initial import of NetBSD tree

1 files changed, 1003 insertions, 0 deletions

diff --git a/sys/arch/sparc/dev/if_le.c b/sys/arch/sparc/dev/if_le.c
new file mode 100644
index 00000000000..fe422afe1ce
--- /dev/null
+++ b/sys/arch/sparc/dev/if_le.c
@@ -0,0 +1,1003 @@
+/*	$NetBSD: if_le.c,v 1.21 1995/06/23 13:19:44 pk Exp $ */
+
+/*-
+ * Copyright (c) 1982, 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)if_le.c	8.2 (Berkeley) 10/30/93
+ */
+
+#include "bpfilter.h"
+
+/*
+ * AMD 7990 LANCE
+ */
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/mbuf.h>
+#include <sys/buf.h>
+#include <sys/socket.h>
+#include <sys/syslog.h>
+#include <sys/ioctl.h>
+#include <sys/malloc.h>
+#include <sys/errno.h>
+
+#include <vm/vm.h>
+
+#include <net/if.h>
+#include <net/netisr.h>
+#include <net/route.h>
+#if NBPFILTER > 0
+#include <sys/select.h>
+#include <net/bpf.h>
+#include <net/bpfdesc.h>
+#endif
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#endif
+
+#ifdef NS
+#include <netns/ns.h>
+#include <netns/ns_if.h>
+#endif
+
+#ifdef APPLETALK
+#include <netddp/atalk.h>
+#endif
+
+#include <machine/autoconf.h>
+#include <machine/cpu.h>
+#include <machine/pmap.h>
+
+#include <sparc/dev/if_lereg.h>
+#include <sparc/dev/sbusvar.h>
+
+/* DVMA address to LANCE address -- the Sbus/MMU will resupply the 0xff */
+#define	LANCE_ADDR(x)	((int)(x) & ~0xff000000)
+
+int	ledebug = 0;		/* console error messages */
+
+#ifdef PACKETSTATS
+long	lexpacketsizes[LEMTU+1];
+long	lerpacketsizes[LEMTU+1];
+#endif
+
+/* Per interface statistics */
+/* XXX this should go in something like if_levar.h */
+struct	lestats {
+	long	lexints;	/* transmitter interrupts */
+	long	lerints;	/* receiver interrupts */
+	long	lerbufs;	/* total buffers received during interrupts */
+	long	lerhits;	/* times current rbuf was full */
+	long	lerscans;	/* rbufs scanned before finding first full */
+};
+
+/*
+ * Ethernet software status per interface.
+ *
+ * Each interface is referenced by a network interface structure,
+ * le_if, which the routing code uses to locate the interface.
+ * This structure contains the output queue for the interface, its address, ...
+ */
+struct le_softc {
+	struct	device sc_dev;		/* base device */
+	struct	sbusdev sc_sd;		/* sbus device */
+	struct	intrhand sc_ih;		/* interrupt vectoring */
+	struct	evcnt sc_intrcnt;	/* # of interrupts, per le */
+	struct	evcnt sc_errcnt;	/* # of errors, per le */
+
+	struct	arpcom sc_ac;		/* common Ethernet structures */
+#define	sc_if	sc_ac.ac_if		/* network-visible interface */
+#define	sc_addr	sc_ac.ac_enaddr		/* hardware Ethernet address */
+	volatile struct	lereg1 *sc_r1;	/* LANCE registers */
+	volatile struct	lereg2 *sc_r2;	/* dual-port RAM */
+	int	sc_rmd;			/* predicted next rmd to process */
+	int	sc_runt;
+	int	sc_jab;
+	int	sc_merr;
+	int	sc_babl;
+	int	sc_cerr;
+	int	sc_miss;
+	int	sc_xint;
+	int	sc_xown;
+	int	sc_uflo;
+	int	sc_rxlen;
+	int	sc_rxoff;
+	int	sc_txoff;
+	int	sc_busy;
+	short	sc_iflags;
+	struct	lestats sc_lestats;	/* per interface statistics */
+};
+
+
+/* autoconfiguration driver */
+void	leattach(struct device *, struct device *, void *);
+int	lematch(struct device *, void *, void *);
+struct	cfdriver lecd =
+    { NULL, "le", lematch, leattach, DV_IFNET, sizeof(struct le_softc) };
+
+/* Forwards */
+void	leattach(struct device *, struct device *, void *);
+void	lesetladrf(struct le_softc *);
+void	lereset(struct device *);
+int	leinit(int);
+void	lestart(struct ifnet *);
+int	leintr(void *);
+void	lexint(struct le_softc *);
+void	lerint(struct le_softc *);
+void	leread(struct le_softc *, char *, int);
+int	leput(char *, struct mbuf *);
+struct mbuf *leget(char *, int, int, struct ifnet *);
+int	leioctl(struct ifnet *, u_long, caddr_t);
+void	leerror(struct le_softc *, int);
+void	lererror(struct le_softc *, char *);
+void	lexerror(struct le_softc *);
+
+int
+lematch(parent, vcf, aux)
+	struct device *parent;
+	void *vcf, *aux;
+{
+	struct cfdata *cf = vcf;
+	register struct confargs *ca = aux;
+	register struct romaux *ra = &ca->ca_ra;
+
+	if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
+		return (0);
+	if (ca->ca_bustype == BUS_SBUS)
+		return (1);
+	ra->ra_len = NBPG;
+	return (probeget(ra->ra_vaddr, 2) != -1);
+}
+
+/*
+ * Interface exists: make available by filling in network interface
+ * record.  System will initialize the interface when it is ready
+ * to accept packets.
+ */
+void
+leattach(parent, self, args)
+	struct device *parent;
+	struct device *self;
+	void *args;
+{
+	register struct le_softc *sc = (struct le_softc *)self;
+	register struct confargs *ca = args;
+	register volatile struct lereg2 *ler2;
+	struct ifnet *ifp = &sc->sc_if;
+	register struct bootpath *bp;
+	register int a, pri;
+
+	/* XXX the following declarations should be elsewhere */
+	extern void myetheraddr(u_char *);
+	extern caddr_t dvma_malloc(size_t);
+
+	if (ca->ca_ra.ra_nintr != 1) {
+		printf(": expected 1 interrupt, got %d\n", ca->ca_ra.ra_nintr);
+		return;
+	}
+	pri = ca->ca_ra.ra_intr[0].int_pri;
+	printf(" pri %d", pri);
+	sc->sc_r1 = (volatile struct lereg1 *)
+	    mapiodev(ca->ca_ra.ra_paddr, sizeof(struct lereg1), ca->ca_bustype);
+	ler2 = sc->sc_r2 = (volatile struct lereg2 *)
+	    dvma_malloc(sizeof(struct lereg2));
+
+	myetheraddr(sc->sc_addr);
+	printf(": hardware address %s\n", ether_sprintf(sc->sc_addr));
+
+	/*
+	 * Setup for transmit/receive
+	 *
+	 * According to Van, some versions of the Lance only use this
+	 * address to receive packets; it doesn't put them in
+	 * output packets. We'll want to make sure that lestart()
+	 * installs the address.
+	 */
+	ler2->ler2_padr[0] = sc->sc_addr[1];
+	ler2->ler2_padr[1] = sc->sc_addr[0];
+	ler2->ler2_padr[2] = sc->sc_addr[3];
+	ler2->ler2_padr[3] = sc->sc_addr[2];
+	ler2->ler2_padr[4] = sc->sc_addr[5];
+	ler2->ler2_padr[5] = sc->sc_addr[4];
+	a = LANCE_ADDR(&ler2->ler2_rmd);
+	ler2->ler2_rlen = LE_RLEN | (a >> 16);
+	ler2->ler2_rdra = a;
+	a = LANCE_ADDR(&ler2->ler2_tmd);
+	ler2->ler2_tlen = LE_TLEN | (a >> 16);
+	ler2->ler2_tdra = a;
+
+	/*
+	 * Link into sbus, and establish interrupt handler.
+	 */
+	sc->sc_sd.sd_reset = lereset;
+#if defined(SUN4C) || defined(SUN4M)
+	if (ca->ca_bustype==BUS_SBUS)
+		sbus_establish(&sc->sc_sd, &sc->sc_dev);
+#endif /* SUN4C || SUN4M */
+
+	sc->sc_ih.ih_fun = leintr;
+	sc->sc_ih.ih_arg = sc;
+	intr_establish(pri, &sc->sc_ih);
+
+	/*
+	 * Set up event counters.
+	 */
+	evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt);
+	evcnt_attach(&sc->sc_dev, "errs", &sc->sc_errcnt);
+
+	ifp->if_unit = sc->sc_dev.dv_unit;
+	ifp->if_name = "le";
+	ifp->if_ioctl = leioctl;
+	ifp->if_start = lestart;
+	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+#ifdef IFF_NOTRAILERS
+	/* XXX still compile when the blasted things are gone... */
+	ifp->if_flags |= IFF_NOTRAILERS;
+#endif
+#if NBPFILTER > 0
+	bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
+#endif
+	if_attach(ifp);
+	ether_ifattach(ifp);
+
+#define SAME_LANCE(bp, ca) \
+	((bp->val[0] == ca->ca_slot && bp->val[1] == ca->ca_offset) || \
+	 (bp->val[0] == -1 && bp->val[1] == sc->sc_dev.dv_unit))
+
+	bp = ca->ca_ra.ra_bp;
+	switch (ca->ca_bustype) {
+	case BUS_SBUS:
+		if (bp != NULL && strcmp(bp->name, "le") == 0 &&
+		    SAME_LANCE(bp, ca))
+			bootdv = &sc->sc_dev;
+		break;
+	default:
+		if (bp != NULL && strcmp(bp->name, "le") == 0 &&
+		    sc->sc_dev.dv_unit == bp->val[1])
+			bootdv = &sc->sc_dev;
+		break;
+	}
+}
+
+/*
+ * Setup the logical address filter
+ */
+void
+lesetladrf(sc)
+	register struct le_softc *sc;
+{
+	register volatile struct lereg2 *ler2 = sc->sc_r2;
+	register struct ifnet *ifp = &sc->sc_if;
+	register struct ether_multi *enm;
+	register u_char *cp, c;
+	register u_long crc;
+	register int i, len;
+	struct ether_multistep step;
+
+	/*
+	 * Set up multicast address filter by passing all multicast
+	 * addresses through a crc generator, and then using the high
+	 * order 6 bits as a index into the 64 bit logical address
+	 * filter. The high order two bits select the word, while the
+	 * rest of the bits select the bit within the word.
+	 */
+
+	ler2->ler2_ladrf[0] = 0;
+	ler2->ler2_ladrf[1] = 0;
+	ler2->ler2_ladrf[2] = 0;
+	ler2->ler2_ladrf[3] = 0;
+	ifp->if_flags &= ~IFF_ALLMULTI;
+	ETHER_FIRST_MULTI(step, &sc->sc_ac, enm);
+	while (enm != NULL) {
+		if (bcmp((caddr_t)&enm->enm_addrlo,
+		    (caddr_t)&enm->enm_addrhi, sizeof(enm->enm_addrlo)) != 0) {
+			/*
+			 * We must listen to a range of multicast
+			 * addresses. For now, just accept all
+			 * multicasts, rather than trying to set only
+			 * those filter bits needed to match the range.
+			 * (At this time, the only use of address
+			 * ranges is for IP multicast routing, for
+			 * which the range is big enough to require all
+			 * bits set.)
+			 */
+			ler2->ler2_ladrf[0] = 0xffff;
+			ler2->ler2_ladrf[1] = 0xffff;
+			ler2->ler2_ladrf[2] = 0xffff;
+			ler2->ler2_ladrf[3] = 0xffff;
+			ifp->if_flags |= IFF_ALLMULTI;
+			return;
+		}
+
+		/*
+		 * One would think, given the AM7990 document's polynomial
+		 * of 0x04c11db6, that this should be 0x6db88320 (the bit
+		 * reversal of the AMD value), but that is not right.  See
+		 * the BASIC listing: bit 0 (our bit 31) must then be set.
+		 */
+		cp = (unsigned char *)&enm->enm_addrlo;
+		crc = 0xffffffff;
+		for (len = 6; --len >= 0;) {
+			c = *cp++;
+			for (i = 0; i < 8; i++) {
+				if ((c & 0x01) ^ (crc & 0x01)) {
+					crc >>= 1;
+					crc = crc ^ 0xedb88320;
+				} else
+					crc >>= 1;
+				c >>= 1;
+			}
+		}
+		/* Just want the 6 most significant bits. */
+		crc = crc >> 26;
+
+		/* Turn on the corresponding bit in the filter. */
+		ler2->ler2_ladrf[crc >> 4] |= 1 << (crc & 0xf);
+
+		ETHER_NEXT_MULTI(step, enm);
+	}
+}
+
+void
+lereset(dev)
+	struct device *dev;
+{
+	register struct le_softc *sc = (struct le_softc *)dev;
+	register volatile struct lereg1 *ler1 = sc->sc_r1;
+	register volatile struct lereg2 *ler2 = sc->sc_r2;
+	register int i, a, timo, stat;
+
+#if NBPFILTER > 0
+	if (sc->sc_if.if_flags & IFF_PROMISC)
+		ler2->ler2_mode = LE_MODE_NORMAL | LE_MODE_PROM;
+	else
+#endif
+		ler2->ler2_mode = LE_MODE_NORMAL;
+	ler1->ler1_rap = LE_CSR0;
+	ler1->ler1_rdp = LE_C0_STOP;
+
+	/* Setup the logical address filter */
+	lesetladrf(sc);
+
+	/* init receive and transmit rings */
+	for (i = 0; i < LERBUF; i++) {
+		a = LANCE_ADDR(&ler2->ler2_rbuf[i][0]);
+		ler2->ler2_rmd[i].rmd0 = a;
+		ler2->ler2_rmd[i].rmd1_hadr = a >> 16;
+		ler2->ler2_rmd[i].rmd1_bits = LE_R1_OWN;
+		ler2->ler2_rmd[i].rmd2 = -LEMTU | LE_XMD2_ONES;
+		ler2->ler2_rmd[i].rmd3 = 0;
+	}
+	for (i = 0; i < LETBUF; i++) {
+		a = LANCE_ADDR(&ler2->ler2_tbuf[i][0]);
+		ler2->ler2_tmd[i].tmd0 = a;
+		ler2->ler2_tmd[i].tmd1_hadr = a >> 16;
+		ler2->ler2_tmd[i].tmd1_bits = 0;
+		ler2->ler2_tmd[i].tmd2 = LE_XMD2_ONES;
+		ler2->ler2_tmd[i].tmd3 = 0;
+	}
+
+bzero(&ler2->ler2_rbuf[0][0], (LERBUF + LETBUF) * LEMTU);
+	/* lance will stuff packet into receive buffer 0 next */
+	sc->sc_rmd = 0;
+
+	/* tell the chip where to find the initialization block */
+	a = LANCE_ADDR(&ler2->ler2_mode);
+	ler1->ler1_rap = LE_CSR1;
+	ler1->ler1_rdp = a;
+	ler1->ler1_rap = LE_CSR2;
+	ler1->ler1_rdp = a >> 16;
+	ler1->ler1_rap = LE_CSR3;
+	ler1->ler1_rdp = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
+	ler1->ler1_rap = LE_CSR0;
+	ler1->ler1_rdp = LE_C0_INIT;
+	timo = 100000;
+	while (((stat = ler1->ler1_rdp) & (LE_C0_ERR | LE_C0_IDON)) == 0) {
+		if (--timo == 0) {
+			printf("%s: init timeout, stat=%b\n",
+			    sc->sc_dev.dv_xname, stat, LE_C0_BITS);
+			break;
+		}
+	}
+	if (stat & LE_C0_ERR)
+		printf("%s: init failed, stat=%b\n",
+		    sc->sc_dev.dv_xname, stat, LE_C0_BITS);
+	else
+		ler1->ler1_rdp = LE_C0_IDON;	/* clear IDON */
+	ler1->ler1_rdp = LE_C0_STRT | LE_C0_INEA;
+	sc->sc_if.if_flags &= ~IFF_OACTIVE;
+}
+
+/*
+ * Initialization of interface
+ */
+int
+leinit(unit)
+	int unit;
+{
+	register struct le_softc *sc = lecd.cd_devs[unit];
+	register struct ifnet *ifp = &sc->sc_if;
+	register int s;
+
+	/* not yet, if address still unknown */
+	if ((ifp->if_flags & IFF_RUNNING) == 0) {
+		s = splimp();
+		ifp->if_flags |= IFF_RUNNING;
+		lereset(&sc->sc_dev);
+		lestart(ifp);
+		splx(s);
+	}
+	return (0);
+}
+
+/*
+ * Start output on interface.  Get another datagram to send
+ * off of the interface queue, and copy it to the interface
+ * before starting the output.
+ */
+void
+lestart(ifp)
+	register struct ifnet *ifp;
+{
+	register struct le_softc *sc = lecd.cd_devs[ifp->if_unit];
+	register volatile struct letmd *tmd;
+	register struct mbuf *m;
+	register int len;
+
+	if ((sc->sc_if.if_flags & IFF_RUNNING) == 0)
+		return;
+	IF_DEQUEUE(&sc->sc_if.if_snd, m);
+	if (m == 0)
+		return;
+	len = leput(sc->sc_r2->ler2_tbuf[0], m);
+#if NBPFILTER > 0
+	/*
+	 * If bpf is listening on this interface, let it
+	 * see the packet before we commit it to the wire.
+	 */
+	if (sc->sc_if.if_bpf)
+		bpf_tap(sc->sc_if.if_bpf, sc->sc_r2->ler2_tbuf[0], len);
+#endif
+
+#ifdef PACKETSTATS
+	if (len <= LEMTU)
+		lexpacketsizes[len]++;
+#endif
+	tmd = sc->sc_r2->ler2_tmd;
+	tmd->tmd3 = 0;
+	tmd->tmd2 = -len | LE_XMD2_ONES;
+	tmd->tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
+	sc->sc_if.if_flags |= IFF_OACTIVE;
+	return;
+}
+
+int
+leintr(dev)
+	register void *dev;
+{
+	register struct le_softc *sc = dev;
+	register volatile struct lereg1 *ler1 = sc->sc_r1;
+	register int csr0;
+
+	csr0 = ler1->ler1_rdp;
+	if ((csr0 & LE_C0_INTR) == 0)
+		return (0);
+	sc->sc_intrcnt.ev_count++;
+
+	if (csr0 & LE_C0_ERR) {
+		sc->sc_errcnt.ev_count++;
+		leerror(sc, csr0);
+		if (csr0 & LE_C0_MERR) {
+			sc->sc_merr++;
+			lereset(&sc->sc_dev);
+			return (1);
+		}
+		if (csr0 & LE_C0_BABL)
+			sc->sc_babl++;
+		if (csr0 & LE_C0_CERR)
+			sc->sc_cerr++;
+		if (csr0 & LE_C0_MISS)
+			sc->sc_miss++;
+		ler1->ler1_rdp = LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_INEA;
+	}
+	if ((csr0 & LE_C0_RXON) == 0) {
+		sc->sc_rxoff++;
+		lereset(&sc->sc_dev);
+		return (1);
+	}
+	if ((csr0 & LE_C0_TXON) == 0) {
+		sc->sc_txoff++;
+		lereset(&sc->sc_dev);
+		return (1);
+	}
+	if (csr0 & LE_C0_RINT) {
+		/* interrupt is cleared in lerint */
+		lerint(sc);
+	}
+	if (csr0 & LE_C0_TINT) {
+		ler1->ler1_rdp = LE_C0_TINT|LE_C0_INEA;
+		lexint(sc);
+	}
+	return (1);
+}
+
+/*
+ * Ethernet interface transmitter interrupt.
+ * Start another output if more data to send.
+ */
+void
+lexint(sc)
+	register struct le_softc *sc;
+{
+	register volatile struct letmd *tmd = sc->sc_r2->ler2_tmd;
+
+	sc->sc_lestats.lexints++;
+	if ((sc->sc_if.if_flags & IFF_OACTIVE) == 0) {
+		sc->sc_xint++;
+		return;
+	}
+	if (tmd->tmd1_bits & LE_T1_OWN) {
+		sc->sc_xown++;
+		return;
+	}
+	if (tmd->tmd1_bits & LE_T1_ERR) {
+err:
+		lexerror(sc);
+		sc->sc_if.if_oerrors++;
+		if (tmd->tmd3 & (LE_T3_BUFF|LE_T3_UFLO)) {
+			sc->sc_uflo++;
+			lereset(&sc->sc_dev);
+		} else if (tmd->tmd3 & LE_T3_LCOL)
+			sc->sc_if.if_collisions++;
+		else if (tmd->tmd3 & LE_T3_RTRY)
+			sc->sc_if.if_collisions += 16;
+	}
+	else if (tmd->tmd3 & LE_T3_BUFF)
+		/* XXX documentation says BUFF not included in ERR */
+		goto err;
+	else if (tmd->tmd1_bits & LE_T1_ONE)
+		sc->sc_if.if_collisions++;
+	else if (tmd->tmd1_bits & LE_T1_MORE)
+		/* what is the real number? */
+		sc->sc_if.if_collisions += 2;
+	else
+		sc->sc_if.if_opackets++;
+	sc->sc_if.if_flags &= ~IFF_OACTIVE;
+	lestart(&sc->sc_if);
+}
+
+#define	LENEXTRMP \
+	if (++bix == LERBUF) bix = 0, rmd = sc->sc_r2->ler2_rmd; else ++rmd
+
+/*
+ * Ethernet interface receiver interrupt.
+ * If input error just drop packet.
+ * Decapsulate packet based on type and pass to type specific
+ * higher-level input routine.
+ */
+void
+lerint(sc)
+	register struct le_softc *sc;
+{
+	register int bix = sc->sc_rmd;
+	register volatile struct lermd *rmd = &sc->sc_r2->ler2_rmd[bix];
+
+	sc->sc_lestats.lerints++;
+	/*
+	 * Out of sync with hardware, should never happen?
+	 */
+	if (rmd->rmd1_bits & LE_R1_OWN) {
+		do {
+			sc->sc_lestats.lerscans++;
+			LENEXTRMP;
+		} while ((rmd->rmd1_bits & LE_R1_OWN) && bix != sc->sc_rmd);
+		if (bix == sc->sc_rmd)
+			printf("%s: RINT with no buffer\n",
+			    sc->sc_dev.dv_xname);
+	} else
+		sc->sc_lestats.lerhits++;
+
+	/*
+	 * Process all buffers with valid data
+	 */
+	while ((rmd->rmd1_bits & LE_R1_OWN) == 0) {
+		int len = rmd->rmd3;
+
+		/* Clear interrupt to avoid race condition */
+		sc->sc_r1->ler1_rdp = LE_C0_RINT|LE_C0_INEA;
+
+		if (rmd->rmd1_bits & LE_R1_ERR) {
+			sc->sc_rmd = bix;
+			lererror(sc, "bad packet");
+			sc->sc_if.if_ierrors++;
+		} else if ((rmd->rmd1_bits & (LE_R1_STP|LE_R1_ENP)) !=
+		    (LE_R1_STP|LE_R1_ENP)) {
+			/* XXX make a define for LE_R1_STP|LE_R1_ENP? */
+			/*
+			 * Find the end of the packet so we can see how long
+			 * it was.  We still throw it away.
+			 */
+			do {
+				sc->sc_r1->ler1_rdp = LE_C0_RINT|LE_C0_INEA;
+				rmd->rmd3 = 0;
+				rmd->rmd1_bits = LE_R1_OWN;
+				LENEXTRMP;
+			} while (!(rmd->rmd1_bits &
+			    (LE_R1_OWN|LE_R1_ERR|LE_R1_STP|LE_R1_ENP)));
+			sc->sc_rmd = bix;
+			lererror(sc, "chained buffer");
+			sc->sc_rxlen++;
+			/*
+			 * If search terminated without successful completion
+			 * we reset the hardware (conservative).
+			 */
+			if ((rmd->rmd1_bits &
+			    (LE_R1_OWN|LE_R1_ERR|LE_R1_STP|LE_R1_ENP)) !=
+			    LE_R1_ENP) {
+				lereset(&sc->sc_dev);
+				return;
+			}
+		} else {
+			leread(sc, sc->sc_r2->ler2_rbuf[bix], len);
+#ifdef PACKETSTATS
+			lerpacketsizes[len]++;
+#endif
+			sc->sc_lestats.lerbufs++;
+		}
+		rmd->rmd3 = 0;
+		rmd->rmd1_bits = LE_R1_OWN;
+		LENEXTRMP;
+	}
+	sc->sc_rmd = bix;
+}
+
+void
+leread(sc, pkt, len)
+	register struct le_softc *sc;
+	char *pkt;
+	int len;
+{
+	register struct ether_header *et;
+	register struct ifnet *ifp = &sc->sc_if;
+	struct mbuf *m;
+	struct ifqueue *inq;
+	int flags;
+
+	ifp->if_ipackets++;
+	et = (struct ether_header *)pkt;
+	et->ether_type = ntohs((u_short)et->ether_type);
+	/* adjust input length to account for header and CRC */
+	len -= sizeof(struct ether_header) + 4;
+
+	if (len <= 0) {
+		if (ledebug)
+			log(LOG_WARNING,
+			    "%s: ierror(runt packet): from %s: len=%d\n",
+			    sc->sc_dev.dv_xname,
+			    ether_sprintf(et->ether_shost), len);
+		sc->sc_runt++;
+		ifp->if_ierrors++;
+		return;
+	}
+
+	/* Setup mbuf flags we'll need later */
+	flags = 0;
+	if (bcmp((caddr_t)etherbroadcastaddr,
+	    (caddr_t)et->ether_dhost, sizeof(etherbroadcastaddr)) == 0)
+		flags |= M_BCAST;
+	if (et->ether_dhost[0] & 1)
+		flags |= M_MCAST;
+
+#if NBPFILTER > 0
+	/*
+	 * Check if there's a bpf filter listening on this interface.
+	 * If so, hand off the raw packet to enet, then discard things
+	 * not destined for us (but be sure to keep broadcast/multicast).
+	 */
+	if (sc->sc_if.if_bpf) {
+		bpf_tap(sc->sc_if.if_bpf, pkt,
+		    len + sizeof(struct ether_header));
+		if ((flags & (M_BCAST | M_MCAST)) == 0 &&
+		    bcmp(et->ether_dhost, sc->sc_addr,
+			    sizeof(et->ether_dhost)) != 0)
+			return;
+	}
+#endif
+	m = leget(pkt, len, 0, ifp);
+	if (m == 0)
+		return;
+	ether_input(ifp, et, m);
+}
+
+/*
+ * Routine to copy from mbuf chain to transmit
+ * buffer in board local memory.
+ *
+ * ### this can be done by remapping in some cases
+ */
+int
+leput(lebuf, m)
+	register char *lebuf;
+	register struct mbuf *m;
+{
+	register struct mbuf *mp;
+	register int len, tlen = 0;
+
+	for (mp = m; mp; mp = mp->m_next) {
+		len = mp->m_len;
+		if (len == 0)
+			continue;
+		tlen += len;
+		bcopy(mtod(mp, char *), lebuf, len);
+		lebuf += len;
+	}
+	m_freem(m);
+	if (tlen < LEMINSIZE) {
+		bzero(lebuf, LEMINSIZE - tlen);
+		tlen = LEMINSIZE;
+	}
+	return (tlen);
+}
+
+/*
+ * Routine to copy from board local memory into mbufs.
+ */
+struct mbuf *
+leget(lebuf, totlen, off0, ifp)
+	char *lebuf;
+	int totlen, off0;
+	struct ifnet *ifp;
+{
+	register struct mbuf *m;
+	struct mbuf *top = 0, **mp = &top;
+	register int off = off0, len;
+	register char *cp;
+	char *epkt;
+
+	lebuf += sizeof(struct ether_header);
+	cp = lebuf;
+	epkt = cp + totlen;
+	if (off) {
+		cp += off + 2 * sizeof(u_short);
+		totlen -= 2 * sizeof(u_short);
+	}
+
+	MGETHDR(m, M_DONTWAIT, MT_DATA);
+	if (m == 0)
+		return (0);
+	m->m_pkthdr.rcvif = ifp;
+	m->m_pkthdr.len = totlen;
+	m->m_len = MHLEN;
+
+	while (totlen > 0) {
+		if (top) {
+			MGET(m, M_DONTWAIT, MT_DATA);
+			if (m == 0) {
+				m_freem(top);
+				return (0);
+			}
+			m->m_len = MLEN;
+		}
+		len = min(totlen, epkt - cp);
+		if (len >= MINCLSIZE) {
+			MCLGET(m, M_DONTWAIT);
+			if (m->m_flags & M_EXT)
+				m->m_len = len = min(len, MCLBYTES);
+			else
+				len = m->m_len;
+		} else {
+			/*
+			 * Place initial small packet/header at end of mbuf.
+			 */
+			if (len < m->m_len) {
+				if (top == 0 && len + max_linkhdr <= m->m_len)
+					m->m_data += max_linkhdr;
+				m->m_len = len;
+			} else
+				len = m->m_len;
+		}
+		bcopy(cp, mtod(m, caddr_t), (unsigned)len);
+		cp += len;
+		*mp = m;
+		mp = &m->m_next;
+		totlen -= len;
+		if (cp == epkt)
+			cp = lebuf;
+	}
+	return (top);
+}
+
+/*
+ * Process an ioctl request.
+ */
+int
+leioctl(ifp, cmd, data)
+	register struct ifnet *ifp;
+	u_long cmd;
+	caddr_t data;
+{
+	register struct ifaddr *ifa;
+	register struct le_softc *sc = lecd.cd_devs[ifp->if_unit];
+	register volatile struct lereg1 *ler1;
+	int s = splimp(), error = 0;
+
+	switch (cmd) {
+
+	case SIOCSIFADDR:
+		ifa = (struct ifaddr *)data;
+		ifp->if_flags |= IFF_UP;
+		switch (ifa->ifa_addr->sa_family) {
+#ifdef INET
+		case AF_INET:
+			(void)leinit(ifp->if_unit);
+			arp_ifinit(&sc->sc_ac, ifa);
+			break;
+#endif
+#ifdef NS
+		case AF_NS:
+		    {
+			register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
+
+			if (ns_nullhost(*ina))
+				ina->x_host = *(union ns_host *)(sc->sc_addr);
+			else {
+				/*
+				 * The manual says we can't change the address
+				 * while the receiver is armed,
+				 * so reset everything
+				 */
+				ifp->if_flags &= ~IFF_RUNNING;
+				bcopy((caddr_t)ina->x_host.c_host,
+				    (caddr_t)sc->sc_addr, sizeof(sc->sc_addr));
+			}
+			(void)leinit(ifp->if_unit);	/* does le_setaddr() */
+			break;
+		    }
+#endif
+		default:
+			(void)leinit(ifp->if_unit);
+			break;
+		}
+		break;
+
+	case SIOCSIFFLAGS:
+		ler1 = sc->sc_r1;
+		if ((ifp->if_flags & IFF_UP) == 0 &&
+		    ifp->if_flags & IFF_RUNNING) {
+			ler1->ler1_rdp = LE_C0_STOP;
+			ifp->if_flags &= ~IFF_RUNNING;
+		} else if (ifp->if_flags & IFF_UP &&
+		    (ifp->if_flags & IFF_RUNNING) == 0)
+			(void)leinit(ifp->if_unit);
+		/*
+		 * If the state of the promiscuous bit changes, the interface
+		 * must be reset to effect the change.
+		 */
+		if (((ifp->if_flags ^ sc->sc_iflags) & IFF_PROMISC) &&
+		    (ifp->if_flags & IFF_RUNNING)) {
+			sc->sc_iflags = ifp->if_flags;
+			lereset(&sc->sc_dev);
+			lestart(ifp);
+		}
+		break;
+
+	case SIOCADDMULTI:
+		error = ether_addmulti((struct ifreq *)data, &sc->sc_ac);
+		goto update_multicast;
+
+	case SIOCDELMULTI:
+		error = ether_delmulti((struct ifreq *)data, &sc->sc_ac);
+	update_multicast:
+		if (error == ENETRESET) {
+			/*
+			 * Multicast list has changed; set the hardware
+			 * filter accordingly.
+			 */
+			lereset(&sc->sc_dev);
+			error = 0;
+		}
+		break;
+
+	default:
+		error = EINVAL;
+	}
+	splx(s);
+	return (error);
+}
+
+void
+leerror(sc, stat)
+	register struct le_softc *sc;
+	int stat;
+{
+	if (!ledebug)
+		return;
+
+	/*
+	 * Not all transceivers implement heartbeat
+	 * so we only log CERR once.
+	 */
+	if ((stat & LE_C0_CERR) && sc->sc_cerr)
+		return;
+	log(LOG_WARNING, "%s: error: stat=%b\n",
+	    sc->sc_dev.dv_xname, stat, LE_C0_BITS);
+}
+
+void
+lererror(sc, msg)
+	register struct le_softc *sc;
+	char *msg;
+{
+	register volatile struct lermd *rmd;
+	int len;
+
+	if (!ledebug)
+		return;
+
+	rmd = &sc->sc_r2->ler2_rmd[sc->sc_rmd];
+	len = rmd->rmd3;
+	log(LOG_WARNING, "%s: ierror(%s): from %s: buf=%d, len=%d, rmd1=%b\n",
+	    sc->sc_dev.dv_xname, msg, len > 11 ?
+	    ether_sprintf((u_char *)&sc->sc_r2->ler2_rbuf[sc->sc_rmd][6]) :
+	    "unknown",
+	    sc->sc_rmd, len, rmd->rmd1_bits, LE_R1_BITS);
+}
+
+void
+lexerror(sc)
+	register struct le_softc *sc;
+{
+	register volatile struct letmd *tmd;
+	register int len, tmd3, tdr;
+
+	if (!ledebug)
+		return;
+
+	tmd = sc->sc_r2->ler2_tmd;
+	tmd3 = tmd->tmd3;
+	tdr = tmd3 & LE_T3_TDR_MASK;
+	len = -(tmd->tmd2 & ~LE_XMD2_ONES);
+	log(LOG_WARNING,
+    "%s: oerror: to %s: buf=%d, len=%d, tmd1=%b, tmd3=%b, tdr=%d (%d nsecs)\n",
+	    sc->sc_dev.dv_xname, len > 5 ?
+	    ether_sprintf((u_char *)&sc->sc_r2->ler2_tbuf[0][0]) : "unknown",
+	    0, len,
+	    tmd->tmd1_bits, LE_T1_BITS,
+	    tmd3, LE_T3_BITS, tdr, tdr * 100);
+}