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 #include <rdma/ib_verbs.h>
  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_control bits */
 315 #define INFINIPATH_C_RESET 1U
 316
 317 /* kr_intstatus, kr_intclear, kr_intmask bits */
 318 #define INFINIPATH_I_RCVURG_MASK ((1U<<5)-1)
 319 #define INFINIPATH_I_RCVURG_SHIFT 0
 320 #define INFINIPATH_I_RCVAVAIL_MASK ((1U<<5)-1)
 321 #define INFINIPATH_I_RCVAVAIL_SHIFT 12
 322
 323 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 324 #define INFINIPATH_HWE_PCIEMEMPARITYERR_MASK  0x000000000000003fULL
 325 #define INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT 0
 326 #define INFINIPATH_HWE_PCIEPOISONEDTLP      0x0000000010000000ULL
 327 #define INFINIPATH_HWE_PCIECPLTIMEOUT       0x0000000020000000ULL
 328 #define INFINIPATH_HWE_PCIEBUSPARITYXTLH    0x0000000040000000ULL
 329 #define INFINIPATH_HWE_PCIEBUSPARITYXADM    0x0000000080000000ULL
 330 #define INFINIPATH_HWE_PCIEBUSPARITYRADM    0x0000000100000000ULL
 331 #define INFINIPATH_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 332 #define INFINIPATH_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 333 #define INFINIPATH_HWE_PCIE1PLLFAILED       0x0400000000000000ULL
 334 #define INFINIPATH_HWE_PCIE0PLLFAILED       0x0800000000000000ULL
 335 #define INFINIPATH_HWE_SERDESPLLFAILED      0x1000000000000000ULL
 336
 337 #define IBA6120_IBCS_LINKTRAININGSTATE_MASK 0xf
 338 #define IBA6120_IBCS_LINKSTATE_SHIFT 4
 339
 340 /* kr_extstatus bits */
 341 #define INFINIPATH_EXTS_FREQSEL 0x2
 342 #define INFINIPATH_EXTS_SERDESSEL 0x4
 343 #define INFINIPATH_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 344 #define INFINIPATH_EXTS_MEMBIST_FOUND       0x0000000000008000
 345
 346 /* kr_xgxsconfig bits */
 347 #define INFINIPATH_XGXS_RESET          0x5ULL
 348
 349 #define _IPATH_GPIO_SDA_NUM 1
 350 #define _IPATH_GPIO_SCL_NUM 0
 351
 352 #define IPATH_GPIO_SDA (1ULL << \
 353         (_IPATH_GPIO_SDA_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 354 #define IPATH_GPIO_SCL (1ULL << \
 355         (_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
 356
 357 #define INFINIPATH_RT_BUFSIZE_MASK 0xe0000000ULL
 358 #define INFINIPATH_RT_BUFSIZE_SHIFTVAL(tid) \
 359         ((((tid) & INFINIPATH_RT_BUFSIZE_MASK) >> 29) + 11 - 1)
 360 #define INFINIPATH_RT_BUFSIZE(tid) (1 << INFINIPATH_RT_BUFSIZE_SHIFTVAL(tid))
 361 #define INFINIPATH_RT_IS_VALID(tid) \
 362         (((tid) & INFINIPATH_RT_BUFSIZE_MASK) && \
 363          ((((tid) & INFINIPATH_RT_BUFSIZE_MASK) != INFINIPATH_RT_BUFSIZE_MASK)))
 364 #define INFINIPATH_RT_ADDR_MASK 0x1FFFFFFFULL /* 29 bits valid */
 365 #define INFINIPATH_RT_ADDR_SHIFT 10
 366
 367 #define INFINIPATH_R_INTRAVAIL_SHIFT 16
 368 #define INFINIPATH_R_TAILUPD_SHIFT 31
 369
 370 /* 6120 specific hardware errors... */
 371 static const struct ipath_hwerror_msgs ipath_6120_hwerror_msgs[] = {
 372         INFINIPATH_HWE_MSG(PCIEPOISONEDTLP, "PCIe Poisoned TLP"),
 373         INFINIPATH_HWE_MSG(PCIECPLTIMEOUT, "PCIe completion timeout"),
 374         /*
 375          * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
 376          * parity or memory parity error failures, because most likely we
 377          * won't be able to talk to the core of the chip.  Nonetheless, we
 378          * might see them, if they are in parts of the PCIe core that aren't
 379          * essential.
 380          */
 381         INFINIPATH_HWE_MSG(PCIE1PLLFAILED, "PCIePLL1"),
 382         INFINIPATH_HWE_MSG(PCIE0PLLFAILED, "PCIePLL0"),
 383         INFINIPATH_HWE_MSG(PCIEBUSPARITYXTLH, "PCIe XTLH core parity"),
 384         INFINIPATH_HWE_MSG(PCIEBUSPARITYXADM, "PCIe ADM TX core parity"),
 385         INFINIPATH_HWE_MSG(PCIEBUSPARITYRADM, "PCIe ADM RX core parity"),
 386         INFINIPATH_HWE_MSG(RXDSYNCMEMPARITYERR, "Rx Dsync"),
 387         INFINIPATH_HWE_MSG(SERDESPLLFAILED, "SerDes PLL"),
 388 };
 389
 390 #define TXE_PIO_PARITY ((INFINIPATH_HWE_TXEMEMPARITYERR_PIOBUF | \
 391                         INFINIPATH_HWE_TXEMEMPARITYERR_PIOPBC) \
 392                         << INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT)
 393 #define RXE_EAGER_PARITY (INFINIPATH_HWE_RXEMEMPARITYERR_EAGERTID \
 394                           << INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT)
 395
 396 static void ipath_pe_put_tid_2(struct ipath_devdata *, u64 __iomem *,
 397                                u32, unsigned long);
 398
 399 /*
 400  * On platforms using this chip, and not having ordered WC stores, we
 401  * can get TXE parity errors due to speculative reads to the PIO buffers,
 402  * and this, due to a chip bug can result in (many) false parity error
 403  * reports.  So it's a debug print on those, and an info print on systems
 404  * where the speculative reads don't occur.
 405  */
 406 static void ipath_pe_txe_recover(struct ipath_devdata *dd)
 407 {
 408         if (ipath_unordered_wc())
 409                 ipath_dbg("Recovering from TXE PIO parity error\n");
 410         else {
 411                 ++ipath_stats.sps_txeparity;
 412                 dev_info(&dd->pcidev->dev,
 413                         "Recovering from TXE PIO parity error\n");
 414         }
 415 }
 416
 417
 418 /**
 419  * ipath_pe_handle_hwerrors - display hardware errors.
 420  * @dd: the infinipath device
 421  * @msg: the output buffer
 422  * @msgl: the size of the output buffer
 423  *
 424  * Use same msg buffer as regular errors to avoid excessive stack
 425  * use.  Most hardware errors are catastrophic, but for right now,
 426  * we'll print them and continue.  We reuse the same message buffer as
 427  * ipath_handle_errors() to avoid excessive stack usage.
 428  */
 429 static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 430                                      size_t msgl)
 431 {
 432         ipath_err_t hwerrs;
 433         u32 bits, ctrl;
 434         int isfatal = 0;
 435         char bitsmsg[64];
 436         int log_idx;
 437
 438         hwerrs = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus);
 439         if (!hwerrs) {
 440                 /*
 441                  * better than printing cofusing messages
 442                  * This seems to be related to clearing the crc error, or
 443                  * the pll error during init.
 444                  */
 445                 ipath_cdbg(VERBOSE, "Called but no hardware errors set\n");
 446                 return;
 447         } else if (hwerrs == ~0ULL) {
 448                 ipath_dev_err(dd, "Read of hardware error status failed "
 449                               "(all bits set); ignoring\n");
 450                 return;
 451         }
 452         ipath_stats.sps_hwerrs++;
 453
 454         /* Always clear the error status register, except MEMBISTFAIL,
 455          * regardless of whether we continue or stop using the chip.
 456          * We want that set so we know it failed, even across driver reload.
 457          * We'll still ignore it in the hwerrmask.  We do this partly for
 458          * diagnostics, but also for support */
 459         ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 460                          hwerrs&~INFINIPATH_HWE_MEMBISTFAILED);
 461
 462         hwerrs &= dd->ipath_hwerrmask;
 463
 464         /* We log some errors to EEPROM, check if we have any of those. */
 465         for (log_idx = 0; log_idx < IPATH_EEP_LOG_CNT; ++log_idx)
 466                 if (hwerrs & dd->ipath_eep_st_masks[log_idx].hwerrs_to_log)
 467                         ipath_inc_eeprom_err(dd, log_idx, 1);
 468
 469         /*
 470          * make sure we get this much out, unless told to be quiet,
 471          * or it's occurred within the last 5 seconds
 472          */
 473         if ((hwerrs & ~(dd->ipath_lasthwerror | TXE_PIO_PARITY |
 474                         RXE_EAGER_PARITY)) ||
 475             (ipath_debug & __IPATH_VERBDBG))
 476                 dev_info(&dd->pcidev->dev, "Hardware error: hwerr=0x%llx "
 477                          "(cleared)\n", (unsigned long long) hwerrs);
 478         dd->ipath_lasthwerror |= hwerrs;
 479
 480         if (hwerrs & ~dd->ipath_hwe_bitsextant)
 481                 ipath_dev_err(dd, "hwerror interrupt with unknown errors "
 482                               "%llx set\n", (unsigned long long)
 483                               (hwerrs & ~dd->ipath_hwe_bitsextant));
 484
 485         ctrl = ipath_read_kreg32(dd, dd->ipath_kregs->kr_control);
 486         if ((ctrl & INFINIPATH_C_FREEZEMODE) && !ipath_diag_inuse) {
 487                 /*
 488                  * parity errors in send memory are recoverable,
 489                  * just cancel the send (if indicated in * sendbuffererror),
 490                  * count the occurrence, unfreeze (if no other handled
 491                  * hardware error bits are set), and continue. They can
 492                  * occur if a processor speculative read is done to the PIO
 493                  * buffer while we are sending a packet, for example.
 494                  */
 495                 if (hwerrs & TXE_PIO_PARITY) {
 496                         ipath_pe_txe_recover(dd);
 497                         hwerrs &= ~TXE_PIO_PARITY;
 498                 }
 499                 if (!hwerrs) {
 500                         static u32 freeze_cnt;
 501
 502                         freeze_cnt++;
 503                         ipath_dbg("Clearing freezemode on ignored or recovered "
 504                                   "hardware error (%u)\n", freeze_cnt);
 505                         ipath_clear_freeze(dd);
 506                 }
 507         }
 508
 509         *msg = '\0';
 510
 511         if (hwerrs & INFINIPATH_HWE_MEMBISTFAILED) {
 512                 strlcat(msg, "[Memory BIST test failed, InfiniPath hardware unusable]",
 513                         msgl);
 514                 /* ignore from now on, so disable until driver reloaded */
 515                 *dd->ipath_statusp |= IPATH_STATUS_HWERROR;
 516                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_MEMBISTFAILED;
 517                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 518                                  dd->ipath_hwerrmask);
 519         }
 520
 521         ipath_format_hwerrors(hwerrs,
 522                               ipath_6120_hwerror_msgs,
 523                               sizeof(ipath_6120_hwerror_msgs)/
 524                               sizeof(ipath_6120_hwerror_msgs[0]),
 525                               msg, msgl);
 526
 527         if (hwerrs & (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK
 528                       << INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT)) {
 529                 bits = (u32) ((hwerrs >>
 530                                INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) &
 531                               INFINIPATH_HWE_PCIEMEMPARITYERR_MASK);
 532                 snprintf(bitsmsg, sizeof bitsmsg,
 533                          "[PCIe Mem Parity Errs %x] ", bits);
 534                 strlcat(msg, bitsmsg, msgl);
 535         }
 536
 537 #define _IPATH_PLL_FAIL (INFINIPATH_HWE_COREPLL_FBSLIP |        \
 538                          INFINIPATH_HWE_COREPLL_RFSLIP )
 539
 540         if (hwerrs & _IPATH_PLL_FAIL) {
 541                 snprintf(bitsmsg, sizeof bitsmsg,
 542                          "[PLL failed (%llx), InfiniPath hardware unusable]",
 543                          (unsigned long long) hwerrs & _IPATH_PLL_FAIL);
 544                 strlcat(msg, bitsmsg, msgl);
 545                 /* ignore from now on, so disable until driver reloaded */
 546                 dd->ipath_hwerrmask &= ~(hwerrs & _IPATH_PLL_FAIL);
 547                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 548                                  dd->ipath_hwerrmask);
 549         }
 550
 551         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
 552                 /*
 553                  * If it occurs, it is left masked since the external
 554                  * interface is unused
 555                  */
 556                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 557                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
 558                                  dd->ipath_hwerrmask);
 559         }
 560
 561         if (*msg)
 562                 ipath_dev_err(dd, "%s hardware error\n", msg);
 563         if (isfatal && !ipath_diag_inuse && dd->ipath_freezemsg) {
 564                 /*
 565                  * for /sys status file ; if no trailing } is copied, we'll
 566                  * know it was truncated.
 567                  */
 568                 snprintf(dd->ipath_freezemsg, dd->ipath_freezelen,
 569                          "{%s}", msg);
 570         }
 571 }
 572
 573 /**
 574  * ipath_pe_boardname - fill in the board name
 575  * @dd: the infinipath device
 576  * @name: the output buffer
 577  * @namelen: the size of the output buffer
 578  *
 579  * info is based on the board revision register
 580  */
 581 static int ipath_pe_boardname(struct ipath_devdata *dd, char *name,
 582                               size_t namelen)
 583 {
 584         char *n = NULL;
 585         u8 boardrev = dd->ipath_boardrev;
 586         int ret;
 587
 588         switch (boardrev) {
 589         case 0:
 590                 n = "InfiniPath_Emulation";
 591                 break;
 592         case 1:
 593                 n = "InfiniPath_QLE7140-Bringup";
 594                 break;
 595         case 2:
 596                 n = "InfiniPath_QLE7140";
 597                 break;
 598         case 3:
 599                 n = "InfiniPath_QMI7140";
 600                 break;
 601         case 4:
 602                 n = "InfiniPath_QEM7140";
 603                 break;
 604         case 5:
 605                 n = "InfiniPath_QMH7140";
 606                 break;
 607         case 6:
 608                 n = "InfiniPath_QLE7142";
 609                 break;
 610         default:
 611                 ipath_dev_err(dd,
 612                               "Don't yet know about board with ID %u\n",
 613                               boardrev);
 614                 snprintf(name, namelen, "Unknown_InfiniPath_PCIe_%u",
 615                          boardrev);
 616                 break;
 617         }
 618         if (n)
 619                 snprintf(name, namelen, "%s", n);
 620
 621         if (dd->ipath_majrev != 4 || !dd->ipath_minrev || dd->ipath_minrev>2) {
 622                 ipath_dev_err(dd, "Unsupported InfiniPath hardware revision %u.%u!\n",
 623                               dd->ipath_majrev, dd->ipath_minrev);
 624                 ret = 1;
 625         } else {
 626                 ret = 0;
 627                 if (dd->ipath_minrev >= 2)
 628                         dd->ipath_f_put_tid = ipath_pe_put_tid_2;
 629         }
 630
 631         /*
 632          * set here, not in ipath_init_*_funcs because we have to do
 633          * it after we can read chip registers.
 634          */
 635         dd->ipath_ureg_align =
 636                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
 637
 638         return ret;
 639 }
 640
 641 /**
 642  * ipath_pe_init_hwerrors - enable hardware errors
 643  * @dd: the infinipath device
 644  *
 645  * now that we have finished initializing everything that might reasonably
 646  * cause a hardware error, and cleared those errors bits as they occur,
 647  * we can enable hardware errors in the mask (potentially enabling
 648  * freeze mode), and enable hardware errors as errors (along with
 649  * everything else) in errormask
 650  */
 651 static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
 652 {
 653         ipath_err_t val;
 654         u64 extsval;
 655
 656         extsval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);
 657
 658         if (!(extsval & INFINIPATH_EXTS_MEMBIST_ENDTEST))
 659                 ipath_dev_err(dd, "MemBIST did not complete!\n");
 660         if (extsval & INFINIPATH_EXTS_MEMBIST_FOUND)
 661                 ipath_dbg("MemBIST corrected\n");
 662
 663         val = ~0ULL;    /* barring bugs, all hwerrors become interrupts, */
 664
 665         if (!dd->ipath_boardrev)        // no PLL for Emulator
 666                 val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
 667
 668         if (dd->ipath_minrev < 2) {
 669                 /* workaround bug 9460 in internal interface bus parity
 670                  * checking. Fixed (HW bug 9490) in Rev2.
 671                  */
 672                 val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
 673         }
 674         dd->ipath_hwerrmask = val;
 675 }
 676
 677 /**
 678  * ipath_pe_bringup_serdes - bring up the serdes
 679  * @dd: the infinipath device
 680  */
 681 static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
 682 {
 683         u64 val, config1, prev_val;
 684         int ret = 0;
 685
 686         ipath_dbg("Trying to bringup serdes\n");
 687
 688         if (ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus) &
 689             INFINIPATH_HWE_SERDESPLLFAILED) {
 690                 ipath_dbg("At start, serdes PLL failed bit set "
 691                           "in hwerrstatus, clearing and continuing\n");
 692                 ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
 693                                  INFINIPATH_HWE_SERDESPLLFAILED);
 694         }
 695
 696         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 697         config1 = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig1);
 698
 699         ipath_cdbg(VERBOSE, "SerDes status config0=%llx config1=%llx, "
 700                    "xgxsconfig %llx\n", (unsigned long long) val,
 701                    (unsigned long long) config1, (unsigned long long)
 702                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 703
 704         /*
 705          * Force reset on, also set rxdetect enable.  Must do before reading
 706          * serdesstatus at least for simulation, or some of the bits in
 707          * serdes status will come back as undefined and cause simulation
 708          * failures
 709          */
 710         val |= INFINIPATH_SERDC0_RESET_PLL | INFINIPATH_SERDC0_RXDETECT_EN
 711                 | INFINIPATH_SERDC0_L1PWR_DN;
 712         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 713         /* be sure chip saw it */
 714         ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 715         udelay(5);              /* need pll reset set at least for a bit */
 716         /*
 717          * after PLL is reset, set the per-lane Resets and TxIdle and
 718          * clear the PLL reset and rxdetect (to get falling edge).
 719          * Leave L1PWR bits set (permanently)
 720          */
 721         val &= ~(INFINIPATH_SERDC0_RXDETECT_EN | INFINIPATH_SERDC0_RESET_PLL
 722                  | INFINIPATH_SERDC0_L1PWR_DN);
 723         val |= INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE;
 724         ipath_cdbg(VERBOSE, "Clearing pll reset and setting lane resets "
 725                    "and txidle (%llx)\n", (unsigned long long) val);
 726         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 727         /* be sure chip saw it */
 728         ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 729         /* need PLL reset clear for at least 11 usec before lane
 730          * resets cleared; give it a few more to be sure */
 731         udelay(15);
 732         val &= ~(INFINIPATH_SERDC0_RESET_MASK | INFINIPATH_SERDC0_TXIDLE);
 733
 734         ipath_cdbg(VERBOSE, "Clearing lane resets and txidle "
 735                    "(writing %llx)\n", (unsigned long long) val);
 736         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 737         /* be sure chip saw it */
 738         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
 739
 740         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
 741         prev_val = val;
 742         if (val & INFINIPATH_XGXS_RESET)
 743                 val &= ~INFINIPATH_XGXS_RESET;
 744         if (((val >> INFINIPATH_XGXS_RX_POL_SHIFT) &
 745              INFINIPATH_XGXS_RX_POL_MASK) != dd->ipath_rx_pol_inv ) {
 746                 /* need to compensate for Tx inversion in partner */
 747                 val &= ~(INFINIPATH_XGXS_RX_POL_MASK <<
 748                          INFINIPATH_XGXS_RX_POL_SHIFT);
 749                 val |= dd->ipath_rx_pol_inv <<
 750                         INFINIPATH_XGXS_RX_POL_SHIFT;
 751         }
 752         if (val != prev_val)
 753                 ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
 754
 755         val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 756
 757         /* clear current and de-emphasis bits */
 758         config1 &= ~0x0ffffffff00ULL;
 759         /* set current to 20ma */
 760         config1 |= 0x00000000000ULL;
 761         /* set de-emphasis to -5.68dB */
 762         config1 |= 0x0cccc000000ULL;
 763         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig1, config1);
 764
 765         ipath_cdbg(VERBOSE, "done: SerDes status config0=%llx "
 766                    "config1=%llx, sstatus=%llx xgxs=%llx\n",
 767                    (unsigned long long) val, (unsigned long long) config1,
 768                    (unsigned long long)
 769                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesstatus),
 770                    (unsigned long long)
 771                    ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig));
 772
 773         return ret;
 774 }
 775
 776 /**
 777  * ipath_pe_quiet_serdes - set serdes to txidle
 778  * @dd: the infinipath device
 779  * Called when driver is being unloaded
 780  */
 781 static void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
 782 {
 783         u64 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
 784
 785         val |= INFINIPATH_SERDC0_TXIDLE;
 786         ipath_dbg("Setting TxIdleEn on serdes (config0 = %llx)\n",
 787                   (unsigned long long) val);
 788         ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
 789 }
 790
 791 static int ipath_pe_intconfig(struct ipath_devdata *dd)
 792 {
 793         u32 chiprev;
 794
 795         /*
 796          * If the chip supports added error indication via GPIO pins,
 797          * enable interrupts on those bits so the interrupt routine
 798          * can count the events. Also set flag so interrupt routine
 799          * can know they are expected.
 800          */
 801         chiprev = dd->ipath_revision >> INFINIPATH_R_CHIPREVMINOR_SHIFT;
 802         if ((chiprev & INFINIPATH_R_CHIPREVMINOR_MASK) > 1) {
 803                 /* Rev2+ reports extra errors via internal GPIO pins */
 804                 dd->ipath_flags |= IPATH_GPIO_ERRINTRS;
 805                 dd->ipath_gpio_mask |= IPATH_GPIO_ERRINTR_MASK;
 806                 ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
 807                                  dd->ipath_gpio_mask);
 808         }
 809         return 0;
 810 }
 811
 812 /**
 813  * ipath_setup_pe_setextled - set the state of the two external LEDs
 814  * @dd: the infinipath device
 815  * @lst: the L state
 816  * @ltst: the LT state
 817
 818  * These LEDs indicate the physical and logical state of IB link.
 819  * For this chip (at least with recommended board pinouts), LED1
 820  * is Yellow (logical state) and LED2 is Green (physical state),
 821  *
 822  * Note:  We try to match the Mellanox HCA LED behavior as best
 823  * we can.  Green indicates physical link state is OK (something is
 824  * plugged in, and we can train).
 825  * Amber indicates the link is logically up (ACTIVE).
 826  * Mellanox further blinks the amber LED to indicate data packet
 827  * activity, but we have no hardware support for that, so it would
 828  * require waking up every 10-20 msecs and checking the counters
 829  * on the chip, and then turning the LED off if appropriate.  That's
 830  * visible overhead, so not something we will do.
 831  *
 832  */
 833 static void ipath_setup_pe_setextled(struct ipath_devdata *dd, u64 lst,
 834                                      u64 ltst)
 835 {
 836         u64 extctl;
 837         unsigned long flags = 0;
 838
 839         /* the diags use the LED to indicate diag info, so we leave
 840          * the external LED alone when the diags are running */
 841         if (ipath_diag_inuse)
 842                 return;
 843
 844         /* Allow override of LED display for, e.g. Locating system in rack */
 845         if (dd->ipath_led_override) {
 846                 ltst = (dd->ipath_led_override & IPATH_LED_PHYS)
 847                         ? INFINIPATH_IBCS_LT_STATE_LINKUP
 848                         : INFINIPATH_IBCS_LT_STATE_DISABLED;
 849                 lst = (dd->ipath_led_override & IPATH_LED_LOG)
 850                         ? INFINIPATH_IBCS_L_STATE_ACTIVE
 851                         : INFINIPATH_IBCS_L_STATE_DOWN;
 852         }
 853
 854         spin_lock_irqsave(&dd->ipath_gpio_lock, flags);
 855         extctl = dd->ipath_extctrl & ~(INFINIPATH_EXTC_LED1PRIPORT_ON |
 856                                        INFINIPATH_EXTC_LED2PRIPORT_ON);
 857
 858         if (ltst == INFINIPATH_IBCS_LT_STATE_LINKUP)
 859                 extctl |= INFINIPATH_EXTC_LED2PRIPORT_ON;
 860         if (lst == INFINIPATH_IBCS_L_STATE_ACTIVE)
 861                 extctl |= INFINIPATH_EXTC_LED1PRIPORT_ON;
 862         dd->ipath_extctrl = extctl;
 863         ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, extctl);
 864         spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);
 865 }
 866
 867 /**
 868  * ipath_setup_pe_cleanup - clean up any per-chip chip-specific stuff
 869  * @dd: the infinipath device
 870  *
 871  * This is called during driver unload.
 872  * We do the pci_disable_msi here, not in generic code, because it
 873  * isn't used for the HT chips. If we do end up needing pci_enable_msi
 874  * at some point in the future for HT, we'll move the call back
 875  * into the main init_one code.
 876  */
 877 static void ipath_setup_pe_cleanup(struct ipath_devdata *dd)
 878 {
 879         dd->ipath_msi_lo = 0;   /* just in case unload fails */
 880         pci_disable_msi(dd->pcidev);
 881 }
 882
 883 static void ipath_6120_pcie_params(struct ipath_devdata *dd)
 884 {
 885         u16 linkstat, speed;
 886         int pos;
 887
 888         pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_EXP);
 889         if (!pos) {
 890                 ipath_dev_err(dd, "Can't find PCI Express capability!\n");
 891                 goto bail;
 892         }
 893
 894         pci_read_config_word(dd->pcidev, pos + PCI_EXP_LNKSTA,
 895                              &linkstat);
 896         /*
 897          * speed is bits 0-4, linkwidth is bits 4-8
 898          * no defines for them in headers
 899          */
 900         speed = linkstat & 0xf;
 901         linkstat >>= 4;
 902         linkstat &= 0x1f;
 903         dd->ipath_lbus_width = linkstat;
 904
 905         switch (speed) {
 906         case 1:
 907                 dd->ipath_lbus_speed = 2500; /* Gen1, 2.5GHz */
 908                 break;
 909         case 2:
 910                 dd->ipath_lbus_speed = 5000; /* Gen1, 5GHz */
 911                 break;
 912         default: /* not defined, assume gen1 */
 913                 dd->ipath_lbus_speed = 2500;
 914                 break;
 915         }
 916
 917         if (linkstat < 8)
 918                 ipath_dev_err(dd,
 919                         "PCIe width %u (x8 HCA), performance reduced\n",
 920                         linkstat);
 921         else
 922                 ipath_cdbg(VERBOSE, "PCIe speed %u width %u (x8 HCA)\n",
 923                         dd->ipath_lbus_speed, linkstat);
 924
 925         if (speed != 1)
 926                 ipath_dev_err(dd,
 927                         "PCIe linkspeed %u is incorrect; "
 928                         "should be 1 (2500)!\n", speed);
 929 bail:
 930         /* fill in string, even on errors */
 931         snprintf(dd->ipath_lbus_info, sizeof(dd->ipath_lbus_info),
 932                 "PCIe,%uMHz,x%u\n",
 933                 dd->ipath_lbus_speed,
 934                 dd->ipath_lbus_width);
 935
 936         return;
 937 }
 938
 939 /**
 940  * ipath_setup_pe_config - setup PCIe config related stuff
 941  * @dd: the infinipath device
 942  * @pdev: the PCI device
 943  *
 944  * The pci_enable_msi() call will fail on systems with MSI quirks
 945  * such as those with AMD8131, even if the device of interest is not
 946  * attached to that device, (in the 2.6.13 - 2.6.15 kernels, at least, fixed
 947  * late in 2.6.16).
 948  * All that can be done is to edit the kernel source to remove the quirk
 949  * check until that is fixed.
 950  * We do not need to call enable_msi() for our HyperTransport chip,
 951  * even though it uses MSI, and we want to avoid the quirk warning, so
 952  * So we call enable_msi only for PCIe.  If we do end up needing
 953  * pci_enable_msi at some point in the future for HT, we'll move the
 954  * call back into the main init_one code.
 955  * We save the msi lo and hi values, so we can restore them after
 956  * chip reset (the kernel PCI infrastructure doesn't yet handle that
 957  * correctly).
 958  */
 959 static int ipath_setup_pe_config(struct ipath_devdata *dd,
 960                                  struct pci_dev *pdev)
 961 {
 962         int pos, ret;
 963
 964         dd->ipath_msi_lo = 0;   /* used as a flag during reset processing */
 965         ret = pci_enable_msi(dd->pcidev);
 966         if (ret)
 967                 ipath_dev_err(dd, "pci_enable_msi failed: %d, "
 968                               "interrupts may not work\n", ret);
 969         /* continue even if it fails, we may still be OK... */
 970         dd->ipath_irq = pdev->irq;
 971
 972         if ((pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
 973                 u16 control;
 974                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
 975                                       &dd->ipath_msi_lo);
 976                 pci_read_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
 977                                       &dd->ipath_msi_hi);
 978                 pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
 979                                      &control);
 980                 /* now save the data (vector) info */
 981                 pci_read_config_word(dd->pcidev,
 982                                      pos + ((control & PCI_MSI_FLAGS_64BIT)
 983                                             ? 12 : 8),
 984                                      &dd->ipath_msi_data);
 985                 ipath_cdbg(VERBOSE, "Read msi data 0x%x from config offset "
 986                            "0x%x, control=0x%x\n", dd->ipath_msi_data,
 987                            pos + ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
 988                            control);
 989                 /* we save the cachelinesize also, although it doesn't
 990                  * really matter */
 991                 pci_read_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
 992                                      &dd->ipath_pci_cacheline);
 993         } else
 994                 ipath_dev_err(dd, "Can't find MSI capability, "
 995                               "can't save MSI settings for reset\n");
 996
 997         ipath_6120_pcie_params(dd);
 998
 999         dd->ipath_link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
1000         dd->ipath_link_speed_supported = IPATH_IB_SDR;
1001         dd->ipath_link_width_enabled = IB_WIDTH_4X;
1002         dd->ipath_link_speed_enabled = dd->ipath_link_speed_supported;
1003         /* these can't change for this chip, so set once */
1004         dd->ipath_link_width_active = dd->ipath_link_width_enabled;
1005         dd->ipath_link_speed_active = dd->ipath_link_speed_enabled;
1006         return 0;
1007 }
1008
1009 static void ipath_init_pe_variables(struct ipath_devdata *dd)
1010 {
1011         /*
1012          * setup the register offsets, since they are different for each
1013          * chip
1014          */
1015         dd->ipath_kregs = &ipath_pe_kregs;
1016         dd->ipath_cregs = &ipath_pe_cregs;
1017
1018         /*
1019          * bits for selecting i2c direction and values,
1020          * used for I2C serial flash
1021          */
1022         dd->ipath_gpio_sda_num = _IPATH_GPIO_SDA_NUM;
1023         dd->ipath_gpio_scl_num = _IPATH_GPIO_SCL_NUM;
1024         dd->ipath_gpio_sda = IPATH_GPIO_SDA;
1025         dd->ipath_gpio_scl = IPATH_GPIO_SCL;
1026
1027         /*
1028          * Fill in data for field-values that change in newer chips.
1029          * We dynamically specify only the mask for LINKTRAININGSTATE
1030          * and only the shift for LINKSTATE, as they are the only ones
1031          * that change.  Also precalculate the 3 link states of interest
1032          * and the combined mask.
1033          */
1034         dd->ibcs_ls_shift = IBA6120_IBCS_LINKSTATE_SHIFT;
1035         dd->ibcs_lts_mask = IBA6120_IBCS_LINKTRAININGSTATE_MASK;
1036         dd->ibcs_mask = (INFINIPATH_IBCS_LINKSTATE_MASK <<
1037                 dd->ibcs_ls_shift) | dd->ibcs_lts_mask;
1038         dd->ib_init = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1039                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1040                 (INFINIPATH_IBCS_L_STATE_INIT << dd->ibcs_ls_shift);
1041         dd->ib_arm = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1042                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1043                 (INFINIPATH_IBCS_L_STATE_ARM << dd->ibcs_ls_shift);
1044         dd->ib_active = (INFINIPATH_IBCS_LT_STATE_LINKUP <<
1045                 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) |
1046                 (INFINIPATH_IBCS_L_STATE_ACTIVE << dd->ibcs_ls_shift);
1047
1048         /*
1049          * Fill in data for ibcc field-values that change in newer chips.
1050          * We dynamically specify only the mask for LINKINITCMD
1051          * and only the shift for LINKCMD and MAXPKTLEN, as they are
1052          * the only ones that change.
1053          */
1054         dd->ibcc_lic_mask = INFINIPATH_IBCC_LINKINITCMD_MASK;
1055         dd->ibcc_lc_shift = INFINIPATH_IBCC_LINKCMD_SHIFT;
1056         dd->ibcc_mpl_shift = INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
1057
1058         /* Fill in shifts for RcvCtrl. */
1059         dd->ipath_r_portenable_shift = INFINIPATH_R_PORTENABLE_SHIFT;
1060         dd->ipath_r_intravail_shift = INFINIPATH_R_INTRAVAIL_SHIFT;
1061         dd->ipath_r_tailupd_shift = INFINIPATH_R_TAILUPD_SHIFT;
1062         dd->ipath_r_portcfg_shift = 0; /* Not on IBA6120 */
1063
1064         /* variables for sanity checking interrupt and errors */
1065         dd->ipath_hwe_bitsextant =
1066                 (INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1067                  INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT) |
1068                 (INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1069                  INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT) |
1070                 (INFINIPATH_HWE_PCIEMEMPARITYERR_MASK <<
1071                  INFINIPATH_HWE_PCIEMEMPARITYERR_SHIFT) |
1072                 INFINIPATH_HWE_PCIE1PLLFAILED |
1073                 INFINIPATH_HWE_PCIE0PLLFAILED |
1074                 INFINIPATH_HWE_PCIEPOISONEDTLP |
1075                 INFINIPATH_HWE_PCIECPLTIMEOUT |
1076                 INFINIPATH_HWE_PCIEBUSPARITYXTLH |
1077                 INFINIPATH_HWE_PCIEBUSPARITYXADM |
1078                 INFINIPATH_HWE_PCIEBUSPARITYRADM |
1079                 INFINIPATH_HWE_MEMBISTFAILED |
1080                 INFINIPATH_HWE_COREPLL_FBSLIP |
1081                 INFINIPATH_HWE_COREPLL_RFSLIP |
1082                 INFINIPATH_HWE_SERDESPLLFAILED |
1083                 INFINIPATH_HWE_IBCBUSTOSPCPARITYERR |
1084                 INFINIPATH_HWE_IBCBUSFRSPCPARITYERR;
1085         dd->ipath_i_bitsextant =
1086                 (INFINIPATH_I_RCVURG_MASK << INFINIPATH_I_RCVURG_SHIFT) |
1087                 (INFINIPATH_I_RCVAVAIL_MASK <<
1088                  INFINIPATH_I_RCVAVAIL_SHIFT) |
1089                 INFINIPATH_I_ERROR | INFINIPATH_I_SPIOSENT |
1090                 INFINIPATH_I_SPIOBUFAVAIL | INFINIPATH_I_GPIO;
1091         dd->ipath_e_bitsextant =
1092                 INFINIPATH_E_RFORMATERR | INFINIPATH_E_RVCRC |
1093                 INFINIPATH_E_RICRC | INFINIPATH_E_RMINPKTLEN |
1094                 INFINIPATH_E_RMAXPKTLEN | INFINIPATH_E_RLONGPKTLEN |
1095                 INFINIPATH_E_RSHORTPKTLEN | INFINIPATH_E_RUNEXPCHAR |
1096                 INFINIPATH_E_RUNSUPVL | INFINIPATH_E_REBP |
1097                 INFINIPATH_E_RIBFLOW | INFINIPATH_E_RBADVERSION |
1098                 INFINIPATH_E_RRCVEGRFULL | INFINIPATH_E_RRCVHDRFULL |
1099                 INFINIPATH_E_RBADTID | INFINIPATH_E_RHDRLEN |
1100                 INFINIPATH_E_RHDR | INFINIPATH_E_RIBLOSTLINK |
1101                 INFINIPATH_E_SMINPKTLEN | INFINIPATH_E_SMAXPKTLEN |
1102                 INFINIPATH_E_SUNDERRUN | INFINIPATH_E_SPKTLEN |
1103                 INFINIPATH_E_SDROPPEDSMPPKT | INFINIPATH_E_SDROPPEDDATAPKT |
1104                 INFINIPATH_E_SPIOARMLAUNCH | INFINIPATH_E_SUNEXPERRPKTNUM |
1105                 INFINIPATH_E_SUNSUPVL | INFINIPATH_E_IBSTATUSCHANGED |
1106                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET |
1107                 INFINIPATH_E_HARDWARE;
1108
1109         dd->ipath_i_rcvavail_mask = INFINIPATH_I_RCVAVAIL_MASK;
1110         dd->ipath_i_rcvurg_mask = INFINIPATH_I_RCVURG_MASK;
1111         dd->ipath_i_rcvavail_shift = INFINIPATH_I_RCVAVAIL_SHIFT;
1112         dd->ipath_i_rcvurg_shift = INFINIPATH_I_RCVURG_SHIFT;
1113
1114         /*
1115          * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
1116          * 2 is Some Misc, 3 is reserved for future.
1117          */
1118         dd->ipath_eep_st_masks[0].hwerrs_to_log =
1119                 INFINIPATH_HWE_TXEMEMPARITYERR_MASK <<
1120                 INFINIPATH_HWE_TXEMEMPARITYERR_SHIFT;
1121
1122         /* Ignore errors in PIO/PBC on systems with unordered write-combining */
1123         if (ipath_unordered_wc())
1124                 dd->ipath_eep_st_masks[0].hwerrs_to_log &= ~TXE_PIO_PARITY;
1125
1126         dd->ipath_eep_st_masks[1].hwerrs_to_log =
1127                 INFINIPATH_HWE_RXEMEMPARITYERR_MASK <<
1128                 INFINIPATH_HWE_RXEMEMPARITYERR_SHIFT;
1129
1130         dd->ipath_eep_st_masks[2].errs_to_log =
1131                 INFINIPATH_E_INVALIDADDR | INFINIPATH_E_RESET;
1132
1133
1134         dd->delay_mult = 2; /* SDR, 4X, can't change */
1135 }
1136
1137 /* setup the MSI stuff again after a reset.  I'd like to just call
1138  * pci_enable_msi() and request_irq() again, but when I do that,
1139  * the MSI enable bit doesn't get set in the command word, and
1140  * we switch to to a different interrupt vector, which is confusing,
1141  * so I instead just do it all inline.  Perhaps somehow can tie this
1142  * into the PCIe hotplug support at some point
1143  * Note, because I'm doing it all here, I don't call pci_disable_msi()
1144  * or free_irq() at the start of ipath_setup_pe_reset().
1145  */
1146 static int ipath_reinit_msi(struct ipath_devdata *dd)
1147 {
1148         int pos;
1149         u16 control;
1150         int ret;
1151
1152         if (!dd->ipath_msi_lo) {
1153                 dev_info(&dd->pcidev->dev, "Can't restore MSI config, "
1154                          "initial setup failed?\n");
1155                 ret = 0;
1156                 goto bail;
1157         }
1158
1159         if (!(pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI))) {
1160                 ipath_dev_err(dd, "Can't find MSI capability, "
1161                               "can't restore MSI settings\n");
1162                 ret = 0;
1163                 goto bail;
1164         }
1165         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1166                    dd->ipath_msi_lo, pos + PCI_MSI_ADDRESS_LO);
1167         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_LO,
1168                                dd->ipath_msi_lo);
1169         ipath_cdbg(VERBOSE, "Writing msi_lo 0x%x to config offset 0x%x\n",
1170                    dd->ipath_msi_hi, pos + PCI_MSI_ADDRESS_HI);
1171         pci_write_config_dword(dd->pcidev, pos + PCI_MSI_ADDRESS_HI,
1172                                dd->ipath_msi_hi);
1173         pci_read_config_word(dd->pcidev, pos + PCI_MSI_FLAGS, &control);
1174         if (!(control & PCI_MSI_FLAGS_ENABLE)) {
1175                 ipath_cdbg(VERBOSE, "MSI control at off %x was %x, "
1176                            "setting MSI enable (%x)\n", pos + PCI_MSI_FLAGS,
1177                            control, control | PCI_MSI_FLAGS_ENABLE);
1178                 control |= PCI_MSI_FLAGS_ENABLE;
1179                 pci_write_config_word(dd->pcidev, pos + PCI_MSI_FLAGS,
1180                                       control);
1181         }
1182         /* now rewrite the data (vector) info */
1183         pci_write_config_word(dd->pcidev, pos +
1184                               ((control & PCI_MSI_FLAGS_64BIT) ? 12 : 8),
1185                               dd->ipath_msi_data);
1186         /* we restore the cachelinesize also, although it doesn't really
1187          * matter */
1188         pci_write_config_byte(dd->pcidev, PCI_CACHE_LINE_SIZE,
1189                               dd->ipath_pci_cacheline);
1190         /* and now set the pci master bit again */
1191         pci_set_master(dd->pcidev);
1192         ret = 1;
1193
1194 bail:
1195         return ret;
1196 }
1197
1198 /* This routine sleeps, so it can only be called from user context, not
1199  * from interrupt context.  If we need interrupt context, we can split
1200  * it into two routines.
1201 */
1202 static int ipath_setup_pe_reset(struct ipath_devdata *dd)
1203 {
1204         u64 val;
1205         int i;
1206         int ret;
1207
1208         /* Use ERROR so it shows up in logs, etc. */
1209         ipath_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->ipath_unit);
1210         /* keep chip from being accessed in a few places */
1211         dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT);
1212         val = dd->ipath_control | INFINIPATH_C_RESET;
1213         ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
1214         mb();
1215
1216         for (i = 1; i <= 5; i++) {
1217                 int r;
1218                 /* allow MBIST, etc. to complete; longer on each retry.
1219                  * We sometimes get machine checks from bus timeout if no
1220                  * response, so for now, make it *really* long.
1221                  */
1222                 msleep(1000 + (1 + i) * 2000);
1223                 if ((r =
1224                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
1225                                             dd->ipath_pcibar0)))
1226                         ipath_dev_err(dd, "rewrite of BAR0 failed: %d\n",
1227                                       r);
1228                 if ((r =
1229                      pci_write_config_dword(dd->pcidev, PCI_BASE_ADDRESS_1,
1230                                             dd->ipath_pcibar1)))
1231                         ipath_dev_err(dd, "rewrite of BAR1 failed: %d\n",
1232                                       r);
1233                 /* now re-enable memory access */
1234                 if ((r = pci_enable_device(dd->pcidev)))
1235                         ipath_dev_err(dd, "pci_enable_device failed after "
1236                                       "reset: %d\n", r);
1237                 /* whether it worked or not, mark as present, again */
1238                 dd->ipath_flags |= IPATH_PRESENT;
1239                 val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
1240                 if (val == dd->ipath_revision) {
1241                         ipath_cdbg(VERBOSE, "Got matching revision "
1242                                    "register %llx on try %d\n",
1243                                    (unsigned long long) val, i);
1244                         ret = ipath_reinit_msi(dd);
1245                         goto bail;
1246                 }
1247                 /* Probably getting -1 back */
1248                 ipath_dbg("Didn't get expected revision register, "
1249                           "got %llx, try %d\n", (unsigned long long) val,
1250                           i + 1);
1251         }
1252         ret = 0; /* failed */
1253
1254 bail:
1255         if (ret)
1256                 ipath_6120_pcie_params(dd);
1257         return ret;
1258 }
1259
1260 /**
1261  * ipath_pe_put_tid - write a TID in chip
1262  * @dd: the infinipath device
1263  * @tidptr: pointer to the expected TID (in chip) to udpate
1264  * @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0) for expected
1265  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1266  *
1267  * This exists as a separate routine to allow for special locking etc.
1268  * It's used for both the full cleanup on exit, as well as the normal
1269  * setup and teardown.
1270  */
1271 static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
1272                              u32 type, unsigned long pa)
1273 {
1274         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1275         unsigned long flags = 0; /* keep gcc quiet */
1276
1277         if (pa != dd->ipath_tidinvalid) {
1278                 if (pa & ((1U << 11) - 1)) {
1279                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1280                                  "not 2KB aligned!\n", pa);
1281                         return;
1282                 }
1283                 pa >>= 11;
1284                 /* paranoia check */
1285                 if (pa & ~INFINIPATH_RT_ADDR_MASK)
1286                         ipath_dev_err(dd,
1287                                       "BUG: Physical page address 0x%lx "
1288                                       "has bits set in 31-29\n", pa);
1289
1290                 if (type == RCVHQ_RCV_TYPE_EAGER)
1291                         pa |= dd->ipath_tidtemplate;
1292                 else /* for now, always full 4KB page */
1293                         pa |= 2 << 29;
1294         }
1295
1296         /*
1297          * Workaround chip bug 9437 by writing the scratch register
1298          * before and after the TID, and with an io write barrier.
1299          * We use a spinlock around the writes, so they can't intermix
1300          * with other TID (eager or expected) writes (the chip bug
1301          * is triggered by back to back TID writes). Unfortunately, this
1302          * call can be done from interrupt level for the port 0 eager TIDs,
1303          * so we have to use irqsave locks.
1304          */
1305         spin_lock_irqsave(&dd->ipath_tid_lock, flags);
1306         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xfeeddeaf);
1307         if (dd->ipath_kregbase)
1308                 writel(pa, tidp32);
1309         ipath_write_kreg(dd, dd->ipath_kregs->kr_scratch, 0xdeadbeef);
1310         mmiowb();
1311         spin_unlock_irqrestore(&dd->ipath_tid_lock, flags);
1312 }
1313 /**
1314  * ipath_pe_put_tid_2 - write a TID in chip, Revision 2 or higher
1315  * @dd: the infinipath device
1316  * @tidptr: pointer to the expected TID (in chip) to udpate
1317  * @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0) for expected
1318  * @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
1319  *
1320  * This exists as a separate routine to allow for selection of the
1321  * appropriate "flavor". The static calls in cleanup just use the
1322  * revision-agnostic form, as they are not performance critical.
1323  */
1324 static void ipath_pe_put_tid_2(struct ipath_devdata *dd, u64 __iomem *tidptr,
1325                              u32 type, unsigned long pa)
1326 {
1327         u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
1328
1329         if (pa != dd->ipath_tidinvalid) {
1330                 if (pa & ((1U << 11) - 1)) {
1331                         dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
1332                                  "not 2KB aligned!\n", pa);
1333                         return;
1334                 }
1335                 pa >>= 11;
1336                 /* paranoia check */
1337                 if (pa & ~INFINIPATH_RT_ADDR_MASK)
1338                         ipath_dev_err(dd,
1339                                       "BUG: Physical page address 0x%lx "
1340                                       "has bits set in 31-29\n", pa);
1341
1342                 if (type == RCVHQ_RCV_TYPE_EAGER)
1343                         pa |= dd->ipath_tidtemplate;
1344                 else /* for now, always full 4KB page */
1345                         pa |= 2 << 29;
1346         }
1347         if (dd->ipath_kregbase)
1348                 writel(pa, tidp32);
1349         mmiowb();
1350 }
1351
1352
1353 /**
1354  * ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
1355  * @dd: the infinipath device
1356  * @port: the port
1357  *
1358  * clear all TID entries for a port, expected and eager.
1359  * Used from ipath_close().  On this chip, TIDs are only 32 bits,
1360  * not 64, but they are still on 64 bit boundaries, so tidbase
1361  * is declared as u64 * for the pointer math, even though we write 32 bits
1362  */
1363 static void ipath_pe_clear_tids(struct ipath_devdata *dd, unsigned port)
1364 {
1365         u64 __iomem *tidbase;
1366         unsigned long tidinv;
1367         int i;
1368
1369         if (!dd->ipath_kregbase)
1370                 return;
1371
1372         ipath_cdbg(VERBOSE, "Invalidate TIDs for port %u\n", port);
1373
1374         tidinv = dd->ipath_tidinvalid;
1375         tidbase = (u64 __iomem *)
1376                 ((char __iomem *)(dd->ipath_kregbase) +
1377                  dd->ipath_rcvtidbase +
1378                  port * dd->ipath_rcvtidcnt * sizeof(*tidbase));
1379
1380         for (i = 0; i < dd->ipath_rcvtidcnt; i++)
1381                 dd->ipath_f_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
1382                                  tidinv);
1383
1384         tidbase = (u64 __iomem *)
1385                 ((char __iomem *)(dd->ipath_kregbase) +
1386                  dd->ipath_rcvegrbase +
1387                  port * dd->ipath_rcvegrcnt * sizeof(*tidbase));
1388
1389         for (i = 0; i < dd->ipath_rcvegrcnt; i++)
1390                 dd->ipath_f_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
1391                                  tidinv);
1392 }
1393
1394 /**
1395  * ipath_pe_tidtemplate - setup constants for TID updates
1396  * @dd: the infinipath device
1397  *
1398  * We setup stuff that we use a lot, to avoid calculating each time
1399  */
1400 static void ipath_pe_tidtemplate(struct ipath_devdata *dd)
1401 {
1402         u32 egrsize = dd->ipath_rcvegrbufsize;
1403
1404         /* For now, we always allocate 4KB buffers (at init) so we can
1405          * receive max size packets.  We may want a module parameter to
1406          * specify 2KB or 4KB and/or make be per port instead of per device
1407          * for those who want to reduce memory footprint.  Note that the
1408          * ipath_rcvhdrentsize size must be large enough to hold the largest
1409          * IB header (currently 96 bytes) that we expect to handle (plus of
1410          * course the 2 dwords of RHF).
1411          */
1412         if (egrsize == 2048)
1413                 dd->ipath_tidtemplate = 1U << 29;
1414         else if (egrsize == 4096)
1415                 dd->ipath_tidtemplate = 2U << 29;
1416         else {
1417                 egrsize = 4096;
1418                 dev_info(&dd->pcidev->dev, "BUG: unsupported egrbufsize "
1419                          "%u, using %u\n", dd->ipath_rcvegrbufsize,
1420                          egrsize);
1421                 dd->ipath_tidtemplate = 2U << 29;
1422         }
1423         dd->ipath_tidinvalid = 0;
1424 }
1425
1426 static int ipath_pe_early_init(struct ipath_devdata *dd)
1427 {
1428         dd->ipath_flags |= IPATH_4BYTE_TID;
1429         if (ipath_unordered_wc())
1430                 dd->ipath_flags |= IPATH_PIO_FLUSH_WC;
1431
1432         /*
1433          * For openfabrics, we need to be able to handle an IB header of
1434          * 24 dwords.  HT chip has arbitrary sized receive buffers, so we
1435          * made them the same size as the PIO buffers.  This chip does not
1436          * handle arbitrary size buffers, so we need the header large enough
1437          * to handle largest IB header, but still have room for a 2KB MTU
1438          * standard IB packet.
1439          */
1440         dd->ipath_rcvhdrentsize = 24;
1441         dd->ipath_rcvhdrsize = IPATH_DFLT_RCVHDRSIZE;
1442         dd->ipath_rhf_offset = 0;
1443         dd->ipath_egrtidbase = (u64 __iomem *)
1444                 ((char __iomem *) dd->ipath_kregbase + dd->ipath_rcvegrbase);
1445
1446         dd->ipath_rcvegrbufsize = ipath_mtu4096 ? 4096 : 2048;
1447         /*
1448          * the min() check here is currently a nop, but it may not always
1449          * be, depending on just how we do ipath_rcvegrbufsize
1450          */
1451         dd->ipath_ibmaxlen = min(ipath_mtu4096 ? dd->ipath_piosize4k :
1452                                  dd->ipath_piosize2k,
1453                                  dd->ipath_rcvegrbufsize +
1454                                  (dd->ipath_rcvhdrentsize << 2));
1455         dd->ipath_init_ibmaxlen = dd->ipath_ibmaxlen;
1456
1457         /*
1458          * We can request a receive interrupt for 1 or
1459          * more packets from current offset.  For now, we set this
1460          * up for a single packet.
1461          */
1462         dd->ipath_rhdrhead_intr_off = 1ULL<<32;
1463
1464         ipath_get_eeprom_info(dd);
1465
1466         return 0;
1467 }
1468
1469 int __attribute__((weak)) ipath_unordered_wc(void)
1470 {
1471         return 0;
1472 }
1473
1474 /**
1475  * ipath_init_pe_get_base_info - set chip-specific flags for user code
1476  * @pd: the infinipath port
1477  * @kbase: ipath_base_info pointer
1478  *
1479  * We set the PCIE flag because the lower bandwidth on PCIe vs
1480  * HyperTransport can affect some user packet algorithms.
1481  */
1482 static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
1483 {
1484         struct ipath_base_info *kinfo = kbase;
1485         struct ipath_devdata *dd;
1486
1487         if (ipath_unordered_wc()) {
1488                 kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
1489                 ipath_cdbg(PROC, "Intel processor, forcing WC order\n");
1490         }
1491         else
1492                 ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");
1493
1494         if (pd == NULL)
1495                 goto done;
1496
1497         dd = pd->port_dd;
1498
1499 done:
1500         kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE |
1501                 IPATH_RUNTIME_FORCE_PIOAVAIL | IPATH_RUNTIME_PIO_REGSWAPPED;
1502         return 0;
1503 }
1504
1505 static void ipath_pe_free_irq(struct ipath_devdata *dd)
1506 {
1507         free_irq(dd->ipath_irq, dd);
1508         dd->ipath_irq = 0;
1509 }
1510
1511
1512 static struct ipath_message_header *
1513 ipath_pe_get_msgheader(struct ipath_devdata *dd, __le32 *rhf_addr)
1514 {
1515         return (struct ipath_message_header *)
1516                 &rhf_addr[sizeof(u64) / sizeof(u32)];
1517 }
1518
1519 static void ipath_pe_config_ports(struct ipath_devdata *dd, ushort cfgports)
1520 {
1521         dd->ipath_portcnt =
1522                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
1523         dd->ipath_p0_rcvegrcnt =
1524                 ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
1525 }
1526
1527 static void ipath_pe_read_counters(struct ipath_devdata *dd,
1528                                    struct infinipath_counters *cntrs)
1529 {
1530         cntrs->LBIntCnt =
1531                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBIntCnt));
1532         cntrs->LBFlowStallCnt =
1533                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(LBFlowStallCnt));
1534         cntrs->TxSDmaDescCnt = 0;
1535         cntrs->TxUnsupVLErrCnt =
1536                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnsupVLErrCnt));
1537         cntrs->TxDataPktCnt =
1538                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDataPktCnt));
1539         cntrs->TxFlowPktCnt =
1540                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowPktCnt));
1541         cntrs->TxDwordCnt =
1542                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDwordCnt));
1543         cntrs->TxLenErrCnt =
1544                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxLenErrCnt));
1545         cntrs->TxMaxMinLenErrCnt =
1546                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxMaxMinLenErrCnt));
1547         cntrs->TxUnderrunCnt =
1548                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxUnderrunCnt));
1549         cntrs->TxFlowStallCnt =
1550                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxFlowStallCnt));
1551         cntrs->TxDroppedPktCnt =
1552                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(TxDroppedPktCnt));
1553         cntrs->RxDroppedPktCnt =
1554                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDroppedPktCnt));
1555         cntrs->RxDataPktCnt =
1556                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDataPktCnt));
1557         cntrs->RxFlowPktCnt =
1558                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowPktCnt));
1559         cntrs->RxDwordCnt =
1560                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxDwordCnt));
1561         cntrs->RxLenErrCnt =
1562                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLenErrCnt));
1563         cntrs->RxMaxMinLenErrCnt =
1564                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxMaxMinLenErrCnt));
1565         cntrs->RxICRCErrCnt =
1566                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxICRCErrCnt));
1567         cntrs->RxVCRCErrCnt =
1568                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxVCRCErrCnt));
1569         cntrs->RxFlowCtrlErrCnt =
1570                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxFlowCtrlErrCnt));
1571         cntrs->RxBadFormatCnt =
1572                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBadFormatCnt));
1573         cntrs->RxLinkProblemCnt =
1574                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLinkProblemCnt));
1575         cntrs->RxEBPCnt =
1576                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxEBPCnt));
1577         cntrs->RxLPCRCErrCnt =
1578                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxLPCRCErrCnt));
1579         cntrs->RxBufOvflCnt =
1580                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxBufOvflCnt));
1581         cntrs->RxTIDFullErrCnt =
1582                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDFullErrCnt));
1583         cntrs->RxTIDValidErrCnt =
1584                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxTIDValidErrCnt));
1585         cntrs->RxPKeyMismatchCnt =
1586                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxPKeyMismatchCnt));
1587         cntrs->RxP0HdrEgrOvflCnt =
1588                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP0HdrEgrOvflCnt));
1589         cntrs->RxP1HdrEgrOvflCnt =
1590                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP1HdrEgrOvflCnt));
1591         cntrs->RxP2HdrEgrOvflCnt =
1592                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP2HdrEgrOvflCnt));
1593         cntrs->RxP3HdrEgrOvflCnt =
1594                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP3HdrEgrOvflCnt));
1595         cntrs->RxP4HdrEgrOvflCnt =
1596                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(RxP4HdrEgrOvflCnt));
1597         cntrs->RxP5HdrEgrOvflCnt = 0;
1598         cntrs->RxP6HdrEgrOvflCnt = 0;
1599         cntrs->RxP7HdrEgrOvflCnt = 0;
1600         cntrs->RxP8HdrEgrOvflCnt = 0;
1601         cntrs->RxP9HdrEgrOvflCnt = 0;
1602         cntrs->RxP10HdrEgrOvflCnt = 0;
1603         cntrs->RxP11HdrEgrOvflCnt = 0;
1604         cntrs->RxP12HdrEgrOvflCnt = 0;
1605         cntrs->RxP13HdrEgrOvflCnt = 0;
1606         cntrs->RxP14HdrEgrOvflCnt = 0;
1607         cntrs->RxP15HdrEgrOvflCnt = 0;
1608         cntrs->RxP16HdrEgrOvflCnt = 0;
1609         cntrs->IBStatusChangeCnt =
1610                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBStatusChangeCnt));
1611         cntrs->IBLinkErrRecoveryCnt =
1612                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkErrRecoveryCnt));
1613         cntrs->IBLinkDownedCnt =
1614                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBLinkDownedCnt));
1615         cntrs->IBSymbolErrCnt =
1616                 ipath_snap_cntr(dd, IPATH_CREG_OFFSET(IBSymbolErrCnt));
1617         cntrs->RxVL15DroppedPktCnt = 0;
1618         cntrs->RxOtherLocalPhyErrCnt = 0;
1619         cntrs->PcieRetryBufDiagQwordCnt = 0;
1620         cntrs->ExcessBufferOvflCnt = dd->ipath_overrun_thresh_errs;
1621         cntrs->LocalLinkIntegrityErrCnt = dd->ipath_lli_errs;
1622         cntrs->RxVlErrCnt = 0;
1623         cntrs->RxDlidFltrCnt = 0;
1624 }
1625
1626
1627 /* no interrupt fallback for these chips */
1628 static int ipath_pe_nointr_fallback(struct ipath_devdata *dd)
1629 {
1630         return 0;
1631 }
1632
1633
1634 /*
1635  * reset the XGXS (between serdes and IBC).  Slightly less intrusive
1636  * than resetting the IBC or external link state, and useful in some
1637  * cases to cause some retraining.  To do this right, we reset IBC
1638  * as well.
1639  */
1640 static void ipath_pe_xgxs_reset(struct ipath_devdata *dd)
1641 {
1642         u64 val, prev_val;
1643
1644         prev_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
1645         val = prev_val | INFINIPATH_XGXS_RESET;
1646         prev_val &= ~INFINIPATH_XGXS_RESET; /* be sure */
1647         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
1648                          dd->ipath_control & ~INFINIPATH_C_LINKENABLE);
1649         ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
1650         ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
1651         ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, prev_val);
1652         ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
1653                          dd->ipath_control);
1654 }
1655
1656
1657 static int ipath_pe_get_ib_cfg(struct ipath_devdata *dd, int which)
1658 {
1659         int ret;
1660
1661         switch (which) {
1662         case IPATH_IB_CFG_LWID:
1663                 ret = dd->ipath_link_width_active;
1664                 break;
1665         case IPATH_IB_CFG_SPD:
1666                 ret = dd->ipath_link_speed_active;
1667                 break;
1668         case IPATH_IB_CFG_LWID_ENB:
1669                 ret = dd->ipath_link_width_enabled;
1670                 break;
1671         case IPATH_IB_CFG_SPD_ENB:
1672                 ret = dd->ipath_link_speed_enabled;
1673                 break;
1674         default:
1675                 ret =  -ENOTSUPP;
1676                 break;
1677         }
1678         return ret;
1679 }
1680
1681
1682 /* we assume range checking is already done, if needed */
1683 static int ipath_pe_set_ib_cfg(struct ipath_devdata *dd, int which, u32 val)
1684 {
1685         int ret = 0;
1686
1687         if (which == IPATH_IB_CFG_LWID_ENB)
1688                 dd->ipath_link_width_enabled = val;
1689         else if (which == IPATH_IB_CFG_SPD_ENB)
1690                 dd->ipath_link_speed_enabled = val;
1691         else
1692                 ret = -ENOTSUPP;
1693         return ret;
1694 }
1695
1696 static void ipath_pe_config_jint(struct ipath_devdata *dd, u16 a, u16 b)
1697 {
1698 }
1699
1700
1701 static int ipath_pe_ib_updown(struct ipath_devdata *dd, int ibup, u64 ibcs)
1702 {
1703         ipath_setup_pe_setextled(dd, ipath_ib_linkstate(dd, ibcs),
1704                 ipath_ib_linktrstate(dd, ibcs));
1705         return 0;
1706 }
1707
1708
1709 /**
1710  * ipath_init_iba6120_funcs - set up the chip-specific function pointers
1711  * @dd: the infinipath device
1712  *
1713  * This is global, and is called directly at init to set up the
1714  * chip-specific function pointers for later use.
1715  */
1716 void ipath_init_iba6120_funcs(struct ipath_devdata *dd)
1717 {
1718         dd->ipath_f_intrsetup = ipath_pe_intconfig;
1719         dd->ipath_f_bus = ipath_setup_pe_config;
1720         dd->ipath_f_reset = ipath_setup_pe_reset;
1721         dd->ipath_f_get_boardname = ipath_pe_boardname;
1722         dd->ipath_f_init_hwerrors = ipath_pe_init_hwerrors;
1723         dd->ipath_f_early_init = ipath_pe_early_init;
1724         dd->ipath_f_handle_hwerrors = ipath_pe_handle_hwerrors;
1725         dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
1726         dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
1727         dd->ipath_f_clear_tids = ipath_pe_clear_tids;
1728         /*
1729          * _f_put_tid may get changed after we read the chip revision,
1730          * but we start with the safe version for all revs
1731          */
1732         dd->ipath_f_put_tid = ipath_pe_put_tid;
1733         dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
1734         dd->ipath_f_setextled = ipath_setup_pe_setextled;
1735         dd->ipath_f_get_base_info = ipath_pe_get_base_info;
1736         dd->ipath_f_free_irq = ipath_pe_free_irq;
1737         dd->ipath_f_tidtemplate = ipath_pe_tidtemplate;
1738         dd->ipath_f_intr_fallback = ipath_pe_nointr_fallback;
1739         dd->ipath_f_xgxs_reset = ipath_pe_xgxs_reset;
1740         dd->ipath_f_get_msgheader = ipath_pe_get_msgheader;
1741         dd->ipath_f_config_ports = ipath_pe_config_ports;
1742         dd->ipath_f_read_counters = ipath_pe_read_counters;
1743         dd->ipath_f_get_ib_cfg = ipath_pe_get_ib_cfg;
1744         dd->ipath_f_set_ib_cfg = ipath_pe_set_ib_cfg;
1745         dd->ipath_f_config_jint = ipath_pe_config_jint;
1746         dd->ipath_f_ib_updown = ipath_pe_ib_updown;
1747
1748
1749         /* initialize chip-specific variables */
1750         ipath_init_pe_variables(dd);
1751 }
1752