| 1 | /* $NetBSD: wsmux.c,v 1.61 2016/07/07 06:55:42 msaitoh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1998, 2005 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Author: Lennart Augustsson <lennart@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 1.61 2016/07/07 06:55:42 msaitoh 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" , |
| 501 | device_xname(sc->sc_base.me_dv))); |
| 502 | evar = sc->sc_base.me_evp; |
| 503 | if (evar == NULL) |
| 504 | return (EINVAL); |
| 505 | return wsevent_setversion(evar, *(int *)data); |
| 506 | |
| 507 | case FIONBIO: |
| 508 | DPRINTF(("%s: FIONBIO\n" , device_xname(sc->sc_base.me_dv))); |
| 509 | return (0); |
| 510 | |
| 511 | case FIOASYNC: |
| 512 | DPRINTF(("%s: FIOASYNC\n" , device_xname(sc->sc_base.me_dv))); |
| 513 | evar = sc->sc_base.me_evp; |
| 514 | if (evar == NULL) |
| 515 | return (EINVAL); |
| 516 | evar->async = *(int *)data != 0; |
| 517 | return (0); |
| 518 | case FIOSETOWN: |
| 519 | DPRINTF(("%s: FIOSETOWN\n" , device_xname(sc->sc_base.me_dv))); |
| 520 | evar = sc->sc_base.me_evp; |
| 521 | if (evar == NULL) |
| 522 | return (EINVAL); |
| 523 | if (-*(int *)data != evar->io->p_pgid |
| 524 | && *(int *)data != evar->io->p_pid) |
| 525 | return (EPERM); |
| 526 | return (0); |
| 527 | case TIOCSPGRP: |
| 528 | DPRINTF(("%s: TIOCSPGRP\n" , device_xname(sc->sc_base.me_dv))); |
| 529 | evar = sc->sc_base.me_evp; |
| 530 | if (evar == NULL) |
| 531 | return (EINVAL); |
| 532 | if (*(int *)data != evar->io->p_pgid) |
| 533 | return (EPERM); |
| 534 | return (0); |
| 535 | default: |
| 536 | DPRINTF(("%s: unknown\n" , device_xname(sc->sc_base.me_dv))); |
| 537 | break; |
| 538 | } |
| 539 | |
| 540 | if (sc->sc_base.me_evp == NULL |
| 541 | #if NWSDISPLAY > 0 |
| 542 | && sc->sc_base.me_dispdv == NULL |
| 543 | #endif |
| 544 | ) |
| 545 | return (EACCES); |
| 546 | |
| 547 | /* Return 0 if any of the ioctl() succeeds, otherwise the last error */ |
| 548 | error = 0; |
| 549 | ok = 0; |
| 550 | TAILQ_FOREACH(me, &sc->sc_cld, me_next) { |
| 551 | #ifdef DIAGNOSTIC |
| 552 | /* XXX check evp? */ |
| 553 | if (me->me_parent != sc) { |
| 554 | printf("wsmux_do_ioctl: bad child %p\n" , me); |
| 555 | continue; |
| 556 | } |
| 557 | #endif |
| 558 | error = wsevsrc_ioctl(me, cmd, data, flag, lwp); |
| 559 | DPRINTF(("wsmux_do_ioctl: %s: me=%p dev=%s ==> %d\n" , |
| 560 | device_xname(sc->sc_base.me_dv), me, |
| 561 | device_xname(me->me_dv), error)); |
| 562 | if (!error) |
| 563 | ok = 1; |
| 564 | } |
| 565 | if (ok) { |
| 566 | error = 0; |
| 567 | if (cmd == WSKBDIO_SETENCODING) { |
| 568 | sc->sc_kbd_layout = *((kbd_t *)data); |
| 569 | } |
| 570 | |
| 571 | } |
| 572 | |
| 573 | return (error); |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * poll() of the pseudo device from device table. |
| 578 | */ |
| 579 | int |
| 580 | wsmuxpoll(dev_t dev, int events, struct lwp *l) |
| 581 | { |
| 582 | int minr = minor(dev); |
| 583 | struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; |
| 584 | |
| 585 | if (WSMUXCTL(minr)) { |
| 586 | /* control device */ |
| 587 | return (0); |
| 588 | } |
| 589 | |
| 590 | if (sc->sc_base.me_evp == NULL) { |
| 591 | #ifdef DIAGNOSTIC |
| 592 | printf("wsmuxpoll: not open\n" ); |
| 593 | #endif |
| 594 | return (POLLHUP); |
| 595 | } |
| 596 | |
| 597 | return (wsevent_poll(sc->sc_base.me_evp, events, l)); |
| 598 | } |
| 599 | |
| 600 | /* |
| 601 | * kqfilter() of the pseudo device from device table. |
| 602 | */ |
| 603 | int |
| 604 | wsmuxkqfilter(dev_t dev, struct knote *kn) |
| 605 | { |
| 606 | int minr = minor(dev); |
| 607 | struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)]; |
| 608 | |
| 609 | if (WSMUXCTL(minr)) { |
| 610 | /* control device */ |
| 611 | return (1); |
| 612 | } |
| 613 | |
| 614 | if (sc->sc_base.me_evp == NULL) { |
| 615 | #ifdef DIAGNOSTIC |
| 616 | printf("wsmuxkqfilter: not open\n" ); |
| 617 | #endif |
| 618 | return (1); |
| 619 | } |
| 620 | |
| 621 | return (wsevent_kqfilter(sc->sc_base.me_evp, kn)); |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Add mux unit as a child to muxsc. |
| 626 | */ |
| 627 | int |
| 628 | wsmux_add_mux(int unit, struct wsmux_softc *muxsc) |
| 629 | { |
| 630 | struct wsmux_softc *sc, *m; |
| 631 | |
| 632 | sc = wsmux_getmux(unit); |
| 633 | if (sc == NULL) |
| 634 | return (ENXIO); |
| 635 | |
| 636 | DPRINTF(("wsmux_add_mux: %s(%p) to %s(%p)\n" , |
| 637 | device_xname(sc->sc_base.me_dv), sc, |
| 638 | device_xname(muxsc->sc_base.me_dv), muxsc)); |
| 639 | |
| 640 | if (sc->sc_base.me_parent != NULL || sc->sc_base.me_evp != NULL) |
| 641 | return (EBUSY); |
| 642 | |
| 643 | /* The mux we are adding must not be an ancestor of itself. */ |
| 644 | for (m = muxsc; m != NULL ; m = m->sc_base.me_parent) |
| 645 | if (m == sc) |
| 646 | return (EINVAL); |
| 647 | |
| 648 | return (wsmux_attach_sc(muxsc, &sc->sc_base)); |
| 649 | } |
| 650 | |
| 651 | /* Create a new mux softc. */ |
| 652 | struct wsmux_softc * |
| 653 | wsmux_create(const char *name, int unit) |
| 654 | { |
| 655 | struct wsmux_softc *sc; |
| 656 | |
| 657 | /* XXX This is wrong -- should use autoconfiguraiton framework */ |
| 658 | |
| 659 | DPRINTF(("wsmux_create: allocating\n" )); |
| 660 | sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT|M_ZERO); |
| 661 | if (sc == NULL) |
| 662 | return (NULL); |
| 663 | sc->sc_base.me_dv = malloc(sizeof(struct device), M_DEVBUF, |
| 664 | M_NOWAIT|M_ZERO); |
| 665 | if (sc->sc_base.me_dv == NULL) { |
| 666 | free(sc, M_DEVBUF); |
| 667 | return NULL; |
| 668 | } |
| 669 | TAILQ_INIT(&sc->sc_cld); |
| 670 | snprintf(sc->sc_base.me_dv->dv_xname, |
| 671 | sizeof sc->sc_base.me_dv->dv_xname, "%s%d" , name, unit); |
| 672 | sc->sc_base.me_dv->dv_private = sc; |
| 673 | sc->sc_base.me_dv->dv_unit = unit; |
| 674 | sc->sc_base.me_ops = &wsmux_srcops; |
| 675 | sc->sc_kbd_layout = KB_NONE; |
| 676 | return (sc); |
| 677 | } |
| 678 | |
| 679 | /* Attach me as a child to sc. */ |
| 680 | int |
| 681 | wsmux_attach_sc(struct wsmux_softc *sc, struct wsevsrc *me) |
| 682 | { |
| 683 | int error; |
| 684 | |
| 685 | if (sc == NULL) |
| 686 | return (EINVAL); |
| 687 | |
| 688 | DPRINTF(("wsmux_attach_sc: %s(%p): type=%d\n" , |
| 689 | device_xname(sc->sc_base.me_dv), sc, me->me_ops->type)); |
| 690 | |
| 691 | #ifdef DIAGNOSTIC |
| 692 | if (me->me_parent != NULL) { |
| 693 | printf("wsmux_attach_sc: busy\n" ); |
| 694 | return (EBUSY); |
| 695 | } |
| 696 | #endif |
| 697 | me->me_parent = sc; |
| 698 | TAILQ_INSERT_TAIL(&sc->sc_cld, me, me_next); |
| 699 | |
| 700 | error = 0; |
| 701 | #if NWSDISPLAY > 0 |
| 702 | if (sc->sc_base.me_dispdv != NULL) { |
| 703 | /* This is a display mux, so attach the new device to it. */ |
| 704 | DPRINTF(("wsmux_attach_sc: %s: set display %p\n" , |
| 705 | device_xname(sc->sc_base.me_dv), |
| 706 | sc->sc_base.me_dispdv)); |
| 707 | if (me->me_ops->dsetdisplay != NULL) { |
| 708 | error = wsevsrc_set_display(me, &sc->sc_base); |
| 709 | /* Ignore that the console already has a display. */ |
| 710 | if (error == EBUSY) |
| 711 | error = 0; |
| 712 | if (!error) { |
| 713 | #ifdef WSDISPLAY_COMPAT_RAWKBD |
| 714 | DPRINTF(("wsmux_attach_sc: %s set rawkbd=%d\n" , |
| 715 | device_xname(me->me_dv), |
| 716 | sc->sc_rawkbd)); |
| 717 | (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, |
| 718 | &sc->sc_rawkbd, 0, 0); |
| 719 | #endif |
| 720 | if (sc->sc_kbd_layout != KB_NONE) |
| 721 | (void)wsevsrc_ioctl(me, |
| 722 | WSKBDIO_SETENCODING, |
| 723 | &sc->sc_kbd_layout, FWRITE, 0); |
| 724 | } |
| 725 | } |
| 726 | } |
| 727 | #endif |
| 728 | if (sc->sc_base.me_evp != NULL) { |
| 729 | /* Mux is open, so open the new subdevice */ |
| 730 | DPRINTF(("wsmux_attach_sc: %s: calling open of %s\n" , |
| 731 | device_xname(sc->sc_base.me_dv), |
| 732 | device_xname(me->me_dv))); |
| 733 | error = wsevsrc_open(me, sc->sc_base.me_evp); |
| 734 | } else { |
| 735 | DPRINTF(("wsmux_attach_sc: %s not open\n" , |
| 736 | device_xname(sc->sc_base.me_dv))); |
| 737 | } |
| 738 | |
| 739 | if (error) { |
| 740 | me->me_parent = NULL; |
| 741 | TAILQ_REMOVE(&sc->sc_cld, me, me_next); |
| 742 | } |
| 743 | |
| 744 | DPRINTF(("wsmux_attach_sc: %s(%p) done, error=%d\n" , |
| 745 | device_xname(sc->sc_base.me_dv), sc, error)); |
| 746 | return (error); |
| 747 | } |
| 748 | |
| 749 | /* Remove me from the parent. */ |
| 750 | void |
| 751 | wsmux_detach_sc(struct wsevsrc *me) |
| 752 | { |
| 753 | struct wsmux_softc *sc = me->me_parent; |
| 754 | |
| 755 | DPRINTF(("wsmux_detach_sc: %s(%p) parent=%p\n" , |
| 756 | device_xname(me->me_dv), me, sc)); |
| 757 | |
| 758 | #ifdef DIAGNOSTIC |
| 759 | if (sc == NULL) { |
| 760 | printf("wsmux_detach_sc: %s has no parent\n" , |
| 761 | device_xname(me->me_dv)); |
| 762 | return; |
| 763 | } |
| 764 | #endif |
| 765 | |
| 766 | #if NWSDISPLAY > 0 |
| 767 | if (sc->sc_base.me_dispdv != NULL) { |
| 768 | if (me->me_ops->dsetdisplay != NULL) |
| 769 | /* ignore error, there's nothing we can do */ |
| 770 | (void)wsevsrc_set_display(me, NULL); |
| 771 | } else |
| 772 | #endif |
| 773 | if (me->me_evp != NULL) { |
| 774 | DPRINTF(("wsmux_detach_sc: close\n" )); |
| 775 | /* mux device is open, so close multiplexee */ |
| 776 | (void)wsevsrc_close(me); |
| 777 | } |
| 778 | |
| 779 | TAILQ_REMOVE(&sc->sc_cld, me, me_next); |
| 780 | me->me_parent = NULL; |
| 781 | |
| 782 | DPRINTF(("wsmux_detach_sc: done sc=%p\n" , sc)); |
| 783 | } |
| 784 | |
| 785 | /* |
| 786 | * Display ioctl() of a mux via the parent mux. |
| 787 | */ |
| 788 | int |
| 789 | wsmux_do_displayioctl(device_t dv, u_long cmd, void *data, int flag, |
| 790 | struct lwp *l) |
| 791 | { |
| 792 | struct wsmux_softc *sc = device_private(dv); |
| 793 | struct wsevsrc *me; |
| 794 | int error, ok; |
| 795 | |
| 796 | DPRINTF(("wsmux_displayioctl: %s: sc=%p, cmd=%08lx\n" , |
| 797 | device_xname(sc->sc_base.me_dv), sc, cmd)); |
| 798 | |
| 799 | #ifdef WSDISPLAY_COMPAT_RAWKBD |
| 800 | if (cmd == WSKBDIO_SETMODE) { |
| 801 | sc->sc_rawkbd = *(int *)data; |
| 802 | DPRINTF(("wsmux_displayioctl: rawkbd = %d\n" , sc->sc_rawkbd)); |
| 803 | } |
| 804 | #endif |
| 805 | |
| 806 | /* |
| 807 | * Return 0 if any of the ioctl() succeeds, otherwise the last error. |
| 808 | * Return EPASSTHROUGH if no mux component accepts the ioctl. |
| 809 | */ |
| 810 | error = EPASSTHROUGH; |
| 811 | ok = 0; |
| 812 | TAILQ_FOREACH(me, &sc->sc_cld, me_next) { |
| 813 | DPRINTF(("wsmux_displayioctl: me=%p\n" , me)); |
| 814 | #ifdef DIAGNOSTIC |
| 815 | if (me->me_parent != sc) { |
| 816 | printf("wsmux_displayioctl: bad child %p\n" , me); |
| 817 | continue; |
| 818 | } |
| 819 | #endif |
| 820 | if (me->me_ops->ddispioctl != NULL) { |
| 821 | error = wsevsrc_display_ioctl(me, cmd, data, flag, l); |
| 822 | DPRINTF(("wsmux_displayioctl: me=%p dev=%s ==> %d\n" , |
| 823 | me, device_xname(me->me_dv), error)); |
| 824 | if (!error) |
| 825 | ok = 1; |
| 826 | } |
| 827 | } |
| 828 | if (ok) |
| 829 | error = 0; |
| 830 | |
| 831 | return (error); |
| 832 | } |
| 833 | |
| 834 | #if NWSDISPLAY > 0 |
| 835 | /* |
| 836 | * Set display of a mux via the parent mux. |
| 837 | */ |
| 838 | int |
| 839 | wsmux_evsrc_set_display(device_t dv, struct wsevsrc *ame) |
| 840 | { |
| 841 | struct wsmux_softc *muxsc = (struct wsmux_softc *)ame; |
| 842 | struct wsmux_softc *sc = device_private(dv); |
| 843 | device_t displaydv = muxsc ? muxsc->sc_base.me_dispdv : NULL; |
| 844 | |
| 845 | DPRINTF(("wsmux_set_display: %s: displaydv=%p\n" , |
| 846 | device_xname(sc->sc_base.me_dv), displaydv)); |
| 847 | |
| 848 | if (displaydv != NULL) { |
| 849 | if (sc->sc_base.me_dispdv != NULL) |
| 850 | return (EBUSY); |
| 851 | } else { |
| 852 | if (sc->sc_base.me_dispdv == NULL) |
| 853 | return (ENXIO); |
| 854 | } |
| 855 | |
| 856 | return wsmux_set_display(sc, displaydv); |
| 857 | } |
| 858 | |
| 859 | int |
| 860 | wsmux_set_display(struct wsmux_softc *sc, device_t displaydv) |
| 861 | { |
| 862 | device_t odisplaydv; |
| 863 | struct wsevsrc *me; |
| 864 | struct wsmux_softc *nsc = displaydv ? sc : NULL; |
| 865 | int error, ok; |
| 866 | |
| 867 | odisplaydv = sc->sc_base.me_dispdv; |
| 868 | sc->sc_base.me_dispdv = displaydv; |
| 869 | |
| 870 | if (displaydv) |
| 871 | aprint_verbose_dev(sc->sc_base.me_dv, "connecting to %s\n" , |
| 872 | device_xname(displaydv)); |
| 873 | ok = 0; |
| 874 | error = 0; |
| 875 | TAILQ_FOREACH(me, &sc->sc_cld,me_next) { |
| 876 | #ifdef DIAGNOSTIC |
| 877 | if (me->me_parent != sc) { |
| 878 | printf("wsmux_set_display: bad child parent %p\n" , me); |
| 879 | continue; |
| 880 | } |
| 881 | #endif |
| 882 | if (me->me_ops->dsetdisplay != NULL) { |
| 883 | error = wsevsrc_set_display(me, &nsc->sc_base); |
| 884 | DPRINTF(("wsmux_set_display: m=%p dev=%s error=%d\n" , |
| 885 | me, device_xname(me->me_dv), error)); |
| 886 | if (!error) { |
| 887 | ok = 1; |
| 888 | #ifdef WSDISPLAY_COMPAT_RAWKBD |
| 889 | DPRINTF(("wsmux_set_display: %s set rawkbd=%d\n" , |
| 890 | device_xname(me->me_dv), sc->sc_rawkbd)); |
| 891 | (void)wsevsrc_ioctl(me, WSKBDIO_SETMODE, |
| 892 | &sc->sc_rawkbd, 0, 0); |
| 893 | #endif |
| 894 | } |
| 895 | } |
| 896 | } |
| 897 | if (ok) |
| 898 | error = 0; |
| 899 | |
| 900 | if (displaydv == NULL) |
| 901 | aprint_verbose("%s: disconnecting from %s\n" , |
| 902 | device_xname(sc->sc_base.me_dv), |
| 903 | device_xname(odisplaydv)); |
| 904 | |
| 905 | return (error); |
| 906 | } |
| 907 | #endif /* NWSDISPLAY > 0 */ |
| 908 | |