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forcedeth.c

/*
 * forcedeth: Ethernet driver for NVIDIA nForce media access controllers.
 *
 * Note: This driver is a cleanroom reimplementation based on reverse
 *      engineered documentation written by Carl-Daniel Hailfinger
 *      and Andrew de Quincey. It's neither supported nor endorsed
 *      by NVIDIA Corp. Use at your own risk.
 *
 * NVIDIA, nForce and other NVIDIA marks are trademarks or registered
 * trademarks of NVIDIA Corporation in the United States and other
 * countries.
 *
 * Copyright (C) 2003,4,5 Manfred Spraul
 * Copyright (C) 2004 Andrew de Quincey (wol support)
 * Copyright (C) 2004 Carl-Daniel Hailfinger (invalid MAC handling, insane
 *          IRQ rate fixes, bigendian fixes, cleanups, verification)
 * Copyright (c) 2004 NVIDIA Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Changelog:
 *    0.01: 05 Oct 2003: First release that compiles without warnings.
 *    0.02: 05 Oct 2003: Fix bug for nv_drain_tx: do not try to free NULL skbs.
 *                   Check all PCI BARs for the register window.
 *                   udelay added to mii_rw.
 *    0.03: 06 Oct 2003: Initialize dev->irq.
 *    0.04: 07 Oct 2003: Initialize np->lock, reduce handled irqs, add printks.
 *    0.05: 09 Oct 2003: printk removed again, irq status print tx_timeout.
 *    0.06: 10 Oct 2003: MAC Address read updated, pff flag generation updated,
 *                   irq mask updated
 *    0.07: 14 Oct 2003: Further irq mask updates.
 *    0.08: 20 Oct 2003: rx_desc.Length initialization added, nv_alloc_rx refill
 *                   added into irq handler, NULL check for drain_ring.
 *    0.09: 20 Oct 2003: Basic link speed irq implementation. Only handle the
 *                   requested interrupt sources.
 *    0.10: 20 Oct 2003: First cleanup for release.
 *    0.11: 21 Oct 2003: hexdump for tx added, rx buffer sizes increased.
 *                   MAC Address init fix, set_multicast cleanup.
 *    0.12: 23 Oct 2003: Cleanups for release.
 *    0.13: 25 Oct 2003: Limit for concurrent tx packets increased to 10.
 *                   Set link speed correctly. start rx before starting
 *                   tx (nv_start_rx sets the link speed).
 *    0.14: 25 Oct 2003: Nic dependant irq mask.
 *    0.15: 08 Nov 2003: fix smp deadlock with set_multicast_list during
 *                   open.
 *    0.16: 15 Nov 2003: include file cleanup for ppc64, rx buffer size
 *                   increased to 1628 bytes.
 *    0.17: 16 Nov 2003: undo rx buffer size increase. Substract 1 from
 *                   the tx length.
 *    0.18: 17 Nov 2003: fix oops due to late initialization of dev_stats
 *    0.19: 29 Nov 2003: Handle RxNoBuf, detect & handle invalid mac
 *                   addresses, really stop rx if already running
 *                   in nv_start_rx, clean up a bit.
 *    0.20: 07 Dec 2003: alloc fixes
 *    0.21: 12 Jan 2004: additional alloc fix, nic polling fix.
 *    0.22: 19 Jan 2004: reprogram timer to a sane rate, avoid lockup
 *                   on close.
 *    0.23: 26 Jan 2004: various small cleanups
 *    0.24: 27 Feb 2004: make driver even less anonymous in backtraces
 *    0.25: 09 Mar 2004: wol support
 *    0.26: 03 Jun 2004: netdriver specific annotation, sparse-related fixes
 *    0.27: 19 Jun 2004: Gigabit support, new descriptor rings,
 *                   added CK804/MCP04 device IDs, code fixes
 *                   for registers, link status and other minor fixes.
 *    0.28: 21 Jun 2004: Big cleanup, making driver mostly endian safe
 *    0.29: 31 Aug 2004: Add backup timer for link change notification.
 *    0.30: 25 Sep 2004: rx checksum support for nf 250 Gb. Add rx reset
 *                   into nv_close, otherwise reenabling for wol can
 *                   cause DMA to kfree'd memory.
 *    0.31: 14 Nov 2004: ethtool support for getting/setting link
 *                   capabilities.
 *    0.32: 16 Apr 2005: RX_ERROR4 handling added.
 *    0.33: 16 May 2005: Support for MCP51 added.
 *    0.34: 18 Jun 2005: Add DEV_NEED_LINKTIMER to all nForce nics.
 *    0.35: 26 Jun 2005: Support for MCP55 added.
 *    0.36: 28 Jun 2005: Add jumbo frame support.
 *    0.37: 10 Jul 2005: Additional ethtool support, cleanup of pci id list
 *    0.38: 16 Jul 2005: tx irq rewrite: Use global flags instead of
 *                   per-packet flags.
 *    0.39: 18 Jul 2005: Add 64bit descriptor support.
 *    0.40: 19 Jul 2005: Add support for mac address change.
 *    0.41: 30 Jul 2005: Write back original MAC in nv_close instead
 *                   of nv_remove
 *    0.42: 06 Aug 2005: Fix lack of link speed initialization
 *                   in the second (and later) nv_open call
 *    0.43: 10 Aug 2005: Add support for tx checksum.
 *    0.44: 20 Aug 2005: Add support for scatter gather and segmentation.
 *    0.45: 18 Sep 2005: Remove nv_stop/start_rx from every link check
 *    0.46: 20 Oct 2005: Add irq optimization modes.
 *    0.47: 26 Oct 2005: Add phyaddr 0 in phy scan.
 *    0.48: 24 Dec 2005: Disable TSO, bugfix for pci_map_single
 *    0.49: 10 Dec 2005: Fix tso for large buffers.
 *    0.50: 20 Jan 2006: Add 8021pq tagging support.
 *    0.51: 20 Jan 2006: Add 64bit consistent memory allocation for rings.
 *    0.52: 20 Jan 2006: Add MSI/MSIX support.
 *    0.53: 19 Mar 2006: Fix init from low power mode and add hw reset.
 *    0.54: 21 Mar 2006: Fix spin locks for multi irqs and cleanup.
 *    0.55: 22 Mar 2006: Add flow control (pause frame).
 *    0.56: 22 Mar 2006: Additional ethtool config and moduleparam support.
 *
 * Known bugs:
 * We suspect that on some hardware no TX done interrupts are generated.
 * This means recovery from netif_stop_queue only happens if the hw timer
 * interrupt fires (100 times/second, configurable with NVREG_POLL_DEFAULT)
 * and the timer is active in the IRQMask, or if a rx packet arrives by chance.
 * If your hardware reliably generates tx done interrupts, then you can remove
 * DEV_NEED_TIMERIRQ from the driver_data flags.
 * DEV_NEED_TIMERIRQ will not harm you on sane hardware, only generating a few
 * superfluous timer interrupts from the nic.
 */
#define FORCEDETH_VERSION           "0.56"
#define DRV_NAME              "forcedeth"

#include <linux/module.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/timer.h>
#include <linux/skbuff.h>
#include <linux/mii.h>
#include <linux/random.h>
#include <linux/init.h>
#include <linux/if_vlan.h>
#include <linux/dma-mapping.h>

#include <asm/irq.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>

#if 0
#define dprintk               printk
#else
#define dprintk(x...)         do { } while (0)
#endif


/*
 * Hardware access:
 */

#define DEV_NEED_TIMERIRQ     0x0001  /* set the timer irq flag in the irq mask */
#define DEV_NEED_LINKTIMER    0x0002      /* poll link settings. Relies on the timer irq */
#define DEV_HAS_LARGEDESC     0x0004      /* device supports jumbo frames and needs packet format 2 */
#define DEV_HAS_HIGH_DMA        0x0008  /* device supports 64bit dma */
#define DEV_HAS_CHECKSUM        0x0010  /* device supports tx and rx checksum offloads */
#define DEV_HAS_VLAN            0x0020  /* device supports vlan tagging and striping */
#define DEV_HAS_MSI             0x0040  /* device supports MSI */
#define DEV_HAS_MSI_X           0x0080  /* device supports MSI-X */
#define DEV_HAS_POWER_CNTRL     0x0100  /* device supports power savings */
#define DEV_HAS_PAUSEFRAME_TX   0x0200  /* device supports tx pause frames */
#define DEV_HAS_STATISTICS      0x0400  /* device supports hw statistics */
#define DEV_HAS_TEST_EXTENDED   0x0800  /* device supports extended diagnostic test */

enum {
      NvRegIrqStatus = 0x000,
#define NVREG_IRQSTAT_MIIEVENT      0x040
#define NVREG_IRQSTAT_MASK          0x1ff
      NvRegIrqMask = 0x004,
#define NVREG_IRQ_RX_ERROR          0x0001
#define NVREG_IRQ_RX                0x0002
#define NVREG_IRQ_RX_NOBUF          0x0004
#define NVREG_IRQ_TX_ERR            0x0008
#define NVREG_IRQ_TX_OK             0x0010
#define NVREG_IRQ_TIMER             0x0020
#define NVREG_IRQ_LINK              0x0040
#define NVREG_IRQ_RX_FORCED         0x0080
#define NVREG_IRQ_TX_FORCED         0x0100
#define NVREG_IRQMASK_THROUGHPUT    0x00df
#define NVREG_IRQMASK_CPU           0x0040
#define NVREG_IRQ_TX_ALL            (NVREG_IRQ_TX_ERR|NVREG_IRQ_TX_OK|NVREG_IRQ_TX_FORCED)
#define NVREG_IRQ_RX_ALL            (NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_RX_FORCED)
#define NVREG_IRQ_OTHER             (NVREG_IRQ_TIMER|NVREG_IRQ_LINK)

#define NVREG_IRQ_UNKNOWN     (~(NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_TX_ERR| \
                              NVREG_IRQ_TX_OK|NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RX_FORCED| \
                              NVREG_IRQ_TX_FORCED))

      NvRegUnknownSetupReg6 = 0x008,
#define NVREG_UNKSETUP6_VAL         3

/*
 * NVREG_POLL_DEFAULT is the interval length of the timer source on the nic
 * NVREG_POLL_DEFAULT=97 would result in an interval length of 1 ms
 */
      NvRegPollingInterval = 0x00c,
#define NVREG_POLL_DEFAULT_THROUGHPUT     970
#define NVREG_POLL_DEFAULT_CPU      13
      NvRegMSIMap0 = 0x020,
      NvRegMSIMap1 = 0x024,
      NvRegMSIIrqMask = 0x030,
#define NVREG_MSI_VECTOR_0_ENABLED 0x01
      NvRegMisc1 = 0x080,
#define NVREG_MISC1_PAUSE_TX  0x01
#define NVREG_MISC1_HD        0x02
#define NVREG_MISC1_FORCE     0x3b0f3c

      NvRegMacReset = 0x3c,
#define NVREG_MAC_RESET_ASSERT      0x0F3
      NvRegTransmitterControl = 0x084,
#define NVREG_XMITCTL_START   0x01
      NvRegTransmitterStatus = 0x088,
#define NVREG_XMITSTAT_BUSY   0x01

      NvRegPacketFilterFlags = 0x8c,
#define NVREG_PFF_PAUSE_RX    0x08
#define NVREG_PFF_ALWAYS      0x7F0000
#define NVREG_PFF_PROMISC     0x80
#define NVREG_PFF_MYADDR      0x20
#define NVREG_PFF_LOOPBACK    0x10

      NvRegOffloadConfig = 0x90,
#define NVREG_OFFLOAD_HOMEPHY 0x601
#define NVREG_OFFLOAD_NORMAL  RX_NIC_BUFSIZE
      NvRegReceiverControl = 0x094,
#define NVREG_RCVCTL_START    0x01
      NvRegReceiverStatus = 0x98,
#define NVREG_RCVSTAT_BUSY    0x01

      NvRegRandomSeed = 0x9c,
#define NVREG_RNDSEED_MASK    0x00ff
#define NVREG_RNDSEED_FORCE   0x7f00
#define NVREG_RNDSEED_FORCE2  0x2d00
#define NVREG_RNDSEED_FORCE3  0x7400

      NvRegTxDeferral = 0xA0,
#define NVREG_TX_DEFERRAL_DEFAULT   0x15050f
#define NVREG_TX_DEFERRAL_RGMII_10_100    0x16070f
#define NVREG_TX_DEFERRAL_RGMII_1000      0x14050f
      NvRegRxDeferral = 0xA4,
#define NVREG_RX_DEFERRAL_DEFAULT   0x16
      NvRegMacAddrA = 0xA8,
      NvRegMacAddrB = 0xAC,
      NvRegMulticastAddrA = 0xB0,
#define NVREG_MCASTADDRA_FORCE      0x01
      NvRegMulticastAddrB = 0xB4,
      NvRegMulticastMaskA = 0xB8,
      NvRegMulticastMaskB = 0xBC,

      NvRegPhyInterface = 0xC0,
#define PHY_RGMII       0x10000000

      NvRegTxRingPhysAddr = 0x100,
      NvRegRxRingPhysAddr = 0x104,
      NvRegRingSizes = 0x108,
#define NVREG_RINGSZ_TXSHIFT 0
#define NVREG_RINGSZ_RXSHIFT 16
      NvRegUnknownTransmitterReg = 0x10c,
      NvRegLinkSpeed = 0x110,
#define NVREG_LINKSPEED_FORCE 0x10000
#define NVREG_LINKSPEED_10    1000
#define NVREG_LINKSPEED_100   100
#define NVREG_LINKSPEED_1000  50
#define NVREG_LINKSPEED_MASK  (0xFFF)
      NvRegUnknownSetupReg5 = 0x130,
#define NVREG_UNKSETUP5_BIT31 (1<<31)
      NvRegTxWatermark = 0x13c,
#define NVREG_TX_WM_DESC1_DEFAULT   0x0200010
#define NVREG_TX_WM_DESC2_3_DEFAULT 0x1e08000
#define NVREG_TX_WM_DESC2_3_1000    0xfe08000
      NvRegTxRxControl = 0x144,
#define NVREG_TXRXCTL_KICK    0x0001
#define NVREG_TXRXCTL_BIT1    0x0002
#define NVREG_TXRXCTL_BIT2    0x0004
#define NVREG_TXRXCTL_IDLE    0x0008
#define NVREG_TXRXCTL_RESET   0x0010
#define NVREG_TXRXCTL_RXCHECK 0x0400
#define NVREG_TXRXCTL_DESC_1  0
#define NVREG_TXRXCTL_DESC_2  0x02100
#define NVREG_TXRXCTL_DESC_3  0x02200
#define NVREG_TXRXCTL_VLANSTRIP 0x00040
#define NVREG_TXRXCTL_VLANINS 0x00080
      NvRegTxRingPhysAddrHigh = 0x148,
      NvRegRxRingPhysAddrHigh = 0x14C,
      NvRegTxPauseFrame = 0x170,
#define NVREG_TX_PAUSEFRAME_DISABLE 0x1ff0080
#define NVREG_TX_PAUSEFRAME_ENABLE  0x0c00030
      NvRegMIIStatus = 0x180,
#define NVREG_MIISTAT_ERROR         0x0001
#define NVREG_MIISTAT_LINKCHANGE    0x0008
#define NVREG_MIISTAT_MASK          0x000f
#define NVREG_MIISTAT_MASK2         0x000f
      NvRegUnknownSetupReg4 = 0x184,
#define NVREG_UNKSETUP4_VAL   8

      NvRegAdapterControl = 0x188,
#define NVREG_ADAPTCTL_START  0x02
#define NVREG_ADAPTCTL_LINKUP 0x04
#define NVREG_ADAPTCTL_PHYVALID     0x40000
#define NVREG_ADAPTCTL_RUNNING      0x100000
#define NVREG_ADAPTCTL_PHYSHIFT     24
      NvRegMIISpeed = 0x18c,
#define NVREG_MIISPEED_BIT8   (1<<8)
#define NVREG_MIIDELAY  5
      NvRegMIIControl = 0x190,
#define NVREG_MIICTL_INUSE    0x08000
#define NVREG_MIICTL_WRITE    0x00400
#define NVREG_MIICTL_ADDRSHIFT      5
      NvRegMIIData = 0x194,
      NvRegWakeUpFlags = 0x200,
#define NVREG_WAKEUPFLAGS_VAL       0x7770
#define NVREG_WAKEUPFLAGS_BUSYSHIFT 24
#define NVREG_WAKEUPFLAGS_ENABLESHIFT     16
#define NVREG_WAKEUPFLAGS_D3SHIFT   12
#define NVREG_WAKEUPFLAGS_D2SHIFT   8
#define NVREG_WAKEUPFLAGS_D1SHIFT   4
#define NVREG_WAKEUPFLAGS_D0SHIFT   0
#define NVREG_WAKEUPFLAGS_ACCEPT_MAGPAT         0x01
#define NVREG_WAKEUPFLAGS_ACCEPT_WAKEUPPAT      0x02
#define NVREG_WAKEUPFLAGS_ACCEPT_LINKCHANGE     0x04
#define NVREG_WAKEUPFLAGS_ENABLE    0x1111

      NvRegPatternCRC = 0x204,
      NvRegPatternMask = 0x208,
      NvRegPowerCap = 0x268,
#define NVREG_POWERCAP_D3SUPP (1<<30)
#define NVREG_POWERCAP_D2SUPP (1<<26)
#define NVREG_POWERCAP_D1SUPP (1<<25)
      NvRegPowerState = 0x26c,
#define NVREG_POWERSTATE_POWEREDUP  0x8000
#define NVREG_POWERSTATE_VALID            0x0100
#define NVREG_POWERSTATE_MASK       0x0003
#define NVREG_POWERSTATE_D0         0x0000
#define NVREG_POWERSTATE_D1         0x0001
#define NVREG_POWERSTATE_D2         0x0002
#define NVREG_POWERSTATE_D3         0x0003
      NvRegTxCnt = 0x280,
      NvRegTxZeroReXmt = 0x284,
      NvRegTxOneReXmt = 0x288,
      NvRegTxManyReXmt = 0x28c,
      NvRegTxLateCol = 0x290,
      NvRegTxUnderflow = 0x294,
      NvRegTxLossCarrier = 0x298,
      NvRegTxExcessDef = 0x29c,
      NvRegTxRetryErr = 0x2a0,
      NvRegRxFrameErr = 0x2a4,
      NvRegRxExtraByte = 0x2a8,
      NvRegRxLateCol = 0x2ac,
      NvRegRxRunt = 0x2b0,
      NvRegRxFrameTooLong = 0x2b4,
      NvRegRxOverflow = 0x2b8,
      NvRegRxFCSErr = 0x2bc,
      NvRegRxFrameAlignErr = 0x2c0,
      NvRegRxLenErr = 0x2c4,
      NvRegRxUnicast = 0x2c8,
      NvRegRxMulticast = 0x2cc,
      NvRegRxBroadcast = 0x2d0,
      NvRegTxDef = 0x2d4,
      NvRegTxFrame = 0x2d8,
      NvRegRxCnt = 0x2dc,
      NvRegTxPause = 0x2e0,
      NvRegRxPause = 0x2e4,
      NvRegRxDropFrame = 0x2e8,
      NvRegVlanControl = 0x300,
#define NVREG_VLANCONTROL_ENABLE    0x2000
      NvRegMSIXMap0 = 0x3e0,
      NvRegMSIXMap1 = 0x3e4,
      NvRegMSIXIrqStatus = 0x3f0,

      NvRegPowerState2 = 0x600,
#define NVREG_POWERSTATE2_POWERUP_MASK          0x0F11
#define NVREG_POWERSTATE2_POWERUP_REV_A3  0x0001
};

/* Big endian: should work, but is untested */
struct ring_desc {
      u32 PacketBuffer;
      u32 FlagLen;
};

struct ring_desc_ex {
      u32 PacketBufferHigh;
      u32 PacketBufferLow;
      u32 TxVlan;
      u32 FlagLen;
};

typedef union _ring_type {
      struct ring_desc* orig;
      struct ring_desc_ex* ex;
} ring_type;

#define FLAG_MASK_V1 0xffff0000
#define FLAG_MASK_V2 0xffffc000
#define LEN_MASK_V1 (0xffffffff ^ FLAG_MASK_V1)
#define LEN_MASK_V2 (0xffffffff ^ FLAG_MASK_V2)

#define NV_TX_LASTPACKET      (1<<16)
#define NV_TX_RETRYERROR      (1<<19)
#define NV_TX_FORCED_INTERRUPT      (1<<24)
#define NV_TX_DEFERRED        (1<<26)
#define NV_TX_CARRIERLOST     (1<<27)
#define NV_TX_LATECOLLISION   (1<<28)
#define NV_TX_UNDERFLOW       (1<<29)
#define NV_TX_ERROR           (1<<30)
#define NV_TX_VALID           (1<<31)

#define NV_TX2_LASTPACKET     (1<<29)
#define NV_TX2_RETRYERROR     (1<<18)
#define NV_TX2_FORCED_INTERRUPT     (1<<30)
#define NV_TX2_DEFERRED       (1<<25)
#define NV_TX2_CARRIERLOST    (1<<26)
#define NV_TX2_LATECOLLISION  (1<<27)
#define NV_TX2_UNDERFLOW      (1<<28)
/* error and valid are the same for both */
#define NV_TX2_ERROR          (1<<30)
#define NV_TX2_VALID          (1<<31)
#define NV_TX2_TSO            (1<<28)
#define NV_TX2_TSO_SHIFT      14
#define NV_TX2_TSO_MAX_SHIFT  14
#define NV_TX2_TSO_MAX_SIZE   (1<<NV_TX2_TSO_MAX_SHIFT)
#define NV_TX2_CHECKSUM_L3    (1<<27)
#define NV_TX2_CHECKSUM_L4    (1<<26)

#define NV_TX3_VLAN_TAG_PRESENT (1<<18)

#define NV_RX_DESCRIPTORVALID (1<<16)
#define NV_RX_MISSEDFRAME     (1<<17)
#define NV_RX_SUBSTRACT1      (1<<18)
#define NV_RX_ERROR1          (1<<23)
#define NV_RX_ERROR2          (1<<24)
#define NV_RX_ERROR3          (1<<25)
#define NV_RX_ERROR4          (1<<26)
#define NV_RX_CRCERR          (1<<27)
#define NV_RX_OVERFLOW        (1<<28)
#define NV_RX_FRAMINGERR      (1<<29)
#define NV_RX_ERROR           (1<<30)
#define NV_RX_AVAIL           (1<<31)

#define NV_RX2_CHECKSUMMASK   (0x1C000000)
#define NV_RX2_CHECKSUMOK1    (0x10000000)
#define NV_RX2_CHECKSUMOK2    (0x14000000)
#define NV_RX2_CHECKSUMOK3    (0x18000000)
#define NV_RX2_DESCRIPTORVALID      (1<<29)
#define NV_RX2_SUBSTRACT1     (1<<25)
#define NV_RX2_ERROR1         (1<<18)
#define NV_RX2_ERROR2         (1<<19)
#define NV_RX2_ERROR3         (1<<20)
#define NV_RX2_ERROR4         (1<<21)
#define NV_RX2_CRCERR         (1<<22)
#define NV_RX2_OVERFLOW       (1<<23)
#define NV_RX2_FRAMINGERR     (1<<24)
/* error and avail are the same for both */
#define NV_RX2_ERROR          (1<<30)
#define NV_RX2_AVAIL          (1<<31)

#define NV_RX3_VLAN_TAG_PRESENT (1<<16)
#define NV_RX3_VLAN_TAG_MASK  (0x0000FFFF)

/* Miscelaneous hardware related defines: */
#define NV_PCI_REGSZ_VER1           0x270
#define NV_PCI_REGSZ_VER2           0x604

/* various timeout delays: all in usec */
#define NV_TXRX_RESET_DELAY   4
#define NV_TXSTOP_DELAY1      10
#define NV_TXSTOP_DELAY1MAX   500000
#define NV_TXSTOP_DELAY2      100
#define NV_RXSTOP_DELAY1      10
#define NV_RXSTOP_DELAY1MAX   500000
#define NV_RXSTOP_DELAY2      100
#define NV_SETUP5_DELAY       5
#define NV_SETUP5_DELAYMAX    50000
#define NV_POWERUP_DELAY      5
#define NV_POWERUP_DELAYMAX   5000
#define NV_MIIBUSY_DELAY      50
#define NV_MIIPHY_DELAY 10
#define NV_MIIPHY_DELAYMAX    10000
#define NV_MAC_RESET_DELAY    64

#define NV_WAKEUPPATTERNS     5
#define NV_WAKEUPMASKENTRIES  4

/* General driver defaults */
#define NV_WATCHDOG_TIMEO     (5*HZ)

#define RX_RING_DEFAULT       128
#define TX_RING_DEFAULT       256
#define RX_RING_MIN           128
#define TX_RING_MIN           64
#define RING_MAX_DESC_VER_1   1024
#define RING_MAX_DESC_VER_2_3 16384
/*
 * Difference between the get and put pointers for the tx ring.
 * This is used to throttle the amount of data outstanding in the
 * tx ring.
 */
#define TX_LIMIT_DIFFERENCE   1

/* rx/tx mac addr + type + vlan + align + slack*/
#define NV_RX_HEADERS         (64)
/* even more slack. */
#define NV_RX_ALLOC_PAD       (64)

/* maximum mtu size */
#define NV_PKTLIMIT_1   ETH_DATA_LEN      /* hard limit not known */
#define NV_PKTLIMIT_2   9100  /* Actual limit according to NVidia: 9202 */

#define OOM_REFILL      (1+HZ/20)
#define POLL_WAIT (1+HZ/100)
#define LINK_TIMEOUT    (3*HZ)
#define STATS_INTERVAL  (10*HZ)

/*
 * desc_ver values:
 * The nic supports three different descriptor types:
 * - DESC_VER_1: Original
 * - DESC_VER_2: support for jumbo frames.
 * - DESC_VER_3: 64-bit format.
 */
#define DESC_VER_1      1
#define DESC_VER_2      2
#define DESC_VER_3      3

/* PHY defines */
#define PHY_OUI_MARVELL 0x5043
#define PHY_OUI_CICADA  0x03f1
#define PHYID1_OUI_MASK 0x03ff
#define PHYID1_OUI_SHFT 6
#define PHYID2_OUI_MASK 0xfc00
#define PHYID2_OUI_SHFT 10
#define PHY_INIT1 0x0f000
#define PHY_INIT2 0x0e00
#define PHY_INIT3 0x01000
#define PHY_INIT4 0x0200
#define PHY_INIT5 0x0004
#define PHY_INIT6 0x02000
#define PHY_GIGABIT     0x0100

#define PHY_TIMEOUT     0x1
#define PHY_ERROR 0x2

#define PHY_100   0x1
#define PHY_1000  0x2
#define PHY_HALF  0x100

#define NV_PAUSEFRAME_RX_CAPABLE 0x0001
#define NV_PAUSEFRAME_TX_CAPABLE 0x0002
#define NV_PAUSEFRAME_RX_ENABLE  0x0004
#define NV_PAUSEFRAME_TX_ENABLE  0x0008
#define NV_PAUSEFRAME_RX_REQ     0x0010
#define NV_PAUSEFRAME_TX_REQ     0x0020
#define NV_PAUSEFRAME_AUTONEG    0x0040

/* MSI/MSI-X defines */
#define NV_MSI_X_MAX_VECTORS  8
#define NV_MSI_X_VECTORS_MASK 0x000f
#define NV_MSI_CAPABLE        0x0010
#define NV_MSI_X_CAPABLE      0x0020
#define NV_MSI_ENABLED        0x0040
#define NV_MSI_X_ENABLED      0x0080

#define NV_MSI_X_VECTOR_ALL   0x0
#define NV_MSI_X_VECTOR_RX    0x0
#define NV_MSI_X_VECTOR_TX    0x1
#define NV_MSI_X_VECTOR_OTHER 0x2

/* statistics */
struct nv_ethtool_str {
      char name[ETH_GSTRING_LEN];
};

static const struct nv_ethtool_str nv_estats_str[] = {
      { "tx_bytes" },
      { "tx_zero_rexmt" },
      { "tx_one_rexmt" },
      { "tx_many_rexmt" },
      { "tx_late_collision" },
      { "tx_fifo_errors" },
      { "tx_carrier_errors" },
      { "tx_excess_deferral" },
      { "tx_retry_error" },
      { "tx_deferral" },
      { "tx_packets" },
      { "tx_pause" },
      { "rx_frame_error" },
      { "rx_extra_byte" },
      { "rx_late_collision" },
      { "rx_runt" },
      { "rx_frame_too_long" },
      { "rx_over_errors" },
      { "rx_crc_errors" },
      { "rx_frame_align_error" },
      { "rx_length_error" },
      { "rx_unicast" },
      { "rx_multicast" },
      { "rx_broadcast" },
      { "rx_bytes" },
      { "rx_pause" },
      { "rx_drop_frame" },
      { "rx_packets" },
      { "rx_errors_total" }
};

struct nv_ethtool_stats {
      u64 tx_bytes;
      u64 tx_zero_rexmt;
      u64 tx_one_rexmt;
      u64 tx_many_rexmt;
      u64 tx_late_collision;
      u64 tx_fifo_errors;
      u64 tx_carrier_errors;
      u64 tx_excess_deferral;
      u64 tx_retry_error;
      u64 tx_deferral;
      u64 tx_packets;
      u64 tx_pause;
      u64 rx_frame_error;
      u64 rx_extra_byte;
      u64 rx_late_collision;
      u64 rx_runt;
      u64 rx_frame_too_long;
      u64 rx_over_errors;
      u64 rx_crc_errors;
      u64 rx_frame_align_error;
      u64 rx_length_error;
      u64 rx_unicast;
      u64 rx_multicast;
      u64 rx_broadcast;
      u64 rx_bytes;
      u64 rx_pause;
      u64 rx_drop_frame;
      u64 rx_packets;
      u64 rx_errors_total;
};

/* diagnostics */
#define NV_TEST_COUNT_BASE 3
#define NV_TEST_COUNT_EXTENDED 4

static const struct nv_ethtool_str nv_etests_str[] = {
      { "link      (online/offline)" },
      { "register  (offline)       " },
      { "interrupt (offline)       " },
      { "loopback  (offline)       " }
};

struct register_test {
      u32 reg;
      u32 mask;
};

static const struct register_test nv_registers_test[] = {
      { NvRegUnknownSetupReg6, 0x01 },
      { NvRegMisc1, 0x03c },
      { NvRegOffloadConfig, 0x03ff },
      { NvRegMulticastAddrA, 0xffffffff },
      { NvRegTxWatermark, 0x0ff },
      { NvRegWakeUpFlags, 0x07777 },
      { 0,0 }
};

/*
 * SMP locking:
 * All hardware access under dev->priv->lock, except the performance
 * critical parts:
 * - rx is (pseudo-) lockless: it relies on the single-threading provided
 *    by the arch code for interrupts.
 * - tx setup is lockless: it relies on netif_tx_lock. Actual submission
 *    needs dev->priv->lock :-(
 * - set_multicast_list: preparation lockless, relies on netif_tx_lock.
 */

/* in dev: base, irq */
struct fe_priv {
      spinlock_t lock;

      /* General data:
       * Locking: spin_lock(&np->lock); */
      struct net_device_stats stats;
      struct nv_ethtool_stats estats;
      int in_shutdown;
      u32 linkspeed;
      int duplex;
      int autoneg;
      int fixed_mode;
      int phyaddr;
      int wolenabled;
      unsigned int phy_oui;
      u16 gigabit;
      int intr_test;

      /* General data: RO fields */
      dma_addr_t ring_addr;
      struct pci_dev *pci_dev;
      u32 orig_mac[2];
      u32 irqmask;
      u32 desc_ver;
      u32 txrxctl_bits;
      u32 vlanctl_bits;
      u32 driver_data;
      u32 register_size;

      void __iomem *base;

      /* rx specific fields.
       * Locking: Within irq hander or disable_irq+spin_lock(&np->lock);
       */
      ring_type rx_ring;
      unsigned int cur_rx, refill_rx;
      struct sk_buff **rx_skbuff;
      dma_addr_t *rx_dma;
      unsigned int rx_buf_sz;
      unsigned int pkt_limit;
      struct timer_list oom_kick;
      struct timer_list nic_poll;
      struct timer_list stats_poll;
      u32 nic_poll_irq;
      int rx_ring_size;

      /* media detection workaround.
       * Locking: Within irq hander or disable_irq+spin_lock(&np->lock);
       */
      int need_linktimer;
      unsigned long link_timeout;
      /*
       * tx specific fields.
       */
      ring_type tx_ring;
      unsigned int next_tx, nic_tx;
      struct sk_buff **tx_skbuff;
      dma_addr_t *tx_dma;
      unsigned int *tx_dma_len;
      u32 tx_flags;
      int tx_ring_size;
      int tx_limit_start;
      int tx_limit_stop;

      /* vlan fields */
      struct vlan_group *vlangrp;

      /* msi/msi-x fields */
      u32 msi_flags;
      struct msix_entry msi_x_entry[NV_MSI_X_MAX_VECTORS];

      /* flow control */
      u32 pause_flags;
};

/*
 * Maximum number of loops until we assume that a bit in the irq mask
 * is stuck. Overridable with module param.
 */
static int max_interrupt_work = 5;

/*
 * Optimization can be either throuput mode or cpu mode
 *
 * Throughput Mode: Every tx and rx packet will generate an interrupt.
 * CPU Mode: Interrupts are controlled by a timer.
 */
enum {
      NV_OPTIMIZATION_MODE_THROUGHPUT,
      NV_OPTIMIZATION_MODE_CPU
};
static int optimization_mode = NV_OPTIMIZATION_MODE_THROUGHPUT;

/*
 * Poll interval for timer irq
 *
 * This interval determines how frequent an interrupt is generated.
 * The is value is determined by [(time_in_micro_secs * 100) / (2^10)]
 * Min = 0, and Max = 65535
 */
static int poll_interval = -1;

/*
 * MSI interrupts
 */
enum {
      NV_MSI_INT_DISABLED,
      NV_MSI_INT_ENABLED
};
static int msi = NV_MSI_INT_ENABLED;

/*
 * MSIX interrupts
 */
enum {
      NV_MSIX_INT_DISABLED,
      NV_MSIX_INT_ENABLED
};
static int msix = NV_MSIX_INT_ENABLED;

/*
 * DMA 64bit
 */
enum {
      NV_DMA_64BIT_DISABLED,
      NV_DMA_64BIT_ENABLED
};
static int dma_64bit = NV_DMA_64BIT_ENABLED;

static inline struct fe_priv *get_nvpriv(struct net_device *dev)
{
      return netdev_priv(dev);
}

static inline u8 __iomem *get_hwbase(struct net_device *dev)
{
      return ((struct fe_priv *)netdev_priv(dev))->base;
}

static inline void pci_push(u8 __iomem *base)
{
      /* force out pending posted writes */
      readl(base);
}

static inline u32 nv_descr_getlength(struct ring_desc *prd, u32 v)
{
      return le32_to_cpu(prd->FlagLen)
            & ((v == DESC_VER_1) ? LEN_MASK_V1 : LEN_MASK_V2);
}

static inline u32 nv_descr_getlength_ex(struct ring_desc_ex *prd, u32 v)
{
      return le32_to_cpu(prd->FlagLen) & LEN_MASK_V2;
}

static int reg_delay(struct net_device *dev, int offset, u32 mask, u32 target,
                        int delay, int delaymax, const char *msg)
{
      u8 __iomem *base = get_hwbase(dev);

      pci_push(base);
      do {
            udelay(delay);
            delaymax -= delay;
            if (delaymax < 0) {
                  if (msg)
                        printk(msg);
                  return 1;
            }
      } while ((readl(base + offset) & mask) != target);
      return 0;
}

#define NV_SETUP_RX_RING 0x01
#define NV_SETUP_TX_RING 0x02

static void setup_hw_rings(struct net_device *dev, int rxtx_flags)
{
      struct fe_priv *np = get_nvpriv(dev);
      u8 __iomem *base = get_hwbase(dev);

      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            if (rxtx_flags & NV_SETUP_RX_RING) {
                  writel((u32) cpu_to_le64(np->ring_addr), base + NvRegRxRingPhysAddr);
            }
            if (rxtx_flags & NV_SETUP_TX_RING) {
                  writel((u32) cpu_to_le64(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
            }
      } else {
            if (rxtx_flags & NV_SETUP_RX_RING) {
                  writel((u32) cpu_to_le64(np->ring_addr), base + NvRegRxRingPhysAddr);
                  writel((u32) (cpu_to_le64(np->ring_addr) >> 32), base + NvRegRxRingPhysAddrHigh);
            }
            if (rxtx_flags & NV_SETUP_TX_RING) {
                  writel((u32) cpu_to_le64(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc_ex)), base + NvRegTxRingPhysAddr);
                  writel((u32) (cpu_to_le64(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc_ex)) >> 32), base + NvRegTxRingPhysAddrHigh);
            }
      }
}

static void free_rings(struct net_device *dev)
{
      struct fe_priv *np = get_nvpriv(dev);

      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            if(np->rx_ring.orig)
                  pci_free_consistent(np->pci_dev, sizeof(struct ring_desc) * (np->rx_ring_size + np->tx_ring_size),
                                  np->rx_ring.orig, np->ring_addr);
      } else {
            if (np->rx_ring.ex)
                  pci_free_consistent(np->pci_dev, sizeof(struct ring_desc_ex) * (np->rx_ring_size + np->tx_ring_size),
                                  np->rx_ring.ex, np->ring_addr);
      }
      if (np->rx_skbuff)
            kfree(np->rx_skbuff);
      if (np->rx_dma)
            kfree(np->rx_dma);
      if (np->tx_skbuff)
            kfree(np->tx_skbuff);
      if (np->tx_dma)
            kfree(np->tx_dma);
      if (np->tx_dma_len)
            kfree(np->tx_dma_len);
}

static int using_multi_irqs(struct net_device *dev)
{
      struct fe_priv *np = get_nvpriv(dev);

      if (!(np->msi_flags & NV_MSI_X_ENABLED) ||
          ((np->msi_flags & NV_MSI_X_ENABLED) &&
           ((np->msi_flags & NV_MSI_X_VECTORS_MASK) == 0x1)))
            return 0;
      else
            return 1;
}

static void nv_enable_irq(struct net_device *dev)
{
      struct fe_priv *np = get_nvpriv(dev);

      if (!using_multi_irqs(dev)) {
            if (np->msi_flags & NV_MSI_X_ENABLED)
                  enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
            else
                  enable_irq(dev->irq);
      } else {
            enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
            enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector);
            enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector);
      }
}

static void nv_disable_irq(struct net_device *dev)
{
      struct fe_priv *np = get_nvpriv(dev);

      if (!using_multi_irqs(dev)) {
            if (np->msi_flags & NV_MSI_X_ENABLED)
                  disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
            else
                  disable_irq(dev->irq);
      } else {
            disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
            disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector);
            disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector);
      }
}

/* In MSIX mode, a write to irqmask behaves as XOR */
static void nv_enable_hw_interrupts(struct net_device *dev, u32 mask)
{
      u8 __iomem *base = get_hwbase(dev);

      writel(mask, base + NvRegIrqMask);
}

static void nv_disable_hw_interrupts(struct net_device *dev, u32 mask)
{
      struct fe_priv *np = get_nvpriv(dev);
      u8 __iomem *base = get_hwbase(dev);

      if (np->msi_flags & NV_MSI_X_ENABLED) {
            writel(mask, base + NvRegIrqMask);
      } else {
            if (np->msi_flags & NV_MSI_ENABLED)
                  writel(0, base + NvRegMSIIrqMask);
            writel(0, base + NvRegIrqMask);
      }
}

#define MII_READ  (-1)
/* mii_rw: read/write a register on the PHY.
 *
 * Caller must guarantee serialization
 */
static int mii_rw(struct net_device *dev, int addr, int miireg, int value)
{
      u8 __iomem *base = get_hwbase(dev);
      u32 reg;
      int retval;

      writel(NVREG_MIISTAT_MASK, base + NvRegMIIStatus);

      reg = readl(base + NvRegMIIControl);
      if (reg & NVREG_MIICTL_INUSE) {
            writel(NVREG_MIICTL_INUSE, base + NvRegMIIControl);
            udelay(NV_MIIBUSY_DELAY);
      }

      reg = (addr << NVREG_MIICTL_ADDRSHIFT) | miireg;
      if (value != MII_READ) {
            writel(value, base + NvRegMIIData);
            reg |= NVREG_MIICTL_WRITE;
      }
      writel(reg, base + NvRegMIIControl);

      if (reg_delay(dev, NvRegMIIControl, NVREG_MIICTL_INUSE, 0,
                  NV_MIIPHY_DELAY, NV_MIIPHY_DELAYMAX, NULL)) {
            dprintk(KERN_DEBUG "%s: mii_rw of reg %d at PHY %d timed out.\n",
                        dev->name, miireg, addr);
            retval = -1;
      } else if (value != MII_READ) {
            /* it was a write operation - fewer failures are detectable */
            dprintk(KERN_DEBUG "%s: mii_rw wrote 0x%x to reg %d at PHY %d\n",
                        dev->name, value, miireg, addr);
            retval = 0;
      } else if (readl(base + NvRegMIIStatus) & NVREG_MIISTAT_ERROR) {
            dprintk(KERN_DEBUG "%s: mii_rw of reg %d at PHY %d failed.\n",
                        dev->name, miireg, addr);
            retval = -1;
      } else {
            retval = readl(base + NvRegMIIData);
            dprintk(KERN_DEBUG "%s: mii_rw read from reg %d at PHY %d: 0x%x.\n",
                        dev->name, miireg, addr, retval);
      }

      return retval;
}

static int phy_reset(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u32 miicontrol;
      unsigned int tries = 0;

      miicontrol = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
      miicontrol |= BMCR_RESET;
      if (mii_rw(dev, np->phyaddr, MII_BMCR, miicontrol)) {
            return -1;
      }

      /* wait for 500ms */
      msleep(500);

      /* must wait till reset is deasserted */
      while (miicontrol & BMCR_RESET) {
            msleep(10);
            miicontrol = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
            /* FIXME: 100 tries seem excessive */
            if (tries++ > 100)
                  return -1;
      }
      return 0;
}

static int phy_init(struct net_device *dev)
{
      struct fe_priv *np = get_nvpriv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 phyinterface, phy_reserved, mii_status, mii_control, mii_control_1000,reg;

      /* set advertise register */
      reg = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
      reg |= (ADVERTISE_10HALF|ADVERTISE_10FULL|ADVERTISE_100HALF|ADVERTISE_100FULL|ADVERTISE_PAUSE_ASYM|ADVERTISE_PAUSE_CAP);
      if (mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg)) {
            printk(KERN_INFO "%s: phy write to advertise failed.\n", pci_name(np->pci_dev));
            return PHY_ERROR;
      }

      /* get phy interface type */
      phyinterface = readl(base + NvRegPhyInterface);

      /* see if gigabit phy */
      mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
      if (mii_status & PHY_GIGABIT) {
            np->gigabit = PHY_GIGABIT;
            mii_control_1000 = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
            mii_control_1000 &= ~ADVERTISE_1000HALF;
            if (phyinterface & PHY_RGMII)
                  mii_control_1000 |= ADVERTISE_1000FULL;
            else
                  mii_control_1000 &= ~ADVERTISE_1000FULL;

            if (mii_rw(dev, np->phyaddr, MII_CTRL1000, mii_control_1000)) {
                  printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev));
                  return PHY_ERROR;
            }
      }
      else
            np->gigabit = 0;

      /* reset the phy */
      if (phy_reset(dev)) {
            printk(KERN_INFO "%s: phy reset failed\n", pci_name(np->pci_dev));
            return PHY_ERROR;
      }

      /* phy vendor specific configuration */
      if ((np->phy_oui == PHY_OUI_CICADA) && (phyinterface & PHY_RGMII) ) {
            phy_reserved = mii_rw(dev, np->phyaddr, MII_RESV1, MII_READ);
            phy_reserved &= ~(PHY_INIT1 | PHY_INIT2);
            phy_reserved |= (PHY_INIT3 | PHY_INIT4);
            if (mii_rw(dev, np->phyaddr, MII_RESV1, phy_reserved)) {
                  printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev));
                  return PHY_ERROR;
            }
            phy_reserved = mii_rw(dev, np->phyaddr, MII_NCONFIG, MII_READ);
            phy_reserved |= PHY_INIT5;
            if (mii_rw(dev, np->phyaddr, MII_NCONFIG, phy_reserved)) {
                  printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev));
                  return PHY_ERROR;
            }
      }
      if (np->phy_oui == PHY_OUI_CICADA) {
            phy_reserved = mii_rw(dev, np->phyaddr, MII_SREVISION, MII_READ);
            phy_reserved |= PHY_INIT6;
            if (mii_rw(dev, np->phyaddr, MII_SREVISION, phy_reserved)) {
                  printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev));
                  return PHY_ERROR;
            }
      }
      /* some phys clear out pause advertisment on reset, set it back */
      mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg);

      /* restart auto negotiation */
      mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
      mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE);
      if (mii_rw(dev, np->phyaddr, MII_BMCR, mii_control)) {
            return PHY_ERROR;
      }

      return 0;
}

static void nv_start_rx(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);

      dprintk(KERN_DEBUG "%s: nv_start_rx\n", dev->name);
      /* Already running? Stop it. */
      if (readl(base + NvRegReceiverControl) & NVREG_RCVCTL_START) {
            writel(0, base + NvRegReceiverControl);
            pci_push(base);
      }
      writel(np->linkspeed, base + NvRegLinkSpeed);
      pci_push(base);
      writel(NVREG_RCVCTL_START, base + NvRegReceiverControl);
      dprintk(KERN_DEBUG "%s: nv_start_rx to duplex %d, speed 0x%08x.\n",
                        dev->name, np->duplex, np->linkspeed);
      pci_push(base);
}

static void nv_stop_rx(struct net_device *dev)
{
      u8 __iomem *base = get_hwbase(dev);

      dprintk(KERN_DEBUG "%s: nv_stop_rx\n", dev->name);
      writel(0, base + NvRegReceiverControl);
      reg_delay(dev, NvRegReceiverStatus, NVREG_RCVSTAT_BUSY, 0,
                  NV_RXSTOP_DELAY1, NV_RXSTOP_DELAY1MAX,
                  KERN_INFO "nv_stop_rx: ReceiverStatus remained busy");

      udelay(NV_RXSTOP_DELAY2);
      writel(0, base + NvRegLinkSpeed);
}

static void nv_start_tx(struct net_device *dev)
{
      u8 __iomem *base = get_hwbase(dev);

      dprintk(KERN_DEBUG "%s: nv_start_tx\n", dev->name);
      writel(NVREG_XMITCTL_START, base + NvRegTransmitterControl);
      pci_push(base);
}

static void nv_stop_tx(struct net_device *dev)
{
      u8 __iomem *base = get_hwbase(dev);

      dprintk(KERN_DEBUG "%s: nv_stop_tx\n", dev->name);
      writel(0, base + NvRegTransmitterControl);
      reg_delay(dev, NvRegTransmitterStatus, NVREG_XMITSTAT_BUSY, 0,
                  NV_TXSTOP_DELAY1, NV_TXSTOP_DELAY1MAX,
                  KERN_INFO "nv_stop_tx: TransmitterStatus remained busy");

      udelay(NV_TXSTOP_DELAY2);
      writel(0, base + NvRegUnknownTransmitterReg);
}

static void nv_txrx_reset(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);

      dprintk(KERN_DEBUG "%s: nv_txrx_reset\n", dev->name);
      writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl);
      pci_push(base);
      udelay(NV_TXRX_RESET_DELAY);
      writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl);
      pci_push(base);
}

static void nv_mac_reset(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);

      dprintk(KERN_DEBUG "%s: nv_mac_reset\n", dev->name);
      writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl);
      pci_push(base);
      writel(NVREG_MAC_RESET_ASSERT, base + NvRegMacReset);
      pci_push(base);
      udelay(NV_MAC_RESET_DELAY);
      writel(0, base + NvRegMacReset);
      pci_push(base);
      udelay(NV_MAC_RESET_DELAY);
      writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl);
      pci_push(base);
}

/*
 * nv_get_stats: dev->get_stats function
 * Get latest stats value from the nic.
 * Called with read_lock(&dev_base_lock) held for read -
 * only synchronized against unregister_netdevice.
 */
static struct net_device_stats *nv_get_stats(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);

      /* It seems that the nic always generates interrupts and doesn't
       * accumulate errors internally. Thus the current values in np->stats
       * are already up to date.
       */
      return &np->stats;
}

/*
 * nv_alloc_rx: fill rx ring entries.
 * Return 1 if the allocations for the skbs failed and the
 * rx engine is without Available descriptors
 */
static int nv_alloc_rx(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      unsigned int refill_rx = np->refill_rx;
      int nr;

      while (np->cur_rx != refill_rx) {
            struct sk_buff *skb;

            nr = refill_rx % np->rx_ring_size;
            if (np->rx_skbuff[nr] == NULL) {

                  skb = dev_alloc_skb(np->rx_buf_sz + NV_RX_ALLOC_PAD);
                  if (!skb)
                        break;

                  skb->dev = dev;
                  np->rx_skbuff[nr] = skb;
            } else {
                  skb = np->rx_skbuff[nr];
            }
            np->rx_dma[nr] = pci_map_single(np->pci_dev, skb->data,
                              skb->end-skb->data, PCI_DMA_FROMDEVICE);
            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
                  np->rx_ring.orig[nr].PacketBuffer = cpu_to_le32(np->rx_dma[nr]);
                  wmb();
                  np->rx_ring.orig[nr].FlagLen = cpu_to_le32(np->rx_buf_sz | NV_RX_AVAIL);
            } else {
                  np->rx_ring.ex[nr].PacketBufferHigh = cpu_to_le64(np->rx_dma[nr]) >> 32;
                  np->rx_ring.ex[nr].PacketBufferLow = cpu_to_le64(np->rx_dma[nr]) & 0x0FFFFFFFF;
                  wmb();
                  np->rx_ring.ex[nr].FlagLen = cpu_to_le32(np->rx_buf_sz | NV_RX2_AVAIL);
            }
            dprintk(KERN_DEBUG "%s: nv_alloc_rx: Packet %d marked as Available\n",
                              dev->name, refill_rx);
            refill_rx++;
      }
      np->refill_rx = refill_rx;
      if (np->cur_rx - refill_rx == np->rx_ring_size)
            return 1;
      return 0;
}

static void nv_do_rx_refill(unsigned long data)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);

      if (!using_multi_irqs(dev)) {
            if (np->msi_flags & NV_MSI_X_ENABLED)
                  disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
            else
                  disable_irq(dev->irq);
      } else {
            disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
      }
      if (nv_alloc_rx(dev)) {
            spin_lock_irq(&np->lock);
            if (!np->in_shutdown)
                  mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
            spin_unlock_irq(&np->lock);
      }
      if (!using_multi_irqs(dev)) {
            if (np->msi_flags & NV_MSI_X_ENABLED)
                  enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
            else
                  enable_irq(dev->irq);
      } else {
            enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
      }
}

static void nv_init_rx(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      int i;

      np->cur_rx = np->rx_ring_size;
      np->refill_rx = 0;
      for (i = 0; i < np->rx_ring_size; i++)
            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
                  np->rx_ring.orig[i].FlagLen = 0;
              else
                  np->rx_ring.ex[i].FlagLen = 0;
}

static void nv_init_tx(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      int i;

      np->next_tx = np->nic_tx = 0;
      for (i = 0; i < np->tx_ring_size; i++) {
            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
                  np->tx_ring.orig[i].FlagLen = 0;
              else
                  np->tx_ring.ex[i].FlagLen = 0;
            np->tx_skbuff[i] = NULL;
            np->tx_dma[i] = 0;
      }
}

static int nv_init_ring(struct net_device *dev)
{
      nv_init_tx(dev);
      nv_init_rx(dev);
      return nv_alloc_rx(dev);
}

static int nv_release_txskb(struct net_device *dev, unsigned int skbnr)
{
      struct fe_priv *np = netdev_priv(dev);

      dprintk(KERN_INFO "%s: nv_release_txskb for skbnr %d\n",
            dev->name, skbnr);

      if (np->tx_dma[skbnr]) {
            pci_unmap_page(np->pci_dev, np->tx_dma[skbnr],
                         np->tx_dma_len[skbnr],
                         PCI_DMA_TODEVICE);
            np->tx_dma[skbnr] = 0;
      }

      if (np->tx_skbuff[skbnr]) {
            dev_kfree_skb_any(np->tx_skbuff[skbnr]);
            np->tx_skbuff[skbnr] = NULL;
            return 1;
      } else {
            return 0;
      }
}

static void nv_drain_tx(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      unsigned int i;

      for (i = 0; i < np->tx_ring_size; i++) {
            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
                  np->tx_ring.orig[i].FlagLen = 0;
            else
                  np->tx_ring.ex[i].FlagLen = 0;
            if (nv_release_txskb(dev, i))
                  np->stats.tx_dropped++;
      }
}

static void nv_drain_rx(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      int i;
      for (i = 0; i < np->rx_ring_size; i++) {
            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
                  np->rx_ring.orig[i].FlagLen = 0;
            else
                  np->rx_ring.ex[i].FlagLen = 0;
            wmb();
            if (np->rx_skbuff[i]) {
                  pci_unmap_single(np->pci_dev, np->rx_dma[i],
                                    np->rx_skbuff[i]->end-np->rx_skbuff[i]->data,
                                    PCI_DMA_FROMDEVICE);
                  dev_kfree_skb(np->rx_skbuff[i]);
                  np->rx_skbuff[i] = NULL;
            }
      }
}

static void drain_ring(struct net_device *dev)
{
      nv_drain_tx(dev);
      nv_drain_rx(dev);
}

/*
 * nv_start_xmit: dev->hard_start_xmit function
 * Called with netif_tx_lock held.
 */
static int nv_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u32 tx_flags = 0;
      u32 tx_flags_extra = (np->desc_ver == DESC_VER_1 ? NV_TX_LASTPACKET : NV_TX2_LASTPACKET);
      unsigned int fragments = skb_shinfo(skb)->nr_frags;
      unsigned int nr = (np->next_tx - 1) % np->tx_ring_size;
      unsigned int start_nr = np->next_tx % np->tx_ring_size;
      unsigned int i;
      u32 offset = 0;
      u32 bcnt;
      u32 size = skb->len-skb->data_len;
      u32 entries = (size >> NV_TX2_TSO_MAX_SHIFT) + ((size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0);
      u32 tx_flags_vlan = 0;

      /* add fragments to entries count */
      for (i = 0; i < fragments; i++) {
            entries += (skb_shinfo(skb)->frags[i].size >> NV_TX2_TSO_MAX_SHIFT) +
                     ((skb_shinfo(skb)->frags[i].size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0);
      }

      spin_lock_irq(&np->lock);

      if ((np->next_tx - np->nic_tx + entries - 1) > np->tx_limit_stop) {
            spin_unlock_irq(&np->lock);
            netif_stop_queue(dev);
            return NETDEV_TX_BUSY;
      }

      /* setup the header buffer */
      do {
            bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size;
            nr = (nr + 1) % np->tx_ring_size;

            np->tx_dma[nr] = pci_map_single(np->pci_dev, skb->data + offset, bcnt,
                                    PCI_DMA_TODEVICE);
            np->tx_dma_len[nr] = bcnt;

            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
                  np->tx_ring.orig[nr].PacketBuffer = cpu_to_le32(np->tx_dma[nr]);
                  np->tx_ring.orig[nr].FlagLen = cpu_to_le32((bcnt-1) | tx_flags);
            } else {
                  np->tx_ring.ex[nr].PacketBufferHigh = cpu_to_le64(np->tx_dma[nr]) >> 32;
                  np->tx_ring.ex[nr].PacketBufferLow = cpu_to_le64(np->tx_dma[nr]) & 0x0FFFFFFFF;
                  np->tx_ring.ex[nr].FlagLen = cpu_to_le32((bcnt-1) | tx_flags);
            }
            tx_flags = np->tx_flags;
            offset += bcnt;
            size -= bcnt;
      } while(size);

      /* setup the fragments */
      for (i = 0; i < fragments; i++) {
            skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
            u32 size = frag->size;
            offset = 0;

            do {
                  bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size;
                  nr = (nr + 1) % np->tx_ring_size;

                  np->tx_dma[nr] = pci_map_page(np->pci_dev, frag->page, frag->page_offset+offset, bcnt,
                                          PCI_DMA_TODEVICE);
                  np->tx_dma_len[nr] = bcnt;

                  if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
                        np->tx_ring.orig[nr].PacketBuffer = cpu_to_le32(np->tx_dma[nr]);
                        np->tx_ring.orig[nr].FlagLen = cpu_to_le32((bcnt-1) | tx_flags);
                  } else {
                        np->tx_ring.ex[nr].PacketBufferHigh = cpu_to_le64(np->tx_dma[nr]) >> 32;
                        np->tx_ring.ex[nr].PacketBufferLow = cpu_to_le64(np->tx_dma[nr]) & 0x0FFFFFFFF;
                        np->tx_ring.ex[nr].FlagLen = cpu_to_le32((bcnt-1) | tx_flags);
                  }
                  offset += bcnt;
                  size -= bcnt;
            } while (size);
      }

      /* set last fragment flag  */
      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            np->tx_ring.orig[nr].FlagLen |= cpu_to_le32(tx_flags_extra);
      } else {
            np->tx_ring.ex[nr].FlagLen |= cpu_to_le32(tx_flags_extra);
      }

      np->tx_skbuff[nr] = skb;

#ifdef NETIF_F_TSO
      if (skb_is_gso(skb))
            tx_flags_extra = NV_TX2_TSO | (skb_shinfo(skb)->gso_size << NV_TX2_TSO_SHIFT);
      else
#endif
      tx_flags_extra = (skb->ip_summed == CHECKSUM_HW ? (NV_TX2_CHECKSUM_L3|NV_TX2_CHECKSUM_L4) : 0);

      /* vlan tag */
      if (np->vlangrp && vlan_tx_tag_present(skb)) {
            tx_flags_vlan = NV_TX3_VLAN_TAG_PRESENT | vlan_tx_tag_get(skb);
      }

      /* set tx flags */
      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            np->tx_ring.orig[start_nr].FlagLen |= cpu_to_le32(tx_flags | tx_flags_extra);
      } else {
            np->tx_ring.ex[start_nr].TxVlan = cpu_to_le32(tx_flags_vlan);
            np->tx_ring.ex[start_nr].FlagLen |= cpu_to_le32(tx_flags | tx_flags_extra);
      }

      dprintk(KERN_DEBUG "%s: nv_start_xmit: packet %d (entries %d) queued for transmission. tx_flags_extra: %x\n",
            dev->name, np->next_tx, entries, tx_flags_extra);
      {
            int j;
            for (j=0; j<64; j++) {
                  if ((j%16) == 0)
                        dprintk("\n%03x:", j);
                  dprintk(" %02x", ((unsigned char*)skb->data)[j]);
            }
            dprintk("\n");
      }

      np->next_tx += entries;

      dev->trans_start = jiffies;
      spin_unlock_irq(&np->lock);
      writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
      pci_push(get_hwbase(dev));
      return NETDEV_TX_OK;
}

/*
 * nv_tx_done: check for completed packets, release the skbs.
 *
 * Caller must own np->lock.
 */
static void nv_tx_done(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u32 Flags;
      unsigned int i;
      struct sk_buff *skb;

      while (np->nic_tx != np->next_tx) {
            i = np->nic_tx % np->tx_ring_size;

            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
                  Flags = le32_to_cpu(np->tx_ring.orig[i].FlagLen);
            else
                  Flags = le32_to_cpu(np->tx_ring.ex[i].FlagLen);

            dprintk(KERN_DEBUG "%s: nv_tx_done: looking at packet %d, Flags 0x%x.\n",
                              dev->name, np->nic_tx, Flags);
            if (Flags & NV_TX_VALID)
                  break;
            if (np->desc_ver == DESC_VER_1) {
                  if (Flags & NV_TX_LASTPACKET) {
                        skb = np->tx_skbuff[i];
                        if (Flags & (NV_TX_RETRYERROR|NV_TX_CARRIERLOST|NV_TX_LATECOLLISION|
                                   NV_TX_UNDERFLOW|NV_TX_ERROR)) {
                              if (Flags & NV_TX_UNDERFLOW)
                                    np->stats.tx_fifo_errors++;
                              if (Flags & NV_TX_CARRIERLOST)
                                    np->stats.tx_carrier_errors++;
                              np->stats.tx_errors++;
                        } else {
                              np->stats.tx_packets++;
                              np->stats.tx_bytes += skb->len;
                        }
                  }
            } else {
                  if (Flags & NV_TX2_LASTPACKET) {
                        skb = np->tx_skbuff[i];
                        if (Flags & (NV_TX2_RETRYERROR|NV_TX2_CARRIERLOST|NV_TX2_LATECOLLISION|
                                   NV_TX2_UNDERFLOW|NV_TX2_ERROR)) {
                              if (Flags & NV_TX2_UNDERFLOW)
                                    np->stats.tx_fifo_errors++;
                              if (Flags & NV_TX2_CARRIERLOST)
                                    np->stats.tx_carrier_errors++;
                              np->stats.tx_errors++;
                        } else {
                              np->stats.tx_packets++;
                              np->stats.tx_bytes += skb->len;
                        }
                  }
            }
            nv_release_txskb(dev, i);
            np->nic_tx++;
      }
      if (np->next_tx - np->nic_tx < np->tx_limit_start)
            netif_wake_queue(dev);
}

/*
 * nv_tx_timeout: dev->tx_timeout function
 * Called with netif_tx_lock held.
 */
static void nv_tx_timeout(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 status;

      if (np->msi_flags & NV_MSI_X_ENABLED)
            status = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK;
      else
            status = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;

      printk(KERN_INFO "%s: Got tx_timeout. irq: %08x\n", dev->name, status);

      {
            int i;

            printk(KERN_INFO "%s: Ring at %lx: next %d nic %d\n",
                        dev->name, (unsigned long)np->ring_addr,
                        np->next_tx, np->nic_tx);
            printk(KERN_INFO "%s: Dumping tx registers\n", dev->name);
            for (i=0;i<=np->register_size;i+= 32) {
                  printk(KERN_INFO "%3x: %08x %08x %08x %08x %08x %08x %08x %08x\n",
                              i,
                              readl(base + i + 0), readl(base + i + 4),
                              readl(base + i + 8), readl(base + i + 12),
                              readl(base + i + 16), readl(base + i + 20),
                              readl(base + i + 24), readl(base + i + 28));
            }
            printk(KERN_INFO "%s: Dumping tx ring\n", dev->name);
            for (i=0;i<np->tx_ring_size;i+= 4) {
                  if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
                        printk(KERN_INFO "%03x: %08x %08x // %08x %08x // %08x %08x // %08x %08x\n",
                               i,
                               le32_to_cpu(np->tx_ring.orig[i].PacketBuffer),
                               le32_to_cpu(np->tx_ring.orig[i].FlagLen),
                               le32_to_cpu(np->tx_ring.orig[i+1].PacketBuffer),
                               le32_to_cpu(np->tx_ring.orig[i+1].FlagLen),
                               le32_to_cpu(np->tx_ring.orig[i+2].PacketBuffer),
                               le32_to_cpu(np->tx_ring.orig[i+2].FlagLen),
                               le32_to_cpu(np->tx_ring.orig[i+3].PacketBuffer),
                               le32_to_cpu(np->tx_ring.orig[i+3].FlagLen));
                  } else {
                        printk(KERN_INFO "%03x: %08x %08x %08x // %08x %08x %08x // %08x %08x %08x // %08x %08x %08x\n",
                               i,
                               le32_to_cpu(np->tx_ring.ex[i].PacketBufferHigh),
                               le32_to_cpu(np->tx_ring.ex[i].PacketBufferLow),
                               le32_to_cpu(np->tx_ring.ex[i].FlagLen),
                               le32_to_cpu(np->tx_ring.ex[i+1].PacketBufferHigh),
                               le32_to_cpu(np->tx_ring.ex[i+1].PacketBufferLow),
                               le32_to_cpu(np->tx_ring.ex[i+1].FlagLen),
                               le32_to_cpu(np->tx_ring.ex[i+2].PacketBufferHigh),
                               le32_to_cpu(np->tx_ring.ex[i+2].PacketBufferLow),
                               le32_to_cpu(np->tx_ring.ex[i+2].FlagLen),
                               le32_to_cpu(np->tx_ring.ex[i+3].PacketBufferHigh),
                               le32_to_cpu(np->tx_ring.ex[i+3].PacketBufferLow),
                               le32_to_cpu(np->tx_ring.ex[i+3].FlagLen));
                  }
            }
      }

      spin_lock_irq(&np->lock);

      /* 1) stop tx engine */
      nv_stop_tx(dev);

      /* 2) check that the packets were not sent already: */
      nv_tx_done(dev);

      /* 3) if there are dead entries: clear everything */
      if (np->next_tx != np->nic_tx) {
            printk(KERN_DEBUG "%s: tx_timeout: dead entries!\n", dev->name);
            nv_drain_tx(dev);
            np->next_tx = np->nic_tx = 0;
            setup_hw_rings(dev, NV_SETUP_TX_RING);
            netif_wake_queue(dev);
      }

      /* 4) restart tx engine */
      nv_start_tx(dev);
      spin_unlock_irq(&np->lock);
}

/*
 * Called when the nic notices a mismatch between the actual data len on the
 * wire and the len indicated in the 802 header
 */
static int nv_getlen(struct net_device *dev, void *packet, int datalen)
{
      int hdrlen; /* length of the 802 header */
      int protolen;     /* length as stored in the proto field */

      /* 1) calculate len according to header */
      if ( ((struct vlan_ethhdr *)packet)->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
            protolen = ntohs( ((struct vlan_ethhdr *)packet)->h_vlan_encapsulated_proto );
            hdrlen = VLAN_HLEN;
      } else {
            protolen = ntohs( ((struct ethhdr *)packet)->h_proto);
            hdrlen = ETH_HLEN;
      }
      dprintk(KERN_DEBUG "%s: nv_getlen: datalen %d, protolen %d, hdrlen %d\n",
                        dev->name, datalen, protolen, hdrlen);
      if (protolen > ETH_DATA_LEN)
            return datalen; /* Value in proto field not a len, no checks possible */

      protolen += hdrlen;
      /* consistency checks: */
      if (datalen > ETH_ZLEN) {
            if (datalen >= protolen) {
                  /* more data on wire than in 802 header, trim of
                   * additional data.
                   */
                  dprintk(KERN_DEBUG "%s: nv_getlen: accepting %d bytes.\n",
                              dev->name, protolen);
                  return protolen;
            } else {
                  /* less data on wire than mentioned in header.
                   * Discard the packet.
                   */
                  dprintk(KERN_DEBUG "%s: nv_getlen: discarding long packet.\n",
                              dev->name);
                  return -1;
            }
      } else {
            /* short packet. Accept only if 802 values are also short */
            if (protolen > ETH_ZLEN) {
                  dprintk(KERN_DEBUG "%s: nv_getlen: discarding short packet.\n",
                              dev->name);
                  return -1;
            }
            dprintk(KERN_DEBUG "%s: nv_getlen: accepting %d bytes.\n",
                        dev->name, datalen);
            return datalen;
      }
}

static void nv_rx_process(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u32 Flags;
      u32 vlanflags = 0;

      for (;;) {
            struct sk_buff *skb;
            int len;
            int i;
            if (np->cur_rx - np->refill_rx >= np->rx_ring_size)
                  break;      /* we scanned the whole ring - do not continue */

            i = np->cur_rx % np->rx_ring_size;
            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
                  Flags = le32_to_cpu(np->rx_ring.orig[i].FlagLen);
                  len = nv_descr_getlength(&np->rx_ring.orig[i], np->desc_ver);
            } else {
                  Flags = le32_to_cpu(np->rx_ring.ex[i].FlagLen);
                  len = nv_descr_getlength_ex(&np->rx_ring.ex[i], np->desc_ver);
                  vlanflags = le32_to_cpu(np->rx_ring.ex[i].PacketBufferLow);
            }

            dprintk(KERN_DEBUG "%s: nv_rx_process: looking at packet %d, Flags 0x%x.\n",
                              dev->name, np->cur_rx, Flags);

            if (Flags & NV_RX_AVAIL)
                  break;      /* still owned by hardware, */

            /*
             * the packet is for us - immediately tear down the pci mapping.
             * TODO: check if a prefetch of the first cacheline improves
             * the performance.
             */
            pci_unmap_single(np->pci_dev, np->rx_dma[i],
                        np->rx_skbuff[i]->end-np->rx_skbuff[i]->data,
                        PCI_DMA_FROMDEVICE);

            {
                  int j;
                  dprintk(KERN_DEBUG "Dumping packet (flags 0x%x).",Flags);
                  for (j=0; j<64; j++) {
                        if ((j%16) == 0)
                              dprintk("\n%03x:", j);
                        dprintk(" %02x", ((unsigned char*)np->rx_skbuff[i]->data)[j]);
                  }
                  dprintk("\n");
            }
            /* look at what we actually got: */
            if (np->desc_ver == DESC_VER_1) {
                  if (!(Flags & NV_RX_DESCRIPTORVALID))
                        goto next_pkt;

                  if (Flags & NV_RX_ERROR) {
                        if (Flags & NV_RX_MISSEDFRAME) {
                              np->stats.rx_missed_errors++;
                              np->stats.rx_errors++;
                              goto next_pkt;
                        }
                        if (Flags & (NV_RX_ERROR1|NV_RX_ERROR2|NV_RX_ERROR3)) {
                              np->stats.rx_errors++;
                              goto next_pkt;
                        }
                        if (Flags & NV_RX_CRCERR) {
                              np->stats.rx_crc_errors++;
                              np->stats.rx_errors++;
                              goto next_pkt;
                        }
                        if (Flags & NV_RX_OVERFLOW) {
                              np->stats.rx_over_errors++;
                              np->stats.rx_errors++;
                              goto next_pkt;
                        }
                        if (Flags & NV_RX_ERROR4) {
                              len = nv_getlen(dev, np->rx_skbuff[i]->data, len);
                              if (len < 0) {
                                    np->stats.rx_errors++;
                                    goto next_pkt;
                              }
                        }
                        /* framing errors are soft errors. */
                        if (Flags & NV_RX_FRAMINGERR) {
                              if (Flags & NV_RX_SUBSTRACT1) {
                                    len--;
                              }
                        }
                  }
            } else {
                  if (!(Flags & NV_RX2_DESCRIPTORVALID))
                        goto next_pkt;

                  if (Flags & NV_RX2_ERROR) {
                        if (Flags & (NV_RX2_ERROR1|NV_RX2_ERROR2|NV_RX2_ERROR3)) {
                              np->stats.rx_errors++;
                              goto next_pkt;
                        }
                        if (Flags & NV_RX2_CRCERR) {
                              np->stats.rx_crc_errors++;
                              np->stats.rx_errors++;
                              goto next_pkt;
                        }
                        if (Flags & NV_RX2_OVERFLOW) {
                              np->stats.rx_over_errors++;
                              np->stats.rx_errors++;
                              goto next_pkt;
                        }
                        if (Flags & NV_RX2_ERROR4) {
                              len = nv_getlen(dev, np->rx_skbuff[i]->data, len);
                              if (len < 0) {
                                    np->stats.rx_errors++;
                                    goto next_pkt;
                              }
                        }
                        /* framing errors are soft errors */
                        if (Flags & NV_RX2_FRAMINGERR) {
                              if (Flags & NV_RX2_SUBSTRACT1) {
                                    len--;
                              }
                        }
                  }
                  if (np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) {
                        Flags &= NV_RX2_CHECKSUMMASK;
                        if (Flags == NV_RX2_CHECKSUMOK1 ||
                            Flags == NV_RX2_CHECKSUMOK2 ||
                            Flags == NV_RX2_CHECKSUMOK3) {
                              dprintk(KERN_DEBUG "%s: hw checksum hit!.\n", dev->name);
                              np->rx_skbuff[i]->ip_summed = CHECKSUM_UNNECESSARY;
                        } else {
                              dprintk(KERN_DEBUG "%s: hwchecksum miss!.\n", dev->name);
                        }
                  }
            }
            /* got a valid packet - forward it to the network core */
            skb = np->rx_skbuff[i];
            np->rx_skbuff[i] = NULL;

            skb_put(skb, len);
            skb->protocol = eth_type_trans(skb, dev);
            dprintk(KERN_DEBUG "%s: nv_rx_process: packet %d with %d bytes, proto %d accepted.\n",
                              dev->name, np->cur_rx, len, skb->protocol);
            if (np->vlangrp && (vlanflags & NV_RX3_VLAN_TAG_PRESENT)) {
                  vlan_hwaccel_rx(skb, np->vlangrp, vlanflags & NV_RX3_VLAN_TAG_MASK);
            } else {
                  netif_rx(skb);
            }
            dev->last_rx = jiffies;
            np->stats.rx_packets++;
            np->stats.rx_bytes += len;
next_pkt:
            np->cur_rx++;
      }
}

static void set_bufsize(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);

      if (dev->mtu <= ETH_DATA_LEN)
            np->rx_buf_sz = ETH_DATA_LEN + NV_RX_HEADERS;
      else
            np->rx_buf_sz = dev->mtu + NV_RX_HEADERS;
}

/*
 * nv_change_mtu: dev->change_mtu function
 * Called with dev_base_lock held for read.
 */
static int nv_change_mtu(struct net_device *dev, int new_mtu)
{
      struct fe_priv *np = netdev_priv(dev);
      int old_mtu;

      if (new_mtu < 64 || new_mtu > np->pkt_limit)
            return -EINVAL;

      old_mtu = dev->mtu;
      dev->mtu = new_mtu;

      /* return early if the buffer sizes will not change */
      if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN)
            return 0;
      if (old_mtu == new_mtu)
            return 0;

      /* synchronized against open : rtnl_lock() held by caller */
      if (netif_running(dev)) {
            u8 __iomem *base = get_hwbase(dev);
            /*
             * It seems that the nic preloads valid ring entries into an
             * internal buffer. The procedure for flushing everything is
             * guessed, there is probably a simpler approach.
             * Changing the MTU is a rare event, it shouldn't matter.
             */
            nv_disable_irq(dev);
            netif_tx_lock_bh(dev);
            spin_lock(&np->lock);
            /* stop engines */
            nv_stop_rx(dev);
            nv_stop_tx(dev);
            nv_txrx_reset(dev);
            /* drain rx queue */
            nv_drain_rx(dev);
            nv_drain_tx(dev);
            /* reinit driver view of the rx queue */
            set_bufsize(dev);
            if (nv_init_ring(dev)) {
                  if (!np->in_shutdown)
                        mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
            }
            /* reinit nic view of the rx queue */
            writel(np->rx_buf_sz, base + NvRegOffloadConfig);
            setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
            writel( ((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
                  base + NvRegRingSizes);
            pci_push(base);
            writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
            pci_push(base);

            /* restart rx engine */
            nv_start_rx(dev);
            nv_start_tx(dev);
            spin_unlock(&np->lock);
            netif_tx_unlock_bh(dev);
            nv_enable_irq(dev);
      }
      return 0;
}

static void nv_copy_mac_to_hw(struct net_device *dev)
{
      u8 __iomem *base = get_hwbase(dev);
      u32 mac[2];

      mac[0] = (dev->dev_addr[0] << 0) + (dev->dev_addr[1] << 8) +
                  (dev->dev_addr[2] << 16) + (dev->dev_addr[3] << 24);
      mac[1] = (dev->dev_addr[4] << 0) + (dev->dev_addr[5] << 8);

      writel(mac[0], base + NvRegMacAddrA);
      writel(mac[1], base + NvRegMacAddrB);
}

/*
 * nv_set_mac_address: dev->set_mac_address function
 * Called with rtnl_lock() held.
 */
static int nv_set_mac_address(struct net_device *dev, void *addr)
{
      struct fe_priv *np = netdev_priv(dev);
      struct sockaddr *macaddr = (struct sockaddr*)addr;

      if(!is_valid_ether_addr(macaddr->sa_data))
            return -EADDRNOTAVAIL;

      /* synchronized against open : rtnl_lock() held by caller */
      memcpy(dev->dev_addr, macaddr->sa_data, ETH_ALEN);

      if (netif_running(dev)) {
            netif_tx_lock_bh(dev);
            spin_lock_irq(&np->lock);

            /* stop rx engine */
            nv_stop_rx(dev);

            /* set mac address */
            nv_copy_mac_to_hw(dev);

            /* restart rx engine */
            nv_start_rx(dev);
            spin_unlock_irq(&np->lock);
            netif_tx_unlock_bh(dev);
      } else {
            nv_copy_mac_to_hw(dev);
      }
      return 0;
}

/*
 * nv_set_multicast: dev->set_multicast function
 * Called with netif_tx_lock held.
 */
static void nv_set_multicast(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 addr[2];
      u32 mask[2];
      u32 pff = readl(base + NvRegPacketFilterFlags) & NVREG_PFF_PAUSE_RX;

      memset(addr, 0, sizeof(addr));
      memset(mask, 0, sizeof(mask));

      if (dev->flags & IFF_PROMISC) {
            printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
            pff |= NVREG_PFF_PROMISC;
      } else {
            pff |= NVREG_PFF_MYADDR;

            if (dev->flags & IFF_ALLMULTI || dev->mc_list) {
                  u32 alwaysOff[2];
                  u32 alwaysOn[2];

                  alwaysOn[0] = alwaysOn[1] = alwaysOff[0] = alwaysOff[1] = 0xffffffff;
                  if (dev->flags & IFF_ALLMULTI) {
                        alwaysOn[0] = alwaysOn[1] = alwaysOff[0] = alwaysOff[1] = 0;
                  } else {
                        struct dev_mc_list *walk;

                        walk = dev->mc_list;
                        while (walk != NULL) {
                              u32 a, b;
                              a = le32_to_cpu(*(u32 *) walk->dmi_addr);
                              b = le16_to_cpu(*(u16 *) (&walk->dmi_addr[4]));
                              alwaysOn[0] &= a;
                              alwaysOff[0] &= ~a;
                              alwaysOn[1] &= b;
                              alwaysOff[1] &= ~b;
                              walk = walk->next;
                        }
                  }
                  addr[0] = alwaysOn[0];
                  addr[1] = alwaysOn[1];
                  mask[0] = alwaysOn[0] | alwaysOff[0];
                  mask[1] = alwaysOn[1] | alwaysOff[1];
            }
      }
      addr[0] |= NVREG_MCASTADDRA_FORCE;
      pff |= NVREG_PFF_ALWAYS;
      spin_lock_irq(&np->lock);
      nv_stop_rx(dev);
      writel(addr[0], base + NvRegMulticastAddrA);
      writel(addr[1], base + NvRegMulticastAddrB);
      writel(mask[0], base + NvRegMulticastMaskA);
      writel(mask[1], base + NvRegMulticastMaskB);
      writel(pff, base + NvRegPacketFilterFlags);
      dprintk(KERN_INFO "%s: reconfiguration for multicast lists.\n",
            dev->name);
      nv_start_rx(dev);
      spin_unlock_irq(&np->lock);
}

static void nv_update_pause(struct net_device *dev, u32 pause_flags)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);

      np->pause_flags &= ~(NV_PAUSEFRAME_TX_ENABLE | NV_PAUSEFRAME_RX_ENABLE);

      if (np->pause_flags & NV_PAUSEFRAME_RX_CAPABLE) {
            u32 pff = readl(base + NvRegPacketFilterFlags) & ~NVREG_PFF_PAUSE_RX;
            if (pause_flags & NV_PAUSEFRAME_RX_ENABLE) {
                  writel(pff|NVREG_PFF_PAUSE_RX, base + NvRegPacketFilterFlags);
                  np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
            } else {
                  writel(pff, base + NvRegPacketFilterFlags);
            }
      }
      if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE) {
            u32 regmisc = readl(base + NvRegMisc1) & ~NVREG_MISC1_PAUSE_TX;
            if (pause_flags & NV_PAUSEFRAME_TX_ENABLE) {
                  writel(NVREG_TX_PAUSEFRAME_ENABLE,  base + NvRegTxPauseFrame);
                  writel(regmisc|NVREG_MISC1_PAUSE_TX, base + NvRegMisc1);
                  np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
            } else {
                  writel(NVREG_TX_PAUSEFRAME_DISABLE,  base + NvRegTxPauseFrame);
                  writel(regmisc, base + NvRegMisc1);
            }
      }
}

/**
 * nv_update_linkspeed: Setup the MAC according to the link partner
 * @dev: Network device to be configured
 *
 * The function queries the PHY and checks if there is a link partner.
 * If yes, then it sets up the MAC accordingly. Otherwise, the MAC is
 * set to 10 MBit HD.
 *
 * The function returns 0 if there is no link partner and 1 if there is
 * a good link partner.
 */
static int nv_update_linkspeed(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      int adv = 0;
      int lpa = 0;
      int adv_lpa, adv_pause, lpa_pause;
      int newls = np->linkspeed;
      int newdup = np->duplex;
      int mii_status;
      int retval = 0;
      u32 control_1000, status_1000, phyreg, pause_flags, txreg;

      /* BMSR_LSTATUS is latched, read it twice:
       * we want the current value.
       */
      mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
      mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);

      if (!(mii_status & BMSR_LSTATUS)) {
            dprintk(KERN_DEBUG "%s: no link detected by phy - falling back to 10HD.\n",
                        dev->name);
            newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
            newdup = 0;
            retval = 0;
            goto set_speed;
      }

      if (np->autoneg == 0) {
            dprintk(KERN_DEBUG "%s: nv_update_linkspeed: autoneg off, PHY set to 0x%04x.\n",
                        dev->name, np->fixed_mode);
            if (np->fixed_mode & LPA_100FULL) {
                  newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
                  newdup = 1;
            } else if (np->fixed_mode & LPA_100HALF) {
                  newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
                  newdup = 0;
            } else if (np->fixed_mode & LPA_10FULL) {
                  newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
                  newdup = 1;
            } else {
                  newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
                  newdup = 0;
            }
            retval = 1;
            goto set_speed;
      }
      /* check auto negotiation is complete */
      if (!(mii_status & BMSR_ANEGCOMPLETE)) {
            /* still in autonegotiation - configure nic for 10 MBit HD and wait. */
            newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
            newdup = 0;
            retval = 0;
            dprintk(KERN_DEBUG "%s: autoneg not completed - falling back to 10HD.\n", dev->name);
            goto set_speed;
      }

      adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
      lpa = mii_rw(dev, np->phyaddr, MII_LPA, MII_READ);
      dprintk(KERN_DEBUG "%s: nv_update_linkspeed: PHY advertises 0x%04x, lpa 0x%04x.\n",
                        dev->name, adv, lpa);

      retval = 1;
      if (np->gigabit == PHY_GIGABIT) {
            control_1000 = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
            status_1000 = mii_rw(dev, np->phyaddr, MII_STAT1000, MII_READ);

            if ((control_1000 & ADVERTISE_1000FULL) &&
                  (status_1000 & LPA_1000FULL)) {
                  dprintk(KERN_DEBUG "%s: nv_update_linkspeed: GBit ethernet detected.\n",
                        dev->name);
                  newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_1000;
                  newdup = 1;
                  goto set_speed;
            }
      }

      /* FIXME: handle parallel detection properly */
      adv_lpa = lpa & adv;
      if (adv_lpa & LPA_100FULL) {
            newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
            newdup = 1;
      } else if (adv_lpa & LPA_100HALF) {
            newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
            newdup = 0;
      } else if (adv_lpa & LPA_10FULL) {
            newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
            newdup = 1;
      } else if (adv_lpa & LPA_10HALF) {
            newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
            newdup = 0;
      } else {
            dprintk(KERN_DEBUG "%s: bad ability %04x - falling back to 10HD.\n", dev->name, adv_lpa);
            newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
            newdup = 0;
      }

set_speed:
      if (np->duplex == newdup && np->linkspeed == newls)
            return retval;

      dprintk(KERN_INFO "%s: changing link setting from %d/%d to %d/%d.\n",
                  dev->name, np->linkspeed, np->duplex, newls, newdup);

      np->duplex = newdup;
      np->linkspeed = newls;

      if (np->gigabit == PHY_GIGABIT) {
            phyreg = readl(base + NvRegRandomSeed);
            phyreg &= ~(0x3FF00);
            if ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_10)
                  phyreg |= NVREG_RNDSEED_FORCE3;
            else if ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_100)
                  phyreg |= NVREG_RNDSEED_FORCE2;
            else if ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_1000)
                  phyreg |= NVREG_RNDSEED_FORCE;
            writel(phyreg, base + NvRegRandomSeed);
      }

      phyreg = readl(base + NvRegPhyInterface);
      phyreg &= ~(PHY_HALF|PHY_100|PHY_1000);
      if (np->duplex == 0)
            phyreg |= PHY_HALF;
      if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_100)
            phyreg |= PHY_100;
      else if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_1000)
            phyreg |= PHY_1000;
      writel(phyreg, base + NvRegPhyInterface);

      if (phyreg & PHY_RGMII) {
            if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_1000)
                  txreg = NVREG_TX_DEFERRAL_RGMII_1000;
            else
                  txreg = NVREG_TX_DEFERRAL_RGMII_10_100;
      } else {
            txreg = NVREG_TX_DEFERRAL_DEFAULT;
      }
      writel(txreg, base + NvRegTxDeferral);

      if (np->desc_ver == DESC_VER_1) {
            txreg = NVREG_TX_WM_DESC1_DEFAULT;
      } else {
            if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_1000)
                  txreg = NVREG_TX_WM_DESC2_3_1000;
            else
                  txreg = NVREG_TX_WM_DESC2_3_DEFAULT;
      }
      writel(txreg, base + NvRegTxWatermark);

      writel(NVREG_MISC1_FORCE | ( np->duplex ? 0 : NVREG_MISC1_HD),
            base + NvRegMisc1);
      pci_push(base);
      writel(np->linkspeed, base + NvRegLinkSpeed);
      pci_push(base);

      pause_flags = 0;
      /* setup pause frame */
      if (np->duplex != 0) {
            if (np->autoneg && np->pause_flags & NV_PAUSEFRAME_AUTONEG) {
                  adv_pause = adv & (ADVERTISE_PAUSE_CAP| ADVERTISE_PAUSE_ASYM);
                  lpa_pause = lpa & (LPA_PAUSE_CAP| LPA_PAUSE_ASYM);

                  switch (adv_pause) {
                  case (ADVERTISE_PAUSE_CAP):
                        if (lpa_pause & LPA_PAUSE_CAP) {
                              pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
                              if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
                                    pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
                        }
                        break;
                  case (ADVERTISE_PAUSE_ASYM):
                        if (lpa_pause == (LPA_PAUSE_CAP| LPA_PAUSE_ASYM))
                        {
                              pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
                        }
                        break;
                  case (ADVERTISE_PAUSE_CAP| ADVERTISE_PAUSE_ASYM):
                        if (lpa_pause & LPA_PAUSE_CAP)
                        {
                              pause_flags |=  NV_PAUSEFRAME_RX_ENABLE;
                              if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
                                    pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
                        }
                        if (lpa_pause == LPA_PAUSE_ASYM)
                        {
                              pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
                        }
                        break;
                  }
            } else {
                  pause_flags = np->pause_flags;
            }
      }
      nv_update_pause(dev, pause_flags);

      return retval;
}

static void nv_linkchange(struct net_device *dev)
{
      if (nv_update_linkspeed(dev)) {
            if (!netif_carrier_ok(dev)) {
                  netif_carrier_on(dev);
                  printk(KERN_INFO "%s: link up.\n", dev->name);
                  nv_start_rx(dev);
            }
      } else {
            if (netif_carrier_ok(dev)) {
                  netif_carrier_off(dev);
                  printk(KERN_INFO "%s: link down.\n", dev->name);
                  nv_stop_rx(dev);
            }
      }
}

static void nv_link_irq(struct net_device *dev)
{
      u8 __iomem *base = get_hwbase(dev);
      u32 miistat;

      miistat = readl(base + NvRegMIIStatus);
      writel(NVREG_MIISTAT_MASK, base + NvRegMIIStatus);
      dprintk(KERN_INFO "%s: link change irq, status 0x%x.\n", dev->name, miistat);

      if (miistat & (NVREG_MIISTAT_LINKCHANGE))
            nv_linkchange(dev);
      dprintk(KERN_DEBUG "%s: link change notification done.\n", dev->name);
}

static irqreturn_t nv_nic_irq(int foo, void *data, struct pt_regs *regs)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 events;
      int i;

      dprintk(KERN_DEBUG "%s: nv_nic_irq\n", dev->name);

      for (i=0; ; i++) {
            if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
                  events = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
                  writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
            } else {
                  events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK;
                  writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);
            }
            pci_push(base);
            dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, events);
            if (!(events & np->irqmask))
                  break;

            spin_lock(&np->lock);
            nv_tx_done(dev);
            spin_unlock(&np->lock);

            nv_rx_process(dev);
            if (nv_alloc_rx(dev)) {
                  spin_lock(&np->lock);
                  if (!np->in_shutdown)
                        mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
                  spin_unlock(&np->lock);
            }

            if (events & NVREG_IRQ_LINK) {
                  spin_lock(&np->lock);
                  nv_link_irq(dev);
                  spin_unlock(&np->lock);
            }
            if (np->need_linktimer && time_after(jiffies, np->link_timeout)) {
                  spin_lock(&np->lock);
                  nv_linkchange(dev);
                  spin_unlock(&np->lock);
                  np->link_timeout = jiffies + LINK_TIMEOUT;
            }
            if (events & (NVREG_IRQ_TX_ERR)) {
                  dprintk(KERN_DEBUG "%s: received irq with events 0x%x. Probably TX fail.\n",
                                    dev->name, events);
            }
            if (events & (NVREG_IRQ_UNKNOWN)) {
                  printk(KERN_DEBUG "%s: received irq with unknown events 0x%x. Please report\n",
                                    dev->name, events);
            }
            if (i > max_interrupt_work) {
                  spin_lock(&np->lock);
                  /* disable interrupts on the nic */
                  if (!(np->msi_flags & NV_MSI_X_ENABLED))
                        writel(0, base + NvRegIrqMask);
                  else
                        writel(np->irqmask, base + NvRegIrqMask);
                  pci_push(base);

                  if (!np->in_shutdown) {
                        np->nic_poll_irq = np->irqmask;
                        mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
                  }
                  printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i);
                  spin_unlock(&np->lock);
                  break;
            }

      }
      dprintk(KERN_DEBUG "%s: nv_nic_irq completed\n", dev->name);

      return IRQ_RETVAL(i);
}

static irqreturn_t nv_nic_irq_tx(int foo, void *data, struct pt_regs *regs)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 events;
      int i;

      dprintk(KERN_DEBUG "%s: nv_nic_irq_tx\n", dev->name);

      for (i=0; ; i++) {
            events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQ_TX_ALL;
            writel(NVREG_IRQ_TX_ALL, base + NvRegMSIXIrqStatus);
            pci_push(base);
            dprintk(KERN_DEBUG "%s: tx irq: %08x\n", dev->name, events);
            if (!(events & np->irqmask))
                  break;

            spin_lock_irq(&np->lock);
            nv_tx_done(dev);
            spin_unlock_irq(&np->lock);

            if (events & (NVREG_IRQ_TX_ERR)) {
                  dprintk(KERN_DEBUG "%s: received irq with events 0x%x. Probably TX fail.\n",
                                    dev->name, events);
            }
            if (i > max_interrupt_work) {
                  spin_lock_irq(&np->lock);
                  /* disable interrupts on the nic */
                  writel(NVREG_IRQ_TX_ALL, base + NvRegIrqMask);
                  pci_push(base);

                  if (!np->in_shutdown) {
                        np->nic_poll_irq |= NVREG_IRQ_TX_ALL;
                        mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
                  }
                  printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_tx.\n", dev->name, i);
                  spin_unlock_irq(&np->lock);
                  break;
            }

      }
      dprintk(KERN_DEBUG "%s: nv_nic_irq_tx completed\n", dev->name);

      return IRQ_RETVAL(i);
}

static irqreturn_t nv_nic_irq_rx(int foo, void *data, struct pt_regs *regs)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 events;
      int i;

      dprintk(KERN_DEBUG "%s: nv_nic_irq_rx\n", dev->name);

      for (i=0; ; i++) {
            events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQ_RX_ALL;
            writel(NVREG_IRQ_RX_ALL, base + NvRegMSIXIrqStatus);
            pci_push(base);
            dprintk(KERN_DEBUG "%s: rx irq: %08x\n", dev->name, events);
            if (!(events & np->irqmask))
                  break;

            nv_rx_process(dev);
            if (nv_alloc_rx(dev)) {
                  spin_lock_irq(&np->lock);
                  if (!np->in_shutdown)
                        mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
                  spin_unlock_irq(&np->lock);
            }

            if (i > max_interrupt_work) {
                  spin_lock_irq(&np->lock);
                  /* disable interrupts on the nic */
                  writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
                  pci_push(base);

                  if (!np->in_shutdown) {
                        np->nic_poll_irq |= NVREG_IRQ_RX_ALL;
                        mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
                  }
                  printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_rx.\n", dev->name, i);
                  spin_unlock_irq(&np->lock);
                  break;
            }

      }
      dprintk(KERN_DEBUG "%s: nv_nic_irq_rx completed\n", dev->name);

      return IRQ_RETVAL(i);
}

static irqreturn_t nv_nic_irq_other(int foo, void *data, struct pt_regs *regs)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 events;
      int i;

      dprintk(KERN_DEBUG "%s: nv_nic_irq_other\n", dev->name);

      for (i=0; ; i++) {
            events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQ_OTHER;
            writel(NVREG_IRQ_OTHER, base + NvRegMSIXIrqStatus);
            pci_push(base);
            dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, events);
            if (!(events & np->irqmask))
                  break;

            if (events & NVREG_IRQ_LINK) {
                  spin_lock_irq(&np->lock);
                  nv_link_irq(dev);
                  spin_unlock_irq(&np->lock);
            }
            if (np->need_linktimer && time_after(jiffies, np->link_timeout)) {
                  spin_lock_irq(&np->lock);
                  nv_linkchange(dev);
                  spin_unlock_irq(&np->lock);
                  np->link_timeout = jiffies + LINK_TIMEOUT;
            }
            if (events & (NVREG_IRQ_UNKNOWN)) {
                  printk(KERN_DEBUG "%s: received irq with unknown events 0x%x. Please report\n",
                                    dev->name, events);
            }
            if (i > max_interrupt_work) {
                  spin_lock_irq(&np->lock);
                  /* disable interrupts on the nic */
                  writel(NVREG_IRQ_OTHER, base + NvRegIrqMask);
                  pci_push(base);

                  if (!np->in_shutdown) {
                        np->nic_poll_irq |= NVREG_IRQ_OTHER;
                        mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
                  }
                  printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_other.\n", dev->name, i);
                  spin_unlock_irq(&np->lock);
                  break;
            }

      }
      dprintk(KERN_DEBUG "%s: nv_nic_irq_other completed\n", dev->name);

      return IRQ_RETVAL(i);
}

static irqreturn_t nv_nic_irq_test(int foo, void *data, struct pt_regs *regs)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 events;

      dprintk(KERN_DEBUG "%s: nv_nic_irq_test\n", dev->name);

      if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
            events = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
            writel(NVREG_IRQ_TIMER, base + NvRegIrqStatus);
      } else {
            events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK;
            writel(NVREG_IRQ_TIMER, base + NvRegMSIXIrqStatus);
      }
      pci_push(base);
      dprintk(KERN_DEBUG "%s: irq: %08x\n", dev->name, events);
      if (!(events & NVREG_IRQ_TIMER))
            return IRQ_RETVAL(0);

      spin_lock(&np->lock);
      np->intr_test = 1;
      spin_unlock(&np->lock);

      dprintk(KERN_DEBUG "%s: nv_nic_irq_test completed\n", dev->name);

      return IRQ_RETVAL(1);
}

static void set_msix_vector_map(struct net_device *dev, u32 vector, u32 irqmask)
{
      u8 __iomem *base = get_hwbase(dev);
      int i;
      u32 msixmap = 0;

      /* Each interrupt bit can be mapped to a MSIX vector (4 bits).
       * MSIXMap0 represents the first 8 interrupts and MSIXMap1 represents
       * the remaining 8 interrupts.
       */
      for (i = 0; i < 8; i++) {
            if ((irqmask >> i) & 0x1) {
                  msixmap |= vector << (i << 2);
            }
      }
      writel(readl(base + NvRegMSIXMap0) | msixmap, base + NvRegMSIXMap0);

      msixmap = 0;
      for (i = 0; i < 8; i++) {
            if ((irqmask >> (i + 8)) & 0x1) {
                  msixmap |= vector << (i << 2);
            }
      }
      writel(readl(base + NvRegMSIXMap1) | msixmap, base + NvRegMSIXMap1);
}

static int nv_request_irq(struct net_device *dev, int intr_test)
{
      struct fe_priv *np = get_nvpriv(dev);
      u8 __iomem *base = get_hwbase(dev);
      int ret = 1;
      int i;

      if (np->msi_flags & NV_MSI_X_CAPABLE) {
            for (i = 0; i < (np->msi_flags & NV_MSI_X_VECTORS_MASK); i++) {
                  np->msi_x_entry[i].entry = i;
            }
            if ((ret = pci_enable_msix(np->pci_dev, np->msi_x_entry, (np->msi_flags & NV_MSI_X_VECTORS_MASK))) == 0) {
                  np->msi_flags |= NV_MSI_X_ENABLED;
                  if (optimization_mode == NV_OPTIMIZATION_MODE_THROUGHPUT && !intr_test) {
                        /* Request irq for rx handling */
                        if (request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector, &nv_nic_irq_rx, IRQF_SHARED, dev->name, dev) != 0) {
                              printk(KERN_INFO "forcedeth: request_irq failed for rx %d\n", ret);
                              pci_disable_msix(np->pci_dev);
                              np->msi_flags &= ~NV_MSI_X_ENABLED;
                              goto out_err;
                        }
                        /* Request irq for tx handling */
                        if (request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector, &nv_nic_irq_tx, IRQF_SHARED, dev->name, dev) != 0) {
                              printk(KERN_INFO "forcedeth: request_irq failed for tx %d\n", ret);
                              pci_disable_msix(np->pci_dev);
                              np->msi_flags &= ~NV_MSI_X_ENABLED;
                              goto out_free_rx;
                        }
                        /* Request irq for link and timer handling */
                        if (request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector, &nv_nic_irq_other, IRQF_SHARED, dev->name, dev) != 0) {
                              printk(KERN_INFO "forcedeth: request_irq failed for link %d\n", ret);
                              pci_disable_msix(np->pci_dev);
                              np->msi_flags &= ~NV_MSI_X_ENABLED;
                              goto out_free_tx;
                        }
                        /* map interrupts to their respective vector */
                        writel(0, base + NvRegMSIXMap0);
                        writel(0, base + NvRegMSIXMap1);
                        set_msix_vector_map(dev, NV_MSI_X_VECTOR_RX, NVREG_IRQ_RX_ALL);
                        set_msix_vector_map(dev, NV_MSI_X_VECTOR_TX, NVREG_IRQ_TX_ALL);
                        set_msix_vector_map(dev, NV_MSI_X_VECTOR_OTHER, NVREG_IRQ_OTHER);
                  } else {
                        /* Request irq for all interrupts */
                        if ((!intr_test &&
                             request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector, &nv_nic_irq, IRQF_SHARED, dev->name, dev) != 0) ||
                            (intr_test &&
                             request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector, &nv_nic_irq_test, IRQF_SHARED, dev->name, dev) != 0)) {
                              printk(KERN_INFO "forcedeth: request_irq failed %d\n", ret);
                              pci_disable_msix(np->pci_dev);
                              np->msi_flags &= ~NV_MSI_X_ENABLED;
                              goto out_err;
                        }

                        /* map interrupts to vector 0 */
                        writel(0, base + NvRegMSIXMap0);
                        writel(0, base + NvRegMSIXMap1);
                  }
            }
      }
      if (ret != 0 && np->msi_flags & NV_MSI_CAPABLE) {
            if ((ret = pci_enable_msi(np->pci_dev)) == 0) {
                  np->msi_flags |= NV_MSI_ENABLED;
                  if ((!intr_test && request_irq(np->pci_dev->irq, &nv_nic_irq, IRQF_SHARED, dev->name, dev) != 0) ||
                      (intr_test && request_irq(np->pci_dev->irq, &nv_nic_irq_test, IRQF_SHARED, dev->name, dev) != 0)) {
                        printk(KERN_INFO "forcedeth: request_irq failed %d\n", ret);
                        pci_disable_msi(np->pci_dev);
                        np->msi_flags &= ~NV_MSI_ENABLED;
                        goto out_err;
                  }

                  /* map interrupts to vector 0 */
                  writel(0, base + NvRegMSIMap0);
                  writel(0, base + NvRegMSIMap1);
                  /* enable msi vector 0 */
                  writel(NVREG_MSI_VECTOR_0_ENABLED, base + NvRegMSIIrqMask);
            }
      }
      if (ret != 0) {
            if ((!intr_test && request_irq(np->pci_dev->irq, &nv_nic_irq, IRQF_SHARED, dev->name, dev) != 0) ||
                (intr_test && request_irq(np->pci_dev->irq, &nv_nic_irq_test, IRQF_SHARED, dev->name, dev) != 0))
                  goto out_err;

      }

      return 0;
out_free_tx:
      free_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector, dev);
out_free_rx:
      free_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector, dev);
out_err:
      return 1;
}

static void nv_free_irq(struct net_device *dev)
{
      struct fe_priv *np = get_nvpriv(dev);
      int i;

      if (np->msi_flags & NV_MSI_X_ENABLED) {
            for (i = 0; i < (np->msi_flags & NV_MSI_X_VECTORS_MASK); i++) {
                  free_irq(np->msi_x_entry[i].vector, dev);
            }
            pci_disable_msix(np->pci_dev);
            np->msi_flags &= ~NV_MSI_X_ENABLED;
      } else {
            free_irq(np->pci_dev->irq, dev);
            if (np->msi_flags & NV_MSI_ENABLED) {
                  pci_disable_msi(np->pci_dev);
                  np->msi_flags &= ~NV_MSI_ENABLED;
            }
      }
}

static void nv_do_nic_poll(unsigned long data)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 mask = 0;

      /*
       * First disable irq(s) and then
       * reenable interrupts on the nic, we have to do this before calling
       * nv_nic_irq because that may decide to do otherwise
       */

      if (!using_multi_irqs(dev)) {
            if (np->msi_flags & NV_MSI_X_ENABLED)
                  disable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
            else
                  disable_irq_lockdep(dev->irq);
            mask = np->irqmask;
      } else {
            if (np->nic_poll_irq & NVREG_IRQ_RX_ALL) {
                  disable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
                  mask |= NVREG_IRQ_RX_ALL;
            }
            if (np->nic_poll_irq & NVREG_IRQ_TX_ALL) {
                  disable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector);
                  mask |= NVREG_IRQ_TX_ALL;
            }
            if (np->nic_poll_irq & NVREG_IRQ_OTHER) {
                  disable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector);
                  mask |= NVREG_IRQ_OTHER;
            }
      }
      np->nic_poll_irq = 0;

      /* FIXME: Do we need synchronize_irq(dev->irq) here? */

      writel(mask, base + NvRegIrqMask);
      pci_push(base);

      if (!using_multi_irqs(dev)) {
            nv_nic_irq(0, dev, NULL);
            if (np->msi_flags & NV_MSI_X_ENABLED)
                  enable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
            else
                  enable_irq_lockdep(dev->irq);
      } else {
            if (np->nic_poll_irq & NVREG_IRQ_RX_ALL) {
                  nv_nic_irq_rx(0, dev, NULL);
                  enable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
            }
            if (np->nic_poll_irq & NVREG_IRQ_TX_ALL) {
                  nv_nic_irq_tx(0, dev, NULL);
                  enable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector);
            }
            if (np->nic_poll_irq & NVREG_IRQ_OTHER) {
                  nv_nic_irq_other(0, dev, NULL);
                  enable_irq_lockdep(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector);
            }
      }
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void nv_poll_controller(struct net_device *dev)
{
      nv_do_nic_poll((unsigned long) dev);
}
#endif

static void nv_do_stats_poll(unsigned long data)
{
      struct net_device *dev = (struct net_device *) data;
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);

      np->estats.tx_bytes += readl(base + NvRegTxCnt);
      np->estats.tx_zero_rexmt += readl(base + NvRegTxZeroReXmt);
      np->estats.tx_one_rexmt += readl(base + NvRegTxOneReXmt);
      np->estats.tx_many_rexmt += readl(base + NvRegTxManyReXmt);
      np->estats.tx_late_collision += readl(base + NvRegTxLateCol);
      np->estats.tx_fifo_errors += readl(base + NvRegTxUnderflow);
      np->estats.tx_carrier_errors += readl(base + NvRegTxLossCarrier);
      np->estats.tx_excess_deferral += readl(base + NvRegTxExcessDef);
      np->estats.tx_retry_error += readl(base + NvRegTxRetryErr);
      np->estats.tx_deferral += readl(base + NvRegTxDef);
      np->estats.tx_packets += readl(base + NvRegTxFrame);
      np->estats.tx_pause += readl(base + NvRegTxPause);
      np->estats.rx_frame_error += readl(base + NvRegRxFrameErr);
      np->estats.rx_extra_byte += readl(base + NvRegRxExtraByte);
      np->estats.rx_late_collision += readl(base + NvRegRxLateCol);
      np->estats.rx_runt += readl(base + NvRegRxRunt);
      np->estats.rx_frame_too_long += readl(base + NvRegRxFrameTooLong);
      np->estats.rx_over_errors += readl(base + NvRegRxOverflow);
      np->estats.rx_crc_errors += readl(base + NvRegRxFCSErr);
      np->estats.rx_frame_align_error += readl(base + NvRegRxFrameAlignErr);
      np->estats.rx_length_error += readl(base + NvRegRxLenErr);
      np->estats.rx_unicast += readl(base + NvRegRxUnicast);
      np->estats.rx_multicast += readl(base + NvRegRxMulticast);
      np->estats.rx_broadcast += readl(base + NvRegRxBroadcast);
      np->estats.rx_bytes += readl(base + NvRegRxCnt);
      np->estats.rx_pause += readl(base + NvRegRxPause);
      np->estats.rx_drop_frame += readl(base + NvRegRxDropFrame);
      np->estats.rx_packets =
            np->estats.rx_unicast +
            np->estats.rx_multicast +
            np->estats.rx_broadcast;
      np->estats.rx_errors_total =
            np->estats.rx_crc_errors +
            np->estats.rx_over_errors +
            np->estats.rx_frame_error +
            (np->estats.rx_frame_align_error - np->estats.rx_extra_byte) +
            np->estats.rx_late_collision +
            np->estats.rx_runt +
            np->estats.rx_frame_too_long;

      if (!np->in_shutdown)
            mod_timer(&np->stats_poll, jiffies + STATS_INTERVAL);
}

static void nv_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
      struct fe_priv *np = netdev_priv(dev);
      strcpy(info->driver, "forcedeth");
      strcpy(info->version, FORCEDETH_VERSION);
      strcpy(info->bus_info, pci_name(np->pci_dev));
}

static void nv_get_wol(struct net_device *dev, struct ethtool_wolinfo *wolinfo)
{
      struct fe_priv *np = netdev_priv(dev);
      wolinfo->supported = WAKE_MAGIC;

      spin_lock_irq(&np->lock);
      if (np->wolenabled)
            wolinfo->wolopts = WAKE_MAGIC;
      spin_unlock_irq(&np->lock);
}

static int nv_set_wol(struct net_device *dev, struct ethtool_wolinfo *wolinfo)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 flags = 0;

      if (wolinfo->wolopts == 0) {
            np->wolenabled = 0;
      } else if (wolinfo->wolopts & WAKE_MAGIC) {
            np->wolenabled = 1;
            flags = NVREG_WAKEUPFLAGS_ENABLE;
      }
      if (netif_running(dev)) {
            spin_lock_irq(&np->lock);
            writel(flags, base + NvRegWakeUpFlags);
            spin_unlock_irq(&np->lock);
      }
      return 0;
}

static int nv_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
      struct fe_priv *np = netdev_priv(dev);
      int adv;

      spin_lock_irq(&np->lock);
      ecmd->port = PORT_MII;
      if (!netif_running(dev)) {
            /* We do not track link speed / duplex setting if the
             * interface is disabled. Force a link check */
            if (nv_update_linkspeed(dev)) {
                  if (!netif_carrier_ok(dev))
                        netif_carrier_on(dev);
            } else {
                  if (netif_carrier_ok(dev))
                        netif_carrier_off(dev);
            }
      }

      if (netif_carrier_ok(dev)) {
            switch(np->linkspeed & (NVREG_LINKSPEED_MASK)) {
            case NVREG_LINKSPEED_10:
                  ecmd->speed = SPEED_10;
                  break;
            case NVREG_LINKSPEED_100:
                  ecmd->speed = SPEED_100;
                  break;
            case NVREG_LINKSPEED_1000:
                  ecmd->speed = SPEED_1000;
                  break;
            }
            ecmd->duplex = DUPLEX_HALF;
            if (np->duplex)
                  ecmd->duplex = DUPLEX_FULL;
      } else {
            ecmd->speed = -1;
            ecmd->duplex = -1;
      }

      ecmd->autoneg = np->autoneg;

      ecmd->advertising = ADVERTISED_MII;
      if (np->autoneg) {
            ecmd->advertising |= ADVERTISED_Autoneg;
            adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
            if (adv & ADVERTISE_10HALF)
                  ecmd->advertising |= ADVERTISED_10baseT_Half;
            if (adv & ADVERTISE_10FULL)
                  ecmd->advertising |= ADVERTISED_10baseT_Full;
            if (adv & ADVERTISE_100HALF)
                  ecmd->advertising |= ADVERTISED_100baseT_Half;
            if (adv & ADVERTISE_100FULL)
                  ecmd->advertising |= ADVERTISED_100baseT_Full;
            if (np->gigabit == PHY_GIGABIT) {
                  adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
                  if (adv & ADVERTISE_1000FULL)
                        ecmd->advertising |= ADVERTISED_1000baseT_Full;
            }
      }
      ecmd->supported = (SUPPORTED_Autoneg |
            SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
            SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
            SUPPORTED_MII);
      if (np->gigabit == PHY_GIGABIT)
            ecmd->supported |= SUPPORTED_1000baseT_Full;

      ecmd->phy_address = np->phyaddr;
      ecmd->transceiver = XCVR_EXTERNAL;

      /* ignore maxtxpkt, maxrxpkt for now */
      spin_unlock_irq(&np->lock);
      return 0;
}

static int nv_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
{
      struct fe_priv *np = netdev_priv(dev);

      if (ecmd->port != PORT_MII)
            return -EINVAL;
      if (ecmd->transceiver != XCVR_EXTERNAL)
            return -EINVAL;
      if (ecmd->phy_address != np->phyaddr) {
            /* TODO: support switching between multiple phys. Should be
             * trivial, but not enabled due to lack of test hardware. */
            return -EINVAL;
      }
      if (ecmd->autoneg == AUTONEG_ENABLE) {
            u32 mask;

            mask = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
                    ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
            if (np->gigabit == PHY_GIGABIT)
                  mask |= ADVERTISED_1000baseT_Full;

            if ((ecmd->advertising & mask) == 0)
                  return -EINVAL;

      } else if (ecmd->autoneg == AUTONEG_DISABLE) {
            /* Note: autonegotiation disable, speed 1000 intentionally
             * forbidden - noone should need that. */

            if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
                  return -EINVAL;
            if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
                  return -EINVAL;
      } else {
            return -EINVAL;
      }

      netif_carrier_off(dev);
      if (netif_running(dev)) {
            nv_disable_irq(dev);
            netif_tx_lock_bh(dev);
            spin_lock(&np->lock);
            /* stop engines */
            nv_stop_rx(dev);
            nv_stop_tx(dev);
            spin_unlock(&np->lock);
            netif_tx_unlock_bh(dev);
      }

      if (ecmd->autoneg == AUTONEG_ENABLE) {
            int adv, bmcr;

            np->autoneg = 1;

            /* advertise only what has been requested */
            adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
            adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
            if (ecmd->advertising & ADVERTISED_10baseT_Half)
                  adv |= ADVERTISE_10HALF;
            if (ecmd->advertising & ADVERTISED_10baseT_Full)
                  adv |= ADVERTISE_10FULL;
            if (ecmd->advertising & ADVERTISED_100baseT_Half)
                  adv |= ADVERTISE_100HALF;
            if (ecmd->advertising & ADVERTISED_100baseT_Full)
                  adv |= ADVERTISE_100FULL;
            if (np->pause_flags & NV_PAUSEFRAME_RX_REQ)  /* for rx we set both advertisments but disable tx pause */
                  adv |=  ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
            if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
                  adv |=  ADVERTISE_PAUSE_ASYM;
            mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv);

            if (np->gigabit == PHY_GIGABIT) {
                  adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
                  adv &= ~ADVERTISE_1000FULL;
                  if (ecmd->advertising & ADVERTISED_1000baseT_Full)
                        adv |= ADVERTISE_1000FULL;
                  mii_rw(dev, np->phyaddr, MII_CTRL1000, adv);
            }

            if (netif_running(dev))
                  printk(KERN_INFO "%s: link down.\n", dev->name);
            bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
            bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
            mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);

      } else {
            int adv, bmcr;

            np->autoneg = 0;

            adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
            adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
            if (ecmd->speed == SPEED_10 && ecmd->duplex == DUPLEX_HALF)
                  adv |= ADVERTISE_10HALF;
            if (ecmd->speed == SPEED_10 && ecmd->duplex == DUPLEX_FULL)
                  adv |= ADVERTISE_10FULL;
            if (ecmd->speed == SPEED_100 && ecmd->duplex == DUPLEX_HALF)
                  adv |= ADVERTISE_100HALF;
            if (ecmd->speed == SPEED_100 && ecmd->duplex == DUPLEX_FULL)
                  adv |= ADVERTISE_100FULL;
            np->pause_flags &= ~(NV_PAUSEFRAME_AUTONEG|NV_PAUSEFRAME_RX_ENABLE|NV_PAUSEFRAME_TX_ENABLE);
            if (np->pause_flags & NV_PAUSEFRAME_RX_REQ) {/* for rx we set both advertisments but disable tx pause */
                  adv |=  ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
                  np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
            }
            if (np->pause_flags & NV_PAUSEFRAME_TX_REQ) {
                  adv |=  ADVERTISE_PAUSE_ASYM;
                  np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
            }
            mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv);
            np->fixed_mode = adv;

            if (np->gigabit == PHY_GIGABIT) {
                  adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
                  adv &= ~ADVERTISE_1000FULL;
                  mii_rw(dev, np->phyaddr, MII_CTRL1000, adv);
            }

            bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
            bmcr &= ~(BMCR_ANENABLE|BMCR_SPEED100|BMCR_SPEED1000|BMCR_FULLDPLX);
            if (np->fixed_mode & (ADVERTISE_10FULL|ADVERTISE_100FULL))
                  bmcr |= BMCR_FULLDPLX;
            if (np->fixed_mode & (ADVERTISE_100HALF|ADVERTISE_100FULL))
                  bmcr |= BMCR_SPEED100;
            mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);
            if (np->phy_oui == PHY_OUI_MARVELL) {
                  /* reset the phy */
                  if (phy_reset(dev)) {
                        printk(KERN_INFO "%s: phy reset failed\n", dev->name);
                        return -EINVAL;
                  }
            } else if (netif_running(dev)) {
                  /* Wait a bit and then reconfigure the nic. */
                  udelay(10);
                  nv_linkchange(dev);
            }
      }

      if (netif_running(dev)) {
            nv_start_rx(dev);
            nv_start_tx(dev);
            nv_enable_irq(dev);
      }

      return 0;
}

#define FORCEDETH_REGS_VER    1

static int nv_get_regs_len(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      return np->register_size;
}

static void nv_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u32 *rbuf = buf;
      int i;

      regs->version = FORCEDETH_REGS_VER;
      spin_lock_irq(&np->lock);
      for (i = 0;i <= np->register_size/sizeof(u32); i++)
            rbuf[i] = readl(base + i*sizeof(u32));
      spin_unlock_irq(&np->lock);
}

static int nv_nway_reset(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      int ret;

      if (np->autoneg) {
            int bmcr;

            netif_carrier_off(dev);
            if (netif_running(dev)) {
                  nv_disable_irq(dev);
                  netif_tx_lock_bh(dev);
                  spin_lock(&np->lock);
                  /* stop engines */
                  nv_stop_rx(dev);
                  nv_stop_tx(dev);
                  spin_unlock(&np->lock);
                  netif_tx_unlock_bh(dev);
                  printk(KERN_INFO "%s: link down.\n", dev->name);
            }

            bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
            bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
            mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);

            if (netif_running(dev)) {
                  nv_start_rx(dev);
                  nv_start_tx(dev);
                  nv_enable_irq(dev);
            }
            ret = 0;
      } else {
            ret = -EINVAL;
      }

      return ret;
}

static int nv_set_tso(struct net_device *dev, u32 value)
{
      struct fe_priv *np = netdev_priv(dev);

      if ((np->driver_data & DEV_HAS_CHECKSUM))
            return ethtool_op_set_tso(dev, value);
      else
            return -EOPNOTSUPP;
}

static void nv_get_ringparam(struct net_device *dev, struct ethtool_ringparam* ring)
{
      struct fe_priv *np = netdev_priv(dev);

      ring->rx_max_pending = (np->desc_ver == DESC_VER_1) ? RING_MAX_DESC_VER_1 : RING_MAX_DESC_VER_2_3;
      ring->rx_mini_max_pending = 0;
      ring->rx_jumbo_max_pending = 0;
      ring->tx_max_pending = (np->desc_ver == DESC_VER_1) ? RING_MAX_DESC_VER_1 : RING_MAX_DESC_VER_2_3;

      ring->rx_pending = np->rx_ring_size;
      ring->rx_mini_pending = 0;
      ring->rx_jumbo_pending = 0;
      ring->tx_pending = np->tx_ring_size;
}

static int nv_set_ringparam(struct net_device *dev, struct ethtool_ringparam* ring)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      u8 *rxtx_ring, *rx_skbuff, *tx_skbuff, *rx_dma, *tx_dma, *tx_dma_len;
      dma_addr_t ring_addr;

      if (ring->rx_pending < RX_RING_MIN ||
          ring->tx_pending < TX_RING_MIN ||
          ring->rx_mini_pending != 0 ||
          ring->rx_jumbo_pending != 0 ||
          (np->desc_ver == DESC_VER_1 &&
           (ring->rx_pending > RING_MAX_DESC_VER_1 ||
            ring->tx_pending > RING_MAX_DESC_VER_1)) ||
          (np->desc_ver != DESC_VER_1 &&
           (ring->rx_pending > RING_MAX_DESC_VER_2_3 ||
            ring->tx_pending > RING_MAX_DESC_VER_2_3))) {
            return -EINVAL;
      }

      /* allocate new rings */
      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            rxtx_ring = pci_alloc_consistent(np->pci_dev,
                                  sizeof(struct ring_desc) * (ring->rx_pending + ring->tx_pending),
                                  &ring_addr);
      } else {
            rxtx_ring = pci_alloc_consistent(np->pci_dev,
                                  sizeof(struct ring_desc_ex) * (ring->rx_pending + ring->tx_pending),
                                  &ring_addr);
      }
      rx_skbuff = kmalloc(sizeof(struct sk_buff*) * ring->rx_pending, GFP_KERNEL);
      rx_dma = kmalloc(sizeof(dma_addr_t) * ring->rx_pending, GFP_KERNEL);
      tx_skbuff = kmalloc(sizeof(struct sk_buff*) * ring->tx_pending, GFP_KERNEL);
      tx_dma = kmalloc(sizeof(dma_addr_t) * ring->tx_pending, GFP_KERNEL);
      tx_dma_len = kmalloc(sizeof(unsigned int) * ring->tx_pending, GFP_KERNEL);
      if (!rxtx_ring || !rx_skbuff || !rx_dma || !tx_skbuff || !tx_dma || !tx_dma_len) {
            /* fall back to old rings */
            if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
                  if(rxtx_ring)
                        pci_free_consistent(np->pci_dev, sizeof(struct ring_desc) * (ring->rx_pending + ring->tx_pending),
                                        rxtx_ring, ring_addr);
            } else {
                  if (rxtx_ring)
                        pci_free_consistent(np->pci_dev, sizeof(struct ring_desc_ex) * (ring->rx_pending + ring->tx_pending),
                                        rxtx_ring, ring_addr);
            }
            if (rx_skbuff)
                  kfree(rx_skbuff);
            if (rx_dma)
                  kfree(rx_dma);
            if (tx_skbuff)
                  kfree(tx_skbuff);
            if (tx_dma)
                  kfree(tx_dma);
            if (tx_dma_len)
                  kfree(tx_dma_len);
            goto exit;
      }

      if (netif_running(dev)) {
            nv_disable_irq(dev);
            netif_tx_lock_bh(dev);
            spin_lock(&np->lock);
            /* stop engines */
            nv_stop_rx(dev);
            nv_stop_tx(dev);
            nv_txrx_reset(dev);
            /* drain queues */
            nv_drain_rx(dev);
            nv_drain_tx(dev);
            /* delete queues */
            free_rings(dev);
      }

      /* set new values */
      np->rx_ring_size = ring->rx_pending;
      np->tx_ring_size = ring->tx_pending;
      np->tx_limit_stop = ring->tx_pending - TX_LIMIT_DIFFERENCE;
      np->tx_limit_start = ring->tx_pending - TX_LIMIT_DIFFERENCE - 1;
      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            np->rx_ring.orig = (struct ring_desc*)rxtx_ring;
            np->tx_ring.orig = &np->rx_ring.orig[np->rx_ring_size];
      } else {
            np->rx_ring.ex = (struct ring_desc_ex*)rxtx_ring;
            np->tx_ring.ex = &np->rx_ring.ex[np->rx_ring_size];
      }
      np->rx_skbuff = (struct sk_buff**)rx_skbuff;
      np->rx_dma = (dma_addr_t*)rx_dma;
      np->tx_skbuff = (struct sk_buff**)tx_skbuff;
      np->tx_dma = (dma_addr_t*)tx_dma;
      np->tx_dma_len = (unsigned int*)tx_dma_len;
      np->ring_addr = ring_addr;

      memset(np->rx_skbuff, 0, sizeof(struct sk_buff*) * np->rx_ring_size);
      memset(np->rx_dma, 0, sizeof(dma_addr_t) * np->rx_ring_size);
      memset(np->tx_skbuff, 0, sizeof(struct sk_buff*) * np->tx_ring_size);
      memset(np->tx_dma, 0, sizeof(dma_addr_t) * np->tx_ring_size);
      memset(np->tx_dma_len, 0, sizeof(unsigned int) * np->tx_ring_size);

      if (netif_running(dev)) {
            /* reinit driver view of the queues */
            set_bufsize(dev);
            if (nv_init_ring(dev)) {
                  if (!np->in_shutdown)
                        mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
            }

            /* reinit nic view of the queues */
            writel(np->rx_buf_sz, base + NvRegOffloadConfig);
            setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
            writel( ((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
                  base + NvRegRingSizes);
            pci_push(base);
            writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
            pci_push(base);

            /* restart engines */
            nv_start_rx(dev);
            nv_start_tx(dev);
            spin_unlock(&np->lock);
            netif_tx_unlock_bh(dev);
            nv_enable_irq(dev);
      }
      return 0;
exit:
      return -ENOMEM;
}

static void nv_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam* pause)
{
      struct fe_priv *np = netdev_priv(dev);

      pause->autoneg = (np->pause_flags & NV_PAUSEFRAME_AUTONEG) != 0;
      pause->rx_pause = (np->pause_flags & NV_PAUSEFRAME_RX_ENABLE) != 0;
      pause->tx_pause = (np->pause_flags & NV_PAUSEFRAME_TX_ENABLE) != 0;
}

static int nv_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam* pause)
{
      struct fe_priv *np = netdev_priv(dev);
      int adv, bmcr;

      if ((!np->autoneg && np->duplex == 0) ||
          (np->autoneg && !pause->autoneg && np->duplex == 0)) {
            printk(KERN_INFO "%s: can not set pause settings when forced link is in half duplex.\n",
                   dev->name);
            return -EINVAL;
      }
      if (pause->tx_pause && !(np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE)) {
            printk(KERN_INFO "%s: hardware does not support tx pause frames.\n", dev->name);
            return -EINVAL;
      }

      netif_carrier_off(dev);
      if (netif_running(dev)) {
            nv_disable_irq(dev);
            netif_tx_lock_bh(dev);
            spin_lock(&np->lock);
            /* stop engines */
            nv_stop_rx(dev);
            nv_stop_tx(dev);
            spin_unlock(&np->lock);
            netif_tx_unlock_bh(dev);
      }

      np->pause_flags &= ~(NV_PAUSEFRAME_RX_REQ|NV_PAUSEFRAME_TX_REQ);
      if (pause->rx_pause)
            np->pause_flags |= NV_PAUSEFRAME_RX_REQ;
      if (pause->tx_pause)
            np->pause_flags |= NV_PAUSEFRAME_TX_REQ;

      if (np->autoneg && pause->autoneg) {
            np->pause_flags |= NV_PAUSEFRAME_AUTONEG;

            adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
            adv &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
            if (np->pause_flags & NV_PAUSEFRAME_RX_REQ) /* for rx we set both advertisments but disable tx pause */
                  adv |=  ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
            if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
                  adv |=  ADVERTISE_PAUSE_ASYM;
            mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv);

            if (netif_running(dev))
                  printk(KERN_INFO "%s: link down.\n", dev->name);
            bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
            bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
            mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);
      } else {
            np->pause_flags &= ~(NV_PAUSEFRAME_AUTONEG|NV_PAUSEFRAME_RX_ENABLE|NV_PAUSEFRAME_TX_ENABLE);
            if (pause->rx_pause)
                  np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
            if (pause->tx_pause)
                  np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE;

            if (!netif_running(dev))
                  nv_update_linkspeed(dev);
            else
                  nv_update_pause(dev, np->pause_flags);
      }

      if (netif_running(dev)) {
            nv_start_rx(dev);
            nv_start_tx(dev);
            nv_enable_irq(dev);
      }
      return 0;
}

static u32 nv_get_rx_csum(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      return (np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) != 0;
}

static int nv_set_rx_csum(struct net_device *dev, u32 data)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      int retcode = 0;

      if (np->driver_data & DEV_HAS_CHECKSUM) {

            if (((np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) && data) ||
                (!(np->txrxctl_bits & NVREG_TXRXCTL_RXCHECK) && !data)) {
                  /* already set or unset */
                  return 0;
            }

            if (data) {
                  np->txrxctl_bits |= NVREG_TXRXCTL_RXCHECK;
            } else if (!(np->vlanctl_bits & NVREG_VLANCONTROL_ENABLE)) {
                  np->txrxctl_bits &= ~NVREG_TXRXCTL_RXCHECK;
            } else {
                  printk(KERN_INFO "Can not disable rx checksum if vlan is enabled\n");
                  return -EINVAL;
            }

            if (netif_running(dev)) {
                  spin_lock_irq(&np->lock);
                  writel(np->txrxctl_bits, base + NvRegTxRxControl);
                  spin_unlock_irq(&np->lock);
            }
      } else {
            return -EINVAL;
      }

      return retcode;
}

static int nv_set_tx_csum(struct net_device *dev, u32 data)
{
      struct fe_priv *np = netdev_priv(dev);

      if (np->driver_data & DEV_HAS_CHECKSUM)
            return ethtool_op_set_tx_hw_csum(dev, data);
      else
            return -EOPNOTSUPP;
}

static int nv_set_sg(struct net_device *dev, u32 data)
{
      struct fe_priv *np = netdev_priv(dev);

      if (np->driver_data & DEV_HAS_CHECKSUM)
            return ethtool_op_set_sg(dev, data);
      else
            return -EOPNOTSUPP;
}

static int nv_get_stats_count(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);

      if (np->driver_data & DEV_HAS_STATISTICS)
            return (sizeof(struct nv_ethtool_stats)/sizeof(u64));
      else
            return 0;
}

static void nv_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *estats, u64 *buffer)
{
      struct fe_priv *np = netdev_priv(dev);

      /* update stats */
      nv_do_stats_poll((unsigned long)dev);

      memcpy(buffer, &np->estats, nv_get_stats_count(dev)*sizeof(u64));
}

static int nv_self_test_count(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);

      if (np->driver_data & DEV_HAS_TEST_EXTENDED)
            return NV_TEST_COUNT_EXTENDED;
      else
            return NV_TEST_COUNT_BASE;
}

static int nv_link_test(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      int mii_status;

      mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
      mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);

      /* check phy link status */
      if (!(mii_status & BMSR_LSTATUS))
            return 0;
      else
            return 1;
}

static int nv_register_test(struct net_device *dev)
{
      u8 __iomem *base = get_hwbase(dev);
      int i = 0;
      u32 orig_read, new_read;

      do {
            orig_read = readl(base + nv_registers_test[i].reg);

            /* xor with mask to toggle bits */
            orig_read ^= nv_registers_test[i].mask;

            writel(orig_read, base + nv_registers_test[i].reg);

            new_read = readl(base + nv_registers_test[i].reg);

            if ((new_read & nv_registers_test[i].mask) != (orig_read & nv_registers_test[i].mask))
                  return 0;

            /* restore original value */
            orig_read ^= nv_registers_test[i].mask;
            writel(orig_read, base + nv_registers_test[i].reg);

      } while (nv_registers_test[++i].reg != 0);

      return 1;
}

static int nv_interrupt_test(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      int ret = 1;
      int testcnt;
      u32 save_msi_flags, save_poll_interval = 0;

      if (netif_running(dev)) {
            /* free current irq */
            nv_free_irq(dev);
            save_poll_interval = readl(base+NvRegPollingInterval);
      }

      /* flag to test interrupt handler */
      np->intr_test = 0;

      /* setup test irq */
      save_msi_flags = np->msi_flags;
      np->msi_flags &= ~NV_MSI_X_VECTORS_MASK;
      np->msi_flags |= 0x001; /* setup 1 vector */
      if (nv_request_irq(dev, 1))
            return 0;

      /* setup timer interrupt */
      writel(NVREG_POLL_DEFAULT_CPU, base + NvRegPollingInterval);
      writel(NVREG_UNKSETUP6_VAL, base + NvRegUnknownSetupReg6);

      nv_enable_hw_interrupts(dev, NVREG_IRQ_TIMER);

      /* wait for at least one interrupt */
      msleep(100);

      spin_lock_irq(&np->lock);

      /* flag should be set within ISR */
      testcnt = np->intr_test;
      if (!testcnt)
            ret = 2;

      nv_disable_hw_interrupts(dev, NVREG_IRQ_TIMER);
      if (!(np->msi_flags & NV_MSI_X_ENABLED))
            writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
      else
            writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);

      spin_unlock_irq(&np->lock);

      nv_free_irq(dev);

      np->msi_flags = save_msi_flags;

      if (netif_running(dev)) {
            writel(save_poll_interval, base + NvRegPollingInterval);
            writel(NVREG_UNKSETUP6_VAL, base + NvRegUnknownSetupReg6);
            /* restore original irq */
            if (nv_request_irq(dev, 0))
                  return 0;
      }

      return ret;
}

static int nv_loopback_test(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      struct sk_buff *tx_skb, *rx_skb;
      dma_addr_t test_dma_addr;
      u32 tx_flags_extra = (np->desc_ver == DESC_VER_1 ? NV_TX_LASTPACKET : NV_TX2_LASTPACKET);
      u32 Flags;
      int len, i, pkt_len;
      u8 *pkt_data;
      u32 filter_flags = 0;
      u32 misc1_flags = 0;
      int ret = 1;

      if (netif_running(dev)) {
            nv_disable_irq(dev);
            filter_flags = readl(base + NvRegPacketFilterFlags);
            misc1_flags = readl(base + NvRegMisc1);
      } else {
            nv_txrx_reset(dev);
      }

      /* reinit driver view of the rx queue */
      set_bufsize(dev);
      nv_init_ring(dev);

      /* setup hardware for loopback */
      writel(NVREG_MISC1_FORCE, base + NvRegMisc1);
      writel(NVREG_PFF_ALWAYS | NVREG_PFF_LOOPBACK, base + NvRegPacketFilterFlags);

      /* reinit nic view of the rx queue */
      writel(np->rx_buf_sz, base + NvRegOffloadConfig);
      setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
      writel( ((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
            base + NvRegRingSizes);
      pci_push(base);

      /* restart rx engine */
      nv_start_rx(dev);
      nv_start_tx(dev);

      /* setup packet for tx */
      pkt_len = ETH_DATA_LEN;
      tx_skb = dev_alloc_skb(pkt_len);
      pkt_data = skb_put(tx_skb, pkt_len);
      for (i = 0; i < pkt_len; i++)
            pkt_data[i] = (u8)(i & 0xff);
      test_dma_addr = pci_map_single(np->pci_dev, tx_skb->data,
                               tx_skb->end-tx_skb->data, PCI_DMA_FROMDEVICE);

      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            np->tx_ring.orig[0].PacketBuffer = cpu_to_le32(test_dma_addr);
            np->tx_ring.orig[0].FlagLen = cpu_to_le32((pkt_len-1) | np->tx_flags | tx_flags_extra);
      } else {
            np->tx_ring.ex[0].PacketBufferHigh = cpu_to_le64(test_dma_addr) >> 32;
            np->tx_ring.ex[0].PacketBufferLow = cpu_to_le64(test_dma_addr) & 0x0FFFFFFFF;
            np->tx_ring.ex[0].FlagLen = cpu_to_le32((pkt_len-1) | np->tx_flags | tx_flags_extra);
      }
      writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
      pci_push(get_hwbase(dev));

      msleep(500);

      /* check for rx of the packet */
      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            Flags = le32_to_cpu(np->rx_ring.orig[0].FlagLen);
            len = nv_descr_getlength(&np->rx_ring.orig[0], np->desc_ver);

      } else {
            Flags = le32_to_cpu(np->rx_ring.ex[0].FlagLen);
            len = nv_descr_getlength_ex(&np->rx_ring.ex[0], np->desc_ver);
      }

      if (Flags & NV_RX_AVAIL) {
            ret = 0;
      } else if (np->desc_ver == DESC_VER_1) {
            if (Flags & NV_RX_ERROR)
                  ret = 0;
      } else {
            if (Flags & NV_RX2_ERROR) {
                  ret = 0;
            }
      }

      if (ret) {
            if (len != pkt_len) {
                  ret = 0;
                  dprintk(KERN_DEBUG "%s: loopback len mismatch %d vs %d\n",
                        dev->name, len, pkt_len);
            } else {
                  rx_skb = np->rx_skbuff[0];
                  for (i = 0; i < pkt_len; i++) {
                        if (rx_skb->data[i] != (u8)(i & 0xff)) {
                              ret = 0;
                              dprintk(KERN_DEBUG "%s: loopback pattern check failed on byte %d\n",
                                    dev->name, i);
                              break;
                        }
                  }
            }
      } else {
            dprintk(KERN_DEBUG "%s: loopback - did not receive test packet\n", dev->name);
      }

      pci_unmap_page(np->pci_dev, test_dma_addr,
                   tx_skb->end-tx_skb->data,
                   PCI_DMA_TODEVICE);
      dev_kfree_skb_any(tx_skb);

      /* stop engines */
      nv_stop_rx(dev);
      nv_stop_tx(dev);
      nv_txrx_reset(dev);
      /* drain rx queue */
      nv_drain_rx(dev);
      nv_drain_tx(dev);

      if (netif_running(dev)) {
            writel(misc1_flags, base + NvRegMisc1);
            writel(filter_flags, base + NvRegPacketFilterFlags);
            nv_enable_irq(dev);
      }

      return ret;
}

static void nv_self_test(struct net_device *dev, struct ethtool_test *test, u64 *buffer)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      int result;
      memset(buffer, 0, nv_self_test_count(dev)*sizeof(u64));

      if (!nv_link_test(dev)) {
            test->flags |= ETH_TEST_FL_FAILED;
            buffer[0] = 1;
      }

      if (test->flags & ETH_TEST_FL_OFFLINE) {
            if (netif_running(dev)) {
                  netif_stop_queue(dev);
                  netif_tx_lock_bh(dev);
                  spin_lock_irq(&np->lock);
                  nv_disable_hw_interrupts(dev, np->irqmask);
                  if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
                        writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
                  } else {
                        writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);
                  }
                  /* stop engines */
                  nv_stop_rx(dev);
                  nv_stop_tx(dev);
                  nv_txrx_reset(dev);
                  /* drain rx queue */
                  nv_drain_rx(dev);
                  nv_drain_tx(dev);
                  spin_unlock_irq(&np->lock);
                  netif_tx_unlock_bh(dev);
            }

            if (!nv_register_test(dev)) {
                  test->flags |= ETH_TEST_FL_FAILED;
                  buffer[1] = 1;
            }

            result = nv_interrupt_test(dev);
            if (result != 1) {
                  test->flags |= ETH_TEST_FL_FAILED;
                  buffer[2] = 1;
            }
            if (result == 0) {
                  /* bail out */
                  return;
            }

            if (!nv_loopback_test(dev)) {
                  test->flags |= ETH_TEST_FL_FAILED;
                  buffer[3] = 1;
            }

            if (netif_running(dev)) {
                  /* reinit driver view of the rx queue */
                  set_bufsize(dev);
                  if (nv_init_ring(dev)) {
                        if (!np->in_shutdown)
                              mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
                  }
                  /* reinit nic view of the rx queue */
                  writel(np->rx_buf_sz, base + NvRegOffloadConfig);
                  setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
                  writel( ((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
                        base + NvRegRingSizes);
                  pci_push(base);
                  writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
                  pci_push(base);
                  /* restart rx engine */
                  nv_start_rx(dev);
                  nv_start_tx(dev);
                  netif_start_queue(dev);
                  nv_enable_hw_interrupts(dev, np->irqmask);
            }
      }
}

static void nv_get_strings(struct net_device *dev, u32 stringset, u8 *buffer)
{
      switch (stringset) {
      case ETH_SS_STATS:
            memcpy(buffer, &nv_estats_str, nv_get_stats_count(dev)*sizeof(struct nv_ethtool_str));
            break;
      case ETH_SS_TEST:
            memcpy(buffer, &nv_etests_str, nv_self_test_count(dev)*sizeof(struct nv_ethtool_str));
            break;
      }
}

static struct ethtool_ops ops = {
      .get_drvinfo = nv_get_drvinfo,
      .get_link = ethtool_op_get_link,
      .get_wol = nv_get_wol,
      .set_wol = nv_set_wol,
      .get_settings = nv_get_settings,
      .set_settings = nv_set_settings,
      .get_regs_len = nv_get_regs_len,
      .get_regs = nv_get_regs,
      .nway_reset = nv_nway_reset,
      .get_perm_addr = ethtool_op_get_perm_addr,
      .get_tso = ethtool_op_get_tso,
      .set_tso = nv_set_tso,
      .get_ringparam = nv_get_ringparam,
      .set_ringparam = nv_set_ringparam,
      .get_pauseparam = nv_get_pauseparam,
      .set_pauseparam = nv_set_pauseparam,
      .get_rx_csum = nv_get_rx_csum,
      .set_rx_csum = nv_set_rx_csum,
      .get_tx_csum = ethtool_op_get_tx_csum,
      .set_tx_csum = nv_set_tx_csum,
      .get_sg = ethtool_op_get_sg,
      .set_sg = nv_set_sg,
      .get_strings = nv_get_strings,
      .get_stats_count = nv_get_stats_count,
      .get_ethtool_stats = nv_get_ethtool_stats,
      .self_test_count = nv_self_test_count,
      .self_test = nv_self_test,
};

static void nv_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
{
      struct fe_priv *np = get_nvpriv(dev);

      spin_lock_irq(&np->lock);

      /* save vlan group */
      np->vlangrp = grp;

      if (grp) {
            /* enable vlan on MAC */
            np->txrxctl_bits |= NVREG_TXRXCTL_VLANSTRIP | NVREG_TXRXCTL_VLANINS;
      } else {
            /* disable vlan on MAC */
            np->txrxctl_bits &= ~NVREG_TXRXCTL_VLANSTRIP;
            np->txrxctl_bits &= ~NVREG_TXRXCTL_VLANINS;
      }

      writel(np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);

      spin_unlock_irq(&np->lock);
};

static void nv_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
      /* nothing to do */
};

static int nv_open(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base = get_hwbase(dev);
      int ret = 1;
      int oom, i;

      dprintk(KERN_DEBUG "nv_open: begin\n");

      /* 1) erase previous misconfiguration */
      if (np->driver_data & DEV_HAS_POWER_CNTRL)
            nv_mac_reset(dev);
      /* 4.1-1: stop adapter: ignored, 4.3 seems to be overkill */
      writel(NVREG_MCASTADDRA_FORCE, base + NvRegMulticastAddrA);
      writel(0, base + NvRegMulticastAddrB);
      writel(0, base + NvRegMulticastMaskA);
      writel(0, base + NvRegMulticastMaskB);
      writel(0, base + NvRegPacketFilterFlags);

      writel(0, base + NvRegTransmitterControl);
      writel(0, base + NvRegReceiverControl);

      writel(0, base + NvRegAdapterControl);

      if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE)
            writel(NVREG_TX_PAUSEFRAME_DISABLE,  base + NvRegTxPauseFrame);

      /* 2) initialize descriptor rings */
      set_bufsize(dev);
      oom = nv_init_ring(dev);

      writel(0, base + NvRegLinkSpeed);
      writel(0, base + NvRegUnknownTransmitterReg);
      nv_txrx_reset(dev);
      writel(0, base + NvRegUnknownSetupReg6);

      np->in_shutdown = 0;

      /* 3) set mac address */
      nv_copy_mac_to_hw(dev);

      /* 4) give hw rings */
      setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
      writel( ((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
            base + NvRegRingSizes);

      /* 5) continue setup */
      writel(np->linkspeed, base + NvRegLinkSpeed);
      if (np->desc_ver == DESC_VER_1)
            writel(NVREG_TX_WM_DESC1_DEFAULT, base + NvRegTxWatermark);
      else
            writel(NVREG_TX_WM_DESC2_3_DEFAULT, base + NvRegTxWatermark);
      writel(np->txrxctl_bits, base + NvRegTxRxControl);
      writel(np->vlanctl_bits, base + NvRegVlanControl);
      pci_push(base);
      writel(NVREG_TXRXCTL_BIT1|np->txrxctl_bits, base + NvRegTxRxControl);
      reg_delay(dev, NvRegUnknownSetupReg5, NVREG_UNKSETUP5_BIT31, NVREG_UNKSETUP5_BIT31,
                  NV_SETUP5_DELAY, NV_SETUP5_DELAYMAX,
                  KERN_INFO "open: SetupReg5, Bit 31 remained off\n");

      writel(0, base + NvRegUnknownSetupReg4);
      writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
      writel(NVREG_MIISTAT_MASK2, base + NvRegMIIStatus);

      /* 6) continue setup */
      writel(NVREG_MISC1_FORCE | NVREG_MISC1_HD, base + NvRegMisc1);
      writel(readl(base + NvRegTransmitterStatus), base + NvRegTransmitterStatus);
      writel(NVREG_PFF_ALWAYS, base + NvRegPacketFilterFlags);
      writel(np->rx_buf_sz, base + NvRegOffloadConfig);

      writel(readl(base + NvRegReceiverStatus), base + NvRegReceiverStatus);
      get_random_bytes(&i, sizeof(i));
      writel(NVREG_RNDSEED_FORCE | (i&NVREG_RNDSEED_MASK), base + NvRegRandomSeed);
      writel(NVREG_TX_DEFERRAL_DEFAULT, base + NvRegTxDeferral);
      writel(NVREG_RX_DEFERRAL_DEFAULT, base + NvRegRxDeferral);
      if (poll_interval == -1) {
            if (optimization_mode == NV_OPTIMIZATION_MODE_THROUGHPUT)
                  writel(NVREG_POLL_DEFAULT_THROUGHPUT, base + NvRegPollingInterval);
            else
                  writel(NVREG_POLL_DEFAULT_CPU, base + NvRegPollingInterval);
      }
      else
            writel(poll_interval & 0xFFFF, base + NvRegPollingInterval);
      writel(NVREG_UNKSETUP6_VAL, base + NvRegUnknownSetupReg6);
      writel((np->phyaddr << NVREG_ADAPTCTL_PHYSHIFT)|NVREG_ADAPTCTL_PHYVALID|NVREG_ADAPTCTL_RUNNING,
                  base + NvRegAdapterControl);
      writel(NVREG_MIISPEED_BIT8|NVREG_MIIDELAY, base + NvRegMIISpeed);
      writel(NVREG_UNKSETUP4_VAL, base + NvRegUnknownSetupReg4);
      if (np->wolenabled)
            writel(NVREG_WAKEUPFLAGS_ENABLE , base + NvRegWakeUpFlags);

      i = readl(base + NvRegPowerState);
      if ( (i & NVREG_POWERSTATE_POWEREDUP) == 0)
            writel(NVREG_POWERSTATE_POWEREDUP|i, base + NvRegPowerState);

      pci_push(base);
      udelay(10);
      writel(readl(base + NvRegPowerState) | NVREG_POWERSTATE_VALID, base + NvRegPowerState);

      nv_disable_hw_interrupts(dev, np->irqmask);
      pci_push(base);
      writel(NVREG_MIISTAT_MASK2, base + NvRegMIIStatus);
      writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
      pci_push(base);

      if (nv_request_irq(dev, 0)) {
            goto out_drain;
      }

      /* ask for interrupts */
      nv_enable_hw_interrupts(dev, np->irqmask);

      spin_lock_irq(&np->lock);
      writel(NVREG_MCASTADDRA_FORCE, base + NvRegMulticastAddrA);
      writel(0, base + NvRegMulticastAddrB);
      writel(0, base + NvRegMulticastMaskA);
      writel(0, base + NvRegMulticastMaskB);
      writel(NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR, base + NvRegPacketFilterFlags);
      /* One manual link speed update: Interrupts are enabled, future link
       * speed changes cause interrupts and are handled by nv_link_irq().
       */
      {
            u32 miistat;
            miistat = readl(base + NvRegMIIStatus);
            writel(NVREG_MIISTAT_MASK, base + NvRegMIIStatus);
            dprintk(KERN_INFO "startup: got 0x%08x.\n", miistat);
      }
      /* set linkspeed to invalid value, thus force nv_update_linkspeed
       * to init hw */
      np->linkspeed = 0;
      ret = nv_update_linkspeed(dev);
      nv_start_rx(dev);
      nv_start_tx(dev);
      netif_start_queue(dev);
      if (ret) {
            netif_carrier_on(dev);
      } else {
            printk("%s: no link during initialization.\n", dev->name);
            netif_carrier_off(dev);
      }
      if (oom)
            mod_timer(&np->oom_kick, jiffies + OOM_REFILL);

      /* start statistics timer */
      if (np->driver_data & DEV_HAS_STATISTICS)
            mod_timer(&np->stats_poll, jiffies + STATS_INTERVAL);

      spin_unlock_irq(&np->lock);

      return 0;
out_drain:
      drain_ring(dev);
      return ret;
}

static int nv_close(struct net_device *dev)
{
      struct fe_priv *np = netdev_priv(dev);
      u8 __iomem *base;

      spin_lock_irq(&np->lock);
      np->in_shutdown = 1;
      spin_unlock_irq(&np->lock);
      synchronize_irq(dev->irq);

      del_timer_sync(&np->oom_kick);
      del_timer_sync(&np->nic_poll);
      del_timer_sync(&np->stats_poll);

      netif_stop_queue(dev);
      spin_lock_irq(&np->lock);
      nv_stop_tx(dev);
      nv_stop_rx(dev);
      nv_txrx_reset(dev);

      /* disable interrupts on the nic or we will lock up */
      base = get_hwbase(dev);
      nv_disable_hw_interrupts(dev, np->irqmask);
      pci_push(base);
      dprintk(KERN_INFO "%s: Irqmask is zero again\n", dev->name);

      spin_unlock_irq(&np->lock);

      nv_free_irq(dev);

      drain_ring(dev);

      if (np->wolenabled)
            nv_start_rx(dev);

      /* special op: write back the misordered MAC address - otherwise
       * the next nv_probe would see a wrong address.
       */
      writel(np->orig_mac[0], base + NvRegMacAddrA);
      writel(np->orig_mac[1], base + NvRegMacAddrB);

      /* FIXME: power down nic */

      return 0;
}

static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
{
      struct net_device *dev;
      struct fe_priv *np;
      unsigned long addr;
      u8 __iomem *base;
      int err, i;
      u32 powerstate;

      dev = alloc_etherdev(sizeof(struct fe_priv));
      err = -ENOMEM;
      if (!dev)
            goto out;

      np = netdev_priv(dev);
      np->pci_dev = pci_dev;
      spin_lock_init(&np->lock);
      SET_MODULE_OWNER(dev);
      SET_NETDEV_DEV(dev, &pci_dev->dev);

      init_timer(&np->oom_kick);
      np->oom_kick.data = (unsigned long) dev;
      np->oom_kick.function = &nv_do_rx_refill; /* timer handler */
      init_timer(&np->nic_poll);
      np->nic_poll.data = (unsigned long) dev;
      np->nic_poll.function = &nv_do_nic_poll;  /* timer handler */
      init_timer(&np->stats_poll);
      np->stats_poll.data = (unsigned long) dev;
      np->stats_poll.function = &nv_do_stats_poll;    /* timer handler */

      err = pci_enable_device(pci_dev);
      if (err) {
            printk(KERN_INFO "forcedeth: pci_enable_dev failed (%d) for device %s\n",
                        err, pci_name(pci_dev));
            goto out_free;
      }

      pci_set_master(pci_dev);

      err = pci_request_regions(pci_dev, DRV_NAME);
      if (err < 0)
            goto out_disable;

      if (id->driver_data & (DEV_HAS_VLAN|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_STATISTICS))
            np->register_size = NV_PCI_REGSZ_VER2;
      else
            np->register_size = NV_PCI_REGSZ_VER1;

      err = -EINVAL;
      addr = 0;
      for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
            dprintk(KERN_DEBUG "%s: resource %d start %p len %ld flags 0x%08lx.\n",
                        pci_name(pci_dev), i, (void*)pci_resource_start(pci_dev, i),
                        pci_resource_len(pci_dev, i),
                        pci_resource_flags(pci_dev, i));
            if (pci_resource_flags(pci_dev, i) & IORESOURCE_MEM &&
                        pci_resource_len(pci_dev, i) >= np->register_size) {
                  addr = pci_resource_start(pci_dev, i);
                  break;
            }
      }
      if (i == DEVICE_COUNT_RESOURCE) {
            printk(KERN_INFO "forcedeth: Couldn't find register window for device %s.\n",
                              pci_name(pci_dev));
            goto out_relreg;
      }

      /* copy of driver data */
      np->driver_data = id->driver_data;

      /* handle different descriptor versions */
      if (id->driver_data & DEV_HAS_HIGH_DMA) {
            /* packet format 3: supports 40-bit addressing */
            np->desc_ver = DESC_VER_3;
            np->txrxctl_bits = NVREG_TXRXCTL_DESC_3;
            if (dma_64bit) {
                  if (pci_set_dma_mask(pci_dev, DMA_39BIT_MASK)) {
                        printk(KERN_INFO "forcedeth: 64-bit DMA failed, using 32-bit addressing for device %s.\n",
                               pci_name(pci_dev));
                  } else {
                        dev->features |= NETIF_F_HIGHDMA;
                        printk(KERN_INFO "forcedeth: using HIGHDMA\n");
                  }
                  if (pci_set_consistent_dma_mask(pci_dev, DMA_39BIT_MASK)) {
                        printk(KERN_INFO "forcedeth: 64-bit DMA (consistent) failed, using 32-bit ring buffers for device %s.\n",
                               pci_name(pci_dev));
                  }
            }
      } else if (id->driver_data & DEV_HAS_LARGEDESC) {
            /* packet format 2: supports jumbo frames */
            np->desc_ver = DESC_VER_2;
            np->txrxctl_bits = NVREG_TXRXCTL_DESC_2;
      } else {
            /* original packet format */
            np->desc_ver = DESC_VER_1;
            np->txrxctl_bits = NVREG_TXRXCTL_DESC_1;
      }

      np->pkt_limit = NV_PKTLIMIT_1;
      if (id->driver_data & DEV_HAS_LARGEDESC)
            np->pkt_limit = NV_PKTLIMIT_2;

      if (id->driver_data & DEV_HAS_CHECKSUM) {
            np->txrxctl_bits |= NVREG_TXRXCTL_RXCHECK;
            dev->features |= NETIF_F_HW_CSUM | NETIF_F_SG;
#ifdef NETIF_F_TSO
            dev->features |= NETIF_F_TSO;
#endif
      }

      np->vlanctl_bits = 0;
      if (id->driver_data & DEV_HAS_VLAN) {
            np->vlanctl_bits = NVREG_VLANCONTROL_ENABLE;
            dev->features |= NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX;
            dev->vlan_rx_register = nv_vlan_rx_register;
            dev->vlan_rx_kill_vid = nv_vlan_rx_kill_vid;
      }

      np->msi_flags = 0;
      if ((id->driver_data & DEV_HAS_MSI) && msi) {
            np->msi_flags |= NV_MSI_CAPABLE;
      }
      if ((id->driver_data & DEV_HAS_MSI_X) && msix) {
            np->msi_flags |= NV_MSI_X_CAPABLE;
      }

      np->pause_flags = NV_PAUSEFRAME_RX_CAPABLE | NV_PAUSEFRAME_RX_REQ | NV_PAUSEFRAME_AUTONEG;
      if (id->driver_data & DEV_HAS_PAUSEFRAME_TX) {
            np->pause_flags |= NV_PAUSEFRAME_TX_CAPABLE | NV_PAUSEFRAME_TX_REQ;
      }


      err = -ENOMEM;
      np->base = ioremap(addr, np->register_size);
      if (!np->base)
            goto out_relreg;
      dev->base_addr = (unsigned long)np->base;

      dev->irq = pci_dev->irq;

      np->rx_ring_size = RX_RING_DEFAULT;
      np->tx_ring_size = TX_RING_DEFAULT;
      np->tx_limit_stop = np->tx_ring_size - TX_LIMIT_DIFFERENCE;
      np->tx_limit_start = np->tx_ring_size - TX_LIMIT_DIFFERENCE - 1;

      if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) {
            np->rx_ring.orig = pci_alloc_consistent(pci_dev,
                              sizeof(struct ring_desc) * (np->rx_ring_size + np->tx_ring_size),
                              &np->ring_addr);
            if (!np->rx_ring.orig)
                  goto out_unmap;
            np->tx_ring.orig = &np->rx_ring.orig[np->rx_ring_size];
      } else {
            np->rx_ring.ex = pci_alloc_consistent(pci_dev,
                              sizeof(struct ring_desc_ex) * (np->rx_ring_size + np->tx_ring_size),
                              &np->ring_addr);
            if (!np->rx_ring.ex)
                  goto out_unmap;
            np->tx_ring.ex = &np->rx_ring.ex[np->rx_ring_size];
      }
      np->rx_skbuff = kmalloc(sizeof(struct sk_buff*) * np->rx_ring_size, GFP_KERNEL);
      np->rx_dma = kmalloc(sizeof(dma_addr_t) * np->rx_ring_size, GFP_KERNEL);
      np->tx_skbuff = kmalloc(sizeof(struct sk_buff*) * np->tx_ring_size, GFP_KERNEL);
      np->tx_dma = kmalloc(sizeof(dma_addr_t) * np->tx_ring_size, GFP_KERNEL);
      np->tx_dma_len = kmalloc(sizeof(unsigned int) * np->tx_ring_size, GFP_KERNEL);
      if (!np->rx_skbuff || !np->rx_dma || !np->tx_skbuff || !np->tx_dma || !np->tx_dma_len)
            goto out_freering;
      memset(np->rx_skbuff, 0, sizeof(struct sk_buff*) * np->rx_ring_size);
      memset(np->rx_dma, 0, sizeof(dma_addr_t) * np->rx_ring_size);
      memset(np->tx_skbuff, 0, sizeof(struct sk_buff*) * np->tx_ring_size);
      memset(np->tx_dma, 0, sizeof(dma_addr_t) * np->tx_ring_size);
      memset(np->tx_dma_len, 0, sizeof(unsigned int) * np->tx_ring_size);

      dev->open = nv_open;
      dev->stop = nv_close;
      dev->hard_start_xmit = nv_start_xmit;
      dev->get_stats = nv_get_stats;
      dev->change_mtu = nv_change_mtu;
      dev->set_mac_address = nv_set_mac_address;
      dev->set_multicast_list = nv_set_multicast;
#ifdef CONFIG_NET_POLL_CONTROLLER
      dev->poll_controller = nv_poll_controller;
#endif
      SET_ETHTOOL_OPS(dev, &ops);
      dev->tx_timeout = nv_tx_timeout;
      dev->watchdog_timeo = NV_WATCHDOG_TIMEO;

      pci_set_drvdata(pci_dev, dev);

      /* read the mac address */
      base = get_hwbase(dev);
      np->orig_mac[0] = readl(base + NvRegMacAddrA);
      np->orig_mac[1] = readl(base + NvRegMacAddrB);

      dev->dev_addr[0] = (np->orig_mac[1] >>  8) & 0xff;
      dev->dev_addr[1] = (np->orig_mac[1] >>  0) & 0xff;
      dev->dev_addr[2] = (np->orig_mac[0] >> 24) & 0xff;
      dev->dev_addr[3] = (np->orig_mac[0] >> 16) & 0xff;
      dev->dev_addr[4] = (np->orig_mac[0] >>  8) & 0xff;
      dev->dev_addr[5] = (np->orig_mac[0] >>  0) & 0xff;
      memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);

      if (!is_valid_ether_addr(dev->perm_addr)) {
            /*
             * Bad mac address. At least one bios sets the mac address
             * to 01:23:45:67:89:ab
             */
            printk(KERN_ERR "%s: Invalid Mac address detected: %02x:%02x:%02x:%02x:%02x:%02x\n",
                  pci_name(pci_dev),
                  dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
                  dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
            printk(KERN_ERR "Please complain to your hardware vendor. Switching to a random MAC.\n");
            dev->dev_addr[0] = 0x00;
            dev->dev_addr[1] = 0x00;
            dev->dev_addr[2] = 0x6c;
            get_random_bytes(&dev->dev_addr[3], 3);
      }

      dprintk(KERN_DEBUG "%s: MAC Address %02x:%02x:%02x:%02x:%02x:%02x\n", pci_name(pci_dev),
                  dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
                  dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);

      /* disable WOL */
      writel(0, base + NvRegWakeUpFlags);
      np->wolenabled = 0;

      if (id->driver_data & DEV_HAS_POWER_CNTRL) {
            u8 revision_id;
            pci_read_config_byte(pci_dev, PCI_REVISION_ID, &revision_id);

            /* take phy and nic out of low power mode */
            powerstate = readl(base + NvRegPowerState2);
            powerstate &= ~NVREG_POWERSTATE2_POWERUP_MASK;
            if ((id->device == PCI_DEVICE_ID_NVIDIA_NVENET_12 ||
                 id->device == PCI_DEVICE_ID_NVIDIA_NVENET_13) &&
                revision_id >= 0xA3)
                  powerstate |= NVREG_POWERSTATE2_POWERUP_REV_A3;
            writel(powerstate, base + NvRegPowerState2);
      }

      if (np->desc_ver == DESC_VER_1) {
            np->tx_flags = NV_TX_VALID;
      } else {
            np->tx_flags = NV_TX2_VALID;
      }
      if (optimization_mode == NV_OPTIMIZATION_MODE_THROUGHPUT) {
            np->irqmask = NVREG_IRQMASK_THROUGHPUT;
            if (np->msi_flags & NV_MSI_X_CAPABLE) /* set number of vectors */
                  np->msi_flags |= 0x0003;
      } else {
            np->irqmask = NVREG_IRQMASK_CPU;
            if (np->msi_flags & NV_MSI_X_CAPABLE) /* set number of vectors */
                  np->msi_flags |= 0x0001;
      }

      if (id->driver_data & DEV_NEED_TIMERIRQ)
            np->irqmask |= NVREG_IRQ_TIMER;
      if (id->driver_data & DEV_NEED_LINKTIMER) {
            dprintk(KERN_INFO "%s: link timer on.\n", pci_name(pci_dev));
            np->need_linktimer = 1;
            np->link_timeout = jiffies + LINK_TIMEOUT;
      } else {
            dprintk(KERN_INFO "%s: link timer off.\n", pci_name(pci_dev));
            np->need_linktimer = 0;
      }

      /* find a suitable phy */
      for (i = 1; i <= 32; i++) {
            int id1, id2;
            int phyaddr = i & 0x1F;

            spin_lock_irq(&np->lock);
            id1 = mii_rw(dev, phyaddr, MII_PHYSID1, MII_READ);
            spin_unlock_irq(&np->lock);
            if (id1 < 0 || id1 == 0xffff)
                  continue;
            spin_lock_irq(&np->lock);
            id2 = mii_rw(dev, phyaddr, MII_PHYSID2, MII_READ);
            spin_unlock_irq(&np->lock);
            if (id2 < 0 || id2 == 0xffff)
                  continue;

            id1 = (id1 & PHYID1_OUI_MASK) << PHYID1_OUI_SHFT;
            id2 = (id2 & PHYID2_OUI_MASK) >> PHYID2_OUI_SHFT;
            dprintk(KERN_DEBUG "%s: open: Found PHY %04x:%04x at address %d.\n",
                  pci_name(pci_dev), id1, id2, phyaddr);
            np->phyaddr = phyaddr;
            np->phy_oui = id1 | id2;
            break;
      }
      if (i == 33) {
            printk(KERN_INFO "%s: open: Could not find a valid PHY.\n",
                   pci_name(pci_dev));
            goto out_error;
      }

      /* reset it */
      phy_init(dev);

      /* set default link speed settings */
      np->linkspeed = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
      np->duplex = 0;
      np->autoneg = 1;

      err = register_netdev(dev);
      if (err) {
            printk(KERN_INFO "forcedeth: unable to register netdev: %d\n", err);
            goto out_error;
      }
      printk(KERN_INFO "%s: forcedeth.c: subsystem: %05x:%04x bound to %s\n",
                  dev->name, pci_dev->subsystem_vendor, pci_dev->subsystem_device,
                  pci_name(pci_dev));

      return 0;

out_error:
      pci_set_drvdata(pci_dev, NULL);
out_freering:
      free_rings(dev);
out_unmap:
      iounmap(get_hwbase(dev));
out_relreg:
      pci_release_regions(pci_dev);
out_disable:
      pci_disable_device(pci_dev);
out_free:
      free_netdev(dev);
out:
      return err;
}

static void __devexit nv_remove(struct pci_dev *pci_dev)
{
      struct net_device *dev = pci_get_drvdata(pci_dev);

      unregister_netdev(dev);

      /* free all structures */
      free_rings(dev);
      iounmap(get_hwbase(dev));
      pci_release_regions(pci_dev);
      pci_disable_device(pci_dev);
      free_netdev(dev);
      pci_set_drvdata(pci_dev, NULL);
}

static struct pci_device_id pci_tbl[] = {
      {     /* nForce Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_1),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
      },
      {     /* nForce2 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_2),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
      },
      {     /* nForce3 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_3),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
      },
      {     /* nForce3 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_4),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
      },
      {     /* nForce3 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_5),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
      },
      {     /* nForce3 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_6),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
      },
      {     /* nForce3 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_7),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
      },
      {     /* CK804 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_8),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA,
      },
      {     /* CK804 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_9),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA,
      },
      {     /* MCP04 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_10),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA,
      },
      {     /* MCP04 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_11),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA,
      },
      {     /* MCP51 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_12),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL,
      },
      {     /* MCP51 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_13),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL,
      },
      {     /* MCP55 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_14),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP55 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_15),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP61 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_16),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP61 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_17),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP61 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_18),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP61 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_19),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP65 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_20),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP65 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_21),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP65 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_22),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {     /* MCP65 Ethernet Controller */
            PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NVENET_23),
            .driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX|DEV_HAS_STATISTICS|DEV_HAS_TEST_EXTENDED,
      },
      {0,},
};

static struct pci_driver driver = {
      .name = "forcedeth",
      .id_table = pci_tbl,
      .probe = nv_probe,
      .remove = __devexit_p(nv_remove),
};


static int __init init_nic(void)
{
      printk(KERN_INFO "forcedeth.c: Reverse Engineered nForce ethernet driver. Version %s.\n", FORCEDETH_VERSION);
      return pci_module_init(&driver);
}

static void __exit exit_nic(void)
{
      pci_unregister_driver(&driver);
}

module_param(max_interrupt_work, int, 0);
MODULE_PARM_DESC(max_interrupt_work, "forcedeth maximum events handled per interrupt");
module_param(optimization_mode, int, 0);
MODULE_PARM_DESC(optimization_mode, "In throughput mode (0), every tx & rx packet will generate an interrupt. In CPU mode (1), interrupts are controlled by a timer.");
module_param(poll_interval, int, 0);
MODULE_PARM_DESC(poll_interval, "Interval determines how frequent timer interrupt is generated by [(time_in_micro_secs * 100) / (2^10)]. Min is 0 and Max is 65535.");
module_param(msi, int, 0);
MODULE_PARM_DESC(msi, "MSI interrupts are enabled by setting to 1 and disabled by setting to 0.");
module_param(msix, int, 0);
MODULE_PARM_DESC(msix, "MSIX interrupts are enabled by setting to 1 and disabled by setting to 0.");
module_param(dma_64bit, int, 0);
MODULE_PARM_DESC(dma_64bit, "High DMA is enabled by setting to 1 and disabled by setting to 0.");

MODULE_AUTHOR("Manfred Spraul <manfred@colorfullife.com>");
MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver");
MODULE_LICENSE("GPL");

MODULE_DEVICE_TABLE(pci, pci_tbl);

module_init(init_nic);
module_exit(exit_nic);

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