Initial cut at a driver for the National Semiconductor DP83820 and DP83821

gigabit macs.  (Not working for me yet.)
From FreeBSD

3 files changed, 2749 insertions, 1 deletions

diff --git a/sys/dev/pci/files.pci b/sys/dev/pci/files.pci
index 33855d12b51..582dd9001a7 100644
--- a/sys/dev/pci/files.pci
+++ b/sys/dev/pci/files.pci
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.pci,v 1.106 2001/06/06 18:53:50 millert Exp $
+#	$OpenBSD: files.pci,v 1.107 2001/06/08 02:26:13 nate Exp $
 #	$NetBSD: files.pci,v 1.20 1996/09/24 17:47:15 christos Exp $
 #
 # Config file and device description for machine-independent PCI code.
@@ -369,3 +369,8 @@ file	dev/pci/iha_pci.c		iha_pci
 device	pcscp: scsi, ncr53c9x
 attach	pcscp at pci
 file	dev/pci/pcscp.c			pcscp
+
+# National Semiconductor DP83820/DP83821 based GigE
+device	nge: ether, ifnet, mii, ifmedia, mii_phy
+attach	nge at pci
+file	dev/pci/if_nge.c		nge
diff --git a/sys/dev/pci/if_nge.c b/sys/dev/pci/if_nge.c
new file mode 100644
index 00000000000..b775e99a2d9
--- /dev/null
+++ b/sys/dev/pci/if_nge.c
@@ -0,0 +1,2041 @@
+/*	$OpenBSD: if_nge.c,v 1.1 2001/06/08 02:26:13 nate Exp $	*/
+/*
+ * Copyright (c) 2001 Wind River Systems
+ * Copyright (c) 1997, 1998, 1999, 2000, 2001
+ *	Bill Paul <wpaul@bsdi.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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * National Semiconductor DP83820/DP83821 gigabit ethernet driver
+ * for FreeBSD. Datasheets are available from:
+ *
+ * http://www.national.com/ds/DP/DP83820.pdf
+ * http://www.national.com/ds/DP/DP83821.pdf
+ *
+ * These chips are used on several low cost gigabit ethernet NICs
+ * sold by D-Link, Addtron, SMC and Asante. Both parts are
+ * virtually the same, except the 83820 is a 64-bit/32-bit part,
+ * while the 83821 is 32-bit only.
+ *
+ * Many cards also use National gigE transceivers, such as the
+ * DP83891, DP83861 and DP83862 gigPHYTER parts. The DP83861 datasheet
+ * contains a full register description that applies to all of these
+ * components:
+ *
+ * http://www.national.com/ds/DP/DP83861.pdf
+ *
+ * Written by Bill Paul <wpaul@bsdi.com>
+ * BSDi Open Source Solutions
+ */
+
+/*
+ * The NatSemi DP83820 and 83821 controllers are enhanced versions
+ * of the NatSemi MacPHYTER 10/100 devices. They support 10, 100
+ * and 1000Mbps speeds with 1000baseX (ten bit interface), MII and GMII
+ * ports. Other features include 8K TX FIFO and 32K RX FIFO, TCP/IP
+ * hardware checksum offload (IPv4 only), VLAN tagging and filtering,
+ * priority TX and RX queues, a 2048 bit multicast hash filter, 4 RX pattern
+ * matching buffers, one perfect address filter buffer and interrupt
+ * moderation. The 83820 supports both 64-bit and 32-bit addressing
+ * and data transfers: the 64-bit support can be toggled on or off
+ * via software. This affects the size of certain fields in the DMA
+ * descriptors.
+ *
+ * As far as I can tell, the 83820 and 83821 are decent chips, marred by
+ * only one flaw: the RX buffers must be aligned on 64-bit boundaries.
+ * So far this is the only gigE MAC that I've encountered with this
+ * requirement.
+ */
+
+#include "bpfilter.h"
+
+#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/device.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#endif
+
+#if NVLAN > 0
+#include <net/if_types.h>
+#include <net/if_vlan_var.h>
+#endif
+
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#endif
+
+#include <vm/vm.h>              /* for vtophys */
+#include <vm/pmap.h>            /* for vtophys */
+#include <vm/vm_kern.h>
+#include <vm/vm_extern.h>
+
+#define NGE_USEIOSPACE
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pcidevs.h>
+
+#include <dev/mii/mii.h>
+#include <dev/mii/miivar.h>
+
+#include <dev/pci/if_ngereg.h>
+
+#define NGE_CSUM_FEATURES	(CSUM_IP | CSUM_TCP | CSUM_UDP)
+
+int nge_probe		__P((struct device *, void *, void *));
+void nge_attach		__P((struct device *, struct device *, void *));
+
+int nge_alloc_jumbo_mem	__P((struct nge_softc *));
+void *nge_jalloc	__P((struct nge_softc *));
+void nge_jfree		__P((caddr_t, u_int, void *));
+
+int nge_newbuf		__P((struct nge_softc *, struct nge_desc *,
+			     struct mbuf *));
+int nge_encap		__P((struct nge_softc *, struct mbuf *, u_int32_t *));
+void nge_rxeof		__P((struct nge_softc *));
+void nge_rxeoc		__P((struct nge_softc *));
+void nge_txeof		__P((struct nge_softc *));
+int nge_intr		__P((void *));
+void nge_tick		__P((void *));
+void nge_start		__P((struct ifnet *));
+int nge_ioctl		__P((struct ifnet *, u_long, caddr_t));
+void nge_init		__P((void *));
+void nge_stop		__P((struct nge_softc *));
+void nge_watchdog	__P((struct ifnet *));
+void nge_shutdown	__P((void *));
+int nge_ifmedia_upd	__P((struct ifnet *));
+void nge_ifmedia_sts	__P((struct ifnet *, struct ifmediareq *));
+
+void nge_delay		__P((struct nge_softc *));
+void nge_eeprom_idle	__P((struct nge_softc *));
+void nge_eeprom_putbyte	__P((struct nge_softc *, int));
+void nge_eeprom_getword	__P((struct nge_softc *, int, u_int16_t *));
+void nge_read_eeprom	__P((struct nge_softc *, caddr_t, int, int, int));
+
+void nge_mii_sync	__P((struct nge_softc *));
+void nge_mii_send	__P((struct nge_softc *, u_int32_t, int));
+int nge_mii_readreg	__P((struct nge_softc *, struct nge_mii_frame *));
+int nge_mii_writereg	__P((struct nge_softc *, struct nge_mii_frame *));
+
+int nge_miibus_readreg	__P((struct device *, int, int));
+void nge_miibus_writereg	__P((struct device *, int, int, int));
+void nge_miibus_statchg	__P((struct device *));
+
+void nge_setmulti	__P((struct nge_softc *));
+u_int32_t nge_crc	__P((struct nge_softc *, caddr_t));
+void nge_reset		__P((struct nge_softc *));
+int nge_list_rx_init	__P((struct nge_softc *));
+int nge_list_tx_init	__P((struct nge_softc *));
+
+#ifdef NGE_USEIOSPACE
+#define NGE_RES			SYS_RES_IOPORT
+#define NGE_RID			NGE_PCI_LOIO
+#else
+#define NGE_RES			SYS_RES_MEMORY
+#define NGE_RID			NGE_PCI_LOMEM
+#endif
+
+#define NGE_DEBUG
+#ifdef NGE_DEBUG
+#define DPRINTF(x)	if (ngedebug) printf x
+#define DPRINTFN(n,x)	if (ngedebug >= (n)) printf x
+int	ngedebug = 10;
+#else
+#define DPRINTF(x)
+#define DPRINTFN(n,x)
+#endif
+
+#define NGE_SETBIT(sc, reg, x)				\
+	CSR_WRITE_4(sc, reg,				\
+		CSR_READ_4(sc, reg) | (x))
+
+#define NGE_CLRBIT(sc, reg, x)				\
+	CSR_WRITE_4(sc, reg,				\
+		CSR_READ_4(sc, reg) & ~(x))
+
+#define SIO_SET(x)					\
+	CSR_WRITE_4(sc, NGE_MEAR, CSR_READ_4(sc, NGE_MEAR) | x)
+
+#define SIO_CLR(x)					\
+	CSR_WRITE_4(sc, NGE_MEAR, CSR_READ_4(sc, NGE_MEAR) & ~x)
+
+void nge_delay(sc)
+	struct nge_softc	*sc;
+{
+	int			idx;
+
+	for (idx = (300 / 33) + 1; idx > 0; idx--)
+		CSR_READ_4(sc, NGE_CSR);
+
+	return;
+}
+
+void nge_eeprom_idle(sc)
+	struct nge_softc	*sc;
+{
+	register int		i;
+
+	SIO_SET(NGE_MEAR_EE_CSEL);
+	nge_delay(sc);
+	SIO_SET(NGE_MEAR_EE_CLK);
+	nge_delay(sc);
+
+	for (i = 0; i < 25; i++) {
+		SIO_CLR(NGE_MEAR_EE_CLK);
+		nge_delay(sc);
+		SIO_SET(NGE_MEAR_EE_CLK);
+		nge_delay(sc);
+	}
+
+	SIO_CLR(NGE_MEAR_EE_CLK);
+	nge_delay(sc);
+	SIO_CLR(NGE_MEAR_EE_CSEL);
+	nge_delay(sc);
+	CSR_WRITE_4(sc, NGE_MEAR, 0x00000000);
+
+	return;
+}
+
+/*
+ * Send a read command and address to the EEPROM, check for ACK.
+ */
+void nge_eeprom_putbyte(sc, addr)
+	struct nge_softc	*sc;
+	int			addr;
+{
+	register int		d, i;
+
+	d = addr | NGE_EECMD_READ;
+
+	/*
+	 * Feed in each bit and stobe the clock.
+	 */
+	for (i = 0x400; i; i >>= 1) {
+		if (d & i) {
+			SIO_SET(NGE_MEAR_EE_DIN);
+		} else {
+			SIO_CLR(NGE_MEAR_EE_DIN);
+		}
+		nge_delay(sc);
+		SIO_SET(NGE_MEAR_EE_CLK);
+		nge_delay(sc);
+		SIO_CLR(NGE_MEAR_EE_CLK);
+		nge_delay(sc);
+	}
+
+	return;
+}
+
+/*
+ * Read a word of data stored in the EEPROM at address 'addr.'
+ */
+void nge_eeprom_getword(sc, addr, dest)
+	struct nge_softc	*sc;
+	int			addr;
+	u_int16_t		*dest;
+{
+	register int		i;
+	u_int16_t		word = 0;
+
+	/* Force EEPROM to idle state. */
+	nge_eeprom_idle(sc);
+
+	/* Enter EEPROM access mode. */
+	nge_delay(sc);
+	SIO_CLR(NGE_MEAR_EE_CLK);
+	nge_delay(sc);
+	SIO_SET(NGE_MEAR_EE_CSEL);
+	nge_delay(sc);
+
+	/*
+	 * Send address of word we want to read.
+	 */
+	nge_eeprom_putbyte(sc, addr);
+
+	/*
+	 * Start reading bits from EEPROM.
+	 */
+	for (i = 0x8000; i; i >>= 1) {
+		SIO_SET(NGE_MEAR_EE_CLK);
+		nge_delay(sc);
+		if (CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_EE_DOUT)
+			word |= i;
+		nge_delay(sc);
+		SIO_CLR(NGE_MEAR_EE_CLK);
+		nge_delay(sc);
+	}
+
+	/* Turn off EEPROM access mode. */
+	nge_eeprom_idle(sc);
+
+	*dest = word;
+
+	return;
+}
+
+/*
+ * Read a sequence of words from the EEPROM.
+ */
+void nge_read_eeprom(sc, dest, off, cnt, swap)
+	struct nge_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++) {
+		nge_eeprom_getword(sc, off + i, &word);
+		ptr = (u_int16_t *)(dest + (i * 2));
+		if (swap)
+			*ptr = ntohs(word);
+		else
+			*ptr = word;
+	}
+
+	return;
+}
+
+/*
+ * Sync the PHYs by setting data bit and strobing the clock 32 times.
+ */
+void nge_mii_sync(sc)
+	struct nge_softc		*sc;
+{
+	register int		i;
+
+	SIO_SET(NGE_MEAR_MII_DIR|NGE_MEAR_MII_DATA);
+
+	for (i = 0; i < 32; i++) {
+		SIO_SET(NGE_MEAR_MII_CLK);
+		DELAY(1);
+		SIO_CLR(NGE_MEAR_MII_CLK);
+		DELAY(1);
+	}
+
+	return;
+}
+
+/*
+ * Clock a series of bits through the MII.
+ */
+void nge_mii_send(sc, bits, cnt)
+	struct nge_softc		*sc;
+	u_int32_t		bits;
+	int			cnt;
+{
+	int			i;
+
+	SIO_CLR(NGE_MEAR_MII_CLK);
+
+	for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
+                if (bits & i) {
+			SIO_SET(NGE_MEAR_MII_DATA);
+                } else {
+			SIO_CLR(NGE_MEAR_MII_DATA);
+                }
+		DELAY(1);
+		SIO_CLR(NGE_MEAR_MII_CLK);
+		DELAY(1);
+		SIO_SET(NGE_MEAR_MII_CLK);
+	}
+}
+
+/*
+ * Read an PHY register through the MII.
+ */
+int nge_mii_readreg(sc, frame)
+	struct nge_softc		*sc;
+	struct nge_mii_frame	*frame;
+	
+{
+	int			i, ack, s;
+
+	s = splimp();
+
+	/*
+	 * Set up frame for RX.
+	 */
+	frame->mii_stdelim = NGE_MII_STARTDELIM;
+	frame->mii_opcode = NGE_MII_READOP;
+	frame->mii_turnaround = 0;
+	frame->mii_data = 0;
+	
+	CSR_WRITE_4(sc, NGE_MEAR, 0);
+
+	/*
+ 	 * Turn on data xmit.
+	 */
+	SIO_SET(NGE_MEAR_MII_DIR);
+
+	nge_mii_sync(sc);
+
+	/*
+	 * Send command/address info.
+	 */
+	nge_mii_send(sc, frame->mii_stdelim, 2);
+	nge_mii_send(sc, frame->mii_opcode, 2);
+	nge_mii_send(sc, frame->mii_phyaddr, 5);
+	nge_mii_send(sc, frame->mii_regaddr, 5);
+
+	/* Idle bit */
+	SIO_CLR((NGE_MEAR_MII_CLK|NGE_MEAR_MII_DATA));
+	DELAY(1);
+	SIO_SET(NGE_MEAR_MII_CLK);
+	DELAY(1);
+
+	/* Turn off xmit. */
+	SIO_CLR(NGE_MEAR_MII_DIR);
+	/* Check for ack */
+	SIO_CLR(NGE_MEAR_MII_CLK);
+	DELAY(1);
+	SIO_SET(NGE_MEAR_MII_CLK);
+	DELAY(1);
+	ack = CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_MII_DATA;
+
+	/*
+	 * Now try reading data bits. If the ack failed, we still
+	 * need to clock through 16 cycles to keep the PHY(s) in sync.
+	 */
+	if (ack) {
+		for(i = 0; i < 16; i++) {
+			SIO_CLR(NGE_MEAR_MII_CLK);
+			DELAY(1);
+			SIO_SET(NGE_MEAR_MII_CLK);
+			DELAY(1);
+		}
+		goto fail;
+	}
+
+	for (i = 0x8000; i; i >>= 1) {
+		SIO_CLR(NGE_MEAR_MII_CLK);
+		DELAY(1);
+		if (!ack) {
+			if (CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_MII_DATA)
+				frame->mii_data |= i;
+			DELAY(1);
+		}
+		SIO_SET(NGE_MEAR_MII_CLK);
+		DELAY(1);
+	}
+
+fail:
+
+	SIO_CLR(NGE_MEAR_MII_CLK);
+	DELAY(1);
+	SIO_SET(NGE_MEAR_MII_CLK);
+	DELAY(1);
+
+	splx(s);
+
+	if (ack)
+		return(1);
+	return(0);
+}
+
+/*
+ * Write to a PHY register through the MII.
+ */
+int nge_mii_writereg(sc, frame)
+	struct nge_softc		*sc;
+	struct nge_mii_frame	*frame;
+	
+{
+	int			s;
+
+	s = splimp();
+	/*
+	 * Set up frame for TX.
+	 */
+
+	frame->mii_stdelim = NGE_MII_STARTDELIM;
+	frame->mii_opcode = NGE_MII_WRITEOP;
+	frame->mii_turnaround = NGE_MII_TURNAROUND;
+	
+	/*
+ 	 * Turn on data output.
+	 */
+	SIO_SET(NGE_MEAR_MII_DIR);
+
+	nge_mii_sync(sc);
+
+	nge_mii_send(sc, frame->mii_stdelim, 2);
+	nge_mii_send(sc, frame->mii_opcode, 2);
+	nge_mii_send(sc, frame->mii_phyaddr, 5);
+	nge_mii_send(sc, frame->mii_regaddr, 5);
+	nge_mii_send(sc, frame->mii_turnaround, 2);
+	nge_mii_send(sc, frame->mii_data, 16);
+
+	/* Idle bit. */
+	SIO_SET(NGE_MEAR_MII_CLK);
+	DELAY(1);
+	SIO_CLR(NGE_MEAR_MII_CLK);
+	DELAY(1);
+
+	/*
+	 * Turn off xmit.
+	 */
+	SIO_CLR(NGE_MEAR_MII_DIR);
+
+	splx(s);
+
+	return(0);
+}
+
+int nge_miibus_readreg(dev, phy, reg)
+	struct device		*dev;
+	int			phy, reg;
+{
+	struct nge_softc	*sc = (struct nge_softc *)dev;
+	struct nge_mii_frame	frame;
+
+	bzero((char *)&frame, sizeof(frame));
+
+	frame.mii_phyaddr = phy;
+	frame.mii_regaddr = reg;
+	nge_mii_readreg(sc, &frame);
+
+	return(frame.mii_data);
+}
+
+void nge_miibus_writereg(dev, phy, reg, data)
+	struct device		*dev;
+	int			phy, reg, data;
+{
+	struct nge_softc	*sc = (struct nge_softc *)dev;
+	struct nge_mii_frame	frame;
+
+
+	bzero((char *)&frame, sizeof(frame));
+
+	frame.mii_phyaddr = phy;
+	frame.mii_regaddr = reg;
+	frame.mii_data = data;
+	nge_mii_writereg(sc, &frame);
+
+	return;
+}
+
+void nge_miibus_statchg(dev)
+	struct device		*dev;
+{
+	struct nge_softc	*sc = (struct nge_softc *)dev;
+	struct mii_data		*mii = &sc->nge_mii;
+
+	if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
+		NGE_SETBIT(sc, NGE_TX_CFG,
+		    (NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
+		NGE_SETBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
+	} else {
+		NGE_CLRBIT(sc, NGE_TX_CFG,
+		    (NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
+		NGE_CLRBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
+	}
+
+	return;
+}
+
+u_int32_t nge_crc(sc, addr)
+	struct nge_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 >> 21) & 0x00000FFF);
+}
+
+void nge_setmulti(sc)
+	struct nge_softc	*sc;
+{
+	struct arpcom		*ac = &sc->arpcom;
+	struct ifnet		*ifp = &ac->ac_if;
+	struct ether_multi      *enm;
+	struct ether_multistep  step;
+	u_int32_t		h = 0, i, filtsave;
+	int			bit, index;
+
+	ifp = &sc->arpcom.ac_if;
+
+	if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
+		NGE_CLRBIT(sc, NGE_RXFILT_CTL,
+		    NGE_RXFILTCTL_MCHASH|NGE_RXFILTCTL_UCHASH);
+		NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ALLMULTI);
+		return;
+	}
+
+	/*
+	 * We have to explicitly enable the multicast hash table
+	 * on the NatSemi chip if we want to use it, which we do.
+	 * We also have to tell it that we don't want to use the
+	 * hash table for matching unicast addresses.
+	 */
+	NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_MCHASH);
+	NGE_CLRBIT(sc, NGE_RXFILT_CTL,
+	    NGE_RXFILTCTL_ALLMULTI|NGE_RXFILTCTL_UCHASH);
+
+	filtsave = CSR_READ_4(sc, NGE_RXFILT_CTL);
+
+	/* first, zot all the existing hash bits */
+	for (i = 0; i < NGE_MCAST_FILTER_LEN; i += 2) {
+		CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_MCAST_LO + i);
+		CSR_WRITE_4(sc, NGE_RXFILT_DATA, 0);
+	}
+
+	/*
+	 * From the 11 bits returned by the crc routine, the top 7
+	 * bits represent the 16-bit word in the mcast hash table
+	 * that needs to be updated, and the lower 4 bits represent
+	 * which bit within that byte needs to be set.
+	 */
+	ETHER_FIRST_MULTI(step, ac, enm);
+	while (enm != NULL) {
+		h = nge_crc(sc, LLADDR((struct sockaddr_dl *)enm->enm_addrlo));
+		index = (h >> 4) & 0x7F;
+		bit = h & 0xF;
+		CSR_WRITE_4(sc, NGE_RXFILT_CTL,
+		    NGE_FILTADDR_MCAST_LO + (index * 2));
+		NGE_SETBIT(sc, NGE_RXFILT_DATA, (1 << bit));
+		ETHER_NEXT_MULTI(step, enm);
+	}
+
+	CSR_WRITE_4(sc, NGE_RXFILT_CTL, filtsave);
+
+	return;
+}
+
+void nge_reset(sc)
+	struct nge_softc	*sc;
+{
+	register int		i;
+
+	NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RESET);
+
+	for (i = 0; i < NGE_TIMEOUT; i++) {
+		if (!(CSR_READ_4(sc, NGE_CSR) & NGE_CSR_RESET))
+			break;
+	}
+
+	if (i == NGE_TIMEOUT)
+		printf("%s: reset never completed\n", sc->sc_dv.dv_xname);
+
+	/* Wait a little while for the chip to get its brains in order. */
+	DELAY(1000);
+
+	/*
+	 * If this is a NetSemi chip, make sure to clear
+	 * PME mode.
+	 */
+	CSR_WRITE_4(sc, NGE_CLKRUN, NGE_CLKRUN_PMESTS);
+	CSR_WRITE_4(sc, NGE_CLKRUN, 0);
+
+        return;
+}
+
+/*
+ * Probe for an NatSemi chip. Check the PCI vendor and device
+ * IDs against our list and return a device name if we find a match.
+ */
+int nge_probe(parent, match, aux)
+	struct device *parent;
+	void *match;
+	void *aux;
+{
+	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
+
+	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS &&
+	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_DP83820)
+		return (1);
+
+	return (0);
+}
+
+struct nge_softc *my_nge_softc;
+
+/*
+ * Attach the interface. Allocate softc structures, do ifmedia
+ * setup and ethernet/BPF attach.
+ */
+void nge_attach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct nge_softc	*sc = (struct nge_softc *)self;
+	struct pci_attach_args	*pa = aux;
+	pci_chipset_tag_t	pc = pa->pa_pc;
+	pci_intr_handle_t	ih;
+	const char		*intrstr = NULL;
+	bus_addr_t		iobase;
+	bus_size_t		iosize;
+	bus_dma_segment_t	seg;
+	bus_dmamap_t		dmamap;
+	int			s, rseg;
+	u_char			eaddr[ETHER_ADDR_LEN];
+	u_int32_t		command;
+	struct ifnet		*ifp;
+	int			error = 0;
+	caddr_t			kva;
+
+	s = splimp();
+	my_nge_softc = sc;
+
+	/*
+	 * Handle power management nonsense.
+	 */
+	DPRINTFN(5, ("Preparing for conf read\n"));
+	command = pci_conf_read(pc, pa->pa_tag, NGE_PCI_CAPID) & 0x000000FF;
+	if (command == 0x01) {
+		command = pci_conf_read(pc, pa->pa_tag, NGE_PCI_PWRMGMTCTRL);
+		if (command & NGE_PSTATE_MASK) {
+			u_int32_t		iobase, membase, irq;
+
+			/* Save important PCI config data. */
+			iobase = pci_conf_read(pc, pa->pa_tag, NGE_PCI_LOIO);
+			membase = pci_conf_read(pc, pa->pa_tag, NGE_PCI_LOMEM);
+			irq = pci_conf_read(pc, pa->pa_tag, NGE_PCI_INTLINE);
+
+			/* Reset the power state. */
+			printf("%s: chip is in D%d power mode "
+			       "-- setting to D0\n", sc->sc_dv.dv_xname,
+			       command & NGE_PSTATE_MASK);
+			command &= 0xFFFFFFFC;
+			pci_conf_write(pc, pa->pa_tag,
+				       NGE_PCI_PWRMGMTCTRL, command);
+
+			/* Restore PCI config data. */
+			pci_conf_write(pc, pa->pa_tag, NGE_PCI_LOIO, iobase);
+			pci_conf_write(pc, pa->pa_tag, NGE_PCI_LOMEM, membase);
+			pci_conf_write(pc, pa->pa_tag, NGE_PCI_INTLINE, irq);
+		}
+	}
+
+	/*
+	 * Map control/status registers.
+	 */
+	DPRINTFN(5, ("Map control/status regs\n"));
+	command = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
+	command |= PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE |
+	  PCI_COMMAND_MASTER_ENABLE;
+	pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, command);
+	command = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
+
+#ifdef NGE_USEIOSPACE
+	if (!(command & PCI_COMMAND_IO_ENABLE)) {
+		printf("%s: failed to enable I/O ports!\n",
+		       sc->sc_dv.dv_xname);
+		error = ENXIO;;
+		goto fail;
+	}
+	/*
+	 * Map control/status registers.
+	 */
+	DPRINTFN(5, ("pci_io_find\n"));
+	if (pci_io_find(pc, pa->pa_tag, NGE_PCI_LOIO, &iobase, &iosize)) {
+		printf(": can't find i/o space\n");
+		goto fail;
+	}
+	DPRINTFN(5, ("bus_space_map\n"));
+	if (bus_space_map(pa->pa_iot, iobase, iosize, 0, &sc->nge_bhandle)) {
+		printf(": can't map i/o space\n");
+		goto fail;
+	}
+	sc->nge_btag = pa->pa_iot;
+#else
+	if (!(command & PCI_COMMAND_MEM_ENABLE)) {
+		printf("%s: failed to enable memory mapping!\n",
+		       sc->sc_dv.dv_xname);
+		error = ENXIO;
+		goto fail;
+	}
+	DPRINTFN(5, ("pci_mem_find\n"));
+	if (pci_mem_find(pc, pa->pa_tag, NGE_PCI_LOMEM, &iobase,
+			 &iosize, NULL)) {
+		printf(": can't find mem space\n");
+		goto fail;
+	}
+	DPRINTFN(5, ("bus_space_map\n"));
+	if (bus_space_map(pa->pa_memt, iobase, iosize, 0, &sc->nge_bhandle)) {
+		printf(": can't map mem space\n");
+		goto fail;
+	}
+	
+	sc->nge_btag = pa->pa_memt;
+#endif
+
+	DPRINTFN(5, ("pci_intr_map\n"));
+	if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin,
+			 pa->pa_intrline, &ih)) {
+		printf(": couldn't map interrupt\n");
+		goto fail;
+	}
+
+	DPRINTFN(5, ("pci_intr_string\n"));
+	intrstr = pci_intr_string(pc, ih);
+	DPRINTFN(5, ("pci_intr_establish\n"));
+	sc->nge_intrhand = pci_intr_establish(pc, ih, IPL_NET, nge_intr, sc,
+					      sc->sc_dv.dv_xname);
+	if (sc->nge_intrhand == NULL) {
+		printf(": couldn't establish interrupt");
+		if (intrstr != NULL)
+			printf(" at %s", intrstr);
+		printf("\n");
+		goto fail;
+	}
+	printf(": %s", intrstr);
+
+	/* Reset the adapter. */
+	DPRINTFN(5, ("nge_reset\n"));
+	nge_reset(sc);
+
+	/*
+	 * Get station address from the EEPROM.
+	 */
+	DPRINTFN(5, ("nge_read_eeprom\n"));
+	nge_read_eeprom(sc, (caddr_t)&eaddr[4], NGE_EE_NODEADDR, 1, 0);
+	nge_read_eeprom(sc, (caddr_t)&eaddr[2], NGE_EE_NODEADDR + 1, 1, 0);
+	nge_read_eeprom(sc, (caddr_t)&eaddr[0], NGE_EE_NODEADDR + 2, 1, 0);
+
+	/*
+	 * A NatSemi chip was detected. Inform the world.
+	 */
+	printf(": Ethernet address: %s\n", ether_sprintf(eaddr), ":");
+
+	bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
+
+	sc->sc_dmatag = pa->pa_dmat;
+	DPRINTFN(5, ("bus_dmamem_alloc\n"));
+	if (bus_dmamem_alloc(sc->sc_dmatag, sizeof(struct nge_list_data),
+			     PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) {
+		printf("%s: can't alloc rx buffers\n", sc->sc_dv.dv_xname);
+		goto fail;
+	}
+	DPRINTFN(5, ("bus_dmamem_map\n"));
+	if (bus_dmamem_map(sc->sc_dmatag, &seg, rseg,
+			   sizeof(struct nge_list_data), &kva,
+			   BUS_DMA_NOWAIT)) {
+		printf("%s: can't map dma buffers (%d bytes)\n",
+		       sc->sc_dv.dv_xname, sizeof(struct nge_list_data));
+		bus_dmamem_free(sc->sc_dmatag, &seg, rseg);
+		goto fail;
+	}
+	DPRINTFN(5, ("bus_dmamem_create\n"));
+	if (bus_dmamap_create(sc->sc_dmatag, sizeof(struct nge_list_data), 1,
+			      sizeof(struct nge_list_data), 0,
+			      BUS_DMA_NOWAIT, &dmamap)) {
+		printf("%s: can't create dma map\n", sc->sc_dv.dv_xname);
+		bus_dmamem_unmap(sc->sc_dmatag, kva,
+				 sizeof(struct nge_list_data));
+		bus_dmamem_free(sc->sc_dmatag, &seg, rseg);
+		goto fail;
+	}
+	DPRINTFN(5, ("bus_dmamem_load\n"));
+	if (bus_dmamap_load(sc->sc_dmatag, dmamap, kva,
+			    sizeof(struct nge_list_data), NULL,
+			    BUS_DMA_NOWAIT)) {
+		bus_dmamap_destroy(sc->sc_dmatag, dmamap);
+		bus_dmamem_unmap(sc->sc_dmatag, kva,
+				 sizeof(struct nge_list_data));
+		bus_dmamem_free(sc->sc_dmatag, &seg, rseg);
+		goto fail;
+	}
+
+	DPRINTFN(5, ("bzero\n"));
+	sc->nge_ldata = (struct nge_list_data *)kva;
+	bzero(sc->nge_ldata, sizeof(struct nge_list_data));
+	
+	/* Try to allocate memory for jumbo buffers. */
+	DPRINTFN(5, ("nge_alloc_jumbo_mem\n"));
+	if (nge_alloc_jumbo_mem(sc)) {
+		printf("%s: jumbo buffer allocation failed\n",
+		       sc->sc_dv.dv_xname);
+		goto fail;
+	}
+
+	ifp = &sc->arpcom.ac_if;
+	ifp->if_softc = sc;
+	ifp->if_mtu = ETHERMTU;
+	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+	ifp->if_ioctl = nge_ioctl;
+	ifp->if_output = ether_output;
+	ifp->if_start = nge_start;
+	ifp->if_watchdog = nge_watchdog;
+	ifp->if_baudrate = 1000000000;
+	ifp->if_snd.ifq_maxlen = NGE_TX_LIST_CNT - 1;
+	DPRINTFN(5, ("bcopy\n"));
+	bcopy(sc->sc_dv.dv_xname, ifp->if_xname, IFNAMSIZ);
+
+	/*
+	 * Do MII setup.
+	 */
+	DPRINTFN(5, ("mii setup\n"));
+	sc->nge_mii.mii_ifp = ifp;
+	sc->nge_mii.mii_readreg = nge_miibus_readreg;
+	sc->nge_mii.mii_writereg = nge_miibus_writereg;
+	sc->nge_mii.mii_statchg = nge_miibus_statchg;
+	ifmedia_init(&sc->nge_mii.mii_media, 0, nge_ifmedia_upd,
+		     nge_ifmedia_sts);
+	mii_attach(&sc->sc_dv, &sc->nge_mii, 0xffffffff, MII_PHY_ANY,
+		   MII_OFFSET_ANY, 0);
+
+	if (LIST_FIRST(&sc->nge_mii.mii_phys) == NULL) {
+		printf("%s: no PHY found!\n", sc->sc_dv.dv_xname);
+		ifmedia_add(&sc->nge_mii.mii_media, IFM_ETHER|IFM_MANUAL,
+		    0, NULL);
+		ifmedia_set(&sc->nge_mii.mii_media, IFM_ETHER|IFM_MANUAL);
+	}
+	else
+		ifmedia_set(&sc->nge_mii.mii_media, IFM_ETHER|IFM_AUTO);
+
+	/*
+	 * Call MI attach routine.
+	 */
+	DPRINTFN(5, ("if_attach\n"));
+	if_attach(ifp);
+	DPRINTFN(5, ("ether_ifattach\n"));
+	ether_ifattach(ifp);
+	DPRINTFN(5, ("timeout_set\n"));
+	timeout_set(&sc->nge_timeout, nge_tick, sc);
+	timeout_add(&sc->nge_timeout, hz);
+
+fail:
+	splx(s);
+}
+
+/*
+ * Initialize the transmit descriptors.
+ */
+int nge_list_tx_init(sc)
+	struct nge_softc	*sc;
+{
+	struct nge_list_data	*ld;
+	struct nge_ring_data	*cd;
+	int			i;
+
+	cd = &sc->nge_cdata;
+	ld = sc->nge_ldata;
+
+	for (i = 0; i < NGE_TX_LIST_CNT; i++) {
+		if (i == (NGE_TX_LIST_CNT - 1)) {
+			ld->nge_tx_list[i].nge_nextdesc =
+			    &ld->nge_tx_list[0];
+			ld->nge_tx_list[i].nge_next =
+			    vtophys(&ld->nge_tx_list[0]);
+		} else {
+			ld->nge_tx_list[i].nge_nextdesc =
+			    &ld->nge_tx_list[i + 1];
+			ld->nge_tx_list[i].nge_next =
+			    vtophys(&ld->nge_tx_list[i + 1]);
+		}
+		ld->nge_tx_list[i].nge_mbuf = NULL;
+		ld->nge_tx_list[i].nge_ptr = 0;
+		ld->nge_tx_list[i].nge_ctl = 0;
+	}
+
+	cd->nge_tx_prod = cd->nge_tx_cons = cd->nge_tx_cnt = 0;
+
+	return(0);
+}
+
+
+/*
+ * Initialize the RX descriptors and allocate mbufs for them. Note that
+ * we arrange the descriptors in a closed ring, so that the last descriptor
+ * points back to the first.
+ */
+int nge_list_rx_init(sc)
+	struct nge_softc	*sc;
+{
+	struct nge_list_data	*ld;
+	struct nge_ring_data	*cd;
+	int			i;
+
+	ld = sc->nge_ldata;
+	cd = &sc->nge_cdata;
+
+	for (i = 0; i < NGE_RX_LIST_CNT; i++) {
+		if (nge_newbuf(sc, &ld->nge_rx_list[i], NULL) == ENOBUFS)
+			return(ENOBUFS);
+		if (i == (NGE_RX_LIST_CNT - 1)) {
+			ld->nge_rx_list[i].nge_nextdesc =
+			    &ld->nge_rx_list[0];
+			ld->nge_rx_list[i].nge_next =
+			    vtophys(&ld->nge_rx_list[0]);
+		} else {
+			ld->nge_rx_list[i].nge_nextdesc =
+			    &ld->nge_rx_list[i + 1];
+			ld->nge_rx_list[i].nge_next =
+			    vtophys(&ld->nge_rx_list[i + 1]);
+		}
+	}
+
+	cd->nge_rx_prod = 0;
+
+	return(0);
+}
+
+/*
+ * Initialize an RX descriptor and attach an MBUF cluster.
+ */
+int nge_newbuf(sc, c, m)
+	struct nge_softc	*sc;
+	struct nge_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("%s: no memory for rx list "
+			       "-- packet dropped!\n", sc->sc_dv.dv_xname);
+			return(ENOBUFS);
+		}
+
+		/* Allocate the jumbo buffer */
+		buf = nge_jalloc(sc);
+		if (buf == NULL) {
+#ifdef NGE_VERBOSE
+			printf("%s: jumbo allocation failed "
+			    "-- packet dropped!\n", sc->sc_dv.dv_xname);
+#endif
+			m_freem(m_new);
+			return(ENOBUFS);
+		}
+		/* Attach the buffer to the mbuf */
+		m_new->m_data = m_new->m_ext.ext_buf = (void *)buf;
+		m_new->m_flags |= M_EXT;
+		m_new->m_ext.ext_size = m_new->m_pkthdr.len =
+			m_new->m_len = NGE_MCLBYTES;
+		m_new->m_ext.ext_free = nge_jfree;
+		m_new->m_ext.ext_arg = sc;
+		MCLINITREFERENCE(m_new);
+	} else {
+		m_new = m;
+		m_new->m_len = m_new->m_pkthdr.len = NGE_MCLBYTES;
+		m_new->m_data = m_new->m_ext.ext_buf;
+	}
+
+	m_adj(m_new, sizeof(u_int64_t));
+
+	c->nge_mbuf = m_new;
+	c->nge_ptr = vtophys(mtod(m_new, caddr_t));
+	DPRINTFN(7,("c->nge_ptr = 0x%08X\n", c->nge_ptr));
+	c->nge_ctl = m_new->m_len;
+	c->nge_extsts = 0;
+
+	return(0);
+}
+
+int nge_alloc_jumbo_mem(sc)
+	struct nge_softc	*sc;
+{
+	caddr_t			ptr, kva;
+	bus_dma_segment_t	seg;
+	bus_dmamap_t		dmamap;
+	int			i, rseg;
+	struct nge_jpool_entry	*entry;
+
+	if (bus_dmamem_alloc(sc->sc_dmatag, NGE_JMEM, PAGE_SIZE, 0,
+			     &seg, 1, &rseg, BUS_DMA_NOWAIT)) {
+		printf("%s: can't alloc rx buffers\n", sc->sc_dv.dv_xname);
+		return (ENOBUFS);
+	}
+	if (bus_dmamem_map(sc->sc_dmatag, &seg, rseg, NGE_JMEM, &kva,
+			   BUS_DMA_NOWAIT)) {
+		printf("%s: can't map dma buffers (%d bytes)\n",
+		       sc->sc_dv.dv_xname, NGE_JMEM);
+		bus_dmamem_free(sc->sc_dmatag, &seg, rseg);
+		return (ENOBUFS);
+	}
+	if (bus_dmamap_create(sc->sc_dmatag, NGE_JMEM, 1,
+			      NGE_JMEM, 0, BUS_DMA_NOWAIT, &dmamap)) {
+		printf("%s: can't create dma map\n", sc->sc_dv.dv_xname);
+		bus_dmamem_unmap(sc->sc_dmatag, kva, NGE_JMEM);
+		bus_dmamem_free(sc->sc_dmatag, &seg, rseg);
+		return (ENOBUFS);
+	}
+	if (bus_dmamap_load(sc->sc_dmatag, dmamap, kva, NGE_JMEM,
+			    NULL, BUS_DMA_NOWAIT)) {
+		printf("%s: can't load dma map\n", sc->sc_dv.dv_xname);
+		bus_dmamap_destroy(sc->sc_dmatag, dmamap);
+		bus_dmamem_unmap(sc->sc_dmatag, kva, NGE_JMEM);
+		bus_dmamem_free(sc->sc_dmatag, &seg, rseg);
+		return (ENOBUFS);
+        }
+	sc->nge_cdata.nge_jumbo_buf = (caddr_t)kva;
+	DPRINTFN(1,("nge_jumbo_buf = 0x%08X\n", sc->nge_cdata.nge_jumbo_buf));
+	DPRINTFN(1,("NGE_MCLBYTES = 0x%08X\n", NGE_MCLBYTES));
+
+	LIST_INIT(&sc->nge_jfree_listhead);
+	LIST_INIT(&sc->nge_jinuse_listhead);
+
+	/*
+	 * Now divide it up into 9K pieces and save the addresses
+	 * in an array. Note that we play an evil trick here by using
+	 * the first few bytes in the buffer to hold the the address
+	 * of the softc structure for this interface. This is because
+	 * nge_jfree() needs it, but it is called by the mbuf management
+	 * code which will not pass it to us explicitly.
+	 */
+	ptr = sc->nge_cdata.nge_jumbo_buf;
+	for (i = 0; i < NGE_JSLOTS; i++) {
+		sc->nge_cdata.nge_jslots[i].nge_buf = ptr;
+		sc->nge_cdata.nge_jslots[i].nge_inuse = 0;
+		ptr += NGE_MCLBYTES;
+		entry = malloc(sizeof(struct nge_jpool_entry), 
+			       M_DEVBUF, M_NOWAIT);
+		if (entry == NULL) {
+			bus_dmamap_unload(sc->sc_dmatag, dmamap);
+			bus_dmamap_destroy(sc->sc_dmatag, dmamap);
+			bus_dmamem_unmap(sc->sc_dmatag, kva, NGE_JMEM);
+			bus_dmamem_free(sc->sc_dmatag, &seg, rseg);
+			sc->nge_cdata.nge_jumbo_buf = NULL;
+			printf("%s: no memory for jumbo buffer queue!\n",
+			       sc->sc_dv.dv_xname);
+			return(ENOBUFS);
+		}
+		entry->slot = i;
+		LIST_INSERT_HEAD(&sc->nge_jfree_listhead, entry,
+				 jpool_entries);
+	}
+
+	return(0);
+}
+
+/*
+ * Allocate a jumbo buffer.
+ */
+void *nge_jalloc(sc)
+	struct nge_softc	*sc;
+{
+	struct nge_jpool_entry   *entry;
+	
+	entry = LIST_FIRST(&sc->nge_jfree_listhead);
+	
+	if (entry == NULL) {
+#ifdef NGE_VERBOSE
+		printf("%s: no free jumbo buffers\n", sc->sc_dv.dv_xname);
+#endif
+		return(NULL);
+	}
+
+	LIST_REMOVE(entry, jpool_entries);
+	LIST_INSERT_HEAD(&sc->nge_jinuse_listhead, entry, jpool_entries);
+	sc->nge_cdata.nge_jslots[entry->slot].nge_inuse = 1;
+	return(sc->nge_cdata.nge_jslots[entry->slot].nge_buf);
+}
+
+/*
+ * Release a jumbo buffer.
+ */
+void nge_jfree(buf, size, arg)
+	caddr_t		buf;
+	u_int		size;
+	void		*arg;
+{
+	struct nge_softc	*sc;
+	int		        i;
+	struct nge_jpool_entry *entry;
+
+	/* Extract the softc struct pointer. */
+	sc = (struct nge_softc *)arg;
+
+	if (sc == NULL)
+		panic("nge_jfree: can't find softc pointer!");
+
+	/* calculate the slot this buffer belongs to */
+
+	i = ((vaddr_t)buf - (vaddr_t)sc->nge_cdata.nge_jumbo_buf)
+	  / NGE_MCLBYTES;
+
+	if ((i < 0) || (i >= NGE_JSLOTS))
+		panic("nge_jfree: asked to free buffer that we don't manage!");
+	else if (sc->nge_cdata.nge_jslots[i].nge_inuse == 0)
+		panic("nge_jfree: buffer already free!");
+	else {
+		sc->nge_cdata.nge_jslots[i].nge_inuse--;
+		if(sc->nge_cdata.nge_jslots[i].nge_inuse == 0) {
+			entry = LIST_FIRST(&sc->nge_jinuse_listhead);
+			if (entry == NULL)
+				panic("nge_jfree: buffer not in use!");
+			entry->slot = i;
+			LIST_REMOVE(entry, jpool_entries);
+			LIST_INSERT_HEAD(&sc->nge_jfree_listhead, 
+					 entry, jpool_entries);
+		}
+	}
+
+	return;
+}
+/*
+ * A frame has been uploaded: pass the resulting mbuf chain up to
+ * the higher level protocols.
+ */
+void nge_rxeof(sc)
+	struct nge_softc	*sc;
+{
+        struct ether_header	*eh;
+        struct mbuf		*m;
+        struct ifnet		*ifp;
+	struct nge_desc		*cur_rx;
+	int			i, total_len = 0;
+	u_int32_t		rxstat;
+
+	ifp = &sc->arpcom.ac_if;
+	i = sc->nge_cdata.nge_rx_prod;
+
+	while(NGE_OWNDESC(&sc->nge_ldata->nge_rx_list[i])) {
+		struct mbuf		*m0 = NULL;
+		u_int32_t		extsts;
+
+		cur_rx = &sc->nge_ldata->nge_rx_list[i];
+		rxstat = cur_rx->nge_rxstat;
+		extsts = cur_rx->nge_extsts;
+		m = cur_rx->nge_mbuf;
+		cur_rx->nge_mbuf = NULL;
+		total_len = NGE_RXBYTES(cur_rx);
+		NGE_INC(i, NGE_RX_LIST_CNT);
+
+		/*
+		 * 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 (!(rxstat & NGE_CMDSTS_PKT_OK)) {
+			ifp->if_ierrors++;
+			nge_newbuf(sc, cur_rx, m);
+			continue;
+		}
+
+
+		/*
+		 * Ok. NatSemi really screwed up here. This is the
+		 * only gigE chip I know of with alignment constraints
+		 * on receive buffers. RX buffers must be 64-bit aligned.
+		 */
+		m0 = m_devget(mtod(m, char *) - ETHER_ALIGN,
+		    total_len + ETHER_ALIGN, 0, ifp, NULL);
+		nge_newbuf(sc, cur_rx, m);
+		if (m0 == NULL) {
+			printf("%s: no receive buffers "
+			    "available -- packet dropped!\n",
+			    sc->sc_dv.dv_xname);
+			ifp->if_ierrors++;
+			continue;
+		}
+		m_adj(m0, ETHER_ALIGN);
+		m = m0;
+
+		ifp->if_ipackets++;
+		eh = mtod(m, struct ether_header *);
+
+#if NBPFILTER > 0
+		/*
+		 * Handle BPF listeners. Let the BPF user see the packet.
+		 */
+		if (ifp->if_bpf)
+			bpf_mtap(ifp->if_bpf, m);
+#endif
+
+
+		/* Remove header from mbuf and pass it on. */
+		m_adj(m, sizeof(struct ether_header));
+
+		/* Do IP checksum checking. */
+#ifdef NGE_CSUM_OFFLOAD
+		if (extsts & NGE_RXEXTSTS_IPPKT)
+			m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
+		if (!(extsts & NGE_RXEXTSTS_IPCSUMERR))
+			m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
+#endif
+
+#if NVLAN > 0
+		/*
+		 * If we received a packet with a vlan tag, pass it
+		 * to vlan_input() instead of ether_input().
+		 */
+		if (extsts & NGE_RXEXTSTS_VLANPKT) {
+			if (vlan_input_tag(eh, m,
+					   extsts & NGE_RXEXTSTS_VTCI) < 0)
+				ifp->if_data.ifi_noproto++;
+                        continue;
+                }
+#endif
+
+		ether_input(ifp, eh, m);
+	}
+
+	sc->nge_cdata.nge_rx_prod = i;
+
+	return;
+}
+
+void nge_rxeoc(sc)
+	struct nge_softc	*sc;
+{
+	struct ifnet		*ifp;
+
+	ifp = &sc->arpcom.ac_if;
+	nge_rxeof(sc);
+	ifp->if_flags &= ~IFF_RUNNING;
+	nge_init(sc);
+	return;
+}
+
+/*
+ * A frame was downloaded to the chip. It's safe for us to clean up
+ * the list buffers.
+ */
+
+void nge_txeof(sc)
+	struct nge_softc	*sc;
+{
+	struct nge_desc		*cur_tx = NULL;
+	struct ifnet		*ifp;
+	u_int32_t		idx;
+
+	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->nge_cdata.nge_tx_cons;
+	while (idx != sc->nge_cdata.nge_tx_prod) {
+		cur_tx = &sc->nge_ldata->nge_tx_list[idx];
+
+		if (NGE_OWNDESC(cur_tx))
+			break;
+
+		if (cur_tx->nge_ctl & NGE_CMDSTS_MORE) {
+			sc->nge_cdata.nge_tx_cnt--;
+			NGE_INC(idx, NGE_TX_LIST_CNT);
+			continue;
+		}
+
+		if (!(cur_tx->nge_ctl & NGE_CMDSTS_PKT_OK)) {
+			ifp->if_oerrors++;
+			if (cur_tx->nge_txstat & NGE_TXSTAT_EXCESSCOLLS)
+				ifp->if_collisions++;
+			if (cur_tx->nge_txstat & NGE_TXSTAT_OUTOFWINCOLL)
+				ifp->if_collisions++;
+		}
+
+		ifp->if_collisions +=
+		    (cur_tx->nge_txstat & NGE_TXSTAT_COLLCNT) >> 16;
+
+		ifp->if_opackets++;
+		if (cur_tx->nge_mbuf != NULL) {
+			m_freem(cur_tx->nge_mbuf);
+			cur_tx->nge_mbuf = NULL;
+		}
+
+		sc->nge_cdata.nge_tx_cnt--;
+		NGE_INC(idx, NGE_TX_LIST_CNT);
+		ifp->if_timer = 0;
+	}
+
+	sc->nge_cdata.nge_tx_cons = idx;
+
+	if (cur_tx != NULL)
+		ifp->if_flags &= ~IFF_OACTIVE;
+
+	return;
+}
+
+void nge_tick(xsc)
+	void			*xsc;
+{
+	struct nge_softc	*sc = xsc;
+	struct mii_data		*mii = &sc->nge_mii;
+	struct ifnet		*ifp = &sc->arpcom.ac_if;
+	int			s;
+
+	s = splimp();
+
+	mii_tick(mii);
+
+	if (!sc->nge_link) {
+		mii_pollstat(mii);
+		if (mii->mii_media_status & IFM_ACTIVE &&
+		    IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
+			sc->nge_link++;
+			if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_TX)
+				printf("%s: gigabit link up\n",
+				       sc->sc_dv.dv_xname);
+			if (ifp->if_snd.ifq_head != NULL)
+				nge_start(ifp);
+		} else
+			timeout_add(&sc->nge_timeout, hz);
+		
+	}
+
+
+	splx(s);
+
+	return;
+}
+
+int nge_intr(arg)
+	void			*arg;
+{
+	struct nge_softc	*sc;
+	struct ifnet		*ifp;
+	u_int32_t		status;
+	int			claimed = 0;
+
+	sc = arg;
+	ifp = &sc->arpcom.ac_if;
+
+	/* Supress unwanted interrupts */
+	if (!(ifp->if_flags & IFF_UP)) {
+		nge_stop(sc);
+		return (0);
+	}
+
+	/* Disable interrupts. */
+	CSR_WRITE_4(sc, NGE_IER, 0);
+
+	for (;;) {
+		/* Reading the ISR register clears all interrupts. */
+		status = CSR_READ_4(sc, NGE_ISR);
+
+		if ((status & NGE_INTRS) == 0)
+			break;
+
+		claimed = 1;
+		
+		if ((status & NGE_ISR_TX_DESC_OK) ||
+		    (status & NGE_ISR_TX_ERR) ||
+		    (status & NGE_ISR_TX_OK) ||
+		    (status & NGE_ISR_TX_IDLE))
+			nge_txeof(sc);
+
+		if ((status & NGE_ISR_RX_DESC_OK) ||
+		    (status & NGE_ISR_RX_OK))
+			nge_rxeof(sc);
+
+		if ((status & NGE_ISR_RX_ERR) ||
+		    (status & NGE_ISR_RX_OFLOW)) {
+			nge_rxeoc(sc);
+		}
+
+		if (status & NGE_ISR_SYSERR) {
+			nge_reset(sc);
+			ifp->if_flags &= ~IFF_RUNNING;
+			nge_init(sc);
+		}
+
+		if (status & NGE_IMR_PHY_INTR) {
+			sc->nge_link = 0;
+			nge_tick(sc);
+		}
+	}
+
+	/* Re-enable interrupts. */
+	CSR_WRITE_4(sc, NGE_IER, 1);
+
+	if (ifp->if_snd.ifq_head != NULL)
+		nge_start(ifp);
+
+	return claimed;
+}
+
+/*
+ * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
+ * pointers to the fragment pointers.
+ */
+int nge_encap(sc, m_head, txidx)
+	struct nge_softc	*sc;
+	struct mbuf		*m_head;
+	u_int32_t		*txidx;
+{
+	struct nge_desc		*f = NULL;
+	struct mbuf		*m;
+	int			frag, cur, cnt = 0;
+#if NVLAN > 0
+	struct ifvlan		*ifv = NULL;
+
+	if ((m_head->m_flags & (M_PROTO1|M_PKTHDR)) == (M_PROTO1|M_PKTHDR) &&
+	    m_head->m_pkthdr.rcvif != NULL)
+		ifv = m_head->m_pkthdr.rcvif->if_softc;
+#endif
+
+	/*
+ 	 * 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 = frag = *txidx;
+
+	for (m = m_head; m != NULL; m = m->m_next) {
+		if (m->m_len != 0) {
+			if ((NGE_TX_LIST_CNT -
+			    (sc->nge_cdata.nge_tx_cnt + cnt)) < 2)
+				return(ENOBUFS);
+			f = &sc->nge_ldata->nge_tx_list[frag];
+			f->nge_ctl = NGE_CMDSTS_MORE | m->m_len;
+			f->nge_ptr = vtophys(mtod(m, vm_offset_t));
+			DPRINTFN(7,("f->nge_ptr = 0x%08X\n", f->nge_ptr));
+			if (cnt != 0)
+				f->nge_ctl |= NGE_CMDSTS_OWN;
+			cur = frag;
+			NGE_INC(frag, NGE_TX_LIST_CNT);
+			cnt++;
+		}
+	}
+
+	if (m != NULL)
+		return(ENOBUFS);
+
+	sc->nge_ldata->nge_tx_list[cur].nge_extsts = 0;
+
+#if NVLAN > 0
+	if (ifv != NULL) {
+		sc->nge_ldata->nge_tx_list[cur].nge_extsts |=
+			(NGE_TXEXTSTS_VLANPKT|ifv->ifv_tag);
+	}
+#endif
+
+	sc->nge_ldata->nge_tx_list[cur].nge_mbuf = m_head;
+	sc->nge_ldata->nge_tx_list[cur].nge_ctl &= ~NGE_CMDSTS_MORE;
+	sc->nge_ldata->nge_tx_list[*txidx].nge_ctl |= NGE_CMDSTS_OWN;
+	sc->nge_cdata.nge_tx_cnt += cnt;
+	*txidx = frag;
+
+	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.
+ */
+
+void nge_start(ifp)
+	struct ifnet		*ifp;
+{
+	struct nge_softc	*sc;
+	struct mbuf		*m_head = NULL;
+	u_int32_t		idx;
+
+	sc = ifp->if_softc;
+
+	if (!sc->nge_link)
+		return;
+
+	idx = sc->nge_cdata.nge_tx_prod;
+
+	if (ifp->if_flags & IFF_OACTIVE)
+		return;
+
+	while(sc->nge_ldata->nge_tx_list[idx].nge_mbuf == NULL) {
+		IF_DEQUEUE(&ifp->if_snd, m_head);
+		if (m_head == NULL)
+			break;
+
+		if (nge_encap(sc, m_head, &idx)) {
+			IF_PREPEND(&ifp->if_snd, m_head);
+			ifp->if_flags |= IFF_OACTIVE;
+			break;
+		}
+
+#if NBPFILTER > 0
+		/*
+		 * If there's a BPF listener, bounce a copy of this frame
+		 * to him.
+		 */
+		if (ifp->if_bpf)
+			bpf_mtap(ifp->if_bpf, m_head);
+#endif
+
+	}
+
+	/* Transmit */
+	sc->nge_cdata.nge_tx_prod = idx;
+	NGE_SETBIT(sc, NGE_CSR, NGE_CSR_TX_ENABLE);
+
+	/*
+	 * Set a timeout in case the chip goes out to lunch.
+	 */
+	ifp->if_timer = 5;
+
+	return;
+}
+
+int nge_loop = 0;
+
+void nge_init(xsc)
+	void			*xsc;
+{
+	struct nge_softc	*sc = xsc;
+	struct ifnet		*ifp = &sc->arpcom.ac_if;
+	struct mii_data		*mii = &sc->nge_mii;
+	int			s;
+
+	if (ifp->if_flags & IFF_RUNNING)
+		return;
+
+	s = splimp();
+
+	/*
+	 * Cancel pending I/O and free all RX/TX buffers.
+	 */
+	nge_stop(sc);
+	nge_reset(sc);
+
+	/* Set MAC address */
+	CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR0);
+	CSR_WRITE_4(sc, NGE_RXFILT_DATA,
+	    ((u_int16_t *)sc->arpcom.ac_enaddr)[0]);
+	CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR1);
+	CSR_WRITE_4(sc, NGE_RXFILT_DATA,
+	    ((u_int16_t *)sc->arpcom.ac_enaddr)[1]);
+	CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR2);
+	CSR_WRITE_4(sc, NGE_RXFILT_DATA,
+	    ((u_int16_t *)sc->arpcom.ac_enaddr)[2]);
+
+	/* Init circular RX list. */
+	if (nge_list_rx_init(sc) == ENOBUFS) {
+		printf("%s: initialization failed: no "
+			"memory for rx buffers\n", sc->sc_dv.dv_xname);
+		nge_stop(sc);
+		(void)splx(s);
+		return;
+	}
+
+	/*
+	 * Init tx descriptors.
+	 */
+	nge_list_tx_init(sc);
+
+	/*
+	 * For the NatSemi chip, we have to explicitly enable the
+	 * reception of ARP frames, as well as turn on the 'perfect
+	 * match' filter where we store the station address, otherwise
+	 * we won't receive unicasts meant for this host.
+	 */
+	NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ARP);
+	NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_PERFECT);
+
+	 /* If we want promiscuous mode, set the allframes bit. */
+	if (ifp->if_flags & IFF_PROMISC) {
+		NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ALLPHYS);
+	} else {
+		NGE_CLRBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ALLPHYS);
+	}
+
+	/*
+	 * Set the capture broadcast bit to capture broadcast frames.
+	 */
+	if (ifp->if_flags & IFF_BROADCAST) {
+		NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_BROAD);
+	} else {
+		NGE_CLRBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_BROAD);
+	}
+
+	/*
+	 * Load the multicast filter.
+	 */
+	nge_setmulti(sc);
+
+	/* Turn the receive filter on */
+	NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ENABLE);
+
+	/*
+	 * Load the address of the RX and TX lists.
+	 */
+	CSR_WRITE_4(sc, NGE_RX_LISTPTR,
+	    vtophys(&sc->nge_ldata->nge_rx_list[0]));
+	CSR_WRITE_4(sc, NGE_TX_LISTPTR,
+	    vtophys(&sc->nge_ldata->nge_tx_list[0]));
+
+	/* Set RX configuration */
+	CSR_WRITE_4(sc, NGE_RX_CFG, NGE_RXCFG);
+	/*
+	 * Enable hardware checksum validation for all IPv4
+	 * packets, do not reject packets with bad checksums.
+	 */
+#ifdef NGE_CSUM_OFFLOAD
+	CSR_WRITE_4(sc, NGE_VLAN_IP_RXCTL, NGE_VIPRXCTL_IPCSUM_ENB);
+#endif
+
+#if NVLAN > 0
+	/*
+	 * If VLAN support is enabled, tell the chip to detect
+	 * and strip VLAN tag info from received frames. The tag
+	 * will be provided in the extsts field in the RX descriptors.
+	 */
+	NGE_SETBIT(sc, NGE_VLAN_IP_RXCTL,
+	    NGE_VIPRXCTL_TAG_DETECT_ENB|NGE_VIPRXCTL_TAG_STRIP_ENB);
+#endif
+
+	/* Set TX configuration */
+	CSR_WRITE_4(sc, NGE_TX_CFG, NGE_TXCFG |
+		    (nge_loop ? NGE_TXCFG_LOOPBK : 0));
+
+	/*
+	 * Enable TX IPv4 checksumming on a per-packet basis.
+	 */
+#ifdef NGE_CSUM_OFFLOAD
+	CSR_WRITE_4(sc, NGE_VLAN_IP_TXCTL, NGE_VIPTXCTL_CSUM_PER_PKT);
+#endif
+
+#if NVLAN > 0
+	/*
+	 * If VLAN support is enabled, tell the chip to insert
+	 * VLAN tags on a per-packet basis as dictated by the
+	 * code in the frame encapsulation routine.
+	 */
+	NGE_SETBIT(sc, NGE_VLAN_IP_TXCTL, NGE_VIPTXCTL_TAG_PER_PKT);
+#endif
+
+	/* Set full/half duplex mode. */
+	if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
+		NGE_SETBIT(sc, NGE_TX_CFG,
+		    (NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
+		NGE_SETBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
+	} else {
+		NGE_CLRBIT(sc, NGE_TX_CFG,
+		    (NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
+		NGE_CLRBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
+	}
+
+	/*
+	 * Enable the delivery of PHY interrupts based on
+	 * link/speed/duplex status changes.
+	 */
+	NGE_SETBIT(sc, NGE_CFG, NGE_CFG_PHYINTR_SPD|NGE_CFG_MODE_1000|
+	    NGE_CFG_PHYINTR_LNK|NGE_CFG_PHYINTR_DUP);
+
+	/*
+	 * Enable interrupts.
+	 */
+	CSR_WRITE_4(sc, NGE_IMR, NGE_INTRS);
+	CSR_WRITE_4(sc, NGE_IER, 1);
+
+	/* Enable receiver and transmitter. */
+	NGE_CLRBIT(sc, NGE_CSR, NGE_CSR_TX_DISABLE|NGE_CSR_RX_DISABLE);
+	NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RX_ENABLE);
+
+	nge_ifmedia_upd(ifp);
+
+	ifp->if_flags |= IFF_RUNNING;
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+	(void)splx(s);
+
+	return;
+}
+
+/*
+ * Set media options.
+ */
+int nge_ifmedia_upd(ifp)
+	struct ifnet		*ifp;
+{
+	struct nge_softc	*sc = ifp->if_softc;
+	struct mii_data		*mii = &sc->nge_mii;
+
+	sc->nge_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.
+ */
+void nge_ifmedia_sts(ifp, ifmr)
+	struct ifnet		*ifp;
+	struct ifmediareq	*ifmr;
+{
+	struct nge_softc	*sc = ifp->if_softc;
+	struct mii_data		*mii = &sc->nge_mii;
+
+	mii_pollstat(mii);
+	ifmr->ifm_active = mii->mii_media_active;
+	ifmr->ifm_status = mii->mii_media_status;
+
+	return;
+}
+
+int nge_ioctl(ifp, command, data)
+	struct ifnet		*ifp;
+	u_long			command;
+	caddr_t			data;
+{
+	struct nge_softc	*sc = ifp->if_softc;
+	struct ifreq		*ifr = (struct ifreq *) data;
+	struct ifaddr		*ifa = (struct ifaddr *)data;
+	struct mii_data		*mii;
+	int			s, error = 0;
+
+	s = splimp();
+
+	if ((error = ether_ioctl(ifp, &sc->arpcom, command, data)) > 0) {
+		splx(s);
+		return (error);
+       }
+
+	switch(command) {
+	case SIOCSIFADDR:
+		ifp->if_flags |= IFF_UP;
+		switch (ifa->ifa_addr->sa_family) {
+#ifdef INET
+		case AF_INET:
+			nge_init(sc);
+			arp_ifinit(&sc->arpcom, ifa);
+			break;
+#endif /* INET */
+		default:
+			nge_init(sc);
+			break;
+                }
+		break;
+	case SIOCSIFFLAGS:
+		if (ifp->if_flags & IFF_UP) {
+			if (ifp->if_flags & IFF_RUNNING &&
+			    ifp->if_flags & IFF_PROMISC &&
+			    !(sc->nge_if_flags & IFF_PROMISC)) {
+				NGE_SETBIT(sc, NGE_RXFILT_CTL,
+				    NGE_RXFILTCTL_ALLPHYS|
+				    NGE_RXFILTCTL_ALLMULTI);
+			} else if (ifp->if_flags & IFF_RUNNING &&
+			    !(ifp->if_flags & IFF_PROMISC) &&
+			    sc->nge_if_flags & IFF_PROMISC) {
+				NGE_CLRBIT(sc, NGE_RXFILT_CTL,
+				    NGE_RXFILTCTL_ALLPHYS);
+				if (!(ifp->if_flags & IFF_ALLMULTI))
+					NGE_CLRBIT(sc, NGE_RXFILT_CTL,
+					    NGE_RXFILTCTL_ALLMULTI);
+			} else {
+				ifp->if_flags &= ~IFF_RUNNING;
+				nge_init(sc);
+			}
+		} else {
+			if (ifp->if_flags & IFF_RUNNING)
+				nge_stop(sc);
+		}
+		sc->nge_if_flags = ifp->if_flags;
+		error = 0;
+		break;
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+		error = (command == SIOCADDMULTI)
+			? ether_addmulti(ifr, &sc->arpcom)
+			: ether_delmulti(ifr, &sc->arpcom);
+
+		if (error == ENETRESET) {
+			if (ifp->if_flags & IFF_RUNNING)
+				nge_setmulti(sc);
+			error = 0;
+		}
+		break;
+	case SIOCGIFMEDIA:
+	case SIOCSIFMEDIA:
+		mii = &sc->nge_mii;
+		error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+
+	(void)splx(s);
+
+	return(error);
+}
+
+void nge_watchdog(ifp)
+	struct ifnet		*ifp;
+{
+	struct nge_softc	*sc;
+
+	sc = ifp->if_softc;
+
+	ifp->if_oerrors++;
+	printf("%s: watchdog timeout\n", sc->sc_dv.dv_xname);
+
+	nge_stop(sc);
+	nge_reset(sc);
+	ifp->if_flags &= ~IFF_RUNNING;
+	nge_init(sc);
+
+	if (ifp->if_snd.ifq_head != NULL)
+		nge_start(ifp);
+
+	return;
+}
+
+/*
+ * Stop the adapter and free any mbufs allocated to the
+ * RX and TX lists.
+ */
+void nge_stop(sc)
+	struct nge_softc	*sc;
+{
+	register int		i;
+	struct ifnet		*ifp;
+	struct ifmedia_entry	*ifm;
+	struct mii_data		*mii = &sc->nge_mii;
+	int			mtmp, itmp;
+
+	ifp = &sc->arpcom.ac_if;
+	ifp->if_timer = 0;
+
+	timeout_del(&sc->nge_timeout);
+	CSR_WRITE_4(sc, NGE_IER, 0);
+	CSR_WRITE_4(sc, NGE_IMR, 0);
+	NGE_SETBIT(sc, NGE_CSR, NGE_CSR_TX_DISABLE|NGE_CSR_RX_DISABLE);
+	DELAY(1000);
+	CSR_WRITE_4(sc, NGE_TX_LISTPTR, 0);
+	CSR_WRITE_4(sc, NGE_RX_LISTPTR, 0);
+
+	/*
+	 * Isolate/power down the PHY, but leave the media selection
+	 * unchanged so that things will be put back to normal when
+	 * we bring the interface back up.
+	 */
+	itmp = ifp->if_flags;
+	ifp->if_flags |= IFF_UP;
+	ifm = mii->mii_media.ifm_cur;
+	mtmp = ifm->ifm_media;
+	ifm->ifm_media = IFM_ETHER|IFM_NONE;
+	mii_mediachg(mii);
+	ifm->ifm_media = mtmp;
+	ifp->if_flags = itmp;
+
+	sc->nge_link = 0;
+
+	/*
+	 * Free data in the RX lists.
+	 */
+	for (i = 0; i < NGE_RX_LIST_CNT; i++) {
+		if (sc->nge_ldata->nge_rx_list[i].nge_mbuf != NULL) {
+			m_freem(sc->nge_ldata->nge_rx_list[i].nge_mbuf);
+			sc->nge_ldata->nge_rx_list[i].nge_mbuf = NULL;
+		}
+	}
+	bzero((char *)&sc->nge_ldata->nge_rx_list,
+		sizeof(sc->nge_ldata->nge_rx_list));
+
+	/*
+	 * Free the TX list buffers.
+	 */
+	for (i = 0; i < NGE_TX_LIST_CNT; i++) {
+		if (sc->nge_ldata->nge_tx_list[i].nge_mbuf != NULL) {
+			m_freem(sc->nge_ldata->nge_tx_list[i].nge_mbuf);
+			sc->nge_ldata->nge_tx_list[i].nge_mbuf = NULL;
+		}
+	}
+
+	bzero((char *)&sc->nge_ldata->nge_tx_list,
+		sizeof(sc->nge_ldata->nge_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.
+ */
+void nge_shutdown(xsc)
+	void *xsc;
+{
+	struct nge_softc *sc = (struct nge_softc *)xsc;
+
+	nge_reset(sc);
+	nge_stop(sc);
+
+	return;
+}
+
+
+struct cfattach nge_ca = {
+	sizeof(struct nge_softc), nge_probe, nge_attach
+};
+
+struct cfdriver nge_cd = {
+	0, "nge", DV_IFNET
+};
diff --git a/sys/dev/pci/if_ngereg.h b/sys/dev/pci/if_ngereg.h
new file mode 100644
index 00000000000..7a7377f554b
--- /dev/null
+++ b/sys/dev/pci/if_ngereg.h
@@ -0,0 +1,702 @@
+/*	$OpenBSD: if_ngereg.h,v 1.1 2001/06/08 02:26:13 nate Exp $	*/
+/*
+ * Copyright (c) 2001 Wind River Systems
+ * Copyright (c) 1997, 1998, 1999, 2000, 2001
+ *	Bill Paul <wpaul@bsdi.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.
+ *
+ * $FreeBSD$
+ */
+
+#define NGE_CSR			0x00
+#define NGE_CFG			0x04
+#define NGE_MEAR		0x08
+#define NGE_PCITST		0x0C
+#define NGE_ISR			0x10
+#define NGE_IMR			0x14
+#define NGE_IER			0x18
+#define NGE_IHR			0x1C
+#define NGE_TX_LISTPTR_LO	0x20
+#define NGE_TX_LISTPTR_HI	0x24
+#define NGE_TX_LISTPTR		NGE_TX_LISTPTR_LO
+#define NGE_TX_CFG		0x28
+#define NGE_GPIO		0x2C
+#define NGE_RX_LISTPTR_LO	0x30
+#define NGE_RX_LISTPTR_HI	0x34
+#define NGE_RX_LISTPTR		NGE_RX_LISTPTR_LO
+#define NGE_RX_CFG		0x38
+#define NGE_PRIOQCTL		0x3C
+#define NGE_WOLCSR		0x40
+#define NGE_PAUSECSR		0x44
+#define NGE_RXFILT_CTL		0x48
+#define NGE_RXFILT_DATA		0x4C
+#define NGE_BOOTROM_ADDR	0x50
+#define NGE_BOOTROM_DATA	0x54
+#define NGE_SILICONREV		0x58
+#define NGE_MIBCTL		0x5C
+#define NGE_MIB_RXERRPKT	0x60
+#define NGE_MIB_RXERRFCS	0x64
+#define NGE_MIB_RXERRMISSEDPKT	0x68
+#define NGE_MIB_RXERRALIGN	0x6C
+#define NGE_MIB_RXERRSYM	0x70
+#define NGE_MIB_RXERRGIANT	0x74
+#define NGE_MIB_RXERRRANGLEN	0x78
+#define NGE_MIB_RXBADOPCODE	0x7C
+#define NGE_MIB_RXPAUSEPKTS	0x80
+#define NGE_MIB_TXPAUSEPKTS	0x84
+#define NGE_MIB_TXERRSQE	0x88
+#define NGE_TXPRIOQ_PTR1	0xA0
+#define NGE_TXPRIOQ_PTR2	0xA4
+#define NGE_TXPRIOQ_PTR3	0xA8
+#define NGE_RXPRIOQ_PTR1	0xB0
+#define NGE_RXPRIOQ_PTR2	0xB4
+#define NGE_RXPRIOQ_PTR3	0xB8
+#define NGE_VLAN_IP_RXCTL	0xBC
+#define NGE_VLAN_IP_TXCTL	0xC0
+#define NGE_VLAN_DATA		0xC4
+#define NGE_CLKRUN		0xCC
+#define NGE_TBI_BMCR		0xE0
+#define NGE_TBI_BMSR		0xE4
+#define NGE_TBI_ANAR		0xE8
+#define NGE_TBI_ANLPAR		0xEC
+#define NGE_TBI_ANER		0xF0
+#define NGE_TBI_ESR		0xF4
+
+/* Control/status register */
+#define NGE_CSR_TX_ENABLE	0x00000001
+#define NGE_CSR_TX_DISABLE	0x00000002
+#define NGE_CSR_RX_ENABLE	0x00000004
+#define NGE_CSR_RX_DISABLE	0x00000008
+#define NGE_CSR_TX_RESET	0x00000010
+#define NGE_CSR_RX_RESET	0x00000020
+#define NGE_CSR_SOFTINTR	0x00000080
+#define NGE_CSR_RESET		0x00000100
+#define NGE_CSR_TX_PRIOQ_ENB0	0x00000200
+#define NGE_CSR_TX_PRIOQ_ENB1	0x00000400
+#define NGE_CSR_TX_PRIOQ_ENB2	0x00000800
+#define NGE_CSR_TX_PRIOQ_ENB3	0x00001000
+#define NGE_CSR_RX_PRIOQ_ENB0	0x00002000
+#define NGE_CSR_RX_PRIOQ_ENB1	0x00004000
+#define NGE_CSR_RX_PRIOQ_ENB2	0x00008000
+#define NGE_CSR_RX_PRIOQ_ENB3	0x00010000
+
+/* Configuration register */
+#define NGE_CFG_BIGENDIAN	0x00000001
+#define NGE_CFG_EXT_125MHZ	0x00000002
+#define NGE_CFG_BOOTROM_DIS	0x00000004
+#define NGE_CFG_PERR_DETECT	0x00000008
+#define NGE_CFG_DEFER_DISABLE	0x00000010
+#define NGE_CFG_OUTOFWIN_TIMER	0x00000020
+#define NGE_CFG_SINGLE_BACKOFF	0x00000040
+#define NGE_CFG_PCIREQ_ALG	0x00000080
+#define NGE_CFG_EXTSTS_ENB	0x00000100
+#define NGE_CFG_PHY_DIS		0x00000200
+#define NGE_CFG_PHY_RST		0x00000400
+#define NGE_CFG_64BIT_ADDR_ENB	0x00000800
+#define NGE_CFG_64BIT_DATA_ENB	0x00001000
+#define NGE_CFG_64BIT_PCI_DET	0x00002000
+#define NGE_CFG_64BIT_TARG	0x00004000
+#define NGE_CFG_MWI_DIS		0x00008000
+#define NGE_CFG_MRM_DIS		0x00010000
+#define NGE_CFG_TMRTST		0x00020000
+#define NGE_CFG_PHYINTR_SPD	0x00040000
+#define NGE_CFG_PHYINTR_LNK	0x00080000
+#define NGE_CFG_PHYINTR_DUP	0x00100000
+#define NGE_CFG_MODE_1000	0x00400000
+#define NGE_CFG_DUPLEX_STS	0x10000000
+#define NGE_CFG_SPEED_STS	0x60000000
+#define NGE_CFG_LINK_STS	0x80000000
+
+/* MII/EEPROM control register */
+#define NGE_MEAR_EE_DIN		0x00000001
+#define NGE_MEAR_EE_DOUT	0x00000002
+#define NGE_MEAR_EE_CLK		0x00000004
+#define NGE_MEAR_EE_CSEL	0x00000008
+#define NGE_MEAR_MII_DATA	0x00000010
+#define NGE_MEAR_MII_DIR	0x00000020
+#define NGE_MEAR_MII_CLK	0x00000040
+
+#define NGE_EECMD_WRITE		0x140
+#define NGE_EECMD_READ		0x180
+#define NGE_EECMD_ERASE		0x1c0
+
+#define NGE_EE_NODEADDR		0xA
+
+/* PCI control register */
+#define NGE_PCICTL_SRAMADDR	0x0000001F
+#define NGE_PCICTL_RAMTSTENB	0x00000020
+#define NGE_PCICTL_TXTSTENB	0x00000040
+#define NGE_PCICTL_RXTSTENB	0x00000080
+#define NGE_PCICTL_BMTSTENB	0x00000200
+#define NGE_PCICTL_RAMADDR	0x001F0000
+#define NGE_PCICTL_ROMTIME	0x0F000000
+#define NGE_PCICTL_DISCTEST	0x40000000
+
+/* Interrupt/status register */
+#define NGE_ISR_RX_OK		0x00000001
+#define NGE_ISR_RX_DESC_OK	0x00000002
+#define NGE_ISR_RX_ERR		0x00000004
+#define NGE_ISR_RX_EARLY	0x00000008
+#define NGE_ISR_RX_IDLE		0x00000010
+#define NGE_ISR_RX_OFLOW	0x00000020
+#define NGE_ISR_TX_OK		0x00000040
+#define NGE_ISR_TX_DESC_OK	0x00000080
+#define NGE_ISR_TX_ERR		0x00000100
+#define NGE_ISR_TX_IDLE		0x00000200
+#define NGE_ISR_TX_UFLOW	0x00000400
+#define NGE_ISR_MIB_SERVICE	0x00000800
+#define NGE_ISR_SOFTINTR	0x00001000
+#define NGE_ISR_PME_EVENT	0x00002000
+#define NGE_ISR_PHY_INTR	0x00004000
+#define NGE_ISR_HIBITS		0x00008000
+#define NGE_ISR_RX_FIFO_OFLOW	0x00010000
+#define NGE_ISR_TGT_ABRT	0x00020000
+#define NGE_ISR_BM_ABRT		0x00040000
+#define NGE_ISR_SYSERR		0x00080000
+#define NGE_ISR_PARITY_ERR	0x00100000
+#define NGE_ISR_RX_RESET_DONE	0x00200000
+#define NGE_ISR_TX_RESET_DONE	0x00400000
+#define NGE_ISR_RX_PRIOQ_DESC0	0x00800000
+#define NGE_ISR_RX_PRIOQ_DESC1	0x01000000
+#define NGE_ISR_RX_PRIOQ_DESC2	0x02000000
+#define NGE_ISR_RX_PRIOQ_DESC3	0x04000000
+#define NGE_ISR_TX_PRIOQ_DESC0	0x08000000
+#define NGE_ISR_TX_PRIOQ_DESC1	0x10000000
+#define NGE_ISR_TX_PRIOQ_DESC2	0x20000000
+#define NGE_ISR_TX_PRIOQ_DESC3	0x40000000
+
+/* Interrupt mask register */
+#define NGE_IMR_RX_OK		0x00000001
+#define NGE_IMR_RX_DESC_OK	0x00000002
+#define NGE_IMR_RX_ERR		0x00000004
+#define NGE_IMR_RX_EARLY	0x00000008
+#define NGE_IMR_RX_IDLE		0x00000010
+#define NGE_IMR_RX_OFLOW	0x00000020
+#define NGE_IMR_TX_OK		0x00000040
+#define NGE_IMR_TX_DESC_OK	0x00000080
+#define NGE_IMR_TX_ERR		0x00000100
+#define NGE_IMR_TX_IDLE		0x00000200
+#define NGE_IMR_TX_UFLOW	0x00000400
+#define NGE_IMR_MIB_SERVICE	0x00000800
+#define NGE_IMR_SOFTINTR	0x00001000
+#define NGE_IMR_PME_EVENT	0x00002000
+#define NGE_IMR_PHY_INTR	0x00004000
+#define NGE_IMR_HIBITS		0x00008000
+#define NGE_IMR_RX_FIFO_OFLOW	0x00010000
+#define NGE_IMR_TGT_ABRT	0x00020000
+#define NGE_IMR_BM_ABRT		0x00040000
+#define NGE_IMR_SYSERR		0x00080000
+#define NGE_IMR_PARITY_ERR	0x00100000
+#define NGE_IMR_RX_RESET_DONE	0x00200000
+#define NGE_IMR_TX_RESET_DONE	0x00400000
+#define NGE_IMR_RX_PRIOQ_DESC0	0x00800000
+#define NGE_IMR_RX_PRIOQ_DESC1	0x01000000
+#define NGE_IMR_RX_PRIOQ_DESC2	0x02000000
+#define NGE_IMR_RX_PRIOQ_DESC3	0x04000000
+#define NGE_IMR_TX_PRIOQ_DESC0	0x08000000
+#define NGE_IMR_TX_PRIOQ_DESC1	0x10000000
+#define NGE_IMR_TX_PRIOQ_DESC2	0x20000000
+#define NGE_IMR_TX_PRIOQ_DESC3	0x40000000
+
+#define NGE_INTRS	\
+	(NGE_IMR_RX_OFLOW|NGE_IMR_TX_UFLOW|NGE_IMR_TX_OK|\
+	 NGE_IMR_TX_IDLE|NGE_IMR_RX_OK|NGE_IMR_RX_ERR|\
+	 NGE_IMR_SYSERR|NGE_IMR_PHY_INTR|NGE_IMR_RX_DESC_OK|NGE_IMR_TX_DESC_OK)
+
+/* Interrupt enable register */
+#define NGE_IER_INTRENB		0x00000001
+
+/* Interrupt moderation timer register */
+#define NGE_IHR_HOLDOFF		0x000000FF
+#define NGE_IHR_HOLDCTL		0x00000100
+
+/* Transmit configuration register */
+#define NGE_TXCFG_DRAIN_THRESH	0x000000FF /* 32-byte units */
+#define NGE_TXCFG_FILL_THRESH	0x0000FF00 /* 32-byte units */
+#define NGE_1000MB_BURST_DIS	0x00080000
+#define NGE_TXCFG_DMABURST	0x00700000
+#define NGE_TXCFG_ECRETRY	0x00800000
+#define NGE_TXCFG_AUTOPAD	0x10000000
+#define NGE_TXCFG_LOOPBK	0x20000000
+#define NGE_TXCFG_IGN_HBEAT	0x40000000
+#define NGE_TXCFG_IGN_CARR	0x80000000
+
+#define NGE_TXCFG_DRAIN(x)	(((x) >> 5) & NGE_TXCFG_DRAIN_THRESH)
+#define NGE_TXCFG_FILL(x)	((((x) >> 5) << 8) & NGE_TXCFG_FILL_THRESH)
+
+#define NGE_TXDMA_1024BYTES	0x00000000
+#define NGE_TXDMA_8BYTES	0x00100000
+#define NGE_TXDMA_16BYTES	0x00200000
+#define NGE_TXDMA_32BYTES	0x00300000
+#define NGE_TXDMA_64BYTES	0x00400000
+#define NGE_TXDMA_128BYTES	0x00500000
+#define NGE_TXDMA_256BYTES	0x00600000
+#define NGE_TXDMA_512BYTES	0x00700000
+
+#define NGE_TXCFG	\
+	(NGE_TXDMA_512BYTES|NGE_TXCFG_AUTOPAD|\
+	 NGE_TXCFG_FILL(64)|NGE_TXCFG_DRAIN(6400))
+
+/* GPIO register */
+#define NGE_GPIO_GP1_OUT	0x00000001
+#define NGE_GPIO_GP2_OUT	0x00000002
+#define NGE_GPIO_GP3_OUT	0x00000004
+#define NGE_GPIO_GP4_OUT	0x00000008
+#define NGE_GPIO_GP5_OUT	0x00000010
+#define NGE_GPIO_GP1_OUTENB	0x00000020
+#define NGE_GPIO_GP2_OUTENB	0x00000040
+#define NGE_GPIO_GP3_OUTENB	0x00000080
+#define NGE_GPIO_GP4_OUTENB	0x00000100
+#define NGE_GPIO_GP5_OUTENB	0x00000200
+#define NGE_GPIO_GP1_IN		0x00000400
+#define NGE_GPIO_GP2_IN		0x00000800
+#define NGE_GPIO_GP3_IN		0x00001000
+#define NGE_GPIO_GP4_IN		0x00002000
+#define NGE_GPIO_GP5_IN		0x00004000
+
+/* Receive configuration register */
+#define NGE_RXCFG_DRAIN_THRESH	0x0000003E /* 8-byte units */
+#define NGE_RXCFG_DMABURST	0x00700000
+#define NGE_RXCFG_RX_RANGEERR	0x04000000 /* accept in-range err frames */
+#define NGE_RXCFG_RX_GIANTS	0x08000000 /* accept packets > 1518 bytes */
+#define NGE_RXCFG_RX_FDX	0x10000000 /* full duplex receive */
+#define NGE_RXCFG_RX_NOCRC	0x20000000 /* strip CRC */
+#define NGE_RXCFG_RX_RUNT	0x40000000 /* accept short frames */
+#define NGE_RXCFG_RX_BADPKTS	0x80000000 /* accept error frames */
+
+#define NGE_RXCFG_DRAIN(x)	((((x) >> 3) << 1) & NGE_RXCFG_DRAIN_THRESH)
+
+#define NGE_RXDMA_1024BYTES	0x00000000
+#define NGE_RXDMA_8BYTES	0x00100000
+#define NGE_RXDMA_16BYTES	0x00200000
+#define NGE_RXDMA_32YTES	0x00300000
+#define NGE_RXDMA_64BYTES	0x00400000
+#define NGE_RXDMA_128BYTES	0x00500000
+#define NGE_RXDMA_256BYTES	0x00600000
+#define NGE_RXDMA_512BYTES	0x00700000
+
+#define NGE_RXCFG \
+	(NGE_RXCFG_DRAIN(64)|NGE_RXDMA_256BYTES|\
+	 NGE_RXCFG_RX_GIANTS|NGE_RXCFG_RX_NOCRC)
+
+/* Priority queue control */
+#define NGE_PRIOQCTL_TXPRIO_ENB	0x00000001
+#define NGE_PRIOQCTL_TXFAIR_ENB	0x00000002
+#define NGE_PRIOQCTL_RXPRIO	0x0000000C
+
+#define NGE_RXPRIOQ_DISABLED	0x00000000
+#define NGE_RXPRIOQ_TWOQS	0x00000004
+#define NGE_RXPRIOQ_THREEQS	0x00000008
+#define NGE_RXPRIOQ_FOURQS	0x0000000C
+
+/* Wake On LAN command/status register */
+#define NGE_WOLCSR_WAKE_ON_PHYINTR	0x00000001
+#define NGE_WOLCSR_WAKE_ON_UNICAST	0x00000002
+#define NGE_WOLCSR_WAKE_ON_MULTICAST	0x00000004
+#define NGR_WOLCSR_WAKE_ON_BROADCAST	0x00000008
+#define NGE_WOLCSR_WAKE_ON_ARP		0x00000010
+#define NGE_WOLCSR_WAKE_ON_PAT0_MATCH	0x00000020
+#define NGE_WOLCSR_WAKE_ON_PAT1_MATCH	0x00000040
+#define NGE_WOLCSR_WAKE_ON_PAT2_MATCH	0x00000080
+#define NGE_WOLCSR_WAKE_ON_PAT3_MATCH	0x00000100
+#define NGE_WOLCSR_SECUREON_ENB		0x00000200
+#define NGE_WOLCSR_SECUREON_HACK	0x00200000
+#define NGE_WOLCSR_PHYINTR		0x00400000
+#define NGE_WOLCSR_UNICAST		0x00800000
+#define NGE_WOLCSR_MULTICAST		0x01000000
+#define NGE_WOLCSR_BROADCAST		0x02000000
+#define NGE_WOLCSR_ARP_RCVD		0x04000000
+#define NGE_WOLCSR_PAT0_MATCH		0x08000000
+#define NGE_WOLCSR_PAT1_MATCH		0x10000000
+#define NGE_WOLCSR_PAT2_MATCH		0x20000000
+#define NGE_WOLCSR_PAT3_MATCH		0x40000000
+#define NGE_WOLCSR_MAGICPKT		0x80000000
+
+/* Pause control/status register */
+#define NGE_PAUSECSR_CNT		0x0000FFFF
+#define NGE_PAUSECSR_PFRAME_SENT	0x00020000
+#define NGE_PAUSECSR_RX_DATAFIFO_THR_LO	0x000C0000
+#define NGE_PAUSECSR_RX_DATAFIFO_THR_HI	0x00300000
+#define NGE_PAUSECSR_RX_STATFIFO_THR_LO	0x00C00000
+#define NGE_PAUSECSR_RX_STATFIFO_THR_HI	0x03000000
+#define NGE_PAUSECSR_PFRAME_RCVD	0x08000000
+#define NGE_PAUSECSR_PAUSE_ACTIVE	0x10000000
+#define NGE_PAUSECSR_PAUSE_ON_DA	0x20000000 /* pause on direct addr */
+#define NGE_PAUSECSR_PAUSE_ON_MCAST	0x40000000 /* pause on mcast */
+#define NGE_PAUSECSR_PAUSE_ENB		0x80000000
+
+/* Receive filter/match control message */
+#define MGE_RXFILTCTL_ADDR	0x000003FF
+#define NGE_RXFILTCTL_ULMASK	0x00080000
+#define NGE_RXFILTCTL_UCHASH	0x00100000
+#define NGE_RXFILTCTL_MCHASH	0x00200000
+#define NGE_RXFILTCTL_ARP	0x00400000
+#define NGE_RXFILTCTL_PMATCH0	0x00800000
+#define NGE_RXFILTCTL_PMATCH1	0x01000000
+#define NGE_RXFILTCTL_PMATCH2	0x02000000
+#define NGE_RXFILTCTL_PMATCH3	0x04000000
+#define NGE_RXFILTCTL_PERFECT	0x08000000
+#define NGE_RXFILTCTL_ALLPHYS	0x10000000
+#define NGE_RXFILTCTL_ALLMULTI	0x20000000
+#define NGE_RXFILTCTL_BROAD	0x40000000
+#define NGE_RXFILTCTL_ENABLE	0x80000000
+
+
+#define NGE_FILTADDR_PAR0	0x00000000
+#define NGE_FILTADDR_PAR1	0x00000002
+#define NGE_FILTADDR_PAR2	0x00000004
+#define NGE_FILTADDR_PMATCH0	0x00000006
+#define NGE_FILTADDR_PMATCH1	0x00000008
+#define NGE_FILTADDR_SOPASS0	0x0000000A
+#define NGE_FILTADDR_SOPASS1	0x0000000C
+#define NGE_FILTADDR_SOPASS2	0x0000000E
+#define NGE_FILTADDR_FMEM_LO	0x00000100
+#define NGE_FILTADDR_FMEM_HI	0x000003FE
+#define NGE_FILTADDR_MCAST_LO	0x00000100 /* start of multicast filter */
+#define NGE_FILTADDR_MCAST_HI	0x000001FE /* end of multicast filter */
+#define NGE_MCAST_FILTER_LEN	256	   /* bytes */
+#define NGE_FILTADDR_PBUF0	0x00000200 /* pattern buffer 0 */
+#define NGE_FILTADDR_PBUF1	0x00000280 /* pattern buffer 1 */
+#define NGE_FILTADDR_PBUF2	0x00000300 /* pattern buffer 2 */
+#define NGE_FILTADDR_PBUF3	0x00000380 /* pattern buffer 3 */
+
+/* MIB control register */
+#define NGE_MIBCTL_WARNTEST	0x00000001
+#define NGE_MIBCTL_FREEZE_CNT	0x00000002
+#define NGE_MIBCTL_CLEAR_CNT	0x00000004
+#define NGE_MIBCTL_STROBE_CNT	0x00000008
+
+/* VLAN/IP RX control register */
+#define NGE_VIPRXCTL_TAG_DETECT_ENB	0x00000001
+#define NGE_VIPRXCTL_TAG_STRIP_ENB	0x00000002
+#define NGE_VIPRXCTL_DROP_TAGGEDPKTS	0x00000004
+#define NGE_VIPRXCTL_DROP_UNTAGGEDPKTS	0x00000008
+#define NGE_VIPRXCTL_IPCSUM_ENB		0x00000010
+#define NGE_VIPRXCTL_REJECT_BADIPCSUM	0x00000020
+#define NGE_VIPRXCTL_REJECT_BADTCPCSUM	0x00000040
+#define NGE_VIPRXCTL_REJECT_BADUDPCSUM	0x00000080
+
+/* VLAN/IP TX control register */
+#define NGE_VIPTXCTL_TAG_ALL		0x00000001
+#define NGE_VIPTXCTL_TAG_PER_PKT	0x00000002
+#define NGE_VIPTXCTL_CSUM_ALL		0x00000004
+#define NGE_VIPTXCTL_CSUM_PER_PKT	0x00000008
+
+/* VLAN data register */
+#define NGE_VLANDATA_VTYPE	0x0000FFFF
+#define NGE_VLANDATA_VTCI	0xFFFF0000
+
+/* Clockrun register */
+#define NGE_CLKRUN_PMESTS	0x00008000
+#define NGE_CLKRUN_PMEENB	0x00000100
+#define NGE_CLNRUN_CLKRUN_ENB	0x00000001
+
+
+/* TBI BMCR */
+#define NGE_TBIBMCR_RESTART_ANEG	0x00000200
+#define NGE_TBIBMCR_ENABLE_ANEG		0x00001000
+#define NGE_TBIBMCR_LOOPBACK		0x00004000
+
+/* TBI BMSR */
+#define NGE_TBIBMSR_ANEG_DONE	0x00000004
+#define NGE_TBIBMSR_LINKSTAT	0x00000020
+
+/* TBI ANAR */
+#define NGE_TBIANAR_HDX		0x00000020
+#define NGE_TBIANAR_FDX		0x00000040
+#define NGE_TBIANAR_PCAP	0x00000180
+#define NGE_TBIANAR_REMFAULT	0x00003000
+#define NGE_TBIANAR_NEXTPAGE	0x00008000
+
+/* TBI ANLPAR */
+#define NGE_TBIANLPAR_HDX	0x00000020
+#define NGE_TBIANLPAR_FDX	0x00000040
+#define NGE_TBIANLPAR_PCAP	0x00000180
+#define NGE_TBIANLPAR_REMFAULT	0x00003000
+#define NGE_TBIANLPAR_NEXTPAGE	0x00008000
+
+/* TBI ANER */
+#define NGE_TBIANER_PAGERCVD	0x00000002
+#define NGE_TBIANER_NEXTPGABLE	0x00000004
+
+/* TBI EXTSTS */
+#define NGE_TBIEXTSTS_HXD	0x00004000
+#define NGE_TBIEXTSTS_FXD	0x00008000
+
+/*
+ * DMA descriptor structures. The RX and TX descriptor formats are
+ * deliberately designed to be similar to facilitate passing them between
+ * RX and TX queues on multiple controllers, in the case where you have
+ * multiple MACs in a switching configuration. With the 83820, the pointer
+ * values can be either 64 bits or 32 bits depending on how the chip is
+ * configured. For the 83821, the fields are always 32-bits. There is
+ * also an optional extended status field for VLAN and TCP/IP checksum
+ * functions. We use the checksum feature so we enable the use of this
+ * field. Descriptors must be 64-bit aligned.
+ * After this, we include some additional structure members for
+ * use by the driver. Note that for this structure will be a different
+ * size on the alpha, but that's okay as long as it's a multiple of 4
+ * bytes in size. 
+ *
+ */
+struct nge_desc_64 {
+	/* Hardware descriptor section */
+	u_int32_t		nge_next_lo;
+	u_int32_t		nge_next_hi;
+	u_int32_t		nge_ptr_lo;
+	u_int32_t		nge_ptr_hi;
+	u_int32_t		nge_cmdsts;
+#define nge_rxstat		nge_cmdsts
+#define nge_txstat		nge_cmdsts
+#define nge_ctl			nge_cmdsts
+	u_int32_t		nge_extsts;
+	/* Driver software section */
+	struct mbuf		*nge_mbuf;
+	struct nge_desc_64	*nge_nextdesc;
+};
+
+struct nge_desc_32 {
+	/* Hardware descriptor section */
+	u_int32_t		nge_next;
+	u_int32_t		nge_ptr;
+	u_int32_t		nge_cmdsts;
+#define nge_rxstat		nge_cmdsts
+#define nge_txstat		nge_cmdsts
+#define nge_ctl			nge_cmdsts
+	u_int32_t		nge_extsts;
+	/* Driver software section */
+	struct mbuf		*nge_mbuf;
+	struct nge_desc_32	*nge_nextdesc;
+};
+
+#define nge_desc	nge_desc_32
+
+#define NGE_CMDSTS_BUFLEN	0x0000FFFF
+#define NGE_CMDSTS_PKT_OK	0x08000000
+#define NGE_CMDSTS_CRC		0x10000000
+#define NGE_CMDSTS_INTR		0x20000000
+#define NGE_CMDSTS_MORE		0x40000000
+#define NGE_CMDSTS_OWN		0x80000000
+
+#define NGE_LASTDESC(x)		(!((x)->nge_ctl & NGE_CMDSTS_MORE)))
+#define NGE_OWNDESC(x)		((x)->nge_ctl & NGE_CMDSTS_OWN)
+#define NGE_INC(x, y)		(x) = (x + 1) % y
+#define NGE_RXBYTES(x)		((x)->nge_ctl & NGE_CMDSTS_BUFLEN)
+
+#define NGE_RXSTAT_RANGELENERR	0x00010000
+#define NGE_RXSTAT_LOOPBK	0x00020000
+#define NGE_RXSTAT_ALIGNERR	0x00040000
+#define NGE_RXSTAT_CRCERR	0x00080000
+#define NGE_RXSTAT_SYMBOLERR	0x00100000
+#define NGE_RXSTAT_RUNT		0x00200000
+#define NGE_RXSTAT_GIANT	0x00400000
+#define NGE_RXSTAT_DSTCLASS	0x01800000
+#define NGE_RXSTAT_OVERRUN	0x02000000
+#define NGE_RXSTAT_RX_ABORT	0x04000000
+
+#define NGE_DSTCLASS_REJECT	0x00000000
+#define NGE_DSTCLASS_UNICAST	0x00800000
+#define NGE_DSTCLASS_MULTICAST	0x01000000
+#define NGE_DSTCLASS_BROADCAST	0x02000000
+
+#define NGE_TXSTAT_COLLCNT	0x000F0000
+#define NGE_TXSTAT_EXCESSCOLLS	0x00100000
+#define NGE_TXSTAT_OUTOFWINCOLL	0x00200000
+#define NGE_TXSTAT_EXCESS_DEFER	0x00400000
+#define NGE_TXSTAT_DEFERED	0x00800000
+#define NGE_TXSTAT_CARR_LOST	0x01000000
+#define NGE_TXSTAT_UNDERRUN	0x02000000
+#define NGE_TXSTAT_TX_ABORT	0x04000000
+
+#define NGE_TXEXTSTS_VLAN_TCI	0x0000FFFF
+#define NGE_TXEXTSTS_VLANPKT	0x00010000
+#define NGE_TXEXTSTS_IPCSUM	0x00020000
+#define NGE_TXEXTSTS_TCPCSUM	0x00080000
+#define NGE_TXEXTSTS_UDPCSUM	0x00200000
+
+#define NGE_RXEXTSTS_VTCI	0x0000FFFF
+#define NGE_RXEXTSTS_VLANPKT	0x00010000
+#define NGE_RXEXTSTS_IPPKT	0x00020000
+#define NGE_RXEXTSTS_IPCSUMERR	0x00040000
+#define NGE_RXEXTSTS_TCPPKT	0x00080000
+#define NGE_RXEXTSTS_TCPCSUMERR	0x00100000
+#define NGE_RXEXTSTS_UDPPKT	0x00200000
+#define NGE_RXEXTSTS_UDPCSUMERR	0x00400000
+
+#define NGE_RX_LIST_CNT		64
+#define NGE_TX_LIST_CNT		128
+
+struct nge_list_data {
+	struct nge_desc		nge_rx_list[NGE_RX_LIST_CNT];
+	struct nge_desc		nge_tx_list[NGE_TX_LIST_CNT];
+};
+
+
+/*
+ * NatSemi PCI vendor ID.
+ */
+#define NGE_VENDORID		0x100B
+
+/*
+ * 83820/83821 PCI device IDs
+ */
+#define NGE_DEVICEID		0x0022
+
+struct nge_type {
+	u_int16_t		nge_vid;
+	u_int16_t		nge_did;
+	char			*nge_name;
+};
+
+struct nge_mii_frame {
+	u_int8_t		mii_stdelim;
+	u_int8_t		mii_opcode;
+	u_int8_t		mii_phyaddr;
+	u_int8_t		mii_regaddr;
+	u_int8_t		mii_turnaround;
+	u_int16_t		mii_data;
+};
+
+/*
+ * MII constants
+ */
+#define NGE_MII_STARTDELIM	0x01
+#define NGE_MII_READOP		0x02
+#define NGE_MII_WRITEOP		0x01
+#define NGE_MII_TURNAROUND	0x02
+
+#define NGE_JUMBO_FRAMELEN	9018
+#define NGE_JUMBO_MTU		(NGE_JUMBO_FRAMELEN-ETHER_HDR_LEN-ETHER_CRC_LEN)
+#define NGE_JSLOTS		384
+
+#define NGE_JRAWLEN (NGE_JUMBO_FRAMELEN + ETHER_ALIGN + sizeof(u_int64_t))
+#define NGE_JLEN (NGE_JRAWLEN  + (sizeof(u_int64_t) - \
+	(NGE_JRAWLEN % sizeof(u_int64_t))))
+#define NGE_MCLBYTES (NGE_JLEN - sizeof(u_int64_t))
+#define NGE_JPAGESZ PAGE_SIZE
+#define NGE_RESID (NGE_JPAGESZ - (NGE_JLEN * NGE_JSLOTS) % NGE_JPAGESZ)
+#define NGE_JMEM ((NGE_JLEN * NGE_JSLOTS) + NGE_RESID)
+
+struct nge_jslot {
+	caddr_t			nge_buf;
+	int			nge_inuse;
+};
+
+struct nge_jpool_entry {
+	int				slot;
+	LIST_ENTRY(nge_jpool_entry)	jpool_entries;
+};
+
+struct nge_ring_data {
+	int			nge_rx_prod;
+	int			nge_tx_prod;
+	int			nge_tx_cons;
+	int			nge_tx_cnt;
+	/* Stick the jumbo mem management stuff here too. */
+	struct nge_jslot	nge_jslots[NGE_JSLOTS];
+	void			*nge_jumbo_buf;
+};
+
+struct nge_softc {
+	struct device		sc_dv;
+	struct arpcom		arpcom;		/* interface info */
+	bus_space_handle_t	nge_bhandle;
+	bus_space_tag_t		nge_btag;
+	void			*nge_intrhand;
+	struct mii_data		nge_mii;
+	int			nge_if_flags;
+	u_int8_t		nge_type;
+	u_int8_t		nge_link;
+	u_int8_t		nge_width;
+	bus_dma_tag_t		sc_dmatag;
+#define NGE_WIDTH_32BITS	0
+#define NGE_WIDTH_64BITS	1
+	struct nge_list_data	*nge_ldata;
+	struct nge_ring_data	nge_cdata;
+	struct timeout		nge_timeout;
+	LIST_HEAD(__nge_jfreehead, nge_jpool_entry)	nge_jfree_listhead;
+	LIST_HEAD(__nge_jinusehead, nge_jpool_entry)	nge_jinuse_listhead;
+};
+
+/*
+ * register space access macros
+ */
+#define CSR_WRITE_4(sc, reg, val)	\
+	bus_space_write_4(sc->nge_btag, sc->nge_bhandle, reg, val)
+
+#define CSR_READ_4(sc, reg)		\
+	bus_space_read_4(sc->nge_btag, sc->nge_bhandle, reg)
+
+#define NGE_TIMEOUT		1000
+#define ETHER_ALIGN		2
+#define NGE_RXLEN		1536
+#define NGE_MIN_FRAMELEN	60
+
+/*
+ * PCI low memory base and low I/O base register, and
+ * other PCI registers.
+ */
+
+#define NGE_PCI_VENDOR_ID	0x00
+#define NGE_PCI_DEVICE_ID	0x02
+#define NGE_PCI_COMMAND		0x04
+#define NGE_PCI_STATUS		0x06
+#define NGE_PCI_REVID		0x08
+#define NGE_PCI_CLASSCODE	0x09
+#define NGE_PCI_CACHELEN	0x0C
+#define NGE_PCI_LATENCY_TIMER	0x0D
+#define NGE_PCI_HEADER_TYPE	0x0E
+#define NGE_PCI_LOIO		0x10
+#define NGE_PCI_LOMEM		0x14
+#define NGE_PCI_BIOSROM		0x30
+#define NGE_PCI_INTLINE		0x3C
+#define NGE_PCI_INTPIN		0x3D
+#define NGE_PCI_MINGNT		0x3E
+#define NGE_PCI_MINLAT		0x0F
+#define NGE_PCI_RESETOPT	0x48
+#define NGE_PCI_EEPROM_DATA	0x4C
+
+/* power management registers */
+#define NGE_PCI_CAPID		0x50 /* 8 bits */
+#define NGE_PCI_NEXTPTR		0x51 /* 8 bits */
+#define NGE_PCI_PWRMGMTCAP	0x52 /* 16 bits */
+#define NGE_PCI_PWRMGMTCTRL	0x54 /* 16 bits */
+
+#define NGE_PSTATE_MASK		0x0003
+#define NGE_PSTATE_D0		0x0000
+#define NGE_PSTATE_D1		0x0001
+#define NGE_PSTATE_D2		0x0002
+#define NGE_PSTATE_D3		0x0003
+#define NGE_PME_EN		0x0010
+#define NGE_PME_STATUS		0x8000
+
+#ifdef __alpha__
+#undef vtophys
+#define vtophys(va)		alpha_XXX_dmamap((vm_offset_t)va)
+#endif