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;
55 static struct tty *kqueue_console_tty;
56 static int vcons_started;
58 /************************************************************************
60 ************************************************************************
64 static int vcons_tty_param(struct tty *tp, struct termios *tio);
65 static void vcons_tty_start(struct tty *tp);
66 static void vcons_hardintr(void *tpx, struct intrframe *frame __unused);
68 static d_open_t vcons_open;
69 static d_close_t vcons_close;
70 static d_ioctl_t vcons_ioctl;
72 static struct dev_ops vcons_ops = {
73 { "vcons", 0, D_TTY },
75 .d_close = vcons_close,
78 .d_ioctl = vcons_ioctl,
79 .d_kqfilter = ttykqfilter
83 vcons_open(struct dev_open_args *ap)
85 cdev_t dev = ap->a_head.a_dev;
89 tp = ttymalloc(&dev->si_tty);
90 lwkt_gettoken(&tp->t_token);
92 #define ISSET(t, f) ((t) & (f))
94 if ((tp->t_state & TS_ISOPEN) == 0) {
95 tp->t_oproc = vcons_tty_start;
96 tp->t_param = vcons_tty_param;
97 tp->t_stop = nottystop;
100 tp->t_state |= TS_CARR_ON | TS_CONNECTED;
102 tp->t_iflag = TTYDEF_IFLAG;
103 tp->t_oflag = TTYDEF_OFLAG;
104 tp->t_cflag = TTYDEF_CFLAG;
105 tp->t_lflag = TTYDEF_LFLAG;
106 tp->t_ispeed = TTYDEF_SPEED;
107 tp->t_ospeed = TTYDEF_SPEED;
110 if (minor(dev) == 0) {
111 error = (*linesw[tp->t_line].l_open)(dev, tp);
112 ioctl(0, TIOCGWINSZ, &tp->t_winsize);
114 if (kqueue_console_info == NULL) {
115 kqueue_console_tty = tp;
116 kqueue_console_info = kqueue_add(0, vcons_hardintr, tp);
119 /* dummy up other minors so the installer will run */
122 lwkt_reltoken(&tp->t_token);
128 vcons_close(struct dev_close_args *ap)
130 cdev_t dev = ap->a_head.a_dev;
134 lwkt_gettoken(&tp->t_token);
135 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
137 lwkt_reltoken(&tp->t_token);
142 vcons_ioctl(struct dev_ioctl_args *ap)
144 cdev_t dev = ap->a_head.a_dev;
149 lwkt_gettoken(&tp->t_token);
150 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
151 ap->a_fflag, ap->a_cred);
152 if (error != ENOIOCTL) {
153 lwkt_reltoken(&tp->t_token);
156 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
157 if (error != ENOIOCTL) {
158 lwkt_reltoken(&tp->t_token);
161 lwkt_reltoken(&tp->t_token);
167 vcons_tty_param(struct tty *tp, struct termios *tio)
169 lwkt_gettoken(&tp->t_token);
170 tp->t_ispeed = tio->c_ispeed;
171 tp->t_ospeed = tio->c_ospeed;
172 tp->t_cflag = tio->c_cflag;
173 lwkt_reltoken(&tp->t_token);
178 vcons_tty_start(struct tty *tp)
183 lwkt_gettoken(&tp->t_token);
184 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
186 lwkt_reltoken(&tp->t_token);
189 tp->t_state |= TS_BUSY;
190 while ((n = clist_qtob(&tp->t_outq, buf, sizeof(buf))) > 0) {
192 * Dummy up ttyv1, etc.
194 if (minor(tp->t_dev) == 0) {
195 pwrite(1, buf, n, -1);
198 tp->t_state &= ~TS_BUSY;
199 lwkt_reltoken(&tp->t_token);
205 vcons_hardintr(void *tpx, struct intrframe *frame __unused)
207 if (console_stolen_by_kernel == 0)
211 /************************************************************************
212 * KERNEL CONSOLE INTERFACE *
213 ************************************************************************
215 * Kernel direct-call interface console driver
217 static cn_probe_t vconsprobe;
218 static cn_init_t vconsinit;
219 static cn_init_fini_t vconsinit_fini;
220 static cn_term_t vconsterm;
221 static cn_getc_t vconsgetc;
222 static cn_checkc_t vconscheckc;
223 static cn_putc_t vconsputc;
225 CONS_DRIVER(vcons, vconsprobe, vconsinit, vconsinit_fini, vconsterm, vconsgetc,
226 vconscheckc, vconsputc, NULL, NULL);
228 static struct termios init_tio;
229 static struct consdev *vconsole;
232 vconsprobe(struct consdev *cp)
234 cp->cn_pri = CN_NORMAL;
235 cp->cn_probegood = 1;
239 * This is a little bulky handler to set proper terminal
240 * settings in the case of a signal which might lead to
241 * termination or suspension.
246 struct termios curtio;
247 struct sigaction sa, osa;
250 tcgetattr(0, &curtio);
251 tcsetattr(0, TCSAFLUSH, &init_tio);
252 bzero(&sa, sizeof(sa));
253 sigemptyset(&sa.sa_mask);
254 sa.sa_handler = SIG_DFL;
255 sigaction(sig, &sa, &osa);
258 sigprocmask(SIG_UNBLOCK, &ss, &oss);
259 raise(sig); /* now hand down the sig */
260 sigprocmask(SIG_SETMASK, &oss, NULL);
261 sigaction(sig, &osa, NULL);
262 tcsetattr(0, TCSAFLUSH, &curtio);
266 vconswinchsig(int __unused sig)
272 vconswinch_intr(void *arg __unused, void *frame __unused)
274 struct winsize newsize;
276 if (vconsole != NULL && vconsole->cn_dev->si_tty != NULL) {
277 ioctl(0, TIOCGWINSZ, &newsize);
279 * ttioctl(vconsole->cn_dev->si_tty, TIOCSWINSZ, &newsize, 0);
280 * I wished. Unfortunately this needs a curproc, so do it
283 if (bcmp(&newsize, &vconsole->cn_dev->si_tty->t_winsize,
284 sizeof(newsize)) != 0) {
285 vconsole->cn_dev->si_tty->t_winsize = newsize;
286 pgsignal(vconsole->cn_dev->si_tty->t_pgrp, SIGWINCH, 1);
292 * This has to be an interrupt thread and not a hard interrupt.
296 vconsvirt_intr(void *arg __unused, void *frame __unused)
299 unsigned char buf[32];
303 if (kqueue_console_info == NULL)
305 tp = kqueue_console_tty;
307 lwkt_gettoken(&tp->t_token);
309 * If we aren't open we only have synchronous traffic via the
310 * debugger and do not need to poll.
312 if ((tp->t_state & TS_ISOPEN) == 0) {
313 lwkt_reltoken(&tp->t_token);
318 * Only poll if we are open and haven't been stolen by the debugger.
320 if (console_stolen_by_kernel == 0 && (tp->t_state & TS_ISOPEN)) {
322 n = extpread(0, buf, sizeof(buf), O_FNONBLOCKING, -1LL);
323 for (i = 0; i < n; ++i)
324 (*linesw[tp->t_line].l_rint)(buf[i], tp);
327 lwkt_reltoken(&tp->t_token);
336 * We might catch stray SIGIOs, so try hard.
338 while (tcsetattr(0, TCSAFLUSH, &init_tio) != 0 && errno == EINTR)
343 vconsinit(struct consdev *cp)
352 tcgetattr(0, &init_tio);
353 bzero(&sa, sizeof(sa));
354 sigemptyset(&sa.sa_mask);
355 sa.sa_handler = vconssignal;
356 sigaction(SIGTSTP, &sa, NULL);
357 sigaction(SIGINT, &sa, NULL);
358 sigaction(SIGTERM, &sa, NULL);
359 atexit(vconscleanup);
364 vconsinit_fini(struct consdev *cp)
371 * We have to do this here rather then in early boot to be able
372 * to use the interrupt subsystem.
374 register_int_virtual(3, vconswinch_intr, NULL, "swinch", NULL,
376 register_int_virtual(4, vconsvirt_intr, NULL, "vintr", NULL,
378 bzero(&sa, sizeof(sa));
379 sigemptyset(&sa.sa_mask);
380 sa.sa_handler = vconswinchsig;
381 sigaction(SIGWINCH, &sa, NULL);
384 * Implement ttyv0-ttyv7. At the moment ttyv1-7 are sink nulls.
386 for (i = 0; i < 8; ++i) {
387 dev = make_dev(&vcons_ops, i,
388 UID_ROOT, GID_WHEEL, 0600, "ttyv%d", i);
393 EVENTHANDLER_REGISTER(shutdown_final, vconscleanup, NULL, SHUTDOWN_PRI_LAST);
397 vconsterm(struct consdev *vp)
404 vconsgetc(void *private)
409 console_stolen_by_kernel = 1;
411 n = pread(0, &c, 1, -1);
414 if (n < 0 && errno == EINTR)
416 panic("vconsgetc: EOF on console %jd %d", (intmax_t)n, errno);
418 console_stolen_by_kernel = 0;
423 vconscheckc(void *private)
427 if (extpread(0, &c, 1, O_FNONBLOCKING, -1LL) == 1)
433 vconsputc(void *private, int c)
437 pwrite(1, &cc, 1, -1);
441 vcons_set_mode(int in_debugger)
445 if (tcgetattr(0, &tio) < 0) {
449 tio.c_oflag |= OPOST | ONLCR;
452 tio.c_cc[VINTR] = init_tio.c_cc[VINTR];
453 tio.c_cc[VSUSP] = init_tio.c_cc[VSUSP];
454 tio.c_cc[VSTATUS] = init_tio.c_cc[VSTATUS];
456 tio.c_cc[VINTR] = _POSIX_VDISABLE;
457 tio.c_cc[VSUSP] = _POSIX_VDISABLE;
458 tio.c_cc[VSTATUS] = _POSIX_VDISABLE;
460 tcsetattr(0, TCSAFLUSH, &tio);