ue_intr.c,v

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head	1.2;
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1.2
date	97.09.21.19.26.10;	author dls;	state Dist;
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next	1.1;

1.1
date	94.08.04.20.19.17;	author dls;	state Orig;
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1.2
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@pre-3e code
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@/* ue_intr.c - ue_intr */

#include <conf.h>
#include <kernel.h>
#include <network.h>
#include <ue.h>

/*------------------------------------------------------------------------
 * ue_intr - handle an SMC Ultra Ethernet device interrupt
 *------------------------------------------------------------------------
 */
int
ue_intr()
{
	struct utdev	*pud;
	static int	next;
	struct ep	*pep;
	int		i;
	unsigned int	csr, intstat;

	pud = 0;
	for (i=0; i<Neth; ++i, ++next) {
		if (next >= Neth)
			next = 0;
		if (intstat = ue_hasintr(&ue[next])) {
			pud = &ue[next];
			break;
		}
	}
	if (pud == 0)
		return;
	csr = pud->ud_pdev->dvcsr;
	uewr(csr, W_INTMASK, 0);
	uewr(csr, INTSTAT, intstat);	/* clear the interrupt */
	if (intstat & INTSTAT_PTX)
		ue_xintr(pud, intstat & INTSTAT_TXE);
	if (intstat & INTSTAT_RXE)
		kprintf("receive error, rstat %x\n", uerd(csr, RSTAT));
	if (intstat & INTSTAT_TXE)
		kprintf("receive error, rstat %x\n", uerd(csr, TSTAT));
	uewr(csr, W_INTMASK, 0x7f);
	if (intstat & INTSTAT_PRX)
		ue_demux(pud);
}

/*------------------------------------------------------------------------
 * ue_hasintr - return true if this ue device has a pending interrupt
 *------------------------------------------------------------------------
 */
int
ue_hasintr(pud)
struct utdev	*pud;
{
	return uerd(pud->ud_pdev->dvcsr, INTSTAT);
}

/*------------------------------------------------------------------------
 * ue_xintr - handle a transmit interrupt on an SMC Ultra Ethernet
 *------------------------------------------------------------------------
 */
int
ue_xintr(pud, err)
struct utdev	*pud;
{
	if (err) {
kprintf("transmit error\n");
	}
	pud->ud_xpending--;
	if (lenq(pud->ud_outq))
		ue_wstrt(pud);
}
@


1.1
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@Initial revision
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@a34 2
	if (intstat & INTSTAT_PRX)
		ue_demux(pud, pud->ud_nextbuf);
d42 2
@