Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1308 insertions, 0 deletions

diff --git a/drivers/net/lance.c b/drivers/net/lance.c
new file mode 100644
index 000000000000..dec557fb6a99
--- /dev/null
+++ b/drivers/net/lance.c
@@ -0,0 +1,1308 @@
+/* lance.c: An AMD LANCE/PCnet ethernet driver for Linux. */
+/*
+	Written/copyright 1993-1998 by Donald Becker.
+
+	Copyright 1993 United States Government as represented by the
+	Director, National Security Agency.
+	This software may be used and distributed according to the terms
+	of the GNU General Public License, incorporated herein by reference.
+
+	This driver is for the Allied Telesis AT1500 and HP J2405A, and should work
+	with most other LANCE-based bus-master (NE2100/NE2500) ethercards.
+
+	The author may be reached as becker@scyld.com, or C/O
+	Scyld Computing Corporation
+	410 Severn Ave., Suite 210
+	Annapolis MD 21403
+
+	Andrey V. Savochkin:
+	- alignment problem with 1.3.* kernel and some minor changes.
+	Thomas Bogendoerfer (tsbogend@bigbug.franken.de):
+	- added support for Linux/Alpha, but removed most of it, because
+        it worked only for the PCI chip. 
+      - added hook for the 32bit lance driver
+      - added PCnetPCI II (79C970A) to chip table
+	Paul Gortmaker (gpg109@rsphy1.anu.edu.au):
+	- hopefully fix above so Linux/Alpha can use ISA cards too.
+    8/20/96 Fixed 7990 autoIRQ failure and reversed unneeded alignment -djb
+    v1.12 10/27/97 Module support -djb
+    v1.14  2/3/98 Module support modified, made PCI support optional -djb
+    v1.15 5/27/99 Fixed bug in the cleanup_module(). dev->priv was freed
+                  before unregister_netdev() which caused NULL pointer
+                  reference later in the chain (in rtnetlink_fill_ifinfo())
+                  -- Mika Kuoppala <miku@iki.fi>
+    
+    Forward ported v1.14 to 2.1.129, merged the PCI and misc changes from
+    the 2.1 version of the old driver - Alan Cox
+
+    Get rid of check_region, check kmalloc return in lance_probe1
+    Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001
+
+	Reworked detection, added support for Racal InterLan EtherBlaster cards
+	Vesselin Kostadinov <vesok at yahoo dot com > - 22/4/2004
+*/
+
+static const char version[] = "lance.c:v1.15ac 1999/11/13 dplatt@3do.com, becker@cesdis.gsfc.nasa.gov\n";
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+
+static unsigned int lance_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0};
+static int lance_probe1(struct net_device *dev, int ioaddr, int irq, int options);
+static int __init do_lance_probe(struct net_device *dev);
+
+
+static struct card {
+	char id_offset14;
+	char id_offset15;
+} cards[] = {
+	{	//"normal"
+		.id_offset14 = 0x57,
+		.id_offset15 = 0x57,
+	},
+	{	//NI6510EB
+		.id_offset14 = 0x52,
+		.id_offset15 = 0x44,
+	},
+	{	//Racal InterLan EtherBlaster
+		.id_offset14 = 0x52,
+		.id_offset15 = 0x49,
+	},
+};
+#define NUM_CARDS 3
+
+#ifdef LANCE_DEBUG
+static int lance_debug = LANCE_DEBUG;
+#else
+static int lance_debug = 1;
+#endif
+
+/*
+				Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the AMD 79C960, the "PCnet-ISA
+single-chip ethernet controller for ISA".  This chip is used in a wide
+variety of boards from vendors such as Allied Telesis, HP, Kingston,
+and Boca.  This driver is also intended to work with older AMD 7990
+designs, such as the NE1500 and NE2100, and newer 79C961.  For convenience,
+I use the name LANCE to refer to all of the AMD chips, even though it properly
+refers only to the original 7990.
+
+II. Board-specific settings
+
+The driver is designed to work the boards that use the faster
+bus-master mode, rather than in shared memory mode.	 (Only older designs
+have on-board buffer memory needed to support the slower shared memory mode.)
+
+Most ISA boards have jumpered settings for the I/O base, IRQ line, and DMA
+channel.  This driver probes the likely base addresses:
+{0x300, 0x320, 0x340, 0x360}.
+After the board is found it generates a DMA-timeout interrupt and uses
+autoIRQ to find the IRQ line.  The DMA channel can be set with the low bits
+of the otherwise-unused dev->mem_start value (aka PARAM1).  If unset it is
+probed for by enabling each free DMA channel in turn and checking if
+initialization succeeds.
+
+The HP-J2405A board is an exception: with this board it is easy to read the
+EEPROM-set values for the base, IRQ, and DMA.  (Of course you must already
+_know_ the base address -- that field is for writing the EEPROM.)
+
+III. Driver operation
+
+IIIa. Ring buffers
+The LANCE uses ring buffers of Tx and Rx descriptors.  Each entry describes
+the base and length of the data buffer, along with status bits.	 The length
+of these buffers is set by LANCE_LOG_{RX,TX}_BUFFERS, which is log_2() of
+the buffer length (rather than being directly the buffer length) for
+implementation ease.  The current values are 2 (Tx) and 4 (Rx), which leads to
+ring sizes of 4 (Tx) and 16 (Rx).  Increasing the number of ring entries
+needlessly uses extra space and reduces the chance that an upper layer will
+be able to reorder queued Tx packets based on priority.	 Decreasing the number
+of entries makes it more difficult to achieve back-to-back packet transmission
+and increases the chance that Rx ring will overflow.  (Consider the worst case
+of receiving back-to-back minimum-sized packets.)
+
+The LANCE has the capability to "chain" both Rx and Tx buffers, but this driver
+statically allocates full-sized (slightly oversized -- PKT_BUF_SZ) buffers to
+avoid the administrative overhead. For the Rx side this avoids dynamically
+allocating full-sized buffers "just in case", at the expense of a
+memory-to-memory data copy for each packet received.  For most systems this
+is a good tradeoff: the Rx buffer will always be in low memory, the copy
+is inexpensive, and it primes the cache for later packet processing.  For Tx
+the buffers are only used when needed as low-memory bounce buffers.
+
+IIIB. 16M memory limitations.
+For the ISA bus master mode all structures used directly by the LANCE,
+the initialization block, Rx and Tx rings, and data buffers, must be
+accessible from the ISA bus, i.e. in the lower 16M of real memory.
+This is a problem for current Linux kernels on >16M machines. The network
+devices are initialized after memory initialization, and the kernel doles out
+memory from the top of memory downward.	 The current solution is to have a
+special network initialization routine that's called before memory
+initialization; this will eventually be generalized for all network devices.
+As mentioned before, low-memory "bounce-buffers" are used when needed.
+
+IIIC. Synchronization
+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 'lp->tx_full' flag.
+
+The interrupt handler has exclusive control over the Rx ring and records stats
+from the Tx ring. (The Tx-done interrupt can't be selectively turned off, so
+we can't avoid the interrupt overhead by having the Tx routine reap the Tx
+stats.)	 After reaping the stats, it marks the queue entry as empty by setting
+the 'base' to zero. Iff the 'lp->tx_full' flag is set, it clears both the
+tx_full and tbusy flags.
+
+*/
+
+/* Set the number of Tx and Rx buffers, using Log_2(# buffers).
+   Reasonable default values are 16 Tx buffers, and 16 Rx buffers.
+   That translates to 4 and 4 (16 == 2^^4).
+   This is a compile-time option for efficiency.
+   */
+#ifndef LANCE_LOG_TX_BUFFERS
+#define LANCE_LOG_TX_BUFFERS 4
+#define LANCE_LOG_RX_BUFFERS 4
+#endif
+
+#define TX_RING_SIZE			(1 << (LANCE_LOG_TX_BUFFERS))
+#define TX_RING_MOD_MASK		(TX_RING_SIZE - 1)
+#define TX_RING_LEN_BITS		((LANCE_LOG_TX_BUFFERS) << 29)
+
+#define RX_RING_SIZE			(1 << (LANCE_LOG_RX_BUFFERS))
+#define RX_RING_MOD_MASK		(RX_RING_SIZE - 1)
+#define RX_RING_LEN_BITS		((LANCE_LOG_RX_BUFFERS) << 29)
+
+#define PKT_BUF_SZ		1544
+
+/* Offsets from base I/O address. */
+#define LANCE_DATA 0x10
+#define LANCE_ADDR 0x12
+#define LANCE_RESET 0x14
+#define LANCE_BUS_IF 0x16
+#define LANCE_TOTAL_SIZE 0x18
+
+#define TX_TIMEOUT	20
+
+/* The LANCE Rx and Tx ring descriptors. */
+struct lance_rx_head {
+	s32 base;
+	s16 buf_length;			/* This length is 2s complement (negative)! */
+	s16 msg_length;			/* This length is "normal". */
+};
+
+struct lance_tx_head {
+	s32 base;
+	s16 length;				/* Length is 2s complement (negative)! */
+	s16 misc;
+};
+
+/* The LANCE initialization block, described in databook. */
+struct lance_init_block {
+	u16 mode;		/* Pre-set mode (reg. 15) */
+	u8  phys_addr[6]; /* Physical ethernet address */
+	u32 filter[2];			/* Multicast filter (unused). */
+	/* Receive and transmit ring base, along with extra bits. */
+	u32  rx_ring;			/* Tx and Rx ring base pointers */
+	u32  tx_ring;
+};
+
+struct lance_private {
+	/* The Tx and Rx ring entries must be aligned on 8-byte boundaries. */
+	struct lance_rx_head rx_ring[RX_RING_SIZE];
+	struct lance_tx_head tx_ring[TX_RING_SIZE];
+	struct lance_init_block	init_block;
+	const char *name;
+	/* The saved address of a sent-in-place packet/buffer, for skfree(). */
+	struct sk_buff* tx_skbuff[TX_RING_SIZE];
+	/* The addresses of receive-in-place skbuffs. */
+	struct sk_buff* rx_skbuff[RX_RING_SIZE];
+	unsigned long rx_buffs;		/* Address of Rx and Tx buffers. */
+	/* Tx low-memory "bounce buffer" address. */
+	char (*tx_bounce_buffs)[PKT_BUF_SZ];
+	int cur_rx, cur_tx;			/* The next free ring entry */
+	int dirty_rx, dirty_tx;		/* The ring entries to be free()ed. */
+	int dma;
+	struct net_device_stats stats;
+	unsigned char chip_version;	/* See lance_chip_type. */
+	spinlock_t devlock;
+};
+
+#define LANCE_MUST_PAD          0x00000001
+#define LANCE_ENABLE_AUTOSELECT 0x00000002
+#define LANCE_MUST_REINIT_RING  0x00000004
+#define LANCE_MUST_UNRESET      0x00000008
+#define LANCE_HAS_MISSED_FRAME  0x00000010
+
+/* A mapping from the chip ID number to the part number and features.
+   These are from the datasheets -- in real life the '970 version
+   reportedly has the same ID as the '965. */
+static struct lance_chip_type {
+	int id_number;
+	const char *name;
+	int flags;
+} chip_table[] = {
+	{0x0000, "LANCE 7990",				/* Ancient lance chip.  */
+		LANCE_MUST_PAD + LANCE_MUST_UNRESET},
+	{0x0003, "PCnet/ISA 79C960",		/* 79C960 PCnet/ISA.  */
+		LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
+			LANCE_HAS_MISSED_FRAME},
+	{0x2260, "PCnet/ISA+ 79C961",		/* 79C961 PCnet/ISA+, Plug-n-Play.  */
+		LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
+			LANCE_HAS_MISSED_FRAME},
+	{0x2420, "PCnet/PCI 79C970",		/* 79C970 or 79C974 PCnet-SCSI, PCI. */
+		LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
+			LANCE_HAS_MISSED_FRAME},
+	/* Bug: the PCnet/PCI actually uses the PCnet/VLB ID number, so just call
+		it the PCnet32. */
+	{0x2430, "PCnet32",					/* 79C965 PCnet for VL bus. */
+		LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
+			LANCE_HAS_MISSED_FRAME},
+        {0x2621, "PCnet/PCI-II 79C970A",        /* 79C970A PCInetPCI II. */
+                LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
+                        LANCE_HAS_MISSED_FRAME},
+	{0x0, 	 "PCnet (unknown)",
+		LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
+			LANCE_HAS_MISSED_FRAME},
+};
+
+enum {OLD_LANCE = 0, PCNET_ISA=1, PCNET_ISAP=2, PCNET_PCI=3, PCNET_VLB=4, PCNET_PCI_II=5, LANCE_UNKNOWN=6};
+
+
+/* Non-zero if lance_probe1() needs to allocate low-memory bounce buffers.
+   Assume yes until we know the memory size. */
+static unsigned char lance_need_isa_bounce_buffers = 1;
+
+static int lance_open(struct net_device *dev);
+static void lance_init_ring(struct net_device *dev, int mode);
+static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static int lance_rx(struct net_device *dev);
+static irqreturn_t lance_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static int lance_close(struct net_device *dev);
+static struct net_device_stats *lance_get_stats(struct net_device *dev);
+static void set_multicast_list(struct net_device *dev);
+static void lance_tx_timeout (struct net_device *dev);
+
+
+
+static void cleanup_card(struct net_device *dev)
+{
+	struct lance_private *lp = dev->priv;
+	if (dev->dma != 4)
+		free_dma(dev->dma);
+	release_region(dev->base_addr, LANCE_TOTAL_SIZE);
+	kfree(lp->tx_bounce_buffs);
+	kfree((void*)lp->rx_buffs);
+	kfree(lp);
+}
+
+#ifdef MODULE
+#define MAX_CARDS		8	/* Max number of interfaces (cards) per module */
+
+static struct net_device *dev_lance[MAX_CARDS];
+static int io[MAX_CARDS];
+static int dma[MAX_CARDS];
+static int irq[MAX_CARDS];
+
+module_param_array(io, int, NULL, 0);
+module_param_array(dma, int, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+module_param(lance_debug, int, 0);
+MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required");
+MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)");
+MODULE_PARM_DESC(irq, "LANCE/PCnet IRQ number (ignored for some devices)");
+MODULE_PARM_DESC(lance_debug, "LANCE/PCnet debug level (0-7)");
+
+int init_module(void)
+{
+	struct net_device *dev;
+	int this_dev, found = 0;
+
+	for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
+		if (io[this_dev] == 0)  {
+			if (this_dev != 0) /* only complain once */
+				break;
+			printk(KERN_NOTICE "lance.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n");
+			return -EPERM;
+		}
+		dev = alloc_etherdev(0);
+		if (!dev)
+			break;
+		dev->irq = irq[this_dev];
+		dev->base_addr = io[this_dev];
+		dev->dma = dma[this_dev];
+		if (do_lance_probe(dev) == 0) {
+			if (register_netdev(dev) == 0) {
+				dev_lance[found++] = dev;
+				continue;
+			}
+			cleanup_card(dev);
+		}
+		free_netdev(dev);
+		break;
+	}
+	if (found != 0)
+		return 0;
+	return -ENXIO;
+}
+
+void cleanup_module(void)
+{
+	int this_dev;
+
+	for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
+		struct net_device *dev = dev_lance[this_dev];
+		if (dev) {
+			unregister_netdev(dev);	
+			cleanup_card(dev);
+			free_netdev(dev);
+		}
+	}
+}
+#endif /* MODULE */
+MODULE_LICENSE("GPL");
+
+
+/* Starting in v2.1.*, the LANCE/PCnet probe is now similar to the other
+   board probes now that kmalloc() can allocate ISA DMA-able regions.
+   This also allows the LANCE driver to be used as a module.
+   */
+static int __init do_lance_probe(struct net_device *dev)
+{
+	int *port, result;
+
+	if (high_memory <= phys_to_virt(16*1024*1024))
+		lance_need_isa_bounce_buffers = 0;
+
+	for (port = lance_portlist; *port; port++) {
+		int ioaddr = *port;
+		struct resource *r = request_region(ioaddr, LANCE_TOTAL_SIZE,
+							"lance-probe");
+
+		if (r) {
+			/* Detect the card with minimal I/O reads */
+			char offset14 = inb(ioaddr + 14);
+			int card;
+			for (card = 0; card < NUM_CARDS; ++card)
+				if (cards[card].id_offset14 == offset14)
+					break;
+			if (card < NUM_CARDS) {/*yes, the first byte matches*/
+				char offset15 = inb(ioaddr + 15);
+				for (card = 0; card < NUM_CARDS; ++card)
+					if ((cards[card].id_offset14 == offset14) &&
+						(cards[card].id_offset15 == offset15))
+						break;
+			}
+			if (card < NUM_CARDS) { /*Signature OK*/
+				result = lance_probe1(dev, ioaddr, 0, 0);
+				if (!result) {
+					struct lance_private *lp = dev->priv;
+					int ver = lp->chip_version;
+
+					r->name = chip_table[ver].name;
+					return 0;
+				}
+			}
+			release_region(ioaddr, LANCE_TOTAL_SIZE);
+		}
+	}
+	return -ENODEV;
+}
+
+#ifndef MODULE
+struct net_device * __init lance_probe(int unit)
+{
+	struct net_device *dev = alloc_etherdev(0);
+	int err;
+
+	if (!dev)
+		return ERR_PTR(-ENODEV);
+
+	sprintf(dev->name, "eth%d", unit);
+	netdev_boot_setup_check(dev);
+
+	err = do_lance_probe(dev);
+	if (err)
+		goto out;
+	err = register_netdev(dev);
+	if (err)
+		goto out1;
+	return dev;
+out1:
+	cleanup_card(dev);
+out:
+	free_netdev(dev);
+	return ERR_PTR(err);
+}
+#endif
+
+static int __init lance_probe1(struct net_device *dev, int ioaddr, int irq, int options)
+{
+	struct lance_private *lp;
+	long dma_channels;			/* Mark spuriously-busy DMA channels */
+	int i, reset_val, lance_version;
+	const char *chipname;
+	/* Flags for specific chips or boards. */
+	unsigned char hpJ2405A = 0;		/* HP ISA adaptor */
+	int hp_builtin = 0;			/* HP on-board ethernet. */
+	static int did_version;			/* Already printed version info. */
+	unsigned long flags;
+	int err = -ENOMEM;
+
+	/* First we look for special cases.
+	   Check for HP's on-board ethernet by looking for 'HP' in the BIOS.
+	   There are two HP versions, check the BIOS for the configuration port.
+	   This method provided by L. Julliard, Laurent_Julliard@grenoble.hp.com.
+	   */
+	if (isa_readw(0x000f0102) == 0x5048)  {
+		static const short ioaddr_table[] = { 0x300, 0x320, 0x340, 0x360};
+		int hp_port = (isa_readl(0x000f00f1) & 1)  ? 0x499 : 0x99;
+		/* We can have boards other than the built-in!  Verify this is on-board. */
+		if ((inb(hp_port) & 0xc0) == 0x80
+			&& ioaddr_table[inb(hp_port) & 3] == ioaddr)
+			hp_builtin = hp_port;
+	}
+	/* We also recognize the HP Vectra on-board here, but check below. */
+	hpJ2405A = (inb(ioaddr) == 0x08 && inb(ioaddr+1) == 0x00
+				&& inb(ioaddr+2) == 0x09);
+
+	/* Reset the LANCE.	 */
+	reset_val = inw(ioaddr+LANCE_RESET); /* Reset the LANCE */
+
+	/* The Un-Reset needed is only needed for the real NE2100, and will
+	   confuse the HP board. */
+	if (!hpJ2405A)
+		outw(reset_val, ioaddr+LANCE_RESET);
+
+	outw(0x0000, ioaddr+LANCE_ADDR); /* Switch to window 0 */
+	if (inw(ioaddr+LANCE_DATA) != 0x0004)
+		return -ENODEV;
+
+	/* Get the version of the chip. */
+	outw(88, ioaddr+LANCE_ADDR);
+	if (inw(ioaddr+LANCE_ADDR) != 88) {
+		lance_version = 0;
+	} else {			/* Good, it's a newer chip. */
+		int chip_version = inw(ioaddr+LANCE_DATA);
+		outw(89, ioaddr+LANCE_ADDR);
+		chip_version |= inw(ioaddr+LANCE_DATA) << 16;
+		if (lance_debug > 2)
+			printk("  LANCE chip version is %#x.\n", chip_version);
+		if ((chip_version & 0xfff) != 0x003)
+			return -ENODEV;
+		chip_version = (chip_version >> 12) & 0xffff;
+		for (lance_version = 1; chip_table[lance_version].id_number; lance_version++) {
+			if (chip_table[lance_version].id_number == chip_version)
+				break;
+		}
+	}
+
+	/* We can't allocate dev->priv from alloc_etherdev() because it must
+	   a ISA DMA-able region. */
+	SET_MODULE_OWNER(dev);
+	chipname = chip_table[lance_version].name;
+	printk("%s: %s at %#3x,", dev->name, chipname, ioaddr);
+
+	/* There is a 16 byte station address PROM at the base address.
+	   The first six bytes are the station address. */
+	for (i = 0; i < 6; i++)
+		printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
+
+	dev->base_addr = ioaddr;
+	/* Make certain the data structures used by the LANCE are aligned and DMAble. */
+		
+	lp = kmalloc(sizeof(*lp), GFP_DMA | GFP_KERNEL);
+	if(lp==NULL)
+		return -ENODEV;
+	if (lance_debug > 6) printk(" (#0x%05lx)", (unsigned long)lp);
+	memset(lp, 0, sizeof(*lp));
+	dev->priv = lp;
+	lp->name = chipname;
+	lp->rx_buffs = (unsigned long)kmalloc(PKT_BUF_SZ*RX_RING_SIZE,
+						  GFP_DMA | GFP_KERNEL);
+	if (!lp->rx_buffs)
+		goto out_lp;
+	if (lance_need_isa_bounce_buffers) {
+		lp->tx_bounce_buffs = kmalloc(PKT_BUF_SZ*TX_RING_SIZE,
+						  GFP_DMA | GFP_KERNEL);
+		if (!lp->tx_bounce_buffs)
+			goto out_rx;
+	} else
+		lp->tx_bounce_buffs = NULL;
+
+	lp->chip_version = lance_version;
+	spin_lock_init(&lp->devlock);
+
+	lp->init_block.mode = 0x0003;		/* Disable Rx and Tx. */
+	for (i = 0; i < 6; i++)
+		lp->init_block.phys_addr[i] = dev->dev_addr[i];
+	lp->init_block.filter[0] = 0x00000000;
+	lp->init_block.filter[1] = 0x00000000;
+	lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
+	lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
+
+	outw(0x0001, ioaddr+LANCE_ADDR);
+	inw(ioaddr+LANCE_ADDR);
+	outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
+	outw(0x0002, ioaddr+LANCE_ADDR);
+	inw(ioaddr+LANCE_ADDR);
+	outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
+	outw(0x0000, ioaddr+LANCE_ADDR);
+	inw(ioaddr+LANCE_ADDR);
+
+	if (irq) {					/* Set iff PCI card. */
+		dev->dma = 4;			/* Native bus-master, no DMA channel needed. */
+		dev->irq = irq;
+	} else if (hp_builtin) {
+		static const char dma_tbl[4] = {3, 5, 6, 0};
+		static const char irq_tbl[4] = {3, 4, 5, 9};
+		unsigned char port_val = inb(hp_builtin);
+		dev->dma = dma_tbl[(port_val >> 4) & 3];
+		dev->irq = irq_tbl[(port_val >> 2) & 3];
+		printk(" HP Vectra IRQ %d DMA %d.\n", dev->irq, dev->dma);
+	} else if (hpJ2405A) {
+		static const char dma_tbl[4] = {3, 5, 6, 7};
+		static const char irq_tbl[8] = {3, 4, 5, 9, 10, 11, 12, 15};
+		short reset_val = inw(ioaddr+LANCE_RESET);
+		dev->dma = dma_tbl[(reset_val >> 2) & 3];
+		dev->irq = irq_tbl[(reset_val >> 4) & 7];
+		printk(" HP J2405A IRQ %d DMA %d.\n", dev->irq, dev->dma);
+	} else if (lance_version == PCNET_ISAP) {		/* The plug-n-play version. */
+		short bus_info;
+		outw(8, ioaddr+LANCE_ADDR);
+		bus_info = inw(ioaddr+LANCE_BUS_IF);
+		dev->dma = bus_info & 0x07;
+		dev->irq = (bus_info >> 4) & 0x0F;
+	} else {
+		/* The DMA channel may be passed in PARAM1. */
+		if (dev->mem_start & 0x07)
+			dev->dma = dev->mem_start & 0x07;
+	}
+
+	if (dev->dma == 0) {
+		/* Read the DMA channel status register, so that we can avoid
+		   stuck DMA channels in the DMA detection below. */
+		dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
+			(inb(DMA2_STAT_REG) & 0xf0);
+	}
+	err = -ENODEV;
+	if (dev->irq >= 2)
+		printk(" assigned IRQ %d", dev->irq);
+	else if (lance_version != 0)  {	/* 7990 boards need DMA detection first. */
+		unsigned long irq_mask;
+
+		/* To auto-IRQ we enable the initialization-done and DMA error
+		   interrupts. For ISA boards we get a DMA error, but VLB and PCI
+		   boards will work. */
+		irq_mask = probe_irq_on();
+
+		/* Trigger an initialization just for the interrupt. */
+		outw(0x0041, ioaddr+LANCE_DATA);
+
+		mdelay(20);
+		dev->irq = probe_irq_off(irq_mask);
+		if (dev->irq)
+			printk(", probed IRQ %d", dev->irq);
+		else {
+			printk(", failed to detect IRQ line.\n");
+			goto out_tx;
+		}
+
+		/* Check for the initialization done bit, 0x0100, which means
+		   that we don't need a DMA channel. */
+		if (inw(ioaddr+LANCE_DATA) & 0x0100)
+			dev->dma = 4;
+	}
+
+	if (dev->dma == 4) {
+		printk(", no DMA needed.\n");
+	} else if (dev->dma) {
+		if (request_dma(dev->dma, chipname)) {
+			printk("DMA %d allocation failed.\n", dev->dma);
+			goto out_tx;
+		} else
+			printk(", assigned DMA %d.\n", dev->dma);
+	} else {			/* OK, we have to auto-DMA. */
+		for (i = 0; i < 4; i++) {
+			static const char dmas[] = { 5, 6, 7, 3 };
+			int dma = dmas[i];
+			int boguscnt;
+
+			/* Don't enable a permanently busy DMA channel, or the machine
+			   will hang. */
+			if (test_bit(dma, &dma_channels))
+				continue;
+			outw(0x7f04, ioaddr+LANCE_DATA); /* Clear the memory error bits. */
+			if (request_dma(dma, chipname))
+				continue;
+				
+			flags=claim_dma_lock();
+			set_dma_mode(dma, DMA_MODE_CASCADE);
+			enable_dma(dma);
+			release_dma_lock(flags);
+
+			/* Trigger an initialization. */
+			outw(0x0001, ioaddr+LANCE_DATA);
+			for (boguscnt = 100; boguscnt > 0; --boguscnt)
+				if (inw(ioaddr+LANCE_DATA) & 0x0900)
+					break;
+			if (inw(ioaddr+LANCE_DATA) & 0x0100) {
+				dev->dma = dma;
+				printk(", DMA %d.\n", dev->dma);
+				break;
+			} else {
+				flags=claim_dma_lock();
+				disable_dma(dma);
+				release_dma_lock(flags);
+				free_dma(dma);
+			}
+		}
+		if (i == 4) {			/* Failure: bail. */
+			printk("DMA detection failed.\n");
+			goto out_tx;
+		}
+	}
+
+	if (lance_version == 0 && dev->irq == 0) {
+		/* We may auto-IRQ now that we have a DMA channel. */
+		/* Trigger an initialization just for the interrupt. */
+		unsigned long irq_mask;
+
+		irq_mask = probe_irq_on();
+		outw(0x0041, ioaddr+LANCE_DATA);
+
+		mdelay(40);
+		dev->irq = probe_irq_off(irq_mask);
+		if (dev->irq == 0) {
+			printk("  Failed to detect the 7990 IRQ line.\n");
+			goto out_dma;
+		}
+		printk("  Auto-IRQ detected IRQ%d.\n", dev->irq);
+	}
+
+	if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
+		/* Turn on auto-select of media (10baseT or BNC) so that the user
+		   can watch the LEDs even if the board isn't opened. */
+		outw(0x0002, ioaddr+LANCE_ADDR);
+		/* Don't touch 10base2 power bit. */
+		outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
+	}
+
+	if (lance_debug > 0  &&  did_version++ == 0)
+		printk(version);
+
+	/* The LANCE-specific entries in the device structure. */
+	dev->open = lance_open;
+	dev->hard_start_xmit = lance_start_xmit;
+	dev->stop = lance_close;
+	dev->get_stats = lance_get_stats;
+	dev->set_multicast_list = set_multicast_list;
+	dev->tx_timeout = lance_tx_timeout;
+	dev->watchdog_timeo = TX_TIMEOUT;
+
+	return 0;
+out_dma:
+	if (dev->dma != 4)
+		free_dma(dev->dma);
+out_tx:
+	kfree(lp->tx_bounce_buffs);
+out_rx:
+	kfree((void*)lp->rx_buffs);
+out_lp:
+	kfree(lp);
+	return err;
+}
+
+
+static int
+lance_open(struct net_device *dev)
+{
+	struct lance_private *lp = dev->priv;
+	int ioaddr = dev->base_addr;
+	int i;
+
+	if (dev->irq == 0 ||
+		request_irq(dev->irq, &lance_interrupt, 0, lp->name, dev)) {
+		return -EAGAIN;
+	}
+
+	/* We used to allocate DMA here, but that was silly.
+	   DMA lines can't be shared!  We now permanently allocate them. */
+
+	/* Reset the LANCE */
+	inw(ioaddr+LANCE_RESET);
+
+	/* The DMA controller is used as a no-operation slave, "cascade mode". */
+	if (dev->dma != 4) {
+		unsigned long flags=claim_dma_lock();
+		enable_dma(dev->dma);
+		set_dma_mode(dev->dma, DMA_MODE_CASCADE);
+		release_dma_lock(flags);
+	}
+
+	/* Un-Reset the LANCE, needed only for the NE2100. */
+	if (chip_table[lp->chip_version].flags & LANCE_MUST_UNRESET)
+		outw(0, ioaddr+LANCE_RESET);
+
+	if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
+		/* This is 79C960-specific: Turn on auto-select of media (AUI, BNC). */
+		outw(0x0002, ioaddr+LANCE_ADDR);
+		/* Only touch autoselect bit. */
+		outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
+ 	}
+
+	if (lance_debug > 1)
+		printk("%s: lance_open() irq %d dma %d tx/rx rings %#x/%#x init %#x.\n",
+			   dev->name, dev->irq, dev->dma,
+		           (u32) isa_virt_to_bus(lp->tx_ring),
+		           (u32) isa_virt_to_bus(lp->rx_ring),
+			   (u32) isa_virt_to_bus(&lp->init_block));
+
+	lance_init_ring(dev, GFP_KERNEL);
+	/* Re-initialize the LANCE, and start it when done. */
+	outw(0x0001, ioaddr+LANCE_ADDR);
+	outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
+	outw(0x0002, ioaddr+LANCE_ADDR);
+	outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
+
+	outw(0x0004, ioaddr+LANCE_ADDR);
+	outw(0x0915, ioaddr+LANCE_DATA);
+
+	outw(0x0000, ioaddr+LANCE_ADDR);
+	outw(0x0001, ioaddr+LANCE_DATA);
+
+	netif_start_queue (dev);
+
+	i = 0;
+	while (i++ < 100)
+		if (inw(ioaddr+LANCE_DATA) & 0x0100)
+			break;
+	/* 
+	 * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
+	 * reports that doing so triggers a bug in the '974.
+	 */
+ 	outw(0x0042, ioaddr+LANCE_DATA);
+
+	if (lance_debug > 2)
+		printk("%s: LANCE open after %d ticks, init block %#x csr0 %4.4x.\n",
+			   dev->name, i, (u32) isa_virt_to_bus(&lp->init_block), inw(ioaddr+LANCE_DATA));
+
+	return 0;					/* Always succeed */
+}
+
+/* The LANCE has been halted for one reason or another (busmaster memory
+   arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
+   etc.).  Modern LANCE variants always reload their ring-buffer
+   configuration when restarted, so we must reinitialize our ring
+   context before restarting.  As part of this reinitialization,
+   find all packets still on the Tx ring and pretend that they had been
+   sent (in effect, drop the packets on the floor) - the higher-level
+   protocols will time out and retransmit.  It'd be better to shuffle
+   these skbs to a temp list and then actually re-Tx them after
+   restarting the chip, but I'm too lazy to do so right now.  dplatt@3do.com
+*/
+
+static void 
+lance_purge_ring(struct net_device *dev)
+{
+	struct lance_private *lp = dev->priv;
+	int i;
+
+	/* Free all the skbuffs in the Rx and Tx queues. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct sk_buff *skb = lp->rx_skbuff[i];
+		lp->rx_skbuff[i] = NULL;
+		lp->rx_ring[i].base = 0;		/* Not owned by LANCE chip. */
+		if (skb)
+			dev_kfree_skb_any(skb);
+	}
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		if (lp->tx_skbuff[i]) {
+			dev_kfree_skb_any(lp->tx_skbuff[i]);
+			lp->tx_skbuff[i] = NULL;
+		}
+	}
+}
+
+
+/* Initialize the LANCE Rx and Tx rings. */
+static void
+lance_init_ring(struct net_device *dev, int gfp)
+{
+	struct lance_private *lp = dev->priv;
+	int i;
+
+	lp->cur_rx = lp->cur_tx = 0;
+	lp->dirty_rx = lp->dirty_tx = 0;
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct sk_buff *skb;
+		void *rx_buff;
+
+		skb = alloc_skb(PKT_BUF_SZ, GFP_DMA | gfp);
+		lp->rx_skbuff[i] = skb;
+		if (skb) {
+			skb->dev = dev;
+			rx_buff = skb->tail;
+		} else
+			rx_buff = kmalloc(PKT_BUF_SZ, GFP_DMA | gfp);
+		if (rx_buff == NULL)
+			lp->rx_ring[i].base = 0;
+		else
+			lp->rx_ring[i].base = (u32)isa_virt_to_bus(rx_buff) | 0x80000000;
+		lp->rx_ring[i].buf_length = -PKT_BUF_SZ;
+	}
+	/* The Tx buffer address is filled in as needed, but we do need to clear
+	   the upper ownership bit. */
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		lp->tx_skbuff[i] = NULL;
+		lp->tx_ring[i].base = 0;
+	}
+
+	lp->init_block.mode = 0x0000;
+	for (i = 0; i < 6; i++)
+		lp->init_block.phys_addr[i] = dev->dev_addr[i];
+	lp->init_block.filter[0] = 0x00000000;
+	lp->init_block.filter[1] = 0x00000000;
+	lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
+	lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
+}
+
+static void
+lance_restart(struct net_device *dev, unsigned int csr0_bits, int must_reinit)
+{
+	struct lance_private *lp = dev->priv;
+
+	if (must_reinit ||
+		(chip_table[lp->chip_version].flags & LANCE_MUST_REINIT_RING)) {
+		lance_purge_ring(dev);
+		lance_init_ring(dev, GFP_ATOMIC);
+	}
+	outw(0x0000,    dev->base_addr + LANCE_ADDR);
+	outw(csr0_bits, dev->base_addr + LANCE_DATA);
+}
+
+
+static void lance_tx_timeout (struct net_device *dev)
+{
+	struct lance_private *lp = (struct lance_private *) dev->priv;
+	int ioaddr = dev->base_addr;
+
+	outw (0, ioaddr + LANCE_ADDR);
+	printk ("%s: transmit timed out, status %4.4x, resetting.\n",
+		dev->name, inw (ioaddr + LANCE_DATA));
+	outw (0x0004, ioaddr + LANCE_DATA);
+	lp->stats.tx_errors++;
+#ifndef final_version
+	if (lance_debug > 3) {
+		int i;
+		printk (" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
+		  lp->dirty_tx, lp->cur_tx, netif_queue_stopped(dev) ? " (full)" : "",
+			lp->cur_rx);
+		for (i = 0; i < RX_RING_SIZE; i++)
+			printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
+			 lp->rx_ring[i].base, -lp->rx_ring[i].buf_length,
+				lp->rx_ring[i].msg_length);
+		for (i = 0; i < TX_RING_SIZE; i++)
+			printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
+			     lp->tx_ring[i].base, -lp->tx_ring[i].length,
+				lp->tx_ring[i].misc);
+		printk ("\n");
+	}
+#endif
+	lance_restart (dev, 0x0043, 1);
+
+	dev->trans_start = jiffies;
+	netif_wake_queue (dev);
+}
+
+
+static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct lance_private *lp = dev->priv;
+	int ioaddr = dev->base_addr;
+	int entry;
+	unsigned long flags;
+
+	spin_lock_irqsave(&lp->devlock, flags);
+
+	if (lance_debug > 3) {
+		outw(0x0000, ioaddr+LANCE_ADDR);
+		printk("%s: lance_start_xmit() called, csr0 %4.4x.\n", dev->name,
+			   inw(ioaddr+LANCE_DATA));
+		outw(0x0000, ioaddr+LANCE_DATA);
+	}
+
+	/* Fill in a Tx ring entry */
+
+	/* Mask to ring buffer boundary. */
+	entry = lp->cur_tx & TX_RING_MOD_MASK;
+
+	/* Caution: the write order is important here, set the base address
+	   with the "ownership" bits last. */
+
+	/* The old LANCE chips doesn't automatically pad buffers to min. size. */
+	if (chip_table[lp->chip_version].flags & LANCE_MUST_PAD) {
+		if (skb->len < ETH_ZLEN) {
+			skb = skb_padto(skb, ETH_ZLEN);
+			if (skb == NULL)
+				goto out;
+			lp->tx_ring[entry].length = -ETH_ZLEN;
+		}
+		else 
+			lp->tx_ring[entry].length = -skb->len;
+	} else
+		lp->tx_ring[entry].length = -skb->len;
+
+	lp->tx_ring[entry].misc = 0x0000;
+
+	lp->stats.tx_bytes += skb->len;
+
+	/* If any part of this buffer is >16M we must copy it to a low-memory
+	   buffer. */
+	if ((u32)isa_virt_to_bus(skb->data) + skb->len > 0x01000000) {
+		if (lance_debug > 5)
+			printk("%s: bouncing a high-memory packet (%#x).\n",
+				   dev->name, (u32)isa_virt_to_bus(skb->data));
+		memcpy(&lp->tx_bounce_buffs[entry], skb->data, skb->len);
+		lp->tx_ring[entry].base =
+			((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000;
+		dev_kfree_skb(skb);
+	} else {
+		lp->tx_skbuff[entry] = skb;
+		lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000;
+	}
+	lp->cur_tx++;
+
+	/* Trigger an immediate send poll. */
+	outw(0x0000, ioaddr+LANCE_ADDR);
+	outw(0x0048, ioaddr+LANCE_DATA);
+
+	dev->trans_start = jiffies;
+
+	if ((lp->cur_tx - lp->dirty_tx) >= TX_RING_SIZE)
+		netif_stop_queue(dev);
+
+out:
+	spin_unlock_irqrestore(&lp->devlock, flags);
+	return 0;
+}
+
+/* The LANCE interrupt handler. */
+static irqreturn_t
+lance_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+{
+	struct net_device *dev = dev_id;
+	struct lance_private *lp;
+	int csr0, ioaddr, boguscnt=10;
+	int must_restart;
+
+	if (dev == NULL) {
+		printk ("lance_interrupt(): irq %d for unknown device.\n", irq);
+		return IRQ_NONE;
+	}
+
+	ioaddr = dev->base_addr;
+	lp = dev->priv;
+	
+	spin_lock (&lp->devlock);
+
+	outw(0x00, dev->base_addr + LANCE_ADDR);
+	while ((csr0 = inw(dev->base_addr + LANCE_DATA)) & 0x8600
+		   && --boguscnt >= 0) {
+		/* Acknowledge all of the current interrupt sources ASAP. */
+		outw(csr0 & ~0x004f, dev->base_addr + LANCE_DATA);
+
+		must_restart = 0;
+
+		if (lance_debug > 5)
+			printk("%s: interrupt  csr0=%#2.2x new csr=%#2.2x.\n",
+				   dev->name, csr0, inw(dev->base_addr + LANCE_DATA));
+
+		if (csr0 & 0x0400)			/* Rx interrupt */
+			lance_rx(dev);
+
+		if (csr0 & 0x0200) {		/* Tx-done interrupt */
+			int dirty_tx = lp->dirty_tx;
+
+			while (dirty_tx < lp->cur_tx) {
+				int entry = dirty_tx & TX_RING_MOD_MASK;
+				int status = lp->tx_ring[entry].base;
+			
+				if (status < 0)
+					break;			/* It still hasn't been Txed */
+
+				lp->tx_ring[entry].base = 0;
+
+				if (status & 0x40000000) {
+					/* There was an major error, log it. */
+					int err_status = lp->tx_ring[entry].misc;
+					lp->stats.tx_errors++;
+					if (err_status & 0x0400) lp->stats.tx_aborted_errors++;
+					if (err_status & 0x0800) lp->stats.tx_carrier_errors++;
+					if (err_status & 0x1000) lp->stats.tx_window_errors++;
+					if (err_status & 0x4000) {
+						/* Ackk!  On FIFO errors the Tx unit is turned off! */
+						lp->stats.tx_fifo_errors++;
+						/* Remove this verbosity later! */
+						printk("%s: Tx FIFO error! Status %4.4x.\n",
+							   dev->name, csr0);
+						/* Restart the chip. */
+						must_restart = 1;
+					}
+				} else {
+					if (status & 0x18000000)
+						lp->stats.collisions++;
+					lp->stats.tx_packets++;
+				}
+
+				/* We must free the original skb if it's not a data-only copy
+				   in the bounce buffer. */
+				if (lp->tx_skbuff[entry]) {
+					dev_kfree_skb_irq(lp->tx_skbuff[entry]);
+					lp->tx_skbuff[entry] = NULL;
+				}
+				dirty_tx++;
+			}
+
+#ifndef final_version
+			if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
+				printk("out-of-sync dirty pointer, %d vs. %d, full=%s.\n",
+					   dirty_tx, lp->cur_tx,
+					   netif_queue_stopped(dev) ? "yes" : "no");
+				dirty_tx += TX_RING_SIZE;
+			}
+#endif
+
+			/* if the ring is no longer full, accept more packets */
+			if (netif_queue_stopped(dev) &&
+			    dirty_tx > lp->cur_tx - TX_RING_SIZE + 2)
+				netif_wake_queue (dev);
+
+			lp->dirty_tx = dirty_tx;
+		}
+
+		/* Log misc errors. */
+		if (csr0 & 0x4000) lp->stats.tx_errors++; /* Tx babble. */
+		if (csr0 & 0x1000) lp->stats.rx_errors++; /* Missed a Rx frame. */
+		if (csr0 & 0x0800) {
+			printk("%s: Bus master arbitration failure, status %4.4x.\n",
+				   dev->name, csr0);
+			/* Restart the chip. */
+			must_restart = 1;
+		}
+
+		if (must_restart) {
+			/* stop the chip to clear the error condition, then restart */
+			outw(0x0000, dev->base_addr + LANCE_ADDR);
+			outw(0x0004, dev->base_addr + LANCE_DATA);
+			lance_restart(dev, 0x0002, 0);
+		}
+	}
+
+	/* Clear any other interrupt, and set interrupt enable. */
+	outw(0x0000, dev->base_addr + LANCE_ADDR);
+	outw(0x7940, dev->base_addr + LANCE_DATA);
+
+	if (lance_debug > 4)
+		printk("%s: exiting interrupt, csr%d=%#4.4x.\n",
+			   dev->name, inw(ioaddr + LANCE_ADDR),
+			   inw(dev->base_addr + LANCE_DATA));
+
+	spin_unlock (&lp->devlock);
+	return IRQ_HANDLED;
+}
+
+static int
+lance_rx(struct net_device *dev)
+{
+	struct lance_private *lp = dev->priv;
+	int entry = lp->cur_rx & RX_RING_MOD_MASK;
+	int i;
+		
+	/* If we own the next entry, it's a new packet. Send it up. */
+	while (lp->rx_ring[entry].base >= 0) {
+		int status = lp->rx_ring[entry].base >> 24;
+
+		if (status != 0x03) {			/* There was an error. */
+			/* There is a tricky error noted by John Murphy,
+			   <murf@perftech.com> to Russ Nelson: Even with full-sized
+			   buffers it's possible for a jabber packet to use two
+			   buffers, with only the last correctly noting the error. */
+			if (status & 0x01)	/* Only count a general error at the */
+				lp->stats.rx_errors++; /* end of a packet.*/
+			if (status & 0x20) lp->stats.rx_frame_errors++;
+			if (status & 0x10) lp->stats.rx_over_errors++;
+			if (status & 0x08) lp->stats.rx_crc_errors++;
+			if (status & 0x04) lp->stats.rx_fifo_errors++;
+			lp->rx_ring[entry].base &= 0x03ffffff;
+		}
+		else 
+		{
+			/* Malloc up new buffer, compatible with net3. */
+			short pkt_len = (lp->rx_ring[entry].msg_length & 0xfff)-4;
+			struct sk_buff *skb;
+			
+			if(pkt_len<60)
+			{
+				printk("%s: Runt packet!\n",dev->name);
+				lp->stats.rx_errors++;
+			}
+			else
+			{
+				skb = dev_alloc_skb(pkt_len+2);
+				if (skb == NULL) 
+				{
+					printk("%s: Memory squeeze, deferring packet.\n", dev->name);
+					for (i=0; i < RX_RING_SIZE; i++)
+						if (lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].base < 0)
+							break;
+
+					if (i > RX_RING_SIZE -2) 
+					{
+						lp->stats.rx_dropped++;
+						lp->rx_ring[entry].base |= 0x80000000;
+						lp->cur_rx++;
+					}
+					break;
+				}
+				skb->dev = dev;
+				skb_reserve(skb,2);	/* 16 byte align */
+				skb_put(skb,pkt_len);	/* Make room */
+				eth_copy_and_sum(skb,
+					(unsigned char *)isa_bus_to_virt((lp->rx_ring[entry].base & 0x00ffffff)),
+					pkt_len,0);
+				skb->protocol=eth_type_trans(skb,dev);
+				netif_rx(skb);
+				dev->last_rx = jiffies;
+				lp->stats.rx_packets++;
+				lp->stats.rx_bytes+=pkt_len;
+			}
+		}
+		/* The docs say that the buffer length isn't touched, but Andrew Boyd
+		   of QNX reports that some revs of the 79C965 clear it. */
+		lp->rx_ring[entry].buf_length = -PKT_BUF_SZ;
+		lp->rx_ring[entry].base |= 0x80000000;
+		entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
+	}
+
+	/* We should check that at least two ring entries are free.	 If not,
+	   we should free one and mark stats->rx_dropped++. */
+
+	return 0;
+}
+
+static int
+lance_close(struct net_device *dev)
+{
+	int ioaddr = dev->base_addr;
+	struct lance_private *lp = dev->priv;
+
+	netif_stop_queue (dev);
+
+	if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
+		outw(112, ioaddr+LANCE_ADDR);
+		lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
+	}
+	outw(0, ioaddr+LANCE_ADDR);
+
+	if (lance_debug > 1)
+		printk("%s: Shutting down ethercard, status was %2.2x.\n",
+			   dev->name, inw(ioaddr+LANCE_DATA));
+
+	/* We stop the LANCE here -- it occasionally polls
+	   memory if we don't. */
+	outw(0x0004, ioaddr+LANCE_DATA);
+
+	if (dev->dma != 4)
+	{
+		unsigned long flags=claim_dma_lock();
+		disable_dma(dev->dma);
+		release_dma_lock(flags);
+	}
+	free_irq(dev->irq, dev);
+
+	lance_purge_ring(dev);
+
+	return 0;
+}
+
+static struct net_device_stats *lance_get_stats(struct net_device *dev)
+{
+	struct lance_private *lp = dev->priv;
+
+	if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
+		short ioaddr = dev->base_addr;
+		short saved_addr;
+		unsigned long flags;
+
+		spin_lock_irqsave(&lp->devlock, flags);
+		saved_addr = inw(ioaddr+LANCE_ADDR);
+		outw(112, ioaddr+LANCE_ADDR);
+		lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
+		outw(saved_addr, ioaddr+LANCE_ADDR);
+		spin_unlock_irqrestore(&lp->devlock, flags);
+	}
+
+	return &lp->stats;
+}
+
+/* Set or clear the multicast filter for this adaptor.
+ */
+
+static void set_multicast_list(struct net_device *dev)
+{
+	short ioaddr = dev->base_addr;
+
+	outw(0, ioaddr+LANCE_ADDR);
+	outw(0x0004, ioaddr+LANCE_DATA); /* Temporarily stop the lance.	 */
+
+	if (dev->flags&IFF_PROMISC) {
+		/* Log any net taps. */
+		printk("%s: Promiscuous mode enabled.\n", dev->name);
+		outw(15, ioaddr+LANCE_ADDR);
+		outw(0x8000, ioaddr+LANCE_DATA); /* Set promiscuous mode */
+	} else {
+		short multicast_table[4];
+		int i;
+		int num_addrs=dev->mc_count;
+		if(dev->flags&IFF_ALLMULTI)
+			num_addrs=1;
+		/* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */
+		memset(multicast_table, (num_addrs == 0) ? 0 : -1, sizeof(multicast_table));
+		for (i = 0; i < 4; i++) {
+			outw(8 + i, ioaddr+LANCE_ADDR);
+			outw(multicast_table[i], ioaddr+LANCE_DATA);
+		}
+		outw(15, ioaddr+LANCE_ADDR);
+		outw(0x0000, ioaddr+LANCE_DATA); /* Unset promiscuous mode */
+	}
+
+	lance_restart(dev, 0x0142, 0); /*  Resume normal operation */
+
+}
+