drivers/infiniband/hw/ipath/ipath_iba6110.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 /*
  35  * This file contains all of the code that is specific to the InfiniPath
  36  * HT chip.
  37  */
  38
  39 #include <linux/pci.h>
  40 #include <linux/delay.h>
  41 #include <linux/htirq.h>
  42
  43 #include "ipath_kernel.h"
  44 #include "ipath_registers.h"
  45
  46 static void ipath_setup_ht_setextled(struct ipath_devdata *, u64, u64);
  47
  48
  49 /*
  50  * This lists the InfiniPath registers, in the actual chip layout.
  51  * This structure should never be directly accessed.
  52  *
  53  * The names are in InterCap form because they're taken straight from
  54  * the chip specification.  Since they're only used in this file, they
  55  * don't pollute the rest of the source.
  56 */
  57
  58 struct _infinipath_do_not_use_kernel_regs {
  59         unsigned long long Revision;
  60         unsigned long long Control;
  61         unsigned long long PageAlign;
  62         unsigned long long PortCnt;
  63         unsigned long long DebugPortSelect;
  64         unsigned long long DebugPort;
  65         unsigned long long SendRegBase;
  66         unsigned long long UserRegBase;
  67         unsigned long long CounterRegBase;
  68         unsigned long long Scratch;
  69         unsigned long long ReservedMisc1;
  70         unsigned long long InterruptConfig;
  71         unsigned long long IntBlocked;
  72         unsigned long long IntMask;
  73         unsigned long long IntStatus;
  74         unsigned long long IntClear;
  75         unsigned long long ErrorMask;
  76         unsigned long long ErrorStatus;
  77         unsigned long long ErrorClear;
  78         unsigned long long HwErrMask;
  79         unsigned long long HwErrStatus;
  80         unsigned long long HwErrClear;
  81         unsigned long long HwDiagCtrl;
  82         unsigned long long MDIO;
  83         unsigned long long IBCStatus;
  84         unsigned long long IBCCtrl;
  85         unsigned long long ExtStatus;
  86         unsigned long long ExtCtrl;
  87         unsigned long long GPIOOut;
  88         unsigned long long GPIOMask;
  89         unsigned long long GPIOStatus;
  90         unsigned long long GPIOClear;
  91         unsigned long long RcvCtrl;
  92         unsigned long long RcvBTHQP;
  93         unsigned long long RcvHdrSize;
  94         unsigned long long RcvHdrCnt;
  95         unsigned long long RcvHdrEntSize;
  96         unsigned long long RcvTIDBase;
  97         unsigned long long RcvTIDCnt;
  98         unsigned long long RcvEgrBase;
  99         unsigned long long RcvEgrCnt;
 100         unsigned long long RcvBufBase;
 101         unsigned long long RcvBufSize;
 102         unsigned long long RxIntMemBase;
 103         unsigned long long RxIntMemSize;
 104         unsigned long long RcvPartitionKey;
 105         unsigned long long ReservedRcv[10];
 106         unsigned long long SendCtrl;
 107         unsigned long long SendPIOBufBase;
 108         unsigned long long SendPIOSize;
 109         unsigned long long SendPIOBufCnt;
 110         unsigned long long SendPIOAvailAddr;
 111         unsigned long long TxIntMemBase;
 112         unsigned long long TxIntMemSize;
 113         unsigned long long ReservedSend[9];
 114         unsigned long long SendBufferError;
 115         unsigned long long SendBufferErrorCONT1;
 116         unsigned long long SendBufferErrorCONT2;
 117         unsigned long long SendBufferErrorCONT3;
 118         unsigned long long ReservedSBE[4];
 119         unsigned long long RcvHdrAddr0;
 120         unsigned long long RcvHdrAddr1;
 121         unsigned long long RcvHdrAddr2;
 122         unsigned long long RcvHdrAddr3;
 123         unsigned long long RcvHdrAddr4;
 124         unsigned long long RcvHdrAddr5;
 125         unsigned long long RcvHdrAddr6;
 126         unsigned long long RcvHdrAddr7;
 127         unsigned long long RcvHdrAddr8;
 128         unsigned long long ReservedRHA[7];
 129         unsigned long long RcvHdrTailAddr0;
 130         unsigned long long RcvHdrTailAddr1;
 131         unsigned long long RcvHdrTailAddr2;
 132         unsigned long long RcvHdrTailAddr3;
 133         unsigned long long RcvHdrTailAddr4;
 134         unsigned long long RcvHdrTailAddr5;
 135         unsigned long long RcvHdrTailAddr6;
 136         unsigned long long RcvHdrTailAddr7;
 137         unsigned long long RcvHdrTailAddr8;
 138         unsigned long long ReservedRHTA[7];
 139         unsigned long long Sync;        /* Software only */
 140         unsigned long long Dump;        /* Software only */
 141         unsigned long long SimVer;      /* Software only */
 142         unsigned long long ReservedSW[5];
 143         unsigned long long SerdesConfig0;
 144         unsigned long long SerdesConfig1;
 145         unsigned long long SerdesStatus;
 146         unsigned long long XGXSConfig;
 147         unsigned long long ReservedSW2[4];
 148 };
 149
 150 #define IPATH_KREG_OFFSET(field) (offsetof(struct \
 151     _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
 152 #define IPATH_CREG_OFFSET(field) (offsetof( \
 153     struct infinipath_counters, field) / sizeof(u64))
 154
 155 static const struct ipath_kregs ipath_ht_kregs = {
 156         .kr_control = IPATH_KREG_OFFSET(Control),
 157         .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
 158         .kr_debugport = IPATH_KREG_OFFSET(DebugPort),
 159         .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
 160         .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
 161         .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
 162         .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
 163         .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
 164         .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
 165         .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
 166         .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
 167         .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
 168         .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
 169         .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
 170         .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
 171         .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
 172         .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
 173         .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
 174         .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
 175         .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
 176         .kr_intclear = IPATH_KREG_OFFSET(IntClear),
 177         .kr_interruptconfig = IPATH_KREG_OFFSET(InterruptConfig),
 178         .kr_intmask = IPATH_KREG_OFFSET(IntMask),
 179         .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
 180         .kr_mdio = IPATH_KREG_OFFSET(MDIO),
 181         .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
 182         .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
 183         .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
 184         .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
 185         .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
 186         .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
 187         .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
 188         .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
 189         .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
 190         .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
 191         .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
 192         .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
 193         .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
 194         .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
 195         .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
 196         .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
 197         .kr_revision = IPATH_KREG_OFFSET(Revision),
 198         .kr_scratch = IPATH_KREG_OFFSET(Scratch),
 199         .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
 200         .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
 201         .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
 202         .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
 203         .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
 204         .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
 205         .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
 206         .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
 207         .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
 208         .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
 209         .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
 210         .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
 211         .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
 212         .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
 213         /*
 214          * These should not be used directly via ipath_write_kreg64(),
 215          * use them with ipath_write_kreg64_port(),
 216          */
 217         .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
 218         .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0)
 219 };
 220
 221 static const struct ipath_cregs ipath_ht_cregs = {
 222         .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
 223         .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
 224         .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
 225         .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
 226         .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
 227         .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
 228         .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
 229         .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
 230         .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
 231         .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
 232         .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
 233         .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
 234         /* calc from Reg_CounterRegBase + offset */
 235         .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
 236         .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
 237         .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
 238         .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
 239         .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
 240         .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
 241         .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
 242         .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
 243         .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
 244         .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
 245         .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
 246         .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
 247         .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
 248         .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
 249         .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
 250         .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
 251         .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
 252         .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
 253         .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
 254         .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
 255         .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
 256 };
 257
 258 /* kr_intstatus, kr_intclear, kr_intmask bits */
 259 #define INFINIPATH_I_RCVURG_MASK ((1U<<9)-1)
 260 #define INFINIPATH_I_RCVAVAIL_MASK ((1U<<9)-1)
 261
 262 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 263 #define INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT 0
 264 #define INFINIPATH_HWE_HTCMEMPARITYERR_MASK 0x3FFFFFULL
 265 #define INFINIPATH_HWE_HTCLNKABYTE0CRCERR   0x0000000000800000ULL
 266 #define INFINIPATH_HWE_HTCLNKABYTE1CRCERR   0x0000000001000000ULL
 267 #define INFINIPATH_HWE_HTCLNKBBYTE0CRCERR   0x0000000002000000ULL
 268 #define INFINIPATH_HWE_HTCLNKBBYTE1CRCERR   0x0000000004000000ULL
 269 #define INFINIPATH_HWE_HTCMISCERR4          0x0000000008000000ULL
 270 #define INFINIPATH_HWE_HTCMISCERR5          0x0000000010000000ULL
 271 #define INFINIPATH_HWE_HTCMISCERR6          0x0000000020000000ULL
 272 #define INFINIPATH_HWE_HTCMISCERR7          0x0000000040000000ULL
 273 #define INFINIPATH_HWE_HTCBUSTREQPARITYERR  0x0000000080000000ULL
 274 #define INFINIPATH_HWE_HTCBUSTRESPPARITYERR 0x0000000100000000ULL
 275 #define INFINIPATH_HWE_HTCBUSIREQPARITYERR  0x0000000200000000ULL
 276 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 277 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 278 #define INFINIPATH_HWE_HTBPLL_FBSLIP        0x0200000000000000ULL
 279 #define INFINIPATH_HWE_HTBPLL_RFSLIP        0x0400000000000000ULL
 280 #define INFINIPATH_HWE_HTAPLL_FBSLIP        0x0800000000000000ULL
 281 #define INFINIPATH_HWE_HTAPLL_RFSLIP        0x1000000000000000ULL
 282 #define INFINIPATH_HWE_SERDESPLLFAILED      0x2000000000000000ULL
 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_CORRECT     0x0000000000008000
 289
 290
 291 /* TID entries (memory), HT-only */
 292 #define INFINIPATH_RT_ADDR_MASK 0xFFFFFFFFFFULL /* 40 bits valid */
 293 #define INFINIPATH_RT_VALID 0x8000000000000000ULL
 294 #define INFINIPATH_RT_ADDR_SHIFT 0
 295 #define INFINIPATH_RT_BUFSIZE_MASK 0x3FFFULL
 296 #define INFINIPATH_RT_BUFSIZE_SHIFT 48
 297
 298 /*
 299  * masks and bits that are different in different chips, or present only
 300  * in one
 301  */
 302 static const ipath_err_t infinipath_hwe_htcmemparityerr_mask =
 303     INFINIPATH_HWE_HTCMEMPARITYERR_MASK;
 304 static const ipath_err_t infinipath_hwe_htcmemparityerr_shift =
 305     INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT;
 306
 307 static const ipath_err_t infinipath_hwe_htclnkabyte0crcerr =
 308     INFINIPATH_HWE_HTCLNKABYTE0CRCERR;
 309 static const ipath_err_t infinipath_hwe_htclnkabyte1crcerr =
 310     INFINIPATH_HWE_HTCLNKABYTE1CRCERR;
 311 static const ipath_err_t infinipath_hwe_htclnkbbyte0crcerr =
 312     INFINIPATH_HWE_HTCLNKBBYTE0CRCERR;
 313 static const ipath_err_t infinipath_hwe_htclnkbbyte1crcerr =
 314     INFINIPATH_HWE_HTCLNKBBYTE1CRCERR;
 315
 316 #define _IPATH_GPIO_SDA_NUM 1
 317 #define _IPATH_GPIO_SCL_NUM 0
 318
 319 #define IPATH_GPIO_SDA \
 320         (1ULL << (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 321 #define IPATH_GPIO_SCL \
 322         (1ULL << (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 323
 324 /* keep the code below somewhat more readonable; not used elsewhere */
 325 #define _IPATH_HTLINK0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr |     \
 326                                 infinipath_hwe_htclnkabyte1crcerr)
 327 #define _IPATH_HTLINK1_CRCBITS (infinipath_hwe_htclnkbbyte0crcerr |     \
 328                                 infinipath_hwe_htclnkbbyte1crcerr)
 329 #define _IPATH_HTLANE0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr |     \
 330                                 infinipath_hwe_htclnkbbyte0crcerr)
 331 #define _IPATH_HTLANE1_CRCBITS (infinipath_hwe_htclnkabyte1crcerr |     \
 332                                 infinipath_hwe_htclnkbbyte1crcerr)
 333
 334 static void hwerr_crcbits(struct ipath_devdata *dd, ipath_err_t hwerrs,
 335                           char *msg, size_t msgl)
 336 {
 337         char bitsmsg[64];
 338         ipath_err_t crcbits = hwerrs &
 339                 (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS);
 340         /* don't check if 8bit HT */
 341         if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
 342                 crcbits &= ~infinipath_hwe_htclnkabyte1crcerr;
 343         /* don't check if 8bit HT */
 344         if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
 345                 crcbits &= ~infinipath_hwe_htclnkbbyte1crcerr;
 346         /*
 347          * we'll want to ignore link errors on link that is
 348          * not in use, if any.  For now, complain about both
 349          */
 350         if (crcbits) {
 351                 u16 ctrl0, ctrl1;
 352                 snprintf(bitsmsg, sizeof bitsmsg,
 353                          "[HT%s lane %s CRC (%llx); powercycle to completely clear]",
 354                          !(crcbits & _IPATH_HTLINK1_CRCBITS) ?
 355                          "0 (A)" : (!(crcbits & _IPATH_HTLINK0_CRCBITS)
 356                                     ? "1 (B)" : "0+1 (A+B)"),
 357                          !(crcbits & _IPATH_HTLANE1_CRCBITS) ? "0"
 358                          : (!(crcbits & _IPATH_HTLANE0_CRCBITS) ? "1" :
 359                             "0+1"), (unsigned long long) crcbits);
 360                 strlcat(msg, bitsmsg, msgl);
 361
 362                 /*
 363                  * print extra info for debugging.  slave/primary
 364                  * config word 4, 8 (link control 0, 1)
 365                  */
 366
 367                 if (pci_read_config_word(dd->pcidev,
 368                                          dd->ipath_ht_slave_off + 0x4,
 369                                          &ctrl0))
 370                         dev_info(&dd->pcidev->dev, "Couldn't read "
 371                                  "linkctrl0 of slave/primary "
 372                                  "config block\n");
 373                 else if (!(ctrl0 & 1 << 6))
 374                         /* not if EOC bit set */
 375                         ipath_dbg("HT linkctrl0 0x%x%s%s\n", ctrl0,
 376                                   ((ctrl0 >> 8) & 7) ? " CRC" : "",
 377                                   ((ctrl0 >> 4) & 1) ? "linkfail" :
 378                                   "");
 379                 if (pci_read_config_word(dd->pcidev,
 380                                          dd->ipath_ht_slave_off + 0x8,
 381                                          &ctrl1))
 382                         dev_info(&dd->pcidev->dev, "Couldn't read "
 383                                  "linkctrl1 of slave/primary "
 384                                  "config block\n");
 385                 else if (!(ctrl1 & 1 << 6))
 386                         /* not if EOC bit set */
 387                         ipath_dbg("HT linkctrl1 0x%x%s%s\n", ctrl1,
 388                                   ((ctrl1 >> 8) & 7) ? " CRC" : "",
 389                                   ((ctrl1 >> 4) & 1) ? "linkfail" :
 390                                   "");
 391
 392                 /* disable until driver reloaded */
 393                 dd->ipath_hwerrmask &= ~crcbits;
 394                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 395                                  dd->ipath_hwerrmask);
 396                 ipath_dbg("HT crc errs: %s\n", msg);
 397         } else
 398                 ipath_dbg("ignoring HT crc errors 0x%llx, "
 399                           "not in use\n", (unsigned long long)
 400                           (hwerrs & (_IPATH_HTLINK0_CRCBITS |
 401                                      _IPATH_HTLINK1_CRCBITS)));
 402 }
 403
 404 /* 6110 specific hardware errors... */
 405 static const struct ipath_hwerror_msgs ipath_6110_hwerror_msgs[] = {
 406         INFINIPATH_HWE_MSG(HTCBUSIREQPARITYERR, "HTC Ireq Parity"),
 407         INFINIPATH_HWE_MSG(HTCBUSTREQPARITYERR, "HTC Treq Parity"),
 408         INFINIPATH_HWE_MSG(HTCBUSTRESPPARITYERR, "HTC Tresp Parity"),
 409         INFINIPATH_HWE_MSG(HTCMISCERR5, "HT core Misc5"),
 410         INFINIPATH_HWE_MSG(HTCMISCERR6, "HT core Misc6"),
 411         INFINIPATH_HWE_MSG(HTCMISCERR7, "HT core Misc7"),
 412         INFINIPATH_HWE_MSG(RXDSYNCMEMPARITYERR, "Rx Dsync"),
 413         INFINIPATH_HWE_MSG(SERDESPLLFAILED, "SerDes PLL"),
 414 };
 415
 416 #define TXE_PIO_PARITY ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF | \
 417                         INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC) \
 418                         << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)
 419 #define RXE_EAGER_PARITY (INFINIPATH_HWE_RXEMEMPARITYERR_EAGERTID \
 420                           << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)
 421
 422 static int ipath_ht_txe_recover(struct ipath_devdata *);
 423
 424 /**
 425  * ipath_ht_handle_hwerrors - display hardware errors.
 426  * @dd: the infinipath device
 427  * @msg: the output buffer
 428  * @msgl: the size of the output buffer
 429  *
 430  * Use same msg buffer as regular errors to avoid excessive stack
 431  * use.  Most hardware errors are catastrophic, but for right now,
 432  * we'll print them and continue.  We reuse the same message buffer as
 433  * ipath_handle_errors() to avoid excessive stack usage.
 434  */
 435 static void ipath_ht_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 436                                      size_t msgl)
 437 {
 438         ipath_err_t hwerrs;
 439         u32 bits, ctrl;
 440         int isfatal = 0;
 441         char bitsmsg[64];
 442
 443         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 444
 445         if (!hwerrs) {
 446                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 447                 /*
 448                  * better than printing cofusing messages
 449                  * This seems to be related to clearing the crc error, or
 450                  * the pll error during init.
 451                  */
 452                 goto bail;
 453         } else if (hwerrs == -1LL) {
 454                 ipath_dev_err(dd, "Read of hardware error status failed "
 455                               "(all bits set); ignoring\n");
 456                 goto bail;
 457         }
 458         ipath_stats.sps_hwerrs++;
 459
 460         /* Always clear the error status register, except MEMBISTFAIL,
 461          * regardless of whether we continue or stop using the chip.
 462          * We want that set so we know it failed, even across driver reload.
 463          * We'll still ignore it in the hwerrmask.  We do this partly for
 464          * diagnostics, but also for support */
 465         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 466                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 467
 468         hwerrs &= dd->ipath_hwerrmask;
 469
 470         /*
 471          * make sure we get this much out, unless told to be quiet,
 472          * it's a parity error we may recover from,
 473          * or it's occurred within the last 5 seconds
 474          */
 475         if ((hwerrs & ~(dd->ipath_lasthwerror | TXE_PIO_PARITY |
 476                 RXE_EAGER_PARITY)) ||
 477                 (ipath_debug & __IPATH_VERBDBG))
 478                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 479                          "(cleared)\n", (unsigned long long) hwerrs);
 480         dd->ipath_lasthwerror |= hwerrs;
 481
 482         if (hwerrs & ~dd->ipath_hwe_bitsextant)
 483                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 484                               "%llx set\n", (unsigned long long)
 485                               (hwerrs & ~dd->ipath_hwe_bitsextant));
 486
 487         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 488         if ((ctrl & INFINIPATH_C_FREEZEMODE) && !ipath_diag_inuse) {
 489                 /*
 490                  * parity errors in send memory are recoverable,
 491                  * just cancel the send (if indicated in * sendbuffererror),
 492                  * count the occurrence, unfreeze (if no other handled
 493                  * hardware error bits are set), and continue. They can
 494                  * occur if a processor speculative read is done to the PIO
 495                  * buffer while we are sending a packet, for example.
 496                  */
 497                 if ((hwerrs & TXE_PIO_PARITY) && ipath_ht_txe_recover(dd))
 498                         hwerrs &= ~TXE_PIO_PARITY;
 499                 if (hwerrs & RXE_EAGER_PARITY)
 500                         ipath_dev_err(dd, "RXE parity, Eager TID error is not "
 501                                 "recoverable\n");
 502                 if (!hwerrs) {
 503                         ipath_dbg("Clearing freezemode on ignored or "
 504                                   "recovered hardware error\n");
 505                         ctrl &= ~INFINIPATH_C_FREEZEMODE;
 506                         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
 507                                          ctrl);
 508                 }
 509         }
 510
 511         *msg = '\0';
 512
 513         /*
 514          * may someday want to decode into which bits are which
 515          * functional area for parity errors, etc.
 516          */
 517         if (hwerrs & (infinipath_hwe_htcmemparityerr_mask
 518                       << INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT)) {
 519                 bits = (u32) ((hwerrs >>
 520                                INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) &
 521                               INFINIPATH_HWE_HTCMEMPARITYERR_MASK);
 522                 snprintf(bitsmsg, sizeof bitsmsg, "[HTC Parity Errs %x] ",
 523                          bits);
 524                 strlcat(msg, bitsmsg, msgl);
 525         }
 526
 527         ipath_format_hwerrors(hwerrs,
 528                               ipath_6110_hwerror_msgs,
 529                               sizeof(ipath_6110_hwerror_msgs) /
 530                               sizeof(ipath_6110_hwerror_msgs[0]),
 531                               msg, msgl);
 532
 533         if (hwerrs & (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS))
 534                 hwerr_crcbits(dd, hwerrs, msg, msgl);
 535
 536         if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
 537                 strlcat(msg, "[Memory BIST test failed, InfiniPath hardware unusable]",
 538                         msgl);
 539                 /* ignore from now on, so disable until driver reloaded */
 540                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
 541                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 542                                  dd->ipath_hwerrmask);
 543         }
 544 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |        \
 545                          INFINIPATH_HWE_COREPLL_RFSLIP |        \
 546                          INFINIPATH_HWE_HTBPLL_FBSLIP |         \
 547                          INFINIPATH_HWE_HTBPLL_RFSLIP |         \
 548                          INFINIPATH_HWE_HTAPLL_FBSLIP |         \
 549                          INFINIPATH_HWE_HTAPLL_RFSLIP)
 550
 551         if (hwerrs & _IPATH_PLL_FAIL) {
 552                 snprintf(bitsmsg, sizeof bitsmsg,
 553                          "[PLL failed (%llx), InfiniPath hardware unusable]",
 554                          (unsigned long long) (hwerrs & _IPATH_PLL_FAIL));
 555                 strlcat(msg, bitsmsg, msgl);
 556                 /* ignore from now on, so disable until driver reloaded */
 557                 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
 558                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 559                                  dd->ipath_hwerrmask);
 560         }
 561
 562         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
 563                 /*
 564                  * If it occurs, it is left masked since the eternal
 565                  * interface is unused
 566                  */
 567                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 568                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 569                                  dd->ipath_hwerrmask);
 570         }
 571
 572         if (hwerrs) {
 573                 /*
 574                  * if any set that we aren't ignoring; only
 575                  * make the complaint once, in case it's stuck
 576                  * or recurring, and we get here multiple
 577                  * times.
 578                  * force link down, so switch knows, and
 579                  * LEDs are turned off
 580                  */
 581                 if (dd->ipath_flags & IPATH_INITTED) {
 582                         ipath_set_linkstate(dd, IPATH_IB_LINKDOWN);
 583                         ipath_setup_ht_setextled(dd,
 584                                 INFINIPATH_IBCS_L_STATE_DOWN,
 585                                 INFINIPATH_IBCS_LT_STATE_DISABLED);
 586                         ipath_dev_err(dd, "Fatal Hardware Error (freeze "
 587                                           "mode), no longer usable, SN %.16s\n",
 588                                           dd->ipath_serial);
 589                         isfatal = 1;
 590                 }
 591                 *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
 592                 /* mark as having had error */
 593                 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 594                 /*
 595                  * mark as not usable, at a minimum until driver
 596                  * is reloaded, probably until reboot, since no
 597                  * other reset is possible.
 598                  */
 599                 dd->ipath_flags &= ~IPATH_INITTED;
 600         }
 601         else
 602                 *msg = 0; /* recovered from all of them */
 603         if (*msg)
 604                 ipath_dev_err(dd, "%s hardware error\n", msg);
 605         if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg)
 606                 /*
 607                  * for status file; if no trailing brace is copied,
 608                  * we'll know it was truncated.
 609                  */
 610                 snprintf(dd->ipath_freezemsg,
 611                          dd->ipath_freezelen, "{%s}", msg);
 612
 613 bail:;
 614 }
 615
 616 /**
 617  * ipath_ht_boardname - fill in the board name
 618  * @dd: the infinipath device
 619  * @name: the output buffer
 620  * @namelen: the size of the output buffer
 621  *
 622  * fill in the board name, based on the board revision register
 623  */
 624 static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
 625                               size_t namelen)
 626 {
 627         char *n = NULL;
 628         u8 boardrev = dd->ipath_boardrev;
 629         int ret;
 630
 631         switch (boardrev) {
 632         case 4:         /* Ponderosa is one of the bringup boards */
 633                 n = "Ponderosa";
 634                 break;
 635         case 5:
 636                 /*
 637                  * original production board; two production levels, with
 638                  * different serial number ranges.   See ipath_ht_early_init() for
 639                  * case where we enable IPATH_GPIO_INTR for later serial # range.
 640                  */
 641                 n = "InfiniPath_QHT7040";
 642                 break;
 643         case 6:
 644                 n = "OEM_Board_3";
 645                 break;
 646         case 7:
 647                 /* small form factor production board */
 648                 n = "InfiniPath_QHT7140";
 649                 break;
 650         case 8:
 651                 n = "LS/X-1";
 652                 break;
 653         case 9:         /* Comstock bringup test board */
 654                 n = "Comstock";
 655                 break;
 656         case 10:
 657                 n = "OEM_Board_2";
 658                 break;
 659         case 11:
 660                 n = "InfiniPath_HT-470"; /* obsoleted */
 661                 break;
 662         case 12:
 663                 n = "OEM_Board_4";
 664                 break;
 665         default:                /* don't know, just print the number */
 666                 ipath_dev_err(dd, "Don't yet know about board "
 667                               "with ID %u\n", boardrev);
 668                 snprintf(name, namelen, "Unknown_InfiniPath_QHT7xxx_%u",
 669                          boardrev);
 670                 break;
 671         }
 672         if (n)
 673                 snprintf(name, namelen, "%s", n);
 674
 675         if (dd->ipath_majrev != 3 || (dd->ipath_minrev < 2 ||
 676                 dd->ipath_minrev > 3)) {
 677                 /*
 678                  * This version of the driver only supports Rev 3.2 and 3.3
 679                  */
 680                 ipath_dev_err(dd,
 681                               "Unsupported InfiniPath hardware revision %u.%u!\n",
 682                               dd->ipath_majrev, dd->ipath_minrev);
 683                 ret = 1;
 684                 goto bail;
 685         }
 686         /*
 687          * pkt/word counters are 32 bit, and therefore wrap fast enough
 688          * that we snapshot them from a timer, and maintain 64 bit shadow
 689          * copies
 690          */
 691         dd->ipath_flags |= IPATH_32BITCOUNTERS;
 692         if (dd->ipath_htspeed != 800)
 693                 ipath_dev_err(dd,
 694                               "Incorrectly configured for HT @ %uMHz\n",
 695                               dd->ipath_htspeed);
 696         if (dd->ipath_boardrev == 7 || dd->ipath_boardrev == 11 ||
 697             dd->ipath_boardrev == 6)
 698                 dd->ipath_flags |= IPATH_GPIO_INTR;
 699         else
 700                 dd->ipath_flags |= IPATH_POLL_RX_INTR;
 701         if (dd->ipath_boardrev == 8) {  /* LS/X-1 */
 702                 u64 val;
 703                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
 704                 if (val & INFINIPATH_EXTS_SERDESSEL) {
 705                         /*
 706                          * hardware disabled
 707                          *
 708                          * This means that the chip is hardware disabled,
 709                          * and will not be able to bring up the link,
 710                          * in any case.  We special case this and abort
 711                          * early, to avoid later messages.  We also set
 712                          * the DISABLED status bit
 713                          */
 714                         ipath_dbg("Unit %u is hardware-disabled\n",
 715                                   dd->ipath_unit);
 716                         *dd->ipath_statusp |= IPATH_STATUS_DISABLED;
 717                         /* this value is handled differently */
 718                         ret = 2;
 719                         goto bail;
 720                 }
 721         }
 722         ret = 0;
 723
 724 bail:
 725         return ret;
 726 }
 727
 728 static void ipath_check_htlink(struct ipath_devdata *dd)
 729 {
 730         u8 linkerr, link_off, i;
 731
 732         for (i = 0; i < 2; i++) {
 733                 link_off = dd->ipath_ht_slave_off + i * 4 + 0xd;
 734                 if (pci_read_config_byte(dd->pcidev, link_off, &linkerr))
 735                         dev_info(&dd->pcidev->dev, "Couldn't read "
 736                                  "linkerror%d of HT slave/primary block\n",
 737                                  i);
 738                 else if (linkerr & 0xf0) {
 739                         ipath_cdbg(VERBOSE, "HT linkerr%d bits 0x%x set, "
 740                                    "clearing\n", linkerr >> 4, i);
 741                         /*
 742                          * writing the linkerr bits that are set should
 743                          * clear them
 744                          */
 745                         if (pci_write_config_byte(dd->pcidev, link_off,
 746                                                   linkerr))
 747                                 ipath_dbg("Failed write to clear HT "
 748                                           "linkerror%d\n", i);
 749                         if (pci_read_config_byte(dd->pcidev, link_off,
 750                                                  &linkerr))
 751                                 dev_info(&dd->pcidev->dev,
 752                                          "Couldn't reread linkerror%d of "
 753                                          "HT slave/primary block\n", i);
 754                         else if (linkerr & 0xf0)
 755                                 dev_info(&dd->pcidev->dev,
 756                                          "HT linkerror%d bits 0x%x "
 757                                          "couldn't be cleared\n",
 758                                          i, linkerr >> 4);
 759                 }
 760         }
 761 }
 762
 763 static int ipath_setup_ht_reset(struct ipath_devdata *dd)
 764 {
 765         ipath_dbg("No reset possible for this InfiniPath hardware\n");
 766         return 0;
 767 }
 768
 769 #define HT_INTR_DISC_CONFIG  0x80       /* HT interrupt and discovery cap */
 770 #define HT_INTR_REG_INDEX    2  /* intconfig requires indirect accesses */
 771
 772 /*
 773  * Bits 13-15 of command==0 is slave/primary block.  Clear any HT CRC
 774  * errors.  We only bother to do this at load time, because it's OK if
 775  * it happened before we were loaded (first time after boot/reset),
 776  * but any time after that, it's fatal anyway.  Also need to not check
 777  * for for upper byte errors if we are in 8 bit mode, so figure out
 778  * our width.  For now, at least, also complain if it's 8 bit.
 779  */
 780 static void slave_or_pri_blk(struct ipath_devdata *dd, struct pci_dev *pdev,
 781                              int pos, u8 cap_type)
 782 {
 783         u8 linkwidth = 0, linkerr, link_a_b_off, link_off;
 784         u16 linkctrl = 0;
 785         int i;
 786
 787         dd->ipath_ht_slave_off = pos;
 788         /* command word, master_host bit */
 789         /* master host || slave */
 790         if ((cap_type >> 2) & 1)
 791                 link_a_b_off = 4;
 792         else
 793                 link_a_b_off = 0;
 794         ipath_cdbg(VERBOSE, "HT%u (Link %c) connected to processor\n",
 795                    link_a_b_off ? 1 : 0,
 796                    link_a_b_off ? 'B' : 'A');
 797
 798         link_a_b_off += pos;
 799
 800         /*
 801          * check both link control registers; clear both HT CRC sets if
 802          * necessary.
 803          */
 804         for (i = 0; i < 2; i++) {
 805                 link_off = pos + i * 4 + 0x4;
 806                 if (pci_read_config_word(pdev, link_off, &linkctrl))
 807                         ipath_dev_err(dd, "Couldn't read HT link control%d "
 808                                       "register\n", i);
 809                 else if (linkctrl & (0xf << 8)) {
 810                         ipath_cdbg(VERBOSE, "Clear linkctrl%d CRC Error "
 811                                    "bits %x\n", i, linkctrl & (0xf << 8));
 812                         /*
 813                          * now write them back to clear the error.
 814                          */
 815                         pci_write_config_byte(pdev, link_off,
 816                                               linkctrl & (0xf << 8));
 817                 }
 818         }
 819
 820         /*
 821          * As with HT CRC bits, same for protocol errors that might occur
 822          * during boot.
 823          */
 824         for (i = 0; i < 2; i++) {
 825                 link_off = pos + i * 4 + 0xd;
 826                 if (pci_read_config_byte(pdev, link_off, &linkerr))
 827                         dev_info(&pdev->dev, "Couldn't read linkerror%d "
 828                                  "of HT slave/primary block\n", i);
 829                 else if (linkerr & 0xf0) {
 830                         ipath_cdbg(VERBOSE, "HT linkerr%d bits 0x%x set, "
 831                                    "clearing\n", linkerr >> 4, i);
 832                         /*
 833                          * writing the linkerr bits that are set will clear
 834                          * them
 835                          */
 836                         if (pci_write_config_byte
 837                             (pdev, link_off, linkerr))
 838                                 ipath_dbg("Failed write to clear HT "
 839                                           "linkerror%d\n", i);
 840                         if (pci_read_config_byte(pdev, link_off, &linkerr))
 841                                 dev_info(&pdev->dev, "Couldn't reread "
 842                                          "linkerror%d of HT slave/primary "
 843                                          "block\n", i);
 844                         else if (linkerr & 0xf0)
 845                                 dev_info(&pdev->dev, "HT linkerror%d bits "
 846                                          "0x%x couldn't be cleared\n",
 847                                          i, linkerr >> 4);
 848                 }
 849         }
 850
 851         /*
 852          * this is just for our link to the host, not devices connected
 853          * through tunnel.
 854          */
 855
 856         if (pci_read_config_byte(pdev, link_a_b_off + 7, &linkwidth))
 857                 ipath_dev_err(dd, "Couldn't read HT link width "
 858                               "config register\n");
 859         else {
 860                 u32 width;
 861                 switch (linkwidth & 7) {
 862                 case 5:
 863                         width = 4;
 864                         break;
 865                 case 4:
 866                         width = 2;
 867                         break;
 868                 case 3:
 869                         width = 32;
 870                         break;
 871                 case 1:
 872                         width = 16;
 873                         break;
 874                 case 0:
 875                 default:        /* if wrong, assume 8 bit */
 876                         width = 8;
 877                         break;
 878                 }
 879
 880                 dd->ipath_htwidth = width;
 881
 882                 if (linkwidth != 0x11) {
 883                         ipath_dev_err(dd, "Not configured for 16 bit HT "
 884                                       "(%x)\n", linkwidth);
 885                         if (!(linkwidth & 0xf)) {
 886                                 ipath_dbg("Will ignore HT lane1 errors\n");
 887                                 dd->ipath_flags |= IPATH_8BIT_IN_HT0;
 888                         }
 889                 }
 890         }
 891
 892         /*
 893          * this is just for our link to the host, not devices connected
 894          * through tunnel.
 895          */
 896         if (pci_read_config_byte(pdev, link_a_b_off + 0xd, &linkwidth))
 897                 ipath_dev_err(dd, "Couldn't read HT link frequency "
 898                               "config register\n");
 899         else {
 900                 u32 speed;
 901                 switch (linkwidth & 0xf) {
 902                 case 6:
 903                         speed = 1000;
 904                         break;
 905                 case 5:
 906                         speed = 800;
 907                         break;
 908                 case 4:
 909                         speed = 600;
 910                         break;
 911                 case 3:
 912                         speed = 500;
 913                         break;
 914                 case 2:
 915                         speed = 400;
 916                         break;
 917                 case 1:
 918                         speed = 300;
 919                         break;
 920                 default:
 921                         /*
 922                          * assume reserved and vendor-specific are 200...
 923                          */
 924                 case 0:
 925                         speed = 200;
 926                         break;
 927                 }
 928                 dd->ipath_htspeed = speed;
 929         }
 930 }
 931
 932 static int ipath_ht_intconfig(struct ipath_devdata *dd)
 933 {
 934         int ret;
 935
 936         if (dd->ipath_intconfig) {
 937                 ipath_write_kreg(dd, dd->ipath_kregs->kr_interruptconfig,
 938                                  dd->ipath_intconfig);  /* interrupt address */
 939                 ret = 0;
 940         } else {
 941                 ipath_dev_err(dd, "No interrupts enabled, couldn't setup "
 942                               "interrupt address\n");
 943                 ret = -EINVAL;
 944         }
 945
 946         return ret;
 947 }
 948
 949 static void ipath_ht_irq_update(struct pci_dev *dev, int irq,
 950                                 struct ht_irq_msg *msg)
 951 {
 952         struct ipath_devdata *dd = pci_get_drvdata(dev);
 953         u64 prev_intconfig = dd->ipath_intconfig;
 954
 955         dd->ipath_intconfig = msg->address_lo;
 956         dd->ipath_intconfig |= ((u64) msg->address_hi) << 32;
 957
 958         /*
 959          * If the previous value of dd->ipath_intconfig is zero, we're
 960          * getting configured for the first time, and must not program the
 961          * intconfig register here (it will be programmed later, when the
 962          * hardware is ready).  Otherwise, we should.
 963          */
 964         if (prev_intconfig)
 965                 ipath_ht_intconfig(dd);
 966 }
 967
 968 /**
 969  * ipath_setup_ht_config - setup the interruptconfig register
 970  * @dd: the infinipath device
 971  * @pdev: the PCI device
 972  *
 973  * setup the interruptconfig register from the HT config info.
 974  * Also clear CRC errors in HT linkcontrol, if necessary.
 975  * This is done only for the real hardware.  It is done before
 976  * chip address space is initted, so can't touch infinipath registers
 977  */
 978 static int ipath_setup_ht_config(struct ipath_devdata *dd,
 979                                  struct pci_dev *pdev)
 980 {
 981         int pos, ret;
 982
 983         ret = __ht_create_irq(pdev, 0, ipath_ht_irq_update);
 984         if (ret < 0) {
 985                 ipath_dev_err(dd, "Couldn't create interrupt handler: "
 986                               "err %d\n", ret);
 987                 goto bail;
 988         }
 989         dd->ipath_irq = ret;
 990         ret = 0;
 991
 992         /*
 993          * Handle clearing CRC errors in linkctrl register if necessary.  We
 994          * do this early, before we ever enable errors or hardware errors,
 995          * mostly to avoid causing the chip to enter freeze mode.
 996          */
 997         pos = pci_find_capability(pdev, PCI_CAP_ID_HT);
 998         if (!pos) {
 999                 ipath_dev_err(dd, "Couldn't find HyperTransport "
1000                               "capability; no interrupts\n");
1001                 ret = -ENODEV;
1002                 goto bail;
1003         }
1004         do {
1005                 u8 cap_type;
1006
1007                 /* the HT capability type byte is 3 bytes after the
1008                  * capability byte.
1009                  */
1010                 if (pci_read_config_byte(pdev, pos + 3, &cap_type)) {
1011                         dev_info(&pdev->dev, "Couldn't read config "
1012                                  "command @ %d\n", pos);
1013                         continue;
1014                 }
1015                 if (!(cap_type & 0xE0))
1016                         slave_or_pri_blk(dd, pdev, pos, cap_type);
1017         } while ((pos = pci_find_next_capability(pdev, pos,
1018                                                  PCI_CAP_ID_HT)));
1019
1020 bail:
1021         return ret;
1022 }
1023
1024 /**
1025  * ipath_setup_ht_cleanup - clean up any per-chip chip-specific stuff
1026  * @dd: the infinipath device
1027  *
1028  * Called during driver unload.
1029  * This is currently a nop for the HT chip, not for all chips
1030  */
1031 static void ipath_setup_ht_cleanup(struct ipath_devdata *dd)
1032 {
1033 }
1034
1035 /**
1036  * ipath_setup_ht_setextled - set the state of the two external LEDs
1037  * @dd: the infinipath device
1038  * @lst: the L state
1039  * @ltst: the LT state
1040  *
1041  * Set the state of the two external LEDs, to indicate physical and
1042  * logical state of IB link.   For this chip (at least with recommended
1043  * board pinouts), LED1 is Green (physical state), and LED2 is Yellow
1044  * (logical state)
1045  *
1046  * Note:  We try to match the Mellanox HCA LED behavior as best
1047  * we can.  Green indicates physical link state is OK (something is
1048  * plugged in, and we can train).
1049  * Amber indicates the link is logically up (ACTIVE).
1050  * Mellanox further blinks the amber LED to indicate data packet
1051  * activity, but we have no hardware support for that, so it would
1052  * require waking up every 10-20 msecs and checking the counters
1053  * on the chip, and then turning the LED off if appropriate.  That's
1054  * visible overhead, so not something we will do.
1055  *
1056  */
1057 static void ipath_setup_ht_setextled(struct ipath_devdata *dd,
1058                                      u64 lst, u64 ltst)
1059 {
1060         u64 extctl;
1061
1062         /* the diags use the LED to indicate diag info, so we leave
1063          * the external LED alone when the diags are running */
1064         if (ipath_diag_inuse)
1065                 return;
1066
1067         /*
1068          * start by setting both LED control bits to off, then turn
1069          * on the appropriate bit(s).
1070          */
1071         if (dd->ipath_boardrev == 8) { /* LS/X-1 uses different pins */
1072                 /*
1073                  * major difference is that INFINIPATH_EXTC_LEDGBLERR_OFF
1074                  * is inverted,  because it is normally used to indicate
1075                  * a hardware fault at reset, if there were errors
1076                  */
1077                 extctl = (dd->ipath_extctrl & ~INFINIPATH_EXTC_LEDGBLOK_ON)
1078                         | INFINIPATH_EXTC_LEDGBLERR_OFF;
1079                 if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
1080                         extctl &= ~INFINIPATH_EXTC_LEDGBLERR_OFF;
1081                 if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
1082                         extctl |= INFINIPATH_EXTC_LEDGBLOK_ON;
1083         }
1084         else {
1085                 extctl = dd->ipath_extctrl &
1086                         ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
1087                           INFINIPATH_EXTC_LED2PRIPORT_ON);
1088                 if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
1089                         extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
1090                 if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
1091                         extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
1092         }
1093         dd->ipath_extctrl = extctl;
1094         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
1095 }
1096
1097 static void ipath_init_ht_variables(struct ipath_devdata *dd)
1098 {
1099         dd->ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
1100         dd->ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
1101         dd->ipath_gpio_sda = IPATH_GPIO_SDA;
1102         dd->ipath_gpio_scl = IPATH_GPIO_SCL;
1103
1104         dd->ipath_i_bitsextant =
1105                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
1106                 (INFINIPATH_I_RCVAVAIL_MASK <<
1107                  INFINIPATH_I_RCVAVAIL_SHIFT) |
1108                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
1109                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
1110
1111         dd->ipath_e_bitsextant =
1112                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
1113                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
1114                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
1115                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
1116                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
1117                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
1118                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
1119                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
1120                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
1121                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
1122                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
1123                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
1124                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
1125                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
1126                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
1127                 INFINIPATH_E_HARDWARE;
1128
1129         dd->ipath_hwe_bitsextant =
1130                 (INFINIPATH_HWE_HTCMEMPARITYERR_MASK <<
1131                  INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) |
1132                 (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1133                  INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
1134                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1135                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
1136                 INFINIPATH_HWE_HTCLNKABYTE0CRCERR |
1137                 INFINIPATH_HWE_HTCLNKABYTE1CRCERR |
1138                 INFINIPATH_HWE_HTCLNKBBYTE0CRCERR |
1139                 INFINIPATH_HWE_HTCLNKBBYTE1CRCERR |
1140                 INFINIPATH_HWE_HTCMISCERR4 |
1141                 INFINIPATH_HWE_HTCMISCERR5 | INFINIPATH_HWE_HTCMISCERR6 |
1142                 INFINIPATH_HWE_HTCMISCERR7 |
1143                 INFINIPATH_HWE_HTCBUSTREQPARITYERR |
1144                 INFINIPATH_HWE_HTCBUSTRESPPARITYERR |
1145                 INFINIPATH_HWE_HTCBUSIREQPARITYERR |
1146                 INFINIPATH_HWE_RXDSYNCMEMPARITYERR |
1147                 INFINIPATH_HWE_MEMBISTFAILED |
1148                 INFINIPATH_HWE_COREPLL_FBSLIP |
1149                 INFINIPATH_HWE_COREPLL_RFSLIP |
1150                 INFINIPATH_HWE_HTBPLL_FBSLIP |
1151                 INFINIPATH_HWE_HTBPLL_RFSLIP |
1152                 INFINIPATH_HWE_HTAPLL_FBSLIP |
1153                 INFINIPATH_HWE_HTAPLL_RFSLIP |
1154                 INFINIPATH_HWE_SERDESPLLFAILED |
1155                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
1156                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
1157
1158         dd->ipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
1159         dd->ipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
1160 }
1161
1162 /**
1163  * ipath_ht_init_hwerrors - enable hardware errors
1164  * @dd: the infinipath device
1165  *
1166  * now that we have finished initializing everything that might reasonably
1167  * cause a hardware error, and cleared those errors bits as they occur,
1168  * we can enable hardware errors in the mask (potentially enabling
1169  * freeze mode), and enable hardware errors as errors (along with
1170  * everything else) in errormask
1171  */
1172 static void ipath_ht_init_hwerrors(struct ipath_devdata *dd)
1173 {
1174         ipath_err_t val;
1175         u64 extsval;
1176
1177         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
1178
1179         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
1180                 ipath_dev_err(dd, "MemBIST did not complete!\n");
1181         if (extsval & INFINIPATH_EXTS_MEMBIST_CORRECT)
1182                 ipath_dbg("MemBIST corrected\n");
1183
1184         ipath_check_htlink(dd);
1185
1186         /* barring bugs, all hwerrors become interrupts, which can */
1187         val = -1LL;
1188         /* don't look at crc lane1 if 8 bit */
1189         if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
1190                 val &= ~infinipath_hwe_htclnkabyte1crcerr;
1191         /* don't look at crc lane1 if 8 bit */
1192         if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
1193                 val &= ~infinipath_hwe_htclnkbbyte1crcerr;
1194
1195         /*
1196          * disable RXDSYNCMEMPARITY because external serdes is unused,
1197          * and therefore the logic will never be used or initialized,
1198          * and uninitialized state will normally result in this error
1199          * being asserted.  Similarly for the external serdess pll
1200          * lock signal.
1201          */
1202         val &= ~(INFINIPATH_HWE_SERDESPLLFAILED |
1203                  INFINIPATH_HWE_RXDSYNCMEMPARITYERR);
1204
1205         /*
1206          * Disable MISCERR4 because of an inversion in the HT core
1207          * logic checking for errors that cause this bit to be set.
1208          * The errata can also cause the protocol error bit to be set
1209          * in the HT config space linkerror register(s).
1210          */
1211         val &= ~INFINIPATH_HWE_HTCMISCERR4;
1212
1213         /*
1214          * PLL ignored because MDIO interface has a logic problem
1215          * for reads, on Comstock and Ponderosa.  BRINGUP
1216          */
1217         if (dd->ipath_boardrev == 4 || dd->ipath_boardrev == 9)
1218                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
1219         dd->ipath_hwerrmask = val;
1220 }
1221
1222 /**
1223  * ipath_ht_bringup_serdes - bring up the serdes
1224  * @dd: the infinipath device
1225  */
1226 static int ipath_ht_bringup_serdes(struct ipath_devdata *dd)
1227 {
1228         u64 val, config1;
1229         int ret = 0, change = 0;
1230
1231         ipath_dbg("Trying to bringup serdes\n");
1232
1233         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
1234             INFINIPATH_HWE_SERDESPLLFAILED)
1235         {
1236                 ipath_dbg("At start, serdes PLL failed bit set in "
1237                           "hwerrstatus, clearing and continuing\n");
1238                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
1239                                  INFINIPATH_HWE_SERDESPLLFAILED);
1240         }
1241
1242         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1243         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
1244
1245         ipath_cdbg(VERBOSE, "Initial serdes status is config0=%llx "
1246                    "config1=%llx, sstatus=%llx xgxs %llx\n",
1247                    (unsigned long long) val, (unsigned long long) config1,
1248                    (unsigned long long)
1249                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
1250                    (unsigned long long)
1251                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
1252
1253         /* force reset on */
1254         val |= INFINIPATH_SERDC0_RESET_PLL
1255                 /* | INFINIPATH_SERDC0_RESET_MASK */
1256                 ;
1257         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
1258         udelay(15);             /* need pll reset set at least for a bit */
1259
1260         if (val & INFINIPATH_SERDC0_RESET_PLL) {
1261                 u64 val2 = val &= ~INFINIPATH_SERDC0_RESET_PLL;
1262                 /* set lane resets, and tx idle, during pll reset */
1263                 val2 |= INFINIPATH_SERDC0_RESET_MASK |
1264                         INFINIPATH_SERDC0_TXIDLE;
1265                 ipath_cdbg(VERBOSE, "Clearing serdes PLL reset (writing "
1266                            "%llx)\n", (unsigned long long) val2);
1267                 ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0,
1268                                  val2);
1269                 /*
1270                  * be sure chip saw it
1271                  */
1272                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
1273                 /*
1274                  * need pll reset clear at least 11 usec before lane
1275                  * resets cleared; give it a few more
1276                  */
1277                 udelay(15);
1278                 val = val2;     /* for check below */
1279         }
1280
1281         if (val & (INFINIPATH_SERDC0_RESET_PLL |
1282                    INFINIPATH_SERDC0_RESET_MASK |
1283                    INFINIPATH_SERDC0_TXIDLE)) {
1284                 val &= ~(INFINIPATH_SERDC0_RESET_PLL |
1285                          INFINIPATH_SERDC0_RESET_MASK |
1286                          INFINIPATH_SERDC0_TXIDLE);
1287                 /* clear them */
1288                 ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0,
1289                                  val);
1290         }
1291
1292         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1293         if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
1294              INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
1295                 val &= ~(INFINIPATH_XGXS_MDIOADDR_MASK <<
1296                          INFINIPATH_XGXS_MDIOADDR_SHIFT);
1297                 /*
1298                  * we use address 3
1299                  */
1300                 val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
1301                 change = 1;
1302         }
1303         if (val & INFINIPATH_XGXS_RESET) {
1304                 /* normally true after boot */
1305                 val &= ~INFINIPATH_XGXS_RESET;
1306                 change = 1;
1307         }
1308         if (((val >> INFINIPATH_XGXS_RX_POL_SHIFT) &
1309              INFINIPATH_XGXS_RX_POL_MASK) != dd->ipath_rx_pol_inv ) {
1310                 /* need to compensate for Tx inversion in partner */
1311                 val &= ~(INFINIPATH_XGXS_RX_POL_MASK <<
1312                          INFINIPATH_XGXS_RX_POL_SHIFT);
1313                 val |= dd->ipath_rx_pol_inv <<
1314                         INFINIPATH_XGXS_RX_POL_SHIFT;
1315                 change = 1;
1316         }
1317         if (change)
1318                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1319
1320         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1321
1322         /* clear current and de-emphasis bits */
1323         config1 &= ~0x0ffffffff00ULL;
1324         /* set current to 20ma */
1325         config1 |= 0x00000000000ULL;
1326         /* set de-emphasis to -5.68dB */
1327         config1 |= 0x0cccc000000ULL;
1328         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
1329
1330         ipath_cdbg(VERBOSE, "After setup: serdes status is config0=%llx "
1331                    "config1=%llx, sstatus=%llx xgxs %llx\n",
1332                    (unsigned long long) val, (unsigned long long) config1,
1333                    (unsigned long long)
1334                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
1335                    (unsigned long long)
1336                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
1337
1338         if (!ipath_waitfor_mdio_cmdready(dd)) {
1339                 ipath_write_kreg(dd, dd->ipath_kregs->kr_mdio,
1340                                  ipath_mdio_req(IPATH_MDIO_CMD_READ, 31,
1341                                                 IPATH_MDIO_CTRL_XGXS_REG_8,
1342                                                 0));
1343                 if (ipath_waitfor_complete(dd, dd->ipath_kregs->kr_mdio,
1344                                            IPATH_MDIO_DATAVALID, &val))
1345                         ipath_dbg("Never got MDIO data for XGXS status "
1346                                   "read\n");
1347                 else
1348                         ipath_cdbg(VERBOSE, "MDIO Read reg8, "
1349                                    "'bank' 31 %x\n", (u32) val);
1350         } else
1351                 ipath_dbg("Never got MDIO cmdready for XGXS status read\n");
1352
1353         return ret;             /* for now, say we always succeeded */
1354 }
1355
1356 /**
1357  * ipath_ht_quiet_serdes - set serdes to txidle
1358  * @dd: the infinipath device
1359  * driver is being unloaded
1360  */
1361 static void ipath_ht_quiet_serdes(struct ipath_devdata *dd)
1362 {
1363         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1364
1365         val |= INFINIPATH_SERDC0_TXIDLE;
1366         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
1367                   (unsigned long long) val);
1368         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
1369 }
1370
1371 /**
1372  * ipath_pe_put_tid - write a TID in chip
1373  * @dd: the infinipath device
1374  * @tidptr: pointer to the expected TID (in chip) to udpate
1375  * @tidtype: 0 for eager, 1 for expected
1376  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1377  *
1378  * This exists as a separate routine to allow for special locking etc.
1379  * It's used for both the full cleanup on exit, as well as the normal
1380  * setup and teardown.
1381  */
1382 static void ipath_ht_put_tid(struct ipath_devdata *dd,
1383                              u64 __iomem *tidptr, u32 type,
1384                              unsigned long pa)
1385 {
1386         if (!dd->ipath_kregbase)
1387                 return;
1388
1389         if (pa != dd->ipath_tidinvalid) {
1390                 if (unlikely((pa & ~INFINIPATH_RT_ADDR_MASK))) {
1391                         dev_info(&dd->pcidev->dev,
1392                                  "physaddr %lx has more than "
1393                                  "40 bits, using only 40!!!\n", pa);
1394                         pa &= INFINIPATH_RT_ADDR_MASK;
1395                 }
1396                 if (type == 0)
1397                         pa |= dd->ipath_tidtemplate;
1398                 else {
1399                         /* in words (fixed, full page).  */
1400                         u64 lenvalid = PAGE_SIZE >> 2;
1401                         lenvalid <<= INFINIPATH_RT_BUFSIZE_SHIFT;
1402                         pa |= lenvalid | INFINIPATH_RT_VALID;
1403                 }
1404         }
1405         writeq(pa, tidptr);
1406 }
1407
1408
1409 /**
1410  * ipath_ht_clear_tid - clear all TID entries for a port, expected and eager
1411  * @dd: the infinipath device
1412  * @port: the port
1413  *
1414  * Used from ipath_close(), and at chip initialization.
1415  */
1416 static void ipath_ht_clear_tids(struct ipath_devdata *dd, unsigned port)
1417 {
1418         u64 __iomem *tidbase;
1419         int i;
1420
1421         if (!dd->ipath_kregbase)
1422                 return;
1423
1424         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1425
1426         /*
1427          * need to invalidate all of the expected TID entries for this
1428          * port, so we don't have valid entries that might somehow get
1429          * used (early in next use of this port, or through some bug)
1430          */
1431         tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
1432                                    dd->ipath_rcvtidbase +
1433                                    port * dd->ipath_rcvtidcnt *
1434                                    sizeof(*tidbase));
1435         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1436                 ipath_ht_put_tid(dd, &tidbase[i], 1, dd->ipath_tidinvalid);
1437
1438         tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
1439                                    dd->ipath_rcvegrbase +
1440                                    port * dd->ipath_rcvegrcnt *
1441                                    sizeof(*tidbase));
1442
1443         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1444                 ipath_ht_put_tid(dd, &tidbase[i], 0, dd->ipath_tidinvalid);
1445 }
1446
1447 /**
1448  * ipath_ht_tidtemplate - setup constants for TID updates
1449  * @dd: the infinipath device
1450  *
1451  * We setup stuff that we use a lot, to avoid calculating each time
1452  */
1453 static void ipath_ht_tidtemplate(struct ipath_devdata *dd)
1454 {
1455         dd->ipath_tidtemplate = dd->ipath_ibmaxlen >> 2;
1456         dd->ipath_tidtemplate <<= INFINIPATH_RT_BUFSIZE_SHIFT;
1457         dd->ipath_tidtemplate |= INFINIPATH_RT_VALID;
1458
1459         /*
1460          * work around chip errata bug 7358, by marking invalid tids
1461          * as having max length
1462          */
1463         dd->ipath_tidinvalid = (-1LL & INFINIPATH_RT_BUFSIZE_MASK) <<
1464                 INFINIPATH_RT_BUFSIZE_SHIFT;
1465 }
1466
1467 static int ipath_ht_early_init(struct ipath_devdata *dd)
1468 {
1469         u32 __iomem *piobuf;
1470         u32 pioincr, val32;
1471         int i;
1472
1473         /*
1474          * one cache line; long IB headers will spill over into received
1475          * buffer
1476          */
1477         dd->ipath_rcvhdrentsize = 16;
1478         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1479
1480         /*
1481          * For HT, we allocate a somewhat overly large eager buffer,
1482          * such that we can guarantee that we can receive the largest
1483          * packet that we can send out.  To truly support a 4KB MTU,
1484          * we need to bump this to a large value.  To date, other than
1485          * testing, we have never encountered an HCA that can really
1486          * send 4KB MTU packets, so we do not handle that (we'll get
1487          * errors interrupts if we ever see one).
1488          */
1489         dd->ipath_rcvegrbufsize = dd->ipath_piosize2k;
1490
1491         /*
1492          * the min() check here is currently a nop, but it may not
1493          * always be, depending on just how we do ipath_rcvegrbufsize
1494          */
1495         dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
1496                                  dd->ipath_rcvegrbufsize);
1497         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1498         ipath_ht_tidtemplate(dd);
1499
1500         /*
1501          * zero all the TID entries at startup.  We do this for sanity,
1502          * in case of a previous driver crash of some kind, and also
1503          * because the chip powers up with these memories in an unknown
1504          * state.  Use portcnt, not cfgports, since this is for the
1505          * full chip, not for current (possibly different) configuration
1506          * value.
1507          * Chip Errata bug 6447
1508          */
1509         for (val32 = 0; val32 < dd->ipath_portcnt; val32++)
1510                 ipath_ht_clear_tids(dd, val32);
1511
1512         /*
1513          * write the pbc of each buffer, to be sure it's initialized, then
1514          * cancel all the buffers, and also abort any packets that might
1515          * have been in flight for some reason (the latter is for driver
1516          * unload/reload, but isn't a bad idea at first init).  PIO send
1517          * isn't enabled at this point, so there is no danger of sending
1518          * these out on the wire.
1519          * Chip Errata bug 6610
1520          */
1521         piobuf = (u32 __iomem *) (((char __iomem *)(dd->ipath_kregbase)) +
1522                                   dd->ipath_piobufbase);
1523         pioincr = dd->ipath_palign / sizeof(*piobuf);
1524         for (i = 0; i < dd->ipath_piobcnt2k; i++) {
1525                 /*
1526                  * reasonable word count, just to init pbc
1527                  */
1528                 writel(16, piobuf);
1529                 piobuf += pioincr;
1530         }
1531         /*
1532          * self-clearing
1533          */
1534         ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
1535                          INFINIPATH_S_ABORT);
1536
1537         ipath_get_eeprom_info(dd);
1538         if (dd->ipath_boardrev == 5 && dd->ipath_serial[0] == '1' &&
1539                 dd->ipath_serial[1] == '2' && dd->ipath_serial[2] == '8') {
1540                 /*
1541                  * Later production QHT7040 has same changes as QHT7140, so
1542                  * can use GPIO interrupts.  They have serial #'s starting
1543                  * with 128, rather than 112.
1544                  */
1545                 dd->ipath_flags |= IPATH_GPIO_INTR;
1546                 dd->ipath_flags &= ~IPATH_POLL_RX_INTR;
1547         }
1548         return 0;
1549 }
1550
1551
1552 static int ipath_ht_txe_recover(struct ipath_devdata *dd)
1553 {
1554         int cnt = ++ipath_stats.sps_txeparity;
1555         if (cnt >= IPATH_MAX_PARITY_ATTEMPTS)  {
1556                 if (cnt == IPATH_MAX_PARITY_ATTEMPTS)
1557                         ipath_dev_err(dd,
1558                                 "Too many attempts to recover from "
1559                                 "TXE parity, giving up\n");
1560                 return 0;
1561         }
1562         dev_info(&dd->pcidev->dev,
1563                 "Recovering from TXE PIO parity error\n");
1564         ipath_disarm_senderrbufs(dd, 1);
1565         return 1;
1566 }
1567
1568
1569 /**
1570  * ipath_init_ht_get_base_info - set chip-specific flags for user code
1571  * @dd: the infinipath device
1572  * @kbase: ipath_base_info pointer
1573  *
1574  * We set the PCIE flag because the lower bandwidth on PCIe vs
1575  * HyperTransport can affect some user packet algorithms.
1576  */
1577 static int ipath_ht_get_base_info(struct ipath_portdata *pd, void *kbase)
1578 {
1579         struct ipath_base_info *kinfo = kbase;
1580
1581         kinfo->spi_runtime_flags |= IPATH_RUNTIME_HT |
1582                 IPATH_RUNTIME_RCVHDR_COPY;
1583
1584         return 0;
1585 }
1586
1587 static void ipath_ht_free_irq(struct ipath_devdata *dd)
1588 {
1589         free_irq(dd->ipath_irq, dd);
1590         ht_destroy_irq(dd->ipath_irq);
1591         dd->ipath_irq = 0;
1592         dd->ipath_intconfig = 0;
1593 }
1594
1595 /**
1596  * ipath_init_iba6110_funcs - set up the chip-specific function pointers
1597  * @dd: the infinipath device
1598  *
1599  * This is global, and is called directly at init to set up the
1600  * chip-specific function pointers for later use.
1601  */
1602 void ipath_init_iba6110_funcs(struct ipath_devdata *dd)
1603 {
1604         dd->ipath_f_intrsetup = ipath_ht_intconfig;
1605         dd->ipath_f_bus = ipath_setup_ht_config;
1606         dd->ipath_f_reset = ipath_setup_ht_reset;
1607         dd->ipath_f_get_boardname = ipath_ht_boardname;
1608         dd->ipath_f_init_hwerrors = ipath_ht_init_hwerrors;
1609         dd->ipath_f_early_init = ipath_ht_early_init;
1610         dd->ipath_f_handle_hwerrors = ipath_ht_handle_hwerrors;
1611         dd->ipath_f_quiet_serdes = ipath_ht_quiet_serdes;
1612         dd->ipath_f_bringup_serdes = ipath_ht_bringup_serdes;
1613         dd->ipath_f_clear_tids = ipath_ht_clear_tids;
1614         dd->ipath_f_put_tid = ipath_ht_put_tid;
1615         dd->ipath_f_cleanup = ipath_setup_ht_cleanup;
1616         dd->ipath_f_setextled = ipath_setup_ht_setextled;
1617         dd->ipath_f_get_base_info = ipath_ht_get_base_info;
1618         dd->ipath_f_free_irq = ipath_ht_free_irq;
1619
1620         /*
1621          * initialize chip-specific variables
1622          */
1623         dd->ipath_f_tidtemplate = ipath_ht_tidtemplate;
1624
1625         /*
1626          * setup the register offsets, since they are different for each
1627          * chip
1628          */
1629         dd->ipath_kregs = &ipath_ht_kregs;
1630         dd->ipath_cregs = &ipath_ht_cregs;
1631
1632         /*
1633          * do very early init that is needed before ipath_f_bus is
1634          * called
1635          */
1636         ipath_init_ht_variables(dd);
1637 }