skgesirq.c

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/******************************************************************************
 *
 * 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);
			SK_DBG_MSG(pAC, SK_DBGMOD_HWM, SK_DBGCAT_CTRL,
				("AutoNeg done Port %d\n", Port));
			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,