINTF(("wsmuxopen: detach\n")); 222 wsmux_detach_sc(&sc->sc_base); 223 } 224 225 if (sc->sc_base.me_evp != NULL) 226 /* Already open. */ 227 return (EBUSY); 228 229 evar = &sc->sc_base.me_evar; 230 wsevent_init(evar, l->l_proc); 231 #ifdef WSDISPLAY_COMPAT_RAWKBD 232 sc->sc_rawkbd = 0; 233 #endif 234 235 wsmux_do_open(sc, evar); 236 237 return (0); 238 } 239 240 /* 241 * Open of a mux via the parent mux. 242 */ 243 int 244 wsmux_mux_open(struct wsevsrc *me, struct wseventvar *evar) 245 { 246 struct wsmux_softc *sc = (struct wsmux_softc *)me; 247 248 #ifdef DIAGNOSTIC 249 if (sc->sc_base.me_evp != NULL) { 250 printf("wsmux_mux_open: busy\n"); 251 return (EBUSY); 252 } 253 if (sc->sc_base.me_parent == NULL) { 254 printf("wsmux_mux_open: no parent\n"); 255 return (EINVAL); 256 } 257 #endif 258 259 wsmux_do_open(sc, evar); 260 261 return (0); 262 } 263 264 /* Common part of opening a mux. */ 265 void 266 wsmux_do_open(struct wsmux_softc *sc, struct wseventvar *evar) 267 { 268 struct wsevsrc *me; 269 270 sc->sc_base.me_evp = evar; /* remember event variable, mark as open */ 271 272 /* Open all children. */ 273 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 274 DPRINTF(("wsmuxopen: %s: m=%p dev=%s\n", 275 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname)); 276 #ifdef DIAGNOSTIC 277 if (me->me_evp != NULL) { 278 printf("wsmuxopen: dev already in use\n"); 279 continue; 280 } 281 if (me->me_parent != sc) { 282 printf("wsmux_do_open: bad child=%p\n", me); 283 continue; 284 } 285 { 286 int error = wsevsrc_open(me, evar); 287 if (error) { 288 DPRINTF(("wsmuxopen: open failed %d\n", error)); 289 } 290 } 291 #else 292 /* ignore errors, failing children will not be marked open */ 293 (void)wsevsrc_open(me, evar); 294 #endif 295 } 296 } 297 298 /* 299 * close() of the pseudo device from device table. 300 */ 301 int 302 wsmuxclose(dev_t dev, int flags, int mode, 303 struct lwp *l) 304 { 305 int minr = minor(dev); 306 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 307 struct wseventvar *evar = sc->sc_base.me_evp; 308 309 if (WSMUXCTL(minr)) 310 /* control device */ 311 return (0); 312 if (evar == NULL) 313 /* Not open for read */ 314 return (0); 315 316 wsmux_do_close(sc); 317 sc->sc_base.me_evp = NULL; 318 wsevent_fini(evar); 319 return (0); 320 } 321 322 /* 323 * Close of a mux via the parent mux. 324 */ 325 int 326 wsmux_mux_close(struct wsevsrc *me) 327 { 328 me->me_evp = NULL; 329 wsmux_do_close((struct wsmux_softc *)me); 330 return (0); 331 } 332 333 /* Common part of closing a mux. */ 334 void 335 wsmux_do_close(struct wsmux_softc *sc) 336 { 337 struct wsevsrc *me; 338 339 DPRINTF(("wsmuxclose: %s: sc=%p\n", sc->sc_base.me_dv.dv_xname, sc)); 340 341 /* Close all the children. */ 342 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 343 DPRINTF(("wsmuxclose %s: m=%p dev=%s\n", 344 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname)); 345 #ifdef DIAGNOSTIC 346 if (me->me_parent != sc) { 347 printf("wsmuxclose: bad child=%p\n", me); 348 continue; 349 } 350 #endif 351 (void)wsevsrc_close(me); 352 me->me_evp = NULL; 353 } 354 } 355 356 /* 357 * read() of the pseudo device from device table. 358 */ 359 int 360 wsmuxread(dev_t dev, struct uio *uio, int flags) 361 { 362 int minr = minor(dev); 363 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 364 struct wseventvar *evar; 365 int error; 366 367 if (WSMUXCTL(minr)) { 368 /* control device */ 369 return (EINVAL); 370 } 371 372 evar = sc->sc_base.me_evp; 373 if (evar == NULL) { 374 #ifdef DIAGNOSTIC 375 /* XXX can we get here? */ 376 printf("wsmuxread: not open\n"); 377 #endif 378 return (EINVAL); 379 } 380 381 DPRINTFN(5,("wsmuxread: %s event read evar=%p\n", 382 sc->sc_base.me_dv.dv_xname, evar)); 383 error = wsevent_read(evar, uio, flags); 384 DPRINTFN(5,("wsmuxread: %s event read ==> error=%d\n", 385 sc->sc_base.me_dv.dv_xname, error)); 386 return (error); 387 } 388 389 /* 390 * ioctl of the pseudo device from device table. 391 */ 392 int 393 wsmuxioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 394 { 395 int u = WSMUXDEV(minor(dev)); 396 397 return wsmux_do_ioctl(&wsmuxdevs[u]->sc_base.me_dv, cmd, data, flag, l); 398 } 399 400 /* 401 * ioctl of a mux via the parent mux, continuation of wsmuxioctl(). 402 */ 403 int 404 wsmux_do_ioctl(struct device *dv, u_long cmd, caddr_t data, int flag, 405 struct lwp *lwp) 406 { 407 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 408 struct wsevsrc *me; 409 int error, ok; 410 int s, n; 411 struct wseventvar *evar; 412 struct wscons_event event; 413 struct wsmux_device_list *l; 414 415 DPRINTF(("wsmux_do_ioctl: %s: enter sc=%p, cmd=%08lx\n", 416 sc->sc_base.me_dv.dv_xname, sc, cmd)); 417 418 switch (cmd) { 419 case WSMUXIO_INJECTEVENT: 420 /* Inject an event, e.g., from moused. */ 421 DPRINTF(("%s: inject\n", sc->sc_base.me_dv.dv_xname)); 422 423 evar = sc->sc_base.me_evp; 424 if (evar == NULL) { 425 /* No event sink, so ignore it. */ 426 DPRINTF(("wsmux_do_ioctl: event ignored\n")); 427 return (0); 428 } 429 430 s = spltty(); 431 event.type = ((struct wscons_event *)data)->type; 432 event.value = ((struct wscons_event *)data)->value; 433 error = wsevent_inject(evar, &event, 1); 434 splx(s); 435 436 return error; 437 case WSMUXIO_ADD_DEVICE: 438 #define d ((struct wsmux_device *)data) 439 DPRINTF(("%s: add type=%d, no=%d\n", sc->sc_base.me_dv.dv_xname, 440 d->type, d->idx)); 441 switch (d->type) { 442 #if NWSMOUSE > 0 443 case WSMUX_MOUSE: 444 return (wsmouse_add_mux(d->idx, sc)); 445 #endif 446 #if NWSKBD > 0 447 case WSMUX_KBD: 448 return (wskbd_add_mux(d->idx, sc)); 449 #endif 450 case WSMUX_MUX: 451 return (wsmux_add_mux(d->idx, sc)); 452 default: 453 return (EINVAL); 454 } 455 case WSMUXIO_REMOVE_DEVICE: 456 DPRINTF(("%s: rem type=%d, no=%d\n", sc->sc_base.me_dv.dv_xname, 457 d->type, d->idx)); 458 /* Locate the device */ 459 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 460 if (me->me_ops->type == d->type && 461 device_unit(&me->me_dv) == d->idx) { 462 DPRINTF(("wsmux_do_ioctl: detach\n")); 463 wsmux_detach_sc(me); 464 return (0); 465 } 466 } 467 return (EINVAL); 468 #undef d 469 470 case WSMUXIO_LIST_DEVICES: 471 DPRINTF(("%s: list\n", sc->sc_base.me_dv.dv_xname)); 472 l = (struct wsmux_device_list *)data; 473 n = 0; 474 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 475 if (n >= WSMUX_MAXDEV) 476 break; 477 l->devices[n].type = me->me_ops->type; 478 l->devices[n].idx = device_unit(&me->me_dv); 479 n++; 480 } 481 l->ndevices = n; 482 return (0); 483 #ifdef WSDISPLAY_COMPAT_RAWKBD 484 case WSKBDIO_SETMODE: 485 sc->sc_rawkbd = *(int *)data; 486 DPRINTF(("wsmux_do_ioctl: save rawkbd = %d\n", sc->sc_rawkbd)); 487 break; 488 #endif 489 case FIONBIO: 490 DPRINTF(("%s: FIONBIO\n", sc->sc_base.me_dv.dv_xname)); 491 return (0); 492 493 case FIOASYNC: 494 DPRINTF(("%s: FIOASYNC\n", sc->sc_base.me_dv.dv_xname)); 495 evar = sc->sc_base.me_evp; 496 if (evar == NULL) 497 return (EINVAL); 498 evar->async = *(int *)data != 0; 499 return (0); 500 case FIOSETOWN: 501 DPRINTF(("%s: FIOSETOWN\n", sc->sc_base.me_dv.dv_xname)); 502 evar = sc->sc_base.me_evp; 503 if (evar == NULL) 504 return (EINVAL); 505 if (-*(int *)data != evar->io->p_pgid 506 && *(int *)data != evar->io->p_pid) 507 return (EPERM); 508 return (0); 509 case TIOCSPGRP: 510 DPRINTF(("%s: TIOCSPGRP\n", sc->sc_base.me_dv.dv_xname)); 511 evar = sc->sc_base.me_evp; 512 if (evar == NULL) 513 return (EINVAL); 514 if (*(int *)data != evar->io->p_pgid) 515 return (EPERM); 516 return (0); 517 default: 518 DPRINTF(("%s: unknown\n", sc->sc_base.me_dv.dv_xname)); 519 break; 520 } 521 522 if (sc->sc_base.me_evp == NULL 523 #if NWSDISPLAY > 0 524 && sc->sc_base.me_dispdv == NULL 525 #endif 526 ) 527 return (EACCES); 528 529 /* Return 0 if any of the ioctl() succeeds, otherwise the last error */ 530 error = 0; 531 ok = 0; 532 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 533 #ifdef DIAGNOSTIC 534 /* XXX check evp? */ 535 if (me->me_parent != sc) { 536 printf("wsmux_do_ioctl: bad child %p\n", me); 537 continue; 538 } 539 #endif 540 error = wsevsrc_ioctl(me, cmd, data, flag, lwp); 541 DPRINTF(("wsmux_do_ioctl: %s: me=%p dev=%s ==> %d\n", 542 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname, 543 error)); 544 if (!error) 545 ok = 1; 546 } 547 if (ok) { 548 error = 0; 549 if (cmd == WSKBDIO_SETENCODING) { 550 sc->sc_kbd_layout = *((kbd_t *)data); 551 } 552 553 } 554 555 return (error); 556 } 557 558 /* 559 * poll() of the pseudo device from device table. 560 */ 561 int 562 wsmuxpoll(dev_t dev, int events, struct lwp *l) 563 { 564 int minr = minor(dev); 565 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 566 567 if (WSMUXCTL(minr)) { 568 /* control device */ 569 return (0); 570 } 571 572 if (sc->sc_base.me_evp == NULL) { 573 #ifdef DIAGNOSTIC 574 printf("wsmuxpoll: not open\n"); 575 #endif 576 return (POLLHUP); 577 } 578 579 return (wsevent_poll(sc->sc_base.me_evp, events, l)); 580 } 581 582 /* 583 * kqfilter() of the pseudo device from device table. 584 */ 585 int 586 wsmuxkqfilter(dev_t dev, struct knote *kn) 587 { 588 int minr = minor(dev); 589 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 590 591 if (WSMUXCTL(minr)) { 592 /* control device */ 593 return (1); 594 } 595 596 if (sc->sc_base.me_evp == NULL) { 597 #ifdef DIAGNOSTIC 598 printf("wsmuxkqfilter: not open\n"); 599 #endif 600 return (1); 601 } 602 603 return (wsevent_kqfilter(sc->sc_base.me_evp, kn)); 604 } 605 606 /* 607 * Add mux unit as a child to muxsc. 608 */ 609 int 610 wsmux_add_mux(int unit, struct wsmux_softc *muxsc) 611 { 612 struct wsmux_softc *sc, *m; 613 614 sc = wsmux_getmux(unit); 615 if (sc == NULL) 616 return (ENXIO); 617 618 DPRINTF(("wsmux_add_mux: %s(%p) to %s(%p)\n", 619 sc->sc_base.me_dv.dv_xname, sc, muxsc->sc_base.me_dv.dv_xname, 620 muxsc)); 621 622 if (sc->sc_base.me_parent != NULL || sc->sc_base.me_evp != NULL) 623 return (EBUSY); 624 625 /* The mux we are adding must not be an ancestor of itself. */ 626 for (m = muxsc; m != NULL ; m = m->sc_base.me_parent) 627 if (m == sc) 628 return (EINVAL); 629 630 return (wsmux_attach_sc(muxsc, &sc->sc_base)); 631 } 632 633 /* Create a new mux softc. */ 634 struct wsmux_softc * 635 wsmux_create(const char *name, int unit) 636 { 637 struct wsmux_softc *sc; 638 639 /* XXX This is wrong -- should use autoconfiguraiton framework */ 640 641 DPRINTF(("wsmux_create: allocating\n")); 642 sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT|M_ZERO); 643 if (sc == NULL) 644 return (NULL); 645 CIRCLEQ_INIT(&sc->sc_cld); 646 snprintf(sc->sc_base.me_dv.dv_xname, sizeof sc->sc_base.me_dv.dv_xname, 647 "%s%d", name, unit); 648 sc->sc_base.me_dv.dv_unit = unit; 649 sc->sc_base.me_ops = &wsmux_srcops; 650 sc->sc_kbd_layout = KB_NONE; 651 return (sc); 652 } 653 654 /* Attach me as a child to sc. */ 655 int 656 wsmux_attach_sc(struct wsmux_softc *sc, struct wsevsrc *me) 657 { 658 int error; 659 660 if (sc == NULL) 661 return (EINVAL); 662 663 DPRINTF(("wsmux_attach_sc: %s(%p): type=%d\n", 664 sc->sc_base.me_dv.dv_xname, sc, me->me_ops->type)); 665 666 #ifdef DIAGNOSTIC 667 if (me->me_parent != NULL) { 668 printf("wsmux_attach_sc: busy\n"); 669 return (EBUSY); 670 } 671 #endif 672 me->me_parent = sc; 673 CIRCLEQ_INSERT_TAIL(&sc->sc_cld, me, me_next); 674 675 error = 0; 676 #if NWSDISPLAY > 0 677 if (sc->sc_base.me_dispdv != NULL) { 678 /* This is a display mux, so attach the new device to it. */ 679 DPRINTF(("wsmux_attach_sc: %s: set display %p\n", 680 sc->sc_base.me_dv.dv_xname, sc->sc_base.me_dispdv)); 681 if (me->me_ops->dsetdisplay != NULL) { 682 error = wsevsrc_set_display(me, &sc->sc_base); 683 /* Ignore that the console already has a display. */ 684 if (error == EBUSY) 685 error = 0; 686 if (!error) { 687 #ifdef WSDISPLAY_COMPAT_RAWKBD 688 DPRINTF(("wsmux_attach_sc: %s set rawkbd=%d\n", 689 me->me_dv.dv_xname, sc->sc_rawkbd)); 690 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 691 &sc->sc_rawkbd, 0, 0); 692 #endif 693 if (sc->sc_kbd_layout != KB_NONE) 694 (void)wsevsrc_ioctl(me, 695 WSKBDIO_SETENCODING, 696 &sc->sc_kbd_layout, FWRITE, 0); 697 } 698 } 699 } 700 #endif 701 if (sc->sc_base.me_evp != NULL) { 702 /* Mux is open, so open the new subdevice */ 703 DPRINTF(("wsmux_attach_sc: %s: calling open of %s\n", 704 sc->sc_base.me_dv.dv_xname, me->me_dv.dv_xname)); 705 error = wsevsrc_open(me, sc->sc_base.me_evp); 706 } else { 707 DPRINTF(("wsmux_attach_sc: %s not open\n", 708 sc->sc_base.me_dv.dv_xname)); 709 } 710 711 if (error) { 712 me->me_parent = NULL; 713 CIRCLEQ_REMOVE(&sc->sc_cld, me, me_next); 714 } 715 716 DPRINTF(("wsmux_attach_sc: %s(%p) done, error=%d\n", 717 sc->sc_base.me_dv.dv_xname, sc, error)); 718 return (error); 719 } 720 721 /* Remove me from the parent. */ 722 void 723 wsmux_detach_sc(struct wsevsrc *me) 724 { 725 struct wsmux_softc *sc = me->me_parent; 726 727 DPRINTF(("wsmux_detach_sc: %s(%p) parent=%p\n", 728 me->me_dv.dv_xname, me, sc)); 729 730 #ifdef DIAGNOSTIC 731 if (sc == NULL) { 732 printf("wsmux_detach_sc: %s has no parent\n", 733 me->me_dv.dv_xname); 734 return; 735 } 736 #endif 737 738 #if NWSDISPLAY > 0 739 if (sc->sc_base.me_dispdv != NULL) { 740 if (me->me_ops->dsetdisplay != NULL) 741 /* ignore error, there's nothing we can do */ 742 (void)wsevsrc_set_display(me, NULL); 743 } else 744 #endif 745 if (me->me_evp != NULL) { 746 DPRINTF(("wsmux_detach_sc: close\n")); 747 /* mux device is open, so close multiplexee */ 748 (void)wsevsrc_close(me); 749 } 750 751 CIRCLEQ_REMOVE(&sc->sc_cld, me, me_next); 752 me->me_parent = NULL; 753 754 DPRINTF(("wsmux_detach_sc: done sc=%p\n", sc)); 755 } 756 757 /* 758 * Display ioctl() of a mux via the parent mux. 759 */ 760 int 761 wsmux_do_displayioctl(struct device *dv, u_long cmd, caddr_t data, int flag, 762 struct lwp *l) 763 { 764 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 765 struct wsevsrc *me; 766 int error, ok; 767 768 DPRINTF(("wsmux_displayioctl: %s: sc=%p, cmd=%08lx\n", 769 sc->sc_base.me_dv.dv_xname, sc, cmd)); 770 771 #ifdef WSDISPLAY_COMPAT_RAWKBD 772 if (cmd == WSKBDIO_SETMODE) { 773 sc->sc_rawkbd = *(int *)data; 774 DPRINTF(("wsmux_displayioctl: rawkbd = %d\n", sc->sc_rawkbd)); 775 } 776 #endif 777 778 /* 779 * Return 0 if any of the ioctl() succeeds, otherwise the last error. 780 * Return EPASSTHROUGH if no mux component accepts the ioctl. 781 */ 782 error = EPASSTHROUGH; 783 ok = 0; 784 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 785 DPRINTF(("wsmux_displayioctl: me=%p\n", me)); 786 #ifdef DIAGNOSTIC 787 if (me->me_parent != sc) { 788 printf("wsmux_displayioctl: bad child %p\n", me); 789 continue; 790 } 791 #endif 792 if (me->me_ops->ddispioctl != NULL) { 793 error = wsevsrc_display_ioctl(me, cmd, data, flag, l); 794 DPRINTF(("wsmux_displayioctl: me=%p dev=%s ==> %d\n", 795 me, me->me_dv.dv_xname, error)); 796 if (!error) 797 ok = 1; 798 } 799 } 800 if (ok) 801 error = 0; 802 803 return (error); 804 } 805 806 #if NWSDISPLAY > 0 807 /* 808 * Set display of a mux via the parent mux. 809 */ 810 int 811 wsmux_evsrc_set_display(struct device *dv, struct wsevsrc *ame) 812 { 813 struct wsmux_softc *muxsc = (struct wsmux_softc *)ame; 814 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 815 struct device *displaydv = muxsc ? muxsc->sc_base.me_dispdv : NULL; 816 817 DPRINTF(("wsmux_set_display: %s: displaydv=%p\n", 818 sc->sc_base.me_dv.dv_xname, displaydv)); 819 820 if (displaydv != NULL) { 821 if (sc->sc_base.me_dispdv != NULL) 822 return (EBUSY); 823 } else { 824 if (sc->sc_base.me_dispdv == NULL) 825 return (ENXIO); 826 } 827 828 return wsmux_set_display(sc, displaydv); 829 } 830 831 int 832 wsmux_set_display(struct wsmux_softc *sc, struct device *displaydv) 833 { 834 struct device *odisplaydv; 835 struct wsevsrc *me; 836 struct wsmux_softc *nsc = displaydv ? sc : NULL; 837 int error, ok; 838 839 odisplaydv = sc->sc_base.me_dispdv; 840 sc->sc_base.me_dispdv = displaydv; 841 842 if (displaydv) 843 printf("%s: connecting to %s\n", 844 sc->sc_base.me_dv.dv_xname, displaydv->dv_xname); 845 ok = 0; 846 error = 0; 847 CIRCLEQ_FOREACH(me, &sc->sc_cld,me_next) { 848 #ifdef DIAGNOSTIC 849 if (me->me_parent != sc) { 850 printf("wsmux_set_display: bad child parent %p\n", me); 851 continue; 852 } 853 #endif 854 if (me->me_ops->dsetdisplay != NULL) { 855 error = wsevsrc_set_display(me, &nsc->sc_base); 856 DPRINTF(("wsmux_set_display: m=%p dev=%s error=%d\n", 857 me, me->me_dv.dv_xname, error)); 858 if (!error) { 859 ok = 1; 860 #ifdef WSDISPLAY_COMPAT_RAWKBD 861 DPRINTF(("wsmux_set_display: %s set rawkbd=%d\n", 862 me->me_dv.dv_xname, sc->sc_rawkbd)); 863 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 864 &sc->sc_rawkbd, 0, 0); 865 #endif 866 } 867 } 868 } 869 if (ok) 870 error = 0; 871 872 if (displaydv == NULL) 873 printf("%s: disconnecting from %s\n", 874 sc->sc_base.me_dv.dv_xname, odisplaydv->dv_xname); 875 876 return (error); 877 } 878 #endif /* NWSDISPLAY > 0 */ 879
Indexes created Wed Sep 24 05:09:52 GMT 2025