/* ARGSUSED */
int
pppopen(struct rtems_termios_tty *tty)
{
int i;
register struct ppp_softc *sc;
struct mbuf *m = (struct mbuf *)0;
if (tty->t_line == PPPDISC) {
sc = (struct ppp_softc *)tty->t_sc;
if (sc != NULL && sc->sc_devp == (void *)tty) {
return (0);
}
}
if ((sc = pppalloc(1)) == NULL) {
return ENXIO;
}
if (sc->sc_relinq)
(*sc->sc_relinq)(sc); /* get previous owner to relinquish the unit */
sc->sc_ilen = 0;
sc->sc_m = NULL;
bzero(sc->sc_asyncmap, sizeof(sc->sc_asyncmap));
sc->sc_asyncmap[0] = 0xffffffff;
sc->sc_asyncmap[3] = 0x60000000;
sc->sc_rasyncmap = 0;
sc->sc_devp = tty;
sc->sc_start = pppasyncstart;
sc->sc_ctlp = pppasyncctlp;
sc->sc_relinq = pppasyncrelinq;
sc->sc_outm = NULL;
sc->sc_outmc = NULL;
/* preallocate mbufs for free queue */
rtems_bsdnet_semaphore_obtain();
for (i=0; i<NUM_MBUFQ; i++) {
pppallocmbuf(sc, &m);
if ( i == 0 ) {
/* use first mbuf for rx iterrupt handling */
sc->sc_m = m;
}
else {
/* enqueue mbuf for later use */
IF_ENQUEUE(&sc->sc_freeq, m);
}
m = (struct mbuf *)0;
}
rtems_bsdnet_semaphore_release();
/* initialize values */
sc->sc_if.if_flags |= IFF_RUNNING;
sc->sc_if.if_baudrate =
rtems_termios_baud_to_number(tty->termios.c_cflag & CBAUD);
tty->t_sc = (void *)sc;
return ( RTEMS_SUCCESSFUL );
}
static rtems_task ppp_rxdaemon(rtems_task_argument arg)
{
rtems_event_set events;
rtems_interrupt_level level;
struct ppp_softc *sc = (struct ppp_softc *)arg;
struct mbuf *mp = (struct mbuf *)0;
struct mbuf *m;
/* enter processing loop */
while ( 1 ) {
/* wait for event */
rtems_event_receive(RX_PACKET|RX_MBUF|RX_EMPTY,RTEMS_WAIT|RTEMS_EVENT_ANY,RTEMS_NO_TIMEOUT,&events);
if ( events & RX_EMPTY ) {
printf("RX: QUEUE is EMPTY\n");
events &= ~RX_EMPTY;
}
if ( events ) {
/* get the network semaphore */
rtems_bsdnet_semaphore_obtain();
/* check to see if new packet was received */
if ( events & RX_PACKET ) {
/* get received packet mbuf chain */
rtems_interrupt_disable(level);
IF_DEQUEUE(&sc->sc_rawq, m);
rtems_interrupt_enable(level);
/* ensure packet was retrieved */
if ( m != (struct mbuf *)0 ) {
/* process the received packet */
mp = ppp_inproc(sc, m);
}
}
/* allocate a new mbuf to replace one */
if ( mp == NULL ) {
pppallocmbuf(sc, &mp);
}
/* place mbuf on freeq */
rtems_interrupt_disable(level);
IF_ENQUEUE(&sc->sc_freeq, mp);
rtems_interrupt_enable(level);
mp = (struct mbuf *)0;
/* release the network semaphore */
rtems_bsdnet_semaphore_release();
/* check to see if queue is empty */
if ( sc->sc_rawq.ifq_head ) {
/* queue is not empty - post another event */
rtems_event_send(sc->sc_rxtask, RX_PACKET);
}
}
}
}