Add linux-next specific files for 20110831

[linux-2.6/next.git] / drivers / infiniband / hw / qib / qib_iba7322.c

/*
 * Copyright (c) 2008, 2009, 2010 QLogic Corporation. 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
 * InfiniPath 7322 chip
 */

#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_smi.h>

#include "qib.h"
#include "qib_7322_regs.h"
#include "qib_qsfp.h"

#include "qib_mad.h"

static void qib_setup_7322_setextled(struct qib_pportdata *, u32);
static void qib_7322_handle_hwerrors(struct qib_devdata *, char *, size_t);
static void sendctrl_7322_mod(struct qib_pportdata *ppd, u32 op);
static irqreturn_t qib_7322intr(int irq, void *data);
static irqreturn_t qib_7322bufavail(int irq, void *data);
static irqreturn_t sdma_intr(int irq, void *data);
static irqreturn_t sdma_idle_intr(int irq, void *data);
static irqreturn_t sdma_progress_intr(int irq, void *data);
static irqreturn_t sdma_cleanup_intr(int irq, void *data);
static void qib_7322_txchk_change(struct qib_devdata *, u32, u32, u32,
                                  struct qib_ctxtdata *rcd);
static u8 qib_7322_phys_portstate(u64);
static u32 qib_7322_iblink_state(u64);
static void qib_set_ib_7322_lstate(struct qib_pportdata *ppd, u16 linkcmd,
                                   u16 linitcmd);
static void force_h1(struct qib_pportdata *);
static void adj_tx_serdes(struct qib_pportdata *);
static u32 qib_7322_setpbc_control(struct qib_pportdata *, u32, u8, u8);
static void qib_7322_mini_pcs_reset(struct qib_pportdata *);

static u32 ahb_mod(struct qib_devdata *, int, int, int, u32, u32);
static void ibsd_wr_allchans(struct qib_pportdata *, int, unsigned, unsigned);
static void serdes_7322_los_enable(struct qib_pportdata *, int);
static int serdes_7322_init_old(struct qib_pportdata *);
static int serdes_7322_init_new(struct qib_pportdata *);

#define BMASK(msb, lsb) (((1 << ((msb) + 1 - (lsb))) - 1) << (lsb))

/* LE2 serdes values for different cases */
#define LE2_DEFAULT 5
#define LE2_5m 4
#define LE2_QME 0

/* Below is special-purpose, so only really works for the IB SerDes blocks. */
#define IBSD(hw_pidx) (hw_pidx + 2)

/* these are variables for documentation and experimentation purposes */
static const unsigned rcv_int_timeout = 375;
static const unsigned rcv_int_count = 16;
static const unsigned sdma_idle_cnt = 64;

/* Time to stop altering Rx Equalization parameters, after link up. */
#define RXEQ_DISABLE_MSECS 2500

/*
 * Number of VLs we are configured to use (to allow for more
 * credits per vl, etc.)
 */
ushort qib_num_cfg_vls = 2;
module_param_named(num_vls, qib_num_cfg_vls, ushort, S_IRUGO);
MODULE_PARM_DESC(num_vls, "Set number of Virtual Lanes to use (1-8)");

static ushort qib_chase = 1;
module_param_named(chase, qib_chase, ushort, S_IRUGO);
MODULE_PARM_DESC(chase, "Enable state chase handling");

static ushort qib_long_atten = 10; /* 10 dB ~= 5m length */
module_param_named(long_attenuation, qib_long_atten, ushort, S_IRUGO);
MODULE_PARM_DESC(long_attenuation, \
                 "attenuation cutoff (dB) for long copper cable setup");

static ushort qib_singleport;
module_param_named(singleport, qib_singleport, ushort, S_IRUGO);
MODULE_PARM_DESC(singleport, "Use only IB port 1; more per-port buffer space");

static ushort qib_krcvq01_no_msi;
module_param_named(krcvq01_no_msi, qib_krcvq01_no_msi, ushort, S_IRUGO);
MODULE_PARM_DESC(krcvq01_no_msi, "No MSI for kctx < 2");

/*
 * Receive header queue sizes
 */
static unsigned qib_rcvhdrcnt;
module_param_named(rcvhdrcnt, qib_rcvhdrcnt, uint, S_IRUGO);
MODULE_PARM_DESC(rcvhdrcnt, "receive header count");

static unsigned qib_rcvhdrsize;
module_param_named(rcvhdrsize, qib_rcvhdrsize, uint, S_IRUGO);
MODULE_PARM_DESC(rcvhdrsize, "receive header size in 32-bit words");

static unsigned qib_rcvhdrentsize;
module_param_named(rcvhdrentsize, qib_rcvhdrentsize, uint, S_IRUGO);
MODULE_PARM_DESC(rcvhdrentsize, "receive header entry size in 32-bit words");

#define MAX_ATTEN_LEN 64 /* plenty for any real system */
/* for read back, default index is ~5m copper cable */
static char txselect_list[MAX_ATTEN_LEN] = "10";
static struct kparam_string kp_txselect = {
        .string = txselect_list,
        .maxlen = MAX_ATTEN_LEN
};
static int  setup_txselect(const char *, struct kernel_param *);
module_param_call(txselect, setup_txselect, param_get_string,
                  &kp_txselect, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(txselect, \
                 "Tx serdes indices (for no QSFP or invalid QSFP data)");

#define BOARD_QME7342 5
#define BOARD_QMH7342 6
#define IS_QMH(dd) (SYM_FIELD((dd)->revision, Revision, BoardID) == \
                    BOARD_QMH7342)
#define IS_QME(dd) (SYM_FIELD((dd)->revision, Revision, BoardID) == \
                    BOARD_QME7342)

#define KREG_IDX(regname)     (QIB_7322_##regname##_OFFS / sizeof(u64))

#define KREG_IBPORT_IDX(regname) ((QIB_7322_##regname##_0_OFFS / sizeof(u64)))

#define MASK_ACROSS(lsb, msb) \
        (((1ULL << ((msb) + 1 - (lsb))) - 1) << (lsb))

#define SYM_RMASK(regname, fldname) ((u64)              \
        QIB_7322_##regname##_##fldname##_RMASK)

#define SYM_MASK(regname, fldname) ((u64)               \
        QIB_7322_##regname##_##fldname##_RMASK <<       \
         QIB_7322_##regname##_##fldname##_LSB)

#define SYM_FIELD(value, regname, fldname) ((u64)       \
        (((value) >> SYM_LSB(regname, fldname)) &       \
         SYM_RMASK(regname, fldname)))

/* useful for things like LaFifoEmpty_0...7, TxCreditOK_0...7, etc. */
#define SYM_FIELD_ACROSS(value, regname, fldname, nbits) \
        (((value) >> SYM_LSB(regname, fldname)) & MASK_ACROSS(0, nbits))

#define HWE_MASK(fldname) SYM_MASK(HwErrMask, fldname##Mask)
#define ERR_MASK(fldname) SYM_MASK(ErrMask, fldname##Mask)
#define ERR_MASK_N(fldname) SYM_MASK(ErrMask_0, fldname##Mask)
#define INT_MASK(fldname) SYM_MASK(IntMask, fldname##IntMask)
#define INT_MASK_P(fldname, port) SYM_MASK(IntMask, fldname##IntMask##_##port)
/* Below because most, but not all, fields of IntMask have that full suffix */
#define INT_MASK_PM(fldname, port) SYM_MASK(IntMask, fldname##Mask##_##port)


#define SYM_LSB(regname, fldname) (QIB_7322_##regname##_##fldname##_LSB)

/*
 * the size bits give us 2^N, in KB units.  0 marks as invalid,
 * and 7 is reserved.  We currently use only 2KB and 4KB
 */
#define IBA7322_TID_SZ_SHIFT QIB_7322_RcvTIDArray0_RT_BufSize_LSB
#define IBA7322_TID_SZ_2K (1UL<<IBA7322_TID_SZ_SHIFT) /* 2KB */
#define IBA7322_TID_SZ_4K (2UL<<IBA7322_TID_SZ_SHIFT) /* 4KB */
#define IBA7322_TID_PA_SHIFT 11U /* TID addr in chip stored w/o low bits */

#define SendIBSLIDAssignMask \
        QIB_7322_SendIBSLIDAssign_0_SendIBSLIDAssign_15_0_RMASK
#define SendIBSLMCMask \
        QIB_7322_SendIBSLIDMask_0_SendIBSLIDMask_15_0_RMASK

#define ExtLED_IB1_YEL SYM_MASK(EXTCtrl, LEDPort0YellowOn)
#define ExtLED_IB1_GRN SYM_MASK(EXTCtrl, LEDPort0GreenOn)
#define ExtLED_IB2_YEL SYM_MASK(EXTCtrl, LEDPort1YellowOn)
#define ExtLED_IB2_GRN SYM_MASK(EXTCtrl, LEDPort1GreenOn)
#define ExtLED_IB1_MASK (ExtLED_IB1_YEL | ExtLED_IB1_GRN)
#define ExtLED_IB2_MASK (ExtLED_IB2_YEL | ExtLED_IB2_GRN)

#define _QIB_GPIO_SDA_NUM 1
#define _QIB_GPIO_SCL_NUM 0
#define QIB_EEPROM_WEN_NUM 14
#define QIB_TWSI_EEPROM_DEV 0xA2 /* All Production 7322 cards. */

/* HW counter clock is at 4nsec */
#define QIB_7322_PSXMITWAIT_CHECK_RATE 4000

/* full speed IB port 1 only */
#define PORT_SPD_CAP (QIB_IB_SDR | QIB_IB_DDR | QIB_IB_QDR)
#define PORT_SPD_CAP_SHIFT 3

/* full speed featuremask, both ports */
#define DUAL_PORT_CAP (PORT_SPD_CAP | (PORT_SPD_CAP << PORT_SPD_CAP_SHIFT))

/*
 * This file contains almost all the chip-specific register information and
 * access functions for the FAKED QLogic InfiniPath 7322 PCI-Express chip.
 */

/* Use defines to tie machine-generated names to lower-case names */
#define kr_contextcnt KREG_IDX(ContextCnt)
#define kr_control KREG_IDX(Control)
#define kr_counterregbase KREG_IDX(CntrRegBase)
#define kr_errclear KREG_IDX(ErrClear)
#define kr_errmask KREG_IDX(ErrMask)
#define kr_errstatus KREG_IDX(ErrStatus)
#define kr_extctrl KREG_IDX(EXTCtrl)
#define kr_extstatus KREG_IDX(EXTStatus)
#define kr_gpio_clear KREG_IDX(GPIOClear)
#define kr_gpio_mask KREG_IDX(GPIOMask)
#define kr_gpio_out KREG_IDX(GPIOOut)
#define kr_gpio_status KREG_IDX(GPIOStatus)
#define kr_hwdiagctrl KREG_IDX(HwDiagCtrl)
#define kr_debugportval KREG_IDX(DebugPortValueReg)
#define kr_fmask KREG_IDX(feature_mask)
#define kr_act_fmask KREG_IDX(active_feature_mask)
#define kr_hwerrclear KREG_IDX(HwErrClear)
#define kr_hwerrmask KREG_IDX(HwErrMask)
#define kr_hwerrstatus KREG_IDX(HwErrStatus)
#define kr_intclear KREG_IDX(IntClear)
#define kr_intmask KREG_IDX(IntMask)
#define kr_intredirect KREG_IDX(IntRedirect0)
#define kr_intstatus KREG_IDX(IntStatus)
#define kr_pagealign KREG_IDX(PageAlign)
#define kr_rcvavailtimeout KREG_IDX(RcvAvailTimeOut0)
#define kr_rcvctrl KREG_IDX(RcvCtrl) /* Common, but chip also has per-port */
#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_revision KREG_IDX(Revision)
#define kr_scratch KREG_IDX(Scratch)
#define kr_sendbuffererror KREG_IDX(SendBufErr0) /* and base for 1 and 2 */
#define kr_sendcheckmask KREG_IDX(SendCheckMask0) /* and 1, 2 */
#define kr_sendctrl KREG_IDX(SendCtrl)
#define kr_sendgrhcheckmask KREG_IDX(SendGRHCheckMask0) /* and 1, 2 */
#define kr_sendibpktmask KREG_IDX(SendIBPacketMask0) /* and 1, 2 */
#define kr_sendpioavailaddr KREG_IDX(SendBufAvailAddr)
#define kr_sendpiobufbase KREG_IDX(SendBufBase)
#define kr_sendpiobufcnt KREG_IDX(SendBufCnt)
#define kr_sendpiosize KREG_IDX(SendBufSize)
#define kr_sendregbase KREG_IDX(SendRegBase)
#define kr_sendbufavail0 KREG_IDX(SendBufAvail0)
#define kr_userregbase KREG_IDX(UserRegBase)
#define kr_intgranted KREG_IDX(Int_Granted)
#define kr_vecclr_wo_int KREG_IDX(vec_clr_without_int)
#define kr_intblocked KREG_IDX(IntBlocked)
#define kr_r_access KREG_IDX(SPC_JTAG_ACCESS_REG)

/*
 * per-port kernel registers.  Access only with qib_read_kreg_port()
 * or qib_write_kreg_port()
 */
#define krp_errclear KREG_IBPORT_IDX(ErrClear)
#define krp_errmask KREG_IBPORT_IDX(ErrMask)
#define krp_errstatus KREG_IBPORT_IDX(ErrStatus)
#define krp_highprio_0 KREG_IBPORT_IDX(HighPriority0)
#define krp_highprio_limit KREG_IBPORT_IDX(HighPriorityLimit)
#define krp_hrtbt_guid KREG_IBPORT_IDX(HRTBT_GUID)
#define krp_ib_pcsconfig KREG_IBPORT_IDX(IBPCSConfig)
#define krp_ibcctrl_a KREG_IBPORT_IDX(IBCCtrlA)
#define krp_ibcctrl_b KREG_IBPORT_IDX(IBCCtrlB)
#define krp_ibcctrl_c KREG_IBPORT_IDX(IBCCtrlC)
#define krp_ibcstatus_a KREG_IBPORT_IDX(IBCStatusA)
#define krp_ibcstatus_b KREG_IBPORT_IDX(IBCStatusB)
#define krp_txestatus KREG_IBPORT_IDX(TXEStatus)
#define krp_lowprio_0 KREG_IBPORT_IDX(LowPriority0)
#define krp_ncmodectrl KREG_IBPORT_IDX(IBNCModeCtrl)
#define krp_partitionkey KREG_IBPORT_IDX(RcvPartitionKey)
#define krp_psinterval KREG_IBPORT_IDX(PSInterval)
#define krp_psstart KREG_IBPORT_IDX(PSStart)
#define krp_psstat KREG_IBPORT_IDX(PSStat)
#define krp_rcvbthqp KREG_IBPORT_IDX(RcvBTHQP)
#define krp_rcvctrl KREG_IBPORT_IDX(RcvCtrl)
#define krp_rcvpktledcnt KREG_IBPORT_IDX(RcvPktLEDCnt)
#define krp_rcvqpmaptable KREG_IBPORT_IDX(RcvQPMapTableA)
#define krp_rxcreditvl0 KREG_IBPORT_IDX(RxCreditVL0)
#define krp_rxcreditvl15 (KREG_IBPORT_IDX(RxCreditVL0)+15)
#define krp_sendcheckcontrol KREG_IBPORT_IDX(SendCheckControl)
#define krp_sendctrl KREG_IBPORT_IDX(SendCtrl)
#define krp_senddmabase KREG_IBPORT_IDX(SendDmaBase)
#define krp_senddmabufmask0 KREG_IBPORT_IDX(SendDmaBufMask0)
#define krp_senddmabufmask1 (KREG_IBPORT_IDX(SendDmaBufMask0) + 1)
#define krp_senddmabufmask2 (KREG_IBPORT_IDX(SendDmaBufMask0) + 2)
#define krp_senddmabuf_use0 KREG_IBPORT_IDX(SendDmaBufUsed0)
#define krp_senddmabuf_use1 (KREG_IBPORT_IDX(SendDmaBufUsed0) + 1)
#define krp_senddmabuf_use2 (KREG_IBPORT_IDX(SendDmaBufUsed0) + 2)
#define krp_senddmadesccnt KREG_IBPORT_IDX(SendDmaDescCnt)
#define krp_senddmahead KREG_IBPORT_IDX(SendDmaHead)
#define krp_senddmaheadaddr KREG_IBPORT_IDX(SendDmaHeadAddr)
#define krp_senddmaidlecnt KREG_IBPORT_IDX(SendDmaIdleCnt)
#define krp_senddmalengen KREG_IBPORT_IDX(SendDmaLenGen)
#define krp_senddmaprioritythld KREG_IBPORT_IDX(SendDmaPriorityThld)
#define krp_senddmareloadcnt KREG_IBPORT_IDX(SendDmaReloadCnt)
#define krp_senddmastatus KREG_IBPORT_IDX(SendDmaStatus)
#define krp_senddmatail KREG_IBPORT_IDX(SendDmaTail)
#define krp_sendhdrsymptom KREG_IBPORT_IDX(SendHdrErrSymptom)
#define krp_sendslid KREG_IBPORT_IDX(SendIBSLIDAssign)
#define krp_sendslidmask KREG_IBPORT_IDX(SendIBSLIDMask)
#define krp_ibsdtestiftx KREG_IBPORT_IDX(IB_SDTEST_IF_TX)
#define krp_adapt_dis_timer KREG_IBPORT_IDX(ADAPT_DISABLE_TIMER_THRESHOLD)
#define krp_tx_deemph_override KREG_IBPORT_IDX(IBSD_TX_DEEMPHASIS_OVERRIDE)
#define krp_serdesctrl KREG_IBPORT_IDX(IBSerdesCtrl)

/*
 * Per-context kernel registers.  Access only with qib_read_kreg_ctxt()
 * or qib_write_kreg_ctxt()
 */
#define krc_rcvhdraddr KREG_IDX(RcvHdrAddr0)
#define krc_rcvhdrtailaddr KREG_IDX(RcvHdrTailAddr0)

/*
 * TID Flow table, per context.  Reduces
 * number of hdrq updates to one per flow (or on errors).
 * context 0 and 1 share same memory, but have distinct
 * addresses.  Since for now, we never use expected sends
 * on kernel contexts, we don't worry about that (we initialize
 * those entries for ctxt 0/1 on driver load twice, for example).
 */
#define NUM_TIDFLOWS_CTXT 0x20 /* 0x20 per context; have to hardcode */
#define ur_rcvflowtable (KREG_IDX(RcvTIDFlowTable0) - KREG_IDX(RcvHdrTail0))

/* these are the error bits in the tid flows, and are W1C */
#define TIDFLOW_ERRBITS  ( \
        (SYM_MASK(RcvTIDFlowTable0, GenMismatch) << \
        SYM_LSB(RcvTIDFlowTable0, GenMismatch)) | \
        (SYM_MASK(RcvTIDFlowTable0, SeqMismatch) << \
        SYM_LSB(RcvTIDFlowTable0, SeqMismatch)))

/* Most (not all) Counters are per-IBport.
 * Requires LBIntCnt is at offset 0 in the group
 */
#define CREG_IDX(regname) \
((QIB_7322_##regname##_0_OFFS - QIB_7322_LBIntCnt_OFFS) / sizeof(u64))

#define crp_badformat CREG_IDX(RxVersionErrCnt)
#define crp_err_rlen CREG_IDX(RxLenErrCnt)
#define crp_erricrc CREG_IDX(RxICRCErrCnt)
#define crp_errlink CREG_IDX(RxLinkMalformCnt)
#define crp_errlpcrc CREG_IDX(RxLPCRCErrCnt)
#define crp_errpkey CREG_IDX(RxPKeyMismatchCnt)
#define crp_errvcrc CREG_IDX(RxVCRCErrCnt)
#define crp_excessbufferovfl CREG_IDX(ExcessBufferOvflCnt)
#define crp_iblinkdown CREG_IDX(IBLinkDownedCnt)
#define crp_iblinkerrrecov CREG_IDX(IBLinkErrRecoveryCnt)
#define crp_ibstatuschange CREG_IDX(IBStatusChangeCnt)
#define crp_ibsymbolerr CREG_IDX(IBSymbolErrCnt)
#define crp_invalidrlen CREG_IDX(RxMaxMinLenErrCnt)
#define crp_locallinkintegrityerr CREG_IDX(LocalLinkIntegrityErrCnt)
#define crp_pktrcv CREG_IDX(RxDataPktCnt)
#define crp_pktrcvflowctrl CREG_IDX(RxFlowPktCnt)
#define crp_pktsend CREG_IDX(TxDataPktCnt)
#define crp_pktsendflow CREG_IDX(TxFlowPktCnt)
#define crp_psrcvdatacount CREG_IDX(PSRcvDataCount)
#define crp_psrcvpktscount CREG_IDX(PSRcvPktsCount)
#define crp_psxmitdatacount CREG_IDX(PSXmitDataCount)
#define crp_psxmitpktscount CREG_IDX(PSXmitPktsCount)
#define crp_psxmitwaitcount CREG_IDX(PSXmitWaitCount)
#define crp_rcvebp CREG_IDX(RxEBPCnt)
#define crp_rcvflowctrlviol CREG_IDX(RxFlowCtrlViolCnt)
#define crp_rcvovfl CREG_IDX(RxBufOvflCnt)
#define crp_rxdlidfltr CREG_IDX(RxDlidFltrCnt)
#define crp_rxdroppkt CREG_IDX(RxDroppedPktCnt)
#define crp_rxotherlocalphyerr CREG_IDX(RxOtherLocalPhyErrCnt)
#define crp_rxqpinvalidctxt CREG_IDX(RxQPInvalidContextCnt)
#define crp_rxvlerr CREG_IDX(RxVlErrCnt)
#define crp_sendstall CREG_IDX(TxFlowStallCnt)
#define crp_txdroppedpkt CREG_IDX(TxDroppedPktCnt)
#define crp_txhdrerr CREG_IDX(TxHeadersErrCnt)
#define crp_txlenerr CREG_IDX(TxLenErrCnt)
#define crp_txminmaxlenerr CREG_IDX(TxMaxMinLenErrCnt)
#define crp_txsdmadesc CREG_IDX(TxSDmaDescCnt)
#define crp_txunderrun CREG_IDX(TxUnderrunCnt)
#define crp_txunsupvl CREG_IDX(TxUnsupVLErrCnt)
#define crp_vl15droppedpkt CREG_IDX(RxVL15DroppedPktCnt)
#define crp_wordrcv CREG_IDX(RxDwordCnt)
#define crp_wordsend CREG_IDX(TxDwordCnt)
#define crp_tx_creditstalls CREG_IDX(TxCreditUpToDateTimeOut)

/* these are the (few) counters that are not port-specific */
#define CREG_DEVIDX(regname) ((QIB_7322_##regname##_OFFS - \
                        QIB_7322_LBIntCnt_OFFS) / sizeof(u64))
#define cr_base_egrovfl CREG_DEVIDX(RxP0HdrEgrOvflCnt)
#define cr_lbint CREG_DEVIDX(LBIntCnt)
#define cr_lbstall CREG_DEVIDX(LBFlowStallCnt)
#define cr_pcieretrydiag CREG_DEVIDX(PcieRetryBufDiagQwordCnt)
#define cr_rxtidflowdrop CREG_DEVIDX(RxTidFlowDropCnt)
#define cr_tidfull CREG_DEVIDX(RxTIDFullErrCnt)
#define cr_tidinvalid CREG_DEVIDX(RxTIDValidErrCnt)

/* no chip register for # of IB ports supported, so define */
#define NUM_IB_PORTS 2

/* 1 VL15 buffer per hardware IB port, no register for this, so define */
#define NUM_VL15_BUFS NUM_IB_PORTS

/*
 * context 0 and 1 are special, and there is no chip register that
 * defines this value, so we have to define it here.
 * These are all allocated to either 0 or 1 for single port
 * hardware configuration, otherwise each gets half
 */
#define KCTXT0_EGRCNT 2048

/* values for vl and port fields in PBC, 7322-specific */
#define PBC_PORT_SEL_LSB 26
#define PBC_PORT_SEL_RMASK 1
#define PBC_VL_NUM_LSB 27
#define PBC_VL_NUM_RMASK 7
#define PBC_7322_VL15_SEND (1ULL << 63) /* pbc; VL15, no credit check */
#define PBC_7322_VL15_SEND_CTRL (1ULL << 31) /* control version of same */

static u8 ib_rate_to_delay[IB_RATE_120_GBPS + 1] = {
        [IB_RATE_2_5_GBPS] = 16,
        [IB_RATE_5_GBPS] = 8,
        [IB_RATE_10_GBPS] = 4,
        [IB_RATE_20_GBPS] = 2,
        [IB_RATE_30_GBPS] = 2,
        [IB_RATE_40_GBPS] = 1
};

#define IBA7322_LINKSPEED_SHIFT SYM_LSB(IBCStatusA_0, LinkSpeedActive)
#define IBA7322_LINKWIDTH_SHIFT SYM_LSB(IBCStatusA_0, LinkWidthActive)

/* link training states, from IBC */
#define IB_7322_LT_STATE_DISABLED        0x00
#define IB_7322_LT_STATE_LINKUP          0x01
#define IB_7322_LT_STATE_POLLACTIVE      0x02
#define IB_7322_LT_STATE_POLLQUIET       0x03
#define IB_7322_LT_STATE_SLEEPDELAY      0x04
#define IB_7322_LT_STATE_SLEEPQUIET      0x05
#define IB_7322_LT_STATE_CFGDEBOUNCE     0x08
#define IB_7322_LT_STATE_CFGRCVFCFG      0x09
#define IB_7322_LT_STATE_CFGWAITRMT      0x0a
#define IB_7322_LT_STATE_CFGIDLE         0x0b
#define IB_7322_LT_STATE_RECOVERRETRAIN  0x0c
#define IB_7322_LT_STATE_TXREVLANES      0x0d
#define IB_7322_LT_STATE_RECOVERWAITRMT  0x0e
#define IB_7322_LT_STATE_RECOVERIDLE     0x0f
#define IB_7322_LT_STATE_CFGENH          0x10
#define IB_7322_LT_STATE_CFGTEST         0x11
#define IB_7322_LT_STATE_CFGWAITRMTTEST  0x12
#define IB_7322_LT_STATE_CFGWAITENH      0x13

/* link state machine states from IBC */
#define IB_7322_L_STATE_DOWN             0x0
#define IB_7322_L_STATE_INIT             0x1
#define IB_7322_L_STATE_ARM              0x2
#define IB_7322_L_STATE_ACTIVE           0x3
#define IB_7322_L_STATE_ACT_DEFER        0x4

static const u8 qib_7322_physportstate[0x20] = {
        [IB_7322_LT_STATE_DISABLED] = IB_PHYSPORTSTATE_DISABLED,
        [IB_7322_LT_STATE_LINKUP] = IB_PHYSPORTSTATE_LINKUP,
        [IB_7322_LT_STATE_POLLACTIVE] = IB_PHYSPORTSTATE_POLL,
        [IB_7322_LT_STATE_POLLQUIET] = IB_PHYSPORTSTATE_POLL,
        [IB_7322_LT_STATE_SLEEPDELAY] = IB_PHYSPORTSTATE_SLEEP,
        [IB_7322_LT_STATE_SLEEPQUIET] = IB_PHYSPORTSTATE_SLEEP,
        [IB_7322_LT_STATE_CFGDEBOUNCE] = IB_PHYSPORTSTATE_CFG_TRAIN,
        [IB_7322_LT_STATE_CFGRCVFCFG] =
                IB_PHYSPORTSTATE_CFG_TRAIN,
        [IB_7322_LT_STATE_CFGWAITRMT] =
                IB_PHYSPORTSTATE_CFG_TRAIN,
        [IB_7322_LT_STATE_CFGIDLE] = IB_PHYSPORTSTATE_CFG_IDLE,
        [IB_7322_LT_STATE_RECOVERRETRAIN] =
                IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
        [IB_7322_LT_STATE_RECOVERWAITRMT] =
                IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
        [IB_7322_LT_STATE_RECOVERIDLE] =
                IB_PHYSPORTSTATE_LINK_ERR_RECOVER,
        [IB_7322_LT_STATE_CFGENH] = IB_PHYSPORTSTATE_CFG_ENH,
        [IB_7322_LT_STATE_CFGTEST] = IB_PHYSPORTSTATE_CFG_TRAIN,
        [IB_7322_LT_STATE_CFGWAITRMTTEST] =
                IB_PHYSPORTSTATE_CFG_TRAIN,
        [IB_7322_LT_STATE_CFGWAITENH] =
                IB_PHYSPORTSTATE_CFG_WAIT_ENH,
        [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;
        spinlock_t rcvmod_lock; /* protect rcvctrl shadow changes */
        spinlock_t gpio_lock; /* RMW of shadows/regs for ExtCtrl and GPIO */
        u64 main_int_mask;      /* clear bits which have dedicated handlers */
        u64 int_enable_mask;  /* for per port interrupts in single port mode */
        u64 errormask;
        u64 hwerrmask;
        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... */
        u32 ncntrs;
        u32 nportcntrs;
        u32 cntrnamelen;
        u32 portcntrnamelen;
        u32 numctxts;
        u32 rcvegrcnt;
        u32 updthresh; /* current AvailUpdThld */
        u32 updthresh_dflt; /* default AvailUpdThld */
        u32 r1;
        int irq;
        u32 num_msix_entries;
        u32 sdmabufcnt;
        u32 lastbuf_for_pio;
        u32 stay_in_freeze;
        u32 recovery_ports_initted;
        struct msix_entry *msix_entries;
        void  **msix_arg;
        unsigned long *sendchkenable;
        unsigned long *sendgrhchk;
        unsigned long *sendibchk;
        u32 rcvavail_timeout[18];
        char emsgbuf[128]; /* for device error interrupt msg buffer */
};

/* Table of entries in "human readable" form Tx Emphasis. */
struct txdds_ent {
        u8 amp;
        u8 pre;
        u8 main;
        u8 post;
};

struct vendor_txdds_ent {
        u8 oui[QSFP_VOUI_LEN];
        u8 *partnum;
        struct txdds_ent sdr;
        struct txdds_ent ddr;
        struct txdds_ent qdr;
};

static void write_tx_serdes_param(struct qib_pportdata *, struct txdds_ent *);

#define TXDDS_TABLE_SZ 16 /* number of entries per speed in onchip table */
#define TXDDS_EXTRA_SZ 13 /* number of extra tx settings entries */
#define TXDDS_MFG_SZ 2    /* number of mfg tx settings entries */
#define SERDES_CHANS 4 /* yes, it's obvious, but one less magic number */

#define H1_FORCE_VAL 8
#define H1_FORCE_QME 1 /*  may be overridden via setup_txselect() */
#define H1_FORCE_QMH 7 /*  may be overridden via setup_txselect() */

/* The static and dynamic registers are paired, and the pairs indexed by spd */
#define krp_static_adapt_dis(spd) (KREG_IBPORT_IDX(ADAPT_DISABLE_STATIC_SDR) \
        + ((spd) * 2))

#define QDR_DFE_DISABLE_DELAY 4000 /* msec after LINKUP */
#define QDR_STATIC_ADAPT_DOWN 0xf0f0f0f0ULL /* link down, H1-H4 QDR adapts */
#define QDR_STATIC_ADAPT_DOWN_R1 0ULL /* r1 link down, H1-H4 QDR adapts */
#define QDR_STATIC_ADAPT_INIT 0xffffffffffULL /* up, disable H0,H1-8, LE */
#define QDR_STATIC_ADAPT_INIT_R1 0xf0ffffffffULL /* r1 up, disable H0,H1-8 */

struct qib_chippport_specific {
        u64 __iomem *kpregbase;
        u64 __iomem *cpregbase;
        u64 *portcntrs;
        struct qib_pportdata *ppd;
        wait_queue_head_t autoneg_wait;
        struct delayed_work autoneg_work;
        struct delayed_work ipg_work;
        struct timer_list chase_timer;
        /*
         * 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 iblnkdownsnap;
        u64 iblnkdowndelta;
        u64 ibmalfdelta;
        u64 ibmalfsnap;
        u64 ibcctrl_a; /* krp_ibcctrl_a shadow */
        u64 ibcctrl_b; /* krp_ibcctrl_b shadow */
        u64 qdr_dfe_time;
        u64 chase_end;
        u32 autoneg_tries;
        u32 recovery_init;
        u32 qdr_dfe_on;
        u32 qdr_reforce;
        /*
         * Per-bay per-channel rcv QMH H1 values and Tx values for QDR.
         * entry zero is unused, to simplify indexing
         */
        u8 h1_val;
        u8 no_eep;  /* txselect table index to use if no qsfp info */
        u8 ipg_tries;
        u8 ibmalfusesnap;
        struct qib_qsfp_data qsfp_data;
        char epmsgbuf[192]; /* for port error interrupt msg buffer */
};

static struct {
        const char *name;
        irq_handler_t handler;
        int lsb;
        int port; /* 0 if not port-specific, else port # */
} irq_table[] = {
        { QIB_DRV_NAME, qib_7322intr, -1, 0 },
        { QIB_DRV_NAME " (buf avail)", qib_7322bufavail,
                SYM_LSB(IntStatus, SendBufAvail), 0 },
        { QIB_DRV_NAME " (sdma 0)", sdma_intr,
                SYM_LSB(IntStatus, SDmaInt_0), 1 },
        { QIB_DRV_NAME " (sdma 1)", sdma_intr,
                SYM_LSB(IntStatus, SDmaInt_1), 2 },
        { QIB_DRV_NAME " (sdmaI 0)", sdma_idle_intr,
                SYM_LSB(IntStatus, SDmaIdleInt_0), 1 },
        { QIB_DRV_NAME " (sdmaI 1)", sdma_idle_intr,
                SYM_LSB(IntStatus, SDmaIdleInt_1), 2 },
        { QIB_DRV_NAME " (sdmaP 0)", sdma_progress_intr,
                SYM_LSB(IntStatus, SDmaProgressInt_0), 1 },
        { QIB_DRV_NAME " (sdmaP 1)", sdma_progress_intr,
                SYM_LSB(IntStatus, SDmaProgressInt_1), 2 },
        { QIB_DRV_NAME " (sdmaC 0)", sdma_cleanup_intr,
                SYM_LSB(IntStatus, SDmaCleanupDone_0), 1 },
        { QIB_DRV_NAME " (sdmaC 1)", sdma_cleanup_intr,
                SYM_LSB(IntStatus, SDmaCleanupDone_1), 2 },
};

/* ibcctrl bits */
#define QLOGIC_IB_IBCC_LINKINITCMD_DISABLE 1
/* cycle through TS1/TS2 till OK */
#define QLOGIC_IB_IBCC_LINKINITCMD_POLL 2
/* wait for TS1, then go on */
#define QLOGIC_IB_IBCC_LINKINITCMD_SLEEP 3
#define QLOGIC_IB_IBCC_LINKINITCMD_SHIFT 16

#define QLOGIC_IB_IBCC_LINKCMD_DOWN 1           /* move to 0x11 */
#define QLOGIC_IB_IBCC_LINKCMD_ARMED 2          /* move to 0x21 */
#define QLOGIC_IB_IBCC_LINKCMD_ACTIVE 3 /* move to 0x31 */

#define BLOB_7322_IBCHG 0x101

static inline void qib_write_kreg(const struct qib_devdata *dd,
                                  const u32 regno, u64 value);
static inline u32 qib_read_kreg32(const struct qib_devdata *, const u32);
static void write_7322_initregs(struct qib_devdata *);
static void write_7322_init_portregs(struct qib_pportdata *);
static void setup_7322_link_recovery(struct qib_pportdata *, u32);
static void check_7322_rxe_status(struct qib_pportdata *);
static u32 __iomem *qib_7322_getsendbuf(struct qib_pportdata *, u64, u32 *);

/**
 * 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;
        return readl(regno + (u64 __iomem *)(
                (dd->ureg_align * ctxt) + (dd->userbase ?
                 (char __iomem *)dd->userbase :
                 (char __iomem *)dd->kregbase + dd->uregbase)));
}

/**
 * qib_read_ureg - read 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 u64 qib_read_ureg(const struct qib_devdata *dd,
                                enum qib_ureg regno, int ctxt)
{

        if (!dd->kregbase || !(dd->flags & QIB_PRESENT))
                return 0;
        return readq(regno + (u64 __iomem *)(
                (dd->ureg_align * ctxt) + (dd->userbase ?
                 (char __iomem *)dd->userbase :
                 (char __iomem *)dd->kregbase + dd->uregbase)));
}

/**
 * qib_write_ureg - write 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 u32 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 u32 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 u32 regno, u64 value)
{
        if (dd->kregbase && (dd->flags & QIB_PRESENT))
                writeq(value, &dd->kregbase[regno]);
}

/*
 * not many sanity checks for the port-specific kernel register routines,
 * since they are only used when it's known to be safe.
*/
static inline u64 qib_read_kreg_port(const struct qib_pportdata *ppd,
                                     const u16 regno)
{
        if (!ppd->cpspec->kpregbase || !(ppd->dd->flags & QIB_PRESENT))
                return 0ULL;
        return readq(&ppd->cpspec->kpregbase[regno]);
}

static inline void qib_write_kreg_port(const struct qib_pportdata *ppd,
                                       const u16 regno, u64 value)
{
        if (ppd->cpspec && ppd->dd && ppd->cpspec->kpregbase &&
            (ppd->dd->flags & QIB_PRESENT))
                writeq(value, &ppd->cpspec->kpregbase[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 u64 read_7322_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_7322_creg32(const struct qib_devdata *dd, u16 regno)
{
        if (!dd->cspec->cregbase || !(dd->flags & QIB_PRESENT))
                return 0;
        return readl(&dd->cspec->cregbase[regno]);


}

static inline void write_7322_creg_port(const struct qib_pportdata *ppd,
                                        u16 regno, u64 value)
{
        if (ppd->cpspec && ppd->cpspec->cpregbase &&
            (ppd->dd->flags & QIB_PRESENT))
                writeq(value, &ppd->cpspec->cpregbase[regno]);
}

static inline u64 read_7322_creg_port(const struct qib_pportdata *ppd,
                                      u16 regno)
{
        if (!ppd->cpspec || !ppd->cpspec->cpregbase ||
            !(ppd->dd->flags & QIB_PRESENT))
                return 0;
        return readq(&ppd->cpspec->cpregbase[regno]);
}

static inline u32 read_7322_creg32_port(const struct qib_pportdata *ppd,
                                        u16 regno)
{
        if (!ppd->cpspec || !ppd->cpspec->cpregbase ||
            !(ppd->dd->flags & QIB_PRESENT))
                return 0;
        return readl(&ppd->cpspec->cpregbase[regno]);
}

/* bits in Control register */
#define QLOGIC_IB_C_RESET SYM_MASK(Control, SyncReset)
#define QLOGIC_IB_C_SDMAFETCHPRIOEN SYM_MASK(Control, SDmaDescFetchPriorityEn)

/* bits in general interrupt regs */
#define QIB_I_RCVURG_LSB SYM_LSB(IntMask, RcvUrg0IntMask)
#define QIB_I_RCVURG_RMASK MASK_ACROSS(0, 17)
#define QIB_I_RCVURG_MASK (QIB_I_RCVURG_RMASK << QIB_I_RCVURG_LSB)
#define QIB_I_RCVAVAIL_LSB SYM_LSB(IntMask, RcvAvail0IntMask)
#define QIB_I_RCVAVAIL_RMASK MASK_ACROSS(0, 17)
#define QIB_I_RCVAVAIL_MASK (QIB_I_RCVAVAIL_RMASK << QIB_I_RCVAVAIL_LSB)
#define QIB_I_C_ERROR INT_MASK(Err)

#define QIB_I_SPIOSENT (INT_MASK_P(SendDone, 0) | INT_MASK_P(SendDone, 1))
#define QIB_I_SPIOBUFAVAIL INT_MASK(SendBufAvail)
#define QIB_I_GPIO INT_MASK(AssertGPIO)
#define QIB_I_P_SDMAINT(pidx) \
        (INT_MASK_P(SDma, pidx) | INT_MASK_P(SDmaIdle, pidx) | \
         INT_MASK_P(SDmaProgress, pidx) | \
         INT_MASK_PM(SDmaCleanupDone, pidx))

/* Interrupt bits that are "per port" */
#define QIB_I_P_BITSEXTANT(pidx) \
        (INT_MASK_P(Err, pidx) | INT_MASK_P(SendDone, pidx) | \
        INT_MASK_P(SDma, pidx) | INT_MASK_P(SDmaIdle, pidx) | \
        INT_MASK_P(SDmaProgress, pidx) | \
        INT_MASK_PM(SDmaCleanupDone, pidx))

/* Interrupt bits that are common to a device */
/* currently unused: QIB_I_SPIOSENT */
#define QIB_I_C_BITSEXTANT \
        (QIB_I_RCVURG_MASK | QIB_I_RCVAVAIL_MASK | \
        QIB_I_SPIOSENT | \
        QIB_I_C_ERROR | QIB_I_SPIOBUFAVAIL | QIB_I_GPIO)

#define QIB_I_BITSEXTANT (QIB_I_C_BITSEXTANT | \
        QIB_I_P_BITSEXTANT(0) | QIB_I_P_BITSEXTANT(1))

/*
 * Error bits that are "per port".
 */
#define QIB_E_P_IBSTATUSCHANGED ERR_MASK_N(IBStatusChanged)
#define QIB_E_P_SHDR ERR_MASK_N(SHeadersErr)
#define QIB_E_P_VL15_BUF_MISUSE ERR_MASK_N(VL15BufMisuseErr)
#define QIB_E_P_SND_BUF_MISUSE ERR_MASK_N(SendBufMisuseErr)
#define QIB_E_P_SUNSUPVL ERR_MASK_N(SendUnsupportedVLErr)
#define QIB_E_P_SUNEXP_PKTNUM ERR_MASK_N(SendUnexpectedPktNumErr)
#define QIB_E_P_SDROP_DATA ERR_MASK_N(SendDroppedDataPktErr)
#define QIB_E_P_SDROP_SMP ERR_MASK_N(SendDroppedSmpPktErr)
#define QIB_E_P_SPKTLEN ERR_MASK_N(SendPktLenErr)
#define QIB_E_P_SUNDERRUN ERR_MASK_N(SendUnderRunErr)
#define QIB_E_P_SMAXPKTLEN ERR_MASK_N(SendMaxPktLenErr)
#define QIB_E_P_SMINPKTLEN ERR_MASK_N(SendMinPktLenErr)
#define QIB_E_P_RIBLOSTLINK ERR_MASK_N(RcvIBLostLinkErr)
#define QIB_E_P_RHDR ERR_MASK_N(RcvHdrErr)
#define QIB_E_P_RHDRLEN ERR_MASK_N(RcvHdrLenErr)
#define QIB_E_P_RBADTID ERR_MASK_N(RcvBadTidErr)
#define QIB_E_P_RBADVERSION ERR_MASK_N(RcvBadVersionErr)
#define QIB_E_P_RIBFLOW ERR_MASK_N(RcvIBFlowErr)
#define QIB_E_P_REBP ERR_MASK_N(RcvEBPErr)
#define QIB_E_P_RUNSUPVL ERR_MASK_N(RcvUnsupportedVLErr)
#define QIB_E_P_RUNEXPCHAR ERR_MASK_N(RcvUnexpectedCharErr)
#define QIB_E_P_RSHORTPKTLEN ERR_MASK_N(RcvShortPktLenErr)
#define QIB_E_P_RLONGPKTLEN ERR_MASK_N(RcvLongPktLenErr)
#define QIB_E_P_RMAXPKTLEN ERR_MASK_N(RcvMaxPktLenErr)
#define QIB_E_P_RMINPKTLEN ERR_MASK_N(RcvMinPktLenErr)
#define QIB_E_P_RICRC ERR_MASK_N(RcvICRCErr)
#define QIB_E_P_RVCRC ERR_MASK_N(RcvVCRCErr)
#define QIB_E_P_RFORMATERR ERR_MASK_N(RcvFormatErr)

#define QIB_E_P_SDMA1STDESC ERR_MASK_N(SDma1stDescErr)
#define QIB_E_P_SDMABASE ERR_MASK_N(SDmaBaseErr)
#define QIB_E_P_SDMADESCADDRMISALIGN ERR_MASK_N(SDmaDescAddrMisalignErr)
#define QIB_E_P_SDMADWEN ERR_MASK_N(SDmaDwEnErr)
#define QIB_E_P_SDMAGENMISMATCH ERR_MASK_N(SDmaGenMismatchErr)
#define QIB_E_P_SDMAHALT ERR_MASK_N(SDmaHaltErr)
#define QIB_E_P_SDMAMISSINGDW ERR_MASK_N(SDmaMissingDwErr)
#define QIB_E_P_SDMAOUTOFBOUND ERR_MASK_N(SDmaOutOfBoundErr)
#define QIB_E_P_SDMARPYTAG ERR_MASK_N(SDmaRpyTagErr)
#define QIB_E_P_SDMATAILOUTOFBOUND ERR_MASK_N(SDmaTailOutOfBoundErr)
#define QIB_E_P_SDMAUNEXPDATA ERR_MASK_N(SDmaUnexpDataErr)

/* Error bits that are common to a device */
#define QIB_E_RESET ERR_MASK(ResetNegated)
#define QIB_E_HARDWARE ERR_MASK(HardwareErr)
#define QIB_E_INVALIDADDR ERR_MASK(InvalidAddrErr)


/*
 * Per chip (rather than per-port) errors.  Most either do
 * nothing but trigger a print (because they self-recover, or
 * always occur in tandem with other errors that handle the
 * issue), or because they indicate errors with no recovery,
 * but we want to know that they happened.
 */
#define QIB_E_SBUF_VL15_MISUSE ERR_MASK(SBufVL15MisUseErr)
#define QIB_E_BADEEP ERR_MASK(InvalidEEPCmd)
#define QIB_E_VLMISMATCH ERR_MASK(SendVLMismatchErr)
#define QIB_E_ARMLAUNCH ERR_MASK(SendArmLaunchErr)
#define QIB_E_SPCLTRIG ERR_MASK(SendSpecialTriggerErr)
#define QIB_E_RRCVHDRFULL ERR_MASK(RcvHdrFullErr)
#define QIB_E_RRCVEGRFULL ERR_MASK(RcvEgrFullErr)
#define QIB_E_RCVCTXTSHARE ERR_MASK(RcvContextShareErr)

/* SDMA chip errors (not per port)
 * QIB_E_SDMA_BUF_DUP needs no special handling, because we will also get
 * the SDMAHALT error immediately, so we just print the dup error via the
 * E_AUTO mechanism.  This is true of most of the per-port fatal errors
 * as well, but since this is port-independent, by definition, it's
 * handled a bit differently.  SDMA_VL15 and SDMA_WRONG_PORT are per
 * packet send errors, and so are handled in the same manner as other
 * per-packet errors.
 */
#define QIB_E_SDMA_VL15 ERR_MASK(SDmaVL15Err)
#define QIB_E_SDMA_WRONG_PORT ERR_MASK(SDmaWrongPortErr)
#define QIB_E_SDMA_BUF_DUP ERR_MASK(SDmaBufMaskDuplicateErr)

/*
 * Below functionally equivalent to legacy QLOGIC_IB_E_PKTERRS
 * it is used to print "common" packet errors.
 */
#define QIB_E_P_PKTERRS (QIB_E_P_SPKTLEN |\
        QIB_E_P_SDROP_DATA | QIB_E_P_RVCRC |\
        QIB_E_P_RICRC | QIB_E_P_RSHORTPKTLEN |\
        QIB_E_P_VL15_BUF_MISUSE | QIB_E_P_SHDR | \
        QIB_E_P_REBP)

/* Error Bits that Packet-related (Receive, per-port) */
#define QIB_E_P_RPKTERRS (\
        QIB_E_P_RHDRLEN | QIB_E_P_RBADTID | \
        QIB_E_P_RBADVERSION | QIB_E_P_RHDR | \
        QIB_E_P_RLONGPKTLEN | QIB_E_P_RSHORTPKTLEN |\
        QIB_E_P_RMAXPKTLEN | QIB_E_P_RMINPKTLEN | \
        QIB_E_P_RFORMATERR | QIB_E_P_RUNSUPVL | \
        QIB_E_P_RUNEXPCHAR | QIB_E_P_RIBFLOW | QIB_E_P_REBP)

/*
 * Error bits that are Send-related (per port)
 * (ARMLAUNCH excluded from E_SPKTERRS because it gets special handling).
 * All of these potentially need to have a buffer disarmed
 */
#define QIB_E_P_SPKTERRS (\
        QIB_E_P_SUNEXP_PKTNUM |\
        QIB_E_P_SDROP_DATA | QIB_E_P_SDROP_SMP |\
        QIB_E_P_SMAXPKTLEN |\
        QIB_E_P_VL15_BUF_MISUSE | QIB_E_P_SHDR | \
        QIB_E_P_SMINPKTLEN | QIB_E_P_SPKTLEN | \
        QIB_E_P_SND_BUF_MISUSE | QIB_E_P_SUNSUPVL)

#define QIB_E_SPKTERRS ( \
                QIB_E_SBUF_VL15_MISUSE | QIB_E_VLMISMATCH | \
                ERR_MASK_N(SendUnsupportedVLErr) |                      \
                QIB_E_SPCLTRIG | QIB_E_SDMA_VL15 | QIB_E_SDMA_WRONG_PORT)

#define QIB_E_P_SDMAERRS ( \
        QIB_E_P_SDMAHALT | \
        QIB_E_P_SDMADESCADDRMISALIGN | \
        QIB_E_P_SDMAUNEXPDATA | \
        QIB_E_P_SDMAMISSINGDW | \
        QIB_E_P_SDMADWEN | \
        QIB_E_P_SDMARPYTAG | \
        QIB_E_P_SDMA1STDESC | \
        QIB_E_P_SDMABASE | \
        QIB_E_P_SDMATAILOUTOFBOUND | \
        QIB_E_P_SDMAOUTOFBOUND | \
        QIB_E_P_SDMAGENMISMATCH)

/*
 * This sets some bits more than once, but makes it more obvious which
 * bits are not handled under other categories, and the repeat definition
 * is not a problem.
 */
#define QIB_E_P_BITSEXTANT ( \
        QIB_E_P_SPKTERRS | QIB_E_P_PKTERRS | QIB_E_P_RPKTERRS | \
        QIB_E_P_RIBLOSTLINK | QIB_E_P_IBSTATUSCHANGED | \
        QIB_E_P_SND_BUF_MISUSE | QIB_E_P_SUNDERRUN | \
        QIB_E_P_SHDR | QIB_E_P_VL15_BUF_MISUSE | QIB_E_P_SDMAERRS \
        )

/*
 * 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.
 * All of these are "per port", so renamed:
 */
#define QIB_E_P_LINK_PKTERRS (\
        QIB_E_P_SDROP_DATA | QIB_E_P_SDROP_SMP |\
        QIB_E_P_SMINPKTLEN | QIB_E_P_SPKTLEN |\
        QIB_E_P_RSHORTPKTLEN | QIB_E_P_RMINPKTLEN |\
        QIB_E_P_RUNEXPCHAR)

/*
 * This sets some bits more than once, but makes it more obvious which
 * bits are not handled under other categories (such as QIB_E_SPKTERRS),
 * and the repeat definition is not a problem.
 */
#define QIB_E_C_BITSEXTANT (\
        QIB_E_HARDWARE | QIB_E_INVALIDADDR | QIB_E_BADEEP |\
        QIB_E_ARMLAUNCH | QIB_E_VLMISMATCH | QIB_E_RRCVHDRFULL |\
        QIB_E_RRCVEGRFULL | QIB_E_RESET | QIB_E_SBUF_VL15_MISUSE)

/* Likewise Neuter E_SPKT_ERRS_IGNORE */
#define E_SPKT_ERRS_IGNORE 0

#define QIB_EXTS_MEMBIST_DISABLED \
        SYM_MASK(EXTStatus, MemBISTDisabled)
#define QIB_EXTS_MEMBIST_ENDTEST \
        SYM_MASK(EXTStatus, MemBISTEndTest)

#define QIB_E_SPIOARMLAUNCH \
        ERR_MASK(SendArmLaunchErr)

#define IBA7322_IBCC_LINKINITCMD_MASK SYM_RMASK(IBCCtrlA_0, LinkInitCmd)
#define IBA7322_IBCC_LINKCMD_SHIFT SYM_LSB(IBCCtrlA_0, LinkCmd)

/*
 * IBTA_1_2 is set when multiple speeds are enabled (normal),
 * and also if forced QDR (only QDR enabled).  It's enabled for the
 * forced QDR case so that scrambling will be enabled by the TS3
 * exchange, when supported by both sides of the link.
 */
#define IBA7322_IBC_IBTA_1_2_MASK SYM_MASK(IBCCtrlB_0, IB_ENHANCED_MODE)
#define IBA7322_IBC_MAX_SPEED_MASK SYM_MASK(IBCCtrlB_0, SD_SPEED)
#define IBA7322_IBC_SPEED_QDR SYM_MASK(IBCCtrlB_0, SD_SPEED_QDR)
#define IBA7322_IBC_SPEED_DDR SYM_MASK(IBCCtrlB_0, SD_SPEED_DDR)
#define IBA7322_IBC_SPEED_SDR SYM_MASK(IBCCtrlB_0, SD_SPEED_SDR)
#define IBA7322_IBC_SPEED_MASK (SYM_MASK(IBCCtrlB_0, SD_SPEED_SDR) | \
        SYM_MASK(IBCCtrlB_0, SD_SPEED_DDR) | SYM_MASK(IBCCtrlB_0, SD_SPEED_QDR))
#define IBA7322_IBC_SPEED_LSB SYM_LSB(IBCCtrlB_0, SD_SPEED_SDR)

#define IBA7322_LEDBLINK_OFF_SHIFT SYM_LSB(RcvPktLEDCnt_0, OFFperiod)
#define IBA7322_LEDBLINK_ON_SHIFT SYM_LSB(RcvPktLEDCnt_0, ONperiod)

#define IBA7322_IBC_WIDTH_AUTONEG SYM_MASK(IBCCtrlB_0, IB_NUM_CHANNELS)
#define IBA7322_IBC_WIDTH_4X_ONLY (1<<SYM_LSB(IBCCtrlB_0, IB_NUM_CHANNELS))
#define IBA7322_IBC_WIDTH_1X_ONLY (0<<SYM_LSB(IBCCtrlB_0, IB_NUM_CHANNELS))

#define IBA7322_IBC_RXPOL_MASK SYM_MASK(IBCCtrlB_0, IB_POLARITY_REV_SUPP)
#define IBA7322_IBC_RXPOL_LSB SYM_LSB(IBCCtrlB_0, IB_POLARITY_REV_SUPP)
#define IBA7322_IBC_HRTBT_MASK (SYM_MASK(IBCCtrlB_0, HRTBT_AUTO) | \
        SYM_MASK(IBCCtrlB_0, HRTBT_ENB))
#define IBA7322_IBC_HRTBT_RMASK (IBA7322_IBC_HRTBT_MASK >> \
        SYM_LSB(IBCCtrlB_0, HRTBT_ENB))
#define IBA7322_IBC_HRTBT_LSB SYM_LSB(IBCCtrlB_0, HRTBT_ENB)

#define IBA7322_REDIRECT_VEC_PER_REG 12

#define IBA7322_SENDCHK_PKEY SYM_MASK(SendCheckControl_0, PKey_En)
#define IBA7322_SENDCHK_BTHQP SYM_MASK(SendCheckControl_0, BTHQP_En)
#define IBA7322_SENDCHK_SLID SYM_MASK(SendCheckControl_0, SLID_En)
#define IBA7322_SENDCHK_RAW_IPV6 SYM_MASK(SendCheckControl_0, RawIPV6_En)
#define IBA7322_SENDCHK_MINSZ SYM_MASK(SendCheckControl_0, PacketTooSmall_En)

#define AUTONEG_TRIES 3 /* sequential retries to negotiate DDR */

#define HWE_AUTO(fldname) { .mask = SYM_MASK(HwErrMask, fldname##Mask), \
        .msg = #fldname , .sz = sizeof(#fldname) }
#define HWE_AUTO_P(fldname, port) { .mask = SYM_MASK(HwErrMask, \
        fldname##Mask##_##port), .msg = #fldname , .sz = sizeof(#fldname) }
static const struct qib_hwerror_msgs qib_7322_hwerror_msgs[] = {
        HWE_AUTO_P(IBSerdesPClkNotDetect, 1),
        HWE_AUTO_P(IBSerdesPClkNotDetect, 0),
        HWE_AUTO(PCIESerdesPClkNotDetect),
        HWE_AUTO(PowerOnBISTFailed),
        HWE_AUTO(TempsenseTholdReached),
        HWE_AUTO(MemoryErr),
        HWE_AUTO(PCIeBusParityErr),
        HWE_AUTO(PcieCplTimeout),
        HWE_AUTO(PciePoisonedTLP),
        HWE_AUTO_P(SDmaMemReadErr, 1),
        HWE_AUTO_P(SDmaMemReadErr, 0),
        HWE_AUTO_P(IBCBusFromSPCParityErr, 1),
        HWE_AUTO_P(IBCBusToSPCParityErr, 1),
        HWE_AUTO_P(IBCBusFromSPCParityErr, 0),
        HWE_AUTO(statusValidNoEop),
        HWE_AUTO(LATriggered),
        { .mask = 0, .sz = 0 }
};

#define E_AUTO(fldname) { .mask = SYM_MASK(ErrMask, fldname##Mask), \
        .msg = #fldname, .sz = sizeof(#fldname) }
#define E_P_AUTO(fldname) { .mask = SYM_MASK(ErrMask_0, fldname##Mask), \
        .msg = #fldname, .sz = sizeof(#fldname) }
static const struct qib_hwerror_msgs qib_7322error_msgs[] = {
        E_AUTO(RcvEgrFullErr),
        E_AUTO(RcvHdrFullErr),
        E_AUTO(ResetNegated),
        E_AUTO(HardwareErr),
        E_AUTO(InvalidAddrErr),
        E_AUTO(SDmaVL15Err),
        E_AUTO(SBufVL15MisUseErr),
        E_AUTO(InvalidEEPCmd),
        E_AUTO(RcvContextShareErr),
        E_AUTO(SendVLMismatchErr),
        E_AUTO(SendArmLaunchErr),
        E_AUTO(SendSpecialTriggerErr),
        E_AUTO(SDmaWrongPortErr),
        E_AUTO(SDmaBufMaskDuplicateErr),
        { .mask = 0, .sz = 0 }
};

static const struct  qib_hwerror_msgs qib_7322p_error_msgs[] = {
        E_P_AUTO(IBStatusChanged),
        E_P_AUTO(SHeadersErr),
        E_P_AUTO(VL15BufMisuseErr),
        /*
         * SDmaHaltErr is not really an error, make it clearer;
         */
        {.mask = SYM_MASK(ErrMask_0, SDmaHaltErrMask), .msg = "SDmaHalted",
                .sz = 11},
        E_P_AUTO(SDmaDescAddrMisalignErr),
        E_P_AUTO(SDmaUnexpDataErr),
        E_P_AUTO(SDmaMissingDwErr),
        E_P_AUTO(SDmaDwEnErr),
        E_P_AUTO(SDmaRpyTagErr),
        E_P_AUTO(SDma1stDescErr),
        E_P_AUTO(SDmaBaseErr),
        E_P_AUTO(SDmaTailOutOfBoundErr),
        E_P_AUTO(SDmaOutOfBoundErr),
        E_P_AUTO(SDmaGenMismatchErr),
        E_P_AUTO(SendBufMisuseErr),
        E_P_AUTO(SendUnsupportedVLErr),
        E_P_AUTO(SendUnexpectedPktNumErr),
        E_P_AUTO(SendDroppedDataPktErr),
        E_P_AUTO(SendDroppedSmpPktErr),
        E_P_AUTO(SendPktLenErr),
        E_P_AUTO(SendUnderRunErr),
        E_P_AUTO(SendMaxPktLenErr),
        E_P_AUTO(SendMinPktLenErr),
        E_P_AUTO(RcvIBLostLinkErr),
        E_P_AUTO(RcvHdrErr),
        E_P_AUTO(RcvHdrLenErr),
        E_P_AUTO(RcvBadTidErr),
        E_P_AUTO(RcvBadVersionErr),
        E_P_AUTO(RcvIBFlowErr),
        E_P_AUTO(RcvEBPErr),
        E_P_AUTO(RcvUnsupportedVLErr),
        E_P_AUTO(RcvUnexpectedCharErr),
        E_P_AUTO(RcvShortPktLenErr),
        E_P_AUTO(RcvLongPktLenErr),
        E_P_AUTO(RcvMaxPktLenErr),
        E_P_AUTO(RcvMinPktLenErr),
        E_P_AUTO(RcvICRCErr),
        E_P_AUTO(RcvVCRCErr),
        E_P_AUTO(RcvFormatErr),
        { .mask = 0, .sz = 0 }
};

/*
 * Below generates "auto-message" for interrupts not specific to any port or
 * context
 */
#define INTR_AUTO(fldname) { .mask = SYM_MASK(IntMask, fldname##Mask), \
        .msg = #fldname, .sz = sizeof(#fldname) }
/* Below generates "auto-message" for interrupts specific to a port */
#define INTR_AUTO_P(fldname) { .mask = MASK_ACROSS(\
        SYM_LSB(IntMask, fldname##Mask##_0), \
        SYM_LSB(IntMask, fldname##Mask##_1)), \
        .msg = #fldname "_P", .sz = sizeof(#fldname "_P") }
/* For some reason, the SerDesTrimDone bits are reversed */
#define INTR_AUTO_PI(fldname) { .mask = MASK_ACROSS(\
        SYM_LSB(IntMask, fldname##Mask##_1), \
        SYM_LSB(IntMask, fldname##Mask##_0)), \
        .msg = #fldname "_P", .sz = sizeof(#fldname "_P") }
/*
 * Below generates "auto-message" for interrupts specific to a context,
 * with ctxt-number appended
 */
#define INTR_AUTO_C(fldname) { .mask = MASK_ACROSS(\
        SYM_LSB(IntMask, fldname##0IntMask), \
        SYM_LSB(IntMask, fldname##17IntMask)), \
        .msg = #fldname "_C", .sz = sizeof(#fldname "_C") }

static const struct  qib_hwerror_msgs qib_7322_intr_msgs[] = {
        INTR_AUTO_P(SDmaInt),
        INTR_AUTO_P(SDmaProgressInt),
        INTR_AUTO_P(SDmaIdleInt),
        INTR_AUTO_P(SDmaCleanupDone),
        INTR_AUTO_C(RcvUrg),
        INTR_AUTO_P(ErrInt),
        INTR_AUTO(ErrInt),      /* non-port-specific errs */
        INTR_AUTO(AssertGPIOInt),
        INTR_AUTO_P(SendDoneInt),
        INTR_AUTO(SendBufAvailInt),
        INTR_AUTO_C(RcvAvail),
        { .mask = 0, .sz = 0 }
};

#define TXSYMPTOM_AUTO_P(fldname) \
        { .mask = SYM_MASK(SendHdrErrSymptom_0, fldname), \
        .msg = #fldname, .sz = sizeof(#fldname) }
static const struct  qib_hwerror_msgs hdrchk_msgs[] = {
        TXSYMPTOM_AUTO_P(NonKeyPacket),
        TXSYMPTOM_AUTO_P(GRHFail),
        TXSYMPTOM_AUTO_P(PkeyFail),
        TXSYMPTOM_AUTO_P(QPFail),
        TXSYMPTOM_AUTO_P(SLIDFail),
        TXSYMPTOM_AUTO_P(RawIPV6),
        TXSYMPTOM_AUTO_P(PacketTooSmall),
        { .mask = 0, .sz = 0 }
};

#define IBA7322_HDRHEAD_PKTINT_SHIFT 32 /* interrupt cnt in upper 32 bits */

/*
 * Called when we might have an error that is specific to a particular
 * PIO buffer, and may need to cancel that buffer, so it can be re-used,
 * because we don't need to force the update of pioavail
 */
static void qib_disarm_7322_senderrbufs(struct qib_pportdata *ppd)
{
        struct qib_devdata *dd = ppd->dd;
        u32 i;
        int any;
        u32 piobcnt = dd->piobcnt2k + dd->piobcnt4k + NUM_VL15_BUFS;
        u32 regcnt = (piobcnt + BITS_PER_LONG - 1) / BITS_PER_LONG;
        unsigned long sbuf[4];

        /*
         * It's possible that sendbuffererror could have bits set; might
         * have already done this as a result of hardware error handling.
         */
        any = 0;
        for (i = 0; i < regcnt; ++i) {
                sbuf[i] = qib_read_kreg64(dd, kr_sendbuffererror + i);
                if (sbuf[i]) {
                        any = 1;
                        qib_write_kreg(dd, kr_sendbuffererror + i, sbuf[i]);
                }
        }

        if (any)
                qib_disarm_piobufs_set(dd, sbuf, piobcnt);
}

/* No txe_recover yet, if ever */

/* No decode__errors yet */
static void err_decode(char *msg, size_t len, u64 errs,
                       const struct qib_hwerror_msgs *msp)
{
        u64 these, lmask;
        int took, multi, n = 0;

        while (errs && msp && msp->mask) {
                multi = (msp->mask & (msp->mask - 1));
                while (errs & msp->mask) {
                        these = (errs & msp->mask);
                        lmask = (these & (these - 1)) ^ these;
                        if (len) {
                                if (n++) {
                                        /* separate the strings */
                                        *msg++ = ',';
                                        len--;
                                }
                                BUG_ON(!msp->sz);
                                /* msp->sz counts the nul */
                                took = min_t(size_t, msp->sz - (size_t)1, len);
                                memcpy(msg,  msp->msg, took);
                                len -= took;
                                msg += took;
                                if (len)
                                        *msg = '\0';
                        }
                        errs &= ~lmask;
                        if (len && multi) {
                                /* More than one bit this mask */
                                int idx = -1;

                                while (lmask & msp->mask) {
                                        ++idx;
                                        lmask >>= 1;
                                }
                                took = scnprintf(msg, len, "_%d", idx);
                                len -= took;
                                msg += took;
                        }
                }
                ++msp;
        }
        /* If some bits are left, show in hex. */
        if (len && errs)
                snprintf(msg, len, "%sMORE:%llX", n ? "," : "",
                        (unsigned long long) errs);
}

/* only called if r1 set */
static void flush_fifo(struct qib_pportdata *ppd)
{
        struct qib_devdata *dd = ppd->dd;
        u32 __iomem *piobuf;
        u32 bufn;
        u32 *hdr;
        u64 pbc;
        const unsigned hdrwords = 7;
        static struct qib_ib_header ibhdr = {
                .lrh[0] = cpu_to_be16(0xF000 | QIB_LRH_BTH),
                .lrh[1] = IB_LID_PERMISSIVE,
                .lrh[2] = cpu_to_be16(hdrwords + SIZE_OF_CRC),
                .lrh[3] = IB_LID_PERMISSIVE,
                .u.oth.bth[0] = cpu_to_be32(
                        (IB_OPCODE_UD_SEND_ONLY << 24) | QIB_DEFAULT_P_KEY),
                .u.oth.bth[1] = cpu_to_be32(0),
                .u.oth.bth[2] = cpu_to_be32(0),
                .u.oth.u.ud.deth[0] = cpu_to_be32(0),
                .u.oth.u.ud.deth[1] = cpu_to_be32(0),
        };

        /*
         * Send a dummy VL15 packet to flush the launch FIFO.
         * This will not actually be sent since the TxeBypassIbc bit is set.
         */
        pbc = PBC_7322_VL15_SEND |
                (((u64)ppd->hw_pidx) << (PBC_PORT_SEL_LSB + 32)) |
                (hdrwords + SIZE_OF_CRC);
        piobuf = qib_7322_getsendbuf(ppd, pbc, &bufn);
        if (!piobuf)
                return;
        writeq(pbc, piobuf);
        hdr = (u32 *) &ibhdr;
        if (dd->flags & QIB_PIO_FLUSH_WC) {
                qib_flush_wc();
                qib_pio_copy(piobuf + 2, hdr, hdrwords - 1);
                qib_flush_wc();
                __raw_writel(hdr[hdrwords - 1], piobuf + hdrwords + 1);
                qib_flush_wc();
        } else
                qib_pio_copy(piobuf + 2, hdr, hdrwords);
        qib_sendbuf_done(dd, bufn);
}

/*
 * This is called with interrupts disabled and sdma_lock held.
 */
static void qib_7322_sdma_sendctrl(struct qib_pportdata *ppd, unsigned op)
{
        struct qib_devdata *dd = ppd->dd;
        u64 set_sendctrl = 0;
        u64 clr_sendctrl = 0;

        if (op & QIB_SDMA_SENDCTRL_OP_ENABLE)
                set_sendctrl |= SYM_MASK(SendCtrl_0, SDmaEnable);
        else
                clr_sendctrl |= SYM_MASK(SendCtrl_0, SDmaEnable);

        if (op & QIB_SDMA_SENDCTRL_OP_INTENABLE)
                set_sendctrl |= SYM_MASK(SendCtrl_0, SDmaIntEnable);
        else
                clr_sendctrl |= SYM_MASK(SendCtrl_0, SDmaIntEnable);

        if (op & QIB_SDMA_SENDCTRL_OP_HALT)
                set_sendctrl |= SYM_MASK(SendCtrl_0, SDmaHalt);
        else
                clr_sendctrl |= SYM_MASK(SendCtrl_0, SDmaHalt);

        if (op & QIB_SDMA_SENDCTRL_OP_DRAIN)
                set_sendctrl |= SYM_MASK(SendCtrl_0, TxeBypassIbc) |
                                SYM_MASK(SendCtrl_0, TxeAbortIbc) |
                                SYM_MASK(SendCtrl_0, TxeDrainRmFifo);
        else
                clr_sendctrl |= SYM_MASK(SendCtrl_0, TxeBypassIbc) |
                                SYM_MASK(SendCtrl_0, TxeAbortIbc) |
                                SYM_MASK(SendCtrl_0, TxeDrainRmFifo);

        spin_lock(&dd->sendctrl_lock);

        /* If we are draining everything, block sends first */
        if (op & QIB_SDMA_SENDCTRL_OP_DRAIN) {
                ppd->p_sendctrl &= ~SYM_MASK(SendCtrl_0, SendEnable);
                qib_write_kreg_port(ppd, krp_sendctrl, ppd->p_sendctrl);
                qib_write_kreg(dd, kr_scratch, 0);
        }

        ppd->p_sendctrl |= set_sendctrl;
        ppd->p_sendctrl &= ~clr_sendctrl;

        if (op & QIB_SDMA_SENDCTRL_OP_CLEANUP)
                qib_write_kreg_port(ppd, krp_sendctrl,
                                    ppd->p_sendctrl |
                                    SYM_MASK(SendCtrl_0, SDmaCleanup));
        else
                qib_write_kreg_port(ppd, krp_sendctrl, ppd->p_sendctrl);
        qib_write_kreg(dd, kr_scratch, 0);

        if (op & QIB_SDMA_SENDCTRL_OP_DRAIN) {
                ppd->p_sendctrl |= SYM_MASK(SendCtrl_0, SendEnable);
                qib_write_kreg_port(ppd, krp_sendctrl, ppd->p_sendctrl);
                qib_write_kreg(dd, kr_scratch, 0);
        }

        spin_unlock(&dd->sendctrl_lock);

        if ((op & QIB_SDMA_SENDCTRL_OP_DRAIN) && ppd->dd->cspec->r1)
                flush_fifo(ppd);
}

static void qib_7322_sdma_hw_clean_up(struct qib_pportdata *ppd)
{
        __qib_sdma_process_event(ppd, qib_sdma_event_e50_hw_cleaned);
}

static void qib_sdma_7322_setlengen(struct qib_pportdata *ppd)
{
        /*
         * Set SendDmaLenGen and clear and set
         * the MSB of the generation count to enable generation checking
         * and load the internal generation counter.
         */
        qib_write_kreg_port(ppd, krp_senddmalengen, ppd->sdma_descq_cnt);
        qib_write_kreg_port(ppd, krp_senddmalengen,
                            ppd->sdma_descq_cnt |
                            (1ULL << QIB_7322_SendDmaLenGen_0_Generation_MSB));
}

/*
 * Must be called with sdma_lock held, or before init finished.
 */
static void qib_sdma_update_7322_tail(struct qib_pportdata *ppd, u16 tail)
{
        /* Commit writes to memory and advance the tail on the chip */
        wmb();
        ppd->sdma_descq_tail = tail;
        qib_write_kreg_port(ppd, krp_senddmatail, tail);
}

/*
 * This is called with interrupts disabled and sdma_lock held.
 */
static void qib_7322_sdma_hw_start_up(struct qib_pportdata *ppd)
{
        /*
         * Drain all FIFOs.
         * The hardware doesn't require this but we do it so that verbs
         * and user applications don't wait for link active to send stale
         * data.
         */
        sendctrl_7322_mod(ppd, QIB_SENDCTRL_FLUSH);

        qib_sdma_7322_setlengen(ppd);
        qib_sdma_update_7322_tail(ppd, 0); /* Set SendDmaTail */
        ppd->sdma_head_dma[0] = 0;
        qib_7322_sdma_sendctrl(ppd,
                ppd->sdma_state.current_op | QIB_SDMA_SENDCTRL_OP_CLEANUP);
}

#define DISABLES_SDMA ( \
        QIB_E_P_SDMAHALT | \
        QIB_E_P_SDMADESCADDRMISALIGN | \
        QIB_E_P_SDMAMISSINGDW | \
        QIB_E_P_SDMADWEN | \
        QIB_E_P_SDMARPYTAG | \
        QIB_E_P_SDMA1STDESC | \
        QIB_E_P_SDMABASE | \
        QIB_E_P_SDMATAILOUTOFBOUND | \
        QIB_E_P_SDMAOUTOFBOUND | \
        QIB_E_P_SDMAGENMISMATCH)

static void sdma_7322_p_errors(struct qib_pportdata *ppd, u64 errs)
{
        unsigned long flags;
        struct qib_devdata *dd = ppd->dd;

        errs &= QIB_E_P_SDMAERRS;

        if (errs & QIB_E_P_SDMAUNEXPDATA)
                qib_dev_err(dd, "IB%u:%u SDmaUnexpData\n", dd->unit,
                            ppd->port);

        spin_lock_irqsave(&ppd->sdma_lock, flags);

        switch (ppd->sdma_state.current_state) {
        case qib_sdma_state_s00_hw_down:
                break;

        case qib_sdma_state_s10_hw_start_up_wait:
                if (errs & QIB_E_P_SDMAHALT)
                        __qib_sdma_process_event(ppd,
                                qib_sdma_event_e20_hw_started);
                break;

        case qib_sdma_state_s20_idle:
                break;

        case qib_sdma_state_s30_sw_clean_up_wait:
                break;

        case qib_sdma_state_s40_hw_clean_up_wait:
                if (errs & QIB_E_P_SDMAHALT)
                        __qib_sdma_process_event(ppd,
                                qib_sdma_event_e50_hw_cleaned);
                break;

        case qib_sdma_state_s50_hw_halt_wait:
                if (errs & QIB_E_P_SDMAHALT)
                        __qib_sdma_process_event(ppd,
                                qib_sdma_event_e60_hw_halted);
                break;

        case qib_sdma_state_s99_running:
                __qib_sdma_process_event(ppd, qib_sdma_event_e7322_err_halted);
                __qib_sdma_process_event(ppd, qib_sdma_event_e60_hw_halted);
                break;
        }

        spin_unlock_irqrestore(&ppd->sdma_lock, flags);
}

/*
 * handle per-device errors (not per-port errors)
 */
static noinline void handle_7322_errors(struct qib_devdata *dd)
{
        char *msg;
        u64 iserr = 0;
        u64 errs;
        u64 mask;
        int log_idx;

        qib_stats.sps_errints++;
        errs = qib_read_kreg64(dd, kr_errstatus);
        if (!errs) {
                qib_devinfo(dd->pcidev, "device error interrupt, "
                         "but no error bits set!\n");
                goto done;
        }

        /* don't report errors that are masked */
        errs &= dd->cspec->errormask;
        msg = dd->cspec->emsgbuf;

        /* do these first, they are most important */
        if (errs & QIB_E_HARDWARE) {
                *msg = '\0';
                qib_7322_handle_hwerrors(dd, msg, sizeof dd->cspec->emsgbuf);
        } else
                for (log_idx = 0; log_idx < QIB_EEP_LOG_CNT; ++log_idx)
                        if (errs & dd->eep_st_masks[log_idx].errs_to_log)
                                qib_inc_eeprom_err(dd, log_idx, 1);

        if (errs & QIB_E_SPKTERRS) {
                qib_disarm_7322_senderrbufs(dd->pport);
                qib_stats.sps_txerrs++;
        } else if (errs & QIB_E_INVALIDADDR)
                qib_stats.sps_txerrs++;
        else if (errs & QIB_E_ARMLAUNCH) {
                qib_stats.sps_txerrs++;
                qib_disarm_7322_senderrbufs(dd->pport);
        }
        qib_write_kreg(dd, kr_errclear, errs);

        /*
         * The ones we mask off are handled specially below
         * or above.  Also mask SDMADISABLED by default as it
         * is too chatty.
         */
        mask = QIB_E_HARDWARE;
        *msg = '\0';

        err_decode(msg, sizeof dd->cspec->emsgbuf, errs & ~mask,
                   qib_7322error_msgs);

        /*
         * Getting reset is a tragedy for all ports. Mark the device
         * _and_ the ports as "offline" in way meaningful to each.
         */
        if (errs & QIB_E_RESET) {
                int pidx;

                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;
                for (pidx = 0; pidx < dd->num_pports; ++pidx)
                        if (dd->pport[pidx].link_speed_supported)
                                *dd->pport[pidx].statusp &= ~QIB_STATUS_IB_CONF;
        }

        if (*msg && iserr)
                qib_dev_err(dd, "%s error\n", msg);

        /*
         * 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;
}

static void qib_error_tasklet(unsigned long data)
{
        struct qib_devdata *dd = (struct qib_devdata *)data;

        handle_7322_errors(dd);
        qib_write_kreg(dd, kr_errmask, dd->cspec->errormask);
}

static void reenable_chase(unsigned long opaque)
{
        struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;

        ppd->cpspec->chase_timer.expires = 0;
        qib_set_ib_7322_lstate(ppd, QLOGIC_IB_IBCC_LINKCMD_DOWN,
                QLOGIC_IB_IBCC_LINKINITCMD_POLL);
}

static void disable_chase(struct qib_pportdata *ppd, u64 tnow, u8 ibclt)
{
        ppd->cpspec->chase_end = 0;

        if (!qib_chase)
                return;

        qib_set_ib_7322_lstate(ppd, QLOGIC_IB_IBCC_LINKCMD_DOWN,
                QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
        ppd->cpspec->chase_timer.expires = jiffies + QIB_CHASE_DIS_TIME;
        add_timer(&ppd->cpspec->chase_timer);
}

static void handle_serdes_issues(struct qib_pportdata *ppd, u64 ibcst)
{
        u8 ibclt;
        u64 tnow;

        ibclt = (u8)SYM_FIELD(ibcst, IBCStatusA_0, LinkTrainingState);

        /*
         * Detect and handle the state chase issue, where we can
         * get stuck if we are unlucky on timing on both sides of
         * the link.   If we are, we disable, set a timer, and
         * then re-enable.
         */
        switch (ibclt) {
        case IB_7322_LT_STATE_CFGRCVFCFG:
        case IB_7322_LT_STATE_CFGWAITRMT:
        case IB_7322_LT_STATE_TXREVLANES:
        case IB_7322_LT_STATE_CFGENH:
                tnow = get_jiffies_64();
                if (ppd->cpspec->chase_end &&
                     time_after64(tnow, ppd->cpspec->chase_end))
                        disable_chase(ppd, tnow, ibclt);
                else if (!ppd->cpspec->chase_end)
                        ppd->cpspec->chase_end = tnow + QIB_CHASE_TIME;
                break;
        default:
                ppd->cpspec->chase_end = 0;
                break;
        }

        if (((ibclt >= IB_7322_LT_STATE_CFGTEST &&
              ibclt <= IB_7322_LT_STATE_CFGWAITENH) ||
             ibclt == IB_7322_LT_STATE_LINKUP) &&
            (ibcst & SYM_MASK(IBCStatusA_0, LinkSpeedQDR))) {
                force_h1(ppd);
                ppd->cpspec->qdr_reforce = 1;
                if (!ppd->dd->cspec->r1)
                        serdes_7322_los_enable(ppd, 0);
        } else if (ppd->cpspec->qdr_reforce &&
                (ibcst & SYM_MASK(IBCStatusA_0, LinkSpeedQDR)) &&
                 (ibclt == IB_7322_LT_STATE_CFGENH ||
                ibclt == IB_7322_LT_STATE_CFGIDLE ||
                ibclt == IB_7322_LT_STATE_LINKUP))
                force_h1(ppd);

        if ((IS_QMH(ppd->dd) || IS_QME(ppd->dd)) &&
            ppd->link_speed_enabled == QIB_IB_QDR &&
            (ibclt == IB_7322_LT_STATE_CFGTEST ||
             ibclt == IB_7322_LT_STATE_CFGENH ||
             (ibclt >= IB_7322_LT_STATE_POLLACTIVE &&
              ibclt <= IB_7322_LT_STATE_SLEEPQUIET)))
                adj_tx_serdes(ppd);

        if (ibclt != IB_7322_LT_STATE_LINKUP) {
                u8 ltstate = qib_7322_phys_portstate(ibcst);
                u8 pibclt = (u8)SYM_FIELD(ppd->lastibcstat, IBCStatusA_0,
                                          LinkTrainingState);
                if (!ppd->dd->cspec->r1 &&
                    pibclt == IB_7322_LT_STATE_LINKUP &&
                    ltstate != IB_PHYSPORTSTATE_LINK_ERR_RECOVER &&
                    ltstate != IB_PHYSPORTSTATE_RECOVERY_RETRAIN &&
                    ltstate != IB_PHYSPORTSTATE_RECOVERY_WAITRMT &&
                    ltstate != IB_PHYSPORTSTATE_RECOVERY_IDLE)
                        /* If the link went down (but no into recovery,
                         * turn LOS back on */
                        serdes_7322_los_enable(ppd, 1);
                if (!ppd->cpspec->qdr_dfe_on &&
                    ibclt <= IB_7322_LT_STATE_SLEEPQUIET) {
                        ppd->cpspec->qdr_dfe_on = 1;
                        ppd->cpspec->qdr_dfe_time = 0;
                        /* On link down, reenable QDR adaptation */
                        qib_write_kreg_port(ppd, krp_static_adapt_dis(2),
                                            ppd->dd->cspec->r1 ?
                                            QDR_STATIC_ADAPT_DOWN_R1 :
                                            QDR_STATIC_ADAPT_DOWN);
                        printk(KERN_INFO QIB_DRV_NAME
                                " IB%u:%u re-enabled QDR adaptation "
                                "ibclt %x\n", ppd->dd->unit, ppd->port, ibclt);
                }
        }
}

static int qib_7322_set_ib_cfg(struct qib_pportdata *, int, u32);

/*
 * This is per-pport error handling.
 * will likely get it's own MSIx interrupt (one for each port,
 * although just a single handler).
 */
static noinline void handle_7322_p_errors(struct qib_pportdata *ppd)
{
        char *msg;
        u64 ignore_this_time = 0, iserr = 0, errs, fmask;
        struct qib_devdata *dd = ppd->dd;

        /* do this as soon as possible */
        fmask = qib_read_kreg64(dd, kr_act_fmask);
        if (!fmask)
                check_7322_rxe_status(ppd);

        errs = qib_read_kreg_port(ppd, krp_errstatus);
        if (!errs)
                qib_devinfo(dd->pcidev,
                         "Port%d error interrupt, but no error bits set!\n",
                         ppd->port);
        if (!fmask)
                errs &= ~QIB_E_P_IBSTATUSCHANGED;
        if (!errs)
                goto done;

        msg = ppd->cpspec->epmsgbuf;
        *msg = '\0';

        if (errs & ~QIB_E_P_BITSEXTANT) {
                err_decode(msg, sizeof ppd->cpspec->epmsgbuf,
                           errs & ~QIB_E_P_BITSEXTANT, qib_7322p_error_msgs);
                if (!*msg)
                        snprintf(msg, sizeof ppd->cpspec->epmsgbuf,
                                 "no others");
                qib_dev_porterr(dd, ppd->port, "error interrupt with unknown"
                                " errors 0x%016Lx set (and %s)\n",
                                (errs & ~QIB_E_P_BITSEXTANT), msg);
                *msg = '\0';
        }

        if (errs & QIB_E_P_SHDR) {
                u64 symptom;

                /* determine cause, then write to clear */
                symptom = qib_read_kreg_port(ppd, krp_sendhdrsymptom);
                qib_write_kreg_port(ppd, krp_sendhdrsymptom, 0);
                err_decode(msg, sizeof ppd->cpspec->epmsgbuf, symptom,
                           hdrchk_msgs);
                *msg = '\0';
                /* senderrbuf cleared in SPKTERRS below */
        }

        if (errs & QIB_E_P_SPKTERRS) {
                if ((errs & QIB_E_P_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
                         */
                        err_decode(msg, sizeof ppd->cpspec->epmsgbuf,
                                   (errs & QIB_E_P_LINK_PKTERRS),
                                   qib_7322p_error_msgs);
                        *msg = '\0';
                        ignore_this_time = errs & QIB_E_P_LINK_PKTERRS;
                }
                qib_disarm_7322_senderrbufs(ppd);
        } else if ((errs & QIB_E_P_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
                 */
                err_decode(msg, sizeof ppd->cpspec->epmsgbuf, errs,
                           qib_7322p_error_msgs);
                ignore_this_time = errs & QIB_E_P_LINK_PKTERRS;
                *msg = '\0';
        }

        qib_write_kreg_port(ppd, krp_errclear, errs);

        errs &= ~ignore_this_time;
        if (!errs)
                goto done;

        if (errs & QIB_E_P_RPKTERRS)
                qib_stats.sps_rcverrs++;
        if (errs & QIB_E_P_SPKTERRS)
                qib_stats.sps_txerrs++;

        iserr = errs & ~(QIB_E_P_RPKTERRS | QIB_E_P_PKTERRS);

        if (errs & QIB_E_P_SDMAERRS)
                sdma_7322_p_errors(ppd, errs);

        if (errs & QIB_E_P_IBSTATUSCHANGED) {
                u64 ibcs;
                u8 ltstate;

                ibcs = qib_read_kreg_port(ppd, krp_ibcstatus_a);
                ltstate = qib_7322_phys_portstate(ibcs);

                if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
                        handle_serdes_issues(ppd, ibcs);
                if (!(ppd->cpspec->ibcctrl_a &
                      SYM_MASK(IBCCtrlA_0, IBStatIntReductionEn))) {
                        /*
                         * We got our interrupt, so init code should be
                         * happy and not try alternatives. Now squelch
                         * other "chatter" from link-negotiation (pre Init)
                         */
                        ppd->cpspec->ibcctrl_a |=
                                SYM_MASK(IBCCtrlA_0, IBStatIntReductionEn);
                        qib_write_kreg_port(ppd, krp_ibcctrl_a,
                                            ppd->cpspec->ibcctrl_a);
                }

                /* Update our picture of width and speed from chip */
                ppd->link_width_active =
                        (ibcs & SYM_MASK(IBCStatusA_0, LinkWidthActive)) ?
                            IB_WIDTH_4X : IB_WIDTH_1X;
                ppd->link_speed_active = (ibcs & SYM_MASK(IBCStatusA_0,
                        LinkSpeedQDR)) ? QIB_IB_QDR : (ibcs &
                          SYM_MASK(IBCStatusA_0, LinkSpeedActive)) ?
                                   QIB_IB_DDR : QIB_IB_SDR;

                if ((ppd->lflags & QIBL_IB_LINK_DISABLED) && ltstate !=
                    IB_PHYSPORTSTATE_DISABLED)
                        qib_set_ib_7322_lstate(ppd, 0,
                               QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
                else
                        /*
                         * 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 (ltstate != IB_PHYSPORTSTATE_LINK_ERR_RECOVER &&
                            ltstate != IB_PHYSPORTSTATE_RECOVERY_RETRAIN &&
                            ltstate != IB_PHYSPORTSTATE_RECOVERY_WAITRMT &&
                            ltstate != IB_PHYSPORTSTATE_RECOVERY_IDLE)
                                qib_handle_e_ibstatuschanged(ppd, ibcs);
        }
        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);
done:
        return;
}

/* enable/disable chip from delivering interrupts */
static void qib_7322_set_intr_state(struct qib_devdata *dd, u32 enable)
{
        if (enable) {
                if (dd->flags & QIB_BADINTR)
                        return;
                qib_write_kreg(dd, kr_intmask, dd->cspec->int_enable_mask);
                /* cause any pending enabled interrupts to be re-delivered */
                qib_write_kreg(dd, kr_intclear, 0ULL);
                if (dd->cspec->num_msix_entries) {
                        /* and same for MSIx */
                        u64 val = qib_read_kreg64(dd, kr_intgranted);
                        if (val)
                                qib_write_kreg(dd, kr_intgranted, val);
                }
        } 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_7322_clear_freeze(struct qib_devdata *dd)
{
        int pidx;

        /* disable error interrupts, to avoid confusion */
        qib_write_kreg(dd, kr_errmask, 0ULL);

        for (pidx = 0; pidx < dd->num_pports; ++pidx)
                if (dd->pport[pidx].link_speed_supported)
                        qib_write_kreg_port(dd->pport + pidx, krp_errmask,
                                            0ULL);

        /* also disable interrupts; errormask is sometimes overwriten */
        qib_7322_set_intr_state(dd, 0);

        /* clear the freeze, and be sure chip saw it */
        qib_write_kreg(dd, kr_control, dd->control);
        qib_read_kreg32(dd, kr_scratch);

        /*
         * 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);
        /* We need to purge per-port errs and reset mask, too */
        for (pidx = 0; pidx < dd->num_pports; ++pidx) {
                if (!dd->pport[pidx].link_speed_supported)
                        continue;
                qib_write_kreg_port(dd->pport + pidx, krp_errclear, ~0Ull);
                qib_write_kreg_port(dd->pport + pidx, krp_errmask, ~0Ull);
        }
        qib_7322_set_intr_state(dd, 1);
}

/* no error handling to speak of */
/**
 * qib_7322_handle_hwerrors - display hardware errors.
 * @dd: the qlogic_ib device
 * @msg: the output buffer
 * @msgl: the size of the output buffer
 *
 * Use same msg buffer as regular errors to avoid excessive stack
 * use.  Most hardware errors are catastrophic, but for right now,
 * we'll print them and continue.  We reuse the same message buffer as
 * qib_handle_errors() to avoid excessive stack usage.
 */
static void qib_7322_handle_hwerrors(struct qib_devdata *dd, char *msg,
                                     size_t msgl)
{
        u64 hwerrs;
        u32 ctrl;
        int isfatal = 0;

        hwerrs = qib_read_kreg64(dd, kr_hwerrstatus);
        if (!hwerrs)
                goto bail;
        if (hwerrs == ~0ULL) {
                qib_dev_err(dd, "Read of hardware error status failed "
                            "(all bits set); ignoring\n");
                goto bail;
        }
        qib_stats.sps_hwerrs++;

        /* Always clear the error status register, except BIST fail */
        qib_write_kreg(dd, kr_hwerrclear, hwerrs &
                       ~HWE_MASK(PowerOnBISTFailed));

        hwerrs &= dd->cspec->hwerrmask;

        /* no EEPROM logging, yet */

        if (hwerrs)
                qib_devinfo(dd->pcidev, "Hardware error: hwerr=0x%llx "
                            "(cleared)\n", (unsigned long long) hwerrs);

        ctrl = qib_read_kreg32(dd, kr_control);
        if ((ctrl & SYM_MASK(Control, FreezeMode)) && !dd->diag_client) {
                /*
                 * No recovery yet...
                 */
                if ((hwerrs & ~HWE_MASK(LATriggered)) ||
                    dd->cspec->stay_in_freeze) {
                        /*
                         * 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
                         * Force link down, so switch knows, and
                         * LEDs are turned off.
                         */
                        if (dd->flags & QIB_INITTED)
                                isfatal = 1;
                } else
                        qib_7322_clear_freeze(dd);
        }

        if (hwerrs & HWE_MASK(PowerOnBISTFailed)) {
                isfatal = 1;
                strlcpy(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);
        }

        err_decode(msg, msgl, hwerrs, qib_7322_hwerror_msgs);

        /* Ignore esoteric PLL failures et al. */

        qib_dev_err(dd, "%s hardware error\n", msg);

        if (isfatal && !dd->diag_client) {
                qib_dev_err(dd, "Fatal Hardware Error, no longer"
                            " usable, SN %.16s\n", dd->serial);
                /*
                 * for /sys status file and user programs to print; if no
                 * trailing brace is copied, we'll know it was truncated.
                 */
                if (dd->freezemsg)
                        snprintf(dd->freezemsg, dd->freezelen,
                                 "{%s}", msg);
                qib_disable_after_error(dd);
        }
bail:;
}

/**
 * qib_7322_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_7322_init_hwerrors(struct qib_devdata *dd)
{
        int pidx;
        u64 extsval;

        extsval = qib_read_kreg64(dd, kr_extstatus);
        if (!(extsval & (QIB_EXTS_MEMBIST_DISABLED |
                         QIB_EXTS_MEMBIST_ENDTEST)))
                qib_dev_err(dd, "MemBIST did not complete!\n");

        /* never clear BIST failure, so reported on each driver load */
        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);
        for (pidx = 0; pidx < dd->num_pports; ++pidx)
                if (dd->pport[pidx].link_speed_supported)
                        qib_write_kreg_port(dd->pport + pidx, krp_errmask,
                                            ~0ULL);
}

/*
 * Disable and enable the armlaunch error.  Used for PIO bandwidth testing
 * on chips that are count-based, rather than trigger-based.  There is no
 * reference counting, but that's also fine, given the intended use.
 * Only chip-specific because it's all register accesses
 */
static void qib_set_7322_armlaunch(struct qib_devdata *dd, u32 enable)
{
        if (enable) {
                qib_write_kreg(dd, kr_errclear, QIB_E_SPIOARMLAUNCH);
                dd->cspec->errormask |= QIB_E_SPIOARMLAUNCH;
        } else
                dd->cspec->errormask &= ~QIB_E_SPIOARMLAUNCH;
        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_7322_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.
                 * Also reset everything that we can, so we start
                 * completely clean when re-enabled (before we
                 * actually issue the disable to the IBC)
                 */
                qib_7322_mini_pcs_reset(ppd);
                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);
                /*
                 * Clear status change interrupt reduction so the
                 * new state is seen.
                 */
                ppd->cpspec->ibcctrl_a &=
                        ~SYM_MASK(IBCCtrlA_0, IBStatIntReductionEn);
        }

        mod_wd = (linkcmd << IBA7322_IBCC_LINKCMD_SHIFT) |
                (linitcmd << QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);

        qib_write_kreg_port(ppd, krp_ibcctrl_a, ppd->cpspec->ibcctrl_a |
                            mod_wd);
        /* write to chip to prevent back-to-back writes of ibc reg */
        qib_write_kreg(dd, kr_scratch, 0);

}

/*
 * The total RCV buffer memory is 64KB, used for both ports, and is
 * in units of 64 bytes (same as IB flow control credit unit).
 * The consumedVL unit in the same registers are in 32 byte units!
 * So, a VL15 packet needs 4.50 IB credits, and 9 rx buffer chunks,
 * and we can therefore allocate just 9 IB credits for 2 VL15 packets
 * in krp_rxcreditvl15, rather than 10.
 */
#define RCV_BUF_UNITSZ 64
#define NUM_RCV_BUF_UNITS(dd) ((64 * 1024) / (RCV_BUF_UNITSZ * dd->num_pports))

static void set_vls(struct qib_pportdata *ppd)
{
        int i, numvls, totcred, cred_vl, vl0extra;
        struct qib_devdata *dd = ppd->dd;
        u64 val;

        numvls = qib_num_vls(ppd->vls_operational);

        /*
         * Set up per-VL credits. Below is kluge based on these assumptions:
         * 1) port is disabled at the time early_init is called.
         * 2) give VL15 17 credits, for two max-plausible packets.
         * 3) Give VL0-N the rest, with any rounding excess used for VL0
         */
        /* 2 VL15 packets @ 288 bytes each (including IB headers) */
        totcred = NUM_RCV_BUF_UNITS(dd);
        cred_vl = (2 * 288 + RCV_BUF_UNITSZ - 1) / RCV_BUF_UNITSZ;
        totcred -= cred_vl;
        qib_write_kreg_port(ppd, krp_rxcreditvl15, (u64) cred_vl);
        cred_vl = totcred / numvls;
        vl0extra = totcred - cred_vl * numvls;
        qib_write_kreg_port(ppd, krp_rxcreditvl0, cred_vl + vl0extra);
        for (i = 1; i < numvls; i++)
                qib_write_kreg_port(ppd, krp_rxcreditvl0 + i, cred_vl);
        for (; i < 8; i++) /* no buffer space for other VLs */
                qib_write_kreg_port(ppd, krp_rxcreditvl0 + i, 0);

        /* Notify IBC that credits need to be recalculated */
        val = qib_read_kreg_port(ppd, krp_ibsdtestiftx);
        val |= SYM_MASK(IB_SDTEST_IF_TX_0, CREDIT_CHANGE);
        qib_write_kreg_port(ppd, krp_ibsdtestiftx, val);
        qib_write_kreg(dd, kr_scratch, 0ULL);
        val &= ~SYM_MASK(IB_SDTEST_IF_TX_0, CREDIT_CHANGE);
        qib_write_kreg_port(ppd, krp_ibsdtestiftx, val);

        for (i = 0; i < numvls; i++)
                val = qib_read_kreg_port(ppd, krp_rxcreditvl0 + i);
        val = qib_read_kreg_port(ppd, krp_rxcreditvl15);

        /* Change the number of operational VLs */
        ppd->cpspec->ibcctrl_a = (ppd->cpspec->ibcctrl_a &
                                ~SYM_MASK(IBCCtrlA_0, NumVLane)) |
                ((u64)(numvls - 1) << SYM_LSB(IBCCtrlA_0, NumVLane));
        qib_write_kreg_port(ppd, krp_ibcctrl_a, ppd->cpspec->ibcctrl_a);
        qib_write_kreg(dd, kr_scratch, 0ULL);
}

/*
 * The code that deals with actual SerDes is in serdes_7322_init().
 * Compared to the code for iba7220, it is minimal.
 */
static int serdes_7322_init(struct qib_pportdata *ppd);

/**
 * qib_7322_bringup_serdes - bring up the serdes
 * @ppd: physical port on the qlogic_ib device
 */
static int qib_7322_bringup_serdes(struct qib_pportdata *ppd)
{
        struct qib_devdata *dd = ppd->dd;
        u64 val, guid, ibc;
        unsigned long flags;
        int ret = 0;

        /*
         * SerDes model not in Pd, but still need to
         * set up much of IBCCtrl and IBCDDRCtrl; move elsewhere
         * eventually.
         */
        /* Put IBC in reset, sends disabled (should be in reset already) */
        ppd->cpspec->ibcctrl_a &= ~SYM_MASK(IBCCtrlA_0, IBLinkEn);
        qib_write_kreg_port(ppd, krp_ibcctrl_a, ppd->cpspec->ibcctrl_a);
        qib_write_kreg(dd, kr_scratch, 0ULL);

        if (qib_compat_ddr_negotiate) {
                ppd->cpspec->ibdeltainprog = 1;
                ppd->cpspec->ibsymsnap = read_7322_creg32_port(ppd,
                                                crp_ibsymbolerr);
                ppd->cpspec->iblnkerrsnap = read_7322_creg32_port(ppd,
                                                crp_iblinkerrrecov);
        }

        /* flowcontrolwatermark is in units of KBytes */
        ibc = 0x5ULL << SYM_LSB(IBCCtrlA_0, FlowCtrlWaterMark);
        /*
         * Flow control is sent this often, even if no changes in
         * buffer space occur.  Units are 128ns for this chip.
         * Set to 3usec.
         */
        ibc |= 24ULL << SYM_LSB(IBCCtrlA_0, FlowCtrlPeriod);
        /* max error tolerance */
        ibc |= 0xfULL << SYM_LSB(IBCCtrlA_0, PhyerrThreshold);
        /* IB credit flow control. */
        ibc |= 0xfULL << SYM_LSB(IBCCtrlA_0, 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(IBCCtrlA_0, MaxPktLen);
        ppd->cpspec->ibcctrl_a = ibc; /* without linkcmd or linkinitcmd! */

        /* initially come up waiting for TS1, without sending anything. */
        val = ppd->cpspec->ibcctrl_a | (QLOGIC_IB_IBCC_LINKINITCMD_DISABLE <<
                QLOGIC_IB_IBCC_LINKINITCMD_SHIFT);

        /*
         * Reset the PCS interface to the serdes (and also ibc, which is still
         * in reset from above).  Writes new value of ibcctrl_a as last step.
         */
        qib_7322_mini_pcs_reset(ppd);
        qib_write_kreg(dd, kr_scratch, 0ULL);

        if (!ppd->cpspec->ibcctrl_b) {
                unsigned lse = ppd->link_speed_enabled;

                /*
                 * Not on re-init after reset, establish shadow
                 * and force initial config.
                 */
                ppd->cpspec->ibcctrl_b = qib_read_kreg_port(ppd,
                                                             krp_ibcctrl_b);
                ppd->cpspec->ibcctrl_b &= ~(IBA7322_IBC_SPEED_QDR |
                                IBA7322_IBC_SPEED_DDR |
                                IBA7322_IBC_SPEED_SDR |
                                IBA7322_IBC_WIDTH_AUTONEG |
                                SYM_MASK(IBCCtrlB_0, IB_LANE_REV_SUPPORTED));
                if (lse & (lse - 1)) /* Muliple speeds enabled */
                        ppd->cpspec->ibcctrl_b |=
                                (lse << IBA7322_IBC_SPEED_LSB) |
                                IBA7322_IBC_IBTA_1_2_MASK |
                                IBA7322_IBC_MAX_SPEED_MASK;
                else
                        ppd->cpspec->ibcctrl_b |= (lse == QIB_IB_QDR) ?
                                IBA7322_IBC_SPEED_QDR |
                                 IBA7322_IBC_IBTA_1_2_MASK :
                                (lse == QIB_IB_DDR) ?
                                        IBA7322_IBC_SPEED_DDR :
                                        IBA7322_IBC_SPEED_SDR;
                if ((ppd->link_width_enabled & (IB_WIDTH_1X | IB_WIDTH_4X)) ==
                    (IB_WIDTH_1X | IB_WIDTH_4X))
                        ppd->cpspec->ibcctrl_b |= IBA7322_IBC_WIDTH_AUTONEG;
                else
                        ppd->cpspec->ibcctrl_b |=
                                ppd->link_width_enabled == IB_WIDTH_4X ?
                                IBA7322_IBC_WIDTH_4X_ONLY :
                                IBA7322_IBC_WIDTH_1X_ONLY;

                /* always enable these on driver reload, not sticky */
                ppd->cpspec->ibcctrl_b |= (IBA7322_IBC_RXPOL_MASK |
                        IBA7322_IBC_HRTBT_MASK);
        }
        qib_write_kreg_port(ppd, krp_ibcctrl_b, ppd->cpspec->ibcctrl_b);

        /* setup so we have more time at CFGTEST to change H1 */
        val = qib_read_kreg_port(ppd, krp_ibcctrl_c);
        val &= ~SYM_MASK(IBCCtrlC_0, IB_FRONT_PORCH);
        val |= 0xfULL << SYM_LSB(IBCCtrlC_0, IB_FRONT_PORCH);
        qib_write_kreg_port(ppd, krp_ibcctrl_c, val);

        serdes_7322_init(ppd);

        guid = be64_to_cpu(ppd->guid);
        if (!guid) {
                if (dd->base_guid)
                        guid = be64_to_cpu(dd->base_guid) + ppd->port - 1;
                ppd->guid = cpu_to_be64(guid);
        }

        qib_write_kreg_port(ppd, krp_hrtbt_guid, guid);
        /* write to chip to prevent back-to-back writes of ibc reg */
        qib_write_kreg(dd, kr_scratch, 0);

        /* Enable port */
        ppd->cpspec->ibcctrl_a |= SYM_MASK(IBCCtrlA_0, IBLinkEn);
        set_vls(ppd);

        /* be paranoid against later code motion, etc. */
        spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
        ppd->p_rcvctrl |= SYM_MASK(RcvCtrl_0, RcvIBPortEnable);
        qib_write_kreg_port(ppd, krp_rcvctrl, ppd->p_rcvctrl);
        spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);

        /* Hold the link state machine for mezz boards */
        if (IS_QMH(dd) || IS_QME(dd))
                qib_set_ib_7322_lstate(ppd, 0,
                                       QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);

        /* Also enable IBSTATUSCHG interrupt.  */
        val = qib_read_kreg_port(ppd, krp_errmask);
        qib_write_kreg_port(ppd, krp_errmask,
                val | ERR_MASK_N(IBStatusChanged));

        /* Always zero until we start messing with SerDes for real */
        return ret;
}

/**
 * qib_7322_quiet_serdes - set serdes to txidle
 * @dd: the qlogic_ib device
 * Called when driver is being unloaded
 */
static void qib_7322_mini_quiet_serdes(struct qib_pportdata *ppd)
{
        u64 val;
        unsigned long flags;

        qib_set_ib_7322_lstate(ppd, 0, QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);

        spin_lock_irqsave(&ppd->lflags_lock, flags);
        ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
        spin_unlock_irqrestore(&ppd->lflags_lock, flags);
        wake_up(&ppd->cpspec->autoneg_wait);
        cancel_delayed_work_sync(&ppd->cpspec->autoneg_work);
        if (ppd->dd->cspec->r1)
                cancel_delayed_work_sync(&ppd->cpspec->ipg_work);

        ppd->cpspec->chase_end = 0;
        if (ppd->cpspec->chase_timer.data) /* if initted */
                del_timer_sync(&ppd->cpspec->chase_timer);

        /*
         * Despite the name, actually disables IBC as well. Do it when
         * we are as sure as possible that no more packets can be
         * received, following the down and the PCS reset.
         * The actual disabling happens in qib_7322_mini_pci_reset(),
         * along with the PCS being reset.
         */
        ppd->cpspec->ibcctrl_a &= ~SYM_MASK(IBCCtrlA_0, IBLinkEn);
        qib_7322_mini_pcs_reset(ppd);

        /*
         * Update the adjusted counters so the adjustment persists
         * across driver reload.
         */
        if (ppd->cpspec->ibsymdelta || ppd->cpspec->iblnkerrdelta ||
            ppd->cpspec->ibdeltainprog || ppd->cpspec->iblnkdowndelta) {
                struct qib_devdata *dd = ppd->dd;
                u64 diagc;

                /* enable counter writes */
                diagc = qib_read_kreg64(dd, kr_hwdiagctrl);
                qib_write_kreg(dd, kr_hwdiagctrl,
                               diagc | SYM_MASK(HwDiagCtrl, CounterWrEnable));

                if (ppd->cpspec->ibsymdelta || ppd->cpspec->ibdeltainprog) {
                        val = read_7322_creg32_port(ppd, crp_ibsymbolerr);
                        if (ppd->cpspec->ibdeltainprog)
                                val -= val - ppd->cpspec->ibsymsnap;
                        val -= ppd->cpspec->ibsymdelta;
                        write_7322_creg_port(ppd, crp_ibsymbolerr, val);
                }
                if (ppd->cpspec->iblnkerrdelta || ppd->cpspec->ibdeltainprog) {
                        val = read_7322_creg32_port(ppd, crp_iblinkerrrecov);
                        if (ppd->cpspec->ibdeltainprog)
                                val -= val - ppd->cpspec->iblnkerrsnap;
                        val -= ppd->cpspec->iblnkerrdelta;
                        write_7322_creg_port(ppd, crp_iblinkerrrecov, val);
                }
                if (ppd->cpspec->iblnkdowndelta) {
                        val = read_7322_creg32_port(ppd, crp_iblinkdown);
                        val += ppd->cpspec->iblnkdowndelta;
                        write_7322_creg_port(ppd, crp_iblinkdown, val);
                }
                /*
                 * No need to save ibmalfdelta since IB perfcounters
                 * are cleared on driver reload.
                 */

                /* and disable counter writes */
                qib_write_kreg(dd, kr_hwdiagctrl, diagc);
        }
}

/**
 * qib_setup_7322_setextled - set the state of the two external LEDs
 * @ppd: physical port on the qlogic_ib device
 * @on: whether the link is up or not
 *
 * The exact combo of LEDs if on is true is determined by looking
 * at the ibcstatus.
 *
 * These LEDs indicate the physical and logical state of IB link.
 * For this chip (at least with recommended board pinouts), LED1
 * is Yellow (logical state) and LED2 is Green (physical state),
 *
 * Note:  We try to match the Mellanox HCA LED behavior as best
 * we can.  Green indicates physical link state is OK (something is
 * plugged in, and we can train).
 * Amber indicates the link is logically up (ACTIVE).
 * Mellanox further blinks the amber LED to indicate data packet
 * activity, but we have no hardware support for that, so it would
 * require waking up every 10-20 msecs and checking the counters
 * on the chip, and then turning the LED off if appropriate.  That's
 * visible overhead, so not something we will do.
 */
static void qib_setup_7322_setextled(struct qib_pportdata *ppd, u32 on)
{
        struct qib_devdata *dd = ppd->dd;
        u64 extctl, ledblink = 0, val;
        unsigned long flags;
        int yel, grn;

        /*
         * 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) {
                grn = (ppd->led_override & QIB_LED_PHYS);
                yel = (ppd->led_override & QIB_LED_LOG);
        } else if (on) {
                val = qib_read_kreg_port(ppd, krp_ibcstatus_a);
                grn = qib_7322_phys_portstate(val) ==
                        IB_PHYSPORTSTATE_LINKUP;
                yel = qib_7322_iblink_state(val) == IB_PORT_ACTIVE;
        } else {
                grn = 0;
                yel = 0;
        }

        spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
        extctl = dd->cspec->extctrl & (ppd->port == 1 ?
                ~ExtLED_IB1_MASK : ~ExtLED_IB2_MASK);
        if (grn) {
                extctl |= ppd->port == 1 ? ExtLED_IB1_GRN : ExtLED_IB2_GRN;
                /*
                 * Counts are in chip clock (4ns) periods.
                 * This is 1/16 sec (66.6ms) on,
                 * 3/16 sec (187.5 ms) off, with packets rcvd.
                 */
                ledblink = ((66600 * 1000UL / 4) << IBA7322_LEDBLINK_ON_SHIFT) |
                        ((187500 * 1000UL / 4) << IBA7322_LEDBLINK_OFF_SHIFT);
        }
        if (yel)
                extctl |= ppd->port == 1 ? ExtLED_IB1_YEL : ExtLED_IB2_YEL;
        dd->cspec->extctrl = extctl;
        qib_write_kreg(dd, kr_extctrl, dd->cspec->extctrl);
        spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);

        if (ledblink) /* blink the LED on packet receive */
                qib_write_kreg_port(ppd, krp_rcvpktledcnt, ledblink);
}

/*
 * Disable MSIx interrupt if enabled, call generic MSIx code
 * to cleanup, and clear pending MSIx interrupts.
 * Used for fallback to INTx, after reset, and when MSIx setup fails.
 */
static void qib_7322_nomsix(struct qib_devdata *dd)
{
        u64 intgranted;
        int n;

        dd->cspec->main_int_mask = ~0ULL;
        n = dd->cspec->num_msix_entries;
        if (n) {
                int i;

                dd->cspec->num_msix_entries = 0;
                for (i = 0; i < n; i++)
                        free_irq(dd->cspec->msix_entries[i].vector,
                                 dd->cspec->msix_arg[i]);
                qib_nomsix(dd);
        }
        /* make sure no MSIx interrupts are left pending */
        intgranted = qib_read_kreg64(dd, kr_intgranted);
        if (intgranted)
                qib_write_kreg(dd, kr_intgranted, intgranted);
}

static void qib_7322_free_irq(struct qib_devdata *dd)
{
        if (dd->cspec->irq) {
                free_irq(dd->cspec->irq, dd);
                dd->cspec->irq = 0;
        }
        qib_7322_nomsix(dd);
}

static void qib_setup_7322_cleanup(struct qib_devdata *dd)
{
        int i;

        qib_7322_free_irq(dd);
        kfree(dd->cspec->cntrs);
        kfree(dd->cspec->sendchkenable);
        kfree(dd->cspec->sendgrhchk);
        kfree(dd->cspec->sendibchk);
        kfree(dd->cspec->msix_entries);
        kfree(dd->cspec->msix_arg);
        for (i = 0; i < dd->num_pports; i++) {
                unsigned long flags;
                u32 mask = QSFP_GPIO_MOD_PRS_N |
                        (QSFP_GPIO_MOD_PRS_N << QSFP_GPIO_PORT2_SHIFT);

                kfree(dd->pport[i].cpspec->portcntrs);
                if (dd->flags & QIB_HAS_QSFP) {
                        spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
                        dd->cspec->gpio_mask &= ~mask;
                        qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
                        spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
                        qib_qsfp_deinit(&dd->pport[i].cpspec->qsfp_data);
                }
                if (dd->pport[i].ibport_data.smi_ah)
                        ib_destroy_ah(&dd->pport[i].ibport_data.smi_ah->ibah);
        }
}

/* handle SDMA interrupts */
static void sdma_7322_intr(struct qib_devdata *dd, u64 istat)
{
        struct qib_pportdata *ppd0 = &dd->pport[0];
        struct qib_pportdata *ppd1 = &dd->pport[1];
        u64 intr0 = istat & (INT_MASK_P(SDma, 0) |
                INT_MASK_P(SDmaIdle, 0) | INT_MASK_P(SDmaProgress, 0));
        u64 intr1 = istat & (INT_MASK_P(SDma, 1) |
                INT_MASK_P(SDmaIdle, 1) | INT_MASK_P(SDmaProgress, 1));

        if (intr0)
                qib_sdma_intr(ppd0);
        if (intr1)
                qib_sdma_intr(ppd1);

        if (istat & INT_MASK_PM(SDmaCleanupDone, 0))
                qib_sdma_process_event(ppd0, qib_sdma_event_e20_hw_started);
        if (istat & INT_MASK_PM(SDmaCleanupDone, 1))
                qib_sdma_process_event(ppd1, qib_sdma_event_e20_hw_started);
}

/*
 * Set or clear the Send buffer available interrupt enable bit.
 */
static void qib_wantpiobuf_7322_intr(struct qib_devdata *dd, u32 needint)
{
        unsigned long flags;

        spin_lock_irqsave(&dd->sendctrl_lock, flags);
        if (needint)
                dd->sendctrl |= SYM_MASK(SendCtrl, SendIntBufAvail);
        else
                dd->sendctrl &= ~SYM_MASK(SendCtrl, SendIntBufAvail);
        qib_write_kreg(dd, kr_sendctrl, dd->sendctrl);
        qib_write_kreg(dd, kr_scratch, 0ULL);
        spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
}

/*
 * Somehow got an interrupt with reserved bits set in interrupt status.
 * Print a message so we know it happened, then clear them.
 * keep mainline interrupt handler cache-friendly
 */
static noinline void unknown_7322_ibits(struct qib_devdata *dd, u64 istat)
{
        u64 kills;
        char msg[128];

        kills = istat & ~QIB_I_BITSEXTANT;
        qib_dev_err(dd, "Clearing reserved interrupt(s) 0x%016llx:"
                    " %s\n", (unsigned long long) kills, msg);
        qib_write_kreg(dd, kr_intmask, (dd->cspec->int_enable_mask & ~kills));
}

/* keep mainline interrupt handler cache-friendly */
static noinline void unknown_7322_gpio_intr(struct qib_devdata *dd)
{
        u32 gpiostatus;
        int handled = 0;
        int pidx;

        /*
         * Boards for this chip currently don't use GPIO interrupts,
         * so clear by writing GPIOstatus to GPIOclear, and complain
         * to developer.  To avoid endless repeats, clear
         * the bits in the mask, since there is some kind of
         * programming error or chip problem.
         */
        gpiostatus = qib_read_kreg32(dd, kr_gpio_status);
        /*
         * In theory, writing GPIOstatus to GPIOclear could
         * have a bad side-effect on some diagnostic that wanted
         * to poll for a status-change, but the various shadows
         * make that problematic at best. Diags will just suppress
         * all GPIO interrupts during such tests.
         */
        qib_write_kreg(dd, kr_gpio_clear, gpiostatus);
        /*
         * Check for QSFP MOD_PRS changes
         * only works for single port if IB1 != pidx1
         */
        for (pidx = 0; pidx < dd->num_pports && (dd->flags & QIB_HAS_QSFP);
             ++pidx) {
                struct qib_pportdata *ppd;
                struct qib_qsfp_data *qd;
                u32 mask;
                if (!dd->pport[pidx].link_speed_supported)
                        continue;
                mask = QSFP_GPIO_MOD_PRS_N;
                ppd = dd->pport + pidx;
                mask <<= (QSFP_GPIO_PORT2_SHIFT * ppd->hw_pidx);
                if (gpiostatus & dd->cspec->gpio_mask & mask) {
                        u64 pins;
                        qd = &ppd->cpspec->qsfp_data;
                        gpiostatus &= ~mask;
                        pins = qib_read_kreg64(dd, kr_extstatus);
                        pins >>= SYM_LSB(EXTStatus, GPIOIn);
                        if (!(pins & mask)) {
                                ++handled;
                                qd->t_insert = get_jiffies_64();
                                queue_work(ib_wq, &qd->work);
                        }
                }
        }

        if (gpiostatus && !handled) {
                const u32 mask = qib_read_kreg32(dd, kr_gpio_mask);
                u32 gpio_irq = mask & gpiostatus;

                /*
                 * Clear any troublemakers, and update chip from shadow
                 */
                dd->cspec->gpio_mask &= ~gpio_irq;
                qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
        }
}

/*
 * Handle errors and unusual events first, separate function
 * to improve cache hits for fast path interrupt handling.
 */
static noinline void unlikely_7322_intr(struct qib_devdata *dd, u64 istat)
{
        if (istat & ~QIB_I_BITSEXTANT)
                unknown_7322_ibits(dd, istat);
        if (istat & QIB_I_GPIO)
                unknown_7322_gpio_intr(dd);
        if (istat & QIB_I_C_ERROR) {
                qib_write_kreg(dd, kr_errmask, 0ULL);
                tasklet_schedule(&dd->error_tasklet);
        }
        if (istat & INT_MASK_P(Err, 0) && dd->rcd[0])
                handle_7322_p_errors(dd->rcd[0]->ppd);
        if (istat & INT_MASK_P(Err, 1) && dd->rcd[1])
                handle_7322_p_errors(dd->rcd[1]->ppd);
}

/*
 * Dynamically adjust the rcv int timeout for a context based on incoming
 * packet rate.
 */
static void adjust_rcv_timeout(struct qib_ctxtdata *rcd, int npkts)
{
        struct qib_devdata *dd = rcd->dd;
        u32 timeout = dd->cspec->rcvavail_timeout[rcd->ctxt];

        /*
         * Dynamically adjust idle timeout on chip
         * based on number of packets processed.
         */
        if (npkts < rcv_int_count && timeout > 2)
                timeout >>= 1;
        else if (npkts >= rcv_int_count && timeout < rcv_int_timeout)
                timeout = min(timeout << 1, rcv_int_timeout);
        else
                return;

        dd->cspec->rcvavail_timeout[rcd->ctxt] = timeout;
        qib_write_kreg(dd, kr_rcvavailtimeout + rcd->ctxt, timeout);
}

/*
 * This is the main interrupt handler.
 * It will normally only be used for low frequency interrupts but may
 * have to handle all interrupts if INTx is enabled or fewer than normal
 * MSIx interrupts were allocated.
 * This routine should ignore the interrupt bits for any of the
 * dedicated MSIx handlers.
 */
static irqreturn_t qib_7322intr(int irq, void *data)
{
        struct qib_devdata *dd = data;
        irqreturn_t ret;
        u64 istat;
        u64 ctxtrbits;
        u64 rmask;
        unsigned i;
        u32 npkts;

        if ((dd->flags & (QIB_PRESENT | QIB_BADINTR)) != QIB_PRESENT) {
                /*
                 * This return value is not great, but we do not want the
                 * interrupt core code to remove our interrupt handler
                 * because we don't appear to be handling an interrupt
                 * during a chip reset.
                 */
                ret = IRQ_HANDLED;
                goto bail;
        }

        istat = qib_read_kreg64(dd, kr_intstatus);

        if (unlikely(istat == ~0ULL)) {
                qib_bad_intrstatus(dd);
                qib_dev_err(dd, "Interrupt status all f's, skipping\n");
                /* don't know if it was our interrupt or not */
                ret = IRQ_NONE;
                goto bail;
        }

        istat &= dd->cspec->main_int_mask;
        if (unlikely(!istat)) {
                /* already handled, or shared and not us */
                ret = IRQ_NONE;
                goto bail;
        }

        qib_stats.sps_ints++;
        if (dd->int_counter != (u32) -1)
                dd->int_counter++;

        /* handle "errors" of various kinds first, device ahead of port */
        if (unlikely(istat & (~QIB_I_BITSEXTANT | QIB_I_GPIO |
                              QIB_I_C_ERROR | INT_MASK_P(Err, 0) |
                              INT_MASK_P(Err, 1))))
                unlikely_7322_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 & (QIB_I_RCVAVAIL_MASK | QIB_I_RCVURG_MASK);
        if (ctxtrbits) {
                rmask = (1ULL << QIB_I_RCVAVAIL_LSB) |
                        (1ULL << QIB_I_RCVURG_LSB);
                for (i = 0; i < dd->first_user_ctxt; i++) {
                        if (ctxtrbits & rmask) {
                                ctxtrbits &= ~rmask;
                                if (dd->rcd[i]) {
                                        qib_kreceive(dd->rcd[i], NULL, &npkts);
                                }
                        }
                        rmask <<= 1;
                }
                if (ctxtrbits) {
                        ctxtrbits = (ctxtrbits >> QIB_I_RCVAVAIL_LSB) |
                                (ctxtrbits >> QIB_I_RCVURG_LSB);
                        qib_handle_urcv(dd, ctxtrbits);
                }
        }

        if (istat & (QIB_I_P_SDMAINT(0) | QIB_I_P_SDMAINT(1)))
                sdma_7322_intr(dd, istat);

        if ((istat & QIB_I_SPIOBUFAVAIL) && (dd->flags & QIB_INITTED))
                qib_ib_piobufavail(dd);

        ret = IRQ_HANDLED;
bail:
        return ret;
}

/*
 * Dedicated receive packet available interrupt handler.
 */
static irqreturn_t qib_7322pintr(int irq, void *data)
{
        struct qib_ctxtdata *rcd = data;
        struct qib_devdata *dd = rcd->dd;
        u32 npkts;

        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.
                 */
                return IRQ_HANDLED;

        qib_stats.sps_ints++;
        if (dd->int_counter != (u32) -1)
                dd->int_counter++;

        /* Clear the interrupt bit we expect to be set. */
        qib_write_kreg(dd, kr_intclear, ((1ULL << QIB_I_RCVAVAIL_LSB) |
                       (1ULL << QIB_I_RCVURG_LSB)) << rcd->ctxt);

        qib_kreceive(rcd, NULL, &npkts);

        return IRQ_HANDLED;
}

/*
 * Dedicated Send buffer available interrupt handler.
 */
static irqreturn_t qib_7322bufavail(int irq, void *data)
{
        struct qib_devdata *dd = data;

        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.
                 */
                return IRQ_HANDLED;

        qib_stats.sps_ints++;
        if (dd->int_counter != (u32) -1)
                dd->int_counter++;

        /* Clear the interrupt bit we expect to be set. */
        qib_write_kreg(dd, kr_intclear, QIB_I_SPIOBUFAVAIL);

        /* qib_ib_piobufavail() will clear the want PIO interrupt if needed */
        if (dd->flags & QIB_INITTED)
                qib_ib_piobufavail(dd);
        else
                qib_wantpiobuf_7322_intr(dd, 0);

        return IRQ_HANDLED;
}

/*
 * Dedicated Send DMA interrupt handler.
 */
static irqreturn_t sdma_intr(int irq, void *data)
{
        struct qib_pportdata *ppd = data;
        struct qib_devdata *dd = ppd->dd;

        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.
                 */
                return IRQ_HANDLED;

        qib_stats.sps_ints++;
        if (dd->int_counter != (u32) -1)
                dd->int_counter++;

        /* Clear the interrupt bit we expect to be set. */
        qib_write_kreg(dd, kr_intclear, ppd->hw_pidx ?
                       INT_MASK_P(SDma, 1) : INT_MASK_P(SDma, 0));
        qib_sdma_intr(ppd);

        return IRQ_HANDLED;
}

/*
 * Dedicated Send DMA idle interrupt handler.
 */
static irqreturn_t sdma_idle_intr(int irq, void *data)
{
        struct qib_pportdata *ppd = data;
        struct qib_devdata *dd = ppd->dd;

        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.
                 */
                return IRQ_HANDLED;

        qib_stats.sps_ints++;
        if (dd->int_counter != (u32) -1)
                dd->int_counter++;

        /* Clear the interrupt bit we expect to be set. */
        qib_write_kreg(dd, kr_intclear, ppd->hw_pidx ?
                       INT_MASK_P(SDmaIdle, 1) : INT_MASK_P(SDmaIdle, 0));
        qib_sdma_intr(ppd);

        return IRQ_HANDLED;
}

/*
 * Dedicated Send DMA progress interrupt handler.
 */
static irqreturn_t sdma_progress_intr(int irq, void *data)
{
        struct qib_pportdata *ppd = data;
        struct qib_devdata *dd = ppd->dd;

        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.
                 */
                return IRQ_HANDLED;

        qib_stats.sps_ints++;
        if (dd->int_counter != (u32) -1)
                dd->int_counter++;

        /* Clear the interrupt bit we expect to be set. */
        qib_write_kreg(dd, kr_intclear, ppd->hw_pidx ?
                       INT_MASK_P(SDmaProgress, 1) :
                       INT_MASK_P(SDmaProgress, 0));
        qib_sdma_intr(ppd);

        return IRQ_HANDLED;
}

/*
 * Dedicated Send DMA cleanup interrupt handler.
 */
static irqreturn_t sdma_cleanup_intr(int irq, void *data)
{
        struct qib_pportdata *ppd = data;
        struct qib_devdata *dd = ppd->dd;

        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.
                 */
                return IRQ_HANDLED;

        qib_stats.sps_ints++;
        if (dd->int_counter != (u32) -1)
                dd->int_counter++;

        /* Clear the interrupt bit we expect to be set. */
        qib_write_kreg(dd, kr_intclear, ppd->hw_pidx ?
                       INT_MASK_PM(SDmaCleanupDone, 1) :
                       INT_MASK_PM(SDmaCleanupDone, 0));
        qib_sdma_process_event(ppd, qib_sdma_event_e20_hw_started);

        return IRQ_HANDLED;
}

/*
 * Set up our chip-specific interrupt handler.
 * The interrupt type has already been setup, so
 * we just need to do the registration and error checking.
 * If we are using MSIx interrupts, we may fall back to
 * INTx later, if the interrupt handler doesn't get called
 * within 1/2 second (see verify_interrupt()).
 */
static void qib_setup_7322_interrupt(struct qib_devdata *dd, int clearpend)
{
        int ret, i, msixnum;
        u64 redirect[6];
        u64 mask;

        if (!dd->num_pports)
                return;

        if (clearpend) {
                /*
                 * if not switching interrupt types, be sure interrupts are
                 * disabled, and then clear anything pending at this point,
                 * because we are starting clean.
                 */
                qib_7322_set_intr_state(dd, 0);

                /* clear the reset error, init error/hwerror mask */
                qib_7322_init_hwerrors(dd);

                /* clear any interrupt bits that might be set */
                qib_write_kreg(dd, kr_intclear, ~0ULL);

                /* make sure no pending MSIx intr, and clear diag reg */
                qib_write_kreg(dd, kr_intgranted, ~0ULL);
                qib_write_kreg(dd, kr_vecclr_wo_int, ~0ULL);
        }

        if (!dd->cspec->num_msix_entries) {
                /* Try to get INTx interrupt */
try_intx:
                if (!dd->pcidev->irq) {
                        qib_dev_err(dd, "irq is 0, BIOS error?  "
                                    "Interrupts won't work\n");
                        goto bail;
                }
                ret = request_irq(dd->pcidev->irq, qib_7322intr,
                                  IRQF_SHARED, QIB_DRV_NAME, dd);
                if (ret) {
                        qib_dev_err(dd, "Couldn't setup INTx "
                                    "interrupt (irq=%d): %d\n",
                                    dd->pcidev->irq, ret);
                        goto bail;
                }
                dd->cspec->irq = dd->pcidev->irq;
                dd->cspec->main_int_mask = ~0ULL;
                goto bail;
        }

        /* Try to get MSIx interrupts */
        memset(redirect, 0, sizeof redirect);
        mask = ~0ULL;
        msixnum = 0;
        for (i = 0; msixnum < dd->cspec->num_msix_entries; i++) {
                irq_handler_t handler;
                const char *name;
                void *arg;
                u64 val;
                int lsb, reg, sh;

                if (i < ARRAY_SIZE(irq_table)) {
                        if (irq_table[i].port) {
                                /* skip if for a non-configured port */
                                if (irq_table[i].port > dd->num_pports)
                                        continue;
                                arg = dd->pport + irq_table[i].port - 1;
                        } else
                                arg = dd;
                        lsb = irq_table[i].lsb;
                        handler = irq_table[i].handler;
                        name = irq_table[i].name;
                } else {
                        unsigned ctxt;

                        ctxt = i - ARRAY_SIZE(irq_table);
                        /* per krcvq context receive interrupt */
                        arg = dd->rcd[ctxt];
                        if (!arg)
                                continue;
                        if (qib_krcvq01_no_msi && ctxt < 2)
                                continue;
                        lsb = QIB_I_RCVAVAIL_LSB + ctxt;
                        handler = qib_7322pintr;
                        name = QIB_DRV_NAME " (kctx)";
                }
                ret = request_irq(dd->cspec->msix_entries[msixnum].vector,
                                  handler, 0, name, arg);
                if (ret) {
                        /*
                         * Shouldn't happen since the enable said we could
                         * have as many as we are trying to setup here.
                         */
                        qib_dev_err(dd, "Couldn't setup MSIx "
                                    "interrupt (vec=%d, irq=%d): %d\n", msixnum,
                                    dd->cspec->msix_entries[msixnum].vector,
                                    ret);
                        qib_7322_nomsix(dd);
                        goto try_intx;
                }
                dd->cspec->msix_arg[msixnum] = arg;
                if (lsb >= 0) {
                        reg = lsb / IBA7322_REDIRECT_VEC_PER_REG;
                        sh = (lsb % IBA7322_REDIRECT_VEC_PER_REG) *
                                SYM_LSB(IntRedirect0, vec1);
                        mask &= ~(1ULL << lsb);
                        redirect[reg] |= ((u64) msixnum) << sh;
                }
                val = qib_read_kreg64(dd, 2 * msixnum + 1 +
                        (QIB_7322_MsixTable_OFFS / sizeof(u64)));
                msixnum++;
        }
        /* Initialize the vector mapping */
        for (i = 0; i < ARRAY_SIZE(redirect); i++)
                qib_write_kreg(dd, kr_intredirect + i, redirect[i]);
        dd->cspec->main_int_mask = mask;
        tasklet_init(&dd->error_tasklet, qib_error_tasklet,
                (unsigned long)dd);
bail:;
}

/**
 * qib_7322_boardname - fill in the board name and note features
 * @dd: the qlogic_ib device
 *
 * info will be based on the board revision register
 */
static unsigned qib_7322_boardname(struct qib_devdata *dd)
{
        /* Will need enumeration of board-types here */
        char *n;
        u32 boardid, namelen;
        unsigned features = DUAL_PORT_CAP;

        boardid = SYM_FIELD(dd->revision, Revision, BoardID);

        switch (boardid) {
        case 0:
                n = "InfiniPath_QLE7342_Emulation";
                break;
        case 1:
                n = "InfiniPath_QLE7340";
                dd->flags |= QIB_HAS_QSFP;
                features = PORT_SPD_CAP;
                break;
        case 2:
                n = "InfiniPath_QLE7342";
                dd->flags |= QIB_HAS_QSFP;
                break;
        case 3:
                n = "InfiniPath_QMI7342";
                break;
        case 4:
                n = "InfiniPath_Unsupported7342";
                qib_dev_err(dd, "Unsupported version of QMH7342\n");
                features = 0;
                break;
        case BOARD_QMH7342:
                n = "InfiniPath_QMH7342";
                features = 0x24;
                break;
        case BOARD_QME7342:
                n = "InfiniPath_QME7342";
                break;
        case 8:
                n = "InfiniPath_QME7362";
                dd->flags |= QIB_HAS_QSFP;
                break;
        case 15:
                n = "InfiniPath_QLE7342_TEST";
                dd->flags |= QIB_HAS_QSFP;
                break;
        default:
                n = "InfiniPath_QLE73xy_UNKNOWN";
                qib_dev_err(dd, "Unknown 7322 board type %u\n", boardid);
                break;
        }
        dd->board_atten = 1; /* index into txdds_Xdr */

        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);

        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));

        if (qib_singleport && (features >> PORT_SPD_CAP_SHIFT) & PORT_SPD_CAP) {
                qib_devinfo(dd->pcidev, "IB%u: Forced to single port mode"
                            " by module parameter\n", dd->unit);
                features &= PORT_SPD_CAP;
        }

        return features;
}

/*
 * This routine sleeps, so it can only be called from user context, not
 * from interrupt context.
 */
static int qib_do_7322_reset(struct qib_devdata *dd)
{
        u64 val;
        u64 *msix_vecsave;
        int i, msix_entries, ret = 1;
        u16 cmdval;
        u8 int_line, clinesz;
        unsigned long flags;

        /* Use dev_err so it shows up in logs, etc. */
        qib_dev_err(dd, "Resetting InfiniPath unit %u\n", dd->unit);

        qib_pcie_getcmd(dd, &cmdval, &int_line, &clinesz);

        msix_entries = dd->cspec->num_msix_entries;

        /* no interrupts till re-initted */
        qib_7322_set_intr_state(dd, 0);

        if (msix_entries) {
                qib_7322_nomsix(dd);
                /* can be up to 512 bytes, too big for stack */
                msix_vecsave = kmalloc(2 * dd->cspec->num_msix_entries *
                        sizeof(u64), GFP_KERNEL);
                if (!msix_vecsave)
                        qib_dev_err(dd, "No mem to save MSIx data\n");
        } else
                msix_vecsave = NULL;

        /*
         * Core PCI (as of 2.6.18) doesn't save or rewrite the full vector
         * info that is set up by the BIOS, so we have to save and restore
         * it ourselves.   There is some risk something could change it,
         * after we save it, but since we have disabled the MSIx, it
         * shouldn't be touched...
         */
        for (i = 0; i < msix_entries; i++) {
                u64 vecaddr, vecdata;
                vecaddr = qib_read_kreg64(dd, 2 * i +
                                  (QIB_7322_MsixTable_OFFS / sizeof(u64)));
                vecdata = qib_read_kreg64(dd, 1 + 2 * i +
                                  (QIB_7322_MsixTable_OFFS / sizeof(u64)));
                if (msix_vecsave) {
                        msix_vecsave[2 * i] = vecaddr;
                        /* save it without the masked bit set */
                        msix_vecsave[1 + 2 * i] = vecdata & ~0x100000000ULL;
                }
        }

        dd->pport->cpspec->ibdeltainprog = 0;
        dd->pport->cpspec->ibsymdelta = 0;
        dd->pport->cpspec->iblnkerrdelta = 0;
        dd->pport->cpspec->ibmalfdelta = 0;
        dd->int_counter = 0; /* so we check interrupts work again */

        /*
         * 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 | QIB_BADINTR);
        dd->flags |= QIB_DOING_RESET;
        val = dd->control | QLOGIC_IB_C_RESET;
        writeq(val, &dd->kregbase[kr_control]);

        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) * 3000);

                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)
                        break;
                if (i == 5) {
                        qib_dev_err(dd, "Failed to initialize after reset, "
                                    "unusable\n");
                        ret = 0;
                        goto  bail;
                }
        }

        dd->flags |= QIB_PRESENT; /* it's back */

        if (msix_entries) {
                /* restore the MSIx vector address and data if saved above */
                for (i = 0; i < msix_entries; i++) {
                        dd->cspec->msix_entries[i].entry = i;
                        if (!msix_vecsave || !msix_vecsave[2 * i])
                                continue;
                        qib_write_kreg(dd, 2 * i +
                                (QIB_7322_MsixTable_OFFS / sizeof(u64)),
                                msix_vecsave[2 * i]);
                        qib_write_kreg(dd, 1 + 2 * i +
                                (QIB_7322_MsixTable_OFFS / sizeof(u64)),
                                msix_vecsave[1 + 2 * i]);
                }
        }

        /* initialize the remaining registers.  */
        for (i = 0; i < dd->num_pports; ++i)
                write_7322_init_portregs(&dd->pport[i]);
        write_7322_initregs(dd);

        if (qib_pcie_params(dd, dd->lbus_width,
                            &dd->cspec->num_msix_entries,
                            dd->cspec->msix_entries))
                qib_dev_err(dd, "Reset failed to setup PCIe or interrupts; "
                                "continuing anyway\n");

        qib_setup_7322_interrupt(dd, 1);

        for (i = 0; i < dd->num_pports; ++i) {
                struct qib_pportdata *ppd = &dd->pport[i];

                spin_lock_irqsave(&ppd->lflags_lock, flags);
                ppd->lflags |= QIBL_IB_FORCE_NOTIFY;
                ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
                spin_unlock_irqrestore(&ppd->lflags_lock, flags);
        }

bail:
        dd->flags &= ~QIB_DOING_RESET; /* OK or not, no longer resetting */
        kfree(msix_vecsave);
        return ret;
}

/**
 * qib_7322_put_tid - write a TID to the chip
 * @dd: the qlogic_ib device
 * @tidptr: pointer to the expected TID (in chip) to update
 * @tidtype: 0 for eager, 1 for expected
 * @pa: physical address of in memory buffer; tidinvalid if freeing
 */
static void qib_7322_put_tid(struct qib_devdata *dd, u64 __iomem *tidptr,
                             u32 type, unsigned long pa)
{
        if (!(dd->flags & QIB_PRESENT))
                return;
        if (pa != dd->tidinvalid) {
                u64 chippa = pa >> IBA7322_TID_PA_SHIFT;

                /* paranoia checks */
                if (pa != (chippa << IBA7322_TID_PA_SHIFT)) {
                        qib_dev_err(dd, "Physaddr %lx not 2KB aligned!\n",
                                    pa);
                        return;
                }
                if (chippa >= (1UL << IBA7322_TID_SZ_SHIFT)) {
                        qib_dev_err(dd, "Physical page address 0x%lx "
                                "larger than supported\n", pa);
                        return;
                }

                if (type == RCVHQ_RCV_TYPE_EAGER)
                        chippa |= dd->tidtemplate;
                else /* for now, always full 4KB page */
                        chippa |= IBA7322_TID_SZ_4K;
                pa = chippa;
        }
        writeq(pa, tidptr);
        mmiowb();
}

/**
 * qib_7322_clear_tids - clear all TID entries for a ctxt, expected and eager
 * @dd: the qlogic_ib device
 * @ctxt: the ctxt
 *
 * clear all TID entries for a ctxt, expected and eager.
 * Used from qib_close().
 */
static void qib_7322_clear_tids(struct qib_devdata *dd,
                                struct qib_ctxtdata *rcd)
{
        u64 __iomem *tidbase;
        unsigned long tidinv;
        u32 ctxt;
        int i;

        if (!dd->kregbase || !rcd)
                return;

        ctxt = rcd->ctxt;

        tidinv = dd->tidinvalid;
        tidbase = (u64 __iomem *)
                ((char __iomem *) dd->kregbase +
                 dd->rcvtidbase +
                 ctxt * dd->rcvtidcnt * sizeof(*tidbase));

        for (i = 0; i < dd->rcvtidcnt; i++)
                qib_7322_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EXPECTED,
                                 tidinv);

        tidbase = (u64 __iomem *)
                ((char __iomem *) dd->kregbase +
                 dd->rcvegrbase +
                 rcd->rcvegr_tid_base * sizeof(*tidbase));

        for (i = 0; i < rcd->rcvegrcnt; i++)
                qib_7322_put_tid(dd, &tidbase[i], RCVHQ_RCV_TYPE_EAGER,
                                 tidinv);
}

/**
 * qib_7322_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_7322_tidtemplate(struct qib_devdata *dd)
{
        /*
         * 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 it per port 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 (dd->rcvegrbufsize == 2048)
                dd->tidtemplate = IBA7322_TID_SZ_2K;
        else if (dd->rcvegrbufsize == 4096)
                dd->tidtemplate = IBA7322_TID_SZ_4K;
        dd->tidinvalid = 0;
}

/**
 * qib_init_7322_get_base_info - set chip-specific flags for user code
 * @rcd: the qlogic_ib ctxt
 * @kbase: qib_base_info pointer
 *
 * We set the PCIE flag because the lower bandwidth on PCIe vs
 * HyperTransport can affect some user packet algorithims.
 */

static int qib_7322_get_base_info(struct qib_ctxtdata *rcd,
                                  struct qib_base_info *kinfo)
{
        kinfo->spi_runtime_flags |= QIB_RUNTIME_CTXT_MSB_IN_QP |
                QIB_RUNTIME_PCIE | QIB_RUNTIME_NODMA_RTAIL |
                QIB_RUNTIME_HDRSUPP | QIB_RUNTIME_SDMA;
        if (rcd->dd->cspec->r1)
                kinfo->spi_runtime_flags |= QIB_RUNTIME_RCHK;
        if (rcd->dd->flags & QIB_USE_SPCL_TRIG)
                kinfo->spi_runtime_flags |= QIB_RUNTIME_SPECIAL_TRIGGER;

        return 0;
}

static struct qib_message_header *
qib_7322_get_msgheader(struct qib_devdata *dd, __le32 *rhf_addr)
{
        u32 offset = qib_hdrget_offset(rhf_addr);

        return (struct qib_message_header *)
                (rhf_addr - dd->rhf_offset + offset);
}

/*
 * Configure number of contexts.
 */
static void qib_7322_config_ctxts(struct qib_devdata *dd)
{
        unsigned long flags;
        u32 nchipctxts;

        nchipctxts = qib_read_kreg32(dd, kr_contextcnt);
        dd->cspec->numctxts = nchipctxts;
        if (qib_n_krcv_queues > 1 && dd->num_pports) {
                dd->first_user_ctxt = NUM_IB_PORTS +
                        (qib_n_krcv_queues - 1) * dd->num_pports;
                if (dd->first_user_ctxt > nchipctxts)
                        dd->first_user_ctxt = nchipctxts;
                dd->n_krcv_queues = dd->first_user_ctxt / dd->num_pports;
        } else {
                dd->first_user_ctxt = NUM_IB_PORTS;
                dd->n_krcv_queues = 1;
        }

        if (!qib_cfgctxts) {
                int nctxts = dd->first_user_ctxt + num_online_cpus();

                if (nctxts <= 6)
                        dd->ctxtcnt = 6;
                else if (nctxts <= 10)
                        dd->ctxtcnt = 10;
                else if (nctxts <= nchipctxts)
                        dd->ctxtcnt = nchipctxts;
        } else if (qib_cfgctxts < dd->num_pports)
                dd->ctxtcnt = dd->num_pports;
        else if (qib_cfgctxts <= nchipctxts)
                dd->ctxtcnt = qib_cfgctxts;
        if (!dd->ctxtcnt) /* none of the above, set to max */
                dd->ctxtcnt = nchipctxts;

        /*
         * Chip can be configured for 6, 10, or 18 ctxts, and choice
         * affects number of eager TIDs per ctxt (1K, 2K, 4K).
         * Lock to be paranoid about later motion, etc.
         */
        spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
        if (dd->ctxtcnt > 10)
                dd->rcvctrl |= 2ULL << SYM_LSB(RcvCtrl, ContextCfg);
        else if (dd->ctxtcnt > 6)
                dd->rcvctrl |= 1ULL << SYM_LSB(RcvCtrl, ContextCfg);
        /* else configure for default 6 receive ctxts */

        /* The XRC opcode is 5. */
        dd->rcvctrl |= 5ULL << SYM_LSB(RcvCtrl, XrcTypeCode);

        /*
         * RcvCtrl *must* be written here so that the
         * chip understands how to change rcvegrcnt below.
         */
        qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
        spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);

        /* kr_rcvegrcnt changes based on the number of contexts enabled */
        dd->cspec->rcvegrcnt = qib_read_kreg32(dd, kr_rcvegrcnt);
        if (qib_rcvhdrcnt)
                dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt, qib_rcvhdrcnt);
        else
                dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt,
                                    dd->num_pports > 1 ? 1024U : 2048U);
}

static int qib_7322_get_ib_cfg(struct qib_pportdata *ppd, int which)
{

        int lsb, ret = 0;
        u64 maskr; /* right-justified mask */

        switch (which) {

        case QIB_IB_CFG_LWID_ENB: /* Get allowed Link-width */
                ret = ppd->link_width_enabled;
                goto done;

        case QIB_IB_CFG_LWID: /* Get currently active Link-width */
                ret = ppd->link_width_active;
                goto done;

        case QIB_IB_CFG_SPD_ENB: /* Get allowed Link speeds */
                ret = ppd->link_speed_enabled;
                goto done;

        case QIB_IB_CFG_SPD: /* Get current Link spd */
                ret = ppd->link_speed_active;
                goto done;

        case QIB_IB_CFG_RXPOL_ENB: /* Get Auto-RX-polarity enable */
                lsb = SYM_LSB(IBCCtrlB_0, IB_POLARITY_REV_SUPP);
                maskr = SYM_RMASK(IBCCtrlB_0, IB_POLARITY_REV_SUPP);
                break;

        case QIB_IB_CFG_LREV_ENB: /* Get Auto-Lane-reversal enable */
                lsb = SYM_LSB(IBCCtrlB_0, IB_LANE_REV_SUPPORTED);
                maskr = SYM_RMASK(IBCCtrlB_0, IB_LANE_REV_SUPPORTED);
                break;

        case QIB_IB_CFG_LINKLATENCY:
                ret = qib_read_kreg_port(ppd, krp_ibcstatus_b) &
                        SYM_MASK(IBCStatusB_0, LinkRoundTripLatency);
                goto done;

        case QIB_IB_CFG_OP_VLS:
                ret = ppd->vls_operational;
                goto done;

        case QIB_IB_CFG_VL_HIGH_CAP:
                ret = 16;
                goto done;

        case QIB_IB_CFG_VL_LOW_CAP:
                ret = 16;
                goto done;

        case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
                ret = SYM_FIELD(ppd->cpspec->ibcctrl_a, IBCCtrlA_0,
                                OverrunThreshold);
                goto done;

        case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
                ret = SYM_FIELD(ppd->cpspec->ibcctrl_a, IBCCtrlA_0,
                                PhyerrThreshold);
                goto done;

        case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
                /* will only take effect when the link state changes */
                ret = (ppd->cpspec->ibcctrl_a &
                       SYM_MASK(IBCCtrlA_0, LinkDownDefaultState)) ?
                        IB_LINKINITCMD_SLEEP : IB_LINKINITCMD_POLL;
                goto done;

        case QIB_IB_CFG_HRTBT: /* Get Heartbeat off/enable/auto */
                lsb = IBA7322_IBC_HRTBT_LSB;
                maskr = IBA7322_IBC_HRTBT_RMASK; /* OR of AUTO and ENB */
                break;

        case QIB_IB_CFG_PMA_TICKS:
                /*
                 * 0x00 = 10x link transfer rate or 4 nsec. for 2.5Gbs
                 * Since the clock is always 250MHz, the value is 3, 1 or 0.
                 */
                if (ppd->link_speed_active == QIB_IB_QDR)
                        ret = 3;
                else if (ppd->link_speed_active == QIB_IB_DDR)
                        ret = 1;
                else
                        ret = 0;
                goto done;

        default:
                ret = -EINVAL;
                goto done;
        }
        ret = (int)((ppd->cpspec->ibcctrl_b >> lsb) & maskr);
done:
        return ret;
}

/*
 * Below again cribbed liberally from older version. Do not lean
 * heavily on it.
 */
#define IBA7322_IBC_DLIDLMC_SHIFT QIB_7322_IBCCtrlB_0_IB_DLID_LSB
#define IBA7322_IBC_DLIDLMC_MASK (QIB_7322_IBCCtrlB_0_IB_DLID_RMASK \
        | (QIB_7322_IBCCtrlB_0_IB_DLID_MASK_RMASK << 16))

static int qib_7322_set_ib_cfg(struct qib_pportdata *ppd, int which, u32 val)
{
        struct qib_devdata *dd = ppd->dd;
        u64 maskr; /* right-justified mask */
        int lsb, ret = 0;
        u16 lcmd, licmd;
        unsigned long flags;

        switch (which) {
        case QIB_IB_CFG_LIDLMC:
                /*
                 * Set LID and LMC. Combined to avoid possible hazard
                 * caller puts LMC in 16MSbits, DLID in 16LSbits of val
                 */
                lsb = IBA7322_IBC_DLIDLMC_SHIFT;
                maskr = IBA7322_IBC_DLIDLMC_MASK;
                /*
                 * For header-checking, the SLID in the packet will
                 * be masked with SendIBSLMCMask, and compared
                 * with SendIBSLIDAssignMask. Make sure we do not
                 * set any bits not covered by the mask, or we get
                 * false-positives.
                 */
                qib_write_kreg_port(ppd, krp_sendslid,
                                    val & (val >> 16) & SendIBSLIDAssignMask);
                qib_write_kreg_port(ppd, krp_sendslidmask,
                                    (val >> 16) & SendIBSLMCMask);
                break;

        case QIB_IB_CFG_LWID_ENB: /* set allowed Link-width */
                ppd->link_width_enabled = val;
                /* convert IB value to chip register value */
                if (val == IB_WIDTH_1X)
                        val = 0;
                else if (val == IB_WIDTH_4X)
                        val = 1;
                else
                        val = 3;
                maskr = SYM_RMASK(IBCCtrlB_0, IB_NUM_CHANNELS);
                lsb = SYM_LSB(IBCCtrlB_0, IB_NUM_CHANNELS);
                break;

        case QIB_IB_CFG_SPD_ENB: /* set allowed Link speeds */
                /*
                 * As with width, only write the actual register if the
                 * link is currently down, otherwise takes effect on next
                 * link change.  Since setting is being explicitly requested
                 * (via MAD or sysfs), clear autoneg failure status if speed
                 * autoneg is enabled.
                 */
                ppd->link_speed_enabled = val;
                val <<= IBA7322_IBC_SPEED_LSB;
                maskr = IBA7322_IBC_SPEED_MASK | IBA7322_IBC_IBTA_1_2_MASK |
                        IBA7322_IBC_MAX_SPEED_MASK;
                if (val & (val - 1)) {
                        /* Muliple speeds enabled */
                        val |= IBA7322_IBC_IBTA_1_2_MASK |
                                IBA7322_IBC_MAX_SPEED_MASK;
                        spin_lock_irqsave(&ppd->lflags_lock, flags);
                        ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
                        spin_unlock_irqrestore(&ppd->lflags_lock, flags);
                } else if (val & IBA7322_IBC_SPEED_QDR)
                        val |= IBA7322_IBC_IBTA_1_2_MASK;
                /* IBTA 1.2 mode + min/max + speed bits are contiguous */
                lsb = SYM_LSB(IBCCtrlB_0, IB_ENHANCED_MODE);
                break;

        case QIB_IB_CFG_RXPOL_ENB: /* set Auto-RX-polarity enable */
                lsb = SYM_LSB(IBCCtrlB_0, IB_POLARITY_REV_SUPP);
                maskr = SYM_RMASK(IBCCtrlB_0, IB_POLARITY_REV_SUPP);
                break;

        case QIB_IB_CFG_LREV_ENB: /* set Auto-Lane-reversal enable */
                lsb = SYM_LSB(IBCCtrlB_0, IB_LANE_REV_SUPPORTED);
                maskr = SYM_RMASK(IBCCtrlB_0, IB_LANE_REV_SUPPORTED);
                break;

        case QIB_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
                maskr = SYM_FIELD(ppd->cpspec->ibcctrl_a, IBCCtrlA_0,
                                  OverrunThreshold);
                if (maskr != val) {
                        ppd->cpspec->ibcctrl_a &=
                                ~SYM_MASK(IBCCtrlA_0, OverrunThreshold);
                        ppd->cpspec->ibcctrl_a |= (u64) val <<
                                SYM_LSB(IBCCtrlA_0, OverrunThreshold);
                        qib_write_kreg_port(ppd, krp_ibcctrl_a,
                                            ppd->cpspec->ibcctrl_a);
                        qib_write_kreg(dd, kr_scratch, 0ULL);
                }
                goto bail;

        case QIB_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
                maskr = SYM_FIELD(ppd->cpspec->ibcctrl_a, IBCCtrlA_0,
                                  PhyerrThreshold);
                if (maskr != val) {
                        ppd->cpspec->ibcctrl_a &=
                                ~SYM_MASK(IBCCtrlA_0, PhyerrThreshold);
                        ppd->cpspec->ibcctrl_a |= (u64) val <<
                                SYM_LSB(IBCCtrlA_0, PhyerrThreshold);
                        qib_write_kreg_port(ppd, krp_ibcctrl_a,
                                            ppd->cpspec->ibcctrl_a);
                        qib_write_kreg(dd, kr_scratch, 0ULL);
                }
                goto bail;

        case QIB_IB_CFG_PKEYS: /* update pkeys */
                maskr = (u64) ppd->pkeys[0] | ((u64) ppd->pkeys[1] << 16) |
                        ((u64) ppd->pkeys[2] << 32) |
                        ((u64) ppd->pkeys[3] << 48);
                qib_write_kreg_port(ppd, krp_partitionkey, maskr);
                goto bail;

        case QIB_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
                /* will only take effect when the link state changes */
                if (val == IB_LINKINITCMD_POLL)
                        ppd->cpspec->ibcctrl_a &=
                                ~SYM_MASK(IBCCtrlA_0, LinkDownDefaultState);
                else /* SLEEP */
                        ppd->cpspec->ibcctrl_a |=
                                SYM_MASK(IBCCtrlA_0, LinkDownDefaultState);
                qib_write_kreg_port(ppd, krp_ibcctrl_a, ppd->cpspec->ibcctrl_a);
                qib_write_kreg(dd, kr_scratch, 0ULL);
                goto bail;

        case QIB_IB_CFG_MTU: /* update the MTU in IBC */
                /*
                 * Update our housekeeping variables, and set IBC max
                 * size, same as init code; max IBC is max we allow in
                 * buffer, less the qword pbc, plus 1 for ICRC, in dwords
                 * Set even if it's unchanged, print debug message only
                 * on changes.
                 */
                val = (ppd->ibmaxlen >> 2) + 1;
                ppd->cpspec->ibcctrl_a &= ~SYM_MASK(IBCCtrlA_0, MaxPktLen);
                ppd->cpspec->ibcctrl_a |= (u64)val <<
                        SYM_LSB(IBCCtrlA_0, MaxPktLen);
                qib_write_kreg_port(ppd, krp_ibcctrl_a,
                                    ppd->cpspec->ibcctrl_a);
                qib_write_kreg(dd, kr_scratch, 0ULL);
                goto bail;

        case QIB_IB_CFG_LSTATE: /* set the IB link state */
                switch (val & 0xffff0000) {
                case IB_LINKCMD_DOWN:
                        lcmd = QLOGIC_IB_IBCC_LINKCMD_DOWN;
                        ppd->cpspec->ibmalfusesnap = 1;
                        ppd->cpspec->ibmalfsnap = read_7322_creg32_port(ppd,
                                crp_errlink);
                        if (!ppd->cpspec->ibdeltainprog &&
                            qib_compat_ddr_negotiate) {
                                ppd->cpspec->ibdeltainprog = 1;
                                ppd->cpspec->ibsymsnap =
                                        read_7322_creg32_port(ppd,
                                                              crp_ibsymbolerr);
                                ppd->cpspec->iblnkerrsnap =
                                        read_7322_creg32_port(ppd,
                                                      crp_iblinkerrrecov);
                        }
                        break;

                case IB_LINKCMD_ARMED:
                        lcmd = QLOGIC_IB_IBCC_LINKCMD_ARMED;
                        if (ppd->cpspec->ibmalfusesnap) {
                                ppd->cpspec->ibmalfusesnap = 0;
                                ppd->cpspec->ibmalfdelta +=
                                        read_7322_creg32_port(ppd,
                                                              crp_errlink) -
                                        ppd->cpspec->ibmalfsnap;
                        }
                        break;

                case IB_LINKCMD_ACTIVE:
                        lcmd = QLOGIC_IB_IBCC_LINKCMD_ACTIVE;
                        break;

                default:
                        ret = -EINVAL;
                        qib_dev_err(dd, "bad linkcmd req 0x%x\n", val >> 16);
                        goto bail;
                }
                switch (val & 0xffff) {
                case IB_LINKINITCMD_NOP:
                        licmd = 0;
                        break;

                case IB_LINKINITCMD_POLL:
                        licmd = QLOGIC_IB_IBCC_LINKINITCMD_POLL;
                        break;

                case IB_LINKINITCMD_SLEEP:
                        licmd = QLOGIC_IB_IBCC_LINKINITCMD_SLEEP;
                        break;

                case IB_LINKINITCMD_DISABLE:
                        licmd = QLOGIC_IB_IBCC_LINKINITCMD_DISABLE;
                        ppd->cpspec->chase_end = 0;
                        /*
                         * stop state chase counter and timer, if running.
                         * wait forpending timer, but don't clear .data (ppd)!
                         */
                        if (ppd->cpspec->chase_timer.expires) {
                                del_timer_sync(&ppd->cpspec->chase_timer);
                                ppd->cpspec->chase_timer.expires = 0;
                        }
                        break;

                default:
                        ret = -EINVAL;
                        qib_dev_err(dd, "bad linkinitcmd req 0x%x\n",
                                    val & 0xffff);
                        goto bail;
                }
                qib_set_ib_7322_lstate(ppd, lcmd, licmd);
                goto bail;

        case QIB_IB_CFG_OP_VLS:
                if (ppd->vls_operational != val) {
                        ppd->vls_operational = val;
                        set_vls(ppd);
                }
                goto bail;

        case QIB_IB_CFG_VL_HIGH_LIMIT:
                qib_write_kreg_port(ppd, krp_highprio_limit, val);
                goto bail;

        case QIB_IB_CFG_HRTBT: /* set Heartbeat off/enable/auto */
                if (val > 3) {
                        ret = -EINVAL;
                        goto bail;
                }
                lsb = IBA7322_IBC_HRTBT_LSB;
                maskr = IBA7322_IBC_HRTBT_RMASK; /* OR of AUTO and ENB */
                break;

        case QIB_IB_CFG_PORT:
                /* val is the port number of the switch we are connected to. */
                if (ppd->dd->cspec->r1) {
                        cancel_delayed_work(&ppd->cpspec->ipg_work);
                        ppd->cpspec->ipg_tries = 0;
                }
                goto bail;

        default:
                ret = -EINVAL;
                goto bail;
        }
        ppd->cpspec->ibcctrl_b &= ~(maskr << lsb);
        ppd->cpspec->ibcctrl_b |= (((u64) val & maskr) << lsb);
        qib_write_kreg_port(ppd, krp_ibcctrl_b, ppd->cpspec->ibcctrl_b);
        qib_write_kreg(dd, kr_scratch, 0);
bail:
        return ret;
}

static int qib_7322_set_loopback(struct qib_pportdata *ppd, const char *what)
{
        int ret = 0;
        u64 val, ctrlb;

        /* only IBC loopback, may add serdes and xgxs loopbacks later */
        if (!strncmp(what, "ibc", 3)) {
                ppd->cpspec->ibcctrl_a |= SYM_MASK(IBCCtrlA_0,
                                                       Loopback);
                val = 0; /* disable heart beat, so link will come up */
                qib_devinfo(ppd->dd->pcidev, "Enabling IB%u:%u IBC loopback\n",
                         ppd->dd->unit, ppd->port);
        } else if (!strncmp(what, "off", 3)) {
                ppd->cpspec->ibcctrl_a &= ~SYM_MASK(IBCCtrlA_0,
                                                        Loopback);
                /* enable heart beat again */
                val = IBA7322_IBC_HRTBT_RMASK << IBA7322_IBC_HRTBT_LSB;
                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_port(ppd, krp_ibcctrl_a,
                                    ppd->cpspec->ibcctrl_a);
                ctrlb = ppd->cpspec->ibcctrl_b & ~(IBA7322_IBC_HRTBT_MASK
                                             << IBA7322_IBC_HRTBT_LSB);
                ppd->cpspec->ibcctrl_b = ctrlb | val;
                qib_write_kreg_port(ppd, krp_ibcctrl_b,
                                    ppd->cpspec->ibcctrl_b);
                qib_write_kreg(ppd->dd, kr_scratch, 0);
        }
        return ret;
}

static void get_vl_weights(struct qib_pportdata *ppd, unsigned regno,
                           struct ib_vl_weight_elem *vl)
{
        unsigned i;

        for (i = 0; i < 16; i++, regno++, vl++) {
                u32 val = qib_read_kreg_port(ppd, regno);

                vl->vl = (val >> SYM_LSB(LowPriority0_0, VirtualLane)) &
                        SYM_RMASK(LowPriority0_0, VirtualLane);
                vl->weight = (val >> SYM_LSB(LowPriority0_0, Weight)) &
                        SYM_RMASK(LowPriority0_0, Weight);
        }
}

static void set_vl_weights(struct qib_pportdata *ppd, unsigned regno,
                           struct ib_vl_weight_elem *vl)
{
        unsigned i;

        for (i = 0; i < 16; i++, regno++, vl++) {
                u64 val;

                val = ((vl->vl & SYM_RMASK(LowPriority0_0, VirtualLane)) <<
                        SYM_LSB(LowPriority0_0, VirtualLane)) |
                      ((vl->weight & SYM_RMASK(LowPriority0_0, Weight)) <<
                        SYM_LSB(LowPriority0_0, Weight));
                qib_write_kreg_port(ppd, regno, val);
        }
        if (!(ppd->p_sendctrl & SYM_MASK(SendCtrl_0, IBVLArbiterEn))) {
                struct qib_devdata *dd = ppd->dd;
                unsigned long flags;

                spin_lock_irqsave(&dd->sendctrl_lock, flags);
                ppd->p_sendctrl |= SYM_MASK(SendCtrl_0, IBVLArbiterEn);
                qib_write_kreg_port(ppd, krp_sendctrl, ppd->p_sendctrl);
                qib_write_kreg(dd, kr_scratch, 0);
                spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
        }
}

static int qib_7322_get_ib_table(struct qib_pportdata *ppd, int which, void *t)
{
        switch (which) {
        case QIB_IB_TBL_VL_HIGH_ARB:
                get_vl_weights(ppd, krp_highprio_0, t);
                break;

        case QIB_IB_TBL_VL_LOW_ARB:
                get_vl_weights(ppd, krp_lowprio_0, t);
                break;

        default:
                return -EINVAL;
        }
        return 0;
}

static int qib_7322_set_ib_table(struct qib_pportdata *ppd, int which, void *t)
{
        switch (which) {
        case QIB_IB_TBL_VL_HIGH_ARB:
                set_vl_weights(ppd, krp_highprio_0, t);
                break;

        case QIB_IB_TBL_VL_LOW_ARB:
                set_vl_weights(ppd, krp_lowprio_0, t);
                break;

        default:
                return -EINVAL;
        }
        return 0;
}

static void qib_update_7322_usrhead(struct qib_ctxtdata *rcd, u64 hd,
                                    u32 updegr, u32 egrhd, u32 npkts)
{
        /*
         * Need to write timeout register before updating rcvhdrhead to ensure
         * that the timer is enabled on reception of a packet.
         */
        if (hd >> IBA7322_HDRHEAD_PKTINT_SHIFT)
                adjust_rcv_timeout(rcd, npkts);
        qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
        qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
        if (updegr)
                qib_write_ureg(rcd->dd, ur_rcvegrindexhead, egrhd, rcd->ctxt);
}

static u32 qib_7322_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;
}

#define RCVCTRL_COMMON_MODS (QIB_RCVCTRL_CTXT_ENB | \
        QIB_RCVCTRL_CTXT_DIS | \
        QIB_RCVCTRL_TIDFLOW_ENB | \
        QIB_RCVCTRL_TIDFLOW_DIS | \
        QIB_RCVCTRL_TAILUPD_ENB | \
        QIB_RCVCTRL_TAILUPD_DIS | \
        QIB_RCVCTRL_INTRAVAIL_ENB | \
        QIB_RCVCTRL_INTRAVAIL_DIS | \
        QIB_RCVCTRL_BP_ENB | \
        QIB_RCVCTRL_BP_DIS)

#define RCVCTRL_PORT_MODS (QIB_RCVCTRL_CTXT_ENB | \
        QIB_RCVCTRL_CTXT_DIS | \
        QIB_RCVCTRL_PKEY_DIS | \
        QIB_RCVCTRL_PKEY_ENB)

/*
 * Modify the RCVCTRL register in chip-specific way. This
 * is a function because bit positions and (future) register
 * location is chip-specifc, but the needed operations are
 * generic. <op> is a bit-mask because we often want to
 * do multiple modifications.
 */
static void rcvctrl_7322_mod(struct qib_pportdata *ppd, unsigned int op,
                             int ctxt)
{
        struct qib_devdata *dd = ppd->dd;
        struct qib_ctxtdata *rcd;
        u64 mask, val;
        unsigned long flags;

        spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);

        if (op & QIB_RCVCTRL_TIDFLOW_ENB)
                dd->rcvctrl |= SYM_MASK(RcvCtrl, TidFlowEnable);
        if (op & QIB_RCVCTRL_TIDFLOW_DIS)
                dd->rcvctrl &= ~SYM_MASK(RcvCtrl, TidFlowEnable);
        if (op & QIB_RCVCTRL_TAILUPD_ENB)
                dd->rcvctrl |= SYM_MASK(RcvCtrl, TailUpd);
        if (op & QIB_RCVCTRL_TAILUPD_DIS)
                dd->rcvctrl &= ~SYM_MASK(RcvCtrl, TailUpd);
        if (op & QIB_RCVCTRL_PKEY_ENB)
                ppd->p_rcvctrl &= ~SYM_MASK(RcvCtrl_0, RcvPartitionKeyDisable);
        if (op & QIB_RCVCTRL_PKEY_DIS)
                ppd->p_rcvctrl |= SYM_MASK(RcvCtrl_0, RcvPartitionKeyDisable);
        if (ctxt < 0) {
                mask = (1ULL << dd->ctxtcnt) - 1;
                rcd = NULL;
        } else {
                mask = (1ULL << ctxt);
                rcd = dd->rcd[ctxt];
        }
        if ((op & QIB_RCVCTRL_CTXT_ENB) && rcd) {
                ppd->p_rcvctrl |=
                        (mask << SYM_LSB(RcvCtrl_0, ContextEnableKernel));
                if (!(dd->flags & QIB_NODMA_RTAIL)) {
                        op |= QIB_RCVCTRL_TAILUPD_ENB; /* need reg write */
                        dd->rcvctrl |= SYM_MASK(RcvCtrl, TailUpd);
                }
                /* Write these registers before the context is enabled. */
                qib_write_kreg_ctxt(dd, krc_rcvhdrtailaddr, ctxt,
                                    rcd->rcvhdrqtailaddr_phys);
                qib_write_kreg_ctxt(dd, krc_rcvhdraddr, ctxt,
                                    rcd->rcvhdrq_phys);
                rcd->seq_cnt = 1;
        }
        if (op & QIB_RCVCTRL_CTXT_DIS)
                ppd->p_rcvctrl &=
                        ~(mask << SYM_LSB(RcvCtrl_0, ContextEnableKernel));
        if (op & QIB_RCVCTRL_BP_ENB)
                dd->rcvctrl |= mask << SYM_LSB(RcvCtrl, dontDropRHQFull);
        if (op & QIB_RCVCTRL_BP_DIS)
                dd->rcvctrl &= ~(mask << SYM_LSB(RcvCtrl, dontDropRHQFull));
        if (op & QIB_RCVCTRL_INTRAVAIL_ENB)
                dd->rcvctrl |= (mask << SYM_LSB(RcvCtrl, IntrAvail));
        if (op & QIB_RCVCTRL_INTRAVAIL_DIS)
                dd->rcvctrl &= ~(mask << SYM_LSB(RcvCtrl, IntrAvail));
        /*
         * Decide which registers to write depending on the ops enabled.
         * Special case is "flush" (no bits set at all)
         * which needs to write both.
         */
        if (op == 0 || (op & RCVCTRL_COMMON_MODS))
                qib_write_kreg(dd, kr_rcvctrl, dd->rcvctrl);
        if (op == 0 || (op & RCVCTRL_PORT_MODS))
                qib_write_kreg_port(ppd, krp_rcvctrl, ppd->p_rcvctrl);
        if ((op & QIB_RCVCTRL_CTXT_ENB) && dd->rcd[ctxt]) {
                /*
                 * 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);

                /* be sure enabling write seen; hd/tl should be 0 */
                (void) qib_read_kreg32(dd, kr_scratch);
                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);
        } else if ((op & QIB_RCVCTRL_INTRAVAIL_ENB) &&
                dd->rcd[ctxt] && dd->rhdrhead_intr_off) {
                /* arm rcv interrupt */
                val = dd->rcd[ctxt]->head | dd->rhdrhead_intr_off;
                qib_write_ureg(dd, ur_rcvhdrhead, val, ctxt);
        }
        if (op & QIB_RCVCTRL_CTXT_DIS) {
                unsigned f;

                /* Now that the context is disabled, clear these registers. */
                if (ctxt >= 0) {
                        qib_write_kreg_ctxt(dd, krc_rcvhdrtailaddr, ctxt, 0);
                        qib_write_kreg_ctxt(dd, krc_rcvhdraddr, ctxt, 0);
                        for (f = 0; f < NUM_TIDFLOWS_CTXT; f++)
                                qib_write_ureg(dd, ur_rcvflowtable + f,
                                               TIDFLOW_ERRBITS, ctxt);
                } else {
                        unsigned i;

                        for (i = 0; i < dd->cfgctxts; i++) {
                                qib_write_kreg_ctxt(dd, krc_rcvhdrtailaddr,
                                                    i, 0);
                                qib_write_kreg_ctxt(dd, krc_rcvhdraddr, i, 0);
                                for (f = 0; f < NUM_TIDFLOWS_CTXT; f++)
                                        qib_write_ureg(dd, ur_rcvflowtable + f,
                                                       TIDFLOW_ERRBITS, i);
                        }
                }
        }
        spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);
}

/*
 * Modify the SENDCTRL register in chip-specific way. This
 * is a function where there are multiple such registers with
 * slightly different layouts.
 * The chip doesn't allow back-to-back sendctrl writes, so write
 * the scratch register after writing sendctrl.
 *
 * Which register is written depends on the operation.
 * Most operate on the common register, while
 * SEND_ENB and SEND_DIS operate on the per-port ones.
 * SEND_ENB is included in common because it can change SPCL_TRIG
 */
#define SENDCTRL_COMMON_MODS (\
        QIB_SENDCTRL_CLEAR | \
        QIB_SENDCTRL_AVAIL_DIS | \
        QIB_SENDCTRL_AVAIL_ENB | \
        QIB_SENDCTRL_AVAIL_BLIP | \
        QIB_SENDCTRL_DISARM | \
        QIB_SENDCTRL_DISARM_ALL | \
        QIB_SENDCTRL_SEND_ENB)

#define SENDCTRL_PORT_MODS (\
        QIB_SENDCTRL_CLEAR | \
        QIB_SENDCTRL_SEND_ENB | \
        QIB_SENDCTRL_SEND_DIS | \
        QIB_SENDCTRL_FLUSH)

static void sendctrl_7322_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 dd ones that are "sticky", saved in shadow */
        if (op & QIB_SENDCTRL_CLEAR)
                dd->sendctrl = 0;
        if (op & QIB_SENDCTRL_AVAIL_DIS)
                dd->sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
        else if (op & QIB_SENDCTRL_AVAIL_ENB) {
                dd->sendctrl |= SYM_MASK(SendCtrl, SendBufAvailUpd);
                if (dd->flags & QIB_USE_SPCL_TRIG)
                        dd->sendctrl |= SYM_MASK(SendCtrl, SpecialTriggerEn);
        }

        /* Then the ppd ones that are "sticky", saved in shadow */
        if (op & QIB_SENDCTRL_SEND_DIS)
                ppd->p_sendctrl &= ~SYM_MASK(SendCtrl_0, SendEnable);
        else if (op & QIB_SENDCTRL_SEND_ENB)
                ppd->p_sendctrl |= SYM_MASK(SendCtrl_0, SendEnable);

        if (op & QIB_SENDCTRL_DISARM_ALL) {
                u32 i, last;

                tmp_dd_sendctrl = dd->sendctrl;
                last = dd->piobcnt2k + dd->piobcnt4k + NUM_VL15_BUFS;
                /*
                 * Disarm any buffers that are not yet launched,
                 * disabling updates until done.
                 */
                tmp_dd_sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);
                for (i = 0; i < last; i++) {
                        qib_write_kreg(dd, kr_sendctrl,
                                       tmp_dd_sendctrl |
                                       SYM_MASK(SendCtrl, Disarm) | i);
                        qib_write_kreg(dd, kr_scratch, 0);
                }
        }

        if (op & QIB_SENDCTRL_FLUSH) {
                u64 tmp_ppd_sendctrl = ppd->p_sendctrl;

                /*
                 * Now drain all the fifos.  The Abort bit should never be
                 * needed, so for now, at least, we don't use it.
                 */
                tmp_ppd_sendctrl |=
                        SYM_MASK(SendCtrl_0, TxeDrainRmFifo) |
                        SYM_MASK(SendCtrl_0, TxeDrainLaFifo) |
                        SYM_MASK(SendCtrl_0, TxeBypassIbc);
                qib_write_kreg_port(ppd, krp_sendctrl, tmp_ppd_sendctrl);
                qib_write_kreg(dd, kr_scratch, 0);
        }

        tmp_dd_sendctrl = dd->sendctrl;

        if (op & QIB_SENDCTRL_DISARM)
                tmp_dd_sendctrl |= SYM_MASK(SendCtrl, Disarm) |
                        ((op & QIB_7322_SendCtrl_DisarmSendBuf_RMASK) <<
                         SYM_LSB(SendCtrl, DisarmSendBuf));
        if ((op & QIB_SENDCTRL_AVAIL_BLIP) &&
            (dd->sendctrl & SYM_MASK(SendCtrl, SendBufAvailUpd)))
                tmp_dd_sendctrl &= ~SYM_MASK(SendCtrl, SendBufAvailUpd);

        if (op == 0 || (op & SENDCTRL_COMMON_MODS)) {
                qib_write_kreg(dd, kr_sendctrl, tmp_dd_sendctrl);
                qib_write_kreg(dd, kr_scratch, 0);
        }

        if (op == 0 || (op & SENDCTRL_PORT_MODS)) {
                qib_write_kreg_port(ppd, krp_sendctrl, ppd->p_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);
        }
}

#define _PORT_VIRT_FLAG 0x8000U /* "virtual", need adjustments */
#define _PORT_64BIT_FLAG 0x10000U /* not "virtual", but 64bit */
#define _PORT_CNTR_IDXMASK 0x7fffU /* mask off flags above */

/**
 * qib_portcntr_7322 - read a per-port chip counter
 * @ppd: the qlogic_ib pport
 * @creg: the counter to read (not a chip offset)
 */
static u64 qib_portcntr_7322(struct qib_pportdata *ppd, u32 reg)
{
        struct qib_devdata *dd = ppd->dd;
        u64 ret = 0ULL;
        u16 creg;
        /* 0xffff for unimplemented or synthesized counters */
        static const u32 xlator[] = {
                [QIBPORTCNTR_PKTSEND] = crp_pktsend | _PORT_64BIT_FLAG,
                [QIBPORTCNTR_WORDSEND] = crp_wordsend | _PORT_64BIT_FLAG,
                [QIBPORTCNTR_PSXMITDATA] = crp_psxmitdatacount,
                [QIBPORTCNTR_PSXMITPKTS] = crp_psxmitpktscount,
                [QIBPORTCNTR_PSXMITWAIT] = crp_psxmitwaitcount,
                [QIBPORTCNTR_SENDSTALL] = crp_sendstall,
                [QIBPORTCNTR_PKTRCV] = crp_pktrcv | _PORT_64BIT_FLAG,
                [QIBPORTCNTR_PSRCVDATA] = crp_psrcvdatacount,
                [QIBPORTCNTR_PSRCVPKTS] = crp_psrcvpktscount,
                [QIBPORTCNTR_RCVEBP] = crp_rcvebp,
                [QIBPORTCNTR_RCVOVFL] = crp_rcvovfl,
                [QIBPORTCNTR_WORDRCV] = crp_wordrcv | _PORT_64BIT_FLAG,
                [QIBPORTCNTR_RXDROPPKT] = 0xffff, /* not needed  for 7322 */
                [QIBPORTCNTR_RXLOCALPHYERR] = crp_rxotherlocalphyerr,
                [QIBPORTCNTR_RXVLERR] = crp_rxvlerr,
                [QIBPORTCNTR_ERRICRC] = crp_erricrc,
                [QIBPORTCNTR_ERRVCRC] = crp_errvcrc,
                [QIBPORTCNTR_ERRLPCRC] = crp_errlpcrc,
                [QIBPORTCNTR_BADFORMAT] = crp_badformat,
                [QIBPORTCNTR_ERR_RLEN] = crp_err_rlen,
                [QIBPORTCNTR_IBSYMBOLERR] = crp_ibsymbolerr,
                [QIBPORTCNTR_INVALIDRLEN] = crp_invalidrlen,
                [QIBPORTCNTR_UNSUPVL] = crp_txunsupvl,
                [QIBPORTCNTR_EXCESSBUFOVFL] = crp_excessbufferovfl,
                [QIBPORTCNTR_ERRLINK] = crp_errlink,
                [QIBPORTCNTR_IBLINKDOWN] = crp_iblinkdown,
                [QIBPORTCNTR_IBLINKERRRECOV] = crp_iblinkerrrecov,
                [QIBPORTCNTR_LLI] = crp_locallinkintegrityerr,
                [QIBPORTCNTR_VL15PKTDROP] = crp_vl15droppedpkt,
                [QIBPORTCNTR_ERRPKEY] = crp_errpkey,
                /*
                 * the next 3 aren't really counters, but were implemented
                 * as counters in older chips, so still get accessed as
                 * though they were counters from this code.
                 */
                [QIBPORTCNTR_PSINTERVAL] = krp_psinterval,
                [QIBPORTCNTR_PSSTART] = krp_psstart,
                [QIBPORTCNTR_PSSTAT] = krp_psstat,
                /* pseudo-counter, summed for all ports */
                [QIBPORTCNTR_KHDROVFL] = 0xffff,
        };

        if (reg >= ARRAY_SIZE(xlator)) {
                qib_devinfo(ppd->dd->pcidev,
                         "Unimplemented portcounter %u\n", reg);
                goto done;
        }
        creg = xlator[reg] & _PORT_CNTR_IDXMASK;

        /* handle non-counters and special cases first */
        if (reg == QIBPORTCNTR_KHDROVFL) {
                int i;

                /* sum over all kernel contexts (skip if mini_init) */
                for (i = 0; dd->rcd && i < dd->first_user_ctxt; i++) {
                        struct qib_ctxtdata *rcd = dd->rcd[i];

                        if (!rcd || rcd->ppd != ppd)
                                continue;
                        ret += read_7322_creg32(dd, cr_base_egrovfl + i);
                }
                goto done;
        } else if (reg == QIBPORTCNTR_RXDROPPKT) {
                /*
                 * Used as part of the synthesis of port_rcv_errors
                 * in the verbs code for IBTA counters.  Not needed for 7322,
                 * because all the errors are already counted by other cntrs.
                 */
                goto done;
        } else if (reg == QIBPORTCNTR_PSINTERVAL ||
                   reg == QIBPORTCNTR_PSSTART || reg == QIBPORTCNTR_PSSTAT) {
                /* were counters in older chips, now per-port kernel regs */
                ret = qib_read_kreg_port(ppd, creg);
                goto done;
        }

        /*
         * Only fast increment counters are 64 bits; use 32 bit reads to
         * avoid two independent reads when on Opteron.
         */
        if (xlator[reg] & _PORT_64BIT_FLAG)
                ret = read_7322_creg_port(ppd, creg);
        else
                ret = read_7322_creg32_port(ppd, creg);
        if (creg == crp_ibsymbolerr) {
                if (ppd->cpspec->ibdeltainprog)
                        ret -= ret - ppd->cpspec->ibsymsnap;
                ret -= ppd->cpspec->ibsymdelta;
        } else if (creg == crp_iblinkerrrecov) {
                if (ppd->cpspec->ibdeltainprog)
                        ret -= ret - ppd->cpspec->iblnkerrsnap;
                ret -= ppd->cpspec->iblnkerrdelta;
        } else if (creg == crp_errlink)
                ret -= ppd->cpspec->ibmalfdelta;
        else if (creg == crp_iblinkdown)
                ret += ppd->cpspec->iblnkdowndelta;
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.
 * cntr7322indices contains the corresponding register indices.
 */
static const char cntr7322names[] =
        "Interrupts\n"
        "HostBusStall\n"
        "E RxTIDFull\n"
        "RxTIDInvalid\n"
        "RxTIDFloDrop\n" /* 7322 only */
        "Ctxt0EgrOvfl\n"
        "Ctxt1EgrOvfl\n"
        "Ctxt2EgrOvfl\n"
        "Ctxt3EgrOvfl\n"
        "Ctxt4EgrOvfl\n"
        "Ctxt5EgrOvfl\n"
        "Ctxt6EgrOvfl\n"
        "Ctxt7EgrOvfl\n"
        "Ctxt8EgrOvfl\n"
        "Ctxt9EgrOvfl\n"
        "Ctx10EgrOvfl\n"
        "Ctx11EgrOvfl\n"
        "Ctx12EgrOvfl\n"
        "Ctx13EgrOvfl\n"
        "Ctx14EgrOvfl\n"
        "Ctx15EgrOvfl\n"
        "Ctx16EgrOvfl\n"
        "Ctx17EgrOvfl\n"
        ;

static const u32 cntr7322indices[] = {
        cr_lbint | _PORT_64BIT_FLAG,
        cr_lbstall | _PORT_64BIT_FLAG,
        cr_tidfull,
        cr_tidinvalid,
        cr_rxtidflowdrop,
        cr_base_egrovfl + 0,
        cr_base_egrovfl + 1,
        cr_base_egrovfl + 2,
        cr_base_egrovfl + 3,
        cr_base_egrovfl + 4,
        cr_base_egrovfl + 5,
        cr_base_egrovfl + 6,
        cr_base_egrovfl + 7,
        cr_base_egrovfl + 8,
        cr_base_egrovfl + 9,
        cr_base_egrovfl + 10,
        cr_base_egrovfl + 11,
        cr_base_egrovfl + 12,
        cr_base_egrovfl + 13,
        cr_base_egrovfl + 14,
        cr_base_egrovfl + 15,
        cr_base_egrovfl + 16,
        cr_base_egrovfl + 17,
};

/*
 * same as cntr7322names and cntr7322indices, but for port-specific counters.
 * portcntr7322indices is somewhat complicated by some registers needing
 * adjustments of various kinds, and those are ORed with _PORT_VIRT_FLAG
 */
static const char portcntr7322names[] =
        "TxPkt\n"
        "TxFlowPkt\n"
        "TxWords\n"
        "RxPkt\n"
        "RxFlowPkt\n"
        "RxWords\n"
        "TxFlowStall\n"
        "TxDmaDesc\n"  /* 7220 and 7322-only */
        "E RxDlidFltr\n"  /* 7220 and 7322-only */
        "IBStatusChng\n"
        "IBLinkDown\n"
        "IBLnkRecov\n"
        "IBRxLinkErr\n"
        "IBSymbolErr\n"
        "RxLLIErr\n"
        "RxBadFormat\n"
        "RxBadLen\n"
        "RxBufOvrfl\n"
        "RxEBP\n"
        "RxFlowCtlErr\n"
        "RxICRCerr\n"
        "RxLPCRCerr\n"
        "RxVCRCerr\n"
        "RxInvalLen\n"
        "RxInvalPKey\n"
        "RxPktDropped\n"
        "TxBadLength\n"
        "TxDropped\n"
        "TxInvalLen\n"
        "TxUnderrun\n"
        "TxUnsupVL\n"
        "RxLclPhyErr\n" /* 7220 and 7322-only from here down */
        "RxVL15Drop\n"
        "RxVlErr\n"
        "XcessBufOvfl\n"
        "RxQPBadCtxt\n" /* 7322-only from here down */
        "TXBadHeader\n"
        ;

static const u32 portcntr7322indices[] = {
        QIBPORTCNTR_PKTSEND | _PORT_VIRT_FLAG,
        crp_pktsendflow,
        QIBPORTCNTR_WORDSEND | _PORT_VIRT_FLAG,
        QIBPORTCNTR_PKTRCV | _PORT_VIRT_FLAG,
        crp_pktrcvflowctrl,
        QIBPORTCNTR_WORDRCV | _PORT_VIRT_FLAG,
        QIBPORTCNTR_SENDSTALL | _PORT_VIRT_FLAG,
        crp_txsdmadesc | _PORT_64BIT_FLAG,
        crp_rxdlidfltr,
        crp_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,
        crp_rcvflowctrlviol,
        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,
        crp_txminmaxlenerr,
        crp_txdroppedpkt,
        crp_txlenerr,
        crp_txunderrun,
        crp_txunsupvl,
        QIBPORTCNTR_RXLOCALPHYERR | _PORT_VIRT_FLAG,
        QIBPORTCNTR_VL15PKTDROP | _PORT_VIRT_FLAG,
        QIBPORTCNTR_RXVLERR | _PORT_VIRT_FLAG,
        QIBPORTCNTR_EXCESSBUFOVFL | _PORT_VIRT_FLAG,
        crp_rxqpinvalidctxt,
        crp_txhdrerr,
};

/* do all the setup to make the counter reads efficient later */
static void init_7322_cntrnames(struct qib_devdata *dd)
{
        int i, j = 0;
        char *s;

        for (i = 0, s = (char *)cntr7322names; 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(cntr7322names) - 1;
        else
                dd->cspec->cntrnamelen = 1 + s - cntr7322names;
        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 *)portcntr7322names; s; i++)
                s = strchr(s + 1, '\n');
        dd->cspec->nportcntrs = i - 1;
        dd->cspec->portcntrnamelen = sizeof(portcntr7322names) - 1;
        for (i = 0; i < dd->num_pports; ++i) {
                dd->pport[i].cpspec->portcntrs = kmalloc(dd->cspec->nportcntrs
                        * sizeof(u64), GFP_KERNEL);
                if (!dd->pport[i].cpspec->portcntrs)
                        qib_dev_err(dd, "Failed allocation for"
                                    " portcounters\n");
        }
}

static u32 qib_read_7322cntrs(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 *) cntr7322names;
        } else {
                u64 *cntr = dd->cspec->cntrs;
                int i;

                ret = dd->cspec->ncntrs * sizeof(u64);
                if (!cntr || pos >= ret) {
                        /* everything read, or couldn't get memory */
                        ret = 0;
                        goto done;
                }
                *cntrp = cntr;
                for (i = 0; i < dd->cspec->ncntrs; i++)
                        if (cntr7322indices[i] & _PORT_64BIT_FLAG)
                                *cntr++ = read_7322_creg(dd,
                                                         cntr7322indices[i] &
                                                         _PORT_CNTR_IDXMASK);
                        else
                                *cntr++ = read_7322_creg32(dd,
                                                           cntr7322indices[i]);
        }
done:
        return ret;
}

static u32 qib_read_7322portcntrs(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 *)portcntr7322names;
        } else {
                struct qib_pportdata *ppd = &dd->pport[port];
                u64 *cntr = ppd->cpspec->portcntrs;
                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 (portcntr7322indices[i] & _PORT_VIRT_FLAG)
                                *cntr++ = qib_portcntr_7322(ppd,
                                        portcntr7322indices[i] &
                                        _PORT_CNTR_IDXMASK);
                        else if (portcntr7322indices[i] & _PORT_64BIT_FLAG)
                                *cntr++ = read_7322_creg_port(ppd,
                                           portcntr7322indices[i] &
                                            _PORT_CNTR_IDXMASK);
                        else
                                *cntr++ = read_7322_creg32_port(ppd,
                                           portcntr7322indices[i]);
                }
        }
done:
        return ret;
}

/**
 * qib_get_7322_faststats - get word counters from chip before they overflow
 * @opaque - contains a pointer to the qlogic_ib device qib_devdata
 *
 * VESTIGIAL IBA7322 has no "small fast counters", so the only
 * real purpose of this function is to maintain the notion of
 * "active time", which in turn is only logged into the eeprom,
 * which we don;t have, yet, for 7322-based boards.
 *
 * called from add_timer
 */
static void qib_get_7322_faststats(unsigned long opaque)
{
        struct qib_devdata *dd = (struct qib_devdata *) opaque;
        struct qib_pportdata *ppd;
        unsigned long flags;
        u64 traffic_wds;
        int pidx;

        for (pidx = 0; pidx < dd->num_pports; ++pidx) {
                ppd = dd->pport + pidx;

                /*
                 * If port isn't enabled or not operational ports, or
                 * diags is running (can cause memory diags to fail)
                 * skip this port this time.
                 */
                if (!ppd->link_speed_supported || !(dd->flags & QIB_INITTED)
                    || dd->diag_client)
                        continue;

                /*
                 * 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_7322(ppd, QIBPORTCNTR_WORDRCV) +
                        qib_portcntr_7322(ppd, QIBPORTCNTR_WORDSEND);
                spin_lock_irqsave(&ppd->dd->eep_st_lock, flags);
                traffic_wds -= ppd->dd->traffic_wds;
                ppd->dd->traffic_wds += traffic_wds;
                if (traffic_wds >= QIB_TRAFFIC_ACTIVE_THRESHOLD)
                        atomic_add(ACTIVITY_TIMER, &ppd->dd->active_time);
                spin_unlock_irqrestore(&ppd->dd->eep_st_lock, flags);
                if (ppd->cpspec->qdr_dfe_on && (ppd->link_speed_active &
                                                QIB_IB_QDR) &&
                    (ppd->lflags & (QIBL_LINKINIT | QIBL_LINKARMED |
                                    QIBL_LINKACTIVE)) &&
                    ppd->cpspec->qdr_dfe_time &&
                    time_after64(get_jiffies_64(), ppd->cpspec->qdr_dfe_time)) {
                        ppd->cpspec->qdr_dfe_on = 0;

                        qib_write_kreg_port(ppd, krp_static_adapt_dis(2),
                                            ppd->dd->cspec->r1 ?
                                            QDR_STATIC_ADAPT_INIT_R1 :
                                            QDR_STATIC_ADAPT_INIT);
                        force_h1(ppd);
                }
        }
        mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
}

/*
 * If we were using MSIx, try to fallback to INTx.
 */
static int qib_7322_intr_fallback(struct qib_devdata *dd)
{
        if (!dd->cspec->num_msix_entries)
                return 0; /* already using INTx */

        qib_devinfo(dd->pcidev, "MSIx interrupt not detected,"
                 " trying INTx interrupts\n");
        qib_7322_nomsix(dd);
        qib_enable_intx(dd->pcidev);
        qib_setup_7322_interrupt(dd, 0);
        return 1;
}

/*
 * Reset the XGXS (between serdes and IBC).  Slightly less intrusive
 * than resetting the IBC or external link state, and useful in some
 * cases to cause some retraining.  To do this right, we reset IBC
 * as well, then return to previous state (which may be still in reset)
 * NOTE: some callers of this "know" this writes the current value
 * of cpspec->ibcctrl_a as part of it's operation, so if that changes,
 * check all callers.
 */
static void qib_7322_mini_pcs_reset(struct qib_pportdata *ppd)
{
        u64 val;
        struct qib_devdata *dd = ppd->dd;
        const u64 reset_bits = SYM_MASK(IBPCSConfig_0, xcv_rreset) |
                SYM_MASK(IBPCSConfig_0, xcv_treset) |
                SYM_MASK(IBPCSConfig_0, tx_rx_reset);

        val = qib_read_kreg_port(ppd, krp_ib_pcsconfig);
        qib_write_kreg(dd, kr_hwerrmask,
                       dd->cspec->hwerrmask & ~HWE_MASK(statusValidNoEop));
        qib_write_kreg_port(ppd, krp_ibcctrl_a,
                            ppd->cpspec->ibcctrl_a &
                            ~SYM_MASK(IBCCtrlA_0, IBLinkEn));

        qib_write_kreg_port(ppd, krp_ib_pcsconfig, val | reset_bits);
        qib_read_kreg32(dd, kr_scratch);
        qib_write_kreg_port(ppd, krp_ib_pcsconfig, val & ~reset_bits);
        qib_write_kreg_port(ppd, krp_ibcctrl_a, ppd->cpspec->ibcctrl_a);
        qib_write_kreg(dd, kr_scratch, 0ULL);
        qib_write_kreg(dd, kr_hwerrclear,
                       SYM_MASK(HwErrClear, statusValidNoEopClear));
        qib_write_kreg(dd, kr_hwerrmask, dd->cspec->hwerrmask);
}

/*
 * This code for non-IBTA-compliant IB speed negotiation is only known to
 * work for the SDR to DDR transition, and only between an HCA and a switch
 * with recent firmware.  It is based on observed heuristics, rather than
 * actual knowledge of the non-compliant speed negotiation.
 * It has a number of hard-coded fields, since the hope is to rewrite this
 * when a spec is available on how the negoation is intended to work.
 */
static void autoneg_7322_sendpkt(struct qib_pportdata *ppd, u32 *hdr,
                                 u32 dcnt, u32 *data)
{
        int i;
        u64 pbc;
        u32 __iomem *piobuf;
        u32 pnum, control, len;
        struct qib_devdata *dd = ppd->dd;

        i = 0;
        len = 7 + dcnt + 1; /* 7 dword header, dword data, icrc */
        control = qib_7322_setpbc_control(ppd, len, 0, 15);
        pbc = ((u64) control << 32) | len;
        while (!(piobuf = qib_7322_getsendbuf(ppd, pbc, &pnum))) {
                if (i++ > 15)
                        return;
                udelay(2);
        }
        /* disable header check on this packet, since it can't be valid */
        dd->f_txchk_change(dd, pnum, 1, TXCHK_CHG_TYPE_DIS1, NULL);
        writeq(pbc, piobuf);
        qib_flush_wc();
        qib_pio_copy(piobuf + 2, hdr, 7);
        qib_pio_copy(piobuf + 9, data, dcnt);
        if (dd->flags & QIB_USE_SPCL_TRIG) {
                u32 spcl_off = (pnum >= dd->piobcnt2k) ? 2047 : 1023;

                qib_flush_wc();
                __raw_writel(0xaebecede, piobuf + spcl_off);
        }
        qib_flush_wc();
        qib_sendbuf_done(dd, pnum);
        /* and re-enable hdr check */
        dd->f_txchk_change(dd, pnum, 1, TXCHK_CHG_TYPE_ENAB1, NULL);
}

/*
 * _start packet gets sent twice at start, _done gets sent twice at end
 */
static void qib_autoneg_7322_send(struct qib_pportdata *ppd, int which)
{
        struct qib_devdata *dd = ppd->dd;
        static u32 swapped;
        u32 dw, i, hcnt, dcnt, *data;
        static u32 hdr[7] = { 0xf002ffff, 0x48ffff, 0x6400abba };
        static u32 madpayload_start[0x40] = {
                0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
                0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
                0x1, 0x1388, 0x15e, 0x1, /* rest 0's */
                };
        static u32 madpayload_done[0x40] = {
                0x1810103, 0x1, 0x0, 0x0, 0x2c90000, 0x2c9, 0x0, 0x0,
                0xffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
                0x40000001, 0x1388, 0x15e, /* rest 0's */
                };

        dcnt = ARRAY_SIZE(madpayload_start);
        hcnt = ARRAY_SIZE(hdr);
        if (!swapped) {
                /* for maintainability, do it at runtime */
                for (i = 0; i < hcnt; i++) {
                        dw = (__force u32) cpu_to_be32(hdr[i]);
                        hdr[i] = dw;
                }
                for (i = 0; i < dcnt; i++) {
                        dw = (__force u32) cpu_to_be32(madpayload_start[i]);
                        madpayload_start[i] = dw;
                        dw = (__force u32) cpu_to_be32(madpayload_done[i]);
                        madpayload_done[i] = dw;
                }
                swapped = 1;
        }

        data = which ? madpayload_done : madpayload_start;

        autoneg_7322_sendpkt(ppd, hdr, dcnt, data);
        qib_read_kreg64(dd, kr_scratch);
        udelay(2);
        autoneg_7322_sendpkt(ppd, hdr, dcnt, data);
        qib_read_kreg64(dd, kr_scratch);
        udelay(2);
}

/*
 * Do the absolute minimum to cause an IB speed change, and make it
 * ready, but don't actually trigger the change.   The caller will
 * do that when ready (if link is in Polling training state, it will
 * happen immediately, otherwise when link next goes down)
 *
 * This routine should only be used as part of the DDR autonegotation
 * code for devices that are not compliant with IB 1.2 (or code that
 * fixes things up for same).
 *
 * When link has gone down, and autoneg enabled, or autoneg has
 * failed and we give up until next time we set both speeds, and
 * then we want IBTA enabled as well as "use max enabled speed.
 */
static void set_7322_ibspeed_fast(struct qib_pportdata *ppd, u32 speed)
{
        u64 newctrlb;
        newctrlb = ppd->cpspec->ibcctrl_b & ~(IBA7322_IBC_SPEED_MASK |
                                    IBA7322_IBC_IBTA_1_2_MASK |
                                    IBA7322_IBC_MAX_SPEED_MASK);

        if (speed & (speed - 1)) /* multiple speeds */
                newctrlb |= (speed << IBA7322_IBC_SPEED_LSB) |
                                    IBA7322_IBC_IBTA_1_2_MASK |
                                    IBA7322_IBC_MAX_SPEED_MASK;
        else
                newctrlb |= speed == QIB_IB_QDR ?
                        IBA7322_IBC_SPEED_QDR | IBA7322_IBC_IBTA_1_2_MASK :
                        ((speed == QIB_IB_DDR ?
                          IBA7322_IBC_SPEED_DDR : IBA7322_IBC_SPEED_SDR));

        if (newctrlb == ppd->cpspec->ibcctrl_b)
                return;

        ppd->cpspec->ibcctrl_b = newctrlb;
        qib_write_kreg_port(ppd, krp_ibcctrl_b, ppd->cpspec->ibcctrl_b);
        qib_write_kreg(ppd->dd, kr_scratch, 0);
}

/*
 * This routine is only used when we are not talking to another
 * IB 1.2-compliant device that we think can do DDR.
 * (This includes all existing switch chips as of Oct 2007.)
 * 1.2-compliant devices go directly to DDR prior to reaching INIT
 */
static void try_7322_autoneg(struct qib_pportdata *ppd)
{
        unsigned long flags;

        spin_lock_irqsave(&ppd->lflags_lock, flags);
        ppd->lflags |= QIBL_IB_AUTONEG_INPROG;
        spin_unlock_irqrestore(&ppd->lflags_lock, flags);
        qib_autoneg_7322_send(ppd, 0);
        set_7322_ibspeed_fast(ppd, QIB_IB_DDR);
        qib_7322_mini_pcs_reset(ppd);
        /* 2 msec is minimum length of a poll cycle */
        queue_delayed_work(ib_wq, &ppd->cpspec->autoneg_work,
                           msecs_to_jiffies(2));
}

/*
 * Handle the empirically determined mechanism for auto-negotiation
 * of DDR speed with switches.
 */
static void autoneg_7322_work(struct work_struct *work)
{
        struct qib_pportdata *ppd;
        struct qib_devdata *dd;
        u64 startms;
        u32 i;
        unsigned long flags;

        ppd = container_of(work, struct qib_chippport_specific,
                            autoneg_work.work)->ppd;
        dd = ppd->dd;

        startms = jiffies_to_msecs(jiffies);

        /*
         * Busy wait for this first part, it should be at most a
         * few hundred usec, since we scheduled ourselves for 2msec.
         */
        for (i = 0; i < 25; i++) {
                if (SYM_FIELD(ppd->lastibcstat, IBCStatusA_0, LinkState)
                     == IB_7322_LT_STATE_POLLQUIET) {
                        qib_set_linkstate(ppd, QIB_IB_LINKDOWN_DISABLE);
                        break;
                }
                udelay(100);
        }

        if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG))
                goto done; /* we got there early or told to stop */

        /* we expect this to timeout */
        if (wait_event_timeout(ppd->cpspec->autoneg_wait,
                               !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
                               msecs_to_jiffies(90)))
                goto done;
        qib_7322_mini_pcs_reset(ppd);

        /* we expect this to timeout */
        if (wait_event_timeout(ppd->cpspec->autoneg_wait,
                               !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
                               msecs_to_jiffies(1700)))
                goto done;
        qib_7322_mini_pcs_reset(ppd);

        set_7322_ibspeed_fast(ppd, QIB_IB_SDR);

        /*
         * Wait up to 250 msec for link to train and get to INIT at DDR;
         * this should terminate early.
         */
        wait_event_timeout(ppd->cpspec->autoneg_wait,
                !(ppd->lflags & QIBL_IB_AUTONEG_INPROG),
                msecs_to_jiffies(250));
done:
        if (ppd->lflags & QIBL_IB_AUTONEG_INPROG) {
                spin_lock_irqsave(&ppd->lflags_lock, flags);
                ppd->lflags &= ~QIBL_IB_AUTONEG_INPROG;
                if (ppd->cpspec->autoneg_tries == AUTONEG_TRIES) {
                        ppd->lflags |= QIBL_IB_AUTONEG_FAILED;
                        ppd->cpspec->autoneg_tries = 0;
                }
                spin_unlock_irqrestore(&ppd->lflags_lock, flags);
                set_7322_ibspeed_fast(ppd, ppd->link_speed_enabled);
        }
}

/*
 * This routine is used to request IPG set in the QLogic switch.
 * Only called if r1.
 */
static void try_7322_ipg(struct qib_pportdata *ppd)
{
        struct qib_ibport *ibp = &ppd->ibport_data;
        struct ib_mad_send_buf *send_buf;
        struct ib_mad_agent *agent;
        struct ib_smp *smp;
        unsigned delay;
        int ret;

        agent = ibp->send_agent;
        if (!agent)
                goto retry;

        send_buf = ib_create_send_mad(agent, 0, 0, 0, IB_MGMT_MAD_HDR,
                                      IB_MGMT_MAD_DATA, GFP_ATOMIC);
        if (IS_ERR(send_buf))
                goto retry;

        if (!ibp->smi_ah) {
                struct ib_ah_attr attr;
                struct ib_ah *ah;

                memset(&attr, 0, sizeof attr);
                attr.dlid = be16_to_cpu(IB_LID_PERMISSIVE);
                attr.port_num = ppd->port;
                ah = ib_create_ah(ibp->qp0->ibqp.pd, &attr);
                if (IS_ERR(ah))
                        ret = -EINVAL;
                else {
                        send_buf->ah = ah;
                        ibp->smi_ah = to_iah(ah);
                        ret = 0;
                }
        } else {
                send_buf->ah = &ibp->smi_ah->ibah;
                ret = 0;
        }

        smp = send_buf->mad;
        smp->base_version = IB_MGMT_BASE_VERSION;
        smp->mgmt_class = IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE;
        smp->class_version = 1;
        smp->method = IB_MGMT_METHOD_SEND;
        smp->hop_cnt = 1;
        smp->attr_id = QIB_VENDOR_IPG;
        smp->attr_mod = 0;

        if (!ret)
                ret = ib_post_send_mad(send_buf, NULL);
        if (ret)
                ib_free_send_mad(send_buf);
retry:
        delay = 2 << ppd->cpspec->ipg_tries;
        queue_delayed_work(ib_wq, &ppd->cpspec->ipg_work,
                           msecs_to_jiffies(delay));
}

/*
 * Timeout handler for setting IPG.
 * Only called if r1.
 */
static void ipg_7322_work(struct work_struct *work)
{
        struct qib_pportdata *ppd;

        ppd = container_of(work, struct qib_chippport_specific,
                           ipg_work.work)->ppd;
        if ((ppd->lflags & (QIBL_LINKINIT | QIBL_LINKARMED | QIBL_LINKACTIVE))
            && ++ppd->cpspec->ipg_tries <= 10)
                try_7322_ipg(ppd);
}

static u32 qib_7322_iblink_state(u64 ibcs)
{
        u32 state = (u32)SYM_FIELD(ibcs, IBCStatusA_0, LinkState);

        switch (state) {
        case IB_7322_L_STATE_INIT:
                state = IB_PORT_INIT;
                break;
        case IB_7322_L_STATE_ARM:
                state = IB_PORT_ARMED;
                break;
        case IB_7322_L_STATE_ACTIVE:
                /* fall through */
        case IB_7322_L_STATE_ACT_DEFER:
                state = IB_PORT_ACTIVE;
                break;
        default: /* fall through */
        case IB_7322_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_7322_phys_portstate(u64 ibcs)
{
        u8 state = (u8)SYM_FIELD(ibcs, IBCStatusA_0, LinkTrainingState);
        return qib_7322_physportstate[state];
}

static int qib_7322_ib_updown(struct qib_pportdata *ppd, int ibup, u64 ibcs)
{
        int ret = 0, symadj = 0;
        unsigned long flags;
        int mult;

        spin_lock_irqsave(&ppd->lflags_lock, flags);
        ppd->lflags &= ~QIBL_IB_FORCE_NOTIFY;
        spin_unlock_irqrestore(&ppd->lflags_lock, flags);

        /* Update our picture of width and speed from chip */
        if (ibcs & SYM_MASK(IBCStatusA_0, LinkSpeedQDR)) {
                ppd->link_speed_active = QIB_IB_QDR;
                mult = 4;
        } else if (ibcs & SYM_MASK(IBCStatusA_0, LinkSpeedActive)) {
                ppd->link_speed_active = QIB_IB_DDR;
                mult = 2;
        } else {
                ppd->link_speed_active = QIB_IB_SDR;
                mult = 1;
        }
        if (ibcs & SYM_MASK(IBCStatusA_0, LinkWidthActive)) {
                ppd->link_width_active = IB_WIDTH_4X;
                mult *= 4;
        } else
                ppd->link_width_active = IB_WIDTH_1X;
        ppd->delay_mult = ib_rate_to_delay[mult_to_ib_rate(mult)];

        if (!ibup) {
                u64 clr;

                /* Link went down. */
                /* do IPG MAD again after linkdown, even if last time failed */
                ppd->cpspec->ipg_tries = 0;
                clr = qib_read_kreg_port(ppd, krp_ibcstatus_b) &
                        (SYM_MASK(IBCStatusB_0, heartbeat_timed_out) |
                         SYM_MASK(IBCStatusB_0, heartbeat_crosstalk));
                if (clr)
                        qib_write_kreg_port(ppd, krp_ibcstatus_b, clr);
                if (!(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
                                     QIBL_IB_AUTONEG_INPROG)))
                        set_7322_ibspeed_fast(ppd, ppd->link_speed_enabled);
                if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
                        /* unlock the Tx settings, speed may change */
                        qib_write_kreg_port(ppd, krp_tx_deemph_override,
                                SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                                reset_tx_deemphasis_override));
                        qib_cancel_sends(ppd);
                        /* on link down, ensure sane pcs state */
                        qib_7322_mini_pcs_reset(ppd);
                        spin_lock_irqsave(&ppd->sdma_lock, flags);
                        if (__qib_sdma_running(ppd))
                                __qib_sdma_process_event(ppd,
                                        qib_sdma_event_e70_go_idle);
                        spin_unlock_irqrestore(&ppd->sdma_lock, flags);
                }
                clr = read_7322_creg32_port(ppd, crp_iblinkdown);
                if (clr == ppd->cpspec->iblnkdownsnap)
                        ppd->cpspec->iblnkdowndelta++;
        } else {
                if (qib_compat_ddr_negotiate &&
                    !(ppd->lflags & (QIBL_IB_AUTONEG_FAILED |
                                     QIBL_IB_AUTONEG_INPROG)) &&
                    ppd->link_speed_active == QIB_IB_SDR &&
                    (ppd->link_speed_enabled & QIB_IB_DDR)
                    && ppd->cpspec->autoneg_tries < AUTONEG_TRIES) {
                        /* we are SDR, and auto-negotiation enabled */
                        ++ppd->cpspec->autoneg_tries;
                        if (!ppd->cpspec->ibdeltainprog) {
                                ppd->cpspec->ibdeltainprog = 1;
                                ppd->cpspec->ibsymdelta +=
                                        read_7322_creg32_port(ppd,
                                                crp_ibsymbolerr) -
                                                ppd->cpspec->ibsymsnap;
                                ppd->cpspec->iblnkerrdelta +=
                                        read_7322_creg32_port(ppd,
                                                crp_iblinkerrrecov) -
                                                ppd->cpspec->iblnkerrsnap;
                        }
                        try_7322_autoneg(ppd);
                        ret = 1; /* no other IB status change processing */
                } else if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
                           ppd->link_speed_active == QIB_IB_SDR) {
                        qib_autoneg_7322_send(ppd, 1);
                        set_7322_ibspeed_fast(ppd, QIB_IB_DDR);
                        qib_7322_mini_pcs_reset(ppd);
                        udelay(2);
                        ret = 1; /* no other IB status change processing */
                } else if ((ppd->lflags & QIBL_IB_AUTONEG_INPROG) &&
                           (ppd->link_speed_active & QIB_IB_DDR)) {
                        spin_lock_irqsave(&ppd->lflags_lock, flags);
                        ppd->lflags &= ~(QIBL_IB_AUTONEG_INPROG |
                                         QIBL_IB_AUTONEG_FAILED);
                        spin_unlock_irqrestore(&ppd->lflags_lock, flags);
                        ppd->cpspec->autoneg_tries = 0;
                        /* re-enable SDR, for next link down */
                        set_7322_ibspeed_fast(ppd, ppd->link_speed_enabled);
                        wake_up(&ppd->cpspec->autoneg_wait);
                        symadj = 1;
                } else if (ppd->lflags & QIBL_IB_AUTONEG_FAILED) {
                        /*
                         * Clear autoneg failure flag, and do setup
                         * so we'll try next time link goes down and
                         * back to INIT (possibly connected to a
                         * different device).
                         */
                        spin_lock_irqsave(&ppd->lflags_lock, flags);
                        ppd->lflags &= ~QIBL_IB_AUTONEG_FAILED;
                        spin_unlock_irqrestore(&ppd->lflags_lock, flags);
                        ppd->cpspec->ibcctrl_b |= IBA7322_IBC_IBTA_1_2_MASK;
                        symadj = 1;
                }
                if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
                        symadj = 1;
                        if (ppd->dd->cspec->r1 && ppd->cpspec->ipg_tries <= 10)
                                try_7322_ipg(ppd);
                        if (!ppd->cpspec->recovery_init)
                                setup_7322_link_recovery(ppd, 0);
                        ppd->cpspec->qdr_dfe_time = jiffies +
                                msecs_to_jiffies(QDR_DFE_DISABLE_DELAY);
                }
                ppd->cpspec->ibmalfusesnap = 0;
                ppd->cpspec->ibmalfsnap = read_7322_creg32_port(ppd,
                        crp_errlink);
        }
        if (symadj) {
                ppd->cpspec->iblnkdownsnap =
                        read_7322_creg32_port(ppd, crp_iblinkdown);
                if (ppd->cpspec->ibdeltainprog) {
                        ppd->cpspec->ibdeltainprog = 0;
                        ppd->cpspec->ibsymdelta += read_7322_creg32_port(ppd,
                                crp_ibsymbolerr) - ppd->cpspec->ibsymsnap;
                        ppd->cpspec->iblnkerrdelta += read_7322_creg32_port(ppd,
                                crp_iblinkerrrecov) - ppd->cpspec->iblnkerrsnap;
                }
        } else if (!ibup && qib_compat_ddr_negotiate &&
                   !ppd->cpspec->ibdeltainprog &&
                        !(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
                ppd->cpspec->ibdeltainprog = 1;
                ppd->cpspec->ibsymsnap = read_7322_creg32_port(ppd,
                        crp_ibsymbolerr);
                ppd->cpspec->iblnkerrsnap = read_7322_creg32_port(ppd,
                        crp_iblinkerrrecov);
        }

        if (!ret)
                qib_setup_7322_setextled(ppd, ibup);
        return ret;
}

/*
 * Does read/modify/write to appropriate registers to
 * set output and direction bits selected by mask.
 * these are in their canonical postions (e.g. lsb of
 * dir will end up in D48 of extctrl on existing chips).
 * returns contents of GP Inputs.
 */
static int gpio_7322_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);
}

/* Enable writes to config EEPROM, if possible. Returns previous state */
static int qib_7322_eeprom_wen(struct qib_devdata *dd, int wen)
{
        int prev_wen;
        u32 mask;

        mask = 1 << QIB_EEPROM_WEN_NUM;
        prev_wen = ~gpio_7322_mod(dd, 0, 0, 0) >> QIB_EEPROM_WEN_NUM;
        gpio_7322_mod(dd, wen ? 0 : mask, mask, mask);

        return prev_wen & 1;
}

/*
 * 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_7322_chip_params(struct qib_devdata *dd)
{
        u64 val;
        u32 piobufs;
        int mtu;

        dd->palign = qib_read_kreg32(dd, kr_pagealign);

        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->piobufbase = qib_read_kreg64(dd, kr_sendpiobufbase);
        dd->pio2k_bufbase = dd->piobufbase & 0xffffffff;

        val = qib_read_kreg64(dd, kr_sendpiobufcnt);
        dd->piobcnt2k = val & ~0U;
        dd->piobcnt4k = val >> 32;
        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[0].ibmtu = (u32)mtu;
        dd->pport[1].ibmtu = (u32)mtu;

        /* these may be adjusted in init_chip_wc_pat() */
        dd->pio2kbase = (u32 __iomem *)
                ((char __iomem *) dd->kregbase + dd->pio2k_bufbase);
        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 + NUM_VL15_BUFS;

        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_7322_chip_params(), so split out as separate function
 */
static void qib_7322_set_baseaddrs(struct qib_devdata *dd)
{
        u32 cregbase;
        cregbase = qib_read_kreg32(dd, kr_counterregbase);

        dd->cspec->cregbase = (u64 __iomem *)(cregbase +
                (char __iomem *)dd->kregbase);

        dd->egrtidbase = (u64 __iomem *)
                ((char __iomem *) dd->kregbase + dd->rcvegrbase);

        /* port registers are defined as relative to base of chip */
        dd->pport[0].cpspec->kpregbase =
                (u64 __iomem *)((char __iomem *)dd->kregbase);
        dd->pport[1].cpspec->kpregbase =
                (u64 __iomem *)(dd->palign +
                (char __iomem *)dd->kregbase);
        dd->pport[0].cpspec->cpregbase =
                (u64 __iomem *)(qib_read_kreg_port(&dd->pport[0],
                kr_counterregbase) + (char __iomem *)dd->kregbase);
        dd->pport[1].cpspec->cpregbase =
                (u64 __iomem *)(qib_read_kreg_port(&dd->pport[1],
                kr_counterregbase) + (char __iomem *)dd->kregbase);
}

/*
 * This is a fairly special-purpose observer, so we only support
 * the port-specific parts of SendCtrl
 */

#define SENDCTRL_SHADOWED (SYM_MASK(SendCtrl_0, SendEnable) |           \
                           SYM_MASK(SendCtrl_0, SDmaEnable) |           \
                           SYM_MASK(SendCtrl_0, SDmaIntEnable) |        \
                           SYM_MASK(SendCtrl_0, SDmaSingleDescriptor) | \
                           SYM_MASK(SendCtrl_0, SDmaHalt) |             \
                           SYM_MASK(SendCtrl_0, IBVLArbiterEn) |        \
                           SYM_MASK(SendCtrl_0, ForceCreditUpToDate))

static int sendctrl_hook(struct qib_devdata *dd,
                         const struct diag_observer *op, u32 offs,
                         u64 *data, u64 mask, int only_32)
{
        unsigned long flags;
        unsigned idx;
        unsigned pidx;
        struct qib_pportdata *ppd = NULL;
        u64 local_data, all_bits;

        /*
         * The fixed correspondence between Physical ports and pports is
         * severed. We need to hunt for the ppd that corresponds
         * to the offset we got. And we have to do that without admitting
         * we know the stride, apparently.
         */
        for (pidx = 0; pidx < dd->num_pports; ++pidx) {
                u64 __iomem *psptr;
                u32 psoffs;

                ppd = dd->pport + pidx;
                if (!ppd->cpspec->kpregbase)
                        continue;

                psptr = ppd->cpspec->kpregbase + krp_sendctrl;
                psoffs = (u32) (psptr - dd->kregbase) * sizeof(*psptr);
                if (psoffs == offs)
                        break;
        }

        /* If pport is not being managed by driver, just avoid shadows. */
        if (pidx >= dd->num_pports)
                ppd = NULL;

        /* In any case, "idx" is flat index in kreg space */
        idx = offs / sizeof(u64);

        all_bits = ~0ULL;
        if (only_32)
                all_bits >>= 32;

        spin_lock_irqsave(&dd->sendctrl_lock, flags);
        if (!ppd || (mask & all_bits) != all_bits) {
                /*
                 * At least some mask bits are zero, so we need
                 * to read. The judgement call is whether from
                 * reg or shadow. First-cut: read reg, and complain
                 * if any bits which should be shadowed are different
                 * from their shadowed value.
                 */
                if (only_32)
                        local_data = (u64)qib_read_kreg32(dd, idx);
                else
                        local_data = qib_read_kreg64(dd, idx);
                *data = (local_data & ~mask) | (*data & mask);
        }
        if (mask) {
                /*
                 * At least some mask bits are one, so we need
                 * to write, but only shadow some bits.
                 */
                u64 sval, tval; /* Shadowed, transient */

                /*
                 * New shadow val is bits we don't want to touch,
                 * ORed with bits we do, that are intended for shadow.
                 */
                if (ppd) {
                        sval = ppd->p_sendctrl & ~mask;
                        sval |= *data & SENDCTRL_SHADOWED & mask;
                        ppd->p_sendctrl = sval;
                } else
                        sval = *data & SENDCTRL_SHADOWED & mask;
                tval = sval | (*data & ~SENDCTRL_SHADOWED & mask);
                qib_write_kreg(dd, idx, tval);
                qib_write_kreg(dd, kr_scratch, 0Ull);
        }
        spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
        return only_32 ? 4 : 8;
}

static const struct diag_observer sendctrl_0_observer = {
        sendctrl_hook, KREG_IDX(SendCtrl_0) * sizeof(u64),
        KREG_IDX(SendCtrl_0) * sizeof(u64)
};

static const struct diag_observer sendctrl_1_observer = {
        sendctrl_hook, KREG_IDX(SendCtrl_1) * sizeof(u64),
        KREG_IDX(SendCtrl_1) * sizeof(u64)
};

static ushort sdma_fetch_prio = 8;
module_param_named(sdma_fetch_prio, sdma_fetch_prio, ushort, S_IRUGO);
MODULE_PARM_DESC(sdma_fetch_prio, "SDMA descriptor fetch priority");

/* Besides logging QSFP events, we set appropriate TxDDS values */
static void init_txdds_table(struct qib_pportdata *ppd, int override);

static void qsfp_7322_event(struct work_struct *work)
{
        struct qib_qsfp_data *qd;
        struct qib_pportdata *ppd;
        u64 pwrup;
        int ret;
        u32 le2;

        qd = container_of(work, struct qib_qsfp_data, work);
        ppd = qd->ppd;
        pwrup = qd->t_insert + msecs_to_jiffies(QSFP_PWR_LAG_MSEC);

        /*
         * Some QSFP's not only do not respond until the full power-up
         * time, but may behave badly if we try. So hold off responding
         * to insertion.
         */
        while (1) {
                u64 now = get_jiffies_64();
                if (time_after64(now, pwrup))
                        break;
                msleep(20);
        }
        ret = qib_refresh_qsfp_cache(ppd, &qd->cache);
        /*
         * Need to change LE2 back to defaults if we couldn't
         * read the cable type (to handle cable swaps), so do this
         * even on failure to read cable information.  We don't
         * get here for QME, so IS_QME check not needed here.
         */
        if (!ret && !ppd->dd->cspec->r1) {
                if (QSFP_IS_ACTIVE_FAR(qd->cache.tech))
                        le2 = LE2_QME;
                else if (qd->cache.atten[1] >= qib_long_atten &&
                         QSFP_IS_CU(qd->cache.tech))
                        le2 = LE2_5m;
                else
                        le2 = LE2_DEFAULT;
        } else
                le2 = LE2_DEFAULT;
        ibsd_wr_allchans(ppd, 13, (le2 << 7), BMASK(9, 7));
        init_txdds_table(ppd, 0);
}

/*
 * There is little we can do but complain to the user if QSFP
 * initialization fails.
 */
static void qib_init_7322_qsfp(struct qib_pportdata *ppd)
{
        unsigned long flags;
        struct qib_qsfp_data *qd = &ppd->cpspec->qsfp_data;
        struct qib_devdata *dd = ppd->dd;
        u64 mod_prs_bit = QSFP_GPIO_MOD_PRS_N;

        mod_prs_bit <<= (QSFP_GPIO_PORT2_SHIFT * ppd->hw_pidx);
        qd->ppd = ppd;
        qib_qsfp_init(qd, qsfp_7322_event);
        spin_lock_irqsave(&dd->cspec->gpio_lock, flags);
        dd->cspec->extctrl |= (mod_prs_bit << SYM_LSB(EXTCtrl, GPIOInvert));
        dd->cspec->gpio_mask |= mod_prs_bit;
        qib_write_kreg(dd, kr_extctrl, dd->cspec->extctrl);
        qib_write_kreg(dd, kr_gpio_mask, dd->cspec->gpio_mask);
        spin_unlock_irqrestore(&dd->cspec->gpio_lock, flags);
}

/*
 * called at device initialization time, and also if the txselect
 * module parameter is changed.  This is used for cables that don't
 * have valid QSFP EEPROMs (not present, or attenuation is zero).
 * We initialize to the default, then if there is a specific
 * unit,port match, we use that (and set it immediately, for the
 * current speed, if the link is at INIT or better).
 * String format is "default# unit#,port#=# ... u,p=#", separators must
 * be a SPACE character.  A newline terminates.  The u,p=# tuples may
 * optionally have "u,p=#,#", where the final # is the H1 value
 * The last specific match is used (actually, all are used, but last
 * one is the one that winds up set); if none at all, fall back on default.
 */
static void set_no_qsfp_atten(struct qib_devdata *dd, int change)
{
        char *nxt, *str;
        u32 pidx, unit, port, deflt, h1;
        unsigned long val;
        int any = 0, seth1;
        int txdds_size;

        str = txselect_list;

        /* default number is validated in setup_txselect() */
        deflt = simple_strtoul(str, &nxt, 0);
        for (pidx = 0; pidx < dd->num_pports; ++pidx)
                dd->pport[pidx].cpspec->no_eep = deflt;

        txdds_size = TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ;
        if (IS_QME(dd) || IS_QMH(dd))
                txdds_size += TXDDS_MFG_SZ;

        while (*nxt && nxt[1]) {
                str = ++nxt;
                unit = simple_strtoul(str, &nxt, 0);
                if (nxt == str || !*nxt || *nxt != ',') {
                        while (*nxt && *nxt++ != ' ') /* skip to next, if any */
                                ;
                        continue;
                }
                str = ++nxt;
                port = simple_strtoul(str, &nxt, 0);
                if (nxt == str || *nxt != '=') {
                        while (*nxt && *nxt++ != ' ') /* skip to next, if any */
                                ;
                        continue;
                }
                str = ++nxt;
                val = simple_strtoul(str, &nxt, 0);
                if (nxt == str) {
                        while (*nxt && *nxt++ != ' ') /* skip to next, if any */
                                ;
                        continue;
                }
                if (val >= txdds_size)
                        continue;
                seth1 = 0;
                h1 = 0; /* gcc thinks it might be used uninitted */
                if (*nxt == ',' && nxt[1]) {
                        str = ++nxt;
                        h1 = (u32)simple_strtoul(str, &nxt, 0);
                        if (nxt == str)
                                while (*nxt && *nxt++ != ' ') /* skip */
                                        ;
                        else
                                seth1 = 1;
                }
                for (pidx = 0; dd->unit == unit && pidx < dd->num_pports;
                     ++pidx) {
                        struct qib_pportdata *ppd = &dd->pport[pidx];

                        if (ppd->port != port || !ppd->link_speed_supported)
                                continue;
                        ppd->cpspec->no_eep = val;
                        if (seth1)
                                ppd->cpspec->h1_val = h1;
                        /* now change the IBC and serdes, overriding generic */
                        init_txdds_table(ppd, 1);
                        /* Re-enable the physical state machine on mezz boards
                         * now that the correct settings have been set. */
                        if (IS_QMH(dd) || IS_QME(dd))
                                qib_set_ib_7322_lstate(ppd, 0,
                                            QLOGIC_IB_IBCC_LINKINITCMD_SLEEP);
                        any++;
                }
                if (*nxt == '\n')
                        break; /* done */
        }
        if (change && !any) {
                /* no specific setting, use the default.
                 * Change the IBC and serdes, but since it's
                 * general, don't override specific settings.
                 */
                for (pidx = 0; pidx < dd->num_pports; ++pidx)
                        if (dd->pport[pidx].link_speed_supported)
                                init_txdds_table(&dd->pport[pidx], 0);
        }
}

/* handle the txselect parameter changing */
static int setup_txselect(const char *str, struct kernel_param *kp)
{
        struct qib_devdata *dd;
        unsigned long val;
        char *n;
        if (strlen(str) >= MAX_ATTEN_LEN) {
                printk(KERN_INFO QIB_DRV_NAME " txselect_values string "
                       "too long\n");
                return -ENOSPC;
        }
        val = simple_strtoul(str, &n, 0);
        if (n == str || val >= (TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ +
                                TXDDS_MFG_SZ)) {
                printk(KERN_INFO QIB_DRV_NAME
                       "txselect_values must start with a number < %d\n",
                        TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ + TXDDS_MFG_SZ);
                return -EINVAL;
        }
        strcpy(txselect_list, str);

        list_for_each_entry(dd, &qib_dev_list, list)
                if (dd->deviceid == PCI_DEVICE_ID_QLOGIC_IB_7322)
                        set_no_qsfp_atten(dd, 1);
        return 0;
}

/*
 * 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_7322_initreg(struct qib_devdata *dd)
{
        int ret = 0, n;
        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;
        }

        n = dd->piobcnt2k + dd->piobcnt4k + NUM_VL15_BUFS;
        qib_7322_txchk_change(dd, 0, n, TXCHK_CHG_TYPE_KERN, NULL);
        /* driver sends get pkey, lid, etc. checking also, to catch bugs */
        qib_7322_txchk_change(dd, 0, n, TXCHK_CHG_TYPE_ENAB1, NULL);

        qib_register_observer(dd, &sendctrl_0_observer);
        qib_register_observer(dd, &sendctrl_1_observer);

        dd->control &= ~QLOGIC_IB_C_SDMAFETCHPRIOEN;
        qib_write_kreg(dd, kr_control, dd->control);
        /*
         * Set SendDmaFetchPriority and init Tx params, including
         * QSFP handler on boards that have QSFP.
         * First set our default attenuation entry for cables that
         * don't have valid attenuation.
         */
        set_no_qsfp_atten(dd, 0);
        for (n = 0; n < dd->num_pports; ++n) {
                struct qib_pportdata *ppd = dd->pport + n;

                qib_write_kreg_port(ppd, krp_senddmaprioritythld,
                                    sdma_fetch_prio & 0xf);
                /* Initialize qsfp if present on board. */
                if (dd->flags & QIB_HAS_QSFP)
                        qib_init_7322_qsfp(ppd);
        }
        dd->control |= QLOGIC_IB_C_SDMAFETCHPRIOEN;
        qib_write_kreg(dd, kr_control, dd->control);

        return ret;
}

/* per IB port errors.  */
#define SENDCTRL_PIBP (MASK_ACROSS(0, 1) | MASK_ACROSS(3, 3) | \
        MASK_ACROSS(8, 15))
#define RCVCTRL_PIBP (MASK_ACROSS(0, 17) | MASK_ACROSS(39, 41))
#define ERRS_PIBP (MASK_ACROSS(57, 58) | MASK_ACROSS(54, 54) | \
        MASK_ACROSS(36, 49) | MASK_ACROSS(29, 34) | MASK_ACROSS(14, 17) | \
        MASK_ACROSS(0, 11))

/*
 * Write the initialization per-port registers that need to be done at
 * driver load and after reset completes (i.e., that aren't done as part
 * of other init procedures called from qib_init.c).
 * Some of these should be redundant on reset, but play safe.
 */
static void write_7322_init_portregs(struct qib_pportdata *ppd)
{
        u64 val;
        int i;

        if (!ppd->link_speed_supported) {
                /* no buffer credits for this port */
                for (i = 1; i < 8; i++)
                        qib_write_kreg_port(ppd, krp_rxcreditvl0 + i, 0);
                qib_write_kreg_port(ppd, krp_ibcctrl_b, 0);
                qib_write_kreg(ppd->dd, kr_scratch, 0);
                return;
        }

        /*
         * Set the number of supported virtual lanes in IBC,
         * for flow control packet handling on unsupported VLs
         */
        val = qib_read_kreg_port(ppd, krp_ibsdtestiftx);
        val &= ~SYM_MASK(IB_SDTEST_IF_TX_0, VL_CAP);
        val |= (u64)(ppd->vls_supported - 1) <<
                SYM_LSB(IB_SDTEST_IF_TX_0, VL_CAP);
        qib_write_kreg_port(ppd, krp_ibsdtestiftx, val);

        qib_write_kreg_port(ppd, krp_rcvbthqp, QIB_KD_QP);

        /* enable tx header checking */
        qib_write_kreg_port(ppd, krp_sendcheckcontrol, IBA7322_SENDCHK_PKEY |
                            IBA7322_SENDCHK_BTHQP | IBA7322_SENDCHK_SLID |
                            IBA7322_SENDCHK_RAW_IPV6 | IBA7322_SENDCHK_MINSZ);

        qib_write_kreg_port(ppd, krp_ncmodectrl,
                SYM_MASK(IBNCModeCtrl_0, ScrambleCapLocal));

        /*
         * Unconditionally clear the bufmask bits.  If SDMA is
         * enabled, we'll set them appropriately later.
         */
        qib_write_kreg_port(ppd, krp_senddmabufmask0, 0);
        qib_write_kreg_port(ppd, krp_senddmabufmask1, 0);
        qib_write_kreg_port(ppd, krp_senddmabufmask2, 0);
        if (ppd->dd->cspec->r1)
                ppd->p_sendctrl |= SYM_MASK(SendCtrl_0, ForceCreditUpToDate);
}

/*
 * Write the initialization per-device registers that need to be done at
 * driver load and after reset completes (i.e., that aren't done as part
 * of other init procedures called from qib_init.c).  Also write per-port
 * registers that are affected by overall device config, such as QP mapping
 * Some of these should be redundant on reset, but play safe.
 */
static void write_7322_initregs(struct qib_devdata *dd)
{
        struct qib_pportdata *ppd;
        int i, pidx;
        u64 val;

        /* Set Multicast QPs received by port 2 to map to context one. */
        qib_write_kreg(dd, KREG_IDX(RcvQPMulticastContext_1), 1);

        for (pidx = 0; pidx < dd->num_pports; ++pidx) {
                unsigned n, regno;
                unsigned long flags;

                if (dd->n_krcv_queues < 2 ||
                        !dd->pport[pidx].link_speed_supported)
                        continue;

                ppd = &dd->pport[pidx];

                /* be paranoid against later code motion, etc. */
                spin_lock_irqsave(&dd->cspec->rcvmod_lock, flags);
                ppd->p_rcvctrl |= SYM_MASK(RcvCtrl_0, RcvQPMapEnable);
                spin_unlock_irqrestore(&dd->cspec->rcvmod_lock, flags);

                /* Initialize QP to context mapping */
                regno = krp_rcvqpmaptable;
                val = 0;
                if (dd->num_pports > 1)
                        n = dd->first_user_ctxt / dd->num_pports;
                else
                        n = dd->first_user_ctxt - 1;
                for (i = 0; i < 32; ) {
                        unsigned ctxt;

                        if (dd->num_pports > 1)
                                ctxt = (i % n) * dd->num_pports + pidx;
                        else if (i % n)
                                ctxt = (i % n) + 1;
                        else
                                ctxt = ppd->hw_pidx;
                        val |= ctxt << (5 * (i % 6));
                        i++;
                        if (i % 6 == 0) {
                                qib_write_kreg_port(ppd, regno, val);
                                val = 0;
                                regno++;
                        }
                }
                qib_write_kreg_port(ppd, regno, val);
        }

        /*
         * Setup up interrupt mitigation for kernel contexts, but
         * not user contexts (user contexts use interrupts when
         * stalled waiting for any packet, so want those interrupts
         * right away).
         */
        for (i = 0; i < dd->first_user_ctxt; i++) {
                dd->cspec->rcvavail_timeout[i] = rcv_int_timeout;
                qib_write_kreg(dd, kr_rcvavailtimeout + i, rcv_int_timeout);
        }

        /*
         * Initialize  as (disabled) rcvflow tables.  Application code
         * will setup each flow as it uses the flow.
         * Doesn't clear any of the error bits that might be set.
         */
        val = TIDFLOW_ERRBITS; /* these are W1C */
        for (i = 0; i < dd->cfgctxts; i++) {
                int flow;
                for (flow = 0; flow < NUM_TIDFLOWS_CTXT; flow++)
                        qib_write_ureg(dd, ur_rcvflowtable+flow, val, i);
        }

        /*
         * dual cards init to dual port recovery, single port cards to
         * the one port.  Dual port cards may later adjust to 1 port,
         * and then back to dual port if both ports are connected
         * */
        if (dd->num_pports)
                setup_7322_link_recovery(dd->pport, dd->num_pports > 1);
}

static int qib_init_7322_variables(struct qib_devdata *dd)
{
        struct qib_pportdata *ppd;
        unsigned features, pidx, sbufcnt;
        int ret, mtu;
        u32 sbufs, updthresh;

        /* pport structs are contiguous, allocated after devdata */
        ppd = (struct qib_pportdata *)(dd + 1);
        dd->pport = ppd;
        ppd[0].dd = dd;
        ppd[1].dd = dd;

        dd->cspec = (struct qib_chip_specific *)(ppd + 2);

        ppd[0].cpspec = (struct qib_chippport_specific *)(dd->cspec + 1);
        ppd[1].cpspec = &ppd[0].cpspec[1];
        ppd[0].cpspec->ppd = &ppd[0]; /* for autoneg_7322_work() */
        ppd[1].cpspec->ppd = &ppd[1]; /* for autoneg_7322_work() */

        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);
        dd->cspec->r1 = dd->minrev == 1;

        get_7322_chip_params(dd);
        features = qib_7322_boardname(dd);

        /* now that piobcnt2k and 4k set, we can allocate these */
        sbufcnt = dd->piobcnt2k + dd->piobcnt4k +
                NUM_VL15_BUFS + BITS_PER_LONG - 1;
        sbufcnt /= BITS_PER_LONG;
        dd->cspec->sendchkenable = kmalloc(sbufcnt *
                sizeof(*dd->cspec->sendchkenable), GFP_KERNEL);
        dd->cspec->sendgrhchk = kmalloc(sbufcnt *
                sizeof(*dd->cspec->sendgrhchk), GFP_KERNEL);
        dd->cspec->sendibchk = kmalloc(sbufcnt *
                sizeof(*dd->cspec->sendibchk), GFP_KERNEL);
        if (!dd->cspec->sendchkenable || !dd->cspec->sendgrhchk ||
                !dd->cspec->sendibchk) {
                qib_dev_err(dd, "Failed allocation for hdrchk bitmaps\n");
                ret = -ENOMEM;
                goto bail;
        }

        ppd = dd->pport;

        /*
         * GPIO bits for TWSI data and clock,
         * used for serial EEPROM.
         */
        dd->gpio_sda_num = _QIB_GPIO_SDA_NUM;
        dd->gpio_scl_num = _QIB_GPIO_SCL_NUM;
        dd->twsi_eeprom_dev = QIB_TWSI_EEPROM_DEV;

        dd->flags |= QIB_HAS_INTX | QIB_HAS_LINK_LATENCY |
                QIB_NODMA_RTAIL | QIB_HAS_VLSUPP | QIB_HAS_HDRSUPP |
                QIB_HAS_THRESH_UPDATE |
                (sdma_idle_cnt ? QIB_HAS_SDMA_TIMEOUT : 0);
        dd->flags |= qib_special_trigger ?
                QIB_USE_SPCL_TRIG : QIB_HAS_SEND_DMA;

        /*
         * Setup initial values.  These may change when PAT is enabled, but
         * we need these to do initial chip register accesses.
         */
        qib_7322_set_baseaddrs(dd);

        mtu = ib_mtu_enum_to_int(qib_ibmtu);
        if (mtu == -1)
                mtu = QIB_DEFAULT_MTU;

        dd->cspec->int_enable_mask = QIB_I_BITSEXTANT;
        /* all hwerrors become interrupts, unless special purposed */
        dd->cspec->hwerrmask = ~0ULL;
        /*  link_recovery setup causes these errors, so ignore them,
         *  other than clearing them when they occur */
        dd->cspec->hwerrmask &=
                ~(SYM_MASK(HwErrMask, IBSerdesPClkNotDetectMask_0) |
                  SYM_MASK(HwErrMask, IBSerdesPClkNotDetectMask_1) |
                  HWE_MASK(LATriggered));

        for (pidx = 0; pidx < NUM_IB_PORTS; ++pidx) {
                struct qib_chippport_specific *cp = ppd->cpspec;
                ppd->link_speed_supported = features & PORT_SPD_CAP;
                features >>=  PORT_SPD_CAP_SHIFT;
                if (!ppd->link_speed_supported) {
                        /* single port mode (7340, or configured) */
                        dd->skip_kctxt_mask |= 1 << pidx;
                        if (pidx == 0) {
                                /* Make sure port is disabled. */
                                qib_write_kreg_port(ppd, krp_rcvctrl, 0);
                                qib_write_kreg_port(ppd, krp_ibcctrl_a, 0);
                                ppd[0] = ppd[1];
                                dd->cspec->hwerrmask &= ~(SYM_MASK(HwErrMask,
                                                  IBSerdesPClkNotDetectMask_0)
                                                  | SYM_MASK(HwErrMask,
                                                  SDmaMemReadErrMask_0));
                                dd->cspec->int_enable_mask &= ~(
                                     SYM_MASK(IntMask, SDmaCleanupDoneMask_0) |
                                     SYM_MASK(IntMask, SDmaIdleIntMask_0) |
                                     SYM_MASK(IntMask, SDmaProgressIntMask_0) |
                                     SYM_MASK(IntMask, SDmaIntMask_0) |
                                     SYM_MASK(IntMask, ErrIntMask_0) |
                                     SYM_MASK(IntMask, SendDoneIntMask_0));
                        } else {
                                /* Make sure port is disabled. */
                                qib_write_kreg_port(ppd, krp_rcvctrl, 0);
                                qib_write_kreg_port(ppd, krp_ibcctrl_a, 0);
                                dd->cspec->hwerrmask &= ~(SYM_MASK(HwErrMask,
                                                  IBSerdesPClkNotDetectMask_1)
                                                  | SYM_MASK(HwErrMask,
                                                  SDmaMemReadErrMask_1));
                                dd->cspec->int_enable_mask &= ~(
                                     SYM_MASK(IntMask, SDmaCleanupDoneMask_1) |
                                     SYM_MASK(IntMask, SDmaIdleIntMask_1) |
                                     SYM_MASK(IntMask, SDmaProgressIntMask_1) |
                                     SYM_MASK(IntMask, SDmaIntMask_1) |
                                     SYM_MASK(IntMask, ErrIntMask_1) |
                                     SYM_MASK(IntMask, SendDoneIntMask_1));
                        }
                        continue;
                }

                dd->num_pports++;
                qib_init_pportdata(ppd, dd, pidx, dd->num_pports);

                ppd->link_width_supported = IB_WIDTH_1X | IB_WIDTH_4X;
                ppd->link_width_enabled = IB_WIDTH_4X;
                ppd->link_speed_enabled = ppd->link_speed_supported;
                /*
                 * Set the initial values to reasonable default, will be set
                 * for real when link is up.
                 */
                ppd->link_width_active = IB_WIDTH_4X;
                ppd->link_speed_active = QIB_IB_SDR;
                ppd->delay_mult = ib_rate_to_delay[IB_RATE_10_GBPS];
                switch (qib_num_cfg_vls) {
                case 1:
                        ppd->vls_supported = IB_VL_VL0;
                        break;
                case 2:
                        ppd->vls_supported = IB_VL_VL0_1;
                        break;
                default:
                        qib_devinfo(dd->pcidev,
                                    "Invalid num_vls %u, using 4 VLs\n",
                                    qib_num_cfg_vls);
                        qib_num_cfg_vls = 4;
                        /* fall through */
                case 4:
                        ppd->vls_supported = IB_VL_VL0_3;
                        break;
                case 8:
                        if (mtu <= 2048)
                                ppd->vls_supported = IB_VL_VL0_7;
                        else {
                                qib_devinfo(dd->pcidev,
                                            "Invalid num_vls %u for MTU %d "
                                            ", using 4 VLs\n",
                                            qib_num_cfg_vls, mtu);
                                ppd->vls_supported = IB_VL_VL0_3;
                                qib_num_cfg_vls = 4;
                        }
                        break;
                }
                ppd->vls_operational = ppd->vls_supported;

                init_waitqueue_head(&cp->autoneg_wait);
                INIT_DELAYED_WORK(&cp->autoneg_work,
                                  autoneg_7322_work);
                if (ppd->dd->cspec->r1)
                        INIT_DELAYED_WORK(&cp->ipg_work, ipg_7322_work);

                /*
                 * For Mez and similar cards, no qsfp info, so do
                 * the "cable info" setup here.  Can be overridden
                 * in adapter-specific routines.
                 */
                if (!(dd->flags & QIB_HAS_QSFP)) {
                        if (!IS_QMH(dd) && !IS_QME(dd))
                                qib_devinfo(dd->pcidev, "IB%u:%u: "
                                            "Unknown mezzanine card type\n",
                                            dd->unit, ppd->port);
                        cp->h1_val = IS_QMH(dd) ? H1_FORCE_QMH : H1_FORCE_QME;
                        /*
                         * Choose center value as default tx serdes setting
                         * until changed through module parameter.
                         */
                        ppd->cpspec->no_eep = IS_QMH(dd) ?
                                TXDDS_TABLE_SZ + 2 : TXDDS_TABLE_SZ + 4;
                } else
                        cp->h1_val = H1_FORCE_VAL;

                /* Avoid writes to chip for mini_init */
                if (!qib_mini_init)
                        write_7322_init_portregs(ppd);

                init_timer(&cp->chase_timer);
                cp->chase_timer.function = reenable_chase;
                cp->chase_timer.data = (unsigned long)ppd;

                ppd++;
        }

        dd->rcvhdrentsize = qib_rcvhdrentsize ?
                qib_rcvhdrentsize : QIB_RCVHDR_ENTSIZE;
        dd->rcvhdrsize = qib_rcvhdrsize ?
                qib_rcvhdrsize : QIB_DFLT_RCVHDRSIZE;
        dd->rhf_offset = dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);

        /* we always allocate at least 2048 bytes for eager buffers */
        dd->rcvegrbufsize = max(mtu, 2048);

        qib_7322_tidtemplate(dd);

        /*
         * We can request a receive interrupt for 1 or
         * more packets from current offset.
         */
        dd->rhdrhead_intr_off =
                (u64) rcv_int_count << IBA7322_HDRHEAD_PKTINT_SHIFT;

        /* setup the stats timer; the add_timer is done at end of init */
        init_timer(&dd->stats_timer);
        dd->stats_timer.function = qib_get_7322_faststats;
        dd->stats_timer.data = (unsigned long) dd;

        dd->ureg_align = 0x10000;  /* 64KB alignment */

        dd->piosize2kmax_dwords = dd->piosize2k >> 2;

        qib_7322_config_ctxts(dd);
        qib_set_ctxtcnt(dd);

        if (qib_wc_pat) {
                resource_size_t vl15off;
                /*
                 * We do not set WC on the VL15 buffers to avoid
                 * a rare problem with unaligned writes from
                 * interrupt-flushed store buffers, so we need
                 * to map those separately here.  We can't solve
                 * this for the rarely used mtrr case.
                 */
                ret = init_chip_wc_pat(dd, 0);
                if (ret)
                        goto bail;

                /* vl15 buffers start just after the 4k buffers */
                vl15off = dd->physaddr + (dd->piobufbase >> 32) +
                        dd->piobcnt4k * dd->align4k;
                dd->piovl15base = ioremap_nocache(vl15off,
                                                  NUM_VL15_BUFS * dd->align4k);
                if (!dd->piovl15base)
                        goto bail;
        }
        qib_7322_set_baseaddrs(dd); /* set chip access pointers now */

        ret = 0;
        if (qib_mini_init)
                goto bail;
        if (!dd->num_pports) {
                qib_dev_err(dd, "No ports enabled, giving up initialization\n");
                goto bail; /* no error, so can still figure out why err */
        }

        write_7322_initregs(dd);
        ret = qib_create_ctxts(dd);
        init_7322_cntrnames(dd);

        updthresh = 8U; /* update threshold */

        /* use all of 4KB buffers for the kernel SDMA, zero if !SDMA.
         * reserve the update threshold amount for other kernel use, such
         * as sending SMI, MAD, and ACKs, or 3, whichever is greater,
         * unless we aren't enabling SDMA, in which case we want to use
         * all the 4k bufs for the kernel.
         * if this was less than the update threshold, we could wait
         * a long time for an update.  Coded this way because we
         * sometimes change the update threshold for various reasons,
         * and we want this to remain robust.
         */
        if (dd->flags & QIB_HAS_SEND_DMA) {
                dd->cspec->sdmabufcnt = dd->piobcnt4k;
                sbufs = updthresh > 3 ? updthresh : 3;
        } else {
                dd->cspec->sdmabufcnt = 0;
                sbufs = dd->piobcnt4k;
        }
        dd->cspec->lastbuf_for_pio = dd->piobcnt2k + dd->piobcnt4k -
                dd->cspec->sdmabufcnt;
        dd->lastctxt_piobuf = dd->cspec->lastbuf_for_pio - sbufs;
        dd->cspec->lastbuf_for_pio--; /* range is <= , not < */
        dd->pbufsctxt = (dd->cfgctxts > dd->first_user_ctxt) ?
                dd->lastctxt_piobuf / (dd->cfgctxts - dd->first_user_ctxt) : 0;

        /*
         * If we have 16 user contexts, we will have 7 sbufs
         * per context, so reduce the update threshold to match.  We
         * want to update before we actually run out, at low pbufs/ctxt
         * so give ourselves some margin.
         */
        if (dd->pbufsctxt >= 2 && dd->pbufsctxt - 2 < updthresh)
                updthresh = dd->pbufsctxt - 2;
        dd->cspec->updthresh_dflt = updthresh;
        dd->cspec->updthresh = updthresh;

        /* before full enable, no interrupts, no locking needed */
        dd->sendctrl |= ((updthresh & SYM_RMASK(SendCtrl, AvailUpdThld))
                             << SYM_LSB(SendCtrl, AvailUpdThld)) |
                        SYM_MASK(SendCtrl, SendBufAvailPad64Byte);

        dd->psxmitwait_supported = 1;
        dd->psxmitwait_check_rate = QIB_7322_PSXMITWAIT_CHECK_RATE;
bail:
        if (!dd->ctxtcnt)
                dd->ctxtcnt = 1; /* for other initialization code */

        return ret;
}

static u32 __iomem *qib_7322_getsendbuf(struct qib_pportdata *ppd, u64 pbc,
                                        u32 *pbufnum)
{
        u32 first, last, plen = pbc & QIB_PBC_LENGTH_MASK;
        struct qib_devdata *dd = ppd->dd;

        /* last is same for 2k and 4k, because we use 4k if all 2k busy */
        if (pbc & PBC_7322_VL15_SEND) {
                first = dd->piobcnt2k + dd->piobcnt4k + ppd->hw_pidx;
                last = first;
        } else {
                if ((plen + 1) > dd->piosize2kmax_dwords)
                        first = dd->piobcnt2k;
                else
                        first = 0;
                last = dd->cspec->lastbuf_for_pio;
        }
        return qib_getsendbuf_range(dd, pbufnum, first, last);
}

static void qib_set_cntr_7322_sample(struct qib_pportdata *ppd, u32 intv,
                                     u32 start)
{
        qib_write_kreg_port(ppd, krp_psinterval, intv);
        qib_write_kreg_port(ppd, krp_psstart, start);
}

/*
 * Must be called with sdma_lock held, or before init finished.
 */
static void qib_sdma_set_7322_desc_cnt(struct qib_pportdata *ppd, unsigned cnt)
{
        qib_write_kreg_port(ppd, krp_senddmadesccnt, cnt);
}

static struct sdma_set_state_action sdma_7322_action_table[] = {
        [qib_sdma_state_s00_hw_down] = {
                .go_s99_running_tofalse = 1,
                .op_enable = 0,
                .op_intenable = 0,
                .op_halt = 0,
                .op_drain = 0,
        },
        [qib_sdma_state_s10_hw_start_up_wait] = {
                .op_enable = 0,
                .op_intenable = 1,
                .op_halt = 1,
                .op_drain = 0,
        },
        [qib_sdma_state_s20_idle] = {
                .op_enable = 1,
                .op_intenable = 1,
                .op_halt = 1,
                .op_drain = 0,
        },
        [qib_sdma_state_s30_sw_clean_up_wait] = {
                .op_enable = 0,
                .op_intenable = 1,
                .op_halt = 1,
                .op_drain = 0,
        },
        [qib_sdma_state_s40_hw_clean_up_wait] = {
                .op_enable = 1,
                .op_intenable = 1,
                .op_halt = 1,
                .op_drain = 0,
        },
        [qib_sdma_state_s50_hw_halt_wait] = {
                .op_enable = 1,
                .op_intenable = 1,
                .op_halt = 1,
                .op_drain = 1,
        },
        [qib_sdma_state_s99_running] = {
                .op_enable = 1,
                .op_intenable = 1,
                .op_halt = 0,
                .op_drain = 0,
                .go_s99_running_totrue = 1,
        },
};

static void qib_7322_sdma_init_early(struct qib_pportdata *ppd)
{
        ppd->sdma_state.set_state_action = sdma_7322_action_table;
}

static int init_sdma_7322_regs(struct qib_pportdata *ppd)
{
        struct qib_devdata *dd = ppd->dd;
        unsigned lastbuf, erstbuf;
        u64 senddmabufmask[3] = { 0 };
        int n, ret = 0;

        qib_write_kreg_port(ppd, krp_senddmabase, ppd->sdma_descq_phys);
        qib_sdma_7322_setlengen(ppd);
        qib_sdma_update_7322_tail(ppd, 0); /* Set SendDmaTail */
        qib_write_kreg_port(ppd, krp_senddmareloadcnt, sdma_idle_cnt);
        qib_write_kreg_port(ppd, krp_senddmadesccnt, 0);
        qib_write_kreg_port(ppd, krp_senddmaheadaddr, ppd->sdma_head_phys);

        if (dd->num_pports)
                n = dd->cspec->sdmabufcnt / dd->num_pports; /* no remainder */
        else
                n = dd->cspec->sdmabufcnt; /* failsafe for init */
        erstbuf = (dd->piobcnt2k + dd->piobcnt4k) -
                ((dd->num_pports == 1 || ppd->port == 2) ? n :
                dd->cspec->sdmabufcnt);
        lastbuf = erstbuf + n;

        ppd->sdma_state.first_sendbuf = erstbuf;
        ppd->sdma_state.last_sendbuf = lastbuf;
        for (; erstbuf < lastbuf; ++erstbuf) {
                unsigned word = erstbuf / BITS_PER_LONG;
                unsigned bit = erstbuf & (BITS_PER_LONG - 1);

                BUG_ON(word >= 3);
                senddmabufmask[word] |= 1ULL << bit;
        }
        qib_write_kreg_port(ppd, krp_senddmabufmask0, senddmabufmask[0]);
        qib_write_kreg_port(ppd, krp_senddmabufmask1, senddmabufmask[1]);
        qib_write_kreg_port(ppd, krp_senddmabufmask2, senddmabufmask[2]);
        return ret;
}

/* sdma_lock must be held */
static u16 qib_sdma_7322_gethead(struct qib_pportdata *ppd)
{
        struct qib_devdata *dd = ppd->dd;
        int sane;
        int use_dmahead;
        u16 swhead;
        u16 swtail;
        u16 cnt;
        u16 hwhead;

        use_dmahead = __qib_sdma_running(ppd) &&
                (dd->flags & QIB_HAS_SDMA_TIMEOUT);
retry:
        hwhead = use_dmahead ?
                (u16) le64_to_cpu(*ppd->sdma_head_dma) :
                (u16) qib_read_kreg_port(ppd, krp_senddmahead);

        swhead = ppd->sdma_descq_head;
        swtail = ppd->sdma_descq_tail;
        cnt = ppd->sdma_descq_cnt;

        if (swhead < swtail)
                /* not wrapped */
                sane = (hwhead >= swhead) & (hwhead <= swtail);
        else if (swhead > swtail)
                /* wrapped around */
                sane = ((hwhead >= swhead) && (hwhead < cnt)) ||
                        (hwhead <= swtail);
        else
                /* empty */
                sane = (hwhead == swhead);

        if (unlikely(!sane)) {
                if (use_dmahead) {
                        /* try one more time, directly from the register */
                        use_dmahead = 0;
                        goto retry;
                }
                /* proceed as if no progress */
                hwhead = swhead;
        }

        return hwhead;
}

static int qib_sdma_7322_busy(struct qib_pportdata *ppd)
{
        u64 hwstatus = qib_read_kreg_port(ppd, krp_senddmastatus);

        return (hwstatus & SYM_MASK(SendDmaStatus_0, ScoreBoardDrainInProg)) ||
               (hwstatus & SYM_MASK(SendDmaStatus_0, HaltInProg)) ||
               !(hwstatus & SYM_MASK(SendDmaStatus_0, InternalSDmaHalt)) ||
               !(hwstatus & SYM_MASK(SendDmaStatus_0, ScbEmpty));
}

/*
 * Compute the amount of delay before sending the next packet if the
 * port's send rate differs from the static rate set for the QP.
 * The delay affects the next packet and the amount of the delay is
 * based on the length of the this packet.
 */
static u32 qib_7322_setpbc_control(struct qib_pportdata *ppd, u32 plen,
                                   u8 srate, u8 vl)
{
        u8 snd_mult = ppd->delay_mult;
        u8 rcv_mult = ib_rate_to_delay[srate];
        u32 ret;

        ret = rcv_mult > snd_mult ? ((plen + 1) >> 1) * snd_mult : 0;

        /* Indicate VL15, else set the VL in the control word */
        if (vl == 15)
                ret |= PBC_7322_VL15_SEND_CTRL;
        else
                ret |= vl << PBC_VL_NUM_LSB;
        ret |= ((u32)(ppd->hw_pidx)) << PBC_PORT_SEL_LSB;

        return ret;
}

/*
 * Enable the per-port VL15 send buffers for use.
 * They follow the rest of the buffers, without a config parameter.
 * This was in initregs, but that is done before the shadow
 * is set up, and this has to be done after the shadow is
 * set up.
 */
static void qib_7322_initvl15_bufs(struct qib_devdata *dd)
{
        unsigned vl15bufs;

        vl15bufs = dd->piobcnt2k + dd->piobcnt4k;
        qib_chg_pioavailkernel(dd, vl15bufs, NUM_VL15_BUFS,
                               TXCHK_CHG_TYPE_KERN, NULL);
}

static void qib_7322_init_ctxt(struct qib_ctxtdata *rcd)
{
        if (rcd->ctxt < NUM_IB_PORTS) {
                if (rcd->dd->num_pports > 1) {
                        rcd->rcvegrcnt = KCTXT0_EGRCNT / 2;
                        rcd->rcvegr_tid_base = rcd->ctxt ? rcd->rcvegrcnt : 0;
                } else {
                        rcd->rcvegrcnt = KCTXT0_EGRCNT;
                        rcd->rcvegr_tid_base = 0;
                }
        } else {
                rcd->rcvegrcnt = rcd->dd->cspec->rcvegrcnt;
                rcd->rcvegr_tid_base = KCTXT0_EGRCNT +
                        (rcd->ctxt - NUM_IB_PORTS) * rcd->rcvegrcnt;
        }
}

#define QTXSLEEPS 5000
static void qib_7322_txchk_change(struct qib_devdata *dd, u32 start,
                                  u32 len, u32 which, struct qib_ctxtdata *rcd)
{
        int i;
        const int last = start + len - 1;
        const int lastr = last / BITS_PER_LONG;
        u32 sleeps = 0;
        int wait = rcd != NULL;
        unsigned long flags;

        while (wait) {
                unsigned long shadow;
                int cstart, previ = -1;

                /*
                 * when flipping from kernel to user, we can't change
                 * the checking type if the buffer is allocated to the
                 * driver.   It's OK the other direction, because it's
                 * from close, and we have just disarm'ed all the
                 * buffers.  All the kernel to kernel changes are also
                 * OK.
                 */
                for (cstart = start; cstart <= last; cstart++) {
                        i = ((2 * cstart) + QLOGIC_IB_SENDPIOAVAIL_BUSY_SHIFT)
                                / BITS_PER_LONG;
                        if (i != previ) {
                                shadow = (unsigned long)
                                        le64_to_cpu(dd->pioavailregs_dma[i]);
                                previ = i;
                        }
                        if (test_bit(((2 * cstart) +
                                      QLOGIC_IB_SENDPIOAVAIL_BUSY_SHIFT)
                                     % BITS_PER_LONG, &shadow))
                                break;
                }

                if (cstart > last)
                        break;

                if (sleeps == QTXSLEEPS)
                        break;
                /* make sure we see an updated copy next time around */
                sendctrl_7322_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
                sleeps++;
                msleep(20);
        }

        switch (which) {
        case TXCHK_CHG_TYPE_DIS1:
                /*
                 * disable checking on a range; used by diags; just
                 * one buffer, but still written generically
                 */
                for (i = start; i <= last; i++)
                        clear_bit(i, dd->cspec->sendchkenable);
                break;

        case TXCHK_CHG_TYPE_ENAB1:
                /*
                 * (re)enable checking on a range; used by diags; just
                 * one buffer, but still written generically; read
                 * scratch to be sure buffer actually triggered, not
                 * just flushed from processor.
                 */
                qib_read_kreg32(dd, kr_scratch);
                for (i = start; i <= last; i++)
                        set_bit(i, dd->cspec->sendchkenable);
                break;

        case TXCHK_CHG_TYPE_KERN:
                /* usable by kernel */
                for (i = start; i <= last; i++) {
                        set_bit(i, dd->cspec->sendibchk);
                        clear_bit(i, dd->cspec->sendgrhchk);
                }
                spin_lock_irqsave(&dd->uctxt_lock, flags);
                /* see if we need to raise avail update threshold */
                for (i = dd->first_user_ctxt;
                     dd->cspec->updthresh != dd->cspec->updthresh_dflt
                     && i < dd->cfgctxts; i++)
                        if (dd->rcd[i] && dd->rcd[i]->subctxt_cnt &&
                           ((dd->rcd[i]->piocnt / dd->rcd[i]->subctxt_cnt) - 1)
                           < dd->cspec->updthresh_dflt)
                                break;
                spin_unlock_irqrestore(&dd->uctxt_lock, flags);
                if (i == dd->cfgctxts) {
                        spin_lock_irqsave(&dd->sendctrl_lock, flags);
                        dd->cspec->updthresh = dd->cspec->updthresh_dflt;
                        dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
                        dd->sendctrl |= (dd->cspec->updthresh &
                                         SYM_RMASK(SendCtrl, AvailUpdThld)) <<
                                           SYM_LSB(SendCtrl, AvailUpdThld);
                        spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
                        sendctrl_7322_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
                }
                break;

        case TXCHK_CHG_TYPE_USER:
                /* for user process */
                for (i = start; i <= last; i++) {
                        clear_bit(i, dd->cspec->sendibchk);
                        set_bit(i, dd->cspec->sendgrhchk);
                }
                spin_lock_irqsave(&dd->sendctrl_lock, flags);
                if (rcd && rcd->subctxt_cnt && ((rcd->piocnt
                        / rcd->subctxt_cnt) - 1) < dd->cspec->updthresh) {
                        dd->cspec->updthresh = (rcd->piocnt /
                                                rcd->subctxt_cnt) - 1;
                        dd->sendctrl &= ~SYM_MASK(SendCtrl, AvailUpdThld);
                        dd->sendctrl |= (dd->cspec->updthresh &
                                        SYM_RMASK(SendCtrl, AvailUpdThld))
                                        << SYM_LSB(SendCtrl, AvailUpdThld);
                        spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
                        sendctrl_7322_mod(dd->pport, QIB_SENDCTRL_AVAIL_BLIP);
                } else
                        spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
                break;

        default:
                break;
        }

        for (i = start / BITS_PER_LONG; which >= 2 && i <= lastr; ++i)
                qib_write_kreg(dd, kr_sendcheckmask + i,
                               dd->cspec->sendchkenable[i]);

        for (i = start / BITS_PER_LONG; which < 2 && i <= lastr; ++i) {
                qib_write_kreg(dd, kr_sendgrhcheckmask + i,
                               dd->cspec->sendgrhchk[i]);
                qib_write_kreg(dd, kr_sendibpktmask + i,
                               dd->cspec->sendibchk[i]);
        }

        /*
         * Be sure whatever we did was seen by the chip and acted upon,
         * before we return.  Mostly important for which >= 2.
         */
        qib_read_kreg32(dd, kr_scratch);
}


/* useful for trigger analyzers, etc. */
static void writescratch(struct qib_devdata *dd, u32 val)
{
        qib_write_kreg(dd, kr_scratch, val);
}

/* Dummy for now, use chip regs soon */
static int qib_7322_tempsense_rd(struct qib_devdata *dd, int regnum)
{
        return -ENXIO;
}

/**
 * qib_init_iba7322_funcs - set up the chip-specific function pointers
 * @dev: the pci_dev for qlogic_ib device
 * @ent: pci_device_id struct for this dev
 *
 * Also allocates, inits, and returns the devdata struct for this
 * device instance
 *
 * This is global, and is called directly at init to set up the
 * chip-specific function pointers for later use.
 */
struct qib_devdata *qib_init_iba7322_funcs(struct pci_dev *pdev,
                                           const struct pci_device_id *ent)
{
        struct qib_devdata *dd;
        int ret, i;
        u32 tabsize, actual_cnt = 0;

        dd = qib_alloc_devdata(pdev,
                NUM_IB_PORTS * sizeof(struct qib_pportdata) +
                sizeof(struct qib_chip_specific) +
                NUM_IB_PORTS * sizeof(struct qib_chippport_specific));
        if (IS_ERR(dd))
                goto bail;

        dd->f_bringup_serdes    = qib_7322_bringup_serdes;
        dd->f_cleanup           = qib_setup_7322_cleanup;
        dd->f_clear_tids        = qib_7322_clear_tids;
        dd->f_free_irq          = qib_7322_free_irq;
        dd->f_get_base_info     = qib_7322_get_base_info;
        dd->f_get_msgheader     = qib_7322_get_msgheader;
        dd->f_getsendbuf        = qib_7322_getsendbuf;
        dd->f_gpio_mod          = gpio_7322_mod;
        dd->f_eeprom_wen        = qib_7322_eeprom_wen;
        dd->f_hdrqempty         = qib_7322_hdrqempty;
        dd->f_ib_updown         = qib_7322_ib_updown;
        dd->f_init_ctxt         = qib_7322_init_ctxt;
        dd->f_initvl15_bufs     = qib_7322_initvl15_bufs;
        dd->f_intr_fallback     = qib_7322_intr_fallback;
        dd->f_late_initreg      = qib_late_7322_initreg;
        dd->f_setpbc_control    = qib_7322_setpbc_control;
        dd->f_portcntr          = qib_portcntr_7322;
        dd->f_put_tid           = qib_7322_put_tid;
        dd->f_quiet_serdes      = qib_7322_mini_quiet_serdes;
        dd->f_rcvctrl           = rcvctrl_7322_mod;
        dd->f_read_cntrs        = qib_read_7322cntrs;
        dd->f_read_portcntrs    = qib_read_7322portcntrs;
        dd->f_reset             = qib_do_7322_reset;
        dd->f_init_sdma_regs    = init_sdma_7322_regs;
        dd->f_sdma_busy         = qib_sdma_7322_busy;
        dd->f_sdma_gethead      = qib_sdma_7322_gethead;
        dd->f_sdma_sendctrl     = qib_7322_sdma_sendctrl;
        dd->f_sdma_set_desc_cnt = qib_sdma_set_7322_desc_cnt;
        dd->f_sdma_update_tail  = qib_sdma_update_7322_tail;
        dd->f_sendctrl          = sendctrl_7322_mod;
        dd->f_set_armlaunch     = qib_set_7322_armlaunch;
        dd->f_set_cntr_sample   = qib_set_cntr_7322_sample;
        dd->f_iblink_state      = qib_7322_iblink_state;
        dd->f_ibphys_portstate  = qib_7322_phys_portstate;
        dd->f_get_ib_cfg        = qib_7322_get_ib_cfg;
        dd->f_set_ib_cfg        = qib_7322_set_ib_cfg;
        dd->f_set_ib_loopback   = qib_7322_set_loopback;
        dd->f_get_ib_table      = qib_7322_get_ib_table;
        dd->f_set_ib_table      = qib_7322_set_ib_table;
        dd->f_set_intr_state    = qib_7322_set_intr_state;
        dd->f_setextled         = qib_setup_7322_setextled;
        dd->f_txchk_change      = qib_7322_txchk_change;
        dd->f_update_usrhead    = qib_update_7322_usrhead;
        dd->f_wantpiobuf_intr   = qib_wantpiobuf_7322_intr;
        dd->f_xgxs_reset        = qib_7322_mini_pcs_reset;
        dd->f_sdma_hw_clean_up  = qib_7322_sdma_hw_clean_up;
        dd->f_sdma_hw_start_up  = qib_7322_sdma_hw_start_up;
        dd->f_sdma_init_early   = qib_7322_sdma_init_early;
        dd->f_writescratch      = writescratch;
        dd->f_tempsense_rd      = qib_7322_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, but chip registers
         * are not set up until start of qib_init_7322_variables.
         */
        ret = qib_pcie_ddinit(dd, pdev, ent);
        if (ret < 0)
                goto bail_free;

        /* initialize chip-specific variables */
        ret = qib_init_7322_variables(dd);
        if (ret)
                goto bail_cleanup;

        if (qib_mini_init || !dd->num_pports)
                goto bail;

        /*
         * Determine number of vectors we want; depends on port count
         * and number of configured kernel receive queues actually used.
         * Should also depend on whether sdma is enabled or not, but
         * that's such a rare testing case it's not worth worrying about.
         */
        tabsize = dd->first_user_ctxt + ARRAY_SIZE(irq_table);
        for (i = 0; i < tabsize; i++)
                if ((i < ARRAY_SIZE(irq_table) &&
                     irq_table[i].port <= dd->num_pports) ||
                    (i >= ARRAY_SIZE(irq_table) &&
                     dd->rcd[i - ARRAY_SIZE(irq_table)]))
                        actual_cnt++;
        /* reduce by ctxt's < 2 */
        if (qib_krcvq01_no_msi)
                actual_cnt -= dd->num_pports;

        tabsize = actual_cnt;
        dd->cspec->msix_entries = kmalloc(tabsize *
                        sizeof(struct msix_entry), GFP_KERNEL);
        dd->cspec->msix_arg = kmalloc(tabsize *
                        sizeof(void *), GFP_KERNEL);
        if (!dd->cspec->msix_entries || !dd->cspec->msix_arg) {
                qib_dev_err(dd, "No memory for MSIx table\n");
                tabsize = 0;
        }
        for (i = 0; i < tabsize; i++)
                dd->cspec->msix_entries[i].entry = i;

        if (qib_pcie_params(dd, 8, &tabsize, dd->cspec->msix_entries))
                qib_dev_err(dd, "Failed to setup PCIe or interrupts; "
                            "continuing anyway\n");
        /* may be less than we wanted, if not enough available */
        dd->cspec->num_msix_entries = tabsize;

        /* setup interrupt handler */
        qib_setup_7322_interrupt(dd, 1);

        /* clear diagctrl register, in case diags were running and crashed */
        qib_write_kreg(dd, kr_hwdiagctrl, 0);

        goto bail;

bail_cleanup:
        qib_pcie_ddcleanup(dd);
bail_free:
        qib_free_devdata(dd);
        dd = ERR_PTR(ret);
bail:
        return dd;
}

/*
 * Set the table entry at the specified index from the table specifed.
 * There are 3 * TXDDS_TABLE_SZ entries in all per port, with the first
 * TXDDS_TABLE_SZ for SDR, the next for DDR, and the last for QDR.
 * 'idx' below addresses the correct entry, while its 4 LSBs select the
 * corresponding entry (one of TXDDS_TABLE_SZ) from the selected table.
 */
#define DDS_ENT_AMP_LSB 14
#define DDS_ENT_MAIN_LSB 9
#define DDS_ENT_POST_LSB 5
#define DDS_ENT_PRE_XTRA_LSB 3
#define DDS_ENT_PRE_LSB 0

/*
 * Set one entry in the TxDDS table for spec'd port
 * ridx picks one of the entries, while tp points
 * to the appropriate table entry.
 */
static void set_txdds(struct qib_pportdata *ppd, int ridx,
                      const struct txdds_ent *tp)
{
        struct qib_devdata *dd = ppd->dd;
        u32 pack_ent;
        int regidx;

        /* Get correct offset in chip-space, and in source table */
        regidx = KREG_IBPORT_IDX(IBSD_DDS_MAP_TABLE) + ridx;
        /*
         * We do not use qib_write_kreg_port() because it was intended
         * only for registers in the lower "port specific" pages.
         * So do index calculation  by hand.
         */
        if (ppd->hw_pidx)
                regidx += (dd->palign / sizeof(u64));

        pack_ent = tp->amp << DDS_ENT_AMP_LSB;
        pack_ent |= tp->main << DDS_ENT_MAIN_LSB;
        pack_ent |= tp->pre << DDS_ENT_PRE_LSB;
        pack_ent |= tp->post << DDS_ENT_POST_LSB;
        qib_write_kreg(dd, regidx, pack_ent);
        /* Prevent back-to-back writes by hitting scratch */
        qib_write_kreg(ppd->dd, kr_scratch, 0);
}

static const struct vendor_txdds_ent vendor_txdds[] = {
        { /* Amphenol 1m 30awg NoEq */
                { 0x41, 0x50, 0x48 }, "584470002       ",
                { 10,  0,  0,  5 }, { 10,  0,  0,  9 }, {  7,  1,  0, 13 },
        },
        { /* Amphenol 3m 28awg NoEq */
                { 0x41, 0x50, 0x48 }, "584470004       ",
                {  0,  0,  0,  8 }, {  0,  0,  0, 11 }, {  0,  1,  7, 15 },
        },
        { /* Finisar 3m OM2 Optical */
                { 0x00, 0x90, 0x65 }, "FCBG410QB1C03-QL",
                {  0,  0,  0,  3 }, {  0,  0,  0,  4 }, {  0,  0,  0, 13 },
        },
        { /* Finisar 30m OM2 Optical */
                { 0x00, 0x90, 0x65 }, "FCBG410QB1C30-QL",
                {  0,  0,  0,  1 }, {  0,  0,  0,  5 }, {  0,  0,  0, 11 },
        },
        { /* Finisar Default OM2 Optical */
                { 0x00, 0x90, 0x65 }, NULL,
                {  0,  0,  0,  2 }, {  0,  0,  0,  5 }, {  0,  0,  0, 12 },
        },
        { /* Gore 1m 30awg NoEq */
                { 0x00, 0x21, 0x77 }, "QSN3300-1       ",
                {  0,  0,  0,  6 }, {  0,  0,  0,  9 }, {  0,  1,  0, 15 },
        },
        { /* Gore 2m 30awg NoEq */
                { 0x00, 0x21, 0x77 }, "QSN3300-2       ",
                {  0,  0,  0,  8 }, {  0,  0,  0, 10 }, {  0,  1,  7, 15 },
        },
        { /* Gore 1m 28awg NoEq */
                { 0x00, 0x21, 0x77 }, "QSN3800-1       ",
                {  0,  0,  0,  6 }, {  0,  0,  0,  8 }, {  0,  1,  0, 15 },
        },
        { /* Gore 3m 28awg NoEq */
                { 0x00, 0x21, 0x77 }, "QSN3800-3       ",
                {  0,  0,  0,  9 }, {  0,  0,  0, 13 }, {  0,  1,  7, 15 },
        },
        { /* Gore 5m 24awg Eq */
                { 0x00, 0x21, 0x77 }, "QSN7000-5       ",
                {  0,  0,  0,  7 }, {  0,  0,  0,  9 }, {  0,  1,  3, 15 },
        },
        { /* Gore 7m 24awg Eq */
                { 0x00, 0x21, 0x77 }, "QSN7000-7       ",
                {  0,  0,  0,  9 }, {  0,  0,  0, 11 }, {  0,  2,  6, 15 },
        },
        { /* Gore 5m 26awg Eq */
                { 0x00, 0x21, 0x77 }, "QSN7600-5       ",
                {  0,  0,  0,  8 }, {  0,  0,  0, 11 }, {  0,  1,  9, 13 },
        },
        { /* Gore 7m 26awg Eq */
                { 0x00, 0x21, 0x77 }, "QSN7600-7       ",
                {  0,  0,  0,  8 }, {  0,  0,  0, 11 }, {  10,  1,  8, 15 },
        },
        { /* Intersil 12m 24awg Active */
                { 0x00, 0x30, 0xB4 }, "QLX4000CQSFP1224",
                {  0,  0,  0,  2 }, {  0,  0,  0,  5 }, {  0,  3,  0,  9 },
        },
        { /* Intersil 10m 28awg Active */
                { 0x00, 0x30, 0xB4 }, "QLX4000CQSFP1028",
                {  0,  0,  0,  6 }, {  0,  0,  0,  4 }, {  0,  2,  0,  2 },
        },
        { /* Intersil 7m 30awg Active */
                { 0x00, 0x30, 0xB4 }, "QLX4000CQSFP0730",
                {  0,  0,  0,  6 }, {  0,  0,  0,  4 }, {  0,  1,  0,  3 },
        },
        { /* Intersil 5m 32awg Active */
                { 0x00, 0x30, 0xB4 }, "QLX4000CQSFP0532",
                {  0,  0,  0,  6 }, {  0,  0,  0,  6 }, {  0,  2,  0,  8 },
        },
        { /* Intersil Default Active */
                { 0x00, 0x30, 0xB4 }, NULL,
                {  0,  0,  0,  6 }, {  0,  0,  0,  5 }, {  0,  2,  0,  5 },
        },
        { /* Luxtera 20m Active Optical */
                { 0x00, 0x25, 0x63 }, NULL,
                {  0,  0,  0,  5 }, {  0,  0,  0,  8 }, {  0,  2,  0,  12 },
        },
        { /* Molex 1M Cu loopback */
                { 0x00, 0x09, 0x3A }, "74763-0025      ",
                {  2,  2,  6, 15 }, {  2,  2,  6, 15 }, {  2,  2,  6, 15 },
        },
        { /* Molex 2m 28awg NoEq */
                { 0x00, 0x09, 0x3A }, "74757-2201      ",
                {  0,  0,  0,  6 }, {  0,  0,  0,  9 }, {  0,  1,  1, 15 },
        },
};

static const struct txdds_ent txdds_sdr[TXDDS_TABLE_SZ] = {
        /* amp, pre, main, post */
        {  2, 2, 15,  6 },      /* Loopback */
        {  0, 0,  0,  1 },      /*  2 dB */
        {  0, 0,  0,  2 },      /*  3 dB */
        {  0, 0,  0,  3 },      /*  4 dB */
        {  0, 0,  0,  4 },      /*  5 dB */
        {  0, 0,  0,  5 },      /*  6 dB */
        {  0, 0,  0,  6 },      /*  7 dB */
        {  0, 0,  0,  7 },      /*  8 dB */
        {  0, 0,  0,  8 },      /*  9 dB */
        {  0, 0,  0,  9 },      /* 10 dB */
        {  0, 0,  0, 10 },      /* 11 dB */
        {  0, 0,  0, 11 },      /* 12 dB */
        {  0, 0,  0, 12 },      /* 13 dB */
        {  0, 0,  0, 13 },      /* 14 dB */
        {  0, 0,  0, 14 },      /* 15 dB */
        {  0, 0,  0, 15 },      /* 16 dB */
};

static const struct txdds_ent txdds_ddr[TXDDS_TABLE_SZ] = {
        /* amp, pre, main, post */
        {  2, 2, 15,  6 },      /* Loopback */
        {  0, 0,  0,  8 },      /*  2 dB */
        {  0, 0,  0,  8 },      /*  3 dB */
        {  0, 0,  0,  9 },      /*  4 dB */
        {  0, 0,  0,  9 },      /*  5 dB */
        {  0, 0,  0, 10 },      /*  6 dB */
        {  0, 0,  0, 10 },      /*  7 dB */
        {  0, 0,  0, 11 },      /*  8 dB */
        {  0, 0,  0, 11 },      /*  9 dB */
        {  0, 0,  0, 12 },      /* 10 dB */
        {  0, 0,  0, 12 },      /* 11 dB */
        {  0, 0,  0, 13 },      /* 12 dB */
        {  0, 0,  0, 13 },      /* 13 dB */
        {  0, 0,  0, 14 },      /* 14 dB */
        {  0, 0,  0, 14 },      /* 15 dB */
        {  0, 0,  0, 15 },      /* 16 dB */
};

static const struct txdds_ent txdds_qdr[TXDDS_TABLE_SZ] = {
        /* amp, pre, main, post */
        {  2, 2, 15,  6 },      /* Loopback */
        {  0, 1,  0,  7 },      /*  2 dB (also QMH7342) */
        {  0, 1,  0,  9 },      /*  3 dB (also QMH7342) */
        {  0, 1,  0, 11 },      /*  4 dB */
        {  0, 1,  0, 13 },      /*  5 dB */
        {  0, 1,  0, 15 },      /*  6 dB */
        {  0, 1,  3, 15 },      /*  7 dB */
        {  0, 1,  7, 15 },      /*  8 dB */
        {  0, 1,  7, 15 },      /*  9 dB */
        {  0, 1,  8, 15 },      /* 10 dB */
        {  0, 1,  9, 15 },      /* 11 dB */
        {  0, 1, 10, 15 },      /* 12 dB */
        {  0, 2,  6, 15 },      /* 13 dB */
        {  0, 2,  7, 15 },      /* 14 dB */
        {  0, 2,  8, 15 },      /* 15 dB */
        {  0, 2,  9, 15 },      /* 16 dB */
};

/*
 * extra entries for use with txselect, for indices >= TXDDS_TABLE_SZ.
 * These are mostly used for mez cards going through connectors
 * and backplane traces, but can be used to add other "unusual"
 * table values as well.
 */
static const struct txdds_ent txdds_extra_sdr[TXDDS_EXTRA_SZ] = {
        /* amp, pre, main, post */
        {  0, 0, 0,  1 },       /* QMH7342 backplane settings */
        {  0, 0, 0,  1 },       /* QMH7342 backplane settings */
        {  0, 0, 0,  2 },       /* QMH7342 backplane settings */
        {  0, 0, 0,  2 },       /* QMH7342 backplane settings */
        {  0, 0, 0, 11 },       /* QME7342 backplane settings */
        {  0, 0, 0, 11 },       /* QME7342 backplane settings */
        {  0, 0, 0, 11 },       /* QME7342 backplane settings */
        {  0, 0, 0, 11 },       /* QME7342 backplane settings */
        {  0, 0, 0, 11 },       /* QME7342 backplane settings */
        {  0, 0, 0, 11 },       /* QME7342 backplane settings */
        {  0, 0, 0, 11 },       /* QME7342 backplane settings */
        {  0, 0, 0,  3 },       /* QMH7342 backplane settings */
        {  0, 0, 0,  4 },       /* QMH7342 backplane settings */
};

static const struct txdds_ent txdds_extra_ddr[TXDDS_EXTRA_SZ] = {
        /* amp, pre, main, post */
        {  0, 0, 0,  7 },       /* QMH7342 backplane settings */
        {  0, 0, 0,  7 },       /* QMH7342 backplane settings */
        {  0, 0, 0,  8 },       /* QMH7342 backplane settings */
        {  0, 0, 0,  8 },       /* QMH7342 backplane settings */
        {  0, 0, 0, 13 },       /* QME7342 backplane settings */
        {  0, 0, 0, 13 },       /* QME7342 backplane settings */
        {  0, 0, 0, 13 },       /* QME7342 backplane settings */
        {  0, 0, 0, 13 },       /* QME7342 backplane settings */
        {  0, 0, 0, 13 },       /* QME7342 backplane settings */
        {  0, 0, 0, 13 },       /* QME7342 backplane settings */
        {  0, 0, 0, 13 },       /* QME7342 backplane settings */
        {  0, 0, 0,  9 },       /* QMH7342 backplane settings */
        {  0, 0, 0, 10 },       /* QMH7342 backplane settings */
};

static const struct txdds_ent txdds_extra_qdr[TXDDS_EXTRA_SZ] = {
        /* amp, pre, main, post */
        {  0, 1,  0,  4 },      /* QMH7342 backplane settings */
        {  0, 1,  0,  5 },      /* QMH7342 backplane settings */
        {  0, 1,  0,  6 },      /* QMH7342 backplane settings */
        {  0, 1,  0,  8 },      /* QMH7342 backplane settings */
        {  0, 1, 12, 10 },      /* QME7342 backplane setting */
        {  0, 1, 12, 11 },      /* QME7342 backplane setting */
        {  0, 1, 12, 12 },      /* QME7342 backplane setting */
        {  0, 1, 12, 14 },      /* QME7342 backplane setting */
        {  0, 1, 12,  6 },      /* QME7342 backplane setting */
        {  0, 1, 12,  7 },      /* QME7342 backplane setting */
        {  0, 1, 12,  8 },      /* QME7342 backplane setting */
        {  0, 1,  0, 10 },      /* QMH7342 backplane settings */
        {  0, 1,  0, 12 },      /* QMH7342 backplane settings */
};

static const struct txdds_ent txdds_extra_mfg[TXDDS_MFG_SZ] = {
        /* amp, pre, main, post */
        { 0, 0, 0, 0 },         /* QME7342 mfg settings */
        { 0, 0, 0, 6 },         /* QME7342 P2 mfg settings */
};

static const struct txdds_ent *get_atten_table(const struct txdds_ent *txdds,
                                               unsigned atten)
{
        /*
         * The attenuation table starts at 2dB for entry 1,
         * with entry 0 being the loopback entry.
         */
        if (atten <= 2)
                atten = 1;
        else if (atten > TXDDS_TABLE_SZ)
                atten = TXDDS_TABLE_SZ - 1;
        else
                atten--;
        return txdds + atten;
}

/*
 * if override is set, the module parameter txselect has a value
 * for this specific port, so use it, rather than our normal mechanism.
 */
static void find_best_ent(struct qib_pportdata *ppd,
                          const struct txdds_ent **sdr_dds,
                          const struct txdds_ent **ddr_dds,
                          const struct txdds_ent **qdr_dds, int override)
{
        struct qib_qsfp_cache *qd = &ppd->cpspec->qsfp_data.cache;
        int idx;

        /* Search table of known cables */
        for (idx = 0; !override && idx < ARRAY_SIZE(vendor_txdds); ++idx) {
                const struct vendor_txdds_ent *v = vendor_txdds + idx;

                if (!memcmp(v->oui, qd->oui, QSFP_VOUI_LEN) &&
                    (!v->partnum ||
                     !memcmp(v->partnum, qd->partnum, QSFP_PN_LEN))) {
                        *sdr_dds = &v->sdr;
                        *ddr_dds = &v->ddr;
                        *qdr_dds = &v->qdr;
                        return;
                }
        }

        /* Lookup serdes setting by cable type and attenuation */
        if (!override && QSFP_IS_ACTIVE(qd->tech)) {
                *sdr_dds = txdds_sdr + ppd->dd->board_atten;
                *ddr_dds = txdds_ddr + ppd->dd->board_atten;
                *qdr_dds = txdds_qdr + ppd->dd->board_atten;
                return;
        }

        if (!override && QSFP_HAS_ATTEN(qd->tech) && (qd->atten[0] ||
                                                      qd->atten[1])) {
                *sdr_dds = get_atten_table(txdds_sdr, qd->atten[0]);
                *ddr_dds = get_atten_table(txdds_ddr, qd->atten[0]);
                *qdr_dds = get_atten_table(txdds_qdr, qd->atten[1]);
                return;
        } else if (ppd->cpspec->no_eep < TXDDS_TABLE_SZ) {
                /*
                 * If we have no (or incomplete) data from the cable
                 * EEPROM, or no QSFP, or override is set, use the
                 * module parameter value to index into the attentuation
                 * table.
                 */
                idx = ppd->cpspec->no_eep;
                *sdr_dds = &txdds_sdr[idx];
                *ddr_dds = &txdds_ddr[idx];
                *qdr_dds = &txdds_qdr[idx];
        } else if (ppd->cpspec->no_eep < (TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ)) {
                /* similar to above, but index into the "extra" table. */
                idx = ppd->cpspec->no_eep - TXDDS_TABLE_SZ;
                *sdr_dds = &txdds_extra_sdr[idx];
                *ddr_dds = &txdds_extra_ddr[idx];
                *qdr_dds = &txdds_extra_qdr[idx];
        } else if ((IS_QME(ppd->dd) || IS_QMH(ppd->dd)) &&
                   ppd->cpspec->no_eep < (TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ +
                                          TXDDS_MFG_SZ)) {
                idx = ppd->cpspec->no_eep - (TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ);
                printk(KERN_INFO QIB_DRV_NAME
                        " IB%u:%u use idx %u into txdds_mfg\n",
                        ppd->dd->unit, ppd->port, idx);
                *sdr_dds = &txdds_extra_mfg[idx];
                *ddr_dds = &txdds_extra_mfg[idx];
                *qdr_dds = &txdds_extra_mfg[idx];
        } else {
                /* this shouldn't happen, it's range checked */
                *sdr_dds = txdds_sdr + qib_long_atten;
                *ddr_dds = txdds_ddr + qib_long_atten;
                *qdr_dds = txdds_qdr + qib_long_atten;
        }
}

static void init_txdds_table(struct qib_pportdata *ppd, int override)
{
        const struct txdds_ent *sdr_dds, *ddr_dds, *qdr_dds;
        struct txdds_ent *dds;
        int idx;
        int single_ent = 0;

        find_best_ent(ppd, &sdr_dds, &ddr_dds, &qdr_dds, override);

        /* for mez cards or override, use the selected value for all entries */
        if (!(ppd->dd->flags & QIB_HAS_QSFP) || override)
                single_ent = 1;

        /* Fill in the first entry with the best entry found. */
        set_txdds(ppd, 0, sdr_dds);
        set_txdds(ppd, TXDDS_TABLE_SZ, ddr_dds);
        set_txdds(ppd, 2 * TXDDS_TABLE_SZ, qdr_dds);
        if (ppd->lflags & (QIBL_LINKINIT | QIBL_LINKARMED |
                QIBL_LINKACTIVE)) {
                dds = (struct txdds_ent *)(ppd->link_speed_active ==
                                           QIB_IB_QDR ?  qdr_dds :
                                           (ppd->link_speed_active ==
                                            QIB_IB_DDR ? ddr_dds : sdr_dds));
                write_tx_serdes_param(ppd, dds);
        }

        /* Fill in the remaining entries with the default table values. */
        for (idx = 1; idx < ARRAY_SIZE(txdds_sdr); ++idx) {
                set_txdds(ppd, idx, single_ent ? sdr_dds : txdds_sdr + idx);
                set_txdds(ppd, idx + TXDDS_TABLE_SZ,
                          single_ent ? ddr_dds : txdds_ddr + idx);
                set_txdds(ppd, idx + 2 * TXDDS_TABLE_SZ,
                          single_ent ? qdr_dds : txdds_qdr + idx);
        }
}

#define KR_AHB_ACC KREG_IDX(ahb_access_ctrl)
#define KR_AHB_TRANS KREG_IDX(ahb_transaction_reg)
#define AHB_TRANS_RDY SYM_MASK(ahb_transaction_reg, ahb_rdy)
#define AHB_ADDR_LSB SYM_LSB(ahb_transaction_reg, ahb_address)
#define AHB_DATA_LSB SYM_LSB(ahb_transaction_reg, ahb_data)
#define AHB_WR SYM_MASK(ahb_transaction_reg, write_not_read)
#define AHB_TRANS_TRIES 10

/*
 * The chan argument is 0=chan0, 1=chan1, 2=pll, 3=chan2, 4=chan4,
 * 5=subsystem which is why most calls have "chan + chan >> 1"
 * for the channel argument.
 */
static u32 ahb_mod(struct qib_devdata *dd, int quad, int chan, int addr,
                    u32 data, u32 mask)
{
        u32 rd_data, wr_data, sz_mask;
        u64 trans, acc, prev_acc;
        u32 ret = 0xBAD0BAD;
        int tries;

        prev_acc = qib_read_kreg64(dd, KR_AHB_ACC);
        /* From this point on, make sure we return access */
        acc = (quad << 1) | 1;
        qib_write_kreg(dd, KR_AHB_ACC, acc);

        for (tries = 1; tries < AHB_TRANS_TRIES; ++tries) {
                trans = qib_read_kreg64(dd, KR_AHB_TRANS);
                if (trans & AHB_TRANS_RDY)
                        break;
        }
        if (tries >= AHB_TRANS_TRIES) {
                qib_dev_err(dd, "No ahb_rdy in %d tries\n", AHB_TRANS_TRIES);
                goto bail;
        }

        /* If mask is not all 1s, we need to read, but different SerDes
         * entities have different sizes
         */
        sz_mask = (1UL << ((quad == 1) ? 32 : 16)) - 1;
        wr_data = data & mask & sz_mask;
        if ((~mask & sz_mask) != 0) {
                trans = ((chan << 6) | addr) << (AHB_ADDR_LSB + 1);
                qib_write_kreg(dd, KR_AHB_TRANS, trans);

                for (tries = 1; tries < AHB_TRANS_TRIES; ++tries) {
                        trans = qib_read_kreg64(dd, KR_AHB_TRANS);
                        if (trans & AHB_TRANS_RDY)
                                break;
                }
                if (tries >= AHB_TRANS_TRIES) {
                        qib_dev_err(dd, "No Rd ahb_rdy in %d tries\n",
                                    AHB_TRANS_TRIES);
                        goto bail;
                }
                /* Re-read in case host split reads and read data first */
                trans = qib_read_kreg64(dd, KR_AHB_TRANS);
                rd_data = (uint32_t)(trans >> AHB_DATA_LSB);
                wr_data |= (rd_data & ~mask & sz_mask);
        }

        /* If mask is not zero, we need to write. */
        if (mask & sz_mask) {
                trans = ((chan << 6) | addr) << (AHB_ADDR_LSB + 1);
                trans |= ((uint64_t)wr_data << AHB_DATA_LSB);
                trans |= AHB_WR;
                qib_write_kreg(dd, KR_AHB_TRANS, trans);

                for (tries = 1; tries < AHB_TRANS_TRIES; ++tries) {
                        trans = qib_read_kreg64(dd, KR_AHB_TRANS);
                        if (trans & AHB_TRANS_RDY)
                                break;
                }
                if (tries >= AHB_TRANS_TRIES) {
                        qib_dev_err(dd, "No Wr ahb_rdy in %d tries\n",
                                    AHB_TRANS_TRIES);
                        goto bail;
                }
        }
        ret = wr_data;
bail:
        qib_write_kreg(dd, KR_AHB_ACC, prev_acc);
        return ret;
}

static void ibsd_wr_allchans(struct qib_pportdata *ppd, int addr, unsigned data,
                             unsigned mask)
{
        struct qib_devdata *dd = ppd->dd;
        int chan;
        u32 rbc;

        for (chan = 0; chan < SERDES_CHANS; ++chan) {
                ahb_mod(dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)), addr,
                        data, mask);
                rbc = ahb_mod(dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                              addr, 0, 0);
        }
}

static void serdes_7322_los_enable(struct qib_pportdata *ppd, int enable)
{
        u64 data = qib_read_kreg_port(ppd, krp_serdesctrl);
        u8 state = SYM_FIELD(data, IBSerdesCtrl_0, RXLOSEN);

        if (enable && !state) {
                printk(KERN_INFO QIB_DRV_NAME " IB%u:%u Turning LOS on\n",
                        ppd->dd->unit, ppd->port);
                data |= SYM_MASK(IBSerdesCtrl_0, RXLOSEN);
        } else if (!enable && state) {
                printk(KERN_INFO QIB_DRV_NAME " IB%u:%u Turning LOS off\n",
                        ppd->dd->unit, ppd->port);
                data &= ~SYM_MASK(IBSerdesCtrl_0, RXLOSEN);
        }
        qib_write_kreg_port(ppd, krp_serdesctrl, data);
}

static int serdes_7322_init(struct qib_pportdata *ppd)
{
        int ret = 0;
        if (ppd->dd->cspec->r1)
                ret = serdes_7322_init_old(ppd);
        else
                ret = serdes_7322_init_new(ppd);
        return ret;
}

static int serdes_7322_init_old(struct qib_pportdata *ppd)
{
        u32 le_val;

        /*
         * Initialize the Tx DDS tables.  Also done every QSFP event,
         * for adapters with QSFP
         */
        init_txdds_table(ppd, 0);

        /* ensure no tx overrides from earlier driver loads */
        qib_write_kreg_port(ppd, krp_tx_deemph_override,
                SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                reset_tx_deemphasis_override));

        /* Patch some SerDes defaults to "Better for IB" */
        /* Timing Loop Bandwidth: cdr_timing[11:9] = 0 */
        ibsd_wr_allchans(ppd, 2, 0, BMASK(11, 9));

        /* Termination: rxtermctrl_r2d addr 11 bits [12:11] = 1 */
        ibsd_wr_allchans(ppd, 11, (1 << 11), BMASK(12, 11));
        /* Enable LE2: rxle2en_r2a addr 13 bit [6] = 1 */
        ibsd_wr_allchans(ppd, 13, (1 << 6), (1 << 6));

        /* May be overridden in qsfp_7322_event */
        le_val = IS_QME(ppd->dd) ? LE2_QME : LE2_DEFAULT;
        ibsd_wr_allchans(ppd, 13, (le_val << 7), BMASK(9, 7));

        /* enable LE1 adaptation for all but QME, which is disabled */
        le_val = IS_QME(ppd->dd) ? 0 : 1;
        ibsd_wr_allchans(ppd, 13, (le_val << 5), (1 << 5));

        /* Clear cmode-override, may be set from older driver */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 10, 0 << 14, 1 << 14);

        /* Timing Recovery: rxtapsel addr 5 bits [9:8] = 0 */
        ibsd_wr_allchans(ppd, 5, (0 << 8), BMASK(9, 8));

        /* setup LoS params; these are subsystem, so chan == 5 */
        /* LoS filter threshold_count on, ch 0-3, set to 8 */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 5, 8 << 11, BMASK(14, 11));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 7, 8 << 4, BMASK(7, 4));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 8, 8 << 11, BMASK(14, 11));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 10, 8 << 4, BMASK(7, 4));

        /* LoS filter threshold_count off, ch 0-3, set to 4 */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 6, 4 << 0, BMASK(3, 0));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 7, 4 << 8, BMASK(11, 8));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 9, 4 << 0, BMASK(3, 0));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 10, 4 << 8, BMASK(11, 8));

        /* LoS filter select enabled */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 9, 1 << 15, 1 << 15);

        /* LoS target data:  SDR=4, DDR=2, QDR=1 */
        ibsd_wr_allchans(ppd, 14, (1 << 3), BMASK(5, 3)); /* QDR */
        ibsd_wr_allchans(ppd, 20, (2 << 10), BMASK(12, 10)); /* DDR */
        ibsd_wr_allchans(ppd, 20, (4 << 13), BMASK(15, 13)); /* SDR */

        serdes_7322_los_enable(ppd, 1);

        /* rxbistena; set 0 to avoid effects of it switch later */
        ibsd_wr_allchans(ppd, 9, 0 << 15, 1 << 15);

        /* Configure 4 DFE taps, and only they adapt */
        ibsd_wr_allchans(ppd, 16, 0 << 0, BMASK(1, 0));

        /* gain hi stop 32 (22) (6:1) lo stop 7 (10:7) target 22 (13) (15:11) */
        le_val = (ppd->dd->cspec->r1 || IS_QME(ppd->dd)) ? 0xb6c0 : 0x6bac;
        ibsd_wr_allchans(ppd, 21, le_val, 0xfffe);

        /*
         * Set receive adaptation mode.  SDR and DDR adaptation are
         * always on, and QDR is initially enabled; later disabled.
         */
        qib_write_kreg_port(ppd, krp_static_adapt_dis(0), 0ULL);
        qib_write_kreg_port(ppd, krp_static_adapt_dis(1), 0ULL);
        qib_write_kreg_port(ppd, krp_static_adapt_dis(2),
                            ppd->dd->cspec->r1 ?
                            QDR_STATIC_ADAPT_DOWN_R1 : QDR_STATIC_ADAPT_DOWN);
        ppd->cpspec->qdr_dfe_on = 1;

        /* FLoop LOS gate: PPM filter  enabled */
        ibsd_wr_allchans(ppd, 38, 0 << 10, 1 << 10);

        /* rx offset center enabled */
        ibsd_wr_allchans(ppd, 12, 1 << 4, 1 << 4);

        if (!ppd->dd->cspec->r1) {
                ibsd_wr_allchans(ppd, 12, 1 << 12, 1 << 12);
                ibsd_wr_allchans(ppd, 12, 2 << 8, 0x0f << 8);
        }

        /* Set the frequency loop bandwidth to 15 */
        ibsd_wr_allchans(ppd, 2, 15 << 5, BMASK(8, 5));

        return 0;
}

static int serdes_7322_init_new(struct qib_pportdata *ppd)
{
        u64 tstart;
        u32 le_val, rxcaldone;
        int chan, chan_done = (1 << SERDES_CHANS) - 1;

        /*
         * Initialize the Tx DDS tables.  Also done every QSFP event,
         * for adapters with QSFP
         */
        init_txdds_table(ppd, 0);

        /* Clear cmode-override, may be set from older driver */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 10, 0 << 14, 1 << 14);

        /* ensure no tx overrides from earlier driver loads */
        qib_write_kreg_port(ppd, krp_tx_deemph_override,
                SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                reset_tx_deemphasis_override));

        /* START OF LSI SUGGESTED SERDES BRINGUP */
        /* Reset - Calibration Setup */
        /*       Stop DFE adaptaion */
        ibsd_wr_allchans(ppd, 1, 0, BMASK(9, 1));
        /*       Disable LE1 */
        ibsd_wr_allchans(ppd, 13, 0, BMASK(5, 5));
        /*       Disable autoadapt for LE1 */
        ibsd_wr_allchans(ppd, 1, 0, BMASK(15, 15));
        /*       Disable LE2 */
        ibsd_wr_allchans(ppd, 13, 0, BMASK(6, 6));
        /*       Disable VGA */
        ibsd_wr_allchans(ppd, 5, 0, BMASK(0, 0));
        /*       Disable AFE Offset Cancel */
        ibsd_wr_allchans(ppd, 12, 0, BMASK(12, 12));
        /*       Disable Timing Loop */
        ibsd_wr_allchans(ppd, 2, 0, BMASK(3, 3));
        /*       Disable Frequency Loop */
        ibsd_wr_allchans(ppd, 2, 0, BMASK(4, 4));
        /*       Disable Baseline Wander Correction */
        ibsd_wr_allchans(ppd, 13, 0, BMASK(13, 13));
        /*       Disable RX Calibration */
        ibsd_wr_allchans(ppd, 4, 0, BMASK(10, 10));
        /*       Disable RX Offset Calibration */
        ibsd_wr_allchans(ppd, 12, 0, BMASK(4, 4));
        /*       Select BB CDR */
        ibsd_wr_allchans(ppd, 2, (1 << 15), BMASK(15, 15));
        /*       CDR Step Size */
        ibsd_wr_allchans(ppd, 5, 0, BMASK(9, 8));
        /*       Enable phase Calibration */
        ibsd_wr_allchans(ppd, 12, (1 << 5), BMASK(5, 5));
        /*       DFE Bandwidth [2:14-12] */
        ibsd_wr_allchans(ppd, 2, (4 << 12), BMASK(14, 12));
        /*       DFE Config (4 taps only) */
        ibsd_wr_allchans(ppd, 16, 0, BMASK(1, 0));
        /*       Gain Loop Bandwidth */
        if (!ppd->dd->cspec->r1) {
                ibsd_wr_allchans(ppd, 12, 1 << 12, BMASK(12, 12));
                ibsd_wr_allchans(ppd, 12, 2 << 8, BMASK(11, 8));
        } else {
                ibsd_wr_allchans(ppd, 19, (3 << 11), BMASK(13, 11));
        }
        /*       Baseline Wander Correction Gain [13:4-0] (leave as default) */
        /*       Baseline Wander Correction Gain [3:7-5] (leave as default) */
        /*       Data Rate Select [5:7-6] (leave as default) */
        /*       RX Parallel Word Width [3:10-8] (leave as default) */

        /* RX REST */
        /*       Single- or Multi-channel reset */
        /*       RX Analog reset */
        /*       RX Digital reset */
        ibsd_wr_allchans(ppd, 0, 0, BMASK(15, 13));
        msleep(20);
        /*       RX Analog reset */
        ibsd_wr_allchans(ppd, 0, (1 << 14), BMASK(14, 14));
        msleep(20);
        /*       RX Digital reset */
        ibsd_wr_allchans(ppd, 0, (1 << 13), BMASK(13, 13));
        msleep(20);

        /* setup LoS params; these are subsystem, so chan == 5 */
        /* LoS filter threshold_count on, ch 0-3, set to 8 */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 5, 8 << 11, BMASK(14, 11));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 7, 8 << 4, BMASK(7, 4));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 8, 8 << 11, BMASK(14, 11));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 10, 8 << 4, BMASK(7, 4));

        /* LoS filter threshold_count off, ch 0-3, set to 4 */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 6, 4 << 0, BMASK(3, 0));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 7, 4 << 8, BMASK(11, 8));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 9, 4 << 0, BMASK(3, 0));
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 10, 4 << 8, BMASK(11, 8));

        /* LoS filter select enabled */
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), 5, 9, 1 << 15, 1 << 15);

        /* LoS target data:  SDR=4, DDR=2, QDR=1 */
        ibsd_wr_allchans(ppd, 14, (1 << 3), BMASK(5, 3)); /* QDR */
        ibsd_wr_allchans(ppd, 20, (2 << 10), BMASK(12, 10)); /* DDR */
        ibsd_wr_allchans(ppd, 20, (4 << 13), BMASK(15, 13)); /* SDR */

        /* Turn on LOS on initial SERDES init */
        serdes_7322_los_enable(ppd, 1);
        /* FLoop LOS gate: PPM filter  enabled */
        ibsd_wr_allchans(ppd, 38, 0 << 10, 1 << 10);

        /* RX LATCH CALIBRATION */
        /*       Enable Eyefinder Phase Calibration latch */
        ibsd_wr_allchans(ppd, 15, 1, BMASK(0, 0));
        /*       Enable RX Offset Calibration latch */
        ibsd_wr_allchans(ppd, 12, (1 << 4), BMASK(4, 4));
        msleep(20);
        /*       Start Calibration */
        ibsd_wr_allchans(ppd, 4, (1 << 10), BMASK(10, 10));
        tstart = get_jiffies_64();
        while (chan_done &&
               !time_after64(get_jiffies_64(),
                        tstart + msecs_to_jiffies(500))) {
                msleep(20);
                for (chan = 0; chan < SERDES_CHANS; ++chan) {
                        rxcaldone = ahb_mod(ppd->dd, IBSD(ppd->hw_pidx),
                                            (chan + (chan >> 1)),
                                            25, 0, 0);
                        if ((~rxcaldone & (u32)BMASK(9, 9)) == 0 &&
                            (~chan_done & (1 << chan)) == 0)
                                chan_done &= ~(1 << chan);
                }
        }
        if (chan_done) {
                printk(KERN_INFO QIB_DRV_NAME
                         " Serdes %d calibration not done after .5 sec: 0x%x\n",
                         IBSD(ppd->hw_pidx), chan_done);
        } else {
                for (chan = 0; chan < SERDES_CHANS; ++chan) {
                        rxcaldone = ahb_mod(ppd->dd, IBSD(ppd->hw_pidx),
                                            (chan + (chan >> 1)),
                                            25, 0, 0);
                        if ((~rxcaldone & (u32)BMASK(10, 10)) == 0)
                                printk(KERN_INFO QIB_DRV_NAME
                                         " Serdes %d chan %d calibration "
                                         "failed\n", IBSD(ppd->hw_pidx), chan);
                }
        }

        /*       Turn off Calibration */
        ibsd_wr_allchans(ppd, 4, 0, BMASK(10, 10));
        msleep(20);

        /* BRING RX UP */
        /*       Set LE2 value (May be overridden in qsfp_7322_event) */
        le_val = IS_QME(ppd->dd) ? LE2_QME : LE2_DEFAULT;
        ibsd_wr_allchans(ppd, 13, (le_val << 7), BMASK(9, 7));
        /*       Set LE2 Loop bandwidth */
        ibsd_wr_allchans(ppd, 3, (7 << 5), BMASK(7, 5));
        /*       Enable LE2 */
        ibsd_wr_allchans(ppd, 13, (1 << 6), BMASK(6, 6));
        msleep(20);
        /*       Enable H0 only */
        ibsd_wr_allchans(ppd, 1, 1, BMASK(9, 1));
        /* gain hi stop 32 (22) (6:1) lo stop 7 (10:7) target 22 (13) (15:11) */
        le_val = (ppd->dd->cspec->r1 || IS_QME(ppd->dd)) ? 0xb6c0 : 0x6bac;
        ibsd_wr_allchans(ppd, 21, le_val, 0xfffe);
        /*       Enable VGA */
        ibsd_wr_allchans(ppd, 5, 0, BMASK(0, 0));
        msleep(20);
        /*       Set Frequency Loop Bandwidth */
        ibsd_wr_allchans(ppd, 2, (7 << 5), BMASK(8, 5));
        /*       Enable Frequency Loop */
        ibsd_wr_allchans(ppd, 2, (1 << 4), BMASK(4, 4));
        /*       Set Timing Loop Bandwidth */
        ibsd_wr_allchans(ppd, 2, 0, BMASK(11, 9));
        /*       Enable Timing Loop */
        ibsd_wr_allchans(ppd, 2, (1 << 3), BMASK(3, 3));
        msleep(50);
        /*       Enable DFE
         *       Set receive adaptation mode.  SDR and DDR adaptation are
         *       always on, and QDR is initially enabled; later disabled.
         */
        qib_write_kreg_port(ppd, krp_static_adapt_dis(0), 0ULL);
        qib_write_kreg_port(ppd, krp_static_adapt_dis(1), 0ULL);
        qib_write_kreg_port(ppd, krp_static_adapt_dis(2),
                            ppd->dd->cspec->r1 ?
                            QDR_STATIC_ADAPT_DOWN_R1 : QDR_STATIC_ADAPT_DOWN);
        ppd->cpspec->qdr_dfe_on = 1;
        /*       Disable LE1  */
        ibsd_wr_allchans(ppd, 13, (0 << 5), (1 << 5));
        /*       Disable auto adapt for LE1 */
        ibsd_wr_allchans(ppd, 1, (0 << 15), BMASK(15, 15));
        msleep(20);
        /*       Enable AFE Offset Cancel */
        ibsd_wr_allchans(ppd, 12, (1 << 12), BMASK(12, 12));
        /*       Enable Baseline Wander Correction */
        ibsd_wr_allchans(ppd, 12, (1 << 13), BMASK(13, 13));
        /* Termination: rxtermctrl_r2d addr 11 bits [12:11] = 1 */
        ibsd_wr_allchans(ppd, 11, (1 << 11), BMASK(12, 11));
        /* VGA output common mode */
        ibsd_wr_allchans(ppd, 12, (3 << 2), BMASK(3, 2));

        return 0;
}

/* start adjust QMH serdes parameters */

static void set_man_code(struct qib_pportdata *ppd, int chan, int code)
{
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                9, code << 9, 0x3f << 9);
}

static void set_man_mode_h1(struct qib_pportdata *ppd, int chan,
        int enable, u32 tapenable)
{
        if (enable)
                ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                        1, 3 << 10, 0x1f << 10);
        else
                ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                        1, 0, 0x1f << 10);
}

/* Set clock to 1, 0, 1, 0 */
static void clock_man(struct qib_pportdata *ppd, int chan)
{
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                4, 0x4000, 0x4000);
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                4, 0, 0x4000);
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                4, 0x4000, 0x4000);
        ahb_mod(ppd->dd, IBSD(ppd->hw_pidx), (chan + (chan >> 1)),
                4, 0, 0x4000);
}

/*
 * write the current Tx serdes pre,post,main,amp settings into the serdes.
 * The caller must pass the settings appropriate for the current speed,
 * or not care if they are correct for the current speed.
 */
static void write_tx_serdes_param(struct qib_pportdata *ppd,
                                  struct txdds_ent *txdds)
{
        u64 deemph;

        deemph = qib_read_kreg_port(ppd, krp_tx_deemph_override);
        /* field names for amp, main, post, pre, respectively */
        deemph &= ~(SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txampcntl_d2a) |
                    SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txc0_ena) |
                    SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txcp1_ena) |
                    SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txcn1_ena));

        deemph |= SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                           tx_override_deemphasis_select);
        deemph |= (txdds->amp & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                    txampcntl_d2a)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                                       txampcntl_d2a);
        deemph |= (txdds->main & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                     txc0_ena)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                                   txc0_ena);
        deemph |= (txdds->post & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                     txcp1_ena)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                                    txcp1_ena);
        deemph |= (txdds->pre & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                     txcn1_ena)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
                                    txcn1_ena);
        qib_write_kreg_port(ppd, krp_tx_deemph_override, deemph);
}

/*
 * Set the parameters for mez cards on link bounce, so they are
 * always exactly what was requested.  Similar logic to init_txdds
 * but does just the serdes.
 */
static void adj_tx_serdes(struct qib_pportdata *ppd)
{
        const struct txdds_ent *sdr_dds, *ddr_dds, *qdr_dds;
        struct txdds_ent *dds;

        find_best_ent(ppd, &sdr_dds, &ddr_dds, &qdr_dds, 1);
        dds = (struct txdds_ent *)(ppd->link_speed_active == QIB_IB_QDR ?
                qdr_dds : (ppd->link_speed_active == QIB_IB_DDR ?
                                ddr_dds : sdr_dds));
        write_tx_serdes_param(ppd, dds);
}

/* set QDR forced value for H1, if needed */
static void force_h1(struct qib_pportdata *ppd)
{
        int chan;

        ppd->cpspec->qdr_reforce = 0;
        if (!ppd->dd->cspec->r1)
                return;

        for (chan = 0; chan < SERDES_CHANS; chan++) {
                set_man_mode_h1(ppd, chan, 1, 0);
                set_man_code(ppd, chan, ppd->cpspec->h1_val);
                clock_man(ppd, chan);
                set_man_mode_h1(ppd, chan, 0, 0);
        }
}

#define SJA_EN SYM_MASK(SPC_JTAG_ACCESS_REG, SPC_JTAG_ACCESS_EN)
#define BISTEN_LSB SYM_LSB(SPC_JTAG_ACCESS_REG, bist_en)

#define R_OPCODE_LSB 3
#define R_OP_NOP 0
#define R_OP_SHIFT 2
#define R_OP_UPDATE 3
#define R_TDI_LSB 2
#define R_TDO_LSB 1
#define R_RDY 1

static int qib_r_grab(struct qib_devdata *dd)
{
        u64 val;
        val = SJA_EN;
        qib_write_kreg(dd, kr_r_access, val);
        qib_read_kreg32(dd, kr_scratch);
        return 0;
}

/* qib_r_wait_for_rdy() not only waits for the ready bit, it
 * returns the current state of R_TDO
 */
static int qib_r_wait_for_rdy(struct qib_devdata *dd)
{
        u64 val;
        int timeout;
        for (timeout = 0; timeout < 100 ; ++timeout) {
                val = qib_read_kreg32(dd, kr_r_access);
                if (val & R_RDY)
                        return (val >> R_TDO_LSB) & 1;
        }
        return -1;
}

static int qib_r_shift(struct qib_devdata *dd, int bisten,
                       int len, u8 *inp, u8 *outp)
{
        u64 valbase, val;
        int ret, pos;

        valbase = SJA_EN | (bisten << BISTEN_LSB) |
                (R_OP_SHIFT << R_OPCODE_LSB);
        ret = qib_r_wait_for_rdy(dd);
        if (ret < 0)
                goto bail;
        for (pos = 0; pos < len; ++pos) {
                val = valbase;
                if (outp) {
                        outp[pos >> 3] &= ~(1 << (pos & 7));
                        outp[pos >> 3] |= (ret << (pos & 7));
                }
                if (inp) {
                        int tdi = inp[pos >> 3] >> (pos & 7);
                        val |= ((tdi & 1) << R_TDI_LSB);
                }
                qib_write_kreg(dd, kr_r_access, val);
                qib_read_kreg32(dd, kr_scratch);
                ret = qib_r_wait_for_rdy(dd);
                if (ret < 0)
                        break;
        }
        /* Restore to NOP between operations. */
        val =  SJA_EN | (bisten << BISTEN_LSB);
        qib_write_kreg(dd, kr_r_access, val);
        qib_read_kreg32(dd, kr_scratch);
        ret = qib_r_wait_for_rdy(dd);

        if (ret >= 0)
                ret = pos;
bail:
        return ret;
}

static int qib_r_update(struct qib_devdata *dd, int bisten)
{
        u64 val;
        int ret;

        val = SJA_EN | (bisten << BISTEN_LSB) | (R_OP_UPDATE << R_OPCODE_LSB);
        ret = qib_r_wait_for_rdy(dd);
        if (ret >= 0) {
                qib_write_kreg(dd, kr_r_access, val);
                qib_read_kreg32(dd, kr_scratch);
        }
        return ret;
}

#define BISTEN_PORT_SEL 15
#define LEN_PORT_SEL 625
#define BISTEN_AT 17
#define LEN_AT 156
#define BISTEN_ETM 16
#define LEN_ETM 632

#define BIT2BYTE(x) (((x) +  BITS_PER_BYTE - 1) / BITS_PER_BYTE)

/* these are common for all IB port use cases. */
static u8 reset_at[BIT2BYTE(LEN_AT)] = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00,
};
static u8 reset_atetm[BIT2BYTE(LEN_ETM)] = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x80, 0xe3, 0x81, 0x73, 0x3c, 0x70, 0x8e,
        0x07, 0xce, 0xf1, 0xc0, 0x39, 0x1e, 0x38, 0xc7, 0x03, 0xe7,
        0x78, 0xe0, 0x1c, 0x0f, 0x9c, 0x7f, 0x80, 0x73, 0x0f, 0x70,
        0xde, 0x01, 0xce, 0x39, 0xc0, 0xf9, 0x06, 0x38, 0xd7, 0x00,
        0xe7, 0x19, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
};
static u8 at[BIT2BYTE(LEN_AT)] = {
        0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00,
};

/* used for IB1 or IB2, only one in use */
static u8 atetm_1port[BIT2BYTE(LEN_ETM)] = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x10, 0xf2, 0x80, 0x83, 0x1e, 0x38, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x50, 0xf4, 0x41, 0x00, 0x18, 0x78, 0xc8, 0x03,
        0x07, 0x7b, 0xa0, 0x3e, 0x00, 0x02, 0x00, 0x00, 0x18, 0x00,
        0x18, 0x00, 0x00, 0x00, 0x00, 0x4b, 0x00, 0x00, 0x00,
};

/* used when both IB1 and IB2 are in use */
static u8 atetm_2port[BIT2BYTE(LEN_ETM)] = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79,
        0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0xf8, 0x80, 0x83, 0x1e, 0x38, 0xe0, 0x03, 0x05,
        0x7b, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
        0xa2, 0x0f, 0x50, 0xf4, 0x41, 0x00, 0x18, 0x78, 0xd1, 0x07,
        0x02, 0x7c, 0x80, 0x3e, 0x00, 0x02, 0x00, 0x00, 0x3e, 0x00,
        0x02, 0x00, 0x00, 0x00, 0x00, 0x64, 0x00, 0x00, 0x00,
};

/* used when only IB1 is in use */
static u8 portsel_port1[BIT2BYTE(LEN_PORT_SEL)] = {
        0x32, 0x65, 0xa4, 0x7b, 0x10, 0x98, 0xdc, 0xfe, 0x13, 0x13,
        0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x73, 0x0c, 0x0c, 0x0c,
        0x0c, 0x0c, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13,
        0x13, 0x78, 0x78, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13,
        0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x74, 0x32,
        0x32, 0x32, 0x32, 0x32, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
        0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
        0x14, 0x14, 0x9f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
};

/* used when only IB2 is in use */
static u8 portsel_port2[BIT2BYTE(LEN_PORT_SEL)] = {
        0x32, 0x65, 0xa4, 0x7b, 0x10, 0x98, 0xdc, 0xfe, 0x39, 0x39,
        0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x73, 0x32, 0x32, 0x32,
        0x32, 0x32, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39,
        0x39, 0x78, 0x78, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39,
        0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x74, 0x32,
        0x32, 0x32, 0x32, 0x32, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a,
        0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a, 0x3a,
        0x3a, 0x3a, 0x9f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01,
};

/* used when both IB1 and IB2 are in use */
static u8 portsel_2port[BIT2BYTE(LEN_PORT_SEL)] = {
        0x32, 0xba, 0x54, 0x76, 0x10, 0x98, 0xdc, 0xfe, 0x13, 0x13,
        0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x73, 0x0c, 0x0c, 0x0c,
        0x0c, 0x0c, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13,
        0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13,
        0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x74, 0x32,
        0x32, 0x32, 0x32, 0x32, 0x14, 0x14, 0x14, 0x14, 0x14, 0x3a,
        0x3a, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14,
        0x14, 0x14, 0x9f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
};

/*
 * Do setup to properly handle IB link recovery; if port is zero, we
 * are initializing to cover both ports; otherwise we are initializing
 * to cover a single port card, or the port has reached INIT and we may
 * need to switch coverage types.
 */
static void setup_7322_link_recovery(struct qib_pportdata *ppd, u32 both)
{
        u8 *portsel, *etm;
        struct qib_devdata *dd = ppd->dd;

        if (!ppd->dd->cspec->r1)
                return;
        if (!both) {
                dd->cspec->recovery_ports_initted++;
                ppd->cpspec->recovery_init = 1;
        }
        if (!both && dd->cspec->recovery_ports_initted == 1) {
                portsel = ppd->port == 1 ? portsel_port1 : portsel_port2;
                etm = atetm_1port;
        } else {
                portsel = portsel_2port;
                etm = atetm_2port;
        }

        if (qib_r_grab(dd) < 0 ||
                qib_r_shift(dd, BISTEN_ETM, LEN_ETM, reset_atetm, NULL) < 0 ||
                qib_r_update(dd, BISTEN_ETM) < 0 ||
                qib_r_shift(dd, BISTEN_AT, LEN_AT, reset_at, NULL) < 0 ||
                qib_r_update(dd, BISTEN_AT) < 0 ||
                qib_r_shift(dd, BISTEN_PORT_SEL, LEN_PORT_SEL,
                            portsel, NULL) < 0 ||
                qib_r_update(dd, BISTEN_PORT_SEL) < 0 ||
                qib_r_shift(dd, BISTEN_AT, LEN_AT, at, NULL) < 0 ||
                qib_r_update(dd, BISTEN_AT) < 0 ||
                qib_r_shift(dd, BISTEN_ETM, LEN_ETM, etm, NULL) < 0 ||
                qib_r_update(dd, BISTEN_ETM) < 0)
                qib_dev_err(dd, "Failed IB link recovery setup\n");
}

static void check_7322_rxe_status(struct qib_pportdata *ppd)
{
        struct qib_devdata *dd = ppd->dd;
        u64 fmask;

        if (dd->cspec->recovery_ports_initted != 1)
                return; /* rest doesn't apply to dualport */
        qib_write_kreg(dd, kr_control, dd->control |
                       SYM_MASK(Control, FreezeMode));
        (void)qib_read_kreg64(dd, kr_scratch);
        udelay(3); /* ibcreset asserted 400ns, be sure that's over */
        fmask = qib_read_kreg64(dd, kr_act_fmask);
        if (!fmask) {
                /*
                 * require a powercycle before we'll work again, and make
                 * sure we get no more interrupts, and don't turn off
                 * freeze.
                 */
                ppd->dd->cspec->stay_in_freeze = 1;
                qib_7322_set_intr_state(ppd->dd, 0);
                qib_write_kreg(dd, kr_fmask, 0ULL);
                qib_dev_err(dd, "HCA unusable until powercycled\n");
                return; /* eventually reset */
        }

        qib_write_kreg(ppd->dd, kr_hwerrclear,
            SYM_MASK(HwErrClear, IBSerdesPClkNotDetectClear_1));

        /* don't do the full clear_freeze(), not needed for this */
        qib_write_kreg(dd, kr_control, dd->control);
        qib_read_kreg32(dd, kr_scratch);
        /* take IBC out of reset */
        if (ppd->link_speed_supported) {
                ppd->cpspec->ibcctrl_a &=
                        ~SYM_MASK(IBCCtrlA_0, IBStatIntReductionEn);
                qib_write_kreg_port(ppd, krp_ibcctrl_a,
                                    ppd->cpspec->ibcctrl_a);
                qib_read_kreg32(dd, kr_scratch);
                if (ppd->lflags & QIBL_IB_LINK_DISABLED)
                        qib_set_ib_7322_lstate(ppd, 0,
                                QLOGIC_IB_IBCC_LINKINITCMD_DISABLE);
        }
}