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