/drivers/e1000-2.x/e1000_main.c

/*****************************************************************************
 *****************************************************************************
Copyright (c) 1999 - 2000, Intel Corporation 

All rights reserved.

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    this list of conditions and the following disclaimer.

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    and/or other materials provided with the distribution.

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    may be used to endorse or promote products derived from this software 
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/**********************************************************************
*                                                                     *
* INTEL CORPORATION                                                   *
*                                                                     *
* This software is supplied under the terms of the license included   *
* above.  All use of this driver must be in accordance with the terms *
* of that license.                                                    *
*                                                                     *
* Module Name:  e1000.c                                               *
*                                                                     *
* Abstract:     Functions for the driver entry points like load,      *
*               unload, open and close. All board specific calls made *
*               by the network interface section of the driver.       *
*                                                                     *
* Environment:  This file is intended to be specific to the Linux     *
*               operating system.                                     *
*                                                                     *
**********************************************************************/

 
/* This first section contains the setable parametes for configuring the 
 * driver into the kernel.
 */

#define E1000_DEBUG_DEFAULT 0
static int e1000_debug_level = E1000_DEBUG_DEFAULT;

/* global defines */
#define MAX_TCB      256            /* number of transmit descriptors */
#define MAX_RFD      256            /* number of receive descriptors */

/* includes */
#ifdef MODULE
#ifdef MODVERSIONS
#include <linux/modversions.h>
#endif
#include <linux/module.h>
#endif
#define E1000_MAIN_STATIC
#ifdef IANS
#define _IANS_MAIN_MODULE_C_
#endif

#include "e1000.h"
#include "e1000_vendor_info.h"
#include "e1000_proc.h"

/* Global Data structures and variables */
static const char *version =
"Intel(R) PRO/1000 Gigabit Ethernet Adapter - Loadable driver, ver. 2.5.11\n";
static char e1000_copyright[] = "         Copyright (c) 1999-2000 Intel Corporation\n";
static char e1000id_string[128] = "Intel(R) PRO/1000 Gigabit Server Adapter";
static char e1000_driver[] = "e1000";
static char e1000_version[] = "2.5.11";

static bd_config_t *e1000first = NULL;
static int e1000boards = 0;
static int e1000_rxfree_cnt = 0;

/* Driver performance tuning variables */
static uint_t e1000_pcimlt_override = 0;
static uint_t e1000_pcimwi_enable = 1;
static uint_t e1000_txint_delay = 128;
#if 1
static uint_t e1000_rxint_delay = 128; /* RTM turn on rcv intr coalescing? microseconds? */
#else
static uint_t e1000_rxint_delay = 0;
#endif

#if 1
static int e1000_flow_ctrl = 0; /* RTM turn off flow control */
#else
static int e1000_flow_ctrl = 3;
#endif
static int e1000_rxpci_priority = 0;
static uint_t e1000_maxdpc_count = 5;

static int TxDescriptors[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
static int RxDescriptors[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };

/* Feature enable/disable */
static int Jumbo[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
static int WaitForLink[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
static int SBP[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };

/* Speed and Duplex Settings */
static int AutoNeg[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
static int Speed[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
static int ForceDuplex[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };

/* This parameter determines whether the driver sets the RS bit or the
 * RPS bit in a transmit packet. These are the possible values for this
 * parameter:
 * e1000_ReportTxEarly = 0  ==>  set the RPS bit
 *                      = 1  ==>  set the RS bit
 *                      = 2  ==>  (default) let the driver auto-detect
 *
 * If the RS bit is set in a packet, an interrupts is generated as soon
 * as the packet is DMAed from host memory to the FIFO. If the RPS bit
 * is set, an interrupt is generated after the packet has been transmitted
 * on the wire.
 */
static uchar_t e1000_ReportTxEarly = 2;    /* let the driver auto-detect */


/* these next ones are for Linux specific things */
static int probed = 0;

static int e1000_tx_queue(struct device *dev, struct sk_buff *skb);
static int e1000_tx_start(struct device *dev);
static int e1000_rx_refill(struct device *dev, struct sk_buff **);
static int e1000_tx_eob(struct device *dev);
static struct sk_buff *e1000_tx_clean(struct device *dev);
static struct sk_buff *e1000_rx_poll(struct device *dev, int *want);
static int e1000_poll_on(struct device *dev);
static int e1000_poll_off(struct device *dev);

/* The system interface routines */

/****************************************************************************
* Name:        e1000_probe
*
* Description: This routine is called when the dynamic driver module
*              "e1000" is loaded using the command "insmod".
*
*               This is a Linux required routine.
*
* Author:      IntelCorporation
*
* Born on Date:    07/11/99
*
* Arguments:   
*       NONE
*
* Returns:
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
int
e1000_probe()
{
    device_t *dev;
    bd_config_t *bdp;
    PADAPTER_STRUCT Adapter;
    pci_dev_t *pcid = NULL;
    int num_boards = 0;
    int first_time = 0, loop_cnt = 0;

    if (e1000_debug_level >= 1)
        printk("e1000_probe()\n");

    /* Has the probe routine been called before? The driver can be probed only
     * once.
     */
    if (probed)
        return (0);
    else
        probed++;

    /* does the system support pci? */
    if ((!CONFIG_PCI) || (!pci_present()))
        return (0);

#ifdef CONFIG_PROC_FS
  {
    int     len;

    /* first check if e1000_proc_dir already exists */
    len = strlen(ADAPTERS_PROC_DIR);
    for (e1000_proc_dir=proc_net->subdir;e1000_proc_dir;
        e1000_proc_dir=e1000_proc_dir->next) {
        if ((e1000_proc_dir->namelen == len) &&
            (!memcmp(e1000_proc_dir->name, ADAPTERS_PROC_DIR, len)))
            break;
        }
        if (!e1000_proc_dir)
            e1000_proc_dir = 
                create_proc_entry(ADAPTERS_PROC_DIR, S_IFDIR, proc_net);
        if (!e1000_proc_dir) return -ENODEV;
  }
#endif
    
    /* loop through all of the ethernet PCI devices looking for ours */
    while ((pcid = pci_find_class(PCI_CLASS_NETWORK_ETHERNET << 8, pcid))) {
        dev = NULL;

        if (e1000_debug_level >= 2)
            printk("e1000_probe: vendor = 0x%x, device = 0x%x \n", 
                    pcid->vendor, pcid->device);
                 

        /* is the device ours? */
        if ((pcid->vendor != E1000_VENDOR_ID) ||
            !((pcid->device == WISEMAN_DEVICE_ID) ||
              (pcid->device == LIVENGOOD_FIBER_DEVICE_ID) ||
              (pcid->device == LIVENGOOD_COPPER_DEVICE_ID))) continue;    /* No, continue */

        if (!first_time) {
            /* only display the version message one time */
            first_time = 1;

            /* print out the version */
            printk("%s", version);
            printk("%s\n", e1000_copyright);
        }

        /* register the net device, but don't allocate a private structure yet */
        dev = init_etherdev(dev, 0);

        if (dev == NULL) {
            printk(KERN_ERR "Not able to alloc etherdev struct\n");
            break;
        }

        /* Allocate all the memory that the driver will need */
        if (!(bdp = e1000_alloc_space())) {
            printk("%s - Failed to allocate memory\n", e1000_driver);
            e1000_dealloc_space(bdp);
            return 0;
        }
        bdp->device = dev;

#ifdef CONFIG_PROC_FS
        if (e1000_create_proc_dev(bdp) < 0) {
            e1000_remove_proc_dev(dev);
            e1000_dealloc_space(bdp);
            continue; /*return e100nics;*/
        }
#endif        

        /* init the timer */
        bdp->timer_val = -1;

        /* point the Adapter to the bddp */
        Adapter = (PADAPTER_STRUCT) bdp->bddp;

#ifdef IANS
        bdp->iANSdata = kmalloc(sizeof(iANSsupport_t), GFP_KERNEL);
        memset((PVOID) bdp->iANSdata, 0, sizeof(iANSsupport_t));
        bd_ans_drv_InitANS(bdp, bdp->iANSdata);
#endif

        /*
         * Obtain the PCI specific information about the driver.
         */
        if (e1000_find_pci_device(pcid, Adapter) == 0) {
            printk("%s - Failed to find PCI device\n", e1000_driver);
            return (0);
        }

          /* range check the command line parameters for this board */
        if(!e1000_GetBrandingMesg(Adapter->DeviceId, Adapter->SubVendorId, Adapter->SubSystemId)) {
            continue;    
        }    
        printk("%s\n", e1000id_string);
         e1000_check_options(loop_cnt);

    switch (Speed[loop_cnt]) {
    case SPEED_10:
        switch(ForceDuplex[loop_cnt]) {
        case HALF_DUPLEX:
            Adapter->AutoNeg = 0;
            Adapter->ForcedSpeedDuplex = HALF_10;
            break;
        case FULL_DUPLEX:
            Adapter->AutoNeg = 0;
            Adapter->ForcedSpeedDuplex = FULL_10;
            break;
        default:
            Adapter->AutoNeg = 1;
            Adapter->AutoNegAdvertised =
                ADVERTISE_10_HALF | ADVERTISE_10_FULL;
        }
        break;
    case SPEED_100:
        switch(ForceDuplex[loop_cnt]) {
        case HALF_DUPLEX:
            Adapter->AutoNeg = 0;
            Adapter->ForcedSpeedDuplex = HALF_100;
            break;
        case FULL_DUPLEX:
            Adapter->AutoNeg = 0;
            Adapter->ForcedSpeedDuplex = FULL_100;
            break;
        default:
            Adapter->AutoNeg = 1;
            Adapter->AutoNegAdvertised =
                ADVERTISE_100_HALF | ADVERTISE_100_FULL;
        }
        break;
    case SPEED_1000:
        Adapter->AutoNeg = 1;
        Adapter->AutoNegAdvertised = ADVERTISE_1000_FULL;
        break;
    default:
        Adapter->AutoNeg = 1;
        switch(ForceDuplex[loop_cnt]) {
        case HALF_DUPLEX:
            Adapter->AutoNegAdvertised = 
                ADVERTISE_10_HALF | ADVERTISE_100_HALF; 
            break;
        case FULL_DUPLEX:
            Adapter->AutoNegAdvertised = 
                ADVERTISE_10_FULL | ADVERTISE_100_FULL | ADVERTISE_1000_FULL; 
            break;
        default:
            Adapter->AutoNegAdvertised = AutoNeg[loop_cnt];
        }
    }


        Adapter->WaitAutoNegComplete = WaitForLink[loop_cnt];


        /* Set Adapter->MacType */
        switch (pcid->device) {
        case WISEMAN_DEVICE_ID:
            if (Adapter->RevID == WISEMAN_2_0_REV_ID)
                Adapter->MacType = MAC_WISEMAN_2_0;
            else {
                if (Adapter->RevID == WISEMAN_2_1_REV_ID)
                    Adapter->MacType = MAC_WISEMAN_2_1;
                else {
                    Adapter->MacType = MAC_WISEMAN_2_0;
                    printk(KERN_ERR
                           "Could not identify hardware revision\n");
                }
            }
            break;
        case LIVENGOOD_FIBER_DEVICE_ID:
        case LIVENGOOD_COPPER_DEVICE_ID:
            Adapter->MacType = MAC_LIVENGOOD;
            break;
        default:
            Adapter->MacType = MAC_WISEMAN_2_0;
            printk(KERN_ERR "Could not identify hardware revision\n");
            break;
        }

        /* save off the needed information */
        bdp->device = dev;
        dev->priv = bdp;
        Adapter = bdp->bddp;

        /* save off the pci device structure pointer */
        Adapter->pci_dev = pcid;
        bdp->vendor = pcid->vendor;

        /* set the irq into the dev and bdp structures */
        dev->irq = pcid->irq;
        bdp->irq_level = pcid->irq;


        /* point to all of our entry point to let the system know where we are */
        dev->open = &e1000_open;
        dev->hard_start_xmit = &e1000_xmit_frame;
        dev->stop = &e1000_close;
        dev->get_stats = &e1000_get_stats;
        dev->set_multicast_list = &e1000_set_multi;
        dev->set_mac_address = &e1000_set_mac;
        dev->change_mtu = &e1000_change_mtu;
#ifdef IANS
        dev->do_ioctl = &bd_ans_os_Ioctl;
#endif
        /* set memory base addr */
        dev->base_addr = pci_resource_start(pcid, 0);

#ifdef CLICK_POLLING
	/* Click - polling extensions */
	dev->polling = 0;
	dev->rx_poll = e1000_rx_poll;
	dev->rx_refill = e1000_rx_refill;
	dev->tx_eob = e1000_tx_eob;
	dev->tx_clean = e1000_tx_clean;
	dev->tx_queue = e1000_tx_queue;
	dev->tx_start = e1000_tx_start;
	dev->poll_off = e1000_poll_off;
	dev->poll_on = e1000_poll_on;
#endif

        /* now map the phys addr into system space... */
        /*
         * Map the PCI memory base address to a virtual address that can be used
         * for access by the driver. The amount of memory to be mapped will be 
         * the E1000 register area.
         */

        Adapter->HardwareVirtualAddress =
            (PE1000_REGISTERS) ioremap(pci_resource_start(pcid, 0),
                                       sizeof(E1000_REGISTERS));

        if (Adapter->HardwareVirtualAddress == NULL) {
            /* 
             * If the hardware register space can not be allocated, the driver
             * must fail to load.
             */
            printk("e1000_probe ioremap failed\n");

            /* this is a problem, if the first one inits OK but a secondary one
             * fails,  what should you return?  Now it will say the load was OK
             * but one or more boards may have failed to come up
             */

            break;
        }

        bdp->mem_start = pci_resource_start(pcid, 0);

        if (e1000_debug_level >= 2)
            printk("memstart = 0x%p, virt_addr = 0x%p\n",
                   (void *) bdp->mem_start,
                   (void *) Adapter->HardwareVirtualAddress);

        e1000_init(bdp);

        /* Printout the board configuration */
        e1000_print_brd_conf(bdp);

        /* init the basic stats stuff */
        ClearHwStatsCounters(Adapter);
        /* Update the statistics needed by the upper */
        UpdateStatsCounters(bdp);

        /* up the loop count( it's also the number of our boards found) */
        loop_cnt++;

        if (e1000_debug_level >= 2) {
            printk("dev = 0x%p ", dev);
            printk("  priv = 0x%p\n", dev->priv);
            printk("  irq = 0x%x ", dev->irq);
            printk("  next = 0x%p ", dev->next);
            printk("  flags = 0x%x\n", dev->flags);
            printk("  bdp = 0x%p\n", bdp);
            printk("  irq_level = 0x%x\n", bdp->irq_level);
        }
    }                            /* end of pci_find_class while loop */

    e1000boards = num_boards = loop_cnt;

    if (num_boards)
        return (0);
    else
        return (-ENODEV);
}

/* register e1000_probe as our initilization routine */
module_init(e1000_probe);

/* set some of the modules specific things here */
#ifdef MODULE
MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) PRO/1000 Gigabit Ethernet driver");
MODULE_PARM(TxDescriptors, "1-8i");
MODULE_PARM(RxDescriptors, "1-8i");
MODULE_PARM(Jumbo, "1-8i");
MODULE_PARM(WaitForLink, "1-8i");
MODULE_PARM(AutoNeg, "1-8i");
MODULE_PARM(Speed, "1-8i");
MODULE_PARM(ForceDuplex, "1-8i");
MODULE_PARM(SBP, "1-8i");
#endif

/****************************************************************************
* Name:        cleanup_module
*
* Description: This routine is an entry point into the driver.
*
*               This is a Linux required routine.
*
* Author:      IntelCorporation
*
* Born on Date:    07/11/99
*
* Arguments:   
*       NONE
*
* Returns:
*        It returns 0  and can not fail
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
int
cleanup_module(void)
{
    bd_config_t *bdp, *next_bdp;
    PADAPTER_STRUCT Adapter;
    device_t *dev, *next_dev;

    /* start looking at the first device */
    if (e1000first)
        dev = e1000first->device;
    else
        return 0;
    if (e1000_debug_level >= 1)
        printk("cleanup_module: SOR, dev = 0x%p \n\n\n", dev);

    while (dev) {
#ifdef CONFIG_PROC_FS
        e1000_remove_proc_dev(dev);
#endif
        bdp = (bd_config_t *) dev->priv;
        next_bdp = bdp->bd_next;

        if (next_bdp)
            next_dev = next_bdp->device;
        else
            next_dev = NULL;
        Adapter = bdp->bddp;

        /* unregister this instance of the module */
        if (e1000_debug_level >= 2)
            printk("--Cleanup, unreg_netdev\n");
        unregister_netdev(dev);

        /* 
           * Free the memory mapped area that is allocated to the E1000 hardware
           * registers
         */
        if (e1000_debug_level >= 2)
            printk("--Cleanup, iounmap\n");
        iounmap(Adapter->HardwareVirtualAddress);
        /* free the irq back to the system */

#ifdef IANS
        kfree(bdp->iANSdata);
#endif
        /* free up any memory here */
        if (e1000_debug_level >= 2)
            printk("--Cleanup, e1000_dealloc_space\n");
        e1000_dealloc_space(bdp);

        dev = next_dev;
    }

#ifdef CONFIG_PROC_FS
    {
        struct proc_dir_entry   *de;

        /* check if the subdir list is empty before removing e1000_proc_dir */
        for (de = e1000_proc_dir->subdir; de; de = de->next) {
            /* ignore . and .. */
            if (*(de->name) == '.') continue;
            break;
        }
        if (de) return 0;
        remove_proc_entry(ADAPTERS_PROC_DIR, proc_net);
    }
#endif
    
    return (0);
}


/****************************************************************************
* Name:        e1000_check_options
*
* Description: This routine does range checking on command line options.
*
* Author:      IntelCorporation
*
* Born on Date:    03/28/2000
*
* Arguments:   
*        int board - board number to check values for
*
* Returns:
*        None
*
****************************************************************************/
static void
e1000_check_options(int board)
{

    /* Transmit Descriptor Count */
    if (TxDescriptors[board] == -1) {
        TxDescriptors[board] = MAX_TCB;
    } else if ((TxDescriptors[board] > E1000_MAX_TXD) ||
               (TxDescriptors[board] < E1000_MIN_TXD)) {
        printk("Invalid TxDescriptor count specified (%i),"
               " using default of %i\n", TxDescriptors[board], MAX_TCB);
        TxDescriptors[board] = MAX_TCB;
    } else {
        printk("Using specified value of %i TxDescriptors\n",
               TxDescriptors[board]);
    }

    /* Receive Descriptor Count */
    if (RxDescriptors[board] == -1) {
        RxDescriptors[board] = MAX_RFD;
    } else if ((RxDescriptors[board] > E1000_MAX_RXD) ||
               (RxDescriptors[board] < E1000_MIN_RXD)) {
        printk("Invalid RxDescriptor count specified (%i),"
               " using default of %i\n", RxDescriptors[board], MAX_RFD);
        RxDescriptors[board] = MAX_RFD;
    } else {
        printk("Using specified value of %i RxDescriptors\n",
               RxDescriptors[board]);
    }

    /* Jumbo Frame Enable */
    if (Jumbo[board] == -1) {
        Jumbo[board] = 1;
    } else if ((Jumbo[board] > 1) || (Jumbo[board] < 0)) {
        printk("Invalid Jumbo specified (%i), using default of %i\n",
               Jumbo[board], 1);
        Jumbo[board] = 1;
    } else {
        printk("Jumbo Frames %s\n",
               Jumbo[board] == 1 ? "Enabled" : "Disabled");
    }

    /* Wait for link at driver load */
    if (WaitForLink[board] == -1) {
        WaitForLink[board] = 1;
    } else if ((WaitForLink[board] > 1) || (WaitForLink[board] < 0)) {
        printk("Invalid WaitForLink specified (%i), using default of %i\n",
               WaitForLink[board], 1);
        WaitForLink[board] = 1;
    } else {
        printk("WaitForLink %s\n",
               WaitForLink[board] == 1 ? "Enabled" : "Disabled");
    }

     /* Forced Speed and Duplex */
    switch (Speed[board]) {
    case -1:
        Speed[board] = 0;
        switch (ForceDuplex[board]) {
        case -1:
            ForceDuplex[board] = 0;
            break;
        case 0:
            printk("Speed and Duplex Autonegotiation Enabled\n");
            break;
        case 1:
            printk("Warning: Half Duplex specified without Speed\n");
            printk("Using Autonegotiation at Half Duplex only\n");
            break;
        case 2:
            printk("Warning: Full Duplex specified without Speed\n");
            printk("Using Autonegotiation at Full Duplex only\n");
            break;
        default:
            printk("Invalid Duplex Specified (%i), Parameter Ignored\n",
                   ForceDuplex[board]);
            ForceDuplex[board] = 0;
            printk("Speed and Duplex Autonegotiation Enabled\n");
        }
        break;     
    case 0:
        switch (ForceDuplex[board]) {
        case -1:
        case 0:
            printk("Speed and Duplex Autonegotiation Enabled\n");
            ForceDuplex[board] = 0;
            break;
        case 1:
            printk("Warning: Half Duplex specified without Speed\n");
            printk("Using Autonegotiation at Half Duplex only\n");
            break;
        case 2:
            printk("Warning: Full Duplex specified without Speed\n");
            printk("Using Autonegotiation at Full Duplex only\n");
            break;
        default:
            printk("Invalid Duplex Specified (%i), Parameter Ignored\n",
                   ForceDuplex[board]);
            ForceDuplex[board] = 0;
            printk("Speed and Duplex Autonegotiation Enabled\n");
        }
        break;
    case 10:
    case 100:
        switch (ForceDuplex[board]) {
        case -1:
        case 0:
            printk("Warning: %i Mbps Speed specified without Duplex\n",
                   Speed[board]);
            printk("Using Autonegotiation at %i Mbps only\n", Speed[board]);
            ForceDuplex[board] = 0;
            break;
        case 1:
   printk("Forcing to %i Mbps Half Duplex\n", Speed[board]);
            break;
        case 2:
            printk("Forcing to %i Mbps Full Duplex\n", Speed[board]);
            break;
        default:
            printk("Invalid Duplex Specified (%i), Parameter Ignored\n",
                   ForceDuplex[board]);
            ForceDuplex[board] = 0;
            printk("Warning: %i Mbps Speed specified without Duplex\n",
                   Speed[board]);
            printk("Using Autonegotiation at %i Mbps only\n", Speed[board]);
        }
        break;
    case 1000:
        switch (ForceDuplex[board]) {
        case -1:
        case 0:
            printk("Warning: 1000 Mbps Speed specified without Duplex\n");
            printk("Using Autonegotiation at 1000 Mbps Full Duplex only\n");
            ForceDuplex[board] = 0;
            break;
        case 1:
            printk("Warning: Half Duplex is not supported at 1000 Mbps\n");
            printk("Using Autonegotiation at 1000 Mbps Full Duplex only\n");
            break;
        case 2:
            printk("Using Autonegotiation at 1000 Mbps Full Duplex only\n");
            break;
        default:
            printk("Invalid Duplex Specified (%i), Parameter Ignored\n",
                   ForceDuplex[board]);
            ForceDuplex[board] = 0;
            printk("Warning: 1000 Mbps Speed specified without Duplex\n");
            printk("Using Autonegotiation at 1000 Mbps Full Duplex only\n");
        }
        break;
    default:
        printk("Invalid Speed Specified (%i), Parameter Ignored\n",
               Speed[board]);
        Speed[board] = 0;
        switch (ForceDuplex[board]) {
        case -1:
        case 0:
            printk("Speed and Duplex Autonegotiation Enabled\n");
            ForceDuplex[board] = 0;
            break;
        case 1:
            printk("Warning: Half Duplex specified without Speed\n");
            printk("Using Autonegotiation at Half Duplex only\n");
            break;
        case 2:
            printk("Warning: Full Duplex specified without Speed\n");
            printk("Using Autonegotiation at Full Duplex only\n");
            break;
        default:
            printk("Invalid Duplex Specified (%i), Parameter Ignored\n",
                   ForceDuplex[board]);
            ForceDuplex[board] = 0;
            printk("Speed and Duplex Autonegotiation Enabled\n");
        }
    }

    if (AutoNeg[board] == -1) {
        AutoNeg[board] = 0x2F;
    } else { 
        if (AutoNeg[board] & ~0x2F) {
            printk("Invalid AutoNeg Specified (0x%X)\n", AutoNeg[board]);
            AutoNeg[board] = 0x2F;
        }
        printk("AutoNeg Advertising ");
        if(AutoNeg[board] & 0x20) {
            printk("1000/FD");
            if(AutoNeg[board] & 0x0F)
                printk(", ");
        }
        if(AutoNeg[board] & 0x08) {
            printk("100/FD");
            if(AutoNeg[board] & 0x07)
                printk(", ");
        }
        if(AutoNeg[board] & 0x04) {
            printk("100/HD");
            if(AutoNeg[board] & 0x03)
                printk(", ");
        }
        if(AutoNeg[board] & 0x02) {
            printk("10/FD");
            if(AutoNeg[board] & 0x01)
                printk(", ");
        }
        if(AutoNeg[board] & 0x01)
            printk("10/HD");
        printk("\n");
    }
}

/****************************************************************************
* Name:        e1000_open
*
* Description: This routine is the open call for the interface.
*
*               This is a Linux required routine.
*
* Author:      IntelCorporation
*
* Born on Date:    07/11/99
*
* Arguments:   
*       NONE
*
* Returns:
*        It returns 0 on success 
*         -EAGAIN on failure
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static int
e1000_open(device_t * dev)
{
    bd_config_t *bdp;
    PADAPTER_STRUCT Adapter = 0;
    int ret_val;
    printk("v0 e1000 Alignment: %p %p\n", 
	   &(Adapter->FirstTxDescriptor), &(Adapter->NumRxDescriptors));

    bdp = dev->priv;
    Adapter = bdp->bddp;

    if (e1000_debug_level >= 1)
        printk("open: SOR, bdp = 0x%p\n", bdp);

    /* make sure we have not already opened this interface */
    if(bdp->flags & BOARD_OPEN)
        return -EBUSY;
    
    if (e1000_init(bdp)) {
        return -ENOMEM;
    }
    if (e1000_runtime_init(bdp)) {
        return -ENOMEM;
    }
    Adapter->AdapterStopped = FALSE;
   
#ifdef IANS_BASE_VLAN_TAGGING
    /* on a close a global reset is issued to the hardware, 
     * so VLAN settings are lost and need to be re-set on open */
    if((IANS_BD_TAGGING_MODE)ANS_PRIVATE_DATA_FIELD(bdp)->tag_mode != IANS_BD_TAGGING_NONE)
        bd_ans_hw_EnableVLAN(bdp);
#endif
       
    if (request_irq(dev->irq, &e1000_intr, SA_SHIRQ, "e1000", dev)) {
        if (e1000_debug_level >= 1)
            printk("open: request_irq failed");

        return (-EAGAIN);
    }

    /* Check to see if promiscuous mode needs to be turned on */
    if (dev->flags & IFF_PROMISC) {
        /* turn  promisc mode on */
        ret_val = e1000_set_promisc(bdp, B_TRUE);
        bdp->flags |= PROMISCUOUS;
    } else {
        /* turn  promisc mode off */
        ret_val = e1000_set_promisc(bdp, B_FALSE);
        bdp->flags &= ~PROMISCUOUS;
    }

#ifdef MODULE
    /* up the mod use count used by the system */
    MOD_INC_USE_COUNT;
#endif

    /* setup and start the watchdog timer */
    init_timer(&bdp->timer_id);

    /* set the timer value for 2 sec( i.e. 200 10msec tics ) 
     * jiffies are mesured in tics and is equiv. to LBOLTS in Unix
     */
    bdp->timer_id.expires = bdp->timer_val = jiffies + 200;
    bdp->timer_id.data = (ulong_t) dev;
    bdp->timer_id.function = (void *) &e1000_watchdog;

    /* start the timer */
    add_timer(&bdp->timer_id);

    /* set the device flags */
    netif_start_queue(dev);

    /* enable interrupts */
    e1000EnableInterrupt(Adapter);

    /* init the basic stats stuff */
    ClearHwStatsCounters(Adapter);

    bdp->flags |= BOARD_OPEN;
    return (0);
}

/****************************************************************************
* Name:        e1000_close
*
* Description: This routine is an entry point into the driver.
*
*               This is a Linux required routine.
*
* Author:      IntelCorporation
*
* Born on Date:    07/11/99
*
* Arguments:   
*         device_t pointer
*
* Returns:
*        It returns 0 and can not fail.
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static int
e1000_close(device_t * dev)
{
    bd_config_t *bdp;
    PADAPTER_STRUCT Adapter;
    ushort_t status;
    int j;

    bdp = dev->priv;
    Adapter = bdp->bddp;

    /* set the device to not started */

    netif_stop_queue(dev);
    /* stop the hardware */

    /* Disable all possible interrupts */
    E1000_WRITE_REG(Imc, (0xffffffff));
    status = E1000_READ_REG(Icr);

    /* Reset the chip */
    AdapterStop(Adapter);

    /* kill the timer */
    del_timer(&bdp->timer_id);

    /* free the irq back to the system */
    if (e1000_debug_level >= 1)
        printk("E1000: close: free_irq\n");
    free_irq(dev->irq, dev);

    /*
     * Free up the transmit descriptor area 
     */
    if (e1000_debug_level >= 2)
        printk("--Cleanup, free tx descriptor area\n");
    free_contig(bdp->base_tx_tbds);
    bdp->base_tx_tbds = NULL;

    if(Adapter->TxSkBuffs)
      free_contig(Adapter->TxSkBuffs);

    /* 
     *  Free up the RX_SW_PACKET area also free any allocated 
     *  receive buffers
     */
    if (e1000_debug_level >= 2)
        printk("--Cleanup, free rx packet area + skbuffs\n");
    if(Adapter->RxSkBuffs){
        for (j = 0; j < Adapter->NumRxDescriptors; j++) {
            if (Adapter->RxSkBuffs[j]){
                if (e1000_debug_level >= 2)
                    printk(" -- kfree_skb\n");
                dev_kfree_skb(Adapter->RxSkBuffs[j]);
                Adapter->RxSkBuffs[j] = 0;
            }
        }
        free_contig(Adapter->RxSkBuffs);
    }

    /*
     * Free the receive descriptor area 
     */
    if (e1000_debug_level >= 2)
        printk("--Cleanup, free rx descriptor area\n");
    /* free_contig( Adapter->e1000_rbd_data ); */
    free_contig(bdp->base_rx_rbds);
    bdp->base_rx_rbds = NULL;
    
    bdp->flags &= ~BOARD_OPEN;

#ifdef MODULE
    /* adjust the mod use count */
    MOD_DEC_USE_COUNT;
#endif

    return (0);
}

/*
 * the send a packet, may poke at e1000 to force it to start tx
 */
  
static int
e1000_xmit_frame_aux(struct sk_buff *skb, device_t * dev, int poke)
{
    bd_config_t *bdp;
    PADAPTER_STRUCT Adapter;
    int lock_flag;
    int ret;

    bdp = dev->priv;
    Adapter = (PADAPTER_STRUCT) bdp->bddp;

    if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) {
      return 1;
    }

    if (e1000_debug_level >= 3)
        printk("e1000_tx_frame\n");

    /* call the transmit routine */
#ifdef CLICK_POLLING
    if(SendBuffer(skb, bdp, poke, dev->polling)){
#else
    if(SendBuffer(skb, bdp, poke, 0)){
#endif
      ret = 0;
    } else {
#ifdef IANS
      if(bdp->iANSdata->iANS_status == IANS_COMMUNICATION_UP) {
        ans_notify(dev, IANS_IND_XMIT_QUEUE_FULL);
      }
#endif
      ret = 1;
    }

    if(bdp->tx_out_res == 0)
      clear_bit(0, (void*)&dev->tbusy);

    return (ret);
}

/****************************************************************************
* Name:        e1000_xmit_frame
*
* Description: This routine is called to transmit a frame.
*
*
* Author:      IntelCorporation
*
* Born on Date:    07/11/99
*
* Arguments:   
*         sb_buff   pointer
*         device_t pointer
*
* Returns:
*        It returns B_FALSE on success
*         B_TRUE on failure
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static int
e1000_xmit_frame(struct sk_buff *skb, device_t * dev)
{
  return e1000_xmit_frame_aux(skb, dev, 1);
}

/****************************************************************************
* Name:       SendBuffer
*
* Description: This routine physically sends the packet to the nic controller.
*
*
* Author:      IntelCorporation
*
* Born on Date:    07/11/99
*
* Arguments:   
*         TX_SW_PACKET   pointer
*         bd_config_t      pointer
*
* Returns:
*        It returns B_TRUE always and can not fail.
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static UINT
SendBuffer(struct sk_buff *skb, bd_config_t * bdp, int poke, int polling)
{
    PADAPTER_STRUCT Adapter;
    PE1000_TRANSMIT_DESCRIPTOR CurrentTxDescriptor, nxt;
    // net_device_stats_t *stats;
    int di;

    Adapter = bdp->bddp;
    // stats = &bdp->net_stats;

    CurrentTxDescriptor = Adapter->NextAvailTxDescriptor;

    /* Don't use the last descriptor! */
    if (CurrentTxDescriptor == Adapter->LastTxDescriptor)
      nxt = Adapter->FirstTxDescriptor;
    else
      nxt = CurrentTxDescriptor + 1;
    if(nxt == Adapter->OldestUsedTxDescriptor){
      printk("e1000: out of descs in Sendbuffer\n");
      return(0);
    }

    di = CurrentTxDescriptor - Adapter->FirstTxDescriptor;
    if(Adapter->TxSkBuffs[di])
      printk("e1000 oops di %d TxSkBuffs[di] %x\n",
             di,
             (di >= 0 && di < 80) ? Adapter->TxSkBuffs[di] : 0);
    Adapter->TxSkBuffs[di] = skb;

    CurrentTxDescriptor->BufferAddress = virt_to_bus(skb->data);
    
    CurrentTxDescriptor->Lower.DwordData = skb->len;

    /* zero out the status field in the descriptor. */
    CurrentTxDescriptor->Upper.DwordData = 0;

#ifdef IANS
    if(bdp->iANSdata->iANS_status == IANS_COMMUNICATION_UP) {
        if(bd_ans_os_Transmit(bdp, CurrentTxDescriptor, &skb)==BD_ANS_FAILURE) {
            dev_kfree_skb(skb);
            return B_FALSE;
        }
    }
#endif 

    Adapter->NextAvailTxDescriptor = nxt;

    CurrentTxDescriptor->Lower.DwordData |=
      (E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS);

#if 1
    /*
     * If there is a valid value for the transmit interrupt delay, set up the
     * delay in the descriptor field
     */
    if (Adapter->TxIntDelay)
      CurrentTxDescriptor->Lower.DwordData |= E1000_TXD_CMD_IDE;
#else
    /*
     * Ask for a transmit complete interrupt every 60 packets. RTM
     * This seems to be broken -- sometimes the tx complete
     * interrupts never happen -- sending waits until a receive
     * packet arrives. RTM Dec 22 2000.
     */
    if(polling==0 && Adapter->TxIntDelay){
      static int dctr;
      if(dctr++ > 60){
        dctr = 0;
        /* Don't delay for this packet! */
      } else {
        /* Delay tx complete interrupt for most packets. */
        CurrentTxDescriptor->Lower.DwordData |= E1000_TXD_CMD_IDE;
      }
    }
#endif

    /* Set the RS or the RPS bit by looking at the ReportTxEarly setting */
    if (Adapter->ReportTxEarly == 1)
        CurrentTxDescriptor->Lower.DwordData |= E1000_TXD_CMD_RS;
    else
        CurrentTxDescriptor->Lower.DwordData |= E1000_TXD_CMD_RPS;

    if (poke)
      /* Advance the Transmit Descriptor Tail (Tdt), this tells the 
       * E1000 that this frame is available to transmit. 
       */
      E1000_WRITE_REG(Tdt, (((unsigned long) Adapter->NextAvailTxDescriptor -
                             (unsigned long) Adapter->FirstTxDescriptor) >> 4));

    /* Could we queue another packet? */
    if (Adapter->NextAvailTxDescriptor == Adapter->LastTxDescriptor)
      nxt = Adapter->FirstTxDescriptor;
    else
      nxt = Adapter->NextAvailTxDescriptor + 1;
    if(nxt == Adapter->OldestUsedTxDescriptor)
      bdp->tx_out_res = 1;

    return(1);
}

/****************************************************************************
* Name:        e1000_get_stats
*
* Description: This routine is called when the OS wants the nic stats returned
*
* Author:      IntelCorporation
*
* Born on Date:    7/12/99
*
* Arguments:   
*        device_t dev         - the device stucture to return stats on
*
* Returns:
*         the address of the net_device_stats stucture for the device
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static struct net_device_stats *
e1000_get_stats(device_t * dev)
{
    bd_config_t *bdp = dev->priv;

    /* Statistics are updated from the watchdog - so just return them now */
    return (&bdp->net_stats);
}


/* this routine is to change the MTU size for jumbo frames */
/****************************************************************************
* Name:        e1000_change_mtu
*
* Description: This routine is called when the OS would like the driver to
*               change the MTU size.  This is used for jumbo frame support.
*
* Author:      IntelCorporation
*
* Born on Date:    7/12/98
*
* Arguments:   
*            device_t   pointer    -   pointer to the device
*            int               -   the new MTU size 
*
* Returns:
*       ???? 
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static int
e1000_change_mtu(device_t * dev, int new_mtu)
{
    bd_config_t *bdp;
    PADAPTER_STRUCT Adapter;

    bdp = (bd_config_t *) dev->priv;
    Adapter = bdp->bddp;

    if ((new_mtu < MINIMUM_ETHERNET_PACKET_SIZE - ENET_HEADER_SIZE) ||
        (new_mtu > MAX_JUMBO_FRAME_SIZE - ENET_HEADER_SIZE))
        return -EINVAL;

    if (new_mtu <= MAXIMUM_ETHERNET_PACKET_SIZE - ENET_HEADER_SIZE) {
        /* 802.x legal frame sizes */
        Adapter->LongPacket = FALSE;
        if (Adapter->RxBufferLen != E1000_RXBUFFER_2048) {
            Adapter->RxBufferLen = E1000_RXBUFFER_2048;
            if (dev->flags & IFF_UP) {
                e1000_close(dev);
                e1000_open(dev);
            }
        }
    } else if (Adapter->MacType < MAC_LIVENGOOD) {
        /* Jumbo frames not supported on 82542 hardware */
        printk("e1000: Jumbo frames not supported on 82542\n");
        return -EINVAL;
    } else if (Jumbo[Adapter->bd_number] != 1) {
        printk("e1000: Jumbo frames disabled\n");
        return -EINVAL;
    } else if (new_mtu <= (4096 - 256) - ENET_HEADER_SIZE) {
        /* 4k buffers */
        Adapter->LongPacket = TRUE;
        if (Adapter->RxBufferLen != E1000_RXBUFFER_4096) {
            Adapter->RxBufferLen = E1000_RXBUFFER_4096;
            if (dev->flags & IFF_UP) {
                e1000_close(dev);
                e1000_open(dev);

            }
        }
    } else if (new_mtu <= (8192 - 256) - ENET_HEADER_SIZE) {
        /* 8k buffers */
        Adapter->LongPacket = TRUE;
        if (Adapter->RxBufferLen != E1000_RXBUFFER_8192) {
            Adapter->RxBufferLen = E1000_RXBUFFER_8192;
            if (dev->flags & IFF_UP) {
                e1000_close(dev);
                e1000_open(dev);
            }
        }
    } else {
        /* 16k buffers */
        Adapter->LongPacket = TRUE;
        if (Adapter->RxBufferLen != E1000_RXBUFFER_16384) {
            Adapter->RxBufferLen = E1000_RXBUFFER_16384;
            if (dev->flags & IFF_UP) {
                e1000_close(dev);
                e1000_open(dev);
            }
        }
    }
    dev->mtu = new_mtu;
    return 0;
}

/****************************************************************************
* Name:        e1000_init
*
* Description: This routine is called when this driver is loaded. This is
*        the initialization routine which allocates memory, starts the
*        watchdog, & configures the adapter, determines the system
*        resources.
*
* Author:      IntelCorporation
*
* Born on Date:    1/18/98
*
* Arguments:   
*        NONE
*
* Returns:
*       NONE 
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static int
e1000_init(bd_config_t * bdp)
{
    PADAPTER_STRUCT Adapter;
    device_t *dev;
    uint16_t LineSpeed, FullDuplex;

    if (e1000_debug_level >= 1)
        printk("e1000_init()\n");

    dev = bdp->device;
    Adapter = (PADAPTER_STRUCT) bdp->bddp;

    /*
     * Disable interrupts on the E1000 card 
     */
    e1000DisableInterrupt(Adapter);

   /**** Reset and Initialize the E1000 *******/
    AdapterStop(Adapter);
    Adapter->AdapterStopped = FALSE;

    /* Validate the EEPROM */
    if (!ValidateEepromChecksum(Adapter)) {
        printk("e1000: The EEPROM checksum is not valid \n");
        return (1);
    }

    /* read the ethernet address from the eprom */
    ReadNodeAddress(Adapter, &Adapter->perm_node_address[0]);

    if (e1000_debug_level >= 2) {
        printk("Node addr is: ");
        printk("%x:", Adapter->perm_node_address[0]);
        printk("%x:", Adapter->perm_node_address[1]);
        printk("%x:", Adapter->perm_node_address[2]);
        printk("%x:", Adapter->perm_node_address[3]);
        printk("%x:", Adapter->perm_node_address[4]);
        printk("%x\n ", Adapter->perm_node_address[5]);
    }

    /* save off the perm node addr in the bdp */
    memcpy(bdp->eaddr.bytes, &Adapter->perm_node_address[0],
           DL_MAC_ADDR_LEN);

    /* tell the system what the address is... */
    memcpy(&dev->dev_addr[0], &Adapter->perm_node_address[0],
           DL_MAC_ADDR_LEN);

    /* Scan the chipset and determine whether to set the RS bit or
     * the RPS bit during transmits. On some systems with a fast chipset
     * (450NX), setting the RS bit may cause data corruption. Check the
     * space.c paratemer to see if the user has forced this setting or 
     * has let the software do the detection.
     */

    if ((e1000_ReportTxEarly == 0) || (e1000_ReportTxEarly == 1))
        Adapter->ReportTxEarly = e1000_ReportTxEarly;    /* User setting */
    else {                        /* let the software setect the chipset */
        if(Adapter->MacType < MAC_LIVENGOOD) {
            if (DetectKnownChipset(Adapter) == B_TRUE)
                Adapter->ReportTxEarly = 1;    /* Set the RS bit */
            else
                Adapter->ReportTxEarly = 0;    /* Set the RPS bit */
        } else
            Adapter->ReportTxEarly = 1;
    }


    Adapter->FlowControl = e1000_flow_ctrl;
    Adapter->RxPciPriority = e1000_rxpci_priority;

    /* Do the adapter initialization */
    if (!InitializeHardware(Adapter)) {
        printk("InitializeHardware Failed\n");
        return (1);
    }
    
    /* all initialization done, mark board as present */
    bdp->flags = BOARD_PRESENT;

    CheckForLink(Adapter);
    if(E1000_READ_REG(Status) & E1000_STATUS_LU) {
        Adapter->LinkIsActive = TRUE;
        GetSpeedAndDuplex(Adapter, &LineSpeed, &FullDuplex);
        Adapter->cur_line_speed = (uint32_t) LineSpeed;
        Adapter->FullDuplex = (uint32_t) FullDuplex;
#ifdef IANS
        Adapter->ans_link = IANS_STATUS_LINK_OK;
        Adapter->ans_speed = (uint32_t) LineSpeed;
        Adapter->ans_duplex = FullDuplex == FULL_DUPLEX ? 
            BD_ANS_DUPLEX_FULL : BD_ANS_DUPLEX_HALF;
#endif
    } else {
        Adapter->LinkIsActive = FALSE;
        Adapter->cur_line_speed = 0;
        Adapter->FullDuplex = 0;
#ifdef IANS
          Adapter->ans_link = IANS_STATUS_LINK_FAIL;
    Adapter->ans_speed = 0;
    Adapter->ans_duplex = 0;
#endif
    }

    if (e1000_debug_level >= 1)
        printk("e1000_init: end\n");

    return (0);
}

static int
e1000_runtime_init(bd_config_t * bdp)
{
    PADAPTER_STRUCT Adapter;
    device_t *dev;

    if (e1000_debug_level >= 1)
        printk("e1000_init()\n");

    dev = bdp->device;

    Adapter = (PADAPTER_STRUCT) bdp->bddp; /* Setup Shared Memory Structures */

    /* Make sure RxBufferLen is set to something */
    if (Adapter->RxBufferLen == 0) {
        Adapter->RxBufferLen = E1000_RXBUFFER_2048;
        Adapter->LongPacket = FALSE;
    }

    if (!e1000_sw_init(bdp)) {
        /*  Board is disabled because all memory structures
         *  could not be allocated
         */
        printk
            ("%s - Could not allocate the software mem structures\n",
             e1000_driver);
        bdp->flags = BOARD_DISABLED;
        return (1);
    }

    /* Setup and initialize the transmit structures. */
    SetupTransmitStructures(Adapter, B_TRUE);

    /* Setup and initialize the receive structures -- we can receive packets
     * off of the wire 
     */
    SetupReceiveStructures(bdp, TRUE, TRUE);

    return 0;
}

/****************************************************************************
* Name:        e1000_set_mac
*
* Description: This routine sets the ethernet address of the board
*
* Author:      IntelCorporation
*
* Born on Date:    07/11/99
*
* Arguments:   
*      bdp    - Ptr to this card's bd_config_t structure
*      eaddrp - Ptr to the new ethernet address
*
* Returns:
*      1  - If successful
*      0  - If not successful
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static int
e1000_set_mac(device_t * dev, void *p)
{

    bd_config_t *bdp;
    uint32_t HwLowAddress = 0;
    uint32_t HwHighAddress = 0;
    uint32_t RctlRegValue;
    uint16_t PciCommandWord;
    PADAPTER_STRUCT Adapter;
    uint32_t IntMask;

    struct sockaddr *addr = p;

    if (e1000_debug_level >= 1)
        printk("set_eaddr()\n");

    bdp = dev->priv;
    Adapter = bdp->bddp;

    RctlRegValue = E1000_READ_REG(Rctl);

    /* 
     * setup the MAC address by writing to RAR0 
     */

    if (Adapter->MacType == MAC_WISEMAN_2_0) {

        /* if MWI was enabled then dis able it before issueing the receive
           * reset to the hardware. 
         */
        if (Adapter->PciCommandWord && CMD_MEM_WRT_INVALIDATE) {
            PciCommandWord =
                Adapter->PciCommandWord & ~CMD_MEM_WRT_INVALIDATE;

            WritePciConfigWord(PCI_COMMAND_REGISTER, &PciCommandWord);
        }

        /* reset receiver */
        E1000_WRITE_REG(Rctl, E1000_RCTL_RST);

        DelayInMilliseconds(5);    /* Allow receiver time to go in to reset */
    }

    memcpy(Adapter->CurrentNetAddress, addr->sa_data, DL_MAC_ADDR_LEN);

   /******************************************************************
    ** Setup the receive address (individual/node/network address).
    ******************************************************************/

    if (e1000_debug_level >= 2)
        printk("Programming IA into RAR[0]\n");

    HwLowAddress = (Adapter->CurrentNetAddress[0] |
                    (Adapter->CurrentNetAddress[1] << 8) |
                    (Adapter->CurrentNetAddress[2] << 16) |
                    (Adapter->CurrentNetAddress[3] << 24));

    HwHighAddress = (Adapter->CurrentNetAddress[4] |
                     (Adapter->CurrentNetAddress[5] << 8) | E1000_RAH_AV);

    E1000_WRITE_REG(Rar[0].Low, HwLowAddress);
    E1000_WRITE_REG(Rar[0].High, HwHighAddress);

    memcpy(bdp->eaddr.bytes, addr->sa_data, DL_MAC_ADDR_LEN);
    memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);

    if (Adapter->MacType == MAC_WISEMAN_2_0) {

      /******************************************************************
       ** Take the receiver out of reset.
       ******************************************************************/

        E1000_WRITE_REG(Rctl, 0);

        DelayInMilliseconds(1);

        /* if MWI was enabled then reenable it after issueing the global
         * or receive reset to the hardware. 
         */

        if (Adapter->PciCommandWord && CMD_MEM_WRT_INVALIDATE) {
            WritePciConfigWord(PCI_COMMAND_REGISTER,
                               &Adapter->PciCommandWord);
        }

        IntMask = E1000_READ_REG(Ims);
        e1000DisableInterrupt(Adapter);

        /* Enable receiver */
        SetupReceiveStructures(bdp, FALSE, FALSE);

        E1000_WRITE_REG(Ims, IntMask);
        /* e1000EnableInterrupt( Adapter ); */
    }

    return (0);
}


/****************************************************************************
* Name:        e1000_print_brd_conf
*
* Description: This routine printd the board configuration.
*
* Author:      IntelCorporation
*
* Born on Date:    7/24/97
*
* Arguments:   
*      bdp    - Ptr to this card's DL_bdconfig structure
*
* Returns:
*      NONE
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static void
e1000_print_brd_conf(bd_config_t * bdp)
{

    PADAPTER_STRUCT Adapter = (PADAPTER_STRUCT) bdp->bddp;

    if(Adapter->LinkIsActive == TRUE)
        printk("%s: Mem:0x%p  IRQ:%d  Speed:%ld Mbps  Dx:%s FlowCtl:%02x\n\n",
               bdp->device->name, (void *) bdp->mem_start,
               bdp->irq_level, Adapter->cur_line_speed,
               Adapter->FullDuplex == FULL_DUPLEX ? "Full" : "Half",
               Adapter->FlowControl);
    else 
        printk("%s: Mem:0x%p  IRQ:%d  Speed:N/A  Dx:N/A\n\n", 
               bdp->device->name, (void *) bdp->mem_start, bdp->irq_level);
}

/*****************************************************************************
* Name:        SetupTransmitStructures
*
* Description: This routine initializes all of the transmit related
*              structures.  This includes the Transmit descriptors 
*              and the TX_SW_PACKETs structures.
*
*              NOTE -- The device must have been reset before this routine
*                      is called.
*
* Author:      IntelCorporation
*
* Born on Date:    6/14/97
*
* Arguments:
*      Adapter - A pointer to our context sensitive "Adapter" structure.
*      DebugPrint - print debug or not.  ( not used in this driver )
*
*
* Returns:
*      (none)
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/

static void
SetupTransmitStructures(PADAPTER_STRUCT Adapter, boolean_t DebugPrint)
{

    UINT i;

    if (e1000_debug_level >= 1)
        printk("SetupTransmitStructures\n");

   /**********************************************************************
    * Setup  TxSwPackets
    **********************************************************************/

    /* 
     * The transmit algorithm parameters like the append size
     * and copy size  which are used for the transmit algorithm and
     * are configurable. 
     */
    Adapter->TxIntDelay = e1000_txint_delay;

   /**************************************************
    *        Setup TX Descriptors
    ***************************************************/

    /* Initialize all of the Tx descriptors to zeros */
    memset((PVOID) Adapter->FirstTxDescriptor, 0,
           (sizeof(E1000_TRANSMIT_DESCRIPTOR)) *
           Adapter->NumTxDescriptors);

    /* Setup TX descriptor pointers */
    Adapter->NextAvailTxDescriptor = Adapter->FirstTxDescriptor;
    Adapter->OldestUsedTxDescriptor = Adapter->FirstTxDescriptor;

    /* Setup the Transmit Control Register (TCTL). */
    if (Adapter->FullDuplex) {
        E1000_WRITE_REG(Tctl, (E1000_TCTL_PSP | E1000_TCTL_EN |
                               (E1000_COLLISION_THRESHOLD <<
                                E1000_CT_SHIFT) |
                               (E1000_FDX_COLLISION_DISTANCE <<
                                E1000_COLD_SHIFT)));
    } else {
        E1000_WRITE_REG(Tctl, (E1000_TCTL_PSP | E1000_TCTL_EN |
                               (E1000_COLLISION_THRESHOLD <<
                                E1000_CT_SHIFT) |
                               (E1000_HDX_COLLISION_DISTANCE <<
                                E1000_COLD_SHIFT)));
    }

   /***********************************************************
    *   Setup Hardware TX Registers 
    ************************************************************/

    /* Setup HW Base and Length of Tx descriptor area */
    E1000_WRITE_REG(Tdbal,
                    virt_to_bus((void *) Adapter->FirstTxDescriptor));
    E1000_WRITE_REG(Tdbah, 0);

    E1000_WRITE_REG(Tdl, (Adapter->NumTxDescriptors *
                          sizeof(E1000_TRANSMIT_DESCRIPTOR)));

    /* Setup our HW Tx Head & Tail descriptor pointers */
    E1000_WRITE_REG(Tdh, 0);
    E1000_WRITE_REG(Tdt, 0);


    /* Zero out the Tx Queue State registers -- we don't use this mechanism. */
    if (Adapter->MacType < MAC_LIVENGOOD) {
        E1000_WRITE_REG(Tqsal, 0);
        E1000_WRITE_REG(Tqsah, 0);
    }
    /* Set the Transmit IPG register with default values.
     * Three values are used to determine when we transmit a packet on the 
     * wire: IPGT, IPGR1, & IPGR2.  IPGR1 & IPGR2 have no meaning in full 
     * duplex. Due to the state machine implimentation all values are 
     * effectivly 2 higher i.e. a setting of 10 causes the hardware to 
     * behave is if it were set to 1
     *  2. These settigs are in "byte times".  For example, an IPGT setting
     * of 10 plus the state machine delay of 2 is 12 byte time = 96 bit 
     * times. 
     */

    /* Set the Transmit IPG register with default values. */
    switch (Adapter->MacType) {
    case MAC_LIVENGOOD:
        if(Adapter->MediaType == MEDIA_TYPE_FIBER) {
            E1000_WRITE_REG(Tipg, DEFAULT_LVGD_TIPG_IPGT_FIBER |
                                  (DEFAULT_LVGD_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT) |
                                  (DEFAULT_LVGD_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT));
        } else {
            E1000_WRITE_REG(Tipg, DEFAULT_LVGD_TIPG_IPGT_COPPER |
                                  (DEFAULT_LVGD_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT) |
                                  (DEFAULT_LVGD_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT));
        }
           break;
    case MAC_WISEMAN_2_0:
    case MAC_WISEMAN_2_1:
    default:
        E1000_WRITE_REG(Tipg, DEFAULT_WSMN_TIPG_IPGT |
                              (DEFAULT_WSMN_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT) |
                              (DEFAULT_WSMN_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT));
        break;
    }
    /*
     * Set the Transmit Interrupt Delay register with the vaule for the 
     * transmit interrupt delay
     */
    E1000_WRITE_REG(Tidv, Adapter->TxIntDelay);
}

/*****************************************************************************
* Name:        SetupReceiveStructures
*
* Description: This routine initializes all of the receive related
*              structures.  This includes the receive descriptors, the
*              actual receive buffers, and the RX_SW_PACKET software structures.
*
*              NOTE -- The device must have been reset before this routine
*                      is called.
*
* Author:      IntelCorporation
*
* Born on Date:    6/27/97
*
* Arguments:
*      Adapter - A pointer to our context sensitive "Adapter" structure.
*
*      DebugPrint - A variable that indicates whether a "debug" version of
*          the driver should print debug strings to the terminal.
*
*      flag - indicates if the driver should indicate link
* Returns:
*      (none)
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/
static int
SetupReceiveStructures(bd_config_t *bdp, boolean_t DebugPrint,
                       boolean_t flag)
{
    PE1000_RECEIVE_DESCRIPTOR RxDescriptorPtr;
    UINT i;
    PADAPTER_STRUCT Adapter = bdp->bddp;
    uint32_t RegRctl = 0;

    if (e1000_debug_level >= 1)
        printk("SetupReceiveStructures\n");

    /*
     * Set the value of the maximum number of packets that will be processed
     * in the interrupt context from the file space.c
     */
    Adapter->MaxNumReceivePackets = RxDescriptors[Adapter->bd_number];;

    /*
     * Set the Receive interrupt delay and also the maximum number of times 
     * the transmit and receive interrupt are going to be processed from the
     * space.c file
     */
    Adapter->RxIntDelay = e1000_rxint_delay;
    Adapter->MaxDpcCount = e1000_maxdpc_count;

    /* Initialize all of the Rx descriptors to zeros */
    memset((PVOID) Adapter->FirstRxDescriptor, 0,
           (sizeof(E1000_RECEIVE_DESCRIPTOR)) * Adapter->NumRxDescriptors);

    for (i = 0, RxDescriptorPtr = Adapter->FirstRxDescriptor;
         i < Adapter->NumRxDescriptors;
         i++, RxDescriptorPtr++) {

        if (Adapter->RxSkBuffs[i] == NULL)
            printk
                ("SetupReceiveStructures rcv buffer memory not allocated");
        else {
            PVOID va = Adapter->RxSkBuffs[i]->tail;
            RxDescriptorPtr->BufferAddress = 0;
            RxDescriptorPtr->BufferAddress += virt_to_bus(va);
        }
    }


    /* Setup our descriptor pointers */
    Adapter->NextRxDescriptorToCheck = Adapter->FirstRxDescriptor;
    Adapter->NextRxIndexToFill = 0;

    /*
     * Set up all the RCTL fields
     */
    E1000_WRITE_REG(Rctl, 0);

    E1000_WRITE_REG(Rdtr0, (Adapter->RxIntDelay | E1000_RDT0_FPDB));

    /* Setup HW Base and Length of Rx descriptor area */
    E1000_WRITE_REG(Rdbal0,
                    virt_to_bus((void *) Adapter->FirstRxDescriptor));
    E1000_WRITE_REG(Rdbah0, 0);

    E1000_WRITE_REG(Rdlen0, (Adapter->NumRxDescriptors *
                             sizeof(E1000_RECEIVE_DESCRIPTOR)));

    /* Setup our HW Rx Head & Tail descriptor pointers */
    E1000_WRITE_REG(Rdh0, 0);
    E1000_WRITE_REG(Rdt0,
                    (((unsigned long) Adapter->LastRxDescriptor -
                      (unsigned long) Adapter->FirstRxDescriptor) >> 4));

    /* Zero out the registers associated with the second receive descriptor
     * ring, because we don't use that ring.
     */
    if (Adapter->MacType < MAC_LIVENGOOD) {
        E1000_WRITE_REG(Rdbal1, 0);
        E1000_WRITE_REG(Rdbah1, 0);
        E1000_WRITE_REG(Rdlen1, 0);
        E1000_WRITE_REG(Rdh1, 0);
        E1000_WRITE_REG(Rdt1, 0);
    }
    /* Setup the Receive Control Register (RCTL), and ENABLE the receiver.
     * The initial configuration is to: Enable the receiver, accept
     * broadcasts, discard bad packets (and long packets), disable VLAN filter
     * checking, set the receive descriptor minimum threshold size to 1/2,
     * and the receive buffer size to 2k. */

    RegRctl = E1000_RCTL_EN |         /* Enable Receive Unit */
              E1000_RCTL_BAM |        /* Accept Broadcast Packets */
              (Adapter->MulticastFilterType << E1000_RCTL_MO_SHIFT) |
              E1000_RCTL_RDMTS0_HALF |
              E1000_RCTL_LBM_NO;      /* Loopback Mode = none */

    switch (Adapter->RxBufferLen) {
    case E1000_RXBUFFER_2048:
    default:
        RegRctl |= E1000_RCTL_SZ_2048;
        break;
    case E1000_RXBUFFER_4096:
        RegRctl |= E1000_RCTL_SZ_4096 | E1000_RCTL_BSEX | E1000_RCTL_LPE;
        break;
    case E1000_RXBUFFER_8192:
        RegRctl |= E1000_RCTL_SZ_8192 | E1000_RCTL_BSEX | E1000_RCTL_LPE;
        break;
    case E1000_RXBUFFER_16384:
        RegRctl |= E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX | E1000_RCTL_LPE;
        break;
    }

    if(SBP[Adapter->bd_number] > 0) {
        RegRctl |= E1000_RCTL_SBP;
    }
    E1000_WRITE_REG(Rctl, RegRctl);
    
    /*
     * Check and report the status of the link
     */
    if (!(E1000_READ_REG(Status) & E1000_STATUS_LU) && (flag == TRUE))
        printk("e1000: %s Link is Down\n", bdp->device->name);
   
       Adapter->DoRxResetFlag = B_FALSE;

    return (0);
}

/*****************************************************************************
* Name:        UpdateStatsCounters
*
* Description: This routine will dump and reset the E10001000's internal
*              Statistics counters.  The current stats dump values will be
*              added to the "Adapter's" overall statistics.
*
* Author:      IntelCorporation
*
* Born on Date:    6/13/97
*
* Arguments:
*      Adapter - A pointer to our context sensitive "Adapter" structure.
*
* Returns:
*      (none)
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/

static VOID
UpdateStatsCounters(bd_config_t * bdp)
{

    PADAPTER_STRUCT Adapter;
    net_device_stats_t *stats;

    Adapter = bdp->bddp;
    stats = &bdp->net_stats;

    /* Add the values from the chip's statistics registers to the total values
     * that we keep in software.  These registers clear on read.
     */
    Adapter->RcvCrcErrors += E1000_READ_REG(Crcerrs);
    Adapter->RcvSymbolErrors += E1000_READ_REG(Symerrs);
    Adapter->RcvMissedPacketsErrors += E1000_READ_REG(Mpc);
    Adapter->DeferCount += E1000_READ_REG(Dc);
    Adapter->RcvSequenceErrors += E1000_READ_REG(Sec);
    Adapter->RcvLengthErrors += E1000_READ_REG(Rlec);
    Adapter->RcvXonFrame += E1000_READ_REG(Xonrxc);
    Adapter->TxXonFrame += E1000_READ_REG(Xontxc);
    Adapter->RcvXoffFrame += E1000_READ_REG(Xoffrxc);
    Adapter->TxXoffFrame += E1000_READ_REG(Xofftxc);
    Adapter->Rcv64 += E1000_READ_REG(Prc64);
    Adapter->Rcv65 += E1000_READ_REG(Prc127);
    Adapter->Rcv128 += E1000_READ_REG(Prc255);
    Adapter->Rcv256 += E1000_READ_REG(Prc511);
    Adapter->Rcv512 += E1000_READ_REG(Prc1023);
    Adapter->Rcv1024 += E1000_READ_REG(Prc1522);
    Adapter->GoodReceives += E1000_READ_REG(Gprc);
    Adapter->RcvBroadcastPkts += E1000_READ_REG(Bprc);
    Adapter->RcvMulticastPkts += E1000_READ_REG(Mprc);
    Adapter->GoodTransmits += E1000_READ_REG(Gptc);
    Adapter->Rnbc += E1000_READ_REG(Rnbc);
    Adapter->RcvUndersizeCnt += E1000_READ_REG(Ruc);
    Adapter->RcvFragment += E1000_READ_REG(Rfc);
    Adapter->RcvOversizeCnt += E1000_READ_REG(Roc);
    Adapter->RcvJabberCnt += E1000_READ_REG(Rjc);
    Adapter->TotPktRcv += E1000_READ_REG(Tpr);
    Adapter->TotPktTransmit += E1000_READ_REG(Tpt);
    Adapter->TrsPkt64 += E1000_READ_REG(Ptc64);
    Adapter->TrsPkt65 += E1000_READ_REG(Ptc127);
    Adapter->TrsPkt128 += E1000_READ_REG(Ptc255);
    Adapter->TrsPkt256 += E1000_READ_REG(Ptc511);
    Adapter->TrsPkt512 += E1000_READ_REG(Ptc1023);
    Adapter->TrsPkt1024 += E1000_READ_REG(Ptc1522);
    Adapter->TrsMulticastPkt += E1000_READ_REG(Mptc);
    Adapter->TrsBroadcastPkt += E1000_READ_REG(Bptc);
    Adapter->TxAbortExcessCollisions += E1000_READ_REG(Ecol);
    Adapter->TxLateCollisions += E1000_READ_REG(Latecol);
    Adapter->TotalCollisions += E1000_READ_REG(Colc);
    Adapter->SingleCollisions += E1000_READ_REG(Scc);
    Adapter->MultiCollisions += E1000_READ_REG(Mcc);
    Adapter->FCUnsupported += E1000_READ_REG(Fcruc);

    /* The byte count registers are 64-bits, to reduce the chance of overflow
     * The entire 64-bit register clears when the high 32-bits are read, so the
     * lower half must be read first 
     */
    Adapter->RcvGoodOct  += E1000_READ_REG(Gorl);
    Adapter->RcvGoodOct     += ((uint64_t) E1000_READ_REG(Gorh) << 32);
    Adapter->TrsGoodOct  += E1000_READ_REG(Gotl);
    Adapter->TrsGoodOct  += ((uint64_t) E1000_READ_REG(Goth) << 32);
    Adapter->RcvTotalOct += E1000_READ_REG(Torl);
    Adapter->RcvTotalOct += ((uint64_t) E1000_READ_REG(Torh) << 32);
    Adapter->TrsTotalOct += E1000_READ_REG(Totl);
    Adapter->TrsTotalOct += ((uint64_t) E1000_READ_REG(Toth) << 32);

    /* New statistics registers in the 82543 */
    if (Adapter->MacType >= MAC_LIVENGOOD) {
        Adapter->AlignmentErrors  += E1000_READ_REG(Algnerrc);
        Adapter->TotalRcvErrors   += E1000_READ_REG(Rxerrc);
        Adapter->TrsUnderRun      += E1000_READ_REG(Tuc);
        Adapter->TrsNoCRS         += E1000_READ_REG(Tncrs);
        Adapter->CarrierExtErrors += E1000_READ_REG(Cexterr);
        Adapter->RcvDMATooEarly   += E1000_READ_REG(Rutec);
    }

    /* Fill out the OS statistics structure */
    stats->rx_packets = Adapter->GoodReceives;     /* total pkts received     */
    stats->tx_packets = Adapter->GoodTransmits;    /* total pkts transmitted  */
    stats->rx_bytes   = Adapter->RcvGoodOct;       /* total bytes reveived    */
    stats->tx_bytes   = Adapter->TrsGoodOct;       /* total bytes transmitted */
    stats->multicast  = Adapter->RcvMulticastPkts; /* multicast pkts received */
    stats->collisions = Adapter->TotalCollisions;  /* total collision count   */
    /* Rx Errors */
    stats->rx_errors        = Adapter->TotalRcvErrors + Adapter->RcvCrcErrors +
                              Adapter->AlignmentErrors + 
                              Adapter->RcvLengthErrors +
                              Adapter->Rnbc + Adapter->RcvMissedPacketsErrors +
                              Adapter->CarrierExtErrors;
    stats->rx_dropped       = Adapter->Rnbc;
    stats->rx_length_errors = Adapter->RcvLengthErrors;
    stats->rx_crc_errors    = Adapter->RcvCrcErrors;
    stats->rx_frame_errors  = Adapter->AlignmentErrors;
    stats->rx_fifo_errors   = Adapter->RcvMissedPacketsErrors;
    stats->rx_missed_errors = Adapter->RcvMissedPacketsErrors;
    /* Tx Errors */
    stats->tx_errors  = Adapter->TxAbortExcessCollisions +
                        Adapter->TrsUnderRun +
                        Adapter->TxLateCollisions; 
    stats->tx_aborted_errors = Adapter->TxAbortExcessCollisions;
    stats->tx_fifo_errors    = Adapter->TrsUnderRun;
    stats->tx_window_errors  = Adapter->TxLateCollisions;
    /* Tx Dropped needs to be maintained elsewhere */
}

/****************************************************************************
*
* Name:            ReadNodeAddress
*
* Description:     Gets the node/Ethernet/Individual Address for this NIC
*                  from the EEPROM.
*
*                  Example EEPROM map:
*                              Word 0 = AA00
*                              Word 1 = 1100
*                              Word 2 = 3322
*
* Author:      IntelCorporation
*
* Born on Date:    3/30/98
*
* Arguments:
*      Adapter     Ptr to this card's adapter data structure
*
* Returns:
*      Status      RET_STATUS_SUCCESS = read valid address
*                  RET_STATUS_FAILURE = unable to read address
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
***************************************************************************/
static int
ReadNodeAddress(IN PADAPTER_STRUCT Adapter, OUT PUCHAR NodeAddress)
{
    UINT i;
    USHORT EepromWordValue;

    DL_LOG(strlog(DL_ID, 0, 3, SL_TRACE, "ReadNodeAddress"));

    /* Read our node address from the EEPROM. */
    for (i = 0; i < NODE_ADDRESS_SIZE; i += 2) {
        /* Get word i from EEPROM */
        EepromWordValue = ReadEepromWord(IN Adapter, IN(USHORT)

                                         (EEPROM_NODE_ADDRESS_BYTE_0
                                          + (i / 2)));

        /* Save byte i */
        NodeAddress[i] = (UCHAR) EepromWordValue;

        /* Save byte i+1 */
        NodeAddress[i + 1] = (UCHAR) (EepromWordValue >> 8);
    }


    /* Our IA should not have the Multicast bit set */
    if (NodeAddress[0] & 0x1) {
        return (RET_STATUS_FAILURE);
    }

    memcpy(&Adapter->CurrentNetAddress[0],
           &Adapter->perm_node_address[0], DL_MAC_ADDR_LEN);
    return (RET_STATUS_SUCCESS);

}

/*****************************************************************************
* Name:        e1000_set_promisc
*
* Description: This routine sets the promiscous mode for receiving packets
*              that it is passed.
*
* Author:      IntelCorporation
*
* Born on Date:    7/7/97
*
* Arguments:
*      bd_config_t  - board struct
*      flag         - turn it on( B_TRUE ) or off ( B_FALSE )
*
* Returns:
*        B_FALSE   - if successful
*        B_TRUE   - if not 
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/
static int
e1000_set_promisc(bd_config_t * bdp, int flag)
{
    uint32_t RctlRegValue;
    uint32_t TempRctlReg;
    uint32_t NewRctlReg;
    PADAPTER_STRUCT Adapter;

    Adapter = (PADAPTER_STRUCT) bdp->bddp;

    /*
     * Save the original value in the RCTL register
     */
    RctlRegValue = E1000_READ_REG(Rctl);
    TempRctlReg = RctlRegValue;


    if (e1000_debug_level >= 1)
        printk("e1000_set_promiscuous, SOR");

    /* Check to see if we should set/clear the "Unicast Promiscuous" bit. */
    if (flag == B_TRUE) {
        /*
         * Since the promiscuous flag is set to TRUE, set both the unicast as
         * well as the multicast promiscuous mode on the RCTL
         */
        TempRctlReg |= (E1000_RCTL_UPE | E1000_RCTL_MPE | E1000_RCTL_BAM);
        E1000_WRITE_REG(Rctl, TempRctlReg);
        if (e1000_debug_level >= 1)
            printk("Promiscuous mode ON");
    } else {
        /*
         * Turn off both the unicast as well as the multicast promiscuous mode
         */
        TempRctlReg &= (~E1000_RCTL_UPE);
        TempRctlReg &= (~E1000_RCTL_MPE);
        E1000_WRITE_REG(Rctl, TempRctlReg);
        if (e1000_debug_level >= 1)
            printk("Promiscuous mode OFF");
    }


    /* Write the new filter back to the adapter, if it has changed */
    if (TempRctlReg != RctlRegValue) {
        E1000_WRITE_REG(Rctl, TempRctlReg);
    }

    NewRctlReg = E1000_READ_REG(Rctl);

    if (NewRctlReg != TempRctlReg)
        return (B_FALSE);
    else
        return (B_TRUE);
}

/*****************************************************************************
* Name:        e1000DisableInterrupt
*
* Description: This routine disables (masks) all interrupts on our adapter.
*
* Author:      IntelCorporation
*
* Born on Date:    8/25/97
*
* Arguments:
*              pointer to our "Adapter" structure.
*
* Returns:
*      (none)
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/

static void
e1000DisableInterrupt(PADAPTER_STRUCT Adapter)
{
    if (e1000_debug_level >= 1)
        printk("DisableInterrupts: SOR\n");

    /* 
     * Mask all adapter interrupts.
     */
    E1000_WRITE_REG(Imc, (0xffffffff & ~E1000_IMC_RXSEQ));

}


/*****************************************************************************
* Name:        e1000EnableInterrupt
*
* Description: This routine enables (un-masks) all interrupts on our adapter.
*
* Author:      IntelCorporation
*
* Born on Date:    8/25/97
*
* Arguments:
*              pointer to our "Adapter" structure.
*
* Returns:
*      (none)
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/

static void
e1000EnableInterrupt(PADAPTER_STRUCT Adapter)
{
    if (e1000_debug_level >= 1)
        printk("EnableInterrupts: SOR\n");

    /* Enable interrupts (SBL -- may want to enable different int bits..) */
    E1000_WRITE_REG(Ims, IMS_ENABLE_MASK);
}

/*****************************************************************************
* Name:        e1000_intr
*
* Description: This routine is the ISR for the e1000 board. It services
*        the RX & TX queues & starts the RU if it has stopped due
*        to no resources.
*
* Author:      IntelCorporation
*
* Born on Date:    8/25/97
*
* Arguments:
*      ivec    - The interrupt vector for this board.
*
* Returns:
*      (none)
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/

static void
e1000_intr(int irq, void *dev_inst, struct pt_regs *regs)
{
    /* note - regs is not used but required by the system */
    uint32_t IcrContents;
    PADAPTER_STRUCT Adapter;
    uint32_t CtrlRegValue, TxcwRegValue, RxcwRegValue;
    UINT DpcCount;
    device_t *dev;
    bd_config_t *bdp;

    dev = (device_t *) dev_inst;
    bdp = dev->priv;
    Adapter = (PADAPTER_STRUCT) bdp->bddp;

    if (e1000_debug_level >= 1)
        printk("e1000_intr: bdp = 0x%p\n ", bdp);

    if (!Adapter)
        return;

    /*
     * The board is present but not yet initialized. Since the board is not
     * initialized we do not process the interrupt
     */
    if (!bdp->flags || (bdp->flags & BOARD_DISABLED)) {
        return;
    }

#ifdef CLICK_POLLING
    if(dev->polling)
      printk("e1000_intr: polling!\n");
#endif

    /* get board status */
    if ((IcrContents = E1000_READ_REG(Icr))) {

#ifdef CLICK_POLLING
      if(dev->polling)
        printk("e1000_intr: icr %x\n", IcrContents);
#endif

        /* This card actually has interrupts to process */

        /* Disable Interrupts from this card */
        e1000DisableInterrupt(Adapter);

        /*
         * The Receive Sequence errors RXSEQ and the link status change LSC
         * are checked to detect that the cable has been pulled out. For
         * the 82542 silicon, the receive sequence errors interrupt
         * are an indication that cable is not connected. If there are 
         * sequence errors or if link status has changed, proceed to the
         * cable disconnect workaround
         */

        if (IcrContents & (E1000_ICR_RXSEQ|E1000_ICR_LSC|E1000_ICR_GPI_EN1)) {
            Adapter->GetLinkStatus =
            Adapter->LinkStatusChanged = TRUE;
            /* run the watchdog ASAP */
            mod_timer(&bdp->timer_id, jiffies);
        }
        if(IcrContents & E1000_ICR_GPI_EN1) {
            ReadPhyRegister(Adapter, PXN_INT_STATUS_REG, Adapter->PhyAddress);
        }
        if(Adapter->LinkStatusChanged && 
           Adapter->MediaType == MEDIA_TYPE_FIBER) {
            CtrlRegValue = E1000_READ_REG(Ctrl);
            TxcwRegValue = E1000_READ_REG(Txcw);
            RxcwRegValue = E1000_READ_REG(Rxcw);
            if((CtrlRegValue & E1000_CTRL_SWDPIN1) ||
               ((RxcwRegValue & E1000_RXCW_C) &&
                (TxcwRegValue & E1000_TXCW_ANE))) {
                
                E1000_WRITE_REG(Txcw, Adapter->TxcwRegValue);
                E1000_WRITE_REG(Ctrl, CtrlRegValue & ~E1000_CTRL_SLU);
                Adapter->AutoNegFailed = 0;
            }
            Adapter->LinkStatusChanged = FALSE;
        }
        if(Adapter->LinkStatusChanged && 
           Adapter->MediaType == MEDIA_TYPE_COPPER) {
            CheckForLink(Adapter);
        }

        DpcCount = Adapter->MaxDpcCount;

        /*
         * Since we are already in the interrupt context, we want to clean up 
         * as many transmit and receive packets that have been processed by
         * E1000 since taking interrupts is expensive. We keep a count called
         * the DpcCount which is the maximum number of times that we will try 
         * to clean up interrupts from within this interrupt context. If the
         * count is too high, it can lead to interrupt starvation
         */
        while (dev->polling == 0 && DpcCount > 0) {
            /* Process the receive interrupts to clean receive descriptors */
            if (e1000_debug_level >= 3)
                printk("intr: DpcCount = 0x%x\n ", DpcCount);

            ProcessReceiveInterrupts(bdp);

            /*
             * Process and clean up transmit interrupts
             */
            ProcessTransmitInterrupts(bdp, 1);

            DpcCount--;

            if (DpcCount) {
                if (!(E1000_READ_REG(Icr))) {
                    break;
                }
            }
        }

        /* Enable Interrupts */
#ifdef CLICK_POLLING
        if(dev->polling == 0)
          e1000EnableInterrupt(Adapter);
#else
        e1000EnableInterrupt(Adapter);
#endif

        /*
         * If there are any frames that have been queued, they are also 
         * Processed from this context. ??? We need to verify if there is
         * any benefit of doing this
         */
    }
    return;
}

/****************************************************************************
* Name:        ProcessTransmitInterrupts
*
* Description: This routine services the TX queues. It reclaims the
*        TCB's & TBD's & other resources used during the transmit
*        of this buffer. It is called from the ISR.
*
* Author:      IntelCorporation
*
* Born on Date:    8/7/97
*
* Arguments:   
*      bdp - Ptr to this card's DL_bdconfig structure
*
* Returns:
*   NONE 
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/

static struct sk_buff *
ProcessTransmitInterrupts(bd_config_t * bdp, int clean)
{
    PE1000_TRANSMIT_DESCRIPTOR td;
    PADAPTER_STRUCT Adapter;
    UINT NumTxSwPacketsCleaned = 0;
    device_t *dev;
    int lock_flag_tx, di, freed_some = 0;
    struct sk_buff *skb_head, *skb_last;
    skb_head = skb_last = 0;

    if (e1000_debug_level >= 3)
        printk("ProcessTransmitInterrupts, SOR\n");

    Adapter = (PADAPTER_STRUCT) bdp->bddp;
    dev = bdp->device;

    while(1){
        td = Adapter->OldestUsedTxDescriptor;
        if (td > Adapter->LastTxDescriptor)
            td -= Adapter->NumTxDescriptors;

        /* Quit if we've caught up with SendBuffer */
        if(td == Adapter->NextAvailTxDescriptor)
          break;
          
        /* Quit if board hasn't sent this packet. */
        if((td->Upper.Fields.TransmitStatus & E1000_TXD_STAT_DD) == 0)
          break;

        if (td == Adapter->LastTxDescriptor)
          Adapter->OldestUsedTxDescriptor = Adapter->FirstTxDescriptor;
        else
          Adapter->OldestUsedTxDescriptor = (td + 1);

        di = td - Adapter->FirstTxDescriptor;
	if (clean) 
	  dev_kfree_skb_irq(Adapter->TxSkBuffs[di]);
	else {
	  struct sk_buff *skb = Adapter->TxSkBuffs[di];
          if (skb_head == 0) {
            skb_head = skb;
            skb_last = skb;
            skb_last->next = NULL;
          } else {
            skb_last->next = skb;
            skb->next = NULL;
            skb_last = skb;
          }
#if __i386__ && HAVE_INTEL_CPU
          asm volatile("prefetcht0 %0" :: "m" (skb->head));
#endif
	}
        Adapter->TxSkBuffs[di] = 0;
        NumTxSwPacketsCleaned++;
        freed_some++;
    }

    /*
     * Clear tbusy if we freed some descriptors.
     */
    if (freed_some && bdp->tx_out_res){
      bdp->tx_out_res = 0;
#ifdef IANS
      if(bdp->iANSdata->iANS_status == IANS_COMMUNICATION_UP) {
        ans_notify(dev, IANS_IND_XMIT_QUEUE_READY);
      }
#endif
      clear_bit(0, (void*)&dev->tbusy);
#ifdef CLICK_POLLING
      if (dev->polling == 0) 
#endif
	netif_wake_queue(dev);
    }

    return skb_head;
}

/****************************************************************************
* Name:        e1000_set_multicast
*
* Description: This routine sets a list of multicast addresses
*        as requested by the DLPI module in the 128 * 32 MTA
*        vector table. It also calculates the appropriate hash
*        value and sets the bit in the vector table
*
* Author:      IntelCorporation
*
* Born on Date:    1/12/98
*
* Arguments:   
*      dev - Ptr to this card's dev structure
*
* Returns:
*    NONE
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static void
e1000_set_multi(device_t * dev)
{

    bd_config_t *bdp;
    PADAPTER_STRUCT Adapter;
    uint32_t TempRctlReg = 0;
    uint32_t HwLowAddress;
    uint32_t HwHighAddress;
    USHORT i, j;
    UINT HashValue = 0, HashReg, HashBit;
    UINT TempUint;
    int ret_val;
    PUCHAR MulticastBuffer;
    uint16_t PciCommandWord;
    uint32_t IntMask;
    struct dev_mc_list *mc_list;
    uchar_t *mc_buff;


    /* The data must be a multiple of the Ethernet address size. */

    if (e1000_debug_level >= 1)
        printk("e1000_set_multicast\n");

    bdp = dev->priv;
    Adapter = (PADAPTER_STRUCT) bdp->bddp;
    MulticastBuffer = Adapter->pmc_buff->MulticastBuffer;

    /* check to see if promiscuous mode should be enabled */
    if ((dev->flags & IFF_PROMISC) && !(bdp->flags & PROMISCUOUS)) {
        /* turn  promisc mode on */
        ret_val = e1000_set_promisc(bdp, B_TRUE);
        bdp->flags |= PROMISCUOUS;
    } else {
        /* turn  promisc mode off */
        ret_val = e1000_set_promisc(bdp, B_FALSE);
        bdp->flags &= ~PROMISCUOUS;
    }

#if 0                            /* we should try to enable this feature... */
    /* this is how you turn on receiving ALL multicast addrs */
    if ((dev->flags & IFF_ALLMULTI) && !(bdp->flags & ALL_MULTI)) {
        /* turn on  recv all multi addrs */
        TempRctlReg |= E1000_RCTL_MPE;
        E1000_WRITE_REG(Rctl, TempRctlReg);
        bdp->flags |= ALL_MULTI;
    } else {
        /* turn off  recv all multi addrs */
        TempRctlReg &= ~E1000_RCTL_MPE;
/* this next line with hang the load, so be careful... */
        E1000_WRITE_REG(Rctl, TempRctlReg);
        bdp->flags &= ~ALL_MULTI;
    }
#endif

    mc_buff = Adapter->pmc_buff->MulticastBuffer;
    /* Fill in the multicast addresses. */
    for (i = 0, mc_list = dev->mc_list; i < dev->mc_count;
         i++, mc_list = mc_list->next) {
        memcpy(mc_buff, (u8 *) & mc_list->dmi_addr, DL_MAC_ADDR_LEN);
        mc_buff += DL_MAC_ADDR_LEN;
    }
    /* reset the MulticastBuffer pointer */

    /* set the count in the Adapter struct */
    Adapter->NumberOfMcAddresses = dev->mc_count;


    /* adjust the count on addrs to bytes */
    Adapter->pmc_buff->mc_count = dev->mc_count * DL_MAC_ADDR_LEN;

    /* The E1000 has the ability to do perfect filtering of 16 addresses.
     * The driver uses one of the E1000's 16 receive address registers
     * for its node/network/mac/individual address.  So, we have room
     * for up to 15 multicast addresses in the CAM, additional MC
     * addresses are handled by the MTA (Multicast Table Array)
     */

    /* this just needs to be the count of how many addrs 
     * there are in the table 
     */
    TempUint = dev->mc_count;


    /* If we were using the MTA then it must be cleared */
    if (Adapter->NumberOfMcAddresses > E1000_RAR_ENTRIES - 1) {
        for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++) {
            E1000_WRITE_REG(Mta[i], 0);
        }
    }

    /* If we are given more MC addresses than we can handle, then we'll
     * notify the OS that we can't accept any more MC addresses
     */

    if (TempUint > MAX_NUM_MULTICAST_ADDRESSES) {
        Adapter->NumberOfMcAddresses = MAX_NUM_MULTICAST_ADDRESSES;
    } else {
        /* Set the number of MC addresses that we are being requested to use */
        Adapter->NumberOfMcAddresses = TempUint;
    }

    /* Store the Rctl values to use for restoring */
    TempRctlReg = E1000_READ_REG(Rctl);

    if (Adapter->MacType == MAC_WISEMAN_2_0) {

        /* if MWI was enabled then disable it before issueing the global
         * reset to the hardware. 
         */
        if (Adapter->PciCommandWord && CMD_MEM_WRT_INVALIDATE) {
            PciCommandWord =
                Adapter->PciCommandWord & ~CMD_MEM_WRT_INVALIDATE;

            WritePciConfigWord(PCI_COMMAND_REGISTER, &PciCommandWord);
        }

        /* The E1000 must be in reset before changing any RA registers.
         * Reset receive unit.  The chip will remain in the reset state
         * until software explicitly restarts it.
         */
        E1000_WRITE_REG(Rctl, E1000_RCTL_RST);

        DelayInMilliseconds(5);    /* Allow receiver time to go in to reset */
    }

   /**********************************************************************
    * Copy up to 15 MC addresses into the E1000's receive address
    * registers pairs (Ral Rah).  The first pair (Ral0 Rah0) is used
    * for our MAC/Node/Network address/IA.  If there are more than 15
    * multicast addresses then the additional addresses will be hashed
    * and the Multicast Table Array (MTA) will be used.
    **********************************************************************/
    for (i = 0, j = 1;
         (i < Adapter->NumberOfMcAddresses && j < E1000_RAR_ENTRIES);
         i++, j++) {

        /* HW expcets these in big endian so we reverse the byte order */
        HwLowAddress =
            (MulticastBuffer[i * ETH_LENGTH_OF_ADDRESS] |
             (MulticastBuffer[i * ETH_LENGTH_OF_ADDRESS + 1] << 8)
             | (MulticastBuffer[i * ETH_LENGTH_OF_ADDRESS + 2] <<
                16) |
             (MulticastBuffer[i * ETH_LENGTH_OF_ADDRESS + 3] << 24));

        /* HW expcets these in big endian so we reverse the byte order */
        HwHighAddress =
            (MulticastBuffer[i * ETH_LENGTH_OF_ADDRESS + 4] |
             (MulticastBuffer[i * ETH_LENGTH_OF_ADDRESS +
                              5] << 8) | E1000_RAH_AV);

        E1000_WRITE_REG(Rar[j].Low, HwLowAddress);
        E1000_WRITE_REG(Rar[j].High, HwHighAddress);

    }

    /* if the Receive Addresses Registers are not full then 
     * Clear the E1000_RAH_AV bit in other Receive Address Registers
     * NOTE: 'j' must be unchanged from the RAL/RAH loop
     */

    while (j < E1000_RAR_ENTRIES) {
        E1000_WRITE_REG(Rar[j].Low, 0);
        E1000_WRITE_REG(Rar[j].High, 0);
        j++;
    }

    /* hash each remaining (if any) MC address into the E1000's receive
     * multicast hash table.  NOTE: 'i' must be unchanged from the RAL/RAH loop
     */

    while (i < Adapter->NumberOfMcAddresses) {

        /* The portion of the address that is used for the hash table is
         * determined by the MulticastFilterType setting.            
         */

        switch (Adapter->MulticastFilterType) {
            /*  [0] [1] [2] [3] [4] [5] 
             *  01  AA  00  12  34  56
             *  LSB     MSB - According to H/W docs
             */

        case 0:                /* [47:36] i.e. 0x563 for above example address */
            HashValue =
                ((MulticastBuffer
                  [i * ETH_LENGTH_OF_ADDRESS +
                   4] >> 4) | (((USHORT) MulticastBuffer[i *
                                                         ETH_LENGTH_OF_ADDRESS
                                                         + 5]) << 4));
            break;

        case 1:                /* [46:35] i.e. 0xAC6 for above example address */
            HashValue =
                ((MulticastBuffer
                  [i * ETH_LENGTH_OF_ADDRESS +
                   4] >> 3) | (((USHORT) MulticastBuffer[i *
                                                         ETH_LENGTH_OF_ADDRESS
                                                         + 5]) << 5));
            break;

        case 2:                /* [45:34] i.e. 0x5D8 for above example address */
            HashValue =
                ((MulticastBuffer
                  [i * ETH_LENGTH_OF_ADDRESS +
                   4] >> 2) | (((USHORT) MulticastBuffer[i *
                                                         ETH_LENGTH_OF_ADDRESS
                                                         + 5]) << 6));
            break;

        case 3:                /* [43:32] i.e. 0x634 for above example address */
            HashValue =
                ((MulticastBuffer
                  [i * ETH_LENGTH_OF_ADDRESS + 4]) | (((USHORT)
                                                       MulticastBuffer
                                                       [i *
                                                        ETH_LENGTH_OF_ADDRESS
                                                        + 5]) << 8));
            break;

        }

      /**********************************************************
       * Set the corresponding bit in the Multicast Table Array.
       * Mta is treated like a bit vector of 4096 bit split in
       * to 128 registers of 32 bits each.  The Register to set
       * is in bits 11:5 of HashValue and the Bit within the
       * register to set is bits 4:0.
       ************************************************************/

        /* Bit number to set is in lower 5 bits */
        HashBit = HashValue & 0x1F;

        /* MTA register number is bits 11:5  */
        HashReg = (HashValue >> 5) & 0x7F;

        /* Read MTA entry */
        TempUint = E1000_READ_REG(Mta[(HashReg)]);

        /* Set hashed bit  */
        TempUint |= (1 << HashBit);

        /* Write new value */
        E1000_WRITE_REG(Mta[HashReg], TempUint);

        i++;
    }

    if (Adapter->MacType == MAC_WISEMAN_2_0) {

        /* if WMI was enabled then reenable it after issueing the global
         * or receive reset to the hardware. 
         */
        if (Adapter->PciCommandWord && CMD_MEM_WRT_INVALIDATE) {
            WritePciConfigWord(PCI_COMMAND_REGISTER,
                               &Adapter->PciCommandWord);
        }

        DelayInMilliseconds(5);

        /* Take receiver out of reset */
        E1000_WRITE_REG(Rctl, 0);
        /* clear E1000_RCTL_RST bit (and all others) */
        IntMask = E1000_READ_REG(Ims);
        e1000DisableInterrupt(Adapter);

        /* Enable receiver */
        SetupReceiveStructures(bdp, FALSE, FALSE);

        /* e1000EnableInterrupt( Adapter ); */
        E1000_WRITE_REG(Ims, IntMask);

        /* Restore Receive Control to state it was in prior to MC add request */
        E1000_WRITE_REG(Rctl, TempRctlReg);
    }


    return;
}



/****************************************************************************
* Name:        ProcessReceiveInterrupts
*
* Description: This routine processes the RX interrupt & services the 
*        RX queues. For each successful RFD, it allocates a
*        msg block & sends the msg upstream. The freed RFD is then
*        put at the end of the free list of RFD's.
*
* Author:      IntelCorporation
*
* Born on Date:    7/19/97
*
* Arguments:   
*      bdp - Ptr to this card's DL_bdconfig structure
*
* Returns:
*    NONE
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/

static void
ProcessReceiveInterrupts(bd_config_t * bdp)
{
    PADAPTER_STRUCT Adapter;
    device_t *dev;
    int bytes_srvcd;            /* # of bytes serviced */
    sk_buff_t *skb, *new_skb;
    /* Pointer to the receive descriptor being examined. */
    PE1000_RECEIVE_DESCRIPTOR CurrentDescriptor;
    PE1000_RECEIVE_DESCRIPTOR LastDescriptorProcessed;
    /* The amount of data received in the RBA (will be PacketSize +
     * 4 for the CRC).
     */
    USHORT Length;
    UINT Count = 0;
    BOOLEAN Status = FALSE;
    // net_device_stats_t *stats;

    if (e1000_debug_level >= 3)
        printk("ProcessReceiveInterrupts, SOR\n");

    Adapter = (PADAPTER_STRUCT) bdp->bddp;
    dev = bdp->device;
    // stats = &bdp->net_stats;

    bytes_srvcd = 0;

    CurrentDescriptor = Adapter->NextRxDescriptorToCheck;

    if (!((CurrentDescriptor->ReceiveStatus) & E1000_RXD_STAT_DD)) {
        if (e1000_debug_level >= 3)
            printk("Proc_rx_ints: Nothing to do!\n");
        /* don't send anything up. just clear the RFD */
        return;
    }

    /* Loop through the receive descriptors starting at the last known
     * descriptor owned by the hardware that begins a packet.
     */
    while ((CurrentDescriptor->ReceiveStatus & E1000_RXD_STAT_DD) &&
           (Count < Adapter->MaxNumReceivePackets)) {
        int di = CurrentDescriptor - Adapter->FirstRxDescriptor;

        /* Make sure this is also the last descriptor in the packet. */
        if (!(CurrentDescriptor->ReceiveStatus & E1000_RXD_STAT_EOP)) {
            /*
             * If the received packet has spanned multiple descriptors, ignore
             * and discard all the packets that do not have EOP set and proceed
             * to the next packet.
             */
            printk("Receive packet consumed mult buffers\n");

            new_skb = Adapter->RxSkBuffs[di];

        } else {                /* packet has EOP set - begin */
            /* 
             * Store the packet length. Take the CRC lenght out of the length 
             *  calculation.   
             */
            Length = CurrentDescriptor->Length - CRC_LENGTH;

            /*
             * Only the packets that are valid ethernet packets are processed and
             * sent up the stack.Normally, hardware will discard bad packets . 
             */
#ifdef IANS_BASE_VLAN_TAGGING
            if ((Length <= (Adapter->LongPacket == TRUE ? MAX_JUMBO_FRAME_SIZE :
                                                  MAXIMUM_ETHERNET_PACKET_SIZE))
                && (Length >= 
                    (bdp->iANSdata->tag_mode == IANS_BD_TAGGING_802_3AC ?
                     MINIMUM_ETHERNET_PACKET_SIZE - QTAG_SIZE :
                     MINIMUM_ETHERNET_PACKET_SIZE))
                && ((CurrentDescriptor->Errors == 0) || 
                    (SBP[Adapter->bd_number] > 0 && 
                     CurrentDescriptor->Errors == E1000_RXD_ERR_CE))) {
#else
            if ((Length <= (Adapter->LongPacket == TRUE ? MAX_JUMBO_FRAME_SIZE :
                                                  MAXIMUM_ETHERNET_PACKET_SIZE))
                && (Length >= MINIMUM_ETHERNET_PACKET_SIZE)
                && ((CurrentDescriptor->Errors == 0) || 
                    (SBP[Adapter->bd_number] > 0 && 
                     CurrentDescriptor->Errors == E1000_RXD_ERR_CE))) {
#endif
                Status = TRUE;

                /* allocate a mesg buff to copy the msg in */
                skb = Adapter->RxSkBuffs[di];
                if (skb == NULL) {
                    printk("ProcessReceiveInterrupts found a NULL skb\n");
                    break;
                }


                if (e1000_debug_level >= 3)
                    printk
                        ("ProcRecInts: skb = 0x%p, skb_data = 0x%p, len = 0x%x\n",
                         skb, skb->data, skb->len);
                /*
                 * Allocate a new receive buffer to replace the receive buffer that
                 *   is being sent up the stack.
                 */
#ifdef IANS
                new_skb = alloc_skb(Adapter->RxBufferLen + BD_ANS_INFO_SIZE, 
                                    GFP_ATOMIC);
#else
                new_skb = alloc_skb(Adapter->RxBufferLen + 2, GFP_ATOMIC);
#endif
                if (new_skb == NULL) {

                    /* 
                     * If the allob_physreq fails, we then try to copy the received
                     * packet into a message block that is allocated using the call
                     * allocb.
                     */
                    printk("!Proc_Rec_Ints cannot alloc_skb memory\n");

                    return;
                }

#ifdef IANS
                skb_reserve(new_skb, BD_ANS_INFO_SIZE);
#else
                skb_reserve(new_skb, 2);
#endif
                /*
                 * Adjust the skb and send the received packet up the stack
                 */

                /* adjust the skb internal pointers */
                /* Modifies skb->tail and skb->len */
                skb_put(skb, Length);

                /* CHECKSUM */
                /* set the checksum info */
                     skb->ip_summed = CHECKSUM_NONE;

#ifdef IANS
                if(bdp->iANSdata->iANS_status == IANS_COMMUNICATION_UP) {
                    if(bd_ans_os_Receive(bdp, CurrentDescriptor, skb) == 
                        BD_ANS_FAILURE) {
                        dev_kfree_skb_irq(skb);
                    } else {
                        /* pass the packet up the stack */
                        netif_rx(skb);
                    }
                } else {
                    /* set the protocol */
                    skb->protocol = eth_type_trans(skb, dev);
                    /* pass the packet up the stack */
                    netif_rx(skb);
                }
#else
                /* set the protocol */
                skb->protocol = eth_type_trans(skb, dev);
                /* pass the packet up the stack */
                netif_rx(skb);

                if (e1000_debug_level >= 3)
                    printk
                        ("ProcRecInts: After skb_put, new_skb = 0x%p\n",
                         new_skb);

#endif
            } else {
                printk("e1000: Bad Packet Length\n");
                skb = Adapter->RxSkBuffs[di];
                new_skb = skb;    /* Reuse the same old skb */

                if (e1000_debug_level >= 3)
                    printk("e1000: re-using same skb\n");

            }                    /* packet len is good/bad if */
        }                        /* packet has EOP set - end */

        /* Zero out the receive descriptors status  */
        CurrentDescriptor->ReceiveStatus = 0;

        /* set who this is from */
        new_skb->dev = dev;

        Adapter->RxSkBuffs[di] = new_skb;

        if (new_skb == 0){
            CurrentDescriptor->BufferAddress = 0;
        } else {
            e1000_rxfree_cnt++;

            CurrentDescriptor->BufferAddress = virt_to_bus(new_skb->tail);
        }

        /* Advance our pointers to the next descriptor (checking for wrap). */
        if (CurrentDescriptor == Adapter->LastRxDescriptor)
            Adapter->NextRxDescriptorToCheck = Adapter->FirstRxDescriptor;
        else
            Adapter->NextRxDescriptorToCheck++;

        LastDescriptorProcessed = CurrentDescriptor;
        CurrentDescriptor = Adapter->NextRxDescriptorToCheck;

        if (e1000_debug_level >= 3)
            printk("Next RX Desc to check is 0x%p\n", CurrentDescriptor);

        Count++;

        /* Advance the E1000's Receive Queue #0  "Tail Pointer". */
        E1000_WRITE_REG(Rdt0, (((uintptr_t) LastDescriptorProcessed -
                                (uintptr_t) Adapter->FirstRxDescriptor) >> 4));

        if (e1000_debug_level >= 3)
            printk("Rx Tail pointer is now 0x%lX\n",
                   (((uintptr_t) CurrentDescriptor -
                     (uintptr_t) Adapter->FirstRxDescriptor) >> 4));

    }                            /* while loop for all packets with DD set */

    if (e1000_debug_level >= 3)
        printk("ProcessReceiveInterrupts: done\n");
    return;
}

/****************************************************************************
* Name:        e1000_watchdog
*
* Description: This routine monitors the board activity. It also updates the 
*              statistics that are used by some tools.
*
* Author:      IntelCorporation
*
* Born on Date:    8/2/97
*
* Arguments:   NONE
*
* Returns:     NONE
* 
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/


static void
e1000_watchdog(device_t * dev)
{
    uint16_t LineSpeed, FullDuplex;
    bd_config_t *bdp;
    PADAPTER_STRUCT Adapter;

    bdp = dev->priv;
    Adapter = (PADAPTER_STRUCT) bdp->bddp;

    /*
     * the routines in the watchdog should only be executed if the board pointer
     * is valid, i.e the adapter is actually present.
     */
    if (bdp->flags & BOARD_PRESENT) {

        if(!Adapter->AdapterStopped) {
            CheckForLink(Adapter);
        }
        if(E1000_READ_REG(Status) & E1000_STATUS_LU) {
            GetSpeedAndDuplex(Adapter, &LineSpeed, &FullDuplex);
            Adapter->cur_line_speed = (uint32_t) LineSpeed;
            Adapter->FullDuplex = (uint32_t) FullDuplex;
#ifdef IANS
            Adapter->ans_link = IANS_STATUS_LINK_OK;
            Adapter->ans_speed = (uint32_t) LineSpeed;
            Adapter->ans_duplex = FullDuplex == FULL_DUPLEX ? 
                BD_ANS_DUPLEX_FULL : BD_ANS_DUPLEX_HALF;
#endif
            if(Adapter->LinkIsActive == FALSE) {
                printk("e1000: %s %ld Mbps %s Link is Up FlowCtl:%02x\n",
                       dev->name,
                        Adapter->cur_line_speed, 
                        Adapter->FullDuplex == FULL_DUPLEX ?
                        "Full Duplex" : "Half Duplex",
                       Adapter->FlowControl);
                Adapter->LinkIsActive = TRUE;
            }
        } else {
            Adapter->cur_line_speed = 0;
            Adapter->FullDuplex = 0;
#ifdef IANS
            Adapter->ans_link = IANS_STATUS_LINK_FAIL;
            Adapter->ans_speed = 0;
            Adapter->ans_duplex = 0;
#endif
            if(Adapter->LinkIsActive == TRUE) {
                printk("e1000: %s Link is Down\n", dev->name);
                Adapter->LinkIsActive = FALSE;
            }
        }
        
        /* Update the statistics needed by the upper */
        UpdateStatsCounters(bdp);

    }
#ifdef IANS
    if (bdp->iANSdata->reporting_mode == IANS_STATUS_REPORTING_ON) {
        bd_ans_os_Watchdog(dev, bdp);
    }
#endif
    /* reset the timer to 2 sec */
    mod_timer(&bdp->timer_id, jiffies + (2 * HZ));

    return;
}


/* pci.c */

/*****************************************************************************
* Name:        e1000_find_pci_device
*
* Description: This routine finds all PCI adapters that have the given Device
*              ID and Vendor ID.  It will store the IRQ, I/O, mem address,
*              node address, and slot information for each adapter in the
*              CardsFound structure.  This routine will also enable the bus
*              master bit on any of our adapters (some BIOS don't do this).
*
*
* Author:      IntelCorporation
*
* Born on Date:    2/1/98
*
* Arguments:
*      vendor_id - Vendor ID of our 82557 based adapter.
*      device_id - Device ID of our 82557 based adapter.
*
* Returns:
*      B_TRUE     - if found pci devices successfully
*      B_FALSE     - if no pci devices found
*
* Modification log:
* Date      Who  Description
* --------  ---  --------------------------------------------------------
*
*****************************************************************************/
static boolean_t
e1000_find_pci_device(pci_dev_t * pcid, PADAPTER_STRUCT Adapter)
{
    ulong_t PciTrdyTimeOut = 0;
    ulong_t PciRetryTimeOut = 0;
    int status = 0;
    uint_t PciCommandWord = 0;

    if (e1000_debug_level >= 1)
        printk("e1000_find_pci_device\n");

    if ((((ushort_t) pcid->vendor) == E1000_VENDOR_ID) &&
        ((((ushort_t) pcid->device) == WISEMAN_DEVICE_ID) ||
        (((ushort_t) pcid->device) == LIVENGOOD_FIBER_DEVICE_ID) ||
        (((ushort_t) pcid->device) == LIVENGOOD_COPPER_DEVICE_ID))) {

        if (e1000_debug_level >= 2)
            printk
                ("pcid is ours, vendor = 0x%x, device = 0x%x\n",
                 pcid->vendor, pcid->device);

        /* Read the values of the Trdy timeout and
           * also the retry count register
         */

        pci_read_config_byte(pcid,
                             PCI_TRDY_TIMEOUT_REGISTER,
                             (uchar_t *) & PciTrdyTimeOut);

        pci_read_config_byte(pcid,
                             PCI_RETRY_TIMEOUT_REGISTER,
                             (uchar_t *) & PciRetryTimeOut);

        pci_read_config_byte(pcid,
                             PCI_REVISION_ID,
                             (uchar_t *) & (Adapter->RevID));

        pci_read_config_word(pcid, PCI_SUBSYSTEM_ID,
                             (ushort_t *) & (Adapter->SubSystemId));

        pci_read_config_word(pcid,
                             PCI_SUBSYSTEM_VENDOR_ID,
                             (ushort_t *) & (Adapter->SubVendorId));

        pci_read_config_word(pcid,
                             PCI_COMMAND,
                             (ushort_t *) & (Adapter->PciCommandWord));

        PciCommandWord = Adapter->PciCommandWord;
        Adapter->DeviceNum = pcid->devfn;

        Adapter->VendorId = pcid->vendor;
        Adapter->DeviceId = pcid->device;

        if (e1000_debug_level >= 2) {
            printk("PciTrdyTimeOut = 0x%x\n", (uchar_t) PciTrdyTimeOut);
            printk("PciRetryTimeOut = 0x%x\n", (uchar_t) PciRetryTimeOut);
            printk("RevID = 0x%x\n", (uchar_t) Adapter->RevID);
            printk("SUBSYSTEM_ID = 0x%x\n", Adapter->SubSystemId);
            printk("SUBSYSTEM_VENDOR_ID = 0x%x\n", Adapter->SubVendorId);
            printk("PciCommandWord = 0x%x\n",
                   (ushort_t) Adapter->PciCommandWord);
            printk("DeviceNum = 0x%x\n", Adapter->DeviceNum);
        }
        if (e1000_pcimlt_override)
            pci_write_config_byte(pcid,
                                  PCI_LATENCY_TIMER,
                                  e1000_pcimlt_override);

        /* code insp #2 */
        if (!(e1000_pcimwi_enable)) {
            if (Adapter->PciCommandWord & CMD_MEM_WRT_INVALIDATE) {
                PciCommandWord =
                    Adapter->PciCommandWord & ~CMD_MEM_WRT_INVALIDATE;
                pci_write_config_word(pcid,
                                      PCI_COMMAND_REGISTER,
                                      PciCommandWord);
            }
        }

        /* Set the Trdy timeout to zero if it is not
         * already so
         */
        if (PciTrdyTimeOut) {
            PciTrdyTimeOut = 0;
            pci_write_config_byte(pcid,
                                  PCI_TRDY_TIMEOUT_REGISTER,
                                  PciTrdyTimeOut);

            pci_read_config_byte(pcid,
                                 PCI_TRDY_TIMEOUT_REGISTER,
                                 (uchar_t *) & PciTrdyTimeOut);

            if (PciTrdyTimeOut)
                status = B_FALSE;
            else
                status = B_TRUE;

        } else
            status = B_TRUE;

        /* Set the retry timeout to zero if it is not
           * already so
         */
        if (PciRetryTimeOut) {
            PciRetryTimeOut = 0;
            pci_write_config_byte(pcid,
                                  PCI_RETRY_TIMEOUT_REGISTER,
                                  PciRetryTimeOut);

            pci_read_config_byte(pcid,
                                 PCI_RETRY_TIMEOUT_REGISTER,
                                 (uchar_t *) & PciRetryTimeOut);

            if (PciRetryTimeOut)
                status = B_FALSE;
            else
                status = B_TRUE;
        } else
            status = B_TRUE;
    }

    if (e1000_debug_level >= 1)
        printk("find_pci: end, status = 0x%x\n", status);

    return (status);

}


/****************************************************************************
* Name:        e1000_sw_init
*
* Description : This routine initializes all software structures needed by the
*               driver. Allocates the per board structure for storing adapter 
*               information. This routine also allocates all the transmit and
*               and receive related data structures for the driver. The memory-
*               mapped PCI BAR address space is also allocated in this routine.
*
* Author:      IntelCorporation
*
* Born on Date:    7/21/97
*
* Arguments:   
*    bdp - Pointer to the DLPI board structure.
*
* Returns:
*    B_TRUE  - if successfully initialized
*    B_FALSE - if S/W initialization failed
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/

static boolean_t
e1000_sw_init(bd_config_t * bdp)
{
    PADAPTER_STRUCT Adapter;    /* stores all adapter specific info */
    ulong_t mem_base;            /* Memory base address */
    uint_t bd_no;
    int i;

    if (e1000_debug_level >= 1)
        printk("e1000_sw_init: [brd %d] begin\n", bdp->bd_number);

    Adapter = bdp->bddp;

    mem_base = bdp->mem_start;
    bd_no = bdp->bd_number;

    /*
     * The board specific information like the memory base address, the IO base
     * address and the board number are also stored in the Adapter structure
     */
    Adapter->mem_base = mem_base;
    Adapter->bd_number = bd_no;

    if (e1000_debug_level >= 2)
        printk
            ("e1000 - PR0/1000 board located at memory address 0x%lx\n",
             mem_base);

    /* First we have to check our "NumTxDescriptors" and make sure it is
     *  a multiple of 8, because the E1000 requires this...       
     */
    TxDescriptors[Adapter->bd_number] += (REQ_TX_DESCRIPTOR_MULTIPLE - 1);
    TxDescriptors[Adapter->bd_number] &=
        (~(REQ_TX_DESCRIPTOR_MULTIPLE - 1));

    Adapter->NumTxDescriptors = TxDescriptors[Adapter->bd_number];

    if(!(Adapter->TxSkBuffs =
         (struct sk_buff **) malloc_contig(sizeof(struct sk_buff *) *
                                           TxDescriptors
                                           [Adapter->bd_number]))) {
      printk("e1000_sw_init TxSkBuffs alloc failed\n");
      return(0);
    }
    memset(Adapter->TxSkBuffs, 0,
           sizeof(struct sk_buff *) * TxDescriptors[Adapter->bd_number]);
           

    /*
     * Allocate memory for the transmit buffer descriptors that are shared
     * between the driver and the E1000. The driver uses these descriptors to
     * give packets to the hardware for transmission  and the hardware returns
     * status information in this memory area once the packet has been 
     * transmitted.
     */
    bdp->base_tx_tbds = (void *) kmalloc(
                                         (sizeof
                                          (E1000_TRANSMIT_DESCRIPTOR) *
                                          TxDescriptors
                                          [Adapter->bd_number]) + 4096,
                                         GFP_KERNEL);
    if (bdp->base_tx_tbds == NULL) {
        printk("e1000_sw_init e1000_rbd_data alloc failed\n");
        return 0;
    }
    Adapter->e1000_tbd_data = (PE1000_TRANSMIT_DESCRIPTOR)
        (((unsigned long) bdp->base_tx_tbds + 4096) & ~4096);

    if (e1000_debug_level >= 2)
        printk("tbd_data = 0x%p\n", Adapter->e1000_tbd_data);

    /*
     * Set the first transmit descriptor to the beginning of the allocated
     * memory area and the last descriptor to the end of the memory area
     */
    Adapter->FirstTxDescriptor = Adapter->e1000_tbd_data;

    Adapter->LastTxDescriptor =
        Adapter->FirstTxDescriptor + (Adapter->NumTxDescriptors - 1);

    /* First we have to check our "NumRxDescriptors" and make sure it is
     * a multiple of 8, because the E10001000 requires this...    
     */
    RxDescriptors[Adapter->bd_number] += (REQ_RX_DESCRIPTOR_MULTIPLE - 1);
    RxDescriptors[Adapter->bd_number] &=
        (~(REQ_RX_DESCRIPTOR_MULTIPLE - 1));

    Adapter->NumRxDescriptors = RxDescriptors[Adapter->bd_number];
    printk("adapter: %d rx descriptors\n", Adapter->NumRxDescriptors);

    if(!(Adapter->RxSkBuffs =
         (struct sk_buff **) malloc_contig(sizeof(struct sk_buff *) *
                                           RxDescriptors
                                           [Adapter->bd_number]))) {
      printk("e1000_sw_init RxSkBuffs alloc failed\n");
      return(0);
    }
    memset(Adapter->RxSkBuffs, 0,
           sizeof(struct sk_buff *) * RxDescriptors[Adapter->bd_number]);

   /*------------------------------------------------------------------------
    * Allocate memory for the receive descriptors (in shared memory), with
    * enough room left over to make sure that we can properly align the
    * structures.
    *---------------------------------------------------------------------- 
    */

    bdp->base_rx_rbds = (void *) kmalloc(
                                         (sizeof
                                          (E1000_RECEIVE_DESCRIPTOR) *
                                          RxDescriptors
                                          [Adapter->bd_number]) + 4096,
                                         GFP_KERNEL);
    if (bdp->base_rx_rbds == 0) {
        printk("e1000_sw_init e1000_rbd_data alloc failed\n");
        return 0;
    }
    Adapter->e1000_rbd_data = (PE1000_RECEIVE_DESCRIPTOR)
        (((unsigned long) bdp->base_rx_rbds + 4096) & ~4096);

    if (e1000_debug_level >= 2)
        printk("rbd_data = 0x%p\n", Adapter->e1000_rbd_data);

    Adapter->FirstRxDescriptor =
        (PE1000_RECEIVE_DESCRIPTOR) Adapter->e1000_rbd_data;

    Adapter->LastRxDescriptor =
        Adapter->FirstRxDescriptor + (Adapter->NumRxDescriptors - 1);

   /*------------------------------------------------------------------------
    * We've allocated receive buffer pointers, and receive descriptors. Now
    * Allocate a buffer for each descriptor, and zero the buffer.
    *---------------------------------------------------------------------- 
    */

   /*------------------------------------------------------------------------
    * For each receive buffer, the Physical address will be stored
    * in the RX_SW_PACKET's "PhysicalAddress" field, while the
    * virtual address will be stored in the "VirtualAddress" field.
    *----------------------------------------------------------------------- 
    */

    /* allocate a physreq structure for specifying receive buffer DMA
     * requirements. 
     */

    /*
     * Allocate an initial set of receive sk_buffs.
     */
    for (i = 0; i < Adapter->NumRxDescriptors; i++) {
      struct sk_buff *skb;

#ifdef IANS
        skb = alloc_skb(Adapter->RxBufferLen + BD_ANS_INFO_SIZE, 
                                    GFP_ATOMIC);
#else
        skb = alloc_skb(Adapter->RxBufferLen + 2, GFP_ATOMIC);
#endif
        if (skb == NULL) {
            printk("e1000_sw_init SetupReceiveStructures BIG PROBLEM\n");
            return 0;
        } else {
            /* make the 14 byte mac header align to 16 */
#ifdef IANS
            skb_reserve(skb, BD_ANS_INFO_SIZE);
#else
            skb_reserve(skb, 2);
#endif
            /* set who this is from - JR 9/10/99 */
            skb->dev = bdp->device;

            Adapter->RxSkBuffs[i] = skb;
        }
    }


    /*
     * Set up the multicast table data area
     */
/*
   Adapter->pmc_buff->MulticastBuffer =
         ((mltcst_cb_t *)&bdp->mc_data)->MulticastBuffer;
*/
    Adapter->pmc_buff = (mltcst_cb_t *) bdp->mc_data;

    if (e1000_debug_level >= 1)
        printk("pmc_buff = 0x%p\n", Adapter->pmc_buff);

    return 1;
}

/****************************************************************************
* Name:        e1000_alloc_space
*
* Description : This routine allocates paragraph ( 16 bit ) aligned memory for
*                the driver. Memory allocated is for the following structures
*               - BDP ( the main interface struct between dlpi and the driver )
*               - error count structure for adapter statistics
*
*               For the MP_VERSION of this driver, each sap structure returned
*               by this routine has a pre allocated synchornize var. Ditto for
*               BDP's allocated ( they have a spin lock in them ).
*
* Author:      IntelCorporation
*
* Born on Date:    7/11/97
*
* Arguments:   
*    None
*
* Returns:
*    TRUE  - if successfully allocated
*    FALSE - if S/W allocation failed
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static bd_config_t *
e1000_alloc_space(void)
{
    bd_config_t *bdp, *temp_bd;
    PADAPTER_STRUCT Adapter;    /* stores all adapter specific info */

    if (e1000_debug_level >= 1)
        printk("e1000_alloc_space: begin\n");

    /* allocate space for the DL_board_t structures */
    bdp = (bd_config_t *) kmalloc(sizeof(bd_config_t), GFP_KERNEL);

    if (bdp == NULL) {
        if (e1000_debug_level >= 2)
            printk("e1000_alloc_space e1000_config alloc failed\n");
        return NULL;
    }

    /* fill the bdp with zero */
    memset(bdp, 0x00, sizeof(*bdp));

    if (e1000_debug_level >= 2)
        printk("bdp = 0x%p\n", bdp);

    /* if first one, save it, else link it into the chain of bdp's */
    if (e1000first == NULL) {
        e1000first = bdp;
        bdp->bd_number = 0;
        bdp->bd_next = NULL;
        bdp->bd_prev = NULL;

        if (e1000_debug_level >= 2)
            printk("First one\n");

    } else {
        /* No, so find last in list and link the new one in */
        temp_bd = e1000first;
        bdp->bd_number = 1;        /* it is at least 1 */
        while (temp_bd->bd_next != NULL) {
            temp_bd = (bd_config_t *) temp_bd->bd_next;
            bdp->bd_number++;    /* set the board number */
        }
        temp_bd->bd_next = bdp;
        bdp->bd_next = NULL;
        bdp->bd_prev = temp_bd;
        if (e1000_debug_level >= 2)
            printk("Not first one\n");

    }

    /* 
     * Allocate the  Adapter sturcuture. The Adapter structure contains all the
     * information that is specific to that board instance. It contains pointers
     * to all the transmit and receive data structures for the board, all the 
     * PCI related information for the board, and all the statistical counters
     * associated with the board.
     */
    Adapter =
        (PADAPTER_STRUCT) kmalloc(sizeof(ADAPTER_STRUCT), GFP_KERNEL);
    if (Adapter == NULL) {
        if (e1000_debug_level >= 2)
            printk("e1000_sw_init Adapter structure alloc failed\n");
        return (NULL);
    }

    memset(Adapter, 0x00, sizeof(ADAPTER_STRUCT));

    /*
     * The Adapter pointer is made to point to the bddp ( Board dependent 
     * pointer) that is referenced off the bdp ( board ) structure.
     */
    bdp->bddp = Adapter;

    if (e1000_debug_level >= 2)
        printk("bdp->bddp = 0x%p\n", bdp->bddp);

    /* allocate space for multi-cast address space */
    if (!
        (bdp->mc_data =
         (pmltcst_cb_t) malloc_contig(sizeof(mltcst_cb_t)))) {
        if (e1000_debug_level >= 2)
            printk("e1000_alloc_space mc_data alloc failed\n");
        return NULL;
    }
    memset(bdp->mc_data, 0x00, sizeof(mltcst_cb_t));

    if (e1000_debug_level >= 2)
        printk("bdp->mc_data = 0x%p\n", bdp->mc_data);

    if (e1000_debug_level >= 1)
        printk("e1000_alloc_space: end\n");

    return (bdp);
}

/****************************************************************************
* Name:        e1000_dealloc_space
*
* Description : This routine frees all the memory allocated by "alloc_space".
*
* Author:      IntelCorporation
*
* Born on Date:    7/17/97
*
* Arguments:   
*    None
*
* Returns:
*    none
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static void
e1000_dealloc_space(bd_config_t * bdp)
{
    if (e1000_debug_level >= 1)
        printk("e1000_dealloc_space, bdp = 0x%p\n", bdp);
    if (bdp) {
        free_contig(bdp->mc_data);
        bdp->mc_data = NULL;

        free_contig(bdp->bddp);
        bdp->bddp = NULL;

        /* unlink the bdp from the linked list */
        if (bdp == e1000first) {
            e1000first = (bd_config_t *) bdp->bd_next;
            if (bdp->bd_next)
                ((bd_config_t *) bdp->bd_next)->bd_prev = NULL;
        } else {
            if (bdp->bd_next)
                ((bd_config_t *) bdp->bd_next)->bd_prev = bdp->bd_prev;
            if (bdp->bd_prev)
                ((bd_config_t *) bdp->bd_prev)->bd_next = bdp->bd_next;
        }
    }

    free_contig(bdp);
    bdp = NULL;

    return;
}

/****************************************************************************
* Name:        malloc_contig
*
* Description : This routine allocates a contigious chunk of memory of 
*                 specified size.
*
* Author:      IntelCorporation
*
* Born on Date:    7/18/97
*
* Arguments:   
*    size - Size of contigious memory required.
*
* Returns:
*    void ptr  - if successfully allocated
*    NULL       - if allocation failed
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static void *
malloc_contig(int size)
{
    void *mem;

    /* allocate memory */
    mem = kmalloc(size, GFP_KERNEL);
    if (!mem)
        return (NULL);

    return (mem);
}

/****************************************************************************
* Name:        free_contig
*
* Description : This routine frees up space previously allocated by 
*               malloc_contig.
*
* Author:      IntelCorporation
*
* Born on Date:    1/18/98
*
* Arguments:   
*    ptr  - Pointer to the memory to free.
*    size - Size of memory to free.
*
* Returns:
*    TRUE  - if successfully initialized
*    FALSE - if S/W initialization failed
*
* Modification log:
* Date      Who  Description
* --------  ---  -------------------------------------------------------- 
*
****************************************************************************/
static void
free_contig(void *ptr)
{
    if (ptr)
        kfree(ptr);

    ptr = NULL;
}

static int
e1000_GetBrandingMesg(uint16_t dev, uint16_t sub_ven, uint16_t sub_dev)
{
    char *mesg = NULL;
    int i = 0;

    /* Go through the list of all valid subsystem IDs */
    while (e1000_vendor_info_array[i].idstr != NULL) {
        /* Look for exact match on sub_dev and sub_ven */
        if ((e1000_vendor_info_array[i].dev == dev) &&
            (e1000_vendor_info_array[i].sub_ven == sub_ven) &&
            (e1000_vendor_info_array[i].sub_dev == sub_dev)) {
            mesg = e1000_vendor_info_array[i].idstr;
            break;
        } else if ((e1000_vendor_info_array[i].dev == dev) &&
                   (e1000_vendor_info_array[i].sub_ven == sub_ven) &&
                   (e1000_vendor_info_array[i].sub_dev == CATCHALL)) {
            mesg = e1000_vendor_info_array[i].idstr;
        } else if ((e1000_vendor_info_array[i].dev == dev) &&
                   (e1000_vendor_info_array[i].sub_ven == CATCHALL) &&
                   (mesg == NULL)) {
            mesg = e1000_vendor_info_array[i].idstr;
        }
        i++;
    }
    if (mesg != NULL) {
        strcpy(e1000id_string, mesg);
        return 1;
    } else
        return 0;
}

/* fxhw.c */
static boolean_t
DetectKnownChipset(PADAPTER_STRUCT Adapter)
{
    pci_dev_t *pcid;
    ulong_t DataPort;
    uchar_t SaveConfig;
    uchar_t TestConfig;

    SaveConfig = inb(CF2_SPACE_ENABLE_REGISTER);

    outb((uchar_t) CF2_SPACE_ENABLE_REGISTER, 0x0E);

    TestConfig = inb(CF2_SPACE_ENABLE_REGISTER);

    if (TestConfig == 0x0E) {

        outb((uchar_t) CF2_SPACE_ENABLE_REGISTER, SaveConfig);

        return FALSE;
    }


    if (
        (pcid =
         pci_find_device(PCI_VENDOR_ID_INTEL, INTEL_440BX_AGP, NULL))
        || (pcid = pci_find_device(PCI_VENDOR_ID_INTEL, INTEL_440BX, NULL))
        || (pcid = pci_find_device(PCI_VENDOR_ID_INTEL, INTEL_440GX, NULL))
        || (pcid = pci_find_device(PCI_VENDOR_ID_INTEL, INTEL_440FX, NULL))
        || (pcid =
            pci_find_device(PCI_VENDOR_ID_INTEL, INTEL_430TX, NULL))) {

        outb((uchar_t) CF2_SPACE_ENABLE_REGISTER, SaveConfig);

        if (e1000_debug_level >= 3)
            printk
                ("Found a known member of the 430 or 440 chipset family");

        return TRUE;
    }


    if (
        (pcid =
         pci_find_device(PCI_VENDOR_ID_INTEL, INTEL_450NX_PXB, NULL))) {

        pci_read_config_byte(pcid, PCI_REV_ID_REGISTER, (u8 *) & DataPort);

        if (e1000_debug_level >= 3)
            printk
                ("Found a 450NX chipset with PXB rev ID 0x%x\n",
                 (uchar_t) DataPort);

        outb((uchar_t) CF2_SPACE_ENABLE_REGISTER, SaveConfig);

        if (((uchar_t) DataPort) >= PXB_C0_REV_ID) {
            if (e1000_debug_level >= 3)
                printk("Found a 450NX chipset with C0 or later PXB");
            return FALSE;
        } else {
            if (e1000_debug_level >= 3)
                printk("Found a 450NX chipset with B1 or earlier PXB");
            return TRUE;
        }
    }

    if (
        (pcid =
         pci_find_device(PCI_VENDOR_ID_INTEL, INTEL_450KX_GX_PB, NULL))) {

        outb((uchar_t) CF2_SPACE_ENABLE_REGISTER, SaveConfig);

        if (e1000_debug_level >= 3)
            printk("Found a 450KX or 450GX chipset");

        return TRUE;
    }

    outb((uchar_t) CF2_SPACE_ENABLE_REGISTER, SaveConfig);

    if (e1000_debug_level >= 3)
        printk("Did not find a known chipset");

    return FALSE;
}

static int
e1000_poll_on(struct device *dev)
{
  unsigned long flags;
  bd_config_t *bdp = dev->priv;
  PADAPTER_STRUCT Adapter = (PADAPTER_STRUCT) bdp->bddp;

#ifdef CLICK_POLLING
  if (!dev->polling) {
    printk("e1000_poll_on\n");

    save_flags(flags);
    cli();

    dev->polling = 2;
    e1000DisableInterrupt(Adapter);

    restore_flags(flags);

    Adapter->NextRxIndexToFill =
      Adapter->NextRxDescriptorToCheck - Adapter->FirstRxDescriptor;
  }
#endif

  return 0;
}

static int
e1000_poll_off(struct device *dev)
{
  bd_config_t *bdp = dev->priv;
  PADAPTER_STRUCT Adapter = (PADAPTER_STRUCT) bdp->bddp;

#ifdef CLICK_POLLING
  if(dev->polling > 0){
    dev->polling = 0;
    e1000EnableInterrupt(Adapter);
    printk("e1000_poll_off\n");
  }
#endif

  return 0;
}

static struct sk_buff *
e1000_rx_poll(struct device *dev, int *want)
{
  bd_config_t *bdp = dev->priv;
  PADAPTER_STRUCT Adapter = (PADAPTER_STRUCT) bdp->bddp;
  int got = 0, di;
  struct sk_buff *skb_head = 0, *skb_last = 0;
  PE1000_RECEIVE_DESCRIPTOR CurrentDescriptor;
  PE1000_RECEIVE_DESCRIPTOR LastDescriptorProcessed;
  sk_buff_t *skb, *new_skb;
  USHORT Length;

  while(got < *want){
    CurrentDescriptor = Adapter->NextRxDescriptorToCheck;
    di = CurrentDescriptor - Adapter->FirstRxDescriptor;
    skb = Adapter->RxSkBuffs[di];
   
#if 1
    {
      PE1000_RECEIVE_DESCRIPTOR PrefetchDescriptor;
      sk_buff_t *next_skb;
      if (CurrentDescriptor == Adapter->LastRxDescriptor)
        PrefetchDescriptor = Adapter->FirstRxDescriptor;
      else
        PrefetchDescriptor = Adapter->NextRxDescriptorToCheck+1;
      next_skb = 
	Adapter->RxSkBuffs[PrefetchDescriptor-Adapter->FirstRxDescriptor];
      /* this does not seem to matter much */
#if __i386__ && HAVE_INTEL_CPU
      asm volatile("prefetcht0 %0" :: "m" (PrefetchDescriptor->ReceiveStatus));
#endif
    }
#endif

    if(skb == 0)
      break;
    if((CurrentDescriptor->ReceiveStatus & E1000_RXD_STAT_DD) == 0)
      break;
    if (!(CurrentDescriptor->ReceiveStatus & E1000_RXD_STAT_EOP)) {
      printk("Receive packet consumed mult buffers\n");
      if(skb)
        dev_kfree_skb(skb);
    } else {
      Length = CurrentDescriptor->Length - CRC_LENGTH;
      if ((Length <= (Adapter->LongPacket == TRUE ? MAX_JUMBO_FRAME_SIZE :
                      MAXIMUM_ETHERNET_PACKET_SIZE))
          && (Length >= MINIMUM_ETHERNET_PACKET_SIZE)
          && ((CurrentDescriptor->Errors == 0) || 
              (SBP[Adapter->bd_number] > 0 && 
               CurrentDescriptor->Errors == E1000_RXD_ERR_CE))) {
	/* this is cheating: instead of calling skb_put,
	 * we just assume we get the right size */
        /* skb_put(skb, Length); */
	{
	  unsigned char *tmp = skb->tail;
	  skb->tail += Length;
	  skb->len += Length;
        }

        skb->ip_summed = CHECKSUM_NONE;
        skb->protocol = eth_type_trans(skb, dev);

        if (got == 0) {
          skb_head = skb;
          skb_last = skb;
          skb_last->next = NULL;
        } else {
          skb_last->next = skb;
          skb->next = NULL;
          skb_last = skb;
        }

        got++;
      } else {
        printk("e1000: Bad Packet Length\n");
      }
    }

    Adapter->RxSkBuffs[di] = 0;

    if (CurrentDescriptor == Adapter->LastRxDescriptor)
      Adapter->NextRxDescriptorToCheck = Adapter->FirstRxDescriptor;
    else
      Adapter->NextRxDescriptorToCheck++;

    LastDescriptorProcessed = CurrentDescriptor;
    CurrentDescriptor = Adapter->NextRxDescriptorToCheck;
  }

 out:
  *want = got;
  return skb_head;
}

static int
e1000_tx_queue(struct device *dev, struct sk_buff *skb)
{
  int ret;

#ifdef CLICK_POLLING
  ret = e1000_xmit_frame_aux(skb, dev, dev->polling == 0);
#else
  ret = e1000_xmit_frame_aux(skb, dev, 1);
#endif
  return(ret);
}

static int
e1000_tx_start(struct device *dev)
{ 
  e1000_tx_eob(dev);
  return 0;
}

int 
e1000_rx_refill(struct device *dev, struct sk_buff **skbs)
{
  bd_config_t *bdp = dev->priv;
  PADAPTER_STRUCT Adapter = (PADAPTER_STRUCT) bdp->bddp;
  int nfilled = 0, di, rtn;
  PE1000_RECEIVE_DESCRIPTOR dp = 0;
  struct sk_buff *skb_list;

  // rtm check
  if (skbs == 0) 
    return (Adapter->NextRxDescriptorToCheck >= 
	    (Adapter->FirstRxDescriptor+Adapter->NextRxIndexToFill))
      ? (Adapter->NextRxDescriptorToCheck -
	 (Adapter->FirstRxDescriptor+Adapter->NextRxIndexToFill))
      : ((Adapter->NextRxDescriptorToCheck+Adapter->NumRxDescriptors) -
	 (Adapter->FirstRxDescriptor+Adapter->NextRxIndexToFill));

  skb_list = *skbs;
  di = Adapter->NextRxIndexToFill;
  while(Adapter->RxSkBuffs[di] == 0 && skb_list != 0L){
    struct sk_buff *skb = skb_list;
    skb_list = skb_list->next;
    // do not use skb_reserve because click expects
    // packets w/ (4,0) alignment: some net cards, like
    // tulip, cannot transfer data on non-4 byte
    // alignment
    // skb_reserve(skb, 2);
    skb->dev = dev;
    Adapter->RxSkBuffs[di] = skb;
    dp = Adapter->FirstRxDescriptor + di;
    dp->BufferAddress = virt_to_bus(skb->tail);
    dp->ReceiveStatus = 0;
    nfilled++;
    di++;
    if(di >= Adapter->NumRxDescriptors)
      di = 0;
  }
  if (skb_list == 0)
    *skbs = 0;
  else
    *skbs = skb_list;

  Adapter->NextRxIndexToFill = di;

  if(nfilled){
    /* Advance the E1000's Receive Queue #0  "Tail Pointer". */
    E1000_WRITE_REG(Rdt0, (((uintptr_t) dp -
                            (uintptr_t) Adapter->FirstRxDescriptor) >> 4));
  }

  // rtm check
  return (Adapter->NextRxDescriptorToCheck >= 
	  (Adapter->FirstRxDescriptor+Adapter->NextRxIndexToFill))
      ? (Adapter->NextRxDescriptorToCheck -
	 (Adapter->FirstRxDescriptor+Adapter->NextRxIndexToFill))
      : ((Adapter->NextRxDescriptorToCheck+Adapter->NumRxDescriptors) -
	 (Adapter->FirstRxDescriptor+Adapter->NextRxIndexToFill));
}

static struct sk_buff *
e1000_tx_clean(struct device *dev)
{
  bd_config_t *bdp = dev->priv;

  return ProcessTransmitInterrupts(bdp, 0);
}

static int
e1000_tx_eob(struct device *dev)
{
  PADAPTER_STRUCT Adapter;
  bd_config_t *bdp;

  bdp = dev->priv;
  Adapter = bdp->bddp;

  /* Advance the Transmit Descriptor Tail (Tdt), this tells the 
   * E1000 that this frame is available to transmit. 
   */
  E1000_WRITE_REG(Tdt, (((unsigned long) Adapter->NextAvailTxDescriptor -
                         (unsigned long) Adapter->FirstTxDescriptor) >> 4));
  return 0;
}


#ifdef MODULE
/* ENTRY POINTS */
EXPORT_SYMBOL(e1000_open);
EXPORT_SYMBOL(e1000_close);
EXPORT_SYMBOL(e1000_xmit_frame);
EXPORT_SYMBOL(e1000_probe);
EXPORT_SYMBOL(e1000_change_mtu);
EXPORT_SYMBOL(e1000_intr);
/* DEBUG */
#endif