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skgesirq.c

/******************************************************************************
 *
 * Name:    skgesirq.c
 * Project: Gigabit Ethernet Adapters, Common Modules
 * Version: $Revision: 1.92 $
 * Date:    $Date: 2003/09/16 14:37:07 $
 * Purpose: Special IRQ module
 *
 ******************************************************************************/

/******************************************************************************
 *
 *    (C)Copyright 1998-2002 SysKonnect.
 *    (C)Copyright 2002-2003 Marvell.
 *
 *    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.
 *
 *    The information in this file is provided "AS IS" without warranty.
 *
 ******************************************************************************/

/*
 *    Special Interrupt handler
 *
 *    The following abstract should show how this module is included
 *    in the driver path:
 *
 *    In the ISR of the driver the bits for frame transmission complete and
 *    for receive complete are checked and handled by the driver itself.
 *    The bits of the slow path mask are checked after that and then the
 *    entry into the so-called "slow path" is prepared. It is an implementors
 *    decision whether this is executed directly or just scheduled by
 *    disabling the mask. In the interrupt service routine some events may be
 *    generated, so it would be a good idea to call the EventDispatcher
 *    right after this ISR.
 *
 *    The Interrupt source register of the adapter is NOT read by this module.
 *  SO if the drivers implementor needs a while loop around the
 *    slow data paths interrupt bits, he needs to call the SkGeSirqIsr() for
 *    each loop entered.
 *
 *    However, the MAC Interrupt status registers are read in a while loop.
 *
 */

#if (defined(DEBUG) || ((!defined(LINT)) && (!defined(SK_SLIM))))
static const char SysKonnectFileId[] =
      "@(#) $Id: skgesirq.c,v 1.92 2003/09/16 14:37:07 rschmidt Exp $ (C) Marvell.";
#endif

#include "h/skdrv1st.h"       /* Driver Specific Definitions */
#ifndef SK_SLIM
#include "h/skgepnmi.h"       /* PNMI Definitions */
#include "h/skrlmt.h"         /* RLMT Definitions */
#endif
#include "h/skdrv2nd.h"       /* Adapter Control and Driver specific Def. */

/* local function prototypes */
#ifdef GENESIS
static int  SkGePortCheckUpXmac(SK_AC*, SK_IOC, int, SK_BOOL);
static int  SkGePortCheckUpBcom(SK_AC*, SK_IOC, int, SK_BOOL);
static void SkPhyIsrBcom(SK_AC*, SK_IOC, int, SK_U16);
#endif /* GENESIS */
#ifdef YUKON
static int  SkGePortCheckUpGmac(SK_AC*, SK_IOC, int, SK_BOOL);
static void SkPhyIsrGmac(SK_AC*, SK_IOC, int, SK_U16);
#endif /* YUKON */
#ifdef OTHER_PHY
static int  SkGePortCheckUpLone(SK_AC*, SK_IOC, int, SK_BOOL);
static int  SkGePortCheckUpNat(SK_AC*, SK_IOC, int, SK_BOOL);
static void SkPhyIsrLone(SK_AC*, SK_IOC, int, SK_U16);
#endif /* OTHER_PHY */

#ifdef GENESIS
/*
 * array of Rx counter from XMAC which are checked
 * in AutoSense mode to check whether a link is not able to auto-negotiate.
 */
static const SK_U16 SkGeRxRegs[]= {
      XM_RXF_64B,
      XM_RXF_127B,
      XM_RXF_255B,
      XM_RXF_511B,
      XM_RXF_1023B,
      XM_RXF_MAX_SZ
} ;
#endif /* GENESIS */

#ifdef __C2MAN__
/*
 *    Special IRQ function
 *
 *    General Description:
 *
 */
intro()
{}
#endif

/******************************************************************************
 *
 *    SkHWInitDefSense() - Default Autosensing mode initialization
 *
 * Description: sets the PLinkMode for HWInit
 *
 * Returns: N/A
 */
static void SkHWInitDefSense(
SK_AC *pAC, /* adapter context */
SK_IOC      IoC,  /* IO context */
int         Port) /* Port Index (MAC_1 + n) */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */

      pPrt = &pAC->GIni.GP[Port];

      pPrt->PAutoNegTimeOut = 0;

      if (pPrt->PLinkModeConf != SK_LMODE_AUTOSENSE) {
            pPrt->PLinkMode = pPrt->PLinkModeConf;
            return;
      }

      SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
            ("AutoSensing: First mode %d on Port %d\n",
            (int)SK_LMODE_AUTOFULL, Port));

      pPrt->PLinkMode = (SK_U8)SK_LMODE_AUTOFULL;

      return;
}     /* SkHWInitDefSense */


#ifdef GENESIS
/******************************************************************************
 *
 *    SkHWSenseGetNext() - Get Next Autosensing Mode
 *
 * Description: gets the appropriate next mode
 *
 * Note:
 *
 */
static SK_U8 SkHWSenseGetNext(
SK_AC *pAC, /* adapter context */
SK_IOC      IoC,  /* IO context */
int         Port) /* Port Index (MAC_1 + n) */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */

      pPrt = &pAC->GIni.GP[Port];

      pPrt->PAutoNegTimeOut = 0;

    if (pPrt->PLinkModeConf != (SK_U8)SK_LMODE_AUTOSENSE) {
            /* Leave all as configured */
            return(pPrt->PLinkModeConf);
      }

    if (pPrt->PLinkMode == (SK_U8)SK_LMODE_AUTOFULL) {
            /* Return next mode AUTOBOTH */
        return ((SK_U8)SK_LMODE_AUTOBOTH);
      }

      /* Return default autofull */
    return ((SK_U8)SK_LMODE_AUTOFULL);
}     /* SkHWSenseGetNext */


/******************************************************************************
 *
 *    SkHWSenseSetNext() - Autosensing Set next mode
 *
 * Description:   sets the appropriate next mode
 *
 * Returns: N/A
 */
static void SkHWSenseSetNext(
SK_AC *pAC,       /* adapter context */
SK_IOC      IoC,        /* IO context */
int         Port,       /* Port Index (MAC_1 + n) */
SK_U8 NewMode)    /* New Mode to be written in sense mode */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */

      pPrt = &pAC->GIni.GP[Port];

      pPrt->PAutoNegTimeOut = 0;

    if (pPrt->PLinkModeConf != (SK_U8)SK_LMODE_AUTOSENSE) {
            return;
      }

      SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
            ("AutoSensing: next mode %d on Port %d\n",
            (int)NewMode, Port));

      pPrt->PLinkMode = NewMode;

      return;
}     /* SkHWSenseSetNext */
#endif /* GENESIS */


/******************************************************************************
 *
 *    SkHWLinkDown() - Link Down handling
 *
 * Description: handles the hardware link down signal
 *
 * Returns: N/A
 */
void SkHWLinkDown(
SK_AC *pAC,       /* adapter context */
SK_IOC      IoC,        /* IO context */
int         Port)       /* Port Index (MAC_1 + n) */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */

      pPrt = &pAC->GIni.GP[Port];

      /* Disable all MAC interrupts */
      SkMacIrqDisable(pAC, IoC, Port);

      /* Disable Receiver and Transmitter */
      SkMacRxTxDisable(pAC, IoC, Port);
      
      /* Init default sense mode */
      SkHWInitDefSense(pAC, IoC, Port);

      if (pPrt->PHWLinkUp == SK_FALSE) {
            return;
      }

      SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
            ("Link down Port %d\n", Port));

      /* Set Link to DOWN */
      pPrt->PHWLinkUp = SK_FALSE;

      /* Reset Port stati */
    pPrt->PLinkModeStatus = (SK_U8)SK_LMODE_STAT_UNKNOWN;
    pPrt->PFlowCtrlStatus = (SK_U8)SK_FLOW_STAT_NONE;
      pPrt->PLinkSpeedUsed = (SK_U8)SK_LSPEED_STAT_INDETERMINATED;

      /* Re-init Phy especially when the AutoSense default is set now */
      SkMacInitPhy(pAC, IoC, Port, SK_FALSE);

      /* GP0: used for workaround of Rev. C Errata 2 */

      /* Do NOT signal to RLMT */

      /* Do NOT start the timer here */
}     /* SkHWLinkDown */


/******************************************************************************
 *
 *    SkHWLinkUp() - Link Up handling
 *
 * Description: handles the hardware link up signal
 *
 * Returns: N/A
 */
static void SkHWLinkUp(
SK_AC *pAC, /* adapter context */
SK_IOC      IoC,  /* IO context */
int         Port) /* Port Index (MAC_1 + n) */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */

      pPrt = &pAC->GIni.GP[Port];

      if (pPrt->PHWLinkUp) {
            /* We do NOT need to proceed on active link */
            return;
      }

      pPrt->PHWLinkUp = SK_TRUE;
      pPrt->PAutoNegFail = SK_FALSE;
    pPrt->PLinkModeStatus = (SK_U8)SK_LMODE_STAT_UNKNOWN;

    if (pPrt->PLinkMode != (SK_U8)SK_LMODE_AUTOHALF &&
        pPrt->PLinkMode != (SK_U8)SK_LMODE_AUTOFULL &&
        pPrt->PLinkMode != (SK_U8)SK_LMODE_AUTOBOTH) {
            /* Link is up and no Auto-negotiation should be done */

            /* Link speed should be the configured one */
            switch (pPrt->PLinkSpeed) {
            case SK_LSPEED_AUTO:
                  /* default is 1000 Mbps */
            case SK_LSPEED_1000MBPS:
                  pPrt->PLinkSpeedUsed = (SK_U8)SK_LSPEED_STAT_1000MBPS;
                  break;
            case SK_LSPEED_100MBPS:
                  pPrt->PLinkSpeedUsed = (SK_U8)SK_LSPEED_STAT_100MBPS;
                  break;
            case SK_LSPEED_10MBPS:
                  pPrt->PLinkSpeedUsed = (SK_U8)SK_LSPEED_STAT_10MBPS;
                  break;
            }

            /* Set Link Mode Status */
            if (pPrt->PLinkMode == SK_LMODE_FULL) {
                  pPrt->PLinkModeStatus = (SK_U8)SK_LMODE_STAT_FULL;
            }
            else {
            pPrt->PLinkModeStatus = (SK_U8)SK_LMODE_STAT_HALF;
            }

            /* No flow control without auto-negotiation */
        pPrt->PFlowCtrlStatus = (SK_U8)SK_FLOW_STAT_NONE;

            /* enable Rx/Tx */
        (void)SkMacRxTxEnable(pAC, IoC, Port);
      }
}     /* SkHWLinkUp */


/******************************************************************************
 *
 *    SkMacParity() - MAC parity workaround
 *
 * Description: handles MAC parity errors correctly
 *
 * Returns: N/A
 */
static void SkMacParity(
SK_AC *pAC, /* adapter context */
SK_IOC      IoC,  /* IO context */
int         Port) /* Port Index of the port failed */
{
      SK_EVPARA   Para;
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      SK_U32            TxMax;            /* Tx Max Size Counter */

      pPrt = &pAC->GIni.GP[Port];

      /* Clear IRQ Tx Parity Error */
#ifdef GENESIS
      if (pAC->GIni.GIGenesis) {

            SK_OUT16(IoC, MR_ADDR(Port, TX_MFF_CTRL1), MFF_CLR_PERR);
      }
#endif /* GENESIS */
      
#ifdef YUKON
      if (pAC->GIni.GIYukon) {
            /* HW-Bug #8: cleared by GMF_CLI_TX_FC instead of GMF_CLI_TX_PE */
            SK_OUT8(IoC, MR_ADDR(Port, TX_GMF_CTRL_T),
                  (SK_U8)((pAC->GIni.GIChipId == CHIP_ID_YUKON &&
                  pAC->GIni.GIChipRev == 0) ? GMF_CLI_TX_FC : GMF_CLI_TX_PE));
      }
#endif /* YUKON */
      
      if (pPrt->PCheckPar) {

            if (Port == MAC_1) {
                  SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E016, SKERR_SIRQ_E016MSG);
            }
            else {
                  SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E017, SKERR_SIRQ_E017MSG);
            }
            Para.Para64 = Port;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            
            Para.Para32[0] = Port;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);

            return;
      }

      /* Check whether frames with a size of 1k were sent */
#ifdef GENESIS
      if (pAC->GIni.GIGenesis) {
            /* Snap statistic counters */
            (void)SkXmUpdateStats(pAC, IoC, Port);
            
            (void)SkXmMacStatistic(pAC, IoC, Port, XM_TXF_MAX_SZ, &TxMax);
      }
#endif /* GENESIS */
      
#ifdef YUKON
      if (pAC->GIni.GIYukon) {

            (void)SkGmMacStatistic(pAC, IoC, Port, GM_TXF_1518B, &TxMax);
      }
#endif /* YUKON */
      
      if (TxMax > 0) {
            /* From now on check the parity */
            pPrt->PCheckPar = SK_TRUE;
      }
}     /* SkMacParity */


/******************************************************************************
 *
 *    SkGeHwErr() - Hardware Error service routine
 *
 * Description: handles all HW Error interrupts
 *
 * Returns: N/A
 */
static void SkGeHwErr(
SK_AC *pAC,       /* adapter context */
SK_IOC      IoC,        /* IO context */
SK_U32      HwStatus)   /* Interrupt status word */
{
      SK_EVPARA   Para;
      SK_U16            Word;

      if ((HwStatus & (IS_IRQ_MST_ERR | IS_IRQ_STAT)) != 0) {
            /* PCI Errors occured */
            if ((HwStatus & IS_IRQ_STAT) != 0) {
                  SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E013, SKERR_SIRQ_E013MSG);
            }
            else {
                  SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E012, SKERR_SIRQ_E012MSG);
            }

            /* Reset all bits in the PCI STATUS register */
            SK_IN16(IoC, PCI_C(PCI_STATUS), &Word);
            
            SK_OUT8(IoC, B2_TST_CTRL1, TST_CFG_WRITE_ON);
        SK_OUT16(IoC, PCI_C(PCI_STATUS), (SK_U16)(Word | PCI_ERRBITS));
            SK_OUT8(IoC, B2_TST_CTRL1, TST_CFG_WRITE_OFF);

            Para.Para64 = 0;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_ADAP_FAIL, Para);
      }

#ifdef GENESIS
      if (pAC->GIni.GIGenesis) {

            if ((HwStatus & IS_NO_STAT_M1) != 0) {
                  /* Ignore it */
                  /* This situation is also indicated in the descriptor */
                  SK_OUT16(IoC, MR_ADDR(MAC_1, RX_MFF_CTRL1), MFF_CLR_INSTAT);
            }

            if ((HwStatus & IS_NO_STAT_M2) != 0) {
                  /* Ignore it */
                  /* This situation is also indicated in the descriptor */
                  SK_OUT16(IoC, MR_ADDR(MAC_2, RX_MFF_CTRL1), MFF_CLR_INSTAT);
            }

            if ((HwStatus & IS_NO_TIST_M1) != 0) {
                  /* Ignore it */
                  /* This situation is also indicated in the descriptor */
                  SK_OUT16(IoC, MR_ADDR(MAC_1, RX_MFF_CTRL1), MFF_CLR_INTIST);
            }

            if ((HwStatus & IS_NO_TIST_M2) != 0) {
                  /* Ignore it */
                  /* This situation is also indicated in the descriptor */
                  SK_OUT16(IoC, MR_ADDR(MAC_2, RX_MFF_CTRL1), MFF_CLR_INTIST);
            }
      }
#endif /* GENESIS */
      
#ifdef YUKON
      if (pAC->GIni.GIYukon) {
            /* This is necessary only for Rx timing measurements */
            if ((HwStatus & IS_IRQ_TIST_OV) != 0) {
                  /* increment Time Stamp Timer counter (high) */
                  pAC->GIni.GITimeStampCnt++;

                  /* Clear Time Stamp Timer IRQ */
                  SK_OUT8(IoC, GMAC_TI_ST_CTRL, (SK_U8)GMT_ST_CLR_IRQ);
            }

            if ((HwStatus & IS_IRQ_SENSOR) != 0) {
                  /* no sensors on 32-bit Yukon */
                  if (pAC->GIni.GIYukon32Bit) {
                        /* disable HW Error IRQ */
                        pAC->GIni.GIValIrqMask &= ~IS_HW_ERR;
                  }
            }
      }
#endif /* YUKON */

      if ((HwStatus & IS_RAM_RD_PAR) != 0) {
            SK_OUT16(IoC, B3_RI_CTRL, RI_CLR_RD_PERR);
            SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E014, SKERR_SIRQ_E014MSG);
            Para.Para64 = 0;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_ADAP_FAIL, Para);
      }

      if ((HwStatus & IS_RAM_WR_PAR) != 0) {
            SK_OUT16(IoC, B3_RI_CTRL, RI_CLR_WR_PERR);
            SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E015, SKERR_SIRQ_E015MSG);
            Para.Para64 = 0;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_ADAP_FAIL, Para);
      }

      if ((HwStatus & IS_M1_PAR_ERR) != 0) {
            SkMacParity(pAC, IoC, MAC_1);
      }

      if ((HwStatus & IS_M2_PAR_ERR) != 0) {
            SkMacParity(pAC, IoC, MAC_2);
      }

      if ((HwStatus & IS_R1_PAR_ERR) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_R1_CSR, CSR_IRQ_CL_P);

            SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E018, SKERR_SIRQ_E018MSG);
            Para.Para64 = MAC_1;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            
            Para.Para32[0] = MAC_1;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

      if ((HwStatus & IS_R2_PAR_ERR) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_R2_CSR, CSR_IRQ_CL_P);

            SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E019, SKERR_SIRQ_E019MSG);
            Para.Para64 = MAC_2;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            
            Para.Para32[0] = MAC_2;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }
}     /* SkGeHwErr */


/******************************************************************************
 *
 *    SkGeSirqIsr() - Special Interrupt Service Routine
 *
 * Description: handles all non data transfer specific interrupts (slow path)
 *
 * Returns: N/A
 */
void SkGeSirqIsr(
SK_AC *pAC,       /* adapter context */
SK_IOC      IoC,        /* IO context */
SK_U32      Istatus)    /* Interrupt status word */
{
      SK_EVPARA   Para;
      SK_U32            RegVal32;   /* Read register value */
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      SK_U16            PhyInt;
      int               i;

      if (((Istatus & IS_HW_ERR) & pAC->GIni.GIValIrqMask) != 0) {
            /* read the HW Error Interrupt source */
            SK_IN32(IoC, B0_HWE_ISRC, &RegVal32);
            
            SkGeHwErr(pAC, IoC, RegVal32);
      }

      /*
       * Packet Timeout interrupts
       */
      /* Check whether MACs are correctly initialized */
      if (((Istatus & (IS_PA_TO_RX1 | IS_PA_TO_TX1)) != 0) &&
            pAC->GIni.GP[MAC_1].PState == SK_PRT_RESET) {
            /* MAC 1 was not initialized but Packet timeout occured */
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E004,
                  SKERR_SIRQ_E004MSG);
      }

      if (((Istatus & (IS_PA_TO_RX2 | IS_PA_TO_TX2)) != 0) &&
          pAC->GIni.GP[MAC_2].PState == SK_PRT_RESET) {
            /* MAC 2 was not initialized but Packet timeout occured */
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E005,
                  SKERR_SIRQ_E005MSG);
      }

      if ((Istatus & IS_PA_TO_RX1) != 0) {
            /* Means network is filling us up */
            SK_ERR_LOG(pAC, SK_ERRCL_HW | SK_ERRCL_INIT, SKERR_SIRQ_E002,
                  SKERR_SIRQ_E002MSG);
            SK_OUT16(IoC, B3_PA_CTRL, PA_CLR_TO_RX1);
      }

      if ((Istatus & IS_PA_TO_RX2) != 0) {
            /* Means network is filling us up */
            SK_ERR_LOG(pAC, SK_ERRCL_HW | SK_ERRCL_INIT, SKERR_SIRQ_E003,
                  SKERR_SIRQ_E003MSG);
            SK_OUT16(IoC, B3_PA_CTRL, PA_CLR_TO_RX2);
      }

      if ((Istatus & IS_PA_TO_TX1) != 0) {
            
            pPrt = &pAC->GIni.GP[0];

            /* May be a normal situation in a server with a slow network */
            SK_OUT16(IoC, B3_PA_CTRL, PA_CLR_TO_TX1);

#ifdef GENESIS
            if (pAC->GIni.GIGenesis) {
                  /*
                   * workaround: if in half duplex mode, check for Tx hangup.
                   * Read number of TX'ed bytes, wait for 10 ms, then compare
                   * the number with current value. If nothing changed, we assume
                   * that Tx is hanging and do a FIFO flush (see event routine).
                   */
                  if ((pPrt->PLinkModeStatus == SK_LMODE_STAT_HALF ||
                        pPrt->PLinkModeStatus == SK_LMODE_STAT_AUTOHALF) &&
                        !pPrt->HalfDupTimerActive) {
                        /*
                         * many more pack. arb. timeouts may come in between,
                         * we ignore those
                         */
                        pPrt->HalfDupTimerActive = SK_TRUE;
                        /* Snap statistic counters */
                        (void)SkXmUpdateStats(pAC, IoC, 0);

                        (void)SkXmMacStatistic(pAC, IoC, 0, XM_TXO_OK_HI, &RegVal32);

                        pPrt->LastOctets = (SK_U64)RegVal32 << 32;
                        
                        (void)SkXmMacStatistic(pAC, IoC, 0, XM_TXO_OK_LO, &RegVal32);

                        pPrt->LastOctets += RegVal32;
                        
                        Para.Para32[0] = 0;
                        SkTimerStart(pAC, IoC, &pPrt->HalfDupChkTimer, SK_HALFDUP_CHK_TIME,
                              SKGE_HWAC, SK_HWEV_HALFDUP_CHK, Para);
                  }
            }
#endif /* GENESIS */
      }

      if ((Istatus & IS_PA_TO_TX2) != 0) {
            
            pPrt = &pAC->GIni.GP[1];

            /* May be a normal situation in a server with a slow network */
            SK_OUT16(IoC, B3_PA_CTRL, PA_CLR_TO_TX2);

#ifdef GENESIS
            if (pAC->GIni.GIGenesis) {
                  /* workaround: see above */
                  if ((pPrt->PLinkModeStatus == SK_LMODE_STAT_HALF ||
                         pPrt->PLinkModeStatus == SK_LMODE_STAT_AUTOHALF) &&
                        !pPrt->HalfDupTimerActive) {
                        pPrt->HalfDupTimerActive = SK_TRUE;
                        /* Snap statistic counters */
                        (void)SkXmUpdateStats(pAC, IoC, 1);

                        (void)SkXmMacStatistic(pAC, IoC, 1, XM_TXO_OK_HI, &RegVal32);

                        pPrt->LastOctets = (SK_U64)RegVal32 << 32;
                        
                        (void)SkXmMacStatistic(pAC, IoC, 1, XM_TXO_OK_LO, &RegVal32);

                        pPrt->LastOctets += RegVal32;
                        
                        Para.Para32[0] = 1;
                        SkTimerStart(pAC, IoC, &pPrt->HalfDupChkTimer, SK_HALFDUP_CHK_TIME,
                              SKGE_HWAC, SK_HWEV_HALFDUP_CHK, Para);
                  }
            }
#endif /* GENESIS */
      }

      /* Check interrupts of the particular queues */
      if ((Istatus & IS_R1_C) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_R1_CSR, CSR_IRQ_CL_C);
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E006,
                  SKERR_SIRQ_E006MSG);
            Para.Para64 = MAC_1;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            Para.Para32[0] = MAC_1;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

      if ((Istatus & IS_R2_C) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_R2_CSR, CSR_IRQ_CL_C);
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E007,
                  SKERR_SIRQ_E007MSG);
            Para.Para64 = MAC_2;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            Para.Para32[0] = MAC_2;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

      if ((Istatus & IS_XS1_C) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_XS1_CSR, CSR_IRQ_CL_C);
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E008,
                  SKERR_SIRQ_E008MSG);
            Para.Para64 = MAC_1;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            Para.Para32[0] = MAC_1;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

      if ((Istatus & IS_XA1_C) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_XA1_CSR, CSR_IRQ_CL_C);
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E009,
                  SKERR_SIRQ_E009MSG);
            Para.Para64 = MAC_1;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            Para.Para32[0] = MAC_1;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

      if ((Istatus & IS_XS2_C) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_XS2_CSR, CSR_IRQ_CL_C);
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E010,
                  SKERR_SIRQ_E010MSG);
            Para.Para64 = MAC_2;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            Para.Para32[0] = MAC_2;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

      if ((Istatus & IS_XA2_C) != 0) {
            /* Clear IRQ */
            SK_OUT32(IoC, B0_XA2_CSR, CSR_IRQ_CL_C);
            SK_ERR_LOG(pAC, SK_ERRCL_SW | SK_ERRCL_INIT, SKERR_SIRQ_E011,
                  SKERR_SIRQ_E011MSG);
            Para.Para64 = MAC_2;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_FAIL, Para);
            Para.Para32[0] = MAC_2;
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

      /* External reg interrupt */
      if ((Istatus & IS_EXT_REG) != 0) {
            /* Test IRQs from PHY */
            for (i = 0; i < pAC->GIni.GIMacsFound; i++) {
                  
                  pPrt = &pAC->GIni.GP[i];
                  
                  if (pPrt->PState == SK_PRT_RESET) {
                        continue;
                  }
                  
#ifdef GENESIS
                  if (pAC->GIni.GIGenesis) {
                        
                        switch (pPrt->PhyType) {
                        
                        case SK_PHY_XMAC:
                              break;
                        
                        case SK_PHY_BCOM:
                              SkXmPhyRead(pAC, IoC, i, PHY_BCOM_INT_STAT, &PhyInt);
      
                              if ((PhyInt & ~PHY_B_DEF_MSK) != 0) {
                                    SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                                          ("Port %d Bcom Int: 0x%04X\n",
                                          i, PhyInt));
                                    SkPhyIsrBcom(pAC, IoC, i, PhyInt);
                              }
                              break;
#ifdef OTHER_PHY
                        case SK_PHY_LONE:
                              SkXmPhyRead(pAC, IoC, i, PHY_LONE_INT_STAT, &PhyInt);
                              
                              if ((PhyInt & PHY_L_DEF_MSK) != 0) {
                                    SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                                          ("Port %d Lone Int: %x\n",
                                          i, PhyInt));
                                    SkPhyIsrLone(pAC, IoC, i, PhyInt);
                              }
                              break;
#endif /* OTHER_PHY */
                        }
                  }
#endif /* GENESIS */
      
#ifdef YUKON
                  if (pAC->GIni.GIYukon) {
                        /* Read PHY Interrupt Status */
                        SkGmPhyRead(pAC, IoC, i, PHY_MARV_INT_STAT, &PhyInt);

                        if ((PhyInt & PHY_M_DEF_MSK) != 0) {
                              SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                                    ("Port %d Marv Int: 0x%04X\n",
                                    i, PhyInt));
                              SkPhyIsrGmac(pAC, IoC, i, PhyInt);
                        }
                  }
#endif /* YUKON */
            }
      }

      /* I2C Ready interrupt */
      if ((Istatus & IS_I2C_READY) != 0) {
#ifdef SK_SLIM
        SK_OUT32(IoC, B2_I2C_IRQ, I2C_CLR_IRQ);
#else       
            SkI2cIsr(pAC, IoC);
#endif            
      }

      /* SW forced interrupt */
      if ((Istatus & IS_IRQ_SW) != 0) {
            /* clear the software IRQ */
            SK_OUT8(IoC, B0_CTST, CS_CL_SW_IRQ);
      }

      if ((Istatus & IS_LNK_SYNC_M1) != 0) {
            /*
             * We do NOT need the Link Sync interrupt, because it shows
             * us only a link going down.
             */
            /* clear interrupt */
            SK_OUT8(IoC, MR_ADDR(MAC_1, LNK_SYNC_CTRL), LED_CLR_IRQ);
      }

      /* Check MAC after link sync counter */
      if ((Istatus & IS_MAC1) != 0) {
            /* IRQ from MAC 1 */
            SkMacIrq(pAC, IoC, MAC_1);
      }

      if ((Istatus & IS_LNK_SYNC_M2) != 0) {
            /*
             * We do NOT need the Link Sync interrupt, because it shows
             * us only a link going down.
             */
            /* clear interrupt */
            SK_OUT8(IoC, MR_ADDR(MAC_2, LNK_SYNC_CTRL), LED_CLR_IRQ);
      }

      /* Check MAC after link sync counter */
      if ((Istatus & IS_MAC2) != 0) {
            /* IRQ from MAC 2 */
            SkMacIrq(pAC, IoC, MAC_2);
      }

      /* Timer interrupt (served last) */
      if ((Istatus & IS_TIMINT) != 0) {
            /* check for HW Errors */
            if (((Istatus & IS_HW_ERR) & ~pAC->GIni.GIValIrqMask) != 0) {
                  /* read the HW Error Interrupt source */
                  SK_IN32(IoC, B0_HWE_ISRC, &RegVal32);

                  SkGeHwErr(pAC, IoC, RegVal32);
            }

            SkHwtIsr(pAC, IoC);
      }

}     /* SkGeSirqIsr */


#ifdef GENESIS
/******************************************************************************
 *
 * SkGePortCheckShorts() - Implementing XMAC Workaround Errata # 2
 *
 * return:
 *    0     o.k. nothing needed
 *    1     Restart needed on this port
 */
static int SkGePortCheckShorts(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* IO Context */
int         Port)       /* Which port should be checked */
{
      SK_U32            Shorts;                 /* Short Event Counter */
      SK_U32            CheckShorts;      /* Check value for Short Event Counter */
      SK_U64            RxCts;                  /* Rx Counter (packets on network) */
      SK_U32            RxTmp;                  /* Rx temp. Counter */
      SK_U32            FcsErrCts;        /* FCS Error Counter */
      SK_GEPORT   *pPrt;                  /* GIni Port struct pointer */
      int               Rtv;              /* Return value */
      int               i;

      pPrt = &pAC->GIni.GP[Port];

      /* Default: no action */
      Rtv = SK_HW_PS_NONE;

      (void)SkXmUpdateStats(pAC, IoC, Port);

      /* Extra precaution: check for short Event counter */
      (void)SkXmMacStatistic(pAC, IoC, Port, XM_RXE_SHT_ERR, &Shorts);

      /*
       * Read Rx counters (packets seen on the network and not necessarily
       * really received.
       */
      RxCts = 0;

      for (i = 0; i < sizeof(SkGeRxRegs)/sizeof(SkGeRxRegs[0]); i++) {
            
            (void)SkXmMacStatistic(pAC, IoC, Port, SkGeRxRegs[i], &RxTmp);
            
            RxCts += (SK_U64)RxTmp;
      }

      /* On default: check shorts against zero */
      CheckShorts = 0;

      /* Extra precaution on active links */
      if (pPrt->PHWLinkUp) {
            /* Reset Link Restart counter */
            pPrt->PLinkResCt = 0;
            pPrt->PAutoNegTOCt = 0;

            /* If link is up check for 2 */
            CheckShorts = 2;

            (void)SkXmMacStatistic(pAC, IoC, Port, XM_RXF_FCS_ERR, &FcsErrCts);
            
            if (pPrt->PLinkModeConf == SK_LMODE_AUTOSENSE &&
                pPrt->PLipaAutoNeg == SK_LIPA_UNKNOWN &&
                (pPrt->PLinkMode == SK_LMODE_HALF ||
                   pPrt->PLinkMode == SK_LMODE_FULL)) {
                  /*
                   * This is autosensing and we are in the fallback
                   * manual full/half duplex mode.
                   */
                  if (RxCts == pPrt->PPrevRx) {
                        /* Nothing received, restart link */
                        pPrt->PPrevFcs = FcsErrCts;
                        pPrt->PPrevShorts = Shorts;
                        
                        return(SK_HW_PS_RESTART);
                  }
                  else {
                        pPrt->PLipaAutoNeg = SK_LIPA_MANUAL;
                  }
            }

            if (((RxCts - pPrt->PPrevRx) > pPrt->PRxLim) ||
                (!(FcsErrCts - pPrt->PPrevFcs))) {
                  /*
                   * Note: The compare with zero above has to be done the way shown,
                   * otherwise the Linux driver will have a problem.
                   */
                  /*
                   * We received a bunch of frames or no CRC error occured on the
                   * network -> ok.
                   */
                  pPrt->PPrevRx = RxCts;
                  pPrt->PPrevFcs = FcsErrCts;
                  pPrt->PPrevShorts = Shorts;

                  return(SK_HW_PS_NONE);
            }

            pPrt->PPrevFcs = FcsErrCts;
      }


      if ((Shorts - pPrt->PPrevShorts) > CheckShorts) {
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                  ("Short Event Count Restart Port %d \n", Port));
            Rtv = SK_HW_PS_RESTART;
      }

      pPrt->PPrevShorts = Shorts;
      pPrt->PPrevRx = RxCts;

      return(Rtv);
}     /* SkGePortCheckShorts */
#endif /* GENESIS */


/******************************************************************************
 *
 * SkGePortCheckUp() - Check if the link is up
 *
 * return:
 *    0     o.k. nothing needed
 *    1     Restart needed on this port
 *    2     Link came up
 */
static int SkGePortCheckUp(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* IO Context */
int         Port)       /* Which port should be checked */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      SK_BOOL           AutoNeg;    /* Is Auto-negotiation used ? */
      int               Rtv;        /* Return value */

      Rtv = SK_HW_PS_NONE;
      
      pPrt = &pAC->GIni.GP[Port];

      if (pPrt->PLinkMode == SK_LMODE_HALF || pPrt->PLinkMode == SK_LMODE_FULL) {
            AutoNeg = SK_FALSE;
      }
      else {
            AutoNeg = SK_TRUE;
      }

#ifdef GENESIS
      if (pAC->GIni.GIGenesis) {

            switch (pPrt->PhyType) {
            
            case SK_PHY_XMAC:
                  Rtv = SkGePortCheckUpXmac(pAC, IoC, Port, AutoNeg);
                  break;
            case SK_PHY_BCOM:
                  Rtv = SkGePortCheckUpBcom(pAC, IoC, Port, AutoNeg);
                  break;
#ifdef OTHER_PHY
            case SK_PHY_LONE:
                  Rtv = SkGePortCheckUpLone(pAC, IoC, Port, AutoNeg);
                  break;
            case SK_PHY_NAT:
                  Rtv = SkGePortCheckUpNat(pAC, IoC, Port, AutoNeg);
                  break;
#endif /* OTHER_PHY */
            }
      }
#endif /* GENESIS */
      
#ifdef YUKON
      if (pAC->GIni.GIYukon) {
            
            Rtv = SkGePortCheckUpGmac(pAC, IoC, Port, AutoNeg);
      }
#endif /* YUKON */

      return(Rtv);      
}     /* SkGePortCheckUp */


#ifdef GENESIS
/******************************************************************************
 *
 * SkGePortCheckUpXmac() - Implementing of the Workaround Errata # 2
 *
 * return:
 *    0     o.k. nothing needed
 *    1     Restart needed on this port
 *    2     Link came up
 */
static int SkGePortCheckUpXmac(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* IO Context */
int         Port,       /* Which port should be checked */
SK_BOOL     AutoNeg)    /* Is Auto-negotiation used ? */
{
      SK_U32            Shorts;           /* Short Event Counter */
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      int               Done;
      SK_U32            GpReg;            /* General Purpose register value */
      SK_U16            Isrc;       /* Interrupt source register */
      SK_U16            IsrcSum;    /* Interrupt source register sum */
      SK_U16            LpAb;       /* Link Partner Ability */
      SK_U16            ResAb;            /* Resolved Ability */
      SK_U16            ExtStat;    /* Extended Status Register */
      SK_U8       NextMode;   /* Next AutoSensing Mode */

      pPrt = &pAC->GIni.GP[Port];

      if (pPrt->PHWLinkUp) {
            if (pPrt->PhyType != SK_PHY_XMAC) {
                  return(SK_HW_PS_NONE);
            }
            else {
                  return(SkGePortCheckShorts(pAC, IoC, Port));
            }
      }

      IsrcSum = pPrt->PIsave;
      pPrt->PIsave = 0;

      /* Now wait for each port's link */
      if (pPrt->PLinkBroken) {
            /* Link was broken */
            XM_IN32(IoC, Port, XM_GP_PORT, &GpReg);

            if ((GpReg & XM_GP_INP_ASS) == 0) {
                  /* The Link is in sync */
                  XM_IN16(IoC, Port, XM_ISRC, &Isrc);
                  IsrcSum |= Isrc;
                  SkXmAutoNegLipaXmac(pAC, IoC, Port, IsrcSum);
                  
                  if ((Isrc & XM_IS_INP_ASS) == 0) {
                        /* It has been in sync since last time */
                        /* Restart the PORT */
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                              ("Link in sync Restart Port %d\n", Port));

                        (void)SkXmUpdateStats(pAC, IoC, Port);

                        /* We now need to reinitialize the PrevShorts counter */
                        (void)SkXmMacStatistic(pAC, IoC, Port, XM_RXE_SHT_ERR, &Shorts);
                        pPrt->PPrevShorts = Shorts;

                        pPrt->PLinkBroken = SK_FALSE;

                        /*
                         * Link Restart Workaround:
                         *  it may be possible that the other Link side
                         *  restarts its link as well an we detect
                         *  another LinkBroken. To prevent this
                         *  happening we check for a maximum number
                         *  of consecutive restart. If those happens,
                         *  we do NOT restart the active link and
                         *  check whether the link is now o.k.
                         */
                        pPrt->PLinkResCt++;
                        
                        pPrt->PAutoNegTimeOut = 0;

                        if (pPrt->PLinkResCt < SK_MAX_LRESTART) {
                              return(SK_HW_PS_RESTART);
                        }

                        pPrt->PLinkResCt = 0;
                        
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                              ("Do NOT restart on Port %d %x %x\n", Port, Isrc, IsrcSum));
                  }
                  else {
                        pPrt->PIsave = (SK_U16)(IsrcSum & XM_IS_AND);
                        
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                              ("Save Sync/nosync Port %d %x %x\n", Port, Isrc, IsrcSum));

                        /* Do nothing more if link is broken */
                        return(SK_HW_PS_NONE);
                  }
            }
            else {
                  /* Do nothing more if link is broken */
                  return(SK_HW_PS_NONE);
            }

      }
      else {
            /* Link was not broken, check if it is */
            XM_IN16(IoC, Port, XM_ISRC, &Isrc);
            IsrcSum |= Isrc;
            if ((Isrc & XM_IS_INP_ASS) != 0) {
                  XM_IN16(IoC, Port, XM_ISRC, &Isrc);
                  IsrcSum |= Isrc;
                  if ((Isrc & XM_IS_INP_ASS) != 0) {
                        XM_IN16(IoC, Port, XM_ISRC, &Isrc);
                        IsrcSum |= Isrc;
                        if ((Isrc & XM_IS_INP_ASS) != 0) {
                              pPrt->PLinkBroken = SK_TRUE;
                              /* Re-Init Link partner Autoneg flag */
                              pPrt->PLipaAutoNeg = SK_LIPA_UNKNOWN;
                              SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                                    ("Link broken Port %d\n", Port));

                              /* Cable removed-> reinit sense mode */
                              SkHWInitDefSense(pAC, IoC, Port);

                              return(SK_HW_PS_RESTART);
                        }
                  }
            }
            else {
                  SkXmAutoNegLipaXmac(pAC, IoC, Port, Isrc);
                  
                  if (SkGePortCheckShorts(pAC, IoC, Port) == SK_HW_PS_RESTART) {
                        return(SK_HW_PS_RESTART);
                  }
            }
      }

      /*
       * here we usually can check whether the link is in sync and
       * auto-negotiation is done.
       */
      XM_IN32(IoC, Port, XM_GP_PORT, &GpReg);
      XM_IN16(IoC, Port, XM_ISRC, &Isrc);
      IsrcSum |= Isrc;

      SkXmAutoNegLipaXmac(pAC, IoC, Port, IsrcSum);
      
      if ((GpReg & XM_GP_INP_ASS) != 0 || (IsrcSum & XM_IS_INP_ASS) != 0) {
            if ((GpReg & XM_GP_INP_ASS) == 0) {
                  /* Save Auto-negotiation Done interrupt only if link is in sync */
                  pPrt->PIsave = (SK_U16)(IsrcSum & XM_IS_AND);
            }
#ifdef DEBUG
            if ((pPrt->PIsave & XM_IS_AND) != 0) {
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                        ("AutoNeg done rescheduled Port %d\n", Port));
            }
#endif /* DEBUG */
            return(SK_HW_PS_NONE);
      }

      if (AutoNeg) {
            if ((IsrcSum & XM_IS_AND) != 0) {
                  SkHWLinkUp(pAC, IoC, Port);
                  Done = SkMacAutoNegDone(pAC, IoC, Port);
                  if (Done != SK_AND_OK) {
                        /* Get PHY parameters, for debugging only */
                        SkXmPhyRead(pAC, IoC, Port, PHY_XMAC_AUNE_LP, &LpAb);
                        SkXmPhyRead(pAC, IoC, Port, PHY_XMAC_RES_ABI, &ResAb);
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                              ("AutoNeg FAIL Port %d (LpAb %x, ResAb %x)\n",
                               Port, LpAb, ResAb));
                              
                        /* Try next possible mode */
                        NextMode = SkHWSenseGetNext(pAC, IoC, Port);
                        SkHWLinkDown(pAC, IoC, Port);
                        if (Done == SK_AND_DUP_CAP) {
                              /* GoTo next mode */
                              SkHWSenseSetNext(pAC, IoC, Port, NextMode);
                        }

                        return(SK_HW_PS_RESTART);
                  }
                  /*
                   * Dummy Read extended status to prevent extra link down/ups
                   * (clear Page Received bit if set)
                   */
                  SkXmPhyRead(pAC, IoC, Port, PHY_XMAC_AUNE_EXP, &ExtStat);
                  
                  return(SK_HW_PS_LINK);
            }
            
            /* AutoNeg not done, but HW link is up. Check for timeouts */
            pPrt->PAutoNegTimeOut++;
            if (pPrt->PAutoNegTimeOut >= SK_AND_MAX_TO) {
                  /* Increase the Timeout counter */
                  pPrt->PAutoNegTOCt++;

                  /* Timeout occured */
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                        ("AutoNeg timeout Port %d\n", Port));
                  if (pPrt->PLinkModeConf == SK_LMODE_AUTOSENSE &&
                        pPrt->PLipaAutoNeg != SK_LIPA_AUTO) {
                        /* Set Link manually up */
                        SkHWSenseSetNext(pAC, IoC, Port, SK_LMODE_FULL);
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                              ("Set manual full duplex Port %d\n", Port));
                  }

                  if (pPrt->PLinkModeConf == SK_LMODE_AUTOSENSE &&
                        pPrt->PLipaAutoNeg == SK_LIPA_AUTO &&
                        pPrt->PAutoNegTOCt >= SK_MAX_ANEG_TO) {
                        /*
                         * This is rather complicated.
                         * we need to check here whether the LIPA_AUTO
                         * we saw before is false alert. We saw at one
                         * switch ( SR8800) that on boot time it sends
                         * just one auto-neg packet and does no further
                         * auto-negotiation.
                         * Solution: we restart the autosensing after
                         * a few timeouts.
                         */
                        pPrt->PAutoNegTOCt = 0;
                        pPrt->PLipaAutoNeg = SK_LIPA_UNKNOWN;
                        SkHWInitDefSense(pAC, IoC, Port);
                  }

                  /* Do the restart */
                  return(SK_HW_PS_RESTART);
            }
      }
      else {
            /* Link is up and we don't need more */
#ifdef DEBUG
            if (pPrt->PLipaAutoNeg == SK_LIPA_AUTO) {
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                        ("ERROR: Lipa auto detected on port %d\n", Port));
            }
#endif /* DEBUG */
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                  ("Link sync(GP), Port %d\n", Port));
            SkHWLinkUp(pAC, IoC, Port);
            
            /*
             * Link sync (GP) and so assume a good connection. But if not received
             * a bunch of frames received in a time slot (maybe broken tx cable)
             * the port is restart.
             */
            return(SK_HW_PS_LINK);
      }

      return(SK_HW_PS_NONE);
}     /* SkGePortCheckUpXmac */


/******************************************************************************
 *
 * SkGePortCheckUpBcom() - Check if the link is up on Bcom PHY
 *
 * return:
 *    0     o.k. nothing needed
 *    1     Restart needed on this port
 *    2     Link came up
 */
static int SkGePortCheckUpBcom(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* IO Context */
int         Port,       /* Which port should be checked */
SK_BOOL     AutoNeg)    /* Is Auto-negotiation used ? */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      int               Done;
      SK_U16            Isrc;       /* Interrupt source register */
      SK_U16            PhyStat;    /* Phy Status Register */
      SK_U16            ResAb;            /* Master/Slave resolution */
      SK_U16            Ctrl;       /* Broadcom control flags */
#ifdef DEBUG
      SK_U16            LpAb;
      SK_U16            ExtStat;
#endif /* DEBUG */

      pPrt = &pAC->GIni.GP[Port];

      /* Check for No HCD Link events (#10523) */
      SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_INT_STAT, &Isrc);

#ifdef xDEBUG
      if ((Isrc & ~(PHY_B_IS_HCT | PHY_B_IS_LCT)) ==
            (PHY_B_IS_SCR_S_ER | PHY_B_IS_RRS_CHANGE | PHY_B_IS_LRS_CHANGE)) {

            SK_U32      Stat1, Stat2, Stat3;

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_INT_MASK, &Stat1);
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "CheckUp1 - Stat: %x, Mask: %x",
                  (void *)Isrc,
                  (void *)Stat1);

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_CTRL, &Stat1);
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_STAT, &Stat2);
            Stat1 = Stat1 << 16 | Stat2;
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUNE_ADV, &Stat2);
            Stat3 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUNE_LP, &Stat3);
            Stat2 = Stat2 << 16 | Stat3;
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "Ctrl/Stat: %x, AN Adv/LP: %x",
                  (void *)Stat1,
                  (void *)Stat2);

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUNE_EXP, &Stat1);
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_EXT_STAT, &Stat2);
            Stat1 = Stat1 << 16 | Stat2;
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_1000T_CTRL, &Stat2);
            Stat3 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_1000T_STAT, &Stat3);
            Stat2 = Stat2 << 16 | Stat3;
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "AN Exp/IEEE Ext: %x, 1000T Ctrl/Stat: %x",
                  (void *)Stat1,
                  (void *)Stat2);

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_P_EXT_CTRL, &Stat1);
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_P_EXT_STAT, &Stat2);
            Stat1 = Stat1 << 16 | Stat2;
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUX_CTRL, &Stat2);
            Stat3 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUX_STAT, &Stat3);
            Stat2 = Stat2 << 16 | Stat3;
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "PHY Ext Ctrl/Stat: %x, Aux Ctrl/Stat: %x",
                  (void *)Stat1,
                  (void *)Stat2);
      }
#endif /* DEBUG */

      if ((Isrc & (PHY_B_IS_NO_HDCL /* | PHY_B_IS_NO_HDC */)) != 0) {
            /*
             * Workaround BCom Errata:
             *    enable and disable loopback mode if "NO HCD" occurs.
             */
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_CTRL, &Ctrl);
            SkXmPhyWrite(pAC, IoC, Port, PHY_BCOM_CTRL,
                  (SK_U16)(Ctrl | PHY_CT_LOOP));
            SkXmPhyWrite(pAC, IoC, Port, PHY_BCOM_CTRL,
                  (SK_U16)(Ctrl & ~PHY_CT_LOOP));
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("No HCD Link event, Port %d\n", Port));
#ifdef xDEBUG
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "No HCD link event, port %d.",
                  (void *)Port,
                  (void *)NULL);
#endif /* DEBUG */
      }

      /* Not obsolete: link status bit is latched to 0 and autoclearing! */
      SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_STAT, &PhyStat);

      if (pPrt->PHWLinkUp) {
            return(SK_HW_PS_NONE);
      }

#ifdef xDEBUG
      {
            SK_U32      Stat1, Stat2, Stat3;

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_INT_MASK, &Stat1);
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "CheckUp1a - Stat: %x, Mask: %x",
                  (void *)Isrc,
                  (void *)Stat1);

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_CTRL, &Stat1);
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_STAT, &PhyStat);
            Stat1 = Stat1 << 16 | PhyStat;
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUNE_ADV, &Stat2);
            Stat3 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUNE_LP, &Stat3);
            Stat2 = Stat2 << 16 | Stat3;
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "Ctrl/Stat: %x, AN Adv/LP: %x",
                  (void *)Stat1,
                  (void *)Stat2);

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUNE_EXP, &Stat1);
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_EXT_STAT, &Stat2);
            Stat1 = Stat1 << 16 | Stat2;
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_1000T_CTRL, &Stat2);
            Stat3 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_1000T_STAT, &ResAb);
            Stat2 = Stat2 << 16 | ResAb;
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "AN Exp/IEEE Ext: %x, 1000T Ctrl/Stat: %x",
                  (void *)Stat1,
                  (void *)Stat2);

            Stat1 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_P_EXT_CTRL, &Stat1);
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_P_EXT_STAT, &Stat2);
            Stat1 = Stat1 << 16 | Stat2;
            Stat2 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUX_CTRL, &Stat2);
            Stat3 = 0;
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUX_STAT, &Stat3);
            Stat2 = Stat2 << 16 | Stat3;
            CMSMPrintString(
                  pAC->pConfigTable,
                  MSG_TYPE_RUNTIME_INFO,
                  "PHY Ext Ctrl/Stat: %x, Aux Ctrl/Stat: %x",
                  (void *)Stat1,
                  (void *)Stat2);
      }
#endif /* DEBUG */

      /*
       * Here we usually can check whether the link is in sync and
       * auto-negotiation is done.
       */

      SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_STAT, &PhyStat);

      SkMacAutoNegLipaPhy(pAC, IoC, Port, PhyStat);
      
      SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
            ("CheckUp Port %d, PhyStat: 0x%04X\n", Port, PhyStat));

      SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_1000T_STAT, &ResAb);

      if ((ResAb & PHY_B_1000S_MSF) != 0) {
            /* Error */
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("Master/Slave Fault port %d\n", Port));
            
            pPrt->PAutoNegFail = SK_TRUE;
            pPrt->PMSStatus = SK_MS_STAT_FAULT;
            
            return(SK_HW_PS_RESTART);
      }

      if ((PhyStat & PHY_ST_LSYNC) == 0) {
            return(SK_HW_PS_NONE);
      }
      
      pPrt->PMSStatus = ((ResAb & PHY_B_1000S_MSR) != 0) ?
            SK_MS_STAT_MASTER : SK_MS_STAT_SLAVE;
      
      SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
            ("Port %d, ResAb: 0x%04X\n", Port, ResAb));

      if (AutoNeg) {
            if ((PhyStat & PHY_ST_AN_OVER) != 0) {
                  
                  SkHWLinkUp(pAC, IoC, Port);
                  
                  Done = SkMacAutoNegDone(pAC, IoC, Port);
                  
                  if (Done != SK_AND_OK) {
#ifdef DEBUG
                        /* Get PHY parameters, for debugging only */
                        SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_AUNE_LP, &LpAb);
                        SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_1000T_STAT, &ExtStat);
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                              ("AutoNeg FAIL Port %d (LpAb %x, 1000TStat %x)\n",
                              Port, LpAb, ExtStat));
#endif /* DEBUG */
                        return(SK_HW_PS_RESTART);
                  }
                  else {
#ifdef xDEBUG
                        /* Dummy read ISR to prevent extra link downs/ups */
                        SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_INT_STAT, &ExtStat);

                        if ((ExtStat & ~(PHY_B_IS_HCT | PHY_B_IS_LCT)) != 0) {
                              CMSMPrintString(
                                    pAC->pConfigTable,
                                    MSG_TYPE_RUNTIME_INFO,
                                    "CheckUp2 - Stat: %x",
                                    (void *)ExtStat,
                                    (void *)NULL);
                        }
#endif /* DEBUG */
                        return(SK_HW_PS_LINK);
                  }
            }
      }
      else {      /* !AutoNeg */
            /* Link is up and we don't need more. */
#ifdef DEBUG
            if (pPrt->PLipaAutoNeg == SK_LIPA_AUTO) {
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                        ("ERROR: Lipa auto detected on port %d\n", Port));
            }
#endif /* DEBUG */

#ifdef xDEBUG
            /* Dummy read ISR to prevent extra link downs/ups */
            SkXmPhyRead(pAC, IoC, Port, PHY_BCOM_INT_STAT, &ExtStat);

            if ((ExtStat & ~(PHY_B_IS_HCT | PHY_B_IS_LCT)) != 0) {
                  CMSMPrintString(
                        pAC->pConfigTable,
                        MSG_TYPE_RUNTIME_INFO,
                        "CheckUp3 - Stat: %x",
                        (void *)ExtStat,
                        (void *)NULL);
            }
#endif /* DEBUG */
            
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                  ("Link sync(GP), Port %d\n", Port));
            SkHWLinkUp(pAC, IoC, Port);
            
            return(SK_HW_PS_LINK);
      }

      return(SK_HW_PS_NONE);
}     /* SkGePortCheckUpBcom */
#endif /* GENESIS */


#ifdef YUKON
/******************************************************************************
 *
 * SkGePortCheckUpGmac() - Check if the link is up on Marvell PHY
 *
 * return:
 *    0     o.k. nothing needed
 *    1     Restart needed on this port
 *    2     Link came up
 */
static int SkGePortCheckUpGmac(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* IO Context */
int         Port,       /* Which port should be checked */
SK_BOOL     AutoNeg)    /* Is Auto-negotiation used ? */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      int               Done;
      SK_U16            PhyIsrc;    /* PHY Interrupt source */
      SK_U16            PhyStat;    /* PPY Status */
      SK_U16            PhySpecStat;/* PHY Specific Status */
      SK_U16            ResAb;            /* Master/Slave resolution */
      SK_EVPARA   Para;
#ifdef DEBUG
      SK_U16            Word;       /* I/O helper */
#endif /* DEBUG */

      pPrt = &pAC->GIni.GP[Port];

      if (pPrt->PHWLinkUp) {
            return(SK_HW_PS_NONE);
      }

      /* Read PHY Status */
      SkGmPhyRead(pAC, IoC, Port, PHY_MARV_STAT, &PhyStat);

      SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
            ("CheckUp Port %d, PhyStat: 0x%04X\n", Port, PhyStat));

      /* Read PHY Interrupt Status */
      SkGmPhyRead(pAC, IoC, Port, PHY_MARV_INT_STAT, &PhyIsrc);

      if ((PhyIsrc & PHY_M_IS_AN_COMPL) != 0) {
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("Auto-Negotiation Completed, PhyIsrc: 0x%04X\n", PhyIsrc));
      }

      if ((PhyIsrc & PHY_M_IS_LSP_CHANGE) != 0) {
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("Link Speed Changed, PhyIsrc: 0x%04X\n", PhyIsrc));
      }

      SkMacAutoNegLipaPhy(pAC, IoC, Port, PhyStat);
      
      SkGmPhyRead(pAC, IoC, Port, PHY_MARV_1000T_STAT, &ResAb);

      if ((ResAb & PHY_B_1000S_MSF) != 0) {
            /* Error */
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("Master/Slave Fault port %d\n", Port));
            
            pPrt->PAutoNegFail = SK_TRUE;
            pPrt->PMSStatus = SK_MS_STAT_FAULT;
            
            return(SK_HW_PS_RESTART);
      }

      /* Read PHY Specific Status */
      SkGmPhyRead(pAC, IoC, Port, PHY_MARV_PHY_STAT, &PhySpecStat);
      
      SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
            ("Phy1000BT: 0x%04X, PhySpecStat: 0x%04X\n", ResAb, PhySpecStat));

#ifdef DEBUG
      SkGmPhyRead(pAC, IoC, Port, PHY_MARV_AUNE_EXP, &Word);

      if ((PhyIsrc & PHY_M_IS_AN_PR) != 0 || (Word & PHY_ANE_RX_PG) != 0 ||
            (PhySpecStat & PHY_M_PS_PAGE_REC) != 0)  {
            /* Read PHY Next Page Link Partner */
            SkGmPhyRead(pAC, IoC, Port, PHY_MARV_NEPG_LP, &Word);

            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("Page Received, NextPage: 0x%04X\n", Word));
      }
#endif /* DEBUG */

      if ((PhySpecStat & PHY_M_PS_LINK_UP) == 0) {
            return(SK_HW_PS_NONE);
      }
      
      if ((PhySpecStat & PHY_M_PS_DOWNS_STAT) != 0 ||
            (PhyIsrc & PHY_M_IS_DOWNSH_DET) != 0) {
            /* Downshift detected */
            SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E025, SKERR_SIRQ_E025MSG);
            
            Para.Para64 = Port;
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_DOWNSHIFT_DET, Para);
            
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("Downshift detected, PhyIsrc: 0x%04X\n", PhyIsrc));
      }

      pPrt->PMSStatus = ((ResAb & PHY_B_1000S_MSR) != 0) ?
            SK_MS_STAT_MASTER : SK_MS_STAT_SLAVE;
      
      pPrt->PCableLen = (SK_U8)((PhySpecStat & PHY_M_PS_CABLE_MSK) >> 7);
      
      if (AutoNeg) {
            /* Auto-Negotiation Over ? */
            if ((PhyStat & PHY_ST_AN_OVER) != 0) {
                  
                  SkHWLinkUp(pAC, IoC, Port);
                  
                  Done = SkMacAutoNegDone(pAC, IoC, Port);
                  
                  if (Done != SK_AND_OK) {
                        return(SK_HW_PS_RESTART);
                  }
                  
                  return(SK_HW_PS_LINK);
            }
      }
      else {      /* !AutoNeg */
            /* Link is up and we don't need more */
#ifdef DEBUG
            if (pPrt->PLipaAutoNeg == SK_LIPA_AUTO) {
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                        ("ERROR: Lipa auto detected on port %d\n", Port));
            }
#endif /* DEBUG */

            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                  ("Link sync, Port %d\n", Port));
            SkHWLinkUp(pAC, IoC, Port);
            
            return(SK_HW_PS_LINK);
      }

      return(SK_HW_PS_NONE);
}     /* SkGePortCheckUpGmac */
#endif /* YUKON */


#ifdef OTHER_PHY
/******************************************************************************
 *
 * SkGePortCheckUpLone() - Check if the link is up on Level One PHY
 *
 * return:
 *    0     o.k. nothing needed
 *    1     Restart needed on this port
 *    2     Link came up
 */
static int SkGePortCheckUpLone(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* IO Context */
int         Port,       /* Which port should be checked */
SK_BOOL     AutoNeg)    /* Is Auto-negotiation used ? */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      int               Done;
      SK_U16            Isrc;       /* Interrupt source register */
      SK_U16            LpAb;       /* Link Partner Ability */
      SK_U16            ExtStat;    /* Extended Status Register */
      SK_U16            PhyStat;    /* Phy Status Register */
      SK_U16            StatSum;
      SK_U8       NextMode;   /* Next AutoSensing Mode */

      pPrt = &pAC->GIni.GP[Port];

      if (pPrt->PHWLinkUp) {
            return(SK_HW_PS_NONE);
      }

      StatSum = pPrt->PIsave;
      pPrt->PIsave = 0;

      /*
       * here we usually can check whether the link is in sync and
       * auto-negotiation is done.
       */
      SkXmPhyRead(pAC, IoC, Port, PHY_LONE_STAT, &PhyStat);
      StatSum |= PhyStat;

      SkMacAutoNegLipaPhy(pAC, IoC, Port, PhyStat);
      
      if ((PhyStat & PHY_ST_LSYNC) == 0) {
            /* Save Auto-negotiation Done bit */
            pPrt->PIsave = (SK_U16)(StatSum & PHY_ST_AN_OVER);
#ifdef DEBUG
            if ((pPrt->PIsave & PHY_ST_AN_OVER) != 0) {
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                        ("AutoNeg done rescheduled Port %d\n", Port));
            }
#endif /* DEBUG */
            return(SK_HW_PS_NONE);
      }

      if (AutoNeg) {
            if ((StatSum & PHY_ST_AN_OVER) != 0) {
                  SkHWLinkUp(pAC, IoC, Port);
                  Done = SkMacAutoNegDone(pAC, IoC, Port);
                  if (Done != SK_AND_OK) {
                        /* Get PHY parameters, for debugging only */
                        SkXmPhyRead(pAC, IoC, Port, PHY_LONE_AUNE_LP, &LpAb);
                        SkXmPhyRead(pAC, IoC, Port, PHY_LONE_1000T_STAT, &ExtStat);
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                              ("AutoNeg FAIL Port %d (LpAb %x, 1000TStat %x)\n",
                               Port, LpAb, ExtStat));
                              
                        /* Try next possible mode */
                        NextMode = SkHWSenseGetNext(pAC, IoC, Port);
                        SkHWLinkDown(pAC, IoC, Port);
                        if (Done == SK_AND_DUP_CAP) {
                              /* GoTo next mode */
                              SkHWSenseSetNext(pAC, IoC, Port, NextMode);
                        }

                        return(SK_HW_PS_RESTART);

                  }
                  else {
                        /*
                         * Dummy Read interrupt status to prevent
                         * extra link down/ups
                         */
                        SkXmPhyRead(pAC, IoC, Port, PHY_LONE_INT_STAT, &ExtStat);
                        return(SK_HW_PS_LINK);
                  }
            }
            
            /* AutoNeg not done, but HW link is up. Check for timeouts */
            pPrt->PAutoNegTimeOut++;
            if (pPrt->PAutoNegTimeOut >= SK_AND_MAX_TO) {
                  /* Timeout occured */
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                        ("AutoNeg timeout Port %d\n", Port));
                  if (pPrt->PLinkModeConf == SK_LMODE_AUTOSENSE &&
                        pPrt->PLipaAutoNeg != SK_LIPA_AUTO) {
                        /* Set Link manually up */
                        SkHWSenseSetNext(pAC, IoC, Port, SK_LMODE_FULL);
                        SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                              ("Set manual full duplex Port %d\n", Port));
                  }

                  /* Do the restart */
                  return(SK_HW_PS_RESTART);
            }
      }
      else {
            /* Link is up and we don't need more */
#ifdef DEBUG
            if (pPrt->PLipaAutoNeg == SK_LIPA_AUTO) {
                  SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                        ("ERROR: Lipa auto detected on port %d\n", Port));
            }
#endif /* DEBUG */

            /*
             * Dummy Read interrupt status to prevent
             * extra link down/ups
             */
            SkXmPhyRead(pAC, IoC, Port, PHY_LONE_INT_STAT, &ExtStat);
            
            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_IRQ,
                  ("Link sync(GP), Port %d\n", Port));
            SkHWLinkUp(pAC, IoC, Port);
            
            return(SK_HW_PS_LINK);
      }

      return(SK_HW_PS_NONE);
}     /* SkGePortCheckUpLone */


/******************************************************************************
 *
 * SkGePortCheckUpNat() - Check if the link is up on National PHY
 *
 * return:
 *    0     o.k. nothing needed
 *    1     Restart needed on this port
 *    2     Link came up
 */
static int SkGePortCheckUpNat(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* IO Context */
int         Port,       /* Which port should be checked */
SK_BOOL     AutoNeg)    /* Is Auto-negotiation used ? */
{
      /* todo: National */
      return(SK_HW_PS_NONE);
}     /* SkGePortCheckUpNat */
#endif /* OTHER_PHY */


/******************************************************************************
 *
 *    SkGeSirqEvent() - Event Service Routine
 *
 * Description:
 *
 * Notes:
 */
int   SkGeSirqEvent(
SK_AC       *pAC,       /* Adapter Context */
SK_IOC            IoC,        /* Io Context */
SK_U32            Event,            /* Module specific Event */
SK_EVPARA   Para)       /* Event specific Parameter */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      SK_U32            Port;
      SK_U32            Val32;
      int               PortStat;
      SK_U8       Val8;
#ifdef GENESIS
      SK_U64            Octets;
#endif /* GENESIS */

      Port = Para.Para32[0];
      pPrt = &pAC->GIni.GP[Port];

      switch (Event) {
      case SK_HWEV_WATIM:
            if (pPrt->PState == SK_PRT_RESET) {
            
                  PortStat = SK_HW_PS_NONE;
            }
            else {
                  /* Check whether port came up */
                  PortStat = SkGePortCheckUp(pAC, IoC, (int)Port);
            }

            switch (PortStat) {
            case SK_HW_PS_RESTART:
                  if (pPrt->PHWLinkUp) {
                        /* Set Link to down */
                        SkHWLinkDown(pAC, IoC, (int)Port);

                        /*
                         * Signal directly to RLMT to ensure correct
                         * sequence of SWITCH and RESET event.
                         */
                        SkRlmtEvent(pAC, IoC, SK_RLMT_LINK_DOWN, Para);
                  }

                  /* Restart needed */
                  SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_RESET, Para);
                  break;

            case SK_HW_PS_LINK:
                  /* Signal to RLMT */
                  SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_UP, Para);
                  break;
            }
            
            /* Start again the check Timer */
            if (pPrt->PHWLinkUp) {
                  Val32 = SK_WA_ACT_TIME;
            }
            else {
                  Val32 = SK_WA_INA_TIME;
            }

            /* Todo: still needed for non-XMAC PHYs??? */
            /* Start workaround Errata #2 timer */
            SkTimerStart(pAC, IoC, &pPrt->PWaTimer, Val32,
                  SKGE_HWAC, SK_HWEV_WATIM, Para);
            break;

      case SK_HWEV_PORT_START:
            if (pPrt->PHWLinkUp) {
                  /*
                   * Signal directly to RLMT to ensure correct
                   * sequence of SWITCH and RESET event.
                   */
                  SkRlmtEvent(pAC, IoC, SK_RLMT_LINK_DOWN, Para);
            }

            SkHWLinkDown(pAC, IoC, (int)Port);

            /* Schedule Port RESET */
            SkEventQueue(pAC, SKGE_DRV, SK_DRV_PORT_RESET, Para);

            /* Start workaround Errata #2 timer */
            SkTimerStart(pAC, IoC, &pPrt->PWaTimer, SK_WA_INA_TIME,
                  SKGE_HWAC, SK_HWEV_WATIM, Para);
            break;

      case SK_HWEV_PORT_STOP:
            if (pPrt->PHWLinkUp) {
                  /*
                   * Signal directly to RLMT to ensure correct
                   * sequence of SWITCH and RESET event.
                   */
                  SkRlmtEvent(pAC, IoC, SK_RLMT_LINK_DOWN, Para);
            }

            /* Stop Workaround Timer */
            SkTimerStop(pAC, IoC, &pPrt->PWaTimer);

            SkHWLinkDown(pAC, IoC, (int)Port);
            break;

      case SK_HWEV_UPDATE_STAT:
            /* We do NOT need to update any statistics */
            break;

      case SK_HWEV_CLEAR_STAT:
            /* We do NOT need to clear any statistics */
            for (Port = 0; Port < (SK_U32)pAC->GIni.GIMacsFound; Port++) {
                  pPrt->PPrevRx = 0;
                  pPrt->PPrevFcs = 0;
                  pPrt->PPrevShorts = 0;
            }
            break;

      case SK_HWEV_SET_LMODE:
            Val8 = (SK_U8)Para.Para32[1];
            if (pPrt->PLinkModeConf != Val8) {
                  /* Set New link mode */
                  pPrt->PLinkModeConf = Val8;

                  /* Restart Port */
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_STOP, Para);
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_START, Para);
            }
            break;

      case SK_HWEV_SET_FLOWMODE:
            Val8 = (SK_U8)Para.Para32[1];
            if (pPrt->PFlowCtrlMode != Val8) {
                  /* Set New Flow Control mode */
                  pPrt->PFlowCtrlMode = Val8;

                  /* Restart Port */
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_STOP, Para);
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_START, Para);
            }
            break;

      case SK_HWEV_SET_ROLE:
            /* not possible for fiber */
            if (!pAC->GIni.GICopperType) {
                  break;
            }
            Val8 = (SK_U8)Para.Para32[1];
            if (pPrt->PMSMode != Val8) {
                  /* Set New Role (Master/Slave) mode */
                  pPrt->PMSMode = Val8;

                  /* Restart Port */
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_STOP, Para);
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_START, Para);
            }
            break;

      case SK_HWEV_SET_SPEED:
            if (pPrt->PhyType != SK_PHY_MARV_COPPER) {
                  break;
            }
            Val8 = (SK_U8)Para.Para32[1];
            if (pPrt->PLinkSpeed != Val8) {
                  /* Set New Speed parameter */
                  pPrt->PLinkSpeed = Val8;

                  /* Restart Port */
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_STOP, Para);
                  SkEventQueue(pAC, SKGE_HWAC, SK_HWEV_PORT_START, Para);
            }
            break;

#ifdef GENESIS
      case SK_HWEV_HALFDUP_CHK:
            if (pAC->GIni.GIGenesis) {
                  /*
                   * half duplex hangup workaround.
                   * See packet arbiter timeout interrupt for description
                   */
                  pPrt->HalfDupTimerActive = SK_FALSE;
                  if (pPrt->PLinkModeStatus == SK_LMODE_STAT_HALF ||
                        pPrt->PLinkModeStatus == SK_LMODE_STAT_AUTOHALF) {
                        /* Snap statistic counters */
                        (void)SkXmUpdateStats(pAC, IoC, Port);

                        (void)SkXmMacStatistic(pAC, IoC, Port, XM_TXO_OK_HI, &Val32);

                        Octets = (SK_U64)Val32 << 32;
                        
                        (void)SkXmMacStatistic(pAC, IoC, Port, XM_TXO_OK_LO, &Val32);

                        Octets += Val32;
                        
                        if (pPrt->LastOctets == Octets) {
                              /* Tx hanging, a FIFO flush restarts it */
                              SkMacFlushTxFifo(pAC, IoC, Port);
                        }
                  }
            }
            break;
#endif /* GENESIS */
      
      default:
            SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_SIRQ_E001, SKERR_SIRQ_E001MSG);
            break;
      }

      return(0);
}     /* SkGeSirqEvent */


#ifdef GENESIS
/******************************************************************************
 *
 *    SkPhyIsrBcom() - PHY interrupt service routine
 *
 * Description: handles all interrupts from BCom PHY
 *
 * Returns: N/A
 */
static void SkPhyIsrBcom(
SK_AC       *pAC,       /* Adapter Context */
SK_IOC            IoC,        /* Io Context */
int               Port,       /* Port Num = PHY Num */
SK_U16            IStatus)    /* Interrupt Status */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      SK_EVPARA   Para;

      pPrt = &pAC->GIni.GP[Port];

      if ((IStatus & PHY_B_IS_PSE) != 0) {
            /* Incorrectable pair swap error */
            SK_ERR_LOG(pAC, SK_ERRCL_HW | SK_ERRCL_INIT, SKERR_SIRQ_E022,
                  SKERR_SIRQ_E022MSG);
      }
      
      if ((IStatus & (PHY_B_IS_AN_PR | PHY_B_IS_LST_CHANGE)) != 0) {

            SkHWLinkDown(pAC, IoC, Port);

            Para.Para32[0] = (SK_U32)Port;
            /* Signal to RLMT */
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);

            /* Start workaround Errata #2 timer */
            SkTimerStart(pAC, IoC, &pPrt->PWaTimer, SK_WA_INA_TIME,
                  SKGE_HWAC, SK_HWEV_WATIM, Para);
      }

}     /* SkPhyIsrBcom */
#endif /* GENESIS */


#ifdef YUKON
/******************************************************************************
 *
 *    SkPhyIsrGmac() - PHY interrupt service routine
 *
 * Description: handles all interrupts from Marvell PHY
 *
 * Returns: N/A
 */
static void SkPhyIsrGmac(
SK_AC       *pAC,       /* Adapter Context */
SK_IOC            IoC,        /* Io Context */
int               Port,       /* Port Num = PHY Num */
SK_U16            IStatus)    /* Interrupt Status */
{
      SK_GEPORT   *pPrt;            /* GIni Port struct pointer */
      SK_EVPARA   Para;
      SK_U16            Word;

      pPrt = &pAC->GIni.GP[Port];

      if ((IStatus & (PHY_M_IS_AN_PR | PHY_M_IS_LST_CHANGE)) != 0) {

            SkHWLinkDown(pAC, IoC, Port);

            SkGmPhyRead(pAC, IoC, Port, PHY_MARV_AUNE_ADV, &Word);

            SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
                  ("AutoNeg.Adv: 0x%04X\n", Word));
            
            /* Set Auto-negotiation advertisement */
            if (pPrt->PFlowCtrlMode == SK_FLOW_MODE_SYM_OR_REM) {
                  /* restore Asymmetric Pause bit */
                  SkGmPhyWrite(pAC, IoC, Port, PHY_MARV_AUNE_ADV,
                        (SK_U16)(Word | PHY_M_AN_ASP));
            }
            
            Para.Para32[0] = (SK_U32)Port;
            /* Signal to RLMT */
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }
      
      if ((IStatus & PHY_M_IS_AN_ERROR) != 0) {
            /* Auto-Negotiation Error */
            SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E023, SKERR_SIRQ_E023MSG);
      }
      
      if ((IStatus & PHY_M_IS_FIFO_ERROR) != 0) {
            /* FIFO Overflow/Underrun Error */
            SK_ERR_LOG(pAC, SK_ERRCL_HW, SKERR_SIRQ_E024, SKERR_SIRQ_E024MSG);
      }
      
}     /* SkPhyIsrGmac */
#endif /* YUKON */


#ifdef OTHER_PHY
/******************************************************************************
 *
 *    SkPhyIsrLone() - PHY interrupt service routine
 *
 * Description: handles all interrupts from LONE PHY
 *
 * Returns: N/A
 */
static void SkPhyIsrLone(
SK_AC *pAC,       /* Adapter Context */
SK_IOC      IoC,        /* Io Context */
int         Port,       /* Port Num = PHY Num */
SK_U16      IStatus)    /* Interrupt Status */
{
      SK_EVPARA   Para;

      if (IStatus & (PHY_L_IS_DUP | PHY_L_IS_ISOL)) {
            
            SkHWLinkDown(pAC, IoC, Port);

            Para.Para32[0] = (SK_U32)Port;
            /* Signal to RLMT */
            SkEventQueue(pAC, SKGE_RLMT, SK_RLMT_LINK_DOWN, Para);
      }

}     /* SkPhyIsrLone */
#endif /* OTHER_PHY */

/* End of File */

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