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   1 /*
   2  * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
   3  * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 /*
  35  * This file contains all of the code that is specific to the InfiniPath
  36  * HT chip.
  37  */
  38
  39 #include <linux/vmalloc.h>
  40 #include <linux/pci.h>
  41 #include <linux/delay.h>
  42 #include <linux/htirq.h>
  43
  44 #include "ipath_kernel.h"
  45 #include "ipath_registers.h"
  46
  47 static void ipath_setup_ht_setextled(struct ipath_devdata *, u64, u64);
  48
  49
  50 /*
  51  * This lists the InfiniPath registers, in the actual chip layout.
  52  * This structure should never be directly accessed.
  53  *
  54  * The names are in InterCap form because they're taken straight from
  55  * the chip specification.  Since they're only used in this file, they
  56  * don't pollute the rest of the source.
  57 */
  58
  59 struct _infinipath_do_not_use_kernel_regs {
  60         unsigned long long Revision;
  61         unsigned long long Control;
  62         unsigned long long PageAlign;
  63         unsigned long long PortCnt;
  64         unsigned long long DebugPortSelect;
  65         unsigned long long DebugPort;
  66         unsigned long long SendRegBase;
  67         unsigned long long UserRegBase;
  68         unsigned long long CounterRegBase;
  69         unsigned long long Scratch;
  70         unsigned long long ReservedMisc1;
  71         unsigned long long InterruptConfig;
  72         unsigned long long IntBlocked;
  73         unsigned long long IntMask;
  74         unsigned long long IntStatus;
  75         unsigned long long IntClear;
  76         unsigned long long ErrorMask;
  77         unsigned long long ErrorStatus;
  78         unsigned long long ErrorClear;
  79         unsigned long long HwErrMask;
  80         unsigned long long HwErrStatus;
  81         unsigned long long HwErrClear;
  82         unsigned long long HwDiagCtrl;
  83         unsigned long long MDIO;
  84         unsigned long long IBCStatus;
  85         unsigned long long IBCCtrl;
  86         unsigned long long ExtStatus;
  87         unsigned long long ExtCtrl;
  88         unsigned long long GPIOOut;
  89         unsigned long long GPIOMask;
  90         unsigned long long GPIOStatus;
  91         unsigned long long GPIOClear;
  92         unsigned long long RcvCtrl;
  93         unsigned long long RcvBTHQP;
  94         unsigned long long RcvHdrSize;
  95         unsigned long long RcvHdrCnt;
  96         unsigned long long RcvHdrEntSize;
  97         unsigned long long RcvTIDBase;
  98         unsigned long long RcvTIDCnt;
  99         unsigned long long RcvEgrBase;
 100         unsigned long long RcvEgrCnt;
 101         unsigned long long RcvBufBase;
 102         unsigned long long RcvBufSize;
 103         unsigned long long RxIntMemBase;
 104         unsigned long long RxIntMemSize;
 105         unsigned long long RcvPartitionKey;
 106         unsigned long long ReservedRcv[10];
 107         unsigned long long SendCtrl;
 108         unsigned long long SendPIOBufBase;
 109         unsigned long long SendPIOSize;
 110         unsigned long long SendPIOBufCnt;
 111         unsigned long long SendPIOAvailAddr;
 112         unsigned long long TxIntMemBase;
 113         unsigned long long TxIntMemSize;
 114         unsigned long long ReservedSend[9];
 115         unsigned long long SendBufferError;
 116         unsigned long long SendBufferErrorCONT1;
 117         unsigned long long SendBufferErrorCONT2;
 118         unsigned long long SendBufferErrorCONT3;
 119         unsigned long long ReservedSBE[4];
 120         unsigned long long RcvHdrAddr0;
 121         unsigned long long RcvHdrAddr1;
 122         unsigned long long RcvHdrAddr2;
 123         unsigned long long RcvHdrAddr3;
 124         unsigned long long RcvHdrAddr4;
 125         unsigned long long RcvHdrAddr5;
 126         unsigned long long RcvHdrAddr6;
 127         unsigned long long RcvHdrAddr7;
 128         unsigned long long RcvHdrAddr8;
 129         unsigned long long ReservedRHA[7];
 130         unsigned long long RcvHdrTailAddr0;
 131         unsigned long long RcvHdrTailAddr1;
 132         unsigned long long RcvHdrTailAddr2;
 133         unsigned long long RcvHdrTailAddr3;
 134         unsigned long long RcvHdrTailAddr4;
 135         unsigned long long RcvHdrTailAddr5;
 136         unsigned long long RcvHdrTailAddr6;
 137         unsigned long long RcvHdrTailAddr7;
 138         unsigned long long RcvHdrTailAddr8;
 139         unsigned long long ReservedRHTA[7];
 140         unsigned long long Sync;        /* Software only */
 141         unsigned long long Dump;        /* Software only */
 142         unsigned long long SimVer;      /* Software only */
 143         unsigned long long ReservedSW[5];
 144         unsigned long long SerdesConfig0;
 145         unsigned long long SerdesConfig1;
 146         unsigned long long SerdesStatus;
 147         unsigned long long XGXSConfig;
 148         unsigned long long ReservedSW2[4];
 149 };
 150
 151 struct _infinipath_do_not_use_counters {
 152         __u64 LBIntCnt;
 153         __u64 LBFlowStallCnt;
 154         __u64 Reserved1;
 155         __u64 TxUnsupVLErrCnt;
 156         __u64 TxDataPktCnt;
 157         __u64 TxFlowPktCnt;
 158         __u64 TxDwordCnt;
 159         __u64 TxLenErrCnt;
 160         __u64 TxMaxMinLenErrCnt;
 161         __u64 TxUnderrunCnt;
 162         __u64 TxFlowStallCnt;
 163         __u64 TxDroppedPktCnt;
 164         __u64 RxDroppedPktCnt;
 165         __u64 RxDataPktCnt;
 166         __u64 RxFlowPktCnt;
 167         __u64 RxDwordCnt;
 168         __u64 RxLenErrCnt;
 169         __u64 RxMaxMinLenErrCnt;
 170         __u64 RxICRCErrCnt;
 171         __u64 RxVCRCErrCnt;
 172         __u64 RxFlowCtrlErrCnt;
 173         __u64 RxBadFormatCnt;
 174         __u64 RxLinkProblemCnt;
 175         __u64 RxEBPCnt;
 176         __u64 RxLPCRCErrCnt;
 177         __u64 RxBufOvflCnt;
 178         __u64 RxTIDFullErrCnt;
 179         __u64 RxTIDValidErrCnt;
 180         __u64 RxPKeyMismatchCnt;
 181         __u64 RxP0HdrEgrOvflCnt;
 182         __u64 RxP1HdrEgrOvflCnt;
 183         __u64 RxP2HdrEgrOvflCnt;
 184         __u64 RxP3HdrEgrOvflCnt;
 185         __u64 RxP4HdrEgrOvflCnt;
 186         __u64 RxP5HdrEgrOvflCnt;
 187         __u64 RxP6HdrEgrOvflCnt;
 188         __u64 RxP7HdrEgrOvflCnt;
 189         __u64 RxP8HdrEgrOvflCnt;
 190         __u64 Reserved6;
 191         __u64 Reserved7;
 192         __u64 IBStatusChangeCnt;
 193         __u64 IBLinkErrRecoveryCnt;
 194         __u64 IBLinkDownedCnt;
 195         __u64 IBSymbolErrCnt;
 196 };
 197
 198 #define IPATH_KREG_OFFSET(field) (offsetof( \
 199         struct _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
 200 #define IPATH_CREG_OFFSET(field) (offsetof( \
 201         struct _infinipath_do_not_use_counters, field) / sizeof(u64))
 202
 203 static const struct ipath_kregs ipath_ht_kregs = {
 204         .kr_control = IPATH_KREG_OFFSET(Control),
 205         .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
 206         .kr_debugport = IPATH_KREG_OFFSET(DebugPort),
 207         .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
 208         .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
 209         .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
 210         .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
 211         .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
 212         .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
 213         .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
 214         .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
 215         .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
 216         .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
 217         .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
 218         .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
 219         .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
 220         .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
 221         .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
 222         .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
 223         .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
 224         .kr_intclear = IPATH_KREG_OFFSET(IntClear),
 225         .kr_interruptconfig = IPATH_KREG_OFFSET(InterruptConfig),
 226         .kr_intmask = IPATH_KREG_OFFSET(IntMask),
 227         .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
 228         .kr_mdio = IPATH_KREG_OFFSET(MDIO),
 229         .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
 230         .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
 231         .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
 232         .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
 233         .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
 234         .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
 235         .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
 236         .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
 237         .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
 238         .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
 239         .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
 240         .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
 241         .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
 242         .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
 243         .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
 244         .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
 245         .kr_revision = IPATH_KREG_OFFSET(Revision),
 246         .kr_scratch = IPATH_KREG_OFFSET(Scratch),
 247         .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
 248         .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
 249         .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
 250         .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
 251         .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
 252         .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
 253         .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
 254         .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
 255         .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
 256         .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
 257         .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
 258         .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
 259         .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
 260         .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
 261         /*
 262          * These should not be used directly via ipath_write_kreg64(),
 263          * use them with ipath_write_kreg64_port(),
 264          */
 265         .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
 266         .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0)
 267 };
 268
 269 static const struct ipath_cregs ipath_ht_cregs = {
 270         .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
 271         .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
 272         .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
 273         .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
 274         .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
 275         .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
 276         .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
 277         .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
 278         .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
 279         .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
 280         .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
 281         .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
 282         /* calc from Reg_CounterRegBase + offset */
 283         .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
 284         .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
 285         .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
 286         .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
 287         .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
 288         .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
 289         .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
 290         .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
 291         .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
 292         .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
 293         .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
 294         .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
 295         .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
 296         .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
 297         .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
 298         .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
 299         .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
 300         .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
 301         .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
 302         .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
 303         .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
 304 };
 305
 306 /* kr_intstatus, kr_intclear, kr_intmask bits */
 307 #define INFINIPATH_I_RCVURG_MASK ((1U<<9)-1)
 308 #define INFINIPATH_I_RCVAVAIL_MASK ((1U<<9)-1)
 309
 310 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 311 #define INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT 0
 312 #define INFINIPATH_HWE_HTCMEMPARITYERR_MASK 0x3FFFFFULL
 313 #define INFINIPATH_HWE_HTCLNKABYTE0CRCERR   0x0000000000800000ULL
 314 #define INFINIPATH_HWE_HTCLNKABYTE1CRCERR   0x0000000001000000ULL
 315 #define INFINIPATH_HWE_HTCLNKBBYTE0CRCERR   0x0000000002000000ULL
 316 #define INFINIPATH_HWE_HTCLNKBBYTE1CRCERR   0x0000000004000000ULL
 317 #define INFINIPATH_HWE_HTCMISCERR4          0x0000000008000000ULL
 318 #define INFINIPATH_HWE_HTCMISCERR5          0x0000000010000000ULL
 319 #define INFINIPATH_HWE_HTCMISCERR6          0x0000000020000000ULL
 320 #define INFINIPATH_HWE_HTCMISCERR7          0x0000000040000000ULL
 321 #define INFINIPATH_HWE_HTCBUSTREQPARITYERR  0x0000000080000000ULL
 322 #define INFINIPATH_HWE_HTCBUSTRESPPARITYERR 0x0000000100000000ULL
 323 #define INFINIPATH_HWE_HTCBUSIREQPARITYERR  0x0000000200000000ULL
 324 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 325 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 326 #define INFINIPATH_HWE_HTBPLL_FBSLIP        0x0200000000000000ULL
 327 #define INFINIPATH_HWE_HTBPLL_RFSLIP        0x0400000000000000ULL
 328 #define INFINIPATH_HWE_HTAPLL_FBSLIP        0x0800000000000000ULL
 329 #define INFINIPATH_HWE_HTAPLL_RFSLIP        0x1000000000000000ULL
 330 #define INFINIPATH_HWE_SERDESPLLFAILED      0x2000000000000000ULL
 331
 332 /* kr_extstatus bits */
 333 #define INFINIPATH_EXTS_FREQSEL 0x2
 334 #define INFINIPATH_EXTS_SERDESSEL 0x4
 335 #define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 336 #define INFINIPATH_EXTS_MEMBIST_CORRECT     0x0000000000008000
 337
 338
 339 /* TID entries (memory), HT-only */
 340 #define INFINIPATH_RT_ADDR_MASK 0xFFFFFFFFFFULL /* 40 bits valid */
 341 #define INFINIPATH_RT_VALID 0x8000000000000000ULL
 342 #define INFINIPATH_RT_ADDR_SHIFT 0
 343 #define INFINIPATH_RT_BUFSIZE_MASK 0x3FFFULL
 344 #define INFINIPATH_RT_BUFSIZE_SHIFT 48
 345
 346 #define INFINIPATH_R_INTRAVAIL_SHIFT 16
 347 #define INFINIPATH_R_TAILUPD_SHIFT 31
 348
 349 /* kr_xgxsconfig bits */
 350 #define INFINIPATH_XGXS_RESET          0x7ULL
 351
 352 /*
 353  * masks and bits that are different in different chips, or present only
 354  * in one
 355  */
 356 static const ipath_err_t infinipath_hwe_htcmemparityerr_mask =
 357     INFINIPATH_HWE_HTCMEMPARITYERR_MASK;
 358 static const ipath_err_t infinipath_hwe_htcmemparityerr_shift =
 359     INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT;
 360
 361 static const ipath_err_t infinipath_hwe_htclnkabyte0crcerr =
 362     INFINIPATH_HWE_HTCLNKABYTE0CRCERR;
 363 static const ipath_err_t infinipath_hwe_htclnkabyte1crcerr =
 364     INFINIPATH_HWE_HTCLNKABYTE1CRCERR;
 365 static const ipath_err_t infinipath_hwe_htclnkbbyte0crcerr =
 366     INFINIPATH_HWE_HTCLNKBBYTE0CRCERR;
 367 static const ipath_err_t infinipath_hwe_htclnkbbyte1crcerr =
 368     INFINIPATH_HWE_HTCLNKBBYTE1CRCERR;
 369
 370 #define _IPATH_GPIO_SDA_NUM 1
 371 #define _IPATH_GPIO_SCL_NUM 0
 372
 373 #define IPATH_GPIO_SDA \
 374         (1ULL << (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 375 #define IPATH_GPIO_SCL \
 376         (1ULL << (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 377
 378 /* keep the code below somewhat more readonable; not used elsewhere */
 379 #define _IPATH_HTLINK0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr |     \
 380                                 infinipath_hwe_htclnkabyte1crcerr)
 381 #define _IPATH_HTLINK1_CRCBITS (infinipath_hwe_htclnkbbyte0crcerr |     \
 382                                 infinipath_hwe_htclnkbbyte1crcerr)
 383 #define _IPATH_HTLANE0_CRCBITS (infinipath_hwe_htclnkabyte0crcerr |     \
 384                                 infinipath_hwe_htclnkbbyte0crcerr)
 385 #define _IPATH_HTLANE1_CRCBITS (infinipath_hwe_htclnkabyte1crcerr |     \
 386                                 infinipath_hwe_htclnkbbyte1crcerr)
 387
 388 static void hwerr_crcbits(struct ipath_devdata *dd, ipath_err_t hwerrs,
 389                           char *msg, size_t msgl)
 390 {
 391         char bitsmsg[64];
 392         ipath_err_t crcbits = hwerrs &
 393                 (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS);
 394         /* don't check if 8bit HT */
 395         if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
 396                 crcbits &= ~infinipath_hwe_htclnkabyte1crcerr;
 397         /* don't check if 8bit HT */
 398         if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
 399                 crcbits &= ~infinipath_hwe_htclnkbbyte1crcerr;
 400         /*
 401          * we'll want to ignore link errors on link that is
 402          * not in use, if any.  For now, complain about both
 403          */
 404         if (crcbits) {
 405                 u16 ctrl0, ctrl1;
 406                 snprintf(bitsmsg, sizeof bitsmsg,
 407                          "[HT%s lane %s CRC (%llx); powercycle to completely clear]",
 408                          !(crcbits & _IPATH_HTLINK1_CRCBITS) ?
 409                          "0 (A)" : (!(crcbits & _IPATH_HTLINK0_CRCBITS)
 410                                     ? "1 (B)" : "0+1 (A+B)"),
 411                          !(crcbits & _IPATH_HTLANE1_CRCBITS) ? "0"
 412                          : (!(crcbits & _IPATH_HTLANE0_CRCBITS) ? "1" :
 413                             "0+1"), (unsigned long long) crcbits);
 414                 strlcat(msg, bitsmsg, msgl);
 415
 416                 /*
 417                  * print extra info for debugging.  slave/primary
 418                  * config word 4, 8 (link control 0, 1)
 419                  */
 420
 421                 if (pci_read_config_word(dd->pcidev,
 422                                          dd->ipath_ht_slave_off + 0x4,
 423                                          &ctrl0))
 424                         dev_info(&dd->pcidev->dev, "Couldn't read "
 425                                  "linkctrl0 of slave/primary "
 426                                  "config block\n");
 427                 else if (!(ctrl0 & 1 << 6))
 428                         /* not if EOC bit set */
 429                         ipath_dbg("HT linkctrl0 0x%x%s%s\n", ctrl0,
 430                                   ((ctrl0 >> 8) & 7) ? " CRC" : "",
 431                                   ((ctrl0 >> 4) & 1) ? "linkfail" :
 432                                   "");
 433                 if (pci_read_config_word(dd->pcidev,
 434                                          dd->ipath_ht_slave_off + 0x8,
 435                                          &ctrl1))
 436                         dev_info(&dd->pcidev->dev, "Couldn't read "
 437                                  "linkctrl1 of slave/primary "
 438                                  "config block\n");
 439                 else if (!(ctrl1 & 1 << 6))
 440                         /* not if EOC bit set */
 441                         ipath_dbg("HT linkctrl1 0x%x%s%s\n", ctrl1,
 442                                   ((ctrl1 >> 8) & 7) ? " CRC" : "",
 443                                   ((ctrl1 >> 4) & 1) ? "linkfail" :
 444                                   "");
 445
 446                 /* disable until driver reloaded */
 447                 dd->ipath_hwerrmask &= ~crcbits;
 448                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 449                                  dd->ipath_hwerrmask);
 450                 ipath_dbg("HT crc errs: %s\n", msg);
 451         } else
 452                 ipath_dbg("ignoring HT crc errors 0x%llx, "
 453                           "not in use\n", (unsigned long long)
 454                           (hwerrs & (_IPATH_HTLINK0_CRCBITS |
 455                                      _IPATH_HTLINK1_CRCBITS)));
 456 }
 457
 458 /* 6110 specific hardware errors... */
 459 static const struct ipath_hwerror_msgs ipath_6110_hwerror_msgs[] = {
 460         INFINIPATH_HWE_MSG(HTCBUSIREQPARITYERR, "HTC Ireq Parity"),
 461         INFINIPATH_HWE_MSG(HTCBUSTREQPARITYERR, "HTC Treq Parity"),
 462         INFINIPATH_HWE_MSG(HTCBUSTRESPPARITYERR, "HTC Tresp Parity"),
 463         INFINIPATH_HWE_MSG(HTCMISCERR5, "HT core Misc5"),
 464         INFINIPATH_HWE_MSG(HTCMISCERR6, "HT core Misc6"),
 465         INFINIPATH_HWE_MSG(HTCMISCERR7, "HT core Misc7"),
 466         INFINIPATH_HWE_MSG(RXDSYNCMEMPARITYERR, "Rx Dsync"),
 467         INFINIPATH_HWE_MSG(SERDESPLLFAILED, "SerDes PLL"),
 468 };
 469
 470 #define TXE_PIO_PARITY ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF | \
 471                         INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC) \
 472                         << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)
 473 #define RXE_EAGER_PARITY (INFINIPATH_HWE_RXEMEMPARITYERR_EAGERTID \
 474                           << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)
 475
 476 static int ipath_ht_txe_recover(struct ipath_devdata *);
 477
 478 /**
 479  * ipath_ht_handle_hwerrors - display hardware errors.
 480  * @dd: the infinipath device
 481  * @msg: the output buffer
 482  * @msgl: the size of the output buffer
 483  *
 484  * Use same msg buffer as regular errors to avoid excessive stack
 485  * use.  Most hardware errors are catastrophic, but for right now,
 486  * we'll print them and continue.  We reuse the same message buffer as
 487  * ipath_handle_errors() to avoid excessive stack usage.
 488  */
 489 static void ipath_ht_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 490                                      size_t msgl)
 491 {
 492         ipath_err_t hwerrs;
 493         u32 bits, ctrl;
 494         int isfatal = 0;
 495         char bitsmsg[64];
 496         int log_idx;
 497
 498         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 499
 500         if (!hwerrs) {
 501                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 502                 /*
 503                  * better than printing cofusing messages
 504                  * This seems to be related to clearing the crc error, or
 505                  * the pll error during init.
 506                  */
 507                 goto bail;
 508         } else if (hwerrs == -1LL) {
 509                 ipath_dev_err(dd, "Read of hardware error status failed "
 510                               "(all bits set); ignoring\n");
 511                 goto bail;
 512         }
 513         ipath_stats.sps_hwerrs++;
 514
 515         /* Always clear the error status register, except MEMBISTFAIL,
 516          * regardless of whether we continue or stop using the chip.
 517          * We want that set so we know it failed, even across driver reload.
 518          * We'll still ignore it in the hwerrmask.  We do this partly for
 519          * diagnostics, but also for support */
 520         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 521                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 522
 523         hwerrs &= dd->ipath_hwerrmask;
 524
 525         /* We log some errors to EEPROM, check if we have any of those. */
 526         for (log_idx = 0; log_idx < IPATH_EEP_LOG_CNT; ++log_idx)
 527                 if (hwerrs & dd->ipath_eep_st_masks[log_idx].hwerrs_to_log)
 528                         ipath_inc_eeprom_err(dd, log_idx, 1);
 529
 530         /*
 531          * make sure we get this much out, unless told to be quiet,
 532          * it's a parity error we may recover from,
 533          * or it's occurred within the last 5 seconds
 534          */
 535         if ((hwerrs & ~(dd->ipath_lasthwerror | TXE_PIO_PARITY |
 536                 RXE_EAGER_PARITY)) ||
 537                 (ipath_debug & __IPATH_VERBDBG))
 538                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 539                          "(cleared)\n", (unsigned long long) hwerrs);
 540         dd->ipath_lasthwerror |= hwerrs;
 541
 542         if (hwerrs & ~dd->ipath_hwe_bitsextant)
 543                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 544                               "%llx set\n", (unsigned long long)
 545                               (hwerrs & ~dd->ipath_hwe_bitsextant));
 546
 547         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 548         if ((ctrl & INFINIPATH_C_FREEZEMODE) && !ipath_diag_inuse) {
 549                 /*
 550                  * parity errors in send memory are recoverable,
 551                  * just cancel the send (if indicated in * sendbuffererror),
 552                  * count the occurrence, unfreeze (if no other handled
 553                  * hardware error bits are set), and continue. They can
 554                  * occur if a processor speculative read is done to the PIO
 555                  * buffer while we are sending a packet, for example.
 556                  */
 557                 if ((hwerrs & TXE_PIO_PARITY) && ipath_ht_txe_recover(dd))
 558                         hwerrs &= ~TXE_PIO_PARITY;
 559                 if (hwerrs & RXE_EAGER_PARITY)
 560                         ipath_dev_err(dd, "RXE parity, Eager TID error is not "
 561                                 "recoverable\n");
 562                 if (!hwerrs) {
 563                         ipath_dbg("Clearing freezemode on ignored or "
 564                                   "recovered hardware error\n");
 565                         ipath_clear_freeze(dd);
 566                 }
 567         }
 568
 569         *msg = '\0';
 570
 571         /*
 572          * may someday want to decode into which bits are which
 573          * functional area for parity errors, etc.
 574          */
 575         if (hwerrs & (infinipath_hwe_htcmemparityerr_mask
 576                       << INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT)) {
 577                 bits = (u32) ((hwerrs >>
 578                                INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) &
 579                               INFINIPATH_HWE_HTCMEMPARITYERR_MASK);
 580                 snprintf(bitsmsg, sizeof bitsmsg, "[HTC Parity Errs %x] ",
 581                          bits);
 582                 strlcat(msg, bitsmsg, msgl);
 583         }
 584
 585         ipath_format_hwerrors(hwerrs,
 586                               ipath_6110_hwerror_msgs,
 587                               sizeof(ipath_6110_hwerror_msgs) /
 588                               sizeof(ipath_6110_hwerror_msgs[0]),
 589                               msg, msgl);
 590
 591         if (hwerrs & (_IPATH_HTLINK0_CRCBITS | _IPATH_HTLINK1_CRCBITS))
 592                 hwerr_crcbits(dd, hwerrs, msg, msgl);
 593
 594         if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
 595                 strlcat(msg, "[Memory BIST test failed, InfiniPath hardware unusable]",
 596                         msgl);
 597                 /* ignore from now on, so disable until driver reloaded */
 598                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
 599                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 600                                  dd->ipath_hwerrmask);
 601         }
 602 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |        \
 603                          INFINIPATH_HWE_COREPLL_RFSLIP |        \
 604                          INFINIPATH_HWE_HTBPLL_FBSLIP |         \
 605                          INFINIPATH_HWE_HTBPLL_RFSLIP |         \
 606                          INFINIPATH_HWE_HTAPLL_FBSLIP |         \
 607                          INFINIPATH_HWE_HTAPLL_RFSLIP)
 608
 609         if (hwerrs & _IPATH_PLL_FAIL) {
 610                 snprintf(bitsmsg, sizeof bitsmsg,
 611                          "[PLL failed (%llx), InfiniPath hardware unusable]",
 612                          (unsigned long long) (hwerrs & _IPATH_PLL_FAIL));
 613                 strlcat(msg, bitsmsg, msgl);
 614                 /* ignore from now on, so disable until driver reloaded */
 615                 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
 616                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 617                                  dd->ipath_hwerrmask);
 618         }
 619
 620         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
 621                 /*
 622                  * If it occurs, it is left masked since the eternal
 623                  * interface is unused
 624                  */
 625                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 626                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 627                                  dd->ipath_hwerrmask);
 628         }
 629
 630         if (hwerrs) {
 631                 /*
 632                  * if any set that we aren't ignoring; only
 633                  * make the complaint once, in case it's stuck
 634                  * or recurring, and we get here multiple
 635                  * times.
 636                  * force link down, so switch knows, and
 637                  * LEDs are turned off
 638                  */
 639                 if (dd->ipath_flags & IPATH_INITTED) {
 640                         ipath_set_linkstate(dd, IPATH_IB_LINKDOWN);
 641                         ipath_setup_ht_setextled(dd,
 642                                 INFINIPATH_IBCS_L_STATE_DOWN,
 643                                 INFINIPATH_IBCS_LT_STATE_DISABLED);
 644                         ipath_dev_err(dd, "Fatal Hardware Error (freeze "
 645                                           "mode), no longer usable, SN %.16s\n",
 646                                           dd->ipath_serial);
 647                         isfatal = 1;
 648                 }
 649                 *dd->ipath_statusp &= ~IPATH_STATUS_IB_READY;
 650                 /* mark as having had error */
 651                 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 652                 /*
 653                  * mark as not usable, at a minimum until driver
 654                  * is reloaded, probably until reboot, since no
 655                  * other reset is possible.
 656                  */
 657                 dd->ipath_flags &= ~IPATH_INITTED;
 658         }
 659         else
 660                 *msg = 0; /* recovered from all of them */
 661         if (*msg)
 662                 ipath_dev_err(dd, "%s hardware error\n", msg);
 663         if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg)
 664                 /*
 665                  * for status file; if no trailing brace is copied,
 666                  * we'll know it was truncated.
 667                  */
 668                 snprintf(dd->ipath_freezemsg,
 669                          dd->ipath_freezelen, "{%s}", msg);
 670
 671 bail:;
 672 }
 673
 674 /**
 675  * ipath_ht_boardname - fill in the board name
 676  * @dd: the infinipath device
 677  * @name: the output buffer
 678  * @namelen: the size of the output buffer
 679  *
 680  * fill in the board name, based on the board revision register
 681  */
 682 static int ipath_ht_boardname(struct ipath_devdata *dd, char *name,
 683                               size_t namelen)
 684 {
 685         char *n = NULL;
 686         u8 boardrev = dd->ipath_boardrev;
 687         int ret = 0;
 688
 689         switch (boardrev) {
 690         case 5:
 691                 /*
 692                  * original production board; two production levels, with
 693                  * different serial number ranges.   See ipath_ht_early_init() for
 694                  * case where we enable IPATH_GPIO_INTR for later serial # range.
 695                  * Original 112* serial number is no longer supported.
 696                  */
 697                 n = "InfiniPath_QHT7040";
 698                 break;
 699         case 7:
 700                 /* small form factor production board */
 701                 n = "InfiniPath_QHT7140";
 702                 break;
 703         default:                /* don't know, just print the number */
 704                 ipath_dev_err(dd, "Don't yet know about board "
 705                               "with ID %u\n", boardrev);
 706                 snprintf(name, namelen, "Unknown_InfiniPath_QHT7xxx_%u",
 707                          boardrev);
 708                 ret = 1;
 709                 break;
 710         }
 711         if (n)
 712                 snprintf(name, namelen, "%s", n);
 713
 714         if (ret) {
 715                 ipath_dev_err(dd, "Unsupported InfiniPath board %s!\n", name);
 716                 goto bail;
 717         }
 718         if (dd->ipath_majrev != 3 || (dd->ipath_minrev < 2 ||
 719                 dd->ipath_minrev > 4)) {
 720                 /*
 721                  * This version of the driver only supports Rev 3.2 - 3.4
 722                  */
 723                 ipath_dev_err(dd,
 724                               "Unsupported InfiniPath hardware revision %u.%u!\n",
 725                               dd->ipath_majrev, dd->ipath_minrev);
 726                 ret = 1;
 727                 goto bail;
 728         }
 729         /*
 730          * pkt/word counters are 32 bit, and therefore wrap fast enough
 731          * that we snapshot them from a timer, and maintain 64 bit shadow
 732          * copies
 733          */
 734         dd->ipath_flags |= IPATH_32BITCOUNTERS;
 735         dd->ipath_flags |= IPATH_GPIO_INTR;
 736         if (dd->ipath_htspeed != 800)
 737                 ipath_dev_err(dd,
 738                               "Incorrectly configured for HT @ %uMHz\n",
 739                               dd->ipath_htspeed);
 740         ret = 0;
 741
 742         /*
 743          * set here, not in ipath_init_*_funcs because we have to do
 744          * it after we can read chip registers.
 745          */
 746         dd->ipath_ureg_align =
 747                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
 748
 749 bail:
 750         return ret;
 751 }
 752
 753 static void ipath_check_htlink(struct ipath_devdata *dd)
 754 {
 755         u8 linkerr, link_off, i;
 756
 757         for (i = 0; i < 2; i++) {
 758                 link_off = dd->ipath_ht_slave_off + i * 4 + 0xd;
 759                 if (pci_read_config_byte(dd->pcidev, link_off, &linkerr))
 760                         dev_info(&dd->pcidev->dev, "Couldn't read "
 761                                  "linkerror%d of HT slave/primary block\n",
 762                                  i);
 763                 else if (linkerr & 0xf0) {
 764                         ipath_cdbg(VERBOSE, "HT linkerr%d bits 0x%x set, "
 765                                    "clearing\n", linkerr >> 4, i);
 766                         /*
 767                          * writing the linkerr bits that are set should
 768                          * clear them
 769                          */
 770                         if (pci_write_config_byte(dd->pcidev, link_off,
 771                                                   linkerr))
 772                                 ipath_dbg("Failed write to clear HT "
 773                                           "linkerror%d\n", i);
 774                         if (pci_read_config_byte(dd->pcidev, link_off,
 775                                                  &linkerr))
 776                                 dev_info(&dd->pcidev->dev,
 777                                          "Couldn't reread linkerror%d of "
 778                                          "HT slave/primary block\n", i);
 779                         else if (linkerr & 0xf0)
 780                                 dev_info(&dd->pcidev->dev,
 781                                          "HT linkerror%d bits 0x%x "
 782                                          "couldn't be cleared\n",
 783                                          i, linkerr >> 4);
 784                 }
 785         }
 786 }
 787
 788 static int ipath_setup_ht_reset(struct ipath_devdata *dd)
 789 {
 790         ipath_dbg("No reset possible for this InfiniPath hardware\n");
 791         return 0;
 792 }
 793
 794 #define HT_INTR_DISC_CONFIG  0x80       /* HT interrupt and discovery cap */
 795 #define HT_INTR_REG_INDEX    2  /* intconfig requires indirect accesses */
 796
 797 /*
 798  * Bits 13-15 of command==0 is slave/primary block.  Clear any HT CRC
 799  * errors.  We only bother to do this at load time, because it's OK if
 800  * it happened before we were loaded (first time after boot/reset),
 801  * but any time after that, it's fatal anyway.  Also need to not check
 802  * for for upper byte errors if we are in 8 bit mode, so figure out
 803  * our width.  For now, at least, also complain if it's 8 bit.
 804  */
 805 static void slave_or_pri_blk(struct ipath_devdata *dd, struct pci_dev *pdev,
 806                              int pos, u8 cap_type)
 807 {
 808         u8 linkwidth = 0, linkerr, link_a_b_off, link_off;
 809         u16 linkctrl = 0;
 810         int i;
 811
 812         dd->ipath_ht_slave_off = pos;
 813         /* command word, master_host bit */
 814         /* master host || slave */
 815         if ((cap_type >> 2) & 1)
 816                 link_a_b_off = 4;
 817         else
 818                 link_a_b_off = 0;
 819         ipath_cdbg(VERBOSE, "HT%u (Link %c) connected to processor\n",
 820                    link_a_b_off ? 1 : 0,
 821                    link_a_b_off ? 'B' : 'A');
 822
 823         link_a_b_off += pos;
 824
 825         /*
 826          * check both link control registers; clear both HT CRC sets if
 827          * necessary.
 828          */
 829         for (i = 0; i < 2; i++) {
 830                 link_off = pos + i * 4 + 0x4;
 831                 if (pci_read_config_word(pdev, link_off, &linkctrl))
 832                         ipath_dev_err(dd, "Couldn't read HT link control%d "
 833                                       "register\n", i);
 834                 else if (linkctrl & (0xf << 8)) {
 835                         ipath_cdbg(VERBOSE, "Clear linkctrl%d CRC Error "
 836                                    "bits %x\n", i, linkctrl & (0xf << 8));
 837                         /*
 838                          * now write them back to clear the error.
 839                          */
 840                         pci_write_config_byte(pdev, link_off,
 841                                               linkctrl & (0xf << 8));
 842                 }
 843         }
 844
 845         /*
 846          * As with HT CRC bits, same for protocol errors that might occur
 847          * during boot.
 848          */
 849         for (i = 0; i < 2; i++) {
 850                 link_off = pos + i * 4 + 0xd;
 851                 if (pci_read_config_byte(pdev, link_off, &linkerr))
 852                         dev_info(&pdev->dev, "Couldn't read linkerror%d "
 853                                  "of HT slave/primary block\n", i);
 854                 else if (linkerr & 0xf0) {
 855                         ipath_cdbg(VERBOSE, "HT linkerr%d bits 0x%x set, "
 856                                    "clearing\n", linkerr >> 4, i);
 857                         /*
 858                          * writing the linkerr bits that are set will clear
 859                          * them
 860                          */
 861                         if (pci_write_config_byte
 862                             (pdev, link_off, linkerr))
 863                                 ipath_dbg("Failed write to clear HT "
 864                                           "linkerror%d\n", i);
 865                         if (pci_read_config_byte(pdev, link_off, &linkerr))
 866                                 dev_info(&pdev->dev, "Couldn't reread "
 867                                          "linkerror%d of HT slave/primary "
 868                                          "block\n", i);
 869                         else if (linkerr & 0xf0)
 870                                 dev_info(&pdev->dev, "HT linkerror%d bits "
 871                                          "0x%x couldn't be cleared\n",
 872                                          i, linkerr >> 4);
 873                 }
 874         }
 875
 876         /*
 877          * this is just for our link to the host, not devices connected
 878          * through tunnel.
 879          */
 880
 881         if (pci_read_config_byte(pdev, link_a_b_off + 7, &linkwidth))
 882                 ipath_dev_err(dd, "Couldn't read HT link width "
 883                               "config register\n");
 884         else {
 885                 u32 width;
 886                 switch (linkwidth & 7) {
 887                 case 5:
 888                         width = 4;
 889                         break;
 890                 case 4:
 891                         width = 2;
 892                         break;
 893                 case 3:
 894                         width = 32;
 895                         break;
 896                 case 1:
 897                         width = 16;
 898                         break;
 899                 case 0:
 900                 default:        /* if wrong, assume 8 bit */
 901                         width = 8;
 902                         break;
 903                 }
 904
 905                 dd->ipath_htwidth = width;
 906
 907                 if (linkwidth != 0x11) {
 908                         ipath_dev_err(dd, "Not configured for 16 bit HT "
 909                                       "(%x)\n", linkwidth);
 910                         if (!(linkwidth & 0xf)) {
 911                                 ipath_dbg("Will ignore HT lane1 errors\n");
 912                                 dd->ipath_flags |= IPATH_8BIT_IN_HT0;
 913                         }
 914                 }
 915         }
 916
 917         /*
 918          * this is just for our link to the host, not devices connected
 919          * through tunnel.
 920          */
 921         if (pci_read_config_byte(pdev, link_a_b_off + 0xd, &linkwidth))
 922                 ipath_dev_err(dd, "Couldn't read HT link frequency "
 923                               "config register\n");
 924         else {
 925                 u32 speed;
 926                 switch (linkwidth & 0xf) {
 927                 case 6:
 928                         speed = 1000;
 929                         break;
 930                 case 5:
 931                         speed = 800;
 932                         break;
 933                 case 4:
 934                         speed = 600;
 935                         break;
 936                 case 3:
 937                         speed = 500;
 938                         break;
 939                 case 2:
 940                         speed = 400;
 941                         break;
 942                 case 1:
 943                         speed = 300;
 944                         break;
 945                 default:
 946                         /*
 947                          * assume reserved and vendor-specific are 200...
 948                          */
 949                 case 0:
 950                         speed = 200;
 951                         break;
 952                 }
 953                 dd->ipath_htspeed = speed;
 954         }
 955 }
 956
 957 static int ipath_ht_intconfig(struct ipath_devdata *dd)
 958 {
 959         int ret;
 960
 961         if (dd->ipath_intconfig) {
 962                 ipath_write_kreg(dd, dd->ipath_kregs->kr_interruptconfig,
 963                                  dd->ipath_intconfig);  /* interrupt address */
 964                 ret = 0;
 965         } else {
 966                 ipath_dev_err(dd, "No interrupts enabled, couldn't setup "
 967                               "interrupt address\n");
 968                 ret = -EINVAL;
 969         }
 970
 971         return ret;
 972 }
 973
 974 static void ipath_ht_irq_update(struct pci_dev *dev, int irq,
 975                                 struct ht_irq_msg *msg)
 976 {
 977         struct ipath_devdata *dd = pci_get_drvdata(dev);
 978         u64 prev_intconfig = dd->ipath_intconfig;
 979
 980         dd->ipath_intconfig = msg->address_lo;
 981         dd->ipath_intconfig |= ((u64) msg->address_hi) << 32;
 982
 983         /*
 984          * If the previous value of dd->ipath_intconfig is zero, we're
 985          * getting configured for the first time, and must not program the
 986          * intconfig register here (it will be programmed later, when the
 987          * hardware is ready).  Otherwise, we should.
 988          */
 989         if (prev_intconfig)
 990                 ipath_ht_intconfig(dd);
 991 }
 992
 993 /**
 994  * ipath_setup_ht_config - setup the interruptconfig register
 995  * @dd: the infinipath device
 996  * @pdev: the PCI device
 997  *
 998  * setup the interruptconfig register from the HT config info.
 999  * Also clear CRC errors in HT linkcontrol, if necessary.
1000  * This is done only for the real hardware.  It is done before
1001  * chip address space is initted, so can't touch infinipath registers
1002  */
1003 static int ipath_setup_ht_config(struct ipath_devdata *dd,
1004                                  struct pci_dev *pdev)
1005 {
1006         int pos, ret;
1007
1008         ret = __ht_create_irq(pdev, 0, ipath_ht_irq_update);
1009         if (ret < 0) {
1010                 ipath_dev_err(dd, "Couldn't create interrupt handler: "
1011                               "err %d\n", ret);
1012                 goto bail;
1013         }
1014         dd->ipath_irq = ret;
1015         ret = 0;
1016
1017         /*
1018          * Handle clearing CRC errors in linkctrl register if necessary.  We
1019          * do this early, before we ever enable errors or hardware errors,
1020          * mostly to avoid causing the chip to enter freeze mode.
1021          */
1022         pos = pci_find_capability(pdev, PCI_CAP_ID_HT);
1023         if (!pos) {
1024                 ipath_dev_err(dd, "Couldn't find HyperTransport "
1025                               "capability; no interrupts\n");
1026                 ret = -ENODEV;
1027                 goto bail;
1028         }
1029         do {
1030                 u8 cap_type;
1031
1032                 /*
1033                  * The HT capability type byte is 3 bytes after the
1034                  * capability byte.
1035                  */
1036                 if (pci_read_config_byte(pdev, pos + 3, &cap_type)) {
1037                         dev_info(&pdev->dev, "Couldn't read config "
1038                                  "command @ %d\n", pos);
1039                         continue;
1040                 }
1041                 if (!(cap_type & 0xE0))
1042                         slave_or_pri_blk(dd, pdev, pos, cap_type);
1043         } while ((pos = pci_find_next_capability(pdev, pos,
1044                                                  PCI_CAP_ID_HT)));
1045
1046         dd->ipath_flags |= IPATH_SWAP_PIOBUFS;
1047
1048 bail:
1049         return ret;
1050 }
1051
1052 /**
1053  * ipath_setup_ht_cleanup - clean up any per-chip chip-specific stuff
1054  * @dd: the infinipath device
1055  *
1056  * Called during driver unload.
1057  * This is currently a nop for the HT chip, not for all chips
1058  */
1059 static void ipath_setup_ht_cleanup(struct ipath_devdata *dd)
1060 {
1061 }
1062
1063 /**
1064  * ipath_setup_ht_setextled - set the state of the two external LEDs
1065  * @dd: the infinipath device
1066  * @lst: the L state
1067  * @ltst: the LT state
1068  *
1069  * Set the state of the two external LEDs, to indicate physical and
1070  * logical state of IB link.   For this chip (at least with recommended
1071  * board pinouts), LED1 is Green (physical state), and LED2 is Yellow
1072  * (logical state)
1073  *
1074  * Note:  We try to match the Mellanox HCA LED behavior as best
1075  * we can.  Green indicates physical link state is OK (something is
1076  * plugged in, and we can train).
1077  * Amber indicates the link is logically up (ACTIVE).
1078  * Mellanox further blinks the amber LED to indicate data packet
1079  * activity, but we have no hardware support for that, so it would
1080  * require waking up every 10-20 msecs and checking the counters
1081  * on the chip, and then turning the LED off if appropriate.  That's
1082  * visible overhead, so not something we will do.
1083  *
1084  */
1085 static void ipath_setup_ht_setextled(struct ipath_devdata *dd,
1086                                      u64 lst, u64 ltst)
1087 {
1088         u64 extctl;
1089         unsigned long flags = 0;
1090
1091         /* the diags use the LED to indicate diag info, so we leave
1092          * the external LED alone when the diags are running */
1093         if (ipath_diag_inuse)
1094                 return;
1095
1096         /* Allow override of LED display for, e.g. Locating system in rack */
1097         if (dd->ipath_led_override) {
1098                 ltst = (dd->ipath_led_override & IPATH_LED_PHYS)
1099                         ? INFINIPATH_IBCS_LT_STATE_LINKUP
1100                         : INFINIPATH_IBCS_LT_STATE_DISABLED;
1101                 lst = (dd->ipath_led_override & IPATH_LED_LOG)
1102                         ? INFINIPATH_IBCS_L_STATE_ACTIVE
1103                         : INFINIPATH_IBCS_L_STATE_DOWN;
1104         }
1105
1106         spin_lock_irqsave(&dd->ipath_gpio_lock, flags);
1107         /*
1108          * start by setting both LED control bits to off, then turn
1109          * on the appropriate bit(s).
1110          */
1111         if (dd->ipath_boardrev == 8) { /* LS/X-1 uses different pins */
1112                 /*
1113                  * major difference is that INFINIPATH_EXTC_LEDGBLERR_OFF
1114                  * is inverted,  because it is normally used to indicate
1115                  * a hardware fault at reset, if there were errors
1116                  */
1117                 extctl = (dd->ipath_extctrl & ~INFINIPATH_EXTC_LEDGBLOK_ON)
1118                         | INFINIPATH_EXTC_LEDGBLERR_OFF;
1119                 if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
1120                         extctl &= ~INFINIPATH_EXTC_LEDGBLERR_OFF;
1121                 if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
1122                         extctl |= INFINIPATH_EXTC_LEDGBLOK_ON;
1123         }
1124         else {
1125                 extctl = dd->ipath_extctrl &
1126                         ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
1127                           INFINIPATH_EXTC_LED2PRIPORT_ON);
1128                 if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
1129                         extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
1130                 if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
1131                         extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
1132         }
1133         dd->ipath_extctrl = extctl;
1134         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
1135         spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);
1136 }
1137
1138 static void ipath_init_ht_variables(struct ipath_devdata *dd)
1139 {
1140         dd->ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
1141         dd->ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
1142         dd->ipath_gpio_sda = IPATH_GPIO_SDA;
1143         dd->ipath_gpio_scl = IPATH_GPIO_SCL;
1144
1145         /* Fill in shifts for RcvCtrl. */
1146         dd->ipath_r_portenable_shift = INFINIPATH_R_PORTENABLE_SHIFT;
1147         dd->ipath_r_intravail_shift = INFINIPATH_R_INTRAVAIL_SHIFT;
1148         dd->ipath_r_tailupd_shift = INFINIPATH_R_TAILUPD_SHIFT;
1149         dd->ipath_r_portcfg_shift = 0; /* Not on IBA6110 */
1150
1151         dd->ipath_i_bitsextant =
1152                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
1153                 (INFINIPATH_I_RCVAVAIL_MASK <<
1154                  INFINIPATH_I_RCVAVAIL_SHIFT) |
1155                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
1156                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
1157
1158         dd->ipath_e_bitsextant =
1159                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
1160                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
1161                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
1162                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
1163                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
1164                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
1165                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
1166                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
1167                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
1168                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
1169                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
1170                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
1171                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
1172                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
1173                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
1174                 INFINIPATH_E_HARDWARE;
1175
1176         dd->ipath_hwe_bitsextant =
1177                 (INFINIPATH_HWE_HTCMEMPARITYERR_MASK <<
1178                  INFINIPATH_HWE_HTCMEMPARITYERR_SHIFT) |
1179                 (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1180                  INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
1181                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1182                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
1183                 INFINIPATH_HWE_HTCLNKABYTE0CRCERR |
1184                 INFINIPATH_HWE_HTCLNKABYTE1CRCERR |
1185                 INFINIPATH_HWE_HTCLNKBBYTE0CRCERR |
1186                 INFINIPATH_HWE_HTCLNKBBYTE1CRCERR |
1187                 INFINIPATH_HWE_HTCMISCERR4 |
1188                 INFINIPATH_HWE_HTCMISCERR5 | INFINIPATH_HWE_HTCMISCERR6 |
1189                 INFINIPATH_HWE_HTCMISCERR7 |
1190                 INFINIPATH_HWE_HTCBUSTREQPARITYERR |
1191                 INFINIPATH_HWE_HTCBUSTRESPPARITYERR |
1192                 INFINIPATH_HWE_HTCBUSIREQPARITYERR |
1193                 INFINIPATH_HWE_RXDSYNCMEMPARITYERR |
1194                 INFINIPATH_HWE_MEMBISTFAILED |
1195                 INFINIPATH_HWE_COREPLL_FBSLIP |
1196                 INFINIPATH_HWE_COREPLL_RFSLIP |
1197                 INFINIPATH_HWE_HTBPLL_FBSLIP |
1198                 INFINIPATH_HWE_HTBPLL_RFSLIP |
1199                 INFINIPATH_HWE_HTAPLL_FBSLIP |
1200                 INFINIPATH_HWE_HTAPLL_RFSLIP |
1201                 INFINIPATH_HWE_SERDESPLLFAILED |
1202                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
1203                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
1204
1205         dd->ipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
1206         dd->ipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
1207
1208         /*
1209          * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
1210          * 2 is Some Misc, 3 is reserved for future.
1211          */
1212         dd->ipath_eep_st_masks[0].hwerrs_to_log =
1213                 INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1214                 INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT;
1215
1216         dd->ipath_eep_st_masks[1].hwerrs_to_log =
1217                 INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1218                 INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT;
1219
1220         dd->ipath_eep_st_masks[2].errs_to_log =
1221                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET;
1222
1223 }
1224
1225 /**
1226  * ipath_ht_init_hwerrors - enable hardware errors
1227  * @dd: the infinipath device
1228  *
1229  * now that we have finished initializing everything that might reasonably
1230  * cause a hardware error, and cleared those errors bits as they occur,
1231  * we can enable hardware errors in the mask (potentially enabling
1232  * freeze mode), and enable hardware errors as errors (along with
1233  * everything else) in errormask
1234  */
1235 static void ipath_ht_init_hwerrors(struct ipath_devdata *dd)
1236 {
1237         ipath_err_t val;
1238         u64 extsval;
1239
1240         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
1241
1242         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
1243                 ipath_dev_err(dd, "MemBIST did not complete!\n");
1244         if (extsval & INFINIPATH_EXTS_MEMBIST_CORRECT)
1245                 ipath_dbg("MemBIST corrected\n");
1246
1247         ipath_check_htlink(dd);
1248
1249         /* barring bugs, all hwerrors become interrupts, which can */
1250         val = -1LL;
1251         /* don't look at crc lane1 if 8 bit */
1252         if (dd->ipath_flags & IPATH_8BIT_IN_HT0)
1253                 val &= ~infinipath_hwe_htclnkabyte1crcerr;
1254         /* don't look at crc lane1 if 8 bit */
1255         if (dd->ipath_flags & IPATH_8BIT_IN_HT1)
1256                 val &= ~infinipath_hwe_htclnkbbyte1crcerr;
1257
1258         /*
1259          * disable RXDSYNCMEMPARITY because external serdes is unused,
1260          * and therefore the logic will never be used or initialized,
1261          * and uninitialized state will normally result in this error
1262          * being asserted.  Similarly for the external serdess pll
1263          * lock signal.
1264          */
1265         val &= ~(INFINIPATH_HWE_SERDESPLLFAILED |
1266                  INFINIPATH_HWE_RXDSYNCMEMPARITYERR);
1267
1268         /*
1269          * Disable MISCERR4 because of an inversion in the HT core
1270          * logic checking for errors that cause this bit to be set.
1271          * The errata can also cause the protocol error bit to be set
1272          * in the HT config space linkerror register(s).
1273          */
1274         val &= ~INFINIPATH_HWE_HTCMISCERR4;
1275
1276         /*
1277          * PLL ignored because MDIO interface has a logic problem
1278          * for reads, on Comstock and Ponderosa.  BRINGUP
1279          */
1280         if (dd->ipath_boardrev == 4 || dd->ipath_boardrev == 9)
1281                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
1282         dd->ipath_hwerrmask = val;
1283 }
1284
1285 /**
1286  * ipath_ht_bringup_serdes - bring up the serdes
1287  * @dd: the infinipath device
1288  */
1289 static int ipath_ht_bringup_serdes(struct ipath_devdata *dd)
1290 {
1291         u64 val, config1;
1292         int ret = 0, change = 0;
1293
1294         ipath_dbg("Trying to bringup serdes\n");
1295
1296         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
1297             INFINIPATH_HWE_SERDESPLLFAILED)
1298         {
1299                 ipath_dbg("At start, serdes PLL failed bit set in "
1300                           "hwerrstatus, clearing and continuing\n");
1301                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
1302                                  INFINIPATH_HWE_SERDESPLLFAILED);
1303         }
1304
1305         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1306         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
1307
1308         ipath_cdbg(VERBOSE, "Initial serdes status is config0=%llx "
1309                    "config1=%llx, sstatus=%llx xgxs %llx\n",
1310                    (unsigned long long) val, (unsigned long long) config1,
1311                    (unsigned long long)
1312                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
1313                    (unsigned long long)
1314                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
1315
1316         /* force reset on */
1317         val |= INFINIPATH_SERDC0_RESET_PLL
1318                 /* | INFINIPATH_SERDC0_RESET_MASK */
1319                 ;
1320         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
1321         udelay(15);             /* need pll reset set at least for a bit */
1322
1323         if (val & INFINIPATH_SERDC0_RESET_PLL) {
1324                 u64 val2 = val &= ~INFINIPATH_SERDC0_RESET_PLL;
1325                 /* set lane resets, and tx idle, during pll reset */
1326                 val2 |= INFINIPATH_SERDC0_RESET_MASK |
1327                         INFINIPATH_SERDC0_TXIDLE;
1328                 ipath_cdbg(VERBOSE, "Clearing serdes PLL reset (writing "
1329                            "%llx)\n", (unsigned long long) val2);
1330                 ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0,
1331                                  val2);
1332                 /*
1333                  * be sure chip saw it
1334                  */
1335                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
1336                 /*
1337                  * need pll reset clear at least 11 usec before lane
1338                  * resets cleared; give it a few more
1339                  */
1340                 udelay(15);
1341                 val = val2;     /* for check below */
1342         }
1343
1344         if (val & (INFINIPATH_SERDC0_RESET_PLL |
1345                    INFINIPATH_SERDC0_RESET_MASK |
1346                    INFINIPATH_SERDC0_TXIDLE)) {
1347                 val &= ~(INFINIPATH_SERDC0_RESET_PLL |
1348                          INFINIPATH_SERDC0_RESET_MASK |
1349                          INFINIPATH_SERDC0_TXIDLE);
1350                 /* clear them */
1351                 ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0,
1352                                  val);
1353         }
1354
1355         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1356         if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
1357              INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
1358                 val &= ~(INFINIPATH_XGXS_MDIOADDR_MASK <<
1359                          INFINIPATH_XGXS_MDIOADDR_SHIFT);
1360                 /*
1361                  * we use address 3
1362                  */
1363                 val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
1364                 change = 1;
1365         }
1366         if (val & INFINIPATH_XGXS_RESET) {
1367                 /* normally true after boot */
1368                 val &= ~INFINIPATH_XGXS_RESET;
1369                 change = 1;
1370         }
1371         if (((val >> INFINIPATH_XGXS_RX_POL_SHIFT) &
1372              INFINIPATH_XGXS_RX_POL_MASK) != dd->ipath_rx_pol_inv ) {
1373                 /* need to compensate for Tx inversion in partner */
1374                 val &= ~(INFINIPATH_XGXS_RX_POL_MASK <<
1375                          INFINIPATH_XGXS_RX_POL_SHIFT);
1376                 val |= dd->ipath_rx_pol_inv <<
1377                         INFINIPATH_XGXS_RX_POL_SHIFT;
1378                 change = 1;
1379         }
1380         if (change)
1381                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1382
1383         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1384
1385         /* clear current and de-emphasis bits */
1386         config1 &= ~0x0ffffffff00ULL;
1387         /* set current to 20ma */
1388         config1 |= 0x00000000000ULL;
1389         /* set de-emphasis to -5.68dB */
1390         config1 |= 0x0cccc000000ULL;
1391         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
1392
1393         ipath_cdbg(VERBOSE, "After setup: serdes status is config0=%llx "
1394                    "config1=%llx, sstatus=%llx xgxs %llx\n",
1395                    (unsigned long long) val, (unsigned long long) config1,
1396                    (unsigned long long)
1397                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
1398                    (unsigned long long)
1399                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
1400
1401         if (!ipath_waitfor_mdio_cmdready(dd)) {
1402                 ipath_write_kreg(dd, dd->ipath_kregs->kr_mdio,
1403                                  ipath_mdio_req(IPATH_MDIO_CMD_READ, 31,
1404                                                 IPATH_MDIO_CTRL_XGXS_REG_8,
1405                                                 0));
1406                 if (ipath_waitfor_complete(dd, dd->ipath_kregs->kr_mdio,
1407                                            IPATH_MDIO_DATAVALID, &val))
1408                         ipath_dbg("Never got MDIO data for XGXS status "
1409                                   "read\n");
1410                 else
1411                         ipath_cdbg(VERBOSE, "MDIO Read reg8, "
1412                                    "'bank' 31 %x\n", (u32) val);
1413         } else
1414                 ipath_dbg("Never got MDIO cmdready for XGXS status read\n");
1415
1416         return ret;             /* for now, say we always succeeded */
1417 }
1418
1419 /**
1420  * ipath_ht_quiet_serdes - set serdes to txidle
1421  * @dd: the infinipath device
1422  * driver is being unloaded
1423  */
1424 static void ipath_ht_quiet_serdes(struct ipath_devdata *dd)
1425 {
1426         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
1427
1428         val |= INFINIPATH_SERDC0_TXIDLE;
1429         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
1430                   (unsigned long long) val);
1431         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
1432 }
1433
1434 /**
1435  * ipath_pe_put_tid - write a TID in chip
1436  * @dd: the infinipath device
1437  * @tidptr: pointer to the expected TID (in chip) to udpate
1438  * @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0) for expected
1439  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1440  *
1441  * This exists as a separate routine to allow for special locking etc.
1442  * It's used for both the full cleanup on exit, as well as the normal
1443  * setup and teardown.
1444  */
1445 static void ipath_ht_put_tid(struct ipath_devdata *dd,
1446                              u64 __iomem *tidptr, u32 type,
1447                              unsigned long pa)
1448 {
1449         if (!dd->ipath_kregbase)
1450                 return;
1451
1452         if (pa != dd->ipath_tidinvalid) {
1453                 if (unlikely((pa & ~INFINIPATH_RT_ADDR_MASK))) {
1454                         dev_info(&dd->pcidev->dev,
1455                                  "physaddr %lx has more than "
1456                                  "40 bits, using only 40!!!\n", pa);
1457                         pa &= INFINIPATH_RT_ADDR_MASK;
1458                 }
1459                 if (type == RCVHQ_RCV_TYPE_EAGER)
1460                         pa |= dd->ipath_tidtemplate;
1461                 else {
1462                         /* in words (fixed, full page).  */
1463                         u64 lenvalid = PAGE_SIZE >> 2;
1464                         lenvalid <<= INFINIPATH_RT_BUFSIZE_SHIFT;
1465                         pa |= lenvalid | INFINIPATH_RT_VALID;
1466                 }
1467         }
1468         writeq(pa, tidptr);
1469 }
1470
1471
1472 /**
1473  * ipath_ht_clear_tid - clear all TID entries for a port, expected and eager
1474  * @dd: the infinipath device
1475  * @port: the port
1476  *
1477  * Used from ipath_close(), and at chip initialization.
1478  */
1479 static void ipath_ht_clear_tids(struct ipath_devdata *dd, unsigned port)
1480 {
1481         u64 __iomem *tidbase;
1482         int i;
1483
1484         if (!dd->ipath_kregbase)
1485                 return;
1486
1487         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1488
1489         /*
1490          * need to invalidate all of the expected TID entries for this
1491          * port, so we don't have valid entries that might somehow get
1492          * used (early in next use of this port, or through some bug)
1493          */
1494         tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
1495                                    dd->ipath_rcvtidbase +
1496                                    port * dd->ipath_rcvtidcnt *
1497                                    sizeof(*tidbase));
1498         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1499                 ipath_ht_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
1500                                  dd->ipath_tidinvalid);
1501
1502         tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
1503                                    dd->ipath_rcvegrbase +
1504                                    port * dd->ipath_rcvegrcnt *
1505                                    sizeof(*tidbase));
1506
1507         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1508                 ipath_ht_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
1509                                  dd->ipath_tidinvalid);
1510 }
1511
1512 /**
1513  * ipath_ht_tidtemplate - setup constants for TID updates
1514  * @dd: the infinipath device
1515  *
1516  * We setup stuff that we use a lot, to avoid calculating each time
1517  */
1518 static void ipath_ht_tidtemplate(struct ipath_devdata *dd)
1519 {
1520         dd->ipath_tidtemplate = dd->ipath_ibmaxlen >> 2;
1521         dd->ipath_tidtemplate <<= INFINIPATH_RT_BUFSIZE_SHIFT;
1522         dd->ipath_tidtemplate |= INFINIPATH_RT_VALID;
1523
1524         /*
1525          * work around chip errata bug 7358, by marking invalid tids
1526          * as having max length
1527          */
1528         dd->ipath_tidinvalid = (-1LL & INFINIPATH_RT_BUFSIZE_MASK) <<
1529                 INFINIPATH_RT_BUFSIZE_SHIFT;
1530 }
1531
1532 static int ipath_ht_early_init(struct ipath_devdata *dd)
1533 {
1534         u32 __iomem *piobuf;
1535         u32 pioincr, val32;
1536         int i;
1537
1538         /*
1539          * one cache line; long IB headers will spill over into received
1540          * buffer
1541          */
1542         dd->ipath_rcvhdrentsize = 16;
1543         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1544
1545         /*
1546          * For HT, we allocate a somewhat overly large eager buffer,
1547          * such that we can guarantee that we can receive the largest
1548          * packet that we can send out.  To truly support a 4KB MTU,
1549          * we need to bump this to a large value.  To date, other than
1550          * testing, we have never encountered an HCA that can really
1551          * send 4KB MTU packets, so we do not handle that (we'll get
1552          * errors interrupts if we ever see one).
1553          */
1554         dd->ipath_rcvegrbufsize = dd->ipath_piosize2k;
1555
1556         /*
1557          * the min() check here is currently a nop, but it may not
1558          * always be, depending on just how we do ipath_rcvegrbufsize
1559          */
1560         dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
1561                                  dd->ipath_rcvegrbufsize);
1562         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1563         ipath_ht_tidtemplate(dd);
1564
1565         /*
1566          * zero all the TID entries at startup.  We do this for sanity,
1567          * in case of a previous driver crash of some kind, and also
1568          * because the chip powers up with these memories in an unknown
1569          * state.  Use portcnt, not cfgports, since this is for the
1570          * full chip, not for current (possibly different) configuration
1571          * value.
1572          * Chip Errata bug 6447
1573          */
1574         for (val32 = 0; val32 < dd->ipath_portcnt; val32++)
1575                 ipath_ht_clear_tids(dd, val32);
1576
1577         /*
1578          * write the pbc of each buffer, to be sure it's initialized, then
1579          * cancel all the buffers, and also abort any packets that might
1580          * have been in flight for some reason (the latter is for driver
1581          * unload/reload, but isn't a bad idea at first init).  PIO send
1582          * isn't enabled at this point, so there is no danger of sending
1583          * these out on the wire.
1584          * Chip Errata bug 6610
1585          */
1586         piobuf = (u32 __iomem *) (((char __iomem *)(dd->ipath_kregbase)) +
1587                                   dd->ipath_piobufbase);
1588         pioincr = dd->ipath_palign / sizeof(*piobuf);
1589         for (i = 0; i < dd->ipath_piobcnt2k; i++) {
1590                 /*
1591                  * reasonable word count, just to init pbc
1592                  */
1593                 writel(16, piobuf);
1594                 piobuf += pioincr;
1595         }
1596
1597         ipath_get_eeprom_info(dd);
1598         if (dd->ipath_boardrev == 5 && dd->ipath_serial[0] == '1' &&
1599                 dd->ipath_serial[1] == '2' && dd->ipath_serial[2] == '8') {
1600                 /*
1601                  * Later production QHT7040 has same changes as QHT7140, so
1602                  * can use GPIO interrupts.  They have serial #'s starting
1603                  * with 128, rather than 112.
1604                  */
1605                 if (dd->ipath_serial[0] == '1' &&
1606                     dd->ipath_serial[1] == '2' &&
1607                     dd->ipath_serial[2] == '8')
1608                         dd->ipath_flags |= IPATH_GPIO_INTR;
1609                 else {
1610                         ipath_dev_err(dd, "Unsupported InfiniPath board "
1611                                 "(serial number %.16s)!\n",
1612                                 dd->ipath_serial);
1613                         return 1;
1614                 }
1615         }
1616
1617         if (dd->ipath_minrev >= 4) {
1618                 /* Rev4+ reports extra errors via internal GPIO pins */
1619                 dd->ipath_flags |= IPATH_GPIO_ERRINTRS;
1620                 dd->ipath_gpio_mask |= IPATH_GPIO_ERRINTR_MASK;
1621                 ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
1622                                  dd->ipath_gpio_mask);
1623         }
1624
1625         return 0;
1626 }
1627
1628
1629 static int ipath_ht_txe_recover(struct ipath_devdata *dd)
1630 {
1631         int cnt = ++ipath_stats.sps_txeparity;
1632         if (cnt >= IPATH_MAX_PARITY_ATTEMPTS)  {
1633                 if (cnt == IPATH_MAX_PARITY_ATTEMPTS)
1634                         ipath_dev_err(dd,
1635                                 "Too many attempts to recover from "
1636                                 "TXE parity, giving up\n");
1637                 return 0;
1638         }
1639         dev_info(&dd->pcidev->dev,
1640                 "Recovering from TXE PIO parity error\n");
1641         return 1;
1642 }
1643
1644
1645 /**
1646  * ipath_init_ht_get_base_info - set chip-specific flags for user code
1647  * @dd: the infinipath device
1648  * @kbase: ipath_base_info pointer
1649  *
1650  * We set the PCIE flag because the lower bandwidth on PCIe vs
1651  * HyperTransport can affect some user packet algorithms.
1652  */
1653 static int ipath_ht_get_base_info(struct ipath_portdata *pd, void *kbase)
1654 {
1655         struct ipath_base_info *kinfo = kbase;
1656
1657         kinfo->spi_runtime_flags |= IPATH_RUNTIME_HT |
1658                 IPATH_RUNTIME_PIO_REGSWAPPED;
1659
1660         if (pd->port_dd->ipath_minrev < 4)
1661                 kinfo->spi_runtime_flags |= IPATH_RUNTIME_RCVHDR_COPY;
1662
1663         return 0;
1664 }
1665
1666 static void ipath_ht_free_irq(struct ipath_devdata *dd)
1667 {
1668         free_irq(dd->ipath_irq, dd);
1669         ht_destroy_irq(dd->ipath_irq);
1670         dd->ipath_irq = 0;
1671         dd->ipath_intconfig = 0;
1672 }
1673
1674 static void ipath_ht_config_ports(struct ipath_devdata *dd, ushort cfgports)
1675 {
1676         dd->ipath_portcnt =
1677                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
1678         dd->ipath_p0_rcvegrcnt =
1679                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
1680 }
1681
1682 static void ipath_ht_read_counters(struct ipath_devdata *dd,
1683                                    struct infinipath_counters *cntrs)
1684 {
1685         cntrs->LBIntCnt =
1686                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBIntCnt));
1687         cntrs->LBFlowStallCnt =
1688                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBFlowStallCnt));
1689         cntrs->TxSDmaDescCnt = 0;
1690         cntrs->TxUnsupVLErrCnt =
1691                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnsupVLErrCnt));
1692         cntrs->TxDataPktCnt =
1693                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDataPktCnt));
1694         cntrs->TxFlowPktCnt =
1695                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowPktCnt));
1696         cntrs->TxDwordCnt =
1697                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDwordCnt));
1698         cntrs->TxLenErrCnt =
1699                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxLenErrCnt));
1700         cntrs->TxMaxMinLenErrCnt =
1701                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxMaxMinLenErrCnt));
1702         cntrs->TxUnderrunCnt =
1703                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnderrunCnt));
1704         cntrs->TxFlowStallCnt =
1705                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowStallCnt));
1706         cntrs->TxDroppedPktCnt =
1707                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDroppedPktCnt));
1708         cntrs->RxDroppedPktCnt =
1709                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDroppedPktCnt));
1710         cntrs->RxDataPktCnt =
1711                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDataPktCnt));
1712         cntrs->RxFlowPktCnt =
1713                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowPktCnt));
1714         cntrs->RxDwordCnt =
1715                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDwordCnt));
1716         cntrs->RxLenErrCnt =
1717                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLenErrCnt));
1718         cntrs->RxMaxMinLenErrCnt =
1719                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxMaxMinLenErrCnt));
1720         cntrs->RxICRCErrCnt =
1721                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxICRCErrCnt));
1722         cntrs->RxVCRCErrCnt =
1723                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxVCRCErrCnt));
1724         cntrs->RxFlowCtrlErrCnt =
1725                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowCtrlErrCnt));
1726         cntrs->RxBadFormatCnt =
1727                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBadFormatCnt));
1728         cntrs->RxLinkProblemCnt =
1729                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLinkProblemCnt));
1730         cntrs->RxEBPCnt =
1731                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxEBPCnt));
1732         cntrs->RxLPCRCErrCnt =
1733                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLPCRCErrCnt));
1734         cntrs->RxBufOvflCnt =
1735                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBufOvflCnt));
1736         cntrs->RxTIDFullErrCnt =
1737                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDFullErrCnt));
1738         cntrs->RxTIDValidErrCnt =
1739                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDValidErrCnt));
1740         cntrs->RxPKeyMismatchCnt =
1741                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxPKeyMismatchCnt));
1742         cntrs->RxP0HdrEgrOvflCnt =
1743                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt));
1744         cntrs->RxP1HdrEgrOvflCnt =
1745                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP1HdrEgrOvflCnt));
1746         cntrs->RxP2HdrEgrOvflCnt =
1747                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP2HdrEgrOvflCnt));
1748         cntrs->RxP3HdrEgrOvflCnt =
1749                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP3HdrEgrOvflCnt));
1750         cntrs->RxP4HdrEgrOvflCnt =
1751                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP4HdrEgrOvflCnt));
1752         cntrs->RxP5HdrEgrOvflCnt =
1753                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP5HdrEgrOvflCnt));
1754         cntrs->RxP6HdrEgrOvflCnt =
1755                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP6HdrEgrOvflCnt));
1756         cntrs->RxP7HdrEgrOvflCnt =
1757                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP7HdrEgrOvflCnt));
1758         cntrs->RxP8HdrEgrOvflCnt =
1759                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP8HdrEgrOvflCnt));
1760         cntrs->RxP9HdrEgrOvflCnt = 0;
1761         cntrs->RxP10HdrEgrOvflCnt = 0;
1762         cntrs->RxP11HdrEgrOvflCnt = 0;
1763         cntrs->RxP12HdrEgrOvflCnt = 0;
1764         cntrs->RxP13HdrEgrOvflCnt = 0;
1765         cntrs->RxP14HdrEgrOvflCnt = 0;
1766         cntrs->RxP15HdrEgrOvflCnt = 0;
1767         cntrs->RxP16HdrEgrOvflCnt = 0;
1768         cntrs->IBStatusChangeCnt =
1769                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBStatusChangeCnt));
1770         cntrs->IBLinkErrRecoveryCnt =
1771                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt));
1772         cntrs->IBLinkDownedCnt =
1773                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkDownedCnt));
1774         cntrs->IBSymbolErrCnt =
1775                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBSymbolErrCnt));
1776         cntrs->RxVL15DroppedPktCnt = 0;
1777         cntrs->RxOtherLocalPhyErrCnt = 0;
1778         cntrs->PcieRetryBufDiagQwordCnt = 0;
1779         cntrs->ExcessBufferOvflCnt = dd->ipath_overrun_thresh_errs;
1780         cntrs->LocalLinkIntegrityErrCnt =
1781                 (dd->ipath_flags & IPATH_GPIO_ERRINTRS) ?
1782                 dd->ipath_lli_errs : dd->ipath_lli_errors;
1783         cntrs->RxVlErrCnt = 0;
1784         cntrs->RxDlidFltrCnt = 0;
1785 }
1786
1787 /**
1788  * ipath_init_iba6110_funcs - set up the chip-specific function pointers
1789  * @dd: the infinipath device
1790  *
1791  * This is global, and is called directly at init to set up the
1792  * chip-specific function pointers for later use.
1793  */
1794 void ipath_init_iba6110_funcs(struct ipath_devdata *dd)
1795 {
1796         dd->ipath_f_intrsetup = ipath_ht_intconfig;
1797         dd->ipath_f_bus = ipath_setup_ht_config;
1798         dd->ipath_f_reset = ipath_setup_ht_reset;
1799         dd->ipath_f_get_boardname = ipath_ht_boardname;
1800         dd->ipath_f_init_hwerrors = ipath_ht_init_hwerrors;
1801         dd->ipath_f_early_init = ipath_ht_early_init;
1802         dd->ipath_f_handle_hwerrors = ipath_ht_handle_hwerrors;
1803         dd->ipath_f_quiet_serdes = ipath_ht_quiet_serdes;
1804         dd->ipath_f_bringup_serdes = ipath_ht_bringup_serdes;
1805         dd->ipath_f_clear_tids = ipath_ht_clear_tids;
1806         dd->ipath_f_put_tid = ipath_ht_put_tid;
1807         dd->ipath_f_cleanup = ipath_setup_ht_cleanup;
1808         dd->ipath_f_setextled = ipath_setup_ht_setextled;
1809         dd->ipath_f_get_base_info = ipath_ht_get_base_info;
1810         dd->ipath_f_free_irq = ipath_ht_free_irq;
1811         dd->ipath_f_config_ports = ipath_ht_config_ports;
1812         dd->ipath_f_read_counters = ipath_ht_read_counters;
1813
1814         /*
1815          * initialize chip-specific variables
1816          */
1817         dd->ipath_f_tidtemplate = ipath_ht_tidtemplate;
1818
1819         /*
1820          * setup the register offsets, since they are different for each
1821          * chip
1822          */
1823         dd->ipath_kregs = &ipath_ht_kregs;
1824         dd->ipath_cregs = &ipath_ht_cregs;
1825
1826         /*
1827          * do very early init that is needed before ipath_f_bus is
1828          * called
1829          */
1830         ipath_init_ht_variables(dd);
1831 }