dev/i386/km.c

75 static int kmoutput(struct tty *tp);
76 static void kmstart(struct tty *tp);
95 	struct tty *tp;
103 	tp = km_tty[unit];
105 	tty_lock(tp);
107 	tp->t_oproc = kmstart;
108 	tp->t_param = NULL;
109 	tp->t_dev = dev;
111 	if ( !(tp->t_state & TS_ISOPEN) ) {
112 		tp->t_iflag = TTYDEF_IFLAG;
113 		tp->t_oflag = TTYDEF_OFLAG;
114 		tp->t_cflag = (CREAD | CS8 | CLOCAL);
115 		tp->t_lflag = TTYDEF_LFLAG;
116 		tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
117 		termioschars(&tp->t_termios);
118 		ttsetwater(tp);
119 	} else if ((tp->t_state & TS_XCLUDE) && proc_suser(pp)) {
124 	tp->t_state |= TS_CARR_ON; /* lie and say carrier exists and is on. */
126 	ret = ((*linesw[tp->t_line].l_open)(dev, tp));
129 		wp = &tp->t_winsize;
137 		tty_unlock(tp);		/* XXX race window */
145 		tty_lock(tp);
157 	tty_unlock(tp);
166 	struct tty *tp = km_tty[minor(dev)];
168 	tty_lock(tp);
169 	ret = (*linesw[tp->t_line].l_close)(tp,flag);
170 	ttyclose(tp);
171 	tty_unlock(tp);
180 	struct tty *tp = km_tty[minor(dev)];
182 	tty_lock(tp);
183 	ret = (*linesw[tp->t_line].l_read)(tp, uio, ioflag);
184 	tty_unlock(tp);
193 	struct tty *tp = km_tty[minor(dev)];
195 	tty_lock(tp);
196 	ret = (*linesw[tp->t_line].l_write)(tp, uio, ioflag);
197 	tty_unlock(tp);
206 	struct tty *tp = km_tty[minor(dev)];
209 	tty_lock(tp);
214 		*wp = tp->t_winsize;
245 		error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
248 		error = ttioctl_locked(tp, cmd, data, flag, p);
252 	tty_unlock(tp);
263  * Locks:       Assumes tp in the calling tty driver code is locked on
293  * Locks:	Assumes tp is locked on entry, remains locked on exit
296 kmstart(struct tty *tp)
298 	if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
300 	if (tp->t_outq.c_cc == 0)
302 	tp->t_state |= TS_BUSY;
303 	kmoutput(tp);
307 	(*linesw[tp->t_line].l_start)(tp);
322 	struct tty	*tp = (struct tty *)arg;
324 	tty_lock(tp);
325 	(void)kmoutput(tp);
326 	tty_unlock(tp);
332  * Locks:	Assumes tp is locked on entry, remains locked on exit
341 kmoutput(struct tty *tp)
349 	while (tp->t_outq.c_cc > 0) {
350 		cc = ndqb(&tp->t_outq, 0);
359 		(void) q_to_b(&tp->t_outq, buf, cc);
362 			kmputc(tp->t_dev, *cp & 0x7f);
369         if (tp->t_outq.c_cc > 0) {
370 		timeout(kmtimeout, tp, hz);
372 	tp->t_state &= ~TS_BUSY;
374 	(*linesw[tp->t_line].l_start)(tp);
388  * Locks:       Assumes that the tty_lock() is NOT held on the tp, so a
397 	struct tty *tp = km_tty[0];	/* XXX */
399 	tty_lock(tp);
400 	(*linesw[tp->t_line].l_rint) (ch, tp);
401 	tty_unlock(tp);