static void
w_timer(void* arg)
{
Ether* ether = (Ether*) arg;
Ctlr* ctlr = (Ctlr*)ether->ctlr;
ctlr->timerproc = up;
for(;;) {
tsleep(&up->sleep, return0, 0, MSperTick);
ctlr = (Ctlr*)ether->ctlr;
if(ctlr == 0)
break;
if((ctlr->state & (Attached|Power)) != (Attached|Power))
continue;
ctlr->ticks++;
ilock(ctlr);
// Seems that the card gets frames BUT does
// not send the interrupt; this is a problem because
// I suspect it runs out of receive buffers and
// stops receiving until a transmit watchdog
// reenables the card.
// The problem is serious because it leads to
// poor rtts.
// This can be seen clearly by commenting out
// the next if and doing a ping: it will stop
// receiving (although the icmp replies are being
// issued from the remote) after a few seconds.
// Of course this `bug' could be because I'm reading
// the card frames in the wrong way; due to the
// lack of documentation I cannot know.
if(csr_ins(ctlr, WR_EvSts)&WEvs) {
ctlr->tickintr++;
w_intr(ether);
}
if((ctlr->ticks % 10) == 0) {
if(ctlr->txtmout && --ctlr->txtmout == 0) {
ctlr->nwatchdogs++;
w_txdone(ctlr, WTxErrEv);
if(w_enable(ether)) {
DEBUG("wavelan: wdog enable failed\n");
}
w_txstart(ether);
}
if((ctlr->ticks % 120) == 0)
if(ctlr->txbusy == 0)
w_cmd(ctlr, WCmdEnquire, WTyp_Stats);
if(ctlr->scanticks > 0)
if((ctlr->ticks % ctlr->scanticks) == 0)
if(ctlr->txbusy == 0)
w_cmd(ctlr, WCmdEnquire, WTyp_Scan);
}
iunlock(ctlr);
}
pexit("terminated", 0);
}
void
w_interrupt(Ureg* ,void* arg)
{
Ether* ether = (Ether*) arg;
Ctlr* ctlr = (Ctlr*) ether->ctlr;
if(ctlr == 0)
return;
ilock(ctlr);
ctlr->nints++;
w_intr(ether);
iunlock(ctlr);
}
