drivers/infiniband/hw/ipath/ipath_iba6120.c

   1 /*
   2  * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
   3  * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33 /*
  34  * This file contains all of the code that is specific to the
  35  * InfiniPath PCIe chip.
  36  */
  37
  38 #include <linux/interrupt.h>
  39 #include <linux/pci.h>
  40 #include <linux/delay.h>
  41 #include <rdma/ib_verbs.h>
  42
  43 #include "ipath_kernel.h"
  44 #include "ipath_registers.h"
  45
  46 static void ipath_setup_pe_setextled(struct ipath_devdata *, u64, u64);
  47
  48 /*
  49  * This file contains all the chip-specific register information and
  50  * access functions for the QLogic InfiniPath PCI-Express chip.
  51  *
  52  * This lists the InfiniPath registers, in the actual chip layout.
  53  * This structure should never be directly accessed.
  54  */
  55 struct _infinipath_do_not_use_kernel_regs {
  56         unsigned long long Revision;
  57         unsigned long long Control;
  58         unsigned long long PageAlign;
  59         unsigned long long PortCnt;
  60         unsigned long long DebugPortSelect;
  61         unsigned long long Reserved0;
  62         unsigned long long SendRegBase;
  63         unsigned long long UserRegBase;
  64         unsigned long long CounterRegBase;
  65         unsigned long long Scratch;
  66         unsigned long long Reserved1;
  67         unsigned long long Reserved2;
  68         unsigned long long IntBlocked;
  69         unsigned long long IntMask;
  70         unsigned long long IntStatus;
  71         unsigned long long IntClear;
  72         unsigned long long ErrorMask;
  73         unsigned long long ErrorStatus;
  74         unsigned long long ErrorClear;
  75         unsigned long long HwErrMask;
  76         unsigned long long HwErrStatus;
  77         unsigned long long HwErrClear;
  78         unsigned long long HwDiagCtrl;
  79         unsigned long long MDIO;
  80         unsigned long long IBCStatus;
  81         unsigned long long IBCCtrl;
  82         unsigned long long ExtStatus;
  83         unsigned long long ExtCtrl;
  84         unsigned long long GPIOOut;
  85         unsigned long long GPIOMask;
  86         unsigned long long GPIOStatus;
  87         unsigned long long GPIOClear;
  88         unsigned long long RcvCtrl;
  89         unsigned long long RcvBTHQP;
  90         unsigned long long RcvHdrSize;
  91         unsigned long long RcvHdrCnt;
  92         unsigned long long RcvHdrEntSize;
  93         unsigned long long RcvTIDBase;
  94         unsigned long long RcvTIDCnt;
  95         unsigned long long RcvEgrBase;
  96         unsigned long long RcvEgrCnt;
  97         unsigned long long RcvBufBase;
  98         unsigned long long RcvBufSize;
  99         unsigned long long RxIntMemBase;
 100         unsigned long long RxIntMemSize;
 101         unsigned long long RcvPartitionKey;
 102         unsigned long long Reserved3;
 103         unsigned long long RcvPktLEDCnt;
 104         unsigned long long Reserved4[8];
 105         unsigned long long SendCtrl;
 106         unsigned long long SendPIOBufBase;
 107         unsigned long long SendPIOSize;
 108         unsigned long long SendPIOBufCnt;
 109         unsigned long long SendPIOAvailAddr;
 110         unsigned long long TxIntMemBase;
 111         unsigned long long TxIntMemSize;
 112         unsigned long long Reserved5;
 113         unsigned long long PCIeRBufTestReg0;
 114         unsigned long long PCIeRBufTestReg1;
 115         unsigned long long Reserved51[6];
 116         unsigned long long SendBufferError;
 117         unsigned long long SendBufferErrorCONT1;
 118         unsigned long long Reserved6SBE[6];
 119         unsigned long long RcvHdrAddr0;
 120         unsigned long long RcvHdrAddr1;
 121         unsigned long long RcvHdrAddr2;
 122         unsigned long long RcvHdrAddr3;
 123         unsigned long long RcvHdrAddr4;
 124         unsigned long long Reserved7RHA[11];
 125         unsigned long long RcvHdrTailAddr0;
 126         unsigned long long RcvHdrTailAddr1;
 127         unsigned long long RcvHdrTailAddr2;
 128         unsigned long long RcvHdrTailAddr3;
 129         unsigned long long RcvHdrTailAddr4;
 130         unsigned long long Reserved8RHTA[11];
 131         unsigned long long Reserved9SW[8];
 132         unsigned long long SerdesConfig0;
 133         unsigned long long SerdesConfig1;
 134         unsigned long long SerdesStatus;
 135         unsigned long long XGXSConfig;
 136         unsigned long long IBPLLCfg;
 137         unsigned long long Reserved10SW2[3];
 138         unsigned long long PCIEQ0SerdesConfig0;
 139         unsigned long long PCIEQ0SerdesConfig1;
 140         unsigned long long PCIEQ0SerdesStatus;
 141         unsigned long long Reserved11;
 142         unsigned long long PCIEQ1SerdesConfig0;
 143         unsigned long long PCIEQ1SerdesConfig1;
 144         unsigned long long PCIEQ1SerdesStatus;
 145         unsigned long long Reserved12;
 146 };
 147
 148 struct _infinipath_do_not_use_counters {
 149         __u64 LBIntCnt;
 150         __u64 LBFlowStallCnt;
 151         __u64 Reserved1;
 152         __u64 TxUnsupVLErrCnt;
 153         __u64 TxDataPktCnt;
 154         __u64 TxFlowPktCnt;
 155         __u64 TxDwordCnt;
 156         __u64 TxLenErrCnt;
 157         __u64 TxMaxMinLenErrCnt;
 158         __u64 TxUnderrunCnt;
 159         __u64 TxFlowStallCnt;
 160         __u64 TxDroppedPktCnt;
 161         __u64 RxDroppedPktCnt;
 162         __u64 RxDataPktCnt;
 163         __u64 RxFlowPktCnt;
 164         __u64 RxDwordCnt;
 165         __u64 RxLenErrCnt;
 166         __u64 RxMaxMinLenErrCnt;
 167         __u64 RxICRCErrCnt;
 168         __u64 RxVCRCErrCnt;
 169         __u64 RxFlowCtrlErrCnt;
 170         __u64 RxBadFormatCnt;
 171         __u64 RxLinkProblemCnt;
 172         __u64 RxEBPCnt;
 173         __u64 RxLPCRCErrCnt;
 174         __u64 RxBufOvflCnt;
 175         __u64 RxTIDFullErrCnt;
 176         __u64 RxTIDValidErrCnt;
 177         __u64 RxPKeyMismatchCnt;
 178         __u64 RxP0HdrEgrOvflCnt;
 179         __u64 RxP1HdrEgrOvflCnt;
 180         __u64 RxP2HdrEgrOvflCnt;
 181         __u64 RxP3HdrEgrOvflCnt;
 182         __u64 RxP4HdrEgrOvflCnt;
 183         __u64 RxP5HdrEgrOvflCnt;
 184         __u64 RxP6HdrEgrOvflCnt;
 185         __u64 RxP7HdrEgrOvflCnt;
 186         __u64 RxP8HdrEgrOvflCnt;
 187         __u64 Reserved6;
 188         __u64 Reserved7;
 189         __u64 IBStatusChangeCnt;
 190         __u64 IBLinkErrRecoveryCnt;
 191         __u64 IBLinkDownedCnt;
 192         __u64 IBSymbolErrCnt;
 193 };
 194
 195 #define IPATH_KREG_OFFSET(field) (offsetof( \
 196         struct _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
 197 #define IPATH_CREG_OFFSET(field) (offsetof( \
 198         struct _infinipath_do_not_use_counters, field) / sizeof(u64))
 199
 200 static const struct ipath_kregs ipath_pe_kregs = {
 201         .kr_control = IPATH_KREG_OFFSET(Control),
 202         .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
 203         .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
 204         .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
 205         .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
 206         .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
 207         .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
 208         .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
 209         .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
 210         .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
 211         .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
 212         .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
 213         .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
 214         .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
 215         .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
 216         .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
 217         .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
 218         .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
 219         .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
 220         .kr_intclear = IPATH_KREG_OFFSET(IntClear),
 221         .kr_intmask = IPATH_KREG_OFFSET(IntMask),
 222         .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
 223         .kr_mdio = IPATH_KREG_OFFSET(MDIO),
 224         .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
 225         .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
 226         .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
 227         .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
 228         .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
 229         .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
 230         .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
 231         .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
 232         .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
 233         .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
 234         .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
 235         .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
 236         .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
 237         .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
 238         .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
 239         .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
 240         .kr_revision = IPATH_KREG_OFFSET(Revision),
 241         .kr_scratch = IPATH_KREG_OFFSET(Scratch),
 242         .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
 243         .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
 244         .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
 245         .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
 246         .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
 247         .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
 248         .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
 249         .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
 250         .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
 251         .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
 252         .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
 253         .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
 254         .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
 255         .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
 256         .kr_ibpllcfg = IPATH_KREG_OFFSET(IBPLLCfg),
 257
 258         /*
 259          * These should not be used directly via ipath_write_kreg64(),
 260          * use them with ipath_write_kreg64_port(),
 261          */
 262         .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
 263         .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0),
 264
 265         /* The rcvpktled register controls one of the debug port signals, so
 266          * a packet activity LED can be connected to it. */
 267         .kr_rcvpktledcnt = IPATH_KREG_OFFSET(RcvPktLEDCnt),
 268         .kr_pcierbuftestreg0 = IPATH_KREG_OFFSET(PCIeRBufTestReg0),
 269         .kr_pcierbuftestreg1 = IPATH_KREG_OFFSET(PCIeRBufTestReg1),
 270         .kr_pcieq0serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig0),
 271         .kr_pcieq0serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig1),
 272         .kr_pcieq0serdesstatus = IPATH_KREG_OFFSET(PCIEQ0SerdesStatus),
 273         .kr_pcieq1serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig0),
 274         .kr_pcieq1serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig1),
 275         .kr_pcieq1serdesstatus = IPATH_KREG_OFFSET(PCIEQ1SerdesStatus)
 276 };
 277
 278 static const struct ipath_cregs ipath_pe_cregs = {
 279         .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
 280         .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
 281         .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
 282         .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
 283         .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
 284         .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
 285         .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
 286         .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
 287         .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
 288         .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
 289         .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
 290         .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
 291         .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
 292         .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
 293         .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
 294         .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
 295         .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
 296         .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
 297         .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
 298         .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
 299         .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
 300         .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
 301         .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
 302         .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
 303         .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
 304         .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
 305         .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
 306         .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
 307         .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
 308         .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
 309         .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
 310         .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
 311         .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
 312 };
 313
 314 /* kr_control bits */
 315 #define INFINIPATH_C_RESET 1U
 316
 317 /* kr_intstatus, kr_intclear, kr_intmask bits */
 318 #define INFINIPATH_I_RCVURG_MASK ((1U<<5)-1)
 319 #define INFINIPATH_I_RCVURG_SHIFT 0
 320 #define INFINIPATH_I_RCVAVAIL_MASK ((1U<<5)-1)
 321 #define INFINIPATH_I_RCVAVAIL_SHIFT 12
 322
 323 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 324 #define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK  0x000000000000003fULL
 325 #define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
 326 #define INFINIPATH_HWE_PCIEPOISONEDTLP      0x0000000010000000ULL
 327 #define INFINIPATH_HWE_PCIECPLTIMEOUT       0x0000000020000000ULL
 328 #define INFINIPATH_HWE_PCIEBUSPARITYXTLH    0x0000000040000000ULL
 329 #define INFINIPATH_HWE_PCIEBUSPARITYXADM    0x0000000080000000ULL
 330 #define INFINIPATH_HWE_PCIEBUSPARITYRADM    0x0000000100000000ULL
 331 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 332 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 333 #define INFINIPATH_HWE_PCIE1PLLFAILED       0x0400000000000000ULL
 334 #define INFINIPATH_HWE_PCIE0PLLFAILED       0x0800000000000000ULL
 335 #define INFINIPATH_HWE_SERDESPLLFAILED      0x1000000000000000ULL
 336
 337 #define IBA6120_IBCS_LINKTRAININGSTATE_MASK 0xf
 338 #define IBA6120_IBCS_LINKSTATE_SHIFT 4
 339
 340 /* kr_extstatus bits */
 341 #define INFINIPATH_EXTS_FREQSEL 0x2
 342 #define INFINIPATH_EXTS_SERDESSEL 0x4
 343 #define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 344 #define INFINIPATH_EXTS_MEMBIST_FOUND       0x0000000000008000
 345
 346 /* kr_xgxsconfig bits */
 347 #define INFINIPATH_XGXS_RESET          0x5ULL
 348
 349 #define _IPATH_GPIO_SDA_NUM 1
 350 #define _IPATH_GPIO_SCL_NUM 0
 351
 352 #define IPATH_GPIO_SDA (1ULL << \
 353         (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 354 #define IPATH_GPIO_SCL (1ULL << \
 355         (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 356
 357 #define INFINIPATH_RT_BUFSIZE_MASK 0xe0000000ULL
 358 #define INFINIPATH_RT_BUFSIZE_SHIFTVAL(tid) \
 359         ((((tid) & INFINIPATH_RT_BUFSIZE_MASK) >> 29) + 11 - 1)
 360 #define INFINIPATH_RT_BUFSIZE(tid) (1 << INFINIPATH_RT_BUFSIZE_SHIFTVAL(tid))
 361 #define INFINIPATH_RT_IS_VALID(tid) \
 362         (((tid) & INFINIPATH_RT_BUFSIZE_MASK) && \
 363          ((((tid) & INFINIPATH_RT_BUFSIZE_MASK) != INFINIPATH_RT_BUFSIZE_MASK)))
 364 #define INFINIPATH_RT_ADDR_MASK 0x1FFFFFFFULL /* 29 bits valid */
 365 #define INFINIPATH_RT_ADDR_SHIFT 10
 366
 367 #define INFINIPATH_R_INTRAVAIL_SHIFT 16
 368 #define INFINIPATH_R_TAILUPD_SHIFT 31
 369
 370 /* 6120 specific hardware errors... */
 371 static const struct ipath_hwerror_msgs ipath_6120_hwerror_msgs[] = {
 372         INFINIPATH_HWE_MSG(PCIEPOISONEDTLP, "PCIe Poisoned TLP"),
 373         INFINIPATH_HWE_MSG(PCIECPLTIMEOUT, "PCIe completion timeout"),
 374         /*
 375          * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
 376          * parity or memory parity error failures, because most likely we
 377          * won't be able to talk to the core of the chip.  Nonetheless, we
 378          * might see them, if they are in parts of the PCIe core that aren't
 379          * essential.
 380          */
 381         INFINIPATH_HWE_MSG(PCIE1PLLFAILED, "PCIePLL1"),
 382         INFINIPATH_HWE_MSG(PCIE0PLLFAILED, "PCIePLL0"),
 383         INFINIPATH_HWE_MSG(PCIEBUSPARITYXTLH, "PCIe XTLH core parity"),
 384         INFINIPATH_HWE_MSG(PCIEBUSPARITYXADM, "PCIe ADM TX core parity"),
 385         INFINIPATH_HWE_MSG(PCIEBUSPARITYRADM, "PCIe ADM RX core parity"),
 386         INFINIPATH_HWE_MSG(RXDSYNCMEMPARITYERR, "Rx Dsync"),
 387         INFINIPATH_HWE_MSG(SERDESPLLFAILED, "SerDes PLL"),
 388 };
 389
 390 #define TXE_PIO_PARITY ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF | \
 391                         INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC) \
 392                         << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)
 393 #define RXE_EAGER_PARITY (INFINIPATH_HWE_RXEMEMPARITYERR_EAGERTID \
 394                           << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)
 395
 396 static void ipath_pe_put_tid_2(struct ipath_devdata *, u64 __iomem *,
 397                                u32, unsigned long);
 398
 399 /*
 400  * On platforms using this chip, and not having ordered WC stores, we
 401  * can get TXE parity errors due to speculative reads to the PIO buffers,
 402  * and this, due to a chip bug can result in (many) false parity error
 403  * reports.  So it's a debug print on those, and an info print on systems
 404  * where the speculative reads don't occur.
 405  */
 406 static void ipath_pe_txe_recover(struct ipath_devdata *dd)
 407 {
 408         if (ipath_unordered_wc())
 409                 ipath_dbg("Recovering from TXE PIO parity error\n");
 410         else {
 411                 ++ipath_stats.sps_txeparity;
 412                 dev_info(&dd->pcidev->dev,
 413                         "Recovering from TXE PIO parity error\n");
 414         }
 415 }
 416
 417
 418 /**
 419  * ipath_pe_handle_hwerrors - display hardware errors.
 420  * @dd: the infinipath device
 421  * @msg: the output buffer
 422  * @msgl: the size of the output buffer
 423  *
 424  * Use same msg buffer as regular errors to avoid excessive stack
 425  * use.  Most hardware errors are catastrophic, but for right now,
 426  * we'll print them and continue.  We reuse the same message buffer as
 427  * ipath_handle_errors() to avoid excessive stack usage.
 428  */
 429 static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 430                                      size_t msgl)
 431 {
 432         ipath_err_t hwerrs;
 433         u32 bits, ctrl;
 434         int isfatal = 0;
 435         char bitsmsg[64];
 436         int log_idx;
 437
 438         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 439         if (!hwerrs) {
 440                 /*
 441                  * better than printing cofusing messages
 442                  * This seems to be related to clearing the crc error, or
 443                  * the pll error during init.
 444                  */
 445                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 446                 return;
 447         } else if (hwerrs == ~0ULL) {
 448                 ipath_dev_err(dd, "Read of hardware error status failed "
 449                               "(all bits set); ignoring\n");
 450                 return;
 451         }
 452         ipath_stats.sps_hwerrs++;
 453
 454         /* Always clear the error status register, except MEMBISTFAIL,
 455          * regardless of whether we continue or stop using the chip.
 456          * We want that set so we know it failed, even across driver reload.
 457          * We'll still ignore it in the hwerrmask.  We do this partly for
 458          * diagnostics, but also for support */
 459         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 460                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 461
 462         hwerrs &= dd->ipath_hwerrmask;
 463
 464         /* We log some errors to EEPROM, check if we have any of those. */
 465         for (log_idx = 0; log_idx < IPATH_EEP_LOG_CNT; ++log_idx)
 466                 if (hwerrs & dd->ipath_eep_st_masks[log_idx].hwerrs_to_log)
 467                         ipath_inc_eeprom_err(dd, log_idx, 1);
 468
 469         /*
 470          * make sure we get this much out, unless told to be quiet,
 471          * or it's occurred within the last 5 seconds
 472          */
 473         if ((hwerrs & ~(dd->ipath_lasthwerror | TXE_PIO_PARITY |
 474                         RXE_EAGER_PARITY)) ||
 475             (ipath_debug & __IPATH_VERBDBG))
 476                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 477                          "(cleared)\n", (unsigned long long) hwerrs);
 478         dd->ipath_lasthwerror |= hwerrs;
 479
 480         if (hwerrs & ~dd->ipath_hwe_bitsextant)
 481                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 482                               "%llx set\n", (unsigned long long)
 483                               (hwerrs & ~dd->ipath_hwe_bitsextant));
 484
 485         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 486         if ((ctrl & INFINIPATH_C_FREEZEMODE) && !ipath_diag_inuse) {
 487                 /*
 488                  * parity errors in send memory are recoverable,
 489                  * just cancel the send (if indicated in * sendbuffererror),
 490                  * count the occurrence, unfreeze (if no other handled
 491                  * hardware error bits are set), and continue. They can
 492                  * occur if a processor speculative read is done to the PIO
 493                  * buffer while we are sending a packet, for example.
 494                  */
 495                 if (hwerrs & TXE_PIO_PARITY) {
 496                         ipath_pe_txe_recover(dd);
 497                         hwerrs &= ~TXE_PIO_PARITY;
 498                 }
 499                 if (!hwerrs) {
 500                         static u32 freeze_cnt;
 501
 502                         freeze_cnt++;
 503                         ipath_dbg("Clearing freezemode on ignored or recovered "
 504                                   "hardware error (%u)\n", freeze_cnt);
 505                         ipath_clear_freeze(dd);
 506                 }
 507         }
 508
 509         *msg = '\0';
 510
 511         if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
 512                 strlcat(msg, "[Memory BIST test failed, InfiniPath hardware unusable]",
 513                         msgl);
 514                 /* ignore from now on, so disable until driver reloaded */
 515                 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 516                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
 517                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 518                                  dd->ipath_hwerrmask);
 519         }
 520
 521         ipath_format_hwerrors(hwerrs,
 522                               ipath_6120_hwerror_msgs,
 523                               sizeof(ipath_6120_hwerror_msgs)/
 524                               sizeof(ipath_6120_hwerror_msgs[0]),
 525                               msg, msgl);
 526
 527         if (hwerrs & (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK
 528                       << INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT)) {
 529                 bits = (u32) ((hwerrs >>
 530                                INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) &
 531                               INFINIPATH_HWE_PCIEMEMPARITYERR_MASK);
 532                 snprintf(bitsmsg, sizeof bitsmsg,
 533                          "[PCIe Mem Parity Errs %x] ", bits);
 534                 strlcat(msg, bitsmsg, msgl);
 535         }
 536
 537 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |        \
 538                          INFINIPATH_HWE_COREPLL_RFSLIP )
 539
 540         if (hwerrs & _IPATH_PLL_FAIL) {
 541                 snprintf(bitsmsg, sizeof bitsmsg,
 542                          "[PLL failed (%llx), InfiniPath hardware unusable]",
 543                          (unsigned long long) hwerrs & _IPATH_PLL_FAIL);
 544                 strlcat(msg, bitsmsg, msgl);
 545                 /* ignore from now on, so disable until driver reloaded */
 546                 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
 547                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 548                                  dd->ipath_hwerrmask);
 549         }
 550
 551         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
 552                 /*
 553                  * If it occurs, it is left masked since the external
 554                  * interface is unused
 555                  */
 556                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 557                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 558                                  dd->ipath_hwerrmask);
 559         }
 560
 561         if (hwerrs) {
 562                 /*
 563                  * if any set that we aren't ignoring; only
 564                  * make the complaint once, in case it's stuck
 565                  * or recurring, and we get here multiple
 566                  * times.
 567                  */
 568                 ipath_dev_err(dd, "%s hardware error\n", msg);
 569                 if (dd->ipath_flags & IPATH_INITTED) {
 570                         ipath_set_linkstate(dd, IPATH_IB_LINKDOWN);
 571                         ipath_setup_pe_setextled(dd,
 572                                 INFINIPATH_IBCS_L_STATE_DOWN,
 573                                 INFINIPATH_IBCS_LT_STATE_DISABLED);
 574                         ipath_dev_err(dd, "Fatal Hardware Error (freeze "
 575                                           "mode), no longer usable, SN %.16s\n",
 576                                           dd->ipath_serial);
 577                         isfatal = 1;
 578                 }
 579                 *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
 580                 /* mark as having had error */
 581                 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 582                 /*
 583                  * mark as not usable, at a minimum until driver
 584                  * is reloaded, probably until reboot, since no
 585                  * other reset is possible.
 586                  */
 587                 dd->ipath_flags &= ~IPATH_INITTED;
 588         } else
 589                 *msg = 0; /* recovered from all of them */
 590
 591         if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg && msg) {
 592                 /*
 593                  * for /sys status file ; if no trailing brace is copied,
 594                  * we'll know it was truncated.
 595                  */
 596                 snprintf(dd->ipath_freezemsg, dd->ipath_freezelen,
 597                          "{%s}", msg);
 598         }
 599 }
 600
 601 /**
 602  * ipath_pe_boardname - fill in the board name
 603  * @dd: the infinipath device
 604  * @name: the output buffer
 605  * @namelen: the size of the output buffer
 606  *
 607  * info is based on the board revision register
 608  */
 609 static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
 610                               size_t namelen)
 611 {
 612         char *n = NULL;
 613         u8 boardrev = dd->ipath_boardrev;
 614         int ret;
 615
 616         switch (boardrev) {
 617         case 0:
 618                 n = "InfiniPath_Emulation";
 619                 break;
 620         case 1:
 621                 n = "InfiniPath_QLE7140-Bringup";
 622                 break;
 623         case 2:
 624                 n = "InfiniPath_QLE7140";
 625                 break;
 626         case 3:
 627                 n = "InfiniPath_QMI7140";
 628                 break;
 629         case 4:
 630                 n = "InfiniPath_QEM7140";
 631                 break;
 632         case 5:
 633                 n = "InfiniPath_QMH7140";
 634                 break;
 635         case 6:
 636                 n = "InfiniPath_QLE7142";
 637                 break;
 638         default:
 639                 ipath_dev_err(dd,
 640                               "Don't yet know about board with ID %u\n",
 641                               boardrev);
 642                 snprintf(name, namelen, "Unknown_InfiniPath_PCIe_%u",
 643                          boardrev);
 644                 break;
 645         }
 646         if (n)
 647                 snprintf(name, namelen, "%s", n);
 648
 649         if (dd->ipath_majrev != 4 || !dd->ipath_minrev || dd->ipath_minrev>2) {
 650                 ipath_dev_err(dd, "Unsupported InfiniPath hardware revision %u.%u!\n",
 651                               dd->ipath_majrev, dd->ipath_minrev);
 652                 ret = 1;
 653         } else {
 654                 ret = 0;
 655                 if (dd->ipath_minrev >= 2)
 656                         dd->ipath_f_put_tid = ipath_pe_put_tid_2;
 657         }
 658
 659         /*
 660          * set here, not in ipath_init_*_funcs because we have to do
 661          * it after we can read chip registers.
 662          */
 663         dd->ipath_ureg_align =
 664                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
 665
 666         return ret;
 667 }
 668
 669 /**
 670  * ipath_pe_init_hwerrors - enable hardware errors
 671  * @dd: the infinipath device
 672  *
 673  * now that we have finished initializing everything that might reasonably
 674  * cause a hardware error, and cleared those errors bits as they occur,
 675  * we can enable hardware errors in the mask (potentially enabling
 676  * freeze mode), and enable hardware errors as errors (along with
 677  * everything else) in errormask
 678  */
 679 static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
 680 {
 681         ipath_err_t val;
 682         u64 extsval;
 683
 684         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
 685
 686         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
 687                 ipath_dev_err(dd, "MemBIST did not complete!\n");
 688         if (extsval & INFINIPATH_EXTS_MEMBIST_FOUND)
 689                 ipath_dbg("MemBIST corrected\n");
 690
 691         val = ~0ULL;    /* barring bugs, all hwerrors become interrupts, */
 692
 693         if (!dd->ipath_boardrev)        // no PLL for Emulator
 694                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 695
 696         if (dd->ipath_minrev < 2) {
 697                 /* workaround bug 9460 in internal interface bus parity
 698                  * checking. Fixed (HW bug 9490) in Rev2.
 699                  */
 700                 val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
 701         }
 702         dd->ipath_hwerrmask = val;
 703 }
 704
 705 /**
 706  * ipath_pe_bringup_serdes - bring up the serdes
 707  * @dd: the infinipath device
 708  */
 709 static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
 710 {
 711         u64 val, config1, prev_val;
 712         int ret = 0;
 713
 714         ipath_dbg("Trying to bringup serdes\n");
 715
 716         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
 717             INFINIPATH_HWE_SERDESPLLFAILED) {
 718                 ipath_dbg("At start, serdes PLL failed bit set "
 719                           "in hwerrstatus, clearing and continuing\n");
 720                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 721                                  INFINIPATH_HWE_SERDESPLLFAILED);
 722         }
 723
 724         dd->ibdeltainprog = 1;
 725         dd->ibsymsnap =
 726              ipath_read_creg32(dd, dd->ipath_cregs->cr_ibsymbolerrcnt);
 727         dd->iblnkerrsnap =
 728              ipath_read_creg32(dd, dd->ipath_cregs->cr_iblinkerrrecovcnt);
 729
 730         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 731         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
 732
 733         ipath_cdbg(VERBOSE, "SerDes status config0=%llx config1=%llx, "
 734                    "xgxsconfig %llx\n", (unsigned long long) val,
 735                    (unsigned long long) config1, (unsigned long long)
 736                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 737
 738         /*
 739          * Force reset on, also set rxdetect enable.  Must do before reading
 740          * serdesstatus at least for simulation, or some of the bits in
 741          * serdes status will come back as undefined and cause simulation
 742          * failures
 743          */
 744         val |= INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RXDETECT_EN
 745                 | INFINIPATH_SERDC0_L1PWR_DN;
 746         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 747         /* be sure chip saw it */
 748         ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 749         udelay(5);              /* need pll reset set at least for a bit */
 750         /*
 751          * after PLL is reset, set the per-lane Resets and TxIdle and
 752          * clear the PLL reset and rxdetect (to get falling edge).
 753          * Leave L1PWR bits set (permanently)
 754          */
 755         val &= ~(INFINIPATH_SERDC0_RXDETECT_EN | INFINIPATH_SERDC0_RESET_PLL
 756                  | INFINIPATH_SERDC0_L1PWR_DN);
 757         val |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
 758         ipath_cdbg(VERBOSE, "Clearing pll reset and setting lane resets "
 759                    "and txidle (%llx)\n", (unsigned long long) val);
 760         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 761         /* be sure chip saw it */
 762         ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 763         /* need PLL reset clear for at least 11 usec before lane
 764          * resets cleared; give it a few more to be sure */
 765         udelay(15);
 766         val &= ~(INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE);
 767
 768         ipath_cdbg(VERBOSE, "Clearing lane resets and txidle "
 769                    "(writing %llx)\n", (unsigned long long) val);
 770         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 771         /* be sure chip saw it */
 772         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 773
 774         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
 775         prev_val = val;
 776         if (val & INFINIPATH_XGXS_RESET)
 777                 val &= ~INFINIPATH_XGXS_RESET;
 778         if (((val >> INFINIPATH_XGXS_RX_POL_SHIFT) &
 779              INFINIPATH_XGXS_RX_POL_MASK) != dd->ipath_rx_pol_inv ) {
 780                 /* need to compensate for Tx inversion in partner */
 781                 val &= ~(INFINIPATH_XGXS_RX_POL_MASK <<
 782                          INFINIPATH_XGXS_RX_POL_SHIFT);
 783                 val |= dd->ipath_rx_pol_inv <<
 784                         INFINIPATH_XGXS_RX_POL_SHIFT;
 785         }
 786         if (val != prev_val)
 787                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
 788
 789         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 790
 791         /* clear current and de-emphasis bits */
 792         config1 &= ~0x0ffffffff00ULL;
 793         /* set current to 20ma */
 794         config1 |= 0x00000000000ULL;
 795         /* set de-emphasis to -5.68dB */
 796         config1 |= 0x0cccc000000ULL;
 797         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
 798
 799         ipath_cdbg(VERBOSE, "done: SerDes status config0=%llx "
 800                    "config1=%llx, sstatus=%llx xgxs=%llx\n",
 801                    (unsigned long long) val, (unsigned long long) config1,
 802                    (unsigned long long)
 803                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
 804                    (unsigned long long)
 805                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 806
 807         return ret;
 808 }
 809
 810 /**
 811  * ipath_pe_quiet_serdes - set serdes to txidle
 812  * @dd: the infinipath device
 813  * Called when driver is being unloaded
 814  */
 815 static void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
 816 {
 817         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 818
 819         if (dd->ibsymdelta || dd->iblnkerrdelta ||
 820             dd->ibdeltainprog) {
 821                 u64 diagc;
 822                 /* enable counter writes */
 823                 diagc = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwdiagctrl);
 824                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwdiagctrl,
 825                                  diagc | INFINIPATH_DC_COUNTERWREN);
 826
 827                 if (dd->ibsymdelta || dd->ibdeltainprog) {
 828                         val = ipath_read_creg32(dd,
 829                                         dd->ipath_cregs->cr_ibsymbolerrcnt);
 830                         if (dd->ibdeltainprog)
 831                                 val -= val - dd->ibsymsnap;
 832                         val -= dd->ibsymdelta;
 833                         ipath_write_creg(dd,
 834                                   dd->ipath_cregs->cr_ibsymbolerrcnt, val);
 835                 }
 836                 if (dd->iblnkerrdelta || dd->ibdeltainprog) {
 837                         val = ipath_read_creg32(dd,
 838                                         dd->ipath_cregs->cr_iblinkerrrecovcnt);
 839                         if (dd->ibdeltainprog)
 840                                 val -= val - dd->iblnkerrsnap;
 841                         val -= dd->iblnkerrdelta;
 842                         ipath_write_creg(dd,
 843                                    dd->ipath_cregs->cr_iblinkerrrecovcnt, val);
 844              }
 845
 846              /* and disable counter writes */
 847              ipath_write_kreg(dd, dd->ipath_kregs->kr_hwdiagctrl, diagc);
 848         }
 849         val |= INFINIPATH_SERDC0_TXIDLE;
 850         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
 851                   (unsigned long long) val);
 852         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 853 }
 854
 855 static int ipath_pe_intconfig(struct ipath_devdata *dd)
 856 {
 857         u32 chiprev;
 858
 859         /*
 860          * If the chip supports added error indication via GPIO pins,
 861          * enable interrupts on those bits so the interrupt routine
 862          * can count the events. Also set flag so interrupt routine
 863          * can know they are expected.
 864          */
 865         chiprev = dd->ipath_revision >> INFINIPATH_R_CHIPREVMINOR_SHIFT;
 866         if ((chiprev & INFINIPATH_R_CHIPREVMINOR_MASK) > 1) {
 867                 /* Rev2+ reports extra errors via internal GPIO pins */
 868                 dd->ipath_flags |= IPATH_GPIO_ERRINTRS;
 869                 dd->ipath_gpio_mask |= IPATH_GPIO_ERRINTR_MASK;
 870                 ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
 871                                  dd->ipath_gpio_mask);
 872         }
 873         return 0;
 874 }
 875
 876 /**
 877  * ipath_setup_pe_setextled - set the state of the two external LEDs
 878  * @dd: the infinipath device
 879  * @lst: the L state
 880  * @ltst: the LT state
 881
 882  * These LEDs indicate the physical and logical state of IB link.
 883  * For this chip (at least with recommended board pinouts), LED1
 884  * is Yellow (logical state) and LED2 is Green (physical state),
 885  *
 886  * Note:  We try to match the Mellanox HCA LED behavior as best
 887  * we can.  Green indicates physical link state is OK (something is
 888  * plugged in, and we can train).
 889  * Amber indicates the link is logically up (ACTIVE).
 890  * Mellanox further blinks the amber LED to indicate data packet
 891  * activity, but we have no hardware support for that, so it would
 892  * require waking up every 10-20 msecs and checking the counters
 893  * on the chip, and then turning the LED off if appropriate.  That's
 894  * visible overhead, so not something we will do.
 895  *
 896  */
 897 static void ipath_setup_pe_setextled(struct ipath_devdata *dd, u64 lst,
 898                                      u64 ltst)
 899 {
 900         u64 extctl;
 901         unsigned long flags = 0;
 902
 903         /* the diags use the LED to indicate diag info, so we leave
 904          * the external LED alone when the diags are running */
 905         if (ipath_diag_inuse)
 906                 return;
 907
 908         /* Allow override of LED display for, e.g. Locating system in rack */
 909         if (dd->ipath_led_override) {
 910                 ltst = (dd->ipath_led_override & IPATH_LED_PHYS)
 911                         ? INFINIPATH_IBCS_LT_STATE_LINKUP
 912                         : INFINIPATH_IBCS_LT_STATE_DISABLED;
 913                 lst = (dd->ipath_led_override & IPATH_LED_LOG)
 914                         ? INFINIPATH_IBCS_L_STATE_ACTIVE
 915                         : INFINIPATH_IBCS_L_STATE_DOWN;
 916         }
 917
 918         spin_lock_irqsave(&dd->ipath_gpio_lock, flags);
 919         extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
 920                                        INFINIPATH_EXTC_LED2PRIPORT_ON);
 921
 922         if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
 923                 extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
 924         if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
 925                 extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
 926         dd->ipath_extctrl = extctl;
 927         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
 928         spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);
 929 }
 930
 931 /**
 932  * ipath_setup_pe_cleanup - clean up any per-chip chip-specific stuff
 933  * @dd: the infinipath device
 934  *
 935  * This is called during driver unload.
 936  * We do the pci_disable_msi here, not in generic code, because it
 937  * isn't used for the HT chips. If we do end up needing pci_enable_msi
 938  * at some point in the future for HT, we'll move the call back
 939  * into the main init_one code.
 940  */
 941 static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
 942 {
 943         dd->ipath_msi_lo = 0;   /* just in case unload fails */
 944         pci_disable_msi(dd->pcidev);
 945 }
 946
 947 static void ipath_6120_pcie_params(struct ipath_devdata *dd)
 948 {
 949         u16 linkstat, speed;
 950         int pos;
 951
 952         pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP);
 953         if (!pos) {
 954                 ipath_dev_err(dd, "Can't find PCI Express capability!\n");
 955                 goto bail;
 956         }
 957
 958         pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
 959                              &linkstat);
 960         /*
 961          * speed is bits 0-4, linkwidth is bits 4-8
 962          * no defines for them in headers
 963          */
 964         speed = linkstat & 0xf;
 965         linkstat >>= 4;
 966         linkstat &= 0x1f;
 967         dd->ipath_lbus_width = linkstat;
 968
 969         switch (speed) {
 970         case 1:
 971                 dd->ipath_lbus_speed = 2500; /* Gen1, 2.5GHz */
 972                 break;
 973         case 2:
 974                 dd->ipath_lbus_speed = 5000; /* Gen1, 5GHz */
 975                 break;
 976         default: /* not defined, assume gen1 */
 977                 dd->ipath_lbus_speed = 2500;
 978                 break;
 979         }
 980
 981         if (linkstat < 8)
 982                 ipath_dev_err(dd,
 983                         "PCIe width %u (x8 HCA), performance reduced\n",
 984                         linkstat);
 985         else
 986                 ipath_cdbg(VERBOSE, "PCIe speed %u width %u (x8 HCA)\n",
 987                         dd->ipath_lbus_speed, linkstat);
 988
 989         if (speed != 1)
 990                 ipath_dev_err(dd,
 991                         "PCIe linkspeed %u is incorrect; "
 992                         "should be 1 (2500)!\n", speed);
 993 bail:
 994         /* fill in string, even on errors */
 995         snprintf(dd->ipath_lbus_info, sizeof(dd->ipath_lbus_info),
 996                 "PCIe,%uMHz,x%u\n",
 997                 dd->ipath_lbus_speed,
 998                 dd->ipath_lbus_width);
 999
1000         return;
1001 }
1002
1003 /**
1004  * ipath_setup_pe_config - setup PCIe config related stuff
1005  * @dd: the infinipath device
1006  * @pdev: the PCI device
1007  *
1008  * The pci_enable_msi() call will fail on systems with MSI quirks
1009  * such as those with AMD8131, even if the device of interest is not
1010  * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
1011  * late in 2.6.16).
1012  * All that can be done is to edit the kernel source to remove the quirk
1013  * check until that is fixed.
1014  * We do not need to call enable_msi() for our HyperTransport chip,
1015  * even though it uses MSI, and we want to avoid the quirk warning, so
1016  * So we call enable_msi only for PCIe.  If we do end up needing
1017  * pci_enable_msi at some point in the future for HT, we'll move the
1018  * call back into the main init_one code.
1019  * We save the msi lo and hi values, so we can restore them after
1020  * chip reset (the kernel PCI infrastructure doesn't yet handle that
1021  * correctly).
1022  */
1023 static int ipath_setup_pe_config(struct ipath_devdata *dd,
1024                                  struct pci_dev *pdev)
1025 {
1026         int pos, ret;
1027
1028         dd->ipath_msi_lo = 0;   /* used as a flag during reset processing */
1029         ret = pci_enable_msi(dd->pcidev);
1030         if (ret)
1031                 ipath_dev_err(dd, "pci_enable_msi failed: %d, "
1032                               "interrupts may not work\n", ret);
1033         /* continue even if it fails, we may still be OK... */
1034         dd->ipath_irq = pdev->irq;
1035
1036         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
1037                 u16 control;
1038                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
1039                                       &dd->ipath_msi_lo);
1040                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
1041                                       &dd->ipath_msi_hi);
1042                 pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
1043                                      &control);
1044                 /* now save the data (vector) info */
1045                 pci_read_config_word(dd->pcidev,
1046                                      pos + ((control & PCI_MSI_FLAGS_64BIT)
1047                                             ? 12 : 8),
1048                                      &dd->ipath_msi_data);
1049                 ipath_cdbg(VERBOSE, "Read msi data 0x%x from config offset "
1050                            "0x%x, control=0x%x\n", dd->ipath_msi_data,
1051                            pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
1052                            control);
1053                 /* we save the cachelinesize also, although it doesn't
1054                  * really matter */
1055                 pci_read_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
1056                                      &dd->ipath_pci_cacheline);
1057         } else
1058                 ipath_dev_err(dd, "Can't find MSI capability, "
1059                               "can't save MSI settings for reset\n");
1060
1061         ipath_6120_pcie_params(dd);
1062
1063         dd->ipath_link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
1064         dd->ipath_link_speed_supported = IPATH_IB_SDR;
1065         dd->ipath_link_width_enabled = IB_WIDTH_4X;
1066         dd->ipath_link_speed_enabled = dd->ipath_link_speed_supported;
1067         /* these can't change for this chip, so set once */
1068         dd->ipath_link_width_active = dd->ipath_link_width_enabled;
1069         dd->ipath_link_speed_active = dd->ipath_link_speed_enabled;
1070         return 0;
1071 }
1072
1073 static void ipath_init_pe_variables(struct ipath_devdata *dd)
1074 {
1075         /*
1076          * setup the register offsets, since they are different for each
1077          * chip
1078          */
1079         dd->ipath_kregs = &ipath_pe_kregs;
1080         dd->ipath_cregs = &ipath_pe_cregs;
1081
1082         /*
1083          * bits for selecting i2c direction and values,
1084          * used for I2C serial flash
1085          */
1086         dd->ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
1087         dd->ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
1088         dd->ipath_gpio_sda = IPATH_GPIO_SDA;
1089         dd->ipath_gpio_scl = IPATH_GPIO_SCL;
1090
1091         /*
1092          * Fill in data for field-values that change in newer chips.
1093          * We dynamically specify only the mask for LINKTRAININGSTATE
1094          * and only the shift for LINKSTATE, as they are the only ones
1095          * that change.  Also precalculate the 3 link states of interest
1096          * and the combined mask.
1097          */
1098         dd->ibcs_ls_shift = IBA6120_IBCS_LINKSTATE_SHIFT;
1099         dd->ibcs_lts_mask = IBA6120_IBCS_LINKTRAININGSTATE_MASK;
1100         dd->ibcs_mask = (INFINIPATH_IBCS_LINKSTATE_MASK <<
1101                 dd->ibcs_ls_shift) | dd->ibcs_lts_mask;
1102         dd->ib_init = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1103                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1104                 (INFINIPATH_IBCS_L_STATE_INIT << dd->ibcs_ls_shift);
1105         dd->ib_arm = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1106                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1107                 (INFINIPATH_IBCS_L_STATE_ARM << dd->ibcs_ls_shift);
1108         dd->ib_active = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1109                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1110                 (INFINIPATH_IBCS_L_STATE_ACTIVE << dd->ibcs_ls_shift);
1111
1112         /*
1113          * Fill in data for ibcc field-values that change in newer chips.
1114          * We dynamically specify only the mask for LINKINITCMD
1115          * and only the shift for LINKCMD and MAXPKTLEN, as they are
1116          * the only ones that change.
1117          */
1118         dd->ibcc_lic_mask = INFINIPATH_IBCC_LINKINITCMD_MASK;
1119         dd->ibcc_lc_shift = INFINIPATH_IBCC_LINKCMD_SHIFT;
1120         dd->ibcc_mpl_shift = INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
1121
1122         /* Fill in shifts for RcvCtrl. */
1123         dd->ipath_r_portenable_shift = INFINIPATH_R_PORTENABLE_SHIFT;
1124         dd->ipath_r_intravail_shift = INFINIPATH_R_INTRAVAIL_SHIFT;
1125         dd->ipath_r_tailupd_shift = INFINIPATH_R_TAILUPD_SHIFT;
1126         dd->ipath_r_portcfg_shift = 0; /* Not on IBA6120 */
1127
1128         /* variables for sanity checking interrupt and errors */
1129         dd->ipath_hwe_bitsextant =
1130                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1131                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
1132                 (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1133                  INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
1134                 (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
1135                  INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
1136                 INFINIPATH_HWE_PCIE1PLLFAILED |
1137                 INFINIPATH_HWE_PCIE0PLLFAILED |
1138                 INFINIPATH_HWE_PCIEPOISONEDTLP |
1139                 INFINIPATH_HWE_PCIECPLTIMEOUT |
1140                 INFINIPATH_HWE_PCIEBUSPARITYXTLH |
1141                 INFINIPATH_HWE_PCIEBUSPARITYXADM |
1142                 INFINIPATH_HWE_PCIEBUSPARITYRADM |
1143                 INFINIPATH_HWE_MEMBISTFAILED |
1144                 INFINIPATH_HWE_COREPLL_FBSLIP |
1145                 INFINIPATH_HWE_COREPLL_RFSLIP |
1146                 INFINIPATH_HWE_SERDESPLLFAILED |
1147                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
1148                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
1149         dd->ipath_i_bitsextant =
1150                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
1151                 (INFINIPATH_I_RCVAVAIL_MASK <<
1152                  INFINIPATH_I_RCVAVAIL_SHIFT) |
1153                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
1154                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
1155         dd->ipath_e_bitsextant =
1156                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
1157                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
1158                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
1159                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
1160                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
1161                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
1162                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
1163                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
1164                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
1165                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
1166                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
1167                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
1168                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
1169                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
1170                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
1171                 INFINIPATH_E_HARDWARE;
1172
1173         dd->ipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
1174         dd->ipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
1175         dd->ipath_i_rcvavail_shift = INFINIPATH_I_RCVAVAIL_SHIFT;
1176         dd->ipath_i_rcvurg_shift = INFINIPATH_I_RCVURG_SHIFT;
1177
1178         /*
1179          * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
1180          * 2 is Some Misc, 3 is reserved for future.
1181          */
1182         dd->ipath_eep_st_masks[0].hwerrs_to_log =
1183                 INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1184                 INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT;
1185
1186         /* Ignore errors in PIO/PBC on systems with unordered write-combining */
1187         if (ipath_unordered_wc())
1188                 dd->ipath_eep_st_masks[0].hwerrs_to_log &= ~TXE_PIO_PARITY;
1189
1190         dd->ipath_eep_st_masks[1].hwerrs_to_log =
1191                 INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1192                 INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT;
1193
1194         dd->ipath_eep_st_masks[2].errs_to_log = INFINIPATH_E_RESET;
1195         dd->delay_mult = 2; /* SDR, 4X, can't change */
1196 }
1197
1198 /* setup the MSI stuff again after a reset.  I'd like to just call
1199  * pci_enable_msi() and request_irq() again, but when I do that,
1200  * the MSI enable bit doesn't get set in the command word, and
1201  * we switch to to a different interrupt vector, which is confusing,
1202  * so I instead just do it all inline.  Perhaps somehow can tie this
1203  * into the PCIe hotplug support at some point
1204  * Note, because I'm doing it all here, I don't call pci_disable_msi()
1205  * or free_irq() at the start of ipath_setup_pe_reset().
1206  */
1207 static int ipath_reinit_msi(struct ipath_devdata *dd)
1208 {
1209         int pos;
1210         u16 control;
1211         int ret;
1212
1213         if (!dd->ipath_msi_lo) {
1214                 dev_info(&dd->pcidev->dev, "Can't restore MSI config, "
1215                          "initial setup failed?\n");
1216                 ret = 0;
1217                 goto bail;
1218         }
1219
1220         if (!(pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
1221                 ipath_dev_err(dd, "Can't find MSI capability, "
1222                               "can't restore MSI settings\n");
1223                 ret = 0;
1224                 goto bail;
1225         }
1226         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1227                    dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
1228         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
1229                                dd->ipath_msi_lo);
1230         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1231                    dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
1232         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
1233                                dd->ipath_msi_hi);
1234         pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
1235         if (!(control & PCI_MSI_FLAGS_ENABLE)) {
1236                 ipath_cdbg(VERBOSE, "MSI control at off %x was %x, "
1237                            "setting MSI enable (%x)\n", pos + PCI_MSI_FLAGS,
1238                            control, control | PCI_MSI_FLAGS_ENABLE);
1239                 control |= PCI_MSI_FLAGS_ENABLE;
1240                 pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
1241                                       control);
1242         }
1243         /* now rewrite the data (vector) info */
1244         pci_write_config_word(dd->pcidev, pos +
1245                               ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
1246                               dd->ipath_msi_data);
1247         /* we restore the cachelinesize also, although it doesn't really
1248          * matter */
1249         pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
1250                               dd->ipath_pci_cacheline);
1251         /* and now set the pci master bit again */
1252         pci_set_master(dd->pcidev);
1253         ret = 1;
1254
1255 bail:
1256         return ret;
1257 }
1258
1259 /* This routine sleeps, so it can only be called from user context, not
1260  * from interrupt context.  If we need interrupt context, we can split
1261  * it into two routines.
1262 */
1263 static int ipath_setup_pe_reset(struct ipath_devdata *dd)
1264 {
1265         u64 val;
1266         int i;
1267         int ret;
1268         u16 cmdval;
1269
1270         pci_read_config_word(dd->pcidev, PCI_COMMAND, &cmdval);
1271
1272         /* Use ERROR so it shows up in logs, etc. */
1273         ipath_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->ipath_unit);
1274         /* keep chip from being accessed in a few places */
1275         dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT);
1276         val = dd->ipath_control | INFINIPATH_C_RESET;
1277         ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
1278         mb();
1279
1280         for (i = 1; i <= 5; i++) {
1281                 int r;
1282                 /* allow MBIST, etc. to complete; longer on each retry.
1283                  * We sometimes get machine checks from bus timeout if no
1284                  * response, so for now, make it *really* long.
1285                  */
1286                 msleep(1000 + (1 + i) * 2000);
1287                 if ((r =
1288                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
1289                                             dd->ipath_pcibar0)))
1290                         ipath_dev_err(dd, "rewrite of BAR0 failed: %d\n",
1291                                       r);
1292                 if ((r =
1293                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
1294                                             dd->ipath_pcibar1)))
1295                         ipath_dev_err(dd, "rewrite of BAR1 failed: %d\n",
1296                                       r);
1297                 /* now re-enable memory access */
1298                 pci_write_config_word(dd->pcidev, PCI_COMMAND, cmdval);
1299                 if ((r = pci_enable_device(dd->pcidev)))
1300                         ipath_dev_err(dd, "pci_enable_device failed after "
1301                                       "reset: %d\n", r);
1302                 /*
1303                  * whether it fully enabled or not, mark as present,
1304                  * again (but not INITTED)
1305                  */
1306                 dd->ipath_flags |= IPATH_PRESENT;
1307                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
1308                 if (val == dd->ipath_revision) {
1309                         ipath_cdbg(VERBOSE, "Got matching revision "
1310                                    "register %llx on try %d\n",
1311                                    (unsigned long long) val, i);
1312                         ret = ipath_reinit_msi(dd);
1313                         goto bail;
1314                 }
1315                 /* Probably getting -1 back */
1316                 ipath_dbg("Didn't get expected revision register, "
1317                           "got %llx, try %d\n", (unsigned long long) val,
1318                           i + 1);
1319         }
1320         ret = 0; /* failed */
1321
1322 bail:
1323         if (ret)
1324                 ipath_6120_pcie_params(dd);
1325         return ret;
1326 }
1327
1328 /**
1329  * ipath_pe_put_tid - write a TID in chip
1330  * @dd: the infinipath device
1331  * @tidptr: pointer to the expected TID (in chip) to udpate
1332  * @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0) for expected
1333  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1334  *
1335  * This exists as a separate routine to allow for special locking etc.
1336  * It's used for both the full cleanup on exit, as well as the normal
1337  * setup and teardown.
1338  */
1339 static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
1340                              u32 type, unsigned long pa)
1341 {
1342         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1343         unsigned long flags = 0; /* keep gcc quiet */
1344         int tidx;
1345         spinlock_t *tidlockp;
1346
1347         if (!dd->ipath_kregbase)
1348                 return;
1349
1350         if (pa != dd->ipath_tidinvalid) {
1351                 if (pa & ((1U << 11) - 1)) {
1352                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1353                                  "not 2KB aligned!\n", pa);
1354                         return;
1355                 }
1356                 pa >>= 11;
1357                 /* paranoia check */
1358                 if (pa & ~INFINIPATH_RT_ADDR_MASK)
1359                         ipath_dev_err(dd,
1360                                       "BUG: Physical page address 0x%lx "
1361                                       "has bits set in 31-29\n", pa);
1362
1363                 if (type == RCVHQ_RCV_TYPE_EAGER)
1364                         pa |= dd->ipath_tidtemplate;
1365                 else /* for now, always full 4KB page */
1366                         pa |= 2 << 29;
1367         }
1368
1369         /*
1370          * Workaround chip bug 9437 by writing the scratch register
1371          * before and after the TID, and with an io write barrier.
1372          * We use a spinlock around the writes, so they can't intermix
1373          * with other TID (eager or expected) writes (the chip bug
1374          * is triggered by back to back TID writes). Unfortunately, this
1375          * call can be done from interrupt level for the port 0 eager TIDs,
1376          * so we have to use irqsave locks.
1377          */
1378         /*
1379          * Assumes tidptr always > ipath_egrtidbase
1380          * if type == RCVHQ_RCV_TYPE_EAGER.
1381          */
1382         tidx = tidptr - dd->ipath_egrtidbase;
1383
1384         tidlockp = (type == RCVHQ_RCV_TYPE_EAGER && tidx < dd->ipath_rcvegrcnt)
1385                 ? &dd->ipath_kernel_tid_lock : &dd->ipath_user_tid_lock;
1386         spin_lock_irqsave(tidlockp, flags);
1387         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xfeeddeaf);
1388         writel(pa, tidp32);
1389         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xdeadbeef);
1390         mmiowb();
1391         spin_unlock_irqrestore(tidlockp, flags);
1392 }
1393
1394 /**
1395  * ipath_pe_put_tid_2 - write a TID in chip, Revision 2 or higher
1396  * @dd: the infinipath device
1397  * @tidptr: pointer to the expected TID (in chip) to udpate
1398  * @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0) for expected
1399  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1400  *
1401  * This exists as a separate routine to allow for selection of the
1402  * appropriate "flavor". The static calls in cleanup just use the
1403  * revision-agnostic form, as they are not performance critical.
1404  */
1405 static void ipath_pe_put_tid_2(struct ipath_devdata *dd, u64 __iomem *tidptr,
1406                              u32 type, unsigned long pa)
1407 {
1408         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1409         u32 tidx;
1410
1411         if (!dd->ipath_kregbase)
1412                 return;
1413
1414         if (pa != dd->ipath_tidinvalid) {
1415                 if (pa & ((1U << 11) - 1)) {
1416                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1417                                  "not 2KB aligned!\n", pa);
1418                         return;
1419                 }
1420                 pa >>= 11;
1421                 /* paranoia check */
1422                 if (pa & ~INFINIPATH_RT_ADDR_MASK)
1423                         ipath_dev_err(dd,
1424                                       "BUG: Physical page address 0x%lx "
1425                                       "has bits set in 31-29\n", pa);
1426
1427                 if (type == RCVHQ_RCV_TYPE_EAGER)
1428                         pa |= dd->ipath_tidtemplate;
1429                 else /* for now, always full 4KB page */
1430                         pa |= 2 << 29;
1431         }
1432         tidx = tidptr - dd->ipath_egrtidbase;
1433         writel(pa, tidp32);
1434         mmiowb();
1435 }
1436
1437
1438 /**
1439  * ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
1440  * @dd: the infinipath device
1441  * @port: the port
1442  *
1443  * clear all TID entries for a port, expected and eager.
1444  * Used from ipath_close().  On this chip, TIDs are only 32 bits,
1445  * not 64, but they are still on 64 bit boundaries, so tidbase
1446  * is declared as u64 * for the pointer math, even though we write 32 bits
1447  */
1448 static void ipath_pe_clear_tids(struct ipath_devdata *dd, unsigned port)
1449 {
1450         u64 __iomem *tidbase;
1451         unsigned long tidinv;
1452         int i;
1453
1454         if (!dd->ipath_kregbase)
1455                 return;
1456
1457         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1458
1459         tidinv = dd->ipath_tidinvalid;
1460         tidbase = (u64 __iomem *)
1461                 ((char __iomem *)(dd->ipath_kregbase) +
1462                  dd->ipath_rcvtidbase +
1463                  port * dd->ipath_rcvtidcnt * sizeof(*tidbase));
1464
1465         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1466                 dd->ipath_f_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
1467                                  tidinv);
1468
1469         tidbase = (u64 __iomem *)
1470                 ((char __iomem *)(dd->ipath_kregbase) +
1471                  dd->ipath_rcvegrbase +
1472                  port * dd->ipath_rcvegrcnt * sizeof(*tidbase));
1473
1474         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1475                 dd->ipath_f_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
1476                                  tidinv);
1477 }
1478
1479 /**
1480  * ipath_pe_tidtemplate - setup constants for TID updates
1481  * @dd: the infinipath device
1482  *
1483  * We setup stuff that we use a lot, to avoid calculating each time
1484  */
1485 static void ipath_pe_tidtemplate(struct ipath_devdata *dd)
1486 {
1487         u32 egrsize = dd->ipath_rcvegrbufsize;
1488
1489         /* For now, we always allocate 4KB buffers (at init) so we can
1490          * receive max size packets.  We may want a module parameter to
1491          * specify 2KB or 4KB and/or make be per port instead of per device
1492          * for those who want to reduce memory footprint.  Note that the
1493          * ipath_rcvhdrentsize size must be large enough to hold the largest
1494          * IB header (currently 96 bytes) that we expect to handle (plus of
1495          * course the 2 dwords of RHF).
1496          */
1497         if (egrsize == 2048)
1498                 dd->ipath_tidtemplate = 1U << 29;
1499         else if (egrsize == 4096)
1500                 dd->ipath_tidtemplate = 2U << 29;
1501         else {
1502                 egrsize = 4096;
1503                 dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize "
1504                          "%u, using %u\n", dd->ipath_rcvegrbufsize,
1505                          egrsize);
1506                 dd->ipath_tidtemplate = 2U << 29;
1507         }
1508         dd->ipath_tidinvalid = 0;
1509 }
1510
1511 static int ipath_pe_early_init(struct ipath_devdata *dd)
1512 {
1513         dd->ipath_flags |= IPATH_4BYTE_TID;
1514         if (ipath_unordered_wc())
1515                 dd->ipath_flags |= IPATH_PIO_FLUSH_WC;
1516
1517         /*
1518          * For openfabrics, we need to be able to handle an IB header of
1519          * 24 dwords.  HT chip has arbitrary sized receive buffers, so we
1520          * made them the same size as the PIO buffers.  This chip does not
1521          * handle arbitrary size buffers, so we need the header large enough
1522          * to handle largest IB header, but still have room for a 2KB MTU
1523          * standard IB packet.
1524          */
1525         dd->ipath_rcvhdrentsize = 24;
1526         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1527         dd->ipath_rhf_offset = 0;
1528         dd->ipath_egrtidbase = (u64 __iomem *)
1529                 ((char __iomem *) dd->ipath_kregbase + dd->ipath_rcvegrbase);
1530
1531         dd->ipath_rcvegrbufsize = ipath_mtu4096 ? 4096 : 2048;
1532         /*
1533          * the min() check here is currently a nop, but it may not always
1534          * be, depending on just how we do ipath_rcvegrbufsize
1535          */
1536         dd->ipath_ibmaxlen = min(ipath_mtu4096 ? dd->ipath_piosize4k :
1537                                  dd->ipath_piosize2k,
1538                                  dd->ipath_rcvegrbufsize +
1539                                  (dd->ipath_rcvhdrentsize << 2));
1540         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1541
1542         /*
1543          * We can request a receive interrupt for 1 or
1544          * more packets from current offset.  For now, we set this
1545          * up for a single packet.
1546          */
1547         dd->ipath_rhdrhead_intr_off = 1ULL<<32;
1548
1549         ipath_get_eeprom_info(dd);
1550
1551         return 0;
1552 }
1553
1554 int __attribute__((weak)) ipath_unordered_wc(void)
1555 {
1556         return 0;
1557 }
1558
1559 /**
1560  * ipath_init_pe_get_base_info - set chip-specific flags for user code
1561  * @pd: the infinipath port
1562  * @kbase: ipath_base_info pointer
1563  *
1564  * We set the PCIE flag because the lower bandwidth on PCIe vs
1565  * HyperTransport can affect some user packet algorithms.
1566  */
1567 static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
1568 {
1569         struct ipath_base_info *kinfo = kbase;
1570         struct ipath_devdata *dd;
1571
1572         if (ipath_unordered_wc()) {
1573                 kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
1574                 ipath_cdbg(PROC, "Intel processor, forcing WC order\n");
1575         }
1576         else
1577                 ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");
1578
1579         if (pd == NULL)
1580                 goto done;
1581
1582         dd = pd->port_dd;
1583
1584 done:
1585         kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE |
1586                 IPATH_RUNTIME_FORCE_PIOAVAIL | IPATH_RUNTIME_PIO_REGSWAPPED;
1587         return 0;
1588 }
1589
1590 static void ipath_pe_free_irq(struct ipath_devdata *dd)
1591 {
1592         free_irq(dd->ipath_irq, dd);
1593         dd->ipath_irq = 0;
1594 }
1595
1596
1597 static struct ipath_message_header *
1598 ipath_pe_get_msgheader(struct ipath_devdata *dd, __le32 *rhf_addr)
1599 {
1600         return (struct ipath_message_header *)
1601                 &rhf_addr[sizeof(u64) / sizeof(u32)];
1602 }
1603
1604 static void ipath_pe_config_ports(struct ipath_devdata *dd, ushort cfgports)
1605 {
1606         dd->ipath_portcnt =
1607                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
1608         dd->ipath_p0_rcvegrcnt =
1609                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
1610 }
1611
1612 static void ipath_pe_read_counters(struct ipath_devdata *dd,
1613                                    struct infinipath_counters *cntrs)
1614 {
1615         cntrs->LBIntCnt =
1616                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBIntCnt));
1617         cntrs->LBFlowStallCnt =
1618                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBFlowStallCnt));
1619         cntrs->TxSDmaDescCnt = 0;
1620         cntrs->TxUnsupVLErrCnt =
1621                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnsupVLErrCnt));
1622         cntrs->TxDataPktCnt =
1623                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDataPktCnt));
1624         cntrs->TxFlowPktCnt =
1625                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowPktCnt));
1626         cntrs->TxDwordCnt =
1627                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDwordCnt));
1628         cntrs->TxLenErrCnt =
1629                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxLenErrCnt));
1630         cntrs->TxMaxMinLenErrCnt =
1631                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxMaxMinLenErrCnt));
1632         cntrs->TxUnderrunCnt =
1633                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnderrunCnt));
1634         cntrs->TxFlowStallCnt =
1635                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowStallCnt));
1636         cntrs->TxDroppedPktCnt =
1637                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDroppedPktCnt));
1638         cntrs->RxDroppedPktCnt =
1639                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDroppedPktCnt));
1640         cntrs->RxDataPktCnt =
1641                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDataPktCnt));
1642         cntrs->RxFlowPktCnt =
1643                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowPktCnt));
1644         cntrs->RxDwordCnt =
1645                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDwordCnt));
1646         cntrs->RxLenErrCnt =
1647                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLenErrCnt));
1648         cntrs->RxMaxMinLenErrCnt =
1649                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxMaxMinLenErrCnt));
1650         cntrs->RxICRCErrCnt =
1651                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxICRCErrCnt));
1652         cntrs->RxVCRCErrCnt =
1653                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxVCRCErrCnt));
1654         cntrs->RxFlowCtrlErrCnt =
1655                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowCtrlErrCnt));
1656         cntrs->RxBadFormatCnt =
1657                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBadFormatCnt));
1658         cntrs->RxLinkProblemCnt =
1659                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLinkProblemCnt));
1660         cntrs->RxEBPCnt =
1661                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxEBPCnt));
1662         cntrs->RxLPCRCErrCnt =
1663                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLPCRCErrCnt));
1664         cntrs->RxBufOvflCnt =
1665                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBufOvflCnt));
1666         cntrs->RxTIDFullErrCnt =
1667                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDFullErrCnt));
1668         cntrs->RxTIDValidErrCnt =
1669                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDValidErrCnt));
1670         cntrs->RxPKeyMismatchCnt =
1671                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxPKeyMismatchCnt));
1672         cntrs->RxP0HdrEgrOvflCnt =
1673                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt));
1674         cntrs->RxP1HdrEgrOvflCnt =
1675                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP1HdrEgrOvflCnt));
1676         cntrs->RxP2HdrEgrOvflCnt =
1677                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP2HdrEgrOvflCnt));
1678         cntrs->RxP3HdrEgrOvflCnt =
1679                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP3HdrEgrOvflCnt));
1680         cntrs->RxP4HdrEgrOvflCnt =
1681                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP4HdrEgrOvflCnt));
1682         cntrs->RxP5HdrEgrOvflCnt = 0;
1683         cntrs->RxP6HdrEgrOvflCnt = 0;
1684         cntrs->RxP7HdrEgrOvflCnt = 0;
1685         cntrs->RxP8HdrEgrOvflCnt = 0;
1686         cntrs->RxP9HdrEgrOvflCnt = 0;
1687         cntrs->RxP10HdrEgrOvflCnt = 0;
1688         cntrs->RxP11HdrEgrOvflCnt = 0;
1689         cntrs->RxP12HdrEgrOvflCnt = 0;
1690         cntrs->RxP13HdrEgrOvflCnt = 0;
1691         cntrs->RxP14HdrEgrOvflCnt = 0;
1692         cntrs->RxP15HdrEgrOvflCnt = 0;
1693         cntrs->RxP16HdrEgrOvflCnt = 0;
1694         cntrs->IBStatusChangeCnt =
1695                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBStatusChangeCnt));
1696         cntrs->IBLinkErrRecoveryCnt =
1697                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt));
1698         cntrs->IBLinkDownedCnt =
1699                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkDownedCnt));
1700         cntrs->IBSymbolErrCnt =
1701                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBSymbolErrCnt));
1702         cntrs->RxVL15DroppedPktCnt = 0;
1703         cntrs->RxOtherLocalPhyErrCnt = 0;
1704         cntrs->PcieRetryBufDiagQwordCnt = 0;
1705         cntrs->ExcessBufferOvflCnt = dd->ipath_overrun_thresh_errs;
1706         cntrs->LocalLinkIntegrityErrCnt = dd->ipath_lli_errs;
1707         cntrs->RxVlErrCnt = 0;
1708         cntrs->RxDlidFltrCnt = 0;
1709 }
1710
1711
1712 /* no interrupt fallback for these chips */
1713 static int ipath_pe_nointr_fallback(struct ipath_devdata *dd)
1714 {
1715         return 0;
1716 }
1717
1718
1719 /*
1720  * reset the XGXS (between serdes and IBC).  Slightly less intrusive
1721  * than resetting the IBC or external link state, and useful in some
1722  * cases to cause some retraining.  To do this right, we reset IBC
1723  * as well.
1724  */
1725 static void ipath_pe_xgxs_reset(struct ipath_devdata *dd)
1726 {
1727         u64 val, prev_val;
1728
1729         prev_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1730         val = prev_val | INFINIPATH_XGXS_RESET;
1731         prev_val &= ~INFINIPATH_XGXS_RESET; /* be sure */
1732         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
1733                          dd->ipath_control & ~INFINIPATH_C_LINKENABLE);
1734         ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1735         ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1736         ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, prev_val);
1737         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
1738                          dd->ipath_control);
1739 }
1740
1741
1742 static int ipath_pe_get_ib_cfg(struct ipath_devdata *dd, int which)
1743 {
1744         int ret;
1745
1746         switch (which) {
1747         case IPATH_IB_CFG_LWID:
1748                 ret = dd->ipath_link_width_active;
1749                 break;
1750         case IPATH_IB_CFG_SPD:
1751                 ret = dd->ipath_link_speed_active;
1752                 break;
1753         case IPATH_IB_CFG_LWID_ENB:
1754                 ret = dd->ipath_link_width_enabled;
1755                 break;
1756         case IPATH_IB_CFG_SPD_ENB:
1757                 ret = dd->ipath_link_speed_enabled;
1758                 break;
1759         default:
1760                 ret =  -ENOTSUPP;
1761                 break;
1762         }
1763         return ret;
1764 }
1765
1766
1767 /* we assume range checking is already done, if needed */
1768 static int ipath_pe_set_ib_cfg(struct ipath_devdata *dd, int which, u32 val)
1769 {
1770         int ret = 0;
1771
1772         if (which == IPATH_IB_CFG_LWID_ENB)
1773                 dd->ipath_link_width_enabled = val;
1774         else if (which == IPATH_IB_CFG_SPD_ENB)
1775                 dd->ipath_link_speed_enabled = val;
1776         else
1777                 ret = -ENOTSUPP;
1778         return ret;
1779 }
1780
1781 static void ipath_pe_config_jint(struct ipath_devdata *dd, u16 a, u16 b)
1782 {
1783 }
1784
1785
1786 static int ipath_pe_ib_updown(struct ipath_devdata *dd, int ibup, u64 ibcs)
1787 {
1788         if (ibup) {
1789                 if (dd->ibdeltainprog) {
1790                         dd->ibdeltainprog = 0;
1791                         dd->ibsymdelta +=
1792                                 ipath_read_creg32(dd,
1793                                   dd->ipath_cregs->cr_ibsymbolerrcnt) -
1794                                 dd->ibsymsnap;
1795                         dd->iblnkerrdelta +=
1796                                 ipath_read_creg32(dd,
1797                                   dd->ipath_cregs->cr_iblinkerrrecovcnt) -
1798                                 dd->iblnkerrsnap;
1799                 }
1800         } else {
1801                 dd->ipath_lli_counter = 0;
1802                 if (!dd->ibdeltainprog) {
1803                         dd->ibdeltainprog = 1;
1804                         dd->ibsymsnap =
1805                                 ipath_read_creg32(dd,
1806                                   dd->ipath_cregs->cr_ibsymbolerrcnt);
1807                         dd->iblnkerrsnap =
1808                                 ipath_read_creg32(dd,
1809                                   dd->ipath_cregs->cr_iblinkerrrecovcnt);
1810                 }
1811         }
1812
1813         ipath_setup_pe_setextled(dd, ipath_ib_linkstate(dd, ibcs),
1814                 ipath_ib_linktrstate(dd, ibcs));
1815         return 0;
1816 }
1817
1818
1819 /**
1820  * ipath_init_iba6120_funcs - set up the chip-specific function pointers
1821  * @dd: the infinipath device
1822  *
1823  * This is global, and is called directly at init to set up the
1824  * chip-specific function pointers for later use.
1825  */
1826 void ipath_init_iba6120_funcs(struct ipath_devdata *dd)
1827 {
1828         dd->ipath_f_intrsetup = ipath_pe_intconfig;
1829         dd->ipath_f_bus = ipath_setup_pe_config;
1830         dd->ipath_f_reset = ipath_setup_pe_reset;
1831         dd->ipath_f_get_boardname = ipath_pe_boardname;
1832         dd->ipath_f_init_hwerrors = ipath_pe_init_hwerrors;
1833         dd->ipath_f_early_init = ipath_pe_early_init;
1834         dd->ipath_f_handle_hwerrors = ipath_pe_handle_hwerrors;
1835         dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
1836         dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
1837         dd->ipath_f_clear_tids = ipath_pe_clear_tids;
1838         /*
1839          * _f_put_tid may get changed after we read the chip revision,
1840          * but we start with the safe version for all revs
1841          */
1842         dd->ipath_f_put_tid = ipath_pe_put_tid;
1843         dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
1844         dd->ipath_f_setextled = ipath_setup_pe_setextled;
1845         dd->ipath_f_get_base_info = ipath_pe_get_base_info;
1846         dd->ipath_f_free_irq = ipath_pe_free_irq;
1847         dd->ipath_f_tidtemplate = ipath_pe_tidtemplate;
1848         dd->ipath_f_intr_fallback = ipath_pe_nointr_fallback;
1849         dd->ipath_f_xgxs_reset = ipath_pe_xgxs_reset;
1850         dd->ipath_f_get_msgheader = ipath_pe_get_msgheader;
1851         dd->ipath_f_config_ports = ipath_pe_config_ports;
1852         dd->ipath_f_read_counters = ipath_pe_read_counters;
1853         dd->ipath_f_get_ib_cfg = ipath_pe_get_ib_cfg;
1854         dd->ipath_f_set_ib_cfg = ipath_pe_set_ib_cfg;
1855         dd->ipath_f_config_jint = ipath_pe_config_jint;
1856         dd->ipath_f_ib_updown = ipath_pe_ib_updown;
1857
1858
1859         /* initialize chip-specific variables */
1860         ipath_init_pe_variables(dd);
1861 }
1862