ipath_iba6120.c

linux内核源码

/*
 * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
 * 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 PCIe chip.
 */

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


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

static void ipath_setup_pe_setextled(struct ipath_devdata *, u64, u64);

/*
 * This file contains all the chip-specific register information and
 * access functions for the QLogic InfiniPath PCI-Express chip.
 *
 * This lists the InfiniPath 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_write_kreg64(),
	 * use them with ipath_write_kreg64_port(),
	 */
	.kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
	.kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0),

	/* 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 ((1U<<5)-1)
#define INFINIPATH_I_RCVAVAIL_MASK ((1U<<5)-1)

/* 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))

/* 6120 specific hardware errors... */
static const struct ipath_hwerror_msgs ipath_6120_hwerror_msgs[] = {
	INFINIPATH_HWE_MSG(PCIEPOISONEDTLP, "PCIe Poisoned TLP"),
	INFINIPATH_HWE_MSG(PCIECPLTIMEOUT, "PCIe completion timeout"),
	/*
	 * 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.
	 */
	INFINIPATH_HWE_MSG(PCIE1PLLFAILED, "PCIePLL1"),
	INFINIPATH_HWE_MSG(PCIE0PLLFAILED, "PCIePLL0"),
	INFINIPATH_HWE_MSG(PCIEBUSPARITYXTLH, "PCIe XTLH core parity"),
	INFINIPATH_HWE_MSG(PCIEBUSPARITYXADM, "PCIe ADM TX core parity"),
	INFINIPATH_HWE_MSG(PCIEBUSPARITYRADM, "PCIe ADM RX core parity"),
	INFINIPATH_HWE_MSG(RXDSYNCMEMPARITYERR, "Rx Dsync"),
	INFINIPATH_HWE_MSG(SERDESPLLFAILED, "SerDes PLL"),
};

#define TXE_PIO_PARITY ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF | \
		        INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC) \
		        << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)

static int ipath_pe_txe_recover(struct ipath_devdata *);
static void ipath_pe_put_tid_2(struct ipath_devdata *, u64 __iomem *,
			       u32, unsigned long);

/**
 * 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.
 */
static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
				     size_t msgl)
{
	ipath_err_t hwerrs;
	u32 bits, ctrl;
	int isfatal = 0;
	char bitsmsg[64];
	int log_idx;

	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");