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linux/drivers/infiniband/hw/qib/qib_iba6120.c
Julia Lawall 0f3696eb21 IB/qib: Use GFP_ATOMIC when locks are held 
alloc_dummy_hdrq() is called with locks held and thus should not use
GFP_KERNEL.

The semantic patch that makes this report is available in
scripts/coccinelle/locks/call_kern.cocci.

Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Acked-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2012-01-27 09:59:22 -08:00

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/*
* 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 6120 PCIe chip.
*/
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <rdma/ib_verbs.h>
#include "qib.h"
#include "qib_6120_regs.h"
static void qib_6120_setup_setextled(struct qib_pportdata *, u32);
static void sendctrl_6120_mod(struct qib_pportdata *ppd, u32 op);
static u8 qib_6120_phys_portstate(u64);
static u32 qib_6120_iblink_state(u64);
/*
* This file contains all the chip-specific register information and
* access functions for the QLogic QLogic_IB PCI-Express chip.
*
*/
/* KREG_IDX uses machine-generated #defines */
#define KREG_IDX(regname) (QIB_6120_##regname##_OFFS / sizeof(u64))
/* Use defines to tie machine-generated names to lower-case names */
#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_rcvctrl KREG_IDX(RcvCtrl)
#define kr_sendctrl KREG_IDX(SendCtrl)
#define kr_partitionkey KREG_IDX(RcvPartitionKey)
#define kr_hwdiagctrl KREG_IDX(HwDiagCtrl)
#define kr_ibcstatus KREG_IDX(IBCStatus)
#define kr_ibcctrl KREG_IDX(IBCCtrl)
#define kr_sendbuffererror KREG_IDX(SendBufErr0)
#define kr_rcvbthqp KREG_IDX(RcvBTHQP)
#define kr_counterregbase KREG_IDX(CntrRegBase)
#define kr_palign KREG_IDX(PageAlign)
#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_rcvtidbase KREG_IDX(RcvTIDBase)
#define kr_rcvtidcnt KREG_IDX(RcvTIDCnt)
#define kr_scratch KREG_IDX(Scratch)
#define kr_sendctrl KREG_IDX(SendCtrl)
#define kr_sendpioavailaddr KREG_IDX(SendPIOAvailAddr)
#define kr_sendpiobufbase KREG_IDX(SendPIOBufBase)
#define kr_sendpiobufcnt KREG_IDX(SendPIOBufCnt)
#define kr_sendpiosize KREG_IDX(SendPIOSize)
#define kr_sendregbase KREG_IDX(SendRegBase)
#define kr_userregbase KREG_IDX(UserRegBase)
#define kr_control KREG_IDX(Control)
#define kr_intclear KREG_IDX(IntClear)
#define kr_intmask KREG_IDX(IntMask)
#define kr_intstatus KREG_IDX(IntStatus)
#define kr_errclear KREG_IDX(ErrClear)
#define kr_errmask KREG_IDX(ErrMask)
#define kr_errstatus KREG_IDX(ErrStatus)
#define kr_hwerrclear KREG_IDX(HwErrClear)
#define kr_hwerrmask KREG_IDX(HwErrMask)
#define kr_hwerrstatus KREG_IDX(HwErrStatus)
#define kr_revision KREG_IDX(Revision)
#define kr_portcnt KREG_IDX(PortCnt)
#define kr_serdes_cfg0 KREG_IDX(SerdesCfg0)
#define kr_serdes_cfg1 (kr_serdes_cfg0 + 1)
#define kr_serdes_stat KREG_IDX(SerdesStat)
#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_6120_##regname##_OFFS - \
QIB_6120_LBIntCnt_OFFS) / sizeof(u64))
#define cr_badformat CREG_IDX(RxBadFormatCnt)
#define cr_erricrc CREG_IDX(RxICRCErrCnt)
#define cr_errlink CREG_IDX(RxLinkProblemCnt)
#define cr_errlpcrc CREG_IDX(RxLPCRCErrCnt)
#define cr_errpkey CREG_IDX(RxPKeyMismatchCnt)
#define cr_rcvflowctrl_err CREG_IDX(RxFlowCtrlErrCnt)
#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 SYM_RMASK(regname, fldname) ((u64) \
QIB_6120_##regname##_##fldname##_RMASK)
#define SYM_MASK(regname, fldname) ((u64) \
QIB_6120_##regname##_##fldname##_RMASK << \
QIB_6120_##regname##_##fldname##_LSB)
#define SYM_LSB(regname, fldname) (QIB_6120_##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)
/* link training states, from IBC */
#define IB_6120_LT_STATE_DISABLED 0x00
#define IB_6120_LT_STATE_LINKUP 0x01
#define IB_6120_LT_STATE_POLLACTIVE 0x02
#define IB_6120_LT_STATE_POLLQUIET 0x03
#define IB_6120_LT_STATE_SLEEPDELAY 0x04
#define IB_6120_LT_STATE_SLEEPQUIET 0x05
#define IB_6120_LT_STATE_CFGDEBOUNCE 0x08
#define IB_6120_LT_STATE_CFGRCVFCFG 0x09
#define IB_6120_LT_STATE_CFGWAITRMT 0x0a
#define IB_6120_LT_STATE_CFGIDLE 0x0b
#define IB_6120_LT_STATE_RECOVERRETRAIN 0x0c
#define IB_6120_LT_STATE_RECOVERWAITRMT 0x0e
#define IB_6120_LT_STATE_RECOVERIDLE 0x0f
/* link state machine states from IBC */
#define IB_6120_L_STATE_DOWN 0x0
#define IB_6120_L_STATE_INIT 0x1
#define IB_6120_L_STATE_ARM 0x2
#define IB_6120_L_STATE_ACTIVE 0x3
#define IB_6120_L_STATE_ACT_DEFER 0x4
static const u8 qib_6120_physportstate[0x20] = {
[IB_6120_LT_STATE_DISABLED] = IB_PHYSPORTSTATE_DISABLED,
[IB_6120_LT_STATE_LINKUP] = IB_PHYSPORTSTATE_LINKUP,
[IB_6120_LT_STATE_POLLACTIVE] = IB_PHYSPORTSTATE_POLL,
[IB_6120_LT_STATE_POLLQUIET] = IB_PHYSPORTSTATE_POLL,
[IB_6120_LT_STATE_SLEEPDELAY] = IB_PHYSPORTSTATE_SLEEP,
[IB_6120_LT_STATE_SLEEPQUIET] = IB_PHYSPORTSTATE_SLEEP,
[IB_6120_LT_STATE_CFGDEBOUNCE] =
IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_6120_LT_STATE_CFGRCVFCFG] =
IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_6120_LT_STATE_CFGWAITRMT] =
IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_6120_LT_STATE_CFGIDLE] = IB_PHYSPORTSTATE_CFG_TRAIN,
[IB_6120_LT_STATE_RECOVERRETRAIN] =
IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
[IB_6120_LT_STATE_RECOVERWAITRMT] =
IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
[IB_6120_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
};
struct qib_chip_specific {
u64 __iomem *cregbase;
u64 *cntrs;
u64 *portcntrs;
void *dummy_hdrq; /* used after ctxt close */
dma_addr_t dummy_hdrq_phys;
spinlock_t kernel_tid_lock; /* no back to back kernel TID writes */
spinlock_t user_tid_lock; /* no back to back user TID writes */
spinlock_t rcvmod_lock; /* protect rcvctrl shadow changes */
spinlock_t gpio_lock; /* RMW of shadows/regs for ExtCtrl and GPIO */
u64 hwerrmask;
u64 errormask;
u64 gpio_out; /* shadow of kr_gpio_out, for rmw ops */
u64 gpio_mask; /* shadow the gpio mask register */
u64 extctrl; /* shadow the gpio output enable, etc... */
/*
* these 5 fields are used to establish deltas for IB symbol
* errors and linkrecovery errors. They can be reported on
* some chips during link negotiation prior to INIT, and with
* DDR when faking DDR negotiations with non-IBTA switches.
* The chip counters are adjusted at driver unload if there is
* a non-zero delta.
*/
u64 ibdeltainprog;
u64 ibsymdelta;
u64 ibsymsnap;
u64 iblnkerrdelta;
u64 iblnkerrsnap;
u64 ibcctrl; /* shadow for kr_ibcctrl */
u32 lastlinkrecov; /* link recovery issue */
int irq;
u32 cntrnamelen;
u32 portcntrnamelen;
u32 ncntrs;
u32 nportcntrs;
/* used with gpio interrupts to implement IB counters */
u32 rxfc_unsupvl_errs;
u32 overrun_thresh_errs;
/*
* these count only cases where _successive_ LocalLinkIntegrity
* errors were seen in the receive headers of IB standard packets
*/
u32 lli_errs;
u32 lli_counter;
u64 lli_thresh;
u64 sword; /* total dwords sent (sample result) */
u64 rword; /* total dwords received (sample result) */
u64 spkts; /* total packets sent (sample result) */
u64 rpkts; /* total packets received (sample result) */
u64 xmit_wait; /* # of ticks no data sent (sample result) */
struct timer_list pma_timer;
char emsgbuf[128];
char bitsmsgbuf[64];
u8 pma_sample_status;
};
/* 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 QLOGIC_IB_IBCC_LINKCMD_SHIFT 18
/*
* 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]);
}
static inline u32 qib_read_kreg32(const struct qib_devdata *dd,
const u16 regno)
{
if (!dd->kregbase || !(dd->flags & QIB_PRESENT))
return -1;
return readl((u32 __iomem *)&dd->kregbase[regno]);
}
static inline u64 qib_read_kreg64(const struct qib_devdata *dd,
const u16 regno)
{
if (!dd->kregbase || !(dd->flags & QIB_PRESENT))
return -1;
return readq(&dd->kregbase[regno]);
}
static inline void qib_write_kreg(const struct qib_devdata *dd,
const u16 regno, u64 value)
{
if (dd->kregbase && (dd->flags & QIB_PRESENT))
writeq(value, &dd->kregbase[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_6120_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_6120_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_6120_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_control bits */
#define QLOGIC_IB_C_RESET 1U
/* kr_intstatus, kr_intclear, kr_intmask bits */
#define QLOGIC_IB_I_RCVURG_MASK ((1U << 5) - 1)
#define QLOGIC_IB_I_RCVURG_SHIFT 0
#define QLOGIC_IB_I_RCVAVAIL_MASK ((1U << 5) - 1)
#define QLOGIC_IB_I_RCVAVAIL_SHIFT 12
#define QLOGIC_IB_C_FREEZEMODE 0x00000002
#define QLOGIC_IB_C_LINKENABLE 0x00000004
#define QLOGIC_IB_I_ERROR 0x0000000080000000ULL
#define QLOGIC_IB_I_SPIOSENT 0x0000000040000000ULL
#define QLOGIC_IB_I_SPIOBUFAVAIL 0x0000000020000000ULL
#define QLOGIC_IB_I_GPIO 0x0000000010000000ULL
#define QLOGIC_IB_I_BITSEXTANT \
((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)
/* kr_hwerrclear, kr_hwerrmask, kr_hwerrstatus, bits */
#define QLOGIC_IB_HWE_PCIEMEMPARITYERR_MASK 0x000000000000003fULL
#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
/* 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_FOUND 0x0000000000008000
/* kr_xgxsconfig bits */
#define QLOGIC_IB_XGXS_RESET 0x5ULL
#define _QIB_GPIO_SDA_NUM 1
#define _QIB_GPIO_SCL_NUM 0
/* Bits in GPIO for the added IB link interrupts */
#define GPIO_RXUVL_BIT 3
#define GPIO_OVRUN_BIT 4
#define GPIO_LLI_BIT 5
#define GPIO_ERRINTR_MASK 0x38
#define QLOGIC_IB_RT_BUFSIZE_MASK 0xe0000000ULL
#define QLOGIC_IB_RT_BUFSIZE_SHIFTVAL(tid) \
((((tid) & QLOGIC_IB_RT_BUFSIZE_MASK) >> 29) + 11 - 1)
#define QLOGIC_IB_RT_BUFSIZE(tid) (1 << QLOGIC_IB_RT_BUFSIZE_SHIFTVAL(tid))
#define QLOGIC_IB_RT_IS_VALID(tid) \
(((tid) & QLOGIC_IB_RT_BUFSIZE_MASK) && \
((((tid) & QLOGIC_IB_RT_BUFSIZE_MASK) != QLOGIC_IB_RT_BUFSIZE_MASK)))
#define QLOGIC_IB_RT_ADDR_MASK 0x1FFFFFFFULL /* 29 bits valid */
#define QLOGIC_IB_RT_ADDR_SHIFT 10
#define QLOGIC_IB_R_INTRAVAIL_SHIFT 16
#define QLOGIC_IB_R_TAILUPD_SHIFT 31
#define IBA6120_R_PKEY_DIS_SHIFT 30
#define PBC_6120_VL15_SEND_CTRL (1ULL << 31) /* pbc; VL15; link_buf only */
#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)
/* 6120 specific hardware errors... */
static const struct qib_hwerror_msgs qib_6120_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"),
};
#define TXE_PIO_PARITY (TXEMEMPARITYERR_PIOBUF | TXEMEMPARITYERR_PIOPBC)
#define _QIB_PLL_FAIL (QLOGIC_IB_HWE_COREPLL_FBSLIP | \
QLOGIC_IB_HWE_COREPLL_RFSLIP)
/* variables for sanity checking interrupt and errors */
#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))
#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(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(IBStatusChanged) | \
ERR_MASK(InvalidAddrErr) | ERR_MASK(ResetNegated) | \
ERR_MASK(HardwareErr))
#define QLOGIC_IB_E_PKTERRS ( \
ERR_MASK(SendPktLenErr) | \
ERR_MASK(SendDroppedDataPktErr) | \
ERR_MASK(RcvVCRCErr) | \
ERR_MASK(RcvICRCErr) | \
ERR_MASK(RcvShortPktLenErr) | \
ERR_MASK(RcvEBPErr))
/* 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 qib_6120_put_tid_2(struct qib_devdata *, u64 __iomem *,
u32, unsigned long);
/*
* On platforms using this chip, and not having ordered WC stores, we
* can get TXE parity errors due to speculative reads to the PIO buffers,
* and this, due to a chip issue can result in (many) false parity error
* reports. So it's a debug print on those, and an info print on systems
* where the speculative reads don't occur.
*/
static void qib_6120_txe_recover(struct qib_devdata *dd)
{
if (!qib_unordered_wc())
qib_devinfo(dd->pcidev,
"Recovering from TXE PIO parity error\n");
}
/* enable/disable chip from delivering interrupts */
static void qib_6120_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_6120_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_6120_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_6120_set_intr_state(dd, 1);
}
/**
* qib_handle_6120_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. Reuse the same message buffer as
* handle_6120_errors() to avoid excessive stack usage.
*/
static void qib_handle_6120_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)
return;
if (hwerrs == ~0ULL) {
qib_dev_err(dd, "Read of hardware error status failed "
"(all bits set); ignoring\n");
return;
}
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);
/*
* Make sure we get this much out, unless told to be quiet,
* or it's occurred within the last 5 seconds.
*/
if (hwerrs & ~(TXE_PIO_PARITY | RXEMEMPARITYERR_EAGERTID))
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));
ctrl = qib_read_kreg32(dd, kr_control);
if ((ctrl & QLOGIC_IB_C_FREEZEMODE) && !dd->diag_client) {
/*
* Parity errors in send memory are recoverable,
* just cancel the send (if indicated in * sendbuffererror),
* count the occurrence, unfreeze (if no other handled
* hardware error bits are set), and continue. They can
* occur if a processor speculative read is done to the PIO
* buffer while we are sending a packet, for example.
*/
if (hwerrs & TXE_PIO_PARITY) {
qib_6120_txe_recover(dd);
hwerrs &= ~TXE_PIO_PARITY;
}
if (!hwerrs) {
static u32 freeze_cnt;
freeze_cnt++;
qib_6120_clear_freeze(dd);
} else
isfatal = 1;
}
*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_6120_hwerror_msgs,
ARRAY_SIZE(qib_6120_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);
}
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 external
* interface is unused
*/
dd->cspec->hwerrmask &= ~QLOGIC_IB_HWE_SERDESPLLFAILED;
qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
}
if (hwerrs)
/*
* if any set that we aren't ignoring; only
* make the complaint once, in case it's stuck
* or recurring, and we get here multiple
* times.
*/
qib_dev_err(dd, "%s hardware error\n", msg);
else
*msg = 0; /* recovered from all of them */
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);
}
}
/*
* 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_6120_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(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);
done:
return iserr;
}
/*
* 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.
*/
static void qib_disarm_6120_senderrbufs(struct qib_pportdata *ppd)
{
unsigned long sbuf[2];
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.
*/
sbuf[0] = qib_read_kreg64(dd, kr_sendbuffererror);
sbuf[1] = qib_read_kreg64(dd, kr_sendbuffererror + 1);
if (sbuf[0] || sbuf[1])
qib_disarm_piobufs_set(dd, sbuf,
dd->piobcnt2k + dd->piobcnt4k);
}
static int chk_6120_linkrecovery(struct qib_devdata *dd, u64 ibcs)
{
int ret = 1;
u32 ibstate = qib_6120_iblink_state(ibcs);
u32 linkrecov = read_6120_creg32(dd, cr_iblinkerrrecov);
if (linkrecov != dd->cspec->lastlinkrecov) {
/* and no more until active again */
dd->cspec->lastlinkrecov = 0;
qib_set_linkstate(dd->pport, QIB_IB_LINKDOWN);
ret = 0;
}
if (ibstate == IB_PORT_ACTIVE)
dd->cspec->lastlinkrecov =
read_6120_creg32(dd, cr_iblinkerrrecov);
return ret;
}
static void handle_6120_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_handle_6120_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 & ~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_6120_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.
*/
mask = ERR_MASK(IBStatusChanged) | ERR_MASK(RcvEgrFullErr) |
ERR_MASK(RcvHdrFullErr) | ERR_MASK(HardwareErr);
qib_decode_6120_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);
if (errs & ERR_MASK(IBStatusChanged)) {
u64 ibcs = qib_read_kreg64(dd, kr_ibcstatus);
u32 ibstate = qib_6120_iblink_state(ibcs);
int handle = 1;
if (ibstate != IB_PORT_INIT && dd->cspec->lastlinkrecov)
handle = chk_6120_linkrecovery(dd, ibcs);
/*
* 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 (handle && qib_6120_phys_portstate(ibcs) ==
IB_PHYSPORTSTATE_LINK_ERR_RECOVER)
handle = 0;
if (handle)
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;
}
/**
* qib_6120_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_6120_init_hwerrors(struct qib_devdata *dd)
{
u64 val;
u64 extsval;
extsval = qib_read_kreg64(dd, kr_extstatus);
if (!(extsval & QLOGIC_IB_EXTS_MEMBIST_ENDTEST))
qib_dev_err(dd, "MemBIST did not complete!\n");
/* init so all hwerrors interrupt, and enter freeze, ajdust below */
val = ~0ULL;
if (dd->minrev < 2) {
/*
* Avoid problem with internal interface bus parity
* checking. Fixed in Rev2.
*/
val &= ~QLOGIC_IB_HWE_PCIEBUSPARITYRADM;
}
/* avoid some intel cpu's speculative read freeze mode issue */
val &= ~TXEMEMPARITYERR_PIOBUF;
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);
qib_write_kreg(dd, kr_rcvbthqp,
dd->qpn_mask << (QIB_6120_RcvBTHQP_BTHQP_Mask_LSB - 1) |
QIB_KD_QP);
}
/*
* 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_6120_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_6120_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 << QLOGIC_IB_IBCC_LINKCMD_SHIFT) |
(linitcmd << QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
qib_write_kreg(dd, kr_ibcctrl, dd->cspec->ibcctrl | mod_wd);
/* write to chip to prevent back-to-back writes of control reg */
qib_write_kreg(dd, kr_scratch, 0);
}
/**
* qib_6120_bringup_serdes - bring up the serdes
* @dd: the qlogic_ib device
*/
static int qib_6120_bringup_serdes(struct qib_pportdata *ppd)
{
struct qib_devdata *dd = ppd->dd;
u64 val, config1, prev_val, hwstat, ibc;
/* Put IBC in reset, sends disabled */
dd->control &= ~QLOGIC_IB_C_LINKENABLE;
qib_write_kreg(dd, kr_control, 0ULL);
dd->cspec->ibdeltainprog = 1;
dd->cspec->ibsymsnap = read_6120_creg32(dd, cr_ibsymbolerr);
dd->cspec->iblnkerrsnap = read_6120_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 */
dd->cspec->lli_thresh = 0xf;
ibc |= (u64) dd->cspec->lli_thresh << 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);
dd->cspec->ibcctrl = ibc; /* without linkcmd or linkinitcmd! */
/* initially come up waiting for TS1, without sending anything. */
val = dd->cspec->ibcctrl | (QLOGIC_IB_IBCC_LINKINITCMD_DISABLE <<
QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);
qib_write_kreg(dd, kr_ibcctrl, val);
val = qib_read_kreg64(dd, kr_serdes_cfg0);
config1 = qib_read_kreg64(dd, kr_serdes_cfg1);
/*
* Force reset on, also set rxdetect enable. Must do before reading
* serdesstatus at least for simulation, or some of the bits in
* serdes status will come back as undefined and cause simulation
* failures
*/
val |= SYM_MASK(SerdesCfg0, ResetPLL) |
SYM_MASK(SerdesCfg0, RxDetEnX) |
(SYM_MASK(SerdesCfg0, L1PwrDnA) |
SYM_MASK(SerdesCfg0, L1PwrDnB) |
SYM_MASK(SerdesCfg0, L1PwrDnC) |
SYM_MASK(SerdesCfg0, L1PwrDnD));
qib_write_kreg(dd, kr_serdes_cfg0, val);
/* be sure chip saw it */
qib_read_kreg64(dd, kr_scratch);
udelay(5); /* need pll reset set at least for a bit */
/*
* after PLL is reset, set the per-lane Resets and TxIdle and
* clear the PLL reset and rxdetect (to get falling edge).
* Leave L1PWR bits set (permanently)
*/
val &= ~(SYM_MASK(SerdesCfg0, RxDetEnX) |
SYM_MASK(SerdesCfg0, ResetPLL) |
(SYM_MASK(SerdesCfg0, L1PwrDnA) |
SYM_MASK(SerdesCfg0, L1PwrDnB) |
SYM_MASK(SerdesCfg0, L1PwrDnC) |
SYM_MASK(SerdesCfg0, L1PwrDnD)));
val |= (SYM_MASK(SerdesCfg0, ResetA) |
SYM_MASK(SerdesCfg0, ResetB) |
SYM_MASK(SerdesCfg0, ResetC) |
SYM_MASK(SerdesCfg0, ResetD)) |
SYM_MASK(SerdesCfg0, TxIdeEnX);
qib_write_kreg(dd, kr_serdes_cfg0, val);
/* be sure chip saw it */
(void) qib_read_kreg64(dd, kr_scratch);
/* need PLL reset clear for at least 11 usec before lane
* resets cleared; give it a few more to be sure */
udelay(15);
val &= ~((SYM_MASK(SerdesCfg0, ResetA) |
SYM_MASK(SerdesCfg0, ResetB) |
SYM_MASK(SerdesCfg0, ResetC) |
SYM_MASK(SerdesCfg0, ResetD)) |
SYM_MASK(SerdesCfg0, TxIdeEnX));
qib_write_kreg(dd, kr_serdes_cfg0, val);
/* be sure chip saw it */
(void) qib_read_kreg64(dd, kr_scratch);
val = qib_read_kreg64(dd, kr_xgxs_cfg);
prev_val = val;
if (val & QLOGIC_IB_XGXS_RESET)
val &= ~QLOGIC_IB_XGXS_RESET;
if (SYM_FIELD(val, XGXSCfg, polarity_inv) != ppd->rx_pol_inv) {
/* need to compensate for Tx inversion in partner */
val &= ~SYM_MASK(XGXSCfg, polarity_inv);
val |= (u64)ppd->rx_pol_inv << SYM_LSB(XGXSCfg, polarity_inv);
}
if (val != prev_val)
qib_write_kreg(dd, kr_xgxs_cfg, val);
val = qib_read_kreg64(dd, kr_serdes_cfg0);
/* clear current and de-emphasis bits */
config1 &= ~0x0ffffffff00ULL;
/* set current to 20ma */
config1 |= 0x00000000000ULL;
/* set de-emphasis to -5.68dB */
config1 |= 0x0cccc000000ULL;
qib_write_kreg(dd, kr_serdes_cfg1, config1);
/* base and port guid same for single port */
ppd->guid = dd->base_guid;
/*
* the process of setting and un-resetting the serdes normally
* causes a serdes PLL error, so check for that and clear it
* here. Also clearr hwerr bit in errstatus, but not others.
*/
hwstat = qib_read_kreg64(dd, kr_hwerrstatus);
if (hwstat) {
/* should just have PLL, clear all set, in an case */
qib_write_kreg(dd, kr_hwerrclear, hwstat);
qib_write_kreg(dd, kr_errclear, ERR_MASK(HardwareErr));
}
dd->control |= QLOGIC_IB_C_LINKENABLE;
dd->control &= ~QLOGIC_IB_C_FREEZEMODE;
qib_write_kreg(dd, kr_control, dd->control);
return 0;
}
/**
* qib_6120_quiet_serdes - set serdes to txidle
* @ppd: physical port of the qlogic_ib device
* Called when driver is being unloaded
*/
static void qib_6120_quiet_serdes(struct qib_pportdata *ppd)
{
struct qib_devdata *dd = ppd->dd;
u64 val;
qib_set_ib_6120_lstate(ppd, 0, QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
/* disable IBC */
dd->control &= ~QLOGIC_IB_C_LINKENABLE;
qib_write_kreg(dd, kr_control,
dd->control | QLOGIC_IB_C_FREEZEMODE);
if (dd->cspec->ibsymdelta || dd->cspec->iblnkerrdelta ||
dd->cspec->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 (dd->cspec->ibsymdelta || dd->cspec->ibdeltainprog) {
val = read_6120_creg32(dd, cr_ibsymbolerr);
if (dd->cspec->ibdeltainprog)
val -= val - dd->cspec->ibsymsnap;
val -= dd->cspec->ibsymdelta;
write_6120_creg(dd, cr_ibsymbolerr, val);
}
if (dd->cspec->iblnkerrdelta || dd->cspec->ibdeltainprog) {
val = read_6120_creg32(dd, cr_iblinkerrrecov);
if (dd->cspec->ibdeltainprog)
val -= val - dd->cspec->iblnkerrsnap;
val -= dd->cspec->iblnkerrdelta;
write_6120_creg(dd, cr_iblinkerrrecov, val);
}
/* and disable counter writes */
qib_write_kreg(dd, kr_hwdiagctrl, diagc);
}
val = qib_read_kreg64(dd, kr_serdes_cfg0);
val |= SYM_MASK(SerdesCfg0, TxIdeEnX);
qib_write_kreg(dd, kr_serdes_cfg0, val);
}
/**
* qib_6120_setup_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_6120_setup_setextled(struct qib_pportdata *ppd, u32 on)
{
u64 extctl, val, lst, ltst;
unsigned long flags;
struct qib_devdata *dd = ppd->dd;
/*
* 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;
/* Allow override of LED display for, e.g. Locating system in rack */
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_6120_phys_portstate(val);
lst = qib_6120_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, LEDPriPortYellowOn);
if (lst == IB_PORT_ACTIVE)
extctl |= SYM_MASK(EXTCtrl, LEDPriPortGreenOn);
dd->cspec->extctrl = extctl;
qib_write_kreg(dd, kr_extctrl, extctl);
spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
}
static void qib_6120_free_irq(struct qib_devdata *dd)
{
if (dd->cspec->irq) {
free_irq(dd->cspec->irq, dd);
dd->cspec->irq = 0;
}
qib_nomsi(dd);
}
/**
* qib_6120_setup_cleanup - clean up any per-chip chip-specific stuff
* @dd: the qlogic_ib device
*
* This is called during driver unload.
*/
static void qib_6120_setup_cleanup(struct qib_devdata *dd)
{
qib_6120_free_irq(dd);
kfree(dd->cspec->cntrs);
kfree(dd->cspec->portcntrs);
if (dd->cspec->dummy_hdrq) {
dma_free_coherent(&dd->pcidev->dev,
ALIGN(dd->rcvhdrcnt *
dd->rcvhdrentsize *
sizeof(u32), PAGE_SIZE),
dd->cspec->dummy_hdrq,
dd->cspec->dummy_hdrq_phys);
dd->cspec->dummy_hdrq = NULL;
}
}
static void qib_wantpiobuf_6120_intr(struct qib_devdata *dd, u32 needint)
{
unsigned long flags;
spin_lock_irqsave(&dd->sendctrl_lock, flags);
if (needint)
dd->sendctrl |= SYM_MASK(SendCtrl, PIOIntBufAvail);
else
dd->sendctrl &= ~SYM_MASK(SendCtrl, PIOIntBufAvail);
qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
qib_write_kreg(dd, kr_scratch, 0ULL);
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_6120_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_ERROR) {
u64 estat = 0;
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);
handle_6120_errors(dd, estat);
}
if (istat & QLOGIC_IB_I_GPIO) {
u32 gpiostatus;
u32 to_clear = 0;
/*
* GPIO_3..5 on IBA6120 Rev2 chips indicate
* errors that we need to count.
*/
gpiostatus = qib_read_kreg32(dd, kr_gpio_status);
/* First the error-counter case. */
if (gpiostatus & GPIO_ERRINTR_MASK) {
/* want to clear the bits we see asserted. */
to_clear |= (gpiostatus & GPIO_ERRINTR_MASK);
/*
* Count appropriately, clear bits out of our copy,
* as they have been "handled".
*/
if (gpiostatus & (1 << GPIO_RXUVL_BIT))
dd->cspec->rxfc_unsupvl_errs++;
if (gpiostatus & (1 << GPIO_OVRUN_BIT))
dd->cspec->overrun_thresh_errs++;
if (gpiostatus & (1 << GPIO_LLI_BIT))
dd->cspec->lli_errs++;
gpiostatus &= ~GPIO_ERRINTR_MASK;
}
if (gpiostatus) {
/*
* Some unexpected bits remain. If they could have
* caused the interrupt, complain and clear.
* To avoid repetition of this condition, also clear
* the mask. It is almost certainly due to error.
*/
const u32 mask = qib_read_kreg32(dd, kr_gpio_mask);
/*
* Also check that the chip reflects our shadow,
* and report issues, If they caused the interrupt.
* we will suppress by refreshing from the shadow.
*/
if (mask & gpiostatus) {
to_clear |= (gpiostatus & mask);
dd->cspec->gpio_mask &= ~(gpiostatus & mask);
qib_write_kreg(dd, kr_gpio_mask,
dd->cspec->gpio_mask);
}
}
if (to_clear)
qib_write_kreg(dd, kr_gpio_clear, (u64) to_clear);
}
}
static irqreturn_t qib_6120intr(int irq, void *data)
{
struct qib_devdata *dd = data;
irqreturn_t ret;
u32 istat, ctxtrbits, rmask, crcs = 0;
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_kreg32(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;
}
qib_stats.sps_ints++;
if (dd->int_counter != (u32) -1)
dd->int_counter++;
if (unlikely(istat & (~QLOGIC_IB_I_BITSEXTANT |
QLOGIC_IB_I_GPIO | QLOGIC_IB_I_ERROR)))
unlikely_6120_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 = (1U << QLOGIC_IB_I_RCVAVAIL_SHIFT) |
(1U << QLOGIC_IB_I_RCVURG_SHIFT);
for (i = 0; i < dd->first_user_ctxt; i++) {
if (ctxtrbits & rmask) {
ctxtrbits &= ~rmask;
crcs += qib_kreceive(dd->rcd[i],
&dd->cspec->lli_counter,
NULL);
}
rmask <<= 1;
}
if (crcs) {
u32 cntr = dd->cspec->lli_counter;
cntr += crcs;
if (cntr) {
if (cntr > dd->cspec->lli_thresh) {
dd->cspec->lli_counter = 0;
dd->cspec->lli_errs++;
} else
dd->cspec->lli_counter += cntr;
}
}
if (ctxtrbits) {
ctxtrbits =
(ctxtrbits >> QLOGIC_IB_I_RCVAVAIL_SHIFT) |
(ctxtrbits >> QLOGIC_IB_I_RCVURG_SHIFT);
qib_handle_urcv(dd, ctxtrbits);
}
}
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.
*/
static void qib_setup_6120_interrupt(struct qib_devdata *dd)
{
/*
* If the chip supports added error indication via GPIO pins,
* enable interrupts on those bits so the interrupt routine
* can count the events. Also set flag so interrupt routine
* can know they are expected.
*/
if (SYM_FIELD(dd->revision, Revision_R,
ChipRevMinor) > 1) {
/* Rev2+ reports extra errors via internal GPIO pins */
dd->cspec->gpio_mask |= GPIO_ERRINTR_MASK;
qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
}
if (!dd->cspec->irq)
qib_dev_err(dd, "irq is 0, BIOS error? Interrupts won't "
"work\n");
else {
int ret;
ret = request_irq(dd->cspec->irq, qib_6120intr, 0,
QIB_DRV_NAME, dd);
if (ret)
qib_dev_err(dd, "Couldn't setup interrupt "
"(irq=%d): %d\n", dd->cspec->irq,
ret);
}
}
/**
* pe_boardname - fill in the board name
* @dd: the qlogic_ib device
*
* info is based on the board revision register
*/
static void pe_boardname(struct qib_devdata *dd)
{
char *n;
u32 boardid, namelen;
boardid = SYM_FIELD(dd->revision, Revision,
BoardID);
switch (boardid) {
case 2:
n = "InfiniPath_QLE7140";
break;
default:
qib_dev_err(dd, "Unknown 6120 board with ID %u\n", boardid);
n = "Unknown_InfiniPath_6120";
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 != 4 || !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. If we need interrupt context, we can split
* it into two routines.
*/
static int qib_6120_setup_reset(struct qib_devdata *dd)
{
u64 val;
int i;
int ret;
u16 cmdval;
u8 int_line, clinesz;
qib_pcie_getcmd(dd, &cmdval, &int_line, &clinesz);
/* Use ERROR so it shows up in logs, etc. */
qib_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->unit);
/* no interrupts till re-initted */
qib_6120_set_intr_state(dd, 0);
dd->cspec->ibdeltainprog = 0;
dd->cspec->ibsymdelta = 0;
dd->cspec->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);
dd->int_counter = 0; /* so we check interrupts work again */
val = dd->control | QLOGIC_IB_C_RESET;
writeq(val, &dd->kregbase[kr_control]);
mb(); /* prevent compiler re-ordering 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");
/* clear the reset error, init error/hwerror mask */
qib_6120_init_hwerrors(dd);
/* for Rev2 error interrupts; nop for rev 1 */
qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
/* clear the reset error, init error/hwerror mask */
qib_6120_init_hwerrors(dd);
}
return ret;
}
/**
* qib_6120_put_tid - write a TID in chip
* @dd: the qlogic_ib device
* @tidptr: pointer to the expected TID (in chip) to update
* @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0)
* for expected
* @pa: physical address of in memory buffer; tidinvalid if freeing
*
* This exists as a separate routine to allow for special locking etc.
* It's used for both the full cleanup on exit, as well as the normal
* setup and teardown.
*/
static void qib_6120_put_tid(struct qib_devdata *dd, u64 __iomem *tidptr,
u32 type, unsigned long pa)
{
u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
unsigned long flags;
int tidx;
spinlock_t *tidlockp; /* select appropriate spinlock */
if (!dd->kregbase)
return;
if (pa != dd->tidinvalid) {
if (pa & ((1U << 11) - 1)) {
qib_dev_err(dd, "Physaddr %lx not 2KB aligned!\n",
pa);
return;
}
pa >>= 11;
if (pa & ~QLOGIC_IB_RT_ADDR_MASK) {
qib_dev_err(dd, "Physical page address 0x%lx "
"larger than supported\n", pa);
return;
}
if (type == RCVHQ_RCV_TYPE_EAGER)
pa |= dd->tidtemplate;
else /* for now, always full 4KB page */
pa |= 2 << 29;
}
/*
* Avoid chip issue by writing the scratch register
* before and after the TID, and with an io write barrier.
* We use a spinlock around the writes, so they can't intermix
* with other TID (eager or expected) writes (the chip problem
* is triggered by back to back TID writes). Unfortunately, this
* call can be done from interrupt level for the ctxt 0 eager TIDs,
* so we have to use irqsave locks.
*/
/*
* Assumes tidptr always > egrtidbase
* if type == RCVHQ_RCV_TYPE_EAGER.
*/
tidx = tidptr - dd->egrtidbase;
tidlockp = (type == RCVHQ_RCV_TYPE_EAGER && tidx < dd->rcvhdrcnt)
? &dd->cspec->kernel_tid_lock : &dd->cspec->user_tid_lock;
spin_lock_irqsave(tidlockp, flags);
qib_write_kreg(dd, kr_scratch, 0xfeeddeaf);
writel(pa, tidp32);
qib_write_kreg(dd, kr_scratch, 0xdeadbeef);
mmiowb();
spin_unlock_irqrestore(tidlockp, flags);
}
/**
* qib_6120_put_tid_2 - write a TID in chip, Revision 2 or higher
* @dd: the qlogic_ib device
* @tidptr: pointer to the expected TID (in chip) to update
* @tidtype: RCVHQ_RCV_TYPE_EAGER (1) for eager, RCVHQ_RCV_TYPE_EXPECTED (0)
* for expected
* @pa: physical address of in memory buffer; tidinvalid if freeing
*
* This exists as a separate routine to allow for selection of the
* appropriate "flavor". The static calls in cleanup just use the
* revision-agnostic form, as they are not performance critical.
*/
static void qib_6120_put_tid_2(struct qib_devdata *dd, u64 __iomem *tidptr,
u32 type, unsigned long pa)
{
u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
u32 tidx;
if (!dd->kregbase)
return;
if (pa != dd->tidinvalid) {
if (pa & ((1U << 11) - 1)) {
qib_dev_err(dd, "Physaddr %lx not 2KB aligned!\n",
pa);
return;
}
pa >>= 11;
if (pa & ~QLOGIC_IB_RT_ADDR_MASK) {
qib_dev_err(dd, "Physical page address 0x%lx "
"larger than supported\n", pa);
return;
}
if (type == RCVHQ_RCV_TYPE_EAGER)
pa |= dd->tidtemplate;
else /* for now, always full 4KB page */
pa |= 2 << 29;
}
tidx = tidptr - dd->egrtidbase;
writel(pa, tidp32);
mmiowb();
}
/**
* qib_6120_clear_tids - clear all TID entries for a context, expected and eager
* @dd: the qlogic_ib device
* @ctxt: the context
*
* clear all TID entries for a context, 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_6120_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++)
/* use func pointer because could be one of two funcs */
dd->f_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++)
/* use func pointer because could be one of two funcs */
dd->f_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
tidinv);
}
/**
* qib_6120_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_6120_tidtemplate(struct qib_devdata *dd)
{
u32 egrsize = dd->rcvegrbufsize;
/*
* For now, we always allocate 4KB buffers (at init) so we can
* receive max size packets. We may want a module parameter to
* specify 2KB or 4KB and/or make be per ctxt instead of per device
* for those who want to reduce memory footprint. Note that the
* rcvhdrentsize size must be large enough to hold the largest
* IB header (currently 96 bytes) that we expect to handle (plus of
* course the 2 dwords of RHF).
*/
if (egrsize == 2048)
dd->tidtemplate = 1U << 29;
else if (egrsize == 4096)
dd->tidtemplate = 2U << 29;
dd->tidinvalid = 0;
}
int __attribute__((weak)) qib_unordered_wc(void)
{
return 0;
}
/**
* qib_6120_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 algorithms.
*/
static int qib_6120_get_base_info(struct qib_ctxtdata *rcd,
struct qib_base_info *kinfo)
{
if (qib_unordered_wc())
kinfo->spi_runtime_flags |= QIB_RUNTIME_FORCE_WC_ORDER;
kinfo->spi_runtime_flags |= QIB_RUNTIME_PCIE |
QIB_RUNTIME_FORCE_PIOAVAIL | QIB_RUNTIME_PIO_REGSWAPPED;
return 0;
}
static struct qib_message_header *
qib_6120_get_msgheader(struct qib_devdata *dd, __le32 *rhf_addr)
{
return (struct qib_message_header *)
&rhf_addr[sizeof(u64) / sizeof(u32)];
}
static void qib_6120_config_ctxts(struct qib_devdata *dd)
{
dd->ctxtcnt = qib_read_kreg32(dd, kr_portcnt);
if (qib_n_krcv_queues > 1) {
dd->first_user_ctxt = qib_n_krcv_queues * dd->num_pports;
if (dd->first_user_ctxt > dd->ctxtcnt)
dd->first_user_ctxt = dd->ctxtcnt;
dd->qpn_mask = dd->first_user_ctxt <= 2 ? 2 : 6;
} else
dd->first_user_ctxt = dd->num_pports;
dd->n_krcv_queues = dd->first_user_ctxt;
}
static void qib_update_6120_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_6120_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;
}
/*
* Used when we close any ctxt, for DMA already in flight
* at close. Can't be done until we know hdrq size, so not
* early in chip init.
*/
static void alloc_dummy_hdrq(struct qib_devdata *dd)
{
dd->cspec->dummy_hdrq = dma_alloc_coherent(&dd->pcidev->dev,
dd->rcd[0]->rcvhdrq_size,
&dd->cspec->dummy_hdrq_phys,
GFP_ATOMIC | __GFP_COMP);
if (!dd->cspec->dummy_hdrq) {
qib_devinfo(dd->pcidev, "Couldn't allocate dummy hdrq\n");
/* fallback to just 0'ing */
dd->cspec->dummy_hdrq_phys = 0UL;
}
}
/*
* Modify the RCVCTRL register in chip-specific way. This
* is a function because bit positions and (future) register
* location is chip-specific, but the needed operations are
* generic. <op> is a bit-mask because we often want to
* do multiple modifications.
*/
static void rcvctrl_6120_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 << QLOGIC_IB_R_TAILUPD_SHIFT);
if (op & QIB_RCVCTRL_TAILUPD_DIS)
dd->rcvctrl &= ~(1ULL << QLOGIC_IB_R_TAILUPD_SHIFT);
if (op & QIB_RCVCTRL_PKEY_ENB)
dd->rcvctrl &= ~(1ULL << IBA6120_R_PKEY_DIS_SHIFT);
if (op & QIB_RCVCTRL_PKEY_DIS)
dd->rcvctrl |= (1ULL << IBA6120_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 << QLOGIC_IB_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);
if (ctxt == 0 && !dd->cspec->dummy_hdrq)
alloc_dummy_hdrq(dd);
}
if (op & QIB_RCVCTRL_CTXT_DIS)
dd->rcvctrl &= ~(mask << SYM_LSB(RcvCtrl, PortEnable));
if (op & QIB_RCVCTRL_INTRAVAIL_ENB)
dd->rcvctrl |= (mask << QLOGIC_IB_R_INTRAVAIL_SHIFT);
if (op & QIB_RCVCTRL_INTRAVAIL_DIS)
dd->rcvctrl &= ~(mask << QLOGIC_IB_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) {
/*
* Be paranoid, and never write 0's to these, just use an
* unused page. Of course,
* rcvhdraddr points to a large chunk of memory, so this
* could still trash things, but at least it won't trash
* page 0, and by disabling the ctxt, it should stop "soon",
* even if a packet or two is in already in flight after we
* disabled the ctxt. Only 6120 has this issue.
*/
if (ctxt >= 0) {
qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr, ctxt,
dd->cspec->dummy_hdrq_phys);
qib_write_kreg_ctxt(dd, kr_rcvhdraddr, ctxt,
dd->cspec->dummy_hdrq_phys);
} else {
unsigned i;
for (i = 0; i < dd->cfgctxts; i++) {
qib_write_kreg_ctxt(dd, kr_rcvhdrtailaddr,
i, dd->cspec->dummy_hdrq_phys);
qib_write_kreg_ctxt(dd, kr_rcvhdraddr,
i, dd->cspec->dummy_hdrq_phys);
}
}
}
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. Only operations actually used
* are implemented yet.
* Chip requires no back-back sendctrl writes, so write
* scratch register after writing sendctrl
*/
static void sendctrl_6120_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, PIOEnable);
else if (op & QIB_SENDCTRL_SEND_ENB)
dd->sendctrl |= SYM_MASK(SendCtrl, PIOEnable);
if (op & QIB_SENDCTRL_AVAIL_DIS)
dd->sendctrl &= ~SYM_MASK(SendCtrl, PIOBufAvailUpd);
else if (op & QIB_SENDCTRL_AVAIL_ENB)
dd->sendctrl |= SYM_MASK(SendCtrl, PIOBufAvailUpd);
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, PIOEnable) |
SYM_MASK(SendCtrl, PIOBufAvailUpd));
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_6120_SendCtrl_DisarmPIOBuf_RMASK) <<
SYM_LSB(SendCtrl, DisarmPIOBuf));
if (op & QIB_SENDCTRL_AVAIL_BLIP)
tmp_dd_sendctrl &= ~SYM_MASK(SendCtrl, PIOBufAvailUpd);
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_6120 - read a per-port counter
* @dd: the qlogic_ib device
* @creg: the counter to snapshot
*/
static u64 qib_portcntr_6120(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] = 0xffff,
[QIBPORTCNTR_PSXMITPKTS] = 0xffff,
[QIBPORTCNTR_PSXMITWAIT] = 0xffff,
[QIBPORTCNTR_SENDSTALL] = cr_sendstall,
[QIBPORTCNTR_PKTRCV] = cr_pktrcv,
[QIBPORTCNTR_PSRCVDATA] = 0xffff,
[QIBPORTCNTR_PSRCVPKTS] = 0xffff,
[QIBPORTCNTR_RCVEBP] = cr_rcvebp,
[QIBPORTCNTR_RCVOVFL] = cr_rcvovfl,
[QIBPORTCNTR_WORDRCV] = cr_wordrcv,
[QIBPORTCNTR_RXDROPPKT] = cr_rxdroppkt,
[QIBPORTCNTR_RXLOCALPHYERR] = 0xffff,
[QIBPORTCNTR_RXVLERR] = 0xffff,
[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] = 0xffff,
[QIBPORTCNTR_ERRLINK] = cr_errlink,
[QIBPORTCNTR_IBLINKDOWN] = cr_iblinkdown,
[QIBPORTCNTR_IBLINKERRRECOV] = cr_iblinkerrrecov,
[QIBPORTCNTR_LLI] = 0xffff,
[QIBPORTCNTR_PSINTERVAL] = 0xffff,
[QIBPORTCNTR_PSSTART] = 0xffff,
[QIBPORTCNTR_PSSTAT] = 0xffff,
[QIBPORTCNTR_VL15PKTDROP] = 0xffff,
[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];
/* handle counters requests not implemented as chip counters */
if (reg == QIBPORTCNTR_LLI)
ret = dd->cspec->lli_errs;
else if (reg == QIBPORTCNTR_EXCESSBUFOVFL)
ret = dd->cspec->overrun_thresh_errs;
else if (reg == QIBPORTCNTR_KHDROVFL) {
int i;
/* sum over all kernel contexts */
for (i = 0; i < dd->first_user_ctxt; i++)
ret += read_6120_creg32(dd, cr_portovfl + i);
} else if (reg == QIBPORTCNTR_PSSTAT)
ret = dd->cspec->pma_sample_status;
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_6120_creg(dd, creg);
else
ret = read_6120_creg32(dd, creg);
if (creg == cr_ibsymbolerr) {
if (dd->cspec->ibdeltainprog)
ret -= ret - dd->cspec->ibsymsnap;
ret -= dd->cspec->ibsymdelta;
} else if (creg == cr_iblinkerrrecov) {
if (dd->cspec->ibdeltainprog)
ret -= ret - dd->cspec->iblnkerrsnap;
ret -= dd->cspec->iblnkerrdelta;
}
if (reg == QIBPORTCNTR_RXDROPPKT) /* add special cased count */
ret += dd->cspec->rxfc_unsupvl_errs;
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.
* cntr6120indices contains the corresponding register indices.
*/
static const char cntr6120names[] =
"Interrupts\n"
"HostBusStall\n"
"E RxTIDFull\n"
"RxTIDInvalid\n"
"Ctxt0EgrOvfl\n"
"Ctxt1EgrOvfl\n"
"Ctxt2EgrOvfl\n"
"Ctxt3EgrOvfl\n"
"Ctxt4EgrOvfl\n";
static const size_t cntr6120indices[] = {
cr_lbint,
cr_lbflowstall,
cr_errtidfull,
cr_errtidvalid,
cr_portovfl + 0,
cr_portovfl + 1,
cr_portovfl + 2,
cr_portovfl + 3,
cr_portovfl + 4,
};
/*
* same as cntr6120names and cntr6120indices, but for port-specific counters.
* portcntr6120indices is somewhat complicated by some registers needing
* adjustments of various kinds, and those are ORed with _PORT_VIRT_FLAG
*/
static const char portcntr6120names[] =
"TxPkt\n"
"TxFlowPkt\n"
"TxWords\n"
"RxPkt\n"
"RxFlowPkt\n"
"RxWords\n"
"TxFlowStall\n"
"E 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"
;
#define _PORT_VIRT_FLAG 0x8000 /* "virtual", need adjustments */
static const size_t portcntr6120indices[] = {
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_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,
};
/* do all the setup to make the counter reads efficient later */
static void init_6120_cntrnames(struct qib_devdata *dd)
{
int i, j = 0;
char *s;
for (i = 0, s = (char *)cntr6120names; 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(cntr6120names) - 1;
else
dd->cspec->cntrnamelen = 1 + s - cntr6120names;
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 *)portcntr6120names; s; i++)
s = strchr(s + 1, '\n');
dd->cspec->nportcntrs = i - 1;
dd->cspec->portcntrnamelen = sizeof(portcntr6120names) - 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_6120cntrs(struct qib_devdata *dd, loff_t pos, char **namep,
u64 **cntrp)
{
u32 ret;
if (namep) {
ret = dd->cspec->cntrnamelen;
if (pos >= ret)
ret = 0; /* final read after getting everything */
else
*namep = (char *)cntr6120names;
} 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;
}
if (pos >= ret) {
ret = 0; /* final read after getting everything */
goto done;
}
*cntrp = cntr;
for (i = 0; i < dd->cspec->ncntrs; i++)
*cntr++ = read_6120_creg32(dd, cntr6120indices[i]);
}
done:
return ret;
}
static u32 qib_read_6120portcntrs(struct qib_devdata *dd, loff_t pos, u32 port,
char **namep, u64 **cntrp)
{
u32 ret;
if (namep) {
ret = dd->cspec->portcntrnamelen;
if (pos >= ret)
ret = 0; /* final read after getting everything */
else
*namep = (char *)portcntr6120names;
} 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 (portcntr6120indices[i] & _PORT_VIRT_FLAG)
*cntr++ = qib_portcntr_6120(ppd,
portcntr6120indices[i] &
~_PORT_VIRT_FLAG);
else
*cntr++ = read_6120_creg32(dd,
portcntr6120indices[i]);
}
}
done:
return ret;
}
static void qib_chk_6120_errormask(struct qib_devdata *dd)
{
static u32 fixed;
u32 ctrl;
unsigned long errormask;
unsigned long hwerrs;
if (!dd->cspec->errormask || !(dd->flags & QIB_INITTED))
return;
errormask = qib_read_kreg64(dd, kr_errmask);
if (errormask == dd->cspec->errormask)
return;
fixed++;
hwerrs = qib_read_kreg64(dd, kr_hwerrstatus);
ctrl = qib_read_kreg32(dd, kr_control);
qib_write_kreg(dd, kr_errmask,
dd->cspec->errormask);
if ((hwerrs & dd->cspec->hwerrmask) ||
(ctrl & QLOGIC_IB_C_FREEZEMODE)) {
qib_write_kreg(dd, kr_hwerrclear, 0ULL);
qib_write_kreg(dd, kr_errclear, 0ULL);
/* force re-interrupt of pending events, just in case */
qib_write_kreg(dd, kr_intclear, 0ULL);
qib_devinfo(dd->pcidev,
"errormask fixed(%u) %lx->%lx, ctrl %x hwerr %lx\n",
fixed, errormask, (unsigned long)dd->cspec->errormask,
ctrl, hwerrs);
}
}
/**
* qib_get_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_6120_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_6120(ppd, cr_wordsend) +
qib_portcntr_6120(ppd, cr_wordrcv);
spin_lock_irqsave(&dd->eep_st_lock, flags);
traffic_wds -= dd->traffic_wds;
dd->traffic_wds += traffic_wds;
if (traffic_wds >= QIB_TRAFFIC_ACTIVE_THRESHOLD)
atomic_add(5, &dd->active_time); /* S/B #define */
spin_unlock_irqrestore(&dd->eep_st_lock, flags);
qib_chk_6120_errormask(dd);
done:
mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
}
/* no interrupt fallback for these chips */
static int qib_6120_nointr_fallback(struct qib_devdata *dd)
{
return 0;
}
/*
* 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_6120_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);
}
static int qib_6120_get_ib_cfg(struct qib_pportdata *ppd, int which)
{
int ret;
switch (which) {
case QIB_IB_CFG_LWID:
ret = ppd->link_width_active;
break;
case QIB_IB_CFG_SPD:
ret = ppd->link_speed_active;
break;
case QIB_IB_CFG_LWID_ENB:
ret = ppd->link_width_enabled;
break;
case QIB_IB_CFG_SPD_ENB:
ret = ppd->link_speed_enabled;
break;
case QIB_IB_CFG_OP_VLS:
ret = ppd->vls_operational;
break;
case QIB_IB_CFG_VL_HIGH_CAP:
ret = 0;
break;
case QIB_IB_CFG_VL_LOW_CAP:
ret = 0;
break;
case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
ret = SYM_FIELD(ppd->dd->cspec->ibcctrl, IBCCtrl,
OverrunThreshold);
break;
case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
ret = SYM_FIELD(ppd->dd->cspec->ibcctrl, IBCCtrl,
PhyerrThreshold);
break;
case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
/* will only take effect when the link state changes */
ret = (ppd->dd->cspec->ibcctrl &
SYM_MASK(IBCCtrl, LinkDownDefaultState)) ?
IB_LINKINITCMD_SLEEP : IB_LINKINITCMD_POLL;
break;
case QIB_IB_CFG_HRTBT: /* Get Heartbeat off/enable/auto */
ret = 0; /* no heartbeat on this chip */
break;
case QIB_IB_CFG_PMA_TICKS:
ret = 250; /* 1 usec. */
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
/*
* We assume range checking is already done, if needed.
*/
static int qib_6120_set_ib_cfg(struct qib_pportdata *ppd, int which, u32 val)
{
struct qib_devdata *dd = ppd->dd;
int ret = 0;
u64 val64;
u16 lcmd, licmd;
switch (which) {
case QIB_IB_CFG_LWID_ENB:
ppd->link_width_enabled = val;
break;
case QIB_IB_CFG_SPD_ENB:
ppd->link_speed_enabled = val;
break;
case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
val64 = SYM_FIELD(dd->cspec->ibcctrl, IBCCtrl,
OverrunThreshold);
if (val64 != val) {
dd->cspec->ibcctrl &=
~SYM_MASK(IBCCtrl, OverrunThreshold);
dd->cspec->ibcctrl |= (u64) val <<
SYM_LSB(IBCCtrl, OverrunThreshold);
qib_write_kreg(dd, kr_ibcctrl, dd->cspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
}
break;
case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
val64 = SYM_FIELD(dd->cspec->ibcctrl, IBCCtrl,
PhyerrThreshold);
if (val64 != val) {
dd->cspec->ibcctrl &=
~SYM_MASK(IBCCtrl, PhyerrThreshold);
dd->cspec->ibcctrl |= (u64) val <<
SYM_LSB(IBCCtrl, PhyerrThreshold);
qib_write_kreg(dd, kr_ibcctrl, dd->cspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
}
break;
case QIB_IB_CFG_PKEYS: /* update pkeys */
val64 = (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, val64);
break;
case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
/* will only take effect when the link state changes */
if (val == IB_LINKINITCMD_POLL)
dd->cspec->ibcctrl &=
~SYM_MASK(IBCCtrl, LinkDownDefaultState);
else /* SLEEP */
dd->cspec->ibcctrl |=
SYM_MASK(IBCCtrl, LinkDownDefaultState);
qib_write_kreg(dd, kr_ibcctrl, dd->cspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
break;
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;
dd->cspec->ibcctrl &= ~SYM_MASK(IBCCtrl, MaxPktLen);
dd->cspec->ibcctrl |= (u64)val <<
SYM_LSB(IBCCtrl, MaxPktLen);
qib_write_kreg(dd, kr_ibcctrl, dd->cspec->ibcctrl);
qib_write_kreg(dd, kr_scratch, 0);
break;
case QIB_IB_CFG_LSTATE: /* set the IB link state */
switch (val & 0xffff0000) {
case IB_LINKCMD_DOWN:
lcmd = QLOGIC_IB_IBCC_LINKCMD_DOWN;
if (!dd->cspec->ibdeltainprog) {
dd->cspec->ibdeltainprog = 1;
dd->cspec->ibsymsnap =
read_6120_creg32(dd, cr_ibsymbolerr);
dd->cspec->iblnkerrsnap =
read_6120_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;
break;
default:
ret = -EINVAL;
qib_dev_err(dd, "bad linkinitcmd req 0x%x\n",
val & 0xffff);
goto bail;
}
qib_set_ib_6120_lstate(ppd, lcmd, licmd);
goto bail;
case QIB_IB_CFG_HRTBT:
ret = -EINVAL;
break;
default:
ret = -EINVAL;
}
bail:
return ret;
}
static int qib_6120_set_loopback(struct qib_pportdata *ppd, const char *what)
{
int ret = 0;
if (!strncmp(what, "ibc", 3)) {
ppd->dd->cspec->ibcctrl |= SYM_MASK(IBCCtrl, Loopback);
qib_devinfo(ppd->dd->pcidev, "Enabling IB%u:%u IBC loopback\n",
ppd->dd->unit, ppd->port);
} else if (!strncmp(what, "off", 3)) {
ppd->dd->cspec->ibcctrl &= ~SYM_MASK(IBCCtrl, Loopback);
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->dd->cspec->ibcctrl);
qib_write_kreg(ppd->dd, kr_scratch, 0);
}
return ret;
}
static void pma_6120_timer(unsigned long data)
{
struct qib_pportdata *ppd = (struct qib_pportdata *)data;
struct qib_chip_specific *cs = ppd->dd->cspec;
struct qib_ibport *ibp = &ppd->ibport_data;
unsigned long flags;
spin_lock_irqsave(&ibp->lock, flags);
if (cs->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED) {
cs->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
qib_snapshot_counters(ppd, &cs->sword, &cs->rword,
&cs->spkts, &cs->rpkts, &cs->xmit_wait);
mod_timer(&cs->pma_timer,
jiffies + usecs_to_jiffies(ibp->pma_sample_interval));
} else if (cs->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) {
u64 ta, tb, tc, td, te;
cs->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
qib_snapshot_counters(ppd, &ta, &tb, &tc, &td, &te);
cs->sword = ta - cs->sword;
cs->rword = tb - cs->rword;
cs->spkts = tc - cs->spkts;
cs->rpkts = td - cs->rpkts;
cs->xmit_wait = te - cs->xmit_wait;
}
spin_unlock_irqrestore(&ibp->lock, flags);
}
/*
* Note that the caller has the ibp->lock held.
*/
static void qib_set_cntr_6120_sample(struct qib_pportdata *ppd, u32 intv,
u32 start)
{
struct qib_chip_specific *cs = ppd->dd->cspec;
if (start && intv) {
cs->pma_sample_status = IB_PMA_SAMPLE_STATUS_STARTED;
mod_timer(&cs->pma_timer, jiffies + usecs_to_jiffies(start));
} else if (intv) {
cs->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
qib_snapshot_counters(ppd, &cs->sword, &cs->rword,
&cs->spkts, &cs->rpkts, &cs->xmit_wait);
mod_timer(&cs->pma_timer, jiffies + usecs_to_jiffies(intv));
} else {
cs->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
cs->sword = 0;
cs->rword = 0;
cs->spkts = 0;
cs->rpkts = 0;
cs->xmit_wait = 0;
}
}
static u32 qib_6120_iblink_state(u64 ibcs)
{
u32 state = (u32)SYM_FIELD(ibcs, IBCStatus, LinkState);
switch (state) {
case IB_6120_L_STATE_INIT:
state = IB_PORT_INIT;
break;
case IB_6120_L_STATE_ARM:
state = IB_PORT_ARMED;
break;
case IB_6120_L_STATE_ACTIVE:
/* fall through */
case IB_6120_L_STATE_ACT_DEFER:
state = IB_PORT_ACTIVE;
break;
default: /* fall through */
case IB_6120_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_6120_phys_portstate(u64 ibcs)
{
u8 state = (u8)SYM_FIELD(ibcs, IBCStatus, LinkTrainingState);
return qib_6120_physportstate[state];
}
static int qib_6120_ib_updown(struct qib_pportdata *ppd, int ibup, u64 ibcs)
{
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) {
if (ppd->dd->cspec->ibdeltainprog) {
ppd->dd->cspec->ibdeltainprog = 0;
ppd->dd->cspec->ibsymdelta +=
read_6120_creg32(ppd->dd, cr_ibsymbolerr) -
ppd->dd->cspec->ibsymsnap;
ppd->dd->cspec->iblnkerrdelta +=
read_6120_creg32(ppd->dd, cr_iblinkerrrecov) -
ppd->dd->cspec->iblnkerrsnap;
}
qib_hol_init(ppd);
} else {
ppd->dd->cspec->lli_counter = 0;
if (!ppd->dd->cspec->ibdeltainprog) {
ppd->dd->cspec->ibdeltainprog = 1;
ppd->dd->cspec->ibsymsnap =
read_6120_creg32(ppd->dd, cr_ibsymbolerr);
ppd->dd->cspec->iblnkerrsnap =
read_6120_creg32(ppd->dd, cr_iblinkerrrecov);
}
qib_hol_down(ppd);
}
qib_6120_setup_setextled(ppd, ibup);
return 0;
}
/* 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_6120_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_6120_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;
dd->rcvhdrcnt = qib_read_kreg32(dd, kr_rcvegrcnt);
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
* get_6120_chip_params(), so split out as separate function
*/
static void set_6120_baseaddrs(struct qib_devdata *dd)
{
u32 cregbase;
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);
}
/*
* 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_6120_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;
}
return ret;
}
static int init_6120_variables(struct qib_devdata *dd)
{
int ret = 0;
struct qib_pportdata *ppd;
u32 sbufs;
ppd = (struct qib_pportdata *)(dd + 1);
dd->pport = ppd;
dd->num_pports = 1;
dd->cspec = (struct qib_chip_specific *)(ppd + dd->num_pports);
ppd->cpspec = NULL; /* not used in this chip */
spin_lock_init(&dd->cspec->kernel_tid_lock);
spin_lock_init(&dd->cspec->user_tid_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_6120_chip_params(dd);
pe_boardname(dd); /* fill in boardname */
/*
* 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_NO_DEV;
if (qib_unordered_wc())
dd->flags |= QIB_PIO_FLUSH_WC;
/*
* 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);
/* Ignore errors in PIO/PBC on systems with unordered write-combining */
if (qib_unordered_wc())
dd->eep_st_masks[0].hwerrs_to_log &= ~TXE_PIO_PARITY;
dd->eep_st_masks[1].hwerrs_to_log = HWE_MASK(RXEMemParityErr);
dd->eep_st_masks[2].errs_to_log = ERR_MASK(ResetNegated);
qib_init_pportdata(ppd, dd, 0, 1);
ppd->link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
ppd->link_speed_supported = QIB_IB_SDR;
ppd->link_width_enabled = IB_WIDTH_4X;
ppd->link_speed_enabled = ppd->link_speed_supported;
/* these can't change for this chip, so set once */
ppd->link_width_active = ppd->link_width_enabled;
ppd->link_speed_active = ppd->link_speed_enabled;
ppd->vls_supported = IB_VL_VL0;
ppd->vls_operational = ppd->vls_supported;
dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE;
dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE;
dd->rhf_offset = 0;
/* 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_6120_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_6120_faststats;
dd->stats_timer.data = (unsigned long) dd;
init_timer(&dd->cspec->pma_timer);
dd->cspec->pma_timer.function = pma_6120_timer;
dd->cspec->pma_timer.data = (unsigned long) ppd;
dd->ureg_align = qib_read_kreg32(dd, kr_palign);
dd->piosize2kmax_dwords = dd->piosize2k >> 2;
qib_6120_config_ctxts(dd);
qib_set_ctxtcnt(dd);
if (qib_wc_pat) {
ret = init_chip_wc_pat(dd, 0);
if (ret)
goto bail;
}
set_6120_baseaddrs(dd); /* set chip access pointers now */
ret = 0;
if (qib_mini_init)
goto bail;
qib_num_cfg_vls = 1; /* if any 6120's, only one VL */
ret = qib_create_ctxts(dd);
init_6120_cntrnames(dd);
/* use all of 4KB buffers for the kernel, otherwise 16 */
sbufs = dd->piobcnt4k ? dd->piobcnt4k : 16;
dd->lastctxt_piobuf = dd->piobcnt2k + dd->piobcnt4k - sbufs;
dd->pbufsctxt = dd->lastctxt_piobuf /
(dd->cfgctxts - dd->first_user_ctxt);
if (ret)
goto bail;
bail:
return ret;
}
/*
* 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_6120_link_buf(struct qib_pportdata *ppd, u32 *bnum)
{
u32 __iomem *buf;
u32 lbuf = ppd->dd->piobcnt2k + ppd->dd->piobcnt4k - 1;
/*
* always blip to get avail list updated, since it's almost
* always needed, and is fairly cheap.
*/
sendctrl_6120_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;
sendctrl_6120_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 */
qib_read_kreg64(ppd->dd, kr_scratch); /* extra chip flush */
buf = qib_getsendbuf_range(ppd->dd, bnum, lbuf, lbuf);
done:
return buf;
}
static u32 __iomem *qib_6120_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_6120_VL15_SEND_CTRL) &&
!(ppd->lflags & (QIBL_IB_AUTONEG_INPROG | QIBL_LINKACTIVE)))
buf = get_6120_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->piobcnt2k + dd->piobcnt4k - 1;
buf = qib_getsendbuf_range(dd, pbufnum, first, last);
}
return buf;
}
static int init_sdma_6120_regs(struct qib_pportdata *ppd)
{
return -ENODEV;
}
static u16 qib_sdma_6120_gethead(struct qib_pportdata *ppd)
{
return 0;
}
static int qib_sdma_6120_busy(struct qib_pportdata *ppd)
{
return 0;
}
static void qib_sdma_update_6120_tail(struct qib_pportdata *ppd, u16 tail)
{
}
static void qib_6120_sdma_sendctrl(struct qib_pportdata *ppd, unsigned op)
{
}
static void qib_sdma_set_6120_desc_cnt(struct qib_pportdata *ppd, unsigned cnt)
{
}
/*
* the pbc doesn't need a VL15 indicator, but we need it for link_buf.
* The chip ignores the bit if set.
*/
static u32 qib_6120_setpbc_control(struct qib_pportdata *ppd, u32 plen,
u8 srate, u8 vl)
{
return vl == 15 ? PBC_6120_VL15_SEND_CTRL : 0;
}
static void qib_6120_initvl15_bufs(struct qib_devdata *dd)
{
}
static void qib_6120_init_ctxt(struct qib_ctxtdata *rcd)
{
rcd->rcvegrcnt = rcd->dd->rcvhdrcnt;
rcd->rcvegr_tid_base = rcd->ctxt * rcd->rcvegrcnt;
}
static void qib_6120_txchk_change(struct qib_devdata *dd, u32 start,
u32 len, u32 avail, struct qib_ctxtdata *rcd)
{
}
static void writescratch(struct qib_devdata *dd, u32 val)
{
(void) qib_write_kreg(dd, kr_scratch, val);
}
static int qib_6120_tempsense_rd(struct qib_devdata *dd, int regnum)
{
return -ENXIO;
}
/* Dummy function, as 6120 boards never disable EEPROM Write */
static int qib_6120_eeprom_wen(struct qib_devdata *dd, int wen)
{
return 1;
}
/**
* qib_init_iba6120_funcs - set up the chip-specific function pointers
* @pdev: pci_dev of the qlogic_ib device
* @ent: pci_device_id matching this chip
*
* This is global, and is called directly at init to set up the
* chip-specific function pointers for later use.
*
* It also allocates/partially-inits the qib_devdata struct for
* this device.
*/
struct qib_devdata *qib_init_iba6120_funcs(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct qib_devdata *dd;
int ret;
dd = qib_alloc_devdata(pdev, sizeof(struct qib_pportdata) +
sizeof(struct qib_chip_specific));
if (IS_ERR(dd))
goto bail;
dd->f_bringup_serdes = qib_6120_bringup_serdes;
dd->f_cleanup = qib_6120_setup_cleanup;
dd->f_clear_tids = qib_6120_clear_tids;
dd->f_free_irq = qib_6120_free_irq;
dd->f_get_base_info = qib_6120_get_base_info;
dd->f_get_msgheader = qib_6120_get_msgheader;
dd->f_getsendbuf = qib_6120_getsendbuf;
dd->f_gpio_mod = gpio_6120_mod;
dd->f_eeprom_wen = qib_6120_eeprom_wen;
dd->f_hdrqempty = qib_6120_hdrqempty;
dd->f_ib_updown = qib_6120_ib_updown;
dd->f_init_ctxt = qib_6120_init_ctxt;
dd->f_initvl15_bufs = qib_6120_initvl15_bufs;
dd->f_intr_fallback = qib_6120_nointr_fallback;
dd->f_late_initreg = qib_late_6120_initreg;
dd->f_setpbc_control = qib_6120_setpbc_control;
dd->f_portcntr = qib_portcntr_6120;
dd->f_put_tid = (dd->minrev >= 2) ?
qib_6120_put_tid_2 :
qib_6120_put_tid;
dd->f_quiet_serdes = qib_6120_quiet_serdes;
dd->f_rcvctrl = rcvctrl_6120_mod;
dd->f_read_cntrs = qib_read_6120cntrs;
dd->f_read_portcntrs = qib_read_6120portcntrs;
dd->f_reset = qib_6120_setup_reset;
dd->f_init_sdma_regs = init_sdma_6120_regs;
dd->f_sdma_busy = qib_sdma_6120_busy;
dd->f_sdma_gethead = qib_sdma_6120_gethead;
dd->f_sdma_sendctrl = qib_6120_sdma_sendctrl;
dd->f_sdma_set_desc_cnt = qib_sdma_set_6120_desc_cnt;
dd->f_sdma_update_tail = qib_sdma_update_6120_tail;
dd->f_sendctrl = sendctrl_6120_mod;
dd->f_set_armlaunch = qib_set_6120_armlaunch;
dd->f_set_cntr_sample = qib_set_cntr_6120_sample;
dd->f_iblink_state = qib_6120_iblink_state;
dd->f_ibphys_portstate = qib_6120_phys_portstate;
dd->f_get_ib_cfg = qib_6120_get_ib_cfg;
dd->f_set_ib_cfg = qib_6120_set_ib_cfg;
dd->f_set_ib_loopback = qib_6120_set_loopback;
dd->f_set_intr_state = qib_6120_set_intr_state;
dd->f_setextled = qib_6120_setup_setextled;
dd->f_txchk_change = qib_6120_txchk_change;
dd->f_update_usrhead = qib_update_6120_usrhead;
dd->f_wantpiobuf_intr = qib_wantpiobuf_6120_intr;
dd->f_xgxs_reset = qib_6120_xgxs_reset;
dd->f_writescratch = writescratch;
dd->f_tempsense_rd = qib_6120_tempsense_rd;
/*
* 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 and accessible,
* but chip registers are not set up until start of
* init_6120_variables.
*/
ret = qib_pcie_ddinit(dd, pdev, ent);
if (ret < 0)
goto bail_free;
/* initialize chip-specific variables */
ret = init_6120_variables(dd);
if (ret)
goto bail_cleanup;
if (qib_mini_init)
goto bail;
if (qib_pcie_params(dd, 8, NULL, NULL))
qib_dev_err(dd, "Failed to setup PCIe or interrupts; "
"continuing anyway\n");
dd->cspec->irq = pdev->irq; /* save IRQ */
/* clear diagctrl register, in case diags were running and crashed */
qib_write_kreg(dd, kr_hwdiagctrl, 0);
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_6120_interrupt(dd);
/* Note that qpn_mask is set by qib_6120_config_ctxts() first */
qib_6120_init_hwerrors(dd);
goto bail;
bail_cleanup:
qib_pcie_ddcleanup(dd);
bail_free:
qib_free_devdata(dd);
dd = ERR_PTR(ret);
bail:
return dd;
}
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