wsmux.c revision 1.24
1 /* $NetBSD: wsmux.c,v 1.24 2001/11/13 06:17:47 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Author: Lennart Augustsson <augustss (at) 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 1.24 2001/11/13 06:17:47 lukem 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_set_display(struct device *, struct wsevsrc *); 106 #else 107 #define wsmux_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 cdev_decl(wsmux); 122 123 struct wssrcops wsmux_srcops = { 124 WSMUX_MUX, 125 wsmux_mux_open, wsmux_mux_close, wsmux_do_ioctl, wsmux_do_displayioctl, 126 wsmux_set_display 127 }; 128 129 /* From upper level */ 130 void 131 wsmuxattach(int n) 132 { 133 } 134 135 /* Keep track of all muxes that have been allocated */ 136 static int nwsmux = 0; 137 static struct wsmux_softc **wsmuxdevs; 138 139 /* Return mux n, create if necessary */ 140 struct wsmux_softc * 141 wsmux_getmux(int n) 142 { 143 struct wsmux_softc *sc; 144 int i; 145 void *new; 146 147 n = WSMUXDEV(n); /* limit range */ 148 149 /* Make sure there is room for mux n in the table */ 150 if (n >= nwsmux) { 151 i = nwsmux; 152 nwsmux = n + 1; 153 if (i != 0) 154 new = realloc(wsmuxdevs, nwsmux * sizeof (*wsmuxdevs), 155 M_DEVBUF, M_NOWAIT); 156 else 157 new = malloc(nwsmux * sizeof (*wsmuxdevs), 158 M_DEVBUF, M_NOWAIT); 159 if (new == NULL) { 160 printf("wsmux_getmux: no memory for mux %d\n", n); 161 return (NULL); 162 } 163 wsmuxdevs = new; 164 for (; i < nwsmux; i++) 165 wsmuxdevs[i] = NULL; 166 } 167 168 sc = wsmuxdevs[n]; 169 if (sc == NULL) { 170 sc = wsmux_create("wsmux", n); 171 if (sc == NULL) 172 printf("wsmux: attach out of memory\n"); 173 wsmuxdevs[n] = sc; 174 } 175 return (sc); 176 } 177 178 /* 179 * open() of the pseudo device from device table. 180 */ 181 int 182 wsmuxopen(dev_t dev, int flags, int mode, struct proc *p) 183 { 184 struct wsmux_softc *sc; 185 struct wseventvar *evar; 186 int minr, unit; 187 188 minr = minor(dev); 189 unit = WSMUXDEV(minr); 190 sc = wsmux_getmux(unit); 191 if (sc == NULL) 192 return (ENXIO); 193 194 DPRINTF(("wsmuxopen: %s: sc=%p p=%p\n", sc->sc_base.me_dv.dv_xname, 195 sc, p)); 196 197 if (WSMUXCTL(minr)) { 198 /* This is the control device which does not allow reads. */ 199 if (flags & FREAD) 200 return (EINVAL); 201 return (0); 202 } 203 if ((flags & (FREAD | FWRITE)) == FWRITE) 204 /* Allow write only open */ 205 return (0); 206 207 if (sc->sc_base.me_parent != NULL) { 208 /* Grab the mux out of the greedy hands of the parent mux. */ 209 DPRINTF(("wsmuxopen: detach\n")); 210 wsmux_detach_sc(&sc->sc_base); 211 } 212 213 if (sc->sc_base.me_evp != NULL) 214 /* Already open. */ 215 return (EBUSY); 216 217 evar = &sc->sc_base.me_evar; 218 wsevent_init(evar); 219 evar->io = p; 220 #ifdef WSDISPLAY_COMPAT_RAWKBD 221 sc->sc_rawkbd = 0; 222 #endif 223 224 wsmux_do_open(sc, evar); 225 226 return (0); 227 } 228 229 /* 230 * Open of a mux via the parent mux. 231 */ 232 int 233 wsmux_mux_open(struct wsevsrc *me, struct wseventvar *evar) 234 { 235 struct wsmux_softc *sc = (struct wsmux_softc *)me; 236 237 #ifdef DIAGNOSTIC 238 if (sc->sc_base.me_evp != NULL) { 239 printf("wsmux_mux_open: busy\n"); 240 return (EBUSY); 241 } 242 if (sc->sc_base.me_parent == NULL) { 243 printf("wsmux_mux_open: no parent\n"); 244 return (EINVAL); 245 } 246 #endif 247 248 wsmux_do_open(sc, evar); 249 250 return (0); 251 } 252 253 /* Common part of opening a mux. */ 254 void 255 wsmux_do_open(struct wsmux_softc *sc, struct wseventvar *evar) 256 { 257 struct wsevsrc *me; 258 259 sc->sc_base.me_evp = evar; /* remember event variable, mark as open */ 260 261 /* Open all children. */ 262 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 263 DPRINTF(("wsmuxopen: %s: m=%p dev=%s\n", 264 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname)); 265 #ifdef DIAGNOSTIC 266 if (me->me_evp != NULL) { 267 printf("wsmuxopen: dev already in use\n"); 268 continue; 269 } 270 if (me->me_parent != sc) { 271 printf("wsmux_do_open: bad child=%p\n", me); 272 continue; 273 } 274 { 275 int error = wsevsrc_open(me, evar); 276 if (error) { 277 DPRINTF(("wsmuxopen: open failed %d\n", error)); 278 } 279 } 280 #else 281 /* ignore errors, failing children will not be marked open */ 282 (void)wsevsrc_open(me, evar); 283 #endif 284 } 285 } 286 287 /* 288 * close() of the pseudo device from device table. 289 */ 290 int 291 wsmuxclose(dev_t dev, int flags, int mode, struct proc *p) 292 { 293 int minr = minor(dev); 294 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 295 struct wseventvar *evar = sc->sc_base.me_evp; 296 297 if (WSMUXCTL(minr)) 298 /* control device */ 299 return (0); 300 if (evar == NULL) 301 /* Not open for read */ 302 return (0); 303 304 sc->sc_base.me_evp = NULL; 305 wsevent_fini(evar); 306 wsmux_do_close(sc); 307 return (0); 308 } 309 310 /* 311 * Close of a mux via the parent mux. 312 */ 313 int 314 wsmux_mux_close(struct wsevsrc *me) 315 { 316 me->me_evp = NULL; 317 wsmux_do_close((struct wsmux_softc *)me); 318 return (0); 319 } 320 321 /* Common part of closing a mux. */ 322 void 323 wsmux_do_close(struct wsmux_softc *sc) 324 { 325 struct wsevsrc *me; 326 327 DPRINTF(("wsmuxclose: %s: sc=%p\n", sc->sc_base.me_dv.dv_xname, sc)); 328 329 /* Close all the children. */ 330 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 331 DPRINTF(("wsmuxclose %s: m=%p dev=%s\n", 332 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname)); 333 #ifdef DIAGNOSTIC 334 if (me->me_parent != sc) { 335 printf("wsmuxclose: bad child=%p\n", me); 336 continue; 337 } 338 #endif 339 (void)wsevsrc_close(me); 340 me->me_evp = NULL; 341 } 342 } 343 344 /* 345 * read() of the pseudo device from device table. 346 */ 347 int 348 wsmuxread(dev_t dev, struct uio *uio, int flags) 349 { 350 int minr = minor(dev); 351 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 352 struct wseventvar *evar; 353 int error; 354 355 if (WSMUXCTL(minr)) { 356 /* control device */ 357 return (EINVAL); 358 } 359 360 evar = sc->sc_base.me_evp; 361 if (evar == NULL) { 362 #ifdef DIAGNOSTIC 363 /* XXX can we get here? */ 364 printf("wsmuxread: not open\n"); 365 #endif 366 return (EINVAL); 367 } 368 369 DPRINTFN(5,("wsmuxread: %s event read evar=%p\n", 370 sc->sc_base.me_dv.dv_xname, evar)); 371 error = wsevent_read(evar, uio, flags); 372 DPRINTFN(5,("wsmuxread: %s event read ==> error=%d\n", 373 sc->sc_base.me_dv.dv_xname, error)); 374 return (error); 375 } 376 377 /* 378 * ioctl of the pseudo device from device table. 379 */ 380 int 381 wsmuxioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 382 { 383 int u = WSMUXDEV(minor(dev)); 384 385 return wsmux_do_ioctl(&wsmuxdevs[u]->sc_base.me_dv, cmd, data, flag, p); 386 } 387 388 /* 389 * ioctl of a mux via the parent mux, continuation of wsmuxioctl(). 390 */ 391 int 392 wsmux_do_ioctl(struct device *dv, u_long cmd, caddr_t data, int flag, 393 struct proc *p) 394 { 395 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 396 struct wsevsrc *me; 397 int error, ok; 398 int s, put, get, n; 399 struct wseventvar *evar; 400 struct wscons_event *ev; 401 struct timeval thistime; 402 struct wsmux_device_list *l; 403 404 DPRINTF(("wsmux_do_ioctl: %s: enter sc=%p, cmd=%08lx\n", 405 sc->sc_base.me_dv.dv_xname, sc, cmd)); 406 407 switch (cmd) { 408 case WSMUXIO_INJECTEVENT: 409 /* Inject an event, e.g., from moused. */ 410 DPRINTF(("%s: inject\n", sc->sc_base.me_dv.dv_xname)); 411 412 evar = sc->sc_base.me_evp; 413 if (evar == NULL) /* XXX is this an error? */ 414 return (EACCES); 415 416 s = spltty(); 417 get = evar->get; 418 put = evar->put; 419 ev = &evar->q[put]; 420 if (++put % WSEVENT_QSIZE == get) { 421 put--; 422 splx(s); 423 return (ENOSPC); 424 } 425 if (put >= WSEVENT_QSIZE) 426 put = 0; 427 *ev = *(struct wscons_event *)data; 428 microtime(&thistime); 429 TIMEVAL_TO_TIMESPEC(&thistime, &ev->time); 430 evar->put = put; 431 WSEVENT_WAKEUP(evar); 432 splx(s); 433 return (0); 434 case WSMUXIO_ADD_DEVICE: 435 #define d ((struct wsmux_device *)data) 436 DPRINTF(("%s: add type=%d, no=%d\n", sc->sc_base.me_dv.dv_xname, 437 d->type, d->idx)); 438 switch (d->type) { 439 #if NWSMOUSE > 0 440 case WSMUX_MOUSE: 441 return (wsmouse_add_mux(d->idx, sc)); 442 #endif 443 #if NWSKBD > 0 444 case WSMUX_KBD: 445 return (wskbd_add_mux(d->idx, sc)); 446 #endif 447 case WSMUX_MUX: 448 return (wsmux_add_mux(d->idx, sc)); 449 default: 450 return (EINVAL); 451 } 452 case WSMUXIO_REMOVE_DEVICE: 453 DPRINTF(("%s: rem type=%d, no=%d\n", sc->sc_base.me_dv.dv_xname, 454 d->type, d->idx)); 455 /* Locate the device */ 456 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 457 if (me->me_ops->type == d->type && 458 me->me_dv.dv_unit == d->idx) { 459 DPRINTF(("wsmux_do_ioctl: detach\n")); 460 wsmux_detach_sc(me); 461 return (0); 462 } 463 } 464 return (EINVAL); 465 #undef d 466 467 case WSMUXIO_LIST_DEVICES: 468 DPRINTF(("%s: list\n", sc->sc_base.me_dv.dv_xname)); 469 l = (struct wsmux_device_list *)data; 470 n = 0; 471 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 472 if (n >= WSMUX_MAXDEV) 473 break; 474 l->devices[n].type = me->me_ops->type; 475 l->devices[n].idx = me->me_dv.dv_unit; 476 n++; 477 } 478 l->ndevices = n; 479 return (0); 480 #ifdef WSDISPLAY_COMPAT_RAWKBD 481 case WSKBDIO_SETMODE: 482 sc->sc_rawkbd = *(int *)data; 483 DPRINTF(("wsmux_do_ioctl: save rawkbd = %d\n", sc->sc_rawkbd)); 484 break; 485 #endif 486 case FIONBIO: 487 DPRINTF(("%s: FIONBIO\n", sc->sc_base.me_dv.dv_xname)); 488 return (0); 489 490 case FIOASYNC: 491 DPRINTF(("%s: FIOASYNC\n", sc->sc_base.me_dv.dv_xname)); 492 evar = sc->sc_base.me_evp; 493 if (evar == NULL) 494 return (EINVAL); 495 evar->async = *(int *)data != 0; 496 return (0); 497 case TIOCSPGRP: 498 DPRINTF(("%s: TIOCSPGRP\n", sc->sc_base.me_dv.dv_xname)); 499 evar = sc->sc_base.me_evp; 500 if (evar == NULL) 501 return (EINVAL); 502 if (*(int *)data != evar->io->p_pgid) 503 return (EPERM); 504 return (0); 505 default: 506 DPRINTF(("%s: unknown\n", sc->sc_base.me_dv.dv_xname)); 507 break; 508 } 509 510 if (sc->sc_base.me_evp == NULL 511 #if NWSDISPLAY > 0 512 && sc->sc_base.me_dispdv == NULL 513 #endif 514 ) 515 return (EACCES); 516 517 /* Return 0 if any of the ioctl() succeeds, otherwise the last error */ 518 error = 0; 519 ok = 0; 520 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 521 #ifdef DIAGNOSTIC 522 /* XXX check evp? */ 523 if (me->me_parent != sc) { 524 printf("wsmux_do_ioctl: bad child %p\n", me); 525 continue; 526 } 527 #endif 528 error = wsevsrc_ioctl(me, cmd, data, flag, p); 529 DPRINTF(("wsmux_do_ioctl: %s: me=%p dev=%s ==> %d\n", 530 sc->sc_base.me_dv.dv_xname, me, me->me_dv.dv_xname, 531 error)); 532 if (!error) 533 ok = 1; 534 } 535 if (ok) 536 error = 0; 537 538 return (error); 539 } 540 541 /* 542 * poll() of the pseudo device from device table. 543 */ 544 int 545 wsmuxpoll(dev_t dev, int events, struct proc *p) 546 { 547 int minr = minor(dev); 548 struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; 549 550 if (WSMUXCTL(minr)) { 551 /* control device */ 552 return (EINVAL); 553 } 554 555 if (sc->sc_base.me_evp == NULL) { 556 #ifdef DIAGNOSTIC 557 printf("wsmuxpoll: not open\n"); 558 #endif 559 return (EACCES); 560 } 561 562 return (wsevent_poll(sc->sc_base.me_evp, events, p)); 563 } 564 565 /* 566 * Add mux unit as a child to muxsc. 567 */ 568 int 569 wsmux_add_mux(int unit, struct wsmux_softc *muxsc) 570 { 571 struct wsmux_softc *sc, *m; 572 573 sc = wsmux_getmux(unit); 574 if (sc == NULL) 575 return (ENXIO); 576 577 DPRINTF(("wsmux_add_mux: %s(%p) to %s(%p)\n", 578 sc->sc_base.me_dv.dv_xname, sc, muxsc->sc_base.me_dv.dv_xname, 579 muxsc)); 580 581 if (sc->sc_base.me_parent != NULL || sc->sc_base.me_evp != NULL) 582 return (EBUSY); 583 584 /* The mux we are adding must not be an ancestor of itself. */ 585 for (m = muxsc; m != NULL ; m = m->sc_base.me_parent) 586 if (m == sc) 587 return (EINVAL); 588 589 return (wsmux_attach_sc(muxsc, &sc->sc_base)); 590 } 591 592 /* Create a new mux softc. */ 593 struct wsmux_softc * 594 wsmux_create(const char *name, int unit) 595 { 596 struct wsmux_softc *sc; 597 598 DPRINTF(("wsmux_create: allocating\n")); 599 sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT); 600 if (sc == NULL) 601 return (NULL); 602 memset(sc, 0, sizeof *sc); 603 CIRCLEQ_INIT(&sc->sc_cld); 604 snprintf(sc->sc_base.me_dv.dv_xname, sizeof sc->sc_base.me_dv.dv_xname, 605 "%s%d", name, unit); 606 sc->sc_base.me_dv.dv_unit = unit; 607 sc->sc_base.me_ops = &wsmux_srcops; 608 return (sc); 609 } 610 611 /* Attach me as a child to sc. */ 612 int 613 wsmux_attach_sc(struct wsmux_softc *sc, struct wsevsrc *me) 614 { 615 int error; 616 617 if (sc == NULL) 618 return (EINVAL); 619 620 DPRINTF(("wsmux_attach_sc: %s(%p): type=%d\n", 621 sc->sc_base.me_dv.dv_xname, sc, me->me_ops->type)); 622 623 #ifdef DIAGNOSTIC 624 if (me->me_parent != NULL) { 625 printf("wsmux_attach_sc: busy\n"); 626 return (EBUSY); 627 } 628 #endif 629 me->me_parent = sc; 630 CIRCLEQ_INSERT_TAIL(&sc->sc_cld, me, me_next); 631 632 error = 0; 633 #if NWSDISPLAY > 0 634 if (sc->sc_base.me_dispdv != NULL) { 635 /* This is a display mux, so attach the new device to it. */ 636 DPRINTF(("wsmux_attach_sc: %s: set display %p\n", 637 sc->sc_base.me_dv.dv_xname, sc->sc_base.me_dispdv)); 638 if (me->me_ops->dsetdisplay != NULL) { 639 error = wsevsrc_set_display(me, &sc->sc_base); 640 /* Ignore that the console already has a display. */ 641 if (error == EBUSY) 642 error = 0; 643 if (!error) { 644 #ifdef WSDISPLAY_COMPAT_RAWKBD 645 DPRINTF(("wsmux_attach_sc: %s set rawkbd=%d\n", 646 me->me_dv.dv_xname, sc->sc_rawkbd)); 647 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 648 &sc->sc_rawkbd, 0, 0); 649 #endif 650 } 651 } 652 } 653 #endif 654 if (sc->sc_base.me_evp != NULL) { 655 /* Mux is open, so open the new subdevice */ 656 DPRINTF(("wsmux_attach_sc: %s: calling open of %s\n", 657 sc->sc_base.me_dv.dv_xname, me->me_dv.dv_xname)); 658 error = wsevsrc_open(me, sc->sc_base.me_evp); 659 } else { 660 DPRINTF(("wsmux_attach_sc: %s not open\n", 661 sc->sc_base.me_dv.dv_xname)); 662 } 663 664 if (error) { 665 me->me_parent = NULL; 666 CIRCLEQ_REMOVE(&sc->sc_cld, me, me_next); 667 } 668 669 DPRINTF(("wsmux_attach_sc: %s(%p) done, error=%d\n", 670 sc->sc_base.me_dv.dv_xname, sc, error)); 671 return (error); 672 } 673 674 /* Remove me from the parent. */ 675 void 676 wsmux_detach_sc(struct wsevsrc *me) 677 { 678 struct wsmux_softc *sc = me->me_parent; 679 680 DPRINTF(("wsmux_detach_sc: %s(%p) parent=%p\n", 681 me->me_dv.dv_xname, me, sc)); 682 683 #ifdef DIAGNOSTIC 684 if (sc == NULL) { 685 printf("wsmux_detach_sc: %s has no parent\n", 686 me->me_dv.dv_xname); 687 return; 688 } 689 #endif 690 691 #if NWSDISPLAY > 0 692 if (sc->sc_base.me_dispdv != NULL) { 693 if (me->me_ops->dsetdisplay != NULL) 694 /* ignore error, there's nothing we can do */ 695 (void)wsevsrc_set_display(me, NULL); 696 } else 697 #endif 698 if (me->me_evp != NULL) { 699 DPRINTF(("wsmux_detach_sc: close\n")); 700 /* mux device is open, so close multiplexee */ 701 (void)wsevsrc_close(me); 702 } 703 704 CIRCLEQ_REMOVE(&sc->sc_cld, me, me_next); 705 me->me_parent = NULL; 706 707 DPRINTF(("wsmux_detach_sc: done sc=%p\n", sc)); 708 } 709 710 /* 711 * Display ioctl() of a mux via the parent mux. 712 */ 713 int 714 wsmux_do_displayioctl(struct device *dv, u_long cmd, caddr_t data, int flag, 715 struct proc *p) 716 { 717 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 718 struct wsevsrc *me; 719 int error, ok; 720 721 DPRINTF(("wsmux_displayioctl: %s: sc=%p, cmd=%08lx\n", 722 sc->sc_base.me_dv.dv_xname, sc, cmd)); 723 724 #ifdef WSDISPLAY_COMPAT_RAWKBD 725 if (cmd == WSKBDIO_SETMODE) { 726 sc->sc_rawkbd = *(int *)data; 727 DPRINTF(("wsmux_displayioctl: rawkbd = %d\n", sc->sc_rawkbd)); 728 } 729 #endif 730 731 /* 732 * Return 0 if any of the ioctl() succeeds, otherwise the last error. 733 * Return -1 if no mux component accepts the ioctl. 734 */ 735 error = -1; 736 ok = 0; 737 CIRCLEQ_FOREACH(me, &sc->sc_cld, me_next) { 738 DPRINTF(("wsmux_displayioctl: me=%p\n", me)); 739 #ifdef DIAGNOSTIC 740 if (me->me_parent != sc) { 741 printf("wsmux_displayioctl: bad child %p\n", me); 742 continue; 743 } 744 #endif 745 if (me->me_ops->ddispioctl != NULL) { 746 error = wsevsrc_display_ioctl(me, cmd, data, flag, p); 747 DPRINTF(("wsmux_displayioctl: me=%p dev=%s ==> %d\n", 748 me, me->me_dv.dv_xname, error)); 749 if (!error) 750 ok = 1; 751 } 752 } 753 if (ok) 754 error = 0; 755 756 return (error); 757 } 758 759 #if NWSDISPLAY > 0 760 /* 761 * Set display of a mux via the parent mux. 762 */ 763 int 764 wsmux_set_display(struct device *dv, struct wsevsrc *ame) 765 { 766 struct wsmux_softc *muxsc = (struct wsmux_softc *)ame; 767 struct wsmux_softc *sc = (struct wsmux_softc *)dv; 768 struct wsmux_softc *nsc = muxsc ? sc : NULL; 769 struct device *displaydv = muxsc ? muxsc->sc_base.me_dispdv : NULL; 770 struct device *odisplaydv; 771 struct wsevsrc *me; 772 int error, ok; 773 774 DPRINTF(("wsmux_set_display: %s: displaydv=%p\n", 775 sc->sc_base.me_dv.dv_xname, displaydv)); 776 777 if (displaydv != NULL) { 778 if (sc->sc_base.me_dispdv != NULL) 779 return (EBUSY); 780 } else { 781 if (sc->sc_base.me_dispdv == NULL) 782 return (ENXIO); 783 } 784 785 odisplaydv = sc->sc_base.me_dispdv; 786 sc->sc_base.me_dispdv = displaydv; 787 788 if (displaydv) 789 printf("%s: connecting to %s\n", 790 sc->sc_base.me_dv.dv_xname, displaydv->dv_xname); 791 ok = 0; 792 error = 0; 793 CIRCLEQ_FOREACH(me, &sc->sc_cld,me_next) { 794 #ifdef DIAGNOSTIC 795 if (me->me_parent != sc) { 796 printf("wsmux_set_display: bad child parent %p\n", me); 797 continue; 798 } 799 #endif 800 if (me->me_ops->dsetdisplay != NULL) { 801 error = wsevsrc_set_display(me, &nsc->sc_base); 802 DPRINTF(("wsmux_set_display: m=%p dev=%s error=%d\n", 803 me, me->me_dv.dv_xname, error)); 804 if (!error) { 805 ok = 1; 806 #ifdef WSDISPLAY_COMPAT_RAWKBD 807 DPRINTF(("wsmux_set_display: %s set rawkbd=%d\n", 808 me->me_dv.dv_xname, sc->sc_rawkbd)); 809 (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, 810 &sc->sc_rawkbd, 0, 0); 811 #endif 812 } 813 } 814 } 815 if (ok) 816 error = 0; 817 818 if (displaydv == NULL) 819 printf("%s: disconnecting from %s\n", 820 sc->sc_base.me_dv.dv_xname, odisplaydv->dv_xname); 821 822 return (error); 823 } 824 #endif /* NWSDISPLAY > 0 */ 825
Indexes created Tue Sep 23 07:09:52 GMT 2025