2006-01-22 Thomas Schwinge <tschwinge@gnu.org>

* configure, i386/configure, i386/linux/configure, linux/configure,
	i386/linux/device-drivers.h.in: Regenerated.

	* linux/src/drivers/net/ne2k-pci.c: Resolve conflicts.

2006-01-22  Guillem Jover  <guillem@hadrons.org>

	* i386/linux/configure.ac: Renamed winbond-840 driver to winbond_840.
	Enable the starfire, intel_gige and natsemi network drivers.  Remove
	"CONFIG_" from cb_chim, starfire, sundance, winbond840, hamachi,
	natsemi, myson803 and ns820 driver declarations.  Replace INTER_GIGE
	with INTEL_GIGE.
	* linux/dev/drivers/net/Space.c: Add conditional probes for natsemi,
	ns820, winbond840, hamachi, sundance, starfire, myson803 and intel-gige
	drivers.

	* linux/src/include/asm-i386/cache.h: New file from linux 2.2.26.
	* linux/dev/include/linux/malloc.h: Include <asm/cache.h>.

	* linux/src/drivers/net/ns820.c (netsami_drv_id): Renamed to ...
	(ns820_drv_id): ... this.  Fix all callers.
	* linux/src/drivers/net/intel-gige.c
	(skel_netdev_probe): Renamed to ...
	(igige_probe): ... this.
	* linux/dev/drivers/net/eepro100.c: Remove obsoleted file.
	* linux/src/drivers/net/eepro100.c (pci_id_tbl): Add PCI ID's from
	linux-2.6.14-rc4.

2006-01-22  Alfred M. Szmidt  <ams@gnu.org>

	* i386/linux/configure.ac: Added `pci-scan.o' to the network driver
	class.  (ns820, myson803, sundance, winbond-840, hamachi): New drivers.
	* i386/linux/Makefile.in (linux-net-files): Added `cb_shim.c',
	`hamachi.c', `intel-gige.c', `myson803.c', `natsemi.c', `ns820.c',
	`starfire.c', `sundance.c', `winbond-840.c' and `pci-scan.c'.

	* linux/dev/include/linux/modversions.h: New file.

	* linux/src/drivers/net/cb_shim.c, linux/src/drivers/net/hamachi.c,
	linux/src/drivers/net/intel-gige.c, linux/src/drivers/net/myson803.c,
	linux/src/drivers/net/natsemi.c, linux/src/drivers/net/ns820.c,
	linux/src/drivers/net/starfire.c, linux/src/drivers/net/sundance.c,
	linux/src/drivers/net/winbond-840.c,
	linux/src/drivers/net/kern_compat.h, linux/src/drivers/net/pci-scan.c,
	linux/src/drivers/net/pci-scan.h: New files from netdrivers 3.5 package
	(http://www.scyld.com/network).

	* linux/src/drivers/net/3c59x.c, linux/src/drivers/net/eepro100.c,
	linux/src/drivers/net/epic100.c, linux/src/drivers/net/ne2k-pci.c,
	linux/src/drivers/net/rtl8139.c, linux/src/drivers/net/tulip.c,
	linux/src/drivers/net/via-rhine.c, linux/src/drivers/net/yellowfin.c:
	Updated files from netdrivers 3.5 (http://www.scyld.com/network).

1 files changed, 1315 insertions, 0 deletions

diff --git a/linux/src/drivers/net/hamachi.c b/linux/src/drivers/net/hamachi.c
new file mode 100644
index 0000000..fdcf43d
--- /dev/null
+++ b/linux/src/drivers/net/hamachi.c
@@ -0,0 +1,1315 @@
+/* hamachi.c: A Packet Engines GNIC-II Gigabit Ethernet driver for Linux. */
+/*
+	Written 1998-2002 by Donald Becker.
+
+	This software may be used and distributed according to the terms of
+	the GNU General Public License (GPL), incorporated herein by reference.
+	Drivers based on or derived from this code fall under the GPL and must
+	retain the authorship, copyright and license notice.  This file is not
+	a complete program and may only be used when the entire operating
+	system is licensed under the GPL.
+
+	The author may be reached as becker@scyld.com, or C/O
+	Scyld Computing Corporation
+	410 Severn Ave., Suite 210
+	Annapolis MD 21403
+
+	This driver is for the Packet Engines GNIC-II PCI Gigabit Ethernet
+	adapter.
+
+	Support and updates available at
+	http://www.scyld.com/network/hamachi.html
+*/
+
+/* These identify the driver base version and may not be removed. */
+static const char version1[] =
+"hamachi.c:v1.04 11/17/2002  Written by Donald Becker <becker@scyld.com>\n";
+static const char version2[] =
+"  http://www.scyld.com/network/hamachi.html\n";
+
+/* Automatically extracted configuration info:
+probe-func: hamachi_probe
+config-in: tristate 'Packet Engines "Hamachi" PCI Gigabit Ethernet support' CONFIG_HAMACHI
+c-help-name: Packet Engines "Hamachi" PCI Gigabit Ethernet support
+c-help-symbol: CONFIG_HAMACHI
+c-help: This driver is for the Packet Engines "Hamachi" GNIC-2 Gigabit Ethernet
+c-help: adapter.
+c-help: Usage information and updates are available from
+c-help: http://www.scyld.com/network/hamachi.html
+*/
+
+/* The user-configurable values.
+   These may be modified when a driver module is loaded.*/
+
+/* Message enable level: 0..31 = no..all messages.  See NETIF_MSG docs. */
+static int debug = 2;
+
+/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
+static int max_interrupt_work = 40;
+
+/* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
+   The Hamachi has a 64 element perfect filter.  */
+static int multicast_filter_limit = 32;
+
+/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
+   Setting to > 1518 effectively disables this feature. */
+static int rx_copybreak = 0;
+
+/* A override for the hardware detection of bus width.
+   Set to 1 to force 32 bit PCI bus detection.  Set to 4 to force 64 bit.
+   Add 2 to disable parity detection.
+*/
+static int force32 = 0;
+
+/* Used to pass the media type, etc.
+   These exist for driver interoperability.
+   Only 1 Gigabit is supported by the chip.
+*/
+#define MAX_UNITS 8		/* More are supported, limit only on options */
+static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+
+/* Operational parameters that are set at compile time. */
+
+/* Keep the ring sizes a power of two for compile efficiency.
+   The compiler will convert <unsigned>'%'<2^N> into a bit mask.
+   Making the Tx ring too large decreases the effectiveness of channel
+   bonding and packet priority.
+   There are no ill effects from too-large receive rings. */
+#define TX_RING_SIZE	64
+#define TX_QUEUE_LEN	60		/* Limit ring entries actually used.  */
+#define RX_RING_SIZE	128
+
+/* Operational parameters that usually are not changed. */
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT  (6*HZ)
+
+/* Allocation size of Rx buffers with normal sized Ethernet frames.
+   Do not change this value without good reason.  This is not a limit,
+   but a way to keep a consistent allocation size among drivers.
+ */
+#define PKT_BUF_SZ		1536
+
+#ifndef __KERNEL__
+#define __KERNEL__
+#endif
+#if !defined(__OPTIMIZE__)
+#warning  You must compile this file with the correct options!
+#warning  See the last lines of the source file.
+#error You must compile this driver with "-O".
+#endif
+
+#include <linux/config.h>
+#if defined(CONFIG_SMP) && ! defined(__SMP__)
+#define __SMP__
+#endif
+#if defined(MODULE) && defined(CONFIG_MODVERSIONS) && ! defined(MODVERSIONS)
+#define MODVERSIONS
+#endif
+
+#include <linux/version.h>
+#if defined(MODVERSIONS)
+#include <linux/modversions.h>
+#endif
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#if LINUX_VERSION_CODE >= 0x20400
+#include <linux/slab.h>
+#else
+#include <linux/malloc.h>
+#endif
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <asm/processor.h>		/* Processor type for cache alignment. */
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/unaligned.h>
+
+#ifdef INLINE_PCISCAN
+#include "k_compat.h"
+#else
+#include "pci-scan.h"
+#include "kern_compat.h"
+#endif
+
+/* Condensed operations for readability. */
+#if ADDRLEN == 64
+#define virt_to_desc(addr)  cpu_to_le64(virt_to_bus(addr))
+#else
+#define virt_to_desc(addr)  cpu_to_le32(virt_to_bus(addr))
+#define le32desc_to_virt(addr)  bus_to_virt(le32_to_cpu(addr))
+#endif
+
+#if (LINUX_VERSION_CODE >= 0x20100)  &&  defined(MODULE)
+char kernel_version[] = UTS_RELEASE;
+#endif
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
+MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
+MODULE_LICENSE("GPL");
+MODULE_PARM(debug, "i");
+MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
+MODULE_PARM(rx_copybreak, "i");
+MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
+MODULE_PARM(multicast_filter_limit, "i");
+MODULE_PARM(max_interrupt_work, "i");
+MODULE_PARM(force32, "i");
+MODULE_PARM_DESC(debug, "Driver message level (0-31)");
+MODULE_PARM_DESC(options, "Force transceiver type or fixed speed+duplex");
+MODULE_PARM_DESC(max_interrupt_work,
+				 "Driver maximum events handled per interrupt");
+MODULE_PARM_DESC(full_duplex,
+				 "Non-zero to force full duplex, non-negotiated link "
+				 "(unused, deprecated).");
+MODULE_PARM_DESC(rx_copybreak,
+				 "Breakpoint in bytes for copy-only-tiny-frames");
+MODULE_PARM_DESC(multicast_filter_limit,
+				 "Multicast addresses before switching to Rx-all-multicast");
+MODULE_PARM_DESC(force32, "Set to 1 to force 32 bit PCI bus use.");
+
+/*
+				Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the Packet Engines "Hamachi"
+Gigabit Ethernet chip.  The only PCA currently supported is the GNIC-II 64-bit
+66Mhz PCI card.
+
+II. Board-specific settings
+
+No jumpers exist on the board.  The chip supports software correction of
+various motherboard wiring errors, however this driver does not support
+that feature.
+
+III. Driver operation
+
+IIIa. Ring buffers
+
+The Hamachi uses a typical descriptor based bus-master architecture.
+The descriptor list is similar to that used by the Digital Tulip.
+This driver uses two statically allocated fixed-size descriptor lists
+formed into rings by a branch from the final descriptor to the beginning of
+the list.  The ring sizes are set at compile time by RX/TX_RING_SIZE.
+
+This driver uses a zero-copy receive and transmit scheme similar my other
+network drivers.
+The driver allocates full frame size skbuffs for the Rx ring buffers at
+open() time and passes the skb->data field to the Hamachi as receive data
+buffers.  When an incoming frame is less than RX_COPYBREAK bytes long,
+a fresh skbuff is allocated and the frame is copied to the new skbuff.
+When the incoming frame is larger, the skbuff is passed directly up the
+protocol stack and replaced by a newly allocated skbuff.
+
+The RX_COPYBREAK value is chosen to trade-off the memory wasted by
+using a full-sized skbuff for small frames vs. the copying costs of larger
+frames.  Gigabit cards are typically used on generously configured machines
+and the underfilled buffers have negligible impact compared to the benefit of
+a single allocation size, so the default value of zero results in never
+copying packets.
+
+IIIb/c. Transmit/Receive Structure
+
+The Rx and Tx descriptor structure are straight-forward, with no historical
+baggage that must be explained.  Unlike the awkward DBDMA structure, there
+are no unused fields or option bits that had only one allowable setting.
+
+Two details should be noted about the descriptors: The chip supports both 32
+bit and 64 bit address structures, and the length field is overwritten on
+the receive descriptors.  The descriptor length is set in the control word
+for each channel. The development driver uses 32 bit addresses only, however
+64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
+
+IIId. Synchronization
+
+This driver is very similar to my other network drivers.
+The driver runs as two independent, single-threaded flows of control.  One
+is the send-packet routine, which enforces single-threaded use by the
+dev->tbusy flag.  The other thread is the interrupt handler, which is single
+threaded by the hardware and other software.
+
+The send packet thread has partial control over the Tx ring and 'dev->tbusy'
+flag.  It sets the tbusy flag whenever it's queuing a Tx packet. If the next
+queue slot is empty, it clears the tbusy flag when finished otherwise it sets
+the 'hmp->tx_full' flag.
+
+The interrupt handler has exclusive control over the Rx ring and records stats
+from the Tx ring.  After reaping the stats, it marks the Tx queue entry as
+empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it
+clears both the tx_full and tbusy flags.
+
+IV. Notes
+
+Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards.
+
+IVb. References
+
+Hamachi Engineering Design Specification, 5/15/97
+(Note: This version was marked "Confidential".)
+
+IVc. Errata
+
+None noted.
+*/
+
+
+/* The table for PCI detection and activation. */
+
+static void *hamachi_probe1(struct pci_dev *pdev, void *init_dev,
+							long ioaddr, int irq, int chip_idx, int find_cnt);
+enum chip_capability_flags { CanHaveMII=1, };
+
+static struct pci_id_info pci_id_tbl[] = {
+	{"Packet Engines GNIC-II \"Hamachi\"", { 0x09111318, 0xffffffff,},
+	 PCI_USES_MEM | PCI_USES_MASTER | PCI_ADDR0 | PCI_ADDR_64BITS, 0x400, 0, },
+	{ 0,},
+};
+
+struct drv_id_info hamachi_drv_id = {
+	"hamachi", 0, PCI_CLASS_NETWORK_ETHERNET<<8, pci_id_tbl,
+	hamachi_probe1, 0,
+};
+
+/* Offsets to the Hamachi registers.  Various sizes. */
+enum hamachi_offsets {
+	TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10,
+	RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30,
+	PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B,
+	LEDCtrl=0x06C, VirtualJumpers=0x06D,
+	TxChecksum=0x074, RxChecksum=0x076,
+	TxIntrCtrl=0x078, RxIntrCtrl=0x07C,
+	InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088,
+	EventStatus=0x08C,
+	MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4,
+	/* See enum MII_offsets below. */
+	MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE,
+	AddrMode=0x0D0, StationAddr=0x0D2,
+	/* Gigabit AutoNegotiation. */
+	ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8,
+	ANLinkPartnerAbility=0x0EA,
+	EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2,
+	FIFOcfg=0x0F8,
+};
+
+/* Offsets to the MII-mode registers. */
+enum MII_offsets {
+	MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC,
+	MII_Status=0xAE,
+};
+
+/* Bits in the interrupt status/mask registers. */
+enum intr_status_bits {
+	IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04,
+	IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400,
+	LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, };
+
+/* The Hamachi Rx and Tx buffer descriptors. */
+struct hamachi_desc {
+	u32 status_n_length;
+#if ADDRLEN == 64
+	u32 pad;
+	u64 addr;
+#else
+	u32 addr;
+#endif
+};
+
+/* Bits in hamachi_desc.status */
+enum desc_status_bits {
+	DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000,
+	DescIntr=0x10000000,
+};
+
+#define PRIV_ALIGN	15 	/* Required alignment mask */
+struct hamachi_private {
+	/* Descriptor rings first for alignment.  Tx requires a second descriptor
+	   for status. */
+	struct hamachi_desc rx_ring[RX_RING_SIZE];
+	struct hamachi_desc tx_ring[TX_RING_SIZE];
+	/* The addresses of receive-in-place skbuffs. */
+	struct sk_buff* rx_skbuff[RX_RING_SIZE];
+	/* The saved address of a sent-in-place packet/buffer, for skfree(). */
+	struct sk_buff* tx_skbuff[TX_RING_SIZE];
+	struct net_device *next_module;
+	void *priv_addr;					/* Unaligned address for kfree */
+	struct net_device_stats stats;
+	struct timer_list timer;	/* Media monitoring timer. */
+	int chip_id, drv_flags;
+	struct pci_dev *pci_dev;
+
+	/* Frequently used and paired value: keep adjacent for cache effect. */
+	int msg_level;
+	int max_interrupt_work;
+	long in_interrupt;
+
+	struct hamachi_desc *rx_head_desc;
+	unsigned int cur_rx, dirty_rx;		/* Producer/consumer ring indices */
+	unsigned int rx_buf_sz;				/* Based on MTU+slack. */
+	int rx_copybreak;
+	int multicast_filter_limit;
+	int rx_mode;
+
+	unsigned int cur_tx, dirty_tx;
+	unsigned int tx_full:1;				/* The Tx queue is full. */
+	unsigned int full_duplex:1;			/* Full-duplex operation requested. */
+	unsigned int duplex_lock:1;
+	unsigned int medialock:1;			/* Do not sense media. */
+	unsigned int default_port;			/* Last dev->if_port value. */
+	/* MII transceiver section. */
+	int mii_cnt;						/* MII device addresses. */
+	u16 advertising;					/* NWay media advertisement */
+	unsigned char phys[2];				/* MII device addresses. */
+};
+
+static int read_eeprom(struct net_device *dev, int location);
+static int mdio_read(long ioaddr, int phy_id, int location);
+static void mdio_write(long ioaddr, int phy_id, int location, int value);
+static int hamachi_open(struct net_device *dev);
+static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+#ifdef HAVE_CHANGE_MTU
+static int change_mtu(struct net_device *dev, int new_mtu);
+#endif
+static void hamachi_timer(unsigned long data);
+static void hamachi_tx_timeout(struct net_device *dev);
+static void hamachi_init_ring(struct net_device *dev);
+static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static void hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
+static int hamachi_rx(struct net_device *dev);
+static void hamachi_error(struct net_device *dev, int intr_status);
+static int hamachi_close(struct net_device *dev);
+static struct net_device_stats *hamachi_get_stats(struct net_device *dev);
+static void set_rx_mode(struct net_device *dev);
+
+
+
+/* A list of our installed devices, for removing the driver module. */
+static struct net_device *root_hamachi_dev = NULL;
+
+#ifndef MODULE
+int hamachi_probe(struct net_device *dev)
+{
+	if (pci_drv_register(&hamachi_drv_id, dev) < 0)
+		return -ENODEV;
+	printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
+	return 0;
+}
+#endif
+
+static void *hamachi_probe1(struct pci_dev *pdev, void *init_dev,
+							long ioaddr, int irq, int chip_idx, int card_idx)
+{
+	struct net_device *dev;
+	struct hamachi_private *np;
+	void *priv_mem;
+	int i, option = card_idx < MAX_UNITS ? options[card_idx] : 0;
+
+	dev = init_etherdev(init_dev, 0);
+	if (!dev)
+		return NULL;
+
+	printk(KERN_INFO "%s: %s type %x at 0x%lx, ",
+		   dev->name, pci_id_tbl[chip_idx].name, (int)readl(ioaddr + ChipRev),
+		   ioaddr);
+
+	for (i = 0; i < 6; i++)
+		dev->dev_addr[i] = read_eeprom(dev, 4 + i);
+	/* Alternate:  readb(ioaddr + StationAddr + i); */
+	for (i = 0; i < 5; i++)
+			printk("%2.2x:", dev->dev_addr[i]);
+	printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
+
+	i = readb(ioaddr + PCIClkMeas);
+	printk(KERN_INFO "%s:  %d-bit %d Mhz PCI bus (%d), Virtual Jumpers "
+		   "%2.2x, LPA %4.4x.\n",
+		   dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32,
+		   i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers),
+		   (int)readw(ioaddr + ANLinkPartnerAbility));
+
+	/* Hmmm, do we really need to reset the chip???. */
+	writeb(1, ioaddr + ChipReset);
+
+	/* If the bus size is misidentified, do the following. */
+	if (force32)
+		writeb(force32, ioaddr + VirtualJumpers);
+
+	/* Make certain elements e.g. descriptor lists are aligned. */
+	priv_mem = kmalloc(sizeof(*np) + PRIV_ALIGN, GFP_KERNEL);
+	/* Check for the very unlikely case of no memory. */
+	if (priv_mem == NULL)
+		return NULL;
+
+	dev->base_addr = ioaddr;
+	dev->irq = irq;
+
+	dev->priv = np = (void *)(((long)priv_mem + PRIV_ALIGN) & ~PRIV_ALIGN);
+	memset(np, 0, sizeof(*np));
+	np->priv_addr = priv_mem;
+
+	np->next_module = root_hamachi_dev;
+	root_hamachi_dev = dev;
+
+	np->pci_dev = pdev;
+	np->chip_id = chip_idx;
+	np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
+	np->msg_level = (1 << debug) - 1;
+	np->rx_copybreak = rx_copybreak;
+	np->max_interrupt_work = max_interrupt_work;
+	np->multicast_filter_limit =
+		multicast_filter_limit < 64 ? multicast_filter_limit : 64;
+
+	if (dev->mem_start)
+		option = dev->mem_start;
+
+	/* The lower four bits are the media type. */
+	if (option > 0) {
+		if (option & 0x2220)
+			np->full_duplex = 1;
+		np->default_port = option & 15;
+		if (np->default_port & 0x3330)
+			np->medialock = 1;
+	}
+	if (card_idx < MAX_UNITS  &&  full_duplex[card_idx] > 0)
+		np->full_duplex = 1;
+
+	if (np->full_duplex) {
+		if (np->msg_level & NETIF_MSG_PROBE)
+			printk(KERN_INFO "%s: Set to forced full duplex, autonegotiation"
+				   " disabled.\n", dev->name);
+		np->duplex_lock = 1;
+	}
+
+	/* The Hamachi-specific entries in the device structure. */
+	dev->open = &hamachi_open;
+	dev->hard_start_xmit = &hamachi_start_xmit;
+	dev->stop = &hamachi_close;
+	dev->get_stats = &hamachi_get_stats;
+	dev->set_multicast_list = &set_rx_mode;
+	dev->do_ioctl = &mii_ioctl;
+#ifdef HAVE_CHANGE_MTU
+	dev->change_mtu = change_mtu;
+#endif
+
+	if (np->drv_flags & CanHaveMII) {
+		int phy, phy_idx = 0;
+		for (phy = 0; phy < 32 && phy_idx < 4; phy++) {
+			int mii_status = mdio_read(ioaddr, phy, 1);
+			if (mii_status != 0xffff  &&  mii_status != 0x0000) {
+				np->phys[phy_idx++] = phy;
+				np->advertising = mdio_read(ioaddr, phy, 4);
+				printk(KERN_INFO "%s: MII PHY found at address %d, status "
+					   "0x%4.4x advertising %4.4x.\n",
+					   dev->name, phy, mii_status, np->advertising);
+			}
+		}
+		np->mii_cnt = phy_idx;
+	}
+#ifdef notyet	
+	/* Disable PCI Parity Error (0x02) or PCI 64 Bit (0x01) for miswired
+	   motherboards. */
+	if (readb(ioaddr + VirtualJumpers) != 0x30)
+		writeb(0x33, ioaddr + VirtualJumpers)
+#endif
+	/* Configure gigabit autonegotiation. */
+	writew(0x0400, ioaddr + ANXchngCtrl);	/* Enable legacy links. */
+	writew(0x08e0, ioaddr + ANAdvertise);	/* Set our advertise word. */
+	writew(0x1000, ioaddr + ANCtrl);		/* Enable negotiation */
+
+	return dev;
+}
+
+static int read_eeprom(struct net_device *dev, int location)
+{
+	struct hamachi_private *np = (void *)dev->priv;
+	long ioaddr = dev->base_addr;
+	int bogus_cnt = 1000;
+
+	writew(location, ioaddr + EEAddr);
+	writeb(0x02, ioaddr + EECmdStatus);
+	while ((readb(ioaddr + EECmdStatus) & 0x40)  && --bogus_cnt > 0)
+		;
+	if (np->msg_level & NETIF_MSG_MISC)
+		printk(KERN_DEBUG "   EEPROM status is %2.2x after %d ticks.\n",
+			   (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt);
+	return readb(ioaddr + EEData);
+}
+
+/* MII Managemen Data I/O accesses.
+   These routines assume the MDIO controller is idle, and do not exit until
+   the command is finished. */
+
+static int mdio_read(long ioaddr, int phy_id, int location)
+{
+	int i;
+
+	writew((phy_id<<8) + location, ioaddr + MII_Addr);
+	writew(1, ioaddr + MII_Cmd);
+	for (i = 10000; i >= 0; i--)
+		if ((readw(ioaddr + MII_Status) & 1) == 0)
+			break;
+	return readw(ioaddr + MII_Rd_Data);
+}
+
+static void mdio_write(long ioaddr, int phy_id, int location, int value)
+{
+	int i;
+
+	writew((phy_id<<8) + location, ioaddr + MII_Addr);
+	writew(value, ioaddr + MII_Wr_Data);
+
+	/* Wait for the command to finish. */
+	for (i = 10000; i >= 0; i--)
+		if ((readw(ioaddr + MII_Status) & 1) == 0)
+			break;
+	return;
+}
+
+
+static int hamachi_open(struct net_device *dev)
+{
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+	int i;
+
+	/* Do we need to reset the chip??? */
+
+	MOD_INC_USE_COUNT;
+
+	if (request_irq(dev->irq, &hamachi_interrupt, SA_SHIRQ, dev->name, dev)) {
+		MOD_DEC_USE_COUNT;
+		return -EAGAIN;
+	}
+
+	if (hmp->msg_level & NETIF_MSG_IFUP)
+		printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n",
+			   dev->name, dev->irq);
+
+	hamachi_init_ring(dev);
+
+#if ADDRLEN == 64
+	writel(virt_to_bus(hmp->rx_ring), ioaddr + RxPtr);
+	writel(virt_to_bus(hmp->rx_ring) >> 32, ioaddr + RxPtr + 4);
+	writel(virt_to_bus(hmp->tx_ring), ioaddr + TxPtr);
+	writel(virt_to_bus(hmp->tx_ring) >> 32, ioaddr + TxPtr + 4);
+#else
+	writel(virt_to_bus(hmp->rx_ring), ioaddr + RxPtr);
+	writel(virt_to_bus(hmp->tx_ring), ioaddr + TxPtr);
+#endif
+
+	for (i = 0; i < 6; i++)
+		writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
+
+	/* Initialize other registers: with so many this eventually this will
+	   converted to an offset/value list. */
+	/* Configure the FIFO for 512K external, 16K used for Tx. */
+	writew(0x0028, ioaddr + FIFOcfg);
+
+	if (dev->if_port == 0)
+		dev->if_port = hmp->default_port;
+	hmp->in_interrupt = 0;
+
+	/* Setting the Rx mode will start the Rx process. */
+	/* We are always in full-duplex mode with gigabit! */
+	hmp->full_duplex = 1;
+	writew(0x0001, ioaddr + RxChecksum); /* Enable Rx IP partial checksum. */
+	writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */
+	writew(0x215F, ioaddr + MACCnfg);
+	writew(0x000C, ioaddr + FrameGap0); /* 0060/4060 for non-MII 10baseT */
+	writew(0x1018, ioaddr + FrameGap1);
+	writew(0x2780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */
+	/* Enable automatic generation of flow control frames, period 0xffff. */
+	writel(0x0030FFFF, ioaddr + FlowCtrl);
+	writew(dev->mtu+19, ioaddr + MaxFrameSize); 	/* hmp->rx_buf_sz ??? */
+
+	/* Enable legacy links. */
+	writew(0x0400, ioaddr + ANXchngCtrl);	/* Enable legacy links. */
+	/* Initial Link LED to blinking red. */
+	writeb(0x03, ioaddr + LEDCtrl);
+
+	/* Configure interrupt mitigation.  This has a great effect on
+	   performance, so systems tuning should start here!. */
+	writel(0x00080000, ioaddr + TxIntrCtrl);
+	writel(0x00000020, ioaddr + RxIntrCtrl);
+
+	hmp->rx_mode = 0;			/* Force Rx mode write. */
+	set_rx_mode(dev);
+	netif_start_tx_queue(dev);
+
+	/* Enable interrupts by setting the interrupt mask. */
+	writel(0x80878787, ioaddr + InterruptEnable);
+	writew(0x0000, ioaddr + EventStatus);	/* Clear non-interrupting events */
+
+	/* Configure and start the DMA channels. */
+	/* Burst sizes are in the low three bits: size = 4<<(val&7) */
+#if ADDRLEN == 64
+	writew(0x0055, ioaddr + RxDMACtrl); 		/* 128 dword bursts */
+	writew(0x0055, ioaddr + TxDMACtrl);
+#else
+	writew(0x0015, ioaddr + RxDMACtrl);
+	writew(0x0015, ioaddr + TxDMACtrl);
+#endif
+	writew(1, dev->base_addr + RxCmd);
+
+	if (hmp->msg_level & NETIF_MSG_IFUP)
+		printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
+			   dev->name, (int)readw(ioaddr + RxStatus),
+			   (int)readw(ioaddr + TxStatus));
+
+	/* Set the timer to check for link beat. */
+	init_timer(&hmp->timer);
+	hmp->timer.expires = jiffies + 3*HZ;
+	hmp->timer.data = (unsigned long)dev;
+	hmp->timer.function = &hamachi_timer;				/* timer handler */
+	add_timer(&hmp->timer);
+
+	return 0;
+}
+
+static void hamachi_timer(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *)data;
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+	int next_tick = 10*HZ;
+
+	if (hmp->msg_level & NETIF_MSG_TIMER) {
+		printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA "
+			   "%4.4x.\n", dev->name, (int)readw(ioaddr + ANStatus),
+			   (int)readw(ioaddr + ANLinkPartnerAbility));
+		printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x "
+			   "%4.4x %4.4x %4.4x.\n", dev->name,
+		       (int)readw(ioaddr + 0x0e0),
+			   (int)readw(ioaddr + 0x0e2),
+			   (int)readw(ioaddr + 0x0e4),
+			   (int)readw(ioaddr + 0x0e6),
+			   (int)readw(ioaddr + 0x0e8),
+			   (int)readw(ioaddr + 0x0eA));
+	}
+	/* This has a small false-trigger window. */
+	if (netif_queue_paused(dev) &&
+		(jiffies - dev->trans_start) > TX_TIMEOUT
+		&& hmp->cur_tx - hmp->dirty_tx > 1) {
+		hamachi_tx_timeout(dev);
+	}
+	/* We could do something here... nah. */
+	hmp->timer.expires = jiffies + next_tick;
+	add_timer(&hmp->timer);
+}
+
+static void hamachi_tx_timeout(struct net_device *dev)
+{
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+
+	printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x,"
+		   " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
+
+	if (hmp->msg_level & NETIF_MSG_TX_ERR) {
+		int i;
+		printk(KERN_DEBUG "  Rx ring %p: ", hmp->rx_ring);
+		for (i = 0; i < RX_RING_SIZE; i++)
+			printk(" %8.8x", (unsigned int)hmp->rx_ring[i].status_n_length);
+		printk("\n"KERN_DEBUG"  Tx ring %p: ", hmp->tx_ring);
+		for (i = 0; i < TX_RING_SIZE; i++)
+			printk(" %4.4x", hmp->tx_ring[i].status_n_length);
+		printk("\n");
+	}
+
+	/* Perhaps we should reinitialize the hardware here. */
+	dev->if_port = 0;
+	/* Stop and restart the chip's Tx processes . */
+
+	/* Trigger an immediate transmit demand. */
+	writew(2, dev->base_addr + TxCmd);
+	writew(1, dev->base_addr + TxCmd);
+	writew(1, dev->base_addr + RxCmd);
+
+	dev->trans_start = jiffies;
+	hmp->stats.tx_errors++;
+	return;
+}
+
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void hamachi_init_ring(struct net_device *dev)
+{
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+	int i;
+
+	hmp->tx_full = 0;
+	hmp->cur_rx = hmp->cur_tx = 0;
+	hmp->dirty_rx = hmp->dirty_tx = 0;
+
+	/* Size of each temporary Rx buffer.  Add 8 if you do Rx checksumming! */
+	hmp->rx_buf_sz = dev->mtu + 18 + 8;
+	/* Match other driver's allocation size when possible. */
+	if (hmp->rx_buf_sz < PKT_BUF_SZ)
+		hmp->rx_buf_sz = PKT_BUF_SZ;
+	hmp->rx_head_desc = &hmp->rx_ring[0];
+
+	/* Initialize all Rx descriptors. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		hmp->rx_ring[i].status_n_length = 0;
+		hmp->rx_skbuff[i] = 0;
+	}
+	/* Fill in the Rx buffers.  Handle allocation failure gracefully. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
+		hmp->rx_skbuff[i] = skb;
+		if (skb == NULL)
+			break;
+		skb->dev = dev;			/* Mark as being used by this device. */
+		skb_reserve(skb, 2);	/* 16 byte align the IP header. */
+		hmp->rx_ring[i].addr = virt_to_desc(skb->tail);
+		hmp->rx_ring[i].status_n_length =
+			cpu_to_le32(DescOwn | DescEndPacket | DescIntr | hmp->rx_buf_sz);
+	}
+	hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
+	/* Mark the last entry as wrapping the ring. */
+	hmp->rx_ring[i-1].status_n_length |= cpu_to_le32(DescEndRing);
+
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		hmp->tx_skbuff[i] = 0;
+		hmp->tx_ring[i].status_n_length = 0;
+	}
+	return;
+}
+
+static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+	unsigned entry;
+
+	/* Block a timer-based transmit from overlapping.  This could better be
+	   done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
+	if (netif_pause_tx_queue(dev) != 0) {
+		/* This watchdog code is redundant with the media monitor timer. */
+		if (jiffies - dev->trans_start > TX_TIMEOUT)
+			hamachi_tx_timeout(dev);
+		return 1;
+	}
+
+	/* Note: Ordering is important here, set the field with the
+	   "ownership" bit last, and only then increment cur_tx. */
+
+	/* Calculate the next Tx descriptor entry. */
+	entry = hmp->cur_tx % TX_RING_SIZE;
+
+	hmp->tx_skbuff[entry] = skb;
+
+	hmp->tx_ring[entry].addr = virt_to_desc(skb->data);
+	if (entry >= TX_RING_SIZE-1)		 /* Wrap ring */
+		hmp->tx_ring[entry].status_n_length =
+			cpu_to_le32(DescOwn|DescEndPacket|DescEndRing|DescIntr | skb->len);
+	else
+		hmp->tx_ring[entry].status_n_length =
+			cpu_to_le32(DescOwn|DescEndPacket | skb->len);
+	hmp->cur_tx++;
+
+	/* Architecture-specific: explicitly flush cache lines here. */
+
+	/* Wake the potentially-idle transmit channel. */
+	writew(1, dev->base_addr + TxCmd);
+
+	if (hmp->cur_tx - hmp->dirty_tx >= TX_QUEUE_LEN - 1) {
+		hmp->tx_full = 1;
+		if (hmp->cur_tx - hmp->dirty_tx < TX_QUEUE_LEN - 1) {
+			netif_unpause_tx_queue(dev);
+			hmp->tx_full = 0;
+		} else
+			netif_stop_tx_queue(dev);
+	} else
+		netif_unpause_tx_queue(dev);		/* Typical path */
+	dev->trans_start = jiffies;
+
+	if (hmp->msg_level & NETIF_MSG_TX_QUEUED) {
+		printk(KERN_DEBUG "%s: Hamachi transmit frame #%d length %d queued "
+			   "in slot %d.\n", dev->name, hmp->cur_tx, (int)skb->len, entry);
+	}
+	return 0;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+   after the Tx thread. */
+static void hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *rgs)
+{
+	struct net_device *dev = (struct net_device *)dev_instance;
+	struct hamachi_private *hmp;
+	long ioaddr;
+	int boguscnt = max_interrupt_work;
+
+#ifndef final_version			/* Can never occur. */
+	if (dev == NULL) {
+		printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq);
+		return;
+	}
+#endif
+
+	ioaddr = dev->base_addr;
+	hmp = (struct hamachi_private *)dev->priv;
+	if (test_and_set_bit(0, (void*)&hmp->in_interrupt)) {
+		printk(KERN_ERR "%s: Re-entering the interrupt handler.\n", dev->name);
+		hmp->in_interrupt = 0;	/* Avoid future hang on bug */
+		return;
+	}
+
+	do {
+		u32 intr_status = readl(ioaddr + InterruptClear);
+
+		if (hmp->msg_level & NETIF_MSG_INTR)
+			printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n",
+				   dev->name, intr_status);
+
+		if (intr_status == 0)
+			break;
+
+		if (intr_status & IntrRxDone)
+			hamachi_rx(dev);
+
+		for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) {
+			int entry = hmp->dirty_tx % TX_RING_SIZE;
+			if (!(hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn)))
+				break;
+			if (hmp->msg_level & NETIF_MSG_TX_DONE)
+				printk(KERN_DEBUG "%s: Transmit done, Tx status %8.8x.\n",
+					   dev->name, hmp->tx_ring[entry].status_n_length);
+			/* Free the original skb. */
+			dev_free_skb_irq(hmp->tx_skbuff[entry]);
+			hmp->tx_skbuff[entry] = 0;
+			hmp->stats.tx_packets++;
+		}
+		if (hmp->tx_full
+			&& hmp->cur_tx - hmp->dirty_tx < TX_QUEUE_LEN - 4) {
+			/* The ring is no longer full, clear tbusy. */
+			hmp->tx_full = 0;
+			netif_resume_tx_queue(dev);
+		}
+
+		/* Abnormal error summary/uncommon events handlers. */
+		if (intr_status &
+			(IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr |
+			 LinkChange | NegotiationChange | StatsMax))
+			hamachi_error(dev, intr_status);
+
+		if (--boguscnt < 0) {
+			printk(KERN_WARNING "%s: Too much work at interrupt, "
+				   "status=0x%4.4x.\n",
+				   dev->name, intr_status);
+			break;
+		}
+	} while (1);
+
+	if (hmp->msg_level & NETIF_MSG_INTR)
+		printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
+			   dev->name, (int)readl(ioaddr + IntrStatus));
+	clear_bit(0, (void*)&hmp->in_interrupt);
+	return;
+}
+
+/* This routine is logically part of the interrupt handler, but separated
+   for clarity and better register allocation. */
+static int hamachi_rx(struct net_device *dev)
+{
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+	int entry = hmp->cur_rx % RX_RING_SIZE;
+	int boguscnt = hmp->dirty_rx + RX_RING_SIZE - hmp->cur_rx;
+
+	if (hmp->msg_level & NETIF_MSG_RX_STATUS) {
+		printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n",
+			   entry, hmp->rx_ring[entry].status_n_length);
+	}
+
+	/* If EOP is set on the next entry, it's a new packet. Send it up. */
+	while ( ! (hmp->rx_head_desc->status_n_length & cpu_to_le32(DescOwn))) {
+		struct hamachi_desc *desc = hmp->rx_head_desc;
+		u32 desc_status = le32_to_cpu(desc->status_n_length);
+		u16 data_size = desc_status; 		/* Implicit truncate */
+		u8 *buf_addr = hmp->rx_skbuff[entry]->tail;
+		s32 frame_status =
+			le32_to_cpu(get_unaligned((s32*)&(buf_addr[data_size - 12])));
+
+		if (hmp->msg_level & NETIF_MSG_RX_STATUS)
+			printk(KERN_DEBUG "  hamachi_rx() status was %8.8x.\n",
+				   frame_status);
+		if (--boguscnt < 0)
+			break;
+		if ( ! (desc_status & DescEndPacket)) {
+			printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
+				   "multiple buffers, entry %#x length %d status %4.4x!\n",
+				   dev->name, hmp->cur_rx, data_size, desc_status);
+			printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n",
+				   dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]);
+			printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status"
+				   " %x last status %x.\n", dev->name,
+				   hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length,
+				   hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length);
+			hmp->stats.rx_length_errors++;
+		} /* else  Omit for prototype errata??? */
+		if (frame_status & 0x00380000) {
+			/* There was a error. */
+			if (hmp->msg_level & NETIF_MSG_RX_ERR)
+				printk(KERN_DEBUG "  hamachi_rx() Rx error was %8.8x.\n",
+					   frame_status);
+			hmp->stats.rx_errors++;
+			if (frame_status & 0x00600000) hmp->stats.rx_length_errors++;
+			if (frame_status & 0x00080000) hmp->stats.rx_frame_errors++;
+			if (frame_status & 0x00100000) hmp->stats.rx_crc_errors++;
+			if (frame_status < 0) hmp->stats.rx_dropped++;
+		} else {
+			struct sk_buff *skb;
+			u16 pkt_len = (frame_status & 0x07ff) - 4;	/* Omit CRC */
+
+#if ! defined(final_version)  &&  0
+			if (hmp->msg_level & NETIF_MSG_RX_STATUS)
+				printk(KERN_DEBUG "  hamachi_rx() normal Rx pkt length %d"
+					   " of %d, bogus_cnt %d.\n",
+					   pkt_len, data_size, boguscnt);
+			if (hmp->msg_level & NETIF_MSG_PKTDATA)
+				printk(KERN_DEBUG"%s:  rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
+					   dev->name,
+					   *(s32*)&(buf_addr[data_size - 20]),
+					   *(s32*)&(buf_addr[data_size - 16]),
+					   *(s32*)&(buf_addr[data_size - 12]),
+					   *(s32*)&(buf_addr[data_size - 8]),
+					   *(s32*)&(buf_addr[data_size - 4]));
+#endif
+			/* Check if the packet is long enough to accept without copying
+			   to a minimally-sized skbuff. */
+			if (pkt_len < rx_copybreak
+				&& (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
+				skb->dev = dev;
+				skb_reserve(skb, 2);	/* 16 byte align the IP header */
+				eth_copy_and_sum(skb, hmp->rx_skbuff[entry]->tail, pkt_len, 0);
+				skb_put(skb, pkt_len);
+			} else {
+				char *temp = skb_put(skb = hmp->rx_skbuff[entry], pkt_len);
+				hmp->rx_skbuff[entry] = NULL;
+#if ! defined(final_version)
+				if (bus_to_virt(desc->addr) != temp)
+					printk(KERN_ERR "%s: Internal fault: The skbuff addresses "
+						   "do not match in hamachi_rx: %p vs. %p / %p.\n",
+						   dev->name, bus_to_virt(desc->addr),
+						   skb->head, temp);
+#endif
+			}
+			skb->protocol = eth_type_trans(skb, dev);
+			/* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */
+			netif_rx(skb);
+			dev->last_rx = jiffies;
+			hmp->stats.rx_packets++;
+		}
+		entry = (++hmp->cur_rx) % RX_RING_SIZE;
+		hmp->rx_head_desc = &hmp->rx_ring[entry];
+	}
+
+	/* Refill the Rx ring buffers. */
+	for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) {
+		struct sk_buff *skb;
+		entry = hmp->dirty_rx % RX_RING_SIZE;
+		if (hmp->rx_skbuff[entry] == NULL) {
+			skb = dev_alloc_skb(hmp->rx_buf_sz);
+			hmp->rx_skbuff[entry] = skb;
+			if (skb == NULL)
+				break;			/* Better luck next round. */
+			skb->dev = dev;			/* Mark as being used by this device. */
+			skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
+			hmp->rx_ring[entry].addr = virt_to_desc(skb->tail);
+		}
+		if (entry >= RX_RING_SIZE-1)		 /* Wrap ring */
+			hmp->rx_ring[entry].status_n_length =
+				cpu_to_le32(DescOwn|DescEndPacket|DescEndRing|DescIntr | hmp->rx_buf_sz);
+		else
+			hmp->rx_ring[entry].status_n_length =
+				cpu_to_le32(DescOwn|DescEndPacket|DescIntr | hmp->rx_buf_sz);
+	}
+
+	/* Restart Rx engine if stopped. */
+	writew(1, dev->base_addr + RxCmd);
+	return 0;
+}
+
+/* This is more properly named "uncommon interrupt events", as it covers more
+   than just errors. */
+static void hamachi_error(struct net_device *dev, int intr_status)
+{
+	long ioaddr = dev->base_addr;
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+
+	if (intr_status & (LinkChange|NegotiationChange)) {
+		if (hmp->msg_level & NETIF_MSG_LINK)
+			printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl"
+				   " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
+				   dev->name, (int)readw(ioaddr + 0x0E0),
+				   (int)readw(ioaddr + 0x0E2),
+				   (int)readw(ioaddr + ANLinkPartnerAbility),
+				   (int)readl(ioaddr + IntrStatus));
+		if (readw(ioaddr + ANStatus) & 0x20) {
+			writeb(0x01, ioaddr + LEDCtrl);
+			netif_link_up(dev);
+		} else {
+			writeb(0x03, ioaddr + LEDCtrl);
+			netif_link_down(dev);
+		}
+	}
+	if (intr_status & StatsMax) {
+		hamachi_get_stats(dev);
+		/* Read the overflow bits to clear. */
+		readl(ioaddr + 0x36C);
+		readl(ioaddr + 0x3F0);
+	}
+	if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange))
+		&& (hmp->msg_level & NETIF_MSG_DRV))
+		printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
+			   dev->name, intr_status);
+	/* Hmmmmm, it's not clear how to recover from PCI faults. */
+	if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
+		hmp->stats.tx_fifo_errors++;
+	if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
+		hmp->stats.rx_fifo_errors++;
+}
+
+static int hamachi_close(struct net_device *dev)
+{
+	long ioaddr = dev->base_addr;
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+	int i;
+
+	netif_stop_tx_queue(dev);
+
+	if (hmp->msg_level & NETIF_MSG_IFDOWN) {
+		printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x "
+			   "Rx %4.4x Int %2.2x.\n",
+			   dev->name, (int)readw(ioaddr + TxStatus),
+			   (int)readw(ioaddr + RxStatus), (int)readl(ioaddr + IntrStatus));
+		printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d,  Rx %d / %d.\n",
+			   dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx,
+			   hmp->dirty_rx);
+	}
+
+	/* Disable interrupts by clearing the interrupt mask. */
+	writel(0x0000, ioaddr + InterruptEnable);
+
+	/* Stop the chip's Tx and Rx processes. */
+	writel(2, ioaddr + RxCmd);
+	writew(2, ioaddr + TxCmd);
+
+	del_timer(&hmp->timer);
+
+#ifdef __i386__
+	if (hmp->msg_level & NETIF_MSG_IFDOWN) {
+		printk("\n"KERN_DEBUG"  Tx ring at %8.8x:\n",
+			   (int)virt_to_bus(hmp->tx_ring));
+		for (i = 0; i < TX_RING_SIZE; i++)
+			printk(" %c #%d desc. %8.8x %8.8x.\n",
+				   readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ',
+				   i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr);
+		printk("\n"KERN_DEBUG "  Rx ring %8.8x:\n",
+			   (int)virt_to_bus(hmp->rx_ring));
+		for (i = 0; i < RX_RING_SIZE; i++) {
+			printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x\n",
+				   readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ',
+				   i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr);
+			if (*(u8*)hmp->rx_ring[i].addr != 0x69) {
+				int j;
+				for (j = 0; j < 0x50; j++)
+					printk(" %4.4x", ((u16*)hmp->rx_ring[i].addr)[j]);
+				printk("\n");
+			}
+		}
+	}
+#endif /* __i386__ debugging only */
+
+	free_irq(dev->irq, dev);
+
+	/* Free all the skbuffs in the Rx queue. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		hmp->rx_ring[i].status_n_length = 0;
+		hmp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
+		if (hmp->rx_skbuff[i]) {
+#if LINUX_VERSION_CODE < 0x20100
+			hmp->rx_skbuff[i]->free = 1;
+#endif
+			dev_free_skb(hmp->rx_skbuff[i]);
+		}
+		hmp->rx_skbuff[i] = 0;
+	}
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		if (hmp->tx_skbuff[i])
+			dev_free_skb(hmp->tx_skbuff[i]);
+		hmp->tx_skbuff[i] = 0;
+	}
+
+	writeb(0x00, ioaddr + LEDCtrl);
+
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+static struct net_device_stats *hamachi_get_stats(struct net_device *dev)
+{
+	long ioaddr = dev->base_addr;
+	struct hamachi_private *hmp = (struct hamachi_private *)dev->priv;
+
+	/* We should lock this segment of code for SMP eventually, although
+	   the vulnerability window is very small and statistics are
+	   non-critical. */
+#if LINUX_VERSION_CODE >= 0x20119
+	hmp->stats.rx_bytes += readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */
+	hmp->stats.tx_bytes += readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */
+#endif
+	hmp->stats.multicast		+= readl(ioaddr + 0x320); /* Multicast Rx */
+
+	hmp->stats.rx_length_errors	+= readl(ioaddr + 0x368); /* Over+Undersized */
+	hmp->stats.rx_over_errors	+= readl(ioaddr + 0x35C); /* Jabber */
+	hmp->stats.rx_crc_errors	+= readl(ioaddr + 0x360);
+	hmp->stats.rx_frame_errors	+= readl(ioaddr + 0x364); /* Symbol Errs */
+	hmp->stats.rx_missed_errors	+= readl(ioaddr + 0x36C); /* Dropped */
+
+	return &hmp->stats;
+}
+
+static void set_rx_mode(struct net_device *dev)
+{
+	struct hamachi_private *np = (void *)dev->priv;
+	long ioaddr = dev->base_addr;
+	int new_rx_mode;
+
+	if (dev->flags & IFF_PROMISC) {			/* Set promiscuous. */
+		/* Unconditionally log net taps. */
+		printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
+		new_rx_mode = 0x000F;
+	} else if (dev->mc_count > np->multicast_filter_limit ||
+			   (dev->flags & IFF_ALLMULTI)) {
+		/* Too many to match, or accept all multicasts. */
+		new_rx_mode = 0x000B;
+	} else if (dev->mc_count > 0) { /* Must use the CAM filter. */
+		struct dev_mc_list *mclist;
+		int i;
+		for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
+			 i++, mclist = mclist->next) {
+			writel(*(u32*)(mclist->dmi_addr), ioaddr + 0x100 + i*8);
+			writel(0x20000 | (*(u16*)&mclist->dmi_addr[4]),
+				   ioaddr + 0x104 + i*8);
+		}
+		/* Clear remaining entries. */
+		for (; i < 64; i++)
+			writel(0, ioaddr + 0x104 + i*8);
+		new_rx_mode = 0x0003;
+	} else {					/* Normal, unicast/broadcast-only mode. */
+		new_rx_mode = 0x0001;
+	}
+	if (np->rx_mode != new_rx_mode) {
+		np->rx_mode = new_rx_mode;
+		writew(new_rx_mode, ioaddr + AddrMode);
+	}
+}
+
+static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct hamachi_private *np = (void *)dev->priv;
+	long ioaddr = dev->base_addr;
+	u16 *data = (u16 *)&rq->ifr_data;
+	u32 *data32 = (void *)&rq->ifr_data;
+
+	switch(cmd) {
+	case 0x8947: case 0x89F0:
+		/* SIOCGMIIPHY: Get the address of the PHY in use. */
+		data[0] = np->phys[0] & 0x1f;
+		/* Fall Through */
+	case 0x8948: case 0x89F1:
+		/* SIOCGMIIREG: Read the specified MII register. */
+		data[3] = mdio_read(ioaddr, data[0] & 0x1f, data[1] & 0x1f);
+		return 0;
+	case 0x8949: case 0x89F2:
+		/* SIOCSMIIREG: Write the specified MII register */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		/* We are always full duplex.  Skip recording the advertised value. */
+		mdio_write(ioaddr, data[0] & 0x1f, data[1] & 0x1f, data[2]);
+		return 0;
+	case SIOCGPARAMS:
+		data32[0] = np->msg_level;
+		data32[1] = np->multicast_filter_limit;
+		data32[2] = np->max_interrupt_work;
+		data32[3] = np->rx_copybreak;
+		return 0;
+	case SIOCSPARAMS: {
+		/* Set rx,tx intr params, from Eric Kasten. */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		np->msg_level = data32[0];
+		np->max_interrupt_work = data32[2];
+		writel(data32[1], dev->base_addr + TxIntrCtrl);
+		writel(data32[3], dev->base_addr + RxIntrCtrl);
+		printk(KERN_INFO "%s: Set interrupt mitigate paramters tx %08x, "
+			   "rx %08x.\n", dev->name,
+			   (int) readl(dev->base_addr + TxIntrCtrl),
+			   (int) readl(dev->base_addr + RxIntrCtrl));
+		return 0;
+	}
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+#ifdef HAVE_CHANGE_MTU
+static int change_mtu(struct net_device *dev, int new_mtu)
+{
+	if ((new_mtu < 68) || (new_mtu > 1536))
+		return -EINVAL;
+	if (netif_running(dev))
+		return -EBUSY;
+	printk(KERN_NOTICE "%s: Changing MTU to %d.\n", dev->name, new_mtu);
+	dev->mtu = new_mtu;
+	return 0;
+}
+#endif
+
+
+#ifdef MODULE
+int init_module(void)
+{
+	if (debug >= NETIF_MSG_DRV)	/* Emit version even if no cards detected. */
+		printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
+	return pci_drv_register(&hamachi_drv_id, NULL);
+}
+
+void cleanup_module(void)
+{
+	struct net_device *next_dev;
+
+	pci_drv_unregister(&hamachi_drv_id);
+
+	/* No need to check MOD_IN_USE, as sys_delete_module() checks. */
+	while (root_hamachi_dev) {
+		struct hamachi_private *hmp = (void *)(root_hamachi_dev->priv);
+		unregister_netdev(root_hamachi_dev);
+		iounmap((char *)root_hamachi_dev->base_addr);
+		next_dev = hmp->next_module;
+		if (hmp->priv_addr)
+			kfree(hmp->priv_addr);
+		kfree(root_hamachi_dev);
+		root_hamachi_dev = next_dev;
+	}
+}
+
+#endif  /* MODULE */
+
+/*
+ * Local variables:
+ *  compile-command: "make KERNVER=`uname -r` hamachi.o"
+ *  compile-cmd: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c hamachi.c"
+ *  simple-compile-command: "gcc -DMODULE -O6 -c hamachi.c"
+ *  c-indent-level: 4
+ *  c-basic-offset: 4
+ *  tab-width: 4
+ * End:
+ */