drivers/infiniband/hw/ipath/ipath_ht400.c

   1 /*
   2  * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 /*
  34  * This file contains all of the code that is specific to the InfiniPath
  35  * HT-400 chip.
  36  */
  37
  38 #include <linux/pci.h>
  39 #include <linux/delay.h>
  40
  41 #include "ipath_kernel.h"
  42 #include "ipath_registers.h"
  43
  44 /*
  45  * This lists the InfiniPath HT400 registers, in the actual chip layout.
  46  * This structure should never be directly accessed.
  47  *
  48  * The names are in InterCap form because they're taken straight from
  49  * the chip specification.  Since they're only used in this file, they
  50  * don't pollute the rest of the source.
  51 */
  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 DebugPort;
  60         unsigned long long SendRegBase;
  61         unsigned long long UserRegBase;
  62         unsigned long long CounterRegBase;
  63         unsigned long long Scratch;
  64         unsigned long long ReservedMisc1;
  65         unsigned long long InterruptConfig;
  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 ReservedRcv[10];
 101         unsigned long long SendCtrl;
 102         unsigned long long SendPIOBufBase;
 103         unsigned long long SendPIOSize;
 104         unsigned long long SendPIOBufCnt;
 105         unsigned long long SendPIOAvailAddr;
 106         unsigned long long TxIntMemBase;
 107         unsigned long long TxIntMemSize;
 108         unsigned long long ReservedSend[9];
 109         unsigned long long SendBufferError;
 110         unsigned long long SendBufferErrorCONT1;
 111         unsigned long long SendBufferErrorCONT2;
 112         unsigned long long SendBufferErrorCONT3;
 113         unsigned long long ReservedSBE[4];
 114         unsigned long long RcvHdrAddr0;
 115         unsigned long long RcvHdrAddr1;
 116         unsigned long long RcvHdrAddr2;
 117         unsigned long long RcvHdrAddr3;
 118         unsigned long long RcvHdrAddr4;
 119         unsigned long long RcvHdrAddr5;
 120         unsigned long long RcvHdrAddr6;
 121         unsigned long long RcvHdrAddr7;
 122         unsigned long long RcvHdrAddr8;
 123         unsigned long long ReservedRHA[7];
 124         unsigned long long RcvHdrTailAddr0;
 125         unsigned long long RcvHdrTailAddr1;
 126         unsigned long long RcvHdrTailAddr2;
 127         unsigned long long RcvHdrTailAddr3;
 128         unsigned long long RcvHdrTailAddr4;
 129         unsigned long long RcvHdrTailAddr5;
 130         unsigned long long RcvHdrTailAddr6;
 131         unsigned long long RcvHdrTailAddr7;
 132         unsigned long long RcvHdrTailAddr8;
 133         unsigned long long ReservedRHTA[7];
 134         unsigned long long Sync;        /* Software only */
 135         unsigned long long Dump;        /* Software only */
 136         unsigned long long SimVer;      /* Software only */
 137         unsigned long long ReservedSW[5];
 138         unsigned long long SerdesConfig0;
 139         unsigned long long SerdesConfig1;
 140         unsigned long long SerdesStatus;
 141         unsigned long long XGXSConfig;
 142         unsigned long long ReservedSW2[4];
 143 };
 144
 145 #define IPATH_KREG_OFFSET(field) (offsetof(struct \
 146     _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
 147 #define IPATH_CREG_OFFSET(field) (offsetof( \
 148     struct infinipath_counters, field) / sizeof(u64))
 149
 150 static const struct ipath_kregs ipath_ht_kregs = {
 151         .kr_control = IPATH_KREG_OFFSET(Control),
 152         .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
 153         .kr_debugport = IPATH_KREG_OFFSET(DebugPort),
 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_interruptconfig = IPATH_KREG_OFFSET(InterruptConfig),
 173         .kr_intmask = IPATH_KREG_OFFSET(IntMask),
 174         .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
 175         .kr_mdio = IPATH_KREG_OFFSET(MDIO),
 176         .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
 177         .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
 178         .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
 179         .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
 180         .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
 181         .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
 182         .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
 183         .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
 184         .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
 185         .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
 186         .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
 187         .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
 188         .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
 189         .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
 190         .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
 191         .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
 192         .kr_revision = IPATH_KREG_OFFSET(Revision),
 193         .kr_scratch = IPATH_KREG_OFFSET(Scratch),
 194         .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
 195         .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
 196         .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
 197         .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
 198         .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
 199         .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
 200         .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
 201         .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
 202         .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
 203         .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
 204         .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
 205         .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
 206         .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
 207         .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
 208         /*
 209          * These should not be used directly via ipath_read_kreg64(),
 210          * use them with ipath_read_kreg64_port(),
 211          */
 212         .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
 213         .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0)
 214 };
 215
 216 static const struct ipath_cregs ipath_ht_cregs = {
 217         .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
 218         .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
 219         .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
 220         .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
 221         .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
 222         .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
 223         .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
 224         .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
 225         .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
 226         .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
 227         .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
 228         .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
 229         /* calc from Reg_CounterRegBase + offset */
 230         .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
 231         .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
 232         .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
 233         .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
 234         .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
 235         .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
 236         .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
 237         .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
 238         .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
 239         .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
 240         .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
 241         .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
 242         .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
 243         .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
 244         .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
 245         .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
 246         .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
 247         .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
 248         .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
 249         .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
 250         .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
 251 };
 252
 253 /* kr_intstatus, kr_intclear, kr_intmask bits */
 254 #define INFINIPATH_I_RCVURG_MASK 0x1FF
 255 #define INFINIPATH_I_RCVAVAIL_MASK 0x1FF
 256
 257 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 258 #define INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT 0
 259 #define INFINIPATH_HWE_HTCMEMPARITYERR_MASK 0x3FFFFFULL
 260 #define INFINIPATH_HWE_HTCLNKABYTE0CRCERR   0x0000000000800000ULL
 261 #define INFINIPATH_HWE_HTCLNKABYTE1CRCERR   0x0000000001000000ULL
 262 #define INFINIPATH_HWE_HTCLNKBBYTE0CRCERR   0x0000000002000000ULL
 263 #define INFINIPATH_HWE_HTCLNKBBYTE1CRCERR   0x0000000004000000ULL
 264 #define INFINIPATH_HWE_HTCMISCERR4          0x0000000008000000ULL
 265 #define INFINIPATH_HWE_HTCMISCERR5          0x0000000010000000ULL
 266 #define INFINIPATH_HWE_HTCMISCERR6          0x0000000020000000ULL
 267 #define INFINIPATH_HWE_HTCMISCERR7          0x0000000040000000ULL
 268 #define INFINIPATH_HWE_HTCBUSTREQPARITYERR  0x0000000080000000ULL
 269 #define INFINIPATH_HWE_HTCBUSTRESPPARITYERR 0x0000000100000000ULL
 270 #define INFINIPATH_HWE_HTCBUSIREQPARITYERR  0x0000000200000000ULL
 271 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 272 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 273 #define INFINIPATH_HWE_HTBPLL_FBSLIP        0x0200000000000000ULL
 274 #define INFINIPATH_HWE_HTBPLL_RFSLIP        0x0400000000000000ULL
 275 #define INFINIPATH_HWE_HTAPLL_FBSLIP        0x0800000000000000ULL
 276 #define INFINIPATH_HWE_HTAPLL_RFSLIP        0x1000000000000000ULL
 277 #define INFINIPATH_HWE_SERDESPLLFAILED      0x2000000000000000ULL
 278
 279 /* kr_extstatus bits */
 280 #define INFINIPATH_EXTS_FREQSEL 0x2
 281 #define INFINIPATH_EXTS_SERDESSEL 0x4
 282 #define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 283 #define INFINIPATH_EXTS_MEMBIST_CORRECT     0x0000000000008000
 284
 285 /*
 286  * masks and bits that are different in different chips, or present only
 287  * in one
 288  */
 289 static const ipath_err_t infinipath_hwe_htcmemparityerr_mask =
 290     INFINIPATH_HWE_HTCMEMPARITYERR_MASK;
 291 static const ipath_err_t infinipath_hwe_htcmemparityerr_shift =
 292     INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT;
 293
 294 static const ipath_err_t infinipath_hwe_htclnkabyte0crcerr =
 295     INFINIPATH_HWE_HTCLNKABYTE0CRCERR;
 296 static const ipath_err_t infinipath_hwe_htclnkabyte1crcerr =
 297     INFINIPATH_HWE_HTCLNKABYTE1CRCERR;
 298 static const ipath_err_t infinipath_hwe_htclnkbbyte0crcerr =
 299     INFINIPATH_HWE_HTCLNKBBYTE0CRCERR;
 300 static const ipath_err_t infinipath_hwe_htclnkbbyte1crcerr =
 301     INFINIPATH_HWE_HTCLNKBBYTE1CRCERR;
 302
 303 #define _IPATH_GPIO_SDA_NUM 1
 304 #define _IPATH_GPIO_SCL_NUM 0
 305
 306 #define IPATH_GPIO_SDA \
 307         (1ULL << (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 308 #define IPATH_GPIO_SCL \
 309         (1ULL << (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 310
 311 /* keep the code below somewhat more readonable; not used elsewhere */
 312 #define _IPATH_HTLINK0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr |     \
 313                                 infinipath_hwe_htclnkabyte1crcerr)
 314 #define _IPATH_HTLINK1_CRCBITS (infinipath_hwe_htclnkbbyte0crcerr |     \
 315                                 infinipath_hwe_htclnkbbyte1crcerr)
 316 #define _IPATH_HTLANE0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr |     \
 317                                 infinipath_hwe_htclnkbbyte0crcerr)
 318 #define _IPATH_HTLANE1_CRCBITS (infinipath_hwe_htclnkabyte1crcerr |     \
 319                                 infinipath_hwe_htclnkbbyte1crcerr)
 320
 321 static void hwerr_crcbits(struct ipath_devdata *dd, ipath_err_t hwerrs,
 322                           char *msg, size_t msgl)
 323 {
 324         char bitsmsg[64];
 325         ipath_err_t crcbits = hwerrs &
 326                 (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS);
 327         /* don't check if 8bit HT */
 328         if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
 329                 crcbits &= ~infinipath_hwe_htclnkabyte1crcerr;
 330         /* don't check if 8bit HT */
 331         if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
 332                 crcbits &= ~infinipath_hwe_htclnkbbyte1crcerr;
 333         /*
 334          * we'll want to ignore link errors on link that is
 335          * not in use, if any.  For now, complain about both
 336          */
 337         if (crcbits) {
 338                 u16 ctrl0, ctrl1;
 339                 snprintf(bitsmsg, sizeof bitsmsg,
 340                          "[HT%s lane %s CRC (%llx); ignore till reload]",
 341                          !(crcbits & _IPATH_HTLINK1_CRCBITS) ?
 342                          "0 (A)" : (!(crcbits & _IPATH_HTLINK0_CRCBITS)
 343                                     ? "1 (B)" : "0+1 (A+B)"),
 344                          !(crcbits & _IPATH_HTLANE1_CRCBITS) ? "0"
 345                          : (!(crcbits & _IPATH_HTLANE0_CRCBITS) ? "1" :
 346                             "0+1"), (unsigned long long) crcbits);
 347                 strlcat(msg, bitsmsg, msgl);
 348
 349                 /*
 350                  * print extra info for debugging.  slave/primary
 351                  * config word 4, 8 (link control 0, 1)
 352                  */
 353
 354                 if (pci_read_config_word(dd->pcidev,
 355                                          dd->ipath_ht_slave_off + 0x4,
 356                                          &ctrl0))
 357                         dev_info(&dd->pcidev->dev, "Couldn't read "
 358                                  "linkctrl0 of slave/primary "
 359                                  "config block\n");
 360                 else if (!(ctrl0 & 1 << 6))
 361                         /* not if EOC bit set */
 362                         ipath_dbg("HT linkctrl0 0x%x%s%s\n", ctrl0,
 363                                   ((ctrl0 >> 8) & 7) ? " CRC" : "",
 364                                   ((ctrl0 >> 4) & 1) ? "linkfail" :
 365                                   "");
 366                 if (pci_read_config_word(dd->pcidev,
 367                                          dd->ipath_ht_slave_off + 0x8,
 368                                          &ctrl1))
 369                         dev_info(&dd->pcidev->dev, "Couldn't read "
 370                                  "linkctrl1 of slave/primary "
 371                                  "config block\n");
 372                 else if (!(ctrl1 & 1 << 6))
 373                         /* not if EOC bit set */
 374                         ipath_dbg("HT linkctrl1 0x%x%s%s\n", ctrl1,
 375                                   ((ctrl1 >> 8) & 7) ? " CRC" : "",
 376                                   ((ctrl1 >> 4) & 1) ? "linkfail" :
 377                                   "");
 378
 379                 /* disable until driver reloaded */
 380                 dd->ipath_hwerrmask &= ~crcbits;
 381                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 382                                  dd->ipath_hwerrmask);
 383                 ipath_dbg("HT crc errs: %s\n", msg);
 384         } else
 385                 ipath_dbg("ignoring HT crc errors 0x%llx, "
 386                           "not in use\n", (unsigned long long)
 387                           (hwerrs & (_IPATH_HTLINK0_CRCBITS |
 388                                      _IPATH_HTLINK1_CRCBITS)));
 389 }
 390
 391 /**
 392  * ipath_ht_handle_hwerrors - display hardware errors
 393  * @dd: the infinipath device
 394  * @msg: the output buffer
 395  * @msgl: the size of the output buffer
 396  *
 397  * Use same msg buffer as regular errors to avoid
 398  * excessive stack use.  Most hardware errors are catastrophic, but for
 399  * right now, we'll print them and continue.
 400  * We reuse the same message buffer as ipath_handle_errors() to avoid
 401  * excessive stack usage.
 402  */
 403 static void ipath_ht_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 404                                      size_t msgl)
 405 {
 406         ipath_err_t hwerrs;
 407         u32 bits, ctrl;
 408         int isfatal = 0;
 409         char bitsmsg[64];
 410
 411         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 412
 413         if (!hwerrs) {
 414                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 415                 /*
 416                  * better than printing cofusing messages
 417                  * This seems to be related to clearing the crc error, or
 418                  * the pll error during init.
 419                  */
 420                 goto bail;
 421         } else if (hwerrs == -1LL) {
 422                 ipath_dev_err(dd, "Read of hardware error status failed "
 423                               "(all bits set); ignoring\n");
 424                 goto bail;
 425         }
 426         ipath_stats.sps_hwerrs++;
 427
 428         /* Always clear the error status register, except MEMBISTFAIL,
 429          * regardless of whether we continue or stop using the chip.
 430          * We want that set so we know it failed, even across driver reload.
 431          * We'll still ignore it in the hwerrmask.  We do this partly for
 432          * diagnostics, but also for support */
 433         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 434                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 435
 436         hwerrs &= dd->ipath_hwerrmask;
 437
 438         /*
 439          * make sure we get this much out, unless told to be quiet,
 440          * or it's occurred within the last 5 seconds
 441          */
 442         if ((hwerrs & ~dd->ipath_lasthwerror) ||
 443             (ipath_debug & __IPATH_VERBDBG))
 444                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 445                          "(cleared)\n", (unsigned long long) hwerrs);
 446         dd->ipath_lasthwerror |= hwerrs;
 447
 448         if (hwerrs & ~infinipath_hwe_bitsextant)
 449                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 450                               "%llx set\n", (unsigned long long)
 451                               (hwerrs & ~infinipath_hwe_bitsextant));
 452
 453         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 454         if (ctrl & INFINIPATH_C_FREEZEMODE) {
 455                 if (hwerrs) {
 456                         /*
 457                          * if any set that we aren't ignoring; only
 458                          * make the complaint once, in case it's stuck
 459                          * or recurring, and we get here multiple
 460                          * times.
 461                          */
 462                         if (dd->ipath_flags & IPATH_INITTED) {
 463                                 ipath_dev_err(dd, "Fatal Error (freeze "
 464                                               "mode), no longer usable\n");
 465                                 isfatal = 1;
 466                         }
 467                         *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
 468                         /* mark as having had error */
 469                         *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 470                         /*
 471                          * mark as not usable, at a minimum until driver
 472                          * is reloaded, probably until reboot, since no
 473                          * other reset is possible.
 474                          */
 475                         dd->ipath_flags &= ~IPATH_INITTED;
 476                 } else {
 477                         ipath_dbg("Clearing freezemode on ignored hardware "
 478                                   "error\n");
 479                         ctrl &= ~INFINIPATH_C_FREEZEMODE;
 480                         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
 481                                          ctrl);
 482                 }
 483         }
 484
 485         *msg = '\0';
 486
 487         /*
 488          * may someday want to decode into which bits are which
 489          * functional area for parity errors, etc.
 490          */
 491         if (hwerrs & (infinipath_hwe_htcmemparityerr_mask
 492                       << INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT)) {
 493                 bits = (u32) ((hwerrs >>
 494                                INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) &
 495                               INFINIPATH_HWE_HTCMEMPARITYERR_MASK);
 496                 snprintf(bitsmsg, sizeof bitsmsg, "[HTC Parity Errs %x] ",
 497                          bits);
 498                 strlcat(msg, bitsmsg, msgl);
 499         }
 500         if (hwerrs & (INFINIPATH_HWE_RXEMEMPARITYERR_MASK
 501                       << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)) {
 502                 bits = (u32) ((hwerrs >>
 503                                INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) &
 504                               INFINIPATH_HWE_RXEMEMPARITYERR_MASK);
 505                 snprintf(bitsmsg, sizeof bitsmsg, "[RXE Parity Errs %x] ",
 506                          bits);
 507                 strlcat(msg, bitsmsg, msgl);
 508         }
 509         if (hwerrs & (INFINIPATH_HWE_TXEMEMPARITYERR_MASK
 510                       << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)) {
 511                 bits = (u32) ((hwerrs >>
 512                                INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) &
 513                               INFINIPATH_HWE_TXEMEMPARITYERR_MASK);
 514                 snprintf(bitsmsg, sizeof bitsmsg, "[TXE Parity Errs %x] ",
 515                          bits);
 516                 strlcat(msg, bitsmsg, msgl);
 517         }
 518         if (hwerrs & INFINIPATH_HWE_IBCBUSTOSPCPARITYERR)
 519                 strlcat(msg, "[IB2IPATH Parity]", msgl);
 520         if (hwerrs & INFINIPATH_HWE_IBCBUSFRSPCPARITYERR)
 521                 strlcat(msg, "[IPATH2IB Parity]", msgl);
 522         if (hwerrs & INFINIPATH_HWE_HTCBUSIREQPARITYERR)
 523                 strlcat(msg, "[HTC Ireq Parity]", msgl);
 524         if (hwerrs & INFINIPATH_HWE_HTCBUSTREQPARITYERR)
 525                 strlcat(msg, "[HTC Treq Parity]", msgl);
 526         if (hwerrs & INFINIPATH_HWE_HTCBUSTRESPPARITYERR)
 527                 strlcat(msg, "[HTC Tresp Parity]", msgl);
 528
 529         if (hwerrs & (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS))
 530                 hwerr_crcbits(dd, hwerrs, msg, msgl);
 531
 532         if (hwerrs & INFINIPATH_HWE_HTCMISCERR5)
 533                 strlcat(msg, "[HT core Misc5]", msgl);
 534         if (hwerrs & INFINIPATH_HWE_HTCMISCERR6)
 535                 strlcat(msg, "[HT core Misc6]", msgl);
 536         if (hwerrs & INFINIPATH_HWE_HTCMISCERR7)
 537                 strlcat(msg, "[HT core Misc7]", msgl);
 538         if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
 539                 strlcat(msg, "[Memory BIST test failed, HT-400 unusable]",
 540                         msgl);
 541                 /* ignore from now on, so disable until driver reloaded */
 542                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
 543                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 544                                  dd->ipath_hwerrmask);
 545         }
 546 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |        \
 547                          INFINIPATH_HWE_COREPLL_RFSLIP |        \
 548                          INFINIPATH_HWE_HTBPLL_FBSLIP |         \
 549                          INFINIPATH_HWE_HTBPLL_RFSLIP |         \
 550                          INFINIPATH_HWE_HTAPLL_FBSLIP |         \
 551                          INFINIPATH_HWE_HTAPLL_RFSLIP)
 552
 553         if (hwerrs & _IPATH_PLL_FAIL) {
 554                 snprintf(bitsmsg, sizeof bitsmsg,
 555                          "[PLL failed (%llx), HT-400 unusable]",
 556                          (unsigned long long) (hwerrs & _IPATH_PLL_FAIL));
 557                 strlcat(msg, bitsmsg, msgl);
 558                 /* ignore from now on, so disable until driver reloaded */
 559                 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
 560                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 561                                  dd->ipath_hwerrmask);
 562         }
 563
 564         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
 565                 /*
 566                  * If it occurs, it is left masked since the eternal
 567                  * interface is unused
 568                  */
 569                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 570                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 571                                  dd->ipath_hwerrmask);
 572         }
 573
 574         if (hwerrs & INFINIPATH_HWE_RXDSYNCMEMPARITYERR)
 575                 strlcat(msg, "[Rx Dsync]", msgl);
 576         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED)
 577                 strlcat(msg, "[SerDes PLL]", msgl);
 578
 579         ipath_dev_err(dd, "%s hardware error\n", msg);
 580         if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg)
 581                 /*
 582                  * for status file; if no trailing brace is copied,
 583                  * we'll know it was truncated.
 584                  */
 585                 snprintf(dd->ipath_freezemsg,
 586                          dd->ipath_freezelen, "{%s}", msg);
 587
 588 bail:;
 589 }
 590
 591 /**
 592  * ipath_ht_boardname - fill in the board name
 593  * @dd: the infinipath device
 594  * @name: the output buffer
 595  * @namelen: the size of the output buffer
 596  *
 597  * fill in the board name, based on the board revision register
 598  */
 599 static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
 600                               size_t namelen)
 601 {
 602         char *n = NULL;
 603         u8 boardrev = dd->ipath_boardrev;
 604         int ret;
 605
 606         switch (boardrev) {
 607         case 4:         /* Ponderosa is one of the bringup boards */
 608                 n = "Ponderosa";
 609                 break;
 610         case 5:         /* HT-460 original production board */
 611                 n = "InfiniPath_HT-460";
 612                 break;
 613         case 6:
 614                 n = "OEM_Board_3";
 615                 break;
 616         case 7:
 617                 /* HT-460 small form factor production board */
 618                 n = "InfiniPath_HT-465";
 619                 break;
 620         case 8:
 621                 n = "LS/X-1";
 622                 break;
 623         case 9:         /* Comstock bringup test board */
 624                 n = "Comstock";
 625                 break;
 626         case 10:
 627                 n = "OEM_Board_2";
 628                 break;
 629         case 11:
 630                 n = "InfiniPath_HT-470";
 631                 break;
 632         case 12:
 633                 n = "OEM_Board_4";
 634                 break;
 635         default:                /* don't know, just print the number */
 636                 ipath_dev_err(dd, "Don't yet know about board "
 637                               "with ID %u\n", boardrev);
 638                 snprintf(name, namelen, "Unknown_InfiniPath_HT-4xx_%u",
 639                          boardrev);
 640                 break;
 641         }
 642         if (n)
 643                 snprintf(name, namelen, "%s", n);
 644
 645         if (dd->ipath_majrev != 3 || dd->ipath_minrev != 2) {
 646                 /*
 647                  * This version of the driver only supports the HT-400
 648                  * Rev 3.2
 649                  */
 650                 ipath_dev_err(dd,
 651                               "Unsupported HT-400 revision %u.%u!\n",
 652                               dd->ipath_majrev, dd->ipath_minrev);
 653                 ret = 1;
 654                 goto bail;
 655         }
 656         /*
 657          * pkt/word counters are 32 bit, and therefore wrap fast enough
 658          * that we snapshot them from a timer, and maintain 64 bit shadow
 659          * copies
 660          */
 661         dd->ipath_flags |= IPATH_32BITCOUNTERS;
 662         if (dd->ipath_htspeed != 800)
 663                 ipath_dev_err(dd,
 664                               "Incorrectly configured for HT @ %uMHz\n",
 665                               dd->ipath_htspeed);
 666         if (dd->ipath_boardrev == 7 || dd->ipath_boardrev == 11 ||
 667             dd->ipath_boardrev == 6)
 668                 dd->ipath_flags |= IPATH_GPIO_INTR;
 669         else
 670                 dd->ipath_flags |= IPATH_POLL_RX_INTR;
 671         if (dd->ipath_boardrev == 8) {  /* LS/X-1 */
 672                 u64 val;
 673                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
 674                 if (val & INFINIPATH_EXTS_SERDESSEL) {
 675                         /*
 676                          * hardware disabled
 677                          *
 678                          * This means that the chip is hardware disabled,
 679                          * and will not be able to bring up the link,
 680                          * in any case.  We special case this and abort
 681                          * early, to avoid later messages.  We also set
 682                          * the DISABLED status bit
 683                          */
 684                         ipath_dbg("Unit %u is hardware-disabled\n",
 685                                   dd->ipath_unit);
 686                         *dd->ipath_statusp |= IPATH_STATUS_DISABLED;
 687                         /* this value is handled differently */
 688                         ret = 2;
 689                         goto bail;
 690                 }
 691         }
 692         ret = 0;
 693
 694 bail:
 695         return ret;
 696 }
 697
 698 static void ipath_check_htlink(struct ipath_devdata *dd)
 699 {
 700         u8 linkerr, link_off, i;
 701
 702         for (i = 0; i < 2; i++) {
 703                 link_off = dd->ipath_ht_slave_off + i * 4 + 0xd;
 704                 if (pci_read_config_byte(dd->pcidev, link_off, &linkerr))
 705                         dev_info(&dd->pcidev->dev, "Couldn't read "
 706                                  "linkerror%d of HT slave/primary block\n",
 707                                  i);
 708                 else if (linkerr & 0xf0) {
 709                         ipath_cdbg(VERBOSE, "HT linkerr%d bits 0x%x set, "
 710                                    "clearing\n", linkerr >> 4, i);
 711                         /*
 712                          * writing the linkerr bits that are set should
 713                          * clear them
 714                          */
 715                         if (pci_write_config_byte(dd->pcidev, link_off,
 716                                                   linkerr))
 717                                 ipath_dbg("Failed write to clear HT "
 718                                           "linkerror%d\n", i);
 719                         if (pci_read_config_byte(dd->pcidev, link_off,
 720                                                  &linkerr))
 721                                 dev_info(&dd->pcidev->dev,
 722                                          "Couldn't reread linkerror%d of "
 723                                          "HT slave/primary block\n", i);
 724                         else if (linkerr & 0xf0)
 725                                 dev_info(&dd->pcidev->dev,
 726                                          "HT linkerror%d bits 0x%x "
 727                                          "couldn't be cleared\n",
 728                                          i, linkerr >> 4);
 729                 }
 730         }
 731 }
 732
 733 static int ipath_setup_ht_reset(struct ipath_devdata *dd)
 734 {
 735         ipath_dbg("No reset possible for HT-400\n");
 736         return 0;
 737 }
 738
 739 #define HT_CAPABILITY_ID   0x08 /* HT capabilities not defined in kernel */
 740 #define HT_INTR_DISC_CONFIG  0x80       /* HT interrupt and discovery cap */
 741 #define HT_INTR_REG_INDEX    2  /* intconfig requires indirect accesses */
 742
 743 /*
 744  * Bits 13-15 of command==0 is slave/primary block.  Clear any HT CRC
 745  * errors.  We only bother to do this at load time, because it's OK if
 746  * it happened before we were loaded (first time after boot/reset),
 747  * but any time after that, it's fatal anyway.  Also need to not check
 748  * for for upper byte errors if we are in 8 bit mode, so figure out
 749  * our width.  For now, at least, also complain if it's 8 bit.
 750  */
 751 static void slave_or_pri_blk(struct ipath_devdata *dd, struct pci_dev *pdev,
 752                              int pos, u8 cap_type)
 753 {
 754         u8 linkwidth = 0, linkerr, link_a_b_off, link_off;
 755         u16 linkctrl = 0;
 756         int i;
 757
 758         dd->ipath_ht_slave_off = pos;
 759         /* command word, master_host bit */
 760         /* master host || slave */
 761         if ((cap_type >> 2) & 1)
 762                 link_a_b_off = 4;
 763         else
 764                 link_a_b_off = 0;
 765         ipath_cdbg(VERBOSE, "HT%u (Link %c) connected to processor\n",
 766                    link_a_b_off ? 1 : 0,
 767                    link_a_b_off ? 'B' : 'A');
 768
 769         link_a_b_off += pos;
 770
 771         /*
 772          * check both link control registers; clear both HT CRC sets if
 773          * necessary.
 774          */
 775         for (i = 0; i < 2; i++) {
 776                 link_off = pos + i * 4 + 0x4;
 777                 if (pci_read_config_word(pdev, link_off, &linkctrl))
 778                         ipath_dev_err(dd, "Couldn't read HT link control%d "
 779                                       "register\n", i);
 780                 else if (linkctrl & (0xf << 8)) {
 781                         ipath_cdbg(VERBOSE, "Clear linkctrl%d CRC Error "
 782                                    "bits %x\n", i, linkctrl & (0xf << 8));
 783                         /*
 784                          * now write them back to clear the error.
 785                          */
 786                         pci_write_config_byte(pdev, link_off,
 787                                               linkctrl & (0xf << 8));
 788                 }
 789         }
 790
 791         /*
 792          * As with HT CRC bits, same for protocol errors that might occur
 793          * during boot.
 794          */
 795         for (i = 0; i < 2; i++) {
 796                 link_off = pos + i * 4 + 0xd;
 797                 if (pci_read_config_byte(pdev, link_off, &linkerr))
 798                         dev_info(&pdev->dev, "Couldn't read linkerror%d "
 799                                  "of HT slave/primary block\n", i);
 800                 else if (linkerr & 0xf0) {
 801                         ipath_cdbg(VERBOSE, "HT linkerr%d bits 0x%x set, "
 802                                    "clearing\n", linkerr >> 4, i);
 803                         /*
 804                          * writing the linkerr bits that are set will clear
 805                          * them
 806                          */
 807                         if (pci_write_config_byte
 808                             (pdev, link_off, linkerr))
 809                                 ipath_dbg("Failed write to clear HT "
 810                                           "linkerror%d\n", i);
 811                         if (pci_read_config_byte(pdev, link_off, &linkerr))
 812                                 dev_info(&pdev->dev, "Couldn't reread "
 813                                          "linkerror%d of HT slave/primary "
 814                                          "block\n", i);
 815                         else if (linkerr & 0xf0)
 816                                 dev_info(&pdev->dev, "HT linkerror%d bits "
 817                                          "0x%x couldn't be cleared\n",
 818                                          i, linkerr >> 4);
 819                 }
 820         }
 821
 822         /*
 823          * this is just for our link to the host, not devices connected
 824          * through tunnel.
 825          */
 826
 827         if (pci_read_config_byte(pdev, link_a_b_off + 7, &linkwidth))
 828                 ipath_dev_err(dd, "Couldn't read HT link width "
 829                               "config register\n");
 830         else {
 831                 u32 width;
 832                 switch (linkwidth & 7) {
 833                 case 5:
 834                         width = 4;
 835                         break;
 836                 case 4:
 837                         width = 2;
 838                         break;
 839                 case 3:
 840                         width = 32;
 841                         break;
 842                 case 1:
 843                         width = 16;
 844                         break;
 845                 case 0:
 846                 default:        /* if wrong, assume 8 bit */
 847                         width = 8;
 848                         break;
 849                 }
 850
 851                 dd->ipath_htwidth = width;
 852
 853                 if (linkwidth != 0x11) {
 854                         ipath_dev_err(dd, "Not configured for 16 bit HT "
 855                                       "(%x)\n", linkwidth);
 856                         if (!(linkwidth & 0xf)) {
 857                                 ipath_dbg("Will ignore HT lane1 errors\n");
 858                                 dd->ipath_flags |= IPATH_8BIT_IN_HT0;
 859                         }
 860                 }
 861         }
 862
 863         /*
 864          * this is just for our link to the host, not devices connected
 865          * through tunnel.
 866          */
 867         if (pci_read_config_byte(pdev, link_a_b_off + 0xd, &linkwidth))
 868                 ipath_dev_err(dd, "Couldn't read HT link frequency "
 869                               "config register\n");
 870         else {
 871                 u32 speed;
 872                 switch (linkwidth & 0xf) {
 873                 case 6:
 874                         speed = 1000;
 875                         break;
 876                 case 5:
 877                         speed = 800;
 878                         break;
 879                 case 4:
 880                         speed = 600;
 881                         break;
 882                 case 3:
 883                         speed = 500;
 884                         break;
 885                 case 2:
 886                         speed = 400;
 887                         break;
 888                 case 1:
 889                         speed = 300;
 890                         break;
 891                 default:
 892                         /*
 893                          * assume reserved and vendor-specific are 200...
 894                          */
 895                 case 0:
 896                         speed = 200;
 897                         break;
 898                 }
 899                 dd->ipath_htspeed = speed;
 900         }
 901 }
 902
 903 static int set_int_handler(struct ipath_devdata *dd, struct pci_dev *pdev,
 904                             int pos)
 905 {
 906         u32 int_handler_addr_lower;
 907         u32 int_handler_addr_upper;
 908         u64 ihandler;
 909         u32 intvec;
 910
 911         /* use indirection register to get the intr handler */
 912         pci_write_config_byte(pdev, pos + HT_INTR_REG_INDEX, 0x10);
 913         pci_read_config_dword(pdev, pos + 4, &int_handler_addr_lower);
 914         pci_write_config_byte(pdev, pos + HT_INTR_REG_INDEX, 0x11);
 915         pci_read_config_dword(pdev, pos + 4, &int_handler_addr_upper);
 916
 917         ihandler = (u64) int_handler_addr_lower |
 918                 ((u64) int_handler_addr_upper << 32);
 919
 920         /*
 921          * kernels with CONFIG_PCI_MSI set the vector in the irq field of
 922          * struct pci_device, so we use that to program the HT-400 internal
 923          * interrupt register (not config space) with that value. The BIOS
 924          * must still have done the basic MSI setup.
 925          */
 926         intvec = pdev->irq;
 927         /*
 928          * clear any vector bits there; normally not set but we'll overload
 929          * this for some debug purposes (setting the HTC debug register
 930          * value from software, rather than GPIOs), so it might be set on a
 931          * driver reload.
 932          */
 933         ihandler &= ~0xff0000;
 934         /* x86 vector goes in intrinfo[23:16] */
 935         ihandler |= intvec << 16;
 936         ipath_cdbg(VERBOSE, "ihandler lower %x, upper %x, intvec %x, "
 937                    "interruptconfig %llx\n", int_handler_addr_lower,
 938                    int_handler_addr_upper, intvec,
 939                    (unsigned long long) ihandler);
 940
 941         /* can't program yet, so save for interrupt setup */
 942         dd->ipath_intconfig = ihandler;
 943         /* keep going, so we find link control stuff also */
 944
 945         return ihandler != 0;
 946 }
 947
 948 /**
 949  * ipath_setup_ht_config - setup the interruptconfig register
 950  * @dd: the infinipath device
 951  * @pdev: the PCI device
 952  *
 953  * setup the interruptconfig register from the HT config info.
 954  * Also clear CRC errors in HT linkcontrol, if necessary.
 955  * This is done only for the real hardware.  It is done before
 956  * chip address space is initted, so can't touch infinipath registers
 957  */
 958 static int ipath_setup_ht_config(struct ipath_devdata *dd,
 959                                  struct pci_dev *pdev)
 960 {
 961         int pos, ret = 0;
 962         int ihandler = 0;
 963
 964         /*
 965          * Read the capability info to find the interrupt info, and also
 966          * handle clearing CRC errors in linkctrl register if necessary.  We
 967          * do this early, before we ever enable errors or hardware errors,
 968          * mostly to avoid causing the chip to enter freeze mode.
 969          */
 970         pos = pci_find_capability(pdev, HT_CAPABILITY_ID);
 971         if (!pos) {
 972                 ipath_dev_err(dd, "Couldn't find HyperTransport "
 973                               "capability; no interrupts\n");
 974                 ret = -ENODEV;
 975                 goto bail;
 976         }
 977         do {
 978                 u8 cap_type;
 979
 980                 /* the HT capability type byte is 3 bytes after the
 981                  * capability byte.
 982                  */
 983                 if (pci_read_config_byte(pdev, pos + 3, &cap_type)) {
 984                         dev_info(&pdev->dev, "Couldn't read config "
 985                                  "command @ %d\n", pos);
 986                         continue;
 987                 }
 988                 if (!(cap_type & 0xE0))
 989                         slave_or_pri_blk(dd, pdev, pos, cap_type);
 990                 else if (cap_type == HT_INTR_DISC_CONFIG)
 991                         ihandler = set_int_handler(dd, pdev, pos);
 992         } while ((pos = pci_find_next_capability(pdev, pos,
 993                                                  HT_CAPABILITY_ID)));
 994
 995         if (!ihandler) {
 996                 ipath_dev_err(dd, "Couldn't find interrupt handler in "
 997                               "config space\n");
 998                 ret = -ENODEV;
 999         }
1000
1001 bail:
1002         return ret;
1003 }
1004
1005 /**
1006  * ipath_setup_ht_cleanup - clean up any per-chip chip-specific stuff
1007  * @dd: the infinipath device
1008  *
1009  * Called during driver unload.
1010  * This is currently a nop for the HT-400, not for all chips
1011  */
1012 static void ipath_setup_ht_cleanup(struct ipath_devdata *dd)
1013 {
1014 }
1015
1016 /**
1017  * ipath_setup_ht_setextled - set the state of the two external LEDs
1018  * @dd: the infinipath device
1019  * @lst: the L state
1020  * @ltst: the LT state
1021  *
1022  * Set the state of the two external LEDs, to indicate physical and
1023  * logical state of IB link.   For this chip (at least with recommended
1024  * board pinouts), LED1 is Green (physical state), and LED2 is Yellow
1025  * (logical state)
1026  *
1027  * Note:  We try to match the Mellanox HCA LED behavior as best
1028  * we can.  Green indicates physical link state is OK (something is
1029  * plugged in, and we can train).
1030  * Amber indicates the link is logically up (ACTIVE).
1031  * Mellanox further blinks the amber LED to indicate data packet
1032  * activity, but we have no hardware support for that, so it would
1033  * require waking up every 10-20 msecs and checking the counters
1034  * on the chip, and then turning the LED off if appropriate.  That's
1035  * visible overhead, so not something we will do.
1036  *
1037  */
1038 static void ipath_setup_ht_setextled(struct ipath_devdata *dd,
1039                                      u64 lst, u64 ltst)
1040 {
1041         u64 extctl;
1042
1043         /* the diags use the LED to indicate diag info, so we leave
1044          * the external LED alone when the diags are running */
1045         if (ipath_diag_inuse)
1046                 return;
1047
1048         /*
1049          * start by setting both LED control bits to off, then turn
1050          * on the appropriate bit(s).
1051          */
1052         if (dd->ipath_boardrev == 8) { /* LS/X-1 uses different pins */
1053                 /*
1054                  * major difference is that INFINIPATH_EXTC_LEDGBLERR_OFF
1055                  * is inverted,  because it is normally used to indicate
1056                  * a hardware fault at reset, if there were errors
1057                  */
1058                 extctl = (dd->ipath_extctrl & ~INFINIPATH_EXTC_LEDGBLOK_ON)
1059                         | INFINIPATH_EXTC_LEDGBLERR_OFF;
1060                 if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
1061                         extctl &= ~INFINIPATH_EXTC_LEDGBLERR_OFF;
1062                 if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
1063                         extctl |= INFINIPATH_EXTC_LEDGBLOK_ON;
1064         }
1065         else {
1066                 extctl = dd->ipath_extctrl &
1067                         ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
1068                           INFINIPATH_EXTC_LED2PRIPORT_ON);
1069                 if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
1070                         extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
1071                 if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
1072                         extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
1073         }
1074         dd->ipath_extctrl = extctl;
1075         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
1076 }
1077
1078 static void ipath_init_ht_variables(void)
1079 {
1080         ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
1081         ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
1082         ipath_gpio_sda = IPATH_GPIO_SDA;
1083         ipath_gpio_scl = IPATH_GPIO_SCL;
1084
1085         infinipath_i_bitsextant =
1086                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
1087                 (INFINIPATH_I_RCVAVAIL_MASK <<
1088                  INFINIPATH_I_RCVAVAIL_SHIFT) |
1089                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
1090                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
1091
1092         infinipath_e_bitsextant =
1093                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
1094                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
1095                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
1096                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
1097                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
1098                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
1099                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
1100                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
1101                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
1102                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
1103                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
1104                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
1105                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
1106                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
1107                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
1108                 INFINIPATH_E_HARDWARE;
1109
1110         infinipath_hwe_bitsextant =
1111                 (INFINIPATH_HWE_HTCMEMPARITYERR_MASK <<
1112                  INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) |
1113                 (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1114                  INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
1115                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1116                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
1117                 INFINIPATH_HWE_HTCLNKABYTE0CRCERR |
1118                 INFINIPATH_HWE_HTCLNKABYTE1CRCERR |
1119                 INFINIPATH_HWE_HTCLNKBBYTE0CRCERR |
1120                 INFINIPATH_HWE_HTCLNKBBYTE1CRCERR |
1121                 INFINIPATH_HWE_HTCMISCERR4 |
1122                 INFINIPATH_HWE_HTCMISCERR5 | INFINIPATH_HWE_HTCMISCERR6 |
1123                 INFINIPATH_HWE_HTCMISCERR7 |
1124                 INFINIPATH_HWE_HTCBUSTREQPARITYERR |
1125                 INFINIPATH_HWE_HTCBUSTRESPPARITYERR |
1126                 INFINIPATH_HWE_HTCBUSIREQPARITYERR |
1127                 INFINIPATH_HWE_RXDSYNCMEMPARITYERR |
1128                 INFINIPATH_HWE_MEMBISTFAILED |
1129                 INFINIPATH_HWE_COREPLL_FBSLIP |
1130                 INFINIPATH_HWE_COREPLL_RFSLIP |
1131                 INFINIPATH_HWE_HTBPLL_FBSLIP |
1132                 INFINIPATH_HWE_HTBPLL_RFSLIP |
1133                 INFINIPATH_HWE_HTAPLL_FBSLIP |
1134                 INFINIPATH_HWE_HTAPLL_RFSLIP |
1135                 INFINIPATH_HWE_SERDESPLLFAILED |
1136                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
1137                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
1138
1139         infinipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
1140         infinipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
1141 }
1142
1143 /**
1144  * ipath_ht_init_hwerrors - enable hardware errors
1145  * @dd: the infinipath device
1146  *
1147  * now that we have finished initializing everything that might reasonably
1148  * cause a hardware error, and cleared those errors bits as they occur,
1149  * we can enable hardware errors in the mask (potentially enabling
1150  * freeze mode), and enable hardware errors as errors (along with
1151  * everything else) in errormask
1152  */
1153 static void ipath_ht_init_hwerrors(struct ipath_devdata *dd)
1154 {
1155         ipath_err_t val;
1156         u64 extsval;
1157
1158         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
1159
1160         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
1161                 ipath_dev_err(dd, "MemBIST did not complete!\n");
1162
1163         ipath_check_htlink(dd);
1164
1165         /* barring bugs, all hwerrors become interrupts, which can */
1166         val = -1LL;
1167         /* don't look at crc lane1 if 8 bit */
1168         if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
1169                 val &= ~infinipath_hwe_htclnkabyte1crcerr;
1170         /* don't look at crc lane1 if 8 bit */
1171         if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
1172                 val &= ~infinipath_hwe_htclnkbbyte1crcerr;
1173
1174         /*
1175          * disable RXDSYNCMEMPARITY because external serdes is unused,
1176          * and therefore the logic will never be used or initialized,
1177          * and uninitialized state will normally result in this error
1178          * being asserted.  Similarly for the external serdess pll
1179          * lock signal.
1180          */
1181         val &= ~(INFINIPATH_HWE_SERDESPLLFAILED |
1182                  INFINIPATH_HWE_RXDSYNCMEMPARITYERR);
1183
1184         /*
1185          * Disable MISCERR4 because of an inversion in the HT core
1186          * logic checking for errors that cause this bit to be set.
1187          * The errata can also cause the protocol error bit to be set
1188          * in the HT config space linkerror register(s).
1189          */
1190         val &= ~INFINIPATH_HWE_HTCMISCERR4;
1191
1192         /*
1193          * PLL ignored because MDIO interface has a logic problem
1194          * for reads, on Comstock and Ponderosa.  BRINGUP
1195          */
1196         if (dd->ipath_boardrev == 4 || dd->ipath_boardrev == 9)
1197                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
1198         dd->ipath_hwerrmask = val;
1199 }
1200
1201 /**
1202  * ipath_ht_bringup_serdes - bring up the serdes
1203  * @dd: the infinipath device
1204  */
1205 static int ipath_ht_bringup_serdes(struct ipath_devdata *dd)
1206 {
1207         u64 val, config1;
1208         int ret = 0, change = 0;
1209
1210         ipath_dbg("Trying to bringup serdes\n");
1211
1212         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
1213             INFINIPATH_HWE_SERDESPLLFAILED)
1214         {
1215                 ipath_dbg("At start, serdes PLL failed bit set in "
1216                           "hwerrstatus, clearing and continuing\n");
1217                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
1218                                  INFINIPATH_HWE_SERDESPLLFAILED);
1219         }
1220
1221         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1222         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
1223
1224         ipath_cdbg(VERBOSE, "Initial serdes status is config0=%llx "
1225                    "config1=%llx, sstatus=%llx xgxs %llx\n",
1226                    (unsigned long long) val, (unsigned long long) config1,
1227                    (unsigned long long)
1228                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
1229                    (unsigned long long)
1230                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
1231
1232         /* force reset on */
1233         val |= INFINIPATH_SERDC0_RESET_PLL
1234                 /* | INFINIPATH_SERDC0_RESET_MASK */
1235                 ;
1236         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
1237         udelay(15);             /* need pll reset set at least for a bit */
1238
1239         if (val & INFINIPATH_SERDC0_RESET_PLL) {
1240                 u64 val2 = val &= ~INFINIPATH_SERDC0_RESET_PLL;
1241                 /* set lane resets, and tx idle, during pll reset */
1242                 val2 |= INFINIPATH_SERDC0_RESET_MASK |
1243                         INFINIPATH_SERDC0_TXIDLE;
1244                 ipath_cdbg(VERBOSE, "Clearing serdes PLL reset (writing "
1245                            "%llx)\n", (unsigned long long) val2);
1246                 ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0,
1247                                  val2);
1248                 /*
1249                  * be sure chip saw it
1250                  */
1251                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
1252                 /*
1253                  * need pll reset clear at least 11 usec before lane
1254                  * resets cleared; give it a few more
1255                  */
1256                 udelay(15);
1257                 val = val2;     /* for check below */
1258         }
1259
1260         if (val & (INFINIPATH_SERDC0_RESET_PLL |
1261                    INFINIPATH_SERDC0_RESET_MASK |
1262                    INFINIPATH_SERDC0_TXIDLE)) {
1263                 val &= ~(INFINIPATH_SERDC0_RESET_PLL |
1264                          INFINIPATH_SERDC0_RESET_MASK |
1265                          INFINIPATH_SERDC0_TXIDLE);
1266                 /* clear them */
1267                 ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0,
1268                                  val);
1269         }
1270
1271         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1272         if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
1273              INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
1274                 val &= ~(INFINIPATH_XGXS_MDIOADDR_MASK <<
1275                          INFINIPATH_XGXS_MDIOADDR_SHIFT);
1276                 /*
1277                  * we use address 3
1278                  */
1279                 val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
1280                 change = 1;
1281         }
1282         if (val & INFINIPATH_XGXS_RESET) {
1283                 /* normally true after boot */
1284                 val &= ~INFINIPATH_XGXS_RESET;
1285                 change = 1;
1286         }
1287         if (change)
1288                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1289
1290         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1291
1292         /* clear current and de-emphasis bits */
1293         config1 &= ~0x0ffffffff00ULL;
1294         /* set current to 20ma */
1295         config1 |= 0x00000000000ULL;
1296         /* set de-emphasis to -5.68dB */
1297         config1 |= 0x0cccc000000ULL;
1298         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
1299
1300         ipath_cdbg(VERBOSE, "After setup: serdes status is config0=%llx "
1301                    "config1=%llx, sstatus=%llx xgxs %llx\n",
1302                    (unsigned long long) val, (unsigned long long) config1,
1303                    (unsigned long long)
1304                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
1305                    (unsigned long long)
1306                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
1307
1308         if (!ipath_waitfor_mdio_cmdready(dd)) {
1309                 ipath_write_kreg(dd, dd->ipath_kregs->kr_mdio,
1310                                  ipath_mdio_req(IPATH_MDIO_CMD_READ, 31,
1311                                                 IPATH_MDIO_CTRL_XGXS_REG_8,
1312                                                 0));
1313                 if (ipath_waitfor_complete(dd, dd->ipath_kregs->kr_mdio,
1314                                            IPATH_MDIO_DATAVALID, &val))
1315                         ipath_dbg("Never got MDIO data for XGXS status "
1316                                   "read\n");
1317                 else
1318                         ipath_cdbg(VERBOSE, "MDIO Read reg8, "
1319                                    "'bank' 31 %x\n", (u32) val);
1320         } else
1321                 ipath_dbg("Never got MDIO cmdready for XGXS status read\n");
1322
1323         return ret;             /* for now, say we always succeeded */
1324 }
1325
1326 /**
1327  * ipath_ht_quiet_serdes - set serdes to txidle
1328  * @dd: the infinipath device
1329  * driver is being unloaded
1330  */
1331 static void ipath_ht_quiet_serdes(struct ipath_devdata *dd)
1332 {
1333         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1334
1335         val |= INFINIPATH_SERDC0_TXIDLE;
1336         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
1337                   (unsigned long long) val);
1338         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
1339 }
1340
1341 static int ipath_ht_intconfig(struct ipath_devdata *dd)
1342 {
1343         int ret;
1344
1345         if (!dd->ipath_intconfig) {
1346                 ipath_dev_err(dd, "No interrupts enabled, couldn't setup "
1347                               "interrupt address\n");
1348                 ret = 1;
1349                 goto bail;
1350         }
1351
1352         ipath_write_kreg(dd, dd->ipath_kregs->kr_interruptconfig,
1353                          dd->ipath_intconfig);  /* interrupt address */
1354         ret = 0;
1355
1356 bail:
1357         return ret;
1358 }
1359
1360 /**
1361  * ipath_pe_put_tid - write a TID in chip
1362  * @dd: the infinipath device
1363  * @tidptr: pointer to the expected TID (in chip) to udpate
1364  * @tidtype: 0 for eager, 1 for expected
1365  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1366  *
1367  * This exists as a separate routine to allow for special locking etc.
1368  * It's used for both the full cleanup on exit, as well as the normal
1369  * setup and teardown.
1370  */
1371 static void ipath_ht_put_tid(struct ipath_devdata *dd,
1372                              u64 __iomem *tidptr, u32 type,
1373                              unsigned long pa)
1374 {
1375         if (pa != dd->ipath_tidinvalid) {
1376                 if (unlikely((pa & ~INFINIPATH_RT_ADDR_MASK))) {
1377                         dev_info(&dd->pcidev->dev,
1378                                  "physaddr %lx has more than "
1379                                  "40 bits, using only 40!!!\n", pa);
1380                         pa &= INFINIPATH_RT_ADDR_MASK;
1381                 }
1382                 if (type == 0)
1383                         pa |= dd->ipath_tidtemplate;
1384                 else {
1385                         /* in words (fixed, full page).  */
1386                         u64 lenvalid = PAGE_SIZE >> 2;
1387                         lenvalid <<= INFINIPATH_RT_BUFSIZE_SHIFT;
1388                         pa |= lenvalid | INFINIPATH_RT_VALID;
1389                 }
1390         }
1391         if (dd->ipath_kregbase)
1392                 writeq(pa, tidptr);
1393 }
1394
1395 /**
1396  * ipath_ht_clear_tid - clear all TID entries for a port, expected and eager
1397  * @dd: the infinipath device
1398  * @port: the port
1399  *
1400  * Used from ipath_close(), and at chip initialization.
1401  */
1402 static void ipath_ht_clear_tids(struct ipath_devdata *dd, unsigned port)
1403 {
1404         u64 __iomem *tidbase;
1405         int i;
1406
1407         if (!dd->ipath_kregbase)
1408                 return;
1409
1410         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1411
1412         /*
1413          * need to invalidate all of the expected TID entries for this
1414          * port, so we don't have valid entries that might somehow get
1415          * used (early in next use of this port, or through some bug)
1416          */
1417         tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
1418                                    dd->ipath_rcvtidbase +
1419                                    port * dd->ipath_rcvtidcnt *
1420                                    sizeof(*tidbase));
1421         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1422                 ipath_ht_put_tid(dd, &tidbase[i], 1, dd->ipath_tidinvalid);
1423
1424         tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
1425                                    dd->ipath_rcvegrbase +
1426                                    port * dd->ipath_rcvegrcnt *
1427                                    sizeof(*tidbase));
1428
1429         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1430                 ipath_ht_put_tid(dd, &tidbase[i], 0, dd->ipath_tidinvalid);
1431 }
1432
1433 /**
1434  * ipath_ht_tidtemplate - setup constants for TID updates
1435  * @dd: the infinipath device
1436  *
1437  * We setup stuff that we use a lot, to avoid calculating each time
1438  */
1439 static void ipath_ht_tidtemplate(struct ipath_devdata *dd)
1440 {
1441         dd->ipath_tidtemplate = dd->ipath_ibmaxlen >> 2;
1442         dd->ipath_tidtemplate <<= INFINIPATH_RT_BUFSIZE_SHIFT;
1443         dd->ipath_tidtemplate |= INFINIPATH_RT_VALID;
1444
1445         /*
1446          * work around chip errata bug 7358, by marking invalid tids
1447          * as having max length
1448          */
1449         dd->ipath_tidinvalid = (-1LL & INFINIPATH_RT_BUFSIZE_MASK) <<
1450                 INFINIPATH_RT_BUFSIZE_SHIFT;
1451 }
1452
1453 static int ipath_ht_early_init(struct ipath_devdata *dd)
1454 {
1455         u32 __iomem *piobuf;
1456         u32 pioincr, val32, egrsize;
1457         int i;
1458
1459         /*
1460          * one cache line; long IB headers will spill over into received
1461          * buffer
1462          */
1463         dd->ipath_rcvhdrentsize = 16;
1464         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1465
1466         /*
1467          * For HT-400, we allocate a somewhat overly large eager buffer,
1468          * such that we can guarantee that we can receive the largest
1469          * packet that we can send out.  To truly support a 4KB MTU,
1470          * we need to bump this to a large value.  To date, other than
1471          * testing, we have never encountered an HCA that can really
1472          * send 4KB MTU packets, so we do not handle that (we'll get
1473          * errors interrupts if we ever see one).
1474          */
1475         dd->ipath_rcvegrbufsize = dd->ipath_piosize2k;
1476         egrsize = dd->ipath_rcvegrbufsize;
1477
1478         /*
1479          * the min() check here is currently a nop, but it may not
1480          * always be, depending on just how we do ipath_rcvegrbufsize
1481          */
1482         dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
1483                                  dd->ipath_rcvegrbufsize);
1484         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1485         ipath_ht_tidtemplate(dd);
1486
1487         /*
1488          * zero all the TID entries at startup.  We do this for sanity,
1489          * in case of a previous driver crash of some kind, and also
1490          * because the chip powers up with these memories in an unknown
1491          * state.  Use portcnt, not cfgports, since this is for the
1492          * full chip, not for current (possibly different) configuration
1493          * value.
1494          * Chip Errata bug 6447
1495          */
1496         for (val32 = 0; val32 < dd->ipath_portcnt; val32++)
1497                 ipath_ht_clear_tids(dd, val32);
1498
1499         /*
1500          * write the pbc of each buffer, to be sure it's initialized, then
1501          * cancel all the buffers, and also abort any packets that might
1502          * have been in flight for some reason (the latter is for driver
1503          * unload/reload, but isn't a bad idea at first init).  PIO send
1504          * isn't enabled at this point, so there is no danger of sending
1505          * these out on the wire.
1506          * Chip Errata bug 6610
1507          */
1508         piobuf = (u32 __iomem *) (((char __iomem *)(dd->ipath_kregbase)) +
1509                                   dd->ipath_piobufbase);
1510         pioincr = dd->ipath_palign / sizeof(*piobuf);
1511         for (i = 0; i < dd->ipath_piobcnt2k; i++) {
1512                 /*
1513                  * reasonable word count, just to init pbc
1514                  */
1515                 writel(16, piobuf);
1516                 piobuf += pioincr;
1517         }
1518         /*
1519          * self-clearing
1520          */
1521         ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
1522                          INFINIPATH_S_ABORT);
1523         return 0;
1524 }
1525
1526 /**
1527  * ipath_init_ht_get_base_info - set chip-specific flags for user code
1528  * @dd: the infinipath device
1529  * @kbase: ipath_base_info pointer
1530  *
1531  * We set the PCIE flag because the lower bandwidth on PCIe vs
1532  * HyperTransport can affect some user packet algorithims.
1533  */
1534 static int ipath_ht_get_base_info(struct ipath_portdata *pd, void *kbase)
1535 {
1536         struct ipath_base_info *kinfo = kbase;
1537
1538         kinfo->spi_runtime_flags |= IPATH_RUNTIME_HT |
1539                 IPATH_RUNTIME_RCVHDR_COPY;
1540
1541         return 0;
1542 }
1543
1544 /**
1545  * ipath_init_ht400_funcs - set up the chip-specific function pointers
1546  * @dd: the infinipath device
1547  *
1548  * This is global, and is called directly at init to set up the
1549  * chip-specific function pointers for later use.
1550  */
1551 void ipath_init_ht400_funcs(struct ipath_devdata *dd)
1552 {
1553         dd->ipath_f_intrsetup = ipath_ht_intconfig;
1554         dd->ipath_f_bus = ipath_setup_ht_config;
1555         dd->ipath_f_reset = ipath_setup_ht_reset;
1556         dd->ipath_f_get_boardname = ipath_ht_boardname;
1557         dd->ipath_f_init_hwerrors = ipath_ht_init_hwerrors;
1558         dd->ipath_f_init_hwerrors = ipath_ht_init_hwerrors;
1559         dd->ipath_f_early_init = ipath_ht_early_init;
1560         dd->ipath_f_handle_hwerrors = ipath_ht_handle_hwerrors;
1561         dd->ipath_f_quiet_serdes = ipath_ht_quiet_serdes;
1562         dd->ipath_f_bringup_serdes = ipath_ht_bringup_serdes;
1563         dd->ipath_f_clear_tids = ipath_ht_clear_tids;
1564         dd->ipath_f_put_tid = ipath_ht_put_tid;
1565         dd->ipath_f_cleanup = ipath_setup_ht_cleanup;
1566         dd->ipath_f_setextled = ipath_setup_ht_setextled;
1567         dd->ipath_f_get_base_info = ipath_ht_get_base_info;
1568
1569         /*
1570          * initialize chip-specific variables
1571          */
1572         dd->ipath_f_tidtemplate = ipath_ht_tidtemplate;
1573
1574         /*
1575          * setup the register offsets, since they are different for each
1576          * chip
1577          */
1578         dd->ipath_kregs = &ipath_ht_kregs;
1579         dd->ipath_cregs = &ipath_ht_cregs;
1580
1581         /*
1582          * do very early init that is needed before ipath_f_bus is
1583          * called
1584          */
1585         ipath_init_ht_variables();
1586 }