Linux-2.6.12-rc2v2.6.12-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, 3271 insertions, 0 deletions

diff --git a/drivers/net/acenic.c b/drivers/net/acenic.c
new file mode 100644
index 00000000000..6eea3a8accb
--- /dev/null
+++ b/drivers/net/acenic.c
@@ -0,0 +1,3271 @@
+/*
+ * acenic.c: Linux driver for the Alteon AceNIC Gigabit Ethernet card
+ *           and other Tigon based cards.
+ *
+ * Copyright 1998-2002 by Jes Sorensen, <jes@trained-monkey.org>.
+ *
+ * Thanks to Alteon and 3Com for providing hardware and documentation
+ * enabling me to write this driver.
+ *
+ * A mailing list for discussing the use of this driver has been
+ * setup, please subscribe to the lists if you have any questions
+ * about the driver. Send mail to linux-acenic-help@sunsite.auc.dk to
+ * see how to subscribe.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Additional credits:
+ *   Pete Wyckoff <wyckoff@ca.sandia.gov>: Initial Linux/Alpha and trace
+ *       dump support. The trace dump support has not been
+ *       integrated yet however.
+ *   Troy Benjegerdes: Big Endian (PPC) patches.
+ *   Nate Stahl: Better out of memory handling and stats support.
+ *   Aman Singla: Nasty race between interrupt handler and tx code dealing
+ *                with 'testing the tx_ret_csm and setting tx_full'
+ *   David S. Miller <davem@redhat.com>: conversion to new PCI dma mapping
+ *                                       infrastructure and Sparc support
+ *   Pierrick Pinasseau (CERN): For lending me an Ultra 5 to test the
+ *                              driver under Linux/Sparc64
+ *   Matt Domsch <Matt_Domsch@dell.com>: Detect Alteon 1000baseT cards
+ *                                       ETHTOOL_GDRVINFO support
+ *   Chip Salzenberg <chip@valinux.com>: Fix race condition between tx
+ *                                       handler and close() cleanup.
+ *   Ken Aaker <kdaaker@rchland.vnet.ibm.com>: Correct check for whether
+ *                                       memory mapped IO is enabled to
+ *                                       make the driver work on RS/6000.
+ *   Takayoshi Kouchi <kouchi@hpc.bs1.fc.nec.co.jp>: Identifying problem
+ *                                       where the driver would disable
+ *                                       bus master mode if it had to disable
+ *                                       write and invalidate.
+ *   Stephen Hack <stephen_hack@hp.com>: Fixed ace_set_mac_addr for little
+ *                                       endian systems.
+ *   Val Henson <vhenson@esscom.com>:    Reset Jumbo skb producer and
+ *                                       rx producer index when
+ *                                       flushing the Jumbo ring.
+ *   Hans Grobler <grobh@sun.ac.za>:     Memory leak fixes in the
+ *                                       driver init path.
+ *   Grant Grundler <grundler@cup.hp.com>: PCI write posting fixes.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/sockios.h>
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+#include <linux/if_vlan.h>
+#endif
+
+#ifdef SIOCETHTOOL
+#include <linux/ethtool.h>
+#endif
+
+#include <net/sock.h>
+#include <net/ip.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+
+
+#define DRV_NAME "acenic"
+
+#undef INDEX_DEBUG
+
+#ifdef CONFIG_ACENIC_OMIT_TIGON_I
+#define ACE_IS_TIGON_I(ap)	0
+#define ACE_TX_RING_ENTRIES(ap)	MAX_TX_RING_ENTRIES
+#else
+#define ACE_IS_TIGON_I(ap)	(ap->version == 1)
+#define ACE_TX_RING_ENTRIES(ap)	ap->tx_ring_entries
+#endif
+
+#ifndef PCI_VENDOR_ID_ALTEON
+#define PCI_VENDOR_ID_ALTEON		0x12ae	
+#endif
+#ifndef PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE
+#define PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE  0x0001
+#define PCI_DEVICE_ID_ALTEON_ACENIC_COPPER 0x0002
+#endif
+#ifndef PCI_DEVICE_ID_3COM_3C985
+#define PCI_DEVICE_ID_3COM_3C985	0x0001
+#endif
+#ifndef PCI_VENDOR_ID_NETGEAR
+#define PCI_VENDOR_ID_NETGEAR		0x1385
+#define PCI_DEVICE_ID_NETGEAR_GA620	0x620a
+#endif
+#ifndef PCI_DEVICE_ID_NETGEAR_GA620T
+#define PCI_DEVICE_ID_NETGEAR_GA620T	0x630a
+#endif
+
+
+/*
+ * Farallon used the DEC vendor ID by mistake and they seem not
+ * to care - stinky!
+ */
+#ifndef PCI_DEVICE_ID_FARALLON_PN9000SX
+#define PCI_DEVICE_ID_FARALLON_PN9000SX	0x1a
+#endif
+#ifndef PCI_DEVICE_ID_FARALLON_PN9100T
+#define PCI_DEVICE_ID_FARALLON_PN9100T  0xfa
+#endif
+#ifndef PCI_VENDOR_ID_SGI
+#define PCI_VENDOR_ID_SGI		0x10a9
+#endif
+#ifndef PCI_DEVICE_ID_SGI_ACENIC
+#define PCI_DEVICE_ID_SGI_ACENIC	0x0009
+#endif
+
+static struct pci_device_id acenic_pci_tbl[] = {
+	{ PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	{ PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_COPPER,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3C985,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	{ PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	{ PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620T,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	/*
+	 * Farallon used the DEC vendor ID on their cards incorrectly,
+	 * then later Alteon's ID.
+	 */
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_FARALLON_PN9000SX,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	{ PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_FARALLON_PN9100T,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	{ PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_ACENIC,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, acenic_pci_tbl);
+
+#ifndef SET_NETDEV_DEV
+#define SET_NETDEV_DEV(net, pdev)	do{} while(0)
+#endif
+
+#if LINUX_VERSION_CODE >= 0x2051c
+#define ace_sync_irq(irq)	synchronize_irq(irq)
+#else
+#define ace_sync_irq(irq)	synchronize_irq()
+#endif
+
+#ifndef offset_in_page
+#define offset_in_page(ptr)	((unsigned long)(ptr) & ~PAGE_MASK)
+#endif
+
+#define ACE_MAX_MOD_PARMS	8
+#define BOARD_IDX_STATIC	0
+#define BOARD_IDX_OVERFLOW	-1
+
+#if (defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)) && \
+	defined(NETIF_F_HW_VLAN_RX)
+#define ACENIC_DO_VLAN		1
+#define ACE_RCB_VLAN_FLAG	RCB_FLG_VLAN_ASSIST
+#else
+#define ACENIC_DO_VLAN		0
+#define ACE_RCB_VLAN_FLAG	0
+#endif
+
+#include "acenic.h"
+
+/*
+ * These must be defined before the firmware is included.
+ */
+#define MAX_TEXT_LEN	96*1024
+#define MAX_RODATA_LEN	8*1024
+#define MAX_DATA_LEN	2*1024
+
+#include "acenic_firmware.h"
+
+#ifndef tigon2FwReleaseLocal
+#define tigon2FwReleaseLocal 0
+#endif
+
+/*
+ * This driver currently supports Tigon I and Tigon II based cards
+ * including the Alteon AceNIC, the 3Com 3C985[B] and NetGear
+ * GA620. The driver should also work on the SGI, DEC and Farallon
+ * versions of the card, however I have not been able to test that
+ * myself.
+ *
+ * This card is really neat, it supports receive hardware checksumming
+ * and jumbo frames (up to 9000 bytes) and does a lot of work in the
+ * firmware. Also the programming interface is quite neat, except for
+ * the parts dealing with the i2c eeprom on the card ;-)
+ *
+ * Using jumbo frames:
+ *
+ * To enable jumbo frames, simply specify an mtu between 1500 and 9000
+ * bytes to ifconfig. Jumbo frames can be enabled or disabled at any time
+ * by running `ifconfig eth<X> mtu <MTU>' with <X> being the Ethernet
+ * interface number and <MTU> being the MTU value.
+ *
+ * Module parameters:
+ *
+ * When compiled as a loadable module, the driver allows for a number
+ * of module parameters to be specified. The driver supports the
+ * following module parameters:
+ *
+ *  trace=<val> - Firmware trace level. This requires special traced
+ *                firmware to replace the firmware supplied with
+ *                the driver - for debugging purposes only.
+ *
+ *  link=<val>  - Link state. Normally you want to use the default link
+ *                parameters set by the driver. This can be used to
+ *                override these in case your switch doesn't negotiate
+ *                the link properly. Valid values are:
+ *         0x0001 - Force half duplex link.
+ *         0x0002 - Do not negotiate line speed with the other end.
+ *         0x0010 - 10Mbit/sec link.
+ *         0x0020 - 100Mbit/sec link.
+ *         0x0040 - 1000Mbit/sec link.
+ *         0x0100 - Do not negotiate flow control.
+ *         0x0200 - Enable RX flow control Y
+ *         0x0400 - Enable TX flow control Y (Tigon II NICs only).
+ *                Default value is 0x0270, ie. enable link+flow
+ *                control negotiation. Negotiating the highest
+ *                possible link speed with RX flow control enabled.
+ *
+ *                When disabling link speed negotiation, only one link
+ *                speed is allowed to be specified!
+ *
+ *  tx_coal_tick=<val> - number of coalescing clock ticks (us) allowed
+ *                to wait for more packets to arive before
+ *                interrupting the host, from the time the first
+ *                packet arrives.
+ *
+ *  rx_coal_tick=<val> - number of coalescing clock ticks (us) allowed
+ *                to wait for more packets to arive in the transmit ring,
+ *                before interrupting the host, after transmitting the
+ *                first packet in the ring.
+ *
+ *  max_tx_desc=<val> - maximum number of transmit descriptors
+ *                (packets) transmitted before interrupting the host.
+ *
+ *  max_rx_desc=<val> - maximum number of receive descriptors
+ *                (packets) received before interrupting the host.
+ *
+ *  tx_ratio=<val> - 7 bit value (0 - 63) specifying the split in 64th
+ *                increments of the NIC's on board memory to be used for
+ *                transmit and receive buffers. For the 1MB NIC app. 800KB
+ *                is available, on the 1/2MB NIC app. 300KB is available.
+ *                68KB will always be available as a minimum for both
+ *                directions. The default value is a 50/50 split.
+ *  dis_pci_mem_inval=<val> - disable PCI memory write and invalidate
+ *                operations, default (1) is to always disable this as
+ *                that is what Alteon does on NT. I have not been able
+ *                to measure any real performance differences with
+ *                this on my systems. Set <val>=0 if you want to
+ *                enable these operations.
+ *
+ * If you use more than one NIC, specify the parameters for the
+ * individual NICs with a comma, ie. trace=0,0x00001fff,0 you want to
+ * run tracing on NIC #2 but not on NIC #1 and #3.
+ *
+ * TODO:
+ *
+ * - Proper multicast support.
+ * - NIC dump support.
+ * - More tuning parameters.
+ *
+ * The mini ring is not used under Linux and I am not sure it makes sense
+ * to actually use it.
+ *
+ * New interrupt handler strategy:
+ *
+ * The old interrupt handler worked using the traditional method of
+ * replacing an skbuff with a new one when a packet arrives. However
+ * the rx rings do not need to contain a static number of buffer
+ * descriptors, thus it makes sense to move the memory allocation out
+ * of the main interrupt handler and do it in a bottom half handler
+ * and only allocate new buffers when the number of buffers in the
+ * ring is below a certain threshold. In order to avoid starving the
+ * NIC under heavy load it is however necessary to force allocation
+ * when hitting a minimum threshold. The strategy for alloction is as
+ * follows:
+ *
+ *     RX_LOW_BUF_THRES    - allocate buffers in the bottom half
+ *     RX_PANIC_LOW_THRES  - we are very low on buffers, allocate
+ *                           the buffers in the interrupt handler
+ *     RX_RING_THRES       - maximum number of buffers in the rx ring
+ *     RX_MINI_THRES       - maximum number of buffers in the mini ring
+ *     RX_JUMBO_THRES      - maximum number of buffers in the jumbo ring
+ *
+ * One advantagous side effect of this allocation approach is that the
+ * entire rx processing can be done without holding any spin lock
+ * since the rx rings and registers are totally independent of the tx
+ * ring and its registers.  This of course includes the kmalloc's of
+ * new skb's. Thus start_xmit can run in parallel with rx processing
+ * and the memory allocation on SMP systems.
+ *
+ * Note that running the skb reallocation in a bottom half opens up
+ * another can of races which needs to be handled properly. In
+ * particular it can happen that the interrupt handler tries to run
+ * the reallocation while the bottom half is either running on another
+ * CPU or was interrupted on the same CPU. To get around this the
+ * driver uses bitops to prevent the reallocation routines from being
+ * reentered.
+ *
+ * TX handling can also be done without holding any spin lock, wheee
+ * this is fun! since tx_ret_csm is only written to by the interrupt
+ * handler. The case to be aware of is when shutting down the device
+ * and cleaning up where it is necessary to make sure that
+ * start_xmit() is not running while this is happening. Well DaveM
+ * informs me that this case is already protected against ... bye bye
+ * Mr. Spin Lock, it was nice to know you.
+ *
+ * TX interrupts are now partly disabled so the NIC will only generate
+ * TX interrupts for the number of coal ticks, not for the number of
+ * TX packets in the queue. This should reduce the number of TX only,
+ * ie. when no RX processing is done, interrupts seen.
+ */
+
+/*
+ * Threshold values for RX buffer allocation - the low water marks for
+ * when to start refilling the rings are set to 75% of the ring
+ * sizes. It seems to make sense to refill the rings entirely from the
+ * intrrupt handler once it gets below the panic threshold, that way
+ * we don't risk that the refilling is moved to another CPU when the
+ * one running the interrupt handler just got the slab code hot in its
+ * cache.
+ */
+#define RX_RING_SIZE		72
+#define RX_MINI_SIZE		64
+#define RX_JUMBO_SIZE		48
+
+#define RX_PANIC_STD_THRES	16
+#define RX_PANIC_STD_REFILL	(3*RX_PANIC_STD_THRES)/2
+#define RX_LOW_STD_THRES	(3*RX_RING_SIZE)/4
+#define RX_PANIC_MINI_THRES	12
+#define RX_PANIC_MINI_REFILL	(3*RX_PANIC_MINI_THRES)/2
+#define RX_LOW_MINI_THRES	(3*RX_MINI_SIZE)/4
+#define RX_PANIC_JUMBO_THRES	6
+#define RX_PANIC_JUMBO_REFILL	(3*RX_PANIC_JUMBO_THRES)/2
+#define RX_LOW_JUMBO_THRES	(3*RX_JUMBO_SIZE)/4
+
+
+/*
+ * Size of the mini ring entries, basically these just should be big
+ * enough to take TCP ACKs
+ */
+#define ACE_MINI_SIZE		100
+
+#define ACE_MINI_BUFSIZE	ACE_MINI_SIZE
+#define ACE_STD_BUFSIZE		(ACE_STD_MTU + ETH_HLEN + 4)
+#define ACE_JUMBO_BUFSIZE	(ACE_JUMBO_MTU + ETH_HLEN + 4)
+
+/*
+ * There seems to be a magic difference in the effect between 995 and 996
+ * but little difference between 900 and 995 ... no idea why.
+ *
+ * There is now a default set of tuning parameters which is set, depending
+ * on whether or not the user enables Jumbo frames. It's assumed that if
+ * Jumbo frames are enabled, the user wants optimal tuning for that case.
+ */
+#define DEF_TX_COAL		400 /* 996 */
+#define DEF_TX_MAX_DESC		60  /* was 40 */
+#define DEF_RX_COAL		120 /* 1000 */
+#define DEF_RX_MAX_DESC		25
+#define DEF_TX_RATIO		21 /* 24 */
+
+#define DEF_JUMBO_TX_COAL	20
+#define DEF_JUMBO_TX_MAX_DESC	60
+#define DEF_JUMBO_RX_COAL	30
+#define DEF_JUMBO_RX_MAX_DESC	6
+#define DEF_JUMBO_TX_RATIO	21
+
+#if tigon2FwReleaseLocal < 20001118
+/*
+ * Standard firmware and early modifications duplicate
+ * IRQ load without this flag (coal timer is never reset).
+ * Note that with this flag tx_coal should be less than
+ * time to xmit full tx ring.
+ * 400usec is not so bad for tx ring size of 128.
+ */
+#define TX_COAL_INTS_ONLY	1	/* worth it */
+#else
+/*
+ * With modified firmware, this is not necessary, but still useful.
+ */
+#define TX_COAL_INTS_ONLY	1
+#endif
+
+#define DEF_TRACE		0
+#define DEF_STAT		(2 * TICKS_PER_SEC)
+
+
+static int link[ACE_MAX_MOD_PARMS];
+static int trace[ACE_MAX_MOD_PARMS];
+static int tx_coal_tick[ACE_MAX_MOD_PARMS];
+static int rx_coal_tick[ACE_MAX_MOD_PARMS];
+static int max_tx_desc[ACE_MAX_MOD_PARMS];
+static int max_rx_desc[ACE_MAX_MOD_PARMS];
+static int tx_ratio[ACE_MAX_MOD_PARMS];
+static int dis_pci_mem_inval[ACE_MAX_MOD_PARMS] = {1, 1, 1, 1, 1, 1, 1, 1};
+
+MODULE_AUTHOR("Jes Sorensen <jes@trained-monkey.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("AceNIC/3C985/GA620 Gigabit Ethernet driver");
+
+module_param_array(link, int, NULL, 0);
+module_param_array(trace, int, NULL, 0);
+module_param_array(tx_coal_tick, int, NULL, 0);
+module_param_array(max_tx_desc, int, NULL, 0);
+module_param_array(rx_coal_tick, int, NULL, 0);
+module_param_array(max_rx_desc, int, NULL, 0);
+module_param_array(tx_ratio, int, NULL, 0);
+MODULE_PARM_DESC(link, "AceNIC/3C985/NetGear link state");
+MODULE_PARM_DESC(trace, "AceNIC/3C985/NetGear firmware trace level");
+MODULE_PARM_DESC(tx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first tx descriptor arrives");
+MODULE_PARM_DESC(max_tx_desc, "AceNIC/3C985/GA620 max number of transmit descriptors to wait");
+MODULE_PARM_DESC(rx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first rx descriptor arrives");
+MODULE_PARM_DESC(max_rx_desc, "AceNIC/3C985/GA620 max number of receive descriptors to wait");
+MODULE_PARM_DESC(tx_ratio, "AceNIC/3C985/GA620 ratio of NIC memory used for TX/RX descriptors (range 0-63)");
+
+
+static char version[] __devinitdata = 
+  "acenic.c: v0.92 08/05/2002  Jes Sorensen, linux-acenic@SunSITE.dk\n"
+  "                            http://home.cern.ch/~jes/gige/acenic.html\n";
+
+static int ace_get_settings(struct net_device *, struct ethtool_cmd *);
+static int ace_set_settings(struct net_device *, struct ethtool_cmd *);
+static void ace_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
+
+static struct ethtool_ops ace_ethtool_ops = {
+	.get_settings = ace_get_settings,
+	.set_settings = ace_set_settings,
+	.get_drvinfo = ace_get_drvinfo,
+};
+
+static void ace_watchdog(struct net_device *dev);
+
+static int __devinit acenic_probe_one(struct pci_dev *pdev,
+		const struct pci_device_id *id)
+{
+	struct net_device *dev;
+	struct ace_private *ap;
+	static int boards_found;
+
+	dev = alloc_etherdev(sizeof(struct ace_private));
+	if (dev == NULL) {
+		printk(KERN_ERR "acenic: Unable to allocate "
+		       "net_device structure!\n");
+		return -ENOMEM;
+	}
+
+	SET_MODULE_OWNER(dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	ap = dev->priv;
+	ap->pdev = pdev;
+	ap->name = pci_name(pdev);
+
+	dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
+#if ACENIC_DO_VLAN
+	dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
+	dev->vlan_rx_register = ace_vlan_rx_register;
+	dev->vlan_rx_kill_vid = ace_vlan_rx_kill_vid;
+#endif
+	if (1) {
+		dev->tx_timeout = &ace_watchdog;
+		dev->watchdog_timeo = 5*HZ;
+	}
+
+	dev->open = &ace_open;
+	dev->stop = &ace_close;
+	dev->hard_start_xmit = &ace_start_xmit;
+	dev->get_stats = &ace_get_stats;
+	dev->set_multicast_list = &ace_set_multicast_list;
+	SET_ETHTOOL_OPS(dev, &ace_ethtool_ops);
+	dev->set_mac_address = &ace_set_mac_addr;
+	dev->change_mtu = &ace_change_mtu;
+
+	/* we only display this string ONCE */
+	if (!boards_found)
+		printk(version);
+
+	if (pci_enable_device(pdev))
+		goto fail_free_netdev;
+
+	/*
+	 * Enable master mode before we start playing with the
+	 * pci_command word since pci_set_master() will modify
+	 * it.
+	 */
+	pci_set_master(pdev);
+
+	pci_read_config_word(pdev, PCI_COMMAND, &ap->pci_command);
+
+	/* OpenFirmware on Mac's does not set this - DOH.. */ 
+	if (!(ap->pci_command & PCI_COMMAND_MEMORY)) {
+		printk(KERN_INFO "%s: Enabling PCI Memory Mapped "
+		       "access - was not enabled by BIOS/Firmware\n",
+		       ap->name);
+		ap->pci_command = ap->pci_command | PCI_COMMAND_MEMORY;
+		pci_write_config_word(ap->pdev, PCI_COMMAND,
+				      ap->pci_command);
+		wmb();
+	}
+
+	pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &ap->pci_latency);
+	if (ap->pci_latency <= 0x40) {
+		ap->pci_latency = 0x40;
+		pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ap->pci_latency);
+	}
+
+	/*
+	 * Remap the regs into kernel space - this is abuse of
+	 * dev->base_addr since it was means for I/O port
+	 * addresses but who gives a damn.
+	 */
+	dev->base_addr = pci_resource_start(pdev, 0);
+	ap->regs = ioremap(dev->base_addr, 0x4000);
+	if (!ap->regs) {
+		printk(KERN_ERR "%s:  Unable to map I/O register, "
+		       "AceNIC %i will be disabled.\n",
+		       ap->name, boards_found);
+		goto fail_free_netdev;
+	}
+
+	switch(pdev->vendor) {
+	case PCI_VENDOR_ID_ALTEON:
+		if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9100T) {
+			printk(KERN_INFO "%s: Farallon PN9100-T ",
+			       ap->name);
+		} else {
+			printk(KERN_INFO "%s: Alteon AceNIC ",
+			       ap->name);
+		}
+		break;
+	case PCI_VENDOR_ID_3COM:
+		printk(KERN_INFO "%s: 3Com 3C985 ", ap->name);
+		break;
+	case PCI_VENDOR_ID_NETGEAR:
+		printk(KERN_INFO "%s: NetGear GA620 ", ap->name);
+		break;
+	case PCI_VENDOR_ID_DEC:
+		if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9000SX) {
+			printk(KERN_INFO "%s: Farallon PN9000-SX ",
+			       ap->name);
+			break;
+		}
+	case PCI_VENDOR_ID_SGI:
+		printk(KERN_INFO "%s: SGI AceNIC ", ap->name);
+		break;
+	default:
+		printk(KERN_INFO "%s: Unknown AceNIC ", ap->name);
+		break;
+	}
+
+	printk("Gigabit Ethernet at 0x%08lx, ", dev->base_addr);
+#ifdef __sparc__
+	printk("irq %s\n", __irq_itoa(pdev->irq));
+#else
+	printk("irq %i\n", pdev->irq);
+#endif
+
+#ifdef CONFIG_ACENIC_OMIT_TIGON_I
+	if ((readl(&ap->regs->HostCtrl) >> 28) == 4) {
+		printk(KERN_ERR "%s: Driver compiled without Tigon I"
+		       " support - NIC disabled\n", dev->name);
+		goto fail_uninit;
+	}
+#endif
+
+	if (ace_allocate_descriptors(dev))
+		goto fail_free_netdev;
+
+#ifdef MODULE
+	if (boards_found >= ACE_MAX_MOD_PARMS)
+		ap->board_idx = BOARD_IDX_OVERFLOW;
+	else
+		ap->board_idx = boards_found;
+#else
+	ap->board_idx = BOARD_IDX_STATIC;
+#endif
+
+	if (ace_init(dev))
+		goto fail_free_netdev;
+
+	if (register_netdev(dev)) {
+		printk(KERN_ERR "acenic: device registration failed\n");
+		goto fail_uninit;
+	}
+	ap->name = dev->name;
+
+	if (ap->pci_using_dac)
+		dev->features |= NETIF_F_HIGHDMA;
+
+	pci_set_drvdata(pdev, dev);
+
+	boards_found++;
+	return 0;
+
+ fail_uninit:
+	ace_init_cleanup(dev);
+ fail_free_netdev:
+	free_netdev(dev);
+	return -ENODEV;
+}
+
+static void __devexit acenic_remove_one(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct ace_private *ap = netdev_priv(dev);
+	struct ace_regs __iomem *regs = ap->regs;
+	short i;
+
+	unregister_netdev(dev);
+
+	writel(readl(&regs->CpuCtrl) | CPU_HALT, &regs->CpuCtrl);
+	if (ap->version >= 2)
+		writel(readl(&regs->CpuBCtrl) | CPU_HALT, &regs->CpuBCtrl);
+	
+	/*
+	 * This clears any pending interrupts
+	 */
+	writel(1, &regs->Mb0Lo);
+	readl(&regs->CpuCtrl);	/* flush */
+
+	/*
+	 * Make sure no other CPUs are processing interrupts
+	 * on the card before the buffers are being released.
+	 * Otherwise one might experience some `interesting'
+	 * effects.
+	 *
+	 * Then release the RX buffers - jumbo buffers were
+	 * already released in ace_close().
+	 */
+	ace_sync_irq(dev->irq);
+
+	for (i = 0; i < RX_STD_RING_ENTRIES; i++) {
+		struct sk_buff *skb = ap->skb->rx_std_skbuff[i].skb;
+
+		if (skb) {
+			struct ring_info *ringp;
+			dma_addr_t mapping;
+
+			ringp = &ap->skb->rx_std_skbuff[i];
+			mapping = pci_unmap_addr(ringp, mapping);
+			pci_unmap_page(ap->pdev, mapping,
+				       ACE_STD_BUFSIZE,
+				       PCI_DMA_FROMDEVICE);
+
+			ap->rx_std_ring[i].size = 0;
+			ap->skb->rx_std_skbuff[i].skb = NULL;
+			dev_kfree_skb(skb);
+		}
+	}
+
+	if (ap->version >= 2) {
+		for (i = 0; i < RX_MINI_RING_ENTRIES; i++) {
+			struct sk_buff *skb = ap->skb->rx_mini_skbuff[i].skb;
+
+			if (skb) {
+				struct ring_info *ringp;
+				dma_addr_t mapping;
+
+				ringp = &ap->skb->rx_mini_skbuff[i];
+				mapping = pci_unmap_addr(ringp,mapping);
+				pci_unmap_page(ap->pdev, mapping,
+					       ACE_MINI_BUFSIZE,
+					       PCI_DMA_FROMDEVICE);
+
+				ap->rx_mini_ring[i].size = 0;
+				ap->skb->rx_mini_skbuff[i].skb = NULL;
+				dev_kfree_skb(skb);
+			}
+		}
+	}
+
+	for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) {
+		struct sk_buff *skb = ap->skb->rx_jumbo_skbuff[i].skb;
+		if (skb) {
+			struct ring_info *ringp;
+			dma_addr_t mapping;
+
+			ringp = &ap->skb->rx_jumbo_skbuff[i];
+			mapping = pci_unmap_addr(ringp, mapping);
+			pci_unmap_page(ap->pdev, mapping,
+				       ACE_JUMBO_BUFSIZE,
+				       PCI_DMA_FROMDEVICE);
+
+			ap->rx_jumbo_ring[i].size = 0;
+			ap->skb->rx_jumbo_skbuff[i].skb = NULL;
+			dev_kfree_skb(skb);
+		}
+	}
+
+	ace_init_cleanup(dev);
+	free_netdev(dev);
+}
+
+static struct pci_driver acenic_pci_driver = {
+	.name		= "acenic",
+	.id_table	= acenic_pci_tbl,
+	.probe		= acenic_probe_one,
+	.remove		= __devexit_p(acenic_remove_one),
+};
+
+static int __init acenic_init(void)
+{
+	return pci_module_init(&acenic_pci_driver);
+}
+
+static void __exit acenic_exit(void)
+{
+	pci_unregister_driver(&acenic_pci_driver);
+}
+
+module_init(acenic_init);
+module_exit(acenic_exit);
+
+static void ace_free_descriptors(struct net_device *dev)
+{
+	struct ace_private *ap = netdev_priv(dev);
+	int size;
+
+	if (ap->rx_std_ring != NULL) {
+		size = (sizeof(struct rx_desc) *
+			(RX_STD_RING_ENTRIES +
+			 RX_JUMBO_RING_ENTRIES +
+			 RX_MINI_RING_ENTRIES +
+			 RX_RETURN_RING_ENTRIES));
+		pci_free_consistent(ap->pdev, size, ap->rx_std_ring,
+				    ap->rx_ring_base_dma);
+		ap->rx_std_ring = NULL;
+		ap->rx_jumbo_ring = NULL;
+		ap->rx_mini_ring = NULL;
+		ap->rx_return_ring = NULL;
+	}
+	if (ap->evt_ring != NULL) {
+		size = (sizeof(struct event) * EVT_RING_ENTRIES);
+		pci_free_consistent(ap->pdev, size, ap->evt_ring,
+				    ap->evt_ring_dma);
+		ap->evt_ring = NULL;
+	}
+	if (ap->tx_ring != NULL && !ACE_IS_TIGON_I(ap)) {
+		size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES);
+		pci_free_consistent(ap->pdev, size, ap->tx_ring,
+				    ap->tx_ring_dma);
+	}
+	ap->tx_ring = NULL;
+
+	if (ap->evt_prd != NULL) {
+		pci_free_consistent(ap->pdev, sizeof(u32),
+				    (void *)ap->evt_prd, ap->evt_prd_dma);
+		ap->evt_prd = NULL;
+	}
+	if (ap->rx_ret_prd != NULL) {
+		pci_free_consistent(ap->pdev, sizeof(u32),
+				    (void *)ap->rx_ret_prd,
+				    ap->rx_ret_prd_dma);
+		ap->rx_ret_prd = NULL;
+	}
+	if (ap->tx_csm != NULL) {
+		pci_free_consistent(ap->pdev, sizeof(u32),
+				    (void *)ap->tx_csm, ap->tx_csm_dma);
+		ap->tx_csm = NULL;
+	}
+}
+
+
+static int ace_allocate_descriptors(struct net_device *dev)
+{
+	struct ace_private *ap = netdev_priv(dev);
+	int size;
+
+	size = (sizeof(struct rx_desc) *
+		(RX_STD_RING_ENTRIES +
+		 RX_JUMBO_RING_ENTRIES +
+		 RX_MINI_RING_ENTRIES +
+		 RX_RETURN_RING_ENTRIES));
+
+	ap->rx_std_ring = pci_alloc_consistent(ap->pdev, size,
+					       &ap->rx_ring_base_dma);
+	if (ap->rx_std_ring == NULL)
+		goto fail;
+
+	ap->rx_jumbo_ring = ap->rx_std_ring + RX_STD_RING_ENTRIES;
+	ap->rx_mini_ring = ap->rx_jumbo_ring + RX_JUMBO_RING_ENTRIES;
+	ap->rx_return_ring = ap->rx_mini_ring + RX_MINI_RING_ENTRIES;
+
+	size = (sizeof(struct event) * EVT_RING_ENTRIES);
+
+	ap->evt_ring = pci_alloc_consistent(ap->pdev, size, &ap->evt_ring_dma);
+
+	if (ap->evt_ring == NULL)
+		goto fail;
+
+	/*
+	 * Only allocate a host TX ring for the Tigon II, the Tigon I
+	 * has to use PCI registers for this ;-(
+	 */
+	if (!ACE_IS_TIGON_I(ap)) {
+		size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES);
+
+		ap->tx_ring = pci_alloc_consistent(ap->pdev, size,
+						   &ap->tx_ring_dma);
+
+		if (ap->tx_ring == NULL)
+			goto fail;
+	}
+
+	ap->evt_prd = pci_alloc_consistent(ap->pdev, sizeof(u32),
+					   &ap->evt_prd_dma);
+	if (ap->evt_prd == NULL)
+		goto fail;
+
+	ap->rx_ret_prd = pci_alloc_consistent(ap->pdev, sizeof(u32),
+					      &ap->rx_ret_prd_dma);
+	if (ap->rx_ret_prd == NULL)
+		goto fail;
+
+	ap->tx_csm = pci_alloc_consistent(ap->pdev, sizeof(u32),
+					  &ap->tx_csm_dma);
+	if (ap->tx_csm == NULL)
+		goto fail;
+
+	return 0;
+
+fail:
+	/* Clean up. */
+	ace_init_cleanup(dev);
+	return 1;
+}
+
+
+/*
+ * Generic cleanup handling data allocated during init. Used when the
+ * module is unloaded or if an error occurs during initialization
+ */
+static void ace_init_cleanup(struct net_device *dev)
+{
+	struct ace_private *ap;
+
+	ap = netdev_priv(dev);
+
+	ace_free_descriptors(dev);
+
+	if (ap->info)
+		pci_free_consistent(ap->pdev, sizeof(struct ace_info),
+				    ap->info, ap->info_dma);
+	if (ap->skb)
+		kfree(ap->skb);
+	if (ap->trace_buf)
+		kfree(ap->trace_buf);
+
+	if (dev->irq)
+		free_irq(dev->irq, dev);
+
+	iounmap(ap->regs);
+}
+
+
+/*
+ * Commands are considered to be slow.
+ */
+static inline void ace_issue_cmd(struct ace_regs __iomem *regs, struct cmd *cmd)
+{
+	u32 idx;
+
+	idx = readl(&regs->CmdPrd);
+
+	writel(*(u32 *)(cmd), &regs->CmdRng[idx]);
+	idx = (idx + 1) % CMD_RING_ENTRIES;
+
+	writel(idx, &regs->CmdPrd);
+}
+
+
+static int __devinit ace_init(struct net_device *dev)
+{
+	struct ace_private *ap;
+	struct ace_regs __iomem *regs;
+	struct ace_info *info = NULL;
+	struct pci_dev *pdev;
+	unsigned long myjif;
+	u64 tmp_ptr;
+	u32 tig_ver, mac1, mac2, tmp, pci_state;
+	int board_idx, ecode = 0;
+	short i;
+	unsigned char cache_size;
+
+	ap = netdev_priv(dev);
+	regs = ap->regs;
+
+	board_idx = ap->board_idx;
+
+	/*
+	 * aman@sgi.com - its useful to do a NIC reset here to
+	 * address the `Firmware not running' problem subsequent
+	 * to any crashes involving the NIC
+	 */
+	writel(HW_RESET | (HW_RESET << 24), &regs->HostCtrl);
+	readl(&regs->HostCtrl);		/* PCI write posting */
+	udelay(5);
+
+	/*
+	 * Don't access any other registers before this point!
+	 */
+#ifdef __BIG_ENDIAN
+	/*
+	 * This will most likely need BYTE_SWAP once we switch
+	 * to using __raw_writel()
+	 */
+	writel((WORD_SWAP | CLR_INT | ((WORD_SWAP | CLR_INT) << 24)),
+	       &regs->HostCtrl);
+#else
+	writel((CLR_INT | WORD_SWAP | ((CLR_INT | WORD_SWAP) << 24)),
+	       &regs->HostCtrl);
+#endif
+	readl(&regs->HostCtrl);		/* PCI write posting */
+
+	/*
+	 * Stop the NIC CPU and clear pending interrupts
+	 */
+	writel(readl(&regs->CpuCtrl) | CPU_HALT, &regs->CpuCtrl);
+	readl(&regs->CpuCtrl);		/* PCI write posting */
+	writel(0, &regs->Mb0Lo);
+
+	tig_ver = readl(&regs->HostCtrl) >> 28;
+
+	switch(tig_ver){
+#ifndef CONFIG_ACENIC_OMIT_TIGON_I
+	case 4:
+	case 5:
+		printk(KERN_INFO "  Tigon I  (Rev. %i), Firmware: %i.%i.%i, ",
+		       tig_ver, tigonFwReleaseMajor, tigonFwReleaseMinor,
+		       tigonFwReleaseFix);
+		writel(0, &regs->LocalCtrl);
+		ap->version = 1;
+		ap->tx_ring_entries = TIGON_I_TX_RING_ENTRIES;
+		break;
+#endif
+	case 6:
+		printk(KERN_INFO "  Tigon II (Rev. %i), Firmware: %i.%i.%i, ",
+		       tig_ver, tigon2FwReleaseMajor, tigon2FwReleaseMinor,
+		       tigon2FwReleaseFix);
+		writel(readl(&regs->CpuBCtrl) | CPU_HALT, &regs->CpuBCtrl);
+		readl(&regs->CpuBCtrl);		/* PCI write posting */
+		/*
+		 * The SRAM bank size does _not_ indicate the amount
+		 * of memory on the card, it controls the _bank_ size!
+		 * Ie. a 1MB AceNIC will have two banks of 512KB.
+		 */
+		writel(SRAM_BANK_512K, &regs->LocalCtrl);
+		writel(SYNC_SRAM_TIMING, &regs->MiscCfg);
+		ap->version = 2;
+		ap->tx_ring_entries = MAX_TX_RING_ENTRIES;
+		break;
+	default:
+		printk(KERN_WARNING "  Unsupported Tigon version detected "
+		       "(%i)\n", tig_ver);
+		ecode = -ENODEV;
+		goto init_error;
+	}
+
+	/*
+	 * ModeStat _must_ be set after the SRAM settings as this change
+	 * seems to corrupt the ModeStat and possible other registers.
+	 * The SRAM settings survive resets and setting it to the same
+	 * value a second time works as well. This is what caused the
+	 * `Firmware not running' problem on the Tigon II.
+	 */
+#ifdef __BIG_ENDIAN
+	writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | ACE_BYTE_SWAP_BD |
+	       ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, &regs->ModeStat);
+#else
+	writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL |
+	       ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, &regs->ModeStat);
+#endif
+	readl(&regs->ModeStat);		/* PCI write posting */
+
+	mac1 = 0;
+	for(i = 0; i < 4; i++) {
+		mac1 = mac1 << 8;
+		tmp = read_eeprom_byte(dev, 0x8c+i);
+		if (tmp < 0) {
+			ecode = -EIO;
+			goto init_error;
+		} else
+			mac1 |= (tmp & 0xff);
+	}
+	mac2 = 0;
+	for(i = 4; i < 8; i++) {
+		mac2 = mac2 << 8;
+		tmp = read_eeprom_byte(dev, 0x8c+i);
+		if (tmp < 0) {
+			ecode = -EIO;
+			goto init_error;
+		} else
+			mac2 |= (tmp & 0xff);
+	}
+
+	writel(mac1, &regs->MacAddrHi);
+	writel(mac2, &regs->MacAddrLo);
+
+	printk("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
+	       (mac1 >> 8) & 0xff, mac1 & 0xff, (mac2 >> 24) &0xff,
+	       (mac2 >> 16) & 0xff, (mac2 >> 8) & 0xff, mac2 & 0xff);
+
+	dev->dev_addr[0] = (mac1 >> 8) & 0xff;
+	dev->dev_addr[1] = mac1 & 0xff;
+	dev->dev_addr[2] = (mac2 >> 24) & 0xff;
+	dev->dev_addr[3] = (mac2 >> 16) & 0xff;
+	dev->dev_addr[4] = (mac2 >> 8) & 0xff;
+	dev->dev_addr[5] = mac2 & 0xff;
+
+	/*
+	 * Looks like this is necessary to deal with on all architectures,
+	 * even this %$#%$# N440BX Intel based thing doesn't get it right.
+	 * Ie. having two NICs in the machine, one will have the cache
+	 * line set at boot time, the other will not.
+	 */
+	pdev = ap->pdev;
+	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_size);
+	cache