/*
* Retry wait for characters, for read.
* No locks may be held.
* May run on any CPU - does not talk to device driver.
*/
boolean_t char_read_done(
register io_req_t ior)
{
register struct tty *tp = (struct tty *)ior->io_dev_ptr;
register spl_t s = spltty();
simple_lock(&tp->t_lock);
if (tp->t_inq.c_cc <= 0 ||
(tp->t_state & TS_CARR_ON) == 0) {
queue_delayed_reply(&tp->t_delayed_read, ior, char_read_done);
simple_unlock(&tp->t_lock);
splx(s);
return FALSE;
}
ior->io_residual = ior->io_count - q_to_b(&tp->t_inq,
ior->io_data,
(int)ior->io_count);
if (tp->t_state & TS_RTS_DOWN) {
(*tp->t_mctl)(tp, TM_RTS, DMBIS);
tp->t_state &= ~TS_RTS_DOWN;
}
simple_unlock(&tp->t_lock);
splx(s);
(void) ds_read_done(ior);
return TRUE;
}
boolean_t
kbd_read_done(
io_req_t ior)
{
register int s, count;
s = SPLKD();
kdq_lock(&kbd_queue);
if (kdq_empty(&kbd_queue)) {
ior->io_done = kbd_read_done;
mpenqueue_tail(&kbd_read_queue, (queue_entry_t)ior);
kdq_unlock(&kbd_queue);
splx(s);
return (FALSE);
}
count = 0;
while (!kdq_empty(&kbd_queue) && count < ior->io_count) {
register kd_event *ev;
ev = kdq_get(&kbd_queue);
*(kd_event *)(&ior->io_data[count]) = *ev;
count += sizeof(kd_event);
}
kdq_unlock(&kbd_queue);
splx(s);
ior->io_residual = ior->io_count - count;
ds_read_done(ior);
return (TRUE);
}
boolean_t tty_close_read_reply(
register io_req_t ior)
{
ior->io_residual = ior->io_count;
ior->io_error = D_DEVICE_DOWN;
(void) ds_read_done(ior);
return TRUE;
}
