/*
* Software interrupt routine, called at spl[soft]net.
*/
static void
pppintr(netmsg_t msg)
{
struct mbuf *m;
struct ppp_softc *sc;
int i;
/*
* Packets are never sent to this netisr so the message must always
* be replied. Interlock processing and notification by replying
* the message first.
*/
lwkt_replymsg(&msg->lmsg, 0);
get_mplock();
sc = ppp_softc;
for (i = 0; i < NPPP; ++i, ++sc) {
ifnet_serialize_all(&sc->sc_if);
if (!(sc->sc_flags & SC_TBUSY)
&& (!ifq_is_empty(&sc->sc_if.if_snd) || !IF_QEMPTY(&sc->sc_fastq))) {
sc->sc_flags |= SC_TBUSY;
(*sc->sc_start)(sc);
}
for (;;) {
IF_DEQUEUE(&sc->sc_rawq, m);
if (m == NULL)
break;
ppp_inproc(sc, m);
}
ifnet_deserialize_all(&sc->sc_if);
}
rel_mplock();
}
/*
* Watchdog
*/
static void
lgue_watchdog(struct ifnet *ifp)
{
IFNET_STAT_INC(ifp, oerrors, 1);
if (!ifq_is_empty(&ifp->if_snd))
if_devstart_sched(ifp);
}
/*
* Watchdog
*/
static void
lgue_watchdog(struct ifnet *ifp)
{
ifp->if_oerrors++;
if (!ifq_is_empty(&ifp->if_snd))
lgue_start_schedule(ifp);
}
void
ep_intr(void *arg)
{
struct ep_softc *sc = arg;
struct ifnet *ifp = &sc->arpcom.ac_if;
int status;
/*
* quick fix: Try to detect an interrupt when the card goes away.
*/
if (sc->gone || inw(BASE + EP_STATUS) == 0xffff) {
return;
}
outw(BASE + EP_COMMAND, SET_INTR_MASK); /* disable all Ints */
rescan:
while ((status = inw(BASE + EP_STATUS)) & S_5_INTS) {
/* first acknowledge all interrupt sources */
outw(BASE + EP_COMMAND, ACK_INTR | (status & S_MASK));
if (status & (S_RX_COMPLETE | S_RX_EARLY))
epread(sc);
if (status & S_TX_AVAIL) {
/* we need ACK */
ifp->if_timer = 0;
ifq_clr_oactive(&ifp->if_snd);
GO_WINDOW(1);
inw(BASE + EP_W1_FREE_TX);
if_devstart(ifp);
}
if (status & S_CARD_FAILURE) {
ifp->if_timer = 0;
#ifdef EP_LOCAL_STATS
kprintf("\n");
if_printf(ifp, "\n\tStatus: %x\n", status);
GO_WINDOW(4);
kprintf("\tFIFO Diagnostic: %x\n", inw(BASE + EP_W4_FIFO_DIAG));
kprintf("\tStat: %x\n", sc->stat);
kprintf("\tIpackets=%d, Opackets=%d\n",
ifp->if_ipackets, ifp->if_opackets);
kprintf("\tNOF=%d, NOMB=%d, RXOF=%d, RXOL=%d, TXU=%d\n",
sc->rx_no_first, sc->rx_no_mbuf, sc->rx_overrunf,
sc->rx_overrunl, sc->tx_underrun);
#else
#ifdef DIAGNOSTIC
if_printf(ifp, "Status: %x (input buffer overflow)\n", status);
#else
IFNET_STAT_INC(ifp, ierrors, 1);
#endif
#endif
ep_if_init(sc);
return;
}
if (status & S_TX_COMPLETE) {
ifp->if_timer = 0;
/* we need ACK. we do it at the end */
/*
* We need to read TX_STATUS until we get a 0 status in order to
* turn off the interrupt flag.
*/
while ((status = inb(BASE + EP_W1_TX_STATUS)) & TXS_COMPLETE) {
if (status & TXS_SUCCES_INTR_REQ);
else if (status & (TXS_UNDERRUN | TXS_JABBER | TXS_MAX_COLLISION)) {
outw(BASE + EP_COMMAND, TX_RESET);
if (status & TXS_UNDERRUN) {
#ifdef EP_LOCAL_STATS
sc->tx_underrun++;
#endif
} else {
if (status & TXS_JABBER);
else /* TXS_MAX_COLLISION - we shouldn't get here */
IFNET_STAT_INC(ifp, collisions, 1);
}
IFNET_STAT_INC(ifp, oerrors, 1);
outw(BASE + EP_COMMAND, TX_ENABLE);
/*
* To have a tx_avail_int but giving the chance to the
* Reception
*/
if (!ifq_is_empty(&ifp->if_snd))
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8);
}
outb(BASE + EP_W1_TX_STATUS, 0x0); /* pops up the next
* status */
} /* while */
ifq_clr_oactive(&ifp->if_snd);
GO_WINDOW(1);
inw(BASE + EP_W1_FREE_TX);
if_devstart(ifp);
} /* end TX_COMPLETE */
}
outw(BASE + EP_COMMAND, C_INTR_LATCH); /* ACK int Latch */
if ((status = inw(BASE + EP_STATUS)) & S_5_INTS)
goto rescan;
/* re-enable Ints */
outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS);
}
static void
ep_if_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
{
struct ep_softc *sc = ifp->if_softc;
u_int len;
struct mbuf *m;
struct mbuf *top;
int pad;
ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
if (sc->gone) {
ifq_purge(&ifp->if_snd);
return;
}
while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
if (ifq_is_oactive(&ifp->if_snd)) {
return;
}
crit_enter();
startagain:
/* Sneak a peek at the next packet */
m = ifq_dequeue(&ifp->if_snd, NULL);
if (m == NULL) {
crit_exit();
return;
}
for (len = 0, top = m; m; m = m->m_next)
len += m->m_len;
m = top;
pad = padmap[len & 3];
/*
* The 3c509 automatically pads short packets to minimum ethernet length,
* but we drop packets that are too large. Perhaps we should truncate
* them instead?
*/
if (len + pad > ETHER_MAX_LEN) {
/* packet is obviously too large: toss it */
IFNET_STAT_INC(ifp, oerrors, 1);
m_freem(m);
goto readcheck;
}
if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) {
/* no room in FIFO */
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));
/* make sure */
if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) {
ifq_set_oactive(&ifp->if_snd);
ifq_prepend(&ifp->if_snd, top);
crit_exit();
return;
}
} else {
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | EP_THRESH_DISABLE);
}
outw(BASE + EP_W1_TX_PIO_WR_1, len);
outw(BASE + EP_W1_TX_PIO_WR_1, 0x0); /* Second dword meaningless */
if (EP_FTST(sc, F_ACCESS_32_BITS)) {
for (top = m; m != NULL; m = m->m_next) {
outsl(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t),
m->m_len / 4);
if (m->m_len & 3)
outsb(BASE + EP_W1_TX_PIO_WR_1,
mtod(m, caddr_t) + (m->m_len & (~3)),
m->m_len & 3);
}
} else {
for (top = m; m != NULL; m = m->m_next) {
outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2);
if (m->m_len & 1)
outb(BASE + EP_W1_TX_PIO_WR_1,
*(mtod(m, caddr_t) + m->m_len - 1));
}
}
while (pad--)
outb(BASE + EP_W1_TX_PIO_WR_1, 0); /* Padding */
BPF_MTAP(ifp, top);
ifp->if_timer = 2;
IFNET_STAT_INC(ifp, opackets, 1);
m_freem(top);
/*
* Is another packet coming in? We don't want to overflow the tiny RX
* fifo.
*/
readcheck:
if (inw(BASE + EP_W1_RX_STATUS) & RX_BYTES_MASK) {
/*
* we check if we have packets left, in that case we prepare to come
* back later
*/
if (!ifq_is_empty(&ifp->if_snd))
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8);
crit_exit();
return;
}
goto startagain;
}
