drivers/infiniband/hw/ipath/ipath_iba6120.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 PCIe 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 PCI-Express chip.
  49  *
  50  * This lists the InfiniPath 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         /* The rcvpktled register controls one of the debug port signals, so
 217          * a packet activity LED can be connected to it. */
 218         .kr_rcvpktledcnt = IPATH_KREG_OFFSET(RcvPktLEDCnt),
 219         .kr_pcierbuftestreg0 = IPATH_KREG_OFFSET(PCIeRBufTestReg0),
 220         .kr_pcierbuftestreg1 = IPATH_KREG_OFFSET(PCIeRBufTestReg1),
 221         .kr_pcieq0serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig0),
 222         .kr_pcieq0serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig1),
 223         .kr_pcieq0serdesstatus = IPATH_KREG_OFFSET(PCIEQ0SerdesStatus),
 224         .kr_pcieq1serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig0),
 225         .kr_pcieq1serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig1),
 226         .kr_pcieq1serdesstatus = IPATH_KREG_OFFSET(PCIEQ1SerdesStatus)
 227 };
 228
 229 static const struct ipath_cregs ipath_pe_cregs = {
 230         .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
 231         .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
 232         .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
 233         .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
 234         .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
 235         .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
 236         .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
 237         .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
 238         .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
 239         .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
 240         .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
 241         .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
 242         .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
 243         .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
 244         .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
 245         .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
 246         .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
 247         .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
 248         .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
 249         .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
 250         .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
 251         .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
 252         .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
 253         .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
 254         .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
 255         .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
 256         .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
 257         .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
 258         .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
 259         .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
 260         .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
 261         .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
 262         .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
 263 };
 264
 265 /* kr_intstatus, kr_intclear, kr_intmask bits */
 266 #define INFINIPATH_I_RCVURG_MASK 0x1F
 267 #define INFINIPATH_I_RCVAVAIL_MASK 0x1F
 268
 269 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 270 #define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK  0x000000000000003fULL
 271 #define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
 272 #define INFINIPATH_HWE_PCIEPOISONEDTLP      0x0000000010000000ULL
 273 #define INFINIPATH_HWE_PCIECPLTIMEOUT       0x0000000020000000ULL
 274 #define INFINIPATH_HWE_PCIEBUSPARITYXTLH    0x0000000040000000ULL
 275 #define INFINIPATH_HWE_PCIEBUSPARITYXADM    0x0000000080000000ULL
 276 #define INFINIPATH_HWE_PCIEBUSPARITYRADM    0x0000000100000000ULL
 277 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 278 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 279 #define INFINIPATH_HWE_PCIE1PLLFAILED       0x0400000000000000ULL
 280 #define INFINIPATH_HWE_PCIE0PLLFAILED       0x0800000000000000ULL
 281 #define INFINIPATH_HWE_SERDESPLLFAILED      0x1000000000000000ULL
 282
 283 /* kr_extstatus bits */
 284 #define INFINIPATH_EXTS_FREQSEL 0x2
 285 #define INFINIPATH_EXTS_SERDESSEL 0x4
 286 #define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 287 #define INFINIPATH_EXTS_MEMBIST_FOUND       0x0000000000008000
 288
 289 #define _IPATH_GPIO_SDA_NUM 1
 290 #define _IPATH_GPIO_SCL_NUM 0
 291
 292 #define IPATH_GPIO_SDA (1ULL << \
 293         (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 294 #define IPATH_GPIO_SCL (1ULL << \
 295         (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 296
 297 /**
 298  * ipath_pe_handle_hwerrors - display hardware errors.
 299  * @dd: the infinipath device
 300  * @msg: the output buffer
 301  * @msgl: the size of the output buffer
 302  *
 303  * Use same msg buffer as regular errors to avoid excessive stack
 304  * use.  Most hardware errors are catastrophic, but for right now,
 305  * we'll print them and continue.  We reuse the same message buffer as
 306  * ipath_handle_errors() to avoid excessive stack usage.
 307  */
 308 static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 309                                      size_t msgl)
 310 {
 311         ipath_err_t hwerrs;
 312         u32 bits, ctrl;
 313         int isfatal = 0;
 314         char bitsmsg[64];
 315
 316         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 317         if (!hwerrs) {
 318                 /*
 319                  * better than printing cofusing messages
 320                  * This seems to be related to clearing the crc error, or
 321                  * the pll error during init.
 322                  */
 323                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 324                 return;
 325         } else if (hwerrs == ~0ULL) {
 326                 ipath_dev_err(dd, "Read of hardware error status failed "
 327                               "(all bits set); ignoring\n");
 328                 return;
 329         }
 330         ipath_stats.sps_hwerrs++;
 331
 332         /* Always clear the error status register, except MEMBISTFAIL,
 333          * regardless of whether we continue or stop using the chip.
 334          * We want that set so we know it failed, even across driver reload.
 335          * We'll still ignore it in the hwerrmask.  We do this partly for
 336          * diagnostics, but also for support */
 337         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 338                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 339
 340         hwerrs &= dd->ipath_hwerrmask;
 341
 342         /*
 343          * make sure we get this much out, unless told to be quiet,
 344          * or it's occurred within the last 5 seconds
 345          */
 346         if ((hwerrs & ~dd->ipath_lasthwerror) ||
 347             (ipath_debug & __IPATH_VERBDBG))
 348                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 349                          "(cleared)\n", (unsigned long long) hwerrs);
 350         dd->ipath_lasthwerror |= hwerrs;
 351
 352         if (hwerrs & ~infinipath_hwe_bitsextant)
 353                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 354                               "%llx set\n", (unsigned long long)
 355                               (hwerrs & ~infinipath_hwe_bitsextant));
 356
 357         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 358         if (ctrl & INFINIPATH_C_FREEZEMODE) {
 359                 if (hwerrs) {
 360                         /*
 361                          * if any set that we aren't ignoring only make the
 362                          * complaint once, in case it's stuck or recurring,
 363                          * and we get here multiple times
 364                          */
 365                         if (dd->ipath_flags & IPATH_INITTED) {
 366                                 ipath_dev_err(dd, "Fatal Hardware Error (freeze "
 367                                               "mode), no longer usable, SN %.16s\n",
 368                                                   dd->ipath_serial);
 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, InfiniPath hardware 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), InfiniPath hardware 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_QLE7140-Bringup";
 515                 break;
 516         case 2:
 517                 n = "InfiniPath_QLE7140";
 518                 break;
 519         case 3:
 520                 n = "InfiniPath_QMI7140";
 521                 break;
 522         case 4:
 523                 n = "InfiniPath_QEM7140";
 524                 break;
 525         case 5:
 526                 n = "InfiniPath_QMH7140";
 527                 break;
 528         default:
 529                 ipath_dev_err(dd,
 530                               "Don't yet know about board with ID %u\n",
 531                               boardrev);
 532                 snprintf(name, namelen, "Unknown_InfiniPath_PCIe_%u",
 533                          boardrev);
 534                 break;
 535         }
 536         if (n)
 537                 snprintf(name, namelen, "%s", n);
 538
 539         if (dd->ipath_majrev != 4 || !dd->ipath_minrev || dd->ipath_minrev>2) {
 540                 ipath_dev_err(dd, "Unsupported InfiniPath hardware revision %u.%u!\n",
 541                               dd->ipath_majrev, dd->ipath_minrev);
 542                 ret = 1;
 543         } else
 544                 ret = 0;
 545
 546         return ret;
 547 }
 548
 549 /**
 550  * ipath_pe_init_hwerrors - enable hardware errors
 551  * @dd: the infinipath device
 552  *
 553  * now that we have finished initializing everything that might reasonably
 554  * cause a hardware error, and cleared those errors bits as they occur,
 555  * we can enable hardware errors in the mask (potentially enabling
 556  * freeze mode), and enable hardware errors as errors (along with
 557  * everything else) in errormask
 558  */
 559 static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
 560 {
 561         ipath_err_t val;
 562         u64 extsval;
 563
 564         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
 565
 566         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
 567                 ipath_dev_err(dd, "MemBIST did not complete!\n");
 568
 569         val = ~0ULL;    /* barring bugs, all hwerrors become interrupts, */
 570
 571         if (!dd->ipath_boardrev)        // no PLL for Emulator
 572                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 573
 574         /* workaround bug 9460 in internal interface bus parity checking */
 575         val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
 576
 577         dd->ipath_hwerrmask = val;
 578 }
 579
 580 /**
 581  * ipath_pe_bringup_serdes - bring up the serdes
 582  * @dd: the infinipath device
 583  */
 584 static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
 585 {
 586         u64 val, tmp, config1;
 587         int ret = 0, change = 0;
 588
 589         ipath_dbg("Trying to bringup serdes\n");
 590
 591         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
 592             INFINIPATH_HWE_SERDESPLLFAILED) {
 593                 ipath_dbg("At start, serdes PLL failed bit set "
 594                           "in hwerrstatus, clearing and continuing\n");
 595                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 596                                  INFINIPATH_HWE_SERDESPLLFAILED);
 597         }
 598
 599         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 600         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
 601
 602         ipath_cdbg(VERBOSE, "SerDes status config0=%llx config1=%llx, "
 603                    "xgxsconfig %llx\n", (unsigned long long) val,
 604                    (unsigned long long) config1, (unsigned long long)
 605                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 606
 607         /*
 608          * Force reset on, also set rxdetect enable.  Must do before reading
 609          * serdesstatus at least for simulation, or some of the bits in
 610          * serdes status will come back as undefined and cause simulation
 611          * failures
 612          */
 613         val |= INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RXDETECT_EN
 614                 | INFINIPATH_SERDC0_L1PWR_DN;
 615         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 616         /* be sure chip saw it */
 617         tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 618         udelay(5);              /* need pll reset set at least for a bit */
 619         /*
 620          * after PLL is reset, set the per-lane Resets and TxIdle and
 621          * clear the PLL reset and rxdetect (to get falling edge).
 622          * Leave L1PWR bits set (permanently)
 623          */
 624         val &= ~(INFINIPATH_SERDC0_RXDETECT_EN | INFINIPATH_SERDC0_RESET_PLL
 625                  | INFINIPATH_SERDC0_L1PWR_DN);
 626         val |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
 627         ipath_cdbg(VERBOSE, "Clearing pll reset and setting lane resets "
 628                    "and txidle (%llx)\n", (unsigned long long) val);
 629         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 630         /* be sure chip saw it */
 631         tmp = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 632         /* need PLL reset clear for at least 11 usec before lane
 633          * resets cleared; give it a few more to be sure */
 634         udelay(15);
 635         val &= ~(INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE);
 636
 637         ipath_cdbg(VERBOSE, "Clearing lane resets and txidle "
 638                    "(writing %llx)\n", (unsigned long long) val);
 639         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 640         /* be sure chip saw it */
 641         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 642
 643         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
 644         if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
 645              INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
 646                 val &=
 647                         ~(INFINIPATH_XGXS_MDIOADDR_MASK <<
 648                           INFINIPATH_XGXS_MDIOADDR_SHIFT);
 649                 /* MDIO address 3 */
 650                 val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
 651                 change = 1;
 652         }
 653         if (val & INFINIPATH_XGXS_RESET) {
 654                 val &= ~INFINIPATH_XGXS_RESET;
 655                 change = 1;
 656         }
 657         if (change)
 658                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
 659
 660         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 661
 662         /* clear current and de-emphasis bits */
 663         config1 &= ~0x0ffffffff00ULL;
 664         /* set current to 20ma */
 665         config1 |= 0x00000000000ULL;
 666         /* set de-emphasis to -5.68dB */
 667         config1 |= 0x0cccc000000ULL;
 668         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
 669
 670         ipath_cdbg(VERBOSE, "done: SerDes status config0=%llx "
 671                    "config1=%llx, sstatus=%llx xgxs=%llx\n",
 672                    (unsigned long long) val, (unsigned long long) config1,
 673                    (unsigned long long)
 674                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
 675                    (unsigned long long)
 676                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 677
 678         if (!ipath_waitfor_mdio_cmdready(dd)) {
 679                 ipath_write_kreg(
 680                         dd, dd->ipath_kregs->kr_mdio,
 681                         ipath_mdio_req(IPATH_MDIO_CMD_READ, 31,
 682                                        IPATH_MDIO_CTRL_XGXS_REG_8, 0));
 683                 if (ipath_waitfor_complete(dd, dd->ipath_kregs->kr_mdio,
 684                                            IPATH_MDIO_DATAVALID, &val))
 685                         ipath_dbg("Never got MDIO data for XGXS "
 686                                   "status read\n");
 687                 else
 688                         ipath_cdbg(VERBOSE, "MDIO Read reg8, "
 689                                    "'bank' 31 %x\n", (u32) val);
 690         } else
 691                 ipath_dbg("Never got MDIO cmdready for XGXS status read\n");
 692
 693         return ret;
 694 }
 695
 696 /**
 697  * ipath_pe_quiet_serdes - set serdes to txidle
 698  * @dd: the infinipath device
 699  * Called when driver is being unloaded
 700  */
 701 static void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
 702 {
 703         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 704
 705         val |= INFINIPATH_SERDC0_TXIDLE;
 706         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
 707                   (unsigned long long) val);
 708         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 709 }
 710
 711 /* this is not yet needed on this chip, so just return 0. */
 712 static int ipath_pe_intconfig(struct ipath_devdata *dd)
 713 {
 714         return 0;
 715 }
 716
 717 /**
 718  * ipath_setup_pe_setextled - set the state of the two external LEDs
 719  * @dd: the infinipath device
 720  * @lst: the L state
 721  * @ltst: the LT state
 722
 723  * These LEDs indicate the physical and logical state of IB link.
 724  * For this chip (at least with recommended board pinouts), LED1
 725  * is Yellow (logical state) and LED2 is Green (physical state),
 726  *
 727  * Note:  We try to match the Mellanox HCA LED behavior as best
 728  * we can.  Green indicates physical link state is OK (something is
 729  * plugged in, and we can train).
 730  * Amber indicates the link is logically up (ACTIVE).
 731  * Mellanox further blinks the amber LED to indicate data packet
 732  * activity, but we have no hardware support for that, so it would
 733  * require waking up every 10-20 msecs and checking the counters
 734  * on the chip, and then turning the LED off if appropriate.  That's
 735  * visible overhead, so not something we will do.
 736  *
 737  */
 738 static void ipath_setup_pe_setextled(struct ipath_devdata *dd, u64 lst,
 739                                      u64 ltst)
 740 {
 741         u64 extctl;
 742
 743         /* the diags use the LED to indicate diag info, so we leave
 744          * the external LED alone when the diags are running */
 745         if (ipath_diag_inuse)
 746                 return;
 747
 748         extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
 749                                        INFINIPATH_EXTC_LED2PRIPORT_ON);
 750
 751         if (ltst & INFINIPATH_IBCS_LT_STATE_LINKUP)
 752                 extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
 753         if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
 754                 extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
 755         dd->ipath_extctrl = extctl;
 756         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
 757 }
 758
 759 /**
 760  * ipath_setup_pe_cleanup - clean up any per-chip chip-specific stuff
 761  * @dd: the infinipath device
 762  *
 763  * This is called during driver unload.
 764  * We do the pci_disable_msi here, not in generic code, because it
 765  * isn't used for the HT chips. If we do end up needing pci_enable_msi
 766  * at some point in the future for HT, we'll move the call back
 767  * into the main init_one code.
 768  */
 769 static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
 770 {
 771         dd->ipath_msi_lo = 0;   /* just in case unload fails */
 772         pci_disable_msi(dd->pcidev);
 773 }
 774
 775 /**
 776  * ipath_setup_pe_config - setup PCIe config related stuff
 777  * @dd: the infinipath device
 778  * @pdev: the PCI device
 779  *
 780  * The pci_enable_msi() call will fail on systems with MSI quirks
 781  * such as those with AMD8131, even if the device of interest is not
 782  * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
 783  * late in 2.6.16).
 784  * All that can be done is to edit the kernel source to remove the quirk
 785  * check until that is fixed.
 786  * We do not need to call enable_msi() for our HyperTransport chip,
 787  * even though it uses MSI, and we want to avoid the quirk warning, so
 788  * So we call enable_msi only for PCIe.  If we do end up needing
 789  * pci_enable_msi at some point in the future for HT, we'll move the
 790  * call back into the main init_one code.
 791  * We save the msi lo and hi values, so we can restore them after
 792  * chip reset (the kernel PCI infrastructure doesn't yet handle that
 793  * correctly).
 794  */
 795 static int ipath_setup_pe_config(struct ipath_devdata *dd,
 796                                  struct pci_dev *pdev)
 797 {
 798         int pos, ret;
 799
 800         dd->ipath_msi_lo = 0;   /* used as a flag during reset processing */
 801         ret = pci_enable_msi(dd->pcidev);
 802         if (ret)
 803                 ipath_dev_err(dd, "pci_enable_msi failed: %d, "
 804                               "interrupts may not work\n", ret);
 805         /* continue even if it fails, we may still be OK... */
 806
 807         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
 808                 u16 control;
 809                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
 810                                       &dd->ipath_msi_lo);
 811                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
 812                                       &dd->ipath_msi_hi);
 813                 pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
 814                                      &control);
 815                 /* now save the data (vector) info */
 816                 pci_read_config_word(dd->pcidev,
 817                                      pos + ((control & PCI_MSI_FLAGS_64BIT)
 818                                             ? 12 : 8),
 819                                      &dd->ipath_msi_data);
 820                 ipath_cdbg(VERBOSE, "Read msi data 0x%x from config offset "
 821                            "0x%x, control=0x%x\n", dd->ipath_msi_data,
 822                            pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
 823                            control);
 824                 /* we save the cachelinesize also, although it doesn't
 825                  * really matter */
 826                 pci_read_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
 827                                      &dd->ipath_pci_cacheline);
 828         } else
 829                 ipath_dev_err(dd, "Can't find MSI capability, "
 830                               "can't save MSI settings for reset\n");
 831         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP))) {
 832                 u16 linkstat;
 833                 pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
 834                                      &linkstat);
 835                 linkstat >>= 4;
 836                 linkstat &= 0x1f;
 837                 if (linkstat != 8)
 838                         ipath_dev_err(dd, "PCIe width %u, "
 839                                       "performance reduced\n", linkstat);
 840         }
 841         else
 842                 ipath_dev_err(dd, "Can't find PCI Express "
 843                               "capability!\n");
 844         return 0;
 845 }
 846
 847 static void ipath_init_pe_variables(void)
 848 {
 849         /*
 850          * bits for selecting i2c direction and values,
 851          * used for I2C serial flash
 852          */
 853         ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
 854         ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
 855         ipath_gpio_sda = IPATH_GPIO_SDA;
 856         ipath_gpio_scl = IPATH_GPIO_SCL;
 857
 858         /* variables for sanity checking interrupt and errors */
 859         infinipath_hwe_bitsextant =
 860                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
 861                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
 862                 (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
 863                  INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
 864                 INFINIPATH_HWE_PCIE1PLLFAILED |
 865                 INFINIPATH_HWE_PCIE0PLLFAILED |
 866                 INFINIPATH_HWE_PCIEPOISONEDTLP |
 867                 INFINIPATH_HWE_PCIECPLTIMEOUT |
 868                 INFINIPATH_HWE_PCIEBUSPARITYXTLH |
 869                 INFINIPATH_HWE_PCIEBUSPARITYXADM |
 870                 INFINIPATH_HWE_PCIEBUSPARITYRADM |
 871                 INFINIPATH_HWE_MEMBISTFAILED |
 872                 INFINIPATH_HWE_COREPLL_FBSLIP |
 873                 INFINIPATH_HWE_COREPLL_RFSLIP |
 874                 INFINIPATH_HWE_SERDESPLLFAILED |
 875                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
 876                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
 877         infinipath_i_bitsextant =
 878                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
 879                 (INFINIPATH_I_RCVAVAIL_MASK <<
 880                  INFINIPATH_I_RCVAVAIL_SHIFT) |
 881                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
 882                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
 883         infinipath_e_bitsextant =
 884                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
 885                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
 886                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
 887                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
 888                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
 889                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
 890                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
 891                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
 892                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
 893                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
 894                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
 895                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
 896                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
 897                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
 898                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
 899                 INFINIPATH_E_HARDWARE;
 900
 901         infinipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
 902         infinipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
 903 }
 904
 905 /* setup the MSI stuff again after a reset.  I'd like to just call
 906  * pci_enable_msi() and request_irq() again, but when I do that,
 907  * the MSI enable bit doesn't get set in the command word, and
 908  * we switch to to a different interrupt vector, which is confusing,
 909  * so I instead just do it all inline.  Perhaps somehow can tie this
 910  * into the PCIe hotplug support at some point
 911  * Note, because I'm doing it all here, I don't call pci_disable_msi()
 912  * or free_irq() at the start of ipath_setup_pe_reset().
 913  */
 914 static int ipath_reinit_msi(struct ipath_devdata *dd)
 915 {
 916         int pos;
 917         u16 control;
 918         int ret;
 919
 920         if (!dd->ipath_msi_lo) {
 921                 dev_info(&dd->pcidev->dev, "Can't restore MSI config, "
 922                          "initial setup failed?\n");
 923                 ret = 0;
 924                 goto bail;
 925         }
 926
 927         if (!(pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
 928                 ipath_dev_err(dd, "Can't find MSI capability, "
 929                               "can't restore MSI settings\n");
 930                 ret = 0;
 931                 goto bail;
 932         }
 933         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
 934                    dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
 935         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
 936                                dd->ipath_msi_lo);
 937         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
 938                    dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
 939         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
 940                                dd->ipath_msi_hi);
 941         pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
 942         if (!(control & PCI_MSI_FLAGS_ENABLE)) {
 943                 ipath_cdbg(VERBOSE, "MSI control at off %x was %x, "
 944                            "setting MSI enable (%x)\n", pos + PCI_MSI_FLAGS,
 945                            control, control | PCI_MSI_FLAGS_ENABLE);
 946                 control |= PCI_MSI_FLAGS_ENABLE;
 947                 pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
 948                                       control);
 949         }
 950         /* now rewrite the data (vector) info */
 951         pci_write_config_word(dd->pcidev, pos +
 952                               ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
 953                               dd->ipath_msi_data);
 954         /* we restore the cachelinesize also, although it doesn't really
 955          * matter */
 956         pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
 957                               dd->ipath_pci_cacheline);
 958         /* and now set the pci master bit again */
 959         pci_set_master(dd->pcidev);
 960         ret = 1;
 961
 962 bail:
 963         return ret;
 964 }
 965
 966 /* This routine sleeps, so it can only be called from user context, not
 967  * from interrupt context.  If we need interrupt context, we can split
 968  * it into two routines.
 969 */
 970 static int ipath_setup_pe_reset(struct ipath_devdata *dd)
 971 {
 972         u64 val;
 973         int i;
 974         int ret;
 975
 976         /* Use ERROR so it shows up in logs, etc. */
 977         ipath_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->ipath_unit);
 978         /* keep chip from being accessed in a few places */
 979         dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT);
 980         val = dd->ipath_control | INFINIPATH_C_RESET;
 981         ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
 982         mb();
 983
 984         for (i = 1; i <= 5; i++) {
 985                 int r;
 986                 /* allow MBIST, etc. to complete; longer on each retry.
 987                  * We sometimes get machine checks from bus timeout if no
 988                  * response, so for now, make it *really* long.
 989                  */
 990                 msleep(1000 + (1 + i) * 2000);
 991                 if ((r =
 992                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
 993                                             dd->ipath_pcibar0)))
 994                         ipath_dev_err(dd, "rewrite of BAR0 failed: %d\n",
 995                                       r);
 996                 if ((r =
 997                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
 998                                             dd->ipath_pcibar1)))
 999                         ipath_dev_err(dd, "rewrite of BAR1 failed: %d\n",
1000                                       r);
1001                 /* now re-enable memory access */
1002                 if ((r = pci_enable_device(dd->pcidev)))
1003                         ipath_dev_err(dd, "pci_enable_device failed after "
1004                                       "reset: %d\n", r);
1005                 /* whether it worked or not, mark as present, again */
1006                 dd->ipath_flags |= IPATH_PRESENT;
1007                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
1008                 if (val == dd->ipath_revision) {
1009                         ipath_cdbg(VERBOSE, "Got matching revision "
1010                                    "register %llx on try %d\n",
1011                                    (unsigned long long) val, i);
1012                         ret = ipath_reinit_msi(dd);
1013                         goto bail;
1014                 }
1015                 /* Probably getting -1 back */
1016                 ipath_dbg("Didn't get expected revision register, "
1017                           "got %llx, try %d\n", (unsigned long long) val,
1018                           i + 1);
1019         }
1020         ret = 0; /* failed */
1021
1022 bail:
1023         return ret;
1024 }
1025
1026 /**
1027  * ipath_pe_put_tid - write a TID in chip
1028  * @dd: the infinipath device
1029  * @tidptr: pointer to the expected TID (in chip) to udpate
1030  * @tidtype: 0 for eager, 1 for expected
1031  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1032  *
1033  * This exists as a separate routine to allow for special locking etc.
1034  * It's used for both the full cleanup on exit, as well as the normal
1035  * setup and teardown.
1036  */
1037 static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
1038                              u32 type, unsigned long pa)
1039 {
1040         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1041         unsigned long flags = 0; /* keep gcc quiet */
1042
1043         if (pa != dd->ipath_tidinvalid) {
1044                 if (pa & ((1U << 11) - 1)) {
1045                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1046                                  "not 4KB aligned!\n", pa);
1047                         return;
1048                 }
1049                 pa >>= 11;
1050                 /* paranoia check */
1051                 if (pa & (7<<29))
1052                         ipath_dev_err(dd,
1053                                       "BUG: Physical page address 0x%lx "
1054                                       "has bits set in 31-29\n", pa);
1055
1056                 if (type == 0)
1057                         pa |= dd->ipath_tidtemplate;
1058                 else /* for now, always full 4KB page */
1059                         pa |= 2 << 29;
1060         }
1061
1062         /* workaround chip bug 9437 by writing each TID twice
1063          * and holding a spinlock around the writes, so they don't
1064          * intermix with other TID (eager or expected) writes
1065          * Unfortunately, this call can be done from interrupt level
1066          * for the port 0 eager TIDs, so we have to use irqsave
1067          */
1068         spin_lock_irqsave(&dd->ipath_tid_lock, flags);
1069         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xfeeddeaf);
1070         if (dd->ipath_kregbase)
1071                 writel(pa, tidp32);
1072         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xdeadbeef);
1073         mmiowb();
1074         spin_unlock_irqrestore(&dd->ipath_tid_lock, flags);
1075 }
1076
1077 /**
1078  * ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
1079  * @dd: the infinipath device
1080  * @port: the port
1081  *
1082  * clear all TID entries for a port, expected and eager.
1083  * Used from ipath_close().  On this chip, TIDs are only 32 bits,
1084  * not 64, but they are still on 64 bit boundaries, so tidbase
1085  * is declared as u64 * for the pointer math, even though we write 32 bits
1086  */
1087 static void ipath_pe_clear_tids(struct ipath_devdata *dd, unsigned port)
1088 {
1089         u64 __iomem *tidbase;
1090         unsigned long tidinv;
1091         int i;
1092
1093         if (!dd->ipath_kregbase)
1094                 return;
1095
1096         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1097
1098         tidinv = dd->ipath_tidinvalid;
1099         tidbase = (u64 __iomem *)
1100                 ((char __iomem *)(dd->ipath_kregbase) +
1101                  dd->ipath_rcvtidbase +
1102                  port * dd->ipath_rcvtidcnt * sizeof(*tidbase));
1103
1104         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1105                 ipath_pe_put_tid(dd, &tidbase[i], 0, tidinv);
1106
1107         tidbase = (u64 __iomem *)
1108                 ((char __iomem *)(dd->ipath_kregbase) +
1109                  dd->ipath_rcvegrbase +
1110                  port * dd->ipath_rcvegrcnt * sizeof(*tidbase));
1111
1112         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1113                 ipath_pe_put_tid(dd, &tidbase[i], 1, tidinv);
1114 }
1115
1116 /**
1117  * ipath_pe_tidtemplate - setup constants for TID updates
1118  * @dd: the infinipath device
1119  *
1120  * We setup stuff that we use a lot, to avoid calculating each time
1121  */
1122 static void ipath_pe_tidtemplate(struct ipath_devdata *dd)
1123 {
1124         u32 egrsize = dd->ipath_rcvegrbufsize;
1125
1126         /* For now, we always allocate 4KB buffers (at init) so we can
1127          * receive max size packets.  We may want a module parameter to
1128          * specify 2KB or 4KB and/or make be per port instead of per device
1129          * for those who want to reduce memory footprint.  Note that the
1130          * ipath_rcvhdrentsize size must be large enough to hold the largest
1131          * IB header (currently 96 bytes) that we expect to handle (plus of
1132          * course the 2 dwords of RHF).
1133          */
1134         if (egrsize == 2048)
1135                 dd->ipath_tidtemplate = 1U << 29;
1136         else if (egrsize == 4096)
1137                 dd->ipath_tidtemplate = 2U << 29;
1138         else {
1139                 egrsize = 4096;
1140                 dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize "
1141                          "%u, using %u\n", dd->ipath_rcvegrbufsize,
1142                          egrsize);
1143                 dd->ipath_tidtemplate = 2U << 29;
1144         }
1145         dd->ipath_tidinvalid = 0;
1146 }
1147
1148 static int ipath_pe_early_init(struct ipath_devdata *dd)
1149 {
1150         dd->ipath_flags |= IPATH_4BYTE_TID;
1151
1152         /*
1153          * For openfabrics, we need to be able to handle an IB header of
1154          * 24 dwords.  HT chip has arbitrary sized receive buffers, so we
1155          * made them the same size as the PIO buffers.  This chip does not
1156          * handle arbitrary size buffers, so we need the header large enough
1157          * to handle largest IB header, but still have room for a 2KB MTU
1158          * standard IB packet.
1159          */
1160         dd->ipath_rcvhdrentsize = 24;
1161         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1162
1163         /*
1164          * To truly support a 4KB MTU (for usermode), we need to
1165          * bump this to a larger value.  For now, we use them for
1166          * the kernel only.
1167          */
1168         dd->ipath_rcvegrbufsize = 2048;
1169         /*
1170          * the min() check here is currently a nop, but it may not always
1171          * be, depending on just how we do ipath_rcvegrbufsize
1172          */
1173         dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
1174                                  dd->ipath_rcvegrbufsize +
1175                                  (dd->ipath_rcvhdrentsize << 2));
1176         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1177
1178         /*
1179          * We can request a receive interrupt for 1 or
1180          * more packets from current offset.  For now, we set this
1181          * up for a single packet.
1182          */
1183         dd->ipath_rhdrhead_intr_off = 1ULL<<32;
1184
1185         ipath_get_eeprom_info(dd);
1186
1187         return 0;
1188 }
1189
1190 int __attribute__((weak)) ipath_unordered_wc(void)
1191 {
1192         return 0;
1193 }
1194
1195 /**
1196  * ipath_init_pe_get_base_info - set chip-specific flags for user code
1197  * @dd: the infinipath device
1198  * @kbase: ipath_base_info pointer
1199  *
1200  * We set the PCIE flag because the lower bandwidth on PCIe vs
1201  * HyperTransport can affect some user packet algorithims.
1202  */
1203 static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
1204 {
1205         struct ipath_base_info *kinfo = kbase;
1206
1207         if (ipath_unordered_wc()) {
1208                 kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
1209                 ipath_cdbg(PROC, "Intel processor, forcing WC order\n");
1210         }
1211         else
1212                 ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");
1213
1214         kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE;
1215
1216         return 0;
1217 }
1218
1219 /**
1220  * ipath_init_iba6120_funcs - set up the chip-specific function pointers
1221  * @dd: the infinipath device
1222  *
1223  * This is global, and is called directly at init to set up the
1224  * chip-specific function pointers for later use.
1225  */
1226 void ipath_init_iba6120_funcs(struct ipath_devdata *dd)
1227 {
1228         dd->ipath_f_intrsetup = ipath_pe_intconfig;
1229         dd->ipath_f_bus = ipath_setup_pe_config;
1230         dd->ipath_f_reset = ipath_setup_pe_reset;
1231         dd->ipath_f_get_boardname = ipath_pe_boardname;
1232         dd->ipath_f_init_hwerrors = ipath_pe_init_hwerrors;
1233         dd->ipath_f_early_init = ipath_pe_early_init;
1234         dd->ipath_f_handle_hwerrors = ipath_pe_handle_hwerrors;
1235         dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
1236         dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
1237         dd->ipath_f_clear_tids = ipath_pe_clear_tids;
1238         dd->ipath_f_put_tid = ipath_pe_put_tid;
1239         dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
1240         dd->ipath_f_setextled = ipath_setup_pe_setextled;
1241         dd->ipath_f_get_base_info = ipath_pe_get_base_info;
1242
1243         /* initialize chip-specific variables */
1244         dd->ipath_f_tidtemplate = ipath_pe_tidtemplate;
1245
1246         /*
1247          * setup the register offsets, since they are different for each
1248          * chip
1249          */
1250         dd->ipath_kregs = &ipath_pe_kregs;
1251         dd->ipath_cregs = &ipath_pe_cregs;
1252
1253         ipath_init_pe_variables();
1254 }
1255