ipath_pe800.c 43.1 KB
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/*
 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
/*
 * This file contains all of the code that is specific to the
 * InfiniPath PE-800 chip.
 */

#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>


#include "ipath_kernel.h"
#include "ipath_registers.h"

/*
 * This file contains all the chip-specific register information and
 * access functions for the PathScale PE800, the PCI-Express chip.
 *
 * This lists the InfiniPath PE800 registers, in the actual chip layout.
 * This structure should never be directly accessed.
 */
struct _infinipath_do_not_use_kernel_regs {
	unsigned long long Revision;
	unsigned long long Control;
	unsigned long long PageAlign;
	unsigned long long PortCnt;
	unsigned long long DebugPortSelect;
	unsigned long long Reserved0;
	unsigned long long SendRegBase;
	unsigned long long UserRegBase;
	unsigned long long CounterRegBase;
	unsigned long long Scratch;
	unsigned long long Reserved1;
	unsigned long long Reserved2;
	unsigned long long IntBlocked;
	unsigned long long IntMask;
	unsigned long long IntStatus;
	unsigned long long IntClear;
	unsigned long long ErrorMask;
	unsigned long long ErrorStatus;
	unsigned long long ErrorClear;
	unsigned long long HwErrMask;
	unsigned long long HwErrStatus;
	unsigned long long HwErrClear;
	unsigned long long HwDiagCtrl;
	unsigned long long MDIO;
	unsigned long long IBCStatus;
	unsigned long long IBCCtrl;
	unsigned long long ExtStatus;
	unsigned long long ExtCtrl;
	unsigned long long GPIOOut;
	unsigned long long GPIOMask;
	unsigned long long GPIOStatus;
	unsigned long long GPIOClear;
	unsigned long long RcvCtrl;
	unsigned long long RcvBTHQP;
	unsigned long long RcvHdrSize;
	unsigned long long RcvHdrCnt;
	unsigned long long RcvHdrEntSize;
	unsigned long long RcvTIDBase;
	unsigned long long RcvTIDCnt;
	unsigned long long RcvEgrBase;
	unsigned long long RcvEgrCnt;
	unsigned long long RcvBufBase;
	unsigned long long RcvBufSize;
	unsigned long long RxIntMemBase;
	unsigned long long RxIntMemSize;
	unsigned long long RcvPartitionKey;
	unsigned long long Reserved3;
	unsigned long long RcvPktLEDCnt;
	unsigned long long Reserved4[8];
	unsigned long long SendCtrl;
	unsigned long long SendPIOBufBase;
	unsigned long long SendPIOSize;
	unsigned long long SendPIOBufCnt;
	unsigned long long SendPIOAvailAddr;
	unsigned long long TxIntMemBase;
	unsigned long long TxIntMemSize;
	unsigned long long Reserved5;
	unsigned long long PCIeRBufTestReg0;
	unsigned long long PCIeRBufTestReg1;
	unsigned long long Reserved51[6];
	unsigned long long SendBufferError;
	unsigned long long SendBufferErrorCONT1;
	unsigned long long Reserved6SBE[6];
	unsigned long long RcvHdrAddr0;
	unsigned long long RcvHdrAddr1;
	unsigned long long RcvHdrAddr2;
	unsigned long long RcvHdrAddr3;
	unsigned long long RcvHdrAddr4;
	unsigned long long Reserved7RHA[11];
	unsigned long long RcvHdrTailAddr0;
	unsigned long long RcvHdrTailAddr1;
	unsigned long long RcvHdrTailAddr2;
	unsigned long long RcvHdrTailAddr3;
	unsigned long long RcvHdrTailAddr4;
	unsigned long long Reserved8RHTA[11];
	unsigned long long Reserved9SW[8];
	unsigned long long SerdesConfig0;
	unsigned long long SerdesConfig1;
	unsigned long long SerdesStatus;
	unsigned long long XGXSConfig;
	unsigned long long IBPLLCfg;
	unsigned long long Reserved10SW2[3];
	unsigned long long PCIEQ0SerdesConfig0;
	unsigned long long PCIEQ0SerdesConfig1;
	unsigned long long PCIEQ0SerdesStatus;
	unsigned long long Reserved11;
	unsigned long long PCIEQ1SerdesConfig0;
	unsigned long long PCIEQ1SerdesConfig1;
	unsigned long long PCIEQ1SerdesStatus;
	unsigned long long Reserved12;
};

#define IPATH_KREG_OFFSET(field) (offsetof(struct \
    _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
#define IPATH_CREG_OFFSET(field) (offsetof( \
    struct infinipath_counters, field) / sizeof(u64))

static const struct ipath_kregs ipath_pe_kregs = {
	.kr_control = IPATH_KREG_OFFSET(Control),
	.kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
	.kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
	.kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
	.kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
	.kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
	.kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
	.kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
	.kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
	.kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
	.kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
	.kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
	.kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
	.kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
	.kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
	.kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
	.kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
	.kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
	.kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
	.kr_intclear = IPATH_KREG_OFFSET(IntClear),
	.kr_intmask = IPATH_KREG_OFFSET(IntMask),
	.kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
	.kr_mdio = IPATH_KREG_OFFSET(MDIO),
	.kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
	.kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
	.kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
	.kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
	.kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
	.kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
	.kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
	.kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
	.kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
	.kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
	.kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
	.kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
	.kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
	.kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
	.kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
	.kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
	.kr_revision = IPATH_KREG_OFFSET(Revision),
	.kr_scratch = IPATH_KREG_OFFSET(Scratch),
	.kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
	.kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
	.kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
	.kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
	.kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
	.kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
	.kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
	.kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
	.kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
	.kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
	.kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
	.kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
	.kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
	.kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
	.kr_ibpllcfg = IPATH_KREG_OFFSET(IBPLLCfg),

	/*
	 * These should not be used directly via ipath_read_kreg64(),
	 * use them with ipath_read_kreg64_port()
	 */
	.kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
	.kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0),

	/* This group is pe-800-specific; and used only in this file */
	/* The rcvpktled register controls one of the debug port signals, so
	 * a packet activity LED can be connected to it. */
	.kr_rcvpktledcnt = IPATH_KREG_OFFSET(RcvPktLEDCnt),
	.kr_pcierbuftestreg0 = IPATH_KREG_OFFSET(PCIeRBufTestReg0),
	.kr_pcierbuftestreg1 = IPATH_KREG_OFFSET(PCIeRBufTestReg1),
	.kr_pcieq0serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig0),
	.kr_pcieq0serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig1),
	.kr_pcieq0serdesstatus = IPATH_KREG_OFFSET(PCIEQ0SerdesStatus),
	.kr_pcieq1serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig0),
	.kr_pcieq1serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig1),
	.kr_pcieq1serdesstatus = IPATH_KREG_OFFSET(PCIEQ1SerdesStatus)
};

static const struct ipath_cregs ipath_pe_cregs = {
	.cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
	.cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
	.cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
	.cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
	.cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
	.cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
	.cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
	.cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
	.cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
	.cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
	.cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
	.cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
	.cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
	.cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
	.cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
	.cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
	.cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
	.cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
	.cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
	.cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
	.cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
	.cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
	.cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
	.cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
	.cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
	.cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
	.cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
	.cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
	.cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
	.cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
	.cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
	.cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
	.cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
};

/* kr_intstatus, kr_intclear, kr_intmask bits */
#define INFINIPATH_I_RCVURG_MASK 0x1F
#define INFINIPATH_I_RCVAVAIL_MASK 0x1F

/* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
#define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK  0x000000000000003fULL
#define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
#define INFINIPATH_HWE_PCIEPOISONEDTLP      0x0000000010000000ULL
#define INFINIPATH_HWE_PCIECPLTIMEOUT       0x0000000020000000ULL
#define INFINIPATH_HWE_PCIEBUSPARITYXTLH    0x0000000040000000ULL
#define INFINIPATH_HWE_PCIEBUSPARITYXADM    0x0000000080000000ULL
#define INFINIPATH_HWE_PCIEBUSPARITYRADM    0x0000000100000000ULL
#define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
#define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
#define INFINIPATH_HWE_PCIE1PLLFAILED       0x0400000000000000ULL
#define INFINIPATH_HWE_PCIE0PLLFAILED       0x0800000000000000ULL
#define INFINIPATH_HWE_SERDESPLLFAILED      0x1000000000000000ULL

/* kr_extstatus bits */
#define INFINIPATH_EXTS_FREQSEL 0x2
#define INFINIPATH_EXTS_SERDESSEL 0x4
#define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
#define INFINIPATH_EXTS_MEMBIST_FOUND       0x0000000000008000

#define _IPATH_GPIO_SDA_NUM 1
#define _IPATH_GPIO_SCL_NUM 0

#define IPATH_GPIO_SDA (1ULL << \
	(_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
#define IPATH_GPIO_SCL (1ULL << \
	(_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))

/**
 * ipath_pe_handle_hwerrors - display hardware errors.
 * @dd: the infinipath device
 * @msg: the output buffer
 * @msgl: the size of the output buffer
 *
 * Use same msg buffer as regular errors to avoid excessive stack
 * use.  Most hardware errors are catastrophic, but for right now,
 * we'll print them and continue.  We reuse the same message buffer as
 * ipath_handle_errors() to avoid excessive stack usage.
 */
308 309
static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
				     size_t msgl)
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{
	ipath_err_t hwerrs;
	u32 bits, ctrl;
	int isfatal = 0;
	char bitsmsg[64];

	hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
	if (!hwerrs) {
		/*
		 * better than printing cofusing messages
		 * This seems to be related to clearing the crc error, or
		 * the pll error during init.
		 */
		ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
		return;
	} else if (hwerrs == ~0ULL) {
		ipath_dev_err(dd, "Read of hardware error status failed "
			      "(all bits set); ignoring\n");
		return;
	}
	ipath_stats.sps_hwerrs++;

	/* Always clear the error status register, except MEMBISTFAIL,
	 * regardless of whether we continue or stop using the chip.
	 * We want that set so we know it failed, even across driver reload.
	 * We'll still ignore it in the hwerrmask.  We do this partly for
	 * diagnostics, but also for support */
	ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
			 hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);

	hwerrs &= dd->ipath_hwerrmask;

	/*
	 * make sure we get this much out, unless told to be quiet,
	 * or it's occurred within the last 5 seconds
	 */
	if ((hwerrs & ~dd->ipath_lasthwerror) ||
	    (ipath_debug & __IPATH_VERBDBG))
		dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
			 "(cleared)\n", (unsigned long long) hwerrs);
	dd->ipath_lasthwerror |= hwerrs;

	if (hwerrs & ~infinipath_hwe_bitsextant)
		ipath_dev_err(dd, "hwerror interrupt with unknown errors "
			      "%llx set\n", (unsigned long long)
			      (hwerrs & ~infinipath_hwe_bitsextant));

	ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
	if (ctrl & INFINIPATH_C_FREEZEMODE) {
		if (hwerrs) {
			/*
			 * if any set that we aren't ignoring only make the
			 * complaint once, in case it's stuck or recurring,
			 * and we get here multiple times
			 */
			if (dd->ipath_flags & IPATH_INITTED) {
				ipath_dev_err(dd, "Fatal Error (freeze "
					      "mode), no longer usable\n");
				isfatal = 1;
			}
			/*
			 * Mark as having had an error for driver, and also
			 * for /sys and status word mapped to user programs.
			 * This marks unit as not usable, until reset
			 */
			*dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
			*dd->ipath_statusp |= IPATH_STATUS_HWERROR;
			dd->ipath_flags &= ~IPATH_INITTED;
		} else {
			ipath_dbg("Clearing freezemode on ignored hardware "
				  "error\n");
			ctrl &= ~INFINIPATH_C_FREEZEMODE;
			ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
					 ctrl);
		}
	}

	*msg = '\0';

	if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
		strlcat(msg, "[Memory BIST test failed, PE-800 unusable]",
			msgl);
		/* ignore from now on, so disable until driver reloaded */
		*dd->ipath_statusp |= IPATH_STATUS_HWERROR;
		dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
		ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
				 dd->ipath_hwerrmask);
	}
	if (hwerrs & (INFINIPATH_HWE_RXEMEMPARITYERR_MASK
		      << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)) {
		bits = (u32) ((hwerrs >>
			       INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) &
			      INFINIPATH_HWE_RXEMEMPARITYERR_MASK);
		snprintf(bitsmsg, sizeof bitsmsg, "[RXE Parity Errs %x] ",
			 bits);
		strlcat(msg, bitsmsg, msgl);
	}
	if (hwerrs & (INFINIPATH_HWE_TXEMEMPARITYERR_MASK
		      << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)) {
		bits = (u32) ((hwerrs >>
			       INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) &
			      INFINIPATH_HWE_TXEMEMPARITYERR_MASK);
		snprintf(bitsmsg, sizeof bitsmsg, "[TXE Parity Errs %x] ",
			 bits);
		strlcat(msg, bitsmsg, msgl);
	}
	if (hwerrs & (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK
		      << INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT)) {
		bits = (u32) ((hwerrs >>
			       INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) &
			      INFINIPATH_HWE_PCIEMEMPARITYERR_MASK);
		snprintf(bitsmsg, sizeof bitsmsg,
			 "[PCIe Mem Parity Errs %x] ", bits);
		strlcat(msg, bitsmsg, msgl);
	}
	if (hwerrs & INFINIPATH_HWE_IBCBUSTOSPCPARITYERR)
		strlcat(msg, "[IB2IPATH Parity]", msgl);
	if (hwerrs & INFINIPATH_HWE_IBCBUSFRSPCPARITYERR)
		strlcat(msg, "[IPATH2IB Parity]", msgl);

#define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |	\
			 INFINIPATH_HWE_COREPLL_RFSLIP )

	if (hwerrs & _IPATH_PLL_FAIL) {
		snprintf(bitsmsg, sizeof bitsmsg,
			 "[PLL failed (%llx), PE-800 unusable]",
			 (unsigned long long) hwerrs & _IPATH_PLL_FAIL);
		strlcat(msg, bitsmsg, msgl);
		/* ignore from now on, so disable until driver reloaded */
		dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
		ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
				 dd->ipath_hwerrmask);
	}

	if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
		/*
		 * If it occurs, it is left masked since the eternal
		 * interface is unused
		 */
		dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
		ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
				 dd->ipath_hwerrmask);
	}

	if (hwerrs & INFINIPATH_HWE_PCIEPOISONEDTLP)
		strlcat(msg, "[PCIe Poisoned TLP]", msgl);
	if (hwerrs & INFINIPATH_HWE_PCIECPLTIMEOUT)
		strlcat(msg, "[PCIe completion timeout]", msgl);

	/*
	 * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
	 * parity or memory parity error failures, because most likely we
	 * won't be able to talk to the core of the chip.  Nonetheless, we
	 * might see them, if they are in parts of the PCIe core that aren't
	 * essential.
	 */
	if (hwerrs & INFINIPATH_HWE_PCIE1PLLFAILED)
		strlcat(msg, "[PCIePLL1]", msgl);
	if (hwerrs & INFINIPATH_HWE_PCIE0PLLFAILED)
		strlcat(msg, "[PCIePLL0]", msgl);
	if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYXTLH)
		strlcat(msg, "[PCIe XTLH core parity]", msgl);
	if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYXADM)
		strlcat(msg, "[PCIe ADM TX core parity]", msgl);
	if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYRADM)
		strlcat(msg, "[PCIe ADM RX core parity]", msgl);

	if (hwerrs & INFINIPATH_HWE_RXDSYNCMEMPARITYERR)
		strlcat(msg, "[Rx Dsync]", msgl);
	if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED)
		strlcat(msg, "[SerDes PLL]", msgl);

	ipath_dev_err(dd, "%s hardware error\n", msg);
	if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg) {
		/*
		 * for /sys status file ; if no trailing } is copied, we'll
		 * know it was truncated.
		 */
		snprintf(dd->ipath_freezemsg, dd->ipath_freezelen,
			 "{%s}", msg);
	}
}

/**
 * ipath_pe_boardname - fill in the board name
 * @dd: the infinipath device
 * @name: the output buffer
 * @namelen: the size of the output buffer
 *
 * info is based on the board revision register
 */
static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
			      size_t namelen)
{
	char *n = NULL;
	u8 boardrev = dd->ipath_boardrev;
	int ret;

	switch (boardrev) {
	case 0:
		n = "InfiniPath_Emulation";
		break;
	case 1:
		n = "InfiniPath_PE-800-Bringup";
		break;
	case 2:
		n = "InfiniPath_PE-880";
		break;
	case 3:
		n = "InfiniPath_PE-850";
		break;
	case 4:
		n = "InfiniPath_PE-860";
		break;
	default:
		ipath_dev_err(dd,
			      "Don't yet know about board with ID %u\n",
			      boardrev);
		snprintf(name, namelen, "Unknown_InfiniPath_PE-8xx_%u",
			 boardrev);
		break;
	}
	if (n)
		snprintf(name, namelen, "%s", n);

	if (dd->ipath_majrev != 4 || dd->ipath_minrev != 1) {
		ipath_dev_err(dd, "Unsupported PE-800 revision %u.%u!\n",
			      dd->ipath_majrev, dd->ipath_minrev);
		ret = 1;
	} else
		ret = 0;

	return ret;
}

/**
 * ipath_pe_init_hwerrors - enable hardware errors
 * @dd: the infinipath device
 *
 * now that we have finished initializing everything that might reasonably
 * cause a hardware error, and cleared those errors bits as they occur,
 * we can enable hardware errors in the mask (potentially enabling
 * freeze mode), and enable hardware errors as errors (along with
 * everything else) in errormask
 */
555
static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579
{
	ipath_err_t val;
	u64 extsval;

	extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);

	if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
		ipath_dev_err(dd, "MemBIST did not complete!\n");

	val = ~0ULL;	/* barring bugs, all hwerrors become interrupts, */

	if (!dd->ipath_boardrev)	// no PLL for Emulator
		val &= ~INFINIPATH_HWE_SERDESPLLFAILED;

	/* workaround bug 9460 in internal interface bus parity checking */
	val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;

	dd->ipath_hwerrmask = val;
}

/**
 * ipath_pe_bringup_serdes - bring up the serdes
 * @dd: the infinipath device
 */
580
static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
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{
	u64 val, tmp, config1;
	int ret = 0, change = 0;

	ipath_dbg("Trying to bringup serdes\n");

	if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
	    INFINIPATH_HWE_SERDESPLLFAILED) {
		ipath_dbg("At start, serdes PLL failed bit set "
			  "in hwerrstatus, clearing and continuing\n");
		ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
				 INFINIPATH_HWE_SERDESPLLFAILED);
	}

	val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
	config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);

	ipath_cdbg(VERBOSE, "SerDes status config0=%llx config1=%llx, "
		   "xgxsconfig %llx\n", (unsigned long long) val,
		   (unsigned long long) config1, (unsigned long long)
		   ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));

	/*
	 * Force reset on, also set rxdetect enable.  Must do before reading
	 * serdesstatus at least for simulation, or some of the bits in
	 * serdes status will come back as undefined and cause simulation
	 * failures
	 */
	val |= INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RXDETECT_EN
		| INFINIPATH_SERDC0_L1PWR_DN;
	ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
	/* be sure chip saw it */
	tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
	udelay(5);		/* need pll reset set at least for a bit */
	/*
	 * after PLL is reset, set the per-lane Resets and TxIdle and
	 * clear the PLL reset and rxdetect (to get falling edge).
	 * Leave L1PWR bits set (permanently)
	 */
	val &= ~(INFINIPATH_SERDC0_RXDETECT_EN | INFINIPATH_SERDC0_RESET_PLL
		 | INFINIPATH_SERDC0_L1PWR_DN);
	val |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
	ipath_cdbg(VERBOSE, "Clearing pll reset and setting lane resets "
		   "and txidle (%llx)\n", (unsigned long long) val);
	ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
	/* be sure chip saw it */
	tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
	/* need PLL reset clear for at least 11 usec before lane
	 * resets cleared; give it a few more to be sure */
	udelay(15);
	val &= ~(INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE);

	ipath_cdbg(VERBOSE, "Clearing lane resets and txidle "
		   "(writing %llx)\n", (unsigned long long) val);
	ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
	/* be sure chip saw it */
	val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);

	val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
	if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
	     INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
		val &=
			~(INFINIPATH_XGXS_MDIOADDR_MASK <<
			  INFINIPATH_XGXS_MDIOADDR_SHIFT);
		/* MDIO address 3 */
		val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
		change = 1;
	}
	if (val & INFINIPATH_XGXS_RESET) {
		val &= ~INFINIPATH_XGXS_RESET;
		change = 1;
	}
	if (change)
		ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);

	val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);

	/* clear current and de-emphasis bits */
	config1 &= ~0x0ffffffff00ULL;
	/* set current to 20ma */
	config1 |= 0x00000000000ULL;
	/* set de-emphasis to -5.68dB */
	config1 |= 0x0cccc000000ULL;
	ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);

	ipath_cdbg(VERBOSE, "done: SerDes status config0=%llx "
		   "config1=%llx, sstatus=%llx xgxs=%llx\n",
		   (unsigned long long) val, (unsigned long long) config1,
		   (unsigned long long)
		   ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
		   (unsigned long long)
		   ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));

	if (!ipath_waitfor_mdio_cmdready(dd)) {
		ipath_write_kreg(
			dd, dd->ipath_kregs->kr_mdio,
			ipath_mdio_req(IPATH_MDIO_CMD_READ, 31,
				       IPATH_MDIO_CTRL_XGXS_REG_8, 0));
		if (ipath_waitfor_complete(dd, dd->ipath_kregs->kr_mdio,
					   IPATH_MDIO_DATAVALID, &val))
			ipath_dbg("Never got MDIO data for XGXS "
				  "status read\n");
		else
			ipath_cdbg(VERBOSE, "MDIO Read reg8, "
				   "'bank' 31 %x\n", (u32) val);
	} else
		ipath_dbg("Never got MDIO cmdready for XGXS status read\n");

	return ret;
}

/**
 * ipath_pe_quiet_serdes - set serdes to txidle
 * @dd: the infinipath device
 * Called when driver is being unloaded
 */
697
static void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
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{
	u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);

	val |= INFINIPATH_SERDC0_TXIDLE;
	ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
		  (unsigned long long) val);
	ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
}

/* this is not yet needed on the PE800, so just return 0. */
static int ipath_pe_intconfig(struct ipath_devdata *dd)
{
	return 0;
}

/**
 * ipath_setup_pe_setextled - set the state of the two external LEDs
 * @dd: the infinipath device
 * @lst: the L state
 * @ltst: the LT state

 * These LEDs indicate the physical and logical state of IB link.
 * For this chip (at least with recommended board pinouts), LED1
 * is Yellow (logical state) and LED2 is Green (physical state),
 *
 * Note:  We try to match the Mellanox HCA LED behavior as best
 * we can.  Green indicates physical link state is OK (something is
 * plugged in, and we can train).
 * Amber indicates the link is logically up (ACTIVE).
 * Mellanox further blinks the amber LED to indicate data packet
 * activity, but we have no hardware support for that, so it would
 * require waking up every 10-20 msecs and checking the counters
 * on the chip, and then turning the LED off if appropriate.  That's
 * visible overhead, so not something we will do.
 *
 */
static void ipath_setup_pe_setextled(struct ipath_devdata *dd, u64 lst,
				     u64 ltst)
{
	u64 extctl;

	/* the diags use the LED to indicate diag info, so we leave
	 * the external LED alone when the diags are running */
	if (ipath_diag_inuse)
		return;

	extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
				       INFINIPATH_EXTC_LED2PRIPORT_ON);

	if (ltst & INFINIPATH_IBCS_LT_STATE_LINKUP)
		extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
	if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
		extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
	dd->ipath_extctrl = extctl;
	ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
}

/**
 * ipath_setup_pe_cleanup - clean up any per-chip chip-specific stuff
 * @dd: the infinipath device
 *
 * This is called during driver unload.
 * We do the pci_disable_msi here, not in generic code, because it
 * isn't used for the HT-400. If we do end up needing pci_enable_msi
 * at some point in the future for HT-400, we'll move the call back
 * into the main init_one code.
 */
static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
{
	dd->ipath_msi_lo = 0;	/* just in case unload fails */
	pci_disable_msi(dd->pcidev);
}

/**
 * ipath_setup_pe_config - setup PCIe config related stuff
 * @dd: the infinipath device
 * @pdev: the PCI device
 *
 * The pci_enable_msi() call will fail on systems with MSI quirks
 * such as those with AMD8131, even if the device of interest is not
 * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
 * late in 2.6.16).
 * All that can be done is to edit the kernel source to remove the quirk
 * check until that is fixed.
 * We do not need to call enable_msi() for our HyperTransport chip (HT-400),
 * even those it uses MSI, and we want to avoid the quirk warning, so
 * So we call enable_msi only for the PE-800.  If we do end up needing
 * pci_enable_msi at some point in the future for HT-400, we'll move the
 * call back into the main init_one code.
 * We save the msi lo and hi values, so we can restore them after
 * chip reset (the kernel PCI infrastructure doesn't yet handle that
 * correctly).
 */
static int ipath_setup_pe_config(struct ipath_devdata *dd,
				 struct pci_dev *pdev)
{
	int pos, ret;

	dd->ipath_msi_lo = 0;	/* used as a flag during reset processing */
	ret = pci_enable_msi(dd->pcidev);
	if (ret)
		ipath_dev_err(dd, "pci_enable_msi failed: %d, "
			      "interrupts may not work\n", ret);
	/* continue even if it fails, we may still be OK... */

	if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
		u16 control;
		pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
				      &dd->ipath_msi_lo);
		pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
				      &dd->ipath_msi_hi);
		pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
				     &control);
		/* now save the data (vector) info */
		pci_read_config_word(dd->pcidev,
				     pos + ((control & PCI_MSI_FLAGS_64BIT)
					    ? 12 : 8),
				     &dd->ipath_msi_data);
		ipath_cdbg(VERBOSE, "Read msi data 0x%x from config offset "
			   "0x%x, control=0x%x\n", dd->ipath_msi_data,
			   pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
			   control);
		/* we save the cachelinesize also, although it doesn't
		 * really matter */
		pci_read_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
				     &dd->ipath_pci_cacheline);
	} else
		ipath_dev_err(dd, "Can't find MSI capability, "
			      "can't save MSI settings for reset\n");
	if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP))) {
		u16 linkstat;
		pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
				     &linkstat);
		linkstat >>= 4;
		linkstat &= 0x1f;
		if (linkstat != 8)
			ipath_dev_err(dd, "PCIe width %u, "
				      "performance reduced\n", linkstat);
	}
	else
		ipath_dev_err(dd, "Can't find PCI Express "
			      "capability!\n");
	return 0;
}

static void ipath_init_pe_variables(void)
{
	/*
	 * bits for selecting i2c direction and values,
	 * used for I2C serial flash
	 */
	ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
	ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
	ipath_gpio_sda = IPATH_GPIO_SDA;
	ipath_gpio_scl = IPATH_GPIO_SCL;

	/* variables for sanity checking interrupt and errors */
	infinipath_hwe_bitsextant =
		(INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
		 INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
		(INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
		 INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
		INFINIPATH_HWE_PCIE1PLLFAILED |
		INFINIPATH_HWE_PCIE0PLLFAILED |
		INFINIPATH_HWE_PCIEPOISONEDTLP |
		INFINIPATH_HWE_PCIECPLTIMEOUT |
		INFINIPATH_HWE_PCIEBUSPARITYXTLH |
		INFINIPATH_HWE_PCIEBUSPARITYXADM |
		INFINIPATH_HWE_PCIEBUSPARITYRADM |
		INFINIPATH_HWE_MEMBISTFAILED |
		INFINIPATH_HWE_COREPLL_FBSLIP |
		INFINIPATH_HWE_COREPLL_RFSLIP |
		INFINIPATH_HWE_SERDESPLLFAILED |
		INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
		INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
	infinipath_i_bitsextant =
		(INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
		(INFINIPATH_I_RCVAVAIL_MASK <<
		 INFINIPATH_I_RCVAVAIL_SHIFT) |
		INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
		INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
	infinipath_e_bitsextant =
		INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
		INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
		INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
		INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
		INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
		INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
		INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
		INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
		INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
		INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
		INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
		INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
		INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
		INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
		INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
		INFINIPATH_E_HARDWARE;

	infinipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
	infinipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
}

/* setup the MSI stuff again after a reset.  I'd like to just call
 * pci_enable_msi() and request_irq() again, but when I do that,
 * the MSI enable bit doesn't get set in the command word, and
 * we switch to to a different interrupt vector, which is confusing,
 * so I instead just do it all inline.  Perhaps somehow can tie this
 * into the PCIe hotplug support at some point
 * Note, because I'm doing it all here, I don't call pci_disable_msi()
 * or free_irq() at the start of ipath_setup_pe_reset().
 */
static int ipath_reinit_msi(struct ipath_devdata *dd)
{
	int pos;
	u16 control;
	int ret;

	if (!dd->ipath_msi_lo) {
		dev_info(&dd->pcidev->dev, "Can't restore MSI config, "
			 "initial setup failed?\n");
		ret = 0;
		goto bail;
	}

	if (!(pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
		ipath_dev_err(dd, "Can't find MSI capability, "
			      "can't restore MSI settings\n");
		ret = 0;
		goto bail;
	}
	ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
		   dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
	pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
			       dd->ipath_msi_lo);
	ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
		   dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
	pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
			       dd->ipath_msi_hi);
	pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
	if (!(control & PCI_MSI_FLAGS_ENABLE)) {
		ipath_cdbg(VERBOSE, "MSI control at off %x was %x, "
			   "setting MSI enable (%x)\n", pos + PCI_MSI_FLAGS,
			   control, control | PCI_MSI_FLAGS_ENABLE);
		control |= PCI_MSI_FLAGS_ENABLE;
		pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
				      control);
	}
	/* now rewrite the data (vector) info */
	pci_write_config_word(dd->pcidev, pos +
			      ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
			      dd->ipath_msi_data);
	/* we restore the cachelinesize also, although it doesn't really
	 * matter */
	pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
			      dd->ipath_pci_cacheline);
	/* and now set the pci master bit again */
	pci_set_master(dd->pcidev);
	ret = 1;

bail:
	return ret;
}

/* This routine sleeps, so it can only be called from user context, not
 * from interrupt context.  If we need interrupt context, we can split
 * it into two routines.
*/
static int ipath_setup_pe_reset(struct ipath_devdata *dd)
{
	u64 val;
	int i;
	int ret;

	/* Use ERROR so it shows up in logs, etc. */
	ipath_dev_err(dd, "Resetting PE-800 unit %u\n",
		      dd->ipath_unit);
975 976
	/* keep chip from being accessed in a few places */
	dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT);
977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
	val = dd->ipath_control | INFINIPATH_C_RESET;
	ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
	mb();

	for (i = 1; i <= 5; i++) {
		int r;
		/* allow MBIST, etc. to complete; longer on each retry.
		 * We sometimes get machine checks from bus timeout if no
		 * response, so for now, make it *really* long.
		 */
		msleep(1000 + (1 + i) * 2000);
		if ((r =
		     pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
					    dd->ipath_pcibar0)))
			ipath_dev_err(dd, "rewrite of BAR0 failed: %d\n",
				      r);
		if ((r =
		     pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
					    dd->ipath_pcibar1)))
			ipath_dev_err(dd, "rewrite of BAR1 failed: %d\n",
				      r);
		/* now re-enable memory access */
		if ((r = pci_enable_device(dd->pcidev)))
			ipath_dev_err(dd, "pci_enable_device failed after "
				      "reset: %d\n", r);
1002 1003
		/* whether it worked or not, mark as present, again */
		dd->ipath_flags |= IPATH_PRESENT;
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
		val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
		if (val == dd->ipath_revision) {
			ipath_cdbg(VERBOSE, "Got matching revision "
				   "register %llx on try %d\n",
				   (unsigned long long) val, i);
			ret = ipath_reinit_msi(dd);
			goto bail;
		}
		/* Probably getting -1 back */
		ipath_dbg("Didn't get expected revision register, "
			  "got %llx, try %d\n", (unsigned long long) val,
			  i + 1);
	}
	ret = 0; /* failed */

bail:
	return ret;
}

/**
 * ipath_pe_put_tid - write a TID in chip
 * @dd: the infinipath device
 * @tidptr: pointer to the expected TID (in chip) to udpate
 * @tidtype: 0 for eager, 1 for expected
 * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
 *
 * This exists as a separate routine to allow for special locking etc.
 * It's used for both the full cleanup on exit, as well as the normal
 * setup and teardown.
 */
static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
			     u32 type, unsigned long pa)
{
	u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
	unsigned long flags = 0; /* keep gcc quiet */

	if (pa != dd->ipath_tidinvalid) {
		if (pa & ((1U << 11) - 1)) {
			dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
				 "not 4KB aligned!\n", pa);
			return;
		}
		pa >>= 11;
		/* paranoia check */
		if (pa & (7<<29))
			ipath_dev_err(dd,
				      "BUG: Physical page address 0x%lx "
				      "has bits set in 31-29\n", pa);

		if (type == 0)
			pa |= dd->ipath_tidtemplate;
		else /* for now, always full 4KB page */
			pa |= 2 << 29;
	}

	/* workaround chip bug 9437 by writing each TID twice
	 * and holding a spinlock around the writes, so they don't
	 * intermix with other TID (eager or expected) writes
	 * Unfortunately, this call can be done from interrupt level
	 * for the port 0 eager TIDs, so we have to use irqsave
	 */
	spin_lock_irqsave(&dd->ipath_tid_lock, flags);
	ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xfeeddeaf);
	if (dd->ipath_kregbase)
		writel(pa, tidp32);
	ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xdeadbeef);
	mmiowb();
	spin_unlock_irqrestore(&dd->ipath_tid_lock, flags);
}

/**
 * ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
 * @dd: the infinipath device
 * @port: the port
 *
 * clear all TID entries for a port, expected and eager.
 * Used from ipath_close().  On PE800, TIDs are only 32 bits,
 * not 64, but they are still on 64 bit boundaries, so tidbase
 * is declared as u64 * for the pointer math, even though we write 32 bits
 */
static void ipath_pe_clear_tids(struct ipath_devdata *dd, unsigned port)
{
	u64 __iomem *tidbase;
	unsigned long tidinv;
	int i;

	if (!dd->ipath_kregbase)
		return;

	ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);

	tidinv = dd->ipath_tidinvalid;
	tidbase = (u64 __iomem *)
		((char __iomem *)(dd->ipath_kregbase) +
		 dd->ipath_rcvtidbase +
		 port * dd->ipath_rcvtidcnt * sizeof(*tidbase));

	for (i = 0; i < dd->ipath_rcvtidcnt; i++)
		ipath_pe_put_tid(dd, &tidbase[i], 0, tidinv);

	tidbase = (u64 __iomem *)
		((char __iomem *)(dd->ipath_kregbase) +
		 dd->ipath_rcvegrbase +
		 port * dd->ipath_rcvegrcnt * sizeof(*tidbase));

	for (i = 0; i < dd->ipath_rcvegrcnt; i++)
		ipath_pe_put_tid(dd, &tidbase[i], 1, tidinv);
}

/**
 * ipath_pe_tidtemplate - setup constants for TID updates
 * @dd: the infinipath device
 *
 * We setup stuff that we use a lot, to avoid calculating each time
 */
static void ipath_pe_tidtemplate(struct ipath_devdata *dd)
{
	u32 egrsize = dd->ipath_rcvegrbufsize;

	/* For now, we always allocate 4KB buffers (at init) so we can
	 * receive max size packets.  We may want a module parameter to
	 * specify 2KB or 4KB and/or make be per port instead of per device
	 * for those who want to reduce memory footprint.  Note that the
	 * ipath_rcvhdrentsize size must be large enough to hold the largest
	 * IB header (currently 96 bytes) that we expect to handle (plus of
	 * course the 2 dwords of RHF).
	 */
	if (egrsize == 2048)
		dd->ipath_tidtemplate = 1U << 29;
	else if (egrsize == 4096)
		dd->ipath_tidtemplate = 2U << 29;
	else {
		egrsize = 4096;
		dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize "
			 "%u, using %u\n", dd->ipath_rcvegrbufsize,
			 egrsize);
		dd->ipath_tidtemplate = 2U << 29;
	}
	dd->ipath_tidinvalid = 0;
}

static int ipath_pe_early_init(struct ipath_devdata *dd)
{
	dd->ipath_flags |= IPATH_4BYTE_TID;

	/*
	 * For openib, we need to be able to handle an IB header of 96 bytes
	 * or 24 dwords.  HT-400 has arbitrary sized receive buffers, so we
	 * made them the same size as the PIO buffers.  The PE-800 does not
	 * handle arbitrary size buffers, so we need the header large enough
	 * to handle largest IB header, but still have room for a 2KB MTU
	 * standard IB packet.
	 */
	dd->ipath_rcvhdrentsize = 24;
	dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;

	/* For HT-400, we allocate a somewhat overly large eager buffer,
	 * such that we can guarantee that we can receive the largest packet
	 * that we can send out.  To truly support a 4KB MTU, we need to
	 * bump this to a larger value.  We'll do this when I get around to
	 * testing 4KB sends on the PE-800, which I have not yet done.
	 */
	dd->ipath_rcvegrbufsize = 2048;
	/*
	 * the min() check here is currently a nop, but it may not always
	 * be, depending on just how we do ipath_rcvegrbufsize
	 */
	dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
				 dd->ipath_rcvegrbufsize +
				 (dd->ipath_rcvhdrentsize << 2));
	dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;

	/*
	 * For PE-800, we can request a receive interrupt for 1 or
	 * more packets from current offset.  For now, we set this
	 * up for a single packet, to match the HT-400 behavior.
	 */
	dd->ipath_rhdrhead_intr_off = 1ULL<<32;

1183 1184
	ipath_get_eeprom_info(dd);

1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
	return 0;
}

int __attribute__((weak)) ipath_unordered_wc(void)
{
	return 0;
}

/**
 * ipath_init_pe_get_base_info - set chip-specific flags for user code
 * @dd: the infinipath device
 * @kbase: ipath_base_info pointer
 *
 * We set the PCIE flag because the lower bandwidth on PCIe vs
 * HyperTransport can affect some user packet algorithims.
 */
static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
{
	struct ipath_base_info *kinfo = kbase;

	if (ipath_unordered_wc()) {
		kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
		ipath_cdbg(PROC, "Intel processor, forcing WC order\n");
	}
	else
		ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");

	kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE;

	return 0;
}

/**
 * ipath_init_pe800_funcs - set up the chip-specific function pointers
 * @dd: the infinipath device
 *
 * This is global, and is called directly at init to set up the
 * chip-specific function pointers for later use.
 */
void ipath_init_pe800_funcs(struct ipath_devdata *dd)
{
	dd->ipath_f_intrsetup = ipath_pe_intconfig;
	dd->ipath_f_bus = ipath_setup_pe_config;
	dd->ipath_f_reset = ipath_setup_pe_reset;
	dd->ipath_f_get_boardname = ipath_pe_boardname;
	dd->ipath_f_init_hwerrors = ipath_pe_init_hwerrors;
	dd->ipath_f_early_init = ipath_pe_early_init;
	dd->ipath_f_handle_hwerrors = ipath_pe_handle_hwerrors;
	dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
	dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
	dd->ipath_f_clear_tids = ipath_pe_clear_tids;
	dd->ipath_f_put_tid = ipath_pe_put_tid;
	dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
	dd->ipath_f_setextled = ipath_setup_pe_setextled;
	dd->ipath_f_get_base_info = ipath_pe_get_base_info;

	/* initialize chip-specific variables */
	dd->ipath_f_tidtemplate = ipath_pe_tidtemplate;

	/*
	 * setup the register offsets, since they are different for each
	 * chip
	 */
	dd->ipath_kregs = &ipath_pe_kregs;
	dd->ipath_cregs = &ipath_pe_cregs;

	ipath_init_pe_variables();
}