git.oblomov.eu Git - linux-2.6/blob - drivers/infiniband/hw/ipath/ipath_iba6120.c

   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  * This file contains all of the code that is specific to the
  35  * InfiniPath PCIe chip.
  36  */
  37
  38 #include <linux/interrupt.h>
  39 #include <linux/pci.h>
  40 #include <linux/delay.h>
  41
  42
  43 #include "ipath_kernel.h"
  44 #include "ipath_registers.h"
  45
  46 static void ipath_setup_pe_setextled(struct ipath_devdata *, u64, u64);
  47
  48 /*
  49  * This file contains all the chip-specific register information and
  50  * access functions for the QLogic InfiniPath PCI-Express chip.
  51  *
  52  * This lists the InfiniPath registers, in the actual chip layout.
  53  * This structure should never be directly accessed.
  54  */
  55 struct _infinipath_do_not_use_kernel_regs {
  56         unsigned long long Revision;
  57         unsigned long long Control;
  58         unsigned long long PageAlign;
  59         unsigned long long PortCnt;
  60         unsigned long long DebugPortSelect;
  61         unsigned long long Reserved0;
  62         unsigned long long SendRegBase;
  63         unsigned long long UserRegBase;
  64         unsigned long long CounterRegBase;
  65         unsigned long long Scratch;
  66         unsigned long long Reserved1;
  67         unsigned long long Reserved2;
  68         unsigned long long IntBlocked;
  69         unsigned long long IntMask;
  70         unsigned long long IntStatus;
  71         unsigned long long IntClear;
  72         unsigned long long ErrorMask;
  73         unsigned long long ErrorStatus;
  74         unsigned long long ErrorClear;
  75         unsigned long long HwErrMask;
  76         unsigned long long HwErrStatus;
  77         unsigned long long HwErrClear;
  78         unsigned long long HwDiagCtrl;
  79         unsigned long long MDIO;
  80         unsigned long long IBCStatus;
  81         unsigned long long IBCCtrl;
  82         unsigned long long ExtStatus;
  83         unsigned long long ExtCtrl;
  84         unsigned long long GPIOOut;
  85         unsigned long long GPIOMask;
  86         unsigned long long GPIOStatus;
  87         unsigned long long GPIOClear;
  88         unsigned long long RcvCtrl;
  89         unsigned long long RcvBTHQP;
  90         unsigned long long RcvHdrSize;
  91         unsigned long long RcvHdrCnt;
  92         unsigned long long RcvHdrEntSize;
  93         unsigned long long RcvTIDBase;
  94         unsigned long long RcvTIDCnt;
  95         unsigned long long RcvEgrBase;
  96         unsigned long long RcvEgrCnt;
  97         unsigned long long RcvBufBase;
  98         unsigned long long RcvBufSize;
  99         unsigned long long RxIntMemBase;
 100         unsigned long long RxIntMemSize;
 101         unsigned long long RcvPartitionKey;
 102         unsigned long long Reserved3;
 103         unsigned long long RcvPktLEDCnt;
 104         unsigned long long Reserved4[8];
 105         unsigned long long SendCtrl;
 106         unsigned long long SendPIOBufBase;
 107         unsigned long long SendPIOSize;
 108         unsigned long long SendPIOBufCnt;
 109         unsigned long long SendPIOAvailAddr;
 110         unsigned long long TxIntMemBase;
 111         unsigned long long TxIntMemSize;
 112         unsigned long long Reserved5;
 113         unsigned long long PCIeRBufTestReg0;
 114         unsigned long long PCIeRBufTestReg1;
 115         unsigned long long Reserved51[6];
 116         unsigned long long SendBufferError;
 117         unsigned long long SendBufferErrorCONT1;
 118         unsigned long long Reserved6SBE[6];
 119         unsigned long long RcvHdrAddr0;
 120         unsigned long long RcvHdrAddr1;
 121         unsigned long long RcvHdrAddr2;
 122         unsigned long long RcvHdrAddr3;
 123         unsigned long long RcvHdrAddr4;
 124         unsigned long long Reserved7RHA[11];
 125         unsigned long long RcvHdrTailAddr0;
 126         unsigned long long RcvHdrTailAddr1;
 127         unsigned long long RcvHdrTailAddr2;
 128         unsigned long long RcvHdrTailAddr3;
 129         unsigned long long RcvHdrTailAddr4;
 130         unsigned long long Reserved8RHTA[11];
 131         unsigned long long Reserved9SW[8];
 132         unsigned long long SerdesConfig0;
 133         unsigned long long SerdesConfig1;
 134         unsigned long long SerdesStatus;
 135         unsigned long long XGXSConfig;
 136         unsigned long long IBPLLCfg;
 137         unsigned long long Reserved10SW2[3];
 138         unsigned long long PCIEQ0SerdesConfig0;
 139         unsigned long long PCIEQ0SerdesConfig1;
 140         unsigned long long PCIEQ0SerdesStatus;
 141         unsigned long long Reserved11;
 142         unsigned long long PCIEQ1SerdesConfig0;
 143         unsigned long long PCIEQ1SerdesConfig1;
 144         unsigned long long PCIEQ1SerdesStatus;
 145         unsigned long long Reserved12;
 146 };
 147
 148 struct _infinipath_do_not_use_counters {
 149         __u64 LBIntCnt;
 150         __u64 LBFlowStallCnt;
 151         __u64 Reserved1;
 152         __u64 TxUnsupVLErrCnt;
 153         __u64 TxDataPktCnt;
 154         __u64 TxFlowPktCnt;
 155         __u64 TxDwordCnt;
 156         __u64 TxLenErrCnt;
 157         __u64 TxMaxMinLenErrCnt;
 158         __u64 TxUnderrunCnt;
 159         __u64 TxFlowStallCnt;
 160         __u64 TxDroppedPktCnt;
 161         __u64 RxDroppedPktCnt;
 162         __u64 RxDataPktCnt;
 163         __u64 RxFlowPktCnt;
 164         __u64 RxDwordCnt;
 165         __u64 RxLenErrCnt;
 166         __u64 RxMaxMinLenErrCnt;
 167         __u64 RxICRCErrCnt;
 168         __u64 RxVCRCErrCnt;
 169         __u64 RxFlowCtrlErrCnt;
 170         __u64 RxBadFormatCnt;
 171         __u64 RxLinkProblemCnt;
 172         __u64 RxEBPCnt;
 173         __u64 RxLPCRCErrCnt;
 174         __u64 RxBufOvflCnt;
 175         __u64 RxTIDFullErrCnt;
 176         __u64 RxTIDValidErrCnt;
 177         __u64 RxPKeyMismatchCnt;
 178         __u64 RxP0HdrEgrOvflCnt;
 179         __u64 RxP1HdrEgrOvflCnt;
 180         __u64 RxP2HdrEgrOvflCnt;
 181         __u64 RxP3HdrEgrOvflCnt;
 182         __u64 RxP4HdrEgrOvflCnt;
 183         __u64 RxP5HdrEgrOvflCnt;
 184         __u64 RxP6HdrEgrOvflCnt;
 185         __u64 RxP7HdrEgrOvflCnt;
 186         __u64 RxP8HdrEgrOvflCnt;
 187         __u64 Reserved6;
 188         __u64 Reserved7;
 189         __u64 IBStatusChangeCnt;
 190         __u64 IBLinkErrRecoveryCnt;
 191         __u64 IBLinkDownedCnt;
 192         __u64 IBSymbolErrCnt;
 193 };
 194
 195 #define IPATH_KREG_OFFSET(field) (offsetof( \
 196         struct _infinipath_do_not_use_kernel_regs, field) / sizeof(u64))
 197 #define IPATH_CREG_OFFSET(field) (offsetof( \
 198         struct _infinipath_do_not_use_counters, field) / sizeof(u64))
 199
 200 static const struct ipath_kregs ipath_pe_kregs = {
 201         .kr_control = IPATH_KREG_OFFSET(Control),
 202         .kr_counterregbase = IPATH_KREG_OFFSET(CounterRegBase),
 203         .kr_debugportselect = IPATH_KREG_OFFSET(DebugPortSelect),
 204         .kr_errorclear = IPATH_KREG_OFFSET(ErrorClear),
 205         .kr_errormask = IPATH_KREG_OFFSET(ErrorMask),
 206         .kr_errorstatus = IPATH_KREG_OFFSET(ErrorStatus),
 207         .kr_extctrl = IPATH_KREG_OFFSET(ExtCtrl),
 208         .kr_extstatus = IPATH_KREG_OFFSET(ExtStatus),
 209         .kr_gpio_clear = IPATH_KREG_OFFSET(GPIOClear),
 210         .kr_gpio_mask = IPATH_KREG_OFFSET(GPIOMask),
 211         .kr_gpio_out = IPATH_KREG_OFFSET(GPIOOut),
 212         .kr_gpio_status = IPATH_KREG_OFFSET(GPIOStatus),
 213         .kr_hwdiagctrl = IPATH_KREG_OFFSET(HwDiagCtrl),
 214         .kr_hwerrclear = IPATH_KREG_OFFSET(HwErrClear),
 215         .kr_hwerrmask = IPATH_KREG_OFFSET(HwErrMask),
 216         .kr_hwerrstatus = IPATH_KREG_OFFSET(HwErrStatus),
 217         .kr_ibcctrl = IPATH_KREG_OFFSET(IBCCtrl),
 218         .kr_ibcstatus = IPATH_KREG_OFFSET(IBCStatus),
 219         .kr_intblocked = IPATH_KREG_OFFSET(IntBlocked),
 220         .kr_intclear = IPATH_KREG_OFFSET(IntClear),
 221         .kr_intmask = IPATH_KREG_OFFSET(IntMask),
 222         .kr_intstatus = IPATH_KREG_OFFSET(IntStatus),
 223         .kr_mdio = IPATH_KREG_OFFSET(MDIO),
 224         .kr_pagealign = IPATH_KREG_OFFSET(PageAlign),
 225         .kr_partitionkey = IPATH_KREG_OFFSET(RcvPartitionKey),
 226         .kr_portcnt = IPATH_KREG_OFFSET(PortCnt),
 227         .kr_rcvbthqp = IPATH_KREG_OFFSET(RcvBTHQP),
 228         .kr_rcvbufbase = IPATH_KREG_OFFSET(RcvBufBase),
 229         .kr_rcvbufsize = IPATH_KREG_OFFSET(RcvBufSize),
 230         .kr_rcvctrl = IPATH_KREG_OFFSET(RcvCtrl),
 231         .kr_rcvegrbase = IPATH_KREG_OFFSET(RcvEgrBase),
 232         .kr_rcvegrcnt = IPATH_KREG_OFFSET(RcvEgrCnt),
 233         .kr_rcvhdrcnt = IPATH_KREG_OFFSET(RcvHdrCnt),
 234         .kr_rcvhdrentsize = IPATH_KREG_OFFSET(RcvHdrEntSize),
 235         .kr_rcvhdrsize = IPATH_KREG_OFFSET(RcvHdrSize),
 236         .kr_rcvintmembase = IPATH_KREG_OFFSET(RxIntMemBase),
 237         .kr_rcvintmemsize = IPATH_KREG_OFFSET(RxIntMemSize),
 238         .kr_rcvtidbase = IPATH_KREG_OFFSET(RcvTIDBase),
 239         .kr_rcvtidcnt = IPATH_KREG_OFFSET(RcvTIDCnt),
 240         .kr_revision = IPATH_KREG_OFFSET(Revision),
 241         .kr_scratch = IPATH_KREG_OFFSET(Scratch),
 242         .kr_sendbuffererror = IPATH_KREG_OFFSET(SendBufferError),
 243         .kr_sendctrl = IPATH_KREG_OFFSET(SendCtrl),
 244         .kr_sendpioavailaddr = IPATH_KREG_OFFSET(SendPIOAvailAddr),
 245         .kr_sendpiobufbase = IPATH_KREG_OFFSET(SendPIOBufBase),
 246         .kr_sendpiobufcnt = IPATH_KREG_OFFSET(SendPIOBufCnt),
 247         .kr_sendpiosize = IPATH_KREG_OFFSET(SendPIOSize),
 248         .kr_sendregbase = IPATH_KREG_OFFSET(SendRegBase),
 249         .kr_txintmembase = IPATH_KREG_OFFSET(TxIntMemBase),
 250         .kr_txintmemsize = IPATH_KREG_OFFSET(TxIntMemSize),
 251         .kr_userregbase = IPATH_KREG_OFFSET(UserRegBase),
 252         .kr_serdesconfig0 = IPATH_KREG_OFFSET(SerdesConfig0),
 253         .kr_serdesconfig1 = IPATH_KREG_OFFSET(SerdesConfig1),
 254         .kr_serdesstatus = IPATH_KREG_OFFSET(SerdesStatus),
 255         .kr_xgxsconfig = IPATH_KREG_OFFSET(XGXSConfig),
 256         .kr_ibpllcfg = IPATH_KREG_OFFSET(IBPLLCfg),
 257
 258         /*
 259          * These should not be used directly via ipath_write_kreg64(),
 260          * use them with ipath_write_kreg64_port(),
 261          */
 262         .kr_rcvhdraddr = IPATH_KREG_OFFSET(RcvHdrAddr0),
 263         .kr_rcvhdrtailaddr = IPATH_KREG_OFFSET(RcvHdrTailAddr0),
 264
 265         /* The rcvpktled register controls one of the debug port signals, so
 266          * a packet activity LED can be connected to it. */
 267         .kr_rcvpktledcnt = IPATH_KREG_OFFSET(RcvPktLEDCnt),
 268         .kr_pcierbuftestreg0 = IPATH_KREG_OFFSET(PCIeRBufTestReg0),
 269         .kr_pcierbuftestreg1 = IPATH_KREG_OFFSET(PCIeRBufTestReg1),
 270         .kr_pcieq0serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig0),
 271         .kr_pcieq0serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ0SerdesConfig1),
 272         .kr_pcieq0serdesstatus = IPATH_KREG_OFFSET(PCIEQ0SerdesStatus),
 273         .kr_pcieq1serdesconfig0 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig0),
 274         .kr_pcieq1serdesconfig1 = IPATH_KREG_OFFSET(PCIEQ1SerdesConfig1),
 275         .kr_pcieq1serdesstatus = IPATH_KREG_OFFSET(PCIEQ1SerdesStatus)
 276 };
 277
 278 static const struct ipath_cregs ipath_pe_cregs = {
 279         .cr_badformatcnt = IPATH_CREG_OFFSET(RxBadFormatCnt),
 280         .cr_erricrccnt = IPATH_CREG_OFFSET(RxICRCErrCnt),
 281         .cr_errlinkcnt = IPATH_CREG_OFFSET(RxLinkProblemCnt),
 282         .cr_errlpcrccnt = IPATH_CREG_OFFSET(RxLPCRCErrCnt),
 283         .cr_errpkey = IPATH_CREG_OFFSET(RxPKeyMismatchCnt),
 284         .cr_errrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowCtrlErrCnt),
 285         .cr_err_rlencnt = IPATH_CREG_OFFSET(RxLenErrCnt),
 286         .cr_errslencnt = IPATH_CREG_OFFSET(TxLenErrCnt),
 287         .cr_errtidfull = IPATH_CREG_OFFSET(RxTIDFullErrCnt),
 288         .cr_errtidvalid = IPATH_CREG_OFFSET(RxTIDValidErrCnt),
 289         .cr_errvcrccnt = IPATH_CREG_OFFSET(RxVCRCErrCnt),
 290         .cr_ibstatuschange = IPATH_CREG_OFFSET(IBStatusChangeCnt),
 291         .cr_intcnt = IPATH_CREG_OFFSET(LBIntCnt),
 292         .cr_invalidrlencnt = IPATH_CREG_OFFSET(RxMaxMinLenErrCnt),
 293         .cr_invalidslencnt = IPATH_CREG_OFFSET(TxMaxMinLenErrCnt),
 294         .cr_lbflowstallcnt = IPATH_CREG_OFFSET(LBFlowStallCnt),
 295         .cr_pktrcvcnt = IPATH_CREG_OFFSET(RxDataPktCnt),
 296         .cr_pktrcvflowctrlcnt = IPATH_CREG_OFFSET(RxFlowPktCnt),
 297         .cr_pktsendcnt = IPATH_CREG_OFFSET(TxDataPktCnt),
 298         .cr_pktsendflowcnt = IPATH_CREG_OFFSET(TxFlowPktCnt),
 299         .cr_portovflcnt = IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt),
 300         .cr_rcvebpcnt = IPATH_CREG_OFFSET(RxEBPCnt),
 301         .cr_rcvovflcnt = IPATH_CREG_OFFSET(RxBufOvflCnt),
 302         .cr_senddropped = IPATH_CREG_OFFSET(TxDroppedPktCnt),
 303         .cr_sendstallcnt = IPATH_CREG_OFFSET(TxFlowStallCnt),
 304         .cr_sendunderruncnt = IPATH_CREG_OFFSET(TxUnderrunCnt),
 305         .cr_wordrcvcnt = IPATH_CREG_OFFSET(RxDwordCnt),
 306         .cr_wordsendcnt = IPATH_CREG_OFFSET(TxDwordCnt),
 307         .cr_unsupvlcnt = IPATH_CREG_OFFSET(TxUnsupVLErrCnt),
 308         .cr_rxdroppktcnt = IPATH_CREG_OFFSET(RxDroppedPktCnt),
 309         .cr_iblinkerrrecovcnt = IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt),
 310         .cr_iblinkdowncnt = IPATH_CREG_OFFSET(IBLinkDownedCnt),
 311         .cr_ibsymbolerrcnt = IPATH_CREG_OFFSET(IBSymbolErrCnt)
 312 };
 313
 314 /* kr_intstatus, kr_intclear, kr_intmask bits */
 315 #define INFINIPATH_I_RCVURG_MASK ((1U<<5)-1)
 316 #define INFINIPATH_I_RCVAVAIL_MASK ((1U<<5)-1)
 317
 318 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 319 #define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK  0x000000000000003fULL
 320 #define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
 321 #define INFINIPATH_HWE_PCIEPOISONEDTLP      0x0000000010000000ULL
 322 #define INFINIPATH_HWE_PCIECPLTIMEOUT       0x0000000020000000ULL
 323 #define INFINIPATH_HWE_PCIEBUSPARITYXTLH    0x0000000040000000ULL
 324 #define INFINIPATH_HWE_PCIEBUSPARITYXADM    0x0000000080000000ULL
 325 #define INFINIPATH_HWE_PCIEBUSPARITYRADM    0x0000000100000000ULL
 326 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 327 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 328 #define INFINIPATH_HWE_PCIE1PLLFAILED       0x0400000000000000ULL
 329 #define INFINIPATH_HWE_PCIE0PLLFAILED       0x0800000000000000ULL
 330 #define INFINIPATH_HWE_SERDESPLLFAILED      0x1000000000000000ULL
 331
 332 #define IBA6120_IBCS_LINKTRAININGSTATE_MASK 0xf
 333 #define IBA6120_IBCS_LINKSTATE_SHIFT 4
 334
 335 /* kr_extstatus bits */
 336 #define INFINIPATH_EXTS_FREQSEL 0x2
 337 #define INFINIPATH_EXTS_SERDESSEL 0x4
 338 #define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 339 #define INFINIPATH_EXTS_MEMBIST_FOUND       0x0000000000008000
 340
 341 #define _IPATH_GPIO_SDA_NUM 1
 342 #define _IPATH_GPIO_SCL_NUM 0
 343
 344 #define IPATH_GPIO_SDA (1ULL << \
 345         (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 346 #define IPATH_GPIO_SCL (1ULL << \
 347         (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 348
 349 #define INFINIPATH_R_INTRAVAIL_SHIFT 16
 350 #define INFINIPATH_R_TAILUPD_SHIFT 31
 351
 352 /* 6120 specific hardware errors... */
 353 static const struct ipath_hwerror_msgs ipath_6120_hwerror_msgs[] = {
 354         INFINIPATH_HWE_MSG(PCIEPOISONEDTLP, "PCIe Poisoned TLP"),
 355         INFINIPATH_HWE_MSG(PCIECPLTIMEOUT, "PCIe completion timeout"),
 356         /*
 357          * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
 358          * parity or memory parity error failures, because most likely we
 359          * won't be able to talk to the core of the chip.  Nonetheless, we
 360          * might see them, if they are in parts of the PCIe core that aren't
 361          * essential.
 362          */
 363         INFINIPATH_HWE_MSG(PCIE1PLLFAILED, "PCIePLL1"),
 364         INFINIPATH_HWE_MSG(PCIE0PLLFAILED, "PCIePLL0"),
 365         INFINIPATH_HWE_MSG(PCIEBUSPARITYXTLH, "PCIe XTLH core parity"),
 366         INFINIPATH_HWE_MSG(PCIEBUSPARITYXADM, "PCIe ADM TX core parity"),
 367         INFINIPATH_HWE_MSG(PCIEBUSPARITYRADM, "PCIe ADM RX core parity"),
 368         INFINIPATH_HWE_MSG(RXDSYNCMEMPARITYERR, "Rx Dsync"),
 369         INFINIPATH_HWE_MSG(SERDESPLLFAILED, "SerDes PLL"),
 370 };
 371
 372 #define TXE_PIO_PARITY ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF | \
 373                         INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC) \
 374                         << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)
 375
 376 static void ipath_pe_put_tid_2(struct ipath_devdata *, u64 __iomem *,
 377                                u32, unsigned long);
 378
 379 /*
 380  * On platforms using this chip, and not having ordered WC stores, we
 381  * can get TXE parity errors due to speculative reads to the PIO buffers,
 382  * and this, due to a chip bug can result in (many) false parity error
 383  * reports.  So it's a debug print on those, and an info print on systems
 384  * where the speculative reads don't occur.
 385  */
 386 static void ipath_pe_txe_recover(struct ipath_devdata *dd)
 387 {
 388         if (ipath_unordered_wc())
 389                 ipath_dbg("Recovering from TXE PIO parity error\n");
 390         else {
 391                 ++ipath_stats.sps_txeparity;
 392                 dev_info(&dd->pcidev->dev,
 393                         "Recovering from TXE PIO parity error\n");
 394         }
 395 }
 396
 397
 398 /**
 399  * ipath_pe_handle_hwerrors - display hardware errors.
 400  * @dd: the infinipath device
 401  * @msg: the output buffer
 402  * @msgl: the size of the output buffer
 403  *
 404  * Use same msg buffer as regular errors to avoid excessive stack
 405  * use.  Most hardware errors are catastrophic, but for right now,
 406  * we'll print them and continue.  We reuse the same message buffer as
 407  * ipath_handle_errors() to avoid excessive stack usage.
 408  */
 409 static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 410                                      size_t msgl)
 411 {
 412         ipath_err_t hwerrs;
 413         u32 bits, ctrl;
 414         int isfatal = 0;
 415         char bitsmsg[64];
 416         int log_idx;
 417
 418         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 419         if (!hwerrs) {
 420                 /*
 421                  * better than printing cofusing messages
 422                  * This seems to be related to clearing the crc error, or
 423                  * the pll error during init.
 424                  */
 425                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 426                 return;
 427         } else if (hwerrs == ~0ULL) {
 428                 ipath_dev_err(dd, "Read of hardware error status failed "
 429                               "(all bits set); ignoring\n");
 430                 return;
 431         }
 432         ipath_stats.sps_hwerrs++;
 433
 434         /* Always clear the error status register, except MEMBISTFAIL,
 435          * regardless of whether we continue or stop using the chip.
 436          * We want that set so we know it failed, even across driver reload.
 437          * We'll still ignore it in the hwerrmask.  We do this partly for
 438          * diagnostics, but also for support */
 439         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 440                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 441
 442         hwerrs &= dd->ipath_hwerrmask;
 443
 444         /* We log some errors to EEPROM, check if we have any of those. */
 445         for (log_idx = 0; log_idx < IPATH_EEP_LOG_CNT; ++log_idx)
 446                 if (hwerrs & dd->ipath_eep_st_masks[log_idx].hwerrs_to_log)
 447                         ipath_inc_eeprom_err(dd, log_idx, 1);
 448
 449         /*
 450          * make sure we get this much out, unless told to be quiet,
 451          * or it's occurred within the last 5 seconds
 452          */
 453         if ((hwerrs & ~(dd->ipath_lasthwerror |
 454                         ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF |
 455                           INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC)
 456                          << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT))) ||
 457             (ipath_debug & __IPATH_VERBDBG))
 458                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 459                          "(cleared)\n", (unsigned long long) hwerrs);
 460         dd->ipath_lasthwerror |= hwerrs;
 461
 462         if (hwerrs & ~dd->ipath_hwe_bitsextant)
 463                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 464                               "%llx set\n", (unsigned long long)
 465                               (hwerrs & ~dd->ipath_hwe_bitsextant));
 466
 467         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 468         if (ctrl & INFINIPATH_C_FREEZEMODE) {
 469                 /*
 470                  * parity errors in send memory are recoverable,
 471                  * just cancel the send (if indicated in * sendbuffererror),
 472                  * count the occurrence, unfreeze (if no other handled
 473                  * hardware error bits are set), and continue. They can
 474                  * occur if a processor speculative read is done to the PIO
 475                  * buffer while we are sending a packet, for example.
 476                  */
 477                 if (hwerrs & TXE_PIO_PARITY) {
 478                         ipath_pe_txe_recover(dd);
 479                         hwerrs &= ~TXE_PIO_PARITY;
 480                 }
 481                 if (!hwerrs) {
 482                         static u32 freeze_cnt;
 483
 484                         freeze_cnt++;
 485                         ipath_dbg("Clearing freezemode on ignored or recovered "
 486                                   "hardware error (%u)\n", freeze_cnt);
 487                         ipath_clear_freeze(dd);
 488                 }
 489         }
 490
 491         *msg = '\0';
 492
 493         if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
 494                 strlcat(msg, "[Memory BIST test failed, InfiniPath hardware unusable]",
 495                         msgl);
 496                 /* ignore from now on, so disable until driver reloaded */
 497                 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 498                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
 499                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 500                                  dd->ipath_hwerrmask);
 501         }
 502
 503         ipath_format_hwerrors(hwerrs,
 504                               ipath_6120_hwerror_msgs,
 505                               sizeof(ipath_6120_hwerror_msgs)/
 506                               sizeof(ipath_6120_hwerror_msgs[0]),
 507                               msg, msgl);
 508
 509         if (hwerrs & (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK
 510                       << INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT)) {
 511                 bits = (u32) ((hwerrs >>
 512                                INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) &
 513                               INFINIPATH_HWE_PCIEMEMPARITYERR_MASK);
 514                 snprintf(bitsmsg, sizeof bitsmsg,
 515                          "[PCIe Mem Parity Errs %x] ", bits);
 516                 strlcat(msg, bitsmsg, msgl);
 517         }
 518
 519 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |        \
 520                          INFINIPATH_HWE_COREPLL_RFSLIP )
 521
 522         if (hwerrs & _IPATH_PLL_FAIL) {
 523                 snprintf(bitsmsg, sizeof bitsmsg,
 524                          "[PLL failed (%llx), InfiniPath hardware unusable]",
 525                          (unsigned long long) hwerrs & _IPATH_PLL_FAIL);
 526                 strlcat(msg, bitsmsg, msgl);
 527                 /* ignore from now on, so disable until driver reloaded */
 528                 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
 529                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 530                                  dd->ipath_hwerrmask);
 531         }
 532
 533         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
 534                 /*
 535                  * If it occurs, it is left masked since the external
 536                  * interface is unused
 537                  */
 538                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 539                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 540                                  dd->ipath_hwerrmask);
 541         }
 542
 543         if (*msg)
 544                 ipath_dev_err(dd, "%s hardware error\n", msg);
 545         if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg) {
 546                 /*
 547                  * for /sys status file ; if no trailing } is copied, we'll
 548                  * know it was truncated.
 549                  */
 550                 snprintf(dd->ipath_freezemsg, dd->ipath_freezelen,
 551                          "{%s}", msg);
 552         }
 553 }
 554
 555 /**
 556  * ipath_pe_boardname - fill in the board name
 557  * @dd: the infinipath device
 558  * @name: the output buffer
 559  * @namelen: the size of the output buffer
 560  *
 561  * info is based on the board revision register
 562  */
 563 static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
 564                               size_t namelen)
 565 {
 566         char *n = NULL;
 567         u8 boardrev = dd->ipath_boardrev;
 568         int ret;
 569
 570         switch (boardrev) {
 571         case 0:
 572                 n = "InfiniPath_Emulation";
 573                 break;
 574         case 1:
 575                 n = "InfiniPath_QLE7140-Bringup";
 576                 break;
 577         case 2:
 578                 n = "InfiniPath_QLE7140";
 579                 break;
 580         case 3:
 581                 n = "InfiniPath_QMI7140";
 582                 break;
 583         case 4:
 584                 n = "InfiniPath_QEM7140";
 585                 break;
 586         case 5:
 587                 n = "InfiniPath_QMH7140";
 588                 break;
 589         case 6:
 590                 n = "InfiniPath_QLE7142";
 591                 break;
 592         default:
 593                 ipath_dev_err(dd,
 594                               "Don't yet know about board with ID %u\n",
 595                               boardrev);
 596                 snprintf(name, namelen, "Unknown_InfiniPath_PCIe_%u",
 597                          boardrev);
 598                 break;
 599         }
 600         if (n)
 601                 snprintf(name, namelen, "%s", n);
 602
 603         if (dd->ipath_majrev != 4 || !dd->ipath_minrev || dd->ipath_minrev>2) {
 604                 ipath_dev_err(dd, "Unsupported InfiniPath hardware revision %u.%u!\n",
 605                               dd->ipath_majrev, dd->ipath_minrev);
 606                 ret = 1;
 607         } else {
 608                 ret = 0;
 609                 if (dd->ipath_minrev >= 2)
 610                         dd->ipath_f_put_tid = ipath_pe_put_tid_2;
 611         }
 612
 613
 614         /*
 615          * set here, not in ipath_init_*_funcs because we have to do
 616          * it after we can read chip registers.
 617          */
 618         dd->ipath_ureg_align =
 619                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
 620
 621         return ret;
 622 }
 623
 624 /**
 625  * ipath_pe_init_hwerrors - enable hardware errors
 626  * @dd: the infinipath device
 627  *
 628  * now that we have finished initializing everything that might reasonably
 629  * cause a hardware error, and cleared those errors bits as they occur,
 630  * we can enable hardware errors in the mask (potentially enabling
 631  * freeze mode), and enable hardware errors as errors (along with
 632  * everything else) in errormask
 633  */
 634 static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
 635 {
 636         ipath_err_t val;
 637         u64 extsval;
 638
 639         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
 640
 641         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
 642                 ipath_dev_err(dd, "MemBIST did not complete!\n");
 643         if (extsval & INFINIPATH_EXTS_MEMBIST_FOUND)
 644                 ipath_dbg("MemBIST corrected\n");
 645
 646         val = ~0ULL;    /* barring bugs, all hwerrors become interrupts, */
 647
 648         if (!dd->ipath_boardrev)        // no PLL for Emulator
 649                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 650
 651         if (dd->ipath_minrev < 2) {
 652                 /* workaround bug 9460 in internal interface bus parity
 653                  * checking. Fixed (HW bug 9490) in Rev2.
 654                  */
 655                 val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
 656         }
 657         dd->ipath_hwerrmask = val;
 658 }
 659
 660 /**
 661  * ipath_pe_bringup_serdes - bring up the serdes
 662  * @dd: the infinipath device
 663  */
 664 static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
 665 {
 666         u64 val, config1, prev_val;
 667         int ret = 0;
 668
 669         ipath_dbg("Trying to bringup serdes\n");
 670
 671         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
 672             INFINIPATH_HWE_SERDESPLLFAILED) {
 673                 ipath_dbg("At start, serdes PLL failed bit set "
 674                           "in hwerrstatus, clearing and continuing\n");
 675                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 676                                  INFINIPATH_HWE_SERDESPLLFAILED);
 677         }
 678
 679         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 680         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
 681
 682         ipath_cdbg(VERBOSE, "SerDes status config0=%llx config1=%llx, "
 683                    "xgxsconfig %llx\n", (unsigned long long) val,
 684                    (unsigned long long) config1, (unsigned long long)
 685                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 686
 687         /*
 688          * Force reset on, also set rxdetect enable.  Must do before reading
 689          * serdesstatus at least for simulation, or some of the bits in
 690          * serdes status will come back as undefined and cause simulation
 691          * failures
 692          */
 693         val |= INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RXDETECT_EN
 694                 | INFINIPATH_SERDC0_L1PWR_DN;
 695         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 696         /* be sure chip saw it */
 697         ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 698         udelay(5);              /* need pll reset set at least for a bit */
 699         /*
 700          * after PLL is reset, set the per-lane Resets and TxIdle and
 701          * clear the PLL reset and rxdetect (to get falling edge).
 702          * Leave L1PWR bits set (permanently)
 703          */
 704         val &= ~(INFINIPATH_SERDC0_RXDETECT_EN | INFINIPATH_SERDC0_RESET_PLL
 705                  | INFINIPATH_SERDC0_L1PWR_DN);
 706         val |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
 707         ipath_cdbg(VERBOSE, "Clearing pll reset and setting lane resets "
 708                    "and txidle (%llx)\n", (unsigned long long) val);
 709         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 710         /* be sure chip saw it */
 711         ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 712         /* need PLL reset clear for at least 11 usec before lane
 713          * resets cleared; give it a few more to be sure */
 714         udelay(15);
 715         val &= ~(INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE);
 716
 717         ipath_cdbg(VERBOSE, "Clearing lane resets and txidle "
 718                    "(writing %llx)\n", (unsigned long long) val);
 719         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 720         /* be sure chip saw it */
 721         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 722
 723         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
 724         prev_val = val;
 725         if (val & INFINIPATH_XGXS_RESET)
 726                 val &= ~INFINIPATH_XGXS_RESET;
 727         if (((val >> INFINIPATH_XGXS_RX_POL_SHIFT) &
 728              INFINIPATH_XGXS_RX_POL_MASK) != dd->ipath_rx_pol_inv ) {
 729                 /* need to compensate for Tx inversion in partner */
 730                 val &= ~(INFINIPATH_XGXS_RX_POL_MASK <<
 731                          INFINIPATH_XGXS_RX_POL_SHIFT);
 732                 val |= dd->ipath_rx_pol_inv <<
 733                         INFINIPATH_XGXS_RX_POL_SHIFT;
 734         }
 735         if (val != prev_val)
 736                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
 737
 738         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 739
 740         /* clear current and de-emphasis bits */
 741         config1 &= ~0x0ffffffff00ULL;
 742         /* set current to 20ma */
 743         config1 |= 0x00000000000ULL;
 744         /* set de-emphasis to -5.68dB */
 745         config1 |= 0x0cccc000000ULL;
 746         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
 747
 748         ipath_cdbg(VERBOSE, "done: SerDes status config0=%llx "
 749                    "config1=%llx, sstatus=%llx xgxs=%llx\n",
 750                    (unsigned long long) val, (unsigned long long) config1,
 751                    (unsigned long long)
 752                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
 753                    (unsigned long long)
 754                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 755
 756         return ret;
 757 }
 758
 759 /**
 760  * ipath_pe_quiet_serdes - set serdes to txidle
 761  * @dd: the infinipath device
 762  * Called when driver is being unloaded
 763  */
 764 static void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
 765 {
 766         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 767
 768         val |= INFINIPATH_SERDC0_TXIDLE;
 769         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
 770                   (unsigned long long) val);
 771         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 772 }
 773
 774 static int ipath_pe_intconfig(struct ipath_devdata *dd)
 775 {
 776         u32 chiprev;
 777
 778         /*
 779          * If the chip supports added error indication via GPIO pins,
 780          * enable interrupts on those bits so the interrupt routine
 781          * can count the events. Also set flag so interrupt routine
 782          * can know they are expected.
 783          */
 784         chiprev = dd->ipath_revision >> INFINIPATH_R_CHIPREVMINOR_SHIFT;
 785         if ((chiprev & INFINIPATH_R_CHIPREVMINOR_MASK) > 1) {
 786                 /* Rev2+ reports extra errors via internal GPIO pins */
 787                 dd->ipath_flags |= IPATH_GPIO_ERRINTRS;
 788                 dd->ipath_gpio_mask |= IPATH_GPIO_ERRINTR_MASK;
 789                 ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
 790                                  dd->ipath_gpio_mask);
 791         }
 792         return 0;
 793 }
 794
 795 /**
 796  * ipath_setup_pe_setextled - set the state of the two external LEDs
 797  * @dd: the infinipath device
 798  * @lst: the L state
 799  * @ltst: the LT state
 800
 801  * These LEDs indicate the physical and logical state of IB link.
 802  * For this chip (at least with recommended board pinouts), LED1
 803  * is Yellow (logical state) and LED2 is Green (physical state),
 804  *
 805  * Note:  We try to match the Mellanox HCA LED behavior as best
 806  * we can.  Green indicates physical link state is OK (something is
 807  * plugged in, and we can train).
 808  * Amber indicates the link is logically up (ACTIVE).
 809  * Mellanox further blinks the amber LED to indicate data packet
 810  * activity, but we have no hardware support for that, so it would
 811  * require waking up every 10-20 msecs and checking the counters
 812  * on the chip, and then turning the LED off if appropriate.  That's
 813  * visible overhead, so not something we will do.
 814  *
 815  */
 816 static void ipath_setup_pe_setextled(struct ipath_devdata *dd, u64 lst,
 817                                      u64 ltst)
 818 {
 819         u64 extctl;
 820         unsigned long flags = 0;
 821
 822         /* the diags use the LED to indicate diag info, so we leave
 823          * the external LED alone when the diags are running */
 824         if (ipath_diag_inuse)
 825                 return;
 826
 827         /* Allow override of LED display for, e.g. Locating system in rack */
 828         if (dd->ipath_led_override) {
 829                 ltst = (dd->ipath_led_override & IPATH_LED_PHYS)
 830                         ? INFINIPATH_IBCS_LT_STATE_LINKUP
 831                         : INFINIPATH_IBCS_LT_STATE_DISABLED;
 832                 lst = (dd->ipath_led_override & IPATH_LED_LOG)
 833                         ? INFINIPATH_IBCS_L_STATE_ACTIVE
 834                         : INFINIPATH_IBCS_L_STATE_DOWN;
 835         }
 836
 837         spin_lock_irqsave(&dd->ipath_gpio_lock, flags);
 838         extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
 839                                        INFINIPATH_EXTC_LED2PRIPORT_ON);
 840
 841         if (ltst & INFINIPATH_IBCS_LT_STATE_LINKUP)
 842                 extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
 843         if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
 844                 extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
 845         dd->ipath_extctrl = extctl;
 846         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
 847         spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);
 848 }
 849
 850 /**
 851  * ipath_setup_pe_cleanup - clean up any per-chip chip-specific stuff
 852  * @dd: the infinipath device
 853  *
 854  * This is called during driver unload.
 855  * We do the pci_disable_msi here, not in generic code, because it
 856  * isn't used for the HT chips. If we do end up needing pci_enable_msi
 857  * at some point in the future for HT, we'll move the call back
 858  * into the main init_one code.
 859  */
 860 static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
 861 {
 862         dd->ipath_msi_lo = 0;   /* just in case unload fails */
 863         pci_disable_msi(dd->pcidev);
 864 }
 865
 866 /**
 867  * ipath_setup_pe_config - setup PCIe config related stuff
 868  * @dd: the infinipath device
 869  * @pdev: the PCI device
 870  *
 871  * The pci_enable_msi() call will fail on systems with MSI quirks
 872  * such as those with AMD8131, even if the device of interest is not
 873  * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
 874  * late in 2.6.16).
 875  * All that can be done is to edit the kernel source to remove the quirk
 876  * check until that is fixed.
 877  * We do not need to call enable_msi() for our HyperTransport chip,
 878  * even though it uses MSI, and we want to avoid the quirk warning, so
 879  * So we call enable_msi only for PCIe.  If we do end up needing
 880  * pci_enable_msi at some point in the future for HT, we'll move the
 881  * call back into the main init_one code.
 882  * We save the msi lo and hi values, so we can restore them after
 883  * chip reset (the kernel PCI infrastructure doesn't yet handle that
 884  * correctly).
 885  */
 886 static int ipath_setup_pe_config(struct ipath_devdata *dd,
 887                                  struct pci_dev *pdev)
 888 {
 889         int pos, ret;
 890
 891         dd->ipath_msi_lo = 0;   /* used as a flag during reset processing */
 892         ret = pci_enable_msi(dd->pcidev);
 893         if (ret)
 894                 ipath_dev_err(dd, "pci_enable_msi failed: %d, "
 895                               "interrupts may not work\n", ret);
 896         /* continue even if it fails, we may still be OK... */
 897         dd->ipath_irq = pdev->irq;
 898
 899         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
 900                 u16 control;
 901                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
 902                                       &dd->ipath_msi_lo);
 903                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
 904                                       &dd->ipath_msi_hi);
 905                 pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
 906                                      &control);
 907                 /* now save the data (vector) info */
 908                 pci_read_config_word(dd->pcidev,
 909                                      pos + ((control & PCI_MSI_FLAGS_64BIT)
 910                                             ? 12 : 8),
 911                                      &dd->ipath_msi_data);
 912                 ipath_cdbg(VERBOSE, "Read msi data 0x%x from config offset "
 913                            "0x%x, control=0x%x\n", dd->ipath_msi_data,
 914                            pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
 915                            control);
 916                 /* we save the cachelinesize also, although it doesn't
 917                  * really matter */
 918                 pci_read_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
 919                                      &dd->ipath_pci_cacheline);
 920         } else
 921                 ipath_dev_err(dd, "Can't find MSI capability, "
 922                               "can't save MSI settings for reset\n");
 923         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP))) {
 924                 u16 linkstat;
 925                 pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
 926                                      &linkstat);
 927                 linkstat >>= 4;
 928                 linkstat &= 0x1f;
 929                 if (linkstat != 8)
 930                         ipath_dev_err(dd, "PCIe width %u, "
 931                                       "performance reduced\n", linkstat);
 932         }
 933         else
 934                 ipath_dev_err(dd, "Can't find PCI Express "
 935                               "capability!\n");
 936
 937         dd->ipath_link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
 938         dd->ipath_link_speed_supported = IPATH_IB_SDR;
 939         dd->ipath_link_width_enabled = IB_WIDTH_4X;
 940         dd->ipath_link_speed_enabled = dd->ipath_link_speed_supported;
 941         /* these can't change for this chip, so set once */
 942         dd->ipath_link_width_active = dd->ipath_link_width_enabled;
 943         dd->ipath_link_speed_active = dd->ipath_link_speed_enabled;
 944         return 0;
 945 }
 946
 947 static void ipath_init_pe_variables(struct ipath_devdata *dd)
 948 {
 949         /*
 950          * setup the register offsets, since they are different for each
 951          * chip
 952          */
 953         dd->ipath_kregs = &ipath_pe_kregs;
 954         dd->ipath_cregs = &ipath_pe_cregs;
 955
 956         /*
 957          * bits for selecting i2c direction and values,
 958          * used for I2C serial flash
 959          */
 960         dd->ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
 961         dd->ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
 962         dd->ipath_gpio_sda = IPATH_GPIO_SDA;
 963         dd->ipath_gpio_scl = IPATH_GPIO_SCL;
 964
 965         /*
 966          * Fill in data for field-values that change in newer chips.
 967          * We dynamically specify only the mask for LINKTRAININGSTATE
 968          * and only the shift for LINKSTATE, as they are the only ones
 969          * that change.  Also precalculate the 3 link states of interest
 970          * and the combined mask.
 971          */
 972         dd->ibcs_ls_shift = IBA6120_IBCS_LINKSTATE_SHIFT;
 973         dd->ibcs_lts_mask = IBA6120_IBCS_LINKTRAININGSTATE_MASK;
 974         dd->ibcs_mask = (INFINIPATH_IBCS_LINKSTATE_MASK <<
 975                 dd->ibcs_ls_shift) | dd->ibcs_lts_mask;
 976         dd->ib_init = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
 977                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
 978                 (INFINIPATH_IBCS_L_STATE_INIT << dd->ibcs_ls_shift);
 979         dd->ib_arm = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
 980                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
 981                 (INFINIPATH_IBCS_L_STATE_ARM << dd->ibcs_ls_shift);
 982         dd->ib_active = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
 983                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
 984                 (INFINIPATH_IBCS_L_STATE_ACTIVE << dd->ibcs_ls_shift);
 985
 986         /*
 987          * Fill in data for ibcc field-values that change in newer chips.
 988          * We dynamically specify only the mask for LINKINITCMD
 989          * and only the shift for LINKCMD and MAXPKTLEN, as they are
 990          * the only ones that change.
 991          */
 992         dd->ibcc_lic_mask = INFINIPATH_IBCC_LINKINITCMD_MASK;
 993         dd->ibcc_lc_shift = INFINIPATH_IBCC_LINKCMD_SHIFT;
 994         dd->ibcc_mpl_shift = INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
 995
 996         /* Fill in shifts for RcvCtrl. */
 997         dd->ipath_r_portenable_shift = INFINIPATH_R_PORTENABLE_SHIFT;
 998         dd->ipath_r_intravail_shift = INFINIPATH_R_INTRAVAIL_SHIFT;
 999         dd->ipath_r_tailupd_shift = INFINIPATH_R_TAILUPD_SHIFT;
1000         dd->ipath_r_portcfg_shift = 0; /* Not on IBA6120 */
1001
1002         /* variables for sanity checking interrupt and errors */
1003         dd->ipath_hwe_bitsextant =
1004                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1005                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
1006                 (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1007                  INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
1008                 (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
1009                  INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
1010                 INFINIPATH_HWE_PCIE1PLLFAILED |
1011                 INFINIPATH_HWE_PCIE0PLLFAILED |
1012                 INFINIPATH_HWE_PCIEPOISONEDTLP |
1013                 INFINIPATH_HWE_PCIECPLTIMEOUT |
1014                 INFINIPATH_HWE_PCIEBUSPARITYXTLH |
1015                 INFINIPATH_HWE_PCIEBUSPARITYXADM |
1016                 INFINIPATH_HWE_PCIEBUSPARITYRADM |
1017                 INFINIPATH_HWE_MEMBISTFAILED |
1018                 INFINIPATH_HWE_COREPLL_FBSLIP |
1019                 INFINIPATH_HWE_COREPLL_RFSLIP |
1020                 INFINIPATH_HWE_SERDESPLLFAILED |
1021                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
1022                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
1023         dd->ipath_i_bitsextant =
1024                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
1025                 (INFINIPATH_I_RCVAVAIL_MASK <<
1026                  INFINIPATH_I_RCVAVAIL_SHIFT) |
1027                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
1028                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
1029         dd->ipath_e_bitsextant =
1030                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
1031                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
1032                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
1033                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
1034                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
1035                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
1036                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
1037                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
1038                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
1039                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
1040                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
1041                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
1042                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
1043                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
1044                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
1045                 INFINIPATH_E_HARDWARE;
1046
1047         dd->ipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
1048         dd->ipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
1049         dd->ipath_i_rcvavail_shift = INFINIPATH_I_RCVAVAIL_SHIFT;
1050         dd->ipath_i_rcvurg_shift = INFINIPATH_I_RCVURG_SHIFT;
1051
1052         /*
1053          * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
1054          * 2 is Some Misc, 3 is reserved for future.
1055          */
1056         dd->ipath_eep_st_masks[0].hwerrs_to_log =
1057                 INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1058                 INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT;
1059
1060         /* Ignore errors in PIO/PBC on systems with unordered write-combining */
1061         if (ipath_unordered_wc())
1062                 dd->ipath_eep_st_masks[0].hwerrs_to_log &= ~TXE_PIO_PARITY;
1063
1064         dd->ipath_eep_st_masks[1].hwerrs_to_log =
1065                 INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1066                 INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT;
1067
1068         dd->ipath_eep_st_masks[2].errs_to_log =
1069                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET;
1070
1071
1072         dd->delay_mult = 2; /* SDR, 4X, can't change */
1073 }
1074
1075 /* setup the MSI stuff again after a reset.  I'd like to just call
1076  * pci_enable_msi() and request_irq() again, but when I do that,
1077  * the MSI enable bit doesn't get set in the command word, and
1078  * we switch to to a different interrupt vector, which is confusing,
1079  * so I instead just do it all inline.  Perhaps somehow can tie this
1080  * into the PCIe hotplug support at some point
1081  * Note, because I'm doing it all here, I don't call pci_disable_msi()
1082  * or free_irq() at the start of ipath_setup_pe_reset().
1083  */
1084 static int ipath_reinit_msi(struct ipath_devdata *dd)
1085 {
1086         int pos;
1087         u16 control;
1088         int ret;
1089
1090         if (!dd->ipath_msi_lo) {
1091                 dev_info(&dd->pcidev->dev, "Can't restore MSI config, "
1092                          "initial setup failed?\n");
1093                 ret = 0;
1094                 goto bail;
1095         }
1096
1097         if (!(pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
1098                 ipath_dev_err(dd, "Can't find MSI capability, "
1099                               "can't restore MSI settings\n");
1100                 ret = 0;
1101                 goto bail;
1102         }
1103         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1104                    dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
1105         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
1106                                dd->ipath_msi_lo);
1107         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1108                    dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
1109         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
1110                                dd->ipath_msi_hi);
1111         pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
1112         if (!(control & PCI_MSI_FLAGS_ENABLE)) {
1113                 ipath_cdbg(VERBOSE, "MSI control at off %x was %x, "
1114                            "setting MSI enable (%x)\n", pos + PCI_MSI_FLAGS,
1115                            control, control | PCI_MSI_FLAGS_ENABLE);
1116                 control |= PCI_MSI_FLAGS_ENABLE;
1117                 pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
1118                                       control);
1119         }
1120         /* now rewrite the data (vector) info */
1121         pci_write_config_word(dd->pcidev, pos +
1122                               ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
1123                               dd->ipath_msi_data);
1124         /* we restore the cachelinesize also, although it doesn't really
1125          * matter */
1126         pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
1127                               dd->ipath_pci_cacheline);
1128         /* and now set the pci master bit again */
1129         pci_set_master(dd->pcidev);
1130         ret = 1;
1131
1132 bail:
1133         return ret;
1134 }
1135
1136 /* This routine sleeps, so it can only be called from user context, not
1137  * from interrupt context.  If we need interrupt context, we can split
1138  * it into two routines.
1139 */
1140 static int ipath_setup_pe_reset(struct ipath_devdata *dd)
1141 {
1142         u64 val;
1143         int i;
1144         int ret;
1145
1146         /* Use ERROR so it shows up in logs, etc. */
1147         ipath_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->ipath_unit);
1148         /* keep chip from being accessed in a few places */
1149         dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT);
1150         val = dd->ipath_control | INFINIPATH_C_RESET;
1151         ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
1152         mb();
1153
1154         for (i = 1; i <= 5; i++) {
1155                 int r;
1156                 /* allow MBIST, etc. to complete; longer on each retry.
1157                  * We sometimes get machine checks from bus timeout if no
1158                  * response, so for now, make it *really* long.
1159                  */
1160                 msleep(1000 + (1 + i) * 2000);
1161                 if ((r =
1162                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
1163                                             dd->ipath_pcibar0)))
1164                         ipath_dev_err(dd, "rewrite of BAR0 failed: %d\n",
1165                                       r);
1166                 if ((r =
1167                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
1168                                             dd->ipath_pcibar1)))
1169                         ipath_dev_err(dd, "rewrite of BAR1 failed: %d\n",
1170                                       r);
1171                 /* now re-enable memory access */
1172                 if ((r = pci_enable_device(dd->pcidev)))
1173                         ipath_dev_err(dd, "pci_enable_device failed after "
1174                                       "reset: %d\n", r);
1175                 /* whether it worked or not, mark as present, again */
1176                 dd->ipath_flags |= IPATH_PRESENT;
1177                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
1178                 if (val == dd->ipath_revision) {
1179                         ipath_cdbg(VERBOSE, "Got matching revision "
1180                                    "register %llx on try %d\n",
1181                                    (unsigned long long) val, i);
1182                         ret = ipath_reinit_msi(dd);
1183                         goto bail;
1184                 }
1185                 /* Probably getting -1 back */
1186                 ipath_dbg("Didn't get expected revision register, "
1187                           "got %llx, try %d\n", (unsigned long long) val,
1188                           i + 1);
1189         }
1190         ret = 0; /* failed */
1191
1192 bail:
1193         return ret;
1194 }
1195
1196 /**
1197  * ipath_pe_put_tid - write a TID in chip
1198  * @dd: the infinipath device
1199  * @tidptr: pointer to the expected TID (in chip) to udpate
1200  * @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0) for expected
1201  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1202  *
1203  * This exists as a separate routine to allow for special locking etc.
1204  * It's used for both the full cleanup on exit, as well as the normal
1205  * setup and teardown.
1206  */
1207 static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
1208                              u32 type, unsigned long pa)
1209 {
1210         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1211         unsigned long flags = 0; /* keep gcc quiet */
1212
1213         if (pa != dd->ipath_tidinvalid) {
1214                 if (pa & ((1U << 11) - 1)) {
1215                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1216                                  "not 4KB aligned!\n", pa);
1217                         return;
1218                 }
1219                 pa >>= 11;
1220                 /* paranoia check */
1221                 if (pa & (7<<29))
1222                         ipath_dev_err(dd,
1223                                       "BUG: Physical page address 0x%lx "
1224                                       "has bits set in 31-29\n", pa);
1225
1226                 if (type == RCVHQ_RCV_TYPE_EAGER)
1227                         pa |= dd->ipath_tidtemplate;
1228                 else /* for now, always full 4KB page */
1229                         pa |= 2 << 29;
1230         }
1231
1232         /*
1233          * Workaround chip bug 9437 by writing the scratch register
1234          * before and after the TID, and with an io write barrier.
1235          * We use a spinlock around the writes, so they can't intermix
1236          * with other TID (eager or expected) writes (the chip bug
1237          * is triggered by back to back TID writes). Unfortunately, this
1238          * call can be done from interrupt level for the port 0 eager TIDs,
1239          * so we have to use irqsave locks.
1240          */
1241         spin_lock_irqsave(&dd->ipath_tid_lock, flags);
1242         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xfeeddeaf);
1243         if (dd->ipath_kregbase)
1244                 writel(pa, tidp32);
1245         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xdeadbeef);
1246         mmiowb();
1247         spin_unlock_irqrestore(&dd->ipath_tid_lock, flags);
1248 }
1249 /**
1250  * ipath_pe_put_tid_2 - write a TID in chip, Revision 2 or higher
1251  * @dd: the infinipath device
1252  * @tidptr: pointer to the expected TID (in chip) to udpate
1253  * @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0) for expected
1254  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1255  *
1256  * This exists as a separate routine to allow for selection of the
1257  * appropriate "flavor". The static calls in cleanup just use the
1258  * revision-agnostic form, as they are not performance critical.
1259  */
1260 static void ipath_pe_put_tid_2(struct ipath_devdata *dd, u64 __iomem *tidptr,
1261                              u32 type, unsigned long pa)
1262 {
1263         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1264
1265         if (pa != dd->ipath_tidinvalid) {
1266                 if (pa & ((1U << 11) - 1)) {
1267                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1268                                  "not 2KB aligned!\n", pa);
1269                         return;
1270                 }
1271                 pa >>= 11;
1272                 /* paranoia check */
1273                 if (pa & (7<<29))
1274                         ipath_dev_err(dd,
1275                                       "BUG: Physical page address 0x%lx "
1276                                       "has bits set in 31-29\n", pa);
1277
1278                 if (type == RCVHQ_RCV_TYPE_EAGER)
1279                         pa |= dd->ipath_tidtemplate;
1280                 else /* for now, always full 4KB page */
1281                         pa |= 2 << 29;
1282         }
1283         if (dd->ipath_kregbase)
1284                 writel(pa, tidp32);
1285         mmiowb();
1286 }
1287
1288
1289 /**
1290  * ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
1291  * @dd: the infinipath device
1292  * @port: the port
1293  *
1294  * clear all TID entries for a port, expected and eager.
1295  * Used from ipath_close().  On this chip, TIDs are only 32 bits,
1296  * not 64, but they are still on 64 bit boundaries, so tidbase
1297  * is declared as u64 * for the pointer math, even though we write 32 bits
1298  */
1299 static void ipath_pe_clear_tids(struct ipath_devdata *dd, unsigned port)
1300 {
1301         u64 __iomem *tidbase;
1302         unsigned long tidinv;
1303         int i;
1304
1305         if (!dd->ipath_kregbase)
1306                 return;
1307
1308         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1309
1310         tidinv = dd->ipath_tidinvalid;
1311         tidbase = (u64 __iomem *)
1312                 ((char __iomem *)(dd->ipath_kregbase) +
1313                  dd->ipath_rcvtidbase +
1314                  port * dd->ipath_rcvtidcnt * sizeof(*tidbase));
1315
1316         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1317                 dd->ipath_f_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
1318                                  tidinv);
1319
1320         tidbase = (u64 __iomem *)
1321                 ((char __iomem *)(dd->ipath_kregbase) +
1322                  dd->ipath_rcvegrbase +
1323                  port * dd->ipath_rcvegrcnt * sizeof(*tidbase));
1324
1325         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1326                 dd->ipath_f_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
1327                                  tidinv);
1328 }
1329
1330 /**
1331  * ipath_pe_tidtemplate - setup constants for TID updates
1332  * @dd: the infinipath device
1333  *
1334  * We setup stuff that we use a lot, to avoid calculating each time
1335  */
1336 static void ipath_pe_tidtemplate(struct ipath_devdata *dd)
1337 {
1338         u32 egrsize = dd->ipath_rcvegrbufsize;
1339
1340         /* For now, we always allocate 4KB buffers (at init) so we can
1341          * receive max size packets.  We may want a module parameter to
1342          * specify 2KB or 4KB and/or make be per port instead of per device
1343          * for those who want to reduce memory footprint.  Note that the
1344          * ipath_rcvhdrentsize size must be large enough to hold the largest
1345          * IB header (currently 96 bytes) that we expect to handle (plus of
1346          * course the 2 dwords of RHF).
1347          */
1348         if (egrsize == 2048)
1349                 dd->ipath_tidtemplate = 1U << 29;
1350         else if (egrsize == 4096)
1351                 dd->ipath_tidtemplate = 2U << 29;
1352         else {
1353                 egrsize = 4096;
1354                 dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize "
1355                          "%u, using %u\n", dd->ipath_rcvegrbufsize,
1356                          egrsize);
1357                 dd->ipath_tidtemplate = 2U << 29;
1358         }
1359         dd->ipath_tidinvalid = 0;
1360 }
1361
1362 static int ipath_pe_early_init(struct ipath_devdata *dd)
1363 {
1364         dd->ipath_flags |= IPATH_4BYTE_TID;
1365         if (ipath_unordered_wc())
1366                 dd->ipath_flags |= IPATH_PIO_FLUSH_WC;
1367
1368         /*
1369          * For openfabrics, we need to be able to handle an IB header of
1370          * 24 dwords.  HT chip has arbitrary sized receive buffers, so we
1371          * made them the same size as the PIO buffers.  This chip does not
1372          * handle arbitrary size buffers, so we need the header large enough
1373          * to handle largest IB header, but still have room for a 2KB MTU
1374          * standard IB packet.
1375          */
1376         dd->ipath_rcvhdrentsize = 24;
1377         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1378         dd->ipath_rhf_offset = 0;
1379         dd->ipath_egrtidbase = (u64 __iomem *)
1380                 ((char __iomem *) dd->ipath_kregbase + dd->ipath_rcvegrbase);
1381
1382         /*
1383          * To truly support a 4KB MTU (for usermode), we need to
1384          * bump this to a larger value.  For now, we use them for
1385          * the kernel only.
1386          */
1387         dd->ipath_rcvegrbufsize = 2048;
1388         /*
1389          * the min() check here is currently a nop, but it may not always
1390          * be, depending on just how we do ipath_rcvegrbufsize
1391          */
1392         dd->ipath_ibmaxlen = min(dd->ipath_piosize2k,
1393                                  dd->ipath_rcvegrbufsize +
1394                                  (dd->ipath_rcvhdrentsize << 2));
1395         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1396
1397         /*
1398          * We can request a receive interrupt for 1 or
1399          * more packets from current offset.  For now, we set this
1400          * up for a single packet.
1401          */
1402         dd->ipath_rhdrhead_intr_off = 1ULL<<32;
1403
1404         ipath_get_eeprom_info(dd);
1405
1406         return 0;
1407 }
1408
1409 int __attribute__((weak)) ipath_unordered_wc(void)
1410 {
1411         return 0;
1412 }
1413
1414 /**
1415  * ipath_init_pe_get_base_info - set chip-specific flags for user code
1416  * @pd: the infinipath port
1417  * @kbase: ipath_base_info pointer
1418  *
1419  * We set the PCIE flag because the lower bandwidth on PCIe vs
1420  * HyperTransport can affect some user packet algorithms.
1421  */
1422 static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
1423 {
1424         struct ipath_base_info *kinfo = kbase;
1425         struct ipath_devdata *dd;
1426
1427         if (ipath_unordered_wc()) {
1428                 kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
1429                 ipath_cdbg(PROC, "Intel processor, forcing WC order\n");
1430         }
1431         else
1432                 ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");
1433
1434         if (pd == NULL)
1435                 goto done;
1436
1437         dd = pd->port_dd;
1438
1439 done:
1440         kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE |
1441                 IPATH_RUNTIME_FORCE_PIOAVAIL | IPATH_RUNTIME_PIO_REGSWAPPED;
1442         return 0;
1443 }
1444
1445 static void ipath_pe_free_irq(struct ipath_devdata *dd)
1446 {
1447         free_irq(dd->ipath_irq, dd);
1448         dd->ipath_irq = 0;
1449 }
1450
1451
1452 static struct ipath_message_header *
1453 ipath_pe_get_msgheader(struct ipath_devdata *dd, __le32 *rhf_addr)
1454 {
1455         return (struct ipath_message_header *)
1456                 &rhf_addr[sizeof(u64) / sizeof(u32)];
1457 }
1458
1459 static void ipath_pe_config_ports(struct ipath_devdata *dd, ushort cfgports)
1460 {
1461         dd->ipath_portcnt =
1462                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
1463         dd->ipath_p0_rcvegrcnt =
1464                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
1465 }
1466
1467 static void ipath_pe_read_counters(struct ipath_devdata *dd,
1468                                    struct infinipath_counters *cntrs)
1469 {
1470         cntrs->LBIntCnt =
1471                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBIntCnt));
1472         cntrs->LBFlowStallCnt =
1473                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBFlowStallCnt));
1474         cntrs->TxSDmaDescCnt = 0;
1475         cntrs->TxUnsupVLErrCnt =
1476                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnsupVLErrCnt));
1477         cntrs->TxDataPktCnt =
1478                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDataPktCnt));
1479         cntrs->TxFlowPktCnt =
1480                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowPktCnt));
1481         cntrs->TxDwordCnt =
1482                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDwordCnt));
1483         cntrs->TxLenErrCnt =
1484                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxLenErrCnt));
1485         cntrs->TxMaxMinLenErrCnt =
1486                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxMaxMinLenErrCnt));
1487         cntrs->TxUnderrunCnt =
1488                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnderrunCnt));
1489         cntrs->TxFlowStallCnt =
1490                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowStallCnt));
1491         cntrs->TxDroppedPktCnt =
1492                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDroppedPktCnt));
1493         cntrs->RxDroppedPktCnt =
1494                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDroppedPktCnt));
1495         cntrs->RxDataPktCnt =
1496                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDataPktCnt));
1497         cntrs->RxFlowPktCnt =
1498                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowPktCnt));
1499         cntrs->RxDwordCnt =
1500                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDwordCnt));
1501         cntrs->RxLenErrCnt =
1502                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLenErrCnt));
1503         cntrs->RxMaxMinLenErrCnt =
1504                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxMaxMinLenErrCnt));
1505         cntrs->RxICRCErrCnt =
1506                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxICRCErrCnt));
1507         cntrs->RxVCRCErrCnt =
1508                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxVCRCErrCnt));
1509         cntrs->RxFlowCtrlErrCnt =
1510                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowCtrlErrCnt));
1511         cntrs->RxBadFormatCnt =
1512                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBadFormatCnt));
1513         cntrs->RxLinkProblemCnt =
1514                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLinkProblemCnt));
1515         cntrs->RxEBPCnt =
1516                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxEBPCnt));
1517         cntrs->RxLPCRCErrCnt =
1518                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLPCRCErrCnt));
1519         cntrs->RxBufOvflCnt =
1520                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBufOvflCnt));
1521         cntrs->RxTIDFullErrCnt =
1522                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDFullErrCnt));
1523         cntrs->RxTIDValidErrCnt =
1524                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDValidErrCnt));
1525         cntrs->RxPKeyMismatchCnt =
1526                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxPKeyMismatchCnt));
1527         cntrs->RxP0HdrEgrOvflCnt =
1528                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt));
1529         cntrs->RxP1HdrEgrOvflCnt =
1530                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP1HdrEgrOvflCnt));
1531         cntrs->RxP2HdrEgrOvflCnt =
1532                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP2HdrEgrOvflCnt));
1533         cntrs->RxP3HdrEgrOvflCnt =
1534                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP3HdrEgrOvflCnt));
1535         cntrs->RxP4HdrEgrOvflCnt =
1536                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP4HdrEgrOvflCnt));
1537         cntrs->RxP5HdrEgrOvflCnt = 0;
1538         cntrs->RxP6HdrEgrOvflCnt = 0;
1539         cntrs->RxP7HdrEgrOvflCnt = 0;
1540         cntrs->RxP8HdrEgrOvflCnt = 0;
1541         cntrs->RxP9HdrEgrOvflCnt = 0;
1542         cntrs->RxP10HdrEgrOvflCnt = 0;
1543         cntrs->RxP11HdrEgrOvflCnt = 0;
1544         cntrs->RxP12HdrEgrOvflCnt = 0;
1545         cntrs->RxP13HdrEgrOvflCnt = 0;
1546         cntrs->RxP14HdrEgrOvflCnt = 0;
1547         cntrs->RxP15HdrEgrOvflCnt = 0;
1548         cntrs->RxP16HdrEgrOvflCnt = 0;
1549         cntrs->IBStatusChangeCnt =
1550                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBStatusChangeCnt));
1551         cntrs->IBLinkErrRecoveryCnt =
1552                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt));
1553         cntrs->IBLinkDownedCnt =
1554                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkDownedCnt));
1555         cntrs->IBSymbolErrCnt =
1556                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBSymbolErrCnt));
1557         cntrs->RxVL15DroppedPktCnt = 0;
1558         cntrs->RxOtherLocalPhyErrCnt = 0;
1559         cntrs->PcieRetryBufDiagQwordCnt = 0;
1560         cntrs->ExcessBufferOvflCnt = dd->ipath_overrun_thresh_errs;
1561         cntrs->LocalLinkIntegrityErrCnt = dd->ipath_lli_errs;
1562         cntrs->RxVlErrCnt = 0;
1563         cntrs->RxDlidFltrCnt = 0;
1564 }
1565
1566
1567 /* no interrupt fallback for these chips */
1568 static int ipath_pe_nointr_fallback(struct ipath_devdata *dd)
1569 {
1570         return 0;
1571 }
1572
1573
1574 /*
1575  * reset the XGXS (between serdes and IBC).  Slightly less intrusive
1576  * than resetting the IBC or external link state, and useful in some
1577  * cases to cause some retraining.  To do this right, we reset IBC
1578  * as well.
1579  */
1580 static void ipath_pe_xgxs_reset(struct ipath_devdata *dd)
1581 {
1582         u64 val, prev_val;
1583
1584         prev_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1585         val = prev_val | INFINIPATH_XGXS_RESET;
1586         prev_val &= ~INFINIPATH_XGXS_RESET; /* be sure */
1587         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
1588                          dd->ipath_control & ~INFINIPATH_C_LINKENABLE);
1589         ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1590         ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1591         ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, prev_val);
1592         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
1593                          dd->ipath_control);
1594 }
1595
1596
1597 static int ipath_pe_get_ib_cfg(struct ipath_devdata *dd, int which)
1598 {
1599         int ret;
1600
1601         switch (which) {
1602         case IPATH_IB_CFG_LWID:
1603                 ret = dd->ipath_link_width_active;
1604                 break;
1605         case IPATH_IB_CFG_SPD:
1606                 ret = dd->ipath_link_speed_active;
1607                 break;
1608         case IPATH_IB_CFG_LWID_ENB:
1609                 ret = dd->ipath_link_width_enabled;
1610                 break;
1611         case IPATH_IB_CFG_SPD_ENB:
1612                 ret = dd->ipath_link_speed_enabled;
1613                 break;
1614         default:
1615                 ret =  -ENOTSUPP;
1616                 break;
1617         }
1618         return ret;
1619 }
1620
1621
1622 /* we assume range checking is already done, if needed */
1623 static int ipath_pe_set_ib_cfg(struct ipath_devdata *dd, int which, u32 val)
1624 {
1625         int ret = 0;
1626
1627         if (which == IPATH_IB_CFG_LWID_ENB)
1628                 dd->ipath_link_width_enabled = val;
1629         else if (which == IPATH_IB_CFG_SPD_ENB)
1630                 dd->ipath_link_speed_enabled = val;
1631         else
1632                 ret = -ENOTSUPP;
1633         return ret;
1634 }
1635
1636 static void ipath_pe_config_jint(struct ipath_devdata *dd, u16 a, u16 b)
1637 {
1638 }
1639
1640
1641 static int ipath_pe_ib_updown(struct ipath_devdata *dd, int ibup, u64 ibcs)
1642 {
1643         ipath_setup_pe_setextled(dd, ipath_ib_linkstate(dd, ibcs),
1644                 ipath_ib_linktrstate(dd, ibcs));
1645         return 0;
1646 }
1647
1648
1649 /**
1650  * ipath_init_iba6120_funcs - set up the chip-specific function pointers
1651  * @dd: the infinipath device
1652  *
1653  * This is global, and is called directly at init to set up the
1654  * chip-specific function pointers for later use.
1655  */
1656 void ipath_init_iba6120_funcs(struct ipath_devdata *dd)
1657 {
1658         dd->ipath_f_intrsetup = ipath_pe_intconfig;
1659         dd->ipath_f_bus = ipath_setup_pe_config;
1660         dd->ipath_f_reset = ipath_setup_pe_reset;
1661         dd->ipath_f_get_boardname = ipath_pe_boardname;
1662         dd->ipath_f_init_hwerrors = ipath_pe_init_hwerrors;
1663         dd->ipath_f_early_init = ipath_pe_early_init;
1664         dd->ipath_f_handle_hwerrors = ipath_pe_handle_hwerrors;
1665         dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
1666         dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
1667         dd->ipath_f_clear_tids = ipath_pe_clear_tids;
1668         /*
1669          * _f_put_tid may get changed after we read the chip revision,
1670          * but we start with the safe version for all revs
1671          */
1672         dd->ipath_f_put_tid = ipath_pe_put_tid;
1673         dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
1674         dd->ipath_f_setextled = ipath_setup_pe_setextled;
1675         dd->ipath_f_get_base_info = ipath_pe_get_base_info;
1676         dd->ipath_f_free_irq = ipath_pe_free_irq;
1677         dd->ipath_f_tidtemplate = ipath_pe_tidtemplate;
1678         dd->ipath_f_intr_fallback = ipath_pe_nointr_fallback;
1679         dd->ipath_f_xgxs_reset = ipath_pe_xgxs_reset;
1680         dd->ipath_f_get_msgheader = ipath_pe_get_msgheader;
1681         dd->ipath_f_config_ports = ipath_pe_config_ports;
1682         dd->ipath_f_read_counters = ipath_pe_read_counters;
1683         dd->ipath_f_get_ib_cfg = ipath_pe_get_ib_cfg;
1684         dd->ipath_f_set_ib_cfg = ipath_pe_set_ib_cfg;
1685         dd->ipath_f_config_jint = ipath_pe_config_jint;
1686         dd->ipath_f_ib_updown = ipath_pe_ib_updown;
1687
1688
1689         /* initialize chip-specific variables */
1690         ipath_init_pe_variables(dd);
1691 }
1692