LanMedias driver sources for the LMC1000 and similar cards.

Does not yet compile yet.

1 files changed, 1396 insertions, 0 deletions

diff --git a/sys/dev/lmc/if_lmc.c b/sys/dev/lmc/if_lmc.c
new file mode 100644
index 0000000..0753c72
--- /dev/null
+++ b/sys/dev/lmc/if_lmc.c
@@ -0,0 +1,1396 @@
+/*	$FreeBSD$ */
+/*      From NetBSD: if_de.c,v 1.56.2.1 1997/10/27 02:13:25 thorpej Exp    */
+/*	$Id: if_lmc.c,v 1.9 1999/02/19 15:08:42 explorer Exp $	*/
+
+/*-
+ * Copyright (c) 1994-1997 Matt Thomas (matt@3am-software.com)
+ * Copyright (c) LAN Media Corporation 1998, 1999.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+char lmc_version[] = "BSD 1.1";
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/proc.h>	/* only for declaration of wakeup() used by vm.h */
+#if defined(__FreeBSD__)
+#include <machine/clock.h>
+#elif defined(__bsdi__) || defined(__NetBSD__)
+#include <sys/device.h>
+#endif
+
+#if defined(__NetBSD__)
+#include <dev/pci/pcidevs.h>
+#include "rnd.h"
+#if NRND > 0
+#include <sys/rnd.h>
+#endif
+#endif
+
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/if_dl.h>
+#include <net/netisr.h>
+
+#include "bpfilter.h"
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#include <net/bpfdesc.h>
+#endif
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+#include <vm/vm_kern.h>
+
+#if defined(__FreeBSD__) || defined(__NetBSD__)
+#include <net/if_sppp.h>
+#endif
+
+#if defined(__bsdi__)
+#if INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#endif
+
+#include <net/netisr.h>
+#include <net/if.h>
+#include <net/netisr.h>
+#include <net/if_types.h>
+#include <net/if_p2p.h>
+#include <net/if_c_hdlc.h>
+#endif
+
+#if defined(__FreeBSD__)
+#include <vm/pmap.h>
+#include <pci.h>
+#if NPCI > 0
+#include <pci/pcivar.h>
+#include <pci/dc21040reg.h>
+#define INCLUDE_PATH_PREFIX "pci/"
+#endif
+#endif /* __FreeBSD__ */
+
+#if defined(__bsdi__)
+#include <i386/pci/ic/dc21040.h>
+#include <i386/isa/isa.h>
+#include <i386/isa/icu.h>
+#include <i386/isa/dma.h>
+#include <i386/isa/isavar.h>
+#include <i386/pci/pci.h>
+
+#define	INCLUDE_PATH_PREFIX	"i386/pci/"
+#endif /* __bsdi__ */
+
+#if defined(__NetBSD__)
+#include <machine/bus.h>
+#if defined(__alpha__)
+#include <machine/intr.h>
+#endif
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/ic/dc21040reg.h>
+#define	INCLUDE_PATH_PREFIX	"dev/pci/"
+#endif /* __NetBSD__ */
+
+/*
+ * Intel CPUs should use I/O mapped access.  XXXMLG Is this true on NetBSD
+ * too?
+ */
+#if defined(__i386__)
+#define	LMC_IOMAPPED
+#endif
+
+/*
+ * This turns on all sort of debugging stuff and make the
+ * driver much larger.
+ */
+#if 0
+#define LMC_DEBUG
+#define DP(x)	printf x
+#else
+#define DP(x)
+#endif
+
+#define	LMC_HZ	10
+
+#ifndef TULIP_GP_PINSET
+#define TULIP_GP_PINSET			0x00000100L
+#endif
+#ifndef TULIP_BUSMODE_READMULTIPLE
+#define TULIP_BUSMODE_READMULTIPLE	0x00200000L
+#endif
+
+/*
+ * C sucks
+ */
+typedef struct lmc___softc lmc_softc_t;
+typedef struct lmc___media lmc_media_t;
+typedef struct lmc___ctl lmc_ctl_t;
+
+/*
+ * Sigh.  Every OS puts these in different places.  NetBSD and FreeBSD use
+ * a C preprocessor that allows this hack, but BSDI does not.
+ */
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+#include INCLUDE_PATH_PREFIX "if_lmcioctl.h"
+#include INCLUDE_PATH_PREFIX "if_lmcvar.h"
+#include INCLUDE_PATH_PREFIX "if_lmc_common.c"
+#include INCLUDE_PATH_PREFIX "if_lmc_media.c"
+#else /* BSDI */
+#include "i386/pci/if_lmcioctl.h"
+#include "i386/pci/if_lmcvar.h"
+#include "i386/pci/if_lmc_common.c"
+#include "i386/pci/if_lmc_media.c"
+#endif
+
+/*
+ * This module supports
+ *	the DEC 21140A pass 2.2 PCI Fast Ethernet Controller.
+ */
+static lmc_intrfunc_t lmc_intr_normal(void *);
+static ifnet_ret_t lmc_ifstart_one(struct ifnet *ifp);
+static ifnet_ret_t lmc_ifstart(struct ifnet *ifp);
+static struct mbuf *lmc_txput(lmc_softc_t * const sc, struct mbuf *m);
+static void lmc_rx_intr(lmc_softc_t * const sc);
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+static void lmc_watchdog(struct ifnet *ifp);
+#endif
+#if defined(__bsdi__)
+static int lmc_watchdog(int);
+#endif
+static void lmc_ifup(lmc_softc_t * const sc);
+static void lmc_ifdown(lmc_softc_t * const sc);
+
+
+/*
+ * Code the read the SROM and MII bit streams (I2C)
+ */
+static void
+lmc_delay_300ns(lmc_softc_t * const sc)
+{
+	int idx;
+	for (idx = (300 / 33) + 1; idx > 0; idx--)
+		(void)LMC_CSR_READ(sc, csr_busmode);
+}
+
+
+#define EMIT    \
+do { \
+	LMC_CSR_WRITE(sc, csr_srom_mii, csr); \
+	lmc_delay_300ns(sc); \
+} while (0)
+
+static void
+lmc_srom_idle(lmc_softc_t * const sc)
+{
+	unsigned bit, csr;
+    
+	csr  = SROMSEL ; EMIT;
+	csr  = SROMSEL | SROMRD; EMIT;  
+	csr ^= SROMCS; EMIT;
+	csr ^= SROMCLKON; EMIT;
+
+	/*
+	 * Write 25 cycles of 0 which will force the SROM to be idle.
+	 */
+	for (bit = 3 + SROM_BITWIDTH + 16; bit > 0; bit--) {
+		csr ^= SROMCLKOFF; EMIT;    /* clock low; data not valid */
+		csr ^= SROMCLKON; EMIT;     /* clock high; data valid */
+	}
+	csr ^= SROMCLKOFF; EMIT;
+	csr ^= SROMCS; EMIT;
+	csr  = 0; EMIT;
+}
+
+     
+static void
+lmc_srom_read(lmc_softc_t * const sc)
+{   
+	unsigned idx; 
+	const unsigned bitwidth = SROM_BITWIDTH;
+	const unsigned cmdmask = (SROMCMD_RD << bitwidth);
+	const unsigned msb = 1 << (bitwidth + 3 - 1);
+	unsigned lastidx = (1 << bitwidth) - 1;
+
+	lmc_srom_idle(sc);
+
+	for (idx = 0; idx <= lastidx; idx++) {
+		unsigned lastbit, data, bits, bit, csr;
+		csr  = SROMSEL ;	        EMIT;
+		csr  = SROMSEL | SROMRD;        EMIT;
+		csr ^= SROMCSON;                EMIT;
+		csr ^=            SROMCLKON;    EMIT;
+    
+		lastbit = 0;
+		for (bits = idx|cmdmask, bit = bitwidth + 3
+			     ; bit > 0
+			     ; bit--, bits <<= 1) {
+			const unsigned thisbit = bits & msb;
+			csr ^= SROMCLKOFF; EMIT;    /* clock L data invalid */
+			if (thisbit != lastbit) {
+				csr ^= SROMDOUT; EMIT;/* clock L invert data */
+			} else {
+				EMIT;
+			}
+			csr ^= SROMCLKON; EMIT;     /* clock H data valid */
+			lastbit = thisbit;
+		}
+		csr ^= SROMCLKOFF; EMIT;
+
+		for (data = 0, bits = 0; bits < 16; bits++) {
+			data <<= 1;
+			csr ^= SROMCLKON; EMIT;     /* clock H data valid */ 
+			data |= LMC_CSR_READ(sc, csr_srom_mii) & SROMDIN ? 1 : 0;
+			csr ^= SROMCLKOFF; EMIT;    /* clock L data invalid */
+		}
+		sc->lmc_rombuf[idx*2] = data & 0xFF;
+		sc->lmc_rombuf[idx*2+1] = data >> 8;
+		csr  = SROMSEL | SROMRD; EMIT;
+		csr  = 0; EMIT;
+	}
+	lmc_srom_idle(sc);
+}
+
+#define MII_EMIT    do { LMC_CSR_WRITE(sc, csr_srom_mii, csr); lmc_delay_300ns(sc); } while (0)
+
+static void
+lmc_mii_writebits(lmc_softc_t * const sc, unsigned data, unsigned bits)
+{
+    unsigned msb = 1 << (bits - 1);
+    unsigned csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
+    unsigned lastbit = (csr & MII_DOUT) ? msb : 0;
+
+    csr |= MII_WR; MII_EMIT;  		/* clock low; assert write */
+
+    for (; bits > 0; bits--, data <<= 1) {
+	const unsigned thisbit = data & msb;
+	if (thisbit != lastbit) {
+	    csr ^= MII_DOUT; MII_EMIT;  /* clock low; invert data */
+	}
+	csr ^= MII_CLKON; MII_EMIT;     /* clock high; data valid */
+	lastbit = thisbit;
+	csr ^= MII_CLKOFF; MII_EMIT;    /* clock low; data not valid */
+    }
+}
+
+static void
+lmc_mii_turnaround(lmc_softc_t * const sc, unsigned cmd)
+{
+    unsigned csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
+
+    if (cmd == MII_WRCMD) {
+	csr |= MII_DOUT; MII_EMIT;	/* clock low; change data */
+	csr ^= MII_CLKON; MII_EMIT;	/* clock high; data valid */
+	csr ^= MII_CLKOFF; MII_EMIT;	/* clock low; data not valid */
+	csr ^= MII_DOUT; MII_EMIT;	/* clock low; change data */
+    } else {
+	csr |= MII_RD; MII_EMIT;	/* clock low; switch to read */
+    }
+    csr ^= MII_CLKON; MII_EMIT;		/* clock high; data valid */
+    csr ^= MII_CLKOFF; MII_EMIT;	/* clock low; data not valid */
+}
+
+static unsigned
+lmc_mii_readbits(lmc_softc_t * const sc)
+{
+    unsigned data;
+    unsigned csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
+    int idx;
+
+    for (idx = 0, data = 0; idx < 16; idx++) {
+	data <<= 1;	/* this is NOOP on the first pass through */
+	csr ^= MII_CLKON; MII_EMIT;	/* clock high; data valid */
+	if (LMC_CSR_READ(sc, csr_srom_mii) & MII_DIN)
+	    data |= 1;
+	csr ^= MII_CLKOFF; MII_EMIT;	/* clock low; data not valid */
+    }
+    csr ^= MII_RD; MII_EMIT;		/* clock low; turn off read */
+
+    return data;
+}
+
+static unsigned
+lmc_mii_readreg(lmc_softc_t * const sc, unsigned devaddr, unsigned regno)
+{
+    unsigned csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
+    unsigned data;
+
+    csr &= ~(MII_RD|MII_CLK); MII_EMIT;
+    lmc_mii_writebits(sc, MII_PREAMBLE, 32);
+    lmc_mii_writebits(sc, MII_RDCMD, 8);
+    lmc_mii_writebits(sc, devaddr, 5);
+    lmc_mii_writebits(sc, regno, 5);
+    lmc_mii_turnaround(sc, MII_RDCMD);
+
+    data = lmc_mii_readbits(sc);
+    return data;
+}
+
+static void
+lmc_mii_writereg(lmc_softc_t * const sc, unsigned devaddr,
+		   unsigned regno, unsigned data)
+{
+    unsigned csr = LMC_CSR_READ(sc, csr_srom_mii) & (MII_RD|MII_DOUT|MII_CLK);
+    csr &= ~(MII_RD|MII_CLK); MII_EMIT;
+    lmc_mii_writebits(sc, MII_PREAMBLE, 32);
+    lmc_mii_writebits(sc, MII_WRCMD, 8);
+    lmc_mii_writebits(sc, devaddr, 5);
+    lmc_mii_writebits(sc, regno, 5);
+    lmc_mii_turnaround(sc, MII_WRCMD);
+    lmc_mii_writebits(sc, data, 16);
+}
+
+static int
+lmc_read_macaddr(lmc_softc_t * const sc)
+{
+	lmc_srom_read(sc);
+
+	bcopy(sc->lmc_rombuf + 20, sc->lmc_enaddr, 6);
+
+	return 0;
+}
+
+/*
+ * Check to make certain there is a signal from the modem, and flicker
+ * lights as needed.
+ */
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+static void
+lmc_watchdog(struct ifnet *ifp)
+#endif
+#if defined(__bsdi__)
+static int
+lmc_watchdog(int unit)
+#endif
+{
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
+#endif
+#if defined(__bsdi__)
+	lmc_softc_t * const sc = LMC_UNIT_TO_SOFTC(unit);
+	struct ifnet *ifp = &sc->lmc_if;
+#endif
+	int state;
+	u_int32_t ostatus;
+	u_int32_t link_status;
+	u_int32_t ticks;
+
+	state = 0;
+
+	link_status = sc->lmc_media->get_link_status(sc);
+	ostatus = ((sc->lmc_flags & LMC_MODEMOK) == LMC_MODEMOK);
+
+	/*
+	 * hardware level link lost, but the interface is marked as up.
+	 * Mark it as down.
+	 */
+        if (link_status == 0 && ostatus) {
+		printf(LMC_PRINTF_FMT ": physical link down\n",
+		       LMC_PRINTF_ARGS);
+		sc->lmc_flags &= ~LMC_MODEMOK;
+		lmc_led_off(sc, LMC_MII16_LED1);
+	}
+
+	/*
+	 * hardware link is up, but the interface is marked as down.
+	 * Bring it back up again.
+	 */
+	if (link_status != 0 && !ostatus) {
+		printf(LMC_PRINTF_FMT ": physical link up\n",
+		       LMC_PRINTF_ARGS);
+		if (sc->lmc_flags & LMC_IFUP)
+			lmc_ifup(sc);
+		sc->lmc_flags |= LMC_MODEMOK;
+		lmc_led_on(sc, LMC_MII16_LED1); 
+		return;
+	}
+
+	/*
+	 * remember the timer value
+	 */
+	ticks = LMC_CSR_READ(sc, csr_gp_timer);
+	LMC_CSR_WRITE(sc, csr_gp_timer, 0xffffffffUL);
+	sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff);
+
+	ifp->if_timer = 1;
+}
+
+/*
+ * Mark the interface as "up" and enable TX/RX and TX/RX interrupts.
+ * This also does a full software reset.
+ */
+static void
+lmc_ifup(lmc_softc_t * const sc)
+{
+	sc->lmc_if.if_timer = 0;
+
+	lmc_dec_reset(sc);
+	lmc_reset(sc);
+
+	sc->lmc_media->set_link_status(sc, 1);
+	sc->lmc_media->set_status(sc, NULL);
+
+	sc->lmc_flags |= LMC_IFUP;
+	lmc_led_on(sc, LMC_MII16_LED1);
+
+	/*
+	 * select what interrupts we want to get
+	 */
+	sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
+			       | TULIP_STS_RXINTR
+			       | TULIP_STS_TXINTR
+			       | TULIP_STS_ABNRMLINTR
+			       | TULIP_STS_SYSERROR
+			       | TULIP_STS_TXSTOPPED
+			       | TULIP_STS_TXUNDERFLOW
+			       | TULIP_STS_RXSTOPPED
+			       );
+	LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
+
+	sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
+	sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
+	LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
+
+	sc->lmc_if.if_timer = 1;
+}
+
+/*
+ * Mark the interface as "down" and disable TX/RX and TX/RX interrupts.
+ * This is done by performing a full reset on the interface.
+ */
+static void
+lmc_ifdown(lmc_softc_t * const sc)
+{
+	sc->lmc_if.if_timer = 0;
+	sc->lmc_flags &= ~LMC_IFUP;
+
+	sc->lmc_media->set_link_status(sc, 0);
+	lmc_led_off(sc, LMC_MII16_LED1);
+
+	lmc_dec_reset(sc);
+	lmc_reset(sc);
+	sc->lmc_media->set_status(sc, NULL);
+}
+
+static void
+lmc_rx_intr(lmc_softc_t * const sc)
+{
+	lmc_ringinfo_t * const ri = &sc->lmc_rxinfo;
+	struct ifnet * const ifp = &sc->lmc_if;
+	int fillok = 1;
+
+	sc->lmc_rxtick++;
+
+	for (;;) {
+		tulip_desc_t *eop = ri->ri_nextin;
+		int total_len = 0, last_offset = 0;
+		struct mbuf *ms = NULL, *me = NULL;
+		int accept = 0;
+
+		if (fillok && sc->lmc_rxq.ifq_len < LMC_RXQ_TARGET)
+			goto queue_mbuf;
+
+		/*
+		 * If the TULIP has no descriptors, there can't be any receive
+		 * descriptors to process.
+		 */
+		if (eop == ri->ri_nextout)
+			break;
+	    
+		/*
+		 * 90% of the packets will fit in one descriptor.  So we
+		 * optimize for that case.
+		 */
+		if ((((volatile tulip_desc_t *) eop)->d_status & (TULIP_DSTS_OWNER|TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) == (TULIP_DSTS_RxFIRSTDESC|TULIP_DSTS_RxLASTDESC)) {
+			IF_DEQUEUE(&sc->lmc_rxq, ms);
+			me = ms;
+		} else {
+			/*
+			 * If still owned by the TULIP, don't touch it.
+			 */
+			if (((volatile tulip_desc_t *)eop)->d_status & TULIP_DSTS_OWNER)
+				break;
+
+			/*
+			 * It is possible (though improbable unless the
+			 * BIG_PACKET support is enabled or MCLBYTES < 1518)
+			 * for a received packet to cross more than one
+			 * receive descriptor.
+			 */
+			while ((((volatile tulip_desc_t *) eop)->d_status & TULIP_DSTS_RxLASTDESC) == 0) {
+				if (++eop == ri->ri_last)
+					eop = ri->ri_first;
+				if (eop == ri->ri_nextout || ((((volatile tulip_desc_t *) eop)->d_status & TULIP_DSTS_OWNER))) {
+					return;
+				}
+				total_len++;
+			}
+
+			/*
+			 * Dequeue the first buffer for the start of the
+			 * packet.  Hopefully this will be the only one we
+			 * need to dequeue.  However, if the packet consumed
+			 * multiple descriptors, then we need to dequeue
+			 * those buffers and chain to the starting mbuf.
+			 * All buffers but the last buffer have the same
+			 * length so we can set that now. (we add to
+			 * last_offset instead of multiplying since we
+			 * normally won't go into the loop and thereby
+			 * saving a ourselves from doing a multiplication
+			 * by 0 in the normal case).
+			 */
+			IF_DEQUEUE(&sc->lmc_rxq, ms);
+			for (me = ms; total_len > 0; total_len--) {
+				me->m_len = LMC_RX_BUFLEN;
+				last_offset += LMC_RX_BUFLEN;
+				IF_DEQUEUE(&sc->lmc_rxq, me->m_next);
+				me = me->m_next;
+			}
+		}
+
+		/*
+		 *  Now get the size of received packet (minus the CRC).
+		 */
+		total_len = ((eop->d_status >> 16) & 0x7FFF);
+		if (sc->ictl.crc_length == 16)
+			total_len -= 2;
+		else
+			total_len -= 4;
+
+		if ((sc->lmc_flags & LMC_RXIGNORE) == 0
+		    && ((eop->d_status & LMC_DSTS_ERRSUM) == 0
+#ifdef BIG_PACKET
+			|| (total_len <= sc->lmc_if.if_mtu + PPP_HEADER_LEN
+			    && (eop->d_status & TULIP_DSTS_RxOVERFLOW) == 0)
+#endif
+			)) {
+			me->m_len = total_len - last_offset;
+#if NBPFILTER > 0
+			if (sc->lmc_bpf != NULL) {
+				if (me == ms)
+					LMC_BPF_TAP(sc, mtod(ms, caddr_t), total_len);
+				else
+					LMC_BPF_MTAP(sc, ms);
+			}
+#endif
+			sc->lmc_flags |= LMC_RXACT;
+			accept = 1;
+		} else {
+			ifp->if_ierrors++;
+			if (eop->d_status & TULIP_DSTS_RxOVERFLOW) {
+				sc->lmc_dot3stats.dot3StatsInternalMacReceiveErrors++;
+			}
+		}
+
+		ifp->if_ipackets++;
+		if (++eop == ri->ri_last)
+			eop = ri->ri_first;
+		ri->ri_nextin = eop;
+
+	queue_mbuf:
+		/*
+		 * Either we are priming the TULIP with mbufs (m == NULL)
+		 * or we are about to accept an mbuf for the upper layers
+		 * so we need to allocate an mbuf to replace it.  If we
+		 * can't replace it, send up it anyways.  This may cause
+		 * us to drop packets in the future but that's better than
+		 * being caught in livelock.
+		 *
+		 * Note that if this packet crossed multiple descriptors
+		 * we don't even try to reallocate all the mbufs here.
+		 * Instead we rely on the test of the beginning of
+		 * the loop to refill for the extra consumed mbufs.
+		 */
+		if (accept || ms == NULL) {
+			struct mbuf *m0;
+			MGETHDR(m0, M_DONTWAIT, MT_DATA);
+			if (m0 != NULL) {
+				MCLGET(m0, M_DONTWAIT);
+				if ((m0->m_flags & M_EXT) == 0) {
+					m_freem(m0);
+					m0 = NULL;
+				}
+			}
+			if (accept) {
+				ms->m_pkthdr.len = total_len;
+				ms->m_pkthdr.rcvif = ifp;
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+				sppp_input(ifp, ms);
+#endif
+#if defined(__bsdi__)
+				sc->lmc_p2pcom.p2p_input(&sc->lmc_p2pcom, ms);
+#endif
+			}
+			ms = m0;
+		}
+		if (ms == NULL) {
+			/*
+			 * Couldn't allocate a new buffer.  Don't bother 
+			 * trying to replenish the receive queue.
+			 */
+			fillok = 0;
+			sc->lmc_flags |= LMC_RXBUFSLOW;
+			continue;
+		}
+		/*
+		 * Now give the buffer(s) to the TULIP and save in our
+		 * receive queue.
+		 */
+		do {
+			ri->ri_nextout->d_length1 = LMC_RX_BUFLEN;
+			ri->ri_nextout->d_addr1 = LMC_KVATOPHYS(sc, mtod(ms, caddr_t));
+			ri->ri_nextout->d_status = TULIP_DSTS_OWNER;
+			if (++ri->ri_nextout == ri->ri_last)
+				ri->ri_nextout = ri->ri_first;
+			me = ms->m_next;
+			ms->m_next = NULL;
+			IF_ENQUEUE(&sc->lmc_rxq, ms);
+		} while ((ms = me) != NULL);
+
+		if (sc->lmc_rxq.ifq_len >= LMC_RXQ_TARGET)
+			sc->lmc_flags &= ~LMC_RXBUFSLOW;
+	}
+}
+
+static int
+lmc_tx_intr(lmc_softc_t * const sc)
+{
+    lmc_ringinfo_t * const ri = &sc->lmc_txinfo;
+    struct mbuf *m;
+    int xmits = 0;
+    int descs = 0;
+
+    sc->lmc_txtick++;
+
+    while (ri->ri_free < ri->ri_max) {
+	u_int32_t d_flag;
+	if (((volatile tulip_desc_t *) ri->ri_nextin)->d_status & TULIP_DSTS_OWNER)
+	    break;
+
+	d_flag = ri->ri_nextin->d_flag;
+	if (d_flag & TULIP_DFLAG_TxLASTSEG) {
+		const u_int32_t d_status = ri->ri_nextin->d_status;
+		IF_DEQUEUE(&sc->lmc_txq, m);
+		if (m != NULL) {
+#if NBPFILTER > 0
+		    if (sc->lmc_bpf != NULL)
+			LMC_BPF_MTAP(sc, m);
+#endif
+		    m_freem(m);
+#if defined(LMC_DEBUG)
+		} else {
+		    printf(LMC_PRINTF_FMT ": tx_intr: failed to dequeue mbuf?!?\n", LMC_PRINTF_ARGS);
+#endif
+		}
+		    xmits++;
+		    if (d_status & LMC_DSTS_ERRSUM) {
+			sc->lmc_if.if_oerrors++;
+			if (d_status & TULIP_DSTS_TxUNDERFLOW)
+			    sc->lmc_dot3stats.dot3StatsInternalTransmitUnderflows++;
+		    } else {
+			if (d_status & TULIP_DSTS_TxDEFERRED)
+			    sc->lmc_dot3stats.dot3StatsDeferredTransmissions++;
+		    }
+	}
+
+	if (++ri->ri_nextin == ri->ri_last)
+	    ri->ri_nextin = ri->ri_first;
+
+	ri->ri_free++;
+	descs++;
+	sc->lmc_if.if_flags &= ~IFF_OACTIVE;
+    }
+    /*
+     * If nothing left to transmit, disable the timer.
+     * Else if progress, reset the timer back to 2 ticks.
+     */
+    sc->lmc_if.if_opackets += xmits;
+
+    return descs;
+}
+
+static void
+lmc_print_abnormal_interrupt (lmc_softc_t * const sc, u_int32_t csr)
+{
+	printf(LMC_PRINTF_FMT ": Abnormal interrupt\n", LMC_PRINTF_ARGS);
+}
+
+static void
+lmc_intr_handler(lmc_softc_t * const sc, int *progress_p)
+{
+    u_int32_t csr;
+
+    while ((csr = LMC_CSR_READ(sc, csr_status)) & sc->lmc_intrmask) {
+
+#if defined(__NetBSD__)
+#if NRND > 0
+	    rnd_add_uint32(&sc->lmc_rndsource, csr);
+#endif
+#endif
+
+	*progress_p = 1;
+	LMC_CSR_WRITE(sc, csr_status, csr);
+
+	if (csr & TULIP_STS_SYSERROR) {
+	    sc->lmc_last_system_error = (csr & TULIP_STS_ERRORMASK) >> TULIP_STS_ERR_SHIFT;
+	    if (sc->lmc_flags & LMC_NOMESSAGES) {
+		sc->lmc_flags |= LMC_SYSTEMERROR;
+	    } else {
+		printf(LMC_PRINTF_FMT ": system error: %s\n",
+		       LMC_PRINTF_ARGS,
+		       lmc_system_errors[sc->lmc_last_system_error]);
+	    }
+	    sc->lmc_flags |= LMC_NEEDRESET;
+	    sc->lmc_system_errors++;
+	    break;
+	}
+	if (csr & (TULIP_STS_RXINTR | TULIP_STS_RXNOBUF)) {
+	    u_int32_t misses = LMC_CSR_READ(sc, csr_missed_frames);
+	    if (csr & TULIP_STS_RXNOBUF)
+		sc->lmc_dot3stats.dot3StatsMissedFrames += misses & 0xFFFF;
+	    /*
+	     * Pass 2.[012] of the 21140A-A[CDE] may hang and/or corrupt data
+	     * on receive overflows.
+	     */
+	   if ((misses & 0x0FFE0000) && (sc->lmc_features & LMC_HAVE_RXBADOVRFLW)) {
+		sc->lmc_dot3stats.dot3StatsInternalMacReceiveErrors++;
+		/*
+		 * Stop the receiver process and spin until it's stopped.
+		 * Tell rx_intr to drop the packets it dequeues.
+		 */
+		LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode & ~TULIP_CMD_RXRUN);
+		while ((LMC_CSR_READ(sc, csr_status) & TULIP_STS_RXSTOPPED) == 0)
+		    ;
+		LMC_CSR_WRITE(sc, csr_status, TULIP_STS_RXSTOPPED);
+		sc->lmc_flags |= LMC_RXIGNORE;
+	    }
+	    lmc_rx_intr(sc);
+	    if (sc->lmc_flags & LMC_RXIGNORE) {
+		/*
+		 * Restart the receiver.
+		 */
+		sc->lmc_flags &= ~LMC_RXIGNORE;
+		LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
+	    }
+	}
+	if (csr & TULIP_STS_ABNRMLINTR) {
+	    u_int32_t tmp = csr & sc->lmc_intrmask
+		& ~(TULIP_STS_NORMALINTR|TULIP_STS_ABNRMLINTR);
+	    if (csr & TULIP_STS_TXUNDERFLOW) {
+		if ((sc->lmc_cmdmode & TULIP_CMD_THRESHOLDCTL) != TULIP_CMD_THRSHLD160) {
+		    sc->lmc_cmdmode += TULIP_CMD_THRSHLD96;
+		    sc->lmc_flags |= LMC_NEWTXTHRESH;
+		} else if (sc->lmc_features & LMC_HAVE_STOREFWD) {
+		    sc->lmc_cmdmode |= TULIP_CMD_STOREFWD;
+		    sc->lmc_flags |= LMC_NEWTXTHRESH;
+		}
+	    }
+	    if (sc->lmc_flags & LMC_NOMESSAGES) {
+		sc->lmc_statusbits |= tmp;
+	    } else {
+		lmc_print_abnormal_interrupt(sc, tmp);
+		sc->lmc_flags |= LMC_NOMESSAGES;
+	    }
+	    LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
+	}
+
+	if (csr & TULIP_STS_TXINTR)
+		lmc_tx_intr(sc);
+
+	if (sc->lmc_flags & LMC_WANTTXSTART)
+	    lmc_ifstart(&sc->lmc_if);
+    }
+}
+
+static lmc_intrfunc_t
+lmc_intr_normal(void *arg)
+{
+	lmc_softc_t * sc = (lmc_softc_t *) arg;
+	int progress = 0;
+
+	lmc_intr_handler(sc, &progress);
+
+#if !defined(LMC_VOID_INTRFUNC)
+	return progress;
+#endif
+}
+
+static struct mbuf *
+lmc_mbuf_compress(struct mbuf *m)
+{
+	struct mbuf *m0;
+#if MCLBYTES >= LMC_MTU + PPP_HEADER_LEN && !defined(BIG_PACKET)
+	MGETHDR(m0, M_DONTWAIT, MT_DATA);
+	if (m0 != NULL) {
+		if (m->m_pkthdr.len > MHLEN) {
+			MCLGET(m0, M_DONTWAIT);
+			if ((m0->m_flags & M_EXT) == 0) {
+				m_freem(m);
+				m_freem(m0);
+				return NULL;
+			}
+		}
+		m_copydata(m, 0, m->m_pkthdr.len, mtod(m0, caddr_t));
+		m0->m_pkthdr.len = m0->m_len = m->m_pkthdr.len;
+	}
+#else
+	int mlen = MHLEN;
+	int len = m->m_pkthdr.len;
+	struct mbuf **mp = &m0;
+
+	while (len > 0) {
+		if (mlen == MHLEN) {
+			MGETHDR(*mp, M_DONTWAIT, MT_DATA);
+		} else {
+			MGET(*mp, M_DONTWAIT, MT_DATA);
+		}
+		if (*mp == NULL) {
+			m_freem(m0);
+			m0 = NULL;
+			break;
+		}
+		if (len > MLEN) {
+			MCLGET(*mp, M_DONTWAIT);
+			if (((*mp)->m_flags & M_EXT) == 0) {
+				m_freem(m0);
+				m0 = NULL;
+				break;
+			}
+			(*mp)->m_len = (len <= MCLBYTES ? len : MCLBYTES);
+		} else {
+			(*mp)->m_len = (len <= mlen ? len : mlen);
+		}
+		m_copydata(m, m->m_pkthdr.len - len,
+			   (*mp)->m_len, mtod((*mp), caddr_t));
+		len -= (*mp)->m_len;
+		mp = &(*mp)->m_next;
+		mlen = MLEN;
+	}
+#endif
+	m_freem(m);
+	return m0;
+}
+
+/*
+ * queue the mbuf handed to us for the interface.  If we cannot
+ * queue it, return the mbuf.  Return NULL if the mbuf was queued.
+ */
+static struct mbuf *
+lmc_txput(lmc_softc_t * const sc, struct mbuf *m)
+{
+	lmc_ringinfo_t * const ri = &sc->lmc_txinfo;
+	tulip_desc_t *eop, *nextout;
+	int segcnt, free;
+	u_int32_t d_status;
+	struct mbuf *m0;
+
+#if defined(LMC_DEBUG)
+	if ((sc->lmc_cmdmode & TULIP_CMD_TXRUN) == 0) {
+		printf(LMC_PRINTF_FMT ": txput: tx not running\n",
+		       LMC_PRINTF_ARGS);
+		sc->lmc_flags |= LMC_WANTTXSTART;
+		goto finish;
+	}
+#endif
+
+	/*
+	 * Now we try to fill in our transmit descriptors.  This is
+	 * a bit reminiscent of going on the Ark two by two
+	 * since each descriptor for the TULIP can describe
+	 * two buffers.  So we advance through packet filling
+	 * each of the two entries at a time to fill each
+	 * descriptor.  Clear the first and last segment bits
+	 * in each descriptor (actually just clear everything
+	 * but the end-of-ring or chain bits) to make sure
+	 * we don't get messed up by previously sent packets.
+	 *
+	 * We may fail to put the entire packet on the ring if
+	 * there is either not enough ring entries free or if the
+	 * packet has more than MAX_TXSEG segments.  In the former
+	 * case we will just wait for the ring to empty.  In the
+	 * latter case we have to recopy.
+	 */
+ again:
+	d_status = 0;
+	eop = nextout = ri->ri_nextout;
+	m0 = m;
+	segcnt = 0;
+	free = ri->ri_free;
+	do {
+		int len = m0->m_len;
+		caddr_t addr = mtod(m0, caddr_t);
+		unsigned clsize = CLBYTES - (((u_long) addr) & (CLBYTES-1));
+
+		while (len > 0) {
+			unsigned slen = min(len, clsize);
+#ifdef BIG_PACKET
+			int partial = 0;
+			if (slen >= 2048)
+				slen = 2040, partial = 1;
+#endif
+			segcnt++;
+			if (segcnt > LMC_MAX_TXSEG) {
+				/*
+				 * The packet exceeds the number of transmit
+				 * buffer entries that we can use for one
+				 * packet, so we have recopy it into one mbuf
+				 * and then try again.
+				 */
+				m = lmc_mbuf_compress(m);
+				if (m == NULL)
+					goto finish;
+				goto again;
+			}
+			if (segcnt & 1) {
+				if (--free == 0) {
+					/*
+					 * See if there's any unclaimed space
+					 * in the transmit ring.
+					 */
+					if ((free += lmc_tx_intr(sc)) == 0) {
+						/*
+						 * There's no more room but
+						 * since nothing has been
+						 * committed at this point,
+						 * just show output is active,
+						 * put back the mbuf and
+						 * return.
+						 */
+						sc->lmc_flags |= LMC_WANTTXSTART;
+						goto finish;
+					}
+				}
+				eop = nextout;
+				if (++nextout == ri->ri_last)
+					nextout = ri->ri_first;
+				eop->d_flag &= TULIP_DFLAG_ENDRING;
+				eop->d_flag |= TULIP_DFLAG_TxNOPADDING;
+				if (sc->ictl.crc_length == 16)
+					eop->d_flag |= TULIP_DFLAG_TxHASCRC;
+				eop->d_status = d_status;
+				eop->d_addr1 = LMC_KVATOPHYS(sc, addr);
+				eop->d_length1 = slen;
+			} else {
+				/*
+				 *  Fill in second half of descriptor
+				 */
+				eop->d_addr2 = LMC_KVATOPHYS(sc, addr);
+				eop->d_length2 = slen;
+			}
+			d_status = TULIP_DSTS_OWNER;
+			len -= slen;
+			addr += slen;
+#ifdef BIG_PACKET
+			if (partial)
+				continue;
+#endif
+			clsize = CLBYTES;
+		}
+	} while ((m0 = m0->m_next) != NULL);
+
+
+	/*
+	 * The descriptors have been filled in.  Now get ready
+	 * to transmit.
+	 */
+	IF_ENQUEUE(&sc->lmc_txq, m);
+	m = NULL;
+
+	/*
+	 * Make sure the next descriptor after this packet is owned
+	 * by us since it may have been set up above if we ran out
+	 * of room in the ring.
+	 */
+	nextout->d_status = 0;
+
+	/*
+	 * If we only used the first segment of the last descriptor,
+	 * make sure the second segment will not be used.
+	 */
+	if (segcnt & 1) {
+		eop->d_addr2 = 0;
+		eop->d_length2 = 0;
+	}
+
+	/*
+	 * Mark the last and first segments, indicate we want a transmit
+	 * complete interrupt, and tell it to transmit!
+	 */
+	eop->d_flag |= TULIP_DFLAG_TxLASTSEG | TULIP_DFLAG_TxWANTINTR;
+
+	/*
+	 * Note that ri->ri_nextout is still the start of the packet
+	 * and until we set the OWNER bit, we can still back out of
+	 * everything we have done.
+	 */
+	ri->ri_nextout->d_flag |= TULIP_DFLAG_TxFIRSTSEG;
+	ri->ri_nextout->d_status = TULIP_DSTS_OWNER;
+
+	LMC_CSR_WRITE(sc, csr_txpoll, 1);
+
+	/*
+	 * This advances the ring for us.
+	 */
+	ri->ri_nextout = nextout;
+	ri->ri_free = free;
+
+	/*
+	 * switch back to the single queueing ifstart.
+	 */
+	sc->lmc_flags &= ~LMC_WANTTXSTART;
+	sc->lmc_if.if_start = lmc_ifstart_one;
+
+	/*
+	 * If we want a txstart, there must be not enough space in the
+	 * transmit ring.  So we want to enable transmit done interrupts
+	 * so we can immediately reclaim some space.  When the transmit
+	 * interrupt is posted, the interrupt handler will call tx_intr
+	 * to reclaim space and then txstart (since WANTTXSTART is set).
+	 * txstart will move the packet into the transmit ring and clear
+	 * WANTTXSTART thereby causing TXINTR to be cleared.
+	 */
+ finish:
+	if (sc->lmc_flags & LMC_WANTTXSTART) {
+		sc->lmc_if.if_flags |= IFF_OACTIVE;
+		sc->lmc_if.if_start = lmc_ifstart;
+	}
+
+	return m;
+}
+
+
+/*
+ * This routine is entered at splnet() (splsoftnet() on NetBSD)
+ */
+static int
+lmc_ifioctl(struct ifnet * ifp, ioctl_cmd_t cmd, caddr_t data)
+{
+	lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	lmc_spl_t s;
+#endif
+	int error = 0;
+	struct ifreq *ifr = (struct ifreq *)data;
+	u_int32_t new_state;
+	u_int32_t old_state;
+	lmc_ctl_t ctl;
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	s = LMC_RAISESPL();
+#endif
+
+	switch (cmd) {
+	case LMCIOCGINFO:
+		error = copyout(&sc->ictl, ifr->ifr_data, sizeof(lmc_ctl_t));
+
+		goto out;
+		break;
+
+	case LMCIOCSINFO:
+#if 0 /* XXX */
+		error = suser(p->p_ucred, &p->p_acflag);
+		if (error)
+			goto out;
+#endif
+
+		error = copyin(ifr->ifr_data, &ctl, sizeof(lmc_ctl_t));
+		if (error != 0)
+			goto out;
+
+		sc->lmc_media->set_status(sc, &ctl);
+
+		goto out;
+		break;
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	case SIOCSIFMTU:
+		/*
+		 * Don't allow the MTU to get larger than we can handle
+		 */
+		if (ifr->ifr_mtu > LMC_MTU) {
+			error = EINVAL;
+			goto out;
+		}
+#endif
+	}
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	/*
+	 * call the sppp ioctl layer
+	 */
+	error = sppp_ioctl(ifp, cmd, data);
+	if (error != 0)
+		goto out;
+#endif
+
+#if defined(__bsdi__)
+	error = p2p_ioctl(ifp, cmd, data);
+#endif
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	/*
+	 * If we are transitioning from up to down or down to up, call
+	 * our init routine.
+	 */
+	new_state = ifp->if_flags & IFF_UP;
+	old_state = sc->lmc_flags & LMC_IFUP;
+
+	if (new_state && !old_state)
+		lmc_ifup(sc);
+	else if (!new_state && old_state)
+		lmc_ifdown(sc);
+#endif
+
+ out:
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	LMC_RESTORESPL(s);
+#endif
+
+	return error;
+}
+
+/*
+ * These routines gets called at device spl (from sppp_output).
+ */
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+static ifnet_ret_t
+lmc_ifstart(struct ifnet * const ifp)
+{
+	lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
+	struct mbuf *m;
+
+	if (sc->lmc_flags & LMC_IFUP) {
+		while (sppp_isempty(ifp) == 0) {
+			m = sppp_dequeue(ifp);
+			if ((m = lmc_txput(sc, m)) != NULL) {
+				IF_PREPEND(&((struct sppp *)ifp)->pp_fastq, m);
+				break;
+			}
+		}
+		LMC_CSR_WRITE(sc, csr_txpoll, 1);
+	}
+}
+
+static ifnet_ret_t
+lmc_ifstart_one(struct ifnet * const ifp)
+{
+	lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
+	struct mbuf *m;
+
+	if ((sc->lmc_flags & LMC_IFUP) && (sppp_isempty(ifp) == 0)) {
+		m = sppp_dequeue(ifp);
+		if ((m = lmc_txput(sc, m)) != NULL) {
+			IF_PREPEND(&((struct sppp *)ifp)->pp_fastq, m);
+		}
+		LMC_CSR_WRITE(sc, csr_txpoll, 1);
+	}
+}
+#endif
+
+#if defined(__bsdi__)
+static ifnet_ret_t
+lmc_ifstart(struct ifnet * const ifp)
+{
+	lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
+	struct mbuf *m;
+	struct ifqueue *ifq;
+
+	if ((sc->lmc_flags & LMC_IFUP) == 0)
+		return;
+
+	for (;;) {
+		ifq = &sc->lmc_p2pcom.p2p_isnd;
+
+		m = ifq->ifq_head;
+		if (m == NULL) {
+			ifq = &sc->lmc_if.if_snd;
+			m = ifq->ifq_head;
+		}
+		if (m == NULL)
+			break;
+		IF_DEQUEUE(ifq, m);
+
+		m = lmc_txput(sc, m);
+		if (m != NULL) {
+			IF_PREPEND(ifq, m);
+			break;
+		}
+	}
+
+	LMC_CSR_WRITE(sc, csr_txpoll, 1);
+}
+
+static ifnet_ret_t
+lmc_ifstart_one(struct ifnet * const ifp)
+{
+	lmc_softc_t * const sc = LMC_IFP_TO_SOFTC(ifp);
+	struct mbuf *m;
+	struct ifqueue *ifq;
+
+	if ((sc->lmc_flags & LMC_IFUP) == 0)
+		return;
+
+	ifq = &sc->lmc_p2pcom.p2p_isnd;
+
+	m = ifq->ifq_head;
+	if (m == NULL) {
+		ifq = &sc->lmc_if.if_snd;
+		m = ifq->ifq_head;
+	}
+	if (m == NULL)
+		return 0;
+	IF_DEQUEUE(ifq, m);
+
+	m = lmc_txput(sc, m);
+	if (m != NULL)
+		IF_PREPEND(ifq, m);
+
+	LMC_CSR_WRITE(sc, csr_txpoll, 1);
+}
+#endif
+
+#if defined(__bsdi__)
+int
+lmc_getmdm(struct p2pcom *pp, caddr_t b)
+{
+	lmc_softc_t *sc = LMC_UNIT_TO_SOFTC(pp->p2p_if.if_unit);
+
+	if (sc->lmc_media->get_link_status(sc)) {
+		*(int *)b = TIOCM_CAR;
+	} else {
+		*(int *)b = 0;
+	}
+
+	return (0);
+}
+
+int
+lmc_mdmctl(struct p2pcom *pp, int flag)
+{
+	lmc_softc_t *sc = LMC_UNIT_TO_SOFTC(pp->p2p_if.if_unit);
+
+	sc->lmc_media->set_link_status(sc, flag);
+
+	if (flag)
+		if ((sc->lmc_flags & LMC_IFUP) == 0)
+			lmc_ifup(sc);
+	else
+		if ((sc->lmc_flags & LMC_IFUP) == LMC_IFUP)
+			lmc_ifdown(sc);
+
+	return (0);
+}
+#endif
+
+/*
+ * Set up the OS interface magic and attach to the operating system
+ * network services.
+ */
+static void
+lmc_attach(lmc_softc_t * const sc)
+{
+	struct ifnet * const ifp = &sc->lmc_if;
+
+	ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
+	ifp->if_ioctl = lmc_ifioctl;
+	ifp->if_start = lmc_ifstart;
+	ifp->if_watchdog = lmc_watchdog;
+	ifp->if_timer = 1;
+	ifp->if_mtu = LMC_MTU;
+
+#if defined(__bsdi__)
+	ifp->if_type = IFT_NONE;
+	ifp->if_unit = (sc->lmc_dev.dv_unit);
+#endif
+  
+	if_attach(ifp);
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+	sppp_attach((struct ifnet *)&sc->lmc_sppp);
+	sc->lmc_sppp.pp_flags = PP_CISCO | PP_KEEPALIVE;
+#endif
+#if defined(__bsdi__)
+	sc->lmc_p2pcom.p2p_mdmctl = lmc_mdmctl;
+	sc->lmc_p2pcom.p2p_getmdm = lmc_getmdm;
+	p2p_attach(&sc->lmc_p2pcom);
+#endif
+
+#if NBPFILTER > 0
+	LMC_BPF_ATTACH(sc);
+#endif
+
+#if defined(__NetBSD__) && NRND > 0
+	rnd_attach_source(&sc->lmc_rndsource, sc->lmc_dev.dv_xname,
+			  RND_TYPE_NET);
+#endif
+
+	/*
+	 * turn off those LEDs...
+	 */
+	sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
+	lmc_led_on(sc, LMC_MII16_LED0);
+}
+
+static void
+lmc_initring(lmc_softc_t * const sc, lmc_ringinfo_t * const ri,
+	       tulip_desc_t *descs, int ndescs)
+{
+	ri->ri_max = ndescs;
+	ri->ri_first = descs;
+	ri->ri_last = ri->ri_first + ri->ri_max;
+	bzero((caddr_t) ri->ri_first, sizeof(ri->ri_first[0]) * ri->ri_max);
+	ri->ri_last[-1].d_flag = TULIP_DFLAG_ENDRING;
+}
+
+/*
+ * This is the PCI configuration support.
+ */
+#define	PCI_CFID	0x00	/* Configuration ID */
+#define	PCI_CFCS	0x04	/* Configurtion Command/Status */
+#define	PCI_CFRV	0x08	/* Configuration Revision */
+#define	PCI_CFLT	0x0c	/* Configuration Latency Timer */
+#define	PCI_CBIO	0x10	/* Configuration Base IO Address */
+#define	PCI_CBMA	0x14	/* Configuration Base Memory Address */
+#define PCI_SSID	0x2c	/* subsystem config register */
+#define	PCI_CFIT	0x3c	/* Configuration Interrupt */
+#define	PCI_CFDA	0x40	/* Configuration Driver Area */
+
+
+
+#if defined(__NetBSD__)
+#include "dev/pci/if_lmc_nbsd.c"
+#elif defined(__FreeBSD__)
+#include "pci/if_lmc_fbsd.c"
+#elif defined(__bsdi__)
+#include "i386/pci/if_lmc_bsdi.c"
+#else
+#error "This driver only works on NetBSD, FreeBSD, or BSDi"
+#endif