kernel/drivers/infiniband/hw/qib/qib_iba7220.c

   1 /*
   2  * Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
   3  * All rights reserved.
   4  * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34 /*
  35  * This file contains all of the code that is specific to the
  36  * QLogic_IB 7220 chip (except that specific to the SerDes)
  37  */
  38
  39 #include <linux/interrupt.h>
  40 #include <linux/pci.h>
  41 #include <linux/delay.h>
  42 #include <linux/module.h>
  43 #include <linux/io.h>
  44 #include <rdma/ib_verbs.h>
  45
  46 #include "qib.h"
  47 #include "qib_7220.h"
  48
  49 static void qib_setup_7220_setextled(struct qib_pportdata *, u32);
  50 static void qib_7220_handle_hwerrors(struct qib_devdata *, char *, size_t);
  51 static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op);
  52 static u32 qib_7220_iblink_state(u64);
  53 static u8 qib_7220_phys_portstate(u64);
  54 static void qib_sdma_update_7220_tail(struct qib_pportdata *, u16);
  55 static void qib_set_ib_7220_lstate(struct qib_pportdata *, u16, u16);
  56
  57 /*
  58  * This file contains almost all the chip-specific register information and
  59  * access functions for the QLogic QLogic_IB 7220 PCI-Express chip, with the
  60  * exception of SerDes support, which in in qib_sd7220.c.
  61  */
  62
  63 /* Below uses machine-generated qib_chipnum_regs.h file */
  64 #define KREG_IDX(regname) (QIB_7220_##regname##_OFFS / sizeof(u64))
  65
  66 /* Use defines to tie machine-generated names to lower-case names */
  67 #define kr_control KREG_IDX(Control)
  68 #define kr_counterregbase KREG_IDX(CntrRegBase)
  69 #define kr_errclear KREG_IDX(ErrClear)
  70 #define kr_errmask KREG_IDX(ErrMask)
  71 #define kr_errstatus KREG_IDX(ErrStatus)
  72 #define kr_extctrl KREG_IDX(EXTCtrl)
  73 #define kr_extstatus KREG_IDX(EXTStatus)
  74 #define kr_gpio_clear KREG_IDX(GPIOClear)
  75 #define kr_gpio_mask KREG_IDX(GPIOMask)
  76 #define kr_gpio_out KREG_IDX(GPIOOut)
  77 #define kr_gpio_status KREG_IDX(GPIOStatus)
  78 #define kr_hrtbt_guid KREG_IDX(HRTBT_GUID)
  79 #define kr_hwdiagctrl KREG_IDX(HwDiagCtrl)
  80 #define kr_hwerrclear KREG_IDX(HwErrClear)
  81 #define kr_hwerrmask KREG_IDX(HwErrMask)
  82 #define kr_hwerrstatus KREG_IDX(HwErrStatus)
  83 #define kr_ibcctrl KREG_IDX(IBCCtrl)
  84 #define kr_ibcddrctrl KREG_IDX(IBCDDRCtrl)
  85 #define kr_ibcddrstatus KREG_IDX(IBCDDRStatus)
  86 #define kr_ibcstatus KREG_IDX(IBCStatus)
  87 #define kr_ibserdesctrl KREG_IDX(IBSerDesCtrl)
  88 #define kr_intclear KREG_IDX(IntClear)
  89 #define kr_intmask KREG_IDX(IntMask)
  90 #define kr_intstatus KREG_IDX(IntStatus)
  91 #define kr_ncmodectrl KREG_IDX(IBNCModeCtrl)
  92 #define kr_palign KREG_IDX(PageAlign)
  93 #define kr_partitionkey KREG_IDX(RcvPartitionKey)
  94 #define kr_portcnt KREG_IDX(PortCnt)
  95 #define kr_rcvbthqp KREG_IDX(RcvBTHQP)
  96 #define kr_rcvctrl KREG_IDX(RcvCtrl)
  97 #define kr_rcvegrbase KREG_IDX(RcvEgrBase)
  98 #define kr_rcvegrcnt KREG_IDX(RcvEgrCnt)
  99 #define kr_rcvhdrcnt KREG_IDX(RcvHdrCnt)
 100 #define kr_rcvhdrentsize KREG_IDX(RcvHdrEntSize)
 101 #define kr_rcvhdrsize KREG_IDX(RcvHdrSize)
 102 #define kr_rcvpktledcnt KREG_IDX(RcvPktLEDCnt)
 103 #define kr_rcvtidbase KREG_IDX(RcvTIDBase)
 104 #define kr_rcvtidcnt KREG_IDX(RcvTIDCnt)
 105 #define kr_revision KREG_IDX(Revision)
 106 #define kr_scratch KREG_IDX(Scratch)
 107 #define kr_sendbuffererror KREG_IDX(SendBufErr0)
 108 #define kr_sendctrl KREG_IDX(SendCtrl)
 109 #define kr_senddmabase KREG_IDX(SendDmaBase)
 110 #define kr_senddmabufmask0 KREG_IDX(SendDmaBufMask0)
 111 #define kr_senddmabufmask1 (KREG_IDX(SendDmaBufMask0) + 1)
 112 #define kr_senddmabufmask2 (KREG_IDX(SendDmaBufMask0) + 2)
 113 #define kr_senddmahead KREG_IDX(SendDmaHead)
 114 #define kr_senddmaheadaddr KREG_IDX(SendDmaHeadAddr)
 115 #define kr_senddmalengen KREG_IDX(SendDmaLenGen)
 116 #define kr_senddmastatus KREG_IDX(SendDmaStatus)
 117 #define kr_senddmatail KREG_IDX(SendDmaTail)
 118 #define kr_sendpioavailaddr KREG_IDX(SendBufAvailAddr)
 119 #define kr_sendpiobufbase KREG_IDX(SendBufBase)
 120 #define kr_sendpiobufcnt KREG_IDX(SendBufCnt)
 121 #define kr_sendpiosize KREG_IDX(SendBufSize)
 122 #define kr_sendregbase KREG_IDX(SendRegBase)
 123 #define kr_userregbase KREG_IDX(UserRegBase)
 124 #define kr_xgxs_cfg KREG_IDX(XGXSCfg)
 125
 126 /* These must only be written via qib_write_kreg_ctxt() */
 127 #define kr_rcvhdraddr KREG_IDX(RcvHdrAddr0)
 128 #define kr_rcvhdrtailaddr KREG_IDX(RcvHdrTailAddr0)
 129
 130
 131 #define CREG_IDX(regname) ((QIB_7220_##regname##_OFFS - \
 132                         QIB_7220_LBIntCnt_OFFS) / sizeof(u64))
 133
 134 #define cr_badformat CREG_IDX(RxVersionErrCnt)
 135 #define cr_erricrc CREG_IDX(RxICRCErrCnt)
 136 #define cr_errlink CREG_IDX(RxLinkMalformCnt)
 137 #define cr_errlpcrc CREG_IDX(RxLPCRCErrCnt)
 138 #define cr_errpkey CREG_IDX(RxPKeyMismatchCnt)
 139 #define cr_rcvflowctrl_err CREG_IDX(RxFlowCtrlViolCnt)
 140 #define cr_err_rlen CREG_IDX(RxLenErrCnt)
 141 #define cr_errslen CREG_IDX(TxLenErrCnt)
 142 #define cr_errtidfull CREG_IDX(RxTIDFullErrCnt)
 143 #define cr_errtidvalid CREG_IDX(RxTIDValidErrCnt)
 144 #define cr_errvcrc CREG_IDX(RxVCRCErrCnt)
 145 #define cr_ibstatuschange CREG_IDX(IBStatusChangeCnt)
 146 #define cr_lbint CREG_IDX(LBIntCnt)
 147 #define cr_invalidrlen CREG_IDX(RxMaxMinLenErrCnt)
 148 #define cr_invalidslen CREG_IDX(TxMaxMinLenErrCnt)
 149 #define cr_lbflowstall CREG_IDX(LBFlowStallCnt)
 150 #define cr_pktrcv CREG_IDX(RxDataPktCnt)
 151 #define cr_pktrcvflowctrl CREG_IDX(RxFlowPktCnt)
 152 #define cr_pktsend CREG_IDX(TxDataPktCnt)
 153 #define cr_pktsendflow CREG_IDX(TxFlowPktCnt)
 154 #define cr_portovfl CREG_IDX(RxP0HdrEgrOvflCnt)
 155 #define cr_rcvebp CREG_IDX(RxEBPCnt)
 156 #define cr_rcvovfl CREG_IDX(RxBufOvflCnt)
 157 #define cr_senddropped CREG_IDX(TxDroppedPktCnt)
 158 #define cr_sendstall CREG_IDX(TxFlowStallCnt)
 159 #define cr_sendunderrun CREG_IDX(TxUnderrunCnt)
 160 #define cr_wordrcv CREG_IDX(RxDwordCnt)
 161 #define cr_wordsend CREG_IDX(TxDwordCnt)
 162 #define cr_txunsupvl CREG_IDX(TxUnsupVLErrCnt)
 163 #define cr_rxdroppkt CREG_IDX(RxDroppedPktCnt)
 164 #define cr_iblinkerrrecov CREG_IDX(IBLinkErrRecoveryCnt)
 165 #define cr_iblinkdown CREG_IDX(IBLinkDownedCnt)
 166 #define cr_ibsymbolerr CREG_IDX(IBSymbolErrCnt)
 167 #define cr_vl15droppedpkt CREG_IDX(RxVL15DroppedPktCnt)
 168 #define cr_rxotherlocalphyerr CREG_IDX(RxOtherLocalPhyErrCnt)
 169 #define cr_excessbufferovfl CREG_IDX(ExcessBufferOvflCnt)
 170 #define cr_locallinkintegrityerr CREG_IDX(LocalLinkIntegrityErrCnt)
 171 #define cr_rxvlerr CREG_IDX(RxVlErrCnt)
 172 #define cr_rxdlidfltr CREG_IDX(RxDlidFltrCnt)
 173 #define cr_psstat CREG_IDX(PSStat)
 174 #define cr_psstart CREG_IDX(PSStart)
 175 #define cr_psinterval CREG_IDX(PSInterval)
 176 #define cr_psrcvdatacount CREG_IDX(PSRcvDataCount)
 177 #define cr_psrcvpktscount CREG_IDX(PSRcvPktsCount)
 178 #define cr_psxmitdatacount CREG_IDX(PSXmitDataCount)
 179 #define cr_psxmitpktscount CREG_IDX(PSXmitPktsCount)
 180 #define cr_psxmitwaitcount CREG_IDX(PSXmitWaitCount)
 181 #define cr_txsdmadesc CREG_IDX(TxSDmaDescCnt)
 182 #define cr_pcieretrydiag CREG_IDX(PcieRetryBufDiagQwordCnt)
 183
 184 #define SYM_RMASK(regname, fldname) ((u64)              \
 185         QIB_7220_##regname##_##fldname##_RMASK)
 186 #define SYM_MASK(regname, fldname) ((u64)               \
 187         QIB_7220_##regname##_##fldname##_RMASK <<       \
 188          QIB_7220_##regname##_##fldname##_LSB)
 189 #define SYM_LSB(regname, fldname) (QIB_7220_##regname##_##fldname##_LSB)
 190 #define SYM_FIELD(value, regname, fldname) ((u64) \
 191         (((value) >> SYM_LSB(regname, fldname)) & \
 192          SYM_RMASK(regname, fldname)))
 193 #define ERR_MASK(fldname) SYM_MASK(ErrMask, fldname##Mask)
 194 #define HWE_MASK(fldname) SYM_MASK(HwErrMask, fldname##Mask)
 195
 196 /* ibcctrl bits */
 197 #define QLOGIC_IB_IBCC_LINKINITCMD_DISABLE 1
 198 /* cycle through TS1/TS2 till OK */
 199 #define QLOGIC_IB_IBCC_LINKINITCMD_POLL 2
 200 /* wait for TS1, then go on */
 201 #define QLOGIC_IB_IBCC_LINKINITCMD_SLEEP 3
 202 #define QLOGIC_IB_IBCC_LINKINITCMD_SHIFT 16
 203
 204 #define QLOGIC_IB_IBCC_LINKCMD_DOWN 1           /* move to 0x11 */
 205 #define QLOGIC_IB_IBCC_LINKCMD_ARMED 2          /* move to 0x21 */
 206 #define QLOGIC_IB_IBCC_LINKCMD_ACTIVE 3 /* move to 0x31 */
 207
 208 #define BLOB_7220_IBCHG 0x81
 209
 210 /*
 211  * We could have a single register get/put routine, that takes a group type,
 212  * but this is somewhat clearer and cleaner.  It also gives us some error
 213  * checking.  64 bit register reads should always work, but are inefficient
 214  * on opteron (the northbridge always generates 2 separate HT 32 bit reads),
 215  * so we use kreg32 wherever possible.  User register and counter register
 216  * reads are always 32 bit reads, so only one form of those routines.
 217  */
 218
 219 /**
 220  * qib_read_ureg32 - read 32-bit virtualized per-context register
 221  * @dd: device
 222  * @regno: register number
 223  * @ctxt: context number
 224  *
 225  * Return the contents of a register that is virtualized to be per context.
 226  * Returns -1 on errors (not distinguishable from valid contents at
 227  * runtime; we may add a separate error variable at some point).
 228  */
 229 static inline u32 qib_read_ureg32(const struct qib_devdata *dd,
 230                                   enum qib_ureg regno, int ctxt)
 231 {
 232         if (!dd->kregbase || !(dd->flags & QIB_PRESENT))
 233                 return 0;
 234
 235         if (dd->userbase)
 236                 return readl(regno + (u64 __iomem *)
 237                              ((char __iomem *)dd->userbase +
 238                               dd->ureg_align * ctxt));
 239         else
 240                 return readl(regno + (u64 __iomem *)
 241                              (dd->uregbase +
 242                               (char __iomem *)dd->kregbase +
 243                               dd->ureg_align * ctxt));
 244 }
 245
 246 /**
 247  * qib_write_ureg - write 32-bit virtualized per-context register
 248  * @dd: device
 249  * @regno: register number
 250  * @value: value
 251  * @ctxt: context
 252  *
 253  * Write the contents of a register that is virtualized to be per context.
 254  */
 255 static inline void qib_write_ureg(const struct qib_devdata *dd,
 256                                   enum qib_ureg regno, u64 value, int ctxt)
 257 {
 258         u64 __iomem *ubase;
 259
 260         if (dd->userbase)
 261                 ubase = (u64 __iomem *)
 262                         ((char __iomem *) dd->userbase +
 263                          dd->ureg_align * ctxt);
 264         else
 265                 ubase = (u64 __iomem *)
 266                         (dd->uregbase +
 267                          (char __iomem *) dd->kregbase +
 268                          dd->ureg_align * ctxt);
 269
 270         if (dd->kregbase && (dd->flags & QIB_PRESENT))
 271                 writeq(value, &ubase[regno]);
 272 }
 273
 274 /**
 275  * qib_write_kreg_ctxt - write a device's per-ctxt 64-bit kernel register
 276  * @dd: the qlogic_ib device
 277  * @regno: the register number to write
 278  * @ctxt: the context containing the register
 279  * @value: the value to write
 280  */
 281 static inline void qib_write_kreg_ctxt(const struct qib_devdata *dd,
 282                                        const u16 regno, unsigned ctxt,
 283                                        u64 value)
 284 {
 285         qib_write_kreg(dd, regno + ctxt, value);
 286 }
 287
 288 static inline void write_7220_creg(const struct qib_devdata *dd,
 289                                    u16 regno, u64 value)
 290 {
 291         if (dd->cspec->cregbase && (dd->flags & QIB_PRESENT))
 292                 writeq(value, &dd->cspec->cregbase[regno]);
 293 }
 294
 295 static inline u64 read_7220_creg(const struct qib_devdata *dd, u16 regno)
 296 {
 297         if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
 298                 return 0;
 299         return readq(&dd->cspec->cregbase[regno]);
 300 }
 301
 302 static inline u32 read_7220_creg32(const struct qib_devdata *dd, u16 regno)
 303 {
 304         if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
 305                 return 0;
 306         return readl(&dd->cspec->cregbase[regno]);
 307 }
 308
 309 /* kr_revision bits */
 310 #define QLOGIC_IB_R_EMULATORREV_MASK ((1ULL << 22) - 1)
 311 #define QLOGIC_IB_R_EMULATORREV_SHIFT 40
 312
 313 /* kr_control bits */
 314 #define QLOGIC_IB_C_RESET (1U << 7)
 315
 316 /* kr_intstatus, kr_intclear, kr_intmask bits */
 317 #define QLOGIC_IB_I_RCVURG_MASK ((1ULL << 17) - 1)
 318 #define QLOGIC_IB_I_RCVURG_SHIFT 32
 319 #define QLOGIC_IB_I_RCVAVAIL_MASK ((1ULL << 17) - 1)
 320 #define QLOGIC_IB_I_RCVAVAIL_SHIFT 0
 321 #define QLOGIC_IB_I_SERDESTRIMDONE (1ULL << 27)
 322
 323 #define QLOGIC_IB_C_FREEZEMODE 0x00000002
 324 #define QLOGIC_IB_C_LINKENABLE 0x00000004
 325
 326 #define QLOGIC_IB_I_SDMAINT             0x8000000000000000ULL
 327 #define QLOGIC_IB_I_SDMADISABLED        0x4000000000000000ULL
 328 #define QLOGIC_IB_I_ERROR               0x0000000080000000ULL
 329 #define QLOGIC_IB_I_SPIOSENT            0x0000000040000000ULL
 330 #define QLOGIC_IB_I_SPIOBUFAVAIL        0x0000000020000000ULL
 331 #define QLOGIC_IB_I_GPIO                0x0000000010000000ULL
 332
 333 /* variables for sanity checking interrupt and errors */
 334 #define QLOGIC_IB_I_BITSEXTANT \
 335                 (QLOGIC_IB_I_SDMAINT | QLOGIC_IB_I_SDMADISABLED | \
 336                 (QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT) | \
 337                 (QLOGIC_IB_I_RCVAVAIL_MASK << \
 338                  QLOGIC_IB_I_RCVAVAIL_SHIFT) | \
 339                 QLOGIC_IB_I_ERROR | QLOGIC_IB_I_SPIOSENT | \
 340                 QLOGIC_IB_I_SPIOBUFAVAIL | QLOGIC_IB_I_GPIO | \
 341                 QLOGIC_IB_I_SERDESTRIMDONE)
 342
 343 #define IB_HWE_BITSEXTANT \
 344                (HWE_MASK(RXEMemParityErr) | \
 345                 HWE_MASK(TXEMemParityErr) | \
 346                 (QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK <<  \
 347                  QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) | \
 348                 QLOGIC_IB_HWE_PCIE1PLLFAILED | \
 349                 QLOGIC_IB_HWE_PCIE0PLLFAILED | \
 350                 QLOGIC_IB_HWE_PCIEPOISONEDTLP | \
 351                 QLOGIC_IB_HWE_PCIECPLTIMEOUT | \
 352                 QLOGIC_IB_HWE_PCIEBUSPARITYXTLH | \
 353                 QLOGIC_IB_HWE_PCIEBUSPARITYXADM | \
 354                 QLOGIC_IB_HWE_PCIEBUSPARITYRADM | \
 355                 HWE_MASK(PowerOnBISTFailed) |     \
 356                 QLOGIC_IB_HWE_COREPLL_FBSLIP | \
 357                 QLOGIC_IB_HWE_COREPLL_RFSLIP | \
 358                 QLOGIC_IB_HWE_SERDESPLLFAILED | \
 359                 HWE_MASK(IBCBusToSPCParityErr) | \
 360                 HWE_MASK(IBCBusFromSPCParityErr) | \
 361                 QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR | \
 362                 QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR | \
 363                 QLOGIC_IB_HWE_SDMAMEMREADERR | \
 364                 QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED | \
 365                 QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT | \
 366                 QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT | \
 367                 QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT | \
 368                 QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT | \
 369                 QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR | \
 370                 QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR | \
 371                 QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR | \
 372                 QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR)
 373
 374 #define IB_E_BITSEXTANT                                                 \
 375         (ERR_MASK(RcvFormatErr) | ERR_MASK(RcvVCRCErr) |                \
 376          ERR_MASK(RcvICRCErr) | ERR_MASK(RcvMinPktLenErr) |             \
 377          ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvLongPktLenErr) |       \
 378          ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvUnexpectedCharErr) | \
 379          ERR_MASK(RcvUnsupportedVLErr) | ERR_MASK(RcvEBPErr) |          \
 380          ERR_MASK(RcvIBFlowErr) | ERR_MASK(RcvBadVersionErr) |          \
 381          ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) |            \
 382          ERR_MASK(RcvBadTidErr) | ERR_MASK(RcvHdrLenErr) |              \
 383          ERR_MASK(RcvHdrErr) | ERR_MASK(RcvIBLostLinkErr) |             \
 384          ERR_MASK(SendSpecialTriggerErr) |                              \
 385          ERR_MASK(SDmaDisabledErr) | ERR_MASK(SendMinPktLenErr) |       \
 386          ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnderRunErr) |       \
 387          ERR_MASK(SendPktLenErr) | ERR_MASK(SendDroppedSmpPktErr) |     \
 388          ERR_MASK(SendDroppedDataPktErr) |                              \
 389          ERR_MASK(SendPioArmLaunchErr) |                                \
 390          ERR_MASK(SendUnexpectedPktNumErr) |                            \
 391          ERR_MASK(SendUnsupportedVLErr) | ERR_MASK(SendBufMisuseErr) |  \
 392          ERR_MASK(SDmaGenMismatchErr) | ERR_MASK(SDmaOutOfBoundErr) |   \
 393          ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) |      \
 394          ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) |           \
 395          ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) |           \
 396          ERR_MASK(SDmaUnexpDataErr) |                                   \
 397          ERR_MASK(IBStatusChanged) | ERR_MASK(InvalidAddrErr) |         \
 398          ERR_MASK(ResetNegated) | ERR_MASK(HardwareErr) |               \
 399          ERR_MASK(SDmaDescAddrMisalignErr) |                            \
 400          ERR_MASK(InvalidEEPCmd))
 401
 402 /* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
 403 #define QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK  0x00000000000000ffULL
 404 #define QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT 0
 405 #define QLOGIC_IB_HWE_PCIEPOISONEDTLP      0x0000000010000000ULL
 406 #define QLOGIC_IB_HWE_PCIECPLTIMEOUT       0x0000000020000000ULL
 407 #define QLOGIC_IB_HWE_PCIEBUSPARITYXTLH    0x0000000040000000ULL
 408 #define QLOGIC_IB_HWE_PCIEBUSPARITYXADM    0x0000000080000000ULL
 409 #define QLOGIC_IB_HWE_PCIEBUSPARITYRADM    0x0000000100000000ULL
 410 #define QLOGIC_IB_HWE_COREPLL_FBSLIP       0x0080000000000000ULL
 411 #define QLOGIC_IB_HWE_COREPLL_RFSLIP       0x0100000000000000ULL
 412 #define QLOGIC_IB_HWE_PCIE1PLLFAILED       0x0400000000000000ULL
 413 #define QLOGIC_IB_HWE_PCIE0PLLFAILED       0x0800000000000000ULL
 414 #define QLOGIC_IB_HWE_SERDESPLLFAILED      0x1000000000000000ULL
 415 /* specific to this chip */
 416 #define QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR         0x0000000000000040ULL
 417 #define QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR          0x0000000000000080ULL
 418 #define QLOGIC_IB_HWE_SDMAMEMREADERR              0x0000000010000000ULL
 419 #define QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED          0x2000000000000000ULL
 420 #define QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT   0x0100000000000000ULL
 421 #define QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT   0x0200000000000000ULL
 422 #define QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT   0x0400000000000000ULL
 423 #define QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT   0x0800000000000000ULL
 424 #define QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR       0x0000008000000000ULL
 425 #define QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR        0x0000004000000000ULL
 426 #define QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR 0x0000001000000000ULL
 427 #define QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR 0x0000002000000000ULL
 428
 429 #define IBA7220_IBCC_LINKCMD_SHIFT 19
 430
 431 /* kr_ibcddrctrl bits */
 432 #define IBA7220_IBC_DLIDLMC_MASK        0xFFFFFFFFUL
 433 #define IBA7220_IBC_DLIDLMC_SHIFT       32
 434
 435 #define IBA7220_IBC_HRTBT_MASK  (SYM_RMASK(IBCDDRCtrl, HRTBT_AUTO) | \
 436                                  SYM_RMASK(IBCDDRCtrl, HRTBT_ENB))
 437 #define IBA7220_IBC_HRTBT_SHIFT SYM_LSB(IBCDDRCtrl, HRTBT_ENB)
 438
 439 #define IBA7220_IBC_LANE_REV_SUPPORTED (1<<8)
 440 #define IBA7220_IBC_LREV_MASK   1
 441 #define IBA7220_IBC_LREV_SHIFT  8
 442 #define IBA7220_IBC_RXPOL_MASK  1
 443 #define IBA7220_IBC_RXPOL_SHIFT 7
 444 #define IBA7220_IBC_WIDTH_SHIFT 5
 445 #define IBA7220_IBC_WIDTH_MASK  0x3
 446 #define IBA7220_IBC_WIDTH_1X_ONLY       (0 << IBA7220_IBC_WIDTH_SHIFT)
 447 #define IBA7220_IBC_WIDTH_4X_ONLY       (1 << IBA7220_IBC_WIDTH_SHIFT)
 448 #define IBA7220_IBC_WIDTH_AUTONEG       (2 << IBA7220_IBC_WIDTH_SHIFT)
 449 #define IBA7220_IBC_SPEED_AUTONEG       (1 << 1)
 450 #define IBA7220_IBC_SPEED_SDR           (1 << 2)
 451 #define IBA7220_IBC_SPEED_DDR           (1 << 3)
 452 #define IBA7220_IBC_SPEED_AUTONEG_MASK  (0x7 << 1)
 453 #define IBA7220_IBC_IBTA_1_2_MASK       (1)
 454
 455 /* kr_ibcddrstatus */
 456 /* link latency shift is 0, don't bother defining */
 457 #define IBA7220_DDRSTAT_LINKLAT_MASK    0x3ffffff
 458
 459 /* kr_extstatus bits */
 460 #define QLOGIC_IB_EXTS_FREQSEL 0x2
 461 #define QLOGIC_IB_EXTS_SERDESSEL 0x4
 462 #define QLOGIC_IB_EXTS_MEMBIST_ENDTEST     0x0000000000004000
 463 #define QLOGIC_IB_EXTS_MEMBIST_DISABLED    0x0000000000008000
 464
 465 /* kr_xgxsconfig bits */
 466 #define QLOGIC_IB_XGXS_RESET          0x5ULL
 467 #define QLOGIC_IB_XGXS_FC_SAFE        (1ULL << 63)
 468
 469 /* kr_rcvpktledcnt */
 470 #define IBA7220_LEDBLINK_ON_SHIFT 32 /* 4ns period on after packet */
 471 #define IBA7220_LEDBLINK_OFF_SHIFT 0 /* 4ns period off before next on */
 472
 473 #define _QIB_GPIO_SDA_NUM 1
 474 #define _QIB_GPIO_SCL_NUM 0
 475 #define QIB_TWSI_EEPROM_DEV 0xA2 /* All Production 7220 cards. */
 476 #define QIB_TWSI_TEMP_DEV 0x98
 477
 478 /* HW counter clock is at 4nsec */
 479 #define QIB_7220_PSXMITWAIT_CHECK_RATE 4000
 480
 481 #define IBA7220_R_INTRAVAIL_SHIFT 17
 482 #define IBA7220_R_PKEY_DIS_SHIFT 34
 483 #define IBA7220_R_TAILUPD_SHIFT 35
 484 #define IBA7220_R_CTXTCFG_SHIFT 36
 485
 486 #define IBA7220_HDRHEAD_PKTINT_SHIFT 32 /* interrupt cnt in upper 32 bits */
 487
 488 /*
 489  * the size bits give us 2^N, in KB units.  0 marks as invalid,
 490  * and 7 is reserved.  We currently use only 2KB and 4KB
 491  */
 492 #define IBA7220_TID_SZ_SHIFT 37 /* shift to 3bit size selector */
 493 #define IBA7220_TID_SZ_2K (1UL << IBA7220_TID_SZ_SHIFT) /* 2KB */
 494 #define IBA7220_TID_SZ_4K (2UL << IBA7220_TID_SZ_SHIFT) /* 4KB */
 495 #define IBA7220_TID_PA_SHIFT 11U /* TID addr in chip stored w/o low bits */
 496 #define PBC_7220_VL15_SEND (1ULL << 63) /* pbc; VL15, no credit check */
 497 #define PBC_7220_VL15_SEND_CTRL (1ULL << 31) /* control version of same */
 498
 499 #define AUTONEG_TRIES 5 /* sequential retries to negotiate DDR */
 500
 501 /* packet rate matching delay multiplier */
 502 static u8 rate_to_delay[2][2] = {
 503         /* 1x, 4x */
 504         {   8, 2 }, /* SDR */
 505         {   4, 1 }  /* DDR */
 506 };
 507
 508 static u8 ib_rate_to_delay[IB_RATE_120_GBPS + 1] = {
 509         [IB_RATE_2_5_GBPS] = 8,
 510         [IB_RATE_5_GBPS] = 4,
 511         [IB_RATE_10_GBPS] = 2,
 512         [IB_RATE_20_GBPS] = 1
 513 };
 514
 515 #define IBA7220_LINKSPEED_SHIFT SYM_LSB(IBCStatus, LinkSpeedActive)
 516 #define IBA7220_LINKWIDTH_SHIFT SYM_LSB(IBCStatus, LinkWidthActive)
 517
 518 /* link training states, from IBC */
 519 #define IB_7220_LT_STATE_DISABLED        0x00
 520 #define IB_7220_LT_STATE_LINKUP          0x01
 521 #define IB_7220_LT_STATE_POLLACTIVE      0x02
 522 #define IB_7220_LT_STATE_POLLQUIET       0x03
 523 #define IB_7220_LT_STATE_SLEEPDELAY      0x04
 524 #define IB_7220_LT_STATE_SLEEPQUIET      0x05
 525 #define IB_7220_LT_STATE_CFGDEBOUNCE     0x08
 526 #define IB_7220_LT_STATE_CFGRCVFCFG      0x09
 527 #define IB_7220_LT_STATE_CFGWAITRMT      0x0a
 528 #define IB_7220_LT_STATE_CFGIDLE 0x0b
 529 #define IB_7220_LT_STATE_RECOVERRETRAIN  0x0c
 530 #define IB_7220_LT_STATE_RECOVERWAITRMT  0x0e
 531 #define IB_7220_LT_STATE_RECOVERIDLE     0x0f
 532
 533 /* link state machine states from IBC */
 534 #define IB_7220_L_STATE_DOWN             0x0
 535 #define IB_7220_L_STATE_INIT             0x1
 536 #define IB_7220_L_STATE_ARM              0x2
 537 #define IB_7220_L_STATE_ACTIVE           0x3
 538 #define IB_7220_L_STATE_ACT_DEFER        0x4
 539
 540 static const u8 qib_7220_physportstate[0x20] = {
 541         [IB_7220_LT_STATE_DISABLED] = IB_PHYSPORTSTATE_DISABLED,
 542         [IB_7220_LT_STATE_LINKUP] = IB_PHYSPORTSTATE_LINKUP,
 543         [IB_7220_LT_STATE_POLLACTIVE] = IB_PHYSPORTSTATE_POLL,
 544         [IB_7220_LT_STATE_POLLQUIET] = IB_PHYSPORTSTATE_POLL,
 545         [IB_7220_LT_STATE_SLEEPDELAY] = IB_PHYSPORTSTATE_SLEEP,
 546         [IB_7220_LT_STATE_SLEEPQUIET] = IB_PHYSPORTSTATE_SLEEP,
 547         [IB_7220_LT_STATE_CFGDEBOUNCE] =
 548                 IB_PHYSPORTSTATE_CFG_TRAIN,
 549         [IB_7220_LT_STATE_CFGRCVFCFG] =
 550                 IB_PHYSPORTSTATE_CFG_TRAIN,
 551         [IB_7220_LT_STATE_CFGWAITRMT] =
 552                 IB_PHYSPORTSTATE_CFG_TRAIN,
 553         [IB_7220_LT_STATE_CFGIDLE] = IB_PHYSPORTSTATE_CFG_TRAIN,
 554         [IB_7220_LT_STATE_RECOVERRETRAIN] =
 555                 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
 556         [IB_7220_LT_STATE_RECOVERWAITRMT] =
 557                 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
 558         [IB_7220_LT_STATE_RECOVERIDLE] =
 559                 IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
 560         [0x10] = IB_PHYSPORTSTATE_CFG_TRAIN,
 561         [0x11] = IB_PHYSPORTSTATE_CFG_TRAIN,
 562         [0x12] = IB_PHYSPORTSTATE_CFG_TRAIN,
 563         [0x13] = IB_PHYSPORTSTATE_CFG_TRAIN,
 564         [0x14] = IB_PHYSPORTSTATE_CFG_TRAIN,
 565         [0x15] = IB_PHYSPORTSTATE_CFG_TRAIN,
 566         [0x16] = IB_PHYSPORTSTATE_CFG_TRAIN,
 567         [0x17] = IB_PHYSPORTSTATE_CFG_TRAIN
 568 };
 569
 570 int qib_special_trigger;
 571 module_param_named(special_trigger, qib_special_trigger, int, S_IRUGO);
 572 MODULE_PARM_DESC(special_trigger, "Enable SpecialTrigger arm/launch");
 573
 574 #define IBCBUSFRSPCPARITYERR HWE_MASK(IBCBusFromSPCParityErr)
 575 #define IBCBUSTOSPCPARITYERR HWE_MASK(IBCBusToSPCParityErr)
 576
 577 #define SYM_MASK_BIT(regname, fldname, bit) ((u64) \
 578         (1ULL << (SYM_LSB(regname, fldname) + (bit))))
 579
 580 #define TXEMEMPARITYERR_PIOBUF \
 581         SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 0)
 582 #define TXEMEMPARITYERR_PIOPBC \
 583         SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 1)
 584 #define TXEMEMPARITYERR_PIOLAUNCHFIFO \
 585         SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 2)
 586
 587 #define RXEMEMPARITYERR_RCVBUF \
 588         SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 0)
 589 #define RXEMEMPARITYERR_LOOKUPQ \
 590         SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 1)
 591 #define RXEMEMPARITYERR_EXPTID \
 592         SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 2)
 593 #define RXEMEMPARITYERR_EAGERTID \
 594         SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 3)
 595 #define RXEMEMPARITYERR_FLAGBUF \
 596         SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 4)
 597 #define RXEMEMPARITYERR_DATAINFO \
 598         SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 5)
 599 #define RXEMEMPARITYERR_HDRINFO \
 600         SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 6)
 601
 602 /* 7220 specific hardware errors... */
 603 static const struct qib_hwerror_msgs qib_7220_hwerror_msgs[] = {
 604         /* generic hardware errors */
 605         QLOGIC_IB_HWE_MSG(IBCBUSFRSPCPARITYERR, "QIB2IB Parity"),
 606         QLOGIC_IB_HWE_MSG(IBCBUSTOSPCPARITYERR, "IB2QIB Parity"),
 607
 608         QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOBUF,
 609                           "TXE PIOBUF Memory Parity"),
 610         QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOPBC,
 611                           "TXE PIOPBC Memory Parity"),
 612         QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOLAUNCHFIFO,
 613                           "TXE PIOLAUNCHFIFO Memory Parity"),
 614
 615         QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_RCVBUF,
 616                           "RXE RCVBUF Memory Parity"),
 617         QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_LOOKUPQ,
 618                           "RXE LOOKUPQ Memory Parity"),
 619         QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EAGERTID,
 620                           "RXE EAGERTID Memory Parity"),
 621         QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EXPTID,
 622                           "RXE EXPTID Memory Parity"),
 623         QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_FLAGBUF,
 624                           "RXE FLAGBUF Memory Parity"),
 625         QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_DATAINFO,
 626                           "RXE DATAINFO Memory Parity"),
 627         QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_HDRINFO,
 628                           "RXE HDRINFO Memory Parity"),
 629
 630         /* chip-specific hardware errors */
 631         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEPOISONEDTLP,
 632                           "PCIe Poisoned TLP"),
 633         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLTIMEOUT,
 634                           "PCIe completion timeout"),
 635         /*
 636          * In practice, it's unlikely wthat we'll see PCIe PLL, or bus
 637          * parity or memory parity error failures, because most likely we
 638          * won't be able to talk to the core of the chip.  Nonetheless, we
 639          * might see them, if they are in parts of the PCIe core that aren't
 640          * essential.
 641          */
 642         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE1PLLFAILED,
 643                           "PCIePLL1"),
 644         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE0PLLFAILED,
 645                           "PCIePLL0"),
 646         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXTLH,
 647                           "PCIe XTLH core parity"),
 648         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXADM,
 649                           "PCIe ADM TX core parity"),
 650         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYRADM,
 651                           "PCIe ADM RX core parity"),
 652         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SERDESPLLFAILED,
 653                           "SerDes PLL"),
 654         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR,
 655                           "PCIe cpl header queue"),
 656         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR,
 657                           "PCIe cpl data queue"),
 658         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SDMAMEMREADERR,
 659                           "Send DMA memory read"),
 660         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED,
 661                           "uC PLL clock not locked"),
 662         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT,
 663                           "PCIe serdes Q0 no clock"),
 664         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT,
 665                           "PCIe serdes Q1 no clock"),
 666         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT,
 667                           "PCIe serdes Q2 no clock"),
 668         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT,
 669                           "PCIe serdes Q3 no clock"),
 670         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR,
 671                           "DDS RXEQ memory parity"),
 672         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR,
 673                           "IB uC memory parity"),
 674         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR,
 675                           "PCIe uC oct0 memory parity"),
 676         QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR,
 677                           "PCIe uC oct1 memory parity"),
 678 };
 679
 680 #define RXE_PARITY (RXEMEMPARITYERR_EAGERTID|RXEMEMPARITYERR_EXPTID)
 681
 682 #define QLOGIC_IB_E_PKTERRS (\
 683                 ERR_MASK(SendPktLenErr) |                               \
 684                 ERR_MASK(SendDroppedDataPktErr) |                       \
 685                 ERR_MASK(RcvVCRCErr) |                                  \
 686                 ERR_MASK(RcvICRCErr) |                                  \
 687                 ERR_MASK(RcvShortPktLenErr) |                           \
 688                 ERR_MASK(RcvEBPErr))
 689
 690 /* Convenience for decoding Send DMA errors */
 691 #define QLOGIC_IB_E_SDMAERRS ( \
 692                 ERR_MASK(SDmaGenMismatchErr) |                          \
 693                 ERR_MASK(SDmaOutOfBoundErr) |                           \
 694                 ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) | \
 695                 ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) |    \
 696                 ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) |    \
 697                 ERR_MASK(SDmaUnexpDataErr) |                            \
 698                 ERR_MASK(SDmaDescAddrMisalignErr) |                     \
 699                 ERR_MASK(SDmaDisabledErr) |                             \
 700                 ERR_MASK(SendBufMisuseErr))
 701
 702 /* These are all rcv-related errors which we want to count for stats */
 703 #define E_SUM_PKTERRS \
 704         (ERR_MASK(RcvHdrLenErr) | ERR_MASK(RcvBadTidErr) |              \
 705          ERR_MASK(RcvBadVersionErr) | ERR_MASK(RcvHdrErr) |             \
 706          ERR_MASK(RcvLongPktLenErr) | ERR_MASK(RcvShortPktLenErr) |     \
 707          ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvMinPktLenErr) |        \
 708          ERR_MASK(RcvFormatErr) | ERR_MASK(RcvUnsupportedVLErr) |       \
 709          ERR_MASK(RcvUnexpectedCharErr) | ERR_MASK(RcvEBPErr))
 710
 711 /* These are all send-related errors which we want to count for stats */
 712 #define E_SUM_ERRS \
 713         (ERR_MASK(SendPioArmLaunchErr) | ERR_MASK(SendUnexpectedPktNumErr) | \
 714          ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
 715          ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnsupportedVLErr) |  \
 716          ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) |         \
 717          ERR_MASK(InvalidAddrErr))
 718
 719 /*
 720  * this is similar to E_SUM_ERRS, but can't ignore armlaunch, don't ignore
 721  * errors not related to freeze and cancelling buffers.  Can't ignore
 722  * armlaunch because could get more while still cleaning up, and need
 723  * to cancel those as they happen.
 724  */
 725 #define E_SPKT_ERRS_IGNORE \
 726         (ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
 727          ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendMinPktLenErr) |      \
 728          ERR_MASK(SendPktLenErr))
 729
 730 /*
 731  * these are errors that can occur when the link changes state while
 732  * a packet is being sent or received.  This doesn't cover things
 733  * like EBP or VCRC that can be the result of a sending having the
 734  * link change state, so we receive a "known bad" packet.
 735  */
 736 #define E_SUM_LINK_PKTERRS \
 737         (ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
 738          ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) |         \
 739          ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvMinPktLenErr) |      \
 740          ERR_MASK(RcvUnexpectedCharErr))
 741
 742 static void autoneg_7220_work(struct work_struct *);
 743 static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *, u64, u32 *);
 744
 745 /*
 746  * Called when we might have an error that is specific to a particular
 747  * PIO buffer, and may need to cancel that buffer, so it can be re-used.
 748  * because we don't need to force the update of pioavail.
 749  */
 750 static void qib_disarm_7220_senderrbufs(struct qib_pportdata *ppd)
 751 {
 752         unsigned long sbuf[3];
 753         struct qib_devdata *dd = ppd->dd;
 754
 755         /*
 756          * It's possible that sendbuffererror could have bits set; might
 757          * have already done this as a result of hardware error handling.
 758          */
 759         /* read these before writing errorclear */
 760         sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
 761         sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
 762         sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
 763
 764         if (sbuf[0] || sbuf[1] || sbuf[2])
 765                 qib_disarm_piobufs_set(dd, sbuf,
 766                                        dd->piobcnt2k + dd->piobcnt4k);
 767 }
 768
 769 static void qib_7220_txe_recover(struct qib_devdata *dd)
 770 {
 771         qib_devinfo(dd->pcidev, "Recovering from TXE PIO parity error\n");
 772         qib_disarm_7220_senderrbufs(dd->pport);
 773 }
 774
 775 /*
 776  * This is called with interrupts disabled and sdma_lock held.
 777  */
 778 static void qib_7220_sdma_sendctrl(struct qib_pportdata *ppd, unsigned op)
 779 {
 780         struct qib_devdata *dd = ppd->dd;
 781         u64 set_sendctrl = 0;
 782         u64 clr_sendctrl = 0;
 783
 784         if (op & QIB_SDMA_SENDCTRL_OP_ENABLE)
 785                 set_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
 786         else
 787                 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
 788
 789         if (op & QIB_SDMA_SENDCTRL_OP_INTENABLE)
 790                 set_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
 791         else
 792                 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
 793
 794         if (op & QIB_SDMA_SENDCTRL_OP_HALT)
 795                 set_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
 796         else
 797                 clr_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
 798
 799         spin_lock(&dd->sendctrl_lock);
 800
 801         dd->sendctrl |= set_sendctrl;
 802         dd->sendctrl &= ~clr_sendctrl;
 803
 804         qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
 805         qib_write_kreg(dd, kr_scratch, 0);
 806
 807         spin_unlock(&dd->sendctrl_lock);
 808 }
 809
 810 static void qib_decode_7220_sdma_errs(struct qib_pportdata *ppd,
 811                                       u64 err, char *buf, size_t blen)
 812 {
 813         static const struct {
 814                 u64 err;
 815                 const char *msg;
 816         } errs[] = {
 817                 { ERR_MASK(SDmaGenMismatchErr),
 818                   "SDmaGenMismatch" },
 819                 { ERR_MASK(SDmaOutOfBoundErr),
 820                   "SDmaOutOfBound" },
 821                 { ERR_MASK(SDmaTailOutOfBoundErr),
 822                   "SDmaTailOutOfBound" },
 823                 { ERR_MASK(SDmaBaseErr),
 824                   "SDmaBase" },
 825                 { ERR_MASK(SDma1stDescErr),
 826                   "SDma1stDesc" },
 827                 { ERR_MASK(SDmaRpyTagErr),
 828                   "SDmaRpyTag" },
 829                 { ERR_MASK(SDmaDwEnErr),
 830                   "SDmaDwEn" },
 831                 { ERR_MASK(SDmaMissingDwErr),
 832                   "SDmaMissingDw" },
 833                 { ERR_MASK(SDmaUnexpDataErr),
 834                   "SDmaUnexpData" },
 835                 { ERR_MASK(SDmaDescAddrMisalignErr),
 836                   "SDmaDescAddrMisalign" },
 837                 { ERR_MASK(SendBufMisuseErr),
 838                   "SendBufMisuse" },
 839                 { ERR_MASK(SDmaDisabledErr),
 840                   "SDmaDisabled" },
 841         };
 842         int i;
 843         size_t bidx = 0;
 844
 845         for (i = 0; i < ARRAY_SIZE(errs); i++) {
 846                 if (err & errs[i].err)
 847                         bidx += scnprintf(buf + bidx, blen - bidx,
 848                                          "%s ", errs[i].msg);
 849         }
 850 }
 851
 852 /*
 853  * This is called as part of link down clean up so disarm and flush
 854  * all send buffers so that SMP packets can be sent.
 855  */
 856 static void qib_7220_sdma_hw_clean_up(struct qib_pportdata *ppd)
 857 {
 858         /* This will trigger the Abort interrupt */
 859         sendctrl_7220_mod(ppd, QIB_SENDCTRL_DISARM_ALL | QIB_SENDCTRL_FLUSH |
 860                           QIB_SENDCTRL_AVAIL_BLIP);
 861         ppd->dd->upd_pio_shadow  = 1; /* update our idea of what's busy */
 862 }
 863
 864 static void qib_sdma_7220_setlengen(struct qib_pportdata *ppd)
 865 {
 866         /*
 867          * Set SendDmaLenGen and clear and set
 868          * the MSB of the generation count to enable generation checking
 869          * and load the internal generation counter.
 870          */
 871         qib_write_kreg(ppd->dd, kr_senddmalengen, ppd->sdma_descq_cnt);
 872         qib_write_kreg(ppd->dd, kr_senddmalengen,
 873                        ppd->sdma_descq_cnt |
 874                        (1ULL << QIB_7220_SendDmaLenGen_Generation_MSB));
 875 }
 876
 877 static void qib_7220_sdma_hw_start_up(struct qib_pportdata *ppd)
 878 {
 879         qib_sdma_7220_setlengen(ppd);
 880         qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
 881         ppd->sdma_head_dma[0] = 0;
 882 }
 883
 884 #define DISABLES_SDMA (                                                 \
 885                 ERR_MASK(SDmaDisabledErr) |                             \
 886                 ERR_MASK(SDmaBaseErr) |                                 \
 887                 ERR_MASK(SDmaTailOutOfBoundErr) |                       \
 888                 ERR_MASK(SDmaOutOfBoundErr) |                           \
 889                 ERR_MASK(SDma1stDescErr) |                              \
 890                 ERR_MASK(SDmaRpyTagErr) |                               \
 891                 ERR_MASK(SDmaGenMismatchErr) |                          \
 892                 ERR_MASK(SDmaDescAddrMisalignErr) |                     \
 893                 ERR_MASK(SDmaMissingDwErr) |                            \
 894                 ERR_MASK(SDmaDwEnErr))
 895
 896 static void sdma_7220_errors(struct qib_pportdata *ppd, u64 errs)
 897 {
 898         unsigned long flags;
 899         struct qib_devdata *dd = ppd->dd;
 900         char *msg;
 901
 902         errs &= QLOGIC_IB_E_SDMAERRS;
 903
 904         msg = dd->cspec->sdmamsgbuf;
 905         qib_decode_7220_sdma_errs(ppd, errs, msg,
 906                 sizeof(dd->cspec->sdmamsgbuf));
 907         spin_lock_irqsave(&ppd->sdma_lock, flags);
 908
 909         if (errs & ERR_MASK(SendBufMisuseErr)) {
 910                 unsigned long sbuf[3];
 911
 912                 sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
 913                 sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
 914                 sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
 915
 916                 qib_dev_err(ppd->dd,
 917                             "IB%u:%u SendBufMisuse: %04lx %016lx %016lx\n",
 918                             ppd->dd->unit, ppd->port, sbuf[2], sbuf[1],
 919                             sbuf[0]);
 920         }
 921
 922         if (errs & ERR_MASK(SDmaUnexpDataErr))
 923                 qib_dev_err(dd, "IB%u:%u SDmaUnexpData\n", ppd->dd->unit,
 924                             ppd->port);
 925
 926         switch (ppd->sdma_state.current_state) {
 927         case qib_sdma_state_s00_hw_down:
 928                 /* not expecting any interrupts */
 929                 break;
 930
 931         case qib_sdma_state_s10_hw_start_up_wait:
 932                 /* handled in intr path */
 933                 break;
 934
 935         case qib_sdma_state_s20_idle:
 936                 /* not expecting any interrupts */
 937                 break;
 938
 939         case qib_sdma_state_s30_sw_clean_up_wait:
 940                 /* not expecting any interrupts */
 941                 break;
 942
 943         case qib_sdma_state_s40_hw_clean_up_wait:
 944                 if (errs & ERR_MASK(SDmaDisabledErr))
 945                         __qib_sdma_process_event(ppd,
 946                                 qib_sdma_event_e50_hw_cleaned);
 947                 break;
 948
 949         case qib_sdma_state_s50_hw_halt_wait:
 950                 /* handled in intr path */
 951                 break;
 952
 953         case qib_sdma_state_s99_running:
 954                 if (errs & DISABLES_SDMA)
 955                         __qib_sdma_process_event(ppd,
 956                                 qib_sdma_event_e7220_err_halted);
 957                 break;
 958         }
 959
 960         spin_unlock_irqrestore(&ppd->sdma_lock, flags);
 961 }
 962
 963 /*
 964  * Decode the error status into strings, deciding whether to always
 965  * print * it or not depending on "normal packet errors" vs everything
 966  * else.   Return 1 if "real" errors, otherwise 0 if only packet
 967  * errors, so caller can decide what to print with the string.
 968  */
 969 static int qib_decode_7220_err(struct qib_devdata *dd, char *buf, size_t blen,
 970                                u64 err)
 971 {
 972         int iserr = 1;
 973
 974         *buf = '\0';
 975         if (err & QLOGIC_IB_E_PKTERRS) {
 976                 if (!(err & ~QLOGIC_IB_E_PKTERRS))
 977                         iserr = 0;
 978                 if ((err & ERR_MASK(RcvICRCErr)) &&
 979                     !(err & (ERR_MASK(RcvVCRCErr) | ERR_MASK(RcvEBPErr))))
 980                         strlcat(buf, "CRC ", blen);
 981                 if (!iserr)
 982                         goto done;
 983         }
 984         if (err & ERR_MASK(RcvHdrLenErr))
 985                 strlcat(buf, "rhdrlen ", blen);
 986         if (err & ERR_MASK(RcvBadTidErr))
 987                 strlcat(buf, "rbadtid ", blen);
 988         if (err & ERR_MASK(RcvBadVersionErr))
 989                 strlcat(buf, "rbadversion ", blen);
 990         if (err & ERR_MASK(RcvHdrErr))
 991                 strlcat(buf, "rhdr ", blen);
 992         if (err & ERR_MASK(SendSpecialTriggerErr))
 993                 strlcat(buf, "sendspecialtrigger ", blen);
 994         if (err & ERR_MASK(RcvLongPktLenErr))
 995                 strlcat(buf, "rlongpktlen ", blen);
 996         if (err & ERR_MASK(RcvMaxPktLenErr))
 997                 strlcat(buf, "rmaxpktlen ", blen);
 998         if (err & ERR_MASK(RcvMinPktLenErr))
 999                 strlcat(buf, "rminpktlen ", blen);
1000         if (err & ERR_MASK(SendMinPktLenErr))
1001                 strlcat(buf, "sminpktlen ", blen);
1002         if (err & ERR_MASK(RcvFormatErr))
1003                 strlcat(buf, "rformaterr ", blen);
1004         if (err & ERR_MASK(RcvUnsupportedVLErr))
1005                 strlcat(buf, "runsupvl ", blen);
1006         if (err & ERR_MASK(RcvUnexpectedCharErr))
1007                 strlcat(buf, "runexpchar ", blen);
1008         if (err & ERR_MASK(RcvIBFlowErr))
1009                 strlcat(buf, "ribflow ", blen);
1010         if (err & ERR_MASK(SendUnderRunErr))
1011                 strlcat(buf, "sunderrun ", blen);
1012         if (err & ERR_MASK(SendPioArmLaunchErr))
1013                 strlcat(buf, "spioarmlaunch ", blen);
1014         if (err & ERR_MASK(SendUnexpectedPktNumErr))
1015                 strlcat(buf, "sunexperrpktnum ", blen);
1016         if (err & ERR_MASK(SendDroppedSmpPktErr))
1017                 strlcat(buf, "sdroppedsmppkt ", blen);
1018         if (err & ERR_MASK(SendMaxPktLenErr))
1019                 strlcat(buf, "smaxpktlen ", blen);
1020         if (err & ERR_MASK(SendUnsupportedVLErr))
1021                 strlcat(buf, "sunsupVL ", blen);
1022         if (err & ERR_MASK(InvalidAddrErr))
1023                 strlcat(buf, "invalidaddr ", blen);
1024         if (err & ERR_MASK(RcvEgrFullErr))
1025                 strlcat(buf, "rcvegrfull ", blen);
1026         if (err & ERR_MASK(RcvHdrFullErr))
1027                 strlcat(buf, "rcvhdrfull ", blen);
1028         if (err & ERR_MASK(IBStatusChanged))
1029                 strlcat(buf, "ibcstatuschg ", blen);
1030         if (err & ERR_MASK(RcvIBLostLinkErr))
1031                 strlcat(buf, "riblostlink ", blen);
1032         if (err & ERR_MASK(HardwareErr))
1033                 strlcat(buf, "hardware ", blen);
1034         if (err & ERR_MASK(ResetNegated))
1035                 strlcat(buf, "reset ", blen);
1036         if (err & QLOGIC_IB_E_SDMAERRS)
1037                 qib_decode_7220_sdma_errs(dd->pport, err, buf, blen);
1038         if (err & ERR_MASK(InvalidEEPCmd))
1039                 strlcat(buf, "invalideepromcmd ", blen);
1040 done:
1041         return iserr;
1042 }
1043
1044 static void reenable_7220_chase(unsigned long opaque)
1045 {
1046         struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;
1047
1048         ppd->cpspec->chase_timer.expires = 0;
1049         qib_set_ib_7220_lstate(ppd, QLOGIC_IB_IBCC_LINKCMD_DOWN,
1050                 QLOGIC_IB_IBCC_LINKINITCMD_POLL);
1051 }
1052
1053 static void handle_7220_chase(struct qib_pportdata *ppd, u64 ibcst)
1054 {
1055         u8 ibclt;
1056         unsigned long tnow;
1057
1058         ibclt = (u8)SYM_FIELD(ibcst, IBCStatus, LinkTrainingState);
1059
1060         /*
1061          * Detect and handle the state chase issue, where we can
1062          * get stuck if we are unlucky on timing on both sides of
1063          * the link.   If we are, we disable, set a timer, and
1064          * then re-enable.
1065          */
1066         switch (ibclt) {
1067         case IB_7220_LT_STATE_CFGRCVFCFG:
1068         case IB_7220_LT_STATE_CFGWAITRMT:
1069         case IB_7220_LT_STATE_TXREVLANES:
1070         case IB_7220_LT_STATE_CFGENH:
1071                 tnow = jiffies;
1072                 if (ppd->cpspec->chase_end &&
1073                     time_after(tnow, ppd->cpspec->chase_end)) {
1074                         ppd->cpspec->chase_end = 0;
1075                         qib_set_ib_7220_lstate(ppd,
1076                                 QLOGIC_IB_IBCC_LINKCMD_DOWN,
1077                                 QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
1078                         ppd->cpspec->chase_timer.expires = jiffies +
1079                                 QIB_CHASE_DIS_TIME;
1080                         add_timer(&ppd->cpspec->chase_timer);
1081                 } else if (!ppd->cpspec->chase_end)
1082                         ppd->cpspec->chase_end = tnow + QIB_CHASE_TIME;
1083                 break;
1084
1085         default:
1086                 ppd->cpspec->chase_end = 0;
1087                 break;
1088         }
1089 }
1090
1091 static void handle_7220_errors(struct qib_devdata *dd, u64 errs)
1092 {
1093         char *msg;
1094         u64 ignore_this_time = 0;
1095         u64 iserr = 0;
1096         int log_idx;
1097         struct qib_pportdata *ppd = dd->pport;
1098         u64 mask;
1099
1100         /* don't report errors that are masked */
1101         errs &= dd->cspec->errormask;
1102         msg = dd->cspec->emsgbuf;
1103
1104         /* do these first, they are most important */
1105         if (errs & ERR_MASK(HardwareErr))
1106                 qib_7220_handle_hwerrors(dd, msg, sizeof(dd->cspec->emsgbuf));
1107         else
1108                 for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
1109                         if (errs & dd->eep_st_masks[log_idx].errs_to_log)
1110                                 qib_inc_eeprom_err(dd, log_idx, 1);
1111
1112         if (errs & QLOGIC_IB_E_SDMAERRS)
1113                 sdma_7220_errors(ppd, errs);
1114
1115         if (errs & ~IB_E_BITSEXTANT)
1116                 qib_dev_err(dd,
1117                         "error interrupt with unknown errors %llx set\n",
1118                         (unsigned long long) (errs & ~IB_E_BITSEXTANT));
1119
1120         if (errs & E_SUM_ERRS) {
1121                 qib_disarm_7220_senderrbufs(ppd);
1122                 if ((errs & E_SUM_LINK_PKTERRS) &&
1123                     !(ppd->lflags & QIBL_LINKACTIVE)) {
1124                         /*
1125                          * This can happen when trying to bring the link
1126                          * up, but the IB link changes state at the "wrong"
1127                          * time. The IB logic then complains that the packet
1128                          * isn't valid.  We don't want to confuse people, so
1129                          * we just don't print them, except at debug
1130                          */
1131                         ignore_this_time = errs & E_SUM_LINK_PKTERRS;
1132                 }
1133         } else if ((errs & E_SUM_LINK_PKTERRS) &&
1134                    !(ppd->lflags & QIBL_LINKACTIVE)) {
1135                 /*
1136                  * This can happen when SMA is trying to bring the link
1137                  * up, but the IB link changes state at the "wrong" time.
1138                  * The IB logic then complains that the packet isn't
1139                  * valid.  We don't want to confuse people, so we just
1140                  * don't print them, except at debug
1141                  */
1142                 ignore_this_time = errs & E_SUM_LINK_PKTERRS;
1143         }
1144
1145         qib_write_kreg(dd, kr_errclear, errs);
1146
1147         errs &= ~ignore_this_time;
1148         if (!errs)
1149                 goto done;
1150
1151         /*
1152          * The ones we mask off are handled specially below
1153          * or above.  Also mask SDMADISABLED by default as it
1154          * is too chatty.
1155          */
1156         mask = ERR_MASK(IBStatusChanged) |
1157                 ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) |
1158                 ERR_MASK(HardwareErr) | ERR_MASK(SDmaDisabledErr);
1159
1160         qib_decode_7220_err(dd, msg, sizeof(dd->cspec->emsgbuf), errs & ~mask);
1161
1162         if (errs & E_SUM_PKTERRS)
1163                 qib_stats.sps_rcverrs++;
1164         if (errs & E_SUM_ERRS)
1165                 qib_stats.sps_txerrs++;
1166         iserr = errs & ~(E_SUM_PKTERRS | QLOGIC_IB_E_PKTERRS |
1167                          ERR_MASK(SDmaDisabledErr));
1168
1169         if (errs & ERR_MASK(IBStatusChanged)) {
1170                 u64 ibcs;
1171
1172                 ibcs = qib_read_kreg64(dd, kr_ibcstatus);
1173                 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
1174                         handle_7220_chase(ppd, ibcs);
1175
1176                 /* Update our picture of width and speed from chip */
1177                 ppd->link_width_active =
1178                         ((ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1) ?
1179                             IB_WIDTH_4X : IB_WIDTH_1X;
1180                 ppd->link_speed_active =
1181                         ((ibcs >> IBA7220_LINKSPEED_SHIFT) & 1) ?
1182                             QIB_IB_DDR : QIB_IB_SDR;
1183
1184                 /*
1185                  * Since going into a recovery state causes the link state
1186                  * to go down and since recovery is transitory, it is better
1187                  * if we "miss" ever seeing the link training state go into
1188                  * recovery (i.e., ignore this transition for link state
1189                  * special handling purposes) without updating lastibcstat.
1190                  */
1191                 if (qib_7220_phys_portstate(ibcs) !=
1192                                             IB_PHYSPORTSTATE_LINK_ERR_RECOVER)
1193                         qib_handle_e_ibstatuschanged(ppd, ibcs);
1194         }
1195
1196         if (errs & ERR_MASK(ResetNegated)) {
1197                 qib_dev_err(dd,
1198                         "Got reset, requires re-init (unload and reload driver)\n");
1199                 dd->flags &= ~QIB_INITTED;  /* needs re-init */
1200                 /* mark as having had error */
1201                 *dd->devstatusp |= QIB_STATUS_HWERROR;
1202                 *dd->pport->statusp &= ~QIB_STATUS_IB_CONF;
1203         }
1204
1205         if (*msg && iserr)
1206                 qib_dev_porterr(dd, ppd->port, "%s error\n", msg);
1207
1208         if (ppd->state_wanted & ppd->lflags)
1209                 wake_up_interruptible(&ppd->state_wait);
1210
1211         /*
1212          * If there were hdrq or egrfull errors, wake up any processes
1213          * waiting in poll.  We used to try to check which contexts had
1214          * the overflow, but given the cost of that and the chip reads
1215          * to support it, it's better to just wake everybody up if we
1216          * get an overflow; waiters can poll again if it's not them.
1217          */
1218         if (errs & (ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr))) {
1219                 qib_handle_urcv(dd, ~0U);
1220                 if (errs & ERR_MASK(RcvEgrFullErr))
1221                         qib_stats.sps_buffull++;
1222                 else
1223                         qib_stats.sps_hdrfull++;
1224         }
1225 done:
1226         return;
1227 }
1228
1229 /* enable/disable chip from delivering interrupts */
1230 static void qib_7220_set_intr_state(struct qib_devdata *dd, u32 enable)
1231 {
1232         if (enable) {
1233                 if (dd->flags & QIB_BADINTR)
1234                         return;
1235                 qib_write_kreg(dd, kr_intmask, ~0ULL);
1236                 /* force re-interrupt of any pending interrupts. */
1237                 qib_write_kreg(dd, kr_intclear, 0ULL);
1238         } else
1239                 qib_write_kreg(dd, kr_intmask, 0ULL);
1240 }
1241
1242 /*
1243  * Try to cleanup as much as possible for anything that might have gone
1244  * wrong while in freeze mode, such as pio buffers being written by user
1245  * processes (causing armlaunch), send errors due to going into freeze mode,
1246  * etc., and try to avoid causing extra interrupts while doing so.
1247  * Forcibly update the in-memory pioavail register copies after cleanup
1248  * because the chip won't do it while in freeze mode (the register values
1249  * themselves are kept correct).
1250  * Make sure that we don't lose any important interrupts by using the chip
1251  * feature that says that writing 0 to a bit in *clear that is set in
1252  * *status will cause an interrupt to be generated again (if allowed by
1253  * the *mask value).
1254  * This is in chip-specific code because of all of the register accesses,
1255  * even though the details are similar on most chips.
1256  */
1257 static void qib_7220_clear_freeze(struct qib_devdata *dd)
1258 {
1259         /* disable error interrupts, to avoid confusion */
1260         qib_write_kreg(dd, kr_errmask, 0ULL);
1261
1262         /* also disable interrupts; errormask is sometimes overwriten */
1263         qib_7220_set_intr_state(dd, 0);
1264
1265         qib_cancel_sends(dd->pport);
1266
1267         /* clear the freeze, and be sure chip saw it */
1268         qib_write_kreg(dd, kr_control, dd->control);
1269         qib_read_kreg32(dd, kr_scratch);
1270
1271         /* force in-memory update now we are out of freeze */
1272         qib_force_pio_avail_update(dd);
1273
1274         /*
1275          * force new interrupt if any hwerr, error or interrupt bits are
1276          * still set, and clear "safe" send packet errors related to freeze
1277          * and cancelling sends.  Re-enable error interrupts before possible
1278          * force of re-interrupt on pending interrupts.
1279          */
1280         qib_write_kreg(dd, kr_hwerrclear, 0ULL);
1281         qib_write_kreg(dd, kr_errclear, E_SPKT_ERRS_IGNORE);
1282         qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
1283         qib_7220_set_intr_state(dd, 1);
1284 }
1285
1286 /**
1287  * qib_7220_handle_hwerrors - display hardware errors.
1288  * @dd: the qlogic_ib device
1289  * @msg: the output buffer
1290  * @msgl: the size of the output buffer
1291  *
1292  * Use same msg buffer as regular errors to avoid excessive stack
1293  * use.  Most hardware errors are catastrophic, but for right now,
1294  * we'll print them and continue.  We reuse the same message buffer as
1295  * handle_7220_errors() to avoid excessive stack usage.
1296  */
1297 static void qib_7220_handle_hwerrors(struct qib_devdata *dd, char *msg,
1298                                      size_t msgl)
1299 {
1300         u64 hwerrs;
1301         u32 bits, ctrl;
1302         int isfatal = 0;
1303         char *bitsmsg;
1304         int log_idx;
1305
1306         hwerrs = qib_read_kreg64(dd, kr_hwerrstatus);
1307         if (!hwerrs)
1308                 goto bail;
1309         if (hwerrs == ~0ULL) {
1310                 qib_dev_err(dd,
1311                         "Read of hardware error status failed (all bits set); ignoring\n");
1312                 goto bail;
1313         }
1314         qib_stats.sps_hwerrs++;
1315
1316         /*
1317          * Always clear the error status register, except MEMBISTFAIL,
1318          * regardless of whether we continue or stop using the chip.
1319          * We want that set so we know it failed, even across driver reload.
1320          * We'll still ignore it in the hwerrmask.  We do this partly for
1321          * diagnostics, but also for support.
1322          */
1323         qib_write_kreg(dd, kr_hwerrclear,
1324                        hwerrs & ~HWE_MASK(PowerOnBISTFailed));
1325
1326         hwerrs &= dd->cspec->hwerrmask;
1327
1328         /* We log some errors to EEPROM, check if we have any of those. */
1329         for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
1330                 if (hwerrs & dd->eep_st_masks[log_idx].hwerrs_to_log)
1331                         qib_inc_eeprom_err(dd, log_idx, 1);
1332         if (hwerrs & ~(TXEMEMPARITYERR_PIOBUF | TXEMEMPARITYERR_PIOPBC |
1333                        RXE_PARITY))
1334                 qib_devinfo(dd->pcidev,
1335                         "Hardware error: hwerr=0x%llx (cleared)\n",
1336                         (unsigned long long) hwerrs);
1337
1338         if (hwerrs & ~IB_HWE_BITSEXTANT)
1339                 qib_dev_err(dd,
1340                         "hwerror interrupt with unknown errors %llx set\n",
1341                         (unsigned long long) (hwerrs & ~IB_HWE_BITSEXTANT));
1342
1343         if (hwerrs & QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR)
1344                 qib_sd7220_clr_ibpar(dd);
1345
1346         ctrl = qib_read_kreg32(dd, kr_control);
1347         if ((ctrl & QLOGIC_IB_C_FREEZEMODE) && !dd->diag_client) {
1348                 /*
1349                  * Parity errors in send memory are recoverable by h/w
1350                  * just do housekeeping, exit freeze mode and continue.
1351                  */
1352                 if (hwerrs & (TXEMEMPARITYERR_PIOBUF |
1353                               TXEMEMPARITYERR_PIOPBC)) {
1354                         qib_7220_txe_recover(dd);
1355                         hwerrs &= ~(TXEMEMPARITYERR_PIOBUF |
1356                                     TXEMEMPARITYERR_PIOPBC);
1357                 }
1358                 if (hwerrs)
1359                         isfatal = 1;
1360                 else
1361                         qib_7220_clear_freeze(dd);
1362         }
1363
1364         *msg = '\0';
1365
1366         if (hwerrs & HWE_MASK(PowerOnBISTFailed)) {
1367                 isfatal = 1;
1368                 strlcat(msg,
1369                         "[Memory BIST test failed, InfiniPath hardware unusable]",
1370                         msgl);
1371                 /* ignore from now on, so disable until driver reloaded */
1372                 dd->cspec->hwerrmask &= ~HWE_MASK(PowerOnBISTFailed);
1373                 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1374         }
1375
1376         qib_format_hwerrors(hwerrs, qib_7220_hwerror_msgs,
1377                             ARRAY_SIZE(qib_7220_hwerror_msgs), msg, msgl);
1378
1379         bitsmsg = dd->cspec->bitsmsgbuf;
1380         if (hwerrs & (QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK <<
1381                       QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT)) {
1382                 bits = (u32) ((hwerrs >>
1383                                QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) &
1384                               QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK);
1385                 snprintf(bitsmsg, sizeof(dd->cspec->bitsmsgbuf),
1386                          "[PCIe Mem Parity Errs %x] ", bits);
1387                 strlcat(msg, bitsmsg, msgl);
1388         }
1389
1390 #define _QIB_PLL_FAIL (QLOGIC_IB_HWE_COREPLL_FBSLIP |   \
1391                          QLOGIC_IB_HWE_COREPLL_RFSLIP)
1392
1393         if (hwerrs & _QIB_PLL_FAIL) {
1394                 isfatal = 1;
1395                 snprintf(bitsmsg, sizeof(dd->cspec->bitsmsgbuf),
1396                          "[PLL failed (%llx), InfiniPath hardware unusable]",
1397                          (unsigned long long) hwerrs & _QIB_PLL_FAIL);
1398                 strlcat(msg, bitsmsg, msgl);
1399                 /* ignore from now on, so disable until driver reloaded */
1400                 dd->cspec->hwerrmask &= ~(hwerrs & _QIB_PLL_FAIL);
1401                 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1402         }
1403
1404         if (hwerrs & QLOGIC_IB_HWE_SERDESPLLFAILED) {
1405                 /*
1406                  * If it occurs, it is left masked since the eternal
1407                  * interface is unused.
1408                  */
1409                 dd->cspec->hwerrmask &= ~QLOGIC_IB_HWE_SERDESPLLFAILED;
1410                 qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1411         }
1412
1413         qib_dev_err(dd, "%s hardware error\n", msg);
1414
1415         if (isfatal && !dd->diag_client) {
1416                 qib_dev_err(dd,
1417                         "Fatal Hardware Error, no longer usable, SN %.16s\n",
1418                         dd->serial);
1419                 /*
1420                  * For /sys status file and user programs to print; if no
1421                  * trailing brace is copied, we'll know it was truncated.
1422                  */
1423                 if (dd->freezemsg)
1424                         snprintf(dd->freezemsg, dd->freezelen,
1425                                  "{%s}", msg);
1426                 qib_disable_after_error(dd);
1427         }
1428 bail:;
1429 }
1430
1431 /**
1432  * qib_7220_init_hwerrors - enable hardware errors
1433  * @dd: the qlogic_ib device
1434  *
1435  * now that we have finished initializing everything that might reasonably
1436  * cause a hardware error, and cleared those errors bits as they occur,
1437  * we can enable hardware errors in the mask (potentially enabling
1438  * freeze mode), and enable hardware errors as errors (along with
1439  * everything else) in errormask
1440  */
1441 static void qib_7220_init_hwerrors(struct qib_devdata *dd)
1442 {
1443         u64 val;
1444         u64 extsval;
1445
1446         extsval = qib_read_kreg64(dd, kr_extstatus);
1447
1448         if (!(extsval & (QLOGIC_IB_EXTS_MEMBIST_ENDTEST |
1449                          QLOGIC_IB_EXTS_MEMBIST_DISABLED)))
1450                 qib_dev_err(dd, "MemBIST did not complete!\n");
1451         if (extsval & QLOGIC_IB_EXTS_MEMBIST_DISABLED)
1452                 qib_devinfo(dd->pcidev, "MemBIST is disabled.\n");
1453
1454         val = ~0ULL;    /* default to all hwerrors become interrupts, */
1455
1456         val &= ~QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR;
1457         dd->cspec->hwerrmask = val;
1458
1459         qib_write_kreg(dd, kr_hwerrclear, ~HWE_MASK(PowerOnBISTFailed));
1460         qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
1461
1462         /* clear all */
1463         qib_write_kreg(dd, kr_errclear, ~0ULL);
1464         /* enable errors that are masked, at least this first time. */
1465         qib_write_kreg(dd, kr_errmask, ~0ULL);
1466         dd->cspec->errormask = qib_read_kreg64(dd, kr_errmask);
1467         /* clear any interrupts up to this point (ints still not enabled) */
1468         qib_write_kreg(dd, kr_intclear, ~0ULL);
1469 }
1470
1471 /*
1472  * Disable and enable the armlaunch error.  Used for PIO bandwidth testing
1473  * on chips that are count-based, rather than trigger-based.  There is no
1474  * reference counting, but that's also fine, given the intended use.
1475  * Only chip-specific because it's all register accesses
1476  */
1477 static void qib_set_7220_armlaunch(struct qib_devdata *dd, u32 enable)
1478 {
1479         if (enable) {
1480                 qib_write_kreg(dd, kr_errclear, ERR_MASK(SendPioArmLaunchErr));
1481                 dd->cspec->errormask |= ERR_MASK(SendPioArmLaunchErr);
1482         } else
1483                 dd->cspec->errormask &= ~ERR_MASK(SendPioArmLaunchErr);
1484         qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
1485 }
1486
1487 /*
1488  * Formerly took parameter <which> in pre-shifted,
1489  * pre-merged form with LinkCmd and LinkInitCmd
1490  * together, and assuming the zero was NOP.
1491  */
1492 static void qib_set_ib_7220_lstate(struct qib_pportdata *ppd, u16 linkcmd,
1493                                    u16 linitcmd)
1494 {
1495         u64 mod_wd;
1496         struct qib_devdata *dd = ppd->dd;
1497         unsigned long flags;
1498
1499         if (linitcmd == QLOGIC_IB_IBCC_LINKINITCMD_DISABLE) {
1500                 /*
1501                  * If we are told to disable, note that so link-recovery
1502                  * code does not attempt to bring us back up.
1503                  */
1504                 spin_lock_irqsave(&ppd->lflags_lock, flags);
1505                 ppd->lflags |= QIBL_IB_LINK_DISABLED;
1506                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1507         } else if (linitcmd || linkcmd == QLOGIC_IB_IBCC_LINKCMD_DOWN) {
1508                 /*
1509                  * Any other linkinitcmd will lead to LINKDOWN and then
1510                  * to INIT (if all is well), so clear flag to let
1511                  * link-recovery code attempt to bring us back up.
1512                  */
1513                 spin_lock_irqsave(&ppd->lflags_lock, flags);
1514                 ppd->lflags &= ~QIBL_IB_LINK_DISABLED;
1515                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1516         }
1517
1518         mod_wd = (linkcmd << IBA7220_IBCC_LINKCMD_SHIFT) |
1519                 (linitcmd << QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
1520
1521         qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl | mod_wd);
1522         /* write to chip to prevent back-to-back writes of ibc reg */
1523         qib_write_kreg(dd, kr_scratch, 0);
1524 }
1525
1526 /*
1527  * All detailed interaction with the SerDes has been moved to qib_sd7220.c
1528  *
1529  * The portion of IBA7220-specific bringup_serdes() that actually deals with
1530  * registers and memory within the SerDes itself is qib_sd7220_init().
1531  */
1532
1533 /**
1534  * qib_7220_bringup_serdes - bring up the serdes
1535  * @ppd: physical port on the qlogic_ib device
1536  */
1537 static int qib_7220_bringup_serdes(struct qib_pportdata *ppd)
1538 {
1539         struct qib_devdata *dd = ppd->dd;
1540         u64 val, prev_val, guid, ibc;
1541         int ret = 0;
1542
1543         /* Put IBC in reset, sends disabled */
1544         dd->control &= ~QLOGIC_IB_C_LINKENABLE;
1545         qib_write_kreg(dd, kr_control, 0ULL);
1546
1547         if (qib_compat_ddr_negotiate) {
1548                 ppd->cpspec->ibdeltainprog = 1;
1549                 ppd->cpspec->ibsymsnap = read_7220_creg32(dd, cr_ibsymbolerr);
1550                 ppd->cpspec->iblnkerrsnap =
1551                         read_7220_creg32(dd, cr_iblinkerrrecov);
1552         }
1553
1554         /* flowcontrolwatermark is in units of KBytes */
1555         ibc = 0x5ULL << SYM_LSB(IBCCtrl, FlowCtrlWaterMark);
1556         /*
1557          * How often flowctrl sent.  More or less in usecs; balance against
1558          * watermark value, so that in theory senders always get a flow
1559          * control update in time to not let the IB link go idle.
1560          */
1561         ibc |= 0x3ULL << SYM_LSB(IBCCtrl, FlowCtrlPeriod);
1562         /* max error tolerance */
1563         ibc |= 0xfULL << SYM_LSB(IBCCtrl, PhyerrThreshold);
1564         /* use "real" buffer space for */
1565         ibc |= 4ULL << SYM_LSB(IBCCtrl, CreditScale);
1566         /* IB credit flow control. */
1567         ibc |= 0xfULL << SYM_LSB(IBCCtrl, OverrunThreshold);
1568         /*
1569          * set initial max size pkt IBC will send, including ICRC; it's the
1570          * PIO buffer size in dwords, less 1; also see qib_set_mtu()
1571          */
1572         ibc |= ((u64)(ppd->ibmaxlen >> 2) + 1) << SYM_LSB(IBCCtrl, MaxPktLen);
1573         ppd->cpspec->ibcctrl = ibc; /* without linkcmd or linkinitcmd! */
1574
1575         /* initially come up waiting for TS1, without sending anything. */
1576         val = ppd->cpspec->ibcctrl | (QLOGIC_IB_IBCC_LINKINITCMD_DISABLE <<
1577                 QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
1578         qib_write_kreg(dd, kr_ibcctrl, val);
1579
1580         if (!ppd->cpspec->ibcddrctrl) {
1581                 /* not on re-init after reset */
1582                 ppd->cpspec->ibcddrctrl = qib_read_kreg64(dd, kr_ibcddrctrl);
1583
1584                 if (ppd->link_speed_enabled == (QIB_IB_SDR | QIB_IB_DDR))
1585                         ppd->cpspec->ibcddrctrl |=
1586                                 IBA7220_IBC_SPEED_AUTONEG_MASK |
1587                                 IBA7220_IBC_IBTA_1_2_MASK;
1588                 else
1589                         ppd->cpspec->ibcddrctrl |=
1590                                 ppd->link_speed_enabled == QIB_IB_DDR ?
1591                                 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
1592                 if ((ppd->link_width_enabled & (IB_WIDTH_1X | IB_WIDTH_4X)) ==
1593                     (IB_WIDTH_1X | IB_WIDTH_4X))
1594                         ppd->cpspec->ibcddrctrl |= IBA7220_IBC_WIDTH_AUTONEG;
1595                 else
1596                         ppd->cpspec->ibcddrctrl |=
1597                                 ppd->link_width_enabled == IB_WIDTH_4X ?
1598                                 IBA7220_IBC_WIDTH_4X_ONLY :
1599                                 IBA7220_IBC_WIDTH_1X_ONLY;
1600
1601                 /* always enable these on driver reload, not sticky */
1602                 ppd->cpspec->ibcddrctrl |=
1603                         IBA7220_IBC_RXPOL_MASK << IBA7220_IBC_RXPOL_SHIFT;
1604                 ppd->cpspec->ibcddrctrl |=
1605                         IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
1606
1607                 /* enable automatic lane reversal detection for receive */
1608                 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_LANE_REV_SUPPORTED;
1609         } else
1610                 /* write to chip to prevent back-to-back writes of ibc reg */
1611                 qib_write_kreg(dd, kr_scratch, 0);
1612
1613         qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
1614         qib_write_kreg(dd, kr_scratch, 0);
1615
1616         qib_write_kreg(dd, kr_ncmodectrl, 0Ull);
1617         qib_write_kreg(dd, kr_scratch, 0);
1618
1619         ret = qib_sd7220_init(dd);
1620
1621         val = qib_read_kreg64(dd, kr_xgxs_cfg);
1622         prev_val = val;
1623         val |= QLOGIC_IB_XGXS_FC_SAFE;
1624         if (val != prev_val) {
1625                 qib_write_kreg(dd, kr_xgxs_cfg, val);
1626                 qib_read_kreg32(dd, kr_scratch);
1627         }
1628         if (val & QLOGIC_IB_XGXS_RESET)
1629                 val &= ~QLOGIC_IB_XGXS_RESET;
1630         if (val != prev_val)
1631                 qib_write_kreg(dd, kr_xgxs_cfg, val);
1632
1633         /* first time through, set port guid */
1634         if (!ppd->guid)
1635                 ppd->guid = dd->base_guid;
1636         guid = be64_to_cpu(ppd->guid);
1637
1638         qib_write_kreg(dd, kr_hrtbt_guid, guid);
1639         if (!ret) {
1640                 dd->control |= QLOGIC_IB_C_LINKENABLE;
1641                 qib_write_kreg(dd, kr_control, dd->control);
1642         } else
1643                 /* write to chip to prevent back-to-back writes of ibc reg */
1644                 qib_write_kreg(dd, kr_scratch, 0);
1645         return ret;
1646 }
1647
1648 /**
1649  * qib_7220_quiet_serdes - set serdes to txidle
1650  * @ppd: physical port of the qlogic_ib device
1651  * Called when driver is being unloaded
1652  */
1653 static void qib_7220_quiet_serdes(struct qib_pportdata *ppd)
1654 {
1655         u64 val;
1656         struct qib_devdata *dd = ppd->dd;
1657         unsigned long flags;
1658
1659         /* disable IBC */
1660         dd->control &= ~QLOGIC_IB_C_LINKENABLE;
1661         qib_write_kreg(dd, kr_control,
1662                        dd->control | QLOGIC_IB_C_FREEZEMODE);
1663
1664         ppd->cpspec->chase_end = 0;
1665         if (ppd->cpspec->chase_timer.data) /* if initted */
1666                 del_timer_sync(&ppd->cpspec->chase_timer);
1667
1668         if (ppd->cpspec->ibsymdelta || ppd->cpspec->iblnkerrdelta ||
1669             ppd->cpspec->ibdeltainprog) {
1670                 u64 diagc;
1671
1672                 /* enable counter writes */
1673                 diagc = qib_read_kreg64(dd, kr_hwdiagctrl);
1674                 qib_write_kreg(dd, kr_hwdiagctrl,
1675                                diagc | SYM_MASK(HwDiagCtrl, CounterWrEnable));
1676
1677                 if (ppd->cpspec->ibsymdelta || ppd->cpspec->ibdeltainprog) {
1678                         val = read_7220_creg32(dd, cr_ibsymbolerr);
1679                         if (ppd->cpspec->ibdeltainprog)
1680                                 val -= val - ppd->cpspec->ibsymsnap;
1681                         val -= ppd->cpspec->ibsymdelta;
1682                         write_7220_creg(dd, cr_ibsymbolerr, val);
1683                 }
1684                 if (ppd->cpspec->iblnkerrdelta || ppd->cpspec->ibdeltainprog) {
1685                         val = read_7220_creg32(dd, cr_iblinkerrrecov);
1686                         if (ppd->cpspec->ibdeltainprog)
1687                                 val -= val - ppd->cpspec->iblnkerrsnap;
1688                         val -= ppd->cpspec->iblnkerrdelta;
1689                         write_7220_creg(dd, cr_iblinkerrrecov, val);
1690                 }
1691
1692                 /* and disable counter writes */
1693                 qib_write_kreg(dd, kr_hwdiagctrl, diagc);
1694         }
1695         qib_set_ib_7220_lstate(ppd, 0, QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
1696
1697         spin_lock_irqsave(&ppd->lflags_lock, flags);
1698         ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
1699         spin_unlock_irqrestore(&ppd->lflags_lock, flags);
1700         wake_up(&ppd->cpspec->autoneg_wait);
1701         cancel_delayed_work_sync(&ppd->cpspec->autoneg_work);
1702
1703         shutdown_7220_relock_poll(ppd->dd);
1704         val = qib_read_kreg64(ppd->dd, kr_xgxs_cfg);
1705         val |= QLOGIC_IB_XGXS_RESET;
1706         qib_write_kreg(ppd->dd, kr_xgxs_cfg, val);
1707 }
1708
1709 /**
1710  * qib_setup_7220_setextled - set the state of the two external LEDs
1711  * @dd: the qlogic_ib device
1712  * @on: whether the link is up or not
1713  *
1714  * The exact combo of LEDs if on is true is determined by looking
1715  * at the ibcstatus.
1716  *
1717  * These LEDs indicate the physical and logical state of IB link.
1718  * For this chip (at least with recommended board pinouts), LED1
1719  * is Yellow (logical state) and LED2 is Green (physical state),
1720  *
1721  * Note:  We try to match the Mellanox HCA LED behavior as best
1722  * we can.  Green indicates physical link state is OK (something is
1723  * plugged in, and we can train).
1724  * Amber indicates the link is logically up (ACTIVE).
1725  * Mellanox further blinks the amber LED to indicate data packet
1726  * activity, but we have no hardware support for that, so it would
1727  * require waking up every 10-20 msecs and checking the counters
1728  * on the chip, and then turning the LED off if appropriate.  That's
1729  * visible overhead, so not something we will do.
1730  *
1731  */
1732 static void qib_setup_7220_setextled(struct qib_pportdata *ppd, u32 on)
1733 {
1734         struct qib_devdata *dd = ppd->dd;
1735         u64 extctl, ledblink = 0, val, lst, ltst;
1736         unsigned long flags;
1737
1738         /*
1739          * The diags use the LED to indicate diag info, so we leave
1740          * the external LED alone when the diags are running.
1741          */
1742         if (dd->diag_client)
1743                 return;
1744
1745         if (ppd->led_override) {
1746                 ltst = (ppd->led_override & QIB_LED_PHYS) ?
1747                         IB_PHYSPORTSTATE_LINKUP : IB_PHYSPORTSTATE_DISABLED,
1748                 lst = (ppd->led_override & QIB_LED_LOG) ?
1749                         IB_PORT_ACTIVE : IB_PORT_DOWN;
1750         } else if (on) {
1751                 val = qib_read_kreg64(dd, kr_ibcstatus);
1752                 ltst = qib_7220_phys_portstate(val);
1753                 lst = qib_7220_iblink_state(val);
1754         } else {
1755                 ltst = 0;
1756                 lst = 0;
1757         }
1758
1759         spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
1760         extctl = dd->cspec->extctrl & ~(SYM_MASK(EXTCtrl, LEDPriPortGreenOn) |
1761                                  SYM_MASK(EXTCtrl, LEDPriPortYellowOn));
1762         if (ltst == IB_PHYSPORTSTATE_LINKUP) {
1763                 extctl |= SYM_MASK(EXTCtrl, LEDPriPortGreenOn);
1764                 /*
1765                  * counts are in chip clock (4ns) periods.
1766                  * This is 1/16 sec (66.6ms) on,
1767                  * 3/16 sec (187.5 ms) off, with packets rcvd
1768                  */
1769                 ledblink = ((66600 * 1000UL / 4) << IBA7220_LEDBLINK_ON_SHIFT)
1770                         | ((187500 * 1000UL / 4) << IBA7220_LEDBLINK_OFF_SHIFT);
1771         }
1772         if (lst == IB_PORT_ACTIVE)
1773                 extctl |= SYM_MASK(EXTCtrl, LEDPriPortYellowOn);
1774         dd->cspec->extctrl = extctl;
1775         qib_write_kreg(dd, kr_extctrl, extctl);
1776         spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
1777
1778         if (ledblink) /* blink the LED on packet receive */
1779                 qib_write_kreg(dd, kr_rcvpktledcnt, ledblink);
1780 }
1781
1782 static void qib_7220_free_irq(struct qib_devdata *dd)
1783 {
1784         if (dd->cspec->irq) {
1785                 free_irq(dd->cspec->irq, dd);
1786                 dd->cspec->irq = 0;
1787         }
1788         qib_nomsi(dd);
1789 }
1790
1791 /*
1792  * qib_setup_7220_cleanup - clean up any per-chip chip-specific stuff
1793  * @dd: the qlogic_ib device
1794  *
1795  * This is called during driver unload.
1796  *
1797  */
1798 static void qib_setup_7220_cleanup(struct qib_devdata *dd)
1799 {
1800         qib_7220_free_irq(dd);
1801         kfree(dd->cspec->cntrs);
1802         kfree(dd->cspec->portcntrs);
1803 }
1804
1805 /*
1806  * This is only called for SDmaInt.
1807  * SDmaDisabled is handled on the error path.
1808  */
1809 static void sdma_7220_intr(struct qib_pportdata *ppd, u64 istat)
1810 {
1811         unsigned long flags;
1812
1813         spin_lock_irqsave(&ppd->sdma_lock, flags);
1814
1815         switch (ppd->sdma_state.current_state) {
1816         case qib_sdma_state_s00_hw_down:
1817                 break;
1818
1819         case qib_sdma_state_s10_hw_start_up_wait:
1820                 __qib_sdma_process_event(ppd, qib_sdma_event_e20_hw_started);
1821                 break;
1822
1823         case qib_sdma_state_s20_idle:
1824                 break;
1825
1826         case qib_sdma_state_s30_sw_clean_up_wait:
1827                 break;
1828
1829         case qib_sdma_state_s40_hw_clean_up_wait:
1830                 break;
1831
1832         case qib_sdma_state_s50_hw_halt_wait:
1833                 __qib_sdma_process_event(ppd, qib_sdma_event_e60_hw_halted);
1834                 break;
1835
1836         case qib_sdma_state_s99_running:
1837                 /* too chatty to print here */
1838                 __qib_sdma_intr(ppd);
1839                 break;
1840         }
1841         spin_unlock_irqrestore(&ppd->sdma_lock, flags);
1842 }
1843
1844 static void qib_wantpiobuf_7220_intr(struct qib_devdata *dd, u32 needint)
1845 {
1846         unsigned long flags;
1847
1848         spin_lock_irqsave(&dd->sendctrl_lock, flags);
1849         if (needint) {
1850                 if (!(dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
1851                         goto done;
1852                 /*
1853                  * blip the availupd off, next write will be on, so
1854                  * we ensure an avail update, regardless of threshold or
1855                  * buffers becoming free, whenever we want an interrupt
1856                  */
1857                 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl &
1858                         ~SYM_MASK(SendCtrl, SendBufAvailUpd));
1859                 qib_write_kreg(dd, kr_scratch, 0ULL);
1860                 dd->sendctrl |= SYM_MASK(SendCtrl, SendIntBufAvail);
1861         } else
1862                 dd->sendctrl &= ~SYM_MASK(SendCtrl, SendIntBufAvail);
1863         qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
1864         qib_write_kreg(dd, kr_scratch, 0ULL);
1865 done:
1866         spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
1867 }
1868
1869 /*
1870  * Handle errors and unusual events first, separate function
1871  * to improve cache hits for fast path interrupt handling.
1872  */
1873 static noinline void unlikely_7220_intr(struct qib_devdata *dd, u64 istat)
1874 {
1875         if (unlikely(istat & ~QLOGIC_IB_I_BITSEXTANT))
1876                 qib_dev_err(dd,
1877                             "interrupt with unknown interrupts %Lx set\n",
1878                             istat & ~QLOGIC_IB_I_BITSEXTANT);
1879
1880         if (istat & QLOGIC_IB_I_GPIO) {
1881                 u32 gpiostatus;
1882
1883                 /*
1884                  * Boards for this chip currently don't use GPIO interrupts,
1885                  * so clear by writing GPIOstatus to GPIOclear, and complain
1886                  * to alert developer. To avoid endless repeats, clear
1887                  * the bits in the mask, since there is some kind of
1888                  * programming error or chip problem.
1889                  */
1890                 gpiostatus = qib_read_kreg32(dd, kr_gpio_status);
1891                 /*
1892                  * In theory, writing GPIOstatus to GPIOclear could
1893                  * have a bad side-effect on some diagnostic that wanted
1894                  * to poll for a status-change, but the various shadows
1895                  * make that problematic at best. Diags will just suppress
1896                  * all GPIO interrupts during such tests.
1897                  */
1898                 qib_write_kreg(dd, kr_gpio_clear, gpiostatus);
1899
1900                 if (gpiostatus) {
1901                         const u32 mask = qib_read_kreg32(dd, kr_gpio_mask);
1902                         u32 gpio_irq = mask & gpiostatus;
1903
1904                         /*
1905                          * A bit set in status and (chip) Mask register
1906                          * would cause an interrupt. Since we are not
1907                          * expecting any, report it. Also check that the
1908                          * chip reflects our shadow, report issues,
1909                          * and refresh from the shadow.
1910                          */
1911                         /*
1912                          * Clear any troublemakers, and update chip
1913                          * from shadow
1914                          */
1915                         dd->cspec->gpio_mask &= ~gpio_irq;
1916                         qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
1917                 }
1918         }
1919
1920         if (istat & QLOGIC_IB_I_ERROR) {
1921                 u64 estat;
1922
1923                 qib_stats.sps_errints++;
1924                 estat = qib_read_kreg64(dd, kr_errstatus);
1925                 if (!estat)
1926                         qib_devinfo(dd->pcidev,
1927                                 "error interrupt (%Lx), but no error bits set!\n",
1928                                 istat);
1929                 else
1930                         handle_7220_errors(dd, estat);
1931         }
1932 }
1933
1934 static irqreturn_t qib_7220intr(int irq, void *data)
1935 {
1936         struct qib_devdata *dd = data;
1937         irqreturn_t ret;
1938         u64 istat;
1939         u64 ctxtrbits;
1940         u64 rmask;
1941         unsigned i;
1942
1943         if ((dd->flags & (QIB_PRESENT | QIB_BADINTR)) != QIB_PRESENT) {
1944                 /*
1945                  * This return value is not great, but we do not want the
1946                  * interrupt core code to remove our interrupt handler
1947                  * because we don't appear to be handling an interrupt
1948                  * during a chip reset.
1949                  */
1950                 ret = IRQ_HANDLED;
1951                 goto bail;
1952         }
1953
1954         istat = qib_read_kreg64(dd, kr_intstatus);
1955
1956         if (unlikely(!istat)) {
1957                 ret = IRQ_NONE; /* not our interrupt, or already handled */
1958                 goto bail;
1959         }
1960         if (unlikely(istat == -1)) {
1961                 qib_bad_intrstatus(dd);
1962                 /* don't know if it was our interrupt or not */
1963                 ret = IRQ_NONE;
1964                 goto bail;
1965         }
1966
1967         this_cpu_inc(*dd->int_counter);
1968         if (unlikely(istat & (~QLOGIC_IB_I_BITSEXTANT |
1969                               QLOGIC_IB_I_GPIO | QLOGIC_IB_I_ERROR)))
1970                 unlikely_7220_intr(dd, istat);
1971
1972         /*
1973          * Clear the interrupt bits we found set, relatively early, so we
1974          * "know" know the chip will have seen this by the time we process
1975          * the queue, and will re-interrupt if necessary.  The processor
1976          * itself won't take the interrupt again until we return.
1977          */
1978         qib_write_kreg(dd, kr_intclear, istat);
1979
1980         /*
1981          * Handle kernel receive queues before checking for pio buffers
1982          * available since receives can overflow; piobuf waiters can afford
1983          * a few extra cycles, since they were waiting anyway.
1984          */
1985         ctxtrbits = istat &
1986                 ((QLOGIC_IB_I_RCVAVAIL_MASK << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1987                  (QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT));
1988         if (ctxtrbits) {
1989                 rmask = (1ULL << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
1990                         (1ULL << QLOGIC_IB_I_RCVURG_SHIFT);
1991                 for (i = 0; i < dd->first_user_ctxt; i++) {
1992                         if (ctxtrbits & rmask) {
1993                                 ctxtrbits &= ~rmask;
1994                                 qib_kreceive(dd->rcd[i], NULL, NULL);
1995                         }
1996                         rmask <<= 1;
1997                 }
1998                 if (ctxtrbits) {
1999                         ctxtrbits =
2000                                 (ctxtrbits >> QLOGIC_IB_I_RCVAVAIL_SHIFT) |
2001                                 (ctxtrbits >> QLOGIC_IB_I_RCVURG_SHIFT);
2002                         qib_handle_urcv(dd, ctxtrbits);
2003                 }
2004         }
2005
2006         /* only call for SDmaInt */
2007         if (istat & QLOGIC_IB_I_SDMAINT)
2008                 sdma_7220_intr(dd->pport, istat);
2009
2010         if ((istat & QLOGIC_IB_I_SPIOBUFAVAIL) && (dd->flags & QIB_INITTED))
2011                 qib_ib_piobufavail(dd);
2012
2013         ret = IRQ_HANDLED;
2014 bail:
2015         return ret;
2016 }
2017
2018 /*
2019  * Set up our chip-specific interrupt handler.
2020  * The interrupt type has already been setup, so
2021  * we just need to do the registration and error checking.
2022  * If we are using MSI interrupts, we may fall back to
2023  * INTx later, if the interrupt handler doesn't get called
2024  * within 1/2 second (see verify_interrupt()).
2025  */
2026 static void qib_setup_7220_interrupt(struct qib_devdata *dd)
2027 {
2028         if (!dd->cspec->irq)
2029                 qib_dev_err(dd,
2030                         "irq is 0, BIOS error?  Interrupts won't work\n");
2031         else {
2032                 int ret = request_irq(dd->cspec->irq, qib_7220intr,
2033                         dd->msi_lo ? 0 : IRQF_SHARED,
2034                         QIB_DRV_NAME, dd);
2035
2036                 if (ret)
2037                         qib_dev_err(dd,
2038                                 "Couldn't setup %s interrupt (irq=%d): %d\n",
2039                                 dd->msi_lo ?  "MSI" : "INTx",
2040                                 dd->cspec->irq, ret);
2041         }
2042 }
2043
2044 /**
2045  * qib_7220_boardname - fill in the board name
2046  * @dd: the qlogic_ib device
2047  *
2048  * info is based on the board revision register
2049  */
2050 static void qib_7220_boardname(struct qib_devdata *dd)
2051 {
2052         char *n;
2053         u32 boardid, namelen;
2054
2055         boardid = SYM_FIELD(dd->revision, Revision,
2056                             BoardID);
2057
2058         switch (boardid) {
2059         case 1:
2060                 n = "InfiniPath_QLE7240";
2061                 break;
2062         case 2:
2063                 n = "InfiniPath_QLE7280";
2064                 break;
2065         default:
2066                 qib_dev_err(dd, "Unknown 7220 board with ID %u\n", boardid);
2067                 n = "Unknown_InfiniPath_7220";
2068                 break;
2069         }
2070
2071         namelen = strlen(n) + 1;
2072         dd->boardname = kmalloc(namelen, GFP_KERNEL);
2073         if (!dd->boardname)
2074                 qib_dev_err(dd, "Failed allocation for board name: %s\n", n);
2075         else
2076                 snprintf(dd->boardname, namelen, "%s", n);
2077
2078         if (dd->majrev != 5 || !dd->minrev || dd->minrev > 2)
2079                 qib_dev_err(dd,
2080                         "Unsupported InfiniPath hardware revision %u.%u!\n",
2081                         dd->majrev, dd->minrev);
2082
2083         snprintf(dd->boardversion, sizeof(dd->boardversion),
2084                  "ChipABI %u.%u, %s, InfiniPath%u %u.%u, SW Compat %u\n",
2085                  QIB_CHIP_VERS_MAJ, QIB_CHIP_VERS_MIN, dd->boardname,
2086                  (unsigned)SYM_FIELD(dd->revision, Revision_R, Arch),
2087                  dd->majrev, dd->minrev,
2088                  (unsigned)SYM_FIELD(dd->revision, Revision_R, SW));
2089 }
2090
2091 /*
2092  * This routine sleeps, so it can only be called from user context, not
2093  * from interrupt context.
2094  */
2095 static int qib_setup_7220_reset(struct qib_devdata *dd)
2096 {
2097         u64 val;
2098         int i;
2099         int ret;
2100         u16 cmdval;
2101         u8 int_line, clinesz;
2102         unsigned long flags;
2103
2104         qib_pcie_getcmd(dd, &cmdval, &int_line, &clinesz);
2105
2106         /* Use dev_err so it shows up in logs, etc. */
2107         qib_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->unit);
2108
2109         /* no interrupts till re-initted */
2110         qib_7220_set_intr_state(dd, 0);
2111
2112         dd->pport->cpspec->ibdeltainprog = 0;
2113         dd->pport->cpspec->ibsymdelta = 0;
2114         dd->pport->cpspec->iblnkerrdelta = 0;
2115
2116         /*
2117          * Keep chip from being accessed until we are ready.  Use
2118          * writeq() directly, to allow the write even though QIB_PRESENT
2119          * isn't set.
2120          */
2121         dd->flags &= ~(QIB_INITTED | QIB_PRESENT);
2122         /* so we check interrupts work again */
2123         dd->z_int_counter = qib_int_counter(dd);
2124         val = dd->control | QLOGIC_IB_C_RESET;
2125         writeq(val, &dd->kregbase[kr_control]);
2126         mb(); /* prevent compiler reordering around actual reset */
2127
2128         for (i = 1; i <= 5; i++) {
2129                 /*
2130                  * Allow MBIST, etc. to complete; longer on each retry.
2131                  * We sometimes get machine checks from bus timeout if no
2132                  * response, so for now, make it *really* long.
2133                  */
2134                 msleep(1000 + (1 + i) * 2000);
2135
2136                 qib_pcie_reenable(dd, cmdval, int_line, clinesz);
2137
2138                 /*
2139                  * Use readq directly, so we don't need to mark it as PRESENT
2140                  * until we get a successful indication that all is well.
2141                  */
2142                 val = readq(&dd->kregbase[kr_revision]);
2143                 if (val == dd->revision) {
2144                         dd->flags |= QIB_PRESENT; /* it's back */
2145                         ret = qib_reinit_intr(dd);
2146                         goto bail;
2147                 }
2148         }
2149         ret = 0; /* failed */
2150
2151 bail:
2152         if (ret) {
2153                 if (qib_pcie_params(dd, dd->lbus_width, NULL, NULL))
2154                         qib_dev_err(dd,
2155                                 "Reset failed to setup PCIe or interrupts; continuing anyway\n");
2156
2157                 /* hold IBC in reset, no sends, etc till later */
2158                 qib_write_kreg(dd, kr_control, 0ULL);
2159
2160                 /* clear the reset error, init error/hwerror mask */
2161                 qib_7220_init_hwerrors(dd);
2162
2163                 /* do setup similar to speed or link-width changes */
2164                 if (dd->pport->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK)
2165                         dd->cspec->presets_needed = 1;
2166                 spin_lock_irqsave(&dd->pport->lflags_lock, flags);
2167                 dd->pport->lflags |= QIBL_IB_FORCE_NOTIFY;
2168                 dd->pport->lflags &= ~QIBL_IB_AUTONEG_FAILED;
2169                 spin_unlock_irqrestore(&dd->pport->lflags_lock, flags);
2170         }
2171
2172         return ret;
2173 }
2174
2175 /**
2176  * qib_7220_put_tid - write a TID to the chip
2177  * @dd: the qlogic_ib device
2178  * @tidptr: pointer to the expected TID (in chip) to update
2179  * @tidtype: 0 for eager, 1 for expected
2180  * @pa: physical address of in memory buffer; tidinvalid if freeing
2181  */
2182 static void qib_7220_put_tid(struct qib_devdata *dd, u64 __iomem *tidptr,
2183                              u32 type, unsigned long pa)
2184 {
2185         if (pa != dd->tidinvalid) {
2186                 u64 chippa = pa >> IBA7220_TID_PA_SHIFT;
2187
2188                 /* paranoia checks */
2189                 if (pa != (chippa << IBA7220_TID_PA_SHIFT)) {
2190                         qib_dev_err(dd, "Physaddr %lx not 2KB aligned!\n",
2191                                     pa);
2192                         return;
2193                 }
2194                 if (chippa >= (1UL << IBA7220_TID_SZ_SHIFT)) {
2195                         qib_dev_err(dd,
2196                                 "Physical page address 0x%lx larger than supported\n",
2197                                 pa);
2198                         return;
2199                 }
2200
2201                 if (type == RCVHQ_RCV_TYPE_EAGER)
2202                         chippa |= dd->tidtemplate;
2203                 else /* for now, always full 4KB page */
2204                         chippa |= IBA7220_TID_SZ_4K;
2205                 pa = chippa;
2206         }
2207         writeq(pa, tidptr);
2208         mmiowb();
2209 }
2210
2211 /**
2212  * qib_7220_clear_tids - clear all TID entries for a ctxt, expected and eager
2213  * @dd: the qlogic_ib device
2214  * @ctxt: the ctxt
2215  *
2216  * clear all TID entries for a ctxt, expected and eager.
2217  * Used from qib_close().  On this chip, TIDs are only 32 bits,
2218  * not 64, but they are still on 64 bit boundaries, so tidbase
2219  * is declared as u64 * for the pointer math, even though we write 32 bits
2220  */
2221 static void qib_7220_clear_tids(struct qib_devdata *dd,
2222                                 struct qib_ctxtdata *rcd)
2223 {
2224         u64 __iomem *tidbase;
2225         unsigned long tidinv;
2226         u32 ctxt;
2227         int i;
2228
2229         if (!dd->kregbase || !rcd)
2230                 return;
2231
2232         ctxt = rcd->ctxt;
2233
2234         tidinv = dd->tidinvalid;
2235         tidbase = (u64 __iomem *)
2236                 ((char __iomem *)(dd->kregbase) +
2237                  dd->rcvtidbase +
2238                  ctxt * dd->rcvtidcnt * sizeof(*tidbase));
2239
2240         for (i = 0; i < dd->rcvtidcnt; i++)
2241                 qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
2242                                  tidinv);
2243
2244         tidbase = (u64 __iomem *)
2245                 ((char __iomem *)(dd->kregbase) +
2246                  dd->rcvegrbase +
2247                  rcd->rcvegr_tid_base * sizeof(*tidbase));
2248
2249         for (i = 0; i < rcd->rcvegrcnt; i++)
2250                 qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
2251                                  tidinv);
2252 }
2253
2254 /**
2255  * qib_7220_tidtemplate - setup constants for TID updates
2256  * @dd: the qlogic_ib device
2257  *
2258  * We setup stuff that we use a lot, to avoid calculating each time
2259  */
2260 static void qib_7220_tidtemplate(struct qib_devdata *dd)
2261 {
2262         if (dd->rcvegrbufsize == 2048)
2263                 dd->tidtemplate = IBA7220_TID_SZ_2K;
2264         else if (dd->rcvegrbufsize == 4096)
2265                 dd->tidtemplate = IBA7220_TID_SZ_4K;
2266         dd->tidinvalid = 0;
2267 }
2268
2269 /**
2270  * qib_init_7220_get_base_info - set chip-specific flags for user code
2271  * @rcd: the qlogic_ib ctxt
2272  * @kbase: qib_base_info pointer
2273  *
2274  * We set the PCIE flag because the lower bandwidth on PCIe vs
2275  * HyperTransport can affect some user packet algorithims.
2276  */
2277 static int qib_7220_get_base_info(struct qib_ctxtdata *rcd,
2278                                   struct qib_base_info *kinfo)
2279 {
2280         kinfo->spi_runtime_flags |= QIB_RUNTIME_PCIE |
2281                 QIB_RUNTIME_NODMA_RTAIL | QIB_RUNTIME_SDMA;
2282
2283         if (rcd->dd->flags & QIB_USE_SPCL_TRIG)
2284                 kinfo->spi_runtime_flags |= QIB_RUNTIME_SPECIAL_TRIGGER;
2285
2286         return 0;
2287 }
2288
2289 static struct qib_message_header *
2290 qib_7220_get_msgheader(struct qib_devdata *dd, __le32 *rhf_addr)
2291 {
2292         u32 offset = qib_hdrget_offset(rhf_addr);
2293
2294         return (struct qib_message_header *)
2295                 (rhf_addr - dd->rhf_offset + offset);
2296 }
2297
2298 static void qib_7220_config_ctxts(struct qib_devdata *dd)
2299 {
2300         unsigned long flags;
2301         u32 nchipctxts;
2302
2303         nchipctxts = qib_read_kreg32(dd, kr_portcnt);
2304         dd->cspec->numctxts = nchipctxts;
2305         if (qib_n_krcv_queues > 1) {
2306                 dd->qpn_mask = 0x3e;
2307                 dd->first_user_ctxt = qib_n_krcv_queues * dd->num_pports;
2308                 if (dd->first_user_ctxt > nchipctxts)
2309                         dd->first_user_ctxt = nchipctxts;
2310         } else
2311                 dd->first_user_ctxt = dd->num_pports;
2312         dd->n_krcv_queues = dd->first_user_ctxt;
2313
2314         if (!qib_cfgctxts) {
2315                 int nctxts = dd->first_user_ctxt + num_online_cpus();
2316
2317                 if (nctxts <= 5)
2318                         dd->ctxtcnt = 5;
2319                 else if (nctxts <= 9)
2320                         dd->ctxtcnt = 9;
2321                 else if (nctxts <= nchipctxts)
2322                         dd->ctxtcnt = nchipctxts;
2323         } else if (qib_cfgctxts <= nchipctxts)
2324                 dd->ctxtcnt = qib_cfgctxts;
2325         if (!dd->ctxtcnt) /* none of the above, set to max */
2326                 dd->ctxtcnt = nchipctxts;
2327
2328         /*
2329          * Chip can be configured for 5, 9, or 17 ctxts, and choice
2330          * affects number of eager TIDs per ctxt (1K, 2K, 4K).
2331          * Lock to be paranoid about later motion, etc.
2332          */
2333         spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
2334         if (dd->ctxtcnt > 9)
2335                 dd->rcvctrl |= 2ULL << IBA7220_R_CTXTCFG_SHIFT;
2336         else if (dd->ctxtcnt > 5)
2337                 dd->rcvctrl |= 1ULL << IBA7220_R_CTXTCFG_SHIFT;
2338         /* else configure for default 5 receive ctxts */
2339         if (dd->qpn_mask)
2340                 dd->rcvctrl |= 1ULL << QIB_7220_RcvCtrl_RcvQPMapEnable_LSB;
2341         qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
2342         spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
2343
2344         /* kr_rcvegrcnt changes based on the number of contexts enabled */
2345         dd->cspec->rcvegrcnt = qib_read_kreg32(dd, kr_rcvegrcnt);
2346         dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt, IBA7220_KRCVEGRCNT);
2347 }
2348
2349 static int qib_7220_get_ib_cfg(struct qib_pportdata *ppd, int which)
2350 {
2351         int lsb, ret = 0;
2352         u64 maskr; /* right-justified mask */
2353
2354         switch (which) {
2355         case QIB_IB_CFG_LWID_ENB: /* Get allowed Link-width */
2356                 ret = ppd->link_width_enabled;
2357                 goto done;
2358
2359         case QIB_IB_CFG_LWID: /* Get currently active Link-width */
2360                 ret = ppd->link_width_active;
2361                 goto done;
2362
2363         case QIB_IB_CFG_SPD_ENB: /* Get allowed Link speeds */
2364                 ret = ppd->link_speed_enabled;
2365                 goto done;
2366
2367         case QIB_IB_CFG_SPD: /* Get current Link spd */
2368                 ret = ppd->link_speed_active;
2369                 goto done;
2370
2371         case QIB_IB_CFG_RXPOL_ENB: /* Get Auto-RX-polarity enable */
2372                 lsb = IBA7220_IBC_RXPOL_SHIFT;
2373                 maskr = IBA7220_IBC_RXPOL_MASK;
2374                 break;
2375
2376         case QIB_IB_CFG_LREV_ENB: /* Get Auto-Lane-reversal enable */
2377                 lsb = IBA7220_IBC_LREV_SHIFT;
2378                 maskr = IBA7220_IBC_LREV_MASK;
2379                 break;
2380
2381         case QIB_IB_CFG_LINKLATENCY:
2382                 ret = qib_read_kreg64(ppd->dd, kr_ibcddrstatus)
2383                         & IBA7220_DDRSTAT_LINKLAT_MASK;
2384                 goto done;
2385
2386         case QIB_IB_CFG_OP_VLS:
2387                 ret = ppd->vls_operational;
2388                 goto done;
2389
2390         case QIB_IB_CFG_VL_HIGH_CAP:
2391                 ret = 0;
2392                 goto done;
2393
2394         case QIB_IB_CFG_VL_LOW_CAP:
2395                 ret = 0;
2396                 goto done;
2397
2398         case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
2399                 ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2400                                 OverrunThreshold);
2401                 goto done;
2402
2403         case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
2404                 ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2405                                 PhyerrThreshold);
2406                 goto done;
2407
2408         case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
2409                 /* will only take effect when the link state changes */
2410                 ret = (ppd->cpspec->ibcctrl &
2411                        SYM_MASK(IBCCtrl, LinkDownDefaultState)) ?
2412                         IB_LINKINITCMD_SLEEP : IB_LINKINITCMD_POLL;
2413                 goto done;
2414
2415         case QIB_IB_CFG_HRTBT: /* Get Heartbeat off/enable/auto */
2416                 lsb = IBA7220_IBC_HRTBT_SHIFT;
2417                 maskr = IBA7220_IBC_HRTBT_MASK;
2418                 break;
2419
2420         case QIB_IB_CFG_PMA_TICKS:
2421                 /*
2422                  * 0x00 = 10x link transfer rate or 4 nsec. for 2.5Gbs
2423                  * Since the clock is always 250MHz, the value is 1 or 0.
2424                  */
2425                 ret = (ppd->link_speed_active == QIB_IB_DDR);
2426                 goto done;
2427
2428         default:
2429                 ret = -EINVAL;
2430                 goto done;
2431         }
2432         ret = (int)((ppd->cpspec->ibcddrctrl >> lsb) & maskr);
2433 done:
2434         return ret;
2435 }
2436
2437 static int qib_7220_set_ib_cfg(struct qib_pportdata *ppd, int which, u32 val)
2438 {
2439         struct qib_devdata *dd = ppd->dd;
2440         u64 maskr; /* right-justified mask */
2441         int lsb, ret = 0, setforce = 0;
2442         u16 lcmd, licmd;
2443         unsigned long flags;
2444         u32 tmp = 0;
2445
2446         switch (which) {
2447         case QIB_IB_CFG_LIDLMC:
2448                 /*
2449                  * Set LID and LMC. Combined to avoid possible hazard
2450                  * caller puts LMC in 16MSbits, DLID in 16LSbits of val
2451                  */
2452                 lsb = IBA7220_IBC_DLIDLMC_SHIFT;
2453                 maskr = IBA7220_IBC_DLIDLMC_MASK;
2454                 break;
2455
2456         case QIB_IB_CFG_LWID_ENB: /* set allowed Link-width */
2457                 /*
2458                  * As with speed, only write the actual register if
2459                  * the link is currently down, otherwise takes effect
2460                  * on next link change.
2461                  */
2462                 ppd->link_width_enabled = val;
2463                 if (!(ppd->lflags & QIBL_LINKDOWN))
2464                         goto bail;
2465                 /*
2466                  * We set the QIBL_IB_FORCE_NOTIFY bit so updown
2467                  * will get called because we want update
2468                  * link_width_active, and the change may not take
2469                  * effect for some time (if we are in POLL), so this
2470                  * flag will force the updown routine to be called
2471                  * on the next ibstatuschange down interrupt, even
2472                  * if it's not an down->up transition.
2473                  */
2474                 val--; /* convert from IB to chip */
2475                 maskr = IBA7220_IBC_WIDTH_MASK;
2476                 lsb = IBA7220_IBC_WIDTH_SHIFT;
2477                 setforce = 1;
2478                 break;
2479
2480         case QIB_IB_CFG_SPD_ENB: /* set allowed Link speeds */
2481                 /*
2482                  * If we turn off IB1.2, need to preset SerDes defaults,
2483                  * but not right now. Set a flag for the next time
2484                  * we command the link down.  As with width, only write the
2485                  * actual register if the link is currently down, otherwise
2486                  * takes effect on next link change.  Since setting is being
2487                  * explicitly requested (via MAD or sysfs), clear autoneg
2488                  * failure status if speed autoneg is enabled.
2489                  */
2490                 ppd->link_speed_enabled = val;
2491                 if ((ppd->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK) &&
2492                     !(val & (val - 1)))
2493                         dd->cspec->presets_needed = 1;
2494                 if (!(ppd->lflags & QIBL_LINKDOWN))
2495                         goto bail;
2496                 /*
2497                  * We set the QIBL_IB_FORCE_NOTIFY bit so updown
2498                  * will get called because we want update
2499                  * link_speed_active, and the change may not take
2500                  * effect for some time (if we are in POLL), so this
2501                  * flag will force the updown routine to be called
2502                  * on the next ibstatuschange down interrupt, even
2503                  * if it's not an down->up transition.
2504                  */
2505                 if (val == (QIB_IB_SDR | QIB_IB_DDR)) {
2506                         val = IBA7220_IBC_SPEED_AUTONEG_MASK |
2507                                 IBA7220_IBC_IBTA_1_2_MASK;
2508                         spin_lock_irqsave(&ppd->lflags_lock, flags);
2509                         ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
2510                         spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2511                 } else
2512                         val = val == QIB_IB_DDR ?
2513                                 IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
2514                 maskr = IBA7220_IBC_SPEED_AUTONEG_MASK |
2515                         IBA7220_IBC_IBTA_1_2_MASK;
2516                 /* IBTA 1.2 mode + speed bits are contiguous */
2517                 lsb = SYM_LSB(IBCDDRCtrl, IB_ENHANCED_MODE);
2518                 setforce = 1;
2519                 break;
2520
2521         case QIB_IB_CFG_RXPOL_ENB: /* set Auto-RX-polarity enable */
2522                 lsb = IBA7220_IBC_RXPOL_SHIFT;
2523                 maskr = IBA7220_IBC_RXPOL_MASK;
2524                 break;
2525
2526         case QIB_IB_CFG_LREV_ENB: /* set Auto-Lane-reversal enable */
2527                 lsb = IBA7220_IBC_LREV_SHIFT;
2528                 maskr = IBA7220_IBC_LREV_MASK;
2529                 break;
2530
2531         case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
2532                 maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2533                                   OverrunThreshold);
2534                 if (maskr != val) {
2535                         ppd->cpspec->ibcctrl &=
2536                                 ~SYM_MASK(IBCCtrl, OverrunThreshold);
2537                         ppd->cpspec->ibcctrl |= (u64) val <<
2538                                 SYM_LSB(IBCCtrl, OverrunThreshold);
2539                         qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2540                         qib_write_kreg(dd, kr_scratch, 0);
2541                 }
2542                 goto bail;
2543
2544         case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
2545                 maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
2546                                   PhyerrThreshold);
2547                 if (maskr != val) {
2548                         ppd->cpspec->ibcctrl &=
2549                                 ~SYM_MASK(IBCCtrl, PhyerrThreshold);
2550                         ppd->cpspec->ibcctrl |= (u64) val <<
2551                                 SYM_LSB(IBCCtrl, PhyerrThreshold);
2552                         qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2553                         qib_write_kreg(dd, kr_scratch, 0);
2554                 }
2555                 goto bail;
2556
2557         case QIB_IB_CFG_PKEYS: /* update pkeys */
2558                 maskr = (u64) ppd->pkeys[0] | ((u64) ppd->pkeys[1] << 16) |
2559                         ((u64) ppd->pkeys[2] << 32) |
2560                         ((u64) ppd->pkeys[3] << 48);
2561                 qib_write_kreg(dd, kr_partitionkey, maskr);
2562                 goto bail;
2563
2564         case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
2565                 /* will only take effect when the link state changes */
2566                 if (val == IB_LINKINITCMD_POLL)
2567                         ppd->cpspec->ibcctrl &=
2568                                 ~SYM_MASK(IBCCtrl, LinkDownDefaultState);
2569                 else /* SLEEP */
2570                         ppd->cpspec->ibcctrl |=
2571                                 SYM_MASK(IBCCtrl, LinkDownDefaultState);
2572                 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2573                 qib_write_kreg(dd, kr_scratch, 0);
2574                 goto bail;
2575
2576         case QIB_IB_CFG_MTU: /* update the MTU in IBC */
2577                 /*
2578                  * Update our housekeeping variables, and set IBC max
2579                  * size, same as init code; max IBC is max we allow in
2580                  * buffer, less the qword pbc, plus 1 for ICRC, in dwords
2581                  * Set even if it's unchanged, print debug message only
2582                  * on changes.
2583                  */
2584                 val = (ppd->ibmaxlen >> 2) + 1;
2585                 ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, MaxPktLen);
2586                 ppd->cpspec->ibcctrl |= (u64)val << SYM_LSB(IBCCtrl, MaxPktLen);
2587                 qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2588                 qib_write_kreg(dd, kr_scratch, 0);
2589                 goto bail;
2590
2591         case QIB_IB_CFG_LSTATE: /* set the IB link state */
2592                 switch (val & 0xffff0000) {
2593                 case IB_LINKCMD_DOWN:
2594                         lcmd = QLOGIC_IB_IBCC_LINKCMD_DOWN;
2595                         if (!ppd->cpspec->ibdeltainprog &&
2596                             qib_compat_ddr_negotiate) {
2597                                 ppd->cpspec->ibdeltainprog = 1;
2598                                 ppd->cpspec->ibsymsnap =
2599                                         read_7220_creg32(dd, cr_ibsymbolerr);
2600                                 ppd->cpspec->iblnkerrsnap =
2601                                         read_7220_creg32(dd, cr_iblinkerrrecov);
2602                         }
2603                         break;
2604
2605                 case IB_LINKCMD_ARMED:
2606                         lcmd = QLOGIC_IB_IBCC_LINKCMD_ARMED;
2607                         break;
2608
2609                 case IB_LINKCMD_ACTIVE:
2610                         lcmd = QLOGIC_IB_IBCC_LINKCMD_ACTIVE;
2611                         break;
2612
2613                 default:
2614                         ret = -EINVAL;
2615                         qib_dev_err(dd, "bad linkcmd req 0x%x\n", val >> 16);
2616                         goto bail;
2617                 }
2618                 switch (val & 0xffff) {
2619                 case IB_LINKINITCMD_NOP:
2620                         licmd = 0;
2621                         break;
2622
2623                 case IB_LINKINITCMD_POLL:
2624                         licmd = QLOGIC_IB_IBCC_LINKINITCMD_POLL;
2625                         break;
2626
2627                 case IB_LINKINITCMD_SLEEP:
2628                         licmd = QLOGIC_IB_IBCC_LINKINITCMD_SLEEP;
2629                         break;
2630
2631                 case IB_LINKINITCMD_DISABLE:
2632                         licmd = QLOGIC_IB_IBCC_LINKINITCMD_DISABLE;
2633                         ppd->cpspec->chase_end = 0;
2634                         /*
2635                          * stop state chase counter and timer, if running.
2636                          * wait forpending timer, but don't clear .data (ppd)!
2637                          */
2638                         if (ppd->cpspec->chase_timer.expires) {
2639                                 del_timer_sync(&ppd->cpspec->chase_timer);
2640                                 ppd->cpspec->chase_timer.expires = 0;
2641                         }
2642                         break;
2643
2644                 default:
2645                         ret = -EINVAL;
2646                         qib_dev_err(dd, "bad linkinitcmd req 0x%x\n",
2647                                     val & 0xffff);
2648                         goto bail;
2649                 }
2650                 qib_set_ib_7220_lstate(ppd, lcmd, licmd);
2651
2652                 maskr = IBA7220_IBC_WIDTH_MASK;
2653                 lsb = IBA7220_IBC_WIDTH_SHIFT;
2654                 tmp = (ppd->cpspec->ibcddrctrl >> lsb) & maskr;
2655                 /* If the width active on the chip does not match the
2656                  * width in the shadow register, write the new active
2657                  * width to the chip.
2658                  * We don't have to worry about speed as the speed is taken
2659                  * care of by set_7220_ibspeed_fast called by ib_updown.
2660                  */
2661                 if (ppd->link_width_enabled-1 != tmp) {
2662                         ppd->cpspec->ibcddrctrl &= ~(maskr << lsb);
2663                         ppd->cpspec->ibcddrctrl |=
2664                                 (((u64)(ppd->link_width_enabled-1) & maskr) <<
2665                                  lsb);
2666                         qib_write_kreg(dd, kr_ibcddrctrl,
2667                                        ppd->cpspec->ibcddrctrl);
2668                         qib_write_kreg(dd, kr_scratch, 0);
2669                         spin_lock_irqsave(&ppd->lflags_lock, flags);
2670                         ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
2671                         spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2672                 }
2673                 goto bail;
2674
2675         case QIB_IB_CFG_HRTBT: /* set Heartbeat off/enable/auto */
2676                 if (val > IBA7220_IBC_HRTBT_MASK) {
2677                         ret = -EINVAL;
2678                         goto bail;
2679                 }
2680                 lsb = IBA7220_IBC_HRTBT_SHIFT;
2681                 maskr = IBA7220_IBC_HRTBT_MASK;
2682                 break;
2683
2684         default:
2685                 ret = -EINVAL;
2686                 goto bail;
2687         }
2688         ppd->cpspec->ibcddrctrl &= ~(maskr << lsb);
2689         ppd->cpspec->ibcddrctrl |= (((u64) val & maskr) << lsb);
2690         qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
2691         qib_write_kreg(dd, kr_scratch, 0);
2692         if (setforce) {
2693                 spin_lock_irqsave(&ppd->lflags_lock, flags);
2694                 ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
2695                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
2696         }
2697 bail:
2698         return ret;
2699 }
2700
2701 static int qib_7220_set_loopback(struct qib_pportdata *ppd, const char *what)
2702 {
2703         int ret = 0;
2704         u64 val, ddr;
2705
2706         if (!strncmp(what, "ibc", 3)) {
2707                 ppd->cpspec->ibcctrl |= SYM_MASK(IBCCtrl, Loopback);
2708                 val = 0; /* disable heart beat, so link will come up */
2709                 qib_devinfo(ppd->dd->pcidev, "Enabling IB%u:%u IBC loopback\n",
2710                          ppd->dd->unit, ppd->port);
2711         } else if (!strncmp(what, "off", 3)) {
2712                 ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, Loopback);
2713                 /* enable heart beat again */
2714                 val = IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
2715                 qib_devinfo(ppd->dd->pcidev,
2716                         "Disabling IB%u:%u IBC loopback (normal)\n",
2717                         ppd->dd->unit, ppd->port);
2718         } else
2719                 ret = -EINVAL;
2720         if (!ret) {
2721                 qib_write_kreg(ppd->dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
2722                 ddr = ppd->cpspec->ibcddrctrl & ~(IBA7220_IBC_HRTBT_MASK
2723                                              << IBA7220_IBC_HRTBT_SHIFT);
2724                 ppd->cpspec->ibcddrctrl = ddr | val;
2725                 qib_write_kreg(ppd->dd, kr_ibcddrctrl,
2726                                ppd->cpspec->ibcddrctrl);
2727                 qib_write_kreg(ppd->dd, kr_scratch, 0);
2728         }
2729         return ret;
2730 }
2731
2732 static void qib_update_7220_usrhead(struct qib_ctxtdata *rcd, u64 hd,
2733                                     u32 updegr, u32 egrhd, u32 npkts)
2734 {
2735         if (updegr)
2736                 qib_write_ureg(rcd->dd, ur_rcvegrindexhead, egrhd, rcd->ctxt);
2737         mmiowb();
2738         qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
2739         mmiowb();
2740 }
2741
2742 static u32 qib_7220_hdrqempty(struct qib_ctxtdata *rcd)
2743 {
2744         u32 head, tail;
2745
2746         head = qib_read_ureg32(rcd->dd, ur_rcvhdrhead, rcd->ctxt);
2747         if (rcd->rcvhdrtail_kvaddr)
2748                 tail = qib_get_rcvhdrtail(rcd);
2749         else
2750                 tail = qib_read_ureg32(rcd->dd, ur_rcvhdrtail, rcd->ctxt);
2751         return head == tail;
2752 }
2753
2754 /*
2755  * Modify the RCVCTRL register in chip-specific way. This
2756  * is a function because bit positions and (future) register
2757  * location is chip-specifc, but the needed operations are
2758  * generic. <op> is a bit-mask because we often want to
2759  * do multiple modifications.
2760  */
2761 static void rcvctrl_7220_mod(struct qib_pportdata *ppd, unsigned int op,
2762                              int ctxt)
2763 {
2764         struct qib_devdata *dd = ppd->dd;
2765         u64 mask, val;
2766         unsigned long flags;
2767
2768         spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
2769         if (op & QIB_RCVCTRL_TAILUPD_ENB)
2770                 dd->rcvctrl |= (1ULL << IBA7220_R_TAILUPD_SHIFT);
2771         if (op & QIB_RCVCTRL_TAILUPD_DIS)
2772                 dd->rcvctrl &= ~(1ULL << IBA7220_R_TAILUPD_SHIFT);
2773         if (op & QIB_RCVCTRL_PKEY_ENB)
2774                 dd->rcvctrl &= ~(1ULL << IBA7220_R_PKEY_DIS_SHIFT);
2775         if (op & QIB_RCVCTRL_PKEY_DIS)
2776                 dd->rcvctrl |= (1ULL << IBA7220_R_PKEY_DIS_SHIFT);
2777         if (ctxt < 0)
2778                 mask = (1ULL << dd->ctxtcnt) - 1;
2779         else
2780                 mask = (1ULL << ctxt);
2781         if (op & QIB_RCVCTRL_CTXT_ENB) {
2782                 /* always done for specific ctxt */
2783                 dd->rcvctrl |= (mask << SYM_LSB(RcvCtrl, PortEnable));
2784                 if (!(dd->flags & QIB_NODMA_RTAIL))
2785                         dd->rcvctrl |= 1ULL << IBA7220_R_TAILUPD_SHIFT;
2786                 /* Write these registers before the context is enabled. */
2787                 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt,
2788                         dd->rcd[ctxt]->rcvhdrqtailaddr_phys);
2789                 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt,
2790                         dd->rcd[ctxt]->rcvhdrq_phys);
2791                 dd->rcd[ctxt]->seq_cnt = 1;
2792         }
2793         if (op & QIB_RCVCTRL_CTXT_DIS)
2794                 dd->rcvctrl &= ~(mask << SYM_LSB(RcvCtrl, PortEnable));
2795         if (op & QIB_RCVCTRL_INTRAVAIL_ENB)
2796                 dd->rcvctrl |= (mask << IBA7220_R_INTRAVAIL_SHIFT);
2797         if (op & QIB_RCVCTRL_INTRAVAIL_DIS)
2798                 dd->rcvctrl &= ~(mask << IBA7220_R_INTRAVAIL_SHIFT);
2799         qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
2800         if ((op & QIB_RCVCTRL_INTRAVAIL_ENB) && dd->rhdrhead_intr_off) {
2801                 /* arm rcv interrupt */
2802                 val = qib_read_ureg32(dd, ur_rcvhdrhead, ctxt) |
2803                         dd->rhdrhead_intr_off;
2804                 qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
2805         }
2806         if (op & QIB_RCVCTRL_CTXT_ENB) {
2807                 /*
2808                  * Init the context registers also; if we were
2809                  * disabled, tail and head should both be zero
2810                  * already from the enable, but since we don't
2811                  * know, we have to do it explicitly.
2812                  */
2813                 val = qib_read_ureg32(dd, ur_rcvegrindextail, ctxt);
2814                 qib_write_ureg(dd, ur_rcvegrindexhead, val, ctxt);
2815
2816                 val = qib_read_ureg32(dd, ur_rcvhdrtail, ctxt);
2817                 dd->rcd[ctxt]->head = val;
2818                 /* If kctxt, interrupt on next receive. */
2819                 if (ctxt < dd->first_user_ctxt)
2820                         val |= dd->rhdrhead_intr_off;
2821                 qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
2822         }
2823         if (op & QIB_RCVCTRL_CTXT_DIS) {
2824                 if (ctxt >= 0) {
2825                         qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt, 0);
2826                         qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt, 0);
2827                 } else {
2828                         unsigned i;
2829
2830                         for (i = 0; i < dd->cfgctxts; i++) {
2831                                 qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr,
2832                                                     i, 0);
2833                                 qib_write_kreg_ctxt(dd, kr_rcvhdraddr, i, 0);
2834                         }
2835                 }
2836         }
2837         spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
2838 }
2839
2840 /*
2841  * Modify the SENDCTRL register in chip-specific way. This
2842  * is a function there may be multiple such registers with
2843  * slightly different layouts. To start, we assume the
2844  * "canonical" register layout of the first chips.
2845  * Chip requires no back-back sendctrl writes, so write
2846  * scratch register after writing sendctrl
2847  */
2848 static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op)
2849 {
2850         struct qib_devdata *dd = ppd->dd;
2851         u64 tmp_dd_sendctrl;
2852         unsigned long flags;
2853
2854         spin_lock_irqsave(&dd->sendctrl_lock, flags);
2855
2856         /* First the ones that are "sticky", saved in shadow */
2857         if (op & QIB_SENDCTRL_CLEAR)
2858                 dd->sendctrl = 0;
2859         if (op & QIB_SENDCTRL_SEND_DIS)
2860                 dd->sendctrl &= ~SYM_MASK(SendCtrl, SPioEnable);
2861         else if (op & QIB_SENDCTRL_SEND_ENB) {
2862                 dd->sendctrl |= SYM_MASK(SendCtrl, SPioEnable);
2863                 if (dd->flags & QIB_USE_SPCL_TRIG)
2864                         dd->sendctrl |= SYM_MASK(SendCtrl,
2865                                                  SSpecialTriggerEn);
2866         }
2867         if (op & QIB_SENDCTRL_AVAIL_DIS)
2868                 dd->sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
2869         else if (op & QIB_SENDCTRL_AVAIL_ENB)
2870                 dd->sendctrl |= SYM_MASK(SendCtrl, SendBufAvailUpd);
2871
2872         if (op & QIB_SENDCTRL_DISARM_ALL) {
2873                 u32 i, last;
2874
2875                 tmp_dd_sendctrl = dd->sendctrl;
2876                 /*
2877                  * disarm any that are not yet launched, disabling sends
2878                  * and updates until done.
2879                  */
2880                 last = dd->piobcnt2k + dd->piobcnt4k;
2881                 tmp_dd_sendctrl &=
2882                         ~(SYM_MASK(SendCtrl, SPioEnable) |
2883                           SYM_MASK(SendCtrl, SendBufAvailUpd));
2884                 for (i = 0; i < last; i++) {
2885                         qib_write_kreg(dd, kr_sendctrl,
2886                                        tmp_dd_sendctrl |
2887                                        SYM_MASK(SendCtrl, Disarm) | i);
2888                         qib_write_kreg(dd, kr_scratch, 0);
2889                 }
2890         }
2891
2892         tmp_dd_sendctrl = dd->sendctrl;
2893
2894         if (op & QIB_SENDCTRL_FLUSH)
2895                 tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Abort);
2896         if (op & QIB_SENDCTRL_DISARM)
2897                 tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Disarm) |
2898                         ((op & QIB_7220_SendCtrl_DisarmPIOBuf_RMASK) <<
2899                          SYM_LSB(SendCtrl, DisarmPIOBuf));
2900         if ((op & QIB_SENDCTRL_AVAIL_BLIP) &&
2901             (dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
2902                 tmp_dd_sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
2903
2904         qib_write_kreg(dd, kr_sendctrl, tmp_dd_sendctrl);
2905         qib_write_kreg(dd, kr_scratch, 0);
2906
2907         if (op & QIB_SENDCTRL_AVAIL_BLIP) {
2908                 qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
2909                 qib_write_kreg(dd, kr_scratch, 0);
2910         }
2911
2912         spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
2913
2914         if (op & QIB_SENDCTRL_FLUSH) {
2915                 u32 v;
2916                 /*
2917                  * ensure writes have hit chip, then do a few
2918                  * more reads, to allow DMA of pioavail registers
2919                  * to occur, so in-memory copy is in sync with
2920                  * the chip.  Not always safe to sleep.
2921                  */
2922                 v = qib_read_kreg32(dd, kr_scratch);
2923                 qib_write_kreg(dd, kr_scratch, v);
2924                 v = qib_read_kreg32(dd, kr_scratch);
2925                 qib_write_kreg(dd, kr_scratch, v);
2926                 qib_read_kreg32(dd, kr_scratch);
2927         }
2928 }
2929
2930 /**
2931  * qib_portcntr_7220 - read a per-port counter
2932  * @dd: the qlogic_ib device
2933  * @creg: the counter to snapshot
2934  */
2935 static u64 qib_portcntr_7220(struct qib_pportdata *ppd, u32 reg)
2936 {
2937         u64 ret = 0ULL;
2938         struct qib_devdata *dd = ppd->dd;
2939         u16 creg;
2940         /* 0xffff for unimplemented or synthesized counters */
2941         static const u16 xlator[] = {
2942                 [QIBPORTCNTR_PKTSEND] = cr_pktsend,
2943                 [QIBPORTCNTR_WORDSEND] = cr_wordsend,
2944                 [QIBPORTCNTR_PSXMITDATA] = cr_psxmitdatacount,
2945                 [QIBPORTCNTR_PSXMITPKTS] = cr_psxmitpktscount,
2946                 [QIBPORTCNTR_PSXMITWAIT] = cr_psxmitwaitcount,
2947                 [QIBPORTCNTR_SENDSTALL] = cr_sendstall,
2948                 [QIBPORTCNTR_PKTRCV] = cr_pktrcv,
2949                 [QIBPORTCNTR_PSRCVDATA] = cr_psrcvdatacount,
2950                 [QIBPORTCNTR_PSRCVPKTS] = cr_psrcvpktscount,
2951                 [QIBPORTCNTR_RCVEBP] = cr_rcvebp,
2952                 [QIBPORTCNTR_RCVOVFL] = cr_rcvovfl,
2953                 [QIBPORTCNTR_WORDRCV] = cr_wordrcv,
2954                 [QIBPORTCNTR_RXDROPPKT] = cr_rxdroppkt,
2955                 [QIBPORTCNTR_RXLOCALPHYERR] = cr_rxotherlocalphyerr,
2956                 [QIBPORTCNTR_RXVLERR] = cr_rxvlerr,
2957                 [QIBPORTCNTR_ERRICRC] = cr_erricrc,
2958                 [QIBPORTCNTR_ERRVCRC] = cr_errvcrc,
2959                 [QIBPORTCNTR_ERRLPCRC] = cr_errlpcrc,
2960                 [QIBPORTCNTR_BADFORMAT] = cr_badformat,
2961                 [QIBPORTCNTR_ERR_RLEN] = cr_err_rlen,
2962                 [QIBPORTCNTR_IBSYMBOLERR] = cr_ibsymbolerr,
2963                 [QIBPORTCNTR_INVALIDRLEN] = cr_invalidrlen,
2964                 [QIBPORTCNTR_UNSUPVL] = cr_txunsupvl,
2965                 [QIBPORTCNTR_EXCESSBUFOVFL] = cr_excessbufferovfl,
2966                 [QIBPORTCNTR_ERRLINK] = cr_errlink,
2967                 [QIBPORTCNTR_IBLINKDOWN] = cr_iblinkdown,
2968                 [QIBPORTCNTR_IBLINKERRRECOV] = cr_iblinkerrrecov,
2969                 [QIBPORTCNTR_LLI] = cr_locallinkintegrityerr,
2970                 [QIBPORTCNTR_PSINTERVAL] = cr_psinterval,
2971                 [QIBPORTCNTR_PSSTART] = cr_psstart,
2972                 [QIBPORTCNTR_PSSTAT] = cr_psstat,
2973                 [QIBPORTCNTR_VL15PKTDROP] = cr_vl15droppedpkt,
2974                 [QIBPORTCNTR_ERRPKEY] = cr_errpkey,
2975                 [QIBPORTCNTR_KHDROVFL] = 0xffff,
2976         };
2977
2978         if (reg >= ARRAY_SIZE(xlator)) {
2979                 qib_devinfo(ppd->dd->pcidev,
2980                          "Unimplemented portcounter %u\n", reg);
2981                 goto done;
2982         }
2983         creg = xlator[reg];
2984
2985         if (reg == QIBPORTCNTR_KHDROVFL) {
2986                 int i;
2987
2988                 /* sum over all kernel contexts */
2989                 for (i = 0; i < dd->first_user_ctxt; i++)
2990                         ret += read_7220_creg32(dd, cr_portovfl + i);
2991         }
2992         if (creg == 0xffff)
2993                 goto done;
2994
2995         /*
2996          * only fast incrementing counters are 64bit; use 32 bit reads to
2997          * avoid two independent reads when on opteron
2998          */
2999         if ((creg == cr_wordsend || creg == cr_wordrcv ||
3000              creg == cr_pktsend || creg == cr_pktrcv))
3001                 ret = read_7220_creg(dd, creg);
3002         else
3003                 ret = read_7220_creg32(dd, creg);
3004         if (creg == cr_ibsymbolerr) {
3005                 if (dd->pport->cpspec->ibdeltainprog)
3006                         ret -= ret - ppd->cpspec->ibsymsnap;
3007                 ret -= dd->pport->cpspec->ibsymdelta;
3008         } else if (creg == cr_iblinkerrrecov) {
3009                 if (dd->pport->cpspec->ibdeltainprog)
3010                         ret -= ret - ppd->cpspec->iblnkerrsnap;
3011                 ret -= dd->pport->cpspec->iblnkerrdelta;
3012         }
3013 done:
3014         return ret;
3015 }
3016
3017 /*
3018  * Device counter names (not port-specific), one line per stat,
3019  * single string.  Used by utilities like ipathstats to print the stats
3020  * in a way which works for different versions of drivers, without changing
3021  * the utility.  Names need to be 12 chars or less (w/o newline), for proper
3022  * display by utility.
3023  * Non-error counters are first.
3024  * Start of "error" conters is indicated by a leading "E " on the first
3025  * "error" counter, and doesn't count in label length.
3026  * The EgrOvfl list needs to be last so we truncate them at the configured
3027  * context count for the device.
3028  * cntr7220indices contains the corresponding register indices.
3029  */
3030 static const char cntr7220names[] =
3031         "Interrupts\n"
3032         "HostBusStall\n"
3033         "E RxTIDFull\n"
3034         "RxTIDInvalid\n"
3035         "Ctxt0EgrOvfl\n"
3036         "Ctxt1EgrOvfl\n"
3037         "Ctxt2EgrOvfl\n"
3038         "Ctxt3EgrOvfl\n"
3039         "Ctxt4EgrOvfl\n"
3040         "Ctxt5EgrOvfl\n"
3041         "Ctxt6EgrOvfl\n"
3042         "Ctxt7EgrOvfl\n"
3043         "Ctxt8EgrOvfl\n"
3044         "Ctxt9EgrOvfl\n"
3045         "Ctx10EgrOvfl\n"
3046         "Ctx11EgrOvfl\n"
3047         "Ctx12EgrOvfl\n"
3048         "Ctx13EgrOvfl\n"
3049         "Ctx14EgrOvfl\n"
3050         "Ctx15EgrOvfl\n"
3051         "Ctx16EgrOvfl\n";
3052
3053 static const size_t cntr7220indices[] = {
3054         cr_lbint,
3055         cr_lbflowstall,
3056         cr_errtidfull,
3057         cr_errtidvalid,
3058         cr_portovfl + 0,
3059         cr_portovfl + 1,
3060         cr_portovfl + 2,
3061         cr_portovfl + 3,
3062         cr_portovfl + 4,
3063         cr_portovfl + 5,
3064         cr_portovfl + 6,
3065         cr_portovfl + 7,
3066         cr_portovfl + 8,
3067         cr_portovfl + 9,
3068         cr_portovfl + 10,
3069         cr_portovfl + 11,
3070         cr_portovfl + 12,
3071         cr_portovfl + 13,
3072         cr_portovfl + 14,
3073         cr_portovfl + 15,
3074         cr_portovfl + 16,
3075 };
3076
3077 /*
3078  * same as cntr7220names and cntr7220indices, but for port-specific counters.
3079  * portcntr7220indices is somewhat complicated by some registers needing
3080  * adjustments of various kinds, and those are ORed with _PORT_VIRT_FLAG
3081  */
3082 static const char portcntr7220names[] =
3083         "TxPkt\n"
3084         "TxFlowPkt\n"
3085         "TxWords\n"
3086         "RxPkt\n"
3087         "RxFlowPkt\n"
3088         "RxWords\n"
3089         "TxFlowStall\n"
3090         "TxDmaDesc\n"  /* 7220 and 7322-only */
3091         "E RxDlidFltr\n"  /* 7220 and 7322-only */
3092         "IBStatusChng\n"
3093         "IBLinkDown\n"
3094         "IBLnkRecov\n"
3095         "IBRxLinkErr\n"
3096         "IBSymbolErr\n"
3097         "RxLLIErr\n"
3098         "RxBadFormat\n"
3099         "RxBadLen\n"
3100         "RxBufOvrfl\n"
3101         "RxEBP\n"
3102         "RxFlowCtlErr\n"
3103         "RxICRCerr\n"
3104         "RxLPCRCerr\n"
3105         "RxVCRCerr\n"
3106         "RxInvalLen\n"
3107         "RxInvalPKey\n"
3108         "RxPktDropped\n"
3109         "TxBadLength\n"
3110         "TxDropped\n"
3111         "TxInvalLen\n"
3112         "TxUnderrun\n"
3113         "TxUnsupVL\n"
3114         "RxLclPhyErr\n" /* 7220 and 7322-only */
3115         "RxVL15Drop\n" /* 7220 and 7322-only */
3116         "RxVlErr\n" /* 7220 and 7322-only */
3117         "XcessBufOvfl\n" /* 7220 and 7322-only */
3118         ;
3119
3120 #define _PORT_VIRT_FLAG 0x8000 /* "virtual", need adjustments */
3121 static const size_t portcntr7220indices[] = {
3122         QIBPORTCNTR_PKTSEND | _PORT_VIRT_FLAG,
3123         cr_pktsendflow,
3124         QIBPORTCNTR_WORDSEND | _PORT_VIRT_FLAG,
3125         QIBPORTCNTR_PKTRCV | _PORT_VIRT_FLAG,
3126         cr_pktrcvflowctrl,
3127         QIBPORTCNTR_WORDRCV | _PORT_VIRT_FLAG,
3128         QIBPORTCNTR_SENDSTALL | _PORT_VIRT_FLAG,
3129         cr_txsdmadesc,
3130         cr_rxdlidfltr,
3131         cr_ibstatuschange,
3132         QIBPORTCNTR_IBLINKDOWN | _PORT_VIRT_FLAG,
3133         QIBPORTCNTR_IBLINKERRRECOV | _PORT_VIRT_FLAG,
3134         QIBPORTCNTR_ERRLINK | _PORT_VIRT_FLAG,
3135         QIBPORTCNTR_IBSYMBOLERR | _PORT_VIRT_FLAG,
3136         QIBPORTCNTR_LLI | _PORT_VIRT_FLAG,
3137         QIBPORTCNTR_BADFORMAT | _PORT_VIRT_FLAG,
3138         QIBPORTCNTR_ERR_RLEN | _PORT_VIRT_FLAG,
3139         QIBPORTCNTR_RCVOVFL | _PORT_VIRT_FLAG,
3140         QIBPORTCNTR_RCVEBP | _PORT_VIRT_FLAG,
3141         cr_rcvflowctrl_err,
3142         QIBPORTCNTR_ERRICRC | _PORT_VIRT_FLAG,
3143         QIBPORTCNTR_ERRLPCRC | _PORT_VIRT_FLAG,
3144         QIBPORTCNTR_ERRVCRC | _PORT_VIRT_FLAG,
3145         QIBPORTCNTR_INVALIDRLEN | _PORT_VIRT_FLAG,
3146         QIBPORTCNTR_ERRPKEY | _PORT_VIRT_FLAG,
3147         QIBPORTCNTR_RXDROPPKT | _PORT_VIRT_FLAG,
3148         cr_invalidslen,
3149         cr_senddropped,
3150         cr_errslen,
3151         cr_sendunderrun,
3152         cr_txunsupvl,
3153         QIBPORTCNTR_RXLOCALPHYERR | _PORT_VIRT_FLAG,
3154         QIBPORTCNTR_VL15PKTDROP | _PORT_VIRT_FLAG,
3155         QIBPORTCNTR_RXVLERR | _PORT_VIRT_FLAG,
3156         QIBPORTCNTR_EXCESSBUFOVFL | _PORT_VIRT_FLAG,
3157 };
3158
3159 /* do all the setup to make the counter reads efficient later */
3160 static void init_7220_cntrnames(struct qib_devdata *dd)
3161 {
3162         int i, j = 0;
3163         char *s;
3164
3165         for (i = 0, s = (char *)cntr7220names; s && j <= dd->cfgctxts;
3166              i++) {
3167                 /* we always have at least one counter before the egrovfl */
3168                 if (!j && !strncmp("Ctxt0EgrOvfl", s + 1, 12))
3169                         j = 1;
3170                 s = strchr(s + 1, '\n');
3171                 if (s && j)
3172                         j++;
3173         }
3174         dd->cspec->ncntrs = i;
3175         if (!s)
3176                 /* full list; size is without terminating null */
3177                 dd->cspec->cntrnamelen = sizeof(cntr7220names) - 1;
3178         else
3179                 dd->cspec->cntrnamelen = 1 + s - cntr7220names;
3180         dd->cspec->cntrs = kmalloc(dd->cspec->ncntrs
3181                 * sizeof(u64), GFP_KERNEL);
3182         if (!dd->cspec->cntrs)
3183                 qib_dev_err(dd, "Failed allocation for counters\n");
3184
3185         for (i = 0, s = (char *)portcntr7220names; s; i++)
3186                 s = strchr(s + 1, '\n');
3187         dd->cspec->nportcntrs = i - 1;
3188         dd->cspec->portcntrnamelen = sizeof(portcntr7220names) - 1;
3189         dd->cspec->portcntrs = kmalloc(dd->cspec->nportcntrs
3190                 * sizeof(u64), GFP_KERNEL);
3191         if (!dd->cspec->portcntrs)
3192                 qib_dev_err(dd, "Failed allocation for portcounters\n");
3193 }
3194
3195 static u32 qib_read_7220cntrs(struct qib_devdata *dd, loff_t pos, char **namep,
3196                               u64 **cntrp)
3197 {
3198         u32 ret;
3199
3200         if (!dd->cspec->cntrs) {
3201                 ret = 0;
3202                 goto done;
3203         }
3204
3205         if (namep) {
3206                 *namep = (char *)cntr7220names;
3207                 ret = dd->cspec->cntrnamelen;
3208                 if (pos >= ret)
3209                         ret = 0; /* final read after getting everything */
3210         } else {
3211                 u64 *cntr = dd->cspec->cntrs;
3212                 int i;
3213
3214                 ret = dd->cspec->ncntrs * sizeof(u64);
3215                 if (!cntr || pos >= ret) {
3216                         /* everything read, or couldn't get memory */
3217                         ret = 0;
3218                         goto done;
3219                 }
3220
3221                 *cntrp = cntr;
3222                 for (i = 0; i < dd->cspec->ncntrs; i++)
3223                         *cntr++ = read_7220_creg32(dd, cntr7220indices[i]);
3224         }
3225 done:
3226         return ret;
3227 }
3228
3229 static u32 qib_read_7220portcntrs(struct qib_devdata *dd, loff_t pos, u32 port,
3230                                   char **namep, u64 **cntrp)
3231 {
3232         u32 ret;
3233
3234         if (!dd->cspec->portcntrs) {
3235                 ret = 0;
3236                 goto done;
3237         }
3238         if (namep) {
3239                 *namep = (char *)portcntr7220names;
3240                 ret = dd->cspec->portcntrnamelen;
3241                 if (pos >= ret)
3242                         ret = 0; /* final read after getting everything */
3243         } else {
3244                 u64 *cntr = dd->cspec->portcntrs;
3245                 struct qib_pportdata *ppd = &dd->pport[port];
3246                 int i;
3247
3248                 ret = dd->cspec->nportcntrs * sizeof(u64);
3249                 if (!cntr || pos >= ret) {
3250                         /* everything read, or couldn't get memory */
3251                         ret = 0;
3252                         goto done;
3253                 }
3254                 *cntrp = cntr;
3255                 for (i = 0; i < dd->cspec->nportcntrs; i++) {
3256                         if (portcntr7220indices[i] & _PORT_VIRT_FLAG)
3257                                 *cntr++ = qib_portcntr_7220(ppd,
3258                                         portcntr7220indices[i] &
3259                                         ~_PORT_VIRT_FLAG);
3260                         else
3261                                 *cntr++ = read_7220_creg32(dd,
3262                                            portcntr7220indices[i]);
3263                 }
3264         }
3265 done:
3266         return ret;
3267 }
3268
3269 /**
3270  * qib_get_7220_faststats - get word counters from chip before they overflow
3271  * @opaque - contains a pointer to the qlogic_ib device qib_devdata
3272  *
3273  * This needs more work; in particular, decision on whether we really
3274  * need traffic_wds done the way it is
3275  * called from add_timer
3276  */
3277 static void qib_get_7220_faststats(unsigned long opaque)
3278 {
3279         struct qib_devdata *dd = (struct qib_devdata *) opaque;
3280         struct qib_pportdata *ppd = dd->pport;
3281         unsigned long flags;
3282         u64 traffic_wds;
3283
3284         /*
3285          * don't access the chip while running diags, or memory diags can
3286          * fail
3287          */
3288         if (!(dd->flags & QIB_INITTED) || dd->diag_client)
3289                 /* but re-arm the timer, for diags case; won't hurt other */
3290                 goto done;
3291
3292         /*
3293          * We now try to maintain an activity timer, based on traffic
3294          * exceeding a threshold, so we need to check the word-counts
3295          * even if they are 64-bit.
3296          */
3297         traffic_wds = qib_portcntr_7220(ppd, cr_wordsend) +
3298                 qib_portcntr_7220(ppd, cr_wordrcv);
3299         spin_lock_irqsave(&dd->eep_st_lock, flags);
3300         traffic_wds -= dd->traffic_wds;
3301         dd->traffic_wds += traffic_wds;
3302         spin_unlock_irqrestore(&dd->eep_st_lock, flags);
3303 done:
3304         mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
3305 }
3306
3307 /*
3308  * If we are using MSI, try to fallback to INTx.
3309  */
3310 static int qib_7220_intr_fallback(struct qib_devdata *dd)
3311 {
3312         if (!dd->msi_lo)
3313                 return 0;
3314
3315         qib_devinfo(dd->pcidev,
3316                 "MSI interrupt not detected, trying INTx interrupts\n");
3317         qib_7220_free_irq(dd);
3318         qib_enable_intx(dd->pcidev);
3319         /*
3320          * Some newer kernels require free_irq before disable_msi,
3321          * and irq can be changed during disable and INTx enable
3322          * and we need to therefore use the pcidev->irq value,
3323          * not our saved MSI value.
3324          */
3325         dd->cspec->irq = dd->pcidev->irq;
3326         qib_setup_7220_interrupt(dd);
3327         return 1;
3328 }
3329
3330 /*
3331  * Reset the XGXS (between serdes and IBC).  Slightly less intrusive
3332  * than resetting the IBC or external link state, and useful in some
3333  * cases to cause some retraining.  To do this right, we reset IBC
3334  * as well.
3335  */
3336 static void qib_7220_xgxs_reset(struct qib_pportdata *ppd)
3337 {
3338         u64 val, prev_val;
3339         struct qib_devdata *dd = ppd->dd;
3340
3341         prev_val = qib_read_kreg64(dd, kr_xgxs_cfg);
3342         val = prev_val | QLOGIC_IB_XGXS_RESET;
3343         prev_val &= ~QLOGIC_IB_XGXS_RESET; /* be sure */
3344         qib_write_kreg(dd, kr_control,
3345                        dd->control & ~QLOGIC_IB_C_LINKENABLE);
3346         qib_write_kreg(dd, kr_xgxs_cfg, val);
3347         qib_read_kreg32(dd, kr_scratch);
3348         qib_write_kreg(dd, kr_xgxs_cfg, prev_val);
3349         qib_write_kreg(dd, kr_control, dd->control);
3350 }
3351
3352 /*
3353  * For this chip, we want to use the same buffer every time
3354  * when we are trying to bring the link up (they are always VL15
3355  * packets).  At that link state the packet should always go out immediately
3356  * (or at least be discarded at the tx interface if the link is down).
3357  * If it doesn't, and the buffer isn't available, that means some other
3358  * sender has gotten ahead of us, and is preventing our packet from going
3359  * out.  In that case, we flush all packets, and try again.  If that still
3360  * fails, we fail the request, and hope things work the next time around.
3361  *
3362  * We don't need very complicated heuristics on whether the packet had
3363  * time to go out or not, since even at SDR 1X, it goes out in very short
3364  * time periods, covered by the chip reads done here and as part of the
3365  * flush.
3366  */
3367 static u32 __iomem *get_7220_link_buf(struct qib_pportdata *ppd, u32 *bnum)
3368 {
3369         u32 __iomem *buf;
3370         u32 lbuf = ppd->dd->cspec->lastbuf_for_pio;
3371         int do_cleanup;
3372         unsigned long flags;
3373
3374         /*
3375          * always blip to get avail list updated, since it's almost
3376          * always needed, and is fairly cheap.
3377          */
3378         sendctrl_7220_mod(ppd->dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
3379         qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
3380         buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
3381         if (buf)
3382                 goto done;
3383
3384         spin_lock_irqsave(&ppd->sdma_lock, flags);
3385         if (ppd->sdma_state.current_state == qib_sdma_state_s20_idle &&
3386             ppd->sdma_state.current_state != qib_sdma_state_s00_hw_down) {
3387                 __qib_sdma_process_event(ppd, qib_sdma_event_e00_go_hw_down);
3388                 do_cleanup = 0;
3389         } else {
3390                 do_cleanup = 1;
3391                 qib_7220_sdma_hw_clean_up(ppd);
3392         }
3393         spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3394
3395         if (do_cleanup) {
3396                 qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
3397                 buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
3398         }
3399 done:
3400         return buf;
3401 }
3402
3403 /*
3404  * This code for non-IBTA-compliant IB speed negotiation is only known to
3405  * work for the SDR to DDR transition, and only between an HCA and a switch
3406  * with recent firmware.  It is based on observed heuristics, rather than
3407  * actual knowledge of the non-compliant speed negotiation.
3408  * It has a number of hard-coded fields, since the hope is to rewrite this
3409  * when a spec is available on how the negoation is intended to work.
3410  */
3411 static void autoneg_7220_sendpkt(struct qib_pportdata *ppd, u32 *hdr,
3412                                  u32 dcnt, u32 *data)
3413 {
3414         int i;
3415         u64 pbc;
3416         u32 __iomem *piobuf;
3417         u32 pnum;
3418         struct qib_devdata *dd = ppd->dd;
3419
3420         i = 0;
3421         pbc = 7 + dcnt + 1; /* 7 dword header, dword data, icrc */
3422         pbc |= PBC_7220_VL15_SEND;
3423         while (!(piobuf = get_7220_link_buf(ppd, &pnum))) {
3424                 if (i++ > 5)
3425                         return;
3426                 udelay(2);
3427         }
3428         sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_DISARM_BUF(pnum));
3429         writeq(pbc, piobuf);
3430         qib_flush_wc();
3431         qib_pio_copy(piobuf + 2, hdr, 7);
3432         qib_pio_copy(piobuf + 9, data, dcnt);
3433         if (dd->flags & QIB_USE_SPCL_TRIG) {
3434                 u32 spcl_off = (pnum >= dd->piobcnt2k) ? 2047 : 1023;
3435
3436                 qib_flush_wc();
3437                 __raw_writel(0xaebecede, piobuf + spcl_off);
3438         }
3439         qib_flush_wc();
3440         qib_sendbuf_done(dd, pnum);
3441 }
3442
3443 /*
3444  * _start packet gets sent twice at start, _done gets sent twice at end
3445  */
3446 static void autoneg_7220_send(struct qib_pportdata *ppd, int which)
3447 {
3448         struct qib_devdata *dd = ppd->dd;
3449         static u32 swapped;
3450         u32 dw, i, hcnt, dcnt, *data;
3451         static u32 hdr[7] = { 0xf002ffff, 0x48ffff, 0x6400abba };
3452         static u32 madpayload_start[0x40] = {
3453                 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
3454                 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
3455                 0x1, 0x1388, 0x15e, 0x1, /* rest 0's */
3456                 };
3457         static u32 madpayload_done[0x40] = {
3458                 0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
3459                 0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
3460                 0x40000001, 0x1388, 0x15e, /* rest 0's */
3461                 };
3462
3463         dcnt = ARRAY_SIZE(madpayload_start);
3464         hcnt = ARRAY_SIZE(hdr);
3465         if (!swapped) {
3466                 /* for maintainability, do it at runtime */
3467                 for (i = 0; i < hcnt; i++) {
3468                         dw = (__force u32) cpu_to_be32(hdr[i]);
3469                         hdr[i] = dw;
3470                 }
3471                 for (i = 0; i < dcnt; i++) {
3472                         dw = (__force u32) cpu_to_be32(madpayload_start[i]);
3473                         madpayload_start[i] = dw;
3474                         dw = (__force u32) cpu_to_be32(madpayload_done[i]);
3475                         madpayload_done[i] = dw;
3476                 }
3477                 swapped = 1;
3478         }
3479
3480         data = which ? madpayload_done : madpayload_start;
3481
3482         autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
3483         qib_read_kreg64(dd, kr_scratch);
3484         udelay(2);
3485         autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
3486         qib_read_kreg64(dd, kr_scratch);
3487         udelay(2);
3488 }
3489
3490 /*
3491  * Do the absolute minimum to cause an IB speed change, and make it
3492  * ready, but don't actually trigger the change.   The caller will
3493  * do that when ready (if link is in Polling training state, it will
3494  * happen immediately, otherwise when link next goes down)
3495  *
3496  * This routine should only be used as part of the DDR autonegotation
3497  * code for devices that are not compliant with IB 1.2 (or code that
3498  * fixes things up for same).
3499  *
3500  * When link has gone down, and autoneg enabled, or autoneg has
3501  * failed and we give up until next time we set both speeds, and
3502  * then we want IBTA enabled as well as "use max enabled speed.
3503  */
3504 static void set_7220_ibspeed_fast(struct qib_pportdata *ppd, u32 speed)
3505 {
3506         ppd->cpspec->ibcddrctrl &= ~(IBA7220_IBC_SPEED_AUTONEG_MASK |
3507                 IBA7220_IBC_IBTA_1_2_MASK);
3508
3509         if (speed == (QIB_IB_SDR | QIB_IB_DDR))
3510                 ppd->cpspec->ibcddrctrl |= IBA7220_IBC_SPEED_AUTONEG_MASK |
3511                         IBA7220_IBC_IBTA_1_2_MASK;
3512         else
3513                 ppd->cpspec->ibcddrctrl |= speed == QIB_IB_DDR ?
3514                         IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
3515
3516         qib_write_kreg(ppd->dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
3517         qib_write_kreg(ppd->dd, kr_scratch, 0);
3518 }
3519
3520 /*
3521  * This routine is only used when we are not talking to another
3522  * IB 1.2-compliant device that we think can do DDR.
3523  * (This includes all existing switch chips as of Oct 2007.)
3524  * 1.2-compliant devices go directly to DDR prior to reaching INIT
3525  */
3526 static void try_7220_autoneg(struct qib_pportdata *ppd)
3527 {
3528         unsigned long flags;
3529
3530         /*
3531          * Required for older non-IB1.2 DDR switches.  Newer
3532          * non-IB-compliant switches don't need it, but so far,
3533          * aren't bothered by it either.  "Magic constant"
3534          */
3535         qib_write_kreg(ppd->dd, kr_ncmodectrl, 0x3b9dc07);
3536
3537         spin_lock_irqsave(&ppd->lflags_lock, flags);
3538         ppd->lflags |= QIBL_IB_AUTONEG_INPROG;
3539         spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3540         autoneg_7220_send(ppd, 0);
3541         set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
3542
3543         toggle_7220_rclkrls(ppd->dd);
3544         /* 2 msec is minimum length of a poll cycle */
3545         queue_delayed_work(ib_wq, &ppd->cpspec->autoneg_work,
3546                            msecs_to_jiffies(2));
3547 }
3548
3549 /*
3550  * Handle the empirically determined mechanism for auto-negotiation
3551  * of DDR speed with switches.
3552  */
3553 static void autoneg_7220_work(struct work_struct *work)
3554 {
3555         struct qib_pportdata *ppd;
3556         struct qib_devdata *dd;
3557         u64 startms;
3558         u32 i;
3559         unsigned long flags;
3560
3561         ppd = &container_of(work, struct qib_chippport_specific,
3562                             autoneg_work.work)->pportdata;
3563         dd = ppd->dd;
3564
3565         startms = jiffies_to_msecs(jiffies);
3566
3567         /*
3568          * Busy wait for this first part, it should be at most a
3569          * few hundred usec, since we scheduled ourselves for 2msec.
3570          */
3571         for (i = 0; i < 25; i++) {
3572                 if (SYM_FIELD(ppd->lastibcstat, IBCStatus, LinkTrainingState)
3573                      == IB_7220_LT_STATE_POLLQUIET) {
3574                         qib_set_linkstate(ppd, QIB_IB_LINKDOWN_DISABLE);
3575                         break;
3576                 }
3577                 udelay(100);
3578         }
3579
3580         if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
3581                 goto done; /* we got there early or told to stop */
3582
3583         /* we expect this to timeout */
3584         if (wait_event_timeout(ppd->cpspec->autoneg_wait,
3585                                !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3586                                msecs_to_jiffies(90)))
3587                 goto done;
3588
3589         toggle_7220_rclkrls(dd);
3590
3591         /* we expect this to timeout */
3592         if (wait_event_timeout(ppd->cpspec->autoneg_wait,
3593                                !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3594                                msecs_to_jiffies(1700)))
3595                 goto done;
3596
3597         set_7220_ibspeed_fast(ppd, QIB_IB_SDR);
3598         toggle_7220_rclkrls(dd);
3599
3600         /*
3601          * Wait up to 250 msec for link to train and get to INIT at DDR;
3602          * this should terminate early.
3603          */
3604         wait_event_timeout(ppd->cpspec->autoneg_wait,
3605                 !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
3606                 msecs_to_jiffies(250));
3607 done:
3608         if (ppd->lflags & QIBL_IB_AUTONEG_INPROG) {
3609                 spin_lock_irqsave(&ppd->lflags_lock, flags);
3610                 ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
3611                 if (dd->cspec->autoneg_tries == AUTONEG_TRIES) {
3612                         ppd->lflags |= QIBL_IB_AUTONEG_FAILED;
3613                         dd->cspec->autoneg_tries = 0;
3614                 }
3615                 spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3616                 set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
3617         }
3618 }
3619
3620 static u32 qib_7220_iblink_state(u64 ibcs)
3621 {
3622         u32 state = (u32)SYM_FIELD(ibcs, IBCStatus, LinkState);
3623
3624         switch (state) {
3625         case IB_7220_L_STATE_INIT:
3626                 state = IB_PORT_INIT;
3627                 break;
3628         case IB_7220_L_STATE_ARM:
3629                 state = IB_PORT_ARMED;
3630                 break;
3631         case IB_7220_L_STATE_ACTIVE:
3632                 /* fall through */
3633         case IB_7220_L_STATE_ACT_DEFER:
3634                 state = IB_PORT_ACTIVE;
3635                 break;
3636         default: /* fall through */
3637         case IB_7220_L_STATE_DOWN:
3638                 state = IB_PORT_DOWN;
3639                 break;
3640         }
3641         return state;
3642 }
3643
3644 /* returns the IBTA port state, rather than the IBC link training state */
3645 static u8 qib_7220_phys_portstate(u64 ibcs)
3646 {
3647         u8 state = (u8)SYM_FIELD(ibcs, IBCStatus, LinkTrainingState);
3648         return qib_7220_physportstate[state];
3649 }
3650
3651 static int qib_7220_ib_updown(struct qib_pportdata *ppd, int ibup, u64 ibcs)
3652 {
3653         int ret = 0, symadj = 0;
3654         struct qib_devdata *dd = ppd->dd;
3655         unsigned long flags;
3656
3657         spin_lock_irqsave(&ppd->lflags_lock, flags);
3658         ppd->lflags &= ~QIBL_IB_FORCE_NOTIFY;
3659         spin_unlock_irqrestore(&ppd->lflags_lock, flags);
3660
3661         if (!ibup) {
3662                 /*
3663                  * When the link goes down we don't want AEQ running, so it
3664                  * won't interfere with IBC training, etc., and we need
3665                  * to go back to the static SerDes preset values.
3666                  */
3667                 if (!(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
3668                                      QIBL_IB_AUTONEG_INPROG)))
3669                         set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
3670                 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
3671                         qib_sd7220_presets(dd);
3672                         qib_cancel_sends(ppd); /* initial disarm, etc. */
3673                         spin_lock_irqsave(&ppd->sdma_lock, flags);
3674                         if (__qib_sdma_running(ppd))
3675                                 __qib_sdma_process_event(ppd,
3676                                         qib_sdma_event_e70_go_idle);
3677                         spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3678                 }
3679                 /* this might better in qib_sd7220_presets() */
3680                 set_7220_relock_poll(dd, ibup);
3681         } else {
3682                 if (qib_compat_ddr_negotiate &&
3683                     !(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
3684                                      QIBL_IB_AUTONEG_INPROG)) &&
3685                     ppd->link_speed_active == QIB_IB_SDR &&
3686                     (ppd->link_speed_enabled & (QIB_IB_DDR | QIB_IB_SDR)) ==
3687                     (QIB_IB_DDR | QIB_IB_SDR) &&
3688                     dd->cspec->autoneg_tries < AUTONEG_TRIES) {
3689                         /* we are SDR, and DDR auto-negotiation enabled */
3690                         ++dd->cspec->autoneg_tries;
3691                         if (!ppd->cpspec->ibdeltainprog) {
3692                                 ppd->cpspec->ibdeltainprog = 1;
3693                                 ppd->cpspec->ibsymsnap = read_7220_creg32(dd,
3694                                         cr_ibsymbolerr);
3695                                 ppd->cpspec->iblnkerrsnap = read_7220_creg32(dd,
3696                                         cr_iblinkerrrecov);
3697                         }
3698                         try_7220_autoneg(ppd);
3699                         ret = 1; /* no other IB status change processing */
3700                 } else if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
3701                            ppd->link_speed_active == QIB_IB_SDR) {
3702                         autoneg_7220_send(ppd, 1);
3703                         set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
3704                         udelay(2);
3705                         toggle_7220_rclkrls(dd);
3706                         ret = 1; /* no other IB status change processing */
3707                 } else {
3708                         if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
3709                             (ppd->link_speed_active & QIB_IB_DDR)) {
3710                                 spin_lock_irqsave(&ppd->lflags_lock, flags);
3711                                 ppd->lflags &= ~(QIBL_IB_AUTONEG_INPROG |
3712                                                  QIBL_IB_AUTONEG_FAILED);
3713                                 spin_unlock_irqrestore(&ppd->lflags_lock,
3714                                                        flags);
3715                                 dd->cspec->autoneg_tries = 0;
3716                                 /* re-enable SDR, for next link down */
3717                                 set_7220_ibspeed_fast(ppd,
3718                                                       ppd->link_speed_enabled);
3719                                 wake_up(&ppd->cpspec->autoneg_wait);
3720                                 symadj = 1;
3721                         } else if (ppd->lflags & QIBL_IB_AUTONEG_FAILED) {
3722                                 /*
3723                                  * Clear autoneg failure flag, and do setup
3724                                  * so we'll try next time link goes down and
3725                                  * back to INIT (possibly connected to a
3726                                  * different device).
3727                                  */
3728                                 spin_lock_irqsave(&ppd->lflags_lock, flags);
3729                                 ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
3730                                 spin_unlock_irqrestore(&ppd->lflags_lock,
3731                                                        flags);
3732                                 ppd->cpspec->ibcddrctrl |=
3733                                         IBA7220_IBC_IBTA_1_2_MASK;
3734                                 qib_write_kreg(dd, kr_ncmodectrl, 0);
3735                                 symadj = 1;
3736                         }
3737                 }
3738
3739                 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
3740                         symadj = 1;
3741
3742                 if (!ret) {
3743                         ppd->delay_mult = rate_to_delay
3744                             [(ibcs >> IBA7220_LINKSPEED_SHIFT) & 1]
3745                             [(ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1];
3746
3747                         set_7220_relock_poll(dd, ibup);
3748                         spin_lock_irqsave(&ppd->sdma_lock, flags);
3749                         /*
3750                          * Unlike 7322, the 7220 needs this, due to lack of
3751                          * interrupt in some cases when we have sdma active
3752                          * when the link goes down.
3753                          */
3754                         if (ppd->sdma_state.current_state !=
3755                             qib_sdma_state_s20_idle)
3756                                 __qib_sdma_process_event(ppd,
3757                                         qib_sdma_event_e00_go_hw_down);
3758                         spin_unlock_irqrestore(&ppd->sdma_lock, flags);
3759                 }
3760         }
3761
3762         if (symadj) {
3763                 if (ppd->cpspec->ibdeltainprog) {
3764                         ppd->cpspec->ibdeltainprog = 0;
3765                         ppd->cpspec->ibsymdelta += read_7220_creg32(ppd->dd,
3766                                 cr_ibsymbolerr) - ppd->cpspec->ibsymsnap;
3767                         ppd->cpspec->iblnkerrdelta += read_7220_creg32(ppd->dd,
3768                                 cr_iblinkerrrecov) - ppd->cpspec->iblnkerrsnap;
3769                 }
3770         } else if (!ibup && qib_compat_ddr_negotiate &&
3771                    !ppd->cpspec->ibdeltainprog &&
3772                         !(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
3773                 ppd->cpspec->ibdeltainprog = 1;
3774                 ppd->cpspec->ibsymsnap = read_7220_creg32(ppd->dd,
3775                                                           cr_ibsymbolerr);
3776                 ppd->cpspec->iblnkerrsnap = read_7220_creg32(ppd->dd,
3777                                                      cr_iblinkerrrecov);
3778         }
3779
3780         if (!ret)
3781                 qib_setup_7220_setextled(ppd, ibup);
3782         return ret;
3783 }
3784
3785 /*
3786  * Does read/modify/write to appropriate registers to
3787  * set output and direction bits selected by mask.
3788  * these are in their canonical postions (e.g. lsb of
3789  * dir will end up in D48 of extctrl on existing chips).
3790  * returns contents of GP Inputs.
3791  */
3792 static int gpio_7220_mod(struct qib_devdata *dd, u32 out, u32 dir, u32 mask)
3793 {
3794         u64 read_val, new_out;
3795         unsigned long flags;
3796
3797         if (mask) {
3798                 /* some bits being written, lock access to GPIO */
3799                 dir &= mask;
3800                 out &= mask;
3801                 spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
3802                 dd->cspec->extctrl &= ~((u64)mask << SYM_LSB(EXTCtrl, GPIOOe));
3803                 dd->cspec->extctrl |= ((u64) dir << SYM_LSB(EXTCtrl, GPIOOe));
3804                 new_out = (dd->cspec->gpio_out & ~mask) | out;
3805
3806                 qib_write_kreg(dd, kr_extctrl, dd->cspec->extctrl);
3807                 qib_write_kreg(dd, kr_gpio_out, new_out);
3808                 dd->cspec->gpio_out = new_out;
3809                 spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
3810         }
3811         /*
3812          * It is unlikely that a read at this time would get valid
3813          * data on a pin whose direction line was set in the same
3814          * call to this function. We include the read here because
3815          * that allows us to potentially combine a change on one pin with
3816          * a read on another, and because the old code did something like
3817          * this.
3818          */
3819         read_val = qib_read_kreg64(dd, kr_extstatus);
3820         return SYM_FIELD(read_val, EXTStatus, GPIOIn);
3821 }
3822
3823 /*
3824  * Read fundamental info we need to use the chip.  These are
3825  * the registers that describe chip capabilities, and are
3826  * saved in shadow registers.
3827  */
3828 static void get_7220_chip_params(struct qib_devdata *dd)
3829 {
3830         u64 val;
3831         u32 piobufs;
3832         int mtu;
3833
3834         dd->uregbase = qib_read_kreg32(dd, kr_userregbase);
3835
3836         dd->rcvtidcnt = qib_read_kreg32(dd, kr_rcvtidcnt);
3837         dd->rcvtidbase = qib_read_kreg32(dd, kr_rcvtidbase);
3838         dd->rcvegrbase = qib_read_kreg32(dd, kr_rcvegrbase);
3839         dd->palign = qib_read_kreg32(dd, kr_palign);
3840         dd->piobufbase = qib_read_kreg64(dd, kr_sendpiobufbase);
3841         dd->pio2k_bufbase = dd->piobufbase & 0xffffffff;
3842
3843         val = qib_read_kreg64(dd, kr_sendpiosize);
3844         dd->piosize2k = val & ~0U;
3845         dd->piosize4k = val >> 32;
3846
3847         mtu = ib_mtu_enum_to_int(qib_ibmtu);
3848         if (mtu == -1)
3849                 mtu = QIB_DEFAULT_MTU;
3850         dd->pport->ibmtu = (u32)mtu;
3851
3852         val = qib_read_kreg64(dd, kr_sendpiobufcnt);
3853         dd->piobcnt2k = val & ~0U;
3854         dd->piobcnt4k = val >> 32;
3855         /* these may be adjusted in init_chip_wc_pat() */
3856         dd->pio2kbase = (u32 __iomem *)
3857                 ((char __iomem *) dd->kregbase + dd->pio2k_bufbase);
3858         if (dd->piobcnt4k) {
3859                 dd->pio4kbase = (u32 __iomem *)
3860                         ((char __iomem *) dd->kregbase +
3861                          (dd->piobufbase >> 32));
3862                 /*
3863                  * 4K buffers take 2 pages; we use roundup just to be
3864                  * paranoid; we calculate it once here, rather than on
3865                  * ever buf allocate
3866                  */
3867                 dd->align4k = ALIGN(dd->piosize4k, dd->palign);
3868         }
3869
3870         piobufs = dd->piobcnt4k + dd->piobcnt2k;
3871
3872         dd->pioavregs = ALIGN(piobufs, sizeof(u64) * BITS_PER_BYTE / 2) /
3873                 (sizeof(u64) * BITS_PER_BYTE / 2);
3874 }
3875
3876 /*
3877  * The chip base addresses in cspec and cpspec have to be set
3878  * after possible init_chip_wc_pat(), rather than in
3879  * qib_get_7220_chip_params(), so split out as separate function
3880  */
3881 static void set_7220_baseaddrs(struct qib_devdata *dd)
3882 {
3883         u32 cregbase;
3884         /* init after possible re-map in init_chip_wc_pat() */
3885         cregbase = qib_read_kreg32(dd, kr_counterregbase);
3886         dd->cspec->cregbase = (u64 __iomem *)
3887                 ((char __iomem *) dd->kregbase + cregbase);
3888
3889         dd->egrtidbase = (u64 __iomem *)
3890                 ((char __iomem *) dd->kregbase + dd->rcvegrbase);
3891 }
3892
3893
3894 #define SENDCTRL_SHADOWED (SYM_MASK(SendCtrl, SendIntBufAvail) |        \
3895                            SYM_MASK(SendCtrl, SPioEnable) |             \
3896                            SYM_MASK(SendCtrl, SSpecialTriggerEn) |      \
3897                            SYM_MASK(SendCtrl, SendBufAvailUpd) |        \
3898                            SYM_MASK(SendCtrl, AvailUpdThld) |           \
3899                            SYM_MASK(SendCtrl, SDmaEnable) |             \
3900                            SYM_MASK(SendCtrl, SDmaIntEnable) |          \
3901                            SYM_MASK(SendCtrl, SDmaHalt) |               \
3902                            SYM_MASK(SendCtrl, SDmaSingleDescriptor))
3903
3904 static int sendctrl_hook(struct qib_devdata *dd,
3905                          const struct diag_observer *op,
3906                          u32 offs, u64 *data, u64 mask, int only_32)
3907 {
3908         unsigned long flags;
3909         unsigned idx = offs / sizeof(u64);
3910         u64 local_data, all_bits;
3911
3912         if (idx != kr_sendctrl) {
3913                 qib_dev_err(dd, "SendCtrl Hook called with offs %X, %s-bit\n",
3914                             offs, only_32 ? "32" : "64");
3915                 return 0;
3916         }
3917
3918         all_bits = ~0ULL;
3919         if (only_32)
3920                 all_bits >>= 32;
3921         spin_lock_irqsave(&dd->sendctrl_lock, flags);
3922         if ((mask & all_bits) != all_bits) {
3923                 /*
3924                  * At least some mask bits are zero, so we need
3925                  * to read. The judgement call is whether from
3926                  * reg or shadow. First-cut: read reg, and complain
3927                  * if any bits which should be shadowed are different
3928                  * from their shadowed value.
3929                  */
3930                 if (only_32)
3931                         local_data = (u64)qib_read_kreg32(dd, idx);
3932                 else
3933                         local_data = qib_read_kreg64(dd, idx);
3934                 qib_dev_err(dd, "Sendctrl -> %X, Shad -> %X\n",
3935                             (u32)local_data, (u32)dd->sendctrl);
3936                 if ((local_data & SENDCTRL_SHADOWED) !=
3937                     (dd->sendctrl & SENDCTRL_SHADOWED))
3938                         qib_dev_err(dd, "Sendctrl read: %X shadow is %X\n",
3939                                 (u32)local_data, (u32) dd->sendctrl);
3940                 *data = (local_data & ~mask) | (*data & mask);
3941         }
3942         if (mask) {
3943                 /*
3944                  * At least some mask bits are one, so we need
3945                  * to write, but only shadow some bits.
3946                  */
3947                 u64 sval, tval; /* Shadowed, transient */
3948
3949                 /*
3950                  * New shadow val is bits we don't want to touch,
3951                  * ORed with bits we do, that are intended for shadow.
3952                  */
3953                 sval = (dd->sendctrl & ~mask);
3954                 sval |= *data & SENDCTRL_SHADOWED & mask;
3955                 dd->sendctrl = sval;
3956                 tval = sval | (*data & ~SENDCTRL_SHADOWED & mask);
3957                 qib_dev_err(dd, "Sendctrl <- %X, Shad <- %X\n",
3958                             (u32)tval, (u32)sval);
3959                 qib_write_kreg(dd, kr_sendctrl, tval);
3960                 qib_write_kreg(dd, kr_scratch, 0Ull);
3961         }
3962         spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
3963
3964         return only_32 ? 4 : 8;
3965 }
3966
3967 static const struct diag_observer sendctrl_observer = {
3968         sendctrl_hook, kr_sendctrl * sizeof(u64),
3969         kr_sendctrl * sizeof(u64)
3970 };
3971
3972 /*
3973  * write the final few registers that depend on some of the
3974  * init setup.  Done late in init, just before bringing up
3975  * the serdes.
3976  */
3977 static int qib_late_7220_initreg(struct qib_devdata *dd)
3978 {
3979         int ret = 0;
3980         u64 val;
3981
3982         qib_write_kreg(dd, kr_rcvhdrentsize, dd->rcvhdrentsize);
3983         qib_write_kreg(dd, kr_rcvhdrsize, dd->rcvhdrsize);
3984         qib_write_kreg(dd, kr_rcvhdrcnt, dd->rcvhdrcnt);
3985         qib_write_kreg(dd, kr_sendpioavailaddr, dd->pioavailregs_phys);
3986         val = qib_read_kreg64(dd, kr_sendpioavailaddr);
3987         if (val != dd->pioavailregs_phys) {
3988                 qib_dev_err(dd,
3989                         "Catastrophic software error, SendPIOAvailAddr written as %lx, read back as %llx\n",
3990                         (unsigned long) dd->pioavailregs_phys,
3991                         (unsigned long long) val);
3992                 ret = -EINVAL;
3993         }
3994         qib_register_observer(dd, &sendctrl_observer);
3995         return ret;
3996 }
3997
3998 static int qib_init_7220_variables(struct qib_devdata *dd)
3999 {
4000         struct qib_chippport_specific *cpspec;
4001         struct qib_pportdata *ppd;
4002         int ret = 0;
4003         u32 sbufs, updthresh;
4004
4005         cpspec = (struct qib_chippport_specific *)(dd + 1);
4006         ppd = &cpspec->pportdata;
4007         dd->pport = ppd;
4008         dd->num_pports = 1;
4009
4010         dd->cspec = (struct qib_chip_specific *)(cpspec + dd->num_pports);
4011         ppd->cpspec = cpspec;
4012
4013         spin_lock_init(&dd->cspec->sdepb_lock);
4014         spin_lock_init(&dd->cspec->rcvmod_lock);
4015         spin_lock_init(&dd->cspec->gpio_lock);
4016
4017         /* we haven't yet set QIB_PRESENT, so use read directly */
4018         dd->revision = readq(&dd->kregbase[kr_revision]);
4019
4020         if ((dd->revision & 0xffffffffU) == 0xffffffffU) {
4021                 qib_dev_err(dd,
4022                         "Revision register read failure, giving up initialization\n");
4023                 ret = -ENODEV;
4024                 goto bail;
4025         }
4026         dd->flags |= QIB_PRESENT;  /* now register routines work */
4027
4028         dd->majrev = (u8) SYM_FIELD(dd->revision, Revision_R,
4029                                     ChipRevMajor);
4030         dd->minrev = (u8) SYM_FIELD(dd->revision, Revision_R,
4031                                     ChipRevMinor);
4032
4033         get_7220_chip_params(dd);
4034         qib_7220_boardname(dd);
4035
4036         /*
4037          * GPIO bits for TWSI data and clock,
4038          * used for serial EEPROM.
4039          */
4040         dd->gpio_sda_num = _QIB_GPIO_SDA_NUM;
4041         dd->gpio_scl_num = _QIB_GPIO_SCL_NUM;
4042         dd->twsi_eeprom_dev = QIB_TWSI_EEPROM_DEV;
4043
4044         dd->flags |= QIB_HAS_INTX | QIB_HAS_LINK_LATENCY |
4045                 QIB_NODMA_RTAIL | QIB_HAS_THRESH_UPDATE;
4046         dd->flags |= qib_special_trigger ?
4047                 QIB_USE_SPCL_TRIG : QIB_HAS_SEND_DMA;
4048
4049         /*
4050          * EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
4051          * 2 is Some Misc, 3 is reserved for future.
4052          */
4053         dd->eep_st_masks[0].hwerrs_to_log = HWE_MASK(TXEMemParityErr);
4054
4055         dd->eep_st_masks[1].hwerrs_to_log = HWE_MASK(RXEMemParityErr);
4056
4057         dd->eep_st_masks[2].errs_to_log = ERR_MASK(ResetNegated);
4058
4059         init_waitqueue_head(&cpspec->autoneg_wait);
4060         INIT_DELAYED_WORK(&cpspec->autoneg_work, autoneg_7220_work);
4061
4062         ret = qib_init_pportdata(ppd, dd, 0, 1);
4063         if (ret)
4064                 goto bail;
4065         ppd->link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
4066         ppd->link_speed_supported = QIB_IB_SDR | QIB_IB_DDR;
4067
4068         ppd->link_width_enabled = ppd->link_width_supported;
4069         ppd->link_speed_enabled = ppd->link_speed_supported;
4070         /*
4071          * Set the initial values to reasonable default, will be set
4072          * for real when link is up.
4073          */
4074         ppd->link_width_active = IB_WIDTH_4X;
4075         ppd->link_speed_active = QIB_IB_SDR;
4076         ppd->delay_mult = rate_to_delay[0][1];
4077         ppd->vls_supported = IB_VL_VL0;
4078         ppd->vls_operational = ppd->vls_supported;
4079
4080         if (!qib_mini_init)
4081                 qib_write_kreg(dd, kr_rcvbthqp, QIB_KD_QP);
4082
4083         init_timer(&ppd->cpspec->chase_timer);
4084         ppd->cpspec->chase_timer.function = reenable_7220_chase;
4085         ppd->cpspec->chase_timer.data = (unsigned long)ppd;
4086
4087         qib_num_cfg_vls = 1; /* if any 7220's, only one VL */
4088
4089         dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE;
4090         dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE;
4091         dd->rhf_offset =
4092                 dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);
4093
4094         /* we always allocate at least 2048 bytes for eager buffers */
4095         ret = ib_mtu_enum_to_int(qib_ibmtu);
4096         dd->rcvegrbufsize = ret != -1 ? max(ret, 2048) : QIB_DEFAULT_MTU;
4097         BUG_ON(!is_power_of_2(dd->rcvegrbufsize));
4098         dd->rcvegrbufsize_shift = ilog2(dd->rcvegrbufsize);
4099
4100         qib_7220_tidtemplate(dd);
4101
4102         /*
4103          * We can request a receive interrupt for 1 or
4104          * more packets from current offset.  For now, we set this
4105          * up for a single packet.
4106          */
4107         dd->rhdrhead_intr_off = 1ULL << 32;
4108
4109         /* setup the stats timer; the add_timer is done at end of init */
4110         init_timer(&dd->stats_timer);
4111         dd->stats_timer.function = qib_get_7220_faststats;
4112         dd->stats_timer.data = (unsigned long) dd;
4113         dd->stats_timer.expires = jiffies + ACTIVITY_TIMER * HZ;
4114
4115         /*
4116          * Control[4] has been added to change the arbitration within
4117          * the SDMA engine between favoring data fetches over descriptor
4118          * fetches.  qib_sdma_fetch_arb==0 gives data fetches priority.
4119          */
4120         if (qib_sdma_fetch_arb)
4121                 dd->control |= 1 << 4;
4122
4123         dd->ureg_align = 0x10000;  /* 64KB alignment */
4124
4125         dd->piosize2kmax_dwords = (dd->piosize2k >> 2)-1;
4126         qib_7220_config_ctxts(dd);
4127         qib_set_ctxtcnt(dd);  /* needed for PAT setup */
4128
4129         ret = init_chip_wc_pat(dd, 0);
4130         if (ret)
4131                 goto bail;
4132         set_7220_baseaddrs(dd); /* set chip access pointers now */
4133
4134         ret = 0;
4135         if (qib_mini_init)
4136                 goto bail;
4137
4138         ret = qib_create_ctxts(dd);
4139         init_7220_cntrnames(dd);
4140
4141         /* use all of 4KB buffers for the kernel SDMA, zero if !SDMA.
4142          * reserve the update threshold amount for other kernel use, such
4143          * as sending SMI, MAD, and ACKs, or 3, whichever is greater,
4144          * unless we aren't enabling SDMA, in which case we want to use
4145          * all the 4k bufs for the kernel.
4146          * if this was less than the update threshold, we could wait
4147          * a long time for an update.  Coded this way because we
4148          * sometimes change the update threshold for various reasons,
4149          * and we want this to remain robust.
4150          */
4151         updthresh = 8U; /* update threshold */
4152         if (dd->flags & QIB_HAS_SEND_DMA) {
4153                 dd->cspec->sdmabufcnt =  dd->piobcnt4k;
4154                 sbufs = updthresh > 3 ? updthresh : 3;
4155         } else {
4156                 dd->cspec->sdmabufcnt = 0;
4157                 sbufs = dd->piobcnt4k;
4158         }
4159
4160         dd->cspec->lastbuf_for_pio = dd->piobcnt2k + dd->piobcnt4k -
4161                 dd->cspec->sdmabufcnt;
4162         dd->lastctxt_piobuf = dd->cspec->lastbuf_for_pio - sbufs;
4163         dd->cspec->lastbuf_for_pio--; /* range is <= , not < */
4164         dd->last_pio = dd->cspec->lastbuf_for_pio;
4165         dd->pbufsctxt = dd->lastctxt_piobuf /
4166                 (dd->cfgctxts - dd->first_user_ctxt);
4167
4168         /*
4169          * if we are at 16 user contexts, we will have one 7 sbufs
4170          * per context, so drop the update threshold to match.  We
4171          * want to update before we actually run out, at low pbufs/ctxt
4172          * so give ourselves some margin
4173          */
4174         if ((dd->pbufsctxt - 2) < updthresh)
4175                 updthresh = dd->pbufsctxt - 2;
4176
4177         dd->cspec->updthresh_dflt = updthresh;
4178         dd->cspec->updthresh = updthresh;
4179
4180         /* before full enable, no interrupts, no locking needed */
4181         dd->sendctrl |= (updthresh & SYM_RMASK(SendCtrl, AvailUpdThld))
4182                              << SYM_LSB(SendCtrl, AvailUpdThld);
4183
4184         dd->psxmitwait_supported = 1;
4185         dd->psxmitwait_check_rate = QIB_7220_PSXMITWAIT_CHECK_RATE;
4186 bail:
4187         return ret;
4188 }
4189
4190 static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *ppd, u64 pbc,
4191                                         u32 *pbufnum)
4192 {
4193         u32 first, last, plen = pbc & QIB_PBC_LENGTH_MASK;
4194         struct qib_devdata *dd = ppd->dd;
4195         u32 __iomem *buf;
4196
4197         if (((pbc >> 32) & PBC_7220_VL15_SEND_CTRL) &&
4198                 !(ppd->lflags & (QIBL_IB_AUTONEG_INPROG | QIBL_LINKACTIVE)))
4199                 buf = get_7220_link_buf(ppd, pbufnum);
4200         else {
4201                 if ((plen + 1) > dd->piosize2kmax_dwords)
4202                         first = dd->piobcnt2k;
4203                 else
4204                         first = 0;
4205                 /* try 4k if all 2k busy, so same last for both sizes */
4206                 last = dd->cspec->lastbuf_for_pio;
4207                 buf = qib_getsendbuf_range(dd, pbufnum, first, last);
4208         }
4209         return buf;
4210 }
4211
4212 /* these 2 "counters" are really control registers, and are always RW */
4213 static void qib_set_cntr_7220_sample(struct qib_pportdata *ppd, u32 intv,
4214                                      u32 start)
4215 {
4216         write_7220_creg(ppd->dd, cr_psinterval, intv);
4217         write_7220_creg(ppd->dd, cr_psstart, start);
4218 }
4219
4220 /*
4221  * NOTE: no real attempt is made to generalize the SDMA stuff.
4222  * At some point "soon" we will have a new more generalized
4223  * set of sdma interface, and then we'll clean this up.
4224  */
4225
4226 /* Must be called with sdma_lock held, or before init finished */
4227 static void qib_sdma_update_7220_tail(struct qib_pportdata *ppd, u16 tail)
4228 {
4229         /* Commit writes to memory and advance the tail on the chip */
4230         wmb();
4231         ppd->sdma_descq_tail = tail;
4232         qib_write_kreg(ppd->dd, kr_senddmatail, tail);
4233 }
4234
4235 static void qib_sdma_set_7220_desc_cnt(struct qib_pportdata *ppd, unsigned cnt)
4236 {
4237 }
4238
4239 static struct sdma_set_state_action sdma_7220_action_table[] = {
4240         [qib_sdma_state_s00_hw_down] = {
4241                 .op_enable = 0,
4242                 .op_intenable = 0,
4243                 .op_halt = 0,
4244                 .go_s99_running_tofalse = 1,
4245         },
4246         [qib_sdma_state_s10_hw_start_up_wait] = {
4247                 .op_enable = 1,
4248                 .op_intenable = 1,
4249                 .op_halt = 1,
4250         },
4251         [qib_sdma_state_s20_idle] = {
4252                 .op_enable = 1,
4253                 .op_intenable = 1,
4254                 .op_halt = 1,
4255         },
4256         [qib_sdma_state_s30_sw_clean_up_wait] = {
4257                 .op_enable = 0,
4258                 .op_intenable = 1,
4259                 .op_halt = 0,
4260         },
4261         [qib_sdma_state_s40_hw_clean_up_wait] = {
4262                 .op_enable = 1,
4263                 .op_intenable = 1,
4264                 .op_halt = 1,
4265         },
4266         [qib_sdma_state_s50_hw_halt_wait] = {
4267                 .op_enable = 1,
4268                 .op_intenable = 1,
4269                 .op_halt = 1,
4270         },
4271         [qib_sdma_state_s99_running] = {
4272                 .op_enable = 1,
4273                 .op_intenable = 1,
4274                 .op_halt = 0,
4275                 .go_s99_running_totrue = 1,
4276         },
4277 };
4278
4279 static void qib_7220_sdma_init_early(struct qib_pportdata *ppd)
4280 {
4281         ppd->sdma_state.set_state_action = sdma_7220_action_table;
4282 }
4283
4284 static int init_sdma_7220_regs(struct qib_pportdata *ppd)
4285 {
4286         struct qib_devdata *dd = ppd->dd;
4287         unsigned i, n;
4288         u64 senddmabufmask[3] = { 0 };
4289
4290         /* Set SendDmaBase */
4291         qib_write_kreg(dd, kr_senddmabase, ppd->sdma_descq_phys);
4292         qib_sdma_7220_setlengen(ppd);
4293         qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
4294         /* Set SendDmaHeadAddr */
4295         qib_write_kreg(dd, kr_senddmaheadaddr, ppd->sdma_head_phys);
4296
4297         /*
4298          * Reserve all the former "kernel" piobufs, using high number range
4299          * so we get as many 4K buffers as possible
4300          */
4301         n = dd->piobcnt2k + dd->piobcnt4k;
4302         i = n - dd->cspec->sdmabufcnt;
4303
4304         for (; i < n; ++i) {
4305                 unsigned word = i / 64;
4306                 unsigned bit = i & 63;
4307
4308                 BUG_ON(word >= 3);
4309                 senddmabufmask[word] |= 1ULL << bit;
4310         }
4311         qib_write_kreg(dd, kr_senddmabufmask0, senddmabufmask[0]);
4312         qib_write_kreg(dd, kr_senddmabufmask1, senddmabufmask[1]);
4313         qib_write_kreg(dd, kr_senddmabufmask2, senddmabufmask[2]);
4314
4315         ppd->sdma_state.first_sendbuf = i;
4316         ppd->sdma_state.last_sendbuf = n;
4317
4318         return 0;
4319 }
4320
4321 /* sdma_lock must be held */
4322 static u16 qib_sdma_7220_gethead(struct qib_pportdata *ppd)
4323 {
4324         struct qib_devdata *dd = ppd->dd;
4325         int sane;
4326         int use_dmahead;
4327         u16 swhead;
4328         u16 swtail;
4329         u16 cnt;
4330         u16 hwhead;
4331
4332         use_dmahead = __qib_sdma_running(ppd) &&
4333                 (dd->flags & QIB_HAS_SDMA_TIMEOUT);
4334 retry:
4335         hwhead = use_dmahead ?
4336                 (u16)le64_to_cpu(*ppd->sdma_head_dma) :
4337                 (u16)qib_read_kreg32(dd, kr_senddmahead);
4338
4339         swhead = ppd->sdma_descq_head;
4340         swtail = ppd->sdma_descq_tail;
4341         cnt = ppd->sdma_descq_cnt;
4342
4343         if (swhead < swtail) {
4344                 /* not wrapped */
4345                 sane = (hwhead >= swhead) & (hwhead <= swtail);
4346         } else if (swhead > swtail) {
4347                 /* wrapped around */
4348                 sane = ((hwhead >= swhead) && (hwhead < cnt)) ||
4349                         (hwhead <= swtail);
4350         } else {
4351                 /* empty */
4352                 sane = (hwhead == swhead);
4353         }
4354
4355         if (unlikely(!sane)) {
4356                 if (use_dmahead) {
4357                         /* try one more time, directly from the register */
4358                         use_dmahead = 0;
4359                         goto retry;
4360                 }
4361                 /* assume no progress */
4362                 hwhead = swhead;
4363         }
4364
4365         return hwhead;
4366 }
4367
4368 static int qib_sdma_7220_busy(struct qib_pportdata *ppd)
4369 {
4370         u64 hwstatus = qib_read_kreg64(ppd->dd, kr_senddmastatus);
4371
4372         return (hwstatus & SYM_MASK(SendDmaStatus, ScoreBoardDrainInProg)) ||
4373                (hwstatus & SYM_MASK(SendDmaStatus, AbortInProg)) ||
4374                (hwstatus & SYM_MASK(SendDmaStatus, InternalSDmaEnable)) ||
4375                !(hwstatus & SYM_MASK(SendDmaStatus, ScbEmpty));
4376 }
4377
4378 /*
4379  * Compute the amount of delay before sending the next packet if the
4380  * port's send rate differs from the static rate set for the QP.
4381  * Since the delay affects this packet but the amount of the delay is
4382  * based on the length of the previous packet, use the last delay computed
4383  * and save the delay count for this packet to be used next time
4384  * we get here.
4385  */
4386 static u32 qib_7220_setpbc_control(struct qib_pportdata *ppd, u32 plen,
4387                                    u8 srate, u8 vl)
4388 {
4389         u8 snd_mult = ppd->delay_mult;
4390         u8 rcv_mult = ib_rate_to_delay[srate];
4391         u32 ret = ppd->cpspec->last_delay_mult;
4392
4393         ppd->cpspec->last_delay_mult = (rcv_mult > snd_mult) ?
4394                 (plen * (rcv_mult - snd_mult) + 1) >> 1 : 0;
4395
4396         /* Indicate VL15, if necessary */
4397         if (vl == 15)
4398                 ret |= PBC_7220_VL15_SEND_CTRL;
4399         return ret;
4400 }
4401
4402 static void qib_7220_initvl15_bufs(struct qib_devdata *dd)
4403 {
4404 }
4405
4406 static void qib_7220_init_ctxt(struct qib_ctxtdata *rcd)
4407 {
4408         if (!rcd->ctxt) {
4409                 rcd->rcvegrcnt = IBA7220_KRCVEGRCNT;
4410                 rcd->rcvegr_tid_base = 0;
4411         } else {
4412                 rcd->rcvegrcnt = rcd->dd->cspec->rcvegrcnt;
4413                 rcd->rcvegr_tid_base = IBA7220_KRCVEGRCNT +
4414                         (rcd->ctxt - 1) * rcd->rcvegrcnt;
4415         }
4416 }
4417
4418 static void qib_7220_txchk_change(struct qib_devdata *dd, u32 start,
4419                                   u32 len, u32 which, struct qib_ctxtdata *rcd)
4420 {
4421         int i;
4422         unsigned long flags;
4423
4424         switch (which) {
4425         case TXCHK_CHG_TYPE_KERN:
4426                 /* see if we need to raise avail update threshold */
4427                 spin_lock_irqsave(&dd->uctxt_lock, flags);
4428                 for (i = dd->first_user_ctxt;
4429                      dd->cspec->updthresh != dd->cspec->updthresh_dflt
4430                      && i < dd->cfgctxts; i++)
4431                         if (dd->rcd[i] && dd->rcd[i]->subctxt_cnt &&
4432                            ((dd->rcd[i]->piocnt / dd->rcd[i]->subctxt_cnt) - 1)
4433                            < dd->cspec->updthresh_dflt)
4434                                 break;
4435                 spin_unlock_irqrestore(&dd->uctxt_lock, flags);
4436                 if (i == dd->cfgctxts) {
4437                         spin_lock_irqsave(&dd->sendctrl_lock, flags);
4438                         dd->cspec->updthresh = dd->cspec->updthresh_dflt;
4439                         dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
4440                         dd->sendctrl |= (dd->cspec->updthresh &
4441                                          SYM_RMASK(SendCtrl, AvailUpdThld)) <<
4442                                            SYM_LSB(SendCtrl, AvailUpdThld);
4443                         spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4444                         sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
4445                 }
4446                 break;
4447         case TXCHK_CHG_TYPE_USER:
4448                 spin_lock_irqsave(&dd->sendctrl_lock, flags);
4449                 if (rcd && rcd->subctxt_cnt && ((rcd->piocnt
4450                         / rcd->subctxt_cnt) - 1) < dd->cspec->updthresh) {
4451                         dd->cspec->updthresh = (rcd->piocnt /
4452                                                 rcd->subctxt_cnt) - 1;
4453                         dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
4454                         dd->sendctrl |= (dd->cspec->updthresh &
4455                                         SYM_RMASK(SendCtrl, AvailUpdThld))
4456                                         << SYM_LSB(SendCtrl, AvailUpdThld);
4457                         spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4458                         sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
4459                 } else
4460                         spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
4461                 break;
4462         }
4463 }
4464
4465 static void writescratch(struct qib_devdata *dd, u32 val)
4466 {
4467         qib_write_kreg(dd, kr_scratch, val);
4468 }
4469
4470 #define VALID_TS_RD_REG_MASK 0xBF
4471 /**
4472  * qib_7220_tempsense_read - read register of temp sensor via TWSI
4473  * @dd: the qlogic_ib device
4474  * @regnum: register to read from
4475  *
4476  * returns reg contents (0..255) or < 0 for error
4477  */
4478 static int qib_7220_tempsense_rd(struct qib_devdata *dd, int regnum)
4479 {
4480         int ret;
4481         u8 rdata;
4482
4483         if (regnum > 7) {
4484                 ret = -EINVAL;
4485                 goto bail;
4486         }
4487
4488         /* return a bogus value for (the one) register we do not have */
4489         if (!((1 << regnum) & VALID_TS_RD_REG_MASK)) {
4490                 ret = 0;
4491                 goto bail;
4492         }
4493
4494         ret = mutex_lock_interruptible(&dd->eep_lock);
4495         if (ret)
4496                 goto bail;
4497
4498         ret = qib_twsi_blk_rd(dd, QIB_TWSI_TEMP_DEV, regnum, &rdata, 1);
4499         if (!ret)
4500                 ret = rdata;
4501
4502         mutex_unlock(&dd->eep_lock);
4503
4504         /*
4505          * There are three possibilities here:
4506          * ret is actual value (0..255)
4507          * ret is -ENXIO or -EINVAL from twsi code or this file
4508          * ret is -EINTR from mutex_lock_interruptible.
4509          */
4510 bail:
4511         return ret;
4512 }
4513
4514 #ifdef CONFIG_INFINIBAND_QIB_DCA
4515 static int qib_7220_notify_dca(struct qib_devdata *dd, unsigned long event)
4516 {
4517         return 0;
4518 }
4519 #endif
4520
4521 /* Dummy function, as 7220 boards never disable EEPROM Write */
4522 static int qib_7220_eeprom_wen(struct qib_devdata *dd, int wen)
4523 {
4524         return 1;
4525 }
4526
4527 /**
4528  * qib_init_iba7220_funcs - set up the chip-specific function pointers
4529  * @dev: the pci_dev for qlogic_ib device
4530  * @ent: pci_device_id struct for this dev
4531  *
4532  * This is global, and is called directly at init to set up the
4533  * chip-specific function pointers for later use.
4534  */
4535 struct qib_devdata *qib_init_iba7220_funcs(struct pci_dev *pdev,
4536                                            const struct pci_device_id *ent)
4537 {
4538         struct qib_devdata *dd;
4539         int ret;
4540         u32 boardid, minwidth;
4541
4542         dd = qib_alloc_devdata(pdev, sizeof(struct qib_chip_specific) +
4543                 sizeof(struct qib_chippport_specific));
4544         if (IS_ERR(dd))
4545                 goto bail;
4546
4547         dd->f_bringup_serdes    = qib_7220_bringup_serdes;
4548         dd->f_cleanup           = qib_setup_7220_cleanup;
4549         dd->f_clear_tids        = qib_7220_clear_tids;
4550         dd->f_free_irq          = qib_7220_free_irq;
4551         dd->f_get_base_info     = qib_7220_get_base_info;
4552         dd->f_get_msgheader     = qib_7220_get_msgheader;
4553         dd->f_getsendbuf        = qib_7220_getsendbuf;
4554         dd->f_gpio_mod          = gpio_7220_mod;
4555         dd->f_eeprom_wen        = qib_7220_eeprom_wen;
4556         dd->f_hdrqempty         = qib_7220_hdrqempty;
4557         dd->f_ib_updown         = qib_7220_ib_updown;
4558         dd->f_init_ctxt         = qib_7220_init_ctxt;
4559         dd->f_initvl15_bufs     = qib_7220_initvl15_bufs;
4560         dd->f_intr_fallback     = qib_7220_intr_fallback;
4561         dd->f_late_initreg      = qib_late_7220_initreg;
4562         dd->f_setpbc_control    = qib_7220_setpbc_control;
4563         dd->f_portcntr          = qib_portcntr_7220;
4564         dd->f_put_tid           = qib_7220_put_tid;
4565         dd->f_quiet_serdes      = qib_7220_quiet_serdes;
4566         dd->f_rcvctrl           = rcvctrl_7220_mod;
4567         dd->f_read_cntrs        = qib_read_7220cntrs;
4568         dd->f_read_portcntrs    = qib_read_7220portcntrs;
4569         dd->f_reset             = qib_setup_7220_reset;
4570         dd->f_init_sdma_regs    = init_sdma_7220_regs;
4571         dd->f_sdma_busy         = qib_sdma_7220_busy;
4572         dd->f_sdma_gethead      = qib_sdma_7220_gethead;
4573         dd->f_sdma_sendctrl     = qib_7220_sdma_sendctrl;
4574         dd->f_sdma_set_desc_cnt = qib_sdma_set_7220_desc_cnt;
4575         dd->f_sdma_update_tail  = qib_sdma_update_7220_tail;
4576         dd->f_sdma_hw_clean_up  = qib_7220_sdma_hw_clean_up;
4577         dd->f_sdma_hw_start_up  = qib_7220_sdma_hw_start_up;
4578         dd->f_sdma_init_early   = qib_7220_sdma_init_early;
4579         dd->f_sendctrl          = sendctrl_7220_mod;
4580         dd->f_set_armlaunch     = qib_set_7220_armlaunch;
4581         dd->f_set_cntr_sample   = qib_set_cntr_7220_sample;
4582         dd->f_iblink_state      = qib_7220_iblink_state;
4583         dd->f_ibphys_portstate  = qib_7220_phys_portstate;
4584         dd->f_get_ib_cfg        = qib_7220_get_ib_cfg;
4585         dd->f_set_ib_cfg        = qib_7220_set_ib_cfg;
4586         dd->f_set_ib_loopback   = qib_7220_set_loopback;
4587         dd->f_set_intr_state    = qib_7220_set_intr_state;
4588         dd->f_setextled         = qib_setup_7220_setextled;
4589         dd->f_txchk_change      = qib_7220_txchk_change;
4590         dd->f_update_usrhead    = qib_update_7220_usrhead;
4591         dd->f_wantpiobuf_intr   = qib_wantpiobuf_7220_intr;
4592         dd->f_xgxs_reset        = qib_7220_xgxs_reset;
4593         dd->f_writescratch      = writescratch;
4594         dd->f_tempsense_rd      = qib_7220_tempsense_rd;
4595 #ifdef CONFIG_INFINIBAND_QIB_DCA
4596         dd->f_notify_dca = qib_7220_notify_dca;
4597 #endif
4598         /*
4599          * Do remaining pcie setup and save pcie values in dd.
4600          * Any error printing is already done by the init code.
4601          * On return, we have the chip mapped, but chip registers
4602          * are not set up until start of qib_init_7220_variables.
4603          */
4604         ret = qib_pcie_ddinit(dd, pdev, ent);
4605         if (ret < 0)
4606                 goto bail_free;
4607
4608         /* initialize chip-specific variables */
4609         ret = qib_init_7220_variables(dd);
4610         if (ret)
4611                 goto bail_cleanup;
4612
4613         if (qib_mini_init)
4614                 goto bail;
4615
4616         boardid = SYM_FIELD(dd->revision, Revision,
4617                             BoardID);
4618         switch (boardid) {
4619         case 0:
4620         case 2:
4621         case 10:
4622         case 12:
4623                 minwidth = 16; /* x16 capable boards */
4624                 break;
4625         default:
4626                 minwidth = 8; /* x8 capable boards */
4627                 break;
4628         }
4629         if (qib_pcie_params(dd, minwidth, NULL, NULL))
4630                 qib_dev_err(dd,
4631                         "Failed to setup PCIe or interrupts; continuing anyway\n");
4632
4633         /* save IRQ for possible later use */
4634         dd->cspec->irq = pdev->irq;
4635
4636         if (qib_read_kreg64(dd, kr_hwerrstatus) &
4637             QLOGIC_IB_HWE_SERDESPLLFAILED)
4638                 qib_write_kreg(dd, kr_hwerrclear,
4639                                QLOGIC_IB_HWE_SERDESPLLFAILED);
4640
4641         /* setup interrupt handler (interrupt type handled above) */
4642         qib_setup_7220_interrupt(dd);
4643         qib_7220_init_hwerrors(dd);
4644
4645         /* clear diagctrl register, in case diags were running and crashed */
4646         qib_write_kreg(dd, kr_hwdiagctrl, 0);
4647
4648         goto bail;
4649
4650 bail_cleanup:
4651         qib_pcie_ddcleanup(dd);
4652 bail_free:
4653         qib_free_devdata(dd);
4654         dd = ERR_PTR(ret);
4655 bail:
4656         return dd;
4657 }