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gerrit-public.fairphone.software / kernel / msm-4.9 / 72c1a73993cfa3572e45e1a878ff7acf31d14fc8 / . / drivers / infiniband / hw / qib / qib_iba7220.c
blob: 22affda8af88eacbd11f21abab55ba299dfb0e0b [file] [log] [blame]
/*
* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
* All rights reserved.
* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* This file contains all of the code that is specific to the
* QLogic_IB 7220 chip (except that specific to the SerDes)
*/
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/io.h>
#include <rdma/ib_verbs.h>
#include "qib.h"
#include "qib_7220.h"
static void qib_setup_7220_setextled(struct qib_pportdata *, u32);
static void qib_7220_handle_hwerrors(struct qib_devdata *, char *, size_t);
static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op);
static u32 qib_7220_iblink_state(u64);
static u8 qib_7220_phys_portstate(u64);
static void qib_sdma_update_7220_tail(struct qib_pportdata *, u16);
static void qib_set_ib_7220_lstate(struct qib_pportdata *, u16, u16);
/*
* This file contains almost all the chip-specific register information and
* access functions for the QLogic QLogic_IB 7220 PCI-Express chip, with the
* exception of SerDes support, which in in qib_sd7220.c.
*/
/* Below uses machine-generated qib_chipnum_regs.h file */
#define KREG_IDX(regname) (QIB_7220_##regname##_OFFS / sizeof(u64))
/* Use defines to tie machine-generated names to lower-case names */
#define kr_control KREG_IDX(Control)
#define kr_counterregbase KREG_IDX(CntrRegBase)
#define kr_errclear KREG_IDX(ErrClear)
#define kr_errmask KREG_IDX(ErrMask)
#define kr_errstatus KREG_IDX(ErrStatus)
#define kr_extctrl KREG_IDX(EXTCtrl)
#define kr_extstatus KREG_IDX(EXTStatus)
#define kr_gpio_clear KREG_IDX(GPIOClear)
#define kr_gpio_mask KREG_IDX(GPIOMask)
#define kr_gpio_out KREG_IDX(GPIOOut)
#define kr_gpio_status KREG_IDX(GPIOStatus)
#define kr_hrtbt_guid KREG_IDX(HRTBT_GUID)
#define kr_hwdiagctrl KREG_IDX(HwDiagCtrl)
#define kr_hwerrclear KREG_IDX(HwErrClear)
#define kr_hwerrmask KREG_IDX(HwErrMask)
#define kr_hwerrstatus KREG_IDX(HwErrStatus)
#define kr_ibcctrl KREG_IDX(IBCCtrl)
#define kr_ibcddrctrl KREG_IDX(IBCDDRCtrl)
#define kr_ibcddrstatus KREG_IDX(IBCDDRStatus)
#define kr_ibcstatus KREG_IDX(IBCStatus)
#define kr_ibserdesctrl KREG_IDX(IBSerDesCtrl)
#define kr_intclear KREG_IDX(IntClear)
#define kr_intmask KREG_IDX(IntMask)
#define kr_intstatus KREG_IDX(IntStatus)
#define kr_ncmodectrl KREG_IDX(IBNCModeCtrl)
#define kr_palign KREG_IDX(PageAlign)
#define kr_partitionkey KREG_IDX(RcvPartitionKey)
#define kr_portcnt KREG_IDX(PortCnt)
#define kr_rcvbthqp KREG_IDX(RcvBTHQP)
#define kr_rcvctrl KREG_IDX(RcvCtrl)
#define kr_rcvegrbase KREG_IDX(RcvEgrBase)
#define kr_rcvegrcnt KREG_IDX(RcvEgrCnt)
#define kr_rcvhdrcnt KREG_IDX(RcvHdrCnt)
#define kr_rcvhdrentsize KREG_IDX(RcvHdrEntSize)
#define kr_rcvhdrsize KREG_IDX(RcvHdrSize)
#define kr_rcvpktledcnt KREG_IDX(RcvPktLEDCnt)
#define kr_rcvtidbase KREG_IDX(RcvTIDBase)
#define kr_rcvtidcnt KREG_IDX(RcvTIDCnt)
#define kr_revision KREG_IDX(Revision)
#define kr_scratch KREG_IDX(Scratch)
#define kr_sendbuffererror KREG_IDX(SendBufErr0)
#define kr_sendctrl KREG_IDX(SendCtrl)
#define kr_senddmabase KREG_IDX(SendDmaBase)
#define kr_senddmabufmask0 KREG_IDX(SendDmaBufMask0)
#define kr_senddmabufmask1 (KREG_IDX(SendDmaBufMask0) + 1)
#define kr_senddmabufmask2 (KREG_IDX(SendDmaBufMask0) + 2)
#define kr_senddmahead KREG_IDX(SendDmaHead)
#define kr_senddmaheadaddr KREG_IDX(SendDmaHeadAddr)
#define kr_senddmalengen KREG_IDX(SendDmaLenGen)
#define kr_senddmastatus KREG_IDX(SendDmaStatus)
#define kr_senddmatail KREG_IDX(SendDmaTail)
#define kr_sendpioavailaddr KREG_IDX(SendBufAvailAddr)
#define kr_sendpiobufbase KREG_IDX(SendBufBase)
#define kr_sendpiobufcnt KREG_IDX(SendBufCnt)
#define kr_sendpiosize KREG_IDX(SendBufSize)
#define kr_sendregbase KREG_IDX(SendRegBase)
#define kr_userregbase KREG_IDX(UserRegBase)
#define kr_xgxs_cfg KREG_IDX(XGXSCfg)
/* These must only be written via qib_write_kreg_ctxt() */
#define kr_rcvhdraddr KREG_IDX(RcvHdrAddr0)
#define kr_rcvhdrtailaddr KREG_IDX(RcvHdrTailAddr0)
#define CREG_IDX(regname) ((QIB_7220_##regname##_OFFS - \
QIB_7220_LBIntCnt_OFFS) / sizeof(u64))
#define cr_badformat CREG_IDX(RxVersionErrCnt)
#define cr_erricrc CREG_IDX(RxICRCErrCnt)
#define cr_errlink CREG_IDX(RxLinkMalformCnt)
#define cr_errlpcrc CREG_IDX(RxLPCRCErrCnt)
#define cr_errpkey CREG_IDX(RxPKeyMismatchCnt)
#define cr_rcvflowctrl_err CREG_IDX(RxFlowCtrlViolCnt)
#define cr_err_rlen CREG_IDX(RxLenErrCnt)
#define cr_errslen CREG_IDX(TxLenErrCnt)
#define cr_errtidfull CREG_IDX(RxTIDFullErrCnt)
#define cr_errtidvalid CREG_IDX(RxTIDValidErrCnt)
#define cr_errvcrc CREG_IDX(RxVCRCErrCnt)
#define cr_ibstatuschange CREG_IDX(IBStatusChangeCnt)
#define cr_lbint CREG_IDX(LBIntCnt)
#define cr_invalidrlen CREG_IDX(RxMaxMinLenErrCnt)
#define cr_invalidslen CREG_IDX(TxMaxMinLenErrCnt)
#define cr_lbflowstall CREG_IDX(LBFlowStallCnt)
#define cr_pktrcv CREG_IDX(RxDataPktCnt)
#define cr_pktrcvflowctrl CREG_IDX(RxFlowPktCnt)
#define cr_pktsend CREG_IDX(TxDataPktCnt)
#define cr_pktsendflow CREG_IDX(TxFlowPktCnt)
#define cr_portovfl CREG_IDX(RxP0HdrEgrOvflCnt)
#define cr_rcvebp CREG_IDX(RxEBPCnt)
#define cr_rcvovfl CREG_IDX(RxBufOvflCnt)
#define cr_senddropped CREG_IDX(TxDroppedPktCnt)
#define cr_sendstall CREG_IDX(TxFlowStallCnt)
#define cr_sendunderrun CREG_IDX(TxUnderrunCnt)
#define cr_wordrcv CREG_IDX(RxDwordCnt)
#define cr_wordsend CREG_IDX(TxDwordCnt)
#define cr_txunsupvl CREG_IDX(TxUnsupVLErrCnt)
#define cr_rxdroppkt CREG_IDX(RxDroppedPktCnt)
#define cr_iblinkerrrecov CREG_IDX(IBLinkErrRecoveryCnt)
#define cr_iblinkdown CREG_IDX(IBLinkDownedCnt)
#define cr_ibsymbolerr CREG_IDX(IBSymbolErrCnt)
#define cr_vl15droppedpkt CREG_IDX(RxVL15DroppedPktCnt)
#define cr_rxotherlocalphyerr CREG_IDX(RxOtherLocalPhyErrCnt)
#define cr_excessbufferovfl CREG_IDX(ExcessBufferOvflCnt)
#define cr_locallinkintegrityerr CREG_IDX(LocalLinkIntegrityErrCnt)
#define cr_rxvlerr CREG_IDX(RxVlErrCnt)
#define cr_rxdlidfltr CREG_IDX(RxDlidFltrCnt)
#define cr_psstat CREG_IDX(PSStat)
#define cr_psstart CREG_IDX(PSStart)
#define cr_psinterval CREG_IDX(PSInterval)
#define cr_psrcvdatacount CREG_IDX(PSRcvDataCount)
#define cr_psrcvpktscount CREG_IDX(PSRcvPktsCount)
#define cr_psxmitdatacount CREG_IDX(PSXmitDataCount)
#define cr_psxmitpktscount CREG_IDX(PSXmitPktsCount)
#define cr_psxmitwaitcount CREG_IDX(PSXmitWaitCount)
#define cr_txsdmadesc CREG_IDX(TxSDmaDescCnt)
#define cr_pcieretrydiag CREG_IDX(PcieRetryBufDiagQwordCnt)
#define SYM_RMASK(regname, fldname) ((u64) \
QIB_7220_##regname##_##fldname##_RMASK)
#define SYM_MASK(regname, fldname) ((u64) \
QIB_7220_##regname##_##fldname##_RMASK << \
QIB_7220_##regname##_##fldname##_LSB)
#define SYM_LSB(regname, fldname) (QIB_7220_##regname##_##fldname##_LSB)
#define SYM_FIELD(value, regname, fldname) ((u64) \
(((value) >> SYM_LSB(regname, fldname)) & \
SYM_RMASK(regname, fldname)))
#define ERR_MASK(fldname) SYM_MASK(ErrMask, fldname##Mask)
#define HWE_MASK(fldname) SYM_MASK(HwErrMask, fldname##Mask)
/* ibcctrl bits */
#define QLOGIC_IB_IBCC_LINKINITCMD_DISABLE 1
/* cycle through TS1/TS2 till OK */
#define QLOGIC_IB_IBCC_LINKINITCMD_POLL 2
/* wait for TS1, then go on */
#define QLOGIC_IB_IBCC_LINKINITCMD_SLEEP 3
#define QLOGIC_IB_IBCC_LINKINITCMD_SHIFT 16
#define QLOGIC_IB_IBCC_LINKCMD_DOWN 1 /* move to 0x11 */
#define QLOGIC_IB_IBCC_LINKCMD_ARMED 2 /* move to 0x21 */
#define QLOGIC_IB_IBCC_LINKCMD_ACTIVE 3 /* move to 0x31 */
#define BLOB_7220_IBCHG 0x81
/*
* We could have a single register get/put routine, that takes a group type,
* but this is somewhat clearer and cleaner. It also gives us some error
* checking. 64 bit register reads should always work, but are inefficient
* on opteron (the northbridge always generates 2 separate HT 32 bit reads),
* so we use kreg32 wherever possible. User register and counter register
* reads are always 32 bit reads, so only one form of those routines.
*/
/**
* qib_read_ureg32 - read 32-bit virtualized per-context register
* @dd: device
* @regno: register number
* @ctxt: context number
*
* Return the contents of a register that is virtualized to be per context.
* Returns -1 on errors (not distinguishable from valid contents at
* runtime; we may add a separate error variable at some point).
*/
static inline u32 qib_read_ureg32(const struct qib_devdata *dd,
enum qib_ureg regno, int ctxt)
{
if (!dd->kregbase || !(dd->flags & QIB_PRESENT))
return 0;
if (dd->userbase)
return readl(regno + (u64 __iomem *)
((char __iomem *)dd->userbase +
dd->ureg_align * ctxt));
else
return readl(regno + (u64 __iomem *)
(dd->uregbase +
(char __iomem *)dd->kregbase +
dd->ureg_align * ctxt));
}
/**
* qib_write_ureg - write 32-bit virtualized per-context register
* @dd: device
* @regno: register number
* @value: value
* @ctxt: context
*
* Write the contents of a register that is virtualized to be per context.
*/
static inline void qib_write_ureg(const struct qib_devdata *dd,
enum qib_ureg regno, u64 value, int ctxt)
{
u64 __iomem *ubase;
if (dd->userbase)
ubase = (u64 __iomem *)
((char __iomem *) dd->userbase +
dd->ureg_align * ctxt);
else
ubase = (u64 __iomem *)
(dd->uregbase +
(char __iomem *) dd->kregbase +
dd->ureg_align * ctxt);
if (dd->kregbase && (dd->flags & QIB_PRESENT))
writeq(value, &ubase[regno]);
}
/**
* qib_write_kreg_ctxt - write a device's per-ctxt 64-bit kernel register
* @dd: the qlogic_ib device
* @regno: the register number to write
* @ctxt: the context containing the register
* @value: the value to write
*/
static inline void qib_write_kreg_ctxt(const struct qib_devdata *dd,
const u16 regno, unsigned ctxt,
u64 value)
{
qib_write_kreg(dd, regno + ctxt, value);
}
static inline void write_7220_creg(const struct qib_devdata *dd,
u16 regno, u64 value)
{
if (dd->cspec->cregbase && (dd->flags & QIB_PRESENT))
writeq(value, &dd->cspec->cregbase[regno]);
}
static inline u64 read_7220_creg(const struct qib_devdata *dd, u16 regno)
{
if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
return 0;
return readq(&dd->cspec->cregbase[regno]);
}
static inline u32 read_7220_creg32(const struct qib_devdata *dd, u16 regno)
{
if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
return 0;
return readl(&dd->cspec->cregbase[regno]);
}
/* kr_revision bits */
#define QLOGIC_IB_R_EMULATORREV_MASK ((1ULL << 22) - 1)
#define QLOGIC_IB_R_EMULATORREV_SHIFT 40
/* kr_control bits */
#define QLOGIC_IB_C_RESET (1U << 7)
/* kr_intstatus, kr_intclear, kr_intmask bits */
#define QLOGIC_IB_I_RCVURG_MASK ((1ULL << 17) - 1)
#define QLOGIC_IB_I_RCVURG_SHIFT 32
#define QLOGIC_IB_I_RCVAVAIL_MASK ((1ULL << 17) - 1)
#define QLOGIC_IB_I_RCVAVAIL_SHIFT 0
#define QLOGIC_IB_I_SERDESTRIMDONE (1ULL << 27)
#define QLOGIC_IB_C_FREEZEMODE 0x00000002
#define QLOGIC_IB_C_LINKENABLE 0x00000004
#define QLOGIC_IB_I_SDMAINT 0x8000000000000000ULL
#define QLOGIC_IB_I_SDMADISABLED 0x4000000000000000ULL
#define QLOGIC_IB_I_ERROR 0x0000000080000000ULL
#define QLOGIC_IB_I_SPIOSENT 0x0000000040000000ULL
#define QLOGIC_IB_I_SPIOBUFAVAIL 0x0000000020000000ULL
#define QLOGIC_IB_I_GPIO 0x0000000010000000ULL
/* variables for sanity checking interrupt and errors */
#define QLOGIC_IB_I_BITSEXTANT \
(QLOGIC_IB_I_SDMAINT | QLOGIC_IB_I_SDMADISABLED | \
(QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT) | \
(QLOGIC_IB_I_RCVAVAIL_MASK << \
QLOGIC_IB_I_RCVAVAIL_SHIFT) | \
QLOGIC_IB_I_ERROR | QLOGIC_IB_I_SPIOSENT | \
QLOGIC_IB_I_SPIOBUFAVAIL | QLOGIC_IB_I_GPIO | \
QLOGIC_IB_I_SERDESTRIMDONE)
#define IB_HWE_BITSEXTANT \
(HWE_MASK(RXEMemParityErr) | \
HWE_MASK(TXEMemParityErr) | \
(QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK << \
QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) | \
QLOGIC_IB_HWE_PCIE1PLLFAILED | \
QLOGIC_IB_HWE_PCIE0PLLFAILED | \
QLOGIC_IB_HWE_PCIEPOISONEDTLP | \
QLOGIC_IB_HWE_PCIECPLTIMEOUT | \
QLOGIC_IB_HWE_PCIEBUSPARITYXTLH | \
QLOGIC_IB_HWE_PCIEBUSPARITYXADM | \
QLOGIC_IB_HWE_PCIEBUSPARITYRADM | \
HWE_MASK(PowerOnBISTFailed) | \
QLOGIC_IB_HWE_COREPLL_FBSLIP | \
QLOGIC_IB_HWE_COREPLL_RFSLIP | \
QLOGIC_IB_HWE_SERDESPLLFAILED | \
HWE_MASK(IBCBusToSPCParityErr) | \
HWE_MASK(IBCBusFromSPCParityErr) | \
QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR | \
QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR | \
QLOGIC_IB_HWE_SDMAMEMREADERR | \
QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED | \
QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT | \
QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT | \
QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT | \
QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT | \
QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR | \
QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR | \
QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR | \
QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR)
#define IB_E_BITSEXTANT \
(ERR_MASK(RcvFormatErr) | ERR_MASK(RcvVCRCErr) | \
ERR_MASK(RcvICRCErr) | ERR_MASK(RcvMinPktLenErr) | \
ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvLongPktLenErr) | \
ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvUnexpectedCharErr) | \
ERR_MASK(RcvUnsupportedVLErr) | ERR_MASK(RcvEBPErr) | \
ERR_MASK(RcvIBFlowErr) | ERR_MASK(RcvBadVersionErr) | \
ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) | \
ERR_MASK(RcvBadTidErr) | ERR_MASK(RcvHdrLenErr) | \
ERR_MASK(RcvHdrErr) | ERR_MASK(RcvIBLostLinkErr) | \
ERR_MASK(SendSpecialTriggerErr) | \
ERR_MASK(SDmaDisabledErr) | ERR_MASK(SendMinPktLenErr) | \
ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnderRunErr) | \
ERR_MASK(SendPktLenErr) | ERR_MASK(SendDroppedSmpPktErr) | \
ERR_MASK(SendDroppedDataPktErr) | \
ERR_MASK(SendPioArmLaunchErr) | \
ERR_MASK(SendUnexpectedPktNumErr) | \
ERR_MASK(SendUnsupportedVLErr) | ERR_MASK(SendBufMisuseErr) | \
ERR_MASK(SDmaGenMismatchErr) | ERR_MASK(SDmaOutOfBoundErr) | \
ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) | \
ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) | \
ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) | \
ERR_MASK(SDmaUnexpDataErr) | \
ERR_MASK(IBStatusChanged) | ERR_MASK(InvalidAddrErr) | \
ERR_MASK(ResetNegated) | ERR_MASK(HardwareErr) | \
ERR_MASK(SDmaDescAddrMisalignErr) | \
ERR_MASK(InvalidEEPCmd))
/* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
#define QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK 0x00000000000000ffULL
#define QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT 0
#define QLOGIC_IB_HWE_PCIEPOISONEDTLP 0x0000000010000000ULL
#define QLOGIC_IB_HWE_PCIECPLTIMEOUT 0x0000000020000000ULL
#define QLOGIC_IB_HWE_PCIEBUSPARITYXTLH 0x0000000040000000ULL
#define QLOGIC_IB_HWE_PCIEBUSPARITYXADM 0x0000000080000000ULL
#define QLOGIC_IB_HWE_PCIEBUSPARITYRADM 0x0000000100000000ULL
#define QLOGIC_IB_HWE_COREPLL_FBSLIP 0x0080000000000000ULL
#define QLOGIC_IB_HWE_COREPLL_RFSLIP 0x0100000000000000ULL
#define QLOGIC_IB_HWE_PCIE1PLLFAILED 0x0400000000000000ULL
#define QLOGIC_IB_HWE_PCIE0PLLFAILED 0x0800000000000000ULL
#define QLOGIC_IB_HWE_SERDESPLLFAILED 0x1000000000000000ULL
/* specific to this chip */
#define QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR 0x0000000000000040ULL
#define QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR 0x0000000000000080ULL
#define QLOGIC_IB_HWE_SDMAMEMREADERR 0x0000000010000000ULL
#define QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED 0x2000000000000000ULL
#define QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT 0x0100000000000000ULL
#define QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT 0x0200000000000000ULL
#define QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT 0x0400000000000000ULL
#define QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT 0x0800000000000000ULL
#define QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR 0x0000008000000000ULL
#define QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR 0x0000004000000000ULL
#define QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR 0x0000001000000000ULL
#define QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR 0x0000002000000000ULL
#define IBA7220_IBCC_LINKCMD_SHIFT 19
/* kr_ibcddrctrl bits */
#define IBA7220_IBC_DLIDLMC_MASK 0xFFFFFFFFUL
#define IBA7220_IBC_DLIDLMC_SHIFT 32
#define IBA7220_IBC_HRTBT_MASK (SYM_RMASK(IBCDDRCtrl, HRTBT_AUTO) | \
SYM_RMASK(IBCDDRCtrl, HRTBT_ENB))
#define IBA7220_IBC_HRTBT_SHIFT SYM_LSB(IBCDDRCtrl, HRTBT_ENB)
#define IBA7220_IBC_LANE_REV_SUPPORTED (1<<8)
#define IBA7220_IBC_LREV_MASK 1
#define IBA7220_IBC_LREV_SHIFT 8
#define IBA7220_IBC_RXPOL_MASK 1
#define IBA7220_IBC_RXPOL_SHIFT 7
#define IBA7220_IBC_WIDTH_SHIFT 5
#define IBA7220_IBC_WIDTH_MASK 0x3
#define IBA7220_IBC_WIDTH_1X_ONLY (0 << IBA7220_IBC_WIDTH_SHIFT)
#define IBA7220_IBC_WIDTH_4X_ONLY (1 << IBA7220_IBC_WIDTH_SHIFT)
#define IBA7220_IBC_WIDTH_AUTONEG (2 << IBA7220_IBC_WIDTH_SHIFT)
#define IBA7220_IBC_SPEED_AUTONEG (1 << 1)
#define IBA7220_IBC_SPEED_SDR (1 << 2)
#define IBA7220_IBC_SPEED_DDR (1 << 3)
#define IBA7220_IBC_SPEED_AUTONEG_MASK (0x7 << 1)
#define IBA7220_IBC_IBTA_1_2_MASK (1)
/* kr_ibcddrstatus */
/* link latency shift is 0, don't bother defining */
#define IBA7220_DDRSTAT_LINKLAT_MASK 0x3ffffff
/* kr_extstatus bits */
#define QLOGIC_IB_EXTS_FREQSEL 0x2
#define QLOGIC_IB_EXTS_SERDESSEL 0x4
#define QLOGIC_IB_EXTS_MEMBIST_ENDTEST 0x0000000000004000
#define QLOGIC_IB_EXTS_MEMBIST_DISABLED 0x0000000000008000
/* kr_xgxsconfig bits */
#define QLOGIC_IB_XGXS_RESET 0x5ULL
#define QLOGIC_IB_XGXS_FC_SAFE (1ULL << 63)
/* kr_rcvpktledcnt */
#define IBA7220_LEDBLINK_ON_SHIFT 32 /* 4ns period on after packet */
#define IBA7220_LEDBLINK_OFF_SHIFT 0 /* 4ns period off before next on */
#define _QIB_GPIO_SDA_NUM 1
#define _QIB_GPIO_SCL_NUM 0
#define QIB_TWSI_EEPROM_DEV 0xA2 /* All Production 7220 cards. */
#define QIB_TWSI_TEMP_DEV 0x98
/* HW counter clock is at 4nsec */
#define QIB_7220_PSXMITWAIT_CHECK_RATE 4000
#define IBA7220_R_INTRAVAIL_SHIFT 17
#define IBA7220_R_PKEY_DIS_SHIFT 34
#define IBA7220_R_TAILUPD_SHIFT 35
#define IBA7220_R_CTXTCFG_SHIFT 36
#define IBA7220_HDRHEAD_PKTINT_SHIFT 32 /* interrupt cnt in upper 32 bits */
/*
* the size bits give us 2^N, in KB units. 0 marks as invalid,
* and 7 is reserved. We currently use only 2KB and 4KB
*/
#define IBA7220_TID_SZ_SHIFT 37 /* shift to 3bit size selector */
#define IBA7220_TID_SZ_2K (1UL << IBA7220_TID_SZ_SHIFT) /* 2KB */
#define IBA7220_TID_SZ_4K (2UL << IBA7220_TID_SZ_SHIFT) /* 4KB */
#define IBA7220_TID_PA_SHIFT 11U /* TID addr in chip stored w/o low bits */
#define PBC_7220_VL15_SEND (1ULL << 63) /* pbc; VL15, no credit check */
#define PBC_7220_VL15_SEND_CTRL (1ULL << 31) /* control version of same */
#define AUTONEG_TRIES 5 /* sequential retries to negotiate DDR */
/* packet rate matching delay multiplier */
static u8 rate_to_delay[2][2] = {
/* 1x, 4x */
{ 8, 2 }, /* SDR */
{ 4, 1 } /* DDR */
};
static u8 ib_rate_to_delay[IB_RATE_120_GBPS + 1] = {
[IB_RATE_2_5_GBPS] = 8,
[IB_RATE_5_GBPS] = 4,
[IB_RATE_10_GBPS] = 2,
[IB_RATE_20_GBPS] = 1
};
#define IBA7220_LINKSPEED_SHIFT SYM_LSB(IBCStatus, LinkSpeedActive)
#define IBA7220_LINKWIDTH_SHIFT SYM_LSB(IBCStatus, LinkWidthActive)
/* link training states, from IBC */
#define IB_7220_LT_STATE_DISABLED 0x00
#define IB_7220_LT_STATE_LINKUP 0x01
#define IB_7220_LT_STATE_POLLACTIVE 0x02
#define IB_7220_LT_STATE_POLLQUIET 0x03
#define IB_7220_LT_STATE_SLEEPDELAY 0x04
#define IB_7220_LT_STATE_SLEEPQUIET 0x05
#define IB_7220_LT_STATE_CFGDEBOUNCE 0x08
#define IB_7220_LT_STATE_CFGRCVFCFG 0x09
#define IB_7220_LT_STATE_CFGWAITRMT 0x0a
#define IB_7220_LT_STATE_CFGIDLE 0x0b
#define IB_7220_LT_STATE_RECOVERRETRAIN 0x0c
#define IB_7220_LT_STATE_RECOVERWAITRMT 0x0e
#define IB_7220_LT_STATE_RECOVERIDLE 0x0f
/* link state machine states from IBC */
#define IB_7220_L_STATE_DOWN 0x0
#define IB_7220_L_STATE_INIT 0x1
#define IB_7220_L_STATE_ARM 0x2
#define IB_7220_L_STATE_ACTIVE 0x3
#define IB_7220_L_STATE_ACT_DEFER 0x4
static const u8 qib_7220_physportstate[0x20] = {
[IB_7220_LT_STATE_DISABLED] = IB_PHYSPORTSTATE_DISABLED,
[IB_7220_LT_STATE_LINKUP] = IB_PHYSPORTSTATE_LINKUP,
[IB_7220_LT_STATE_POLLACTIVE] = IB_PHYSPORTSTATE_POLL,
[IB_7220_LT_STATE_POLLQUIET] = IB_PHYSPORTSTATE_POLL,
[IB_7220_LT_STATE_SLEEPDELAY] = IB_PHYSPORTSTATE_SLEEP,
[IB_7220_LT_STATE_SLEEPQUIET] = IB_PHYSPORTSTATE_SLEEP,
[IB_7220_LT_STATE_CFGDEBOUNCE] =
IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_7220_LT_STATE_CFGRCVFCFG] =
IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_7220_LT_STATE_CFGWAITRMT] =
IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_7220_LT_STATE_CFGIDLE] = IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_7220_LT_STATE_RECOVERRETRAIN] =
IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
[IB_7220_LT_STATE_RECOVERWAITRMT] =
IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
[IB_7220_LT_STATE_RECOVERIDLE] =
IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
[0x10] = IB_PHYSPORTSTATE_CFG_TRAIN,
[0x11] = IB_PHYSPORTSTATE_CFG_TRAIN,
[0x12] = IB_PHYSPORTSTATE_CFG_TRAIN,
[0x13] = IB_PHYSPORTSTATE_CFG_TRAIN,
[0x14] = IB_PHYSPORTSTATE_CFG_TRAIN,
[0x15] = IB_PHYSPORTSTATE_CFG_TRAIN,
[0x16] = IB_PHYSPORTSTATE_CFG_TRAIN,
[0x17] = IB_PHYSPORTSTATE_CFG_TRAIN
};
int qib_special_trigger;
module_param_named(special_trigger, qib_special_trigger, int, S_IRUGO);
MODULE_PARM_DESC(special_trigger, "Enable SpecialTrigger arm/launch");
#define IBCBUSFRSPCPARITYERR HWE_MASK(IBCBusFromSPCParityErr)
#define IBCBUSTOSPCPARITYERR HWE_MASK(IBCBusToSPCParityErr)
#define SYM_MASK_BIT(regname, fldname, bit) ((u64) \
(1ULL << (SYM_LSB(regname, fldname) + (bit))))
#define TXEMEMPARITYERR_PIOBUF \
SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 0)
#define TXEMEMPARITYERR_PIOPBC \
SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 1)
#define TXEMEMPARITYERR_PIOLAUNCHFIFO \
SYM_MASK_BIT(HwErrMask, TXEMemParityErrMask, 2)
#define RXEMEMPARITYERR_RCVBUF \
SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 0)
#define RXEMEMPARITYERR_LOOKUPQ \
SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 1)
#define RXEMEMPARITYERR_EXPTID \
SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 2)
#define RXEMEMPARITYERR_EAGERTID \
SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 3)
#define RXEMEMPARITYERR_FLAGBUF \
SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 4)
#define RXEMEMPARITYERR_DATAINFO \
SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 5)
#define RXEMEMPARITYERR_HDRINFO \
SYM_MASK_BIT(HwErrMask, RXEMemParityErrMask, 6)
/* 7220 specific hardware errors... */
static const struct qib_hwerror_msgs qib_7220_hwerror_msgs[] = {
/* generic hardware errors */
QLOGIC_IB_HWE_MSG(IBCBUSFRSPCPARITYERR, "QIB2IB Parity"),
QLOGIC_IB_HWE_MSG(IBCBUSTOSPCPARITYERR, "IB2QIB Parity"),
QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOBUF,
"TXE PIOBUF Memory Parity"),
QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOPBC,
"TXE PIOPBC Memory Parity"),
QLOGIC_IB_HWE_MSG(TXEMEMPARITYERR_PIOLAUNCHFIFO,
"TXE PIOLAUNCHFIFO Memory Parity"),
QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_RCVBUF,
"RXE RCVBUF Memory Parity"),
QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_LOOKUPQ,
"RXE LOOKUPQ Memory Parity"),
QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EAGERTID,
"RXE EAGERTID Memory Parity"),
QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_EXPTID,
"RXE EXPTID Memory Parity"),
QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_FLAGBUF,
"RXE FLAGBUF Memory Parity"),
QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_DATAINFO,
"RXE DATAINFO Memory Parity"),
QLOGIC_IB_HWE_MSG(RXEMEMPARITYERR_HDRINFO,
"RXE HDRINFO Memory Parity"),
/* chip-specific hardware errors */
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEPOISONEDTLP,
"PCIe Poisoned TLP"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLTIMEOUT,
"PCIe completion timeout"),
/*
* In practice, it's unlikely wthat we'll see PCIe PLL, or bus
* parity or memory parity error failures, because most likely we
* won't be able to talk to the core of the chip. Nonetheless, we
* might see them, if they are in parts of the PCIe core that aren't
* essential.
*/
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE1PLLFAILED,
"PCIePLL1"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE0PLLFAILED,
"PCIePLL0"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXTLH,
"PCIe XTLH core parity"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYXADM,
"PCIe ADM TX core parity"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIEBUSPARITYRADM,
"PCIe ADM RX core parity"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SERDESPLLFAILED,
"SerDes PLL"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLDATAQUEUEERR,
"PCIe cpl header queue"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIECPLHDRQUEUEERR,
"PCIe cpl data queue"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_SDMAMEMREADERR,
"Send DMA memory read"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_CLK_UC_PLLNOTLOCKED,
"uC PLL clock not locked"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ0PCLKNOTDETECT,
"PCIe serdes Q0 no clock"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ1PCLKNOTDETECT,
"PCIe serdes Q1 no clock"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ2PCLKNOTDETECT,
"PCIe serdes Q2 no clock"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIESERDESQ3PCLKNOTDETECT,
"PCIe serdes Q3 no clock"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_DDSRXEQMEMORYPARITYERR,
"DDS RXEQ memory parity"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR,
"IB uC memory parity"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT0MEMORYPARITYERR,
"PCIe uC oct0 memory parity"),
QLOGIC_IB_HWE_MSG(QLOGIC_IB_HWE_PCIE_UC_OCT1MEMORYPARITYERR,
"PCIe uC oct1 memory parity"),
};
#define RXE_PARITY (RXEMEMPARITYERR_EAGERTID|RXEMEMPARITYERR_EXPTID)
#define QLOGIC_IB_E_PKTERRS (\
ERR_MASK(SendPktLenErr) | \
ERR_MASK(SendDroppedDataPktErr) | \
ERR_MASK(RcvVCRCErr) | \
ERR_MASK(RcvICRCErr) | \
ERR_MASK(RcvShortPktLenErr) | \
ERR_MASK(RcvEBPErr))
/* Convenience for decoding Send DMA errors */
#define QLOGIC_IB_E_SDMAERRS ( \
ERR_MASK(SDmaGenMismatchErr) | \
ERR_MASK(SDmaOutOfBoundErr) | \
ERR_MASK(SDmaTailOutOfBoundErr) | ERR_MASK(SDmaBaseErr) | \
ERR_MASK(SDma1stDescErr) | ERR_MASK(SDmaRpyTagErr) | \
ERR_MASK(SDmaDwEnErr) | ERR_MASK(SDmaMissingDwErr) | \
ERR_MASK(SDmaUnexpDataErr) | \
ERR_MASK(SDmaDescAddrMisalignErr) | \
ERR_MASK(SDmaDisabledErr) | \
ERR_MASK(SendBufMisuseErr))
/* These are all rcv-related errors which we want to count for stats */
#define E_SUM_PKTERRS \
(ERR_MASK(RcvHdrLenErr) | ERR_MASK(RcvBadTidErr) | \
ERR_MASK(RcvBadVersionErr) | ERR_MASK(RcvHdrErr) | \
ERR_MASK(RcvLongPktLenErr) | ERR_MASK(RcvShortPktLenErr) | \
ERR_MASK(RcvMaxPktLenErr) | ERR_MASK(RcvMinPktLenErr) | \
ERR_MASK(RcvFormatErr) | ERR_MASK(RcvUnsupportedVLErr) | \
ERR_MASK(RcvUnexpectedCharErr) | ERR_MASK(RcvEBPErr))
/* These are all send-related errors which we want to count for stats */
#define E_SUM_ERRS \
(ERR_MASK(SendPioArmLaunchErr) | ERR_MASK(SendUnexpectedPktNumErr) | \
ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendUnsupportedVLErr) | \
ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) | \
ERR_MASK(InvalidAddrErr))
/*
* this is similar to E_SUM_ERRS, but can't ignore armlaunch, don't ignore
* errors not related to freeze and cancelling buffers. Can't ignore
* armlaunch because could get more while still cleaning up, and need
* to cancel those as they happen.
*/
#define E_SPKT_ERRS_IGNORE \
(ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
ERR_MASK(SendMaxPktLenErr) | ERR_MASK(SendMinPktLenErr) | \
ERR_MASK(SendPktLenErr))
/*
* these are errors that can occur when the link changes state while
* a packet is being sent or received. This doesn't cover things
* like EBP or VCRC that can be the result of a sending having the
* link change state, so we receive a "known bad" packet.
*/
#define E_SUM_LINK_PKTERRS \
(ERR_MASK(SendDroppedDataPktErr) | ERR_MASK(SendDroppedSmpPktErr) | \
ERR_MASK(SendMinPktLenErr) | ERR_MASK(SendPktLenErr) | \
ERR_MASK(RcvShortPktLenErr) | ERR_MASK(RcvMinPktLenErr) | \
ERR_MASK(RcvUnexpectedCharErr))
static void autoneg_7220_work(struct work_struct *);
static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *, u64, u32 *);
/*
* Called when we might have an error that is specific to a particular
* PIO buffer, and may need to cancel that buffer, so it can be re-used.
* because we don't need to force the update of pioavail.
*/
static void qib_disarm_7220_senderrbufs(struct qib_pportdata *ppd)
{
unsigned long sbuf[3];
struct qib_devdata *dd = ppd->dd;
/*
* It's possible that sendbuffererror could have bits set; might
* have already done this as a result of hardware error handling.
*/
/* read these before writing errorclear */
sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
if (sbuf[0] || sbuf[1] || sbuf[2])
qib_disarm_piobufs_set(dd, sbuf,
dd->piobcnt2k + dd->piobcnt4k);
}
static void qib_7220_txe_recover(struct qib_devdata *dd)
{
qib_devinfo(dd->pcidev, "Recovering from TXE PIO parity error\n");
qib_disarm_7220_senderrbufs(dd->pport);
}
/*
* This is called with interrupts disabled and sdma_lock held.
*/
static void qib_7220_sdma_sendctrl(struct qib_pportdata *ppd, unsigned op)
{
struct qib_devdata *dd = ppd->dd;
u64 set_sendctrl = 0;
u64 clr_sendctrl = 0;
if (op & QIB_SDMA_SENDCTRL_OP_ENABLE)
set_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
else
clr_sendctrl |= SYM_MASK(SendCtrl, SDmaEnable);
if (op & QIB_SDMA_SENDCTRL_OP_INTENABLE)
set_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
else
clr_sendctrl |= SYM_MASK(SendCtrl, SDmaIntEnable);
if (op & QIB_SDMA_SENDCTRL_OP_HALT)
set_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
else
clr_sendctrl |= SYM_MASK(SendCtrl, SDmaHalt);
spin_lock(&dd->sendctrl_lock);
dd->sendctrl |= set_sendctrl;
dd->sendctrl &= ~clr_sendctrl;
qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
qib_write_kreg(dd, kr_scratch, 0);
spin_unlock(&dd->sendctrl_lock);
}
static void qib_decode_7220_sdma_errs(struct qib_pportdata *ppd,
u64 err, char *buf, size_t blen)
{
static const struct {
u64 err;
const char *msg;
} errs[] = {
{ ERR_MASK(SDmaGenMismatchErr),
"SDmaGenMismatch" },
{ ERR_MASK(SDmaOutOfBoundErr),
"SDmaOutOfBound" },
{ ERR_MASK(SDmaTailOutOfBoundErr),
"SDmaTailOutOfBound" },
{ ERR_MASK(SDmaBaseErr),
"SDmaBase" },
{ ERR_MASK(SDma1stDescErr),
"SDma1stDesc" },
{ ERR_MASK(SDmaRpyTagErr),
"SDmaRpyTag" },
{ ERR_MASK(SDmaDwEnErr),
"SDmaDwEn" },
{ ERR_MASK(SDmaMissingDwErr),
"SDmaMissingDw" },
{ ERR_MASK(SDmaUnexpDataErr),
"SDmaUnexpData" },
{ ERR_MASK(SDmaDescAddrMisalignErr),
"SDmaDescAddrMisalign" },
{ ERR_MASK(SendBufMisuseErr),
"SendBufMisuse" },
{ ERR_MASK(SDmaDisabledErr),
"SDmaDisabled" },
};
int i;
size_t bidx = 0;
for (i = 0; i < ARRAY_SIZE(errs); i++) {
if (err & errs[i].err)
bidx += scnprintf(buf + bidx, blen - bidx,
"%s ", errs[i].msg);
}
}
/*
* This is called as part of link down clean up so disarm and flush
* all send buffers so that SMP packets can be sent.
*/
static void qib_7220_sdma_hw_clean_up(struct qib_pportdata *ppd)
{
/* This will trigger the Abort interrupt */
sendctrl_7220_mod(ppd, QIB_SENDCTRL_DISARM_ALL | QIB_SENDCTRL_FLUSH |
QIB_SENDCTRL_AVAIL_BLIP);
ppd->dd->upd_pio_shadow = 1; /* update our idea of what's busy */
}
static void qib_sdma_7220_setlengen(struct qib_pportdata *ppd)
{
/*
* Set SendDmaLenGen and clear and set
* the MSB of the generation count to enable generation checking
* and load the internal generation counter.
*/
qib_write_kreg(ppd->dd, kr_senddmalengen, ppd->sdma_descq_cnt);
qib_write_kreg(ppd->dd, kr_senddmalengen,
ppd->sdma_descq_cnt |
(1ULL << QIB_7220_SendDmaLenGen_Generation_MSB));
}
static void qib_7220_sdma_hw_start_up(struct qib_pportdata *ppd)
{
qib_sdma_7220_setlengen(ppd);
qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
ppd->sdma_head_dma[0] = 0;
}
#define DISABLES_SDMA ( \
ERR_MASK(SDmaDisabledErr) | \
ERR_MASK(SDmaBaseErr) | \
ERR_MASK(SDmaTailOutOfBoundErr) | \
ERR_MASK(SDmaOutOfBoundErr) | \
ERR_MASK(SDma1stDescErr) | \
ERR_MASK(SDmaRpyTagErr) | \
ERR_MASK(SDmaGenMismatchErr) | \
ERR_MASK(SDmaDescAddrMisalignErr) | \
ERR_MASK(SDmaMissingDwErr) | \
ERR_MASK(SDmaDwEnErr))
static void sdma_7220_errors(struct qib_pportdata *ppd, u64 errs)
{
unsigned long flags;
struct qib_devdata *dd = ppd->dd;
char *msg;
errs &= QLOGIC_IB_E_SDMAERRS;
msg = dd->cspec->sdmamsgbuf;
qib_decode_7220_sdma_errs(ppd, errs, msg,
sizeof(dd->cspec->sdmamsgbuf));
spin_lock_irqsave(&ppd->sdma_lock, flags);
if (errs & ERR_MASK(SendBufMisuseErr)) {
unsigned long sbuf[3];
sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
sbuf[2] = qib_read_kreg64(dd, kr_sendbuffererror + 2);
qib_dev_err(ppd->dd,
"IB%u:%u SendBufMisuse: %04lx %016lx %016lx\n",
ppd->dd->unit, ppd->port, sbuf[2], sbuf[1],
sbuf[0]);
}
if (errs & ERR_MASK(SDmaUnexpDataErr))
qib_dev_err(dd, "IB%u:%u SDmaUnexpData\n", ppd->dd->unit,
ppd->port);
switch (ppd->sdma_state.current_state) {
case qib_sdma_state_s00_hw_down:
/* not expecting any interrupts */
break;
case qib_sdma_state_s10_hw_start_up_wait:
/* handled in intr path */
break;
case qib_sdma_state_s20_idle:
/* not expecting any interrupts */
break;
case qib_sdma_state_s30_sw_clean_up_wait:
/* not expecting any interrupts */
break;
case qib_sdma_state_s40_hw_clean_up_wait:
if (errs & ERR_MASK(SDmaDisabledErr))
__qib_sdma_process_event(ppd,
qib_sdma_event_e50_hw_cleaned);
break;
case qib_sdma_state_s50_hw_halt_wait:
/* handled in intr path */
break;
case qib_sdma_state_s99_running:
if (errs & DISABLES_SDMA)
__qib_sdma_process_event(ppd,
qib_sdma_event_e7220_err_halted);
break;
}
spin_unlock_irqrestore(&ppd->sdma_lock, flags);
}
/*
* Decode the error status into strings, deciding whether to always
* print * it or not depending on "normal packet errors" vs everything
* else. Return 1 if "real" errors, otherwise 0 if only packet
* errors, so caller can decide what to print with the string.
*/
static int qib_decode_7220_err(struct qib_devdata *dd, char *buf, size_t blen,
u64 err)
{
int iserr = 1;
*buf = '\0';
if (err & QLOGIC_IB_E_PKTERRS) {
if (!(err & ~QLOGIC_IB_E_PKTERRS))
iserr = 0;
if ((err & ERR_MASK(RcvICRCErr)) &&
!(err & (ERR_MASK(RcvVCRCErr) | ERR_MASK(RcvEBPErr))))
strlcat(buf, "CRC ", blen);
if (!iserr)
goto done;
}
if (err & ERR_MASK(RcvHdrLenErr))
strlcat(buf, "rhdrlen ", blen);
if (err & ERR_MASK(RcvBadTidErr))
strlcat(buf, "rbadtid ", blen);
if (err & ERR_MASK(RcvBadVersionErr))
strlcat(buf, "rbadversion ", blen);
if (err & ERR_MASK(RcvHdrErr))
strlcat(buf, "rhdr ", blen);
if (err & ERR_MASK(SendSpecialTriggerErr))
strlcat(buf, "sendspecialtrigger ", blen);
if (err & ERR_MASK(RcvLongPktLenErr))
strlcat(buf, "rlongpktlen ", blen);
if (err & ERR_MASK(RcvMaxPktLenErr))
strlcat(buf, "rmaxpktlen ", blen);
if (err & ERR_MASK(RcvMinPktLenErr))
strlcat(buf, "rminpktlen ", blen);
if (err & ERR_MASK(SendMinPktLenErr))
strlcat(buf, "sminpktlen ", blen);
if (err & ERR_MASK(RcvFormatErr))
strlcat(buf, "rformaterr ", blen);
if (err & ERR_MASK(RcvUnsupportedVLErr))
strlcat(buf, "runsupvl ", blen);
if (err & ERR_MASK(RcvUnexpectedCharErr))
strlcat(buf, "runexpchar ", blen);
if (err & ERR_MASK(RcvIBFlowErr))
strlcat(buf, "ribflow ", blen);
if (err & ERR_MASK(SendUnderRunErr))
strlcat(buf, "sunderrun ", blen);
if (err & ERR_MASK(SendPioArmLaunchErr))
strlcat(buf, "spioarmlaunch ", blen);
if (err & ERR_MASK(SendUnexpectedPktNumErr))
strlcat(buf, "sunexperrpktnum ", blen);
if (err & ERR_MASK(SendDroppedSmpPktErr))
strlcat(buf, "sdroppedsmppkt ", blen);
if (err & ERR_MASK(SendMaxPktLenErr))
strlcat(buf, "smaxpktlen ", blen);
if (err & ERR_MASK(SendUnsupportedVLErr))
strlcat(buf, "sunsupVL ", blen);
if (err & ERR_MASK(InvalidAddrErr))
strlcat(buf, "invalidaddr ", blen);
if (err & ERR_MASK(RcvEgrFullErr))
strlcat(buf, "rcvegrfull ", blen);
if (err & ERR_MASK(RcvHdrFullErr))
strlcat(buf, "rcvhdrfull ", blen);
if (err & ERR_MASK(IBStatusChanged))
strlcat(buf, "ibcstatuschg ", blen);
if (err & ERR_MASK(RcvIBLostLinkErr))
strlcat(buf, "riblostlink ", blen);
if (err & ERR_MASK(HardwareErr))
strlcat(buf, "hardware ", blen);
if (err & ERR_MASK(ResetNegated))
strlcat(buf, "reset ", blen);
if (err & QLOGIC_IB_E_SDMAERRS)
qib_decode_7220_sdma_errs(dd->pport, err, buf, blen);
if (err & ERR_MASK(InvalidEEPCmd))
strlcat(buf, "invalideepromcmd ", blen);
done:
return iserr;
}
static void reenable_7220_chase(unsigned long opaque)
{
struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;
ppd->cpspec->chase_timer.expires = 0;
qib_set_ib_7220_lstate(ppd, QLOGIC_IB_IBCC_LINKCMD_DOWN,
QLOGIC_IB_IBCC_LINKINITCMD_POLL);
}
static void handle_7220_chase(struct qib_pportdata *ppd, u64 ibcst)
{
u8 ibclt;
unsigned long tnow;
ibclt = (u8)SYM_FIELD(ibcst, IBCStatus, LinkTrainingState);
/*
* Detect and handle the state chase issue, where we can
* get stuck if we are unlucky on timing on both sides of
* the link. If we are, we disable, set a timer, and
* then re-enable.
*/
switch (ibclt) {
case IB_7220_LT_STATE_CFGRCVFCFG:
case IB_7220_LT_STATE_CFGWAITRMT:
case IB_7220_LT_STATE_TXREVLANES:
case IB_7220_LT_STATE_CFGENH:
tnow = jiffies;
if (ppd->cpspec->chase_end &&
time_after(tnow, ppd->cpspec->chase_end)) {
ppd->cpspec->chase_end = 0;
qib_set_ib_7220_lstate(ppd,
QLOGIC_IB_IBCC_LINKCMD_DOWN,
QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
ppd->cpspec->chase_timer.expires = jiffies +
QIB_CHASE_DIS_TIME;
add_timer(&ppd->cpspec->chase_timer);
} else if (!ppd->cpspec->chase_end)
ppd->cpspec->chase_end = tnow + QIB_CHASE_TIME;
break;
default:
ppd->cpspec->chase_end = 0;
break;
}
}
static void handle_7220_errors(struct qib_devdata *dd, u64 errs)
{
char *msg;
u64 ignore_this_time = 0;
u64 iserr = 0;
int log_idx;
struct qib_pportdata *ppd = dd->pport;
u64 mask;
/* don't report errors that are masked */
errs &= dd->cspec->errormask;
msg = dd->cspec->emsgbuf;
/* do these first, they are most important */
if (errs & ERR_MASK(HardwareErr))
qib_7220_handle_hwerrors(dd, msg, sizeof(dd->cspec->emsgbuf));
else
for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
if (errs & dd->eep_st_masks[log_idx].errs_to_log)
qib_inc_eeprom_err(dd, log_idx, 1);
if (errs & QLOGIC_IB_E_SDMAERRS)
sdma_7220_errors(ppd, errs);
if (errs & ~IB_E_BITSEXTANT)
qib_dev_err(dd,
"error interrupt with unknown errors %llx set\n",
(unsigned long long) (errs & ~IB_E_BITSEXTANT));
if (errs & E_SUM_ERRS) {
qib_disarm_7220_senderrbufs(ppd);
if ((errs & E_SUM_LINK_PKTERRS) &&
!(ppd->lflags & QIBL_LINKACTIVE)) {
/*
* This can happen when trying to bring the link
* up, but the IB link changes state at the "wrong"
* time. The IB logic then complains that the packet
* isn't valid. We don't want to confuse people, so
* we just don't print them, except at debug
*/
ignore_this_time = errs & E_SUM_LINK_PKTERRS;
}
} else if ((errs & E_SUM_LINK_PKTERRS) &&
!(ppd->lflags & QIBL_LINKACTIVE)) {
/*
* This can happen when SMA is trying to bring the link
* up, but the IB link changes state at the "wrong" time.
* The IB logic then complains that the packet isn't
* valid. We don't want to confuse people, so we just
* don't print them, except at debug
*/
ignore_this_time = errs & E_SUM_LINK_PKTERRS;
}
qib_write_kreg(dd, kr_errclear, errs);
errs &= ~ignore_this_time;
if (!errs)
goto done;
/*
* The ones we mask off are handled specially below
* or above. Also mask SDMADISABLED by default as it
* is too chatty.
*/
mask = ERR_MASK(IBStatusChanged) |
ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr) |
ERR_MASK(HardwareErr) | ERR_MASK(SDmaDisabledErr);
qib_decode_7220_err(dd, msg, sizeof(dd->cspec->emsgbuf), errs & ~mask);
if (errs & E_SUM_PKTERRS)
qib_stats.sps_rcverrs++;
if (errs & E_SUM_ERRS)
qib_stats.sps_txerrs++;
iserr = errs & ~(E_SUM_PKTERRS | QLOGIC_IB_E_PKTERRS |
ERR_MASK(SDmaDisabledErr));
if (errs & ERR_MASK(IBStatusChanged)) {
u64 ibcs;
ibcs = qib_read_kreg64(dd, kr_ibcstatus);
if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
handle_7220_chase(ppd, ibcs);
/* Update our picture of width and speed from chip */
ppd->link_width_active =
((ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1) ?
IB_WIDTH_4X : IB_WIDTH_1X;
ppd->link_speed_active =
((ibcs >> IBA7220_LINKSPEED_SHIFT) & 1) ?
QIB_IB_DDR : QIB_IB_SDR;
/*
* Since going into a recovery state causes the link state
* to go down and since recovery is transitory, it is better
* if we "miss" ever seeing the link training state go into
* recovery (i.e., ignore this transition for link state
* special handling purposes) without updating lastibcstat.
*/
if (qib_7220_phys_portstate(ibcs) !=
IB_PHYSPORTSTATE_LINK_ERR_RECOVER)
qib_handle_e_ibstatuschanged(ppd, ibcs);
}
if (errs & ERR_MASK(ResetNegated)) {
qib_dev_err(dd,
"Got reset, requires re-init (unload and reload driver)\n");
dd->flags &= ~QIB_INITTED; /* needs re-init */
/* mark as having had error */
*dd->devstatusp |= QIB_STATUS_HWERROR;
*dd->pport->statusp &= ~QIB_STATUS_IB_CONF;
}
if (*msg && iserr)
qib_dev_porterr(dd, ppd->port, "%s error\n", msg);
if (ppd->state_wanted & ppd->lflags)
wake_up_interruptible(&ppd->state_wait);
/*
* If there were hdrq or egrfull errors, wake up any processes
* waiting in poll. We used to try to check which contexts had
* the overflow, but given the cost of that and the chip reads
* to support it, it's better to just wake everybody up if we
* get an overflow; waiters can poll again if it's not them.
*/
if (errs & (ERR_MASK(RcvEgrFullErr) | ERR_MASK(RcvHdrFullErr))) {
qib_handle_urcv(dd, ~0U);
if (errs & ERR_MASK(RcvEgrFullErr))
qib_stats.sps_buffull++;
else
qib_stats.sps_hdrfull++;
}
done:
return;
}
/* enable/disable chip from delivering interrupts */
static void qib_7220_set_intr_state(struct qib_devdata *dd, u32 enable)
{
if (enable) {
if (dd->flags & QIB_BADINTR)
return;
qib_write_kreg(dd, kr_intmask, ~0ULL);
/* force re-interrupt of any pending interrupts. */
qib_write_kreg(dd, kr_intclear, 0ULL);
} else
qib_write_kreg(dd, kr_intmask, 0ULL);
}
/*
* Try to cleanup as much as possible for anything that might have gone
* wrong while in freeze mode, such as pio buffers being written by user
* processes (causing armlaunch), send errors due to going into freeze mode,
* etc., and try to avoid causing extra interrupts while doing so.
* Forcibly update the in-memory pioavail register copies after cleanup
* because the chip won't do it while in freeze mode (the register values
* themselves are kept correct).
* Make sure that we don't lose any important interrupts by using the chip
* feature that says that writing 0 to a bit in *clear that is set in
* *status will cause an interrupt to be generated again (if allowed by
* the *mask value).
* This is in chip-specific code because of all of the register accesses,
* even though the details are similar on most chips.
*/
static void qib_7220_clear_freeze(struct qib_devdata *dd)
{
/* disable error interrupts, to avoid confusion */
qib_write_kreg(dd, kr_errmask, 0ULL);
/* also disable interrupts; errormask is sometimes overwriten */
qib_7220_set_intr_state(dd, 0);
qib_cancel_sends(dd->pport);
/* clear the freeze, and be sure chip saw it */
qib_write_kreg(dd, kr_control, dd->control);
qib_read_kreg32(dd, kr_scratch);
/* force in-memory update now we are out of freeze */
qib_force_pio_avail_update(dd);
/*
* force new interrupt if any hwerr, error or interrupt bits are
* still set, and clear "safe" send packet errors related to freeze
* and cancelling sends. Re-enable error interrupts before possible
* force of re-interrupt on pending interrupts.
*/
qib_write_kreg(dd, kr_hwerrclear, 0ULL);
qib_write_kreg(dd, kr_errclear, E_SPKT_ERRS_IGNORE);
qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
qib_7220_set_intr_state(dd, 1);
}
/**
* qib_7220_handle_hwerrors - display hardware errors.
* @dd: the qlogic_ib device
* @msg: the output buffer
* @msgl: the size of the output buffer
*
* Use same msg buffer as regular errors to avoid excessive stack
* use. Most hardware errors are catastrophic, but for right now,
* we'll print them and continue. We reuse the same message buffer as
* handle_7220_errors() to avoid excessive stack usage.
*/
static void qib_7220_handle_hwerrors(struct qib_devdata *dd, char *msg,
size_t msgl)
{
u64 hwerrs;
u32 bits, ctrl;
int isfatal = 0;
char *bitsmsg;
int log_idx;
hwerrs = qib_read_kreg64(dd, kr_hwerrstatus);
if (!hwerrs)
goto bail;
if (hwerrs == ~0ULL) {
qib_dev_err(dd,
"Read of hardware error status failed (all bits set); ignoring\n");
goto bail;
}
qib_stats.sps_hwerrs++;
/*
* Always clear the error status register, except MEMBISTFAIL,
* regardless of whether we continue or stop using the chip.
* We want that set so we know it failed, even across driver reload.
* We'll still ignore it in the hwerrmask. We do this partly for
* diagnostics, but also for support.
*/
qib_write_kreg(dd, kr_hwerrclear,
hwerrs & ~HWE_MASK(PowerOnBISTFailed));
hwerrs &= dd->cspec->hwerrmask;
/* We log some errors to EEPROM, check if we have any of those. */
for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
if (hwerrs & dd->eep_st_masks[log_idx].hwerrs_to_log)
qib_inc_eeprom_err(dd, log_idx, 1);
if (hwerrs & ~(TXEMEMPARITYERR_PIOBUF | TXEMEMPARITYERR_PIOPBC |
RXE_PARITY))
qib_devinfo(dd->pcidev,
"Hardware error: hwerr=0x%llx (cleared)\n",
(unsigned long long) hwerrs);
if (hwerrs & ~IB_HWE_BITSEXTANT)
qib_dev_err(dd,
"hwerror interrupt with unknown errors %llx set\n",
(unsigned long long) (hwerrs & ~IB_HWE_BITSEXTANT));
if (hwerrs & QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR)
qib_sd7220_clr_ibpar(dd);
ctrl = qib_read_kreg32(dd, kr_control);
if ((ctrl & QLOGIC_IB_C_FREEZEMODE) && !dd->diag_client) {
/*
* Parity errors in send memory are recoverable by h/w
* just do housekeeping, exit freeze mode and continue.
*/
if (hwerrs & (TXEMEMPARITYERR_PIOBUF |
TXEMEMPARITYERR_PIOPBC)) {
qib_7220_txe_recover(dd);
hwerrs &= ~(TXEMEMPARITYERR_PIOBUF |
TXEMEMPARITYERR_PIOPBC);
}
if (hwerrs)
isfatal = 1;
else
qib_7220_clear_freeze(dd);
}
*msg = '\0';
if (hwerrs & HWE_MASK(PowerOnBISTFailed)) {
isfatal = 1;
strlcat(msg,
"[Memory BIST test failed, InfiniPath hardware unusable]",
msgl);
/* ignore from now on, so disable until driver reloaded */
dd->cspec->hwerrmask &= ~HWE_MASK(PowerOnBISTFailed);
qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
}
qib_format_hwerrors(hwerrs, qib_7220_hwerror_msgs,
ARRAY_SIZE(qib_7220_hwerror_msgs), msg, msgl);
bitsmsg = dd->cspec->bitsmsgbuf;
if (hwerrs & (QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK <<
QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT)) {
bits = (u32) ((hwerrs >>
QLOGIC_IB_HWE_PCIEMEMPARITYERR_SHIFT) &
QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK);
snprintf(bitsmsg, sizeof(dd->cspec->bitsmsgbuf),
"[PCIe Mem Parity Errs %x] ", bits);
strlcat(msg, bitsmsg, msgl);
}
#define _QIB_PLL_FAIL (QLOGIC_IB_HWE_COREPLL_FBSLIP | \
QLOGIC_IB_HWE_COREPLL_RFSLIP)
if (hwerrs & _QIB_PLL_FAIL) {
isfatal = 1;
snprintf(bitsmsg, sizeof(dd->cspec->bitsmsgbuf),
"[PLL failed (%llx), InfiniPath hardware unusable]",
(unsigned long long) hwerrs & _QIB_PLL_FAIL);
strlcat(msg, bitsmsg, msgl);
/* ignore from now on, so disable until driver reloaded */
dd->cspec->hwerrmask &= ~(hwerrs & _QIB_PLL_FAIL);
qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
}
if (hwerrs & QLOGIC_IB_HWE_SERDESPLLFAILED) {
/*
* If it occurs, it is left masked since the eternal
* interface is unused.
*/
dd->cspec->hwerrmask &= ~QLOGIC_IB_HWE_SERDESPLLFAILED;
qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
}
qib_dev_err(dd, "%s hardware error\n", msg);
if (isfatal && !dd->diag_client) {
qib_dev_err(dd,
"Fatal Hardware Error, no longer usable, SN %.16s\n",
dd->serial);
/*
* For /sys status file and user programs to print; if no
* trailing brace is copied, we'll know it was truncated.
*/
if (dd->freezemsg)
snprintf(dd->freezemsg, dd->freezelen,
"{%s}", msg);
qib_disable_after_error(dd);
}
bail:;
}
/**
* qib_7220_init_hwerrors - enable hardware errors
* @dd: the qlogic_ib device
*
* now that we have finished initializing everything that might reasonably
* cause a hardware error, and cleared those errors bits as they occur,
* we can enable hardware errors in the mask (potentially enabling
* freeze mode), and enable hardware errors as errors (along with
* everything else) in errormask
*/
static void qib_7220_init_hwerrors(struct qib_devdata *dd)
{
u64 val;
u64 extsval;
extsval = qib_read_kreg64(dd, kr_extstatus);
if (!(extsval & (QLOGIC_IB_EXTS_MEMBIST_ENDTEST |
QLOGIC_IB_EXTS_MEMBIST_DISABLED)))
qib_dev_err(dd, "MemBIST did not complete!\n");
if (extsval & QLOGIC_IB_EXTS_MEMBIST_DISABLED)
qib_devinfo(dd->pcidev, "MemBIST is disabled.\n");
val = ~0ULL; /* default to all hwerrors become interrupts, */
val &= ~QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR;
dd->cspec->hwerrmask = val;
qib_write_kreg(dd, kr_hwerrclear, ~HWE_MASK(PowerOnBISTFailed));
qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
/* clear all */
qib_write_kreg(dd, kr_errclear, ~0ULL);
/* enable errors that are masked, at least this first time. */
qib_write_kreg(dd, kr_errmask, ~0ULL);
dd->cspec->errormask = qib_read_kreg64(dd, kr_errmask);
/* clear any interrupts up to this point (ints still not enabled) */
qib_write_kreg(dd, kr_intclear, ~0ULL);
}
/*
* Disable and enable the armlaunch error. Used for PIO bandwidth testing
* on chips that are count-based, rather than trigger-based. There is no
* reference counting, but that's also fine, given the intended use.
* Only chip-specific because it's all register accesses
*/
static void qib_set_7220_armlaunch(struct qib_devdata *dd, u32 enable)
{
if (enable) {
qib_write_kreg(dd, kr_errclear, ERR_MASK(SendPioArmLaunchErr));
dd->cspec->errormask |= ERR_MASK(SendPioArmLaunchErr);
} else
dd->cspec->errormask &= ~ERR_MASK(SendPioArmLaunchErr);
qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
}
/*
* Formerly took parameter <which> in pre-shifted,
* pre-merged form with LinkCmd and LinkInitCmd
* together, and assuming the zero was NOP.
*/
static void qib_set_ib_7220_lstate(struct qib_pportdata *ppd, u16 linkcmd,
u16 linitcmd)
{
u64 mod_wd;
struct qib_devdata *dd = ppd->dd;
unsigned long flags;
if (linitcmd == QLOGIC_IB_IBCC_LINKINITCMD_DISABLE) {
/*
* If we are told to disable, note that so link-recovery
* code does not attempt to bring us back up.
*/
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags |= QIBL_IB_LINK_DISABLED;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
} else if (linitcmd || linkcmd == QLOGIC_IB_IBCC_LINKCMD_DOWN) {
/*
* Any other linkinitcmd will lead to LINKDOWN and then
* to INIT (if all is well), so clear flag to let
* link-recovery code attempt to bring us back up.
*/
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~QIBL_IB_LINK_DISABLED;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
}
mod_wd = (linkcmd << IBA7220_IBCC_LINKCMD_SHIFT) |
(linitcmd << QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl | mod_wd);
/* write to chip to prevent back-to-back writes of ibc reg */
qib_write_kreg(dd, kr_scratch, 0);
}
/*
* All detailed interaction with the SerDes has been moved to qib_sd7220.c
*
* The portion of IBA7220-specific bringup_serdes() that actually deals with
* registers and memory within the SerDes itself is qib_sd7220_init().
*/
/**
* qib_7220_bringup_serdes - bring up the serdes
* @ppd: physical port on the qlogic_ib device
*/
static int qib_7220_bringup_serdes(struct qib_pportdata *ppd)
{
struct qib_devdata *dd = ppd->dd;
u64 val, prev_val, guid, ibc;
int ret = 0;
/* Put IBC in reset, sends disabled */
dd->control &= ~QLOGIC_IB_C_LINKENABLE;
qib_write_kreg(dd, kr_control, 0ULL);
if (qib_compat_ddr_negotiate) {
ppd->cpspec->ibdeltainprog = 1;
ppd->cpspec->ibsymsnap = read_7220_creg32(dd, cr_ibsymbolerr);
ppd->cpspec->iblnkerrsnap =
read_7220_creg32(dd, cr_iblinkerrrecov);
}
/* flowcontrolwatermark is in units of KBytes */
ibc = 0x5ULL << SYM_LSB(IBCCtrl, FlowCtrlWaterMark);
/*
* How often flowctrl sent. More or less in usecs; balance against
* watermark value, so that in theory senders always get a flow
* control update in time to not let the IB link go idle.
*/
ibc |= 0x3ULL << SYM_LSB(IBCCtrl, FlowCtrlPeriod);
/* max error tolerance */
ibc |= 0xfULL << SYM_LSB(IBCCtrl, PhyerrThreshold);
/* use "real" buffer space for */
ibc |= 4ULL << SYM_LSB(IBCCtrl, CreditScale);
/* IB credit flow control. */
ibc |= 0xfULL << SYM_LSB(IBCCtrl, OverrunThreshold);
/*
* set initial max size pkt IBC will send, including ICRC; it's the
* PIO buffer size in dwords, less 1; also see qib_set_mtu()
*/
ibc |= ((u64)(ppd->ibmaxlen >> 2) + 1) << SYM_LSB(IBCCtrl, MaxPktLen);
ppd->cpspec->ibcctrl = ibc; /* without linkcmd or linkinitcmd! */
/* initially come up waiting for TS1, without sending anything. */
val = ppd->cpspec->ibcctrl | (QLOGIC_IB_IBCC_LINKINITCMD_DISABLE <<
QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
qib_write_kreg(dd, kr_ibcctrl, val);
if (!ppd->cpspec->ibcddrctrl) {
/* not on re-init after reset */
ppd->cpspec->ibcddrctrl = qib_read_kreg64(dd, kr_ibcddrctrl);
if (ppd->link_speed_enabled == (QIB_IB_SDR | QIB_IB_DDR))
ppd->cpspec->ibcddrctrl |=
IBA7220_IBC_SPEED_AUTONEG_MASK |
IBA7220_IBC_IBTA_1_2_MASK;
else
ppd->cpspec->ibcddrctrl |=
ppd->link_speed_enabled == QIB_IB_DDR ?
IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
if ((ppd->link_width_enabled & (IB_WIDTH_1X | IB_WIDTH_4X)) ==
(IB_WIDTH_1X | IB_WIDTH_4X))
ppd->cpspec->ibcddrctrl |= IBA7220_IBC_WIDTH_AUTONEG;
else
ppd->cpspec->ibcddrctrl |=
ppd->link_width_enabled == IB_WIDTH_4X ?
IBA7220_IBC_WIDTH_4X_ONLY :
IBA7220_IBC_WIDTH_1X_ONLY;
/* always enable these on driver reload, not sticky */
ppd->cpspec->ibcddrctrl |=
IBA7220_IBC_RXPOL_MASK << IBA7220_IBC_RXPOL_SHIFT;
ppd->cpspec->ibcddrctrl |=
IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
/* enable automatic lane reversal detection for receive */
ppd->cpspec->ibcddrctrl |= IBA7220_IBC_LANE_REV_SUPPORTED;
} else
/* write to chip to prevent back-to-back writes of ibc reg */
qib_write_kreg(dd, kr_scratch, 0);
qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
qib_write_kreg(dd, kr_scratch, 0);
qib_write_kreg(dd, kr_ncmodectrl, 0Ull);
qib_write_kreg(dd, kr_scratch, 0);
ret = qib_sd7220_init(dd);
val = qib_read_kreg64(dd, kr_xgxs_cfg);
prev_val = val;
val |= QLOGIC_IB_XGXS_FC_SAFE;
if (val != prev_val) {
qib_write_kreg(dd, kr_xgxs_cfg, val);
qib_read_kreg32(dd, kr_scratch);
}
if (val & QLOGIC_IB_XGXS_RESET)
val &= ~QLOGIC_IB_XGXS_RESET;
if (val != prev_val)
qib_write_kreg(dd, kr_xgxs_cfg, val);
/* first time through, set port guid */
if (!ppd->guid)
ppd->guid = dd->base_guid;
guid = be64_to_cpu(ppd->guid);
qib_write_kreg(dd, kr_hrtbt_guid, guid);
if (!ret) {
dd->control |= QLOGIC_IB_C_LINKENABLE;
qib_write_kreg(dd, kr_control, dd->control);
} else
/* write to chip to prevent back-to-back writes of ibc reg */
qib_write_kreg(dd, kr_scratch, 0);
return ret;
}
/**
* qib_7220_quiet_serdes - set serdes to txidle
* @ppd: physical port of the qlogic_ib device
* Called when driver is being unloaded
*/
static void qib_7220_quiet_serdes(struct qib_pportdata *ppd)
{
u64 val;
struct qib_devdata *dd = ppd->dd;
unsigned long flags;
/* disable IBC */
dd->control &= ~QLOGIC_IB_C_LINKENABLE;
qib_write_kreg(dd, kr_control,
dd->control | QLOGIC_IB_C_FREEZEMODE);
ppd->cpspec->chase_end = 0;
if (ppd->cpspec->chase_timer.data) /* if initted */
del_timer_sync(&ppd->cpspec->chase_timer);
if (ppd->cpspec->ibsymdelta || ppd->cpspec->iblnkerrdelta ||
ppd->cpspec->ibdeltainprog) {
u64 diagc;
/* enable counter writes */
diagc = qib_read_kreg64(dd, kr_hwdiagctrl);
qib_write_kreg(dd, kr_hwdiagctrl,
diagc | SYM_MASK(HwDiagCtrl, CounterWrEnable));
if (ppd->cpspec->ibsymdelta || ppd->cpspec->ibdeltainprog) {
val = read_7220_creg32(dd, cr_ibsymbolerr);
if (ppd->cpspec->ibdeltainprog)
val -= val - ppd->cpspec->ibsymsnap;
val -= ppd->cpspec->ibsymdelta;
write_7220_creg(dd, cr_ibsymbolerr, val);
}
if (ppd->cpspec->iblnkerrdelta || ppd->cpspec->ibdeltainprog) {
val = read_7220_creg32(dd, cr_iblinkerrrecov);
if (ppd->cpspec->ibdeltainprog)
val -= val - ppd->cpspec->iblnkerrsnap;
val -= ppd->cpspec->iblnkerrdelta;
write_7220_creg(dd, cr_iblinkerrrecov, val);
}
/* and disable counter writes */
qib_write_kreg(dd, kr_hwdiagctrl, diagc);
}
qib_set_ib_7220_lstate(ppd, 0, QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
wake_up(&ppd->cpspec->autoneg_wait);
cancel_delayed_work_sync(&ppd->cpspec->autoneg_work);
shutdown_7220_relock_poll(ppd->dd);
val = qib_read_kreg64(ppd->dd, kr_xgxs_cfg);
val |= QLOGIC_IB_XGXS_RESET;
qib_write_kreg(ppd->dd, kr_xgxs_cfg, val);
}
/**
* qib_setup_7220_setextled - set the state of the two external LEDs
* @dd: the qlogic_ib device
* @on: whether the link is up or not
*
* The exact combo of LEDs if on is true is determined by looking
* at the ibcstatus.
*
* These LEDs indicate the physical and logical state of IB link.
* For this chip (at least with recommended board pinouts), LED1
* is Yellow (logical state) and LED2 is Green (physical state),
*
* Note: We try to match the Mellanox HCA LED behavior as best
* we can. Green indicates physical link state is OK (something is
* plugged in, and we can train).
* Amber indicates the link is logically up (ACTIVE).
* Mellanox further blinks the amber LED to indicate data packet
* activity, but we have no hardware support for that, so it would
* require waking up every 10-20 msecs and checking the counters
* on the chip, and then turning the LED off if appropriate. That's
* visible overhead, so not something we will do.
*
*/
static void qib_setup_7220_setextled(struct qib_pportdata *ppd, u32 on)
{
struct qib_devdata *dd = ppd->dd;
u64 extctl, ledblink = 0, val, lst, ltst;
unsigned long flags;
/*
* The diags use the LED to indicate diag info, so we leave
* the external LED alone when the diags are running.
*/
if (dd->diag_client)
return;
if (ppd->led_override) {
ltst = (ppd->led_override & QIB_LED_PHYS) ?
IB_PHYSPORTSTATE_LINKUP : IB_PHYSPORTSTATE_DISABLED,
lst = (ppd->led_override & QIB_LED_LOG) ?
IB_PORT_ACTIVE : IB_PORT_DOWN;
} else if (on) {
val = qib_read_kreg64(dd, kr_ibcstatus);
ltst = qib_7220_phys_portstate(val);
lst = qib_7220_iblink_state(val);
} else {
ltst = 0;
lst = 0;
}
spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
extctl = dd->cspec->extctrl & ~(SYM_MASK(EXTCtrl, LEDPriPortGreenOn) |
SYM_MASK(EXTCtrl, LEDPriPortYellowOn));
if (ltst == IB_PHYSPORTSTATE_LINKUP) {
extctl |= SYM_MASK(EXTCtrl, LEDPriPortGreenOn);
/*
* counts are in chip clock (4ns) periods.
* This is 1/16 sec (66.6ms) on,
* 3/16 sec (187.5 ms) off, with packets rcvd
*/
ledblink = ((66600 * 1000UL / 4) << IBA7220_LEDBLINK_ON_SHIFT)
| ((187500 * 1000UL / 4) << IBA7220_LEDBLINK_OFF_SHIFT);
}
if (lst == IB_PORT_ACTIVE)
extctl |= SYM_MASK(EXTCtrl, LEDPriPortYellowOn);
dd->cspec->extctrl = extctl;
qib_write_kreg(dd, kr_extctrl, extctl);
spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
if (ledblink) /* blink the LED on packet receive */
qib_write_kreg(dd, kr_rcvpktledcnt, ledblink);
}
static void qib_7220_free_irq(struct qib_devdata *dd)
{
if (dd->cspec->irq) {
free_irq(dd->cspec->irq, dd);
dd->cspec->irq = 0;
}
qib_nomsi(dd);
}
/*
* qib_setup_7220_cleanup - clean up any per-chip chip-specific stuff
* @dd: the qlogic_ib device
*
* This is called during driver unload.
*
*/
static void qib_setup_7220_cleanup(struct qib_devdata *dd)
{
qib_7220_free_irq(dd);
kfree(dd->cspec->cntrs);
kfree(dd->cspec->portcntrs);
}
/*
* This is only called for SDmaInt.
* SDmaDisabled is handled on the error path.
*/
static void sdma_7220_intr(struct qib_pportdata *ppd, u64 istat)
{
unsigned long flags;
spin_lock_irqsave(&ppd->sdma_lock, flags);
switch (ppd->sdma_state.current_state) {
case qib_sdma_state_s00_hw_down:
break;
case qib_sdma_state_s10_hw_start_up_wait:
__qib_sdma_process_event(ppd, qib_sdma_event_e20_hw_started);
break;
case qib_sdma_state_s20_idle:
break;
case qib_sdma_state_s30_sw_clean_up_wait:
break;
case qib_sdma_state_s40_hw_clean_up_wait:
break;
case qib_sdma_state_s50_hw_halt_wait:
__qib_sdma_process_event(ppd, qib_sdma_event_e60_hw_halted);
break;
case qib_sdma_state_s99_running:
/* too chatty to print here */
__qib_sdma_intr(ppd);
break;
}
spin_unlock_irqrestore(&ppd->sdma_lock, flags);
}
static void qib_wantpiobuf_7220_intr(struct qib_devdata *dd, u32 needint)
{
unsigned long flags;
spin_lock_irqsave(&dd->sendctrl_lock, flags);
if (needint) {
if (!(dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
goto done;
/*
* blip the availupd off, next write will be on, so
* we ensure an avail update, regardless of threshold or
* buffers becoming free, whenever we want an interrupt
*/
qib_write_kreg(dd, kr_sendctrl, dd->sendctrl &
~SYM_MASK(SendCtrl, SendBufAvailUpd));
qib_write_kreg(dd, kr_scratch, 0ULL);
dd->sendctrl |= SYM_MASK(SendCtrl, SendIntBufAvail);
} else
dd->sendctrl &= ~SYM_MASK(SendCtrl, SendIntBufAvail);
qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
qib_write_kreg(dd, kr_scratch, 0ULL);
done:
spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
}
/*
* Handle errors and unusual events first, separate function
* to improve cache hits for fast path interrupt handling.
*/
static noinline void unlikely_7220_intr(struct qib_devdata *dd, u64 istat)
{
if (unlikely(istat & ~QLOGIC_IB_I_BITSEXTANT))
qib_dev_err(dd,
"interrupt with unknown interrupts %Lx set\n",
istat & ~QLOGIC_IB_I_BITSEXTANT);
if (istat & QLOGIC_IB_I_GPIO) {
u32 gpiostatus;
/*
* Boards for this chip currently don't use GPIO interrupts,
* so clear by writing GPIOstatus to GPIOclear, and complain
* to alert developer. To avoid endless repeats, clear
* the bits in the mask, since there is some kind of
* programming error or chip problem.
*/
gpiostatus = qib_read_kreg32(dd, kr_gpio_status);
/*
* In theory, writing GPIOstatus to GPIOclear could
* have a bad side-effect on some diagnostic that wanted
* to poll for a status-change, but the various shadows
* make that problematic at best. Diags will just suppress
* all GPIO interrupts during such tests.
*/
qib_write_kreg(dd, kr_gpio_clear, gpiostatus);
if (gpiostatus) {
const u32 mask = qib_read_kreg32(dd, kr_gpio_mask);
u32 gpio_irq = mask & gpiostatus;
/*
* A bit set in status and (chip) Mask register
* would cause an interrupt. Since we are not
* expecting any, report it. Also check that the
* chip reflects our shadow, report issues,
* and refresh from the shadow.
*/
/*
* Clear any troublemakers, and update chip
* from shadow
*/
dd->cspec->gpio_mask &= ~gpio_irq;
qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
}
}
if (istat & QLOGIC_IB_I_ERROR) {
u64 estat;
qib_stats.sps_errints++;
estat = qib_read_kreg64(dd, kr_errstatus);
if (!estat)
qib_devinfo(dd->pcidev,
"error interrupt (%Lx), but no error bits set!\n",
istat);
else
handle_7220_errors(dd, estat);
}
}
static irqreturn_t qib_7220intr(int irq, void *data)
{
struct qib_devdata *dd = data;
irqreturn_t ret;
u64 istat;
u64 ctxtrbits;
u64 rmask;
unsigned i;
if ((dd->flags & (QIB_PRESENT | QIB_BADINTR)) != QIB_PRESENT) {
/*
* This return value is not great, but we do not want the
* interrupt core code to remove our interrupt handler
* because we don't appear to be handling an interrupt
* during a chip reset.
*/
ret = IRQ_HANDLED;
goto bail;
}
istat = qib_read_kreg64(dd, kr_intstatus);
if (unlikely(!istat)) {
ret = IRQ_NONE; /* not our interrupt, or already handled */
goto bail;
}
if (unlikely(istat == -1)) {
qib_bad_intrstatus(dd);
/* don't know if it was our interrupt or not */
ret = IRQ_NONE;
goto bail;
}
this_cpu_inc(*dd->int_counter);
if (unlikely(istat & (~QLOGIC_IB_I_BITSEXTANT |
QLOGIC_IB_I_GPIO | QLOGIC_IB_I_ERROR)))
unlikely_7220_intr(dd, istat);
/*
* Clear the interrupt bits we found set, relatively early, so we
* "know" know the chip will have seen this by the time we process
* the queue, and will re-interrupt if necessary. The processor
* itself won't take the interrupt again until we return.
*/
qib_write_kreg(dd, kr_intclear, istat);
/*
* Handle kernel receive queues before checking for pio buffers
* available since receives can overflow; piobuf waiters can afford
* a few extra cycles, since they were waiting anyway.
*/
ctxtrbits = istat &
((QLOGIC_IB_I_RCVAVAIL_MASK << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
(QLOGIC_IB_I_RCVURG_MASK << QLOGIC_IB_I_RCVURG_SHIFT));
if (ctxtrbits) {
rmask = (1ULL << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
(1ULL << QLOGIC_IB_I_RCVURG_SHIFT);
for (i = 0; i < dd->first_user_ctxt; i++) {
if (ctxtrbits & rmask) {
ctxtrbits &= ~rmask;
qib_kreceive(dd->rcd[i], NULL, NULL);
}
rmask <<= 1;
}
if (ctxtrbits) {
ctxtrbits =
(ctxtrbits >> QLOGIC_IB_I_RCVAVAIL_SHIFT) |
(ctxtrbits >> QLOGIC_IB_I_RCVURG_SHIFT);
qib_handle_urcv(dd, ctxtrbits);
}
}
/* only call for SDmaInt */
if (istat & QLOGIC_IB_I_SDMAINT)
sdma_7220_intr(dd->pport, istat);
if ((istat & QLOGIC_IB_I_SPIOBUFAVAIL) && (dd->flags & QIB_INITTED))
qib_ib_piobufavail(dd);
ret = IRQ_HANDLED;
bail:
return ret;
}
/*
* Set up our chip-specific interrupt handler.
* The interrupt type has already been setup, so
* we just need to do the registration and error checking.
* If we are using MSI interrupts, we may fall back to
* INTx later, if the interrupt handler doesn't get called
* within 1/2 second (see verify_interrupt()).
*/
static void qib_setup_7220_interrupt(struct qib_devdata *dd)
{
if (!dd->cspec->irq)
qib_dev_err(dd,
"irq is 0, BIOS error? Interrupts won't work\n");
else {
int ret = request_irq(dd->cspec->irq, qib_7220intr,
dd->msi_lo ? 0 : IRQF_SHARED,
QIB_DRV_NAME, dd);
if (ret)
qib_dev_err(dd,
"Couldn't setup %s interrupt (irq=%d): %d\n",
dd->msi_lo ? "MSI" : "INTx",
dd->cspec->irq, ret);
}
}
/**
* qib_7220_boardname - fill in the board name
* @dd: the qlogic_ib device
*
* info is based on the board revision register
*/
static void qib_7220_boardname(struct qib_devdata *dd)
{
char *n;
u32 boardid, namelen;
boardid = SYM_FIELD(dd->revision, Revision,
BoardID);
switch (boardid) {
case 1:
n = "InfiniPath_QLE7240";
break;
case 2:
n = "InfiniPath_QLE7280";
break;
default:
qib_dev_err(dd, "Unknown 7220 board with ID %u\n", boardid);
n = "Unknown_InfiniPath_7220";
break;
}
namelen = strlen(n) + 1;
dd->boardname = kmalloc(namelen, GFP_KERNEL);
if (!dd->boardname)
qib_dev_err(dd, "Failed allocation for board name: %s\n", n);
else
snprintf(dd->boardname, namelen, "%s", n);
if (dd->majrev != 5 || !dd->minrev || dd->minrev > 2)
qib_dev_err(dd,
"Unsupported InfiniPath hardware revision %u.%u!\n",
dd->majrev, dd->minrev);
snprintf(dd->boardversion, sizeof(dd->boardversion),
"ChipABI %u.%u, %s, InfiniPath%u %u.%u, SW Compat %u\n",
QIB_CHIP_VERS_MAJ, QIB_CHIP_VERS_MIN, dd->boardname,
(unsigned)SYM_FIELD(dd->revision, Revision_R, Arch),
dd->majrev, dd->minrev,
(unsigned)SYM_FIELD(dd->revision, Revision_R, SW));
}
/*
* This routine sleeps, so it can only be called from user context, not
* from interrupt context.
*/
static int qib_setup_7220_reset(struct qib_devdata *dd)
{
u64 val;
int i;
int ret;
u16 cmdval;
u8 int_line, clinesz;
unsigned long flags;
qib_pcie_getcmd(dd, &cmdval, &int_line, &clinesz);
/* Use dev_err so it shows up in logs, etc. */
qib_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->unit);
/* no interrupts till re-initted */
qib_7220_set_intr_state(dd, 0);
dd->pport->cpspec->ibdeltainprog = 0;
dd->pport->cpspec->ibsymdelta = 0;
dd->pport->cpspec->iblnkerrdelta = 0;
/*
* Keep chip from being accessed until we are ready. Use
* writeq() directly, to allow the write even though QIB_PRESENT
* isn't set.
*/
dd->flags &= ~(QIB_INITTED | QIB_PRESENT);
/* so we check interrupts work again */
dd->z_int_counter = qib_int_counter(dd);
val = dd->control | QLOGIC_IB_C_RESET;
writeq(val, &dd->kregbase[kr_control]);
mb(); /* prevent compiler reordering around actual reset */
for (i = 1; i <= 5; i++) {
/*
* Allow MBIST, etc. to complete; longer on each retry.
* We sometimes get machine checks from bus timeout if no
* response, so for now, make it *really* long.
*/
msleep(1000 + (1 + i) * 2000);
qib_pcie_reenable(dd, cmdval, int_line, clinesz);
/*
* Use readq directly, so we don't need to mark it as PRESENT
* until we get a successful indication that all is well.
*/
val = readq(&dd->kregbase[kr_revision]);
if (val == dd->revision) {
dd->flags |= QIB_PRESENT; /* it's back */
ret = qib_reinit_intr(dd);
goto bail;
}
}
ret = 0; /* failed */
bail:
if (ret) {
if (qib_pcie_params(dd, dd->lbus_width, NULL, NULL))
qib_dev_err(dd,
"Reset failed to setup PCIe or interrupts; continuing anyway\n");
/* hold IBC in reset, no sends, etc till later */
qib_write_kreg(dd, kr_control, 0ULL);
/* clear the reset error, init error/hwerror mask */
qib_7220_init_hwerrors(dd);
/* do setup similar to speed or link-width changes */
if (dd->pport->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK)
dd->cspec->presets_needed = 1;
spin_lock_irqsave(&dd->pport->lflags_lock, flags);
dd->pport->lflags |= QIBL_IB_FORCE_NOTIFY;
dd->pport->lflags &= ~QIBL_IB_AUTONEG_FAILED;
spin_unlock_irqrestore(&dd->pport->lflags_lock, flags);
}
return ret;
}
/**
* qib_7220_put_tid - write a TID to the chip
* @dd: the qlogic_ib device
* @tidptr: pointer to the expected TID (in chip) to update
* @tidtype: 0 for eager, 1 for expected
* @pa: physical address of in memory buffer; tidinvalid if freeing
*/
static void qib_7220_put_tid(struct qib_devdata *dd, u64 __iomem *tidptr,
u32 type, unsigned long pa)
{
if (pa != dd->tidinvalid) {
u64 chippa = pa >> IBA7220_TID_PA_SHIFT;
/* paranoia checks */
if (pa != (chippa << IBA7220_TID_PA_SHIFT)) {
qib_dev_err(dd, "Physaddr %lx not 2KB aligned!\n",
pa);
return;
}
if (chippa >= (1UL << IBA7220_TID_SZ_SHIFT)) {
qib_dev_err(dd,
"Physical page address 0x%lx larger than supported\n",
pa);
return;
}
if (type == RCVHQ_RCV_TYPE_EAGER)
chippa |= dd->tidtemplate;
else /* for now, always full 4KB page */
chippa |= IBA7220_TID_SZ_4K;
pa = chippa;
}
writeq(pa, tidptr);
mmiowb();
}
/**
* qib_7220_clear_tids - clear all TID entries for a ctxt, expected and eager
* @dd: the qlogic_ib device
* @ctxt: the ctxt
*
* clear all TID entries for a ctxt, expected and eager.
* Used from qib_close(). On this chip, TIDs are only 32 bits,
* not 64, but they are still on 64 bit boundaries, so tidbase
* is declared as u64 * for the pointer math, even though we write 32 bits
*/
static void qib_7220_clear_tids(struct qib_devdata *dd,
struct qib_ctxtdata *rcd)
{
u64 __iomem *tidbase;
unsigned long tidinv;
u32 ctxt;
int i;
if (!dd->kregbase || !rcd)
return;
ctxt = rcd->ctxt;
tidinv = dd->tidinvalid;
tidbase = (u64 __iomem *)
((char __iomem *)(dd->kregbase) +
dd->rcvtidbase +
ctxt * dd->rcvtidcnt * sizeof(*tidbase));
for (i = 0; i < dd->rcvtidcnt; i++)
qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
tidinv);
tidbase = (u64 __iomem *)
((char __iomem *)(dd->kregbase) +
dd->rcvegrbase +
rcd->rcvegr_tid_base * sizeof(*tidbase));
for (i = 0; i < rcd->rcvegrcnt; i++)
qib_7220_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
tidinv);
}
/**
* qib_7220_tidtemplate - setup constants for TID updates
* @dd: the qlogic_ib device
*
* We setup stuff that we use a lot, to avoid calculating each time
*/
static void qib_7220_tidtemplate(struct qib_devdata *dd)
{
if (dd->rcvegrbufsize == 2048)
dd->tidtemplate = IBA7220_TID_SZ_2K;
else if (dd->rcvegrbufsize == 4096)
dd->tidtemplate = IBA7220_TID_SZ_4K;
dd->tidinvalid = 0;
}
/**
* qib_init_7220_get_base_info - set chip-specific flags for user code
* @rcd: the qlogic_ib ctxt
* @kbase: qib_base_info pointer
*
* We set the PCIE flag because the lower bandwidth on PCIe vs
* HyperTransport can affect some user packet algorithims.
*/
static int qib_7220_get_base_info(struct qib_ctxtdata *rcd,
struct qib_base_info *kinfo)
{
kinfo->spi_runtime_flags |= QIB_RUNTIME_PCIE |
QIB_RUNTIME_NODMA_RTAIL | QIB_RUNTIME_SDMA;
if (rcd->dd->flags & QIB_USE_SPCL_TRIG)
kinfo->spi_runtime_flags |= QIB_RUNTIME_SPECIAL_TRIGGER;
return 0;
}
static struct qib_message_header *
qib_7220_get_msgheader(struct qib_devdata *dd, __le32 *rhf_addr)
{
u32 offset = qib_hdrget_offset(rhf_addr);
return (struct qib_message_header *)
(rhf_addr - dd->rhf_offset + offset);
}
static void qib_7220_config_ctxts(struct qib_devdata *dd)
{
unsigned long flags;
u32 nchipctxts;
nchipctxts = qib_read_kreg32(dd, kr_portcnt);
dd->cspec->numctxts = nchipctxts;
if (qib_n_krcv_queues > 1) {
dd->qpn_mask = 0x3e;
dd->first_user_ctxt = qib_n_krcv_queues * dd->num_pports;
if (dd->first_user_ctxt > nchipctxts)
dd->first_user_ctxt = nchipctxts;
} else
dd->first_user_ctxt = dd->num_pports;
dd->n_krcv_queues = dd->first_user_ctxt;
if (!qib_cfgctxts) {
int nctxts = dd->first_user_ctxt + num_online_cpus();
if (nctxts <= 5)
dd->ctxtcnt = 5;
else if (nctxts <= 9)
dd->ctxtcnt = 9;
else if (nctxts <= nchipctxts)
dd->ctxtcnt = nchipctxts;
} else if (qib_cfgctxts <= nchipctxts)
dd->ctxtcnt = qib_cfgctxts;
if (!dd->ctxtcnt) /* none of the above, set to max */
dd->ctxtcnt = nchipctxts;
/*
* Chip can be configured for 5, 9, or 17 ctxts, and choice
* affects number of eager TIDs per ctxt (1K, 2K, 4K).
* Lock to be paranoid about later motion, etc.
*/
spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
if (dd->ctxtcnt > 9)
dd->rcvctrl |= 2ULL << IBA7220_R_CTXTCFG_SHIFT;
else if (dd->ctxtcnt > 5)
dd->rcvctrl |= 1ULL << IBA7220_R_CTXTCFG_SHIFT;
/* else configure for default 5 receive ctxts */
if (dd->qpn_mask)
dd->rcvctrl |= 1ULL << QIB_7220_RcvCtrl_RcvQPMapEnable_LSB;
qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
/* kr_rcvegrcnt changes based on the number of contexts enabled */
dd->cspec->rcvegrcnt = qib_read_kreg32(dd, kr_rcvegrcnt);
dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt, IBA7220_KRCVEGRCNT);
}
static int qib_7220_get_ib_cfg(struct qib_pportdata *ppd, int which)
{
int lsb, ret = 0;
u64 maskr; /* right-justified mask */
switch (which) {
case QIB_IB_CFG_LWID_ENB: /* Get allowed Link-width */
ret = ppd->link_width_enabled;
goto done;
case QIB_IB_CFG_LWID: /* Get currently active Link-width */
ret = ppd->link_width_active;
goto done;
case QIB_IB_CFG_SPD_ENB: /* Get allowed Link speeds */
ret = ppd->link_speed_enabled;
goto done;
case QIB_IB_CFG_SPD: /* Get current Link spd */
ret = ppd->link_speed_active;
goto done;
case QIB_IB_CFG_RXPOL_ENB: /* Get Auto-RX-polarity enable */
lsb = IBA7220_IBC_RXPOL_SHIFT;
maskr = IBA7220_IBC_RXPOL_MASK;
break;
case QIB_IB_CFG_LREV_ENB: /* Get Auto-Lane-reversal enable */
lsb = IBA7220_IBC_LREV_SHIFT;
maskr = IBA7220_IBC_LREV_MASK;
break;
case QIB_IB_CFG_LINKLATENCY:
ret = qib_read_kreg64(ppd->dd, kr_ibcddrstatus)
& IBA7220_DDRSTAT_LINKLAT_MASK;
goto done;
case QIB_IB_CFG_OP_VLS:
ret = ppd->vls_operational;
goto done;
case QIB_IB_CFG_VL_HIGH_CAP:
ret = 0;
goto done;
case QIB_IB_CFG_VL_LOW_CAP:
ret = 0;
goto done;
case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
OverrunThreshold);
goto done;
case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
ret = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
PhyerrThreshold);
goto done;
case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
/* will only take effect when the link state changes */
ret = (ppd->cpspec->ibcctrl &
SYM_MASK(IBCCtrl, LinkDownDefaultState)) ?
IB_LINKINITCMD_SLEEP : IB_LINKINITCMD_POLL;
goto done;
case QIB_IB_CFG_HRTBT: /* Get Heartbeat off/enable/auto */
lsb = IBA7220_IBC_HRTBT_SHIFT;
maskr = IBA7220_IBC_HRTBT_MASK;
break;
case QIB_IB_CFG_PMA_TICKS:
/*
* 0x00 = 10x link transfer rate or 4 nsec. for 2.5Gbs
* Since the clock is always 250MHz, the value is 1 or 0.
*/
ret = (ppd->link_speed_active == QIB_IB_DDR);
goto done;
default:
ret = -EINVAL;
goto done;
}
ret = (int)((ppd->cpspec->ibcddrctrl >> lsb) & maskr);
done:
return ret;
}
static int qib_7220_set_ib_cfg(struct qib_pportdata *ppd, int which, u32 val)
{
struct qib_devdata *dd = ppd->dd;
u64 maskr; /* right-justified mask */
int lsb, ret = 0, setforce = 0;
u16 lcmd, licmd;
unsigned long flags;
u32 tmp = 0;
switch (which) {
case QIB_IB_CFG_LIDLMC:
/*
* Set LID and LMC. Combined to avoid possible hazard
* caller puts LMC in 16MSbits, DLID in 16LSbits of val
*/
lsb = IBA7220_IBC_DLIDLMC_SHIFT;
maskr = IBA7220_IBC_DLIDLMC_MASK;
break;
case QIB_IB_CFG_LWID_ENB: /* set allowed Link-width */
/*
* As with speed, only write the actual register if
* the link is currently down, otherwise takes effect
* on next link change.
*/
ppd->link_width_enabled = val;
if (!(ppd->lflags & QIBL_LINKDOWN))
goto bail;
/*
* We set the QIBL_IB_FORCE_NOTIFY bit so updown
* will get called because we want update
* link_width_active, and the change may not take
* effect for some time (if we are in POLL), so this
* flag will force the updown routine to be called
* on the next ibstatuschange down interrupt, even
* if it's not an down->up transition.
*/
val--; /* convert from IB to chip */
maskr = IBA7220_IBC_WIDTH_MASK;
lsb = IBA7220_IBC_WIDTH_SHIFT;
setforce = 1;
break;
case QIB_IB_CFG_SPD_ENB: /* set allowed Link speeds */
/*
* If we turn off IB1.2, need to preset SerDes defaults,
* but not right now. Set a flag for the next time
* we command the link down. As with width, only write the
* actual register if the link is currently down, otherwise
* takes effect on next link change. Since setting is being
* explicitly requested (via MAD or sysfs), clear autoneg
* failure status if speed autoneg is enabled.
*/
ppd->link_speed_enabled = val;
if ((ppd->cpspec->ibcddrctrl & IBA7220_IBC_IBTA_1_2_MASK) &&
!(val & (val - 1)))
dd->cspec->presets_needed = 1;
if (!(ppd->lflags & QIBL_LINKDOWN))
goto bail;
/*
* We set the QIBL_IB_FORCE_NOTIFY bit so updown
* will get called because we want update
* link_speed_active, and the change may not take
* effect for some time (if we are in POLL), so this
* flag will force the updown routine to be called
* on the next ibstatuschange down interrupt, even
* if it's not an down->up transition.
*/
if (val == (QIB_IB_SDR | QIB_IB_DDR)) {
val = IBA7220_IBC_SPEED_AUTONEG_MASK |
IBA7220_IBC_IBTA_1_2_MASK;
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
} else
val = val == QIB_IB_DDR ?
IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
maskr = IBA7220_IBC_SPEED_AUTONEG_MASK |
IBA7220_IBC_IBTA_1_2_MASK;
/* IBTA 1.2 mode + speed bits are contiguous */
lsb = SYM_LSB(IBCDDRCtrl, IB_ENHANCED_MODE);
setforce = 1;
break;
case QIB_IB_CFG_RXPOL_ENB: /* set Auto-RX-polarity enable */
lsb = IBA7220_IBC_RXPOL_SHIFT;
maskr = IBA7220_IBC_RXPOL_MASK;
break;
case QIB_IB_CFG_LREV_ENB: /* set Auto-Lane-reversal enable */
lsb = IBA7220_IBC_LREV_SHIFT;
maskr = IBA7220_IBC_LREV_MASK;
break;
case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
OverrunThreshold);
if (maskr != val) {
ppd->cpspec->ibcctrl &=
~SYM_MASK(IBCCtrl, OverrunThreshold);
ppd->cpspec->ibcctrl |= (u64) val <<
SYM_LSB(IBCCtrl, OverrunThreshold);
qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
}
goto bail;
case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
maskr = SYM_FIELD(ppd->cpspec->ibcctrl, IBCCtrl,
PhyerrThreshold);
if (maskr != val) {
ppd->cpspec->ibcctrl &=
~SYM_MASK(IBCCtrl, PhyerrThreshold);
ppd->cpspec->ibcctrl |= (u64) val <<
SYM_LSB(IBCCtrl, PhyerrThreshold);
qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
}
goto bail;
case QIB_IB_CFG_PKEYS: /* update pkeys */
maskr = (u64) ppd->pkeys[0] | ((u64) ppd->pkeys[1] << 16) |
((u64) ppd->pkeys[2] << 32) |
((u64) ppd->pkeys[3] << 48);
qib_write_kreg(dd, kr_partitionkey, maskr);
goto bail;
case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
/* will only take effect when the link state changes */
if (val == IB_LINKINITCMD_POLL)
ppd->cpspec->ibcctrl &=
~SYM_MASK(IBCCtrl, LinkDownDefaultState);
else /* SLEEP */
ppd->cpspec->ibcctrl |=
SYM_MASK(IBCCtrl, LinkDownDefaultState);
qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
goto bail;
case QIB_IB_CFG_MTU: /* update the MTU in IBC */
/*
* Update our housekeeping variables, and set IBC max
* size, same as init code; max IBC is max we allow in
* buffer, less the qword pbc, plus 1 for ICRC, in dwords
* Set even if it's unchanged, print debug message only
* on changes.
*/
val = (ppd->ibmaxlen >> 2) + 1;
ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, MaxPktLen);
ppd->cpspec->ibcctrl |= (u64)val << SYM_LSB(IBCCtrl, MaxPktLen);
qib_write_kreg(dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
goto bail;
case QIB_IB_CFG_LSTATE: /* set the IB link state */
switch (val & 0xffff0000) {
case IB_LINKCMD_DOWN:
lcmd = QLOGIC_IB_IBCC_LINKCMD_DOWN;
if (!ppd->cpspec->ibdeltainprog &&
qib_compat_ddr_negotiate) {
ppd->cpspec->ibdeltainprog = 1;
ppd->cpspec->ibsymsnap =
read_7220_creg32(dd, cr_ibsymbolerr);
ppd->cpspec->iblnkerrsnap =
read_7220_creg32(dd, cr_iblinkerrrecov);
}
break;
case IB_LINKCMD_ARMED:
lcmd = QLOGIC_IB_IBCC_LINKCMD_ARMED;
break;
case IB_LINKCMD_ACTIVE:
lcmd = QLOGIC_IB_IBCC_LINKCMD_ACTIVE;
break;
default:
ret = -EINVAL;
qib_dev_err(dd, "bad linkcmd req 0x%x\n", val >> 16);
goto bail;
}
switch (val & 0xffff) {
case IB_LINKINITCMD_NOP:
licmd = 0;
break;
case IB_LINKINITCMD_POLL:
licmd = QLOGIC_IB_IBCC_LINKINITCMD_POLL;
break;
case IB_LINKINITCMD_SLEEP:
licmd = QLOGIC_IB_IBCC_LINKINITCMD_SLEEP;
break;
case IB_LINKINITCMD_DISABLE:
licmd = QLOGIC_IB_IBCC_LINKINITCMD_DISABLE;
ppd->cpspec->chase_end = 0;
/*
* stop state chase counter and timer, if running.
* wait forpending timer, but don't clear .data (ppd)!
*/
if (ppd->cpspec->chase_timer.expires) {
del_timer_sync(&ppd->cpspec->chase_timer);
ppd->cpspec->chase_timer.expires = 0;
}
break;
default:
ret = -EINVAL;
qib_dev_err(dd, "bad linkinitcmd req 0x%x\n",
val & 0xffff);
goto bail;
}
qib_set_ib_7220_lstate(ppd, lcmd, licmd);
maskr = IBA7220_IBC_WIDTH_MASK;
lsb = IBA7220_IBC_WIDTH_SHIFT;
tmp = (ppd->cpspec->ibcddrctrl >> lsb) & maskr;
/* If the width active on the chip does not match the
* width in the shadow register, write the new active
* width to the chip.
* We don't have to worry about speed as the speed is taken
* care of by set_7220_ibspeed_fast called by ib_updown.
*/
if (ppd->link_width_enabled-1 != tmp) {
ppd->cpspec->ibcddrctrl &= ~(maskr << lsb);
ppd->cpspec->ibcddrctrl |=
(((u64)(ppd->link_width_enabled-1) & maskr) <<
lsb);
qib_write_kreg(dd, kr_ibcddrctrl,
ppd->cpspec->ibcddrctrl);
qib_write_kreg(dd, kr_scratch, 0);
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
}
goto bail;
case QIB_IB_CFG_HRTBT: /* set Heartbeat off/enable/auto */
if (val > IBA7220_IBC_HRTBT_MASK) {
ret = -EINVAL;
goto bail;
}
lsb = IBA7220_IBC_HRTBT_SHIFT;
maskr = IBA7220_IBC_HRTBT_MASK;
break;
default:
ret = -EINVAL;
goto bail;
}
ppd->cpspec->ibcddrctrl &= ~(maskr << lsb);
ppd->cpspec->ibcddrctrl |= (((u64) val & maskr) << lsb);
qib_write_kreg(dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
qib_write_kreg(dd, kr_scratch, 0);
if (setforce) {
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
}
bail:
return ret;
}
static int qib_7220_set_loopback(struct qib_pportdata *ppd, const char *what)
{
int ret = 0;
u64 val, ddr;
if (!strncmp(what, "ibc", 3)) {
ppd->cpspec->ibcctrl |= SYM_MASK(IBCCtrl, Loopback);
val = 0; /* disable heart beat, so link will come up */
qib_devinfo(ppd->dd->pcidev, "Enabling IB%u:%u IBC loopback\n",
ppd->dd->unit, ppd->port);
} else if (!strncmp(what, "off", 3)) {
ppd->cpspec->ibcctrl &= ~SYM_MASK(IBCCtrl, Loopback);
/* enable heart beat again */
val = IBA7220_IBC_HRTBT_MASK << IBA7220_IBC_HRTBT_SHIFT;
qib_devinfo(ppd->dd->pcidev,
"Disabling IB%u:%u IBC loopback (normal)\n",
ppd->dd->unit, ppd->port);
} else
ret = -EINVAL;
if (!ret) {
qib_write_kreg(ppd->dd, kr_ibcctrl, ppd->cpspec->ibcctrl);
ddr = ppd->cpspec->ibcddrctrl & ~(IBA7220_IBC_HRTBT_MASK
<< IBA7220_IBC_HRTBT_SHIFT);
ppd->cpspec->ibcddrctrl = ddr | val;
qib_write_kreg(ppd->dd, kr_ibcddrctrl,
ppd->cpspec->ibcddrctrl);
qib_write_kreg(ppd->dd, kr_scratch, 0);
}
return ret;
}
static void qib_update_7220_usrhead(struct qib_ctxtdata *rcd, u64 hd,
u32 updegr, u32 egrhd, u32 npkts)
{
if (updegr)
qib_write_ureg(rcd->dd, ur_rcvegrindexhead, egrhd, rcd->ctxt);
mmiowb();
qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
mmiowb();
}
static u32 qib_7220_hdrqempty(struct qib_ctxtdata *rcd)
{
u32 head, tail;
head = qib_read_ureg32(rcd->dd, ur_rcvhdrhead, rcd->ctxt);
if (rcd->rcvhdrtail_kvaddr)
tail = qib_get_rcvhdrtail(rcd);
else
tail = qib_read_ureg32(rcd->dd, ur_rcvhdrtail, rcd->ctxt);
return head == tail;
}
/*
* Modify the RCVCTRL register in chip-specific way. This
* is a function because bit positions and (future) register
* location is chip-specifc, but the needed operations are
* generic. <op> is a bit-mask because we often want to
* do multiple modifications.
*/
static void rcvctrl_7220_mod(struct qib_pportdata *ppd, unsigned int op,
int ctxt)
{
struct qib_devdata *dd = ppd->dd;
u64 mask, val;
unsigned long flags;
spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
if (op & QIB_RCVCTRL_TAILUPD_ENB)
dd->rcvctrl |= (1ULL << IBA7220_R_TAILUPD_SHIFT);
if (op & QIB_RCVCTRL_TAILUPD_DIS)
dd->rcvctrl &= ~(1ULL << IBA7220_R_TAILUPD_SHIFT);
if (op & QIB_RCVCTRL_PKEY_ENB)
dd->rcvctrl &= ~(1ULL << IBA7220_R_PKEY_DIS_SHIFT);
if (op & QIB_RCVCTRL_PKEY_DIS)
dd->rcvctrl |= (1ULL << IBA7220_R_PKEY_DIS_SHIFT);
if (ctxt < 0)
mask = (1ULL << dd->ctxtcnt) - 1;
else
mask = (1ULL << ctxt);
if (op & QIB_RCVCTRL_CTXT_ENB) {
/* always done for specific ctxt */
dd->rcvctrl |= (mask << SYM_LSB(RcvCtrl, PortEnable));
if (!(dd->flags & QIB_NODMA_RTAIL))
dd->rcvctrl |= 1ULL << IBA7220_R_TAILUPD_SHIFT;
/* Write these registers before the context is enabled. */
qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt,
dd->rcd[ctxt]->rcvhdrqtailaddr_phys);
qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt,
dd->rcd[ctxt]->rcvhdrq_phys);
dd->rcd[ctxt]->seq_cnt = 1;
}
if (op & QIB_RCVCTRL_CTXT_DIS)
dd->rcvctrl &= ~(mask << SYM_LSB(RcvCtrl, PortEnable));
if (op & QIB_RCVCTRL_INTRAVAIL_ENB)
dd->rcvctrl |= (mask << IBA7220_R_INTRAVAIL_SHIFT);
if (op & QIB_RCVCTRL_INTRAVAIL_DIS)
dd->rcvctrl &= ~(mask << IBA7220_R_INTRAVAIL_SHIFT);
qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
if ((op & QIB_RCVCTRL_INTRAVAIL_ENB) && dd->rhdrhead_intr_off) {
/* arm rcv interrupt */
val = qib_read_ureg32(dd, ur_rcvhdrhead, ctxt) |
dd->rhdrhead_intr_off;
qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
}
if (op & QIB_RCVCTRL_CTXT_ENB) {
/*
* Init the context registers also; if we were
* disabled, tail and head should both be zero
* already from the enable, but since we don't
* know, we have to do it explicitly.
*/
val = qib_read_ureg32(dd, ur_rcvegrindextail, ctxt);
qib_write_ureg(dd, ur_rcvegrindexhead, val, ctxt);
val = qib_read_ureg32(dd, ur_rcvhdrtail, ctxt);
dd->rcd[ctxt]->head = val;
/* If kctxt, interrupt on next receive. */
if (ctxt < dd->first_user_ctxt)
val |= dd->rhdrhead_intr_off;
qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
}
if (op & QIB_RCVCTRL_CTXT_DIS) {
if (ctxt >= 0) {
qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt, 0);
qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt, 0);
} else {
unsigned i;
for (i = 0; i < dd->cfgctxts; i++) {
qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr,
i, 0);
qib_write_kreg_ctxt(dd, kr_rcvhdraddr, i, 0);
}
}
}
spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
}
/*
* Modify the SENDCTRL register in chip-specific way. This
* is a function there may be multiple such registers with
* slightly different layouts. To start, we assume the
* "canonical" register layout of the first chips.
* Chip requires no back-back sendctrl writes, so write
* scratch register after writing sendctrl
*/
static void sendctrl_7220_mod(struct qib_pportdata *ppd, u32 op)
{
struct qib_devdata *dd = ppd->dd;
u64 tmp_dd_sendctrl;
unsigned long flags;
spin_lock_irqsave(&dd->sendctrl_lock, flags);
/* First the ones that are "sticky", saved in shadow */
if (op & QIB_SENDCTRL_CLEAR)
dd->sendctrl = 0;
if (op & QIB_SENDCTRL_SEND_DIS)
dd->sendctrl &= ~SYM_MASK(SendCtrl, SPioEnable);
else if (op & QIB_SENDCTRL_SEND_ENB) {
dd->sendctrl |= SYM_MASK(SendCtrl, SPioEnable);
if (dd->flags & QIB_USE_SPCL_TRIG)
dd->sendctrl |= SYM_MASK(SendCtrl,
SSpecialTriggerEn);
}
if (op & QIB_SENDCTRL_AVAIL_DIS)
dd->sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
else if (op & QIB_SENDCTRL_AVAIL_ENB)
dd->sendctrl |= SYM_MASK(SendCtrl, SendBufAvailUpd);
if (op & QIB_SENDCTRL_DISARM_ALL) {
u32 i, last;
tmp_dd_sendctrl = dd->sendctrl;
/*
* disarm any that are not yet launched, disabling sends
* and updates until done.
*/
last = dd->piobcnt2k + dd->piobcnt4k;
tmp_dd_sendctrl &=
~(SYM_MASK(SendCtrl, SPioEnable) |
SYM_MASK(SendCtrl, SendBufAvailUpd));
for (i = 0; i < last; i++) {
qib_write_kreg(dd, kr_sendctrl,
tmp_dd_sendctrl |
SYM_MASK(SendCtrl, Disarm) | i);
qib_write_kreg(dd, kr_scratch, 0);
}
}
tmp_dd_sendctrl = dd->sendctrl;
if (op & QIB_SENDCTRL_FLUSH)
tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Abort);
if (op & QIB_SENDCTRL_DISARM)
tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Disarm) |
((op & QIB_7220_SendCtrl_DisarmPIOBuf_RMASK) <<
SYM_LSB(SendCtrl, DisarmPIOBuf));
if ((op & QIB_SENDCTRL_AVAIL_BLIP) &&
(dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
tmp_dd_sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
qib_write_kreg(dd, kr_sendctrl, tmp_dd_sendctrl);
qib_write_kreg(dd, kr_scratch, 0);
if (op & QIB_SENDCTRL_AVAIL_BLIP) {
qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
qib_write_kreg(dd, kr_scratch, 0);
}
spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
if (op & QIB_SENDCTRL_FLUSH) {
u32 v;
/*
* ensure writes have hit chip, then do a few
* more reads, to allow DMA of pioavail registers
* to occur, so in-memory copy is in sync with
* the chip. Not always safe to sleep.
*/
v = qib_read_kreg32(dd, kr_scratch);
qib_write_kreg(dd, kr_scratch, v);
v = qib_read_kreg32(dd, kr_scratch);
qib_write_kreg(dd, kr_scratch, v);
qib_read_kreg32(dd, kr_scratch);
}
}
/**
* qib_portcntr_7220 - read a per-port counter
* @dd: the qlogic_ib device
* @creg: the counter to snapshot
*/
static u64 qib_portcntr_7220(struct qib_pportdata *ppd, u32 reg)
{
u64 ret = 0ULL;
struct qib_devdata *dd = ppd->dd;
u16 creg;
/* 0xffff for unimplemented or synthesized counters */
static const u16 xlator[] = {
[QIBPORTCNTR_PKTSEND] = cr_pktsend,
[QIBPORTCNTR_WORDSEND] = cr_wordsend,
[QIBPORTCNTR_PSXMITDATA] = cr_psxmitdatacount,
[QIBPORTCNTR_PSXMITPKTS] = cr_psxmitpktscount,
[QIBPORTCNTR_PSXMITWAIT] = cr_psxmitwaitcount,
[QIBPORTCNTR_SENDSTALL] = cr_sendstall,
[QIBPORTCNTR_PKTRCV] = cr_pktrcv,
[QIBPORTCNTR_PSRCVDATA] = cr_psrcvdatacount,
[QIBPORTCNTR_PSRCVPKTS] = cr_psrcvpktscount,
[QIBPORTCNTR_RCVEBP] = cr_rcvebp,
[QIBPORTCNTR_RCVOVFL] = cr_rcvovfl,
[QIBPORTCNTR_WORDRCV] = cr_wordrcv,
[QIBPORTCNTR_RXDROPPKT] = cr_rxdroppkt,
[QIBPORTCNTR_RXLOCALPHYERR] = cr_rxotherlocalphyerr,
[QIBPORTCNTR_RXVLERR] = cr_rxvlerr,
[QIBPORTCNTR_ERRICRC] = cr_erricrc,
[QIBPORTCNTR_ERRVCRC] = cr_errvcrc,
[QIBPORTCNTR_ERRLPCRC] = cr_errlpcrc,
[QIBPORTCNTR_BADFORMAT] = cr_badformat,
[QIBPORTCNTR_ERR_RLEN] = cr_err_rlen,
[QIBPORTCNTR_IBSYMBOLERR] = cr_ibsymbolerr,
[QIBPORTCNTR_INVALIDRLEN] = cr_invalidrlen,
[QIBPORTCNTR_UNSUPVL] = cr_txunsupvl,
[QIBPORTCNTR_EXCESSBUFOVFL] = cr_excessbufferovfl,
[QIBPORTCNTR_ERRLINK] = cr_errlink,
[QIBPORTCNTR_IBLINKDOWN] = cr_iblinkdown,
[QIBPORTCNTR_IBLINKERRRECOV] = cr_iblinkerrrecov,
[QIBPORTCNTR_LLI] = cr_locallinkintegrityerr,
[QIBPORTCNTR_PSINTERVAL] = cr_psinterval,
[QIBPORTCNTR_PSSTART] = cr_psstart,
[QIBPORTCNTR_PSSTAT] = cr_psstat,
[QIBPORTCNTR_VL15PKTDROP] = cr_vl15droppedpkt,
[QIBPORTCNTR_ERRPKEY] = cr_errpkey,
[QIBPORTCNTR_KHDROVFL] = 0xffff,
};
if (reg >= ARRAY_SIZE(xlator)) {
qib_devinfo(ppd->dd->pcidev,
"Unimplemented portcounter %u\n", reg);
goto done;
}
creg = xlator[reg];
if (reg == QIBPORTCNTR_KHDROVFL) {
int i;
/* sum over all kernel contexts */
for (i = 0; i < dd->first_user_ctxt; i++)
ret += read_7220_creg32(dd, cr_portovfl + i);
}
if (creg == 0xffff)
goto done;
/*
* only fast incrementing counters are 64bit; use 32 bit reads to
* avoid two independent reads when on opteron
*/
if ((creg == cr_wordsend || creg == cr_wordrcv ||
creg == cr_pktsend || creg == cr_pktrcv))
ret = read_7220_creg(dd, creg);
else
ret = read_7220_creg32(dd, creg);
if (creg == cr_ibsymbolerr) {
if (dd->pport->cpspec->ibdeltainprog)
ret -= ret - ppd->cpspec->ibsymsnap;
ret -= dd->pport->cpspec->ibsymdelta;
} else if (creg == cr_iblinkerrrecov) {
if (dd->pport->cpspec->ibdeltainprog)
ret -= ret - ppd->cpspec->iblnkerrsnap;
ret -= dd->pport->cpspec->iblnkerrdelta;
}
done:
return ret;
}
/*
* Device counter names (not port-specific), one line per stat,
* single string. Used by utilities like ipathstats to print the stats
* in a way which works for different versions of drivers, without changing
* the utility. Names need to be 12 chars or less (w/o newline), for proper
* display by utility.
* Non-error counters are first.
* Start of "error" conters is indicated by a leading "E " on the first
* "error" counter, and doesn't count in label length.
* The EgrOvfl list needs to be last so we truncate them at the configured
* context count for the device.
* cntr7220indices contains the corresponding register indices.
*/
static const char cntr7220names[] =
"Interrupts\n"
"HostBusStall\n"
"E RxTIDFull\n"
"RxTIDInvalid\n"
"Ctxt0EgrOvfl\n"
"Ctxt1EgrOvfl\n"
"Ctxt2EgrOvfl\n"
"Ctxt3EgrOvfl\n"
"Ctxt4EgrOvfl\n"
"Ctxt5EgrOvfl\n"
"Ctxt6EgrOvfl\n"
"Ctxt7EgrOvfl\n"
"Ctxt8EgrOvfl\n"
"Ctxt9EgrOvfl\n"
"Ctx10EgrOvfl\n"
"Ctx11EgrOvfl\n"
"Ctx12EgrOvfl\n"
"Ctx13EgrOvfl\n"
"Ctx14EgrOvfl\n"
"Ctx15EgrOvfl\n"
"Ctx16EgrOvfl\n";
static const size_t cntr7220indices[] = {
cr_lbint,
cr_lbflowstall,
cr_errtidfull,
cr_errtidvalid,
cr_portovfl + 0,
cr_portovfl + 1,
cr_portovfl + 2,
cr_portovfl + 3,
cr_portovfl + 4,
cr_portovfl + 5,
cr_portovfl + 6,
cr_portovfl + 7,
cr_portovfl + 8,
cr_portovfl + 9,
cr_portovfl + 10,
cr_portovfl + 11,
cr_portovfl + 12,
cr_portovfl + 13,
cr_portovfl + 14,
cr_portovfl + 15,
cr_portovfl + 16,
};
/*
* same as cntr7220names and cntr7220indices, but for port-specific counters.
* portcntr7220indices is somewhat complicated by some registers needing
* adjustments of various kinds, and those are ORed with _PORT_VIRT_FLAG
*/
static const char portcntr7220names[] =
"TxPkt\n"
"TxFlowPkt\n"
"TxWords\n"
"RxPkt\n"
"RxFlowPkt\n"
"RxWords\n"
"TxFlowStall\n"
"TxDmaDesc\n" /* 7220 and 7322-only */
"E RxDlidFltr\n" /* 7220 and 7322-only */
"IBStatusChng\n"
"IBLinkDown\n"
"IBLnkRecov\n"
"IBRxLinkErr\n"
"IBSymbolErr\n"
"RxLLIErr\n"
"RxBadFormat\n"
"RxBadLen\n"
"RxBufOvrfl\n"
"RxEBP\n"
"RxFlowCtlErr\n"
"RxICRCerr\n"
"RxLPCRCerr\n"
"RxVCRCerr\n"
"RxInvalLen\n"
"RxInvalPKey\n"
"RxPktDropped\n"
"TxBadLength\n"
"TxDropped\n"
"TxInvalLen\n"
"TxUnderrun\n"
"TxUnsupVL\n"
"RxLclPhyErr\n" /* 7220 and 7322-only */
"RxVL15Drop\n" /* 7220 and 7322-only */
"RxVlErr\n" /* 7220 and 7322-only */
"XcessBufOvfl\n" /* 7220 and 7322-only */
;
#define _PORT_VIRT_FLAG 0x8000 /* "virtual", need adjustments */
static const size_t portcntr7220indices[] = {
QIBPORTCNTR_PKTSEND | _PORT_VIRT_FLAG,
cr_pktsendflow,
QIBPORTCNTR_WORDSEND | _PORT_VIRT_FLAG,
QIBPORTCNTR_PKTRCV | _PORT_VIRT_FLAG,
cr_pktrcvflowctrl,
QIBPORTCNTR_WORDRCV | _PORT_VIRT_FLAG,
QIBPORTCNTR_SENDSTALL | _PORT_VIRT_FLAG,
cr_txsdmadesc,
cr_rxdlidfltr,
cr_ibstatuschange,
QIBPORTCNTR_IBLINKDOWN | _PORT_VIRT_FLAG,
QIBPORTCNTR_IBLINKERRRECOV | _PORT_VIRT_FLAG,
QIBPORTCNTR_ERRLINK | _PORT_VIRT_FLAG,
QIBPORTCNTR_IBSYMBOLERR | _PORT_VIRT_FLAG,
QIBPORTCNTR_LLI | _PORT_VIRT_FLAG,
QIBPORTCNTR_BADFORMAT | _PORT_VIRT_FLAG,
QIBPORTCNTR_ERR_RLEN | _PORT_VIRT_FLAG,
QIBPORTCNTR_RCVOVFL | _PORT_VIRT_FLAG,
QIBPORTCNTR_RCVEBP | _PORT_VIRT_FLAG,
cr_rcvflowctrl_err,
QIBPORTCNTR_ERRICRC | _PORT_VIRT_FLAG,
QIBPORTCNTR_ERRLPCRC | _PORT_VIRT_FLAG,
QIBPORTCNTR_ERRVCRC | _PORT_VIRT_FLAG,
QIBPORTCNTR_INVALIDRLEN | _PORT_VIRT_FLAG,
QIBPORTCNTR_ERRPKEY | _PORT_VIRT_FLAG,
QIBPORTCNTR_RXDROPPKT | _PORT_VIRT_FLAG,
cr_invalidslen,
cr_senddropped,
cr_errslen,
cr_sendunderrun,
cr_txunsupvl,
QIBPORTCNTR_RXLOCALPHYERR | _PORT_VIRT_FLAG,
QIBPORTCNTR_VL15PKTDROP | _PORT_VIRT_FLAG,
QIBPORTCNTR_RXVLERR | _PORT_VIRT_FLAG,
QIBPORTCNTR_EXCESSBUFOVFL | _PORT_VIRT_FLAG,
};
/* do all the setup to make the counter reads efficient later */
static void init_7220_cntrnames(struct qib_devdata *dd)
{
int i, j = 0;
char *s;
for (i = 0, s = (char *)cntr7220names; s && j <= dd->cfgctxts;
i++) {
/* we always have at least one counter before the egrovfl */
if (!j && !strncmp("Ctxt0EgrOvfl", s + 1, 12))
j = 1;
s = strchr(s + 1, '\n');
if (s && j)
j++;
}
dd->cspec->ncntrs = i;
if (!s)
/* full list; size is without terminating null */
dd->cspec->cntrnamelen = sizeof(cntr7220names) - 1;
else
dd->cspec->cntrnamelen = 1 + s - cntr7220names;
dd->cspec->cntrs = kmalloc(dd->cspec->ncntrs
* sizeof(u64), GFP_KERNEL);
if (!dd->cspec->cntrs)
qib_dev_err(dd, "Failed allocation for counters\n");
for (i = 0, s = (char *)portcntr7220names; s; i++)
s = strchr(s + 1, '\n');
dd->cspec->nportcntrs = i - 1;
dd->cspec->portcntrnamelen = sizeof(portcntr7220names) - 1;
dd->cspec->portcntrs = kmalloc(dd->cspec->nportcntrs
* sizeof(u64), GFP_KERNEL);
if (!dd->cspec->portcntrs)
qib_dev_err(dd, "Failed allocation for portcounters\n");
}
static u32 qib_read_7220cntrs(struct qib_devdata *dd, loff_t pos, char **namep,
u64 **cntrp)
{
u32 ret;
if (!dd->cspec->cntrs) {
ret = 0;
goto done;
}
if (namep) {
*namep = (char *)cntr7220names;
ret = dd->cspec->cntrnamelen;
if (pos >= ret)
ret = 0; /* final read after getting everything */
} else {
u64 *cntr = dd->cspec->cntrs;
int i;
ret = dd->cspec->ncntrs * sizeof(u64);
if (!cntr || pos >= ret) {
/* everything read, or couldn't get memory */
ret = 0;
goto done;
}
*cntrp = cntr;
for (i = 0; i < dd->cspec->ncntrs; i++)
*cntr++ = read_7220_creg32(dd, cntr7220indices[i]);
}
done:
return ret;
}
static u32 qib_read_7220portcntrs(struct qib_devdata *dd, loff_t pos, u32 port,
char **namep, u64 **cntrp)
{
u32 ret;
if (!dd->cspec->portcntrs) {
ret = 0;
goto done;
}
if (namep) {
*namep = (char *)portcntr7220names;
ret = dd->cspec->portcntrnamelen;
if (pos >= ret)
ret = 0; /* final read after getting everything */
} else {
u64 *cntr = dd->cspec->portcntrs;
struct qib_pportdata *ppd = &dd->pport[port];
int i;
ret = dd->cspec->nportcntrs * sizeof(u64);
if (!cntr || pos >= ret) {
/* everything read, or couldn't get memory */
ret = 0;
goto done;
}
*cntrp = cntr;
for (i = 0; i < dd->cspec->nportcntrs; i++) {
if (portcntr7220indices[i] & _PORT_VIRT_FLAG)
*cntr++ = qib_portcntr_7220(ppd,
portcntr7220indices[i] &
~_PORT_VIRT_FLAG);
else
*cntr++ = read_7220_creg32(dd,
portcntr7220indices[i]);
}
}
done:
return ret;
}
/**
* qib_get_7220_faststats - get word counters from chip before they overflow
* @opaque - contains a pointer to the qlogic_ib device qib_devdata
*
* This needs more work; in particular, decision on whether we really
* need traffic_wds done the way it is
* called from add_timer
*/
static void qib_get_7220_faststats(unsigned long opaque)
{
struct qib_devdata *dd = (struct qib_devdata *) opaque;
struct qib_pportdata *ppd = dd->pport;
unsigned long flags;
u64 traffic_wds;
/*
* don't access the chip while running diags, or memory diags can
* fail
*/
if (!(dd->flags & QIB_INITTED) || dd->diag_client)
/* but re-arm the timer, for diags case; won't hurt other */
goto done;
/*
* We now try to maintain an activity timer, based on traffic
* exceeding a threshold, so we need to check the word-counts
* even if they are 64-bit.
*/
traffic_wds = qib_portcntr_7220(ppd, cr_wordsend) +
qib_portcntr_7220(ppd, cr_wordrcv);
spin_lock_irqsave(&dd->eep_st_lock, flags);
traffic_wds -= dd->traffic_wds;
dd->traffic_wds += traffic_wds;
spin_unlock_irqrestore(&dd->eep_st_lock, flags);
done:
mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
}
/*
* If we are using MSI, try to fallback to INTx.
*/
static int qib_7220_intr_fallback(struct qib_devdata *dd)
{
if (!dd->msi_lo)
return 0;
qib_devinfo(dd->pcidev,
"MSI interrupt not detected, trying INTx interrupts\n");
qib_7220_free_irq(dd);
qib_enable_intx(dd->pcidev);
/*
* Some newer kernels require free_irq before disable_msi,
* and irq can be changed during disable and INTx enable
* and we need to therefore use the pcidev->irq value,
* not our saved MSI value.
*/
dd->cspec->irq = dd->pcidev->irq;
qib_setup_7220_interrupt(dd);
return 1;
}
/*
* Reset the XGXS (between serdes and IBC). Slightly less intrusive
* than resetting the IBC or external link state, and useful in some
* cases to cause some retraining. To do this right, we reset IBC
* as well.
*/
static void qib_7220_xgxs_reset(struct qib_pportdata *ppd)
{
u64 val, prev_val;
struct qib_devdata *dd = ppd->dd;
prev_val = qib_read_kreg64(dd, kr_xgxs_cfg);
val = prev_val | QLOGIC_IB_XGXS_RESET;
prev_val &= ~QLOGIC_IB_XGXS_RESET; /* be sure */
qib_write_kreg(dd, kr_control,
dd->control & ~QLOGIC_IB_C_LINKENABLE);
qib_write_kreg(dd, kr_xgxs_cfg, val);
qib_read_kreg32(dd, kr_scratch);
qib_write_kreg(dd, kr_xgxs_cfg, prev_val);
qib_write_kreg(dd, kr_control, dd->control);
}
/*
* For this chip, we want to use the same buffer every time
* when we are trying to bring the link up (they are always VL15
* packets). At that link state the packet should always go out immediately
* (or at least be discarded at the tx interface if the link is down).
* If it doesn't, and the buffer isn't available, that means some other
* sender has gotten ahead of us, and is preventing our packet from going
* out. In that case, we flush all packets, and try again. If that still
* fails, we fail the request, and hope things work the next time around.
*
* We don't need very complicated heuristics on whether the packet had
* time to go out or not, since even at SDR 1X, it goes out in very short
* time periods, covered by the chip reads done here and as part of the
* flush.
*/
static u32 __iomem *get_7220_link_buf(struct qib_pportdata *ppd, u32 *bnum)
{
u32 __iomem *buf;
u32 lbuf = ppd->dd->cspec->lastbuf_for_pio;
int do_cleanup;
unsigned long flags;
/*
* always blip to get avail list updated, since it's almost
* always needed, and is fairly cheap.
*/
sendctrl_7220_mod(ppd->dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
if (buf)
goto done;
spin_lock_irqsave(&ppd->sdma_lock, flags);
if (ppd->sdma_state.current_state == qib_sdma_state_s20_idle &&
ppd->sdma_state.current_state != qib_sdma_state_s00_hw_down) {
__qib_sdma_process_event(ppd, qib_sdma_event_e00_go_hw_down);
do_cleanup = 0;
} else {
do_cleanup = 1;
qib_7220_sdma_hw_clean_up(ppd);
}
spin_unlock_irqrestore(&ppd->sdma_lock, flags);
if (do_cleanup) {
qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
}
done:
return buf;
}
/*
* This code for non-IBTA-compliant IB speed negotiation is only known to
* work for the SDR to DDR transition, and only between an HCA and a switch
* with recent firmware. It is based on observed heuristics, rather than
* actual knowledge of the non-compliant speed negotiation.
* It has a number of hard-coded fields, since the hope is to rewrite this
* when a spec is available on how the negoation is intended to work.
*/
static void autoneg_7220_sendpkt(struct qib_pportdata *ppd, u32 *hdr,
u32 dcnt, u32 *data)
{
int i;
u64 pbc;
u32 __iomem *piobuf;
u32 pnum;
struct qib_devdata *dd = ppd->dd;
i = 0;
pbc = 7 + dcnt + 1; /* 7 dword header, dword data, icrc */
pbc |= PBC_7220_VL15_SEND;
while (!(piobuf = get_7220_link_buf(ppd, &pnum))) {
if (i++ > 5)
return;
udelay(2);
}
sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_DISARM_BUF(pnum));
writeq(pbc, piobuf);
qib_flush_wc();
qib_pio_copy(piobuf + 2, hdr, 7);
qib_pio_copy(piobuf + 9, data, dcnt);
if (dd->flags & QIB_USE_SPCL_TRIG) {
u32 spcl_off = (pnum >= dd->piobcnt2k) ? 2047 : 1023;
qib_flush_wc();
__raw_writel(0xaebecede, piobuf + spcl_off);
}
qib_flush_wc();
qib_sendbuf_done(dd, pnum);
}
/*
* _start packet gets sent twice at start, _done gets sent twice at end
*/
static void autoneg_7220_send(struct qib_pportdata *ppd, int which)
{
struct qib_devdata *dd = ppd->dd;
static u32 swapped;
u32 dw, i, hcnt, dcnt, *data;
static u32 hdr[7] = { 0xf002ffff, 0x48ffff, 0x6400abba };
static u32 madpayload_start[0x40] = {
0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x1, 0x1388, 0x15e, 0x1, /* rest 0's */
};
static u32 madpayload_done[0x40] = {
0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x40000001, 0x1388, 0x15e, /* rest 0's */
};
dcnt = ARRAY_SIZE(madpayload_start);
hcnt = ARRAY_SIZE(hdr);
if (!swapped) {
/* for maintainability, do it at runtime */
for (i = 0; i < hcnt; i++) {
dw = (__force u32) cpu_to_be32(hdr[i]);
hdr[i] = dw;
}
for (i = 0; i < dcnt; i++) {
dw = (__force u32) cpu_to_be32(madpayload_start[i]);
madpayload_start[i] = dw;
dw = (__force u32) cpu_to_be32(madpayload_done[i]);
madpayload_done[i] = dw;
}
swapped = 1;
}
data = which ? madpayload_done : madpayload_start;
autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
qib_read_kreg64(dd, kr_scratch);
udelay(2);
autoneg_7220_sendpkt(ppd, hdr, dcnt, data);
qib_read_kreg64(dd, kr_scratch);
udelay(2);
}
/*
* Do the absolute minimum to cause an IB speed change, and make it
* ready, but don't actually trigger the change. The caller will
* do that when ready (if link is in Polling training state, it will
* happen immediately, otherwise when link next goes down)
*
* This routine should only be used as part of the DDR autonegotation
* code for devices that are not compliant with IB 1.2 (or code that
* fixes things up for same).
*
* When link has gone down, and autoneg enabled, or autoneg has
* failed and we give up until next time we set both speeds, and
* then we want IBTA enabled as well as "use max enabled speed.
*/
static void set_7220_ibspeed_fast(struct qib_pportdata *ppd, u32 speed)
{
ppd->cpspec->ibcddrctrl &= ~(IBA7220_IBC_SPEED_AUTONEG_MASK |
IBA7220_IBC_IBTA_1_2_MASK);
if (speed == (QIB_IB_SDR | QIB_IB_DDR))
ppd->cpspec->ibcddrctrl |= IBA7220_IBC_SPEED_AUTONEG_MASK |
IBA7220_IBC_IBTA_1_2_MASK;
else
ppd->cpspec->ibcddrctrl |= speed == QIB_IB_DDR ?
IBA7220_IBC_SPEED_DDR : IBA7220_IBC_SPEED_SDR;
qib_write_kreg(ppd->dd, kr_ibcddrctrl, ppd->cpspec->ibcddrctrl);
qib_write_kreg(ppd->dd, kr_scratch, 0);
}
/*
* This routine is only used when we are not talking to another
* IB 1.2-compliant device that we think can do DDR.
* (This includes all existing switch chips as of Oct 2007.)
* 1.2-compliant devices go directly to DDR prior to reaching INIT
*/
static void try_7220_autoneg(struct qib_pportdata *ppd)
{
unsigned long flags;
/*
* Required for older non-IB1.2 DDR switches. Newer
* non-IB-compliant switches don't need it, but so far,
* aren't bothered by it either. "Magic constant"
*/
qib_write_kreg(ppd->dd, kr_ncmodectrl, 0x3b9dc07);
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags |= QIBL_IB_AUTONEG_INPROG;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
autoneg_7220_send(ppd, 0);
set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
toggle_7220_rclkrls(ppd->dd);
/* 2 msec is minimum length of a poll cycle */
queue_delayed_work(ib_wq, &ppd->cpspec->autoneg_work,
msecs_to_jiffies(2));
}
/*
* Handle the empirically determined mechanism for auto-negotiation
* of DDR speed with switches.
*/
static void autoneg_7220_work(struct work_struct *work)
{
struct qib_pportdata *ppd;
struct qib_devdata *dd;
u64 startms;
u32 i;
unsigned long flags;
ppd = &container_of(work, struct qib_chippport_specific,
autoneg_work.work)->pportdata;
dd = ppd->dd;
startms = jiffies_to_msecs(jiffies);
/*
* Busy wait for this first part, it should be at most a
* few hundred usec, since we scheduled ourselves for 2msec.
*/
for (i = 0; i < 25; i++) {
if (SYM_FIELD(ppd->lastibcstat, IBCStatus, LinkTrainingState)
== IB_7220_LT_STATE_POLLQUIET) {
qib_set_linkstate(ppd, QIB_IB_LINKDOWN_DISABLE);
break;
}
udelay(100);
}
if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
goto done; /* we got there early or told to stop */
/* we expect this to timeout */
if (wait_event_timeout(ppd->cpspec->autoneg_wait,
!(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
msecs_to_jiffies(90)))
goto done;
toggle_7220_rclkrls(dd);
/* we expect this to timeout */
if (wait_event_timeout(ppd->cpspec->autoneg_wait,
!(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
msecs_to_jiffies(1700)))
goto done;
set_7220_ibspeed_fast(ppd, QIB_IB_SDR);
toggle_7220_rclkrls(dd);
/*
* Wait up to 250 msec for link to train and get to INIT at DDR;
* this should terminate early.
*/
wait_event_timeout(ppd->cpspec->autoneg_wait,
!(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
msecs_to_jiffies(250));
done:
if (ppd->lflags & QIBL_IB_AUTONEG_INPROG) {
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
if (dd->cspec->autoneg_tries == AUTONEG_TRIES) {
ppd->lflags |= QIBL_IB_AUTONEG_FAILED;
dd->cspec->autoneg_tries = 0;
}
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
}
}
static u32 qib_7220_iblink_state(u64 ibcs)
{
u32 state = (u32)SYM_FIELD(ibcs, IBCStatus, LinkState);
switch (state) {
case IB_7220_L_STATE_INIT:
state = IB_PORT_INIT;
break;
case IB_7220_L_STATE_ARM:
state = IB_PORT_ARMED;
break;
case IB_7220_L_STATE_ACTIVE:
/* fall through */
case IB_7220_L_STATE_ACT_DEFER:
state = IB_PORT_ACTIVE;
break;
default: /* fall through */
case IB_7220_L_STATE_DOWN:
state = IB_PORT_DOWN;
break;
}
return state;
}
/* returns the IBTA port state, rather than the IBC link training state */
static u8 qib_7220_phys_portstate(u64 ibcs)
{
u8 state = (u8)SYM_FIELD(ibcs, IBCStatus, LinkTrainingState);
return qib_7220_physportstate[state];
}
static int qib_7220_ib_updown(struct qib_pportdata *ppd, int ibup, u64 ibcs)
{
int ret = 0, symadj = 0;
struct qib_devdata *dd = ppd->dd;
unsigned long flags;
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~QIBL_IB_FORCE_NOTIFY;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
if (!ibup) {
/*
* When the link goes down we don't want AEQ running, so it
* won't interfere with IBC training, etc., and we need
* to go back to the static SerDes preset values.
*/
if (!(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
QIBL_IB_AUTONEG_INPROG)))
set_7220_ibspeed_fast(ppd, ppd->link_speed_enabled);
if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
qib_sd7220_presets(dd);
qib_cancel_sends(ppd); /* initial disarm, etc. */
spin_lock_irqsave(&ppd->sdma_lock, flags);
if (__qib_sdma_running(ppd))
__qib_sdma_process_event(ppd,
qib_sdma_event_e70_go_idle);
spin_unlock_irqrestore(&ppd->sdma_lock, flags);
}
/* this might better in qib_sd7220_presets() */
set_7220_relock_poll(dd, ibup);
} else {
if (qib_compat_ddr_negotiate &&
!(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
QIBL_IB_AUTONEG_INPROG)) &&
ppd->link_speed_active == QIB_IB_SDR &&
(ppd->link_speed_enabled & (QIB_IB_DDR | QIB_IB_SDR)) ==
(QIB_IB_DDR | QIB_IB_SDR) &&
dd->cspec->autoneg_tries < AUTONEG_TRIES) {
/* we are SDR, and DDR auto-negotiation enabled */
++dd->cspec->autoneg_tries;
if (!ppd->cpspec->ibdeltainprog) {
ppd->cpspec->ibdeltainprog = 1;
ppd->cpspec->ibsymsnap = read_7220_creg32(dd,
cr_ibsymbolerr);
ppd->cpspec->iblnkerrsnap = read_7220_creg32(dd,
cr_iblinkerrrecov);
}
try_7220_autoneg(ppd);
ret = 1; /* no other IB status change processing */
} else if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
ppd->link_speed_active == QIB_IB_SDR) {
autoneg_7220_send(ppd, 1);
set_7220_ibspeed_fast(ppd, QIB_IB_DDR);
udelay(2);
toggle_7220_rclkrls(dd);
ret = 1; /* no other IB status change processing */
} else {
if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
(ppd->link_speed_active & QIB_IB_DDR)) {
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~(QIBL_IB_AUTONEG_INPROG |
QIBL_IB_AUTONEG_FAILED);
spin_unlock_irqrestore(&ppd->lflags_lock,
flags);
dd->cspec->autoneg_tries = 0;
/* re-enable SDR, for next link down */
set_7220_ibspeed_fast(ppd,
ppd->link_speed_enabled);
wake_up(&ppd->cpspec->autoneg_wait);
symadj = 1;
} else if (ppd->lflags & QIBL_IB_AUTONEG_FAILED) {
/*
* Clear autoneg failure flag, and do setup
* so we'll try next time link goes down and
* back to INIT (possibly connected to a
* different device).
*/
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
spin_unlock_irqrestore(&ppd->lflags_lock,
flags);
ppd->cpspec->ibcddrctrl |=
IBA7220_IBC_IBTA_1_2_MASK;
qib_write_kreg(dd, kr_ncmodectrl, 0);
symadj = 1;
}
}
if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
symadj = 1;
if (!ret) {
ppd->delay_mult = rate_to_delay
[(ibcs >> IBA7220_LINKSPEED_SHIFT) & 1]
[(ibcs >> IBA7220_LINKWIDTH_SHIFT) & 1];
set_7220_relock_poll(dd, ibup);
spin_lock_irqsave(&ppd->sdma_lock, flags);
/*
* Unlike 7322, the 7220 needs this, due to lack of
* interrupt in some cases when we have sdma active
* when the link goes down.
*/
if (ppd->sdma_state.current_state !=
qib_sdma_state_s20_idle)
__qib_sdma_process_event(ppd,
qib_sdma_event_e00_go_hw_down);
spin_unlock_irqrestore(&ppd->sdma_lock, flags);
}
}
if (symadj) {
if (ppd->cpspec->ibdeltainprog) {
ppd->cpspec->ibdeltainprog = 0;
ppd->cpspec->ibsymdelta += read_7220_creg32(ppd->dd,
cr_ibsymbolerr) - ppd->cpspec->ibsymsnap;
ppd->cpspec->iblnkerrdelta += read_7220_creg32(ppd->dd,
cr_iblinkerrrecov) - ppd->cpspec->iblnkerrsnap;
}
} else if (!ibup && qib_compat_ddr_negotiate &&
!ppd->cpspec->ibdeltainprog &&
!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
ppd->cpspec->ibdeltainprog = 1;
ppd->cpspec->ibsymsnap = read_7220_creg32(ppd->dd,
cr_ibsymbolerr);
ppd->cpspec->iblnkerrsnap = read_7220_creg32(ppd->dd,
cr_iblinkerrrecov);
}
if (!ret)
qib_setup_7220_setextled(ppd, ibup);
return ret;
}
/*
* Does read/modify/write to appropriate registers to
* set output and direction bits selected by mask.
* these are in their canonical postions (e.g. lsb of
* dir will end up in D48 of extctrl on existing chips).
* returns contents of GP Inputs.
*/
static int gpio_7220_mod(struct qib_devdata *dd, u32 out, u32 dir, u32 mask)
{
u64 read_val, new_out;
unsigned long flags;
if (mask) {
/* some bits being written, lock access to GPIO */
dir &= mask;
out &= mask;
spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
dd->cspec->extctrl &= ~((u64)mask << SYM_LSB(EXTCtrl, GPIOOe));
dd->cspec->extctrl |= ((u64) dir << SYM_LSB(EXTCtrl, GPIOOe));
new_out = (dd->cspec->gpio_out & ~mask) | out;
qib_write_kreg(dd, kr_extctrl, dd->cspec->extctrl);
qib_write_kreg(dd, kr_gpio_out, new_out);
dd->cspec->gpio_out = new_out;
spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
}
/*
* It is unlikely that a read at this time would get valid
* data on a pin whose direction line was set in the same
* call to this function. We include the read here because
* that allows us to potentially combine a change on one pin with
* a read on another, and because the old code did something like
* this.
*/
read_val = qib_read_kreg64(dd, kr_extstatus);
return SYM_FIELD(read_val, EXTStatus, GPIOIn);
}
/*
* Read fundamental info we need to use the chip. These are
* the registers that describe chip capabilities, and are
* saved in shadow registers.
*/
static void get_7220_chip_params(struct qib_devdata *dd)
{
u64 val;
u32 piobufs;
int mtu;
dd->uregbase = qib_read_kreg32(dd, kr_userregbase);
dd->rcvtidcnt = qib_read_kreg32(dd, kr_rcvtidcnt);
dd->rcvtidbase = qib_read_kreg32(dd, kr_rcvtidbase);
dd->rcvegrbase = qib_read_kreg32(dd, kr_rcvegrbase);
dd->palign = qib_read_kreg32(dd, kr_palign);
dd->piobufbase = qib_read_kreg64(dd, kr_sendpiobufbase);
dd->pio2k_bufbase = dd->piobufbase & 0xffffffff;
val = qib_read_kreg64(dd, kr_sendpiosize);
dd->piosize2k = val & ~0U;
dd->piosize4k = val >> 32;
mtu = ib_mtu_enum_to_int(qib_ibmtu);
if (mtu == -1)
mtu = QIB_DEFAULT_MTU;
dd->pport->ibmtu = (u32)mtu;
val = qib_read_kreg64(dd, kr_sendpiobufcnt);
dd->piobcnt2k = val & ~0U;
dd->piobcnt4k = val >> 32;
/* these may be adjusted in init_chip_wc_pat() */
dd->pio2kbase = (u32 __iomem *)
((char __iomem *) dd->kregbase + dd->pio2k_bufbase);
if (dd->piobcnt4k) {
dd->pio4kbase = (u32 __iomem *)
((char __iomem *) dd->kregbase +
(dd->piobufbase >> 32));
/*
* 4K buffers take 2 pages; we use roundup just to be
* paranoid; we calculate it once here, rather than on
* ever buf allocate
*/
dd->align4k = ALIGN(dd->piosize4k, dd->palign);
}
piobufs = dd->piobcnt4k + dd->piobcnt2k;
dd->pioavregs = ALIGN(piobufs, sizeof(u64) * BITS_PER_BYTE / 2) /
(sizeof(u64) * BITS_PER_BYTE / 2);
}
/*
* The chip base addresses in cspec and cpspec have to be set
* after possible init_chip_wc_pat(), rather than in
* qib_get_7220_chip_params(), so split out as separate function
*/
static void set_7220_baseaddrs(struct qib_devdata *dd)
{
u32 cregbase;
/* init after possible re-map in init_chip_wc_pat() */
cregbase = qib_read_kreg32(dd, kr_counterregbase);
dd->cspec->cregbase = (u64 __iomem *)
((char __iomem *) dd->kregbase + cregbase);
dd->egrtidbase = (u64 __iomem *)
((char __iomem *) dd->kregbase + dd->rcvegrbase);
}
#define SENDCTRL_SHADOWED (SYM_MASK(SendCtrl, SendIntBufAvail) | \
SYM_MASK(SendCtrl, SPioEnable) | \
SYM_MASK(SendCtrl, SSpecialTriggerEn) | \
SYM_MASK(SendCtrl, SendBufAvailUpd) | \
SYM_MASK(SendCtrl, AvailUpdThld) | \
SYM_MASK(SendCtrl, SDmaEnable) | \
SYM_MASK(SendCtrl, SDmaIntEnable) | \
SYM_MASK(SendCtrl, SDmaHalt) | \
SYM_MASK(SendCtrl, SDmaSingleDescriptor))
static int sendctrl_hook(struct qib_devdata *dd,
const struct diag_observer *op,
u32 offs, u64 *data, u64 mask, int only_32)
{
unsigned long flags;
unsigned idx = offs / sizeof(u64);
u64 local_data, all_bits;
if (idx != kr_sendctrl) {
qib_dev_err(dd, "SendCtrl Hook called with offs %X, %s-bit\n",
offs, only_32 ? "32" : "64");
return 0;
}
all_bits = ~0ULL;
if (only_32)
all_bits >>= 32;
spin_lock_irqsave(&dd->sendctrl_lock, flags);
if ((mask & all_bits) != all_bits) {
/*
* At least some mask bits are zero, so we need
* to read. The judgement call is whether from
* reg or shadow. First-cut: read reg, and complain
* if any bits which should be shadowed are different
* from their shadowed value.
*/
if (only_32)
local_data = (u64)qib_read_kreg32(dd, idx);
else
local_data = qib_read_kreg64(dd, idx);
qib_dev_err(dd, "Sendctrl -> %X, Shad -> %X\n",
(u32)local_data, (u32)dd->sendctrl);
if ((local_data & SENDCTRL_SHADOWED) !=
(dd->sendctrl & SENDCTRL_SHADOWED))
qib_dev_err(dd, "Sendctrl read: %X shadow is %X\n",
(u32)local_data, (u32) dd->sendctrl);
*data = (local_data & ~mask) | (*data & mask);
}
if (mask) {
/*
* At least some mask bits are one, so we need
* to write, but only shadow some bits.
*/
u64 sval, tval; /* Shadowed, transient */
/*
* New shadow val is bits we don't want to touch,
* ORed with bits we do, that are intended for shadow.
*/
sval = (dd->sendctrl & ~mask);
sval |= *data & SENDCTRL_SHADOWED & mask;
dd->sendctrl = sval;
tval = sval | (*data & ~SENDCTRL_SHADOWED & mask);
qib_dev_err(dd, "Sendctrl <- %X, Shad <- %X\n",
(u32)tval, (u32)sval);
qib_write_kreg(dd, kr_sendctrl, tval);
qib_write_kreg(dd, kr_scratch, 0Ull);
}
spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
return only_32 ? 4 : 8;
}
static const struct diag_observer sendctrl_observer = {
sendctrl_hook, kr_sendctrl * sizeof(u64),
kr_sendctrl * sizeof(u64)
};
/*
* write the final few registers that depend on some of the
* init setup. Done late in init, just before bringing up
* the serdes.
*/
static int qib_late_7220_initreg(struct qib_devdata *dd)
{
int ret = 0;
u64 val;
qib_write_kreg(dd, kr_rcvhdrentsize, dd->rcvhdrentsize);
qib_write_kreg(dd, kr_rcvhdrsize, dd->rcvhdrsize);
qib_write_kreg(dd, kr_rcvhdrcnt, dd->rcvhdrcnt);
qib_write_kreg(dd, kr_sendpioavailaddr, dd->pioavailregs_phys);
val = qib_read_kreg64(dd, kr_sendpioavailaddr);
if (val != dd->pioavailregs_phys) {
qib_dev_err(dd,
"Catastrophic software error, SendPIOAvailAddr written as %lx, read back as %llx\n",
(unsigned long) dd->pioavailregs_phys,
(unsigned long long) val);
ret = -EINVAL;
}
qib_register_observer(dd, &sendctrl_observer);
return ret;
}
static int qib_init_7220_variables(struct qib_devdata *dd)
{
struct qib_chippport_specific *cpspec;
struct qib_pportdata *ppd;
int ret = 0;
u32 sbufs, updthresh;
cpspec = (struct qib_chippport_specific *)(dd + 1);
ppd = &cpspec->pportdata;
dd->pport = ppd;
dd->num_pports = 1;
dd->cspec = (struct qib_chip_specific *)(cpspec + dd->num_pports);
ppd->cpspec = cpspec;
spin_lock_init(&dd->cspec->sdepb_lock);
spin_lock_init(&dd->cspec->rcvmod_lock);
spin_lock_init(&dd->cspec->gpio_lock);
/* we haven't yet set QIB_PRESENT, so use read directly */
dd->revision = readq(&dd->kregbase[kr_revision]);
if ((dd->revision & 0xffffffffU) == 0xffffffffU) {
qib_dev_err(dd,
"Revision register read failure, giving up initialization\n");
ret = -ENODEV;
goto bail;
}
dd->flags |= QIB_PRESENT; /* now register routines work */
dd->majrev = (u8) SYM_FIELD(dd->revision, Revision_R,
ChipRevMajor);
dd->minrev = (u8) SYM_FIELD(dd->revision, Revision_R,
ChipRevMinor);
get_7220_chip_params(dd);
qib_7220_boardname(dd);
/*
* GPIO bits for TWSI data and clock,
* used for serial EEPROM.
*/
dd->gpio_sda_num = _QIB_GPIO_SDA_NUM;
dd->gpio_scl_num = _QIB_GPIO_SCL_NUM;
dd->twsi_eeprom_dev = QIB_TWSI_EEPROM_DEV;
dd->flags |= QIB_HAS_INTX | QIB_HAS_LINK_LATENCY |
QIB_NODMA_RTAIL | QIB_HAS_THRESH_UPDATE;
dd->flags |= qib_special_trigger ?
QIB_USE_SPCL_TRIG : QIB_HAS_SEND_DMA;
/*
* EEPROM error log 0 is TXE Parity errors. 1 is RXE Parity.
* 2 is Some Misc, 3 is reserved for future.
*/
dd->eep_st_masks[0].hwerrs_to_log = HWE_MASK(TXEMemParityErr);
dd->eep_st_masks[1].hwerrs_to_log = HWE_MASK(RXEMemParityErr);
dd->eep_st_masks[2].errs_to_log = ERR_MASK(ResetNegated);
init_waitqueue_head(&cpspec->autoneg_wait);
INIT_DELAYED_WORK(&cpspec->autoneg_work, autoneg_7220_work);
ret = qib_init_pportdata(ppd, dd, 0, 1);
if (ret)
goto bail;
ppd->link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
ppd->link_speed_supported = QIB_IB_SDR | QIB_IB_DDR;
ppd->link_width_enabled = ppd->link_width_supported;
ppd->link_speed_enabled = ppd->link_speed_supported;
/*
* Set the initial values to reasonable default, will be set
* for real when link is up.
*/
ppd->link_width_active = IB_WIDTH_4X;
ppd->link_speed_active = QIB_IB_SDR;
ppd->delay_mult = rate_to_delay[0][1];
ppd->vls_supported = IB_VL_VL0;
ppd->vls_operational = ppd->vls_supported;
if (!qib_mini_init)
qib_write_kreg(dd, kr_rcvbthqp, QIB_KD_QP);
init_timer(&ppd->cpspec->chase_timer);
ppd->cpspec->chase_timer.function = reenable_7220_chase;
ppd->cpspec->chase_timer.data = (unsigned long)ppd;
qib_num_cfg_vls = 1; /* if any 7220's, only one VL */
dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE;
dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE;
dd->rhf_offset =
dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);
/* we always allocate at least 2048 bytes for eager buffers */
ret = ib_mtu_enum_to_int(qib_ibmtu);
dd->rcvegrbufsize = ret != -1 ? max(ret, 2048) : QIB_DEFAULT_MTU;
BUG_ON(!is_power_of_2(dd->rcvegrbufsize));
dd->rcvegrbufsize_shift = ilog2(dd->rcvegrbufsize);
qib_7220_tidtemplate(dd);
/*
* We can request a receive interrupt for 1 or
* more packets from current offset. For now, we set this
* up for a single packet.
*/
dd->rhdrhead_intr_off = 1ULL << 32;
/* setup the stats timer; the add_timer is done at end of init */
init_timer(&dd->stats_timer);
dd->stats_timer.function = qib_get_7220_faststats;
dd->stats_timer.data = (unsigned long) dd;
dd->stats_timer.expires = jiffies + ACTIVITY_TIMER * HZ;
/*
* Control[4] has been added to change the arbitration within
* the SDMA engine between favoring data fetches over descriptor
* fetches. qib_sdma_fetch_arb==0 gives data fetches priority.
*/
if (qib_sdma_fetch_arb)
dd->control |= 1 << 4;
dd->ureg_align = 0x10000; /* 64KB alignment */
dd->piosize2kmax_dwords = (dd->piosize2k >> 2)-1;
qib_7220_config_ctxts(dd);
qib_set_ctxtcnt(dd); /* needed for PAT setup */
if (qib_wc_pat) {
ret = init_chip_wc_pat(dd, 0);
if (ret)
goto bail;
}
set_7220_baseaddrs(dd); /* set chip access pointers now */
ret = 0;
if (qib_mini_init)
goto bail;
ret = qib_create_ctxts(dd);
init_7220_cntrnames(dd);
/* use all of 4KB buffers for the kernel SDMA, zero if !SDMA.
* reserve the update threshold amount for other kernel use, such
* as sending SMI, MAD, and ACKs, or 3, whichever is greater,
* unless we aren't enabling SDMA, in which case we want to use
* all the 4k bufs for the kernel.
* if this was less than the update threshold, we could wait
* a long time for an update. Coded this way because we
* sometimes change the update threshold for various reasons,
* and we want this to remain robust.
*/
updthresh = 8U; /* update threshold */
if (dd->flags & QIB_HAS_SEND_DMA) {
dd->cspec->sdmabufcnt = dd->piobcnt4k;
sbufs = updthresh > 3 ? updthresh : 3;
} else {
dd->cspec->sdmabufcnt = 0;
sbufs = dd->piobcnt4k;
}
dd->cspec->lastbuf_for_pio = dd->piobcnt2k + dd->piobcnt4k -
dd->cspec->sdmabufcnt;
dd->lastctxt_piobuf = dd->cspec->lastbuf_for_pio - sbufs;
dd->cspec->lastbuf_for_pio--; /* range is <= , not < */
dd->last_pio = dd->cspec->lastbuf_for_pio;
dd->pbufsctxt = dd->lastctxt_piobuf /
(dd->cfgctxts - dd->first_user_ctxt);
/*
* if we are at 16 user contexts, we will have one 7 sbufs
* per context, so drop the update threshold to match. We
* want to update before we actually run out, at low pbufs/ctxt
* so give ourselves some margin
*/
if ((dd->pbufsctxt - 2) < updthresh)
updthresh = dd->pbufsctxt - 2;
dd->cspec->updthresh_dflt = updthresh;
dd->cspec->updthresh = updthresh;
/* before full enable, no interrupts, no locking needed */
dd->sendctrl |= (updthresh & SYM_RMASK(SendCtrl, AvailUpdThld))
<< SYM_LSB(SendCtrl, AvailUpdThld);
dd->psxmitwait_supported = 1;
dd->psxmitwait_check_rate = QIB_7220_PSXMITWAIT_CHECK_RATE;
bail:
return ret;
}
static u32 __iomem *qib_7220_getsendbuf(struct qib_pportdata *ppd, u64 pbc,
u32 *pbufnum)
{
u32 first, last, plen = pbc & QIB_PBC_LENGTH_MASK;
struct qib_devdata *dd = ppd->dd;
u32 __iomem *buf;
if (((pbc >> 32) & PBC_7220_VL15_SEND_CTRL) &&
!(ppd->lflags & (QIBL_IB_AUTONEG_INPROG | QIBL_LINKACTIVE)))
buf = get_7220_link_buf(ppd, pbufnum);
else {
if ((plen + 1) > dd->piosize2kmax_dwords)
first = dd->piobcnt2k;
else
first = 0;
/* try 4k if all 2k busy, so same last for both sizes */
last = dd->cspec->lastbuf_for_pio;
buf = qib_getsendbuf_range(dd, pbufnum, first, last);
}
return buf;
}
/* these 2 "counters" are really control registers, and are always RW */
static void qib_set_cntr_7220_sample(struct qib_pportdata *ppd, u32 intv,
u32 start)
{
write_7220_creg(ppd->dd, cr_psinterval, intv);
write_7220_creg(ppd->dd, cr_psstart, start);
}
/*
* NOTE: no real attempt is made to generalize the SDMA stuff.
* At some point "soon" we will have a new more generalized
* set of sdma interface, and then we'll clean this up.
*/
/* Must be called with sdma_lock held, or before init finished */
static void qib_sdma_update_7220_tail(struct qib_pportdata *ppd, u16 tail)
{
/* Commit writes to memory and advance the tail on the chip */
wmb();
ppd->sdma_descq_tail = tail;
qib_write_kreg(ppd->dd, kr_senddmatail, tail);
}
static void qib_sdma_set_7220_desc_cnt(struct qib_pportdata *ppd, unsigned cnt)
{
}
static struct sdma_set_state_action sdma_7220_action_table[] = {
[qib_sdma_state_s00_hw_down] = {
.op_enable = 0,
.op_intenable = 0,
.op_halt = 0,
.go_s99_running_tofalse = 1,
},
[qib_sdma_state_s10_hw_start_up_wait] = {
.op_enable = 1,
.op_intenable = 1,
.op_halt = 1,
},
[qib_sdma_state_s20_idle] = {
.op_enable = 1,
.op_intenable = 1,
.op_halt = 1,
},
[qib_sdma_state_s30_sw_clean_up_wait] = {
.op_enable = 0,
.op_intenable = 1,
.op_halt = 0,
},
[qib_sdma_state_s40_hw_clean_up_wait] = {
.op_enable = 1,
.op_intenable = 1,
.op_halt = 1,
},
[qib_sdma_state_s50_hw_halt_wait] = {
.op_enable = 1,
.op_intenable = 1,
.op_halt = 1,
},
[qib_sdma_state_s99_running] = {
.op_enable = 1,
.op_intenable = 1,
.op_halt = 0,
.go_s99_running_totrue = 1,
},
};
static void qib_7220_sdma_init_early(struct qib_pportdata *ppd)
{
ppd->sdma_state.set_state_action = sdma_7220_action_table;
}
static int init_sdma_7220_regs(struct qib_pportdata *ppd)
{
struct qib_devdata *dd = ppd->dd;
unsigned i, n;
u64 senddmabufmask[3] = { 0 };
/* Set SendDmaBase */
qib_write_kreg(dd, kr_senddmabase, ppd->sdma_descq_phys);
qib_sdma_7220_setlengen(ppd);
qib_sdma_update_7220_tail(ppd, 0); /* Set SendDmaTail */
/* Set SendDmaHeadAddr */
qib_write_kreg(dd, kr_senddmaheadaddr, ppd->sdma_head_phys);
/*
* Reserve all the former "kernel" piobufs, using high number range
* so we get as many 4K buffers as possible
*/
n = dd->piobcnt2k + dd->piobcnt4k;
i = n - dd->cspec->sdmabufcnt;
for (; i < n; ++i) {
unsigned word = i / 64;
unsigned bit = i & 63;
BUG_ON(word >= 3);
senddmabufmask[word] |= 1ULL << bit;
}
qib_write_kreg(dd, kr_senddmabufmask0, senddmabufmask[0]);
qib_write_kreg(dd, kr_senddmabufmask1, senddmabufmask[1]);
qib_write_kreg(dd, kr_senddmabufmask2, senddmabufmask[2]);
ppd->sdma_state.first_sendbuf = i;
ppd->sdma_state.last_sendbuf = n;
return 0;
}
/* sdma_lock must be held */
static u16 qib_sdma_7220_gethead(struct qib_pportdata *ppd)
{
struct qib_devdata *dd = ppd->dd;
int sane;
int use_dmahead;
u16 swhead;
u16 swtail;
u16 cnt;
u16 hwhead;
use_dmahead = __qib_sdma_running(ppd) &&
(dd->flags & QIB_HAS_SDMA_TIMEOUT);
retry:
hwhead = use_dmahead ?
(u16)le64_to_cpu(*ppd->sdma_head_dma) :
(u16)qib_read_kreg32(dd, kr_senddmahead);
swhead = ppd->sdma_descq_head;
swtail = ppd->sdma_descq_tail;
cnt = ppd->sdma_descq_cnt;
if (swhead < swtail) {
/* not wrapped */
sane = (hwhead >= swhead) & (hwhead <= swtail);
} else if (swhead > swtail) {
/* wrapped around */
sane = ((hwhead >= swhead) && (hwhead < cnt)) ||
(hwhead <= swtail);
} else {
/* empty */
sane = (hwhead == swhead);
}
if (unlikely(!sane)) {
if (use_dmahead) {
/* try one more time, directly from the register */
use_dmahead = 0;
goto retry;
}
/* assume no progress */
hwhead = swhead;
}
return hwhead;
}
static int qib_sdma_7220_busy(struct qib_pportdata *ppd)
{
u64 hwstatus = qib_read_kreg64(ppd->dd, kr_senddmastatus);
return (hwstatus & SYM_MASK(SendDmaStatus, ScoreBoardDrainInProg)) ||
(hwstatus & SYM_MASK(SendDmaStatus, AbortInProg)) ||
(hwstatus & SYM_MASK(SendDmaStatus, InternalSDmaEnable)) ||
!(hwstatus & SYM_MASK(SendDmaStatus, ScbEmpty));
}
/*
* Compute the amount of delay before sending the next packet if the
* port's send rate differs from the static rate set for the QP.
* Since the delay affects this packet but the amount of the delay is
* based on the length of the previous packet, use the last delay computed
* and save the delay count for this packet to be used next time
* we get here.
*/
static u32 qib_7220_setpbc_control(struct qib_pportdata *ppd, u32 plen,
u8 srate, u8 vl)
{
u8 snd_mult = ppd->delay_mult;
u8 rcv_mult = ib_rate_to_delay[srate];
u32 ret = ppd->cpspec->last_delay_mult;
ppd->cpspec->last_delay_mult = (rcv_mult > snd_mult) ?
(plen * (rcv_mult - snd_mult) + 1) >> 1 : 0;
/* Indicate VL15, if necessary */
if (vl == 15)
ret |= PBC_7220_VL15_SEND_CTRL;
return ret;
}
static void qib_7220_initvl15_bufs(struct qib_devdata *dd)
{
}
static void qib_7220_init_ctxt(struct qib_ctxtdata *rcd)
{
if (!rcd->ctxt) {
rcd->rcvegrcnt = IBA7220_KRCVEGRCNT;
rcd->rcvegr_tid_base = 0;
} else {
rcd->rcvegrcnt = rcd->dd->cspec->rcvegrcnt;
rcd->rcvegr_tid_base = IBA7220_KRCVEGRCNT +
(rcd->ctxt - 1) * rcd->rcvegrcnt;
}
}
static void qib_7220_txchk_change(struct qib_devdata *dd, u32 start,
u32 len, u32 which, struct qib_ctxtdata *rcd)
{
int i;
unsigned long flags;
switch (which) {
case TXCHK_CHG_TYPE_KERN:
/* see if we need to raise avail update threshold */
spin_lock_irqsave(&dd->uctxt_lock, flags);
for (i = dd->first_user_ctxt;
dd->cspec->updthresh != dd->cspec->updthresh_dflt
&& i < dd->cfgctxts; i++)
if (dd->rcd[i] && dd->rcd[i]->subctxt_cnt &&
((dd->rcd[i]->piocnt / dd->rcd[i]->subctxt_cnt) - 1)
< dd->cspec->updthresh_dflt)
break;
spin_unlock_irqrestore(&dd->uctxt_lock, flags);
if (i == dd->cfgctxts) {
spin_lock_irqsave(&dd->sendctrl_lock, flags);
dd->cspec->updthresh = dd->cspec->updthresh_dflt;
dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
dd->sendctrl |= (dd->cspec->updthresh &
SYM_RMASK(SendCtrl, AvailUpdThld)) <<
SYM_LSB(SendCtrl, AvailUpdThld);
spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
}
break;
case TXCHK_CHG_TYPE_USER:
spin_lock_irqsave(&dd->sendctrl_lock, flags);
if (rcd && rcd->subctxt_cnt && ((rcd->piocnt
/ rcd->subctxt_cnt) - 1) < dd->cspec->updthresh) {
dd->cspec->updthresh = (rcd->piocnt /
rcd->subctxt_cnt) - 1;
dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
dd->sendctrl |= (dd->cspec->updthresh &
SYM_RMASK(SendCtrl, AvailUpdThld))
<< SYM_LSB(SendCtrl, AvailUpdThld);
spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
sendctrl_7220_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
} else
spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
break;
}
}
static void writescratch(struct qib_devdata *dd, u32 val)
{
qib_write_kreg(dd, kr_scratch, val);
}
#define VALID_TS_RD_REG_MASK 0xBF
/**
* qib_7220_tempsense_read - read register of temp sensor via TWSI
* @dd: the qlogic_ib device
* @regnum: register to read from
*
* returns reg contents (0..255) or < 0 for error
*/
static int qib_7220_tempsense_rd(struct qib_devdata *dd, int regnum)
{
int ret;
u8 rdata;
if (regnum > 7) {
ret = -EINVAL;
goto bail;
}
/* return a bogus value for (the one) register we do not have */
if (!((1 << regnum) & VALID_TS_RD_REG_MASK)) {
ret = 0;
goto bail;
}
ret = mutex_lock_interruptible(&dd->eep_lock);
if (ret)
goto bail;
ret = qib_twsi_blk_rd(dd, QIB_TWSI_TEMP_DEV, regnum, &rdata, 1);
if (!ret)
ret = rdata;
mutex_unlock(&dd->eep_lock);
/*
* There are three possibilities here:
* ret is actual value (0..255)
* ret is -ENXIO or -EINVAL from twsi code or this file
* ret is -EINTR from mutex_lock_interruptible.
*/
bail:
return ret;
}
#ifdef CONFIG_INFINIBAND_QIB_DCA
static int qib_7220_notify_dca(struct qib_devdata *dd, unsigned long event)
{
return 0;
}
#endif
/* Dummy function, as 7220 boards never disable EEPROM Write */
static int qib_7220_eeprom_wen(struct qib_devdata *dd, int wen)
{
return 1;
}
/**
* qib_init_iba7220_funcs - set up the chip-specific function pointers
* @dev: the pci_dev for qlogic_ib device
* @ent: pci_device_id struct for this dev
*
* This is global, and is called directly at init to set up the
* chip-specific function pointers for later use.
*/
struct qib_devdata *qib_init_iba7220_funcs(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct qib_devdata *dd;
int ret;
u32 boardid, minwidth;
dd = qib_alloc_devdata(pdev, sizeof(struct qib_chip_specific) +
sizeof(struct qib_chippport_specific));
if (IS_ERR(dd))
goto bail;
dd->f_bringup_serdes = qib_7220_bringup_serdes;
dd->f_cleanup = qib_setup_7220_cleanup;
dd->f_clear_tids = qib_7220_clear_tids;
dd->f_free_irq = qib_7220_free_irq;
dd->f_get_base_info = qib_7220_get_base_info;
dd->f_get_msgheader = qib_7220_get_msgheader;
dd->f_getsendbuf = qib_7220_getsendbuf;
dd->f_gpio_mod = gpio_7220_mod;
dd->f_eeprom_wen = qib_7220_eeprom_wen;
dd->f_hdrqempty = qib_7220_hdrqempty;
dd->f_ib_updown = qib_7220_ib_updown;
dd->f_init_ctxt = qib_7220_init_ctxt;
dd->f_initvl15_bufs = qib_7220_initvl15_bufs;
dd->f_intr_fallback = qib_7220_intr_fallback;
dd->f_late_initreg = qib_late_7220_initreg;
dd->f_setpbc_control = qib_7220_setpbc_control;
dd->f_portcntr = qib_portcntr_7220;
dd->f_put_tid = qib_7220_put_tid;
dd->f_quiet_serdes = qib_7220_quiet_serdes;
dd->f_rcvctrl = rcvctrl_7220_mod;
dd->f_read_cntrs = qib_read_7220cntrs;
dd->f_read_portcntrs = qib_read_7220portcntrs;
dd->f_reset = qib_setup_7220_reset;
dd->f_init_sdma_regs = init_sdma_7220_regs;
dd->f_sdma_busy = qib_sdma_7220_busy;
dd->f_sdma_gethead = qib_sdma_7220_gethead;
dd->f_sdma_sendctrl = qib_7220_sdma_sendctrl;
dd->f_sdma_set_desc_cnt = qib_sdma_set_7220_desc_cnt;
dd->f_sdma_update_tail = qib_sdma_update_7220_tail;
dd->f_sdma_hw_clean_up = qib_7220_sdma_hw_clean_up;
dd->f_sdma_hw_start_up = qib_7220_sdma_hw_start_up;
dd->f_sdma_init_early = qib_7220_sdma_init_early;
dd->f_sendctrl = sendctrl_7220_mod;
dd->f_set_armlaunch = qib_set_7220_armlaunch;
dd->f_set_cntr_sample = qib_set_cntr_7220_sample;
dd->f_iblink_state = qib_7220_iblink_state;
dd->f_ibphys_portstate = qib_7220_phys_portstate;
dd->f_get_ib_cfg = qib_7220_get_ib_cfg;
dd->f_set_ib_cfg = qib_7220_set_ib_cfg;
dd->f_set_ib_loopback = qib_7220_set_loopback;
dd->f_set_intr_state = qib_7220_set_intr_state;
dd->f_setextled = qib_setup_7220_setextled;
dd->f_txchk_change = qib_7220_txchk_change;
dd->f_update_usrhead = qib_update_7220_usrhead;
dd->f_wantpiobuf_intr = qib_wantpiobuf_7220_intr;
dd->f_xgxs_reset = qib_7220_xgxs_reset;
dd->f_writescratch = writescratch;
dd->f_tempsense_rd = qib_7220_tempsense_rd;
#ifdef CONFIG_INFINIBAND_QIB_DCA
dd->f_notify_dca = qib_7220_notify_dca;
#endif
/*
* Do remaining pcie setup and save pcie values in dd.
* Any error printing is already done by the init code.
* On return, we have the chip mapped, but chip registers
* are not set up until start of qib_init_7220_variables.
*/
ret = qib_pcie_ddinit(dd, pdev, ent);
if (ret < 0)
goto bail_free;
/* initialize chip-specific variables */
ret = qib_init_7220_variables(dd);
if (ret)
goto bail_cleanup;
if (qib_mini_init)
goto bail;
boardid = SYM_FIELD(dd->revision, Revision,
BoardID);
switch (boardid) {
case 0:
case 2:
case 10:
case 12:
minwidth = 16; /* x16 capable boards */
break;
default:
minwidth = 8; /* x8 capable boards */
break;
}
if (qib_pcie_params(dd, minwidth, NULL, NULL))
qib_dev_err(dd,
"Failed to setup PCIe or interrupts; continuing anyway\n");
/* save IRQ for possible later use */
dd->cspec->irq = pdev->irq;
if (qib_read_kreg64(dd, kr_hwerrstatus) &
QLOGIC_IB_HWE_SERDESPLLFAILED)
qib_write_kreg(dd, kr_hwerrclear,
QLOGIC_IB_HWE_SERDESPLLFAILED);
/* setup interrupt handler (interrupt type handled above) */
qib_setup_7220_interrupt(dd);
qib_7220_init_hwerrors(dd);
/* clear diagctrl register, in case diags were running and crashed */
qib_write_kreg(dd, kr_hwdiagctrl, 0);
goto bail;
bail_cleanup:
qib_pcie_ddcleanup(dd);
bail_free:
qib_free_devdata(dd);
dd = ERR_PTR(ret);
bail:
return dd;
}