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Subject[PATCH 4 of 16] ipath - support for PCI Express devices
Date
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This file contains routines and definitions specific to InfiniPath
devices that have PCI Express interfaces.

Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>

diff -r ce67993a1036 -r 03623a9f4209 drivers/infiniband/hw/ipath/ipath_pe800.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/infiniband/hw/ipath/ipath_pe800.c Wed Mar 29 15:21:26 2006 -0800
@@ -0,0 +1,1247 @@
+/*
+ * 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.
+ */
+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];
+
+ 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
+ */
+void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
+{
+ 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
+ */
+int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
+{
+ 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
+ */
+void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
+{
+ 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);
+ 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);
+ 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;
+
+ 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();
+}
+
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