4 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
6 * This code is derived from software contributed to The DragonFly Project
7 * by Matthew Dillon <dillon@backplane.com>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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
17 * the documentation and/or other materials provided with the
19 * 3. Neither the name of The DragonFly Project nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific, prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
27 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
29 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
31 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
43 #include <sys/fcntl.h>
44 #include <sys/signalvar.h>
45 #include <sys/eventhandler.h>
46 #include <sys/interrupt.h>
48 #include <machine/md_var.h>
53 static int console_stolen_by_kernel;
54 static struct kqueue_info *kqueue_console_info;
56 /************************************************************************
58 ************************************************************************
62 static int vcons_tty_param(struct tty *tp, struct termios *tio);
63 static void vcons_tty_start(struct tty *tp);
64 static void vcons_intr(void *tpx, struct intrframe *frame __unused);
66 static d_open_t vcons_open;
67 static d_close_t vcons_close;
68 static d_ioctl_t vcons_ioctl;
70 static struct dev_ops vcons_ops = {
71 { "vcons", 0, D_TTY },
73 .d_close = vcons_close,
76 .d_ioctl = vcons_ioctl,
77 .d_kqfilter = ttykqfilter
81 vcons_open(struct dev_open_args *ap)
83 cdev_t dev = ap->a_head.a_dev;
87 lwkt_gettoken(&tty_token);
88 tp = dev->si_tty = ttymalloc(dev->si_tty);
90 #define ISSET(t, f) ((t) & (f))
92 if ((tp->t_state & TS_ISOPEN) == 0) {
93 tp->t_oproc = vcons_tty_start;
94 tp->t_param = vcons_tty_param;
95 tp->t_stop = nottystop;
98 tp->t_state |= TS_CARR_ON | TS_CONNECTED;
100 tp->t_iflag = TTYDEF_IFLAG;
101 tp->t_oflag = TTYDEF_OFLAG;
102 tp->t_cflag = TTYDEF_CFLAG;
103 tp->t_lflag = TTYDEF_LFLAG;
104 tp->t_ispeed = TTYDEF_SPEED;
105 tp->t_ospeed = TTYDEF_SPEED;
108 if (minor(dev) == 0) {
109 error = (*linesw[tp->t_line].l_open)(dev, tp);
110 ioctl(0, TIOCGWINSZ, &tp->t_winsize);
112 if (kqueue_console_info == NULL)
113 kqueue_console_info = kqueue_add(0, vcons_intr, tp);
115 /* dummy up other minors so the installer will run */
118 lwkt_reltoken(&tty_token);
123 vcons_close(struct dev_close_args *ap)
125 cdev_t dev = ap->a_head.a_dev;
128 lwkt_gettoken(&tty_token);
130 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
132 lwkt_reltoken(&tty_token);
137 vcons_ioctl(struct dev_ioctl_args *ap)
139 cdev_t dev = ap->a_head.a_dev;
143 lwkt_gettoken(&tty_token);
145 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
146 ap->a_fflag, ap->a_cred);
147 if (error != ENOIOCTL) {
148 lwkt_reltoken(&tty_token);
151 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
152 if (error != ENOIOCTL) {
153 lwkt_reltoken(&tty_token);
156 lwkt_reltoken(&tty_token);
161 vcons_tty_param(struct tty *tp, struct termios *tio)
163 lwkt_gettoken(&tty_token);
164 tp->t_ispeed = tio->c_ispeed;
165 tp->t_ospeed = tio->c_ospeed;
166 tp->t_cflag = tio->c_cflag;
167 lwkt_reltoken(&tty_token);
172 vcons_tty_start(struct tty *tp)
177 lwkt_gettoken(&tty_token);
178 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
180 lwkt_reltoken(&tty_token);
183 tp->t_state |= TS_BUSY;
184 while ((n = q_to_b(&tp->t_outq, buf, sizeof(buf))) > 0) {
186 * Dummy up ttyv1, etc.
188 if (minor(tp->t_dev) == 0) {
189 pwrite(1, buf, n, -1);
192 tp->t_state &= ~TS_BUSY;
193 lwkt_reltoken(&tty_token);
199 vcons_intr(void *tpx, struct intrframe *frame __unused)
201 struct tty *tp = tpx;
202 unsigned char buf[32];
206 lwkt_gettoken(&tty_token);
208 * If we aren't open we only have synchronous traffic via the
209 * debugger and do not need to poll.
211 if ((tp->t_state & TS_ISOPEN) == 0) {
212 lwkt_reltoken(&tty_token);
217 * Only poll if we are open and haven't been stolen by the debugger.
219 if (console_stolen_by_kernel == 0 && (tp->t_state & TS_ISOPEN)) {
221 n = extpread(0, buf, sizeof(buf), O_FNONBLOCKING, -1LL);
222 for (i = 0; i < n; ++i)
223 (*linesw[tp->t_line].l_rint)(buf[i], tp);
226 lwkt_reltoken(&tty_token);
229 /************************************************************************
230 * KERNEL CONSOLE INTERFACE *
231 ************************************************************************
233 * Kernel direct-call interface console driver
235 static cn_probe_t vconsprobe;
236 static cn_init_t vconsinit;
237 static cn_init_fini_t vconsinit_fini;
238 static cn_term_t vconsterm;
239 static cn_getc_t vconsgetc;
240 static cn_checkc_t vconscheckc;
241 static cn_putc_t vconsputc;
243 CONS_DRIVER(vcons, vconsprobe, vconsinit, vconsinit_fini, vconsterm, vconsgetc,
244 vconscheckc, vconsputc, NULL, NULL);
246 static struct termios init_tio;
247 static struct consdev *vconsole;
250 vconsprobe(struct consdev *cp)
252 cp->cn_pri = CN_NORMAL;
253 cp->cn_probegood = 1;
257 * This is a little bulky handler to set proper terminal
258 * settings in the case of a signal which might lead to
259 * termination or suspension.
264 struct termios curtio;
265 struct sigaction sa, osa;
268 tcgetattr(0, &curtio);
269 tcsetattr(0, TCSAFLUSH, &init_tio);
270 bzero(&sa, sizeof(sa));
271 sigemptyset(&sa.sa_mask);
272 sa.sa_handler = SIG_DFL;
273 sigaction(sig, &sa, &osa);
276 sigprocmask(SIG_UNBLOCK, &ss, &oss);
277 raise(sig); /* now hand down the sig */
278 sigprocmask(SIG_SETMASK, &oss, NULL);
279 sigaction(sig, &osa, NULL);
280 tcsetattr(0, TCSAFLUSH, &curtio);
284 vconswinchsig(int __unused sig)
290 vconswinch_intr(void *arg __unused, void *frame __unused)
292 struct winsize newsize;
294 if (vconsole != NULL && vconsole->cn_dev->si_tty != NULL) {
295 ioctl(0, TIOCGWINSZ, &newsize);
297 * ttioctl(vconsole->cn_dev->si_tty, TIOCSWINSZ, &newsize, 0);
298 * I wished. Unfortunately this needs a curproc, so do it
301 if (bcmp(&newsize, &vconsole->cn_dev->si_tty->t_winsize,
302 sizeof(newsize)) != 0) {
303 vconsole->cn_dev->si_tty->t_winsize = newsize;
304 pgsignal(vconsole->cn_dev->si_tty->t_pgrp, SIGWINCH, 1);
313 * We might catch stray SIGIOs, so try hard.
315 while (tcsetattr(0, TCSAFLUSH, &init_tio) != 0 && errno == EINTR)
320 vconsinit(struct consdev *cp)
326 tcgetattr(0, &init_tio);
327 bzero(&sa, sizeof(sa));
328 sigemptyset(&sa.sa_mask);
329 sa.sa_handler = vconssignal;
330 sigaction(SIGTSTP, &sa, NULL);
331 sigaction(SIGINT, &sa, NULL);
332 sigaction(SIGTERM, &sa, NULL);
333 atexit(vconscleanup);
338 vconsinit_fini(struct consdev *cp)
345 * We have to do this here rather then in early boot to be able
346 * to use the interrupt subsystem.
348 register_int_virtual(3, vconswinch_intr, NULL, "swinch", NULL,
350 bzero(&sa, sizeof(sa));
351 sigemptyset(&sa.sa_mask);
352 sa.sa_handler = vconswinchsig;
353 sigaction(SIGWINCH, &sa, NULL);
356 * Implement ttyv0-ttyv7. At the moment ttyv1-7 are sink nulls.
358 for (i = 0; i < 8; ++i) {
359 dev = make_dev(&vcons_ops, i,
360 UID_ROOT, GID_WHEEL, 0600, "ttyv%d", i);
365 EVENTHANDLER_REGISTER(shutdown_final, vconscleanup, NULL, SHUTDOWN_PRI_LAST);
369 vconsterm(struct consdev *vp)
376 vconsgetc(void *private)
381 console_stolen_by_kernel = 1;
383 n = pread(0, &c, 1, -1);
386 if (n < 0 && errno == EINTR)
388 panic("vconsgetc: EOF on console %jd %d", (intmax_t)n, errno);
390 console_stolen_by_kernel = 0;
395 vconscheckc(void *private)
399 if (extpread(0, &c, 1, O_FNONBLOCKING, -1LL) == 1)
405 vconsputc(void *private, int c)
409 pwrite(1, &cc, 1, -1);
413 vcons_set_mode(int in_debugger)
417 if (tcgetattr(0, &tio) < 0) {
421 tio.c_oflag |= OPOST | ONLCR;
424 tio.c_cc[VINTR] = init_tio.c_cc[VINTR];
425 tio.c_cc[VSUSP] = init_tio.c_cc[VSUSP];
426 tio.c_cc[VSTATUS] = init_tio.c_cc[VSTATUS];
428 tio.c_cc[VINTR] = _POSIX_VDISABLE;
429 tio.c_cc[VSUSP] = _POSIX_VDISABLE;
430 tio.c_cc[VSTATUS] = _POSIX_VDISABLE;
432 tcsetattr(0, TCSAFLUSH, &tio);