Add device driver support for the Level 1 LXT1001 NetCellerator

gigabit ethernet controller chip. This device is used on some
fiber optic gigE cards from SMC, D-Link and Addtron. Jumbograms and
TCP/IP checksum offload on receive are supported. Hardware VLAN
filtering is not, because it doesn't play well with our existing
VLAN code. Also add manual page.

There is a 4.x version of this driver available at
http://www.freebsd.org/~wpaul/Level1/4.x if anyone feels adventurous
and wants to test it. I still need to do performance testing and
tuning with this device.

(For my next trick, I will make the 3Com 3cR990 sit up and beg.)

1 files changed, 1628 insertions, 0 deletions

diff --git a/sys/dev/lge/if_lge.c b/sys/dev/lge/if_lge.c
new file mode 100644
index 0000000..065995c
--- /dev/null
+++ b/sys/dev/lge/if_lge.c
@@ -0,0 +1,1628 @@
+/*
+ * Copyright (c) 2001 Wind River Systems
+ * Copyright (c) 1997, 1998, 1999, 2000, 2001
+ *	Bill Paul <william.paul@windriver.com>.  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 Bill Paul.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Level 1 LXT1001 gigabit ethernet driver for FreeBSD. Public
+ * documentation not available, but ask me nicely.
+ *
+ * Written by Bill Paul <william.paul@windriver.com>
+ * Wind River Systems
+ */
+
+/*
+ * The Level 1 chip is used on some D-Link, SMC and Addtron NICs.
+ * It's a 64-bit PCI part that supports TCP/IP checksum offload,
+ * VLAN tagging/insertion, GMII and TBI (1000baseX) ports. There
+ * are three supported methods for data transfer between host and
+ * NIC: programmed I/O, traditional scatter/gather DMA and Packet
+ * Propulsion Technology (tm) DMA. The latter mechanism is a form
+ * of double buffer DMA where the packet data is copied to a
+ * pre-allocated DMA buffer who's physical address has been loaded
+ * into a table at device initialization time. The rationale is that
+ * the virtual to physical address translation needed for normal
+ * scatter/gather DMA is more expensive than the data copy needed
+ * for double buffering. This may be true in Windows NT and the like,
+ * but it isn't true for us, at least on the x86 arch. This driver
+ * uses the scatter/gather I/O method for both TX and RX.
+ *
+ * The LXT1001 only supports TCP/IP checksum offload on receive.
+ * Also, the VLAN tagging is done using a 16-entry table which allows
+ * the chip to perform hardware filtering based on VLAN tags. Sadly,
+ * our vlan support doesn't currently play well with this kind of
+ * hardware support.
+ *
+ * Special thanks to:
+ * - Jeff James at Intel, for arranging to have the LXT1001 manual
+ *   released (at long last)
+ * - Beny Chen at D-Link, for actually sending it to me
+ * - Brad Short and Keith Alexis at SMC, for sending me sample
+ *   SMC9462SX and SMC9462TX adapters for testing
+ * - Paul Saab at Y!, for not killing me (though it remains to be seen
+ *   if in fact he did me much of a favor)
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sockio.h>
+#include <sys/mbuf.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <net/ethernet.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+
+#include <net/bpf.h>
+
+#include <vm/vm.h>              /* for vtophys */
+#include <vm/pmap.h>            /* for vtophys */
+#include <machine/clock.h>      /* for DELAY */
+#include <machine/bus_pio.h>
+#include <machine/bus_memio.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <dev/mii/mii.h>
+#include <dev/mii/miivar.h>
+
+#include <pci/pcireg.h>
+#include <pci/pcivar.h>
+
+#define LGE_USEIOSPACE
+
+#include <dev/lge/if_lgereg.h>
+
+/* "controller miibus0" required.  See GENERIC if you get errors here. */
+#include "miibus_if.h"
+
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif
+
+/*
+ * Various supported device vendors/types and their names.
+ */
+static struct lge_type lge_devs[] = {
+	{ LGE_VENDORID, LGE_DEVICEID, "Level 1 Gigabit Ethernet" },
+	{ 0, 0, NULL }
+};
+
+static int lge_probe		__P((device_t));
+static int lge_attach		__P((device_t));
+static int lge_detach		__P((device_t));
+
+static int lge_alloc_jumbo_mem	__P((struct lge_softc *));
+static void lge_free_jumbo_mem	__P((struct lge_softc *));
+static void *lge_jalloc		__P((struct lge_softc *));
+static void lge_jfree		__P((caddr_t, void *));
+
+static int lge_newbuf		__P((struct lge_softc *,
+					struct lge_rx_desc *,
+					struct mbuf *));
+static int lge_encap		__P((struct lge_softc *,
+					struct mbuf *, u_int32_t *));
+static void lge_rxeof		__P((struct lge_softc *, int));
+static void lge_rxeoc		__P((struct lge_softc *));
+static void lge_txeof		__P((struct lge_softc *));
+static void lge_intr		__P((void *));
+static void lge_tick		__P((void *));
+static void lge_start		__P((struct ifnet *));
+static int lge_ioctl		__P((struct ifnet *, u_long, caddr_t));
+static void lge_init		__P((void *));
+static void lge_stop		__P((struct lge_softc *));
+static void lge_watchdog		__P((struct ifnet *));
+static void lge_shutdown		__P((device_t));
+static int lge_ifmedia_upd	__P((struct ifnet *));
+static void lge_ifmedia_sts	__P((struct ifnet *, struct ifmediareq *));
+
+static void lge_eeprom_getword	__P((struct lge_softc *, int, u_int16_t *));
+static void lge_read_eeprom	__P((struct lge_softc *, caddr_t, int,
+							int, int));
+
+static int lge_miibus_readreg	__P((device_t, int, int));
+static int lge_miibus_writereg	__P((device_t, int, int, int));
+static void lge_miibus_statchg	__P((device_t));
+
+static void lge_setmulti	__P((struct lge_softc *));
+static u_int32_t lge_crc	__P((struct lge_softc *, caddr_t));
+static void lge_reset		__P((struct lge_softc *));
+static int lge_list_rx_init	__P((struct lge_softc *));
+static int lge_list_tx_init	__P((struct lge_softc *));
+
+#ifdef LGE_USEIOSPACE
+#define LGE_RES			SYS_RES_IOPORT
+#define LGE_RID			LGE_PCI_LOIO
+#else
+#define LGE_RES			SYS_RES_MEMORY
+#define LGE_RID			LGE_PCI_LOMEM
+#endif
+
+static device_method_t lge_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		lge_probe),
+	DEVMETHOD(device_attach,	lge_attach),
+	DEVMETHOD(device_detach,	lge_detach),
+	DEVMETHOD(device_shutdown,	lge_shutdown),
+
+	/* bus interface */
+	DEVMETHOD(bus_print_child,	bus_generic_print_child),
+	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
+
+	/* MII interface */
+	DEVMETHOD(miibus_readreg,	lge_miibus_readreg),
+	DEVMETHOD(miibus_writereg,	lge_miibus_writereg),
+	DEVMETHOD(miibus_statchg,	lge_miibus_statchg),
+
+	{ 0, 0 }
+};
+
+static driver_t lge_driver = {
+	"lge",
+	lge_methods,
+	sizeof(struct lge_softc)
+};
+
+static devclass_t lge_devclass;
+
+DRIVER_MODULE(if_lge, pci, lge_driver, lge_devclass, 0, 0);
+DRIVER_MODULE(miibus, lge, miibus_driver, miibus_devclass, 0, 0);
+
+#define LGE_SETBIT(sc, reg, x)				\
+	CSR_WRITE_4(sc, reg,				\
+		CSR_READ_4(sc, reg) | (x))
+
+#define LGE_CLRBIT(sc, reg, x)				\
+	CSR_WRITE_4(sc, reg,				\
+		CSR_READ_4(sc, reg) & ~(x))
+
+#define SIO_SET(x)					\
+	CSR_WRITE_4(sc, LGE_MEAR, CSR_READ_4(sc, LGE_MEAR) | x)
+
+#define SIO_CLR(x)					\
+	CSR_WRITE_4(sc, LGE_MEAR, CSR_READ_4(sc, LGE_MEAR) & ~x)
+
+/*
+ * Read a word of data stored in the EEPROM at address 'addr.'
+ */
+static void lge_eeprom_getword(sc, addr, dest)
+	struct lge_softc	*sc;
+	int			addr;
+	u_int16_t		*dest;
+{
+	register int		i;
+	u_int32_t		val;
+
+	CSR_WRITE_4(sc, LGE_EECTL, LGE_EECTL_CMD_READ|
+	    LGE_EECTL_SINGLEACCESS|((addr >> 1) << 8));
+
+	for (i = 0; i < LGE_TIMEOUT; i++)
+		if (!(CSR_READ_4(sc, LGE_EECTL) & LGE_EECTL_CMD_READ))
+			break;
+
+	if (i == LGE_TIMEOUT) {
+		printf("lge%d: EEPROM read timed out\n", sc->lge_unit);
+		return;
+	}
+
+	val = CSR_READ_4(sc, LGE_EEDATA);
+
+	if (addr & 1)
+		*dest = (val >> 16) & 0xFFFF;
+	else
+		*dest = val & 0xFFFF;
+
+	return;
+}
+
+/*
+ * Read a sequence of words from the EEPROM.
+ */
+static void lge_read_eeprom(sc, dest, off, cnt, swap)
+	struct lge_softc	*sc;
+	caddr_t			dest;
+	int			off;
+	int			cnt;
+	int			swap;
+{
+	int			i;
+	u_int16_t		word = 0, *ptr;
+
+	for (i = 0; i < cnt; i++) {
+		lge_eeprom_getword(sc, off + i, &word);
+		ptr = (u_int16_t *)(dest + (i * 2));
+		if (swap)
+			*ptr = ntohs(word);
+		else
+			*ptr = word;
+	}
+
+	return;
+}
+
+static int lge_miibus_readreg(dev, phy, reg)
+	device_t		dev;
+	int			phy, reg;
+{
+	struct lge_softc	*sc;
+	int			i;
+
+	sc = device_get_softc(dev);
+
+	/*
+	 * If we have a non-PCS PHY, pretend that the internal
+	 * autoneg stuff at PHY address 0 isn't there so that
+	 * the miibus code will find only the GMII PHY.
+	 */
+	if (sc->lge_pcs == 0 && phy == 0)
+		return(0);
+
+	CSR_WRITE_4(sc, LGE_GMIICTL, (phy << 8) | reg | LGE_GMIICMD_READ);
+
+	for (i = 0; i < LGE_TIMEOUT; i++)
+		if (!(CSR_READ_4(sc, LGE_GMIICTL) & LGE_GMIICTL_CMDBUSY))
+			break;
+
+	if (i == LGE_TIMEOUT) {
+		printf("lge%d: PHY read timed out\n", sc->lge_unit);
+		return(0);
+	}
+
+	return(CSR_READ_4(sc, LGE_GMIICTL) >> 16);
+}
+
+static int lge_miibus_writereg(dev, phy, reg, data)
+	device_t		dev;
+	int			phy, reg, data;
+{
+	struct lge_softc	*sc;
+	int			i;
+
+	sc = device_get_softc(dev);
+
+	CSR_WRITE_4(sc, LGE_GMIICTL,
+	    (data << 16) | (phy << 8) | reg | LGE_GMIICMD_WRITE);
+
+	for (i = 0; i < LGE_TIMEOUT; i++)
+		if (!(CSR_READ_4(sc, LGE_GMIICTL) & LGE_GMIICTL_CMDBUSY))
+			break;
+
+	if (i == LGE_TIMEOUT) {
+		printf("lge%d: PHY write timed out\n", sc->lge_unit);
+		return(0);
+	}
+
+	return(0);
+}
+
+static void lge_miibus_statchg(dev)
+	device_t		dev;
+{
+	struct lge_softc	*sc;
+	struct mii_data		*mii;
+
+	sc = device_get_softc(dev);
+	mii = device_get_softc(sc->lge_miibus);
+
+	LGE_CLRBIT(sc, LGE_GMIIMODE, LGE_GMIIMODE_SPEED);
+	switch (IFM_SUBTYPE(mii->mii_media_active)) {
+	case IFM_1000_TX:
+	case IFM_1000_SX:
+		LGE_SETBIT(sc, LGE_GMIIMODE, LGE_SPEED_1000);
+		break;
+	case IFM_100_TX:
+		LGE_SETBIT(sc, LGE_GMIIMODE, LGE_SPEED_100);
+		break;
+	case IFM_10_T:
+		LGE_SETBIT(sc, LGE_GMIIMODE, LGE_SPEED_10);
+		break;
+	default:
+		/*
+		 * Choose something, even if it's wrong. Clearing
+		 * all the bits will hose autoneg on the internal
+		 * PHY.
+		 */
+		LGE_SETBIT(sc, LGE_GMIIMODE, LGE_SPEED_1000);
+		break;
+	}
+
+	if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
+		LGE_SETBIT(sc, LGE_GMIIMODE, LGE_GMIIMODE_FDX);
+	} else {
+		LGE_CLRBIT(sc, LGE_GMIIMODE, LGE_GMIIMODE_FDX);
+	}
+
+	return;
+}
+
+static u_int32_t lge_crc(sc, addr)
+	struct lge_softc	*sc;
+	caddr_t			addr;
+{
+	u_int32_t		crc, carry;
+	int			i, j;
+	u_int8_t		c;
+
+	/* Compute CRC for the address value. */
+	crc = 0xFFFFFFFF; /* initial value */
+
+	for (i = 0; i < 6; i++) {
+		c = *(addr + i);
+		for (j = 0; j < 8; j++) {
+			carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01);
+			crc <<= 1;
+			c >>= 1;
+			if (carry)
+				crc = (crc ^ 0x04c11db6) | carry;
+		}
+	}
+
+	/*
+	 * return the filter bit position
+	 */
+	return((crc >> 26) & 0x0000003F);
+}
+
+static void lge_setmulti(sc)
+	struct lge_softc	*sc;
+{
+	struct ifnet		*ifp;
+	struct ifmultiaddr	*ifma;
+	u_int32_t		h = 0, hashes[2] = { 0, 0 };
+
+	ifp = &sc->arpcom.ac_if;
+
+	/* Make sure multicast hash table is enabled. */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_SETRST_CTL1|LGE_MODE1_RX_MCAST);
+
+	if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
+		CSR_WRITE_4(sc, LGE_MAR0, 0xFFFFFFFF);
+		CSR_WRITE_4(sc, LGE_MAR1, 0xFFFFFFFF);
+		return;
+	}
+
+	/* first, zot all the existing hash bits */
+	CSR_WRITE_4(sc, LGE_MAR0, 0);
+	CSR_WRITE_4(sc, LGE_MAR1, 0);
+
+	/* now program new ones */
+	TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
+		if (ifma->ifma_addr->sa_family != AF_LINK)
+			continue;
+		h = lge_crc(sc, LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
+		if (h < 32)
+			hashes[0] |= (1 << h);
+		else
+			hashes[1] |= (1 << (h - 32));
+	}
+
+	CSR_WRITE_4(sc, LGE_MAR0, hashes[0]);
+	CSR_WRITE_4(sc, LGE_MAR1, hashes[1]);
+
+	return;
+}
+
+static void lge_reset(sc)
+	struct lge_softc	*sc;
+{
+	register int		i;
+
+	LGE_SETBIT(sc, LGE_MODE1, LGE_MODE1_SETRST_CTL0|LGE_MODE1_SOFTRST);
+
+	for (i = 0; i < LGE_TIMEOUT; i++) {
+		if (!(CSR_READ_4(sc, LGE_MODE1) & LGE_MODE1_SOFTRST))
+			break;
+	}
+
+	if (i == LGE_TIMEOUT)
+		printf("lge%d: reset never completed\n", sc->lge_unit);
+
+	/* Wait a little while for the chip to get its brains in order. */
+	DELAY(1000);
+
+        return;
+}
+
+/*
+ * Probe for a Level 1 chip. Check the PCI vendor and device
+ * IDs against our list and return a device name if we find a match.
+ */
+static int lge_probe(dev)
+	device_t		dev;
+{
+	struct lge_type		*t;
+
+	t = lge_devs;
+
+	while(t->lge_name != NULL) {
+		if ((pci_get_vendor(dev) == t->lge_vid) &&
+		    (pci_get_device(dev) == t->lge_did)) {
+			device_set_desc(dev, t->lge_name);
+			return(0);
+		}
+		t++;
+	}
+
+	return(ENXIO);
+}
+
+/*
+ * Attach the interface. Allocate softc structures, do ifmedia
+ * setup and ethernet/BPF attach.
+ */
+static int lge_attach(dev)
+	device_t		dev;
+{
+	int			s;
+	u_char			eaddr[ETHER_ADDR_LEN];
+	u_int32_t		command;
+	struct lge_softc	*sc;
+	struct ifnet		*ifp;
+	int			unit, error = 0, rid;
+
+	s = splimp();
+
+	sc = device_get_softc(dev);
+	unit = device_get_unit(dev);
+	bzero(sc, sizeof(struct lge_softc));
+
+	/*
+	 * Handle power management nonsense.
+	 */
+	if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
+		u_int32_t		iobase, membase, irq;
+
+		/* Save important PCI config data. */
+		iobase = pci_read_config(dev, LGE_PCI_LOIO, 4);
+		membase = pci_read_config(dev, LGE_PCI_LOMEM, 4);
+		irq = pci_read_config(dev, LGE_PCI_INTLINE, 4);
+
+		/* Reset the power state. */
+		printf("lge%d: chip is in D%d power mode "
+		    "-- setting to D0\n", unit,
+		    pci_get_powerstate(dev));
+		pci_set_powerstate(dev, PCI_POWERSTATE_D0);
+
+		/* Restore PCI config data. */
+		pci_write_config(dev, LGE_PCI_LOIO, iobase, 4);
+		pci_write_config(dev, LGE_PCI_LOMEM, membase, 4);
+		pci_write_config(dev, LGE_PCI_INTLINE, irq, 4);
+	}
+
+	/*
+	 * Map control/status registers.
+	 */
+	pci_enable_busmaster(dev);
+	pci_enable_io(dev, PCIM_CMD_PORTEN);
+	pci_enable_io(dev, PCIM_CMD_MEMEN);
+	command = pci_read_config(dev, PCIR_COMMAND, 4);
+
+#ifdef LGE_USEIOSPACE
+	if (!(command & PCIM_CMD_PORTEN)) {
+		printf("lge%d: failed to enable I/O ports!\n", unit);
+		error = ENXIO;;
+		goto fail;
+	}
+#else
+	if (!(command & PCIM_CMD_MEMEN)) {
+		printf("lge%d: failed to enable memory mapping!\n", unit);
+		error = ENXIO;;
+		goto fail;
+	}
+#endif
+
+	rid = LGE_RID;
+	sc->lge_res = bus_alloc_resource(dev, LGE_RES, &rid,
+	    0, ~0, 1, RF_ACTIVE);
+
+	if (sc->lge_res == NULL) {
+		printf("lge%d: couldn't map ports/memory\n", unit);
+		error = ENXIO;
+		goto fail;
+	}
+
+	sc->lge_btag = rman_get_bustag(sc->lge_res);
+	sc->lge_bhandle = rman_get_bushandle(sc->lge_res);
+
+	/* Allocate interrupt */
+	rid = 0;
+	sc->lge_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
+	    RF_SHAREABLE | RF_ACTIVE);
+
+	if (sc->lge_irq == NULL) {
+		printf("lge%d: couldn't map interrupt\n", unit);
+		bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);
+		error = ENXIO;
+		goto fail;
+	}
+
+	error = bus_setup_intr(dev, sc->lge_irq, INTR_TYPE_NET,
+	    lge_intr, sc, &sc->lge_intrhand);
+
+	if (error) {
+		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lge_irq);
+		bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);
+		printf("lge%d: couldn't set up irq\n", unit);
+		goto fail;
+	}
+
+	/* Reset the adapter. */
+	lge_reset(sc);
+
+	/*
+	 * Get station address from the EEPROM.
+	 */
+	lge_read_eeprom(sc, (caddr_t)&eaddr[0], LGE_EE_NODEADDR_0, 1, 0);
+	lge_read_eeprom(sc, (caddr_t)&eaddr[2], LGE_EE_NODEADDR_1, 1, 0);
+	lge_read_eeprom(sc, (caddr_t)&eaddr[4], LGE_EE_NODEADDR_2, 1, 0);
+
+	/*
+	 * A Level 1 chip was detected. Inform the world.
+	 */
+	printf("lge%d: Ethernet address: %6D\n", unit, eaddr, ":");
+
+	sc->lge_unit = unit;
+	callout_handle_init(&sc->lge_stat_ch);
+	bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
+
+	sc->lge_ldata = contigmalloc(sizeof(struct lge_list_data), M_DEVBUF,
+	    M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
+
+	if (sc->lge_ldata == NULL) {
+		printf("lge%d: no memory for list buffers!\n", unit);
+		bus_teardown_intr(dev, sc->lge_irq, sc->lge_intrhand);
+		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lge_irq);
+		bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);
+		error = ENXIO;
+		goto fail;
+	}
+	bzero(sc->lge_ldata, sizeof(struct lge_list_data));
+
+	/* Try to allocate memory for jumbo buffers. */
+	if (lge_alloc_jumbo_mem(sc)) {
+		printf("lge%d: jumbo buffer allocation failed\n",
+                    sc->lge_unit);
+		contigfree(sc->lge_ldata,
+		    sizeof(struct lge_list_data), M_DEVBUF);
+		bus_teardown_intr(dev, sc->lge_irq, sc->lge_intrhand);
+		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lge_irq);
+		bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);
+		error = ENXIO;
+		goto fail;
+	}
+
+	ifp = &sc->arpcom.ac_if;
+	ifp->if_softc = sc;
+	ifp->if_unit = unit;
+	ifp->if_name = "lge";
+	ifp->if_mtu = ETHERMTU;
+	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+	ifp->if_ioctl = lge_ioctl;
+	ifp->if_output = ether_output;
+	ifp->if_start = lge_start;
+	ifp->if_watchdog = lge_watchdog;
+	ifp->if_init = lge_init;
+	ifp->if_baudrate = 1000000000;
+	ifp->if_snd.ifq_maxlen = LGE_TX_LIST_CNT - 1;
+
+	if (CSR_READ_4(sc, LGE_GMIIMODE) & LGE_GMIIMODE_PCSENH)
+		sc->lge_pcs = 1;
+	else
+		sc->lge_pcs = 0;
+
+	/*
+	 * Do MII setup.
+	 */
+	if (mii_phy_probe(dev, &sc->lge_miibus,
+	    lge_ifmedia_upd, lge_ifmedia_sts)) {
+		printf("lge%d: MII without any PHY!\n", sc->lge_unit);
+		contigfree(sc->lge_ldata,
+		    sizeof(struct lge_list_data), M_DEVBUF);
+		lge_free_jumbo_mem(sc);
+		bus_teardown_intr(dev, sc->lge_irq, sc->lge_intrhand);
+		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lge_irq);
+		bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);
+		error = ENXIO;
+		goto fail;
+	}
+
+	/*
+	 * Call MI attach routine.
+	 */
+	ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
+	callout_handle_init(&sc->lge_stat_ch);
+
+fail:
+	splx(s);
+	return(error);
+}
+
+static int lge_detach(dev)
+	device_t		dev;
+{
+	struct lge_softc	*sc;
+	struct ifnet		*ifp;
+	int			s;
+
+	s = splimp();
+
+	sc = device_get_softc(dev);
+	ifp = &sc->arpcom.ac_if;
+
+	lge_reset(sc);
+	lge_stop(sc);
+	ether_ifdetach(ifp, ETHER_BPF_SUPPORTED);
+
+	bus_generic_detach(dev);
+	device_delete_child(dev, sc->lge_miibus);
+
+	bus_teardown_intr(dev, sc->lge_irq, sc->lge_intrhand);
+	bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lge_irq);
+	bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);
+
+	contigfree(sc->lge_ldata, sizeof(struct lge_list_data), M_DEVBUF);
+	lge_free_jumbo_mem(sc);
+	contigfree(sc->lge_cdata.lge_jumbo_buf, LGE_JMEM, M_DEVBUF);
+
+	splx(s);
+
+	return(0);
+}
+
+/*
+ * Initialize the transmit descriptors.
+ */
+static int lge_list_tx_init(sc)
+	struct lge_softc	*sc;
+{
+	struct lge_list_data	*ld;
+	struct lge_ring_data	*cd;
+	int			i;
+
+	cd = &sc->lge_cdata;
+	ld = sc->lge_ldata;
+	for (i = 0; i < LGE_TX_LIST_CNT; i++) {
+		ld->lge_tx_list[i].lge_mbuf = NULL;
+		ld->lge_tx_list[i].lge_ctl = 0;
+	}
+
+	cd->lge_tx_prod = cd->lge_tx_cons = 0;
+
+	return(0);
+}
+
+
+/*
+ * Initialize the RX descriptors and allocate mbufs for them. Note that
+ * we arralge the descriptors in a closed ring, so that the last descriptor
+ * points back to the first.
+ */
+static int lge_list_rx_init(sc)
+	struct lge_softc	*sc;
+{
+	struct lge_list_data	*ld;
+	struct lge_ring_data	*cd;
+	int			i;
+
+	ld = sc->lge_ldata;
+	cd = &sc->lge_cdata;
+
+	cd->lge_rx_prod = cd->lge_rx_cons = 0;
+
+	CSR_WRITE_4(sc, LGE_RXDESC_ADDR_HI, 0);
+
+	for (i = 0; i < LGE_RX_LIST_CNT; i++) {
+		if (CSR_READ_1(sc, LGE_RXCMDFREE_8BIT) == 0)
+			break;
+		if (lge_newbuf(sc, &ld->lge_rx_list[i], NULL) == ENOBUFS)
+			return(ENOBUFS);
+	}
+
+	/* Clear possible 'rx command queue empty' interrupt. */
+	CSR_READ_4(sc, LGE_ISR);
+
+	return(0);
+}
+
+/*
+ * Initialize an RX descriptor and attach an MBUF cluster.
+ */
+static int lge_newbuf(sc, c, m)
+	struct lge_softc	*sc;
+	struct lge_rx_desc	*c;
+	struct mbuf		*m;
+{
+	struct mbuf		*m_new = NULL;
+	caddr_t			*buf = NULL;
+
+	if (m == NULL) {
+		MGETHDR(m_new, M_DONTWAIT, MT_DATA);
+		if (m_new == NULL) {
+			printf("lge%d: no memory for rx list "
+			    "-- packet dropped!\n", sc->lge_unit);
+			return(ENOBUFS);
+		}
+
+		/* Allocate the jumbo buffer */
+		buf = lge_jalloc(sc);
+		if (buf == NULL) {
+#ifdef LGE_VERBOSE
+			printf("lge%d: jumbo allocation failed "
+			    "-- packet dropped!\n", sc->lge_unit);
+#endif
+			m_freem(m_new);
+			return(ENOBUFS);
+		}
+		/* Attach the buffer to the mbuf */
+		m_new->m_data = (void *)buf;
+		m_new->m_len = m_new->m_pkthdr.len = LGE_MCLBYTES;
+		MEXTADD(m_new, buf, LGE_MCLBYTES, lge_jfree,
+		    (struct lge_softc *)sc, 0, EXT_NET_DRV);
+	} else {
+		m_new = m;
+		m_new->m_len = m_new->m_pkthdr.len = LGE_MCLBYTES;
+		m_new->m_data = m_new->m_ext.ext_buf;
+	}
+
+	/*
+	 * Adjust alignment so packet payload begins on a
+	 * longword boundary. Mandatory for Alpha, useful on
+	 * x86 too.
+	*/
+	m_adj(m_new, ETHER_ALIGN);
+
+	c->lge_mbuf = m_new;
+	c->lge_fragptr_hi = 0;
+	c->lge_fragptr_lo = vtophys(mtod(m_new, caddr_t));
+	c->lge_fraglen = m_new->m_len;
+	c->lge_ctl = m_new->m_len | LGE_RXCTL_WANTINTR | LGE_FRAGCNT(1);
+	c->lge_sts = 0;
+
+	/*
+	 * Put this buffer in the RX command FIFO. To do this,
+	 * we just write the physical address of the descriptor
+	 * into the RX descriptor address registers. Note that
+	 * there are two registers, one high DWORD and one low
+	 * DWORD, which lets us specify a 64-bit address if
+	 * desired. We only use a 32-bit address for now.
+	 * Writing to the low DWORD register is what actually
+	 * causes the command to be issued, so we do that
+	 * last.
+	 */
+	CSR_WRITE_4(sc, LGE_RXDESC_ADDR_LO, vtophys(c));
+	LGE_INC(sc->lge_cdata.lge_rx_prod, LGE_RX_LIST_CNT);
+
+	return(0);
+}
+
+static int lge_alloc_jumbo_mem(sc)
+	struct lge_softc	*sc;
+{
+	caddr_t			ptr;
+	register int		i;
+	struct lge_jpool_entry   *entry;
+
+	/* Grab a big chunk o' storage. */
+	sc->lge_cdata.lge_jumbo_buf = contigmalloc(LGE_JMEM, M_DEVBUF,
+	    M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
+
+	if (sc->lge_cdata.lge_jumbo_buf == NULL) {
+		printf("lge%d: no memory for jumbo buffers!\n", sc->lge_unit);
+		return(ENOBUFS);
+	}
+
+	SLIST_INIT(&sc->lge_jfree_listhead);
+	SLIST_INIT(&sc->lge_jinuse_listhead);
+
+	/*
+	 * Now divide it up into 9K pieces and save the addresses
+	 * in an array.
+	 */
+	ptr = sc->lge_cdata.lge_jumbo_buf;
+	for (i = 0; i < LGE_JSLOTS; i++) {
+		sc->lge_cdata.lge_jslots[i] = ptr;
+		ptr += LGE_MCLBYTES;
+		entry = malloc(sizeof(struct lge_jpool_entry), 
+		    M_DEVBUF, M_NOWAIT);
+		if (entry == NULL) {
+			free(sc->lge_cdata.lge_jumbo_buf, M_DEVBUF);
+			sc->lge_cdata.lge_jumbo_buf = NULL;
+			printf("lge%d: no memory for jumbo "
+			    "buffer queue!\n", sc->lge_unit);
+			return(ENOBUFS);
+		}
+		entry->slot = i;
+		SLIST_INSERT_HEAD(&sc->lge_jfree_listhead,
+		    entry, jpool_entries);
+	}
+
+	return(0);
+}
+
+static void lge_free_jumbo_mem(sc)
+	struct lge_softc	*sc;
+{
+	int			i;
+	struct lge_jpool_entry	*entry;
+
+	for (i = 0; i < LGE_JSLOTS; i++) {
+		entry = SLIST_FIRST(&sc->lge_jfree_listhead);
+		free(entry, M_DEVBUF);
+		SLIST_REMOVE_HEAD(&sc->lge_jfree_listhead, jpool_entries);
+	}
+
+	contigfree(sc->lge_cdata.lge_jumbo_buf, LGE_JMEM, M_DEVBUF);
+
+	return;
+}
+
+/*
+ * Allocate a jumbo buffer.
+ */
+static void *lge_jalloc(sc)
+	struct lge_softc	*sc;
+{
+	struct lge_jpool_entry   *entry;
+	
+	entry = SLIST_FIRST(&sc->lge_jfree_listhead);
+	
+	if (entry == NULL) {
+#ifdef LGE_VERBOSE
+		printf("lge%d: no free jumbo buffers\n", sc->lge_unit);
+#endif
+		return(NULL);
+	}
+
+	SLIST_REMOVE_HEAD(&sc->lge_jfree_listhead, jpool_entries);
+	SLIST_INSERT_HEAD(&sc->lge_jinuse_listhead, entry, jpool_entries);
+	return(sc->lge_cdata.lge_jslots[entry->slot]);
+}
+
+/*
+ * Release a jumbo buffer.
+ */
+static void lge_jfree(buf, args)
+	caddr_t			buf;
+	void			*args;
+{
+	struct lge_softc	*sc;
+	int		        i;
+	struct lge_jpool_entry   *entry;
+
+	/* Extract the softc struct pointer. */
+	sc = args;
+
+	if (sc == NULL)
+		panic("lge_jfree: can't find softc pointer!");
+
+	/* calculate the slot this buffer belongs to */
+	i = ((vm_offset_t)buf
+	     - (vm_offset_t)sc->lge_cdata.lge_jumbo_buf) / LGE_JLEN;
+
+	if ((i < 0) || (i >= LGE_JSLOTS))
+		panic("lge_jfree: asked to free buffer that we don't manage!");
+
+	entry = SLIST_FIRST(&sc->lge_jinuse_listhead);
+	if (entry == NULL)
+		panic("lge_jfree: buffer not in use!");
+	entry->slot = i;
+	SLIST_REMOVE_HEAD(&sc->lge_jinuse_listhead, jpool_entries);
+	SLIST_INSERT_HEAD(&sc->lge_jfree_listhead, entry, jpool_entries);
+
+	return;
+}
+
+/*
+ * A frame has been uploaded: pass the resulting mbuf chain up to
+ * the higher level protocols.
+ */
+static void lge_rxeof(sc, cnt)
+	struct lge_softc	*sc;
+	int			cnt;
+{
+        struct ether_header	*eh;
+        struct mbuf		*m;
+        struct ifnet		*ifp;
+	struct lge_rx_desc	*cur_rx;
+	int			c, i, total_len = 0;
+	u_int32_t		rxsts, rxctl;
+
+	ifp = &sc->arpcom.ac_if;
+
+	/* Find out how many frames were processed. */
+	c = cnt;
+	i = sc->lge_cdata.lge_rx_cons;
+
+	/* Suck them in. */
+	while(c) {
+		struct mbuf		*m0 = NULL;
+
+		cur_rx = &sc->lge_ldata->lge_rx_list[i];
+		rxctl = cur_rx->lge_ctl;
+		rxsts = cur_rx->lge_sts;
+		m = cur_rx->lge_mbuf;
+		cur_rx->lge_mbuf = NULL;
+		total_len = LGE_RXBYTES(cur_rx);
+		LGE_INC(i, LGE_RX_LIST_CNT);
+		c--;
+
+		/*
+		 * If an error occurs, update stats, clear the
+		 * status word and leave the mbuf cluster in place:
+		 * it should simply get re-used next time this descriptor
+	 	 * comes up in the ring.
+		 */
+		if (rxctl & LGE_RXCTL_ERRMASK) {
+			ifp->if_ierrors++;
+			lge_newbuf(sc, &LGE_RXTAIL(sc), m);
+			continue;
+		}
+
+		if (lge_newbuf(sc, &LGE_RXTAIL(sc), NULL) == ENOBUFS) {
+			m0 = m_devget(mtod(m, char *) - ETHER_ALIGN,
+			    total_len + ETHER_ALIGN, 0, ifp, NULL);
+			lge_newbuf(sc, &LGE_RXTAIL(sc), m);
+			if (m0 == NULL) {
+				printf("lge%d: no receive buffers "
+				    "available -- packet dropped!\n",
+				    sc->lge_unit);
+				ifp->if_ierrors++;
+				continue;
+			}
+			m_adj(m0, ETHER_ALIGN);
+			m = m0;
+		} else {
+			m->m_pkthdr.rcvif = ifp;
+			m->m_pkthdr.len = m->m_len = total_len;
+		}
+
+		ifp->if_ipackets++;
+		eh = mtod(m, struct ether_header *);
+
+		/* Remove header from mbuf and pass it on. */
+		m_adj(m, sizeof(struct ether_header));
+
+		/* Do IP checksum checking. */
+		if (rxsts & LGE_RXSTS_ISIP)
+			m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
+		if (!(rxsts & LGE_RXSTS_IPCSUMERR))
+			m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
+		if ((rxsts & LGE_RXSTS_ISTCP &&
+		    !(rxsts & LGE_RXSTS_TCPCSUMERR)) ||
+		    (rxsts & LGE_RXSTS_ISUDP &&
+		    !(rxsts & LGE_RXSTS_UDPCSUMERR))) {
+			m->m_pkthdr.csum_flags |=
+			    CSUM_DATA_VALID|CSUM_PSEUDO_HDR;
+			m->m_pkthdr.csum_data = 0;
+		}
+
+		ether_input(ifp, eh, m);
+	}
+
+	sc->lge_cdata.lge_rx_cons = i;
+
+	return;
+}
+
+void lge_rxeoc(sc)
+	struct lge_softc	*sc;
+{
+	struct ifnet		*ifp;
+
+	ifp = &sc->arpcom.ac_if;
+	ifp->if_flags &= ~IFF_RUNNING;
+	lge_init(sc);
+	return;
+}
+
+/*
+ * A frame was downloaded to the chip. It's safe for us to clean up
+ * the list buffers.
+ */
+
+static void lge_txeof(sc)
+	struct lge_softc	*sc;
+{
+	struct lge_tx_desc	*cur_tx = NULL;
+	struct ifnet		*ifp;
+	u_int32_t		idx, txdone;
+
+	ifp = &sc->arpcom.ac_if;
+
+	/* Clear the timeout timer. */
+	ifp->if_timer = 0;
+
+	/*
+	 * Go through our tx list and free mbufs for those
+	 * frames that have been transmitted.
+	 */
+	idx = sc->lge_cdata.lge_tx_cons;
+	txdone = CSR_READ_1(sc, LGE_TXDMADONE_8BIT);
+
+	while (idx != sc->lge_cdata.lge_tx_prod && txdone) {
+		cur_tx = &sc->lge_ldata->lge_tx_list[idx];
+
+		ifp->if_opackets++;
+		if (cur_tx->lge_mbuf != NULL) {
+			m_freem(cur_tx->lge_mbuf);
+			cur_tx->lge_mbuf = NULL;
+		}
+		cur_tx->lge_ctl = 0;
+
+		txdone--;
+		LGE_INC(idx, LGE_TX_LIST_CNT);
+		ifp->if_timer = 0;
+	}
+
+	sc->lge_cdata.lge_tx_cons = idx;
+
+	if (cur_tx != NULL)
+		ifp->if_flags &= ~IFF_OACTIVE;
+
+	return;
+}
+
+static void lge_tick(xsc)
+	void			*xsc;
+{
+	struct lge_softc	*sc;
+	struct mii_data		*mii;
+	struct ifnet		*ifp;
+	int			s;
+
+	s = splimp();
+
+	sc = xsc;
+	ifp = &sc->arpcom.ac_if;
+
+	CSR_WRITE_4(sc, LGE_STATSIDX, LGE_STATS_SINGLE_COLL_PKTS);
+	ifp->if_collisions += CSR_READ_4(sc, LGE_STATSVAL);
+	CSR_WRITE_4(sc, LGE_STATSIDX, LGE_STATS_MULTI_COLL_PKTS);
+	ifp->if_collisions += CSR_READ_4(sc, LGE_STATSVAL);
+
+	if (!sc->lge_link) {
+		mii = device_get_softc(sc->lge_miibus);
+		mii_tick(mii);
+		mii_pollstat(mii);
+		if (mii->mii_media_status & IFM_ACTIVE &&
+		    IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
+			sc->lge_link++;
+			if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_SX||
+			    IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_TX)
+				printf("lge%d: gigabit link up\n",
+				    sc->lge_unit);
+			if (ifp->if_snd.ifq_head != NULL)
+				lge_start(ifp);
+		}
+	}
+
+	sc->lge_stat_ch = timeout(lge_tick, sc, hz);
+
+	splx(s);
+
+	return;
+}
+
+static void lge_intr(arg)
+	void			*arg;
+{
+	struct lge_softc	*sc;
+	struct ifnet		*ifp;
+	u_int32_t		status;
+
+	sc = arg;
+	ifp = &sc->arpcom.ac_if;
+
+	/* Supress unwanted interrupts */
+	if (!(ifp->if_flags & IFF_UP)) {
+		lge_stop(sc);
+		return;
+	}
+
+	for (;;) {
+		/*
+		 * Reading the ISR register clears all interrupts, and
+		 * clears the 'interrupts enabled' bit in the IMR
+		 * register.
+		 */
+		status = CSR_READ_4(sc, LGE_ISR);
+
+		if ((status & LGE_INTRS) == 0)
+			break;
+
+		if ((status & (LGE_ISR_TXCMDFIFO_EMPTY|LGE_ISR_TXDMA_DONE)))
+			lge_txeof(sc);
+
+		if (status & LGE_ISR_RXDMA_DONE)
+			lge_rxeof(sc, LGE_RX_DMACNT(status));
+
+		if (status & LGE_ISR_RXCMDFIFO_EMPTY)
+			lge_rxeoc(sc);
+
+		if (status & LGE_ISR_PHY_INTR) {
+			sc->lge_link = 0;
+			untimeout(lge_tick, sc, sc->lge_stat_ch);
+			lge_tick(sc);
+		}
+	}
+
+	/* Re-enable interrupts. */
+	CSR_WRITE_4(sc, LGE_IMR, LGE_IMR_SETRST_CTL0|LGE_IMR_INTR_ENB);
+
+	if (ifp->if_snd.ifq_head != NULL)
+		lge_start(ifp);
+
+	return;
+}
+
+/*
+ * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
+ * pointers to the fragment pointers.
+ */
+static int lge_encap(sc, m_head, txidx)
+	struct lge_softc	*sc;
+	struct mbuf		*m_head;
+	u_int32_t		*txidx;
+{
+	struct lge_frag		*f = NULL;
+	struct lge_tx_desc	*cur_tx;
+	struct mbuf		*m;
+	int			frag = 0, tot_len = 0;
+
+	/*
+ 	 * Start packing the mbufs in this chain into
+	 * the fragment pointers. Stop when we run out
+ 	 * of fragments or hit the end of the mbuf chain.
+	 */
+	m = m_head;
+	cur_tx = &sc->lge_ldata->lge_tx_list[*txidx];
+	frag = 0;
+
+	for (m = m_head; m != NULL; m = m->m_next) {
+		if (m->m_len != 0) {
+			tot_len += m->m_len;
+			f = &cur_tx->lge_frags[frag];
+			f->lge_fraglen = m->m_len;
+			f->lge_fragptr_lo = vtophys(mtod(m, vm_offset_t));
+			f->lge_fragptr_hi = 0;
+			frag++;
+		}
+	}
+
+	if (m != NULL)
+		return(ENOBUFS);
+
+	cur_tx->lge_mbuf = m_head;
+	cur_tx->lge_ctl = LGE_TXCTL_WANTINTR|LGE_FRAGCNT(frag)|tot_len;
+	(*txidx)++;
+
+	/* Queue for transmit */
+	CSR_WRITE_4(sc, LGE_TXDESC_ADDR_LO, vtophys(cur_tx));
+
+	return(0);
+}
+
+/*
+ * Main transmit routine. To avoid having to do mbuf copies, we put pointers
+ * to the mbuf data regions directly in the transmit lists. We also save a
+ * copy of the pointers since the transmit list fragment pointers are
+ * physical addresses.
+ */
+
+static void lge_start(ifp)
+	struct ifnet		*ifp;
+{
+	struct lge_softc	*sc;
+	struct mbuf		*m_head = NULL;
+	u_int32_t		idx;
+
+	sc = ifp->if_softc;
+
+	if (!sc->lge_link)
+		return;
+
+	idx = sc->lge_cdata.lge_tx_prod;
+
+	if (ifp->if_flags & IFF_OACTIVE)
+		return;
+
+	while(sc->lge_ldata->lge_tx_list[idx].lge_mbuf == NULL) {
+		if (CSR_READ_1(sc, LGE_TXCMDFREE_8BIT) == 0)
+			break;
+
+		IF_DEQUEUE(&ifp->if_snd, m_head);
+		if (m_head == NULL)
+			break;
+
+		if (lge_encap(sc, m_head, &idx)) {
+			IF_PREPEND(&ifp->if_snd, m_head);
+			ifp->if_flags |= IFF_OACTIVE;
+			break;
+		}
+
+		/*
+		 * If there's a BPF listener, bounce a copy of this frame
+		 * to him.
+		 */
+		if (ifp->if_bpf)
+			bpf_mtap(ifp, m_head);
+	}
+
+	sc->lge_cdata.lge_tx_prod = idx;
+
+	/*
+	 * Set a timeout in case the chip goes out to lunch.
+	 */
+	ifp->if_timer = 5;
+
+	return;
+}
+
+static void lge_init(xsc)
+	void			*xsc;
+{
+	struct lge_softc	*sc = xsc;
+	struct ifnet		*ifp = &sc->arpcom.ac_if;
+	struct mii_data		*mii;
+	int			s;
+
+	if (ifp->if_flags & IFF_RUNNING)
+		return;
+
+	s = splimp();
+
+	/*
+	 * Cancel pending I/O and free all RX/TX buffers.
+	 */
+	lge_stop(sc);
+	lge_reset(sc);
+
+	mii = device_get_softc(sc->lge_miibus);
+
+	/* Set MAC address */
+	CSR_WRITE_4(sc, LGE_PAR0, *(u_int32_t *)(&sc->arpcom.ac_enaddr[0]));
+	CSR_WRITE_4(sc, LGE_PAR1, *(u_int32_t *)(&sc->arpcom.ac_enaddr[4]));
+
+	/* Init circular RX list. */
+	if (lge_list_rx_init(sc) == ENOBUFS) {
+		printf("lge%d: initialization failed: no "
+		    "memory for rx buffers\n", sc->lge_unit);
+		lge_stop(sc);
+		(void)splx(s);
+		return;
+	}
+
+	/*
+	 * Init tx descriptors.
+	 */
+	lge_list_tx_init(sc);
+
+	/* Set initial value for MODE1 register. */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_RX_UCAST|
+	    LGE_MODE1_TX_CRC|LGE_MODE1_TXPAD|
+	    LGE_MODE1_RX_FLOWCTL|LGE_MODE1_SETRST_CTL0|
+	    LGE_MODE1_SETRST_CTL1|LGE_MODE1_SETRST_CTL2);
+
+	 /* If we want promiscuous mode, set the allframes bit. */
+	if (ifp->if_flags & IFF_PROMISC) {
+		CSR_WRITE_4(sc, LGE_MODE1,
+		    LGE_MODE1_SETRST_CTL1|LGE_MODE1_RX_PROMISC);
+	} else {
+		CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_RX_PROMISC);
+	}
+
+	/*
+	 * Set the capture broadcast bit to capture broadcast frames.
+	 */
+	if (ifp->if_flags & IFF_BROADCAST) {
+		CSR_WRITE_4(sc, LGE_MODE1,
+		    LGE_MODE1_SETRST_CTL1|LGE_MODE1_RX_BCAST);
+	} else {
+		CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_RX_BCAST);
+	}
+
+	/* Packet padding workaround? */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_SETRST_CTL1|LGE_MODE1_RMVPAD);
+
+	/* No error frames */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_RX_ERRPKTS);
+
+	/* Receive large frames */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_SETRST_CTL1|LGE_MODE1_RX_GIANTS);
+
+	/* Workaround: disable RX/TX flow control */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_TX_FLOWCTL);
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_RX_FLOWCTL);
+
+	/* Make sure to strip CRC from received frames */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_RX_CRC);
+
+	/* Turn off magic packet mode */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_MPACK_ENB);
+
+	/* Turn off all VLAN stuff */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_VLAN_RX|LGE_MODE1_VLAN_TX|
+	    LGE_MODE1_VLAN_STRIP|LGE_MODE1_VLAN_INSERT);
+
+	/* Workarond: FIFO overflow */
+	CSR_WRITE_2(sc, LGE_RXFIFO_HIWAT, 0x3FFF);
+	CSR_WRITE_4(sc, LGE_IMR, LGE_IMR_SETRST_CTL1|LGE_IMR_RXFIFO_WAT);
+
+	/*
+	 * Load the multicast filter.
+	 */
+	lge_setmulti(sc);
+
+	/*
+	 * Enable hardware checksum validation for all received IPv4
+	 * packets, do not reject packets with bad checksums.
+	 */
+	CSR_WRITE_4(sc, LGE_MODE2, LGE_MODE2_RX_IPCSUM|
+	    LGE_MODE2_RX_TCPCSUM|LGE_MODE2_RX_UDPCSUM|
+	    LGE_MODE2_RX_ERRCSUM);
+
+	/*
+	 * Enable the delivery of PHY interrupts based on
+	 * link/speed/duplex status chalges.
+	 */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_SETRST_CTL0|LGE_MODE1_GMIIPOLL);
+
+	/* Enable receiver and transmitter. */
+	CSR_WRITE_4(sc, LGE_RXDESC_ADDR_HI, 0);
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_SETRST_CTL1|LGE_MODE1_RX_ENB);
+
+	CSR_WRITE_4(sc, LGE_TXDESC_ADDR_HI, 0);
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_SETRST_CTL1|LGE_MODE1_TX_ENB);
+
+	/*
+	 * Enable interrupts.
+	 */
+	CSR_WRITE_4(sc, LGE_IMR, LGE_IMR_SETRST_CTL0|
+	    LGE_IMR_SETRST_CTL1|LGE_IMR_INTR_ENB|LGE_INTRS);
+
+	lge_ifmedia_upd(ifp);
+
+	ifp->if_flags |= IFF_RUNNING;
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+	(void)splx(s);
+
+	sc->lge_stat_ch = timeout(lge_tick, sc, hz);
+
+	return;
+}
+
+/*
+ * Set media options.
+ */
+static int lge_ifmedia_upd(ifp)
+	struct ifnet		*ifp;
+{
+	struct lge_softc	*sc;
+	struct mii_data		*mii;
+
+	sc = ifp->if_softc;
+
+	mii = device_get_softc(sc->lge_miibus);
+	sc->lge_link = 0;
+	if (mii->mii_instance) {
+		struct mii_softc	*miisc;
+		for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL;
+		    miisc = LIST_NEXT(miisc, mii_list))
+			mii_phy_reset(miisc);
+	}
+	mii_mediachg(mii);
+
+	return(0);
+}
+
+/*
+ * Report current media status.
+ */
+static void lge_ifmedia_sts(ifp, ifmr)
+	struct ifnet		*ifp;
+	struct ifmediareq	*ifmr;
+{
+	struct lge_softc	*sc;
+	struct mii_data		*mii;
+
+	sc = ifp->if_softc;
+
+	mii = device_get_softc(sc->lge_miibus);
+	mii_pollstat(mii);
+	ifmr->ifm_active = mii->mii_media_active;
+	ifmr->ifm_status = mii->mii_media_status;
+
+	return;
+}
+
+static int lge_ioctl(ifp, command, data)
+	struct ifnet		*ifp;
+	u_long			command;
+	caddr_t			data;
+{
+	struct lge_softc	*sc = ifp->if_softc;
+	struct ifreq		*ifr = (struct ifreq *) data;
+	struct mii_data		*mii;
+	int			s, error = 0;
+
+	s = splimp();
+
+	switch(command) {
+	case SIOCSIFADDR:
+	case SIOCGIFADDR:
+		error = ether_ioctl(ifp, command, data);
+		break;
+	case SIOCSIFMTU:
+		if (ifr->ifr_mtu > LGE_JUMBO_MTU)
+			error = EINVAL;
+		else
+			ifp->if_mtu = ifr->ifr_mtu;
+		break;
+	case SIOCSIFFLAGS:
+		if (ifp->if_flags & IFF_UP) {
+			if (ifp->if_flags & IFF_RUNNING &&
+			    ifp->if_flags & IFF_PROMISC &&
+			    !(sc->lge_if_flags & IFF_PROMISC)) {
+				CSR_WRITE_4(sc, LGE_MODE1,
+				    LGE_MODE1_SETRST_CTL1|
+				    LGE_MODE1_RX_PROMISC);
+			} else if (ifp->if_flags & IFF_RUNNING &&
+			    !(ifp->if_flags & IFF_PROMISC) &&
+			    sc->lge_if_flags & IFF_PROMISC) {
+				CSR_WRITE_4(sc, LGE_MODE1,
+				    LGE_MODE1_RX_PROMISC);
+			} else {
+				ifp->if_flags &= ~IFF_RUNNING;
+				lge_init(sc);
+			}
+		} else {
+			if (ifp->if_flags & IFF_RUNNING)
+				lge_stop(sc);
+		}
+		sc->lge_if_flags = ifp->if_flags;
+		error = 0;
+		break;
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+		lge_setmulti(sc);
+		error = 0;
+		break;
+	case SIOCGIFMEDIA:
+	case SIOCSIFMEDIA:
+		mii = device_get_softc(sc->lge_miibus);
+		error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+
+	(void)splx(s);
+
+	return(error);
+}
+
+static void lge_watchdog(ifp)
+	struct ifnet		*ifp;
+{
+	struct lge_softc	*sc;
+
+	sc = ifp->if_softc;
+
+	ifp->if_oerrors++;
+	printf("lge%d: watchdog timeout\n", sc->lge_unit);
+
+	lge_stop(sc);
+	lge_reset(sc);
+	ifp->if_flags &= ~IFF_RUNNING;
+	lge_init(sc);
+
+	if (ifp->if_snd.ifq_head != NULL)
+		lge_start(ifp);
+
+	return;
+}
+
+/*
+ * Stop the adapter and free any mbufs allocated to the
+ * RX and TX lists.
+ */
+static void lge_stop(sc)
+	struct lge_softc	*sc;
+{
+	register int		i;
+	struct ifnet		*ifp;
+
+	ifp = &sc->arpcom.ac_if;
+	ifp->if_timer = 0;
+	untimeout(lge_tick, sc, sc->lge_stat_ch);
+	CSR_WRITE_4(sc, LGE_IMR, LGE_IMR_INTR_ENB);
+
+	/* Disable receiver and transmitter. */
+	CSR_WRITE_4(sc, LGE_MODE1, LGE_MODE1_RX_ENB|LGE_MODE1_TX_ENB);
+	sc->lge_link = 0;
+
+	/*
+	 * Free data in the RX lists.
+	 */
+	for (i = 0; i < LGE_RX_LIST_CNT; i++) {
+		if (sc->lge_ldata->lge_rx_list[i].lge_mbuf != NULL) {
+			m_freem(sc->lge_ldata->lge_rx_list[i].lge_mbuf);
+			sc->lge_ldata->lge_rx_list[i].lge_mbuf = NULL;
+		}
+	}
+	bzero((char *)&sc->lge_ldata->lge_rx_list,
+		sizeof(sc->lge_ldata->lge_rx_list));
+
+	/*
+	 * Free the TX list buffers.
+	 */
+	for (i = 0; i < LGE_TX_LIST_CNT; i++) {
+		if (sc->lge_ldata->lge_tx_list[i].lge_mbuf != NULL) {
+			m_freem(sc->lge_ldata->lge_tx_list[i].lge_mbuf);
+			sc->lge_ldata->lge_tx_list[i].lge_mbuf = NULL;
+		}
+	}
+
+	bzero((char *)&sc->lge_ldata->lge_tx_list,
+		sizeof(sc->lge_ldata->lge_tx_list));
+
+	ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
+
+	return;
+}
+
+/*
+ * Stop all chip I/O so that the kernel's probe routines don't
+ * get confused by errant DMAs when rebooting.
+ */
+static void lge_shutdown(dev)
+	device_t		dev;
+{
+	struct lge_softc	*sc;
+
+	sc = device_get_softc(dev);
+
+	lge_reset(sc);
+	lge_stop(sc);
+
+	return;
+}