/*
 * 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: src/sys/dev/lge/if_lge.c,v 1.5.2.2 2001/12/14 19:49:23 jlemon Exp $
 */

/*
 * 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/interrupt.h>
#include <sys/socket.h>
#include <sys/serialize.h>

#include <net/if.h>
#include <net/ifq_var.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 <sys/bus.h>
#include <sys/rman.h>

#include <dev/netif/mii_layer/mii.h>
#include <dev/netif/mii_layer/miivar.h>

#include "pcidevs.h"
#include <bus/pci/pcireg.h>
#include <bus/pci/pcivar.h>

#define LGE_USEIOSPACE

#include "if_lgereg.h"

/* "controller miibus0" required.  See GENERIC if you get errors here. */
#include "miibus_if.h"

/*
 * Various supported device vendors/types and their names.
 */
static struct lge_type lge_devs[] = {
	{ PCI_VENDOR_LEVELONE, PCI_PRODUCT_LEVELONE_LXT1001,
	    "Level 1 Gigabit Ethernet" },
	{ 0, 0, NULL }
};

static int	lge_probe(device_t);
static int	lge_attach(device_t);
static int	lge_detach(device_t);

static int	lge_alloc_jumbo_mem(struct lge_softc *);
static void	lge_free_jumbo_mem(struct lge_softc *);
static struct lge_jslot
		*lge_jalloc(struct lge_softc *);
static void	lge_jfree(void *);
static void	lge_jref(void *);

static int	lge_newbuf(struct lge_softc *, struct lge_rx_desc *,
			   struct mbuf *);
static int	lge_encap(struct lge_softc *, struct mbuf *, uint32_t *);
static void	lge_rxeof(struct lge_softc *, int);
static void	lge_rxeoc(struct lge_softc *);
static void	lge_txeof(struct lge_softc *);
static void	lge_intr(void *);
static void	lge_tick(void *);
static void	lge_tick_serialized(void *);
static void	lge_start(struct ifnet *, struct ifaltq_subque *);
static int	lge_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
static void	lge_init(void *);
static void	lge_stop(struct lge_softc *);
static void	lge_watchdog(struct ifnet *);
static void	lge_shutdown(device_t);
static int	lge_ifmedia_upd(struct ifnet *);
static void	lge_ifmedia_sts(struct ifnet *, struct ifmediareq *);

static void	lge_eeprom_getword(struct lge_softc *, int, uint16_t *);
static void	lge_read_eeprom(struct lge_softc *, caddr_t, int, int);

static int	lge_miibus_readreg(device_t, int, int);
static int	lge_miibus_writereg(device_t, int, int, int);
static void	lge_miibus_statchg(device_t);

static void	lge_setmulti(struct lge_softc *);
static void	lge_reset(struct lge_softc *);
static int	lge_list_rx_init(struct lge_softc *);
static int	lge_list_tx_init(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),

	DEVMETHOD_END
};

static DEFINE_CLASS_0(lge, lge_driver, lge_methods, sizeof(struct lge_softc));
static devclass_t lge_devclass;

DECLARE_DUMMY_MODULE(if_lge);
DRIVER_MODULE(if_lge, pci, lge_driver, lge_devclass, NULL, NULL);
DRIVER_MODULE(miibus, lge, miibus_driver, miibus_devclass, NULL, NULL);

#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(struct lge_softc *sc, int addr, uint16_t *dest)
{
	int i;
	uint32_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) == 0)
			break;
	}

	if (i == LGE_TIMEOUT) {
		kprintf("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;
}

/*
 * Read a sequence of words from the EEPROM.
 */
static void
lge_read_eeprom(struct lge_softc *sc, caddr_t dest, int off, int cnt)
{
	int i;
	uint16_t word = 0, *ptr;

	for (i = 0; i < cnt; i++) {
		lge_eeprom_getword(sc, off + i, &word);
		ptr = (uint16_t *)(dest + (i * 2));
		*ptr = ntohs(word);
	}
}

static int
lge_miibus_readreg(device_t dev, int phy, int reg)
{
	struct lge_softc *sc = device_get_softc(dev);
	int i;

	/*
	 * 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) == 0)
			break;
	}

	if (i == LGE_TIMEOUT) {
		kprintf("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(device_t dev, int phy, int reg, int data)
{
	struct lge_softc *sc = device_get_softc(dev);
	int i;

	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) == 0)
			break;
	}

	if (i == LGE_TIMEOUT) {
		kprintf("lge%d: PHY write timed out\n", sc->lge_unit);
		return(0);
	}

	return(0);
}

static void
lge_miibus_statchg(device_t dev)
{
	struct lge_softc *sc = device_get_softc(dev);
	struct mii_data *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_T:
	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);
}

static void
lge_setmulti(struct lge_softc *sc)
{
	struct ifnet *ifp = &sc->arpcom.ac_if;
	struct ifmultiaddr *ifma;
	uint32_t h = 0, hashes[2] = { 0, 0 };

	/* 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 = ether_crc32_be(LLADDR((struct sockaddr_dl *)
		    ifma->ifma_addr), ETHER_ADDR_LEN) >> 26;
		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(struct lge_softc *sc)
{
	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) == 0)
			break;
	}

	if (i == LGE_TIMEOUT)
		kprintf("lge%d: reset never completed\n", sc->lge_unit);

	/* Wait a little while for the chip to get its brains in order. */
	DELAY(1000);
}

/*
 * 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(device_t dev)
{
	struct lge_type *t;
	uint16_t vendor, product;

	vendor = pci_get_vendor(dev);
	product = pci_get_device(dev);

	for (t = lge_devs; t->lge_name != NULL; t++) {
		if (vendor == t->lge_vid && product == t->lge_did) {
			device_set_desc(dev, t->lge_name);
			return(0);
		}
	}

	return(ENXIO);
}

/*
 * Attach the interface. Allocate softc structures, do ifmedia
 * setup and ethernet/BPF attach.
 */
static int
lge_attach(device_t dev)
{
	uint8_t eaddr[ETHER_ADDR_LEN];
	struct lge_softc *sc;
	struct ifnet *ifp;
	int unit, error = 0, rid;

	sc = device_get_softc(dev);
	unit = device_get_unit(dev);
	callout_init(&sc->lge_stat_timer);
	lwkt_serialize_init(&sc->lge_jslot_serializer);

	/*
	 * Handle power management nonsense.
	 */
	if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
		uint32_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. */
		device_printf(dev, "chip is in %s power mode "
		    "-- setting to D0\n",
		    pci_powerstate_to_str(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);
	}

	pci_enable_busmaster(dev);

	rid = LGE_RID;
	sc->lge_res = bus_alloc_resource_any(dev, LGE_RES, &rid, RF_ACTIVE);

	if (sc->lge_res == NULL) {
		kprintf("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_any(dev, SYS_RES_IRQ, &rid,
	    RF_SHAREABLE | RF_ACTIVE);

	if (sc->lge_irq == NULL) {
		kprintf("lge%d: couldn't map interrupt\n", unit);
		error = ENXIO;
		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);
	lge_read_eeprom(sc, (caddr_t)&eaddr[2], LGE_EE_NODEADDR_1, 1);
	lge_read_eeprom(sc, (caddr_t)&eaddr[4], LGE_EE_NODEADDR_2, 1);

	sc->lge_unit = unit;

	sc->lge_ldata = contigmalloc(sizeof(struct lge_list_data), M_DEVBUF,
	    M_WAITOK | M_ZERO, 0, 0xffffffff, PAGE_SIZE, 0);

	if (sc->lge_ldata == NULL) {
		kprintf("lge%d: no memory for list buffers!\n", unit);
		error = ENXIO;
		goto fail;
	}

	/* Try to allocate memory for jumbo buffers. */
	if (lge_alloc_jumbo_mem(sc)) {
		kprintf("lge%d: jumbo buffer allocation failed\n",
                    sc->lge_unit);
		error = ENXIO;
		goto fail;
	}

	ifp = &sc->arpcom.ac_if;
	ifp->if_softc = sc;
	if_initname(ifp, "lge", unit);
	ifp->if_mtu = ETHERMTU;
	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
	ifp->if_ioctl = lge_ioctl;
	ifp->if_start = lge_start;
	ifp->if_watchdog = lge_watchdog;
	ifp->if_init = lge_init;
	ifp->if_baudrate = 1000000000;
	ifq_set_maxlen(&ifp->if_snd, LGE_TX_LIST_CNT - 1);
	ifq_set_ready(&ifp->if_snd);
	ifp->if_capabilities = IFCAP_RXCSUM;
	ifp->if_capenable = ifp->if_capabilities;

	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)) {
		kprintf("lge%d: MII without any PHY!\n", sc->lge_unit);
		error = ENXIO;
		goto fail;
	}

	/*
	 * Call MI attach routine.
	 */
	ether_ifattach(ifp, eaddr, NULL);

	ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->lge_irq));

	error = bus_setup_intr(dev, sc->lge_irq, INTR_MPSAFE,
			       lge_intr, sc, &sc->lge_intrhand, 
			       ifp->if_serializer);
	if (error) {
		ether_ifdetach(ifp);
		kprintf("lge%d: couldn't set up irq\n", unit);
		goto fail;
	}

	return(0);

fail:
	lge_detach(dev);
	return(error);
}

static int
lge_detach(device_t dev)
{
	struct lge_softc *sc= device_get_softc(dev);
	struct ifnet *ifp = &sc->arpcom.ac_if;

	if (device_is_attached(dev)) {
		lwkt_serialize_enter(ifp->if_serializer);
		lge_reset(sc);
		lge_stop(sc);
		bus_teardown_intr(dev, sc->lge_irq, sc->lge_intrhand);
		lwkt_serialize_exit(ifp->if_serializer);

		ether_ifdetach(ifp);
	}

	if (sc->lge_miibus)
		device_delete_child(dev, sc->lge_miibus);
	bus_generic_detach(dev);

	if (sc->lge_irq)
		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lge_irq);
	if (sc->lge_res)
		bus_release_resource(dev, LGE_RES, LGE_RID, sc->lge_res);

	if (sc->lge_ldata)
		contigfree(sc->lge_ldata, sizeof(struct lge_list_data),
			   M_DEVBUF);
	lge_free_jumbo_mem(sc);

	return(0);
}

/*
 * Initialize the transmit descriptors.
 */
static int
lge_list_tx_init(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(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(struct lge_softc *sc, struct lge_rx_desc *c, struct mbuf *m)
{
	struct mbuf *m_new = NULL;
	struct lge_jslot *buf;

	if (m == NULL) {
		MGETHDR(m_new, M_NOWAIT, MT_DATA);
		if (m_new == NULL) {
			kprintf("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
			kprintf("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_ext.ext_arg = buf;
		m_new->m_ext.ext_buf = buf->lge_buf;
		m_new->m_ext.ext_free = lge_jfree;
		m_new->m_ext.ext_ref = lge_jref;
		m_new->m_ext.ext_size = LGE_JUMBO_FRAMELEN;

		m_new->m_data = m_new->m_ext.ext_buf;
		m_new->m_flags |= M_EXT;
		m_new->m_len = m_new->m_pkthdr.len = m_new->m_ext.ext_size;
	} else {
		m_new = m;
		m_new->m_len = m_new->m_pkthdr.len = LGE_JLEN;
		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(struct lge_softc *sc)
{
	struct lge_jslot *entry;
	caddr_t ptr;
	int i;

	/* Grab a big chunk o' storage. */
	sc->lge_cdata.lge_jumbo_buf = contigmalloc(LGE_JMEM, M_DEVBUF,
	    M_WAITOK, 0, 0xffffffff, PAGE_SIZE, 0);

	if (sc->lge_cdata.lge_jumbo_buf == NULL) {
		kprintf("lge%d: no memory for jumbo buffers!\n", sc->lge_unit);
		return(ENOBUFS);
	}

	SLIST_INIT(&sc->lge_jfree_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++) {
		entry = &sc->lge_cdata.lge_jslots[i];
		entry->lge_sc = sc;
		entry->lge_buf = ptr;
		entry->lge_inuse = 0;
		entry->lge_slot = i;
		SLIST_INSERT_HEAD(&sc->lge_jfree_listhead, entry, jslot_link);
		ptr += LGE_JLEN;
	}

	return(0);
}

static void
lge_free_jumbo_mem(struct lge_softc *sc)
{
	if (sc->lge_cdata.lge_jumbo_buf)
		contigfree(sc->lge_cdata.lge_jumbo_buf, LGE_JMEM, M_DEVBUF);
}

/*
 * Allocate a jumbo buffer.
 */
static struct lge_jslot *
lge_jalloc(struct lge_softc *sc)
{
	struct lge_jslot *entry;

	lwkt_serialize_enter(&sc->lge_jslot_serializer);
	entry = SLIST_FIRST(&sc->lge_jfree_listhead);
	if (entry) {
		SLIST_REMOVE_HEAD(&sc->lge_jfree_listhead, jslot_link);
		entry->lge_inuse = 1;
	} else {
#ifdef LGE_VERBOSE
		kprintf("lge%d: no free jumbo buffers\n", sc->lge_unit);
#endif
	}
	lwkt_serialize_exit(&sc->lge_jslot_serializer);
	return(entry);
}

/*
 * Adjust usage count on a jumbo buffer. In general this doesn't
 * get used much because our jumbo buffers don't get passed around
 * a lot, but it's implemented for correctness.
 */
static void
lge_jref(void *arg)
{
	struct lge_jslot *entry = (struct lge_jslot *)arg;
	struct lge_softc *sc = entry->lge_sc;

	if (&sc->lge_cdata.lge_jslots[entry->lge_slot] != entry)
		panic("lge_jref: asked to reference buffer "
		    "that we don't manage!");
	else if (entry->lge_inuse == 0)
		panic("lge_jref: buffer already free!");
	else
		atomic_add_int(&entry->lge_inuse, 1);
}

/*
 * Release a jumbo buffer.
 */
static void
lge_jfree(void *arg)
{
	struct lge_jslot *entry = (struct lge_jslot *)arg;
	struct lge_softc *sc = entry->lge_sc;

	if (sc == NULL)
		panic("lge_jfree: can't find softc pointer!");

	if (&sc->lge_cdata.lge_jslots[entry->lge_slot] != entry) {
		panic("lge_jfree: asked to free buffer that we don't manage!");
	} else if (entry->lge_inuse == 0) {
		panic("lge_jfree: buffer already free!");
	} else {
		lwkt_serialize_enter(&sc->lge_jslot_serializer);
		atomic_subtract_int(&entry->lge_inuse, 1);
		if (entry->lge_inuse == 0) {
			SLIST_INSERT_HEAD(&sc->lge_jfree_listhead,
					  entry, jslot_link);
		}
		lwkt_serialize_exit(&sc->lge_jslot_serializer);
	}
}

/*
 * A frame has been uploaded: pass the resulting mbuf chain up to
 * the higher level protocols.
 */
static void
lge_rxeof(struct lge_softc *sc, int cnt)
{
        struct ifnet *ifp = &sc->arpcom.ac_if;
        struct mbuf *m;
	struct lge_rx_desc *cur_rx;
	int c, i, total_len = 0;
	uint32_t rxsts, rxctl;


	/* 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) {
			IFNET_STAT_INC(ifp, ierrors, 1);
			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);
			lge_newbuf(sc, &LGE_RXTAIL(sc), m);
			if (m0 == NULL) {
				kprintf("lge%d: no receive buffers "
				    "available -- packet dropped!\n",
				    sc->lge_unit);
				IFNET_STAT_INC(ifp, ierrors, 1);
				continue;
			}
			m_adj(m0, ETHER_ALIGN);
			m = m0;
		} else {
			m->m_pkthdr.rcvif = ifp;
			m->m_pkthdr.len = m->m_len = total_len;
		}

		IFNET_STAT_INC(ifp, ipackets, 1);

		/* 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|
			    CSUM_FRAG_NOT_CHECKED;
			m->m_pkthdr.csum_data = 0xffff;
		}

		ifp->if_input(ifp, m, NULL, -1);
	}

	sc->lge_cdata.lge_rx_cons = i;
}

static void
lge_rxeoc(struct lge_softc *sc)
{
	struct ifnet *ifp = &sc->arpcom.ac_if;

	ifp->if_flags &= ~IFF_RUNNING;
	lge_init(sc);
}

/*
 * A frame was downloaded to the chip. It's safe for us to clean up
 * the list buffers.
 */
static void
lge_txeof(struct lge_softc *sc)
{
	struct ifnet *ifp = &sc->arpcom.ac_if;
	struct lge_tx_desc *cur_tx = NULL;
	uint32_t idx, txdone;

	/* 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];

		IFNET_STAT_INC(ifp, opackets, 1);
		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)
		ifq_clr_oactive(&ifp->if_snd);
}

static void
lge_tick(void *xsc)
{
	struct lge_softc *sc = xsc;
	struct ifnet *ifp = &sc->arpcom.ac_if;

	lwkt_serialize_enter(ifp->if_serializer);
	lge_tick_serialized(xsc);
	lwkt_serialize_exit(ifp->if_serializer);
}

static void
lge_tick_serialized(void *xsc)
{
	struct lge_softc *sc = xsc;
	struct mii_data *mii;
	struct ifnet *ifp = &sc->arpcom.ac_if;

	CSR_WRITE_4(sc, LGE_STATSIDX, LGE_STATS_SINGLE_COLL_PKTS);
	IFNET_STAT_INC(ifp, collisions, CSR_READ_4(sc, LGE_STATSVAL));
	CSR_WRITE_4(sc, LGE_STATSIDX, LGE_STATS_MULTI_COLL_PKTS);
	IFNET_STAT_INC(ifp, 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_T)
				kprintf("lge%d: gigabit link up\n",
				    sc->lge_unit);
			if (!ifq_is_empty(&ifp->if_snd))
				if_devstart(ifp);
		}
	}

	callout_reset(&sc->lge_stat_timer, hz, lge_tick, sc);
}

static void
lge_intr(void *arg)
{
	struct lge_softc *sc = arg;
	struct ifnet *ifp = &sc->arpcom.ac_if;
	uint32_t status;

	/* Supress unwanted interrupts */
	if ((ifp->if_flags & IFF_UP) == 0) {
		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;
			callout_stop(&sc->lge_stat_timer);
			lge_tick_serialized(sc);
		}
	}

	/* Re-enable interrupts. */
	CSR_WRITE_4(sc, LGE_IMR, LGE_IMR_SETRST_CTL0|LGE_IMR_INTR_ENB);

	if (!ifq_is_empty(&ifp->if_snd))
		if_devstart(ifp);
}

/*
 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
 * pointers to the fragment pointers.
 */
static int
lge_encap(struct lge_softc *sc, struct mbuf *m_head, uint32_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) {
			if (frag == LGE_FRAG_CNT)
				break;

			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++;
		}
	}
	/* Caller should make sure that 'm_head' is not excessive fragmented */
	KASSERT(m == NULL, ("too many fragments"));

	cur_tx->lge_mbuf = m_head;
	cur_tx->lge_ctl = LGE_TXCTL_WANTINTR|LGE_FRAGCNT(frag)|tot_len;
	LGE_INC((*txidx), LGE_TX_LIST_CNT);

	/* 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(struct ifnet *ifp, struct ifaltq_subque *ifsq)
{
	struct lge_softc *sc = ifp->if_softc;
	struct mbuf *m_head = NULL, *m_defragged;
	uint32_t idx;
	int need_timer;

	ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);

	if (!sc->lge_link) {
		ifq_purge(&ifp->if_snd);
		return;
	}

	idx = sc->lge_cdata.lge_tx_prod;

	if (ifq_is_oactive(&ifp->if_snd))
		return;

	need_timer = 0;
	while(sc->lge_ldata->lge_tx_list[idx].lge_mbuf == NULL) {
		struct mbuf *m;
		int frags;

		if (CSR_READ_1(sc, LGE_TXCMDFREE_8BIT) == 0) {
			ifq_set_oactive(&ifp->if_snd);
			break;
		}

		m_defragged = NULL;
		m_head = ifq_dequeue(&ifp->if_snd);
		if (m_head == NULL)
			break;

again:
		frags = 0;
		for (m = m_head; m != NULL; m = m->m_next)
			++frags;
		if (frags > LGE_FRAG_CNT) {
			if (m_defragged != NULL) {
				/*
				 * Even after defragmentation, there
				 * are still too many fragments, so
				 * drop this packet.
				 */
				m_freem(m_head);
				continue;
			}

			m_defragged = m_defrag(m_head, M_NOWAIT);
			if (m_defragged == NULL) {
				m_freem(m_head);
				continue;
			}
			m_head = m_defragged;

			/* Recount # of fragments */
			goto again;
		}

		lge_encap(sc, m_head, &idx);
		need_timer = 1;

		BPF_MTAP(ifp, m_head);
	}

	if (!need_timer)
		return;

	sc->lge_cdata.lge_tx_prod = idx;

	/*
	 * Set a timeout in case the chip goes out to lunch.
	 */
	ifp->if_timer = 5;
}

static void
lge_init(void *xsc)
{
	struct lge_softc *sc = xsc;
	struct ifnet *ifp = &sc->arpcom.ac_if;

	if (ifp->if_flags & IFF_RUNNING)
		return;

	/*
	 * Cancel pending I/O and free all RX/TX buffers.
	 */
	lge_stop(sc);
	lge_reset(sc);

	/* Set MAC address */
	CSR_WRITE_4(sc, LGE_PAR0, *(uint32_t *)(&sc->arpcom.ac_enaddr[0]));
	CSR_WRITE_4(sc, LGE_PAR1, *(uint32_t *)(&sc->arpcom.ac_enaddr[4]));

	/* Init circular RX list. */
	if (lge_list_rx_init(sc) == ENOBUFS) {
		kprintf("lge%d: initialization failed: no "
		    "memory for rx buffers\n", sc->lge_unit);
		lge_stop(sc);
		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;
	ifq_clr_oactive(&ifp->if_snd);

	callout_reset(&sc->lge_stat_timer, hz, lge_tick, sc);
}

/*
 * Set media options.
 */
static int
lge_ifmedia_upd(struct ifnet *ifp)
{
	struct lge_softc *sc = ifp->if_softc;
	struct mii_data *mii = device_get_softc(sc->lge_miibus);

	sc->lge_link = 0;
	if (mii->mii_instance) {
		struct mii_softc *miisc;
		LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
			mii_phy_reset(miisc);
	}
	mii_mediachg(mii);

	return(0);
}

/*
 * Report current media status.
 */
static void
lge_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
	struct lge_softc *sc = ifp->if_softc;
	struct mii_data *mii;

	mii = device_get_softc(sc->lge_miibus);
	mii_pollstat(mii);
	ifmr->ifm_active = mii->mii_media_active;
	ifmr->ifm_status = mii->mii_media_status;
}

static int
lge_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
{
	struct lge_softc *sc = ifp->if_softc;
	struct ifreq *ifr = (struct ifreq *) data;
	struct mii_data	 *mii;
	int error = 0;

	switch(command) {
	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 = ether_ioctl(ifp, command, data);
		break;
	}

	return(error);
}

static void
lge_watchdog(struct ifnet *ifp)
{
	struct lge_softc *sc = ifp->if_softc;

	IFNET_STAT_INC(ifp, oerrors, 1);
	kprintf("lge%d: watchdog timeout\n", sc->lge_unit);

	lge_stop(sc);
	lge_reset(sc);
	ifp->if_flags &= ~IFF_RUNNING;
	lge_init(sc);

	if (!ifq_is_empty(&ifp->if_snd))
		if_devstart(ifp);
}

/*
 * Stop the adapter and free any mbufs allocated to the
 * RX and TX lists.
 */
static void
lge_stop(struct lge_softc *sc)
{
	struct ifnet *ifp = &sc->arpcom.ac_if;
	int i;

	ifp->if_timer = 0;
	callout_stop(&sc->lge_stat_timer);
	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(&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(&sc->lge_ldata->lge_tx_list, sizeof(sc->lge_ldata->lge_tx_list));

	ifp->if_flags &= ~IFF_RUNNING;
	ifq_clr_oactive(&ifp->if_snd);
}

/*
 * 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(device_t dev)
{
	struct lge_softc *sc = device_get_softc(dev);

	lge_reset(sc);
	lge_stop(sc);
}