root/drivers/scsi/qla2xxx/qla_nx.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2014 QLogic Corporation
 */
#include "qla_def.h"
#include <linux/delay.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/pci.h>
#include <linux/ratelimit.h>
#include <linux/vmalloc.h>
#include <scsi/scsi_tcq.h>

#define MASK(n)                 ((1ULL<<(n))-1)
#define MN_WIN(addr) (((addr & 0x1fc0000) >> 1) | \
        ((addr >> 25) & 0x3ff))
#define OCM_WIN(addr) (((addr & 0x1ff0000) >> 1) | \
        ((addr >> 25) & 0x3ff))
#define MS_WIN(addr) (addr & 0x0ffc0000)
#define QLA82XX_PCI_MN_2M   (0)
#define QLA82XX_PCI_MS_2M   (0x80000)
#define QLA82XX_PCI_OCM0_2M (0xc0000)
#define VALID_OCM_ADDR(addr) (((addr) & 0x3f800) != 0x3f800)
#define GET_MEM_OFFS_2M(addr) (addr & MASK(18))
#define BLOCK_PROTECT_BITS 0x0F

/* CRB window related */
#define CRB_BLK(off)    ((off >> 20) & 0x3f)
#define CRB_SUBBLK(off) ((off >> 16) & 0xf)
#define CRB_WINDOW_2M   (0x130060)
#define QLA82XX_PCI_CAMQM_2M_END        (0x04800800UL)
#define CRB_HI(off)     ((qla82xx_crb_hub_agt[CRB_BLK(off)] << 20) | \
                        ((off) & 0xf0000))
#define QLA82XX_PCI_CAMQM_2M_BASE       (0x000ff800UL)
#define CRB_INDIRECT_2M (0x1e0000UL)

#define MAX_CRB_XFORM 60
static unsigned long crb_addr_xform[MAX_CRB_XFORM];
static int qla82xx_crb_table_initialized;

#define qla82xx_crb_addr_transform(name) \
        (crb_addr_xform[QLA82XX_HW_PX_MAP_CRB_##name] = \
        QLA82XX_HW_CRB_HUB_AGT_ADR_##name << 20)

const int MD_MIU_TEST_AGT_RDDATA[] = {
        0x410000A8, 0x410000AC,
        0x410000B8, 0x410000BC
};

static void qla82xx_crb_addr_transform_setup(void)
{
        qla82xx_crb_addr_transform(XDMA);
        qla82xx_crb_addr_transform(TIMR);
        qla82xx_crb_addr_transform(SRE);
        qla82xx_crb_addr_transform(SQN3);
        qla82xx_crb_addr_transform(SQN2);
        qla82xx_crb_addr_transform(SQN1);
        qla82xx_crb_addr_transform(SQN0);
        qla82xx_crb_addr_transform(SQS3);
        qla82xx_crb_addr_transform(SQS2);
        qla82xx_crb_addr_transform(SQS1);
        qla82xx_crb_addr_transform(SQS0);
        qla82xx_crb_addr_transform(RPMX7);
        qla82xx_crb_addr_transform(RPMX6);
        qla82xx_crb_addr_transform(RPMX5);
        qla82xx_crb_addr_transform(RPMX4);
        qla82xx_crb_addr_transform(RPMX3);
        qla82xx_crb_addr_transform(RPMX2);
        qla82xx_crb_addr_transform(RPMX1);
        qla82xx_crb_addr_transform(RPMX0);
        qla82xx_crb_addr_transform(ROMUSB);
        qla82xx_crb_addr_transform(SN);
        qla82xx_crb_addr_transform(QMN);
        qla82xx_crb_addr_transform(QMS);
        qla82xx_crb_addr_transform(PGNI);
        qla82xx_crb_addr_transform(PGND);
        qla82xx_crb_addr_transform(PGN3);
        qla82xx_crb_addr_transform(PGN2);
        qla82xx_crb_addr_transform(PGN1);
        qla82xx_crb_addr_transform(PGN0);
        qla82xx_crb_addr_transform(PGSI);
        qla82xx_crb_addr_transform(PGSD);
        qla82xx_crb_addr_transform(PGS3);
        qla82xx_crb_addr_transform(PGS2);
        qla82xx_crb_addr_transform(PGS1);
        qla82xx_crb_addr_transform(PGS0);
        qla82xx_crb_addr_transform(PS);
        qla82xx_crb_addr_transform(PH);
        qla82xx_crb_addr_transform(NIU);
        qla82xx_crb_addr_transform(I2Q);
        qla82xx_crb_addr_transform(EG);
        qla82xx_crb_addr_transform(MN);
        qla82xx_crb_addr_transform(MS);
        qla82xx_crb_addr_transform(CAS2);
        qla82xx_crb_addr_transform(CAS1);
        qla82xx_crb_addr_transform(CAS0);
        qla82xx_crb_addr_transform(CAM);
        qla82xx_crb_addr_transform(C2C1);
        qla82xx_crb_addr_transform(C2C0);
        qla82xx_crb_addr_transform(SMB);
        qla82xx_crb_addr_transform(OCM0);
        /*
         * Used only in P3 just define it for P2 also.
         */
        qla82xx_crb_addr_transform(I2C0);

        qla82xx_crb_table_initialized = 1;
}

static struct crb_128M_2M_block_map crb_128M_2M_map[64] = {
        {{{0, 0,         0,         0} } },
        {{{1, 0x0100000, 0x0102000, 0x120000},
        {1, 0x0110000, 0x0120000, 0x130000},
        {1, 0x0120000, 0x0122000, 0x124000},
        {1, 0x0130000, 0x0132000, 0x126000},
        {1, 0x0140000, 0x0142000, 0x128000},
        {1, 0x0150000, 0x0152000, 0x12a000},
        {1, 0x0160000, 0x0170000, 0x110000},
        {1, 0x0170000, 0x0172000, 0x12e000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {1, 0x01e0000, 0x01e0800, 0x122000},
        {0, 0x0000000, 0x0000000, 0x000000} } } ,
        {{{1, 0x0200000, 0x0210000, 0x180000} } },
        {{{0, 0,         0,         0} } },
        {{{1, 0x0400000, 0x0401000, 0x169000} } },
        {{{1, 0x0500000, 0x0510000, 0x140000} } },
        {{{1, 0x0600000, 0x0610000, 0x1c0000} } },
        {{{1, 0x0700000, 0x0704000, 0x1b8000} } },
        {{{1, 0x0800000, 0x0802000, 0x170000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {1, 0x08f0000, 0x08f2000, 0x172000} } },
        {{{1, 0x0900000, 0x0902000, 0x174000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {1, 0x09f0000, 0x09f2000, 0x176000} } },
        {{{0, 0x0a00000, 0x0a02000, 0x178000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {1, 0x0af0000, 0x0af2000, 0x17a000} } },
        {{{0, 0x0b00000, 0x0b02000, 0x17c000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {1, 0x0bf0000, 0x0bf2000, 0x17e000} } },
        {{{1, 0x0c00000, 0x0c04000, 0x1d4000} } },
        {{{1, 0x0d00000, 0x0d04000, 0x1a4000} } },
        {{{1, 0x0e00000, 0x0e04000, 0x1a0000} } },
        {{{1, 0x0f00000, 0x0f01000, 0x164000} } },
        {{{0, 0x1000000, 0x1004000, 0x1a8000} } },
        {{{1, 0x1100000, 0x1101000, 0x160000} } },
        {{{1, 0x1200000, 0x1201000, 0x161000} } },
        {{{1, 0x1300000, 0x1301000, 0x162000} } },
        {{{1, 0x1400000, 0x1401000, 0x163000} } },
        {{{1, 0x1500000, 0x1501000, 0x165000} } },
        {{{1, 0x1600000, 0x1601000, 0x166000} } },
        {{{0, 0,         0,         0} } },
        {{{0, 0,         0,         0} } },
        {{{0, 0,         0,         0} } },
        {{{0, 0,         0,         0} } },
        {{{0, 0,         0,         0} } },
        {{{0, 0,         0,         0} } },
        {{{1, 0x1d00000, 0x1d10000, 0x190000} } },
        {{{1, 0x1e00000, 0x1e01000, 0x16a000} } },
        {{{1, 0x1f00000, 0x1f10000, 0x150000} } },
        {{{0} } },
        {{{1, 0x2100000, 0x2102000, 0x120000},
        {1, 0x2110000, 0x2120000, 0x130000},
        {1, 0x2120000, 0x2122000, 0x124000},
        {1, 0x2130000, 0x2132000, 0x126000},
        {1, 0x2140000, 0x2142000, 0x128000},
        {1, 0x2150000, 0x2152000, 0x12a000},
        {1, 0x2160000, 0x2170000, 0x110000},
        {1, 0x2170000, 0x2172000, 0x12e000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000},
        {0, 0x0000000, 0x0000000, 0x000000} } },
        {{{1, 0x2200000, 0x2204000, 0x1b0000} } },
        {{{0} } },
        {{{0} } },
        {{{0} } },
        {{{0} } },
        {{{0} } },
        {{{1, 0x2800000, 0x2804000, 0x1a4000} } },
        {{{1, 0x2900000, 0x2901000, 0x16b000} } },
        {{{1, 0x2a00000, 0x2a00400, 0x1ac400} } },
        {{{1, 0x2b00000, 0x2b00400, 0x1ac800} } },
        {{{1, 0x2c00000, 0x2c00400, 0x1acc00} } },
        {{{1, 0x2d00000, 0x2d00400, 0x1ad000} } },
        {{{1, 0x2e00000, 0x2e00400, 0x1ad400} } },
        {{{1, 0x2f00000, 0x2f00400, 0x1ad800} } },
        {{{1, 0x3000000, 0x3000400, 0x1adc00} } },
        {{{0, 0x3100000, 0x3104000, 0x1a8000} } },
        {{{1, 0x3200000, 0x3204000, 0x1d4000} } },
        {{{1, 0x3300000, 0x3304000, 0x1a0000} } },
        {{{0} } },
        {{{1, 0x3500000, 0x3500400, 0x1ac000} } },
        {{{1, 0x3600000, 0x3600400, 0x1ae000} } },
        {{{1, 0x3700000, 0x3700400, 0x1ae400} } },
        {{{1, 0x3800000, 0x3804000, 0x1d0000} } },
        {{{1, 0x3900000, 0x3904000, 0x1b4000} } },
        {{{1, 0x3a00000, 0x3a04000, 0x1d8000} } },
        {{{0} } },
        {{{0} } },
        {{{1, 0x3d00000, 0x3d04000, 0x1dc000} } },
        {{{1, 0x3e00000, 0x3e01000, 0x167000} } },
        {{{1, 0x3f00000, 0x3f01000, 0x168000} } }
};

/*
 * top 12 bits of crb internal address (hub, agent)
 */
static unsigned qla82xx_crb_hub_agt[64] = {
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PS,
        QLA82XX_HW_CRB_HUB_AGT_ADR_MN,
        QLA82XX_HW_CRB_HUB_AGT_ADR_MS,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_SRE,
        QLA82XX_HW_CRB_HUB_AGT_ADR_NIU,
        QLA82XX_HW_CRB_HUB_AGT_ADR_QMN,
        QLA82XX_HW_CRB_HUB_AGT_ADR_SQN0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_SQN1,
        QLA82XX_HW_CRB_HUB_AGT_ADR_SQN2,
        QLA82XX_HW_CRB_HUB_AGT_ADR_SQN3,
        QLA82XX_HW_CRB_HUB_AGT_ADR_I2Q,
        QLA82XX_HW_CRB_HUB_AGT_ADR_TIMR,
        QLA82XX_HW_CRB_HUB_AGT_ADR_ROMUSB,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGN4,
        QLA82XX_HW_CRB_HUB_AGT_ADR_XDMA,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGN0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGN1,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGN2,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGN3,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGND,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGNI,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGS0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGS1,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGS2,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGS3,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGSI,
        QLA82XX_HW_CRB_HUB_AGT_ADR_SN,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_EG,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PS,
        QLA82XX_HW_CRB_HUB_AGT_ADR_CAM,
        0,
        0,
        0,
        0,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_TIMR,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX1,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX2,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX3,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX4,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX5,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX6,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX7,
        QLA82XX_HW_CRB_HUB_AGT_ADR_XDMA,
        QLA82XX_HW_CRB_HUB_AGT_ADR_I2Q,
        QLA82XX_HW_CRB_HUB_AGT_ADR_ROMUSB,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX8,
        QLA82XX_HW_CRB_HUB_AGT_ADR_RPMX9,
        QLA82XX_HW_CRB_HUB_AGT_ADR_OCM0,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_SMB,
        QLA82XX_HW_CRB_HUB_AGT_ADR_I2C0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_I2C1,
        0,
        QLA82XX_HW_CRB_HUB_AGT_ADR_PGNC,
        0,
};

/* Device states */
static const char *const q_dev_state[] = {
        [QLA8XXX_DEV_UNKNOWN]           = "Unknown",
        [QLA8XXX_DEV_COLD]              = "Cold/Re-init",
        [QLA8XXX_DEV_INITIALIZING]      = "Initializing",
        [QLA8XXX_DEV_READY]             = "Ready",
        [QLA8XXX_DEV_NEED_RESET]        = "Need Reset",
        [QLA8XXX_DEV_NEED_QUIESCENT]    = "Need Quiescent",
        [QLA8XXX_DEV_FAILED]            = "Failed",
        [QLA8XXX_DEV_QUIESCENT]         = "Quiescent",
};

const char *qdev_state(uint32_t dev_state)
{
        return (dev_state < MAX_STATES) ? q_dev_state[dev_state] : "Unknown";
}

/*
 * In: 'off_in' is offset from CRB space in 128M pci map
 * Out: 'off_out' is 2M pci map addr
 * side effect: lock crb window
 */
static void
qla82xx_pci_set_crbwindow_2M(struct qla_hw_data *ha, ulong off_in,
                             void __iomem **off_out)
{
        u32 win_read;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        ha->crb_win = CRB_HI(off_in);
        writel(ha->crb_win, CRB_WINDOW_2M + ha->nx_pcibase);

        /* Read back value to make sure write has gone through before trying
         * to use it.
         */
        win_read = rd_reg_dword(CRB_WINDOW_2M + ha->nx_pcibase);
        if (win_read != ha->crb_win) {
                ql_dbg(ql_dbg_p3p, vha, 0xb000,
                    "%s: Written crbwin (0x%x) "
                    "!= Read crbwin (0x%x), off=0x%lx.\n",
                    __func__, ha->crb_win, win_read, off_in);
        }
        *off_out = (off_in & MASK(16)) + CRB_INDIRECT_2M + ha->nx_pcibase;
}

static int
qla82xx_pci_get_crb_addr_2M(struct qla_hw_data *ha, ulong off_in,
                            void __iomem **off_out)
{
        struct crb_128M_2M_sub_block_map *m;

        if (off_in >= QLA82XX_CRB_MAX)
                return -1;

        if (off_in >= QLA82XX_PCI_CAMQM && off_in < QLA82XX_PCI_CAMQM_2M_END) {
                *off_out = (off_in - QLA82XX_PCI_CAMQM) +
                    QLA82XX_PCI_CAMQM_2M_BASE + ha->nx_pcibase;
                return 0;
        }

        if (off_in < QLA82XX_PCI_CRBSPACE)
                return -1;

        off_in -= QLA82XX_PCI_CRBSPACE;

        /* Try direct map */
        m = &crb_128M_2M_map[CRB_BLK(off_in)].sub_block[CRB_SUBBLK(off_in)];

        if (m->valid && (m->start_128M <= off_in) && (m->end_128M > off_in)) {
                *off_out = off_in + m->start_2M - m->start_128M + ha->nx_pcibase;
                return 0;
        }
        /* Not in direct map, use crb window */
        *off_out = (void __iomem *)off_in;
        return 1;
}

#define CRB_WIN_LOCK_TIMEOUT 100000000
static int qla82xx_crb_win_lock(struct qla_hw_data *ha)
{
        int done = 0, timeout = 0;

        while (!done) {
                /* acquire semaphore3 from PCI HW block */
                done = qla82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM7_LOCK));
                if (done == 1)
                        break;
                if (timeout >= CRB_WIN_LOCK_TIMEOUT)
                        return -1;
                timeout++;
        }
        qla82xx_wr_32(ha, QLA82XX_CRB_WIN_LOCK_ID, ha->portnum);
        return 0;
}

int
qla82xx_wr_32(struct qla_hw_data *ha, ulong off_in, u32 data)
{
        void __iomem *off;
        unsigned long flags = 0;
        int rv;

        rv = qla82xx_pci_get_crb_addr_2M(ha, off_in, &off);

        BUG_ON(rv == -1);

        if (rv == 1) {
#ifndef __CHECKER__
                write_lock_irqsave(&ha->hw_lock, flags);
#endif
                qla82xx_crb_win_lock(ha);
                qla82xx_pci_set_crbwindow_2M(ha, off_in, &off);
        }

        writel(data, (void __iomem *)off);

        if (rv == 1) {
                qla82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM7_UNLOCK));
#ifndef __CHECKER__
                write_unlock_irqrestore(&ha->hw_lock, flags);
#endif
        }
        return 0;
}

int
qla82xx_rd_32(struct qla_hw_data *ha, ulong off_in)
{
        void __iomem *off;
        unsigned long flags = 0;
        int rv;
        u32 data;

        rv = qla82xx_pci_get_crb_addr_2M(ha, off_in, &off);

        BUG_ON(rv == -1);

        if (rv == 1) {
#ifndef __CHECKER__
                write_lock_irqsave(&ha->hw_lock, flags);
#endif
                qla82xx_crb_win_lock(ha);
                qla82xx_pci_set_crbwindow_2M(ha, off_in, &off);
        }
        data = rd_reg_dword(off);

        if (rv == 1) {
                qla82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM7_UNLOCK));
#ifndef __CHECKER__
                write_unlock_irqrestore(&ha->hw_lock, flags);
#endif
        }
        return data;
}

/*
 * Context: task, might sleep
 */
int qla82xx_idc_lock(struct qla_hw_data *ha)
{
        const int delay_ms = 100, timeout_ms = 2000;
        int done, total = 0;

        might_sleep();

        while (true) {
                /* acquire semaphore5 from PCI HW block */
                done = qla82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM5_LOCK));
                if (done == 1)
                        break;
                if (WARN_ON_ONCE(total >= timeout_ms))
                        return -1;

                total += delay_ms;
                msleep(delay_ms);
        }

        return 0;
}

void qla82xx_idc_unlock(struct qla_hw_data *ha)
{
        qla82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM5_UNLOCK));
}

/*
 * check memory access boundary.
 * used by test agent. support ddr access only for now
 */
static unsigned long
qla82xx_pci_mem_bound_check(struct qla_hw_data *ha,
        unsigned long long addr, int size)
{
        if (!addr_in_range(addr, QLA82XX_ADDR_DDR_NET,
                QLA82XX_ADDR_DDR_NET_MAX) ||
                !addr_in_range(addr + size - 1, QLA82XX_ADDR_DDR_NET,
                QLA82XX_ADDR_DDR_NET_MAX) ||
                ((size != 1) && (size != 2) && (size != 4) && (size != 8)))
                        return 0;
        else
                return 1;
}

static int qla82xx_pci_set_window_warning_count;

static unsigned long
qla82xx_pci_set_window(struct qla_hw_data *ha, unsigned long long addr)
{
        int window;
        u32 win_read;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        if (addr_in_range(addr, QLA82XX_ADDR_DDR_NET,
                QLA82XX_ADDR_DDR_NET_MAX)) {
                /* DDR network side */
                window = MN_WIN(addr);
                ha->ddr_mn_window = window;
                qla82xx_wr_32(ha,
                        ha->mn_win_crb | QLA82XX_PCI_CRBSPACE, window);
                win_read = qla82xx_rd_32(ha,
                        ha->mn_win_crb | QLA82XX_PCI_CRBSPACE);
                if ((win_read << 17) != window) {
                        ql_dbg(ql_dbg_p3p, vha, 0xb003,
                            "%s: Written MNwin (0x%x) != Read MNwin (0x%x).\n",
                            __func__, window, win_read);
                }
                addr = GET_MEM_OFFS_2M(addr) + QLA82XX_PCI_DDR_NET;
        } else if (addr_in_range(addr, QLA82XX_ADDR_OCM0,
                QLA82XX_ADDR_OCM0_MAX)) {
                unsigned int temp1;

                if ((addr & 0x00ff800) == 0xff800) {
                        ql_log(ql_log_warn, vha, 0xb004,
                            "%s: QM access not handled.\n", __func__);
                        addr = -1UL;
                }
                window = OCM_WIN(addr);
                ha->ddr_mn_window = window;
                qla82xx_wr_32(ha,
                        ha->mn_win_crb | QLA82XX_PCI_CRBSPACE, window);
                win_read = qla82xx_rd_32(ha,
                        ha->mn_win_crb | QLA82XX_PCI_CRBSPACE);
                temp1 = ((window & 0x1FF) << 7) |
                    ((window & 0x0FFFE0000) >> 17);
                if (win_read != temp1) {
                        ql_log(ql_log_warn, vha, 0xb005,
                            "%s: Written OCMwin (0x%x) != Read OCMwin (0x%x).\n",
                            __func__, temp1, win_read);
                }
                addr = GET_MEM_OFFS_2M(addr) + QLA82XX_PCI_OCM0_2M;

        } else if (addr_in_range(addr, QLA82XX_ADDR_QDR_NET,
                QLA82XX_P3_ADDR_QDR_NET_MAX)) {
                /* QDR network side */
                window = MS_WIN(addr);
                ha->qdr_sn_window = window;
                qla82xx_wr_32(ha,
                        ha->ms_win_crb | QLA82XX_PCI_CRBSPACE, window);
                win_read = qla82xx_rd_32(ha,
                        ha->ms_win_crb | QLA82XX_PCI_CRBSPACE);
                if (win_read != window) {
                        ql_log(ql_log_warn, vha, 0xb006,
                            "%s: Written MSwin (0x%x) != Read MSwin (0x%x).\n",
                            __func__, window, win_read);
                }
                addr = GET_MEM_OFFS_2M(addr) + QLA82XX_PCI_QDR_NET;
        } else {
                /*
                 * peg gdb frequently accesses memory that doesn't exist,
                 * this limits the chit chat so debugging isn't slowed down.
                 */
                if ((qla82xx_pci_set_window_warning_count++ < 8) ||
                    (qla82xx_pci_set_window_warning_count%64 == 0)) {
                        ql_log(ql_log_warn, vha, 0xb007,
                            "%s: Warning:%s Unknown address range!.\n",
                            __func__, QLA2XXX_DRIVER_NAME);
                }
                addr = -1UL;
        }
        return addr;
}

/* check if address is in the same windows as the previous access */
static int qla82xx_pci_is_same_window(struct qla_hw_data *ha,
        unsigned long long addr)
{
        int                     window;
        unsigned long long      qdr_max;

        qdr_max = QLA82XX_P3_ADDR_QDR_NET_MAX;

        /* DDR network side */
        if (addr_in_range(addr, QLA82XX_ADDR_DDR_NET,
                QLA82XX_ADDR_DDR_NET_MAX))
                BUG();
        else if (addr_in_range(addr, QLA82XX_ADDR_OCM0,
                QLA82XX_ADDR_OCM0_MAX))
                return 1;
        else if (addr_in_range(addr, QLA82XX_ADDR_OCM1,
                QLA82XX_ADDR_OCM1_MAX))
                return 1;
        else if (addr_in_range(addr, QLA82XX_ADDR_QDR_NET, qdr_max)) {
                /* QDR network side */
                window = ((addr - QLA82XX_ADDR_QDR_NET) >> 22) & 0x3f;
                if (ha->qdr_sn_window == window)
                        return 1;
        }
        return 0;
}

static int qla82xx_pci_mem_read_direct(struct qla_hw_data *ha,
        u64 off, void *data, int size)
{
        unsigned long   flags;
        void __iomem *addr = NULL;
        int             ret = 0;
        u64             start;
        uint8_t __iomem  *mem_ptr = NULL;
        unsigned long   mem_base;
        unsigned long   mem_page;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        write_lock_irqsave(&ha->hw_lock, flags);

        /*
         * If attempting to access unknown address or straddle hw windows,
         * do not access.
         */
        start = qla82xx_pci_set_window(ha, off);
        if ((start == -1UL) ||
                (qla82xx_pci_is_same_window(ha, off + size - 1) == 0)) {
                write_unlock_irqrestore(&ha->hw_lock, flags);
                ql_log(ql_log_fatal, vha, 0xb008,
                    "%s out of bound pci memory "
                    "access, offset is 0x%llx.\n",
                    QLA2XXX_DRIVER_NAME, off);
                return -1;
        }

        write_unlock_irqrestore(&ha->hw_lock, flags);
        mem_base = pci_resource_start(ha->pdev, 0);
        mem_page = start & PAGE_MASK;
        /* Map two pages whenever user tries to access addresses in two
        * consecutive pages.
        */
        if (mem_page != ((start + size - 1) & PAGE_MASK))
                mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE * 2);
        else
                mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE);
        if (mem_ptr == NULL) {
                *(u8  *)data = 0;
                return -1;
        }
        addr = mem_ptr;
        addr += start & (PAGE_SIZE - 1);
        write_lock_irqsave(&ha->hw_lock, flags);

        switch (size) {
        case 1:
                *(u8  *)data = readb(addr);
                break;
        case 2:
                *(u16 *)data = readw(addr);
                break;
        case 4:
                *(u32 *)data = readl(addr);
                break;
        case 8:
                *(u64 *)data = readq(addr);
                break;
        default:
                ret = -1;
                break;
        }
        write_unlock_irqrestore(&ha->hw_lock, flags);

        if (mem_ptr)
                iounmap(mem_ptr);
        return ret;
}

static int
qla82xx_pci_mem_write_direct(struct qla_hw_data *ha,
        u64 off, void *data, int size)
{
        unsigned long   flags;
        void  __iomem *addr = NULL;
        int             ret = 0;
        u64             start;
        uint8_t __iomem *mem_ptr = NULL;
        unsigned long   mem_base;
        unsigned long   mem_page;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        write_lock_irqsave(&ha->hw_lock, flags);

        /*
         * If attempting to access unknown address or straddle hw windows,
         * do not access.
         */
        start = qla82xx_pci_set_window(ha, off);
        if ((start == -1UL) ||
                (qla82xx_pci_is_same_window(ha, off + size - 1) == 0)) {
                write_unlock_irqrestore(&ha->hw_lock, flags);
                ql_log(ql_log_fatal, vha, 0xb009,
                    "%s out of bound memory "
                    "access, offset is 0x%llx.\n",
                    QLA2XXX_DRIVER_NAME, off);
                return -1;
        }

        write_unlock_irqrestore(&ha->hw_lock, flags);
        mem_base = pci_resource_start(ha->pdev, 0);
        mem_page = start & PAGE_MASK;
        /* Map two pages whenever user tries to access addresses in two
         * consecutive pages.
         */
        if (mem_page != ((start + size - 1) & PAGE_MASK))
                mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE*2);
        else
                mem_ptr = ioremap(mem_base + mem_page, PAGE_SIZE);
        if (mem_ptr == NULL)
                return -1;

        addr = mem_ptr;
        addr += start & (PAGE_SIZE - 1);
        write_lock_irqsave(&ha->hw_lock, flags);

        switch (size) {
        case 1:
                writeb(*(u8  *)data, addr);
                break;
        case 2:
                writew(*(u16 *)data, addr);
                break;
        case 4:
                writel(*(u32 *)data, addr);
                break;
        case 8:
                writeq(*(u64 *)data, addr);
                break;
        default:
                ret = -1;
                break;
        }
        write_unlock_irqrestore(&ha->hw_lock, flags);
        if (mem_ptr)
                iounmap(mem_ptr);
        return ret;
}

#define MTU_FUDGE_FACTOR 100
static unsigned long
qla82xx_decode_crb_addr(unsigned long addr)
{
        int i;
        unsigned long base_addr, offset, pci_base;

        if (!qla82xx_crb_table_initialized)
                qla82xx_crb_addr_transform_setup();

        pci_base = ADDR_ERROR;
        base_addr = addr & 0xfff00000;
        offset = addr & 0x000fffff;

        for (i = 0; i < MAX_CRB_XFORM; i++) {
                if (crb_addr_xform[i] == base_addr) {
                        pci_base = i << 20;
                        break;
                }
        }
        if (pci_base == ADDR_ERROR)
                return pci_base;
        return pci_base + offset;
}

static long rom_max_timeout = 100;
static long qla82xx_rom_lock_timeout = 100;

static int
qla82xx_rom_lock(struct qla_hw_data *ha)
{
        int done = 0, timeout = 0;
        uint32_t lock_owner = 0;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        while (!done) {
                /* acquire semaphore2 from PCI HW block */
                done = qla82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM2_LOCK));
                if (done == 1)
                        break;
                if (timeout >= qla82xx_rom_lock_timeout) {
                        lock_owner = qla82xx_rd_32(ha, QLA82XX_ROM_LOCK_ID);
                        ql_dbg(ql_dbg_p3p, vha, 0xb157,
                            "%s: Simultaneous flash access by following ports, active port = %d: accessing port = %d",
                            __func__, ha->portnum, lock_owner);
                        return -1;
                }
                timeout++;
        }
        qla82xx_wr_32(ha, QLA82XX_ROM_LOCK_ID, ha->portnum);
        return 0;
}

static void
qla82xx_rom_unlock(struct qla_hw_data *ha)
{
        qla82xx_wr_32(ha, QLA82XX_ROM_LOCK_ID, 0xffffffff);
        qla82xx_rd_32(ha, QLA82XX_PCIE_REG(PCIE_SEM2_UNLOCK));
}

static int
qla82xx_wait_rom_busy(struct qla_hw_data *ha)
{
        long timeout = 0;
        long done = 0 ;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        while (done == 0) {
                done = qla82xx_rd_32(ha, QLA82XX_ROMUSB_GLB_STATUS);
                done &= 4;
                timeout++;
                if (timeout >= rom_max_timeout) {
                        ql_dbg(ql_dbg_p3p, vha, 0xb00a,
                            "%s: Timeout reached waiting for rom busy.\n",
                            QLA2XXX_DRIVER_NAME);
                        return -1;
                }
        }
        return 0;
}

static int
qla82xx_wait_rom_done(struct qla_hw_data *ha)
{
        long timeout = 0;
        long done = 0 ;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        while (done == 0) {
                done = qla82xx_rd_32(ha, QLA82XX_ROMUSB_GLB_STATUS);
                done &= 2;
                timeout++;
                if (timeout >= rom_max_timeout) {
                        ql_dbg(ql_dbg_p3p, vha, 0xb00b,
                            "%s: Timeout reached waiting for rom done.\n",
                            QLA2XXX_DRIVER_NAME);
                        return -1;
                }
        }
        return 0;
}

static int
qla82xx_md_rw_32(struct qla_hw_data *ha, uint32_t off, u32 data, uint8_t flag)
{
        uint32_t  off_value, rval = 0;

        wrt_reg_dword(CRB_WINDOW_2M + ha->nx_pcibase, off & 0xFFFF0000);

        /* Read back value to make sure write has gone through */
        rd_reg_dword(CRB_WINDOW_2M + ha->nx_pcibase);
        off_value  = (off & 0x0000FFFF);

        if (flag)
                wrt_reg_dword(off_value + CRB_INDIRECT_2M + ha->nx_pcibase,
                              data);
        else
                rval = rd_reg_dword(off_value + CRB_INDIRECT_2M +
                                    ha->nx_pcibase);

        return rval;
}

static int
qla82xx_do_rom_fast_read(struct qla_hw_data *ha, int addr, int *valp)
{
        /* Dword reads to flash. */
        qla82xx_md_rw_32(ha, MD_DIRECT_ROM_WINDOW, (addr & 0xFFFF0000), 1);
        *valp = qla82xx_md_rw_32(ha, MD_DIRECT_ROM_READ_BASE +
            (addr & 0x0000FFFF), 0, 0);

        return 0;
}

static int
qla82xx_rom_fast_read(struct qla_hw_data *ha, int addr, int *valp)
{
        int ret, loops = 0;
        uint32_t lock_owner = 0;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        while ((qla82xx_rom_lock(ha) != 0) && (loops < 50000)) {
                udelay(100);
                schedule();
                loops++;
        }
        if (loops >= 50000) {
                lock_owner = qla82xx_rd_32(ha, QLA82XX_ROM_LOCK_ID);
                ql_log(ql_log_fatal, vha, 0x00b9,
                    "Failed to acquire SEM2 lock, Lock Owner %u.\n",
                    lock_owner);
                return -1;
        }
        ret = qla82xx_do_rom_fast_read(ha, addr, valp);
        qla82xx_rom_unlock(ha);
        return ret;
}

static int
qla82xx_read_status_reg(struct qla_hw_data *ha, uint32_t *val)
{
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_INSTR_OPCODE, M25P_INSTR_RDSR);
        qla82xx_wait_rom_busy(ha);
        if (qla82xx_wait_rom_done(ha)) {
                ql_log(ql_log_warn, vha, 0xb00c,
                    "Error waiting for rom done.\n");
                return -1;
        }
        *val = qla82xx_rd_32(ha, QLA82XX_ROMUSB_ROM_RDATA);
        return 0;
}

static int
qla82xx_flash_wait_write_finish(struct qla_hw_data *ha)
{
        uint32_t val = 0;
        int i, ret;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_ABYTE_CNT, 0);
        for (i = 0; i < 50000; i++) {
                ret = qla82xx_read_status_reg(ha, &val);
                if (ret < 0 || (val & 1) == 0)
                        return ret;
                udelay(10);
                cond_resched();
        }
        ql_log(ql_log_warn, vha, 0xb00d,
               "Timeout reached waiting for write finish.\n");
        return -1;
}

static int
qla82xx_flash_set_write_enable(struct qla_hw_data *ha)
{
        uint32_t val;

        qla82xx_wait_rom_busy(ha);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_ABYTE_CNT, 0);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_INSTR_OPCODE, M25P_INSTR_WREN);
        qla82xx_wait_rom_busy(ha);
        if (qla82xx_wait_rom_done(ha))
                return -1;
        if (qla82xx_read_status_reg(ha, &val) != 0)
                return -1;
        if ((val & 2) != 2)
                return -1;
        return 0;
}

static int
qla82xx_write_status_reg(struct qla_hw_data *ha, uint32_t val)
{
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        if (qla82xx_flash_set_write_enable(ha))
                return -1;
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_WDATA, val);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_INSTR_OPCODE, 0x1);
        if (qla82xx_wait_rom_done(ha)) {
                ql_log(ql_log_warn, vha, 0xb00e,
                    "Error waiting for rom done.\n");
                return -1;
        }
        return qla82xx_flash_wait_write_finish(ha);
}

static int
qla82xx_write_disable_flash(struct qla_hw_data *ha)
{
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_INSTR_OPCODE, M25P_INSTR_WRDI);
        if (qla82xx_wait_rom_done(ha)) {
                ql_log(ql_log_warn, vha, 0xb00f,
                    "Error waiting for rom done.\n");
                return -1;
        }
        return 0;
}

static int
ql82xx_rom_lock_d(struct qla_hw_data *ha)
{
        int loops = 0;
        uint32_t lock_owner = 0;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        while ((qla82xx_rom_lock(ha) != 0) && (loops < 50000)) {
                udelay(100);
                cond_resched();
                loops++;
        }
        if (loops >= 50000) {
                lock_owner = qla82xx_rd_32(ha, QLA82XX_ROM_LOCK_ID);
                ql_log(ql_log_warn, vha, 0xb010,
                    "ROM lock failed, Lock Owner %u.\n", lock_owner);
                return -1;
        }
        return 0;
}

static int
qla82xx_write_flash_dword(struct qla_hw_data *ha, uint32_t flashaddr,
        uint32_t data)
{
        int ret = 0;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        ret = ql82xx_rom_lock_d(ha);
        if (ret < 0) {
                ql_log(ql_log_warn, vha, 0xb011,
                    "ROM lock failed.\n");
                return ret;
        }

        ret = qla82xx_flash_set_write_enable(ha);
        if (ret < 0)
                goto done_write;

        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_WDATA, data);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_ADDRESS, flashaddr);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_ABYTE_CNT, 3);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_INSTR_OPCODE, M25P_INSTR_PP);
        qla82xx_wait_rom_busy(ha);
        if (qla82xx_wait_rom_done(ha)) {
                ql_log(ql_log_warn, vha, 0xb012,
                    "Error waiting for rom done.\n");
                ret = -1;
                goto done_write;
        }

        ret = qla82xx_flash_wait_write_finish(ha);

done_write:
        qla82xx_rom_unlock(ha);
        return ret;
}

/* This routine does CRB initialize sequence
 *  to put the ISP into operational state
 */
static int
qla82xx_pinit_from_rom(scsi_qla_host_t *vha)
{
        int addr, val;
        int i ;
        struct crb_addr_pair *buf;
        unsigned long off;
        unsigned offset, n;
        struct qla_hw_data *ha = vha->hw;

        /* Halt all the individual PEGs and other blocks of the ISP */
        qla82xx_rom_lock(ha);

        /* disable all I2Q */
        qla82xx_wr_32(ha, QLA82XX_CRB_I2Q + 0x10, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_I2Q + 0x14, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_I2Q + 0x18, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_I2Q + 0x1c, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_I2Q + 0x20, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_I2Q + 0x24, 0x0);

        /* disable all niu interrupts */
        qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0x40, 0xff);
        /* disable xge rx/tx */
        qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0x70000, 0x00);
        /* disable xg1 rx/tx */
        qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0x80000, 0x00);
        /* disable sideband mac */
        qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0x90000, 0x00);
        /* disable ap0 mac */
        qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0xa0000, 0x00);
        /* disable ap1 mac */
        qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0xb0000, 0x00);

        /* halt sre */
        val = qla82xx_rd_32(ha, QLA82XX_CRB_SRE + 0x1000);
        qla82xx_wr_32(ha, QLA82XX_CRB_SRE + 0x1000, val & (~(0x1)));

        /* halt epg */
        qla82xx_wr_32(ha, QLA82XX_CRB_EPG + 0x1300, 0x1);

        /* halt timers */
        qla82xx_wr_32(ha, QLA82XX_CRB_TIMER + 0x0, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_TIMER + 0x8, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_TIMER + 0x10, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_TIMER + 0x18, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_TIMER + 0x100, 0x0);
        qla82xx_wr_32(ha, QLA82XX_CRB_TIMER + 0x200, 0x0);

        /* halt pegs */
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_0 + 0x3c, 1);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_1 + 0x3c, 1);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_2 + 0x3c, 1);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_3 + 0x3c, 1);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_4 + 0x3c, 1);
        msleep(20);

        /* big hammer */
        if (test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
                /* don't reset CAM block on reset */
                qla82xx_wr_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET, 0xfeffffff);
        else
                qla82xx_wr_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET, 0xffffffff);
        qla82xx_rom_unlock(ha);

        /* Read the signature value from the flash.
         * Offset 0: Contain signature (0xcafecafe)
         * Offset 4: Offset and number of addr/value pairs
         * that present in CRB initialize sequence
         */
        n = 0;
        if (qla82xx_rom_fast_read(ha, 0, &n) != 0 || n != 0xcafecafeUL ||
            qla82xx_rom_fast_read(ha, 4, &n) != 0) {
                ql_log(ql_log_fatal, vha, 0x006e,
                    "Error Reading crb_init area: n: %08x.\n", n);
                return -1;
        }

        /* Offset in flash = lower 16 bits
         * Number of entries = upper 16 bits
         */
        offset = n & 0xffffU;
        n = (n >> 16) & 0xffffU;

        /* number of addr/value pair should not exceed 1024 entries */
        if (n  >= 1024) {
                ql_log(ql_log_fatal, vha, 0x0071,
                    "Card flash not initialized:n=0x%x.\n", n);
                return -1;
        }

        ql_log(ql_log_info, vha, 0x0072,
            "%d CRB init values found in ROM.\n", n);

        buf = kmalloc_objs(struct crb_addr_pair, n);
        if (buf == NULL) {
                ql_log(ql_log_fatal, vha, 0x010c,
                    "Unable to allocate memory.\n");
                return -ENOMEM;
        }

        for (i = 0; i < n; i++) {
                if (qla82xx_rom_fast_read(ha, 8*i + 4*offset, &val) != 0 ||
                    qla82xx_rom_fast_read(ha, 8*i + 4*offset + 4, &addr) != 0) {
                        kfree(buf);
                        return -1;
                }

                buf[i].addr = addr;
                buf[i].data = val;
        }

        for (i = 0; i < n; i++) {
                /* Translate internal CRB initialization
                 * address to PCI bus address
                 */
                off = qla82xx_decode_crb_addr((unsigned long)buf[i].addr) +
                    QLA82XX_PCI_CRBSPACE;
                /* Not all CRB  addr/value pair to be written,
                 * some of them are skipped
                 */

                /* skipping cold reboot MAGIC */
                if (off == QLA82XX_CAM_RAM(0x1fc))
                        continue;

                /* do not reset PCI */
                if (off == (ROMUSB_GLB + 0xbc))
                        continue;

                /* skip core clock, so that firmware can increase the clock */
                if (off == (ROMUSB_GLB + 0xc8))
                        continue;

                /* skip the function enable register */
                if (off == QLA82XX_PCIE_REG(PCIE_SETUP_FUNCTION))
                        continue;

                if (off == QLA82XX_PCIE_REG(PCIE_SETUP_FUNCTION2))
                        continue;

                if ((off & 0x0ff00000) == QLA82XX_CRB_SMB)
                        continue;

                if ((off & 0x0ff00000) == QLA82XX_CRB_DDR_NET)
                        continue;

                if (off == ADDR_ERROR) {
                        ql_log(ql_log_fatal, vha, 0x0116,
                            "Unknown addr: 0x%08lx.\n", buf[i].addr);
                        continue;
                }

                qla82xx_wr_32(ha, off, buf[i].data);

                /* ISP requires much bigger delay to settle down,
                 * else crb_window returns 0xffffffff
                 */
                if (off == QLA82XX_ROMUSB_GLB_SW_RESET)
                        msleep(1000);

                /* ISP requires millisec delay between
                 * successive CRB register updation
                 */
                msleep(1);
        }

        kfree(buf);

        /* Resetting the data and instruction cache */
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_D+0xec, 0x1e);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_D+0x4c, 8);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_I+0x4c, 8);

        /* Clear all protocol processing engines */
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_0+0x8, 0);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_0+0xc, 0);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_1+0x8, 0);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_1+0xc, 0);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_2+0x8, 0);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_2+0xc, 0);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_3+0x8, 0);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_3+0xc, 0);
        return 0;
}

static int
qla82xx_pci_mem_write_2M(struct qla_hw_data *ha,
                u64 off, void *data, int size)
{
        int i, j, ret = 0, loop, sz[2], off0;
        int scale, shift_amount, startword;
        uint32_t temp;
        uint64_t off8, mem_crb, tmpw, word[2] = {0, 0};

        /*
         * If not MN, go check for MS or invalid.
         */
        if (off >= QLA82XX_ADDR_QDR_NET && off <= QLA82XX_P3_ADDR_QDR_NET_MAX)
                mem_crb = QLA82XX_CRB_QDR_NET;
        else {
                mem_crb = QLA82XX_CRB_DDR_NET;
                if (qla82xx_pci_mem_bound_check(ha, off, size) == 0)
                        return qla82xx_pci_mem_write_direct(ha,
                            off, data, size);
        }

        off0 = off & 0x7;
        sz[0] = (size < (8 - off0)) ? size : (8 - off0);
        sz[1] = size - sz[0];

        off8 = off & 0xfffffff0;
        loop = (((off & 0xf) + size - 1) >> 4) + 1;
        shift_amount = 4;
        scale = 2;
        startword = (off & 0xf)/8;

        for (i = 0; i < loop; i++) {
                if (qla82xx_pci_mem_read_2M(ha, off8 +
                    (i << shift_amount), &word[i * scale], 8))
                        return -1;
        }

        switch (size) {
        case 1:
                tmpw = *((uint8_t *)data);
                break;
        case 2:
                tmpw = *((uint16_t *)data);
                break;
        case 4:
                tmpw = *((uint32_t *)data);
                break;
        case 8:
        default:
                tmpw = *((uint64_t *)data);
                break;
        }

        if (sz[0] == 8) {
                word[startword] = tmpw;
        } else {
                word[startword] &=
                        ~((~(~0ULL << (sz[0] * 8))) << (off0 * 8));
                word[startword] |= tmpw << (off0 * 8);
        }
        if (sz[1] != 0) {
                word[startword+1] &= ~(~0ULL << (sz[1] * 8));
                word[startword+1] |= tmpw >> (sz[0] * 8);
        }

        for (i = 0; i < loop; i++) {
                temp = off8 + (i << shift_amount);
                qla82xx_wr_32(ha, mem_crb+MIU_TEST_AGT_ADDR_LO, temp);
                temp = 0;
                qla82xx_wr_32(ha, mem_crb+MIU_TEST_AGT_ADDR_HI, temp);
                temp = word[i * scale] & 0xffffffff;
                qla82xx_wr_32(ha, mem_crb+MIU_TEST_AGT_WRDATA_LO, temp);
                temp = (word[i * scale] >> 32) & 0xffffffff;
                qla82xx_wr_32(ha, mem_crb+MIU_TEST_AGT_WRDATA_HI, temp);
                temp = word[i*scale + 1] & 0xffffffff;
                qla82xx_wr_32(ha, mem_crb +
                    MIU_TEST_AGT_WRDATA_UPPER_LO, temp);
                temp = (word[i*scale + 1] >> 32) & 0xffffffff;
                qla82xx_wr_32(ha, mem_crb +
                    MIU_TEST_AGT_WRDATA_UPPER_HI, temp);

                temp = MIU_TA_CTL_ENABLE | MIU_TA_CTL_WRITE;
                qla82xx_wr_32(ha, mem_crb + MIU_TEST_AGT_CTRL, temp);
                temp = MIU_TA_CTL_START | MIU_TA_CTL_ENABLE | MIU_TA_CTL_WRITE;
                qla82xx_wr_32(ha, mem_crb + MIU_TEST_AGT_CTRL, temp);

                for (j = 0; j < MAX_CTL_CHECK; j++) {
                        temp = qla82xx_rd_32(ha, mem_crb + MIU_TEST_AGT_CTRL);
                        if ((temp & MIU_TA_CTL_BUSY) == 0)
                                break;
                }

                if (j >= MAX_CTL_CHECK) {
                        if (printk_ratelimit())
                                dev_err(&ha->pdev->dev,
                                    "failed to write through agent.\n");
                        ret = -1;
                        break;
                }
        }

        return ret;
}

static int
qla82xx_fw_load_from_flash(struct qla_hw_data *ha)
{
        int  i;
        long size = 0;
        long flashaddr = ha->flt_region_bootload << 2;
        long memaddr = BOOTLD_START;
        u64 data;
        u32 high, low;

        size = (IMAGE_START - BOOTLD_START) / 8;

        for (i = 0; i < size; i++) {
                if ((qla82xx_rom_fast_read(ha, flashaddr, (int *)&low)) ||
                    (qla82xx_rom_fast_read(ha, flashaddr + 4, (int *)&high))) {
                        return -1;
                }
                data = ((u64)high << 32) | low ;
                qla82xx_pci_mem_write_2M(ha, memaddr, &data, 8);
                flashaddr += 8;
                memaddr += 8;

                if (i % 0x1000 == 0)
                        msleep(1);
        }
        udelay(100);
        read_lock(&ha->hw_lock);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_0 + 0x18, 0x1020);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET, 0x80001e);
        read_unlock(&ha->hw_lock);
        return 0;
}

int
qla82xx_pci_mem_read_2M(struct qla_hw_data *ha,
                u64 off, void *data, int size)
{
        int i, j = 0, k, start, end, loop, sz[2], off0[2];
        int           shift_amount;
        uint32_t      temp;
        uint64_t      off8, val, mem_crb, word[2] = {0, 0};

        /*
         * If not MN, go check for MS or invalid.
         */

        if (off >= QLA82XX_ADDR_QDR_NET && off <= QLA82XX_P3_ADDR_QDR_NET_MAX)
                mem_crb = QLA82XX_CRB_QDR_NET;
        else {
                mem_crb = QLA82XX_CRB_DDR_NET;
                if (qla82xx_pci_mem_bound_check(ha, off, size) == 0)
                        return qla82xx_pci_mem_read_direct(ha,
                            off, data, size);
        }

        off8 = off & 0xfffffff0;
        off0[0] = off & 0xf;
        sz[0] = (size < (16 - off0[0])) ? size : (16 - off0[0]);
        shift_amount = 4;
        loop = ((off0[0] + size - 1) >> shift_amount) + 1;
        off0[1] = 0;
        sz[1] = size - sz[0];

        for (i = 0; i < loop; i++) {
                temp = off8 + (i << shift_amount);
                qla82xx_wr_32(ha, mem_crb + MIU_TEST_AGT_ADDR_LO, temp);
                temp = 0;
                qla82xx_wr_32(ha, mem_crb + MIU_TEST_AGT_ADDR_HI, temp);
                temp = MIU_TA_CTL_ENABLE;
                qla82xx_wr_32(ha, mem_crb + MIU_TEST_AGT_CTRL, temp);
                temp = MIU_TA_CTL_START | MIU_TA_CTL_ENABLE;
                qla82xx_wr_32(ha, mem_crb + MIU_TEST_AGT_CTRL, temp);

                for (j = 0; j < MAX_CTL_CHECK; j++) {
                        temp = qla82xx_rd_32(ha, mem_crb + MIU_TEST_AGT_CTRL);
                        if ((temp & MIU_TA_CTL_BUSY) == 0)
                                break;
                }

                if (j >= MAX_CTL_CHECK) {
                        if (printk_ratelimit())
                                dev_err(&ha->pdev->dev,
                                    "failed to read through agent.\n");
                        break;
                }

                start = off0[i] >> 2;
                end   = (off0[i] + sz[i] - 1) >> 2;
                for (k = start; k <= end; k++) {
                        temp = qla82xx_rd_32(ha,
                                        mem_crb + MIU_TEST_AGT_RDDATA(k));
                        word[i] |= ((uint64_t)temp << (32 * (k & 1)));
                }
        }

        if (j >= MAX_CTL_CHECK)
                return -1;

        if ((off0[0] & 7) == 0) {
                val = word[0];
        } else {
                val = ((word[0] >> (off0[0] * 8)) & (~(~0ULL << (sz[0] * 8)))) |
                        ((word[1] & (~(~0ULL << (sz[1] * 8)))) << (sz[0] * 8));
        }

        switch (size) {
        case 1:
                *(uint8_t  *)data = val;
                break;
        case 2:
                *(uint16_t *)data = val;
                break;
        case 4:
                *(uint32_t *)data = val;
                break;
        case 8:
                *(uint64_t *)data = val;
                break;
        }
        return 0;
}


static struct qla82xx_uri_table_desc *
qla82xx_get_table_desc(const u8 *unirom, int section)
{
        uint32_t i;
        struct qla82xx_uri_table_desc *directory =
                (struct qla82xx_uri_table_desc *)&unirom[0];
        uint32_t offset;
        uint32_t tab_type;
        uint32_t entries = le32_to_cpu(directory->num_entries);

        for (i = 0; i < entries; i++) {
                offset = le32_to_cpu(directory->findex) +
                    (i * le32_to_cpu(directory->entry_size));
                tab_type = get_unaligned_le32((u32 *)&unirom[offset] + 8);

                if (tab_type == section)
                        return (struct qla82xx_uri_table_desc *)&unirom[offset];
        }

        return NULL;
}

static struct qla82xx_uri_data_desc *
qla82xx_get_data_desc(struct qla_hw_data *ha,
        u32 section, u32 idx_offset)
{
        const u8 *unirom = ha->hablob->fw->data;
        int idx = get_unaligned_le32((u32 *)&unirom[ha->file_prd_off] +
                                     idx_offset);
        struct qla82xx_uri_table_desc *tab_desc = NULL;
        uint32_t offset;

        tab_desc = qla82xx_get_table_desc(unirom, section);
        if (!tab_desc)
                return NULL;

        offset = le32_to_cpu(tab_desc->findex) +
            (le32_to_cpu(tab_desc->entry_size) * idx);

        return (struct qla82xx_uri_data_desc *)&unirom[offset];
}

static u8 *
qla82xx_get_bootld_offset(struct qla_hw_data *ha)
{
        u32 offset = BOOTLD_START;
        struct qla82xx_uri_data_desc *uri_desc = NULL;

        if (ha->fw_type == QLA82XX_UNIFIED_ROMIMAGE) {
                uri_desc = qla82xx_get_data_desc(ha,
                    QLA82XX_URI_DIR_SECT_BOOTLD, QLA82XX_URI_BOOTLD_IDX_OFF);
                if (uri_desc)
                        offset = le32_to_cpu(uri_desc->findex);
        }

        return (u8 *)&ha->hablob->fw->data[offset];
}

static u32 qla82xx_get_fw_size(struct qla_hw_data *ha)
{
        struct qla82xx_uri_data_desc *uri_desc = NULL;

        if (ha->fw_type == QLA82XX_UNIFIED_ROMIMAGE) {
                uri_desc =  qla82xx_get_data_desc(ha, QLA82XX_URI_DIR_SECT_FW,
                    QLA82XX_URI_FIRMWARE_IDX_OFF);
                if (uri_desc)
                        return le32_to_cpu(uri_desc->size);
        }

        return get_unaligned_le32(&ha->hablob->fw->data[FW_SIZE_OFFSET]);
}

static u8 *
qla82xx_get_fw_offs(struct qla_hw_data *ha)
{
        u32 offset = IMAGE_START;
        struct qla82xx_uri_data_desc *uri_desc = NULL;

        if (ha->fw_type == QLA82XX_UNIFIED_ROMIMAGE) {
                uri_desc = qla82xx_get_data_desc(ha, QLA82XX_URI_DIR_SECT_FW,
                        QLA82XX_URI_FIRMWARE_IDX_OFF);
                if (uri_desc)
                        offset = le32_to_cpu(uri_desc->findex);
        }

        return (u8 *)&ha->hablob->fw->data[offset];
}

int
qla82xx_iospace_config(struct qla_hw_data *ha)
{
        uint32_t len = 0;

        if (pci_request_regions(ha->pdev, QLA2XXX_DRIVER_NAME)) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x000c,
                    "Failed to reserver selected regions.\n");
                goto iospace_error_exit;
        }

        /* Use MMIO operations for all accesses. */
        if (!(pci_resource_flags(ha->pdev, 0) & IORESOURCE_MEM)) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x000d,
                    "Region #0 not an MMIO resource, aborting.\n");
                goto iospace_error_exit;
        }

        len = pci_resource_len(ha->pdev, 0);
        ha->nx_pcibase = ioremap(pci_resource_start(ha->pdev, 0), len);
        if (!ha->nx_pcibase) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x000e,
                    "Cannot remap pcibase MMIO, aborting.\n");
                goto iospace_error_exit;
        }

        /* Mapping of IO base pointer */
        if (IS_QLA8044(ha)) {
                ha->iobase = ha->nx_pcibase;
        } else if (IS_QLA82XX(ha)) {
                ha->iobase = ha->nx_pcibase + 0xbc000 + (ha->pdev->devfn << 11);
        }

        if (!ql2xdbwr) {
                ha->nxdb_wr_ptr = ioremap((pci_resource_start(ha->pdev, 4) +
                    (ha->pdev->devfn << 12)), 4);
                if (!ha->nxdb_wr_ptr) {
                        ql_log_pci(ql_log_fatal, ha->pdev, 0x000f,
                            "Cannot remap MMIO, aborting.\n");
                        goto iospace_error_exit;
                }

                /* Mapping of IO base pointer,
                 * door bell read and write pointer
                 */
                ha->nxdb_rd_ptr = ha->nx_pcibase + (512 * 1024) +
                    (ha->pdev->devfn * 8);
        } else {
                ha->nxdb_wr_ptr = (void __iomem *)(ha->pdev->devfn == 6 ?
                        QLA82XX_CAMRAM_DB1 :
                        QLA82XX_CAMRAM_DB2);
        }

        ha->max_req_queues = ha->max_rsp_queues = 1;
        ha->msix_count = ha->max_rsp_queues + 1;
        ql_dbg_pci(ql_dbg_multiq, ha->pdev, 0xc006,
            "nx_pci_base=%p iobase=%p "
            "max_req_queues=%d msix_count=%d.\n",
            ha->nx_pcibase, ha->iobase,
            ha->max_req_queues, ha->msix_count);
        ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0010,
            "nx_pci_base=%p iobase=%p "
            "max_req_queues=%d msix_count=%d.\n",
            ha->nx_pcibase, ha->iobase,
            ha->max_req_queues, ha->msix_count);
        return 0;

iospace_error_exit:
        return -ENOMEM;
}

/* GS related functions */

/* Initialization related functions */

/**
 * qla82xx_pci_config() - Setup ISP82xx PCI configuration registers.
 * @vha: HA context
 *
 * Returns 0 on success.
*/
int
qla82xx_pci_config(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        int ret;

        pci_set_master(ha->pdev);
        ret = pci_set_mwi(ha->pdev);
        ha->chip_revision = ha->pdev->revision;
        ql_dbg(ql_dbg_init, vha, 0x0043,
            "Chip revision:%d; pci_set_mwi() returned %d.\n",
            ha->chip_revision, ret);
        return 0;
}

/**
 * qla82xx_reset_chip() - Setup ISP82xx PCI configuration registers.
 * @vha: HA context
 *
 * Returns 0 on success.
 */
int
qla82xx_reset_chip(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;

        ha->isp_ops->disable_intrs(ha);

        return QLA_SUCCESS;
}

void qla82xx_config_rings(struct scsi_qla_host *vha)
{
        struct qla_hw_data *ha = vha->hw;
        struct device_reg_82xx __iomem *reg = &ha->iobase->isp82;
        struct init_cb_81xx *icb;
        struct req_que *req = ha->req_q_map[0];
        struct rsp_que *rsp = ha->rsp_q_map[0];

        /* Setup ring parameters in initialization control block. */
        icb = (struct init_cb_81xx *)ha->init_cb;
        icb->request_q_outpointer = cpu_to_le16(0);
        icb->response_q_inpointer = cpu_to_le16(0);
        icb->request_q_length = cpu_to_le16(req->length);
        icb->response_q_length = cpu_to_le16(rsp->length);
        put_unaligned_le64(req->dma, &icb->request_q_address);
        put_unaligned_le64(rsp->dma, &icb->response_q_address);

        wrt_reg_dword(&reg->req_q_out[0], 0);
        wrt_reg_dword(&reg->rsp_q_in[0], 0);
        wrt_reg_dword(&reg->rsp_q_out[0], 0);
}

static int
qla82xx_fw_load_from_blob(struct qla_hw_data *ha)
{
        u64 *ptr64;
        u32 i, flashaddr, size;
        __le64 data;

        size = (IMAGE_START - BOOTLD_START) / 8;

        ptr64 = (u64 *)qla82xx_get_bootld_offset(ha);
        flashaddr = BOOTLD_START;

        for (i = 0; i < size; i++) {
                data = cpu_to_le64(ptr64[i]);
                if (qla82xx_pci_mem_write_2M(ha, flashaddr, &data, 8))
                        return -EIO;
                flashaddr += 8;
        }

        flashaddr = FLASH_ADDR_START;
        size = qla82xx_get_fw_size(ha) / 8;
        ptr64 = (u64 *)qla82xx_get_fw_offs(ha);

        for (i = 0; i < size; i++) {
                data = cpu_to_le64(ptr64[i]);

                if (qla82xx_pci_mem_write_2M(ha, flashaddr, &data, 8))
                        return -EIO;
                flashaddr += 8;
        }
        udelay(100);

        /* Write a magic value to CAMRAM register
         * at a specified offset to indicate
         * that all data is written and
         * ready for firmware to initialize.
         */
        qla82xx_wr_32(ha, QLA82XX_CAM_RAM(0x1fc), QLA82XX_BDINFO_MAGIC);

        read_lock(&ha->hw_lock);
        qla82xx_wr_32(ha, QLA82XX_CRB_PEG_NET_0 + 0x18, 0x1020);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET, 0x80001e);
        read_unlock(&ha->hw_lock);
        return 0;
}

static int
qla82xx_set_product_offset(struct qla_hw_data *ha)
{
        struct qla82xx_uri_table_desc *ptab_desc = NULL;
        const uint8_t *unirom = ha->hablob->fw->data;
        uint32_t i;
        uint32_t entries;
        uint32_t flags, file_chiprev, offset;
        uint8_t chiprev = ha->chip_revision;
        /* Hardcoding mn_present flag for P3P */
        int mn_present = 0;
        uint32_t flagbit;

        ptab_desc = qla82xx_get_table_desc(unirom,
                 QLA82XX_URI_DIR_SECT_PRODUCT_TBL);
        if (!ptab_desc)
                return -1;

        entries = le32_to_cpu(ptab_desc->num_entries);

        for (i = 0; i < entries; i++) {
                offset = le32_to_cpu(ptab_desc->findex) +
                        (i * le32_to_cpu(ptab_desc->entry_size));
                flags = le32_to_cpu(*((__le32 *)&unirom[offset] +
                        QLA82XX_URI_FLAGS_OFF));
                file_chiprev = le32_to_cpu(*((__le32 *)&unirom[offset] +
                        QLA82XX_URI_CHIP_REV_OFF));

                flagbit = mn_present ? 1 : 2;

                if ((chiprev == file_chiprev) && ((1ULL << flagbit) & flags)) {
                        ha->file_prd_off = offset;
                        return 0;
                }
        }
        return -1;
}

static int
qla82xx_validate_firmware_blob(scsi_qla_host_t *vha, uint8_t fw_type)
{
        uint32_t val;
        uint32_t min_size;
        struct qla_hw_data *ha = vha->hw;
        const struct firmware *fw = ha->hablob->fw;

        ha->fw_type = fw_type;

        if (fw_type == QLA82XX_UNIFIED_ROMIMAGE) {
                if (qla82xx_set_product_offset(ha))
                        return -EINVAL;

                min_size = QLA82XX_URI_FW_MIN_SIZE;
        } else {
                val = get_unaligned_le32(&fw->data[QLA82XX_FW_MAGIC_OFFSET]);
                if (val != QLA82XX_BDINFO_MAGIC)
                        return -EINVAL;

                min_size = QLA82XX_FW_MIN_SIZE;
        }

        if (fw->size < min_size)
                return -EINVAL;
        return 0;
}

static int
qla82xx_check_cmdpeg_state(struct qla_hw_data *ha)
{
        u32 val = 0;
        int retries = 60;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        do {
                read_lock(&ha->hw_lock);
                val = qla82xx_rd_32(ha, CRB_CMDPEG_STATE);
                read_unlock(&ha->hw_lock);

                switch (val) {
                case PHAN_INITIALIZE_COMPLETE:
                case PHAN_INITIALIZE_ACK:
                        return QLA_SUCCESS;
                case PHAN_INITIALIZE_FAILED:
                        break;
                default:
                        break;
                }
                ql_log(ql_log_info, vha, 0x00a8,
                    "CRB_CMDPEG_STATE: 0x%x and retries:0x%x.\n",
                    val, retries);

                msleep(500);

        } while (--retries);

        ql_log(ql_log_fatal, vha, 0x00a9,
            "Cmd Peg initialization failed: 0x%x.\n", val);

        val = qla82xx_rd_32(ha, QLA82XX_ROMUSB_GLB_PEGTUNE_DONE);
        read_lock(&ha->hw_lock);
        qla82xx_wr_32(ha, CRB_CMDPEG_STATE, PHAN_INITIALIZE_FAILED);
        read_unlock(&ha->hw_lock);
        return QLA_FUNCTION_FAILED;
}

static int
qla82xx_check_rcvpeg_state(struct qla_hw_data *ha)
{
        u32 val = 0;
        int retries = 60;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        do {
                read_lock(&ha->hw_lock);
                val = qla82xx_rd_32(ha, CRB_RCVPEG_STATE);
                read_unlock(&ha->hw_lock);

                switch (val) {
                case PHAN_INITIALIZE_COMPLETE:
                case PHAN_INITIALIZE_ACK:
                        return QLA_SUCCESS;
                case PHAN_INITIALIZE_FAILED:
                        break;
                default:
                        break;
                }
                ql_log(ql_log_info, vha, 0x00ab,
                    "CRB_RCVPEG_STATE: 0x%x and retries: 0x%x.\n",
                    val, retries);

                msleep(500);

        } while (--retries);

        ql_log(ql_log_fatal, vha, 0x00ac,
            "Rcv Peg initialization failed: 0x%x.\n", val);
        read_lock(&ha->hw_lock);
        qla82xx_wr_32(ha, CRB_RCVPEG_STATE, PHAN_INITIALIZE_FAILED);
        read_unlock(&ha->hw_lock);
        return QLA_FUNCTION_FAILED;
}

/* ISR related functions */
static struct qla82xx_legacy_intr_set legacy_intr[] =
        QLA82XX_LEGACY_INTR_CONFIG;

/*
 * qla82xx_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
void
qla82xx_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
{
        uint16_t        cnt;
        __le16 __iomem *wptr;
        struct qla_hw_data *ha = vha->hw;
        struct device_reg_82xx __iomem *reg = &ha->iobase->isp82;

        wptr = &reg->mailbox_out[1];

        /* Load return mailbox registers. */
        ha->flags.mbox_int = 1;
        ha->mailbox_out[0] = mb0;

        for (cnt = 1; cnt < ha->mbx_count; cnt++) {
                ha->mailbox_out[cnt] = rd_reg_word(wptr);
                wptr++;
        }

        if (!ha->mcp)
                ql_dbg(ql_dbg_async, vha, 0x5053,
                    "MBX pointer ERROR.\n");
}

/**
 * qla82xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 * @irq: interrupt number
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla82xx_intr_handler(int irq, void *dev_id)
{
        scsi_qla_host_t *vha;
        struct qla_hw_data *ha;
        struct rsp_que *rsp;
        struct device_reg_82xx __iomem *reg;
        int status = 0, status1 = 0;
        unsigned long   flags;
        unsigned long   iter;
        uint32_t        stat = 0;
        uint16_t        mb[8];

        rsp = (struct rsp_que *) dev_id;
        if (!rsp) {
                ql_log(ql_log_info, NULL, 0xb053,
                    "%s: NULL response queue pointer.\n", __func__);
                return IRQ_NONE;
        }
        ha = rsp->hw;

        if (!ha->flags.msi_enabled) {
                status = qla82xx_rd_32(ha, ISR_INT_VECTOR);
                if (!(status & ha->nx_legacy_intr.int_vec_bit))
                        return IRQ_NONE;

                status1 = qla82xx_rd_32(ha, ISR_INT_STATE_REG);
                if (!ISR_IS_LEGACY_INTR_TRIGGERED(status1))
                        return IRQ_NONE;
        }

        /* clear the interrupt */
        qla82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);

        /* read twice to ensure write is flushed */
        qla82xx_rd_32(ha, ISR_INT_VECTOR);
        qla82xx_rd_32(ha, ISR_INT_VECTOR);

        reg = &ha->iobase->isp82;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        vha = pci_get_drvdata(ha->pdev);
        for (iter = 1; iter--; ) {

                if (rd_reg_dword(&reg->host_int)) {
                        stat = rd_reg_dword(&reg->host_status);

                        switch (stat & 0xff) {
                        case 0x1:
                        case 0x2:
                        case 0x10:
                        case 0x11:
                                qla82xx_mbx_completion(vha, MSW(stat));
                                status |= MBX_INTERRUPT;
                                break;
                        case 0x12:
                                mb[0] = MSW(stat);
                                mb[1] = rd_reg_word(&reg->mailbox_out[1]);
                                mb[2] = rd_reg_word(&reg->mailbox_out[2]);
                                mb[3] = rd_reg_word(&reg->mailbox_out[3]);
                                qla2x00_async_event(vha, rsp, mb);
                                break;
                        case 0x13:
                                qla24xx_process_response_queue(vha, rsp);
                                break;
                        default:
                                ql_dbg(ql_dbg_async, vha, 0x5054,
                                    "Unrecognized interrupt type (%d).\n",
                                    stat & 0xff);
                                break;
                        }
                }
                wrt_reg_dword(&reg->host_int, 0);
        }

        qla2x00_handle_mbx_completion(ha, status);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        if (!ha->flags.msi_enabled)
                qla82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);

        return IRQ_HANDLED;
}

irqreturn_t
qla82xx_msix_default(int irq, void *dev_id)
{
        scsi_qla_host_t *vha;
        struct qla_hw_data *ha;
        struct rsp_que *rsp;
        struct device_reg_82xx __iomem *reg;
        int status = 0;
        unsigned long flags;
        uint32_t stat = 0;
        uint32_t host_int = 0;
        uint16_t mb[8];

        rsp = (struct rsp_que *) dev_id;
        if (!rsp) {
                printk(KERN_INFO
                        "%s(): NULL response queue pointer.\n", __func__);
                return IRQ_NONE;
        }
        ha = rsp->hw;

        reg = &ha->iobase->isp82;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        vha = pci_get_drvdata(ha->pdev);
        do {
                host_int = rd_reg_dword(&reg->host_int);
                if (qla2x00_check_reg32_for_disconnect(vha, host_int))
                        break;
                if (host_int) {
                        stat = rd_reg_dword(&reg->host_status);

                        switch (stat & 0xff) {
                        case 0x1:
                        case 0x2:
                        case 0x10:
                        case 0x11:
                                qla82xx_mbx_completion(vha, MSW(stat));
                                status |= MBX_INTERRUPT;
                                break;
                        case 0x12:
                                mb[0] = MSW(stat);
                                mb[1] = rd_reg_word(&reg->mailbox_out[1]);
                                mb[2] = rd_reg_word(&reg->mailbox_out[2]);
                                mb[3] = rd_reg_word(&reg->mailbox_out[3]);
                                qla2x00_async_event(vha, rsp, mb);
                                break;
                        case 0x13:
                                qla24xx_process_response_queue(vha, rsp);
                                break;
                        default:
                                ql_dbg(ql_dbg_async, vha, 0x5041,
                                    "Unrecognized interrupt type (%d).\n",
                                    stat & 0xff);
                                break;
                        }
                }
                wrt_reg_dword(&reg->host_int, 0);
        } while (0);

        qla2x00_handle_mbx_completion(ha, status);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        return IRQ_HANDLED;
}

irqreturn_t
qla82xx_msix_rsp_q(int irq, void *dev_id)
{
        scsi_qla_host_t *vha;
        struct qla_hw_data *ha;
        struct rsp_que *rsp;
        struct device_reg_82xx __iomem *reg;
        unsigned long flags;
        uint32_t host_int = 0;

        rsp = (struct rsp_que *) dev_id;
        if (!rsp) {
                printk(KERN_INFO
                        "%s(): NULL response queue pointer.\n", __func__);
                return IRQ_NONE;
        }

        ha = rsp->hw;
        reg = &ha->iobase->isp82;
        spin_lock_irqsave(&ha->hardware_lock, flags);
        vha = pci_get_drvdata(ha->pdev);
        host_int = rd_reg_dword(&reg->host_int);
        if (qla2x00_check_reg32_for_disconnect(vha, host_int))
                goto out;
        qla24xx_process_response_queue(vha, rsp);
        wrt_reg_dword(&reg->host_int, 0);
out:
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
        return IRQ_HANDLED;
}

void
qla82xx_poll(int irq, void *dev_id)
{
        scsi_qla_host_t *vha;
        struct qla_hw_data *ha;
        struct rsp_que *rsp;
        struct device_reg_82xx __iomem *reg;
        uint32_t stat;
        uint32_t host_int = 0;
        uint16_t mb[8];
        unsigned long flags;

        rsp = (struct rsp_que *) dev_id;
        if (!rsp) {
                printk(KERN_INFO
                        "%s(): NULL response queue pointer.\n", __func__);
                return;
        }
        ha = rsp->hw;

        reg = &ha->iobase->isp82;
        spin_lock_irqsave(&ha->hardware_lock, flags);
        vha = pci_get_drvdata(ha->pdev);

        host_int = rd_reg_dword(&reg->host_int);
        if (qla2x00_check_reg32_for_disconnect(vha, host_int))
                goto out;
        if (host_int) {
                stat = rd_reg_dword(&reg->host_status);
                switch (stat & 0xff) {
                case 0x1:
                case 0x2:
                case 0x10:
                case 0x11:
                        qla82xx_mbx_completion(vha, MSW(stat));
                        break;
                case 0x12:
                        mb[0] = MSW(stat);
                        mb[1] = rd_reg_word(&reg->mailbox_out[1]);
                        mb[2] = rd_reg_word(&reg->mailbox_out[2]);
                        mb[3] = rd_reg_word(&reg->mailbox_out[3]);
                        qla2x00_async_event(vha, rsp, mb);
                        break;
                case 0x13:
                        qla24xx_process_response_queue(vha, rsp);
                        break;
                default:
                        ql_dbg(ql_dbg_p3p, vha, 0xb013,
                            "Unrecognized interrupt type (%d).\n",
                            stat * 0xff);
                        break;
                }
                wrt_reg_dword(&reg->host_int, 0);
        }
out:
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

void
qla82xx_enable_intrs(struct qla_hw_data *ha)
{
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        qla82xx_mbx_intr_enable(vha);
        spin_lock_irq(&ha->hardware_lock);
        if (IS_QLA8044(ha))
                qla8044_wr_reg(ha, LEG_INTR_MASK_OFFSET, 0);
        else
                qla82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
        spin_unlock_irq(&ha->hardware_lock);
        ha->interrupts_on = 1;
}

void
qla82xx_disable_intrs(struct qla_hw_data *ha)
{
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        if (ha->interrupts_on)
                qla82xx_mbx_intr_disable(vha);

        spin_lock_irq(&ha->hardware_lock);
        if (IS_QLA8044(ha))
                qla8044_wr_reg(ha, LEG_INTR_MASK_OFFSET, 1);
        else
                qla82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0x0400);
        spin_unlock_irq(&ha->hardware_lock);
        ha->interrupts_on = 0;
}

void qla82xx_init_flags(struct qla_hw_data *ha)
{
        struct qla82xx_legacy_intr_set *nx_legacy_intr;

        /* ISP 8021 initializations */
        rwlock_init(&ha->hw_lock);
        ha->qdr_sn_window = -1;
        ha->ddr_mn_window = -1;
        ha->curr_window = 255;
        ha->portnum = PCI_FUNC(ha->pdev->devfn);
        nx_legacy_intr = &legacy_intr[ha->portnum];
        ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
        ha->nx_legacy_intr.tgt_status_reg = nx_legacy_intr->tgt_status_reg;
        ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
        ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
}

static inline void
qla82xx_set_idc_version(scsi_qla_host_t *vha)
{
        int idc_ver;
        uint32_t drv_active;
        struct qla_hw_data *ha = vha->hw;

        drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
        if (drv_active == (QLA82XX_DRV_ACTIVE << (ha->portnum * 4))) {
                qla82xx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
                    QLA82XX_IDC_VERSION);
                ql_log(ql_log_info, vha, 0xb082,
                    "IDC version updated to %d\n", QLA82XX_IDC_VERSION);
        } else {
                idc_ver = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_IDC_VERSION);
                if (idc_ver != QLA82XX_IDC_VERSION)
                        ql_log(ql_log_info, vha, 0xb083,
                            "qla2xxx driver IDC version %d is not compatible "
                            "with IDC version %d of the other drivers\n",
                            QLA82XX_IDC_VERSION, idc_ver);
        }
}

inline void
qla82xx_set_drv_active(scsi_qla_host_t *vha)
{
        uint32_t drv_active;
        struct qla_hw_data *ha = vha->hw;

        drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);

        /* If reset value is all FF's, initialize DRV_ACTIVE */
        if (drv_active == 0xffffffff) {
                qla82xx_wr_32(ha, QLA82XX_CRB_DRV_ACTIVE,
                        QLA82XX_DRV_NOT_ACTIVE);
                drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
        }
        drv_active |= (QLA82XX_DRV_ACTIVE << (ha->portnum * 4));
        qla82xx_wr_32(ha, QLA82XX_CRB_DRV_ACTIVE, drv_active);
}

inline void
qla82xx_clear_drv_active(struct qla_hw_data *ha)
{
        uint32_t drv_active;

        drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
        drv_active &= ~(QLA82XX_DRV_ACTIVE << (ha->portnum * 4));
        qla82xx_wr_32(ha, QLA82XX_CRB_DRV_ACTIVE, drv_active);
}

static inline int
qla82xx_need_reset(struct qla_hw_data *ha)
{
        uint32_t drv_state;
        int rval;

        if (ha->flags.nic_core_reset_owner)
                return 1;
        else {
                drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
                rval = drv_state & (QLA82XX_DRVST_RST_RDY << (ha->portnum * 4));
                return rval;
        }
}

static inline void
qla82xx_set_rst_ready(struct qla_hw_data *ha)
{
        uint32_t drv_state;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);

        /* If reset value is all FF's, initialize DRV_STATE */
        if (drv_state == 0xffffffff) {
                qla82xx_wr_32(ha, QLA82XX_CRB_DRV_STATE, QLA82XX_DRVST_NOT_RDY);
                drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
        }
        drv_state |= (QLA82XX_DRVST_RST_RDY << (ha->portnum * 4));
        ql_dbg(ql_dbg_init, vha, 0x00bb,
            "drv_state = 0x%08x.\n", drv_state);
        qla82xx_wr_32(ha, QLA82XX_CRB_DRV_STATE, drv_state);
}

static inline void
qla82xx_clear_rst_ready(struct qla_hw_data *ha)
{
        uint32_t drv_state;

        drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
        drv_state &= ~(QLA82XX_DRVST_RST_RDY << (ha->portnum * 4));
        qla82xx_wr_32(ha, QLA82XX_CRB_DRV_STATE, drv_state);
}

static inline void
qla82xx_set_qsnt_ready(struct qla_hw_data *ha)
{
        uint32_t qsnt_state;

        qsnt_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
        qsnt_state |= (QLA82XX_DRVST_QSNT_RDY << (ha->portnum * 4));
        qla82xx_wr_32(ha, QLA82XX_CRB_DRV_STATE, qsnt_state);
}

void
qla82xx_clear_qsnt_ready(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t qsnt_state;

        qsnt_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
        qsnt_state &= ~(QLA82XX_DRVST_QSNT_RDY << (ha->portnum * 4));
        qla82xx_wr_32(ha, QLA82XX_CRB_DRV_STATE, qsnt_state);
}

static int
qla82xx_load_fw(scsi_qla_host_t *vha)
{
        int rst;
        struct fw_blob *blob;
        struct qla_hw_data *ha = vha->hw;

        if (qla82xx_pinit_from_rom(vha) != QLA_SUCCESS) {
                ql_log(ql_log_fatal, vha, 0x009f,
                    "Error during CRB initialization.\n");
                return QLA_FUNCTION_FAILED;
        }
        udelay(500);

        /* Bring QM and CAMRAM out of reset */
        rst = qla82xx_rd_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET);
        rst &= ~((1 << 28) | (1 << 24));
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_GLB_SW_RESET, rst);

        /*
         * FW Load priority:
         * 1) Operational firmware residing in flash.
         * 2) Firmware via request-firmware interface (.bin file).
         */
        if (ql2xfwloadbin == 2)
                goto try_blob_fw;

        ql_log(ql_log_info, vha, 0x00a0,
            "Attempting to load firmware from flash.\n");

        if (qla82xx_fw_load_from_flash(ha) == QLA_SUCCESS) {
                ql_log(ql_log_info, vha, 0x00a1,
                    "Firmware loaded successfully from flash.\n");
                return QLA_SUCCESS;
        } else {
                ql_log(ql_log_warn, vha, 0x0108,
                    "Firmware load from flash failed.\n");
        }

try_blob_fw:
        ql_log(ql_log_info, vha, 0x00a2,
            "Attempting to load firmware from blob.\n");

        /* Load firmware blob. */
        blob = ha->hablob = qla2x00_request_firmware(vha);
        if (!blob) {
                ql_log(ql_log_fatal, vha, 0x00a3,
                    "Firmware image not present.\n");
                goto fw_load_failed;
        }

        /* Validating firmware blob */
        if (qla82xx_validate_firmware_blob(vha,
                QLA82XX_FLASH_ROMIMAGE)) {
                /* Fallback to URI format */
                if (qla82xx_validate_firmware_blob(vha,
                        QLA82XX_UNIFIED_ROMIMAGE)) {
                        ql_log(ql_log_fatal, vha, 0x00a4,
                            "No valid firmware image found.\n");
                        return QLA_FUNCTION_FAILED;
                }
        }

        if (qla82xx_fw_load_from_blob(ha) == QLA_SUCCESS) {
                ql_log(ql_log_info, vha, 0x00a5,
                    "Firmware loaded successfully from binary blob.\n");
                return QLA_SUCCESS;
        }

        ql_log(ql_log_fatal, vha, 0x00a6,
               "Firmware load failed for binary blob.\n");
        blob->fw = NULL;
        blob = NULL;

fw_load_failed:
        return QLA_FUNCTION_FAILED;
}

int
qla82xx_start_firmware(scsi_qla_host_t *vha)
{
        uint16_t      lnk;
        struct qla_hw_data *ha = vha->hw;

        /* scrub dma mask expansion register */
        qla82xx_wr_32(ha, CRB_DMA_SHIFT, QLA82XX_DMA_SHIFT_VALUE);

        /* Put both the PEG CMD and RCV PEG to default state
         * of 0 before resetting the hardware
         */
        qla82xx_wr_32(ha, CRB_CMDPEG_STATE, 0);
        qla82xx_wr_32(ha, CRB_RCVPEG_STATE, 0);

        /* Overwrite stale initialization register values */
        qla82xx_wr_32(ha, QLA82XX_PEG_HALT_STATUS1, 0);
        qla82xx_wr_32(ha, QLA82XX_PEG_HALT_STATUS2, 0);

        if (qla82xx_load_fw(vha) != QLA_SUCCESS) {
                ql_log(ql_log_fatal, vha, 0x00a7,
                    "Error trying to start fw.\n");
                return QLA_FUNCTION_FAILED;
        }

        /* Handshake with the card before we register the devices. */
        if (qla82xx_check_cmdpeg_state(ha) != QLA_SUCCESS) {
                ql_log(ql_log_fatal, vha, 0x00aa,
                    "Error during card handshake.\n");
                return QLA_FUNCTION_FAILED;
        }

        /* Negotiated Link width */
        pcie_capability_read_word(ha->pdev, PCI_EXP_LNKSTA, &lnk);
        ha->link_width = (lnk >> 4) & 0x3f;

        /* Synchronize with Receive peg */
        return qla82xx_check_rcvpeg_state(ha);
}

static __le32 *
qla82xx_read_flash_data(scsi_qla_host_t *vha, __le32 *dwptr, uint32_t faddr,
        uint32_t length)
{
        uint32_t i;
        uint32_t val;
        struct qla_hw_data *ha = vha->hw;

        /* Dword reads to flash. */
        for (i = 0; i < length/4; i++, faddr += 4) {
                if (qla82xx_rom_fast_read(ha, faddr, &val)) {
                        ql_log(ql_log_warn, vha, 0x0106,
                            "Do ROM fast read failed.\n");
                        goto done_read;
                }
                dwptr[i] = cpu_to_le32(val);
        }
done_read:
        return dwptr;
}

static int
qla82xx_unprotect_flash(struct qla_hw_data *ha)
{
        int ret;
        uint32_t val;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        ret = ql82xx_rom_lock_d(ha);
        if (ret < 0) {
                ql_log(ql_log_warn, vha, 0xb014,
                    "ROM Lock failed.\n");
                return ret;
        }

        ret = qla82xx_read_status_reg(ha, &val);
        if (ret < 0)
                goto done_unprotect;

        val &= ~(BLOCK_PROTECT_BITS << 2);
        ret = qla82xx_write_status_reg(ha, val);
        if (ret < 0) {
                val |= (BLOCK_PROTECT_BITS << 2);
                qla82xx_write_status_reg(ha, val);
        }

        if (qla82xx_write_disable_flash(ha) != 0)
                ql_log(ql_log_warn, vha, 0xb015,
                    "Write disable failed.\n");

done_unprotect:
        qla82xx_rom_unlock(ha);
        return ret;
}

static int
qla82xx_protect_flash(struct qla_hw_data *ha)
{
        int ret;
        uint32_t val;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        ret = ql82xx_rom_lock_d(ha);
        if (ret < 0) {
                ql_log(ql_log_warn, vha, 0xb016,
                    "ROM Lock failed.\n");
                return ret;
        }

        ret = qla82xx_read_status_reg(ha, &val);
        if (ret < 0)
                goto done_protect;

        val |= (BLOCK_PROTECT_BITS << 2);
        /* LOCK all sectors */
        ret = qla82xx_write_status_reg(ha, val);
        if (ret < 0)
                ql_log(ql_log_warn, vha, 0xb017,
                    "Write status register failed.\n");

        if (qla82xx_write_disable_flash(ha) != 0)
                ql_log(ql_log_warn, vha, 0xb018,
                    "Write disable failed.\n");
done_protect:
        qla82xx_rom_unlock(ha);
        return ret;
}

static int
qla82xx_erase_sector(struct qla_hw_data *ha, int addr)
{
        int ret = 0;
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);

        ret = ql82xx_rom_lock_d(ha);
        if (ret < 0) {
                ql_log(ql_log_warn, vha, 0xb019,
                    "ROM Lock failed.\n");
                return ret;
        }

        qla82xx_flash_set_write_enable(ha);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_ADDRESS, addr);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_ABYTE_CNT, 3);
        qla82xx_wr_32(ha, QLA82XX_ROMUSB_ROM_INSTR_OPCODE, M25P_INSTR_SE);

        if (qla82xx_wait_rom_done(ha)) {
                ql_log(ql_log_warn, vha, 0xb01a,
                    "Error waiting for rom done.\n");
                ret = -1;
                goto done;
        }
        ret = qla82xx_flash_wait_write_finish(ha);
done:
        qla82xx_rom_unlock(ha);
        return ret;
}

/*
 * Address and length are byte address
 */
void *
qla82xx_read_optrom_data(struct scsi_qla_host *vha, void *buf,
        uint32_t offset, uint32_t length)
{
        scsi_block_requests(vha->host);
        qla82xx_read_flash_data(vha, buf, offset, length);
        scsi_unblock_requests(vha->host);
        return buf;
}

static int
qla82xx_write_flash_data(struct scsi_qla_host *vha, __le32 *dwptr,
        uint32_t faddr, uint32_t dwords)
{
        int ret;
        uint32_t liter;
        uint32_t rest_addr;
        dma_addr_t optrom_dma;
        void *optrom = NULL;
        int page_mode = 0;
        struct qla_hw_data *ha = vha->hw;

        ret = -1;

        /* Prepare burst-capable write on supported ISPs. */
        if (page_mode && !(faddr & 0xfff) &&
            dwords > OPTROM_BURST_DWORDS) {
                optrom = dma_alloc_coherent(&ha->pdev->dev, OPTROM_BURST_SIZE,
                    &optrom_dma, GFP_KERNEL);
                if (!optrom) {
                        ql_log(ql_log_warn, vha, 0xb01b,
                            "Unable to allocate memory "
                            "for optrom burst write (%x KB).\n",
                            OPTROM_BURST_SIZE / 1024);
                }
        }

        rest_addr = ha->fdt_block_size - 1;

        ret = qla82xx_unprotect_flash(ha);
        if (ret) {
                ql_log(ql_log_warn, vha, 0xb01c,
                    "Unable to unprotect flash for update.\n");
                goto write_done;
        }

        for (liter = 0; liter < dwords; liter++, faddr += 4, dwptr++) {
                /* Are we at the beginning of a sector? */
                if ((faddr & rest_addr) == 0) {

                        ret = qla82xx_erase_sector(ha, faddr);
                        if (ret) {
                                ql_log(ql_log_warn, vha, 0xb01d,
                                    "Unable to erase sector: address=%x.\n",
                                    faddr);
                                break;
                        }
                }

                /* Go with burst-write. */
                if (optrom && (liter + OPTROM_BURST_DWORDS) <= dwords) {
                        /* Copy data to DMA'ble buffer. */
                        memcpy(optrom, dwptr, OPTROM_BURST_SIZE);

                        ret = qla2x00_load_ram(vha, optrom_dma,
                            (ha->flash_data_off | faddr),
                            OPTROM_BURST_DWORDS);
                        if (ret != QLA_SUCCESS) {
                                ql_log(ql_log_warn, vha, 0xb01e,
                                    "Unable to burst-write optrom segment "
                                    "(%x/%x/%llx).\n", ret,
                                    (ha->flash_data_off | faddr),
                                    (unsigned long long)optrom_dma);
                                ql_log(ql_log_warn, vha, 0xb01f,
                                    "Reverting to slow-write.\n");

                                dma_free_coherent(&ha->pdev->dev,
                                    OPTROM_BURST_SIZE, optrom, optrom_dma);
                                optrom = NULL;
                        } else {
                                liter += OPTROM_BURST_DWORDS - 1;
                                faddr += OPTROM_BURST_DWORDS - 1;
                                dwptr += OPTROM_BURST_DWORDS - 1;
                                continue;
                        }
                }

                ret = qla82xx_write_flash_dword(ha, faddr,
                                                le32_to_cpu(*dwptr));
                if (ret) {
                        ql_dbg(ql_dbg_p3p, vha, 0xb020,
                            "Unable to program flash address=%x data=%x.\n",
                            faddr, *dwptr);
                        break;
                }
        }

        ret = qla82xx_protect_flash(ha);
        if (ret)
                ql_log(ql_log_warn, vha, 0xb021,
                    "Unable to protect flash after update.\n");
write_done:
        if (optrom)
                dma_free_coherent(&ha->pdev->dev,
                    OPTROM_BURST_SIZE, optrom, optrom_dma);
        return ret;
}

int
qla82xx_write_optrom_data(struct scsi_qla_host *vha, void *buf,
        uint32_t offset, uint32_t length)
{
        int rval;

        /* Suspend HBA. */
        scsi_block_requests(vha->host);
        rval = qla82xx_write_flash_data(vha, buf, offset, length >> 2);
        scsi_unblock_requests(vha->host);

        /* Convert return ISP82xx to generic */
        if (rval)
                rval = QLA_FUNCTION_FAILED;
        else
                rval = QLA_SUCCESS;
        return rval;
}

void
qla82xx_start_iocbs(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        struct req_que *req = ha->req_q_map[0];
        uint32_t dbval;

        /* Adjust ring index. */
        req->ring_index++;
        if (req->ring_index == req->length) {
                req->ring_index = 0;
                req->ring_ptr = req->ring;
        } else
                req->ring_ptr++;

        dbval = 0x04 | (ha->portnum << 5);

        dbval = dbval | (req->id << 8) | (req->ring_index << 16);
        if (ql2xdbwr)
                qla82xx_wr_32(ha, (unsigned long)ha->nxdb_wr_ptr, dbval);
        else {
                wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
                wmb();
                while (rd_reg_dword(ha->nxdb_rd_ptr) != dbval) {
                        wrt_reg_dword(ha->nxdb_wr_ptr, dbval);
                        wmb();
                }
        }
}

static void
qla82xx_rom_lock_recovery(struct qla_hw_data *ha)
{
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
        uint32_t lock_owner = 0;

        if (qla82xx_rom_lock(ha)) {
                lock_owner = qla82xx_rd_32(ha, QLA82XX_ROM_LOCK_ID);
                /* Someone else is holding the lock. */
                ql_log(ql_log_info, vha, 0xb022,
                    "Resetting rom_lock, Lock Owner %u.\n", lock_owner);
        }
        /*
         * Either we got the lock, or someone
         * else died while holding it.
         * In either case, unlock.
         */
        qla82xx_rom_unlock(ha);
}

/*
 * qla82xx_device_bootstrap
 *    Initialize device, set DEV_READY, start fw
 *
 * Note:
 *      IDC lock must be held upon entry
 *
 * Return:
 *    Success : 0
 *    Failed  : 1
 */
static int
qla82xx_device_bootstrap(scsi_qla_host_t *vha)
{
        int rval = QLA_SUCCESS;
        int i;
        uint32_t old_count, count;
        struct qla_hw_data *ha = vha->hw;
        int need_reset = 0;

        need_reset = qla82xx_need_reset(ha);

        if (need_reset) {
                /* We are trying to perform a recovery here. */
                if (ha->flags.isp82xx_fw_hung)
                        qla82xx_rom_lock_recovery(ha);
        } else  {
                old_count = qla82xx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
                for (i = 0; i < 10; i++) {
                        msleep(200);
                        count = qla82xx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
                        if (count != old_count) {
                                rval = QLA_SUCCESS;
                                goto dev_ready;
                        }
                }
                qla82xx_rom_lock_recovery(ha);
        }

        /* set to DEV_INITIALIZING */
        ql_log(ql_log_info, vha, 0x009e,
            "HW State: INITIALIZING.\n");
        qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE, QLA8XXX_DEV_INITIALIZING);

        qla82xx_idc_unlock(ha);
        rval = qla82xx_start_firmware(vha);
        qla82xx_idc_lock(ha);

        if (rval != QLA_SUCCESS) {
                ql_log(ql_log_fatal, vha, 0x00ad,
                    "HW State: FAILED.\n");
                qla82xx_clear_drv_active(ha);
                qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE, QLA8XXX_DEV_FAILED);
                return rval;
        }

dev_ready:
        ql_log(ql_log_info, vha, 0x00ae,
            "HW State: READY.\n");
        qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE, QLA8XXX_DEV_READY);

        return QLA_SUCCESS;
}

/*
* qla82xx_need_qsnt_handler
*    Code to start quiescence sequence
*
* Note:
*      IDC lock must be held upon entry
*
* Return: void
*/

static void
qla82xx_need_qsnt_handler(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t dev_state, drv_state, drv_active;
        unsigned long reset_timeout;

        if (vha->flags.online) {
                /*Block any further I/O and wait for pending cmnds to complete*/
                qla2x00_quiesce_io(vha);
        }

        /* Set the quiescence ready bit */
        qla82xx_set_qsnt_ready(ha);

        /*wait for 30 secs for other functions to ack */
        reset_timeout = jiffies + (30 * HZ);

        drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
        drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
        /* Its 2 that is written when qsnt is acked, moving one bit */
        drv_active = drv_active << 0x01;

        while (drv_state != drv_active) {

                if (time_after_eq(jiffies, reset_timeout)) {
                        /* quiescence timeout, other functions didn't ack
                         * changing the state to DEV_READY
                         */
                        ql_log(ql_log_info, vha, 0xb023,
                            "%s : QUIESCENT TIMEOUT DRV_ACTIVE:%d "
                            "DRV_STATE:%d.\n", QLA2XXX_DRIVER_NAME,
                            drv_active, drv_state);
                        qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
                            QLA8XXX_DEV_READY);
                        ql_log(ql_log_info, vha, 0xb025,
                            "HW State: DEV_READY.\n");
                        qla82xx_idc_unlock(ha);
                        qla2x00_perform_loop_resync(vha);
                        qla82xx_idc_lock(ha);

                        qla82xx_clear_qsnt_ready(vha);
                        return;
                }

                qla82xx_idc_unlock(ha);
                msleep(1000);
                qla82xx_idc_lock(ha);

                drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
                drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
                drv_active = drv_active << 0x01;
        }
        dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
        /* everyone acked so set the state to DEV_QUIESCENCE */
        if (dev_state == QLA8XXX_DEV_NEED_QUIESCENT) {
                ql_log(ql_log_info, vha, 0xb026,
                    "HW State: DEV_QUIESCENT.\n");
                qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE, QLA8XXX_DEV_QUIESCENT);
        }
}

void
qla8xxx_dev_failed_handler(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;

        /* Disable the board */
        ql_log(ql_log_fatal, vha, 0x00b8,
            "Disabling the board.\n");

        if (IS_QLA82XX(ha)) {
                qla82xx_clear_drv_active(ha);
                qla82xx_idc_unlock(ha);
        } else if (IS_QLA8044(ha)) {
                qla8044_clear_drv_active(ha);
                qla8044_idc_unlock(ha);
        }

        /* Set DEV_FAILED flag to disable timer */
        vha->device_flags |= DFLG_DEV_FAILED;
        qla2x00_abort_all_cmds(vha, DID_NO_CONNECT << 16);
        qla2x00_mark_all_devices_lost(vha);
        vha->flags.online = 0;
        vha->flags.init_done = 0;
}

/*
 * qla82xx_need_reset_handler
 *    Code to start reset sequence
 *
 * Note:
 *      IDC lock must be held upon entry
 *
 * Return:
 *    Success : 0
 *    Failed  : 1
 */
static void
qla82xx_need_reset_handler(scsi_qla_host_t *vha)
{
        uint32_t dev_state, drv_state, drv_active;
        uint32_t active_mask = 0;
        unsigned long reset_timeout;
        struct qla_hw_data *ha = vha->hw;
        struct req_que *req = ha->req_q_map[0];

        if (vha->flags.online) {
                qla82xx_idc_unlock(ha);
                qla2x00_abort_isp_cleanup(vha);
                ha->isp_ops->get_flash_version(vha, req->ring);
                ha->isp_ops->nvram_config(vha);
                qla82xx_idc_lock(ha);
        }

        drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
        if (!ha->flags.nic_core_reset_owner) {
                ql_dbg(ql_dbg_p3p, vha, 0xb028,
                    "reset_acknowledged by 0x%x\n", ha->portnum);
                qla82xx_set_rst_ready(ha);
        } else {
                active_mask = ~(QLA82XX_DRV_ACTIVE << (ha->portnum * 4));
                drv_active &= active_mask;
                ql_dbg(ql_dbg_p3p, vha, 0xb029,
                    "active_mask: 0x%08x\n", active_mask);
        }

        /* wait for 10 seconds for reset ack from all functions */
        reset_timeout = jiffies + (ha->fcoe_reset_timeout * HZ);

        drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
        drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
        dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);

        ql_dbg(ql_dbg_p3p, vha, 0xb02a,
            "drv_state: 0x%08x, drv_active: 0x%08x, "
            "dev_state: 0x%08x, active_mask: 0x%08x\n",
            drv_state, drv_active, dev_state, active_mask);

        while (drv_state != drv_active &&
            dev_state != QLA8XXX_DEV_INITIALIZING) {
                if (time_after_eq(jiffies, reset_timeout)) {
                        ql_log(ql_log_warn, vha, 0x00b5,
                            "Reset timeout.\n");
                        break;
                }
                qla82xx_idc_unlock(ha);
                msleep(1000);
                qla82xx_idc_lock(ha);
                drv_state = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_STATE);
                drv_active = qla82xx_rd_32(ha, QLA82XX_CRB_DRV_ACTIVE);
                if (ha->flags.nic_core_reset_owner)
                        drv_active &= active_mask;
                dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
        }

        ql_dbg(ql_dbg_p3p, vha, 0xb02b,
            "drv_state: 0x%08x, drv_active: 0x%08x, "
            "dev_state: 0x%08x, active_mask: 0x%08x\n",
            drv_state, drv_active, dev_state, active_mask);

        ql_log(ql_log_info, vha, 0x00b6,
            "Device state is 0x%x = %s.\n",
            dev_state, qdev_state(dev_state));

        /* Force to DEV_COLD unless someone else is starting a reset */
        if (dev_state != QLA8XXX_DEV_INITIALIZING &&
            dev_state != QLA8XXX_DEV_COLD) {
                ql_log(ql_log_info, vha, 0x00b7,
                    "HW State: COLD/RE-INIT.\n");
                qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE, QLA8XXX_DEV_COLD);
                qla82xx_set_rst_ready(ha);
                if (ql2xmdenable) {
                        if (qla82xx_md_collect(vha))
                                ql_log(ql_log_warn, vha, 0xb02c,
                                    "Minidump not collected.\n");
                } else
                        ql_log(ql_log_warn, vha, 0xb04f,
                            "Minidump disabled.\n");
        }
}

int
qla82xx_check_md_needed(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        uint16_t fw_major_version, fw_minor_version, fw_subminor_version;
        int rval = QLA_SUCCESS;

        fw_major_version = ha->fw_major_version;
        fw_minor_version = ha->fw_minor_version;
        fw_subminor_version = ha->fw_subminor_version;

        rval = qla2x00_get_fw_version(vha);
        if (rval != QLA_SUCCESS)
                return rval;

        if (ql2xmdenable) {
                if (!ha->fw_dumped) {
                        if ((fw_major_version != ha->fw_major_version ||
                            fw_minor_version != ha->fw_minor_version ||
                            fw_subminor_version != ha->fw_subminor_version) ||
                            (ha->prev_minidump_failed)) {
                                ql_dbg(ql_dbg_p3p, vha, 0xb02d,
                                    "Firmware version differs Previous version: %d:%d:%d - New version: %d:%d:%d, prev_minidump_failed: %d.\n",
                                    fw_major_version, fw_minor_version,
                                    fw_subminor_version,
                                    ha->fw_major_version,
                                    ha->fw_minor_version,
                                    ha->fw_subminor_version,
                                    ha->prev_minidump_failed);
                                /* Release MiniDump resources */
                                qla82xx_md_free(vha);
                                /* ALlocate MiniDump resources */
                                qla82xx_md_prep(vha);
                        }
                } else
                        ql_log(ql_log_info, vha, 0xb02e,
                            "Firmware dump available to retrieve\n");
        }
        return rval;
}


static int
qla82xx_check_fw_alive(scsi_qla_host_t *vha)
{
        uint32_t fw_heartbeat_counter;
        int status = 0;

        fw_heartbeat_counter = qla82xx_rd_32(vha->hw,
                QLA82XX_PEG_ALIVE_COUNTER);
        /* all 0xff, assume AER/EEH in progress, ignore */
        if (fw_heartbeat_counter == 0xffffffff) {
                ql_dbg(ql_dbg_timer, vha, 0x6003,
                    "FW heartbeat counter is 0xffffffff, "
                    "returning status=%d.\n", status);
                return status;
        }
        if (vha->fw_heartbeat_counter == fw_heartbeat_counter) {
                vha->seconds_since_last_heartbeat++;
                /* FW not alive after 2 seconds */
                if (vha->seconds_since_last_heartbeat == 2) {
                        vha->seconds_since_last_heartbeat = 0;
                        status = 1;
                }
        } else
                vha->seconds_since_last_heartbeat = 0;
        vha->fw_heartbeat_counter = fw_heartbeat_counter;
        if (status)
                ql_dbg(ql_dbg_timer, vha, 0x6004,
                    "Returning status=%d.\n", status);
        return status;
}

/*
 * qla82xx_device_state_handler
 *      Main state handler
 *
 * Note:
 *      IDC lock must be held upon entry
 *
 * Return:
 *    Success : 0
 *    Failed  : 1
 */
int
qla82xx_device_state_handler(scsi_qla_host_t *vha)
{
        uint32_t dev_state;
        uint32_t old_dev_state;
        int rval = QLA_SUCCESS;
        unsigned long dev_init_timeout;
        struct qla_hw_data *ha = vha->hw;
        int loopcount = 0;

        qla82xx_idc_lock(ha);
        if (!vha->flags.init_done) {
                qla82xx_set_drv_active(vha);
                qla82xx_set_idc_version(vha);
        }

        dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
        old_dev_state = dev_state;
        ql_log(ql_log_info, vha, 0x009b,
            "Device state is 0x%x = %s.\n",
            dev_state, qdev_state(dev_state));

        /* wait for 30 seconds for device to go ready */
        dev_init_timeout = jiffies + (ha->fcoe_dev_init_timeout * HZ);

        while (1) {

                if (time_after_eq(jiffies, dev_init_timeout)) {
                        ql_log(ql_log_fatal, vha, 0x009c,
                            "Device init failed.\n");
                        rval = QLA_FUNCTION_FAILED;
                        break;
                }
                dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
                if (old_dev_state != dev_state) {
                        loopcount = 0;
                        old_dev_state = dev_state;
                }
                if (loopcount < 5) {
                        ql_log(ql_log_info, vha, 0x009d,
                            "Device state is 0x%x = %s.\n",
                            dev_state, qdev_state(dev_state));
                }

                switch (dev_state) {
                case QLA8XXX_DEV_READY:
                        ha->flags.nic_core_reset_owner = 0;
                        goto rel_lock;
                case QLA8XXX_DEV_COLD:
                        rval = qla82xx_device_bootstrap(vha);
                        break;
                case QLA8XXX_DEV_INITIALIZING:
                        qla82xx_idc_unlock(ha);
                        msleep(1000);
                        qla82xx_idc_lock(ha);
                        break;
                case QLA8XXX_DEV_NEED_RESET:
                        if (!ql2xdontresethba)
                                qla82xx_need_reset_handler(vha);
                        else {
                                qla82xx_idc_unlock(ha);
                                msleep(1000);
                                qla82xx_idc_lock(ha);
                        }
                        dev_init_timeout = jiffies +
                            (ha->fcoe_dev_init_timeout * HZ);
                        break;
                case QLA8XXX_DEV_NEED_QUIESCENT:
                        qla82xx_need_qsnt_handler(vha);
                        /* Reset timeout value after quiescence handler */
                        dev_init_timeout = jiffies + (ha->fcoe_dev_init_timeout
                                                         * HZ);
                        break;
                case QLA8XXX_DEV_QUIESCENT:
                        /* Owner will exit and other will wait for the state
                         * to get changed
                         */
                        if (ha->flags.quiesce_owner)
                                goto rel_lock;

                        qla82xx_idc_unlock(ha);
                        msleep(1000);
                        qla82xx_idc_lock(ha);

                        /* Reset timeout value after quiescence handler */
                        dev_init_timeout = jiffies + (ha->fcoe_dev_init_timeout
                                                         * HZ);
                        break;
                case QLA8XXX_DEV_FAILED:
                        qla8xxx_dev_failed_handler(vha);
                        rval = QLA_FUNCTION_FAILED;
                        goto exit;
                default:
                        qla82xx_idc_unlock(ha);
                        msleep(1000);
                        qla82xx_idc_lock(ha);
                }
                loopcount++;
        }
rel_lock:
        qla82xx_idc_unlock(ha);
exit:
        return rval;
}

static int qla82xx_check_temp(scsi_qla_host_t *vha)
{
        uint32_t temp, temp_state, temp_val;
        struct qla_hw_data *ha = vha->hw;

        temp = qla82xx_rd_32(ha, CRB_TEMP_STATE);
        temp_state = qla82xx_get_temp_state(temp);
        temp_val = qla82xx_get_temp_val(temp);

        if (temp_state == QLA82XX_TEMP_PANIC) {
                ql_log(ql_log_warn, vha, 0x600e,
                    "Device temperature %d degrees C exceeds "
                    " maximum allowed. Hardware has been shut down.\n",
                    temp_val);
                return 1;
        } else if (temp_state == QLA82XX_TEMP_WARN) {
                ql_log(ql_log_warn, vha, 0x600f,
                    "Device temperature %d degrees C exceeds "
                    "operating range. Immediate action needed.\n",
                    temp_val);
        }
        return 0;
}

int qla82xx_read_temperature(scsi_qla_host_t *vha)
{
        uint32_t temp;

        temp = qla82xx_rd_32(vha->hw, CRB_TEMP_STATE);
        return qla82xx_get_temp_val(temp);
}

void qla82xx_clear_pending_mbx(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;

        if (ha->flags.mbox_busy) {
                ha->flags.mbox_int = 1;
                ha->flags.mbox_busy = 0;
                ql_log(ql_log_warn, vha, 0x6010,
                    "Doing premature completion of mbx command.\n");
                if (test_and_clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags))
                        complete(&ha->mbx_intr_comp);
        }
}

void qla82xx_watchdog(scsi_qla_host_t *vha)
{
        uint32_t dev_state, halt_status;
        struct qla_hw_data *ha = vha->hw;

        /* don't poll if reset is going on */
        if (!ha->flags.nic_core_reset_hdlr_active) {
                dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
                if (qla82xx_check_temp(vha)) {
                        set_bit(ISP_UNRECOVERABLE, &vha->dpc_flags);
                        ha->flags.isp82xx_fw_hung = 1;
                        qla82xx_clear_pending_mbx(vha);
                } else if (dev_state == QLA8XXX_DEV_NEED_RESET &&
                    !test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags)) {
                        ql_log(ql_log_warn, vha, 0x6001,
                            "Adapter reset needed.\n");
                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                } else if (dev_state == QLA8XXX_DEV_NEED_QUIESCENT &&
                        !test_bit(ISP_QUIESCE_NEEDED, &vha->dpc_flags)) {
                        ql_log(ql_log_warn, vha, 0x6002,
                            "Quiescent needed.\n");
                        set_bit(ISP_QUIESCE_NEEDED, &vha->dpc_flags);
                } else if (dev_state == QLA8XXX_DEV_FAILED &&
                        !test_bit(ISP_UNRECOVERABLE, &vha->dpc_flags) &&
                        vha->flags.online == 1) {
                        ql_log(ql_log_warn, vha, 0xb055,
                            "Adapter state is failed. Offlining.\n");
                        set_bit(ISP_UNRECOVERABLE, &vha->dpc_flags);
                        ha->flags.isp82xx_fw_hung = 1;
                        qla82xx_clear_pending_mbx(vha);
                } else {
                        if (qla82xx_check_fw_alive(vha)) {
                                ql_dbg(ql_dbg_timer, vha, 0x6011,
                                    "disabling pause transmit on port 0 & 1.\n");
                                qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0x98,
                                    CRB_NIU_XG_PAUSE_CTL_P0|CRB_NIU_XG_PAUSE_CTL_P1);
                                halt_status = qla82xx_rd_32(ha,
                                    QLA82XX_PEG_HALT_STATUS1);
                                ql_log(ql_log_info, vha, 0x6005,
                                    "dumping hw/fw registers:.\n "
                                    " PEG_HALT_STATUS1: 0x%x, PEG_HALT_STATUS2: 0x%x,.\n "
                                    " PEG_NET_0_PC: 0x%x, PEG_NET_1_PC: 0x%x,.\n "
                                    " PEG_NET_2_PC: 0x%x, PEG_NET_3_PC: 0x%x,.\n "
                                    " PEG_NET_4_PC: 0x%x.\n", halt_status,
                                    qla82xx_rd_32(ha, QLA82XX_PEG_HALT_STATUS2),
                                    qla82xx_rd_32(ha,
                                            QLA82XX_CRB_PEG_NET_0 + 0x3c),
                                    qla82xx_rd_32(ha,
                                            QLA82XX_CRB_PEG_NET_1 + 0x3c),
                                    qla82xx_rd_32(ha,
                                            QLA82XX_CRB_PEG_NET_2 + 0x3c),
                                    qla82xx_rd_32(ha,
                                            QLA82XX_CRB_PEG_NET_3 + 0x3c),
                                    qla82xx_rd_32(ha,
                                            QLA82XX_CRB_PEG_NET_4 + 0x3c));
                                if (((halt_status & 0x1fffff00) >> 8) == 0x67)
                                        ql_log(ql_log_warn, vha, 0xb052,
                                            "Firmware aborted with "
                                            "error code 0x00006700. Device is "
                                            "being reset.\n");
                                if (halt_status & HALT_STATUS_UNRECOVERABLE) {
                                        set_bit(ISP_UNRECOVERABLE,
                                            &vha->dpc_flags);
                                } else {
                                        ql_log(ql_log_info, vha, 0x6006,
                                            "Detect abort  needed.\n");
                                        set_bit(ISP_ABORT_NEEDED,
                                            &vha->dpc_flags);
                                }
                                ha->flags.isp82xx_fw_hung = 1;
                                ql_log(ql_log_warn, vha, 0x6007, "Firmware hung.\n");
                                qla82xx_clear_pending_mbx(vha);
                        }
                }
        }
}

int qla82xx_load_risc(scsi_qla_host_t *vha, uint32_t *srisc_addr)
{
        int rval = -1;
        struct qla_hw_data *ha = vha->hw;

        if (IS_QLA82XX(ha))
                rval = qla82xx_device_state_handler(vha);
        else if (IS_QLA8044(ha)) {
                qla8044_idc_lock(ha);
                /* Decide the reset ownership */
                qla83xx_reset_ownership(vha);
                qla8044_idc_unlock(ha);
                rval = qla8044_device_state_handler(vha);
        }
        return rval;
}

void
qla82xx_set_reset_owner(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t dev_state = 0;

        if (IS_QLA82XX(ha))
                dev_state = qla82xx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
        else if (IS_QLA8044(ha))
                dev_state = qla8044_rd_direct(vha, QLA8044_CRB_DEV_STATE_INDEX);

        if (dev_state == QLA8XXX_DEV_READY) {
                ql_log(ql_log_info, vha, 0xb02f,
                    "HW State: NEED RESET\n");
                if (IS_QLA82XX(ha)) {
                        qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
                            QLA8XXX_DEV_NEED_RESET);
                        ha->flags.nic_core_reset_owner = 1;
                        ql_dbg(ql_dbg_p3p, vha, 0xb030,
                            "reset_owner is 0x%x\n", ha->portnum);
                } else if (IS_QLA8044(ha))
                        qla8044_wr_direct(vha, QLA8044_CRB_DEV_STATE_INDEX,
                            QLA8XXX_DEV_NEED_RESET);
        } else
                ql_log(ql_log_info, vha, 0xb031,
                    "Device state is 0x%x = %s.\n",
                    dev_state, qdev_state(dev_state));
}

/*
 *  qla82xx_abort_isp
 *      Resets ISP and aborts all outstanding commands.
 *
 * Input:
 *      ha           = adapter block pointer.
 *
 * Returns:
 *      0 = success
 */
int
qla82xx_abort_isp(scsi_qla_host_t *vha)
{
        int rval = -1;
        struct qla_hw_data *ha = vha->hw;

        if (vha->device_flags & DFLG_DEV_FAILED) {
                ql_log(ql_log_warn, vha, 0x8024,
                    "Device in failed state, exiting.\n");
                return QLA_SUCCESS;
        }
        ha->flags.nic_core_reset_hdlr_active = 1;

        qla82xx_idc_lock(ha);
        qla82xx_set_reset_owner(vha);
        qla82xx_idc_unlock(ha);

        if (IS_QLA82XX(ha))
                rval = qla82xx_device_state_handler(vha);
        else if (IS_QLA8044(ha)) {
                qla8044_idc_lock(ha);
                /* Decide the reset ownership */
                qla83xx_reset_ownership(vha);
                qla8044_idc_unlock(ha);
                rval = qla8044_device_state_handler(vha);
        }

        qla82xx_idc_lock(ha);
        qla82xx_clear_rst_ready(ha);
        qla82xx_idc_unlock(ha);

        if (rval == QLA_SUCCESS) {
                ha->flags.isp82xx_fw_hung = 0;
                ha->flags.nic_core_reset_hdlr_active = 0;
                qla82xx_restart_isp(vha);
        }

        if (rval) {
                vha->flags.online = 1;
                if (test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) {
                        if (ha->isp_abort_cnt == 0) {
                                ql_log(ql_log_warn, vha, 0x8027,
                                    "ISP error recover failed - board "
                                    "disabled.\n");
                                /*
                                 * The next call disables the board
                                 * completely.
                                 */
                                ha->isp_ops->reset_adapter(vha);
                                vha->flags.online = 0;
                                clear_bit(ISP_ABORT_RETRY,
                                    &vha->dpc_flags);
                                rval = QLA_SUCCESS;
                        } else { /* schedule another ISP abort */
                                ha->isp_abort_cnt--;
                                ql_log(ql_log_warn, vha, 0x8036,
                                    "ISP abort - retry remaining %d.\n",
                                    ha->isp_abort_cnt);
                                rval = QLA_FUNCTION_FAILED;
                        }
                } else {
                        ha->isp_abort_cnt = MAX_RETRIES_OF_ISP_ABORT;
                        ql_dbg(ql_dbg_taskm, vha, 0x8029,
                            "ISP error recovery - retrying (%d) more times.\n",
                            ha->isp_abort_cnt);
                        set_bit(ISP_ABORT_RETRY, &vha->dpc_flags);
                        rval = QLA_FUNCTION_FAILED;
                }
        }
        return rval;
}

/*
 *  qla82xx_fcoe_ctx_reset
 *      Perform a quick reset and aborts all outstanding commands.
 *      This will only perform an FCoE context reset and avoids a full blown
 *      chip reset.
 *
 * Input:
 *      ha = adapter block pointer.
 *      is_reset_path = flag for identifying the reset path.
 *
 * Returns:
 *      0 = success
 */
int qla82xx_fcoe_ctx_reset(scsi_qla_host_t *vha)
{
        int rval = QLA_FUNCTION_FAILED;

        if (vha->flags.online) {
                /* Abort all outstanding commands, so as to be requeued later */
                qla2x00_abort_isp_cleanup(vha);
        }

        /* Stop currently executing firmware.
         * This will destroy existing FCoE context at the F/W end.
         */
        qla2x00_try_to_stop_firmware(vha);

        /* Restart. Creates a new FCoE context on INIT_FIRMWARE. */
        rval = qla82xx_restart_isp(vha);

        return rval;
}

/*
 * qla2x00_wait_for_fcoe_ctx_reset
 *    Wait till the FCoE context is reset.
 *
 * Note:
 *    Does context switching here.
 *    Release SPIN_LOCK (if any) before calling this routine.
 *
 * Return:
 *    Success (fcoe_ctx reset is done) : 0
 *    Failed  (fcoe_ctx reset not completed within max loop timout ) : 1
 */
int qla2x00_wait_for_fcoe_ctx_reset(scsi_qla_host_t *vha)
{
        int status = QLA_FUNCTION_FAILED;
        unsigned long wait_reset;

        wait_reset = jiffies + (MAX_LOOP_TIMEOUT * HZ);
        while ((test_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags) ||
            test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
            && time_before(jiffies, wait_reset)) {

                set_current_state(TASK_UNINTERRUPTIBLE);
                schedule_timeout(HZ);

                if (!test_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags) &&
                    !test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags)) {
                        status = QLA_SUCCESS;
                        break;
                }
        }
        ql_dbg(ql_dbg_p3p, vha, 0xb027,
               "%s: status=%d.\n", __func__, status);

        return status;
}

void
qla82xx_chip_reset_cleanup(scsi_qla_host_t *vha)
{
        int i, fw_state = 0;
        unsigned long flags;
        struct qla_hw_data *ha = vha->hw;

        /* Check if 82XX firmware is alive or not
         * We may have arrived here from NEED_RESET
         * detection only
         */
        if (!ha->flags.isp82xx_fw_hung) {
                for (i = 0; i < 2; i++) {
                        msleep(1000);
                        if (IS_QLA82XX(ha))
                                fw_state = qla82xx_check_fw_alive(vha);
                        else if (IS_QLA8044(ha))
                                fw_state = qla8044_check_fw_alive(vha);
                        if (fw_state) {
                                ha->flags.isp82xx_fw_hung = 1;
                                qla82xx_clear_pending_mbx(vha);
                                break;
                        }
                }
        }
        ql_dbg(ql_dbg_init, vha, 0x00b0,
            "Entered %s fw_hung=%d.\n",
            __func__, ha->flags.isp82xx_fw_hung);

        /* Abort all commands gracefully if fw NOT hung */
        if (!ha->flags.isp82xx_fw_hung) {
                int cnt, que;
                srb_t *sp;
                struct req_que *req;

                spin_lock_irqsave(&ha->hardware_lock, flags);
                for (que = 0; que < ha->max_req_queues; que++) {
                        req = ha->req_q_map[que];
                        if (!req)
                                continue;
                        for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
                                sp = req->outstanding_cmds[cnt];
                                if (sp) {
                                        if ((!sp->u.scmd.crc_ctx ||
                                            (sp->flags &
                                                SRB_FCP_CMND_DMA_VALID)) &&
                                                !ha->flags.isp82xx_fw_hung) {
                                                spin_unlock_irqrestore(
                                                    &ha->hardware_lock, flags);
                                                if (ha->isp_ops->abort_command(sp)) {
                                                        ql_log(ql_log_info, vha,
                                                            0x00b1,
                                                            "mbx abort failed.\n");
                                                } else {
                                                        ql_log(ql_log_info, vha,
                                                            0x00b2,
                                                            "mbx abort success.\n");
                                                }
                                                spin_lock_irqsave(&ha->hardware_lock, flags);
                                        }
                                }
                        }
                }
                spin_unlock_irqrestore(&ha->hardware_lock, flags);

                /* Wait for pending cmds (physical and virtual) to complete */
                if (qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
                    WAIT_HOST) == QLA_SUCCESS) {
                        ql_dbg(ql_dbg_init, vha, 0x00b3,
                            "Done wait for "
                            "pending commands.\n");
                } else {
                        WARN_ON_ONCE(true);
                }
        }
}

/* Minidump related functions */
static int
qla82xx_minidump_process_control(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        struct qla82xx_md_entry_crb *crb_entry;
        uint32_t read_value, opcode, poll_time;
        uint32_t addr, index, crb_addr;
        unsigned long wtime;
        struct qla82xx_md_template_hdr *tmplt_hdr;
        uint32_t rval = QLA_SUCCESS;
        int i;

        tmplt_hdr = (struct qla82xx_md_template_hdr *)ha->md_tmplt_hdr;
        crb_entry = (struct qla82xx_md_entry_crb *)entry_hdr;
        crb_addr = crb_entry->addr;

        for (i = 0; i < crb_entry->op_count; i++) {
                opcode = crb_entry->crb_ctrl.opcode;
                if (opcode & QLA82XX_DBG_OPCODE_WR) {
                        qla82xx_md_rw_32(ha, crb_addr,
                            crb_entry->value_1, 1);
                        opcode &= ~QLA82XX_DBG_OPCODE_WR;
                }

                if (opcode & QLA82XX_DBG_OPCODE_RW) {
                        read_value = qla82xx_md_rw_32(ha, crb_addr, 0, 0);
                        qla82xx_md_rw_32(ha, crb_addr, read_value, 1);
                        opcode &= ~QLA82XX_DBG_OPCODE_RW;
                }

                if (opcode & QLA82XX_DBG_OPCODE_AND) {
                        read_value = qla82xx_md_rw_32(ha, crb_addr, 0, 0);
                        read_value &= crb_entry->value_2;
                        opcode &= ~QLA82XX_DBG_OPCODE_AND;
                        if (opcode & QLA82XX_DBG_OPCODE_OR) {
                                read_value |= crb_entry->value_3;
                                opcode &= ~QLA82XX_DBG_OPCODE_OR;
                        }
                        qla82xx_md_rw_32(ha, crb_addr, read_value, 1);
                }

                if (opcode & QLA82XX_DBG_OPCODE_OR) {
                        read_value = qla82xx_md_rw_32(ha, crb_addr, 0, 0);
                        read_value |= crb_entry->value_3;
                        qla82xx_md_rw_32(ha, crb_addr, read_value, 1);
                        opcode &= ~QLA82XX_DBG_OPCODE_OR;
                }

                if (opcode & QLA82XX_DBG_OPCODE_POLL) {
                        poll_time = crb_entry->crb_strd.poll_timeout;
                        wtime = jiffies + poll_time;
                        read_value = qla82xx_md_rw_32(ha, crb_addr, 0, 0);

                        do {
                                if ((read_value & crb_entry->value_2)
                                    == crb_entry->value_1)
                                        break;
                                else if (time_after_eq(jiffies, wtime)) {
                                        /* capturing dump failed */
                                        rval = QLA_FUNCTION_FAILED;
                                        break;
                                } else
                                        read_value = qla82xx_md_rw_32(ha,
                                            crb_addr, 0, 0);
                        } while (1);
                        opcode &= ~QLA82XX_DBG_OPCODE_POLL;
                }

                if (opcode & QLA82XX_DBG_OPCODE_RDSTATE) {
                        if (crb_entry->crb_strd.state_index_a) {
                                index = crb_entry->crb_strd.state_index_a;
                                addr = tmplt_hdr->saved_state_array[index];
                        } else
                                addr = crb_addr;

                        read_value = qla82xx_md_rw_32(ha, addr, 0, 0);
                        index = crb_entry->crb_ctrl.state_index_v;
                        tmplt_hdr->saved_state_array[index] = read_value;
                        opcode &= ~QLA82XX_DBG_OPCODE_RDSTATE;
                }

                if (opcode & QLA82XX_DBG_OPCODE_WRSTATE) {
                        if (crb_entry->crb_strd.state_index_a) {
                                index = crb_entry->crb_strd.state_index_a;
                                addr = tmplt_hdr->saved_state_array[index];
                        } else
                                addr = crb_addr;

                        if (crb_entry->crb_ctrl.state_index_v) {
                                index = crb_entry->crb_ctrl.state_index_v;
                                read_value =
                                    tmplt_hdr->saved_state_array[index];
                        } else
                                read_value = crb_entry->value_1;

                        qla82xx_md_rw_32(ha, addr, read_value, 1);
                        opcode &= ~QLA82XX_DBG_OPCODE_WRSTATE;
                }

                if (opcode & QLA82XX_DBG_OPCODE_MDSTATE) {
                        index = crb_entry->crb_ctrl.state_index_v;
                        read_value = tmplt_hdr->saved_state_array[index];
                        read_value <<= crb_entry->crb_ctrl.shl;
                        read_value >>= crb_entry->crb_ctrl.shr;
                        if (crb_entry->value_2)
                                read_value &= crb_entry->value_2;
                        read_value |= crb_entry->value_3;
                        read_value += crb_entry->value_1;
                        tmplt_hdr->saved_state_array[index] = read_value;
                        opcode &= ~QLA82XX_DBG_OPCODE_MDSTATE;
                }
                crb_addr += crb_entry->crb_strd.addr_stride;
        }
        return rval;
}

static void
qla82xx_minidump_process_rdocm(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t r_addr, r_stride, loop_cnt, i, r_value;
        struct qla82xx_md_entry_rdocm *ocm_hdr;
        __le32 *data_ptr = *d_ptr;

        ocm_hdr = (struct qla82xx_md_entry_rdocm *)entry_hdr;
        r_addr = ocm_hdr->read_addr;
        r_stride = ocm_hdr->read_addr_stride;
        loop_cnt = ocm_hdr->op_count;

        for (i = 0; i < loop_cnt; i++) {
                r_value = rd_reg_dword(r_addr + ha->nx_pcibase);
                *data_ptr++ = cpu_to_le32(r_value);
                r_addr += r_stride;
        }
        *d_ptr = data_ptr;
}

static void
qla82xx_minidump_process_rdmux(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t r_addr, s_stride, s_addr, s_value, loop_cnt, i, r_value;
        struct qla82xx_md_entry_mux *mux_hdr;
        __le32 *data_ptr = *d_ptr;

        mux_hdr = (struct qla82xx_md_entry_mux *)entry_hdr;
        r_addr = mux_hdr->read_addr;
        s_addr = mux_hdr->select_addr;
        s_stride = mux_hdr->select_value_stride;
        s_value = mux_hdr->select_value;
        loop_cnt = mux_hdr->op_count;

        for (i = 0; i < loop_cnt; i++) {
                qla82xx_md_rw_32(ha, s_addr, s_value, 1);
                r_value = qla82xx_md_rw_32(ha, r_addr, 0, 0);
                *data_ptr++ = cpu_to_le32(s_value);
                *data_ptr++ = cpu_to_le32(r_value);
                s_value += s_stride;
        }
        *d_ptr = data_ptr;
}

static void
qla82xx_minidump_process_rdcrb(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t r_addr, r_stride, loop_cnt, i, r_value;
        struct qla82xx_md_entry_crb *crb_hdr;
        __le32 *data_ptr = *d_ptr;

        crb_hdr = (struct qla82xx_md_entry_crb *)entry_hdr;
        r_addr = crb_hdr->addr;
        r_stride = crb_hdr->crb_strd.addr_stride;
        loop_cnt = crb_hdr->op_count;

        for (i = 0; i < loop_cnt; i++) {
                r_value = qla82xx_md_rw_32(ha, r_addr, 0, 0);
                *data_ptr++ = cpu_to_le32(r_addr);
                *data_ptr++ = cpu_to_le32(r_value);
                r_addr += r_stride;
        }
        *d_ptr = data_ptr;
}

static int
qla82xx_minidump_process_l2tag(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t addr, r_addr, c_addr, t_r_addr;
        uint32_t i, k, loop_count, t_value, r_cnt, r_value;
        unsigned long p_wait, w_time, p_mask;
        uint32_t c_value_w, c_value_r;
        struct qla82xx_md_entry_cache *cache_hdr;
        int rval = QLA_FUNCTION_FAILED;
        __le32 *data_ptr = *d_ptr;

        cache_hdr = (struct qla82xx_md_entry_cache *)entry_hdr;
        loop_count = cache_hdr->op_count;
        r_addr = cache_hdr->read_addr;
        c_addr = cache_hdr->control_addr;
        c_value_w = cache_hdr->cache_ctrl.write_value;

        t_r_addr = cache_hdr->tag_reg_addr;
        t_value = cache_hdr->addr_ctrl.init_tag_value;
        r_cnt = cache_hdr->read_ctrl.read_addr_cnt;
        p_wait = cache_hdr->cache_ctrl.poll_wait;
        p_mask = cache_hdr->cache_ctrl.poll_mask;

        for (i = 0; i < loop_count; i++) {
                qla82xx_md_rw_32(ha, t_r_addr, t_value, 1);
                if (c_value_w)
                        qla82xx_md_rw_32(ha, c_addr, c_value_w, 1);

                if (p_mask) {
                        w_time = jiffies + p_wait;
                        do {
                                c_value_r = qla82xx_md_rw_32(ha, c_addr, 0, 0);
                                if ((c_value_r & p_mask) == 0)
                                        break;
                                else if (time_after_eq(jiffies, w_time)) {
                                        /* capturing dump failed */
                                        ql_dbg(ql_dbg_p3p, vha, 0xb032,
                                            "c_value_r: 0x%x, poll_mask: 0x%lx, "
                                            "w_time: 0x%lx\n",
                                            c_value_r, p_mask, w_time);
                                        return rval;
                                }
                        } while (1);
                }

                addr = r_addr;
                for (k = 0; k < r_cnt; k++) {
                        r_value = qla82xx_md_rw_32(ha, addr, 0, 0);
                        *data_ptr++ = cpu_to_le32(r_value);
                        addr += cache_hdr->read_ctrl.read_addr_stride;
                }
                t_value += cache_hdr->addr_ctrl.tag_value_stride;
        }
        *d_ptr = data_ptr;
        return QLA_SUCCESS;
}

static void
qla82xx_minidump_process_l1cache(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t addr, r_addr, c_addr, t_r_addr;
        uint32_t i, k, loop_count, t_value, r_cnt, r_value;
        uint32_t c_value_w;
        struct qla82xx_md_entry_cache *cache_hdr;
        __le32 *data_ptr = *d_ptr;

        cache_hdr = (struct qla82xx_md_entry_cache *)entry_hdr;
        loop_count = cache_hdr->op_count;
        r_addr = cache_hdr->read_addr;
        c_addr = cache_hdr->control_addr;
        c_value_w = cache_hdr->cache_ctrl.write_value;

        t_r_addr = cache_hdr->tag_reg_addr;
        t_value = cache_hdr->addr_ctrl.init_tag_value;
        r_cnt = cache_hdr->read_ctrl.read_addr_cnt;

        for (i = 0; i < loop_count; i++) {
                qla82xx_md_rw_32(ha, t_r_addr, t_value, 1);
                qla82xx_md_rw_32(ha, c_addr, c_value_w, 1);
                addr = r_addr;
                for (k = 0; k < r_cnt; k++) {
                        r_value = qla82xx_md_rw_32(ha, addr, 0, 0);
                        *data_ptr++ = cpu_to_le32(r_value);
                        addr += cache_hdr->read_ctrl.read_addr_stride;
                }
                t_value += cache_hdr->addr_ctrl.tag_value_stride;
        }
        *d_ptr = data_ptr;
}

static void
qla82xx_minidump_process_queue(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t s_addr, r_addr;
        uint32_t r_stride, r_value, r_cnt, qid = 0;
        uint32_t i, k, loop_cnt;
        struct qla82xx_md_entry_queue *q_hdr;
        __le32 *data_ptr = *d_ptr;

        q_hdr = (struct qla82xx_md_entry_queue *)entry_hdr;
        s_addr = q_hdr->select_addr;
        r_cnt = q_hdr->rd_strd.read_addr_cnt;
        r_stride = q_hdr->rd_strd.read_addr_stride;
        loop_cnt = q_hdr->op_count;

        for (i = 0; i < loop_cnt; i++) {
                qla82xx_md_rw_32(ha, s_addr, qid, 1);
                r_addr = q_hdr->read_addr;
                for (k = 0; k < r_cnt; k++) {
                        r_value = qla82xx_md_rw_32(ha, r_addr, 0, 0);
                        *data_ptr++ = cpu_to_le32(r_value);
                        r_addr += r_stride;
                }
                qid += q_hdr->q_strd.queue_id_stride;
        }
        *d_ptr = data_ptr;
}

static void
qla82xx_minidump_process_rdrom(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t r_addr, r_value;
        uint32_t i, loop_cnt;
        struct qla82xx_md_entry_rdrom *rom_hdr;
        __le32 *data_ptr = *d_ptr;

        rom_hdr = (struct qla82xx_md_entry_rdrom *)entry_hdr;
        r_addr = rom_hdr->read_addr;
        loop_cnt = rom_hdr->read_data_size/sizeof(uint32_t);

        for (i = 0; i < loop_cnt; i++) {
                qla82xx_md_rw_32(ha, MD_DIRECT_ROM_WINDOW,
                    (r_addr & 0xFFFF0000), 1);
                r_value = qla82xx_md_rw_32(ha,
                    MD_DIRECT_ROM_READ_BASE +
                    (r_addr & 0x0000FFFF), 0, 0);
                *data_ptr++ = cpu_to_le32(r_value);
                r_addr += sizeof(uint32_t);
        }
        *d_ptr = data_ptr;
}

static int
qla82xx_minidump_process_rdmem(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, __le32 **d_ptr)
{
        struct qla_hw_data *ha = vha->hw;
        uint32_t r_addr, r_value, r_data;
        uint32_t i, j, loop_cnt;
        struct qla82xx_md_entry_rdmem *m_hdr;
        unsigned long flags;
        int rval = QLA_FUNCTION_FAILED;
        __le32 *data_ptr = *d_ptr;

        m_hdr = (struct qla82xx_md_entry_rdmem *)entry_hdr;
        r_addr = m_hdr->read_addr;
        loop_cnt = m_hdr->read_data_size/16;

        if (r_addr & 0xf) {
                ql_log(ql_log_warn, vha, 0xb033,
                    "Read addr 0x%x not 16 bytes aligned\n", r_addr);
                return rval;
        }

        if (m_hdr->read_data_size % 16) {
                ql_log(ql_log_warn, vha, 0xb034,
                    "Read data[0x%x] not multiple of 16 bytes\n",
                    m_hdr->read_data_size);
                return rval;
        }

        ql_dbg(ql_dbg_p3p, vha, 0xb035,
            "[%s]: rdmem_addr: 0x%x, read_data_size: 0x%x, loop_cnt: 0x%x\n",
            __func__, r_addr, m_hdr->read_data_size, loop_cnt);

        write_lock_irqsave(&ha->hw_lock, flags);
        for (i = 0; i < loop_cnt; i++) {
                qla82xx_md_rw_32(ha, MD_MIU_TEST_AGT_ADDR_LO, r_addr, 1);
                r_value = 0;
                qla82xx_md_rw_32(ha, MD_MIU_TEST_AGT_ADDR_HI, r_value, 1);
                r_value = MIU_TA_CTL_ENABLE;
                qla82xx_md_rw_32(ha, MD_MIU_TEST_AGT_CTRL, r_value, 1);
                r_value = MIU_TA_CTL_START | MIU_TA_CTL_ENABLE;
                qla82xx_md_rw_32(ha, MD_MIU_TEST_AGT_CTRL, r_value, 1);

                for (j = 0; j < MAX_CTL_CHECK; j++) {
                        r_value = qla82xx_md_rw_32(ha,
                            MD_MIU_TEST_AGT_CTRL, 0, 0);
                        if ((r_value & MIU_TA_CTL_BUSY) == 0)
                                break;
                }

                if (j >= MAX_CTL_CHECK) {
                        printk_ratelimited(KERN_ERR
                            "failed to read through agent\n");
                        write_unlock_irqrestore(&ha->hw_lock, flags);
                        return rval;
                }

                for (j = 0; j < 4; j++) {
                        r_data = qla82xx_md_rw_32(ha,
                            MD_MIU_TEST_AGT_RDDATA[j], 0, 0);
                        *data_ptr++ = cpu_to_le32(r_data);
                }
                r_addr += 16;
        }
        write_unlock_irqrestore(&ha->hw_lock, flags);
        *d_ptr = data_ptr;
        return QLA_SUCCESS;
}

int
qla82xx_validate_template_chksum(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        uint64_t chksum = 0;
        uint32_t *d_ptr = (uint32_t *)ha->md_tmplt_hdr;
        int count = ha->md_template_size/sizeof(uint32_t);

        while (count-- > 0)
                chksum += *d_ptr++;
        while (chksum >> 32)
                chksum = (chksum & 0xFFFFFFFF) + (chksum >> 32);
        return ~chksum;
}

static void
qla82xx_mark_entry_skipped(scsi_qla_host_t *vha,
        qla82xx_md_entry_hdr_t *entry_hdr, int index)
{
        entry_hdr->d_ctrl.driver_flags |= QLA82XX_DBG_SKIPPED_FLAG;
        ql_dbg(ql_dbg_p3p, vha, 0xb036,
            "Skipping entry[%d]: "
            "ETYPE[0x%x]-ELEVEL[0x%x]\n",
            index, entry_hdr->entry_type,
            entry_hdr->d_ctrl.entry_capture_mask);
}

int
qla82xx_md_collect(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        int no_entry_hdr = 0;
        qla82xx_md_entry_hdr_t *entry_hdr;
        struct qla82xx_md_template_hdr *tmplt_hdr;
        __le32 *data_ptr;
        uint32_t total_data_size = 0, f_capture_mask, data_collected = 0;
        int i = 0, rval = QLA_FUNCTION_FAILED;

        tmplt_hdr = (struct qla82xx_md_template_hdr *)ha->md_tmplt_hdr;
        data_ptr = ha->md_dump;

        if (ha->fw_dumped) {
                ql_log(ql_log_warn, vha, 0xb037,
                    "Firmware has been previously dumped (%p) "
                    "-- ignoring request.\n", ha->fw_dump);
                goto md_failed;
        }

        ha->fw_dumped = false;

        if (!ha->md_tmplt_hdr || !ha->md_dump) {
                ql_log(ql_log_warn, vha, 0xb038,
                    "Memory not allocated for minidump capture\n");
                goto md_failed;
        }

        if (ha->flags.isp82xx_no_md_cap) {
                ql_log(ql_log_warn, vha, 0xb054,
                    "Forced reset from application, "
                    "ignore minidump capture\n");
                ha->flags.isp82xx_no_md_cap = 0;
                goto md_failed;
        }

        if (qla82xx_validate_template_chksum(vha)) {
                ql_log(ql_log_info, vha, 0xb039,
                    "Template checksum validation error\n");
                goto md_failed;
        }

        no_entry_hdr = tmplt_hdr->num_of_entries;
        ql_dbg(ql_dbg_p3p, vha, 0xb03a,
            "No of entry headers in Template: 0x%x\n", no_entry_hdr);

        ql_dbg(ql_dbg_p3p, vha, 0xb03b,
            "Capture Mask obtained: 0x%x\n", tmplt_hdr->capture_debug_level);

        f_capture_mask = tmplt_hdr->capture_debug_level & 0xFF;

        /* Validate whether required debug level is set */
        if ((f_capture_mask & 0x3) != 0x3) {
                ql_log(ql_log_warn, vha, 0xb03c,
                    "Minimum required capture mask[0x%x] level not set\n",
                    f_capture_mask);
                goto md_failed;
        }
        tmplt_hdr->driver_capture_mask = ql2xmdcapmask;

        tmplt_hdr->driver_info[0] = vha->host_no;
        tmplt_hdr->driver_info[1] = (QLA_DRIVER_MAJOR_VER << 24) |
            (QLA_DRIVER_MINOR_VER << 16) | (QLA_DRIVER_PATCH_VER << 8) |
            QLA_DRIVER_BETA_VER;

        total_data_size = ha->md_dump_size;

        ql_dbg(ql_dbg_p3p, vha, 0xb03d,
            "Total minidump data_size 0x%x to be captured\n", total_data_size);

        /* Check whether template obtained is valid */
        if (tmplt_hdr->entry_type != QLA82XX_TLHDR) {
                ql_log(ql_log_warn, vha, 0xb04e,
                    "Bad template header entry type: 0x%x obtained\n",
                    tmplt_hdr->entry_type);
                goto md_failed;
        }

        entry_hdr = (qla82xx_md_entry_hdr_t *)
            (((uint8_t *)ha->md_tmplt_hdr) + tmplt_hdr->first_entry_offset);

        /* Walk through the entry headers */
        for (i = 0; i < no_entry_hdr; i++) {

                if (data_collected > total_data_size) {
                        ql_log(ql_log_warn, vha, 0xb03e,
                            "More MiniDump data collected: [0x%x]\n",
                            data_collected);
                        goto md_failed;
                }

                if (!(entry_hdr->d_ctrl.entry_capture_mask &
                    ql2xmdcapmask)) {
                        entry_hdr->d_ctrl.driver_flags |=
                            QLA82XX_DBG_SKIPPED_FLAG;
                        ql_dbg(ql_dbg_p3p, vha, 0xb03f,
                            "Skipping entry[%d]: "
                            "ETYPE[0x%x]-ELEVEL[0x%x]\n",
                            i, entry_hdr->entry_type,
                            entry_hdr->d_ctrl.entry_capture_mask);
                        goto skip_nxt_entry;
                }

                ql_dbg(ql_dbg_p3p, vha, 0xb040,
                    "[%s]: data ptr[%d]: %p, entry_hdr: %p\n"
                    "entry_type: 0x%x, capture_mask: 0x%x\n",
                    __func__, i, data_ptr, entry_hdr,
                    entry_hdr->entry_type,
                    entry_hdr->d_ctrl.entry_capture_mask);

                ql_dbg(ql_dbg_p3p, vha, 0xb041,
                    "Data collected: [0x%x], Dump size left:[0x%x]\n",
                    data_collected, (ha->md_dump_size - data_collected));

                /* Decode the entry type and take
                 * required action to capture debug data */
                switch (entry_hdr->entry_type) {
                case QLA82XX_RDEND:
                        qla82xx_mark_entry_skipped(vha, entry_hdr, i);
                        break;
                case QLA82XX_CNTRL:
                        rval = qla82xx_minidump_process_control(vha,
                            entry_hdr, &data_ptr);
                        if (rval != QLA_SUCCESS) {
                                qla82xx_mark_entry_skipped(vha, entry_hdr, i);
                                goto md_failed;
                        }
                        break;
                case QLA82XX_RDCRB:
                        qla82xx_minidump_process_rdcrb(vha,
                            entry_hdr, &data_ptr);
                        break;
                case QLA82XX_RDMEM:
                        rval = qla82xx_minidump_process_rdmem(vha,
                            entry_hdr, &data_ptr);
                        if (rval != QLA_SUCCESS) {
                                qla82xx_mark_entry_skipped(vha, entry_hdr, i);
                                goto md_failed;
                        }
                        break;
                case QLA82XX_BOARD:
                case QLA82XX_RDROM:
                        qla82xx_minidump_process_rdrom(vha,
                            entry_hdr, &data_ptr);
                        break;
                case QLA82XX_L2DTG:
                case QLA82XX_L2ITG:
                case QLA82XX_L2DAT:
                case QLA82XX_L2INS:
                        rval = qla82xx_minidump_process_l2tag(vha,
                            entry_hdr, &data_ptr);
                        if (rval != QLA_SUCCESS) {
                                qla82xx_mark_entry_skipped(vha, entry_hdr, i);
                                goto md_failed;
                        }
                        break;
                case QLA82XX_L1DAT:
                case QLA82XX_L1INS:
                        qla82xx_minidump_process_l1cache(vha,
                            entry_hdr, &data_ptr);
                        break;
                case QLA82XX_RDOCM:
                        qla82xx_minidump_process_rdocm(vha,
                            entry_hdr, &data_ptr);
                        break;
                case QLA82XX_RDMUX:
                        qla82xx_minidump_process_rdmux(vha,
                            entry_hdr, &data_ptr);
                        break;
                case QLA82XX_QUEUE:
                        qla82xx_minidump_process_queue(vha,
                            entry_hdr, &data_ptr);
                        break;
                case QLA82XX_RDNOP:
                default:
                        qla82xx_mark_entry_skipped(vha, entry_hdr, i);
                        break;
                }

                ql_dbg(ql_dbg_p3p, vha, 0xb042,
                    "[%s]: data ptr[%d]: %p\n", __func__, i, data_ptr);

                data_collected = (uint8_t *)data_ptr -
                    (uint8_t *)ha->md_dump;
skip_nxt_entry:
                entry_hdr = (qla82xx_md_entry_hdr_t *)
                    (((uint8_t *)entry_hdr) + entry_hdr->entry_size);
        }

        if (data_collected != total_data_size) {
                ql_dbg(ql_dbg_p3p, vha, 0xb043,
                    "MiniDump data mismatch: Data collected: [0x%x],"
                    "total_data_size:[0x%x]\n",
                    data_collected, total_data_size);
                goto md_failed;
        }

        ql_log(ql_log_info, vha, 0xb044,
            "Firmware dump saved to temp buffer (%ld/%p %ld/%p).\n",
            vha->host_no, ha->md_tmplt_hdr, vha->host_no, ha->md_dump);
        ha->fw_dumped = true;
        qla2x00_post_uevent_work(vha, QLA_UEVENT_CODE_FW_DUMP);

md_failed:
        return rval;
}

int
qla82xx_md_alloc(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        int i, k;
        struct qla82xx_md_template_hdr *tmplt_hdr;

        tmplt_hdr = (struct qla82xx_md_template_hdr *)ha->md_tmplt_hdr;

        if (ql2xmdcapmask < 0x3 || ql2xmdcapmask > 0x7F) {
                ql2xmdcapmask = tmplt_hdr->capture_debug_level & 0xFF;
                ql_log(ql_log_info, vha, 0xb045,
                    "Forcing driver capture mask to firmware default capture mask: 0x%x.\n",
                    ql2xmdcapmask);
        }

        for (i = 0x2, k = 1; (i & QLA82XX_DEFAULT_CAP_MASK); i <<= 1, k++) {
                if (i & ql2xmdcapmask)
                        ha->md_dump_size += tmplt_hdr->capture_size_array[k];
        }

        if (ha->md_dump) {
                ql_log(ql_log_warn, vha, 0xb046,
                    "Firmware dump previously allocated.\n");
                return 1;
        }

        ha->md_dump = vmalloc(ha->md_dump_size);
        if (ha->md_dump == NULL) {
                ql_log(ql_log_warn, vha, 0xb047,
                    "Unable to allocate memory for Minidump size "
                    "(0x%x).\n", ha->md_dump_size);
                return 1;
        }
        return 0;
}

void
qla82xx_md_free(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;

        /* Release the template header allocated */
        if (ha->md_tmplt_hdr) {
                ql_log(ql_log_info, vha, 0xb048,
                    "Free MiniDump template: %p, size (%d KB)\n",
                    ha->md_tmplt_hdr, ha->md_template_size / 1024);
                dma_free_coherent(&ha->pdev->dev, ha->md_template_size,
                    ha->md_tmplt_hdr, ha->md_tmplt_hdr_dma);
                ha->md_tmplt_hdr = NULL;
        }

        /* Release the template data buffer allocated */
        if (ha->md_dump) {
                ql_log(ql_log_info, vha, 0xb049,
                    "Free MiniDump memory: %p, size (%d KB)\n",
                    ha->md_dump, ha->md_dump_size / 1024);
                vfree(ha->md_dump);
                ha->md_dump_size = 0;
                ha->md_dump = NULL;
        }
}

void
qla82xx_md_prep(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        int rval;

        /* Get Minidump template size */
        rval = qla82xx_md_get_template_size(vha);
        if (rval == QLA_SUCCESS) {
                ql_log(ql_log_info, vha, 0xb04a,
                    "MiniDump Template size obtained (%d KB)\n",
                    ha->md_template_size / 1024);

                /* Get Minidump template */
                if (IS_QLA8044(ha))
                        rval = qla8044_md_get_template(vha);
                else
                        rval = qla82xx_md_get_template(vha);

                if (rval == QLA_SUCCESS) {
                        ql_dbg(ql_dbg_p3p, vha, 0xb04b,
                            "MiniDump Template obtained\n");

                        /* Allocate memory for minidump */
                        rval = qla82xx_md_alloc(vha);
                        if (rval == QLA_SUCCESS)
                                ql_log(ql_log_info, vha, 0xb04c,
                                    "MiniDump memory allocated (%d KB)\n",
                                    ha->md_dump_size / 1024);
                        else {
                                ql_log(ql_log_info, vha, 0xb04d,
                                    "Free MiniDump template: %p, size: (%d KB)\n",
                                    ha->md_tmplt_hdr,
                                    ha->md_template_size / 1024);
                                dma_free_coherent(&ha->pdev->dev,
                                    ha->md_template_size,
                                    ha->md_tmplt_hdr, ha->md_tmplt_hdr_dma);
                                ha->md_tmplt_hdr = NULL;
                        }

                }
        }
}

int
qla82xx_beacon_on(struct scsi_qla_host *vha)
{

        int rval;
        struct qla_hw_data *ha = vha->hw;

        qla82xx_idc_lock(ha);
        rval = qla82xx_mbx_beacon_ctl(vha, 1);

        if (rval) {
                ql_log(ql_log_warn, vha, 0xb050,
                    "mbx set led config failed in %s\n", __func__);
                goto exit;
        }
        ha->beacon_blink_led = 1;
exit:
        qla82xx_idc_unlock(ha);
        return rval;
}

int
qla82xx_beacon_off(struct scsi_qla_host *vha)
{

        int rval;
        struct qla_hw_data *ha = vha->hw;

        qla82xx_idc_lock(ha);
        rval = qla82xx_mbx_beacon_ctl(vha, 0);

        if (rval) {
                ql_log(ql_log_warn, vha, 0xb051,
                    "mbx set led config failed in %s\n", __func__);
                goto exit;
        }
        ha->beacon_blink_led = 0;
exit:
        qla82xx_idc_unlock(ha);
        return rval;
}

void
qla82xx_fw_dump(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;

        if (!ha->allow_cna_fw_dump)
                return;

        scsi_block_requests(vha->host);
        ha->flags.isp82xx_no_md_cap = 1;
        qla82xx_idc_lock(ha);
        qla82xx_set_reset_owner(vha);
        qla82xx_idc_unlock(ha);
        qla2x00_wait_for_chip_reset(vha);
        scsi_unblock_requests(vha->host);
}