The LDT fixes in particular fix some potentially random strange behaviour.

[davej-history.git] / drivers / net / 3c59x.c

/* EtherLinkXL.c: A 3Com EtherLink PCI III/XL ethernet driver for linux. */
/*
        Written 1996-1999 by Donald Becker.

        This software may be used and distributed according to the terms
        of the GNU Public License, incorporated herein by reference.

        This driver is for the 3Com "Vortex" and "Boomerang" series ethercards.
        Members of the series include Fast EtherLink 3c590/3c592/3c595/3c597
        and the EtherLink XL 3c900 and 3c905 cards.

        The author may be reached as becker@scyld.com, or C/O
        Center of Excellence in Space Data and Information Sciences
           Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771

        Linux Kernel Additions:
        
        0.99H+lk0.9 - David S. Miller - softnet, PCI DMA updates
        0.99H+lk1.0 - Jeff Garzik <jgarzik@mandrakesoft.com>
                Remove compatibility defines for kernel versions < 2.2.x.
                Update for new 2.3.x module interface
        LK1.1.2 (March 19, 2000)
        * New PCI interface (jgarzik)

    LK1.1.3 25 April 2000, Andrew Morton <andrewm@uow.edu.au>
    - Merged with 3c575_cb.c
    - Don't set RxComplete in boomerang interrupt enable reg
    - spinlock in vortex_timer to protect mdio functions
    - disable local interrupts around call to vortex_interrupt in
      vortex_tx_timeout() (So vortex_interrupt can use spin_lock())
    - Select window 3 in vortex_timer()'s write to Wn3_MAC_Ctrl
    - In vortex_start_xmit(), move the lock to _after_ we've altered
      vp->cur_tx and vp->tx_full.  This defeats the race between
      vortex_start_xmit() and vortex_interrupt which was identified
      by Bogdan Costescu.
    - Merged back support for six new cards from various sources
    - Set vortex_have_pci if pci_module_init returns zero (fixes cardbus
      insertion oops)
    - Tell it that 3c905C has NWAY for 100bT autoneg
    - Fix handling of SetStatusEnd in 'Too much work..' code, as
      per 2.3.99's 3c575_cb (Dave Hinds).
    - Split ISR into two for vortex & boomerang
    - Fix MOD_INC/DEC races
    - Handle resource allocation failures.
    - Fix 3CCFE575CT LED polarity
    - Make tx_interrupt_mitigation the default

    LK1.1.4 25 April 2000, Andrew Morton <andrewm@uow.edu.au>    
    - Add extra TxReset to vortex_up() to fix 575_cb hotplug initialisation probs.
    - Put vortex_info_tbl into __devinitdata
    - In the vortex_error StatsFull HACK, disable stats in vp->intr_enable as well
      as in the hardware.
    - Increased the loop counter in wait_for_completion from 2,000 to 4,000.

    LK1.1.5 28 April 2000, andrewm
    - Added powerpc defines (John Daniel <jdaniel@etresoft.com> said these work...)
    - Some extra diagnostics
    - In vortex_error(), reset the Tx on maxCollisions.  Otherwise most
      chips usually get a Tx timeout.
    - Added extra_reset module parm
    - Replaced some inline timer manip with mod_timer
      (Franois romieu <Francois.Romieu@nic.fr>)
    - In vortex_up(), don't make Wn3_config initialisation dependent upon has_nway
      (this came across from 3c575_cb).

    LK1.1.6 06 Jun 2000, andrewm
    - Backed out the PPC defines.
    - Use del_timer_sync(), mod_timer().
    - Fix wrapped ulong comparison in boomerang_rx()
    - Add IS_TORNADO, use it to suppress 3c905C checksum error msg
      (Donald Becker, I Lee Hetherington <ilh@sls.lcs.mit.edu>)
    - Replace union wn3_config with BFINS/BFEXT manipulation for
      sparc64 (Pete Zaitcev, Peter Jones)
    - In vortex_error, do_tx_reset and vortex_tx_timeout(Vortex):
      do a netif_wake_queue() to better recover from errors. (Anders Pedersen,
      Donald Becker)
    - Print a warning on out-of-memory (rate limited to 1 per 10 secs)
    - Added two more Cardbus 575 NICs: 5b57 and 6564 (Paul Wagland)

    LK1.1.7 2 Jul 2000 andrewm
    - Better handling of shared IRQs
    - Reset the transmitter on a Tx reclaim error
    - Fixed crash under OOM during vortex_open() (Mark Hemment)
    - Fix Rx cessation problem during OOM (help from Mark Hemment)
    - The spinlocks around the mdio access were blocking interrupts for 300uS.
      Fix all this to use spin_lock_bh() within mdio_read/write
    - Only write to TxFreeThreshold if it's a boomerang - other NICs don't
      have one.
    - Added 802.3x MAC-layer flow control support

   LK1.1.8 13 Aug 2000 andrewm
    - Ignore request_region() return value - already reserved if Cardbus.
    - Merged some additional Cardbus flags from Don's 0.99Qk
    - Some fixes for 3c556 (Fred Maciel)
    - Fix for EISA initialisation (Jan Rkorajski)
    - Renamed MII_XCVR_PWR and EEPROM_230 to align with 3c575_cb and D. Becker's drivers
    - Fixed MII_XCVR_PWR for 3CCFE575CT
    - Added INVERT_LED_PWR, used it.
    - Backed out the extra_reset stuff

   LK1.1.9 12 Sep 2000 andrewm
    - Backed out the tx_reset_resume flags.  It was a no-op.
    - In vortex_error, don't reset the Tx on txReclaim errors
    - In vortex_error, don't reset the Tx on maxCollisions errors.
      Hence backed out all the DownListPtr logic here.
    - In vortex_error, give Tornado cards a partial TxReset on
      maxCollisions (David Hinds).  Defined MAX_COLLISION_RESET for this.
    - Redid some driver flags and device names based on pcmcia_cs-3.1.20.
    - Fixed a bug where, if vp->tx_full is set when the interface
      is downed, it remains set when the interface is upped.  Bad
      things happen.

   LK1.1.10 17 Sep 2000 andrewm
    - Added EEPROM_8BIT for 3c555 (Fred Maciel)
    - Added experimental support for the 3c556B Laptop Hurricane (Louis Gerbarg)
    - Add HAS_NWAY to "3c900 Cyclone 10Mbps TPO"

   LK1.1.11 13 Nov 2000 andrewm
    - Dump MOD_INC/DEC_USE_COUNT, use SET_MODULE_OWNER

    - See http://www.uow.edu.au/~andrewm/linux/#3c59x-2.3 for more details.
    - Also see Documentation/networking/vortex.txt
*/

/*
 * FIXME: This driver _could_ support MTU changing, but doesn't.  See Don's hamaci.c implementation
 * as well as other drivers
 *
 * NOTE: If you make 'vortex_debug' a constant (#define vortex_debug 0) the driver shrinks by 2k
 * due to dead code elimination.  There will be some performance benefits from this due to
 * elimination of all the tests and reduced cache footprint.
 */

/* A few values that may be tweaked. */
/* Keep the ring sizes a power of two for efficiency. */
#define TX_RING_SIZE    16
#define RX_RING_SIZE    32
#define PKT_BUF_SZ              1536                    /* Size of each temporary Rx buffer.*/

/* "Knobs" that adjust features and parameters. */
/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
   Setting to > 1512 effectively disables this feature. */
static const int rx_copybreak = 200;
/* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */
static const int mtu = 1500;
/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
static int max_interrupt_work = 32;
/* Tx timeout interval (millisecs) */
static int watchdog = 400;

/* Allow aggregation of Tx interrupts.  Saves CPU load at the cost
 * of possible Tx stalls if the system is blocking interrupts
 * somewhere else.  Undefine this to disable.
 * AKPM 26 April 2000: enabling this still gets vestigial Tx timeouts
 * in a heavily loaded (collision-prone) 10BaseT LAN.  Should be OK with
 * switched Ethernet.
 * AKPM 24May00: vestigial timeouts have been removed by later fixes.
 */
#define tx_interrupt_mitigation 1

/* Put out somewhat more debugging messages. (0: no msg, 1 minimal .. 6). */
#define vortex_debug debug
#ifdef VORTEX_DEBUG
static int vortex_debug = VORTEX_DEBUG;
#else
static int vortex_debug = 1;
#endif

/* Some values here only for performance evaluation and path-coverage
   debugging. */
static int rx_nocopy = 0, rx_copy = 0, queued_packet = 0, rx_csumhits;

#ifndef __OPTIMIZE__
#error You must compile this file with the correct options!
#error See the last lines of the source file.
#error You must compile this driver with "-O".
#endif

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/ioport.h>
#include <linux/malloc.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 <asm/irq.h>                    /* For NR_IRQS only. */
#include <asm/bitops.h>
#include <asm/io.h>

/* Kernel compatibility defines, some common to David Hinds' PCMCIA package.
   This is only in the support-all-kernels source code. */

#define RUN_AT(x) (jiffies + (x))

#include <linux/delay.h>

static char version[] __devinitdata =
"3c59x.c:LK1.1.11 13 Nov 2000  Donald Becker and others. http://www.scyld.com/network/vortex.html " "$Revision: 1.102.2.46 $\n";

MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
MODULE_DESCRIPTION("3Com 3c59x/3c90x/3c575 series Vortex/Boomerang/Cyclone driver");
MODULE_PARM(debug, "i");
MODULE_PARM(options, "1-" __MODULE_STRING(8) "i");
MODULE_PARM(full_duplex, "1-" __MODULE_STRING(8) "i");
MODULE_PARM(flow_ctrl, "1-" __MODULE_STRING(8) "i");
MODULE_PARM(rx_copybreak, "i");
MODULE_PARM(max_interrupt_work, "i");
MODULE_PARM(compaq_ioaddr, "i");
MODULE_PARM(compaq_irq, "i");
MODULE_PARM(compaq_device_id, "i");
MODULE_PARM(watchdog, "i");

/* Operational parameter that usually are not changed. */

/* The Vortex size is twice that of the original EtherLinkIII series: the
   runtime register window, window 1, is now always mapped in.
   The Boomerang size is twice as large as the Vortex -- it has additional
   bus master control registers. */
#define VORTEX_TOTAL_SIZE 0x20
#define BOOMERANG_TOTAL_SIZE 0x40

/* Set iff a MII transceiver on any interface requires mdio preamble.
   This only set with the original DP83840 on older 3c905 boards, so the extra
   code size of a per-interface flag is not worthwhile. */
static char mii_preamble_required;

#define PFX "3c59x: "



/*
                                Theory of Operation

I. Board Compatibility

This device driver is designed for the 3Com FastEtherLink and FastEtherLink
XL, 3Com's PCI to 10/100baseT adapters.  It also works with the 10Mbs
versions of the FastEtherLink cards.  The supported product IDs are
  3c590, 3c592, 3c595, 3c597, 3c900, 3c905

The related ISA 3c515 is supported with a separate driver, 3c515.c, included
with the kernel source or available from
    cesdis.gsfc.nasa.gov:/pub/linux/drivers/3c515.html

II. Board-specific settings

PCI bus devices are configured by the system at boot time, so no jumpers
need to be set on the board.  The system BIOS should be set to assign the
PCI INTA signal to an otherwise unused system IRQ line.

The EEPROM settings for media type and forced-full-duplex are observed.
The EEPROM media type should be left at the default "autoselect" unless using
10base2 or AUI connections which cannot be reliably detected.

III. Driver operation

The 3c59x series use an interface that's very similar to the previous 3c5x9
series.  The primary interface is two programmed-I/O FIFOs, with an
alternate single-contiguous-region bus-master transfer (see next).

The 3c900 "Boomerang" series uses a full-bus-master interface with separate
lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet,
DEC Tulip and Intel Speedo3.  The first chip version retains a compatible
programmed-I/O interface that has been removed in 'B' and subsequent board
revisions.

One extension that is advertised in a very large font is that the adapters
are capable of being bus masters.  On the Vortex chip this capability was
only for a single contiguous region making it far less useful than the full
bus master capability.  There is a significant performance impact of taking
an extra interrupt or polling for the completion of each transfer, as well
as difficulty sharing the single transfer engine between the transmit and
receive threads.  Using DMA transfers is a win only with large blocks or
with the flawed versions of the Intel Orion motherboard PCI controller.

The Boomerang chip's full-bus-master interface is useful, and has the
currently-unused advantages over other similar chips that queued transmit
packets may be reordered and receive buffer groups are associated with a
single frame.

With full-bus-master support, this driver uses a "RX_COPYBREAK" scheme.
Rather than a fixed intermediate receive buffer, this scheme allocates
full-sized skbuffs as receive buffers.  The value RX_COPYBREAK is used as
the copying breakpoint: it is chosen to trade-off the memory wasted by
passing the full-sized skbuff to the queue layer for all frames vs. the
copying cost of copying a frame to a correctly-sized skbuff.

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.

IV. Notes

Thanks to Cameron Spitzer and Terry Murphy of 3Com for providing development
3c590, 3c595, and 3c900 boards.
The name "Vortex" is the internal 3Com project name for the PCI ASIC, and
the EISA version is called "Demon".  According to Terry these names come
from rides at the local amusement park.

The new chips support both ethernet (1.5K) and FDDI (4.5K) packet sizes!
This driver only supports ethernet packets because of the skbuff allocation
limit of 4K.
*/

/* This table drives the PCI probe routines.  It's mostly boilerplate in all
   of the drivers, and will likely be provided by some future kernel.
*/
enum pci_flags_bit {
        PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
        PCI_ADDR0=0x10<<0, PCI_ADDR1=0x10<<1, PCI_ADDR2=0x10<<2, PCI_ADDR3=0x10<<3,
};

enum {  IS_VORTEX=1, IS_BOOMERANG=2, IS_CYCLONE=4, IS_TORNADO=8,
        EEPROM_8BIT=0x10,       /* AKPM: Uses 0x230 as the base bitmaps for EEPROM reads */
        HAS_PWR_CTRL=0x20, HAS_MII=0x40, HAS_NWAY=0x80, HAS_CB_FNS=0x100,
        INVERT_MII_PWR=0x200, INVERT_LED_PWR=0x400, MAX_COLLISION_RESET=0x800,
        EEPROM_OFFSET=0x1000 };

enum vortex_chips {
        CH_3C590 = 0,
        CH_3C592,
        CH_3C597,
        CH_3C595_1,
        CH_3C595_2,

        CH_3C595_3,
        CH_3C900_1,
        CH_3C900_2,
        CH_3C900_3,
        CH_3C900_4,

        CH_3C900_5,
        CH_3C900B_FL,
        CH_3C905_1,
        CH_3C905_2,
        CH_3C905B_1,

        CH_3C905B_2,
        CH_3C905B_FX,
        CH_3C905C,
        CH_3C980,
        CH_3C9805,

        CH_3CSOHO100_TX,
        CH_3C555,
        CH_3C556,
        CH_3C556B,
        CH_3C575,

        CH_3C575_1,
        CH_3CCFE575,
        CH_3CCFE575CT,
        CH_3CCFE656,
        CH_3CCFEM656,

        CH_3CCFEM656_1,
        CH_3C450,
};


/* note: this array directly indexed by above enums, and MUST
 * be kept in sync with both the enums above, and the PCI device
 * table below
 */
static struct vortex_chip_info {
        const char *name;
        int flags;
        int drv_flags;
        int io_size;
} vortex_info_tbl[] __devinitdata = {
#define EISA_TBL_OFFSET 0               /* Offset of this entry for vortex_eisa_init */
        {"3c590 Vortex 10Mbps",
         PCI_USES_IO|PCI_USES_MASTER, IS_VORTEX, 32, },
        {"3c592 EISA 10mbps Demon/Vortex",                                      /* AKPM: from Don's 3c59x_cb.c 0.49H */
         PCI_USES_IO|PCI_USES_MASTER, IS_VORTEX, 32, },
        {"3c597 EISA Fast Demon/Vortex",                                        /* AKPM: from Don's 3c59x_cb.c 0.49H */
         PCI_USES_IO|PCI_USES_MASTER, IS_VORTEX, 32, },
        {"3c595 Vortex 100baseTx",
         PCI_USES_IO|PCI_USES_MASTER, IS_VORTEX, 32, },
        {"3c595 Vortex 100baseT4",
         PCI_USES_IO|PCI_USES_MASTER, IS_VORTEX, 32, },

        {"3c595 Vortex 100base-MII",
         PCI_USES_IO|PCI_USES_MASTER, IS_VORTEX, 32, },
        {"3c900 Boomerang 10baseT",
         PCI_USES_IO|PCI_USES_MASTER, IS_BOOMERANG, 64, },
        {"3c900 Boomerang 10Mbps Combo",
         PCI_USES_IO|PCI_USES_MASTER, IS_BOOMERANG, 64, },
        {"3c900 Cyclone 10Mbps TPO",                                            /* AKPM: from Don's 0.99M */
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY, 128, },
        {"3c900 Cyclone 10Mbps Combo",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE, 128, },

        {"3c900 Cyclone 10Mbps TPC",                                            /* AKPM: from Don's 0.99M */
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE, 128, },
        {"3c900B-FL Cyclone 10base-FL",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE, 128, },
        {"3c905 Boomerang 100baseTx",
         PCI_USES_IO|PCI_USES_MASTER, IS_BOOMERANG|HAS_MII, 64, },
        {"3c905 Boomerang 100baseT4",
         PCI_USES_IO|PCI_USES_MASTER, IS_BOOMERANG|HAS_MII, 64, },
        {"3c905B Cyclone 100baseTx",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY, 128, },

        {"3c905B Cyclone 10/100/BNC",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY, 128, },
        {"3c905B-FX Cyclone 100baseFx",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE, 128, },
        {"3c905C Tornado",
         PCI_USES_IO|PCI_USES_MASTER, IS_TORNADO|HAS_NWAY, 128, },
        {"3c980 Cyclone",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE, 128, },
        {"3c980 10/100 Base-TX NIC(Python-T)",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE, 128, },

        {"3cSOHO100-TX Hurricane",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE, 128, },
        {"3c555 Laptop Hurricane",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE|EEPROM_8BIT, 128, },
        {"3c556 Laptop Tornado",
         PCI_USES_IO|PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|EEPROM_8BIT|HAS_CB_FNS|INVERT_MII_PWR, 128, },
        {"3c556B Laptop Hurricane",
         PCI_USES_IO|PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|EEPROM_OFFSET|HAS_CB_FNS|INVERT_MII_PWR, 128, },
        {"3c575 [Megahertz] 10/100 LAN  CardBus",
         PCI_USES_IO|PCI_USES_MASTER, IS_BOOMERANG|HAS_MII|EEPROM_8BIT, 128, },

        {"3c575 Boomerang CardBus",
         PCI_USES_IO|PCI_USES_MASTER, IS_BOOMERANG|HAS_MII|EEPROM_8BIT, 128, },
        {"3CCFE575BT Cyclone CardBus",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_LED_PWR, 128, },
        {"3CCFE575CT Tornado CardBus",
         PCI_USES_IO|PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|MAX_COLLISION_RESET, 128, },
        {"3CCFE656 Cyclone CardBus",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|INVERT_LED_PWR, 128, },
        {"3CCFEM656B Cyclone+Winmodem CardBus",
         PCI_USES_IO|PCI_USES_MASTER, IS_CYCLONE|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|INVERT_LED_PWR, 128, },

        {"3CXFEM656C Tornado+Winmodem CardBus",                 /* From pcmcia-cs-3.1.5 */
         PCI_USES_IO|PCI_USES_MASTER, IS_TORNADO|HAS_NWAY|HAS_CB_FNS|EEPROM_8BIT|INVERT_MII_PWR|MAX_COLLISION_RESET, 128, },
        {"3c450 HomePNA Tornado",                                               /* AKPM: from Don's 0.99Q */
         PCI_USES_IO|PCI_USES_MASTER, IS_TORNADO|HAS_NWAY, 128, },
        {0,}, /* 0 terminated list. */
};


static struct pci_device_id vortex_pci_tbl[] __devinitdata = {
        { 0x10B7, 0x5900, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C590 },
        { 0x10B7, 0x5920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C592 },
        { 0x10B7, 0x5970, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C597 },
        { 0x10B7, 0x5950, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C595_1 },
        { 0x10B7, 0x5951, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C595_2 },

        { 0x10B7, 0x5952, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C595_3 },
        { 0x10B7, 0x9000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_1 },
        { 0x10B7, 0x9001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_2 },
        { 0x10B7, 0x9004, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_3 },
        { 0x10B7, 0x9005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_4 },

        { 0x10B7, 0x9006, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900_5 },
        { 0x10B7, 0x900A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C900B_FL },
        { 0x10B7, 0x9050, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905_1 },
        { 0x10B7, 0x9051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905_2 },
        { 0x10B7, 0x9055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905B_1 },

        { 0x10B7, 0x9058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905B_2 },
        { 0x10B7, 0x905A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905B_FX },
        { 0x10B7, 0x9200, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C905C },
        { 0x10B7, 0x9800, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C980 },
        { 0x10B7, 0x9805, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C9805 },

        { 0x10B7, 0x7646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CSOHO100_TX },
        { 0x10B7, 0x5055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C555 },
        { 0x10B7, 0x6055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C556 },
        { 0x10B7, 0x6056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C556B },
        { 0x10B7, 0x5b57, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C575 },

        { 0x10B7, 0x5057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C575_1 },
        { 0x10B7, 0x5157, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFE575 },
        { 0x10B7, 0x5257, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFE575CT },
        { 0x10B7, 0x6560, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFE656 },
        { 0x10B7, 0x6562, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFEM656 },

        { 0x10B7, 0x6564, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3CCFEM656_1 },
        { 0x10B7, 0x4500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_3C450 },
        {0,}                                            /* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, vortex_pci_tbl);


/* Operational definitions.
   These are not used by other compilation units and thus are not
   exported in a ".h" file.

   First the windows.  There are eight register windows, with the command
   and status registers available in each.
   */
#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
#define EL3_CMD 0x0e
#define EL3_STATUS 0x0e

/* The top five bits written to EL3_CMD are a command, the lower
   11 bits are the parameter, if applicable.
   Note that 11 parameters bits was fine for ethernet, but the new chip
   can handle FDDI length frames (~4500 octets) and now parameters count
   32-bit 'Dwords' rather than octets. */

enum vortex_cmd {
        TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
        RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11,
        UpStall = 6<<11, UpUnstall = (6<<11)+1,
        DownStall = (6<<11)+2, DownUnstall = (6<<11)+3,
        RxDiscard = 8<<11, TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
        FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
        SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
        SetTxThreshold = 18<<11, SetTxStart = 19<<11,
        StartDMAUp = 20<<11, StartDMADown = (20<<11)+1, StatsEnable = 21<<11,
        StatsDisable = 22<<11, StopCoax = 23<<11, SetFilterBit = 25<<11,};

/* The SetRxFilter command accepts the following classes: */
enum RxFilter {
        RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 };

/* Bits in the general status register. */
enum vortex_status {
        IntLatch = 0x0001, HostError = 0x0002, TxComplete = 0x0004,
        TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
        IntReq = 0x0040, StatsFull = 0x0080,
        DMADone = 1<<8, DownComplete = 1<<9, UpComplete = 1<<10,
        DMAInProgress = 1<<11,                  /* DMA controller is still busy.*/
        CmdInProgress = 1<<12,                  /* EL3_CMD is still busy.*/
};

/* Register window 1 offsets, the window used in normal operation.
   On the Vortex this window is always mapped at offsets 0x10-0x1f. */
enum Window1 {
        TX_FIFO = 0x10,  RX_FIFO = 0x10,  RxErrors = 0x14,
        RxStatus = 0x18,  Timer=0x1A, TxStatus = 0x1B,
        TxFree = 0x1C, /* Remaining free bytes in Tx buffer. */
};
enum Window0 {
        Wn0EepromCmd = 10,              /* Window 0: EEPROM command register. */
        Wn0EepromData = 12,             /* Window 0: EEPROM results register. */
        IntrStatus=0x0E,                /* Valid in all windows. */
};
enum Win0_EEPROM_bits {
        EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0,
        EEPROM_EWENB = 0x30,            /* Enable erasing/writing for 10 msec. */
        EEPROM_EWDIS = 0x00,            /* Disable EWENB before 10 msec timeout. */
};
/* EEPROM locations. */
enum eeprom_offset {
        PhysAddr01=0, PhysAddr23=1, PhysAddr45=2, ModelID=3,
        EtherLink3ID=7, IFXcvrIO=8, IRQLine=9,
        NodeAddr01=10, NodeAddr23=11, NodeAddr45=12,
        DriverTune=13, Checksum=15};

enum Window2 {                  /* Window 2. */
        Wn2_ResetOptions=12,
};
enum Window3 {                  /* Window 3: MAC/config bits. */
        Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8,
};

#define BFEXT(value, offset, bitcount)  \
    ((((unsigned long)(value)) >> (offset)) & ((1 << (bitcount)) - 1))

#define BFINS(lhs, rhs, offset, bitcount)                                       \
        (((lhs) & ~((((1 << (bitcount)) - 1)) << (offset))) |   \
        (((rhs) & ((1 << (bitcount)) - 1)) << (offset)))

#define RAM_SIZE(v)             BFEXT(v, 0, 3)
#define RAM_WIDTH(v)    BFEXT(v, 3, 1)
#define RAM_SPEED(v)    BFEXT(v, 4, 2)
#define ROM_SIZE(v)             BFEXT(v, 6, 2)
#define RAM_SPLIT(v)    BFEXT(v, 16, 2)
#define XCVR(v)                 BFEXT(v, 20, 4)
#define AUTOSELECT(v)   BFEXT(v, 24, 1)

enum Window4 {          /* Window 4: Xcvr/media bits. */
        Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10,
};
enum Win4_Media_bits {
        Media_SQE = 0x0008,             /* Enable SQE error counting for AUI. */
        Media_10TP = 0x00C0,    /* Enable link beat and jabber for 10baseT. */
        Media_Lnk = 0x0080,             /* Enable just link beat for 100TX/100FX. */
        Media_LnkBeat = 0x0800,
};
enum Window7 {                                  /* Window 7: Bus Master control. */
        Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12,
};
/* Boomerang bus master control registers. */
enum MasterCtrl {
        PktStatus = 0x20, DownListPtr = 0x24, FragAddr = 0x28, FragLen = 0x2c,
        TxFreeThreshold = 0x2f, UpPktStatus = 0x30, UpListPtr = 0x38,
};

/* The Rx and Tx descriptor lists.
   Caution Alpha hackers: these types are 32 bits!  Note also the 8 byte
   alignment contraint on tx_ring[] and rx_ring[]. */
#define LAST_FRAG       0x80000000                      /* Last Addr/Len pair in descriptor. */
#define DN_COMPLETE     0x00010000                      /* This packet has been downloaded */
struct boom_rx_desc {
        u32 next;                                       /* Last entry points to 0.   */
        s32 status;
        u32 addr;                                       /* Up to 63 addr/len pairs possible. */
        s32 length;                                     /* Set LAST_FRAG to indicate last pair. */
};
/* Values for the Rx status entry. */
enum rx_desc_status {
        RxDComplete=0x00008000, RxDError=0x4000,
        /* See boomerang_rx() for actual error bits */
        IPChksumErr=1<<25, TCPChksumErr=1<<26, UDPChksumErr=1<<27,
        IPChksumValid=1<<29, TCPChksumValid=1<<30, UDPChksumValid=1<<31,
};

struct boom_tx_desc {
        u32 next;                                       /* Last entry points to 0.   */
        s32 status;                                     /* bits 0:12 length, others see below.  */
        u32 addr;
        s32 length;
};

/* Values for the Tx status entry. */
enum tx_desc_status {
        CRCDisable=0x2000, TxDComplete=0x8000,
        AddIPChksum=0x02000000, AddTCPChksum=0x04000000, AddUDPChksum=0x08000000,
        TxIntrUploaded=0x80000000,              /* IRQ when in FIFO, but maybe not sent. */
};

/* Chip features we care about in vp->capabilities, read from the EEPROM. */
enum ChipCaps { CapBusMaster=0x20, CapPwrMgmt=0x2000 };

struct vortex_private {
        /* The Rx and Tx rings should be quad-word-aligned. */
        struct boom_rx_desc* rx_ring;
        struct boom_tx_desc* tx_ring;
        dma_addr_t rx_ring_dma;
        dma_addr_t tx_ring_dma;
        /* The addresses of transmit- and receive-in-place skbuffs. */
        struct sk_buff* rx_skbuff[RX_RING_SIZE];
        struct sk_buff* tx_skbuff[TX_RING_SIZE];
        struct net_device *next_module;         /* NULL if PCI device */
        unsigned int cur_rx, cur_tx;            /* The next free ring entry */
        unsigned int dirty_rx, dirty_tx;        /* The ring entries to be free()ed. */
        struct net_device_stats stats;
        struct sk_buff *tx_skb;                         /* Packet being eaten by bus master ctrl.  */
        dma_addr_t tx_skb_dma;                          /* Allocated DMA address for bus master ctrl DMA.   */

        /* PCI configuration space information. */
        struct pci_dev *pdev;
        char *cb_fn_base;                                       /* CardBus function status addr space. */

        /* The remainder are related to chip state, mostly media selection. */
        struct timer_list timer;                        /* Media selection timer. */
        struct timer_list rx_oom_timer;         /* Rx skb allocation retry timer */
        int options;                                            /* User-settable misc. driver options. */
        unsigned int media_override:4,          /* Passed-in media type. */
                default_media:4,                                /* Read from the EEPROM/Wn3_Config. */
                full_duplex:1, force_fd:1, autoselect:1,
                bus_master:1,                                   /* Vortex can only do a fragment bus-m. */
                full_bus_master_tx:1, full_bus_master_rx:2, /* Boomerang  */
                flow_ctrl:1,                                    /* Use 802.3x flow control (PAUSE only) */
                partner_flow_ctrl:1,                    /* Partner supports flow control */
                tx_full:1,
                has_nway:1,
                open:1,
                must_free_region:1;                             /* Flag: if zero, Cardbus owns the I/O region */
        int drv_flags;
        u16 status_enable;
        u16 intr_enable;
        u16 available_media;                            /* From Wn3_Options. */
        u16 capabilities, info1, info2;         /* Various, from EEPROM. */
        u16 advertising;                                        /* NWay media advertisement */
        unsigned char phys[2];                          /* MII device addresses. */
        u16 deferred;                                           /* Resend these interrupts when we
                                                                                 * bale from the ISR */
        u16 io_size;                                            /* Size of PCI region (for release_region) */
        spinlock_t lock;                                        /* Serialise access to device & its vortex_private */
        spinlock_t mdio_lock;                           /* Serialise access to mdio hardware */
};

/* The action to take with a media selection timer tick.
   Note that we deviate from the 3Com order by checking 10base2 before AUI.
 */
enum xcvr_types {
        XCVR_10baseT=0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx,
        XCVR_100baseFx, XCVR_MII=6, XCVR_NWAY=8, XCVR_ExtMII=9, XCVR_Default=10,
};

static struct media_table {
        char *name;
        unsigned int media_bits:16,             /* Bits to set in Wn4_Media register. */
                mask:8,                                         /* The transceiver-present bit in Wn3_Config.*/
                next:8;                                         /* The media type to try next. */
        int wait;                                               /* Time before we check media status. */
} media_tbl[] = {
  {     "10baseT",   Media_10TP,0x08, XCVR_10base2, (14*HZ)/10},
  { "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1*HZ)/10},
  { "undefined", 0,                     0x80, XCVR_10baseT, 10000},
  { "10base2",   0,                     0x10, XCVR_AUI,         (1*HZ)/10},
  { "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14*HZ)/10},
  { "100baseFX", Media_Lnk, 0x04, XCVR_MII,             (14*HZ)/10},
  { "MII",               0,                     0x41, XCVR_10baseT, 3*HZ },
  { "undefined", 0,                     0x01, XCVR_10baseT, 10000},
  { "Autonegotiate", 0,         0x41, XCVR_10baseT, 3*HZ},
  { "MII-External",      0,             0x41, XCVR_10baseT, 3*HZ },
  { "Default",   0,                     0xFF, XCVR_10baseT, 10000},
};

static int vortex_probe1(struct pci_dev *pdev, long ioaddr, int irq,
                                   int chip_idx, int card_idx);
static void vortex_up(struct net_device *dev);
static void vortex_down(struct net_device *dev);
static int vortex_open(struct net_device *dev);
static void mdio_sync(long ioaddr, int bits);
static int mdio_read(struct net_device *dev, int phy_id, int location);
static void mdio_write(struct net_device *vp, int phy_id, int location, int value);
static void vortex_timer(unsigned long arg);
static void rx_oom_timer(unsigned long arg);
static int vortex_start_xmit(struct sk_buff *skb, struct net_device *dev);
static int boomerang_start_xmit(struct sk_buff *skb, struct net_device *dev);
static int vortex_rx(struct net_device *dev);
static int boomerang_rx(struct net_device *dev);
static void vortex_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static void boomerang_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static int vortex_close(struct net_device *dev);
static void dump_tx_ring(struct net_device *dev);
static void update_stats(long ioaddr, struct net_device *dev);
static struct net_device_stats *vortex_get_stats(struct net_device *dev);
static void set_rx_mode(struct net_device *dev);
static int vortex_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static void vortex_tx_timeout(struct net_device *dev);
static void acpi_set_WOL(struct net_device *dev);
\f
/* This driver uses 'options' to pass the media type, full-duplex flag, etc. */
/* Option count limit only -- unlimited interfaces are supported. */
#define MAX_UNITS 8
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};
static int flow_ctrl[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};

/* #define dev_alloc_skb dev_alloc_skb_debug */

/* A list of all installed Vortex EISA devices, for removing the driver module. */
static struct net_device *root_vortex_eisa_dev;

/* Variables to work-around the Compaq PCI BIOS32 problem. */
static int compaq_ioaddr, compaq_irq, compaq_device_id = 0x5900;

static int vortex_cards_found;

static void vortex_suspend (struct pci_dev *pdev)
{
        struct net_device *dev = pdev->driver_data;

        printk(KERN_DEBUG "vortex_suspend(%s)\n", dev->name);

        if (dev && dev->priv) {
                struct vortex_private *vp = (struct vortex_private *)dev->priv;
                if (vp->open) {
                        netif_device_detach(dev);
                        vortex_down(dev);
                }
        }
}

static void vortex_resume (struct pci_dev *pdev)
{
        struct net_device *dev = pdev->driver_data;

        printk(KERN_DEBUG "vortex_resume(%s)\n", dev->name);

        if (dev && dev->priv) {
                struct vortex_private *vp = (struct vortex_private *)dev->priv;
                if (vp->open) {
                        vortex_up(dev);
                        netif_device_attach(dev);
                }
        }
}

/* returns count found (>= 0), or negative on error */
static int __init vortex_eisa_init (void)
{
        long ioaddr;
        int rc;
        int orig_cards_found = vortex_cards_found;

        /* Now check all slots of the EISA bus. */
        if (!EISA_bus)
                return 0;

        for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
                int device_id;

                if (request_region(ioaddr, VORTEX_TOTAL_SIZE, "3c59x") == NULL)
                        continue;

                /* Check the standard EISA ID register for an encoded '3Com'. */
                if (inw(ioaddr + 0xC80) != 0x6d50) {
                        release_region (ioaddr, VORTEX_TOTAL_SIZE);
                        continue;
                }

                /* Check for a product that we support, 3c59{2,7} any rev. */
                device_id = (inb(ioaddr + 0xC82)<<8) + inb(ioaddr + 0xC83);
                if ((device_id & 0xFF00) != 0x5900) {
                        release_region (ioaddr, VORTEX_TOTAL_SIZE);
                        continue;
                }

                rc = vortex_probe1(NULL, ioaddr, inw(ioaddr + 0xC88) >> 12,
                                   EISA_TBL_OFFSET,
                                   vortex_cards_found);
                if (rc == 0)
                        vortex_cards_found++;
                else
                        release_region (ioaddr, VORTEX_TOTAL_SIZE);
        }

        /* Special code to work-around the Compaq PCI BIOS32 problem. */
        if (compaq_ioaddr) {
                vortex_probe1(NULL, compaq_ioaddr, compaq_irq,
                                          compaq_device_id, vortex_cards_found++);
        }

        return vortex_cards_found - orig_cards_found;
}

/* returns count (>= 0), or negative on error */
static int __devinit vortex_init_one (struct pci_dev *pdev,
                                      const struct pci_device_id *ent)
{
        int rc;

        rc = vortex_probe1 (pdev, pci_resource_start (pdev, 0), pdev->irq,
                            ent->driver_data, vortex_cards_found);
        if (rc == 0)
                vortex_cards_found++;
        return rc;
}

/*
 * Start up the PCI device which is described by *pdev.
 * Return 0 on success.
 *
 * NOTE: pdev can be NULL, for the case of an EISA driver
 */
static int __devinit vortex_probe1(struct pci_dev *pdev,
                                   long ioaddr, int irq,
                                   int chip_idx, int card_idx)
{
        struct vortex_private *vp;
        int option;
        unsigned int eeprom[0x40], checksum = 0;                /* EEPROM contents */
        int i;
        struct net_device *dev;
        static int printed_version;
        int retval;
        struct vortex_chip_info * const vci = &vortex_info_tbl[chip_idx];

        if (!printed_version) {
                printk (KERN_INFO "%s", version);
                printk (KERN_INFO "See Documentation/networking/vortex.txt\n");
                printed_version = 1;
        }

        dev = init_etherdev(NULL, sizeof(*vp));
        if (!dev) {
                printk (KERN_ERR PFX "unable to allocate etherdev, aborting\n");
                retval = -ENOMEM;
                goto out;
        }
        SET_MODULE_OWNER(dev);

        printk(KERN_INFO "%s: 3Com %s %s at 0x%lx, ",
               dev->name,
               pdev ? "PCI" : "EISA",
               vci->name,
               ioaddr);

        /* private struct aligned and zeroed by init_etherdev */
        vp = dev->priv;
        dev->base_addr = ioaddr;
        dev->irq = irq;
        dev->mtu = mtu;
        vp->drv_flags = vci->drv_flags;
        vp->has_nway = (vci->drv_flags & HAS_NWAY) ? 1 : 0;
        vp->io_size = vci->io_size;

        /* module list only for EISA devices */
        if (pdev == NULL) {
                vp->next_module = root_vortex_eisa_dev;
                root_vortex_eisa_dev = dev;
        }

        /* PCI-only startup logic */
        if (pdev) {
                /* EISA resources already marked, so only PCI needs to do this here */
                /* Ignore return value, because Cardbus drivers already allocate for us */
                if (request_region(ioaddr, vci->io_size, dev->name) != NULL) {
                        vp->must_free_region = 1;
                }

                /* wake up and enable device */         
                if (pci_enable_device (pdev)) {
                        retval = -EIO;
                        goto free_region;
                }

                /* enable bus-mastering if necessary */         
                if (vci->flags & PCI_USES_MASTER)
                        pci_set_master (pdev);
        }

        spin_lock_init(&vp->lock);
        spin_lock_init(&vp->mdio_lock);
        vp->pdev = pdev;

        /* Makes sure rings are at least 16 byte aligned. */
        vp->rx_ring = pci_alloc_consistent(pdev, sizeof(struct boom_rx_desc) * RX_RING_SIZE
                                           + sizeof(struct boom_tx_desc) * TX_RING_SIZE,
                                           &vp->rx_ring_dma);
        if (vp->rx_ring == 0) {
                retval = -ENOMEM;
                goto free_region;
        }

        vp->tx_ring = (struct boom_tx_desc *)(vp->rx_ring + RX_RING_SIZE);
        vp->tx_ring_dma = vp->rx_ring_dma + sizeof(struct boom_rx_desc) * RX_RING_SIZE;

        /* if we are a PCI driver, we store info in pdev->driver_data
         * instead of a module list */  
        if (pdev)
                pdev->driver_data = dev;

        /* The lower four bits are the media type. */
        if (dev->mem_start) {
                /*
                 * AKPM: ewww..  The 'options' param is passed in as the third arg to the
                 * LILO 'ether=' argument for non-modular use
                 */
                option = dev->mem_start;
        }
        else if (card_idx < MAX_UNITS)
                option = options[card_idx];
        else
                option = -1;

        vp->media_override = 7;
        if (option >= 0) {
                vp->media_override = ((option & 7) == 2)  ?  0  :  option & 15;
                vp->full_duplex = (option & 0x200) ? 1 : 0;
                vp->bus_master = (option & 16) ? 1 : 0;
        }

        if (card_idx < MAX_UNITS) {
                if (full_duplex[card_idx] > 0)
                        vp->full_duplex = 1;
                if (flow_ctrl[card_idx] > 0)
                        vp->flow_ctrl = 1;
        }

        vp->force_fd = vp->full_duplex;
        vp->options = option;
        /* Read the station address from the EEPROM. */
        EL3WINDOW(0);
        {
                int base;

                if (vci->drv_flags & EEPROM_8BIT)
                        base = 0x230;
                else if (vci->drv_flags & EEPROM_OFFSET)
                        base = EEPROM_Read + 0x30;
                else
                        base = EEPROM_Read;

                for (i = 0; i < 0x40; i++) {
                        int timer;
                        outw(base + i, ioaddr + Wn0EepromCmd);
                        /* Pause for at least 162 us. for the read to take place. */
                        for (timer = 10; timer >= 0; timer--) {
                                udelay(162);
                                if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0)
                                        break;
                        }
                        eeprom[i] = inw(ioaddr + Wn0EepromData);
                }
        }
        for (i = 0; i < 0x18; i++)
                checksum ^= eeprom[i];
        checksum = (checksum ^ (checksum >> 8)) & 0xff;
        if (checksum != 0x00) {         /* Grrr, needless incompatible change 3Com. */
                while (i < 0x21)
                        checksum ^= eeprom[i++];
                checksum = (checksum ^ (checksum >> 8)) & 0xff;
        }
        if ((checksum != 0x00) && !(vci->drv_flags & IS_TORNADO))
                printk(" ***INVALID CHECKSUM %4.4x*** ", checksum);
        for (i = 0; i < 3; i++)
                ((u16 *)dev->dev_addr)[i] = htons(eeprom[i + 10]);
        for (i = 0; i < 6; i++)
                printk("%c%2.2x", i ? ':' : ' ', dev->dev_addr[i]);
        EL3WINDOW(2);
        for (i = 0; i < 6; i++)
                outb(dev->dev_addr[i], ioaddr + i);

#ifdef __sparc__
        printk(", IRQ %s\n", __irq_itoa(dev->irq));
#else
        printk(", IRQ %d\n", dev->irq);
        /* Tell them about an invalid IRQ. */
        if (vortex_debug && (dev->irq <= 0 || dev->irq >= NR_IRQS))
                printk(KERN_WARNING " *** Warning: IRQ %d is unlikely to work! ***\n",
                           dev->irq);
#endif

        if (pdev && vci->drv_flags & HAS_CB_FNS) {
                unsigned long fn_st_addr;                       /* Cardbus function status space */
                unsigned short n;

                fn_st_addr = pci_resource_start (pdev, 2);
                if (fn_st_addr)
                        vp->cb_fn_base = ioremap(fn_st_addr, 128);
                printk(KERN_INFO "%s: CardBus functions mapped %8.8lx->%p\n",
                           dev->name, fn_st_addr, vp->cb_fn_base);
                EL3WINDOW(2);

                n = inw(ioaddr + Wn2_ResetOptions) & ~0x4010;
                if (vp->drv_flags & INVERT_LED_PWR)
                        n |= 0x10;
                if (vp->drv_flags & INVERT_MII_PWR)
                        n |= 0x4000;
                outw(n, ioaddr + Wn2_ResetOptions);
        }

        /* Extract our information from the EEPROM data. */
        vp->info1 = eeprom[13];
        vp->info2 = eeprom[15];
        vp->capabilities = eeprom[16];

        if (vp->info1 & 0x8000) {
                vp->full_duplex = 1;
                printk(KERN_INFO "Full duplex capable\n");
        }

        {
                static const char * ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
                unsigned int config;
                EL3WINDOW(3);
                vp->available_media = inw(ioaddr + Wn3_Options);
                if ((vp->available_media & 0xff) == 0)          /* Broken 3c916 */
                        vp->available_media = 0x40;
                config = inl(ioaddr + Wn3_Config);
                if (vortex_debug > 1)
                        printk(KERN_DEBUG "  Internal config register is %4.4x, "
                                   "transceivers %#x.\n", config, inw(ioaddr + Wn3_Options));
                printk(KERN_INFO "  %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
                           8 << RAM_SIZE(config),
                           RAM_WIDTH(config) ? "word" : "byte",
                           ram_split[RAM_SPLIT(config)],
                           AUTOSELECT(config) ? "autoselect/" : "",
                           XCVR(config) > XCVR_ExtMII ? "<invalid transceiver>" :
                           media_tbl[XCVR(config)].name);
                vp->default_media = XCVR(config);
                vp->autoselect = AUTOSELECT(config);
        }

        if (vp->media_override != 7) {
                printk(KERN_INFO "  Media override to transceiver type %d (%s).\n",
                           vp->media_override, media_tbl[vp->media_override].name);
                dev->if_port = vp->media_override;
        } else
                dev->if_port = vp->default_media;

        if (dev->if_port == XCVR_MII || dev->if_port == XCVR_NWAY) {
                int phy, phy_idx = 0;
                EL3WINDOW(4);
                mii_preamble_required++;
                mii_preamble_required++;
                mdio_read(dev, 24, 1);
                for (phy = 1; phy <= 32 && phy_idx < sizeof(vp->phys); phy++) {
                        int mii_status, phyx = phy & 0x1f;
                        mii_status = mdio_read(dev, phyx, 1);
                        if (mii_status  &&  mii_status != 0xffff) {
                                vp->phys[phy_idx++] = phyx;
                                printk(KERN_INFO "  MII transceiver found at address %d,"
                                           " status %4x.\n", phyx, mii_status);
                                if ((mii_status & 0x0040) == 0)
                                        mii_preamble_required++;
                        }
                }
                mii_preamble_required--;
                if (phy_idx == 0) {
                        printk(KERN_WARNING"  ***WARNING*** No MII transceivers found!\n");
                        vp->phys[0] = 24;
                } else {
                        vp->advertising = mdio_read(dev, vp->phys[0], 4);
                        if (vp->full_duplex) {
                                /* Only advertise the FD media types. */
                                vp->advertising &= ~0x02A0;
                                mdio_write(dev, vp->phys[0], 4, vp->advertising);
                        }
                }
        }

        if (vp->capabilities & CapPwrMgmt)
                acpi_set_WOL(dev);

        if (vp->capabilities & CapBusMaster) {
                vp->full_bus_master_tx = 1;
                printk(KERN_INFO"  Enabling bus-master transmits and %s receives.\n",
                           (vp->info2 & 1) ? "early" : "whole-frame" );
                vp->full_bus_master_rx = (vp->info2 & 1) ? 1 : 2;
                vp->bus_master = 0;             /* AKPM: vortex only */
        }

        /* The 3c59x-specific entries in the device structure. */
        dev->open = vortex_open;
        dev->hard_start_xmit = vp->full_bus_master_tx ?
                                        boomerang_start_xmit : vortex_start_xmit;
        dev->stop = vortex_close;
        dev->get_stats = vortex_get_stats;
        dev->do_ioctl = vortex_ioctl;
        dev->set_multicast_list = set_rx_mode;
        dev->tx_timeout = vortex_tx_timeout;
        dev->watchdog_timeo = (watchdog * HZ) / 1000;

        return 0;

free_region:
        if (vp->must_free_region)
                release_region(ioaddr, vci->io_size);
        unregister_netdev(dev);
        kfree (dev);
        printk(KERN_ERR PFX "vortex_probe1 fails.  Returns %d\n", retval);
out:
        return retval;
}

static void wait_for_completion(struct net_device *dev, int cmd)
{
        int i = 4000;

        outw(cmd, dev->base_addr + EL3_CMD);
        while (--i > 0) {
                if (!(inw(dev->base_addr + EL3_STATUS) & CmdInProgress))
                        return;
        }
        printk(KERN_ERR "%s: command 0x%04x did not complete! Status=0x%x\n",
                           dev->name, cmd, inw(dev->base_addr + EL3_STATUS));
}

static void
vortex_up(struct net_device *dev)
{
        long ioaddr = dev->base_addr;
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        unsigned int config;
        int i, device_id;

        if (vp->pdev)
                device_id = vp->pdev->device;
        else
                device_id = 0x5900; /* EISA */
        
        /* Before initializing select the active media port. */
        EL3WINDOW(3);
        config = inl(ioaddr + Wn3_Config);

        if (vp->media_override != 7) {
                if (vortex_debug > 1)
                        printk(KERN_INFO "%s: Media override to transceiver %d (%s).\n",
                                   dev->name, vp->media_override,
                                   media_tbl[vp->media_override].name);
                dev->if_port = vp->media_override;
        } else if (vp->autoselect) {
                if (vp->has_nway) {
                        printk(KERN_INFO "%s: using NWAY autonegotiation\n", dev->name);
                        dev->if_port = XCVR_NWAY;
                } else {
                        /* Find first available media type, starting with 100baseTx. */
                        dev->if_port = XCVR_100baseTx;
                        while (! (vp->available_media & media_tbl[dev->if_port].mask))
                                dev->if_port = media_tbl[dev->if_port].next;
                        printk(KERN_INFO "%s: first available media type: %s\n",
                                        dev->name,
                                        media_tbl[dev->if_port].name);
                }
        } else {
                dev->if_port = vp->default_media;
                printk(KERN_INFO "%s: using default media %s\n",
                                dev->name, media_tbl[dev->if_port].name);
        }

        init_timer(&vp->timer);
        vp->timer.expires = RUN_AT(media_tbl[dev->if_port].wait);
        vp->timer.data = (unsigned long)dev;
        vp->timer.function = vortex_timer;              /* timer handler */
        add_timer(&vp->timer);

        init_timer(&vp->rx_oom_timer);
        vp->rx_oom_timer.data = (unsigned long)dev;
        vp->rx_oom_timer.function = rx_oom_timer;

        if (vortex_debug > 1)
                printk(KERN_DEBUG "%s: Initial media type %s.\n",
                           dev->name, media_tbl[dev->if_port].name);

        vp->full_duplex = vp->force_fd;
        config = BFINS(config, dev->if_port, 20, 4);
//AKPM  if (!vp->has_nway)
        {
                if (vortex_debug > 6)
                        printk(KERN_DEBUG "vortex_up(): writing 0x%x to InternalConfig\n",
                                config);
                outl(config, ioaddr + Wn3_Config);
        }

        if (dev->if_port == XCVR_MII || dev->if_port == XCVR_NWAY) {
                int mii_reg1, mii_reg5;
                EL3WINDOW(4);
                /* Read BMSR (reg1) only to clear old status. */
                mii_reg1 = mdio_read(dev, vp->phys[0], 1);
                mii_reg5 = mdio_read(dev, vp->phys[0], 5);
                if (mii_reg5 == 0xffff  ||  mii_reg5 == 0x0000)
                        ;                                       /* No MII device or no link partner report */
                else if ((mii_reg5 & 0x0100) != 0       /* 100baseTx-FD */
                                 || (mii_reg5 & 0x00C0) == 0x0040) /* 10T-FD, but not 100-HD */
                        vp->full_duplex = 1;
                vp->partner_flow_ctrl = ((mii_reg5 & 0x0400) != 0);
                if (vortex_debug > 1)
                        printk(KERN_INFO "%s: MII #%d status %4.4x, link partner capability %4.4x,"
                                   " setting %s-duplex.\n", dev->name, vp->phys[0],
                                   mii_reg1, mii_reg5, vp->full_duplex ? "full" : "half");
                EL3WINDOW(3);
        }

        /* Set the full-duplex bit. */
        outw(   ((vp->info1 & 0x8000) || vp->full_duplex ? 0x20 : 0) |
                        (dev->mtu > 1500 ? 0x40 : 0) |
                        ((vp->full_duplex && vp->flow_ctrl && vp->partner_flow_ctrl) ? 0x100 : 0),
                        ioaddr + Wn3_MAC_Ctrl);

        if (vortex_debug > 1) {
                printk(KERN_DEBUG "%s: vortex_up() InternalConfig %8.8x.\n",
                        dev->name, config);
        }

        wait_for_completion(dev, TxReset);
        wait_for_completion(dev, RxReset);

        outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);

        if (vortex_debug > 1) {
                EL3WINDOW(4);
                printk(KERN_DEBUG "%s: vortex_up() irq %d media status %4.4x.\n",
                           dev->name, dev->irq, inw(ioaddr + Wn4_Media));
        }

        /* Set the station address and mask in window 2 each time opened. */
        EL3WINDOW(2);
        for (i = 0; i < 6; i++)
                outb(dev->dev_addr[i], ioaddr + i);
        for (; i < 12; i+=2)
                outw(0, ioaddr + i);

        if (vp->cb_fn_base) {
                unsigned short n = inw(ioaddr + Wn2_ResetOptions) & ~0x4010;
                if (vp->drv_flags & INVERT_LED_PWR)
                        n |= 0x10;
                if (vp->drv_flags & INVERT_MII_PWR)
                        n |= 0x4000;
                outw(n, ioaddr + Wn2_ResetOptions);
        }

        if (dev->if_port == XCVR_10base2)
                /* Start the thinnet transceiver. We should really wait 50ms...*/
                outw(StartCoax, ioaddr + EL3_CMD);
        if (dev->if_port != XCVR_NWAY) {
                EL3WINDOW(4);
                outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP|Media_SQE)) |
                         media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
        }

        /* Switch to the stats window, and clear all stats by reading. */
        outw(StatsDisable, ioaddr + EL3_CMD);
        EL3WINDOW(6);
        for (i = 0; i < 10; i++)
                inb(ioaddr + i);
        inw(ioaddr + 10);
        inw(ioaddr + 12);
        /* New: On the Vortex we must also clear the BadSSD counter. */
        EL3WINDOW(4);
        inb(ioaddr + 12);
        /* ..and on the Boomerang we enable the extra statistics bits. */
        outw(0x0040, ioaddr + Wn4_NetDiag);

        /* Switch to register set 7 for normal use. */
        EL3WINDOW(7);

        if (vp->full_bus_master_rx) { /* Boomerang bus master. */
                vp->cur_rx = vp->dirty_rx = 0;
                /* Initialize the RxEarly register as recommended. */
                outw(SetRxThreshold + (1536>>2), ioaddr + EL3_CMD);
                outl(0x0020, ioaddr + PktStatus);
                outl(vp->rx_ring_dma, ioaddr + UpListPtr);
        }
        if (vp->full_bus_master_tx) {           /* Boomerang bus master Tx. */
                vp->cur_tx = vp->dirty_tx = 0;
                if (vp->drv_flags & IS_BOOMERANG)
                        outb(PKT_BUF_SZ>>8, ioaddr + TxFreeThreshold); /* Room for a packet. */
                /* Clear the Rx, Tx rings. */
                for (i = 0; i < RX_RING_SIZE; i++)      /* AKPM: this is done in vortex_open, too */
                        vp->rx_ring[i].status = 0;
                for (i = 0; i < TX_RING_SIZE; i++)
                        vp->tx_skbuff[i] = 0;
                outl(0, ioaddr + DownListPtr);
        }
        /* Set receiver mode: presumably accept b-case and phys addr only. */
        set_rx_mode(dev);
        outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */

        outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
        outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
        /* Allow status bits to be seen. */
        vp->status_enable = SetStatusEnb | HostError|IntReq|StatsFull|TxComplete|
                (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
                (vp->full_bus_master_rx ? UpComplete : RxComplete) |
                (vp->bus_master ? DMADone : 0);
        vp->intr_enable = SetIntrEnb | IntLatch | TxAvailable |
                (vp->full_bus_master_rx ? 0 : RxComplete) |
                StatsFull | HostError | TxComplete | IntReq
                | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete;
        outw(vp->status_enable, ioaddr + EL3_CMD);
        /* Ack all pending events, and set active indicator mask. */
        outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
                 ioaddr + EL3_CMD);
        outw(vp->intr_enable, ioaddr + EL3_CMD);
        if (vp->cb_fn_base)                     /* The PCMCIA people are idiots.  */
                writel(0x8000, vp->cb_fn_base + 4);
        netif_start_queue (dev);
}

static int
vortex_open(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        int i;
        int retval;

        /* Use the now-standard shared IRQ implementation. */
        if ((retval = request_irq(dev->irq, vp->full_bus_master_rx ?
                                &boomerang_interrupt : &vortex_interrupt, SA_SHIRQ, dev->name, dev))) {
                printk(KERN_ERR "%s: Could not reserve IRQ %d\n", dev->name, dev->irq);
                goto out;
        }

        if (vp->full_bus_master_rx) { /* Boomerang bus master. */
                if (vortex_debug > 2)
                        printk(KERN_DEBUG "%s:  Filling in the Rx ring.\n", dev->name);
                for (i = 0; i < RX_RING_SIZE; i++) {
                        struct sk_buff *skb;
                        vp->rx_ring[i].next = cpu_to_le32(vp->rx_ring_dma + sizeof(struct boom_rx_desc) * (i+1));
                        vp->rx_ring[i].status = 0;      /* Clear complete bit. */
                        vp->rx_ring[i].length = cpu_to_le32(PKT_BUF_SZ | LAST_FRAG);
                        skb = dev_alloc_skb(PKT_BUF_SZ);
                        vp->rx_skbuff[i] = skb;
                        if (skb == NULL)
                                break;                  /* Bad news!  */
                        skb->dev = dev;                 /* Mark as being used by this device. */
                        skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
                        vp->rx_ring[i].addr = cpu_to_le32(pci_map_single(vp->pdev, skb->tail, PKT_BUF_SZ, PCI_DMA_FROMDEVICE));
                }
                if (i != RX_RING_SIZE) {
                        int j;
                        for (j = 0; j < RX_RING_SIZE; j++) {
                                if (vp->rx_skbuff[j]) {
                                        dev_kfree_skb(vp->rx_skbuff[j]);
                                        vp->rx_skbuff[j] = 0;
                                }
                        }
                        retval = -ENOMEM;
                        goto out_free_irq;
                }
                /* Wrap the ring. */
                vp->rx_ring[i-1].next = cpu_to_le32(vp->rx_ring_dma);
        }

        vortex_up(dev);
        vp->open = 1;
        vp->tx_full = 0;
        return 0;

out_free_irq:
        free_irq(dev->irq, dev);
out:
        if (vortex_debug > 1)
                printk(KERN_ERR "%s: vortex_open() fails: returning %d\n", dev->name, retval);
        return retval;
}

static void vortex_timer(unsigned long data)
{
        struct net_device *dev = (struct net_device *)data;
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;
        int next_tick = 60*HZ;
        int ok = 0;
        int media_status, mii_status, old_window;

        if (vortex_debug > 2) {
                printk(KERN_DEBUG "%s: Media selection timer tick happened, %s.\n",
                           dev->name, media_tbl[dev->if_port].name);
                printk(KERN_DEBUG "dev->watchdog_timeo=%d\n", dev->watchdog_timeo);
        }

        disable_irq(dev->irq);
        old_window = inw(ioaddr + EL3_CMD) >> 13;
        EL3WINDOW(4);
        media_status = inw(ioaddr + Wn4_Media);
        switch (dev->if_port) {
        case XCVR_10baseT:  case XCVR_100baseTx:  case XCVR_100baseFx:
                if (media_status & Media_LnkBeat) {
                        ok = 1;
                        if (vortex_debug > 1)
                                printk(KERN_DEBUG "%s: Media %s has link beat, %x.\n",
                                           dev->name, media_tbl[dev->if_port].name, media_status);
                } else if (vortex_debug > 1)
                        printk(KERN_DEBUG "%s: Media %s has no link beat, %x.\n",
                                   dev->name, media_tbl[dev->if_port].name, media_status);
                break;
        case XCVR_MII: case XCVR_NWAY:
                {
                        mii_status = mdio_read(dev, vp->phys[0], 1);
                        ok = 1;
                        if (vortex_debug > 2)
                                printk(KERN_DEBUG "%s: MII transceiver has status %4.4x.\n",
                                        dev->name, mii_status);
                        if (mii_status & 0x0004) {
                                int mii_reg5 = mdio_read(dev, vp->phys[0], 5);
                                if (! vp->force_fd  &&  mii_reg5 != 0xffff) {
                                        int duplex = (mii_reg5&0x0100) ||
                                                (mii_reg5 & 0x01C0) == 0x0040;
                                        if (vp->full_duplex != duplex) {
                                                vp->full_duplex = duplex;
                                                printk(KERN_INFO "%s: Setting %s-duplex based on MII "
                                                        "#%d link partner capability of %4.4x.\n",
                                                        dev->name, vp->full_duplex ? "full" : "half",
                                                        vp->phys[0], mii_reg5);
                                                /* Set the full-duplex bit. */
                                                EL3WINDOW(3);   /* AKPM: this was missing from 2.3.99 3c59x.c! */
                                                outw(   (vp->full_duplex ? 0x20 : 0) |
                                                                (dev->mtu > 1500 ? 0x40 : 0) |
                                                                ((vp->full_duplex && vp->flow_ctrl && vp->partner_flow_ctrl) ? 0x100 : 0),
                                                                ioaddr + Wn3_MAC_Ctrl);
                                                if (vortex_debug > 1)
                                                        printk(KERN_DEBUG "Setting duplex in Wn3_MAC_Ctrl\n");
                                                /* AKPM: bug: should reset Tx and Rx after setting Duplex.  Page 180 */
                                        }
                                }
                        }
                }
                break;
          default:                                      /* Other media types handled by Tx timeouts. */
                if (vortex_debug > 1)
                  printk(KERN_DEBUG "%s: Media %s has no indication, %x.\n",
                                 dev->name, media_tbl[dev->if_port].name, media_status);
                ok = 1;
        }
        if ( ! ok) {
                unsigned int config;

                do {
                        dev->if_port = media_tbl[dev->if_port].next;
                } while ( ! (vp->available_media & media_tbl[dev->if_port].mask));
                if (dev->if_port == XCVR_Default) { /* Go back to default. */
                  dev->if_port = vp->default_media;
                  if (vortex_debug > 1)
                        printk(KERN_DEBUG "%s: Media selection failing, using default "
                                   "%s port.\n",
                                   dev->name, media_tbl[dev->if_port].name);
                } else {
                        if (vortex_debug > 1)
                                printk(KERN_DEBUG "%s: Media selection failed, now trying "
                                           "%s port.\n",
                                           dev->name, media_tbl[dev->if_port].name);
                        next_tick = media_tbl[dev->if_port].wait;
                }
                outw((media_status & ~(Media_10TP|Media_SQE)) |
                         media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);

                EL3WINDOW(3);
                config = inl(ioaddr + Wn3_Config);
                config = BFINS(config, dev->if_port, 20, 4);
                outl(config, ioaddr + Wn3_Config);

                outw(dev->if_port == XCVR_10base2 ? StartCoax : StopCoax,
                         ioaddr + EL3_CMD);
                if (vortex_debug > 1)
                        printk(KERN_DEBUG "wrote 0x%08x to Wn3_Config\n", config);
                /* AKPM: FIXME: Should reset Rx & Tx here.  P60 of 3c90xc.pdf */
        }
        EL3WINDOW(old_window);
        enable_irq(dev->irq);

        if (vortex_debug > 2)
          printk(KERN_DEBUG "%s: Media selection timer finished, %s.\n",
                         dev->name, media_tbl[dev->if_port].name);

        mod_timer(&vp->timer, RUN_AT(next_tick));
        if (vp->deferred)
                outw(FakeIntr, ioaddr + EL3_CMD);
        return;
}

static void vortex_tx_timeout(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;

        printk(KERN_ERR "%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
                   dev->name, inb(ioaddr + TxStatus),
                   inw(ioaddr + EL3_STATUS));

        /* Slight code bloat to be user friendly. */
        if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
                printk(KERN_ERR "%s: Transmitter encountered 16 collisions --"
                           " network cable problem?\n", dev->name);
        if (inw(ioaddr + EL3_STATUS) & IntLatch) {
                printk(KERN_ERR "%s: Interrupt posted but not delivered --"
                           " IRQ blocked by another device?\n", dev->name);
                /* Bad idea here.. but we might as well handle a few events. */
                {
                        /*
                         * AKPM: block interrupts because vortex_interrupt
                         * does a bare spin_lock()
                         */
                        unsigned long flags;
                        local_irq_save(flags);
                        if (vp->full_bus_master_tx)
                                boomerang_interrupt(dev->irq, dev, 0);
                        else
                                vortex_interrupt(dev->irq, dev, 0);
                        local_irq_restore(flags);
                }
        }

        if (vortex_debug > 0)
                dump_tx_ring(dev);

        wait_for_completion(dev, TxReset);

        vp->stats.tx_errors++;
        if (vp->full_bus_master_tx) {
                if (vortex_debug > 0)
                        printk(KERN_DEBUG "%s: Resetting the Tx ring pointer.\n",
                                   dev->name);
                if (vp->cur_tx - vp->dirty_tx > 0  &&  inl(ioaddr + DownListPtr) == 0)
                        outl(vp->tx_ring_dma + (vp->dirty_tx % TX_RING_SIZE) * sizeof(struct boom_tx_desc),
                                 ioaddr + DownListPtr);
                if (vp->tx_full && (vp->cur_tx - vp->dirty_tx <= TX_RING_SIZE - 1)) {
                        vp->tx_full = 0;
                        netif_wake_queue (dev);
                }
                if (vp->tx_full)
                        netif_stop_queue (dev);
                if (vp->drv_flags & IS_BOOMERANG)
                        outb(PKT_BUF_SZ>>8, ioaddr + TxFreeThreshold);
                outw(DownUnstall, ioaddr + EL3_CMD);
        } else {
                vp->stats.tx_dropped++;
                netif_wake_queue(dev);
        }
        
        /* Issue Tx Enable */
        outw(TxEnable, ioaddr + EL3_CMD);
        dev->trans_start = jiffies;
        
        /* Switch to register set 7 for normal use. */
        EL3WINDOW(7);
}

/*
 * Handle uncommon interrupt sources.  This is a separate routine to minimize
 * the cache impact.
 */
static void
vortex_error(struct net_device *dev, int status)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;
        int do_tx_reset = 0, reset_mask = 0;
        unsigned char tx_status = 0;

        if (vortex_debug > 2) {
                printk(KERN_DEBUG "%s: vortex_error(), status=0x%x\n", dev->name, status);
        }

        if (status & TxComplete) {                      /* Really "TxError" for us. */
                tx_status = inb(ioaddr + TxStatus);
                /* Presumably a tx-timeout. We must merely re-enable. */
                if (vortex_debug > 2
                        || (tx_status != 0x88 && vortex_debug > 0)) {
                        printk(KERN_DEBUG"%s: Transmit error, Tx status register %2.2x.\n",
                                   dev->name, tx_status);
                        dump_tx_ring(dev);
                }
                if (tx_status & 0x14)  vp->stats.tx_fifo_errors++;
                if (tx_status & 0x38)  vp->stats.tx_aborted_errors++;
                outb(0, ioaddr + TxStatus);
                if (tx_status & 0x30) {                 /* txJabber or txUnderrun */
                        do_tx_reset = 1;
                } else if ((tx_status & 0x08) && (vp->drv_flags & MAX_COLLISION_RESET)) {       /* maxCollisions */
                        do_tx_reset = 1;
                        reset_mask = 0x0108;            /* Reset interface logic, but not download logic */
                } else {                                                /* Merely re-enable the transmitter. */
                        outw(TxEnable, ioaddr + EL3_CMD);
                }
        }

        if (status & RxEarly) {                         /* Rx early is unused. */
                vortex_rx(dev);
                outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
        }
        if (status & StatsFull) {                       /* Empty statistics. */
                static int DoneDidThat;
                if (vortex_debug > 4)
                        printk(KERN_DEBUG "%s: Updating stats.\n", dev->name);
                update_stats(ioaddr, dev);
                /* HACK: Disable statistics as an interrupt source. */
                /* This occurs when we have the wrong media type! */
                if (DoneDidThat == 0  &&
                        inw(ioaddr + EL3_STATUS) & StatsFull) {
                        printk(KERN_WARNING "%s: Updating statistics failed, disabling "
                                   "stats as an interrupt source.\n", dev->name);
                        EL3WINDOW(5);
                        outw(SetIntrEnb | (inw(ioaddr + 10) & ~StatsFull), ioaddr + EL3_CMD);
                        vp->intr_enable &= ~StatsFull;
                        EL3WINDOW(7);
                        DoneDidThat++;
                }
        }
        if (status & IntReq) {          /* Restore all interrupt sources.  */
                outw(vp->status_enable, ioaddr + EL3_CMD);
                outw(vp->intr_enable, ioaddr + EL3_CMD);
        }
        if (status & HostError) {
                u16 fifo_diag;
                EL3WINDOW(4);
                fifo_diag = inw(ioaddr + Wn4_FIFODiag);
                printk(KERN_ERR "%s: Host error, FIFO diagnostic register %4.4x.\n",
                           dev->name, fifo_diag);
                /* Adapter failure requires Tx/Rx reset and reinit. */
                if (vp->full_bus_master_tx) {
                        /* In this case, blow the card away */
                        vortex_down(dev);
                        wait_for_completion(dev, TotalReset | 0xff);
                        vortex_up(dev);         /* AKPM: bug.  vortex_up() assumes that the rx ring is full. It may not be. */
                } else if (fifo_diag & 0x0400)
                        do_tx_reset = 1;
                if (fifo_diag & 0x3000) {
                        wait_for_completion(dev, RxReset);
                        /* Set the Rx filter to the current state. */
                        set_rx_mode(dev);
                        outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
                        outw(AckIntr | HostError, ioaddr + EL3_CMD);
                }
        }

        if (do_tx_reset) {
                wait_for_completion(dev, TxReset|reset_mask);
                outw(TxEnable, ioaddr + EL3_CMD);
                if (!vp->full_bus_master_tx)
                        netif_wake_queue(dev);
        }
}

static int
vortex_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;

        /* Put out the doubleword header... */
        outl(skb->len, ioaddr + TX_FIFO);
        if (vp->bus_master) {
                /* Set the bus-master controller to transfer the packet. */
                int len = (skb->len + 3) & ~3;
                outl(   vp->tx_skb_dma = pci_map_single(vp->pdev, skb->data, len, PCI_DMA_TODEVICE),
                                ioaddr + Wn7_MasterAddr);
                outw(len, ioaddr + Wn7_MasterLen);
                vp->tx_skb = skb;
                outw(StartDMADown, ioaddr + EL3_CMD);
                /* netif_wake_queue() will be called at the DMADone interrupt. */
        } else {
                /* ... and the packet rounded to a doubleword. */
                outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
                dev_kfree_skb (skb);
                if (inw(ioaddr + TxFree) > 1536) {
                        netif_start_queue (dev);        /* AKPM: redundant? */
                } else {
                        /* Interrupt us when the FIFO has room for max-sized packet. */
                        netif_stop_queue(dev);
                        outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD);
                }
        }

        dev->trans_start = jiffies;

        /* Clear the Tx status stack. */
        {
                int tx_status;
                int i = 32;

                while (--i > 0  &&      (tx_status = inb(ioaddr + TxStatus)) > 0) {
                        if (tx_status & 0x3C) {         /* A Tx-disabling error occurred.  */
                                if (vortex_debug > 2)
                                  printk(KERN_DEBUG "%s: Tx error, status %2.2x.\n",
                                                 dev->name, tx_status);
                                if (tx_status & 0x04) vp->stats.tx_fifo_errors++;
                                if (tx_status & 0x38) vp->stats.tx_aborted_errors++;
                                if (tx_status & 0x30) {
                                        wait_for_completion(dev, TxReset);
                                }
                                outw(TxEnable, ioaddr + EL3_CMD);
                        }
                        outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
                }
        }
        return 0;
}

static int
boomerang_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;
        /* Calculate the next Tx descriptor entry. */
        int entry = vp->cur_tx % TX_RING_SIZE;
        struct boom_tx_desc *prev_entry = &vp->tx_ring[(vp->cur_tx-1) % TX_RING_SIZE];
        unsigned long flags;

        if (vortex_debug > 6) {
                printk(KERN_DEBUG "boomerang_start_xmit()\n");
                if (vortex_debug > 3)
                        printk(KERN_DEBUG "%s: Trying to send a packet, Tx index %d.\n",
                                   dev->name, vp->cur_tx);
        }

        if (vp->tx_full) {
                if (vortex_debug > 0)
                        printk(KERN_WARNING "%s: Tx Ring full, refusing to send buffer.\n",
                                   dev->name);
                return 1;
        }
        vp->tx_skbuff[entry] = skb;
        vp->tx_ring[entry].next = 0;
        vp->tx_ring[entry].addr = cpu_to_le32(pci_map_single(vp->pdev, skb->data, skb->len, PCI_DMA_TODEVICE));
        vp->tx_ring[entry].length = cpu_to_le32(skb->len | LAST_FRAG);
        vp->tx_ring[entry].status = cpu_to_le32(skb->len | TxIntrUploaded);

        spin_lock_irqsave(&vp->lock, flags);
        /* Wait for the stall to complete. */
        wait_for_completion(dev, DownStall);
        prev_entry->next = cpu_to_le32(vp->tx_ring_dma + entry * sizeof(struct boom_tx_desc));
        if (inl(ioaddr + DownListPtr) == 0) {
                outl(vp->tx_ring_dma + entry * sizeof(struct boom_tx_desc), ioaddr + DownListPtr);
                queued_packet++;
        }

        vp->cur_tx++;
        if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1) {
                vp->tx_full = 1;
                netif_stop_queue (dev);
        } else {                                        /* Clear previous interrupt enable. */
#if defined(tx_interrupt_mitigation)
                prev_entry->status &= cpu_to_le32(~TxIntrUploaded);
#endif
                /* netif_start_queue (dev); */          /* AKPM: redundant? */
        }
        outw(DownUnstall, ioaddr + EL3_CMD);
        spin_unlock_irqrestore(&vp->lock, flags);
        dev->trans_start = jiffies;
        return 0;
}

/* The interrupt handler does all of the Rx thread work and cleans up
   after the Tx thread. */

/*
 * This is the ISR for the vortex series chips.
 * full_bus_master_tx == 0 && full_bus_master_rx == 0
 */

static void vortex_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
        struct net_device *dev = dev_id;
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr;
        int status;
        int work_done = max_interrupt_work;
        
        ioaddr = dev->base_addr;
        spin_lock(&vp->lock);

        status = inw(ioaddr + EL3_STATUS);

        if (vortex_debug > 6)
                printk("vortex_interrupt(). status=0x%4x\n", status);

        if ((status & IntLatch) == 0)
                goto handler_exit;              /* No interrupt: shared IRQs cause this */

        if (status & IntReq) {
                status |= vp->deferred;
                vp->deferred = 0;
        }

        if (status == 0xffff)           /* AKPM: h/w no longer present (hotplug)? */
                goto handler_exit;

        if (vortex_debug > 4)
                printk(KERN_DEBUG "%s: interrupt, status %4.4x, latency %d ticks.\n",
                           dev->name, status, inb(ioaddr + Timer));

        do {
                if (vortex_debug > 5)
                                printk(KERN_DEBUG "%s: In interrupt loop, status %4.4x.\n",
                                           dev->name, status);
                if (status & RxComplete)
                        vortex_rx(dev);

                if (status & TxAvailable) {
                        if (vortex_debug > 5)
                                printk(KERN_DEBUG "     TX room bit was handled.\n");
                        /* There's room in the FIFO for a full-sized packet. */
                        outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
                        netif_wake_queue (dev);
                }

                if (status & DMADone) {
                        if (inw(ioaddr + Wn7_MasterStatus) & 0x1000) {
                                outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
                                pci_unmap_single(vp->pdev, vp->tx_skb_dma, (vp->tx_skb->len + 3) & ~3, PCI_DMA_TODEVICE);
                                dev_kfree_skb_irq(vp->tx_skb); /* Release the transferred buffer */
                                if (inw(ioaddr + TxFree) > 1536) {
                                        /*
                                         * AKPM: FIXME: I don't think we need this.  If the queue was stopped due to
                                         * insufficient FIFO room, the TxAvailable test will succeed and call
                                         * netif_wake_queue()
                                         */
                                        netif_wake_queue(dev);
                                } else { /* Interrupt when FIFO has room for max-sized packet. */
                                        outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD);
                                        netif_stop_queue(dev);          /* AKPM: This is new */
                                }
                        }
                }
                /* Check for all uncommon interrupts at once. */
                if (status & (HostError | RxEarly | StatsFull | TxComplete | IntReq)) {
                        if (status == 0xffff)
                                break;
                        vortex_error(dev, status);
                }

                if (--work_done < 0) {
                        printk(KERN_WARNING "%s: Too much work in interrupt, status "
                                   "%4.4x.\n", dev->name, status);
                        /* Disable all pending interrupts. */
                        do {
                                vp->deferred |= status;
                                outw(SetStatusEnb | (~vp->deferred & vp->status_enable),
                                         ioaddr + EL3_CMD);
                                outw(AckIntr | (vp->deferred & 0x7ff), ioaddr + EL3_CMD);
                        } while ((status = inw(ioaddr + EL3_CMD)) & IntLatch);
                        /* The timer will reenable interrupts. */
                        mod_timer(&vp->timer, jiffies + 1*HZ);
                        break;
                }
                /* Acknowledge the IRQ. */
                outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
        } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));

        if (vortex_debug > 4)
                printk(KERN_DEBUG "%s: exiting interrupt, status %4.4x.\n",
                           dev->name, status);
handler_exit:
        spin_unlock(&vp->lock);
}

/*
 * This is the ISR for the boomerang series chips.
 * full_bus_master_tx == 1 && full_bus_master_rx == 1
 */

static void boomerang_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
        struct net_device *dev = dev_id;
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr;
        int status;
        int work_done = max_interrupt_work;

        ioaddr = dev->base_addr;

        /*
         * It seems dopey to put the spinlock this early, but we could race against vortex_tx_timeout
         * and boomerang_start_xmit
         */
        spin_lock(&vp->lock);

        status = inw(ioaddr + EL3_STATUS);

        if (vortex_debug > 6)
                printk(KERN_DEBUG "boomerang_interrupt. status=0x%4x\n", status);

        if ((status & IntLatch) == 0)
                goto handler_exit;              /* No interrupt: shared IRQs can cause this */

        if (status == 0xffff) {         /* AKPM: h/w no longer present (hotplug)? */
                if (vortex_debug > 1)
                        printk(KERN_DEBUG "boomerang_interrupt(1): status = 0xffff\n");
                goto handler_exit;
        }

        if (status & IntReq) {
                status |= vp->deferred;
                vp->deferred = 0;
        }

        if (vortex_debug > 4)
                printk(KERN_DEBUG "%s: interrupt, status %4.4x, latency %d ticks.\n",
                           dev->name, status, inb(ioaddr + Timer));
        do {
                if (vortex_debug > 5)
                                printk(KERN_DEBUG "%s: In interrupt loop, status %4.4x.\n",
                                           dev->name, status);
                if (status & UpComplete) {
                        outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
                        if (vortex_debug > 5)
                                printk(KERN_DEBUG "boomerang_interrupt->boomerang_rx\n");
                        boomerang_rx(dev);
                }

                if (status & DownComplete) {
                        unsigned int dirty_tx = vp->dirty_tx;

                        outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
                        while (vp->cur_tx - dirty_tx > 0) {
                                int entry = dirty_tx % TX_RING_SIZE;
#if 1   /* AKPM: the latter is faster, but cyclone-only */
                                if (inl(ioaddr + DownListPtr) ==
                                        vp->tx_ring_dma + entry * sizeof(struct boom_tx_desc))
                                        break;                  /* It still hasn't been processed. */
#else
                                if ((vp->tx_ring[entry].status & DN_COMPLETE) == 0)
                                        break;                  /* It still hasn't been processed. */
#endif
                                        
                                if (vp->tx_skbuff[entry]) {
                                        struct sk_buff *skb = vp->tx_skbuff[entry];
                                        
                                        pci_unmap_single(vp->pdev,
                                                le32_to_cpu(vp->tx_ring[entry].addr), skb->len, PCI_DMA_TODEVICE);
                                        dev_kfree_skb_irq(skb);
                                        vp->tx_skbuff[entry] = 0;
                                } else {
                                        printk(KERN_DEBUG "boomerang_interrupt: no skb!\n");
                                }
                                /* vp->stats.tx_packets++;  Counted below. */
                                dirty_tx++;
                        }
                        vp->dirty_tx = dirty_tx;
                        if (vp->tx_full && (vp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
                                if (vortex_debug > 6)
                                        printk(KERN_DEBUG "boomerang_interrupt: clearing tx_full\n");
                                vp->tx_full = 0;
                                netif_wake_queue (dev);
                        }
                }

                /* Check for all uncommon interrupts at once. */
                if (status & (HostError | RxEarly | StatsFull | TxComplete | IntReq))
                        vortex_error(dev, status);

                if (--work_done < 0) {
                        printk(KERN_WARNING "%s: Too much work in interrupt, status "
                                   "%4.4x.\n", dev->name, status);
                        /* Disable all pending interrupts. */
                        do {
                                vp->deferred |= status;
                                outw(SetStatusEnb | (~vp->deferred & vp->status_enable),
                                         ioaddr + EL3_CMD);
                                outw(AckIntr | (vp->deferred & 0x7ff), ioaddr + EL3_CMD);
                        } while ((status = inw(ioaddr + EL3_CMD)) & IntLatch);
                        /* The timer will reenable interrupts. */
                        mod_timer(&vp->timer, jiffies + 1*HZ);
                        break;
                }
                /* Acknowledge the IRQ. */
                outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
                if (vp->cb_fn_base)                     /* The PCMCIA people are idiots.  */
                        writel(0x8000, vp->cb_fn_base + 4);

        } while ((status = inw(ioaddr + EL3_STATUS)) & IntLatch);

        if (vortex_debug > 4)
                printk(KERN_DEBUG "%s: exiting interrupt, status %4.4x.\n",
                           dev->name, status);
handler_exit:
        spin_unlock(&vp->lock);
}

static int vortex_rx(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;
        int i;
        short rx_status;

        if (vortex_debug > 5)
                printk(KERN_DEBUG "vortex_rx(): status %4.4x, rx_status %4.4x.\n",
                           inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus));
        while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
                if (rx_status & 0x4000) { /* Error, update stats. */
                        unsigned char rx_error = inb(ioaddr + RxErrors);
                        if (vortex_debug > 2)
                                printk(KERN_DEBUG " Rx error: status %2.2x.\n", rx_error);
                        vp->stats.rx_errors++;
                        if (rx_error & 0x01)  vp->stats.rx_over_errors++;
                        if (rx_error & 0x02)  vp->stats.rx_length_errors++;
                        if (rx_error & 0x04)  vp->stats.rx_frame_errors++;
                        if (rx_error & 0x08)  vp->stats.rx_crc_errors++;
                        if (rx_error & 0x10)  vp->stats.rx_length_errors++;
                } else {
                        /* The packet length: up to 4.5K!. */
                        int pkt_len = rx_status & 0x1fff;
                        struct sk_buff *skb;

                        skb = dev_alloc_skb(pkt_len + 5);
                        if (vortex_debug > 4)
                                printk(KERN_DEBUG "Receiving packet size %d status %4.4x.\n",
                                           pkt_len, rx_status);
                        if (skb != NULL) {
                                skb->dev = dev;
                                skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
                                /* 'skb_put()' points to the start of sk_buff data area. */
                                if (vp->bus_master &&
                                        ! (inw(ioaddr + Wn7_MasterStatus) & 0x8000)) {
                                        dma_addr_t dma = pci_map_single(vp->pdev, skb_put(skb, pkt_len),
                                                                           pkt_len, PCI_DMA_FROMDEVICE);
                                        outl(dma, ioaddr + Wn7_MasterAddr);
                                        outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
                                        outw(StartDMAUp, ioaddr + EL3_CMD);
                                        while (inw(ioaddr + Wn7_MasterStatus) & 0x8000)
                                                ;
                                        pci_unmap_single(vp->pdev, dma, pkt_len, PCI_DMA_FROMDEVICE);
                                } else {
                                        insl(ioaddr + RX_FIFO, skb_put(skb, pkt_len),
                                                 (pkt_len + 3) >> 2);
                                }
                                outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
                                skb->protocol = eth_type_trans(skb, dev);
                                netif_rx(skb);
                                dev->last_rx = jiffies;
                                vp->stats.rx_packets++;
                                /* Wait a limited time to go to next packet. */
                                for (i = 200; i >= 0; i--)
                                        if ( ! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
                                                break;
                                continue;
                        } else if (vortex_debug > 0)
                                printk(KERN_NOTICE "%s: No memory to allocate a sk_buff of "
                                           "size %d.\n", dev->name, pkt_len);
                }
                vp->stats.rx_dropped++;
                wait_for_completion(dev, RxDiscard);
        }

        return 0;
}

static int
boomerang_rx(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        int entry = vp->cur_rx % RX_RING_SIZE;
        long ioaddr = dev->base_addr;
        int rx_status;
        int rx_work_limit = vp->dirty_rx + RX_RING_SIZE - vp->cur_rx;

        if (vortex_debug > 5)
                printk(KERN_DEBUG "boomerang_rx(): status %4.4x\n", inw(ioaddr+EL3_STATUS));

        while ((rx_status = le32_to_cpu(vp->rx_ring[entry].status)) & RxDComplete){
                if (--rx_work_limit < 0)
                        break;
                if (rx_status & RxDError) { /* Error, update stats. */
                        unsigned char rx_error = rx_status >> 16;
                        if (vortex_debug > 2)
                                printk(KERN_DEBUG " Rx error: status %2.2x.\n", rx_error);
                        vp->stats.rx_errors++;
                        if (rx_error & 0x01)  vp->stats.rx_over_errors++;
                        if (rx_error & 0x02)  vp->stats.rx_length_errors++;
                        if (rx_error & 0x04)  vp->stats.rx_frame_errors++;
                        if (rx_error & 0x08)  vp->stats.rx_crc_errors++;
                        if (rx_error & 0x10)  vp->stats.rx_length_errors++;
                } else {
                        /* The packet length: up to 4.5K!. */
                        int pkt_len = rx_status & 0x1fff;
                        struct sk_buff *skb;
                        dma_addr_t dma = le32_to_cpu(vp->rx_ring[entry].addr);

                        vp->stats.rx_bytes += pkt_len;
                        if (vortex_debug > 4)
                                printk(KERN_DEBUG "Receiving packet size %d status %4.4x.\n",
                                           pkt_len, rx_status);

                        /* Check if the packet is long enough to just accept without
                           copying to a properly sized skbuff. */
                        if (pkt_len < rx_copybreak && (skb = dev_alloc_skb(pkt_len + 2)) != 0) {
                                skb->dev = dev;
                                skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
                                pci_dma_sync_single(vp->pdev, dma, PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
                                /* 'skb_put()' points to the start of sk_buff data area. */
                                memcpy(skb_put(skb, pkt_len),
                                           vp->rx_skbuff[entry]->tail,
                                           pkt_len);
                                rx_copy++;
                        } else {
                                /* Pass up the skbuff already on the Rx ring. */
                                skb = vp->rx_skbuff[entry];
                                vp->rx_skbuff[entry] = NULL;
                                skb_put(skb, pkt_len);
                                pci_unmap_single(vp->pdev, dma, PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
                                rx_nocopy++;
                        }
                        skb->protocol = eth_type_trans(skb, dev);
                        {                                       /* Use hardware checksum info. */
                                int csum_bits = rx_status & 0xee000000;
                                if (csum_bits &&
                                        (csum_bits == (IPChksumValid | TCPChksumValid) ||
                                         csum_bits == (IPChksumValid | UDPChksumValid))) {
                                        skb->ip_summed = CHECKSUM_UNNECESSARY;
                                        rx_csumhits++;
                                }
                        }
                        netif_rx(skb);
                        dev->last_rx = jiffies;
                        vp->stats.rx_packets++;
                }
                entry = (++vp->cur_rx) % RX_RING_SIZE;
        }
        /* Refill the Rx ring buffers. */
        for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
                struct sk_buff *skb;
                entry = vp->dirty_rx % RX_RING_SIZE;
                if (vp->rx_skbuff[entry] == NULL) {
                        skb = dev_alloc_skb(PKT_BUF_SZ);
                        if (skb == NULL) {
                                static unsigned long last_jif;
                                if ((jiffies - last_jif) > 10 * HZ) {
                                        printk(KERN_WARNING "%s: memory shortage\n", dev->name);
                                        last_jif = jiffies;
                                }
                                if ((vp->cur_rx - vp->dirty_rx) == RX_RING_SIZE)
                                        mod_timer(&vp->rx_oom_timer, RUN_AT(HZ * 1));
                                break;                  /* Bad news!  */
                        }
                        skb->dev = dev;                 /* Mark as being used by this device. */
                        skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
                        vp->rx_ring[entry].addr = cpu_to_le32(pci_map_single(vp->pdev, skb->tail, PKT_BUF_SZ, PCI_DMA_FROMDEVICE));
                        vp->rx_skbuff[entry] = skb;
                }
                vp->rx_ring[entry].status = 0;  /* Clear complete bit. */
                outw(UpUnstall, ioaddr + EL3_CMD);
        }
        return 0;
}

/*
 * If we've hit a total OOM refilling the Rx ring we poll once a second
 * for some memory.  Otherwise there is no way to restart the rx process.
 */
static void
rx_oom_timer(unsigned long arg)
{
        struct net_device *dev = (struct net_device *)arg;
        struct vortex_private *vp = (struct vortex_private *)dev->priv;

        spin_lock_irq(&vp->lock);
        if ((vp->cur_rx - vp->dirty_rx) == RX_RING_SIZE)        /* This test is redundant, but makes me feel good */
                boomerang_rx(dev);
        if (vortex_debug > 1) {
                printk(KERN_DEBUG "%s: rx_oom_timer %s\n", dev->name,
                        ((vp->cur_rx - vp->dirty_rx) != RX_RING_SIZE) ? "succeeded" : "retrying");
        }
        spin_unlock_irq(&vp->lock);
}

static void
vortex_down(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;

        netif_stop_queue (dev);

        del_timer_sync(&vp->rx_oom_timer);
        del_timer_sync(&vp->timer);

        /* Turn off statistics ASAP.  We update vp->stats below. */
        outw(StatsDisable, ioaddr + EL3_CMD);

        /* Disable the receiver and transmitter. */
        outw(RxDisable, ioaddr + EL3_CMD);
        outw(TxDisable, ioaddr + EL3_CMD);

        if (dev->if_port == XCVR_10base2)
                /* Turn off thinnet power.  Green! */
                outw(StopCoax, ioaddr + EL3_CMD);

        outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);

        update_stats(ioaddr, dev);
        if (vp->full_bus_master_rx)
                outl(0, ioaddr + UpListPtr);
        if (vp->full_bus_master_tx)
                outl(0, ioaddr + DownListPtr);

        if (vp->capabilities & CapPwrMgmt)
                acpi_set_WOL(dev);
}

static int
vortex_close(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;
        int i;

        if (netif_device_present(dev))
                vortex_down(dev);

        if (vortex_debug > 1) {
                printk(KERN_DEBUG"%s: vortex_close() status %4.4x, Tx status %2.2x.\n",
                           dev->name, inw(ioaddr + EL3_STATUS), inb(ioaddr + TxStatus));
                printk(KERN_DEBUG "%s: vortex close stats: rx_nocopy %d rx_copy %d"
                           " tx_queued %d Rx pre-checksummed %d.\n",
                           dev->name, rx_nocopy, rx_copy, queued_packet, rx_csumhits);
        }

        free_irq(dev->irq, dev);

        if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
                for (i = 0; i < RX_RING_SIZE; i++)
                        if (vp->rx_skbuff[i]) {
                                pci_unmap_single(       vp->pdev, le32_to_cpu(vp->rx_ring[i].addr),
                                                                        PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
                                dev_kfree_skb(vp->rx_skbuff[i]);
                                vp->rx_skbuff[i] = 0;
                        }
        }
        if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
                for (i = 0; i < TX_RING_SIZE; i++)
                        if (vp->tx_skbuff[i]) {
                                struct sk_buff *skb = vp->tx_skbuff[i];

                                pci_unmap_single(vp->pdev, le32_to_cpu(vp->tx_ring[i].addr), skb->len, PCI_DMA_TODEVICE);
                                dev_kfree_skb(skb);
                                vp->tx_skbuff[i] = 0;
                        }
        }

        vp->open = 0;
        return 0;
}

static void
dump_tx_ring(struct net_device *dev)
{
        if (vortex_debug > 0) {
                struct vortex_private *vp = (struct vortex_private *)dev->priv;
                long ioaddr = dev->base_addr;
                
                if (vp->full_bus_master_tx) {
                        int i;
                        int stalled = inl(ioaddr + PktStatus) & 0x04;   /* Possible racy. But it's only debug stuff */

                        wait_for_completion(dev, DownStall);
                        printk(KERN_ERR "  Flags; bus-master %d, full %d; dirty %d(%d) "
                                        "current %d(%d).\n",
                                        vp->full_bus_master_tx, vp->tx_full,
                                        vp->dirty_tx, vp->dirty_tx % TX_RING_SIZE,
                                        vp->cur_tx, vp->cur_tx % TX_RING_SIZE);
                        printk(KERN_ERR "  Transmit list %8.8x vs. %p.\n",
                                   inl(ioaddr + DownListPtr),
                                   &vp->tx_ring[vp->dirty_tx % TX_RING_SIZE]);
                        for (i = 0; i < TX_RING_SIZE; i++) {
                                printk(KERN_ERR "  %d: @%p  length %8.8x status %8.8x\n", i,
                                           &vp->tx_ring[i],
                                           le32_to_cpu(vp->tx_ring[i].length),
                                           le32_to_cpu(vp->tx_ring[i].status));
                        }
                        if (!stalled)
                                outw(DownUnstall, ioaddr + EL3_CMD);
                }
        }
}

static struct net_device_stats *vortex_get_stats(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        unsigned long flags;

        if (netif_device_present(dev)) {        /* AKPM: Used to be netif_running */
                spin_lock_irqsave (&vp->lock, flags);
                update_stats(dev->base_addr, dev);
                spin_unlock_irqrestore (&vp->lock, flags);
        }
        return &vp->stats;
}

/*  Update statistics.
        Unlike with the EL3 we need not worry about interrupts changing
        the window setting from underneath us, but we must still guard
        against a race condition with a StatsUpdate interrupt updating the
        table.  This is done by checking that the ASM (!) code generated uses
        atomic updates with '+='.
        */
static void update_stats(long ioaddr, struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        int old_window = inw(ioaddr + EL3_CMD);

        if (old_window == 0xffff)       /* Chip suspended or ejected. */
                return;
        /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
        /* Switch to the stats window, and read everything. */
        EL3WINDOW(6);
        vp->stats.tx_carrier_errors             += inb(ioaddr + 0);
        vp->stats.tx_heartbeat_errors   += inb(ioaddr + 1);
        /* Multiple collisions. */              inb(ioaddr + 2);
        vp->stats.collisions                    += inb(ioaddr + 3);
        vp->stats.tx_window_errors              += inb(ioaddr + 4);
        vp->stats.rx_fifo_errors                += inb(ioaddr + 5);
        vp->stats.tx_packets                    += inb(ioaddr + 6);
        vp->stats.tx_packets                    += (inb(ioaddr + 9)&0x30) << 4;
        /* Rx packets   */                              inb(ioaddr + 7);   /* Must read to clear */
        /* Tx deferrals */                              inb(ioaddr + 8);
        /* Don't bother with register 9, an extension of registers 6&7.
           If we do use the 6&7 values the atomic update assumption above
           is invalid. */
        vp->stats.rx_bytes += inw(ioaddr + 10);
        vp->stats.tx_bytes += inw(ioaddr + 12);
        /* New: On the Vortex we must also clear the BadSSD counter. */
        EL3WINDOW(4);
        inb(ioaddr + 12);

        {
                u8 up = inb(ioaddr + 13);
                vp->stats.rx_bytes += (up & 0x0f) << 16;
                vp->stats.tx_bytes += (up & 0xf0) << 12;
        }

        /* We change back to window 7 (not 1) with the Vortex. */
        /* AKPM: the previous comment is obsolete - we switch back to the old window */
        EL3WINDOW(old_window >> 13);
        return;
}

static int vortex_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;
        u16 *data = (u16 *)&rq->ifr_data;
        int phy = vp->phys[0] & 0x1f;
        int retval;

        switch(cmd) {
        case SIOCDEVPRIVATE:            /* Get the address of the PHY in use. */
                data[0] = phy;
        case SIOCDEVPRIVATE+1:          /* Read the specified MII register. */
                EL3WINDOW(4);
                data[3] = mdio_read(dev, data[0] & 0x1f, data[1] & 0x1f);
                retval = 0;
                break;
        case SIOCDEVPRIVATE+2:          /* Write the specified MII register */
                if (!capable(CAP_NET_ADMIN)) {
                        retval = -EPERM;
                } else {
                        EL3WINDOW(4);
                        mdio_write(dev, data[0] & 0x1f, data[1] & 0x1f, data[2]);
                        retval = 0;
                }
                break;
        default:
                retval = -EOPNOTSUPP;
                break;
        }

        return retval;
}

/* Pre-Cyclone chips have no documented multicast filter, so the only
   multicast setting is to receive all multicast frames.  At least
   the chip has a very clean way to set the mode, unlike many others. */
static void set_rx_mode(struct net_device *dev)
{
        long ioaddr = dev->base_addr;
        int new_mode;

        if (dev->flags & IFF_PROMISC) {
                if (vortex_debug > 0)
                        printk(KERN_NOTICE "%s: Setting promiscuous mode.\n", dev->name);
                new_mode = SetRxFilter|RxStation|RxMulticast|RxBroadcast|RxProm;
        } else  if ((dev->mc_list)  ||  (dev->flags & IFF_ALLMULTI)) {
                new_mode = SetRxFilter|RxStation|RxMulticast|RxBroadcast;
        } else
                new_mode = SetRxFilter | RxStation | RxBroadcast;

        outw(new_mode, ioaddr + EL3_CMD);
}

/* MII transceiver control section.
   Read and write the MII registers using software-generated serial
   MDIO protocol.  See the MII specifications or DP83840A data sheet
   for details. */

/* The maximum data clock rate is 2.5 Mhz.  The minimum timing is usually
   met by back-to-back PCI I/O cycles, but we insert a delay to avoid
   "overclocking" issues. */
#define mdio_delay() inl(mdio_addr)

#define MDIO_SHIFT_CLK  0x01
#define MDIO_DIR_WRITE  0x04
#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE)
#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE)
#define MDIO_DATA_READ  0x02
#define MDIO_ENB_IN             0x00

/* Generate the preamble required for initial synchronization and
   a few older transceivers. */
static void mdio_sync(long ioaddr, int bits)
{
        long mdio_addr = ioaddr + Wn4_PhysicalMgmt;

        /* Establish sync by sending at least 32 logic ones. */
        while (-- bits >= 0) {
                outw(MDIO_DATA_WRITE1, mdio_addr);
                mdio_delay();
                outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
                mdio_delay();
        }
}

static int mdio_read(struct net_device *dev, int phy_id, int location)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        int i;
        long ioaddr = dev->base_addr;
        int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
        unsigned int retval = 0;
        long mdio_addr = ioaddr + Wn4_PhysicalMgmt;

        spin_lock_bh(&vp->mdio_lock);

        if (mii_preamble_required)
                mdio_sync(ioaddr, 32);

        /* Shift the read command bits out. */
        for (i = 14; i >= 0; i--) {
                int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
                outw(dataval, mdio_addr);
                mdio_delay();
                outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
                mdio_delay();
        }
        /* Read the two transition, 16 data, and wire-idle bits. */
        for (i = 19; i > 0; i--) {
                outw(MDIO_ENB_IN, mdio_addr);
                mdio_delay();
                retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
                outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
                mdio_delay();
        }
        spin_unlock_bh(&vp->mdio_lock);
        return retval & 0x20000 ? 0xffff : retval>>1 & 0xffff;
}

static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;
        int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value;
        long mdio_addr = ioaddr + Wn4_PhysicalMgmt;
        int i;

        spin_lock_bh(&vp->mdio_lock);

        if (mii_preamble_required)
                mdio_sync(ioaddr, 32);

        /* Shift the command bits out. */
        for (i = 31; i >= 0; i--) {
                int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
                outw(dataval, mdio_addr);
                mdio_delay();
                outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
                mdio_delay();
        }
        /* Leave the interface idle. */
        for (i = 1; i >= 0; i--) {
                outw(MDIO_ENB_IN, mdio_addr);
                mdio_delay();
                outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
                mdio_delay();
        }
        spin_unlock_bh(&vp->mdio_lock);
        return;
}
\f
/* ACPI: Advanced Configuration and Power Interface. */
/* Set Wake-On-LAN mode and put the board into D3 (power-down) state. */
static void acpi_set_WOL(struct net_device *dev)
{
        struct vortex_private *vp = (struct vortex_private *)dev->priv;
        long ioaddr = dev->base_addr;

        /* AKPM: This kills the 905 */
        if (vortex_debug > 1) {
                printk(KERN_INFO PFX "Wake-on-LAN functions disabled\n");
        }
        return;

        /* Power up on: 1==Downloaded Filter, 2==Magic Packets, 4==Link Status. */
        EL3WINDOW(7);
        outw(2, ioaddr + 0x0c);
        /* The RxFilter must accept the WOL frames. */
        outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD);
        outw(RxEnable, ioaddr + EL3_CMD);
        /* Change the power state to D3; RxEnable doesn't take effect. */
        pci_write_config_word(vp->pdev, 0xe0, 0x8103);
}


static void __devexit vortex_remove_one (struct pci_dev *pdev)
{
        struct net_device *dev = pdev->driver_data;
        struct vortex_private *vp;

        if (!dev) {
                printk("vortex_remove_one called for EISA device!\n");
                BUG();
        }

        vp = (void *)(dev->priv);

        /* AKPM: FIXME: we should have
         *      if (vp->cb_fn_base) iounmap(vp->cb_fn_base);
         * here
         */
        unregister_netdev(dev);
        outw(TotalReset, dev->base_addr + EL3_CMD);
        if (vp->must_free_region)
                release_region(dev->base_addr, vp->io_size);
        kfree(dev);
}


static struct pci_driver vortex_driver = {
        name:           "3c575_cb",
        probe:          vortex_init_one,
        remove:         vortex_remove_one,
        suspend:        vortex_suspend,
        resume:         vortex_resume,
        id_table:       vortex_pci_tbl,
};


static int vortex_have_pci;
static int vortex_have_eisa;


static int __init vortex_init (void)
{
        int rc;
        
        rc = pci_module_init(&vortex_driver);
        if (rc < 0) {
                rc = vortex_eisa_init();
                if (rc > 0)
                        vortex_have_eisa = 1;
        } else {
                vortex_have_pci = 1;
        }

        return rc;
}


static void __exit vortex_eisa_cleanup (void)
{
        struct net_device *dev, *tmp;
        struct vortex_private *vp;
        long ioaddr;

        dev = root_vortex_eisa_dev;

        while (dev) {
                vp = dev->priv;
                ioaddr = dev->base_addr;

                unregister_netdev (dev);
                outw (TotalReset, ioaddr + EL3_CMD);
                release_region (ioaddr, VORTEX_TOTAL_SIZE);

                tmp = dev;
                dev = vp->next_module;

                kfree (tmp);
        }
}


static void __exit vortex_cleanup (void)
{
        if (vortex_have_pci)
                pci_unregister_driver (&vortex_driver);
        if (vortex_have_eisa)
                vortex_eisa_cleanup ();
}


module_init(vortex_init);
module_exit(vortex_cleanup);


\f
/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 *  tab-width: 4
 * End:
 */