drivers/infiniband/hw/ipath/ipath_pe800.c

   1 /*
   2  * Copyright (c) 2006 QLogic, Inc. 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 PE-800 chip.
  36  */
  37
  38 #include <linux/interrupt.h>
  39 #include <linux/pci.h>
  40 #include <linux/delay.h>
  41
  42
  43 #include "ipath_kernel.h"
  44 #include "ipath_registers.h"
  45
  46 /*
  47  * This file contains all the chip-specific register information and
  48  * access functions for the QLogic InfiniPath PE800, the PCI-Express chip.
  49  *
  50  * This lists the InfiniPath PE800 registers, in the actual chip layout.
  51  * This structure should never be directly accessed.
  52  */
  53 struct _infinipath_do_not_use_kernel_regs {
  54         unsigned long long Revision;
  55         unsigned long long Control;
  56         unsigned long long PageAlign;
  57         unsigned long long PortCnt;
  58         unsigned long long DebugPortSelect;
  59         unsigned long long Reserved0;
  60         unsigned long long SendRegBase;
  61         unsigned long long UserRegBase;
  62         unsigned long long CounterRegBase;
  63         unsigned long long Scratch;
  64         unsigned long long Reserved1;
  65         unsigned long long Reserved2;
  66         unsigned long long IntBlocked;
  67         unsigned long long IntMask;
  68         unsigned long long IntStatus;
  69         unsigned long long IntClear;
  70         unsigned long long ErrorMask;
  71         unsigned long long ErrorStatus;
  72         unsigned long long ErrorClear;
  73         unsigned long long HwErrMask;
  74         unsigned long long HwErrStatus;
  75         unsigned long long HwErrClear;
  76         unsigned long long HwDiagCtrl;
  77         unsigned long long MDIO;
  78         unsigned long long IBCStatus;
  79         unsigned long long IBCCtrl;
  80         unsigned long long ExtStatus;
  81         unsigned long long ExtCtrl;
  82         unsigned long long GPIOOut;
  83         unsigned long long GPIOMask;
  84         unsigned long long GPIOStatus;
  85         unsigned long long GPIOClear;
  86         unsigned long long RcvCtrl;
  87         unsigned long long RcvBTHQP;
  88         unsigned long long RcvHdrSize;
  89         unsigned long long RcvHdrCnt;
  90         unsigned long long RcvHdrEntSize;
  91         unsigned long long RcvTIDBase;
  92         unsigned long long RcvTIDCnt;
  93         unsigned long long RcvEgrBase;
  94         unsigned long long RcvEgrCnt;
  95         unsigned long long RcvBufBase;
  96         unsigned long long RcvBufSize;
  97         unsigned long long RxIntMemBase;
  98         unsigned long long RxIntMemSize;
  99         unsigned long long RcvPartitionKey;
 100         unsigned long long Reserved3;
 101         unsigned long long RcvPktLEDCnt;
 102         unsigned long long Reserved4[8];
 103         unsigned long long SendCtrl;
 104         unsigned long long SendPIOBufBase;
 105         unsigned long long SendPIOSize;
 106         unsigned long long SendPIOBufCnt;
 107         unsigned long long SendPIOAvailAddr;
 108         unsigned long long TxIntMemBase;
 109         unsigned long long TxIntMemSize;
 110         unsigned long long Reserved5;
 111         unsigned long long PCIeRBufTestReg0;
 112         unsigned long long PCIeRBufTestReg1;
 113         unsigned long long Reserved51[6];
 114         unsigned long long SendBufferError;
 115         unsigned long long SendBufferErrorCONT1;
 116         unsigned long long Reserved6SBE[6];
 117         unsigned long long RcvHdrAddr0;
 118         unsigned long long RcvHdrAddr1;
 119         unsigned long long RcvHdrAddr2;
 120         unsigned long long RcvHdrAddr3;
 121         unsigned long long RcvHdrAddr4;
 122         unsigned long long Reserved7RHA[11];
 123         unsigned long long RcvHdrTailAddr0;
 124         unsigned long long RcvHdrTailAddr1;
 125         unsigned long long RcvHdrTailAddr2;
 126         unsigned long long RcvHdrTailAddr3;
 127         unsigned long long RcvHdrTailAddr4;
 128         unsigned long long Reserved8RHTA[11];
 129         unsigned long long Reserved9SW[8];
 130         unsigned long long SerdesConfig0;
 131         unsigned long long SerdesConfig1;
 132         unsigned long long SerdesStatus;
 133         unsigned long long XGXSConfig;
 134         unsigned long long IBPLLCfg;
 135         unsigned long long Reserved10SW2[3];
 136         unsigned long long PCIEQ0SerdesConfig0;
 137         unsigned long long PCIEQ0SerdesConfig1;
 138         unsigned long long PCIEQ0SerdesStatus;
 139         unsigned long long Reserved11;
 140         unsigned long long PCIEQ1SerdesConfig0;
 141         unsigned long long PCIEQ1SerdesConfig1;
 142         unsigned long long PCIEQ1SerdesStatus;
 143         unsigned long long Reserved12;
 144 };
 145
 146 #define IPATH_KREG_OFFSET(field) (offsetof(struct \
 147     _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
 148 #define IPATH_CREG_OFFSET(field) (offsetof( \
 149     struct infinipath_counters, field) / sizeof(u64))
 150
 151 static const struct ipath_kregs ipath_pe_kregs = {
 152         .kr_control = IPATH_KREG_OFFSET(Control),
 153         .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
 154         .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
 155         .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
 156         .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
 157         .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
 158         .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
 159         .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
 160         .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
 161         .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
 162         .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
 163         .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
 164         .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
 165         .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
 166         .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
 167         .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
 168         .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
 169         .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
 170         .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
 171         .kr_intclear = IPATH_KREG_OFFSET(IntClear),
 172         .kr_intmask = IPATH_KREG_OFFSET(IntMask),
 173         .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
 174         .kr_mdio = IPATH_KREG_OFFSET(MDIO),
 175         .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
 176         .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
 177         .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
 178         .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
 179         .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
 180         .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
 181         .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
 182         .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
 183         .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
 184         .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
 185         .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
 186         .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
 187         .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
 188         .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
 189         .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
 190         .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
 191         .kr_revision = IPATH_KREG_OFFSET(Revision),
 192         .kr_scratch = IPATH_KREG_OFFSET(Scratch),
 193         .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
 194         .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
 195         .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
 196         .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
 197         .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
 198         .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
 199         .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
 200         .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
 201         .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
 202         .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
 203         .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
 204         .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
 205         .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
 206         .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
 207         .kr_ibpllcfg = IPATH_KREG_OFFSET(IBPLLCfg),
 208
 209         /*
 210          * These should not be used directly via ipath_read_kreg64(),
 211          * use them with ipath_read_kreg64_port()
 212          */
 213         .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
 214         .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0),
 215
 216         /* This group is pe-800-specific; and used only in this file */
 217         /* The rcvpktled register controls one of the debug port signals, so
 218          * a packet activity LED can be connected to it. */
 219         .kr_rcvpktledcnt = IPATH_KREG_OFFSET(RcvPktLEDCnt),
 220         .kr_pcierbuftestreg0 = IPATH_KREG_OFFSET(PCIeRBufTestReg0),
 221         .kr_pcierbuftestreg1 = IPATH_KREG_OFFSET(PCIeRBufTestReg1),
 222         .kr_pcieq0serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig0),
 223         .kr_pcieq0serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig1),
 224         .kr_pcieq0serdesstatus = IPATH_KREG_OFFSET(PCIEQ0SerdesStatus),
 225         .kr_pcieq1serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig0),
 226         .kr_pcieq1serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig1),
 227         .kr_pcieq1serdesstatus = IPATH_KREG_OFFSET(PCIEQ1SerdesStatus)
 228 };
 229
 230 static const struct ipath_cregs ipath_pe_cregs = {
 231         .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
 232         .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
 233         .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
 234         .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
 235         .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
 236         .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
 237         .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
 238         .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
 239         .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
 240         .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
 241         .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
 242         .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
 243         .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
 244         .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
 245         .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
 246         .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
 247         .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
 248         .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
 249         .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
 250         .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
 251         .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
 252         .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
 253         .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
 254         .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
 255         .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
 256         .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
 257         .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
 258         .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
 259         .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
 260         .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
 261         .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
 262         .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
 263         .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
 264 };
 265
 266 /* kr_intstatus, kr_intclear, kr_intmask bits */
 267 #define INFINIPATH_I_RCVURG_MASK 0x1F
 268 #define INFINIPATH_I_RCVAVAIL_MASK 0x1F
 269
 270 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 271 #define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK  0x000000000000003fULL
 272 #define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
 273 #define INFINIPATH_HWE_PCIEPOISONEDTLP      0x0000000010000000ULL
 274 #define INFINIPATH_HWE_PCIECPLTIMEOUT       0x0000000020000000ULL
 275 #define INFINIPATH_HWE_PCIEBUSPARITYXTLH    0x0000000040000000ULL
 276 #define INFINIPATH_HWE_PCIEBUSPARITYXADM    0x0000000080000000ULL
 277 #define INFINIPATH_HWE_PCIEBUSPARITYRADM    0x0000000100000000ULL
 278 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 279 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 280 #define INFINIPATH_HWE_PCIE1PLLFAILED       0x0400000000000000ULL
 281 #define INFINIPATH_HWE_PCIE0PLLFAILED       0x0800000000000000ULL
 282 #define INFINIPATH_HWE_SERDESPLLFAILED      0x1000000000000000ULL
 283
 284 /* kr_extstatus bits */
 285 #define INFINIPATH_EXTS_FREQSEL 0x2
 286 #define INFINIPATH_EXTS_SERDESSEL 0x4
 287 #define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 288 #define INFINIPATH_EXTS_MEMBIST_FOUND       0x0000000000008000
 289
 290 #define _IPATH_GPIO_SDA_NUM 1
 291 #define _IPATH_GPIO_SCL_NUM 0
 292
 293 #define IPATH_GPIO_SDA (1ULL << \
 294         (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 295 #define IPATH_GPIO_SCL (1ULL << \
 296         (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 297
 298 /**
 299  * ipath_pe_handle_hwerrors - display hardware errors.
 300  * @dd: the infinipath device
 301  * @msg: the output buffer
 302  * @msgl: the size of the output buffer
 303  *
 304  * Use same msg buffer as regular errors to avoid excessive stack
 305  * use.  Most hardware errors are catastrophic, but for right now,
 306  * we'll print them and continue.  We reuse the same message buffer as
 307  * ipath_handle_errors() to avoid excessive stack usage.
 308  */
 309 static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 310                                      size_t msgl)
 311 {
 312         ipath_err_t hwerrs;
 313         u32 bits, ctrl;
 314         int isfatal = 0;
 315         char bitsmsg[64];
 316
 317         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 318         if (!hwerrs) {
 319                 /*
 320                  * better than printing cofusing messages
 321                  * This seems to be related to clearing the crc error, or
 322                  * the pll error during init.
 323                  */
 324                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 325                 return;
 326         } else if (hwerrs == ~0ULL) {
 327                 ipath_dev_err(dd, "Read of hardware error status failed "
 328                               "(all bits set); ignoring\n");
 329                 return;
 330         }
 331         ipath_stats.sps_hwerrs++;
 332
 333         /* Always clear the error status register, except MEMBISTFAIL,
 334          * regardless of whether we continue or stop using the chip.
 335          * We want that set so we know it failed, even across driver reload.
 336          * We'll still ignore it in the hwerrmask.  We do this partly for
 337          * diagnostics, but also for support */
 338         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 339                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 340
 341         hwerrs &= dd->ipath_hwerrmask;
 342
 343         /*
 344          * make sure we get this much out, unless told to be quiet,
 345          * or it's occurred within the last 5 seconds
 346          */
 347         if ((hwerrs & ~dd->ipath_lasthwerror) ||
 348             (ipath_debug & __IPATH_VERBDBG))
 349                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 350                          "(cleared)\n", (unsigned long long) hwerrs);
 351         dd->ipath_lasthwerror |= hwerrs;
 352
 353         if (hwerrs & ~infinipath_hwe_bitsextant)
 354                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 355                               "%llx set\n", (unsigned long long)
 356                               (hwerrs & ~infinipath_hwe_bitsextant));
 357
 358         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 359         if (ctrl & INFINIPATH_C_FREEZEMODE) {
 360                 if (hwerrs) {
 361                         /*
 362                          * if any set that we aren't ignoring only make the
 363                          * complaint once, in case it's stuck or recurring,
 364                          * and we get here multiple times
 365                          */
 366                         if (dd->ipath_flags & IPATH_INITTED) {
 367                                 ipath_dev_err(dd, "Fatal Error (freeze "
 368                                               "mode), no longer usable\n");
 369                                 isfatal = 1;
 370                         }
 371                         /*
 372                          * Mark as having had an error for driver, and also
 373                          * for /sys and status word mapped to user programs.
 374                          * This marks unit as not usable, until reset
 375                          */
 376                         *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
 377                         *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 378                         dd->ipath_flags &= ~IPATH_INITTED;
 379                 } else {
 380                         ipath_dbg("Clearing freezemode on ignored hardware "
 381                                   "error\n");
 382                         ctrl &= ~INFINIPATH_C_FREEZEMODE;
 383                         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
 384                                          ctrl);
 385                 }
 386         }
 387
 388         *msg = '\0';
 389
 390         if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
 391                 strlcat(msg, "[Memory BIST test failed, PE-800 unusable]",
 392                         msgl);
 393                 /* ignore from now on, so disable until driver reloaded */
 394                 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 395                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
 396                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 397                                  dd->ipath_hwerrmask);
 398         }
 399         if (hwerrs & (INFINIPATH_HWE_RXEMEMPARITYERR_MASK
 400                       << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)) {
 401                 bits = (u32) ((hwerrs >>
 402                                INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) &
 403                               INFINIPATH_HWE_RXEMEMPARITYERR_MASK);
 404                 snprintf(bitsmsg, sizeof bitsmsg, "[RXE Parity Errs %x] ",
 405                          bits);
 406                 strlcat(msg, bitsmsg, msgl);
 407         }
 408         if (hwerrs & (INFINIPATH_HWE_TXEMEMPARITYERR_MASK
 409                       << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)) {
 410                 bits = (u32) ((hwerrs >>
 411                                INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) &
 412                               INFINIPATH_HWE_TXEMEMPARITYERR_MASK);
 413                 snprintf(bitsmsg, sizeof bitsmsg, "[TXE Parity Errs %x] ",
 414                          bits);
 415                 strlcat(msg, bitsmsg, msgl);
 416         }
 417         if (hwerrs & (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK
 418                       << INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT)) {
 419                 bits = (u32) ((hwerrs >>
 420                                INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) &
 421                               INFINIPATH_HWE_PCIEMEMPARITYERR_MASK);
 422                 snprintf(bitsmsg, sizeof bitsmsg,
 423                          "[PCIe Mem Parity Errs %x] ", bits);
 424                 strlcat(msg, bitsmsg, msgl);
 425         }
 426         if (hwerrs & INFINIPATH_HWE_IBCBUSTOSPCPARITYERR)
 427                 strlcat(msg, "[IB2IPATH Parity]", msgl);
 428         if (hwerrs & INFINIPATH_HWE_IBCBUSFRSPCPARITYERR)
 429                 strlcat(msg, "[IPATH2IB Parity]", msgl);
 430
 431 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |        \
 432                          INFINIPATH_HWE_COREPLL_RFSLIP )
 433
 434         if (hwerrs & _IPATH_PLL_FAIL) {
 435                 snprintf(bitsmsg, sizeof bitsmsg,
 436                          "[PLL failed (%llx), PE-800 unusable]",
 437                          (unsigned long long) hwerrs & _IPATH_PLL_FAIL);
 438                 strlcat(msg, bitsmsg, msgl);
 439                 /* ignore from now on, so disable until driver reloaded */
 440                 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
 441                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 442                                  dd->ipath_hwerrmask);
 443         }
 444
 445         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
 446                 /*
 447                  * If it occurs, it is left masked since the eternal
 448                  * interface is unused
 449                  */
 450                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 451                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 452                                  dd->ipath_hwerrmask);
 453         }
 454
 455         if (hwerrs & INFINIPATH_HWE_PCIEPOISONEDTLP)
 456                 strlcat(msg, "[PCIe Poisoned TLP]", msgl);
 457         if (hwerrs & INFINIPATH_HWE_PCIECPLTIMEOUT)
 458                 strlcat(msg, "[PCIe completion timeout]", msgl);
 459
 460         /*
 461          * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
 462          * parity or memory parity error failures, because most likely we
 463          * won't be able to talk to the core of the chip.  Nonetheless, we
 464          * might see them, if they are in parts of the PCIe core that aren't
 465          * essential.
 466          */
 467         if (hwerrs & INFINIPATH_HWE_PCIE1PLLFAILED)
 468                 strlcat(msg, "[PCIePLL1]", msgl);
 469         if (hwerrs & INFINIPATH_HWE_PCIE0PLLFAILED)
 470                 strlcat(msg, "[PCIePLL0]", msgl);
 471         if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYXTLH)
 472                 strlcat(msg, "[PCIe XTLH core parity]", msgl);
 473         if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYXADM)
 474                 strlcat(msg, "[PCIe ADM TX core parity]", msgl);
 475         if (hwerrs & INFINIPATH_HWE_PCIEBUSPARITYRADM)
 476                 strlcat(msg, "[PCIe ADM RX core parity]", msgl);
 477
 478         if (hwerrs & INFINIPATH_HWE_RXDSYNCMEMPARITYERR)
 479                 strlcat(msg, "[Rx Dsync]", msgl);
 480         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED)
 481                 strlcat(msg, "[SerDes PLL]", msgl);
 482
 483         ipath_dev_err(dd, "%s hardware error\n", msg);
 484         if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg) {
 485                 /*
 486                  * for /sys status file ; if no trailing } is copied, we'll
 487                  * know it was truncated.
 488                  */
 489                 snprintf(dd->ipath_freezemsg, dd->ipath_freezelen,
 490                          "{%s}", msg);
 491         }
 492 }
 493
 494 /**
 495  * ipath_pe_boardname - fill in the board name
 496  * @dd: the infinipath device
 497  * @name: the output buffer
 498  * @namelen: the size of the output buffer
 499  *
 500  * info is based on the board revision register
 501  */
 502 static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
 503                               size_t namelen)
 504 {
 505         char *n = NULL;
 506         u8 boardrev = dd->ipath_boardrev;
 507         int ret;
 508
 509         switch (boardrev) {
 510         case 0:
 511                 n = "InfiniPath_Emulation";
 512                 break;
 513         case 1:
 514                 n = "InfiniPath_PE-800-Bringup";
 515                 break;
 516         case 2:
 517                 n = "InfiniPath_PE-880";
 518                 break;
 519         case 3:
 520                 n = "InfiniPath_PE-850";
 521                 break;
 522         case 4:
 523                 n = "InfiniPath_PE-860";
 524                 break;
 525         default:
 526                 ipath_dev_err(dd,
 527                               "Don't yet know about board with ID %u\n",
 528                               boardrev);
 529                 snprintf(name, namelen, "Unknown_InfiniPath_PE-8xx_%u",
 530                          boardrev);
 531                 break;
 532         }
 533         if (n)
 534                 snprintf(name, namelen, "%s", n);
 535
 536         if (dd->ipath_majrev != 4 || !dd->ipath_minrev || dd->ipath_minrev>2) {
 537                 ipath_dev_err(dd, "Unsupported PE-800 revision %u.%u!\n",
 538                               dd->ipath_majrev, dd->ipath_minrev);
 539                 ret = 1;
 540         } else
 541                 ret = 0;
 542
 543         return ret;
 544 }
 545
 546 /**
 547  * ipath_pe_init_hwerrors - enable hardware errors
 548  * @dd: the infinipath device
 549  *
 550  * now that we have finished initializing everything that might reasonably
 551  * cause a hardware error, and cleared those errors bits as they occur,
 552  * we can enable hardware errors in the mask (potentially enabling
 553  * freeze mode), and enable hardware errors as errors (along with
 554  * everything else) in errormask
 555  */
 556 static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
 557 {
 558         ipath_err_t val;
 559         u64 extsval;
 560
 561         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
 562
 563         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
 564                 ipath_dev_err(dd, "MemBIST did not complete!\n");
 565
 566         val = ~0ULL;    /* barring bugs, all hwerrors become interrupts, */
 567
 568         if (!dd->ipath_boardrev)        // no PLL for Emulator
 569                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 570
 571         /* workaround bug 9460 in internal interface bus parity checking */
 572         val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
 573
 574         dd->ipath_hwerrmask = val;
 575 }
 576
 577 /**
 578  * ipath_pe_bringup_serdes - bring up the serdes
 579  * @dd: the infinipath device
 580  */
 581 static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
 582 {
 583         u64 val, tmp, config1;
 584         int ret = 0, change = 0;
 585
 586         ipath_dbg("Trying to bringup serdes\n");
 587
 588         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
 589             INFINIPATH_HWE_SERDESPLLFAILED) {
 590                 ipath_dbg("At start, serdes PLL failed bit set "
 591                           "in hwerrstatus, clearing and continuing\n");
 592                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 593                                  INFINIPATH_HWE_SERDESPLLFAILED);
 594         }
 595
 596         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 597         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
 598
 599         ipath_cdbg(VERBOSE, "SerDes status config0=%llx config1=%llx, "
 600                    "xgxsconfig %llx\n", (unsigned long long) val,
 601                    (unsigned long long) config1, (unsigned long long)
 602                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 603
 604         /*
 605          * Force reset on, also set rxdetect enable.  Must do before reading
 606          * serdesstatus at least for simulation, or some of the bits in
 607          * serdes status will come back as undefined and cause simulation
 608          * failures
 609          */
 610         val |= INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RXDETECT_EN
 611                 | INFINIPATH_SERDC0_L1PWR_DN;
 612         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 613         /* be sure chip saw it */
 614         tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 615         udelay(5);              /* need pll reset set at least for a bit */
 616         /*
 617          * after PLL is reset, set the per-lane Resets and TxIdle and
 618          * clear the PLL reset and rxdetect (to get falling edge).
 619          * Leave L1PWR bits set (permanently)
 620          */
 621         val &= ~(INFINIPATH_SERDC0_RXDETECT_EN | INFINIPATH_SERDC0_RESET_PLL
 622                  | INFINIPATH_SERDC0_L1PWR_DN);
 623         val |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
 624         ipath_cdbg(VERBOSE, "Clearing pll reset and setting lane resets "
 625                    "and txidle (%llx)\n", (unsigned long long) val);
 626         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 627         /* be sure chip saw it */
 628         tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 629         /* need PLL reset clear for at least 11 usec before lane
 630          * resets cleared; give it a few more to be sure */
 631         udelay(15);
 632         val &= ~(INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE);
 633
 634         ipath_cdbg(VERBOSE, "Clearing lane resets and txidle "
 635                    "(writing %llx)\n", (unsigned long long) val);
 636         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 637         /* be sure chip saw it */
 638         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 639
 640         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
 641         if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
 642              INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
 643                 val &=
 644                         ~(INFINIPATH_XGXS_MDIOADDR_MASK <<
 645                           INFINIPATH_XGXS_MDIOADDR_SHIFT);
 646                 /* MDIO address 3 */
 647                 val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
 648                 change = 1;
 649         }
 650         if (val & INFINIPATH_XGXS_RESET) {
 651                 val &= ~INFINIPATH_XGXS_RESET;
 652                 change = 1;
 653         }
 654         if (change)
 655                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
 656
 657         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 658
 659         /* clear current and de-emphasis bits */
 660         config1 &= ~0x0ffffffff00ULL;
 661         /* set current to 20ma */
 662         config1 |= 0x00000000000ULL;
 663         /* set de-emphasis to -5.68dB */
 664         config1 |= 0x0cccc000000ULL;
 665         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
 666
 667         ipath_cdbg(VERBOSE, "done: SerDes status config0=%llx "
 668                    "config1=%llx, sstatus=%llx xgxs=%llx\n",
 669                    (unsigned long long) val, (unsigned long long) config1,
 670                    (unsigned long long)
 671                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
 672                    (unsigned long long)
 673                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 674
 675         if (!ipath_waitfor_mdio_cmdready(dd)) {
 676                 ipath_write_kreg(
 677                         dd, dd->ipath_kregs->kr_mdio,
 678                         ipath_mdio_req(IPATH_MDIO_CMD_READ, 31,
 679                                        IPATH_MDIO_CTRL_XGXS_REG_8, 0));
 680                 if (ipath_waitfor_complete(dd, dd->ipath_kregs->kr_mdio,
 681                                            IPATH_MDIO_DATAVALID, &val))
 682                         ipath_dbg("Never got MDIO data for XGXS "
 683                                   "status read\n");
 684                 else
 685                         ipath_cdbg(VERBOSE, "MDIO Read reg8, "
 686                                    "'bank' 31 %x\n", (u32) val);
 687         } else
 688                 ipath_dbg("Never got MDIO cmdready for XGXS status read\n");
 689
 690         return ret;
 691 }
 692
 693 /**
 694  * ipath_pe_quiet_serdes - set serdes to txidle
 695  * @dd: the infinipath device
 696  * Called when driver is being unloaded
 697  */
 698 static void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
 699 {
 700         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 701
 702         val |= INFINIPATH_SERDC0_TXIDLE;
 703         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
 704                   (unsigned long long) val);
 705         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 706 }
 707
 708 /* this is not yet needed on the PE800, so just return 0. */
 709 static int ipath_pe_intconfig(struct ipath_devdata *dd)
 710 {
 711         return 0;
 712 }
 713
 714 /**
 715  * ipath_setup_pe_setextled - set the state of the two external LEDs
 716  * @dd: the infinipath device
 717  * @lst: the L state
 718  * @ltst: the LT state
 719
 720  * These LEDs indicate the physical and logical state of IB link.
 721  * For this chip (at least with recommended board pinouts), LED1
 722  * is Yellow (logical state) and LED2 is Green (physical state),
 723  *
 724  * Note:  We try to match the Mellanox HCA LED behavior as best
 725  * we can.  Green indicates physical link state is OK (something is
 726  * plugged in, and we can train).
 727  * Amber indicates the link is logically up (ACTIVE).
 728  * Mellanox further blinks the amber LED to indicate data packet
 729  * activity, but we have no hardware support for that, so it would
 730  * require waking up every 10-20 msecs and checking the counters
 731  * on the chip, and then turning the LED off if appropriate.  That's
 732  * visible overhead, so not something we will do.
 733  *
 734  */
 735 static void ipath_setup_pe_setextled(struct ipath_devdata *dd, u64 lst,
 736                                      u64 ltst)
 737 {
 738         u64 extctl;
 739
 740         /* the diags use the LED to indicate diag info, so we leave
 741          * the external LED alone when the diags are running */
 742         if (ipath_diag_inuse)
 743                 return;
 744
 745         extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
 746                                        INFINIPATH_EXTC_LED2PRIPORT_ON);
 747
 748         if (ltst & INFINIPATH_IBCS_LT_STATE_LINKUP)
 749                 extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
 750         if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
 751                 extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
 752         dd->ipath_extctrl = extctl;
 753         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
 754 }
 755
 756 /**
 757  * ipath_setup_pe_cleanup - clean up any per-chip chip-specific stuff
 758  * @dd: the infinipath device
 759  *
 760  * This is called during driver unload.
 761  * We do the pci_disable_msi here, not in generic code, because it
 762  * isn't used for the HT-400. If we do end up needing pci_enable_msi
 763  * at some point in the future for HT-400, we'll move the call back
 764  * into the main init_one code.
 765  */
 766 static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
 767 {
 768         dd->ipath_msi_lo = 0;   /* just in case unload fails */
 769         pci_disable_msi(dd->pcidev);
 770 }
 771
 772 /**
 773  * ipath_setup_pe_config - setup PCIe config related stuff
 774  * @dd: the infinipath device
 775  * @pdev: the PCI device
 776  *
 777  * The pci_enable_msi() call will fail on systems with MSI quirks
 778  * such as those with AMD8131, even if the device of interest is not
 779  * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
 780  * late in 2.6.16).
 781  * All that can be done is to edit the kernel source to remove the quirk
 782  * check until that is fixed.
 783  * We do not need to call enable_msi() for our HyperTransport chip (HT-400),
 784  * even those it uses MSI, and we want to avoid the quirk warning, so
 785  * So we call enable_msi only for the PE-800.  If we do end up needing
 786  * pci_enable_msi at some point in the future for HT-400, we'll move the
 787  * call back into the main init_one code.
 788  * We save the msi lo and hi values, so we can restore them after
 789  * chip reset (the kernel PCI infrastructure doesn't yet handle that
 790  * correctly).
 791  */
 792 static int ipath_setup_pe_config(struct ipath_devdata *dd,
 793                                  struct pci_dev *pdev)
 794 {
 795         int pos, ret;
 796
 797         dd->ipath_msi_lo = 0;   /* used as a flag during reset processing */
 798         ret = pci_enable_msi(dd->pcidev);
 799         if (ret)
 800                 ipath_dev_err(dd, "pci_enable_msi failed: %d, "
 801                               "interrupts may not work\n", ret);
 802         /* continue even if it fails, we may still be OK... */
 803
 804         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
 805                 u16 control;
 806                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
 807                                       &dd->ipath_msi_lo);
 808                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
 809                                       &dd->ipath_msi_hi);
 810                 pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
 811                                      &control);
 812                 /* now save the data (vector) info */
 813                 pci_read_config_word(dd->pcidev,
 814                                      pos + ((control & PCI_MSI_FLAGS_64BIT)
 815                                             ? 12 : 8),
 816                                      &dd->ipath_msi_data);
 817                 ipath_cdbg(VERBOSE, "Read msi data 0x%x from config offset "
 818                            "0x%x, control=0x%x\n", dd->ipath_msi_data,
 819                            pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
 820                            control);
 821                 /* we save the cachelinesize also, although it doesn't
 822                  * really matter */
 823                 pci_read_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
 824                                      &dd->ipath_pci_cacheline);
 825         } else
 826                 ipath_dev_err(dd, "Can't find MSI capability, "
 827                               "can't save MSI settings for reset\n");
 828         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP))) {
 829                 u16 linkstat;
 830                 pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
 831                                      &linkstat);
 832                 linkstat >>= 4;
 833                 linkstat &= 0x1f;
 834                 if (linkstat != 8)
 835                         ipath_dev_err(dd, "PCIe width %u, "
 836                                       "performance reduced\n", linkstat);
 837         }
 838         else
 839                 ipath_dev_err(dd, "Can't find PCI Express "
 840                               "capability!\n");
 841         return 0;
 842 }
 843
 844 static void ipath_init_pe_variables(void)
 845 {
 846         /*
 847          * bits for selecting i2c direction and values,
 848          * used for I2C serial flash
 849          */
 850         ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
 851         ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
 852         ipath_gpio_sda = IPATH_GPIO_SDA;
 853         ipath_gpio_scl = IPATH_GPIO_SCL;
 854
 855         /* variables for sanity checking interrupt and errors */
 856         infinipath_hwe_bitsextant =
 857                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
 858                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
 859                 (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
 860                  INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
 861                 INFINIPATH_HWE_PCIE1PLLFAILED |
 862                 INFINIPATH_HWE_PCIE0PLLFAILED |
 863                 INFINIPATH_HWE_PCIEPOISONEDTLP |
 864                 INFINIPATH_HWE_PCIECPLTIMEOUT |
 865                 INFINIPATH_HWE_PCIEBUSPARITYXTLH |
 866                 INFINIPATH_HWE_PCIEBUSPARITYXADM |
 867                 INFINIPATH_HWE_PCIEBUSPARITYRADM |
 868                 INFINIPATH_HWE_MEMBISTFAILED |
 869                 INFINIPATH_HWE_COREPLL_FBSLIP |
 870                 INFINIPATH_HWE_COREPLL_RFSLIP |
 871                 INFINIPATH_HWE_SERDESPLLFAILED |
 872                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
 873                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
 874         infinipath_i_bitsextant =
 875                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
 876                 (INFINIPATH_I_RCVAVAIL_MASK <<
 877                  INFINIPATH_I_RCVAVAIL_SHIFT) |
 878                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
 879                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
 880         infinipath_e_bitsextant =
 881                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
 882                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
 883                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
 884                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
 885                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
 886                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
 887                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
 888                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
 889                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
 890                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
 891                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
 892                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
 893                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
 894                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
 895                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
 896                 INFINIPATH_E_HARDWARE;
 897
 898         infinipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
 899         infinipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
 900 }
 901
 902 /* setup the MSI stuff again after a reset.  I'd like to just call
 903  * pci_enable_msi() and request_irq() again, but when I do that,
 904  * the MSI enable bit doesn't get set in the command word, and
 905  * we switch to to a different interrupt vector, which is confusing,
 906  * so I instead just do it all inline.  Perhaps somehow can tie this
 907  * into the PCIe hotplug support at some point
 908  * Note, because I'm doing it all here, I don't call pci_disable_msi()
 909  * or free_irq() at the start of ipath_setup_pe_reset().
 910  */
 911 static int ipath_reinit_msi(struct ipath_devdata *dd)
 912 {
 913         int pos;
 914         u16 control;
 915         int ret;
 916
 917         if (!dd->ipath_msi_lo) {
 918                 dev_info(&dd->pcidev->dev, "Can't restore MSI config, "
 919                          "initial setup failed?\n");
 920                 ret = 0;
 921                 goto bail;
 922         }
 923
 924         if (!(pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
 925                 ipath_dev_err(dd, "Can't find MSI capability, "
 926                               "can't restore MSI settings\n");
 927                 ret = 0;
 928                 goto bail;
 929         }
 930         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
 931                    dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
 932         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
 933                                dd->ipath_msi_lo);
 934         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
 935                    dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
 936         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
 937                                dd->ipath_msi_hi);
 938         pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
 939         if (!(control & PCI_MSI_FLAGS_ENABLE)) {
 940                 ipath_cdbg(VERBOSE, "MSI control at off %x was %x, "
 941                            "setting MSI enable (%x)\n", pos + PCI_MSI_FLAGS,
 942                            control, control | PCI_MSI_FLAGS_ENABLE);
 943                 control |= PCI_MSI_FLAGS_ENABLE;
 944                 pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
 945                                       control);
 946         }
 947         /* now rewrite the data (vector) info */
 948         pci_write_config_word(dd->pcidev, pos +
 949                               ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
 950                               dd->ipath_msi_data);
 951         /* we restore the cachelinesize also, although it doesn't really
 952          * matter */
 953         pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
 954                               dd->ipath_pci_cacheline);
 955         /* and now set the pci master bit again */
 956         pci_set_master(dd->pcidev);
 957         ret = 1;
 958
 959 bail:
 960         return ret;
 961 }
 962
 963 /* This routine sleeps, so it can only be called from user context, not
 964  * from interrupt context.  If we need interrupt context, we can split
 965  * it into two routines.
 966 */
 967 static int ipath_setup_pe_reset(struct ipath_devdata *dd)
 968 {
 969         u64 val;
 970         int i;
 971         int ret;
 972
 973         /* Use ERROR so it shows up in logs, etc. */
 974         ipath_dev_err(dd, "Resetting PE-800 unit %u\n",
 975                       dd->ipath_unit);
 976         /* keep chip from being accessed in a few places */
 977         dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT);
 978         val = dd->ipath_control | INFINIPATH_C_RESET;
 979         ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
 980         mb();
 981
 982         for (i = 1; i <= 5; i++) {
 983                 int r;
 984                 /* allow MBIST, etc. to complete; longer on each retry.
 985                  * We sometimes get machine checks from bus timeout if no
 986                  * response, so for now, make it *really* long.
 987                  */
 988                 msleep(1000 + (1 + i) * 2000);
 989                 if ((r =
 990                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
 991                                             dd->ipath_pcibar0)))
 992                         ipath_dev_err(dd, "rewrite of BAR0 failed: %d\n",
 993                                       r);
 994                 if ((r =
 995                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
 996                                             dd->ipath_pcibar1)))
 997                         ipath_dev_err(dd, "rewrite of BAR1 failed: %d\n",
 998                                       r);
 999                 /* now re-enable memory access */
1000                 if ((r = pci_enable_device(dd->pcidev)))
1001                         ipath_dev_err(dd, "pci_enable_device failed after "
1002                                       "reset: %d\n", r);
1003                 /* whether it worked or not, mark as present, again */
1004                 dd->ipath_flags |= IPATH_PRESENT;
1005                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
1006                 if (val == dd->ipath_revision) {
1007                         ipath_cdbg(VERBOSE, "Got matching revision "
1008                                    "register %llx on try %d\n",
1009                                    (unsigned long long) val, i);
1010                         ret = ipath_reinit_msi(dd);
1011                         goto bail;
1012                 }
1013                 /* Probably getting -1 back */
1014                 ipath_dbg("Didn't get expected revision register, "
1015                           "got %llx, try %d\n", (unsigned long long) val,
1016                           i + 1);
1017         }
1018         ret = 0; /* failed */
1019
1020 bail:
1021         return ret;
1022 }
1023
1024 /**
1025  * ipath_pe_put_tid - write a TID in chip
1026  * @dd: the infinipath device
1027  * @tidptr: pointer to the expected TID (in chip) to udpate
1028  * @tidtype: 0 for eager, 1 for expected
1029  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1030  *
1031  * This exists as a separate routine to allow for special locking etc.
1032  * It's used for both the full cleanup on exit, as well as the normal
1033  * setup and teardown.
1034  */
1035 static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
1036                              u32 type, unsigned long pa)
1037 {
1038         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1039         unsigned long flags = 0; /* keep gcc quiet */
1040
1041         if (pa != dd->ipath_tidinvalid) {
1042                 if (pa & ((1U << 11) - 1)) {
1043                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1044                                  "not 4KB aligned!\n", pa);
1045                         return;
1046                 }
1047                 pa >>= 11;
1048                 /* paranoia check */
1049                 if (pa & (7<<29))
1050                         ipath_dev_err(dd,
1051                                       "BUG: Physical page address 0x%lx "
1052                                       "has bits set in 31-29\n", pa);
1053
1054                 if (type == 0)
1055                         pa |= dd->ipath_tidtemplate;
1056                 else /* for now, always full 4KB page */
1057                         pa |= 2 << 29;
1058         }
1059
1060         /* workaround chip bug 9437 by writing each TID twice
1061          * and holding a spinlock around the writes, so they don't
1062          * intermix with other TID (eager or expected) writes
1063          * Unfortunately, this call can be done from interrupt level
1064          * for the port 0 eager TIDs, so we have to use irqsave
1065          */
1066         spin_lock_irqsave(&dd->ipath_tid_lock, flags);
1067         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xfeeddeaf);
1068         if (dd->ipath_kregbase)
1069                 writel(pa, tidp32);
1070         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xdeadbeef);
1071         mmiowb();
1072         spin_unlock_irqrestore(&dd->ipath_tid_lock, flags);
1073 }
1074
1075 /**
1076  * ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
1077  * @dd: the infinipath device
1078  * @port: the port
1079  *
1080  * clear all TID entries for a port, expected and eager.
1081  * Used from ipath_close().  On PE800, TIDs are only 32 bits,
1082  * not 64, but they are still on 64 bit boundaries, so tidbase
1083  * is declared as u64 * for the pointer math, even though we write 32 bits
1084  */
1085 static void ipath_pe_clear_tids(struct ipath_devdata *dd, unsigned port)
1086 {
1087         u64 __iomem *tidbase;
1088         unsigned long tidinv;
1089         int i;
1090
1091         if (!dd->ipath_kregbase)
1092                 return;
1093
1094         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1095
1096         tidinv = dd->ipath_tidinvalid;
1097         tidbase = (u64 __iomem *)
1098                 ((char __iomem *)(dd->ipath_kregbase) +
1099                  dd->ipath_rcvtidbase +
1100                  port * dd->ipath_rcvtidcnt * sizeof(*tidbase));
1101
1102         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1103                 ipath_pe_put_tid(dd, &tidbase[i], 0, tidinv);
1104
1105         tidbase = (u64 __iomem *)
1106                 ((char __iomem *)(dd->ipath_kregbase) +
1107                  dd->ipath_rcvegrbase +
1108                  port * dd->ipath_rcvegrcnt * sizeof(*tidbase));
1109
1110         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1111                 ipath_pe_put_tid(dd, &tidbase[i], 1, tidinv);
1112 }
1113
1114 /**
1115  * ipath_pe_tidtemplate - setup constants for TID updates
1116  * @dd: the infinipath device
1117  *
1118  * We setup stuff that we use a lot, to avoid calculating each time
1119  */
1120 static void ipath_pe_tidtemplate(struct ipath_devdata *dd)
1121 {
1122         u32 egrsize = dd->ipath_rcvegrbufsize;
1123
1124         /* For now, we always allocate 4KB buffers (at init) so we can
1125          * receive max size packets.  We may want a module parameter to
1126          * specify 2KB or 4KB and/or make be per port instead of per device
1127          * for those who want to reduce memory footprint.  Note that the
1128          * ipath_rcvhdrentsize size must be large enough to hold the largest
1129          * IB header (currently 96 bytes) that we expect to handle (plus of
1130          * course the 2 dwords of RHF).
1131          */
1132         if (egrsize == 2048)
1133                 dd->ipath_tidtemplate = 1U << 29;
1134         else if (egrsize == 4096)
1135                 dd->ipath_tidtemplate = 2U << 29;
1136         else {
1137                 egrsize = 4096;
1138                 dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize "
1139                          "%u, using %u\n", dd->ipath_rcvegrbufsize,
1140                          egrsize);
1141                 dd->ipath_tidtemplate = 2U << 29;
1142         }
1143         dd->ipath_tidinvalid = 0;
1144 }
1145
1146 static int ipath_pe_early_init(struct ipath_devdata *dd)
1147 {
1148         dd->ipath_flags |= IPATH_4BYTE_TID;
1149
1150         /*
1151          * For openib, we need to be able to handle an IB header of 96 bytes
1152          * or 24 dwords.  HT-400 has arbitrary sized receive buffers, so we
1153          * made them the same size as the PIO buffers.  The PE-800 does not
1154          * handle arbitrary size buffers, so we need the header large enough
1155          * to handle largest IB header, but still have room for a 2KB MTU
1156          * standard IB packet.
1157          */
1158         dd->ipath_rcvhdrentsize = 24;
1159         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1160
1161         /* For HT-400, we allocate a somewhat overly large eager buffer,
1162          * such that we can guarantee that we can receive the largest packet
1163          * that we can send out.  To truly support a 4KB MTU, we need to
1164          * bump this to a larger value.  We'll do this when I get around to
1165          * testing 4KB sends on the PE-800, which I have not yet done.
1166          */
1167         dd->ipath_rcvegrbufsize = 2048;
1168         /*
1169          * the min() check here is currently a nop, but it may not always
1170          * be, depending on just how we do ipath_rcvegrbufsize
1171          */
1172         dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
1173                                  dd->ipath_rcvegrbufsize +
1174                                  (dd->ipath_rcvhdrentsize << 2));
1175         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1176
1177         /*
1178          * For PE-800, we can request a receive interrupt for 1 or
1179          * more packets from current offset.  For now, we set this
1180          * up for a single packet, to match the HT-400 behavior.
1181          */
1182         dd->ipath_rhdrhead_intr_off = 1ULL<<32;
1183
1184         ipath_get_eeprom_info(dd);
1185
1186         return 0;
1187 }
1188
1189 int __attribute__((weak)) ipath_unordered_wc(void)
1190 {
1191         return 0;
1192 }
1193
1194 /**
1195  * ipath_init_pe_get_base_info - set chip-specific flags for user code
1196  * @dd: the infinipath device
1197  * @kbase: ipath_base_info pointer
1198  *
1199  * We set the PCIE flag because the lower bandwidth on PCIe vs
1200  * HyperTransport can affect some user packet algorithims.
1201  */
1202 static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
1203 {
1204         struct ipath_base_info *kinfo = kbase;
1205
1206         if (ipath_unordered_wc()) {
1207                 kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
1208                 ipath_cdbg(PROC, "Intel processor, forcing WC order\n");
1209         }
1210         else
1211                 ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");
1212
1213         kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE;
1214
1215         return 0;
1216 }
1217
1218 /**
1219  * ipath_init_pe800_funcs - set up the chip-specific function pointers
1220  * @dd: the infinipath device
1221  *
1222  * This is global, and is called directly at init to set up the
1223  * chip-specific function pointers for later use.
1224  */
1225 void ipath_init_pe800_funcs(struct ipath_devdata *dd)
1226 {
1227         dd->ipath_f_intrsetup = ipath_pe_intconfig;
1228         dd->ipath_f_bus = ipath_setup_pe_config;
1229         dd->ipath_f_reset = ipath_setup_pe_reset;
1230         dd->ipath_f_get_boardname = ipath_pe_boardname;
1231         dd->ipath_f_init_hwerrors = ipath_pe_init_hwerrors;
1232         dd->ipath_f_early_init = ipath_pe_early_init;
1233         dd->ipath_f_handle_hwerrors = ipath_pe_handle_hwerrors;
1234         dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
1235         dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
1236         dd->ipath_f_clear_tids = ipath_pe_clear_tids;
1237         dd->ipath_f_put_tid = ipath_pe_put_tid;
1238         dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
1239         dd->ipath_f_setextled = ipath_setup_pe_setextled;
1240         dd->ipath_f_get_base_info = ipath_pe_get_base_info;
1241
1242         /* initialize chip-specific variables */
1243         dd->ipath_f_tidtemplate = ipath_pe_tidtemplate;
1244
1245         /*
1246          * setup the register offsets, since they are different for each
1247          * chip
1248          */
1249         dd->ipath_kregs = &ipath_pe_kregs;
1250         dd->ipath_cregs = &ipath_pe_cregs;
1251
1252         ipath_init_pe_variables();
1253 }
1254