skgesirq.c

linux-2.6.15.6

/******************************************************************************
 *
 * 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
 */
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 */