/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2014 QLogic Corporation
 *
 * See LICENSE.qla2xxx for copyright and licensing details.
 */
#include "qla_def.h"
#include "qla_target.h"

#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/cpu.h>
#include <linux/t10-pi.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_bsg_fc.h>
#include <scsi/scsi_eh.h>
#include <scsi/fc/fc_fs.h>
#include <linux/nvme-fc-driver.h>

static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
static void qla2x00_status_entry(scsi_qla_host_t *, struct rsp_que *, void *);
static void qla2x00_status_cont_entry(struct rsp_que *, sts_cont_entry_t *);
static int qla2x00_error_entry(scsi_qla_host_t *, struct rsp_que *,
        sts_entry_t *);

/**
 * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
 * @irq:
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla2100_intr_handler(int irq, void *dev_id)
{
        scsi_qla_host_t *vha;
        struct qla_hw_data *ha;
        struct device_reg_2xxx __iomem *reg;
        int             status;
        unsigned long   iter;
        uint16_t        hccr;
        uint16_t        mb[4];
        struct rsp_que *rsp;
        unsigned long   flags;

        rsp = (struct rsp_que *) dev_id;
        if (!rsp) {
                ql_log(ql_log_info, NULL, 0x505d,
                    "%s: NULL response queue pointer.\n", __func__);
                return (IRQ_NONE);
        }

        ha = rsp->hw;
        reg = &ha->iobase->isp;
        status = 0;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        vha = pci_get_drvdata(ha->pdev);
        for (iter = 50; iter--; ) {
                hccr = RD_REG_WORD(&reg->hccr);
                if (qla2x00_check_reg16_for_disconnect(vha, hccr))
                        break;
                if (hccr & HCCR_RISC_PAUSE) {
                        if (pci_channel_offline(ha->pdev))
                                break;

                        /*
                         * Issue a "HARD" reset in order for the RISC interrupt
                         * bit to be cleared.  Schedule a big hammer to get
                         * out of the RISC PAUSED state.
                         */
                        WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
                        RD_REG_WORD(&reg->hccr);

                        ha->isp_ops->fw_dump(vha, 1);
                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                        break;
                } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
                        break;

                if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
                        WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
                        RD_REG_WORD(&reg->hccr);

                        /* Get mailbox data. */
                        mb[0] = RD_MAILBOX_REG(ha, reg, 0);
                        if (mb[0] > 0x3fff && mb[0] < 0x8000) {
                                qla2x00_mbx_completion(vha, mb[0]);
                                status |= MBX_INTERRUPT;
                        } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
                                mb[1] = RD_MAILBOX_REG(ha, reg, 1);
                                mb[2] = RD_MAILBOX_REG(ha, reg, 2);
                                mb[3] = RD_MAILBOX_REG(ha, reg, 3);
                                qla2x00_async_event(vha, rsp, mb);
                        } else {
                                /*EMPTY*/
                                ql_dbg(ql_dbg_async, vha, 0x5025,
                                    "Unrecognized interrupt type (%d).\n",
                                    mb[0]);
                        }
                        /* Release mailbox registers. */
                        WRT_REG_WORD(&reg->semaphore, 0);
                        RD_REG_WORD(&reg->semaphore);
                } else {
                        qla2x00_process_response_queue(rsp);

                        WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
                        RD_REG_WORD(&reg->hccr);
                }
        }
        qla2x00_handle_mbx_completion(ha, status);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        return (IRQ_HANDLED);
}

bool
qla2x00_check_reg32_for_disconnect(scsi_qla_host_t *vha, uint32_t reg)
{
        /* Check for PCI disconnection */
        if (reg == 0xffffffff && !pci_channel_offline(vha->hw->pdev)) {
                if (!test_and_set_bit(PFLG_DISCONNECTED, &vha->pci_flags) &&
                    !test_bit(PFLG_DRIVER_REMOVING, &vha->pci_flags) &&
                    !test_bit(PFLG_DRIVER_PROBING, &vha->pci_flags)) {
                        /*
                         * Schedule this (only once) on the default system
                         * workqueue so that all the adapter workqueues and the
                         * DPC thread can be shutdown cleanly.
                         */
                        schedule_work(&vha->hw->board_disable);
                }
                return true;
        } else
                return false;
}

bool
qla2x00_check_reg16_for_disconnect(scsi_qla_host_t *vha, uint16_t reg)
{
        return qla2x00_check_reg32_for_disconnect(vha, 0xffff0000 | reg);
}

/**
 * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 * @irq:
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla2300_intr_handler(int irq, void *dev_id)
{
        scsi_qla_host_t *vha;
        struct device_reg_2xxx __iomem *reg;
        int             status;
        unsigned long   iter;
        uint32_t        stat;
        uint16_t        hccr;
        uint16_t        mb[4];
        struct rsp_que *rsp;
        struct qla_hw_data *ha;
        unsigned long   flags;

        rsp = (struct rsp_que *) dev_id;
        if (!rsp) {
                ql_log(ql_log_info, NULL, 0x5058,
                    "%s: NULL response queue pointer.\n", __func__);
                return (IRQ_NONE);
        }

        ha = rsp->hw;
        reg = &ha->iobase->isp;
        status = 0;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        vha = pci_get_drvdata(ha->pdev);
        for (iter = 50; iter--; ) {
                stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
                if (qla2x00_check_reg32_for_disconnect(vha, stat))
                        break;
                if (stat & HSR_RISC_PAUSED) {
                        if (unlikely(pci_channel_offline(ha->pdev)))
                                break;

                        hccr = RD_REG_WORD(&reg->hccr);

                        if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
                                ql_log(ql_log_warn, vha, 0x5026,
                                    "Parity error -- HCCR=%x, Dumping "
                                    "firmware.\n", hccr);
                        else
                                ql_log(ql_log_warn, vha, 0x5027,
                                    "RISC paused -- HCCR=%x, Dumping "
                                    "firmware.\n", hccr);

                        /*
                         * Issue a "HARD" reset in order for the RISC
                         * interrupt bit to be cleared.  Schedule a big
                         * hammer to get out of the RISC PAUSED state.
                         */
                        WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
                        RD_REG_WORD(&reg->hccr);

                        ha->isp_ops->fw_dump(vha, 1);
                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                        break;
                } else if ((stat & HSR_RISC_INT) == 0)
                        break;

                switch (stat & 0xff) {
                case 0x1:
                case 0x2:
                case 0x10:
                case 0x11:
                        qla2x00_mbx_completion(vha, MSW(stat));
                        status |= MBX_INTERRUPT;

                        /* Release mailbox registers. */
                        WRT_REG_WORD(&reg->semaphore, 0);
                        break;
                case 0x12:
                        mb[0] = MSW(stat);
                        mb[1] = RD_MAILBOX_REG(ha, reg, 1);
                        mb[2] = RD_MAILBOX_REG(ha, reg, 2);
                        mb[3] = RD_MAILBOX_REG(ha, reg, 3);
                        qla2x00_async_event(vha, rsp, mb);
                        break;
                case 0x13:
                        qla2x00_process_response_queue(rsp);
                        break;
                case 0x15:
                        mb[0] = MBA_CMPLT_1_16BIT;
                        mb[1] = MSW(stat);
                        qla2x00_async_event(vha, rsp, mb);
                        break;
                case 0x16:
                        mb[0] = MBA_SCSI_COMPLETION;
                        mb[1] = MSW(stat);
                        mb[2] = RD_MAILBOX_REG(ha, reg, 2);
                        qla2x00_async_event(vha, rsp, mb);
                        break;
                default:
                        ql_dbg(ql_dbg_async, vha, 0x5028,
                            "Unrecognized interrupt type (%d).\n", stat & 0xff);
                        break;
                }
                WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
                RD_REG_WORD_RELAXED(&reg->hccr);
        }
        qla2x00_handle_mbx_completion(ha, status);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        return (IRQ_HANDLED);
}

/**
 * qla2x00_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
qla2x00_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
{
        uint16_t        cnt;
        uint32_t        mboxes;
        uint16_t __iomem *wptr;
        struct qla_hw_data *ha = vha->hw;
        struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

        /* Read all mbox registers? */
        mboxes = (1 << ha->mbx_count) - 1;
        if (!ha->mcp)
                ql_dbg(ql_dbg_async, vha, 0x5001, "MBX pointer ERROR.\n");
        else
                mboxes = ha->mcp->in_mb;

        /* Load return mailbox registers. */
        ha->flags.mbox_int = 1;
        ha->mailbox_out[0] = mb0;
        mboxes >>= 1;
        wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);

        for (cnt = 1; cnt < ha->mbx_count; cnt++) {
                if (IS_QLA2200(ha) && cnt == 8)
                        wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
                if ((cnt == 4 || cnt == 5) && (mboxes & BIT_0))
                        ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
                else if (mboxes & BIT_0)
                        ha->mailbox_out[cnt] = RD_REG_WORD(wptr);

                wptr++;
                mboxes >>= 1;
        }
}

static void
qla81xx_idc_event(scsi_qla_host_t *vha, uint16_t aen, uint16_t descr)
{
        static char *event[] =
                { "Complete", "Request Notification", "Time Extension" };
        int rval;
        struct device_reg_24xx __iomem *reg24 = &vha->hw->iobase->isp24;
        struct device_reg_82xx __iomem *reg82 = &vha->hw->iobase->isp82;
        uint16_t __iomem *wptr;
        uint16_t cnt, timeout, mb[QLA_IDC_ACK_REGS];

        /* Seed data -- mailbox1 -> mailbox7. */
        if (IS_QLA81XX(vha->hw) || IS_QLA83XX(vha->hw))
                wptr = (uint16_t __iomem *)&reg24->mailbox1;
        else if (IS_QLA8044(vha->hw))
                wptr = (uint16_t __iomem *)&reg82->mailbox_out[1];
        else
                return;

        for (cnt = 0; cnt < QLA_IDC_ACK_REGS; cnt++, wptr++)
                mb[cnt] = RD_REG_WORD(wptr);

        ql_dbg(ql_dbg_async, vha, 0x5021,
            "Inter-Driver Communication %s -- "
            "%04x %04x %04x %04x %04x %04x %04x.\n",
            event[aen & 0xff], mb[0], mb[1], mb[2], mb[3],
            mb[4], mb[5], mb[6]);
        switch (aen) {
        /* Handle IDC Error completion case. */
        case MBA_IDC_COMPLETE:
                if (mb[1] >> 15) {
                        vha->hw->flags.idc_compl_status = 1;
                        if (vha->hw->notify_dcbx_comp && !vha->vp_idx)
                                complete(&vha->hw->dcbx_comp);
                }
                break;

        case MBA_IDC_NOTIFY:
                /* Acknowledgement needed? [Notify && non-zero timeout]. */
                timeout = (descr >> 8) & 0xf;
                ql_dbg(ql_dbg_async, vha, 0x5022,
                    "%lu Inter-Driver Communication %s -- ACK timeout=%d.\n",
                    vha->host_no, event[aen & 0xff], timeout);

                if (!timeout)
                        return;
                rval = qla2x00_post_idc_ack_work(vha, mb);
                if (rval != QLA_SUCCESS)
                        ql_log(ql_log_warn, vha, 0x5023,
                            "IDC failed to post ACK.\n");
                break;
        case MBA_IDC_TIME_EXT:
                vha->hw->idc_extend_tmo = descr;
                ql_dbg(ql_dbg_async, vha, 0x5087,
                    "%lu Inter-Driver Communication %s -- "
                    "Extend timeout by=%d.\n",
                    vha->host_no, event[aen & 0xff], vha->hw->idc_extend_tmo);
                break;
        }
}

#define LS_UNKNOWN      2
const char *
qla2x00_get_link_speed_str(struct qla_hw_data *ha, uint16_t speed)
{
        static const char *const link_speeds[] = {
                "1", "2", "?", "4", "8", "16", "32", "10"
        };
#define QLA_LAST_SPEED  7

        if (IS_QLA2100(ha) || IS_QLA2200(ha))
                return link_speeds[0];
        else if (speed == 0x13)
                return link_speeds[QLA_LAST_SPEED];
        else if (speed < QLA_LAST_SPEED)
                return link_speeds[speed];
        else
                return link_speeds[LS_UNKNOWN];
}

static void
qla83xx_handle_8200_aen(scsi_qla_host_t *vha, uint16_t *mb)
{
        struct qla_hw_data *ha = vha->hw;

        /*
         * 8200 AEN Interpretation:
         * mb[0] = AEN code
         * mb[1] = AEN Reason code
         * mb[2] = LSW of Peg-Halt Status-1 Register
         * mb[6] = MSW of Peg-Halt Status-1 Register
         * mb[3] = LSW of Peg-Halt Status-2 register
         * mb[7] = MSW of Peg-Halt Status-2 register
         * mb[4] = IDC Device-State Register value
         * mb[5] = IDC Driver-Presence Register value
         */
        ql_dbg(ql_dbg_async, vha, 0x506b, "AEN Code: mb[0] = 0x%x AEN reason: "
            "mb[1] = 0x%x PH-status1: mb[2] = 0x%x PH-status1: mb[6] = 0x%x.\n",
            mb[0], mb[1], mb[2], mb[6]);
        ql_dbg(ql_dbg_async, vha, 0x506c, "PH-status2: mb[3] = 0x%x "
            "PH-status2: mb[7] = 0x%x Device-State: mb[4] = 0x%x "
            "Drv-Presence: mb[5] = 0x%x.\n", mb[3], mb[7], mb[4], mb[5]);

        if (mb[1] & (IDC_PEG_HALT_STATUS_CHANGE | IDC_NIC_FW_REPORTED_FAILURE |
                                IDC_HEARTBEAT_FAILURE)) {
                ha->flags.nic_core_hung = 1;
                ql_log(ql_log_warn, vha, 0x5060,
                    "83XX: F/W Error Reported: Check if reset required.\n");

                if (mb[1] & IDC_PEG_HALT_STATUS_CHANGE) {
                        uint32_t protocol_engine_id, fw_err_code, err_level;

                        /*
                         * IDC_PEG_HALT_STATUS_CHANGE interpretation:
                         *  - PEG-Halt Status-1 Register:
                         *      (LSW = mb[2], MSW = mb[6])
                         *      Bits 0-7   = protocol-engine ID
                         *      Bits 8-28  = f/w error code
                         *      Bits 29-31 = Error-level
                         *          Error-level 0x1 = Non-Fatal error
                         *          Error-level 0x2 = Recoverable Fatal error
                         *          Error-level 0x4 = UnRecoverable Fatal error
                         *  - PEG-Halt Status-2 Register:
                         *      (LSW = mb[3], MSW = mb[7])
                         */
                        protocol_engine_id = (mb[2] & 0xff);
                        fw_err_code = (((mb[2] & 0xff00) >> 8) |
                            ((mb[6] & 0x1fff) << 8));
                        err_level = ((mb[6] & 0xe000) >> 13);
                        ql_log(ql_log_warn, vha, 0x5061, "PegHalt Status-1 "
                            "Register: protocol_engine_id=0x%x "
                            "fw_err_code=0x%x err_level=0x%x.\n",
                            protocol_engine_id, fw_err_code, err_level);
                        ql_log(ql_log_warn, vha, 0x5062, "PegHalt Status-2 "
                            "Register: 0x%x%x.\n", mb[7], mb[3]);
                        if (err_level == ERR_LEVEL_NON_FATAL) {
                                ql_log(ql_log_warn, vha, 0x5063,
                                    "Not a fatal error, f/w has recovered itself.\n");
                        } else if (err_level == ERR_LEVEL_RECOVERABLE_FATAL) {
                                ql_log(ql_log_fatal, vha, 0x5064,
                                    "Recoverable Fatal error: Chip reset "
                                    "required.\n");
                                qla83xx_schedule_work(vha,
                                    QLA83XX_NIC_CORE_RESET);
                        } else if (err_level == ERR_LEVEL_UNRECOVERABLE_FATAL) {
                                ql_log(ql_log_fatal, vha, 0x5065,
                                    "Unrecoverable Fatal error: Set FAILED "
                                    "state, reboot required.\n");
                                qla83xx_schedule_work(vha,
                                    QLA83XX_NIC_CORE_UNRECOVERABLE);
                        }
                }

                if (mb[1] & IDC_NIC_FW_REPORTED_FAILURE) {
                        uint16_t peg_fw_state, nw_interface_link_up;
                        uint16_t nw_interface_signal_detect, sfp_status;
                        uint16_t htbt_counter, htbt_monitor_enable;
                        uint16_t sfp_additional_info, sfp_multirate;
                        uint16_t sfp_tx_fault, link_speed, dcbx_status;

                        /*
                         * IDC_NIC_FW_REPORTED_FAILURE interpretation:
                         *  - PEG-to-FC Status Register:
                         *      (LSW = mb[2], MSW = mb[6])
                         *      Bits 0-7   = Peg-Firmware state
                         *      Bit 8      = N/W Interface Link-up
                         *      Bit 9      = N/W Interface signal detected
                         *      Bits 10-11 = SFP Status
                         *        SFP Status 0x0 = SFP+ transceiver not expected
                         *        SFP Status 0x1 = SFP+ transceiver not present
                         *        SFP Status 0x2 = SFP+ transceiver invalid
                         *        SFP Status 0x3 = SFP+ transceiver present and
                         *        valid
                         *      Bits 12-14 = Heartbeat Counter
                         *      Bit 15     = Heartbeat Monitor Enable
                         *      Bits 16-17 = SFP Additional Info
                         *        SFP info 0x0 = Unregocnized transceiver for
                         *        Ethernet
                         *        SFP info 0x1 = SFP+ brand validation failed
                         *        SFP info 0x2 = SFP+ speed validation failed
                         *        SFP info 0x3 = SFP+ access error
                         *      Bit 18     = SFP Multirate
                         *      Bit 19     = SFP Tx Fault
                         *      Bits 20-22 = Link Speed
                         *      Bits 23-27 = Reserved
                         *      Bits 28-30 = DCBX Status
                         *        DCBX Status 0x0 = DCBX Disabled
                         *        DCBX Status 0x1 = DCBX Enabled
                         *        DCBX Status 0x2 = DCBX Exchange error
                         *      Bit 31     = Reserved
                         */
                        peg_fw_state = (mb[2] & 0x00ff);
                        nw_interface_link_up = ((mb[2] & 0x0100) >> 8);
                        nw_interface_signal_detect = ((mb[2] & 0x0200) >> 9);
                        sfp_status = ((mb[2] & 0x0c00) >> 10);
                        htbt_counter = ((mb[2] & 0x7000) >> 12);
                        htbt_monitor_enable = ((mb[2] & 0x8000) >> 15);
                        sfp_additional_info = (mb[6] & 0x0003);
                        sfp_multirate = ((mb[6] & 0x0004) >> 2);
                        sfp_tx_fault = ((mb[6] & 0x0008) >> 3);
                        link_speed = ((mb[6] & 0x0070) >> 4);
                        dcbx_status = ((mb[6] & 0x7000) >> 12);

                        ql_log(ql_log_warn, vha, 0x5066,
                            "Peg-to-Fc Status Register:\n"
                            "peg_fw_state=0x%x, nw_interface_link_up=0x%x, "
                            "nw_interface_signal_detect=0x%x"
                            "\nsfp_statis=0x%x.\n ", peg_fw_state,
                            nw_interface_link_up, nw_interface_signal_detect,
                            sfp_status);
                        ql_log(ql_log_warn, vha, 0x5067,
                            "htbt_counter=0x%x, htbt_monitor_enable=0x%x, "
                            "sfp_additional_info=0x%x, sfp_multirate=0x%x.\n ",
                            htbt_counter, htbt_monitor_enable,
                            sfp_additional_info, sfp_multirate);
                        ql_log(ql_log_warn, vha, 0x5068,
                            "sfp_tx_fault=0x%x, link_state=0x%x, "
                            "dcbx_status=0x%x.\n", sfp_tx_fault, link_speed,
                            dcbx_status);

                        qla83xx_schedule_work(vha, QLA83XX_NIC_CORE_RESET);
                }

                if (mb[1] & IDC_HEARTBEAT_FAILURE) {
                        ql_log(ql_log_warn, vha, 0x5069,
                            "Heartbeat Failure encountered, chip reset "
                            "required.\n");

                        qla83xx_schedule_work(vha, QLA83XX_NIC_CORE_RESET);
                }
        }

        if (mb[1] & IDC_DEVICE_STATE_CHANGE) {
                ql_log(ql_log_info, vha, 0x506a,
                    "IDC Device-State changed = 0x%x.\n", mb[4]);
                if (ha->flags.nic_core_reset_owner)
                        return;
                qla83xx_schedule_work(vha, MBA_IDC_AEN);
        }
}

int
qla2x00_is_a_vp_did(scsi_qla_host_t *vha, uint32_t rscn_entry)
{
        struct qla_hw_data *ha = vha->hw;
        scsi_qla_host_t *vp;
        uint32_t vp_did;
        unsigned long flags;
        int ret = 0;

        if (!ha->num_vhosts)
                return ret;

        spin_lock_irqsave(&ha->vport_slock, flags);
        list_for_each_entry(vp, &ha->vp_list, list) {
                vp_did = vp->d_id.b24;
                if (vp_did == rscn_entry) {
                        ret = 1;
                        break;
                }
        }
        spin_unlock_irqrestore(&ha->vport_slock, flags);

        return ret;
}

fc_port_t *
qla2x00_find_fcport_by_loopid(scsi_qla_host_t *vha, uint16_t loop_id)
{
        fc_port_t *f, *tf;

        f = tf = NULL;
        list_for_each_entry_safe(f, tf, &vha->vp_fcports, list)
                if (f->loop_id == loop_id)
                        return f;
        return NULL;
}

fc_port_t *
qla2x00_find_fcport_by_wwpn(scsi_qla_host_t *vha, u8 *wwpn, u8 incl_deleted)
{
        fc_port_t *f, *tf;

        f = tf = NULL;
        list_for_each_entry_safe(f, tf, &vha->vp_fcports, list) {
                if (memcmp(f->port_name, wwpn, WWN_SIZE) == 0) {
                        if (incl_deleted)
                                return f;
                        else if (f->deleted == 0)
                                return f;
                }
        }
        return NULL;
}

fc_port_t *
qla2x00_find_fcport_by_nportid(scsi_qla_host_t *vha, port_id_t *id,
        u8 incl_deleted)
{
        fc_port_t *f, *tf;

        f = tf = NULL;
        list_for_each_entry_safe(f, tf, &vha->vp_fcports, list) {
                if (f->d_id.b24 == id->b24) {
                        if (incl_deleted)
                                return f;
                        else if (f->deleted == 0)
                                return f;
                }
        }
        return NULL;
}

/**
 * qla2x00_async_event() - Process aynchronous events.
 * @ha: SCSI driver HA context
 * @mb: Mailbox registers (0 - 3)
 */
void
qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
{
        uint16_t        handle_cnt;
        uint16_t        cnt, mbx;
        uint32_t        handles[5];
        struct qla_hw_data *ha = vha->hw;
        struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
        struct device_reg_24xx __iomem *reg24 = &ha->iobase->isp24;
        struct device_reg_82xx __iomem *reg82 = &ha->iobase->isp82;
        uint32_t        rscn_entry, host_pid;
        unsigned long   flags;
        fc_port_t       *fcport = NULL;

        /* Setup to process RIO completion. */
        handle_cnt = 0;
        if (IS_CNA_CAPABLE(ha))
                goto skip_rio;
        switch (mb[0]) {
        case MBA_SCSI_COMPLETION:
                handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
                handle_cnt = 1;
                break;
        case MBA_CMPLT_1_16BIT:
                handles[0] = mb[1];
                handle_cnt = 1;
                mb[0] = MBA_SCSI_COMPLETION;
                break;
        case MBA_CMPLT_2_16BIT:
                handles[0] = mb[1];
                handles[1] = mb[2];
                handle_cnt = 2;
                mb[0] = MBA_SCSI_COMPLETION;
                break;
        case MBA_CMPLT_3_16BIT:
                handles[0] = mb[1];
                handles[1] = mb[2];
                handles[2] = mb[3];
                handle_cnt = 3;
                mb[0] = MBA_SCSI_COMPLETION;
                break;
        case MBA_CMPLT_4_16BIT:
                handles[0] = mb[1];
                handles[1] = mb[2];
                handles[2] = mb[3];
                handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
                handle_cnt = 4;
                mb[0] = MBA_SCSI_COMPLETION;
                break;
        case MBA_CMPLT_5_16BIT:
                handles[0] = mb[1];
                handles[1] = mb[2];
                handles[2] = mb[3];
                handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
                handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
                handle_cnt = 5;
                mb[0] = MBA_SCSI_COMPLETION;
                break;
        case MBA_CMPLT_2_32BIT:
                handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
                handles[1] = le32_to_cpu(
                    ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
                    RD_MAILBOX_REG(ha, reg, 6));
                handle_cnt = 2;
                mb[0] = MBA_SCSI_COMPLETION;
                break;
        default:
                break;
        }
skip_rio:
        switch (mb[0]) {
        case MBA_SCSI_COMPLETION:       /* Fast Post */
                if (!vha->flags.online)
                        break;

                for (cnt = 0; cnt < handle_cnt; cnt++)
                        qla2x00_process_completed_request(vha, rsp->req,
                                handles[cnt]);
                break;

        case MBA_RESET:                 /* Reset */
                ql_dbg(ql_dbg_async, vha, 0x5002,
                    "Asynchronous RESET.\n");

                set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);
                break;

        case MBA_SYSTEM_ERR:            /* System Error */
                mbx = (IS_QLA81XX(ha) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) ?
                        RD_REG_WORD(&reg24->mailbox7) : 0;
                ql_log(ql_log_warn, vha, 0x5003,
                    "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh "
                    "mbx7=%xh.\n", mb[1], mb[2], mb[3], mbx);

                ha->isp_ops->fw_dump(vha, 1);
                ha->flags.fw_init_done = 0;
                QLA_FW_STOPPED(ha);

                if (IS_FWI2_CAPABLE(ha)) {
                        if (mb[1] == 0 && mb[2] == 0) {
                                ql_log(ql_log_fatal, vha, 0x5004,
                                    "Unrecoverable Hardware Error: adapter "
                                    "marked OFFLINE!\n");
                                vha->flags.online = 0;
                                vha->device_flags |= DFLG_DEV_FAILED;
                        } else {
                                /* Check to see if MPI timeout occurred */
                                if ((mbx & MBX_3) && (ha->port_no == 0))
                                        set_bit(MPI_RESET_NEEDED,
                                            &vha->dpc_flags);

                                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                        }
                } else if (mb[1] == 0) {
                        ql_log(ql_log_fatal, vha, 0x5005,
                            "Unrecoverable Hardware Error: adapter marked "
                            "OFFLINE!\n");
                        vha->flags.online = 0;
                        vha->device_flags |= DFLG_DEV_FAILED;
                } else
                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                break;

        case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
                ql_log(ql_log_warn, vha, 0x5006,
                    "ISP Request Transfer Error (%x).\n",  mb[1]);

                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                break;

        case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
                ql_log(ql_log_warn, vha, 0x5007,
                    "ISP Response Transfer Error (%x).\n", mb[1]);

                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                break;

        case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
                ql_dbg(ql_dbg_async, vha, 0x5008,
                    "Asynchronous WAKEUP_THRES (%x).\n", mb[1]);
                break;

        case MBA_LOOP_INIT_ERR:
                ql_log(ql_log_warn, vha, 0x5090,
                    "LOOP INIT ERROR (%x).\n", mb[1]);
                ha->isp_ops->fw_dump(vha, 1);
                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                break;

        case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
                ha->flags.lip_ae = 1;
                ha->flags.n2n_ae = 0;

                ql_dbg(ql_dbg_async, vha, 0x5009,
                    "LIP occurred (%x).\n", mb[1]);

                if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                        atomic_set(&vha->loop_state, LOOP_DOWN);
                        atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
                        qla2x00_mark_all_devices_lost(vha, 1);
                }

                if (vha->vp_idx) {
                        atomic_set(&vha->vp_state, VP_FAILED);
                        fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
                }

                set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
                set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);

                vha->flags.management_server_logged_in = 0;
                qla2x00_post_aen_work(vha, FCH_EVT_LIP, mb[1]);
                break;

        case MBA_LOOP_UP:               /* Loop Up Event */
                if (IS_QLA2100(ha) || IS_QLA2200(ha))
                        ha->link_data_rate = PORT_SPEED_1GB;
                else
                        ha->link_data_rate = mb[1];

                ql_log(ql_log_info, vha, 0x500a,
                    "LOOP UP detected (%s Gbps).\n",
                    qla2x00_get_link_speed_str(ha, ha->link_data_rate));

                vha->flags.management_server_logged_in = 0;
                qla2x00_post_aen_work(vha, FCH_EVT_LINKUP, ha->link_data_rate);

                if (AUTO_DETECT_SFP_SUPPORT(vha)) {
                        set_bit(DETECT_SFP_CHANGE, &vha->dpc_flags);
                        qla2xxx_wake_dpc(vha);
                }
                break;

        case MBA_LOOP_DOWN:             /* Loop Down Event */
                ha->flags.n2n_ae = 0;
                ha->flags.lip_ae = 0;
                ha->current_topology = 0;

                mbx = (IS_QLA81XX(ha) || IS_QLA8031(ha))
                        ? RD_REG_WORD(&reg24->mailbox4) : 0;
                mbx = (IS_P3P_TYPE(ha)) ? RD_REG_WORD(&reg82->mailbox_out[4])
                        : mbx;
                ql_log(ql_log_info, vha, 0x500b,
                    "LOOP DOWN detected (%x %x %x %x).\n",
                    mb[1], mb[2], mb[3], mbx);

                if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                        atomic_set(&vha->loop_state, LOOP_DOWN);
                        atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
                        /*
                         * In case of loop down, restore WWPN from
                         * NVRAM in case of FA-WWPN capable ISP
                         * Restore for Physical Port only
                         */
                        if (!vha->vp_idx) {
                                if (ha->flags.fawwpn_enabled) {
                                        void *wwpn = ha->init_cb->port_name;
                                        memcpy(vha->port_name, wwpn, WWN_SIZE);
                                        fc_host_port_name(vha->host) =
                                            wwn_to_u64(vha->port_name);
                                        ql_dbg(ql_dbg_init + ql_dbg_verbose,
                                            vha, 0x00d8, "LOOP DOWN detected,"
                                            "restore WWPN %016llx\n",
                                            wwn_to_u64(vha->port_name));
                                }

                                clear_bit(VP_CONFIG_OK, &vha->vp_flags);
                        }

                        vha->device_flags |= DFLG_NO_CABLE;
                        qla2x00_mark_all_devices_lost(vha, 1);
                }

                if (vha->vp_idx) {
                        atomic_set(&vha->vp_state, VP_FAILED);
                        fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
                }

                vha->flags.management_server_logged_in = 0;
                ha->link_data_rate = PORT_SPEED_UNKNOWN;
                qla2x00_post_aen_work(vha, FCH_EVT_LINKDOWN, 0);
                break;

        case MBA_LIP_RESET:             /* LIP reset occurred */
                ql_dbg(ql_dbg_async, vha, 0x500c,
                    "LIP reset occurred (%x).\n", mb[1]);

                if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                        atomic_set(&vha->loop_state, LOOP_DOWN);
                        atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
                        qla2x00_mark_all_devices_lost(vha, 1);
                }

                if (vha->vp_idx) {
                        atomic_set(&vha->vp_state, VP_FAILED);
                        fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
                }

                set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);

                ha->operating_mode = LOOP;
                vha->flags.management_server_logged_in = 0;
                qla2x00_post_aen_work(vha, FCH_EVT_LIPRESET, mb[1]);
                break;

        /* case MBA_DCBX_COMPLETE: */
        case MBA_POINT_TO_POINT:        /* Point-to-Point */
                ha->flags.lip_ae = 0;
                ha->flags.n2n_ae = 1;

                if (IS_QLA2100(ha))
                        break;

                if (IS_CNA_CAPABLE(ha)) {
                        ql_dbg(ql_dbg_async, vha, 0x500d,
                            "DCBX Completed -- %04x %04x %04x.\n",
                            mb[1], mb[2], mb[3]);
                        if (ha->notify_dcbx_comp && !vha->vp_idx)
                                complete(&ha->dcbx_comp);

                } else
                        ql_dbg(ql_dbg_async, vha, 0x500e,
                            "Asynchronous P2P MODE received.\n");

                /*
                 * Until there's a transition from loop down to loop up, treat
                 * this as loop down only.
                 */
                if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                        atomic_set(&vha->loop_state, LOOP_DOWN);
                        if (!atomic_read(&vha->loop_down_timer))
                                atomic_set(&vha->loop_down_timer,
                                    LOOP_DOWN_TIME);
                        qla2x00_mark_all_devices_lost(vha, 1);
                }

                if (vha->vp_idx) {
                        atomic_set(&vha->vp_state, VP_FAILED);
                        fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
                }

                if (!(test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags)))
                        set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);

                set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
                set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);

                ha->flags.gpsc_supported = 1;
                vha->flags.management_server_logged_in = 0;
                break;

        case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
                if (IS_QLA2100(ha))
                        break;

                ql_dbg(ql_dbg_async, vha, 0x500f,
                    "Configuration change detected: value=%x.\n", mb[1]);

                if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                        atomic_set(&vha->loop_state, LOOP_DOWN);
                        if (!atomic_read(&vha->loop_down_timer))
                                atomic_set(&vha->loop_down_timer,
                                    LOOP_DOWN_TIME);
                        qla2x00_mark_all_devices_lost(vha, 1);
                }

                if (vha->vp_idx) {
                        atomic_set(&vha->vp_state, VP_FAILED);
                        fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
                }

                set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
                set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
                break;

        case MBA_PORT_UPDATE:           /* Port database update */
                /*
                 * Handle only global and vn-port update events
                 *
                 * Relevant inputs:
                 * mb[1] = N_Port handle of changed port
                 * OR 0xffff for global event
                 * mb[2] = New login state
                 * 7 = Port logged out
                 * mb[3] = LSB is vp_idx, 0xff = all vps
                 *
                 * Skip processing if:
                 *       Event is global, vp_idx is NOT all vps,
                 *           vp_idx does not match
                 *       Event is not global, vp_idx does not match
                 */
                if (IS_QLA2XXX_MIDTYPE(ha) &&
                    ((mb[1] == 0xffff && (mb[3] & 0xff) != 0xff) ||
                        (mb[1] != 0xffff)) && vha->vp_idx != (mb[3] & 0xff))
                        break;

                if (mb[2] == 0x7) {
                        ql_dbg(ql_dbg_async, vha, 0x5010,
                            "Port %s %04x %04x %04x.\n",
                            mb[1] == 0xffff ? "unavailable" : "logout",
                            mb[1], mb[2], mb[3]);

                        if (mb[1] == 0xffff)
                                goto global_port_update;

                        if (mb[1] == NPH_SNS_LID(ha)) {
                                set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
                                set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
                                break;
                        }

                        /* use handle_cnt for loop id/nport handle */
                        if (IS_FWI2_CAPABLE(ha))
                                handle_cnt = NPH_SNS;
                        else
                                handle_cnt = SIMPLE_NAME_SERVER;
                        if (mb[1] == handle_cnt) {
                                set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
                                set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
                                break;
                        }

                        /* Port logout */

                        fcport = qla2x00_find_fcport_by_loopid(vha, mb[1]);
                        if (!fcport)
                                break;
                        if (atomic_read(&fcport->state) != FCS_ONLINE)
                                break;
                        ql_dbg(ql_dbg_async, vha, 0x508a,
                            "Marking port lost loopid=%04x portid=%06x.\n",
                            fcport->loop_id, fcport->d_id.b24);
                        if (qla_ini_mode_enabled(vha)) {
                                qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1);
                                fcport->logout_on_delete = 0;
                                qlt_schedule_sess_for_deletion_lock(fcport);
                        }
                        break;

global_port_update:
                        if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                                atomic_set(&vha->loop_state, LOOP_DOWN);
                                atomic_set(&vha->loop_down_timer,
                                    LOOP_DOWN_TIME);
                                vha->device_flags |= DFLG_NO_CABLE;
                                qla2x00_mark_all_devices_lost(vha, 1);
                        }

                        if (vha->vp_idx) {
                                atomic_set(&vha->vp_state, VP_FAILED);
                                fc_vport_set_state(vha->fc_vport,
                                    FC_VPORT_FAILED);
                                qla2x00_mark_all_devices_lost(vha, 1);
                        }

                        vha->flags.management_server_logged_in = 0;
                        ha->link_data_rate = PORT_SPEED_UNKNOWN;
                        break;
                }

                /*
                 * If PORT UPDATE is global (received LIP_OCCURRED/LIP_RESET
                 * event etc. earlier indicating loop is down) then process
                 * it.  Otherwise ignore it and Wait for RSCN to come in.
                 */
                atomic_set(&vha->loop_down_timer, 0);
                if (atomic_read(&vha->loop_state) != LOOP_DOWN &&
                        !ha->flags.n2n_ae  &&
                    atomic_read(&vha->loop_state) != LOOP_DEAD) {
                        ql_dbg(ql_dbg_async, vha, 0x5011,
                            "Asynchronous PORT UPDATE ignored %04x/%04x/%04x.\n",
                            mb[1], mb[2], mb[3]);

                        qlt_async_event(mb[0], vha, mb);
                        break;
                }

                ql_dbg(ql_dbg_async, vha, 0x5012,
                    "Port database changed %04x %04x %04x.\n",
                    mb[1], mb[2], mb[3]);

                /*
                 * Mark all devices as missing so we will login again.
                 */
                atomic_set(&vha->loop_state, LOOP_UP);

                qla2x00_mark_all_devices_lost(vha, 1);

                set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
                set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
                set_bit(VP_CONFIG_OK, &vha->vp_flags);

                qlt_async_event(mb[0], vha, mb);
                break;

        case MBA_RSCN_UPDATE:           /* State Change Registration */
                /* Check if the Vport has issued a SCR */
                if (vha->vp_idx && test_bit(VP_SCR_NEEDED, &vha->vp_flags))
                        break;
                /* Only handle SCNs for our Vport index. */
                if (ha->flags.npiv_supported && vha->vp_idx != (mb[3] & 0xff))
                        break;

                ql_dbg(ql_dbg_async, vha, 0x5013,
                    "RSCN database changed -- %04x %04x %04x.\n",
                    mb[1], mb[2], mb[3]);

                rscn_entry = ((mb[1] & 0xff) << 16) | mb[2];
                host_pid = (vha->d_id.b.domain << 16) | (vha->d_id.b.area << 8)
                                | vha->d_id.b.al_pa;
                if (rscn_entry == host_pid) {
                        ql_dbg(ql_dbg_async, vha, 0x5014,
                            "Ignoring RSCN update to local host "
                            "port ID (%06x).\n", host_pid);
                        break;
                }

                /* Ignore reserved bits from RSCN-payload. */
                rscn_entry = ((mb[1] & 0x3ff) << 16) | mb[2];

                /* Skip RSCNs for virtual ports on the same physical port */
                if (qla2x00_is_a_vp_did(vha, rscn_entry))
                        break;

                atomic_set(&vha->loop_down_timer, 0);
                vha->flags.management_server_logged_in = 0;
                {
                        struct event_arg ea;

                        memset(&ea, 0, sizeof(ea));
                        ea.event = FCME_RSCN;
                        ea.id.b24 = rscn_entry;
                        ea.id.b.rsvd_1 = rscn_entry >> 24;
                        qla2x00_fcport_event_handler(vha, &ea);
                        qla2x00_post_aen_work(vha, FCH_EVT_RSCN, rscn_entry);
                }
                break;
        /* case MBA_RIO_RESPONSE: */
        case MBA_ZIO_RESPONSE:
                ql_dbg(ql_dbg_async, vha, 0x5015,
                    "[R|Z]IO update completion.\n");

                if (IS_FWI2_CAPABLE(ha))
                        qla24xx_process_response_queue(vha, rsp);
                else
                        qla2x00_process_response_queue(rsp);
                break;

        case MBA_DISCARD_RND_FRAME:
                ql_dbg(ql_dbg_async, vha, 0x5016,
                    "Discard RND Frame -- %04x %04x %04x.\n",
                    mb[1], mb[2], mb[3]);
                break;

        case MBA_TRACE_NOTIFICATION:
                ql_dbg(ql_dbg_async, vha, 0x5017,
                    "Trace Notification -- %04x %04x.\n", mb[1], mb[2]);
                break;

        case MBA_ISP84XX_ALERT:
                ql_dbg(ql_dbg_async, vha, 0x5018,
                    "ISP84XX Alert Notification -- %04x %04x %04x.\n",
                    mb[1], mb[2], mb[3]);

                spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
                switch (mb[1]) {
                case A84_PANIC_RECOVERY:
                        ql_log(ql_log_info, vha, 0x5019,
                            "Alert 84XX: panic recovery %04x %04x.\n",
                            mb[2], mb[3]);
                        break;
                case A84_OP_LOGIN_COMPLETE:
                        ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
                        ql_log(ql_log_info, vha, 0x501a,
                            "Alert 84XX: firmware version %x.\n",
                            ha->cs84xx->op_fw_version);
                        break;
                case A84_DIAG_LOGIN_COMPLETE:
                        ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
                        ql_log(ql_log_info, vha, 0x501b,
                            "Alert 84XX: diagnostic firmware version %x.\n",
                            ha->cs84xx->diag_fw_version);
                        break;
                case A84_GOLD_LOGIN_COMPLETE:
                        ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
                        ha->cs84xx->fw_update = 1;
                        ql_log(ql_log_info, vha, 0x501c,
                            "Alert 84XX: gold firmware version %x.\n",
                            ha->cs84xx->gold_fw_version);
                        break;
                default:
                        ql_log(ql_log_warn, vha, 0x501d,
                            "Alert 84xx: Invalid Alert %04x %04x %04x.\n",
                            mb[1], mb[2], mb[3]);
                }
                spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
                break;
        case MBA_DCBX_START:
                ql_dbg(ql_dbg_async, vha, 0x501e,
                    "DCBX Started -- %04x %04x %04x.\n",
                    mb[1], mb[2], mb[3]);
                break;
        case MBA_DCBX_PARAM_UPDATE:
                ql_dbg(ql_dbg_async, vha, 0x501f,
                    "DCBX Parameters Updated -- %04x %04x %04x.\n",
                    mb[1], mb[2], mb[3]);
                break;
        case MBA_FCF_CONF_ERR:
                ql_dbg(ql_dbg_async, vha, 0x5020,
                    "FCF Configuration Error -- %04x %04x %04x.\n",
                    mb[1], mb[2], mb[3]);
                break;
        case MBA_IDC_NOTIFY:
                if (IS_QLA8031(vha->hw) || IS_QLA8044(ha)) {
                        mb[4] = RD_REG_WORD(&reg24->mailbox4);
                        if (((mb[2] & 0x7fff) == MBC_PORT_RESET ||
                            (mb[2] & 0x7fff) == MBC_SET_PORT_CONFIG) &&
                            (mb[4] & INTERNAL_LOOPBACK_MASK) != 0) {
                                set_bit(ISP_QUIESCE_NEEDED, &vha->dpc_flags);
                                /*
                                 * Extend loop down timer since port is active.
                                 */
                                if (atomic_read(&vha->loop_state) == LOOP_DOWN)
                                        atomic_set(&vha->loop_down_timer,
                                            LOOP_DOWN_TIME);
                                qla2xxx_wake_dpc(vha);
                        }
                }
        case MBA_IDC_COMPLETE:
                if (ha->notify_lb_portup_comp && !vha->vp_idx)
                        complete(&ha->lb_portup_comp);
                /* Fallthru */
        case MBA_IDC_TIME_EXT:
                if (IS_QLA81XX(vha->hw) || IS_QLA8031(vha->hw) ||
                    IS_QLA8044(ha))
                        qla81xx_idc_event(vha, mb[0], mb[1]);
                break;

        case MBA_IDC_AEN:
                mb[4] = RD_REG_WORD(&reg24->mailbox4);
                mb[5] = RD_REG_WORD(&reg24->mailbox5);
                mb[6] = RD_REG_WORD(&reg24->mailbox6);
                mb[7] = RD_REG_WORD(&reg24->mailbox7);
                qla83xx_handle_8200_aen(vha, mb);
                break;

        case MBA_DPORT_DIAGNOSTICS:
                ql_dbg(ql_dbg_async, vha, 0x5052,
                    "D-Port Diagnostics: %04x result=%s\n",
                    mb[0],
                    mb[1] == 0 ? "start" :
                    mb[1] == 1 ? "done (pass)" :
                    mb[1] == 2 ? "done (error)" : "other");
                break;

        case MBA_TEMPERATURE_ALERT:
                ql_dbg(ql_dbg_async, vha, 0x505e,
                    "TEMPERATURE ALERT: %04x %04x %04x\n", mb[1], mb[2], mb[3]);
                if (mb[1] == 0x12)
                        schedule_work(&ha->board_disable);
                break;

        case MBA_TRANS_INSERT:
                ql_dbg(ql_dbg_async, vha, 0x5091,
                    "Transceiver Insertion: %04x\n", mb[1]);
                break;

        default:
                ql_dbg(ql_dbg_async, vha, 0x5057,
                    "Unknown AEN:%04x %04x %04x %04x\n",
                    mb[0], mb[1], mb[2], mb[3]);
        }

        qlt_async_event(mb[0], vha, mb);

        if (!vha->vp_idx && ha->num_vhosts)
                qla2x00_alert_all_vps(rsp, mb);
}

/**
 * qla2x00_process_completed_request() - Process a Fast Post response.
 * @ha: SCSI driver HA context
 * @index: SRB index
 */
void
qla2x00_process_completed_request(struct scsi_qla_host *vha,
                                  struct req_que *req, uint32_t index)
{
        srb_t *sp;
        struct qla_hw_data *ha = vha->hw;

        /* Validate handle. */
        if (index >= req->num_outstanding_cmds) {
                ql_log(ql_log_warn, vha, 0x3014,
                    "Invalid SCSI command index (%x).\n", index);

                if (IS_P3P_TYPE(ha))
                        set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
                else
                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                return;
        }

        sp = req->outstanding_cmds[index];
        if (sp) {
                /* Free outstanding command slot. */
                req->outstanding_cmds[index] = NULL;

                /* Save ISP completion status */
                sp->done(sp, DID_OK << 16);
        } else {
                ql_log(ql_log_warn, vha, 0x3016, "Invalid SCSI SRB.\n");

                if (IS_P3P_TYPE(ha))
                        set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
                else
                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
        }
}

srb_t *
qla2x00_get_sp_from_handle(scsi_qla_host_t *vha, const char *func,
    struct req_que *req, void *iocb)
{
        struct qla_hw_data *ha = vha->hw;
        sts_entry_t *pkt = iocb;
        srb_t *sp = NULL;
        uint16_t index;

        index = LSW(pkt->handle);
        if (index >= req->num_outstanding_cmds) {
                ql_log(ql_log_warn, vha, 0x5031,
                           "Invalid command index (%x) type %8ph.\n",
                           index, iocb);
                if (IS_P3P_TYPE(ha))
                        set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
                else
                        set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                goto done;
        }
        sp = req->outstanding_cmds[index];
        if (!sp) {
                ql_log(ql_log_warn, vha, 0x5032,
                    "Invalid completion handle (%x) -- timed-out.\n", index);
                return sp;
        }
        if (sp->handle != index) {
                ql_log(ql_log_warn, vha, 0x5033,
                    "SRB handle (%x) mismatch %x.\n", sp->handle, index);
                return NULL;
        }

        req->outstanding_cmds[index] = NULL;

done:
        return sp;
}

static void
qla2x00_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
    struct mbx_entry *mbx)
{
        const char func[] = "MBX-IOCB";
        const char *type;
        fc_port_t *fcport;
        srb_t *sp;
        struct srb_iocb *lio;
        uint16_t *data;
        uint16_t status;

        sp = qla2x00_get_sp_from_handle(vha, func, req, mbx);
        if (!sp)
                return;

        lio = &sp->u.iocb_cmd;
        type = sp->name;
        fcport = sp->fcport;
        data = lio->u.logio.data;

        data[0] = MBS_COMMAND_ERROR;
        data[1] = lio->u.logio.flags & SRB_LOGIN_RETRIED ?
            QLA_LOGIO_LOGIN_RETRIED : 0;
        if (mbx->entry_status) {
                ql_dbg(ql_dbg_async, vha, 0x5043,
                    "Async-%s error entry - hdl=%x portid=%02x%02x%02x "
                    "entry-status=%x status=%x state-flag=%x "
                    "status-flags=%x.\n", type, sp->handle,
                    fcport->d_id.b.domain, fcport->d_id.b.area,
                    fcport->d_id.b.al_pa, mbx->entry_status,
                    le16_to_cpu(mbx->status), le16_to_cpu(mbx->state_flags),
                    le16_to_cpu(mbx->status_flags));

                ql_dump_buffer(ql_dbg_async + ql_dbg_buffer, vha, 0x5029,
                    (uint8_t *)mbx, sizeof(*mbx));

                goto logio_done;
        }

        status = le16_to_cpu(mbx->status);
        if (status == 0x30 && sp->type == SRB_LOGIN_CMD &&
            le16_to_cpu(mbx->mb0) == MBS_COMMAND_COMPLETE)
                status = 0;
        if (!status && le16_to_cpu(mbx->mb0) == MBS_COMMAND_COMPLETE) {
                ql_dbg(ql_dbg_async, vha, 0x5045,
                    "Async-%s complete - hdl=%x portid=%02x%02x%02x mbx1=%x.\n",
                    type, sp->handle, fcport->d_id.b.domain,
                    fcport->d_id.b.area, fcport->d_id.b.al_pa,
                    le16_to_cpu(mbx->mb1));

                data[0] = MBS_COMMAND_COMPLETE;
                if (sp->type == SRB_LOGIN_CMD) {
                        fcport->port_type = FCT_TARGET;
                        if (le16_to_cpu(mbx->mb1) & BIT_0)
                                fcport->port_type = FCT_INITIATOR;
                        else if (le16_to_cpu(mbx->mb1) & BIT_1)
                                fcport->flags |= FCF_FCP2_DEVICE;
                }
                goto logio_done;
        }

        data[0] = le16_to_cpu(mbx->mb0);
        switch (data[0]) {
        case MBS_PORT_ID_USED:
                data[1] = le16_to_cpu(mbx->mb1);
                break;
        case MBS_LOOP_ID_USED:
                break;
        default:
                data[0] = MBS_COMMAND_ERROR;
                break;
        }

        ql_log(ql_log_warn, vha, 0x5046,
            "Async-%s failed - hdl=%x portid=%02x%02x%02x status=%x "
            "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n", type, sp->handle,
            fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa,
            status, le16_to_cpu(mbx->mb0), le16_to_cpu(mbx->mb1),
            le16_to_cpu(mbx->mb2), le16_to_cpu(mbx->mb6),
            le16_to_cpu(mbx->mb7));

logio_done:
        sp->done(sp, 0);
}

static void
qla24xx_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
    struct mbx_24xx_entry *pkt)
{
        const char func[] = "MBX-IOCB2";
        srb_t *sp;
        struct srb_iocb *si;
        u16 sz, i;
        int res;

        sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
        if (!sp)
                return;

        si = &sp->u.iocb_cmd;
        sz = min(ARRAY_SIZE(pkt->mb), ARRAY_SIZE(sp->u.iocb_cmd.u.mbx.in_mb));

        for (i = 0; i < sz; i++)
                si->u.mbx.in_mb[i] = le16_to_cpu(pkt->mb[i]);

        res = (si->u.mbx.in_mb[0] & MBS_MASK);

        sp->done(sp, res);
}

static void
qla24xxx_nack_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
    struct nack_to_isp *pkt)
{
        const char func[] = "nack";
        srb_t *sp;
        int res = 0;

        sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
        if (!sp)
                return;

        if (pkt->u.isp2x.status != cpu_to_le16(NOTIFY_ACK_SUCCESS))
                res = QLA_FUNCTION_FAILED;

        sp->done(sp, res);
}

static void
qla2x00_ct_entry(scsi_qla_host_t *vha, struct req_que *req,
    sts_entry_t *pkt, int iocb_type)
{
        const char func[] = "CT_IOCB";
        const char *type;
        srb_t *sp;
        struct bsg_job *bsg_job;
        struct fc_bsg_reply *bsg_reply;
        uint16_t comp_status;
        int res = 0;

        sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
        if (!sp)
                return;

        switch (sp->type) {
        case SRB_CT_CMD:
            bsg_job = sp->u.bsg_job;
            bsg_reply = bsg_job->reply;

            type = "ct pass-through";

            comp_status = le16_to_cpu(pkt->comp_status);

            /*
             * return FC_CTELS_STATUS_OK and leave the decoding of the ELS/CT
             * fc payload  to the caller
             */
            bsg_reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
            bsg_job->reply_len = sizeof(struct fc_bsg_reply);

            if (comp_status != CS_COMPLETE) {
                    if (comp_status == CS_DATA_UNDERRUN) {
                            res = DID_OK << 16;
                            bsg_reply->reply_payload_rcv_len =
                                le16_to_cpu(((sts_entry_t *)pkt)->rsp_info_len);

                            ql_log(ql_log_warn, vha, 0x5048,
                                "CT pass-through-%s error comp_status=0x%x total_byte=0x%x.\n",
                                type, comp_status,
                                bsg_reply->reply_payload_rcv_len);
                    } else {
                            ql_log(ql_log_warn, vha, 0x5049,
                                "CT pass-through-%s error comp_status=0x%x.\n",
                                type, comp_status);
                            res = DID_ERROR << 16;
                            bsg_reply->reply_payload_rcv_len = 0;
                    }
                    ql_dump_buffer(ql_dbg_async + ql_dbg_buffer, vha, 0x5035,
                        (uint8_t *)pkt, sizeof(*pkt));
            } else {
                    res = DID_OK << 16;
                    bsg_reply->reply_payload_rcv_len =
                        bsg_job->reply_payload.payload_len;
                    bsg_job->reply_len = 0;
            }
            break;
        case SRB_CT_PTHRU_CMD:
            /*
             * borrowing sts_entry_24xx.comp_status.
             * same location as ct_entry_24xx.comp_status
             */
             res = qla2x00_chk_ms_status(vha, (ms_iocb_entry_t *)pkt,
                 (struct ct_sns_rsp *)sp->u.iocb_cmd.u.ctarg.rsp,
                 sp->name);
             break;
        }

        sp->done(sp, res);
}

static void
qla24xx_els_ct_entry(scsi_qla_host_t *vha, struct req_que *req,
    struct sts_entry_24xx *pkt, int iocb_type)
{
        const char func[] = "ELS_CT_IOCB";
        const char *type;
        srb_t *sp;
        struct bsg_job *bsg_job;
        struct fc_bsg_reply *bsg_reply;
        uint16_t comp_status;
        uint32_t fw_status[3];
        int res;
        struct srb_iocb *els;

        sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
        if (!sp)
                return;

        type = NULL;
        switch (sp->type) {
        case SRB_ELS_CMD_RPT:
        case SRB_ELS_CMD_HST:
                type = "els";
                break;
        case SRB_CT_CMD:
                type = "ct pass-through";
                break;
        case SRB_ELS_DCMD:
                type = "Driver ELS logo";
                if (iocb_type != ELS_IOCB_TYPE) {
                        ql_dbg(ql_dbg_user, vha, 0x5047,
                            "Completing %s: (%p) type=%d.\n",
                            type, sp, sp->type);
                        sp->done(sp, 0);
                        return;
                }
                break;
        case SRB_CT_PTHRU_CMD:
                /* borrowing sts_entry_24xx.comp_status.
                   same location as ct_entry_24xx.comp_status
                 */
                res = qla2x00_chk_ms_status(vha, (ms_iocb_entry_t *)pkt,
                        (struct ct_sns_rsp *)sp->u.iocb_cmd.u.ctarg.rsp,
                        sp->name);
                sp->done(sp, res);
                return;
        default:
                ql_dbg(ql_dbg_user, vha, 0x503e,
                    "Unrecognized SRB: (%p) type=%d.\n", sp, sp->type);
                return;
        }

        comp_status = fw_status[0] = le16_to_cpu(pkt->comp_status);
        fw_status[1] = le16_to_cpu(((struct els_sts_entry_24xx*)pkt)->error_subcode_1);
        fw_status[2] = le16_to_cpu(((struct els_sts_entry_24xx*)pkt)->error_subcode_2);

        if (iocb_type == ELS_IOCB_TYPE) {
                els = &sp->u.iocb_cmd;
                els->u.els_plogi.fw_status[0] = fw_status[0];
                els->u.els_plogi.fw_status[1] = fw_status[1];
                els->u.els_plogi.fw_status[2] = fw_status[2];
                els->u.els_plogi.comp_status = fw_status[0];
                if (comp_status == CS_COMPLETE) {
                        res =  DID_OK << 16;
                } else {
                        if (comp_status == CS_DATA_UNDERRUN) {
                                res =  DID_OK << 16;
                                els->u.els_plogi.len =
                                le16_to_cpu(((struct els_sts_entry_24xx *)
                                        pkt)->total_byte_count);
                        } else {
                                els->u.els_plogi.len = 0;
                                res = DID_ERROR << 16;
                        }
                }
                ql_log(ql_log_info, vha, 0x503f,
                    "ELS IOCB Done -%s error hdl=%x comp_status=0x%x error subcode 1=0x%x error subcode 2=0x%x total_byte=0x%x\n",
                    type, sp->handle, comp_status, fw_status[1], fw_status[2],
                    le16_to_cpu(((struct els_sts_entry_24xx *)
                        pkt)->total_byte_count));
                goto els_ct_done;
        }

        /* return FC_CTELS_STATUS_OK and leave the decoding of the ELS/CT
         * fc payload  to the caller
         */
        bsg_job = sp->u.bsg_job;
        bsg_reply = bsg_job->reply;
        bsg_reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
        bsg_job->reply_len = sizeof(struct fc_bsg_reply) + sizeof(fw_status);

        if (comp_status != CS_COMPLETE) {
                if (comp_status == CS_DATA_UNDERRUN) {
                        res = DID_OK << 16;
                        bsg_reply->reply_payload_rcv_len =
                            le16_to_cpu(((struct els_sts_entry_24xx *)pkt)->total_byte_count);

                        ql_dbg(ql_dbg_user, vha, 0x503f,
                            "ELS-CT pass-through-%s error hdl=%x comp_status-status=0x%x "
                            "error subcode 1=0x%x error subcode 2=0x%x total_byte = 0x%x.\n",
                            type, sp->handle, comp_status, fw_status[1], fw_status[2],
                            le16_to_cpu(((struct els_sts_entry_24xx *)
                                pkt)->total_byte_count));
                } else {
                        ql_dbg(ql_dbg_user, vha, 0x5040,
                            "ELS-CT pass-through-%s error hdl=%x comp_status-status=0x%x "
                            "error subcode 1=0x%x error subcode 2=0x%x.\n",
                            type, sp->handle, comp_status,
                            le16_to_cpu(((struct els_sts_entry_24xx *)
                                pkt)->error_subcode_1),
                            le16_to_cpu(((struct els_sts_entry_24xx *)
                                    pkt)->error_subcode_2));
                        res = DID_ERROR << 16;
                        bsg_reply->reply_payload_rcv_len = 0;
                }
                memcpy(bsg_job->reply + sizeof(struct fc_bsg_reply),
                       fw_status, sizeof(fw_status));
                ql_dump_buffer(ql_dbg_user + ql_dbg_buffer, vha, 0x5056,
                                (uint8_t *)pkt, sizeof(*pkt));
        }
        else {
                res =  DID_OK << 16;
                bsg_reply->reply_payload_rcv_len = bsg_job->reply_payload.payload_len;
                bsg_job->reply_len = 0;
        }
els_ct_done:

        sp->done(sp, res);
}

static void
qla24xx_logio_entry(scsi_qla_host_t *vha, struct req_que *req,
    struct logio_entry_24xx *logio)
{
        const char func[] = "LOGIO-IOCB";
        const char *type;
        fc_port_t *fcport;
        srb_t *sp;
        struct srb_iocb *lio;
        uint16_t *data;
        uint32_t iop[2];

        sp = qla2x00_get_sp_from_handle(vha, func, req, logio);
        if (!sp)
                return;

        lio = &sp->u.iocb_cmd;
        type = sp->name;
        fcport = sp->fcport;
        data = lio->u.logio.data;

        data[0] = MBS_COMMAND_ERROR;
        data[1] = lio->u.logio.flags & SRB_LOGIN_RETRIED ?
                QLA_LOGIO_LOGIN_RETRIED : 0;
        if (logio->entry_status) {
                ql_log(ql_log_warn, fcport->vha, 0x5034,
                    "Async-%s error entry - %8phC hdl=%x"
                    "portid=%02x%02x%02x entry-status=%x.\n",
                    type, fcport->port_name, sp->handle, fcport->d_id.b.domain,
                    fcport->d_id.b.area, fcport->d_id.b.al_pa,
                    logio->entry_status);
                ql_dump_buffer(ql_dbg_async + ql_dbg_buffer, vha, 0x504d,
                    (uint8_t *)logio, sizeof(*logio));

                goto logio_done;
        }

        if (le16_to_cpu(logio->comp_status) == CS_COMPLETE) {
                ql_dbg(ql_dbg_async, fcport->vha, 0x5036,
                    "Async-%s complete - %8phC hdl=%x portid=%02x%02x%02x "
                    "iop0=%x.\n", type, fcport->port_name, sp->handle,
                    fcport->d_id.b.domain,
                    fcport->d_id.b.area, fcport->d_id.b.al_pa,
                    le32_to_cpu(logio->io_parameter[0]));

                vha->hw->exch_starvation = 0;
                data[0] = MBS_COMMAND_COMPLETE;
                if (sp->type != SRB_LOGIN_CMD)
                        goto logio_done;

                iop[0] = le32_to_cpu(logio->io_parameter[0]);
                if (iop[0] & BIT_4) {
                        fcport->port_type = FCT_TARGET;
                        if (iop[0] & BIT_8)
                                fcport->flags |= FCF_FCP2_DEVICE;
                } else if (iop[0] & BIT_5)
                        fcport->port_type = FCT_INITIATOR;

                if (iop[0] & BIT_7)
                        fcport->flags |= FCF_CONF_COMP_SUPPORTED;

                if (logio->io_parameter[7] || logio->io_parameter[8])
                        fcport->supported_classes |= FC_COS_CLASS2;
                if (logio->io_parameter[9] || logio->io_parameter[10])
                        fcport->supported_classes |= FC_COS_CLASS3;

                goto logio_done;
        }

        iop[0] = le32_to_cpu(logio->io_parameter[0]);
        iop[1] = le32_to_cpu(logio->io_parameter[1]);
        lio->u.logio.iop[0] = iop[0];
        lio->u.logio.iop[1] = iop[1];
        switch (iop[0]) {
        case LSC_SCODE_PORTID_USED:
                data[0] = MBS_PORT_ID_USED;
                data[1] = LSW(iop[1]);
                break;
        case LSC_SCODE_NPORT_USED:
                data[0] = MBS_LOOP_ID_USED;
                break;
        case LSC_SCODE_CMD_FAILED:
                if (iop[1] == 0x0606) {
                        /*
                         * PLOGI/PRLI Completed. We must have Recv PLOGI/PRLI,
                         * Target side acked.
                         */
                        data[0] = MBS_COMMAND_COMPLETE;
                        goto logio_done;
                }
                data[0] = MBS_COMMAND_ERROR;
                break;
        case LSC_SCODE_NOXCB:
                vha->hw->exch_starvation++;
                if (vha->hw->exch_starvation > 5) {
                        ql_log(ql_log_warn, vha, 0xd046,
                            "Exchange starvation. Resetting RISC\n");

                        vha->hw->exch_starvation = 0;

                        if (IS_P3P_TYPE(vha->hw))
                                set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
                        else
                                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                        qla2xxx_wake_dpc(vha);
                }
                /* drop through */
        default:
                data[0] = MBS_COMMAND_ERROR;
                break;
        }

        ql_dbg(ql_dbg_async, fcport->vha, 0x5037,
            "Async-%s failed - %8phC hdl=%x portid=%02x%02x%02x comp=%x "
            "iop0=%x iop1=%x.\n", type, fcport->port_name,
                sp->handle, fcport->d_id.b.domain,
            fcport->d_id.b.area, fcport->d_id.b.al_pa,
            le16_to_cpu(logio->comp_status),
            le32_to_cpu(logio->io_parameter[0]),
            le32_to_cpu(logio->io_parameter[1]));

logio_done:
        sp->done(sp, 0);
}

static void
qla24xx_tm_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, void *tsk)
{
        const char func[] = "TMF-IOCB";
        const char *type;
        fc_port_t *fcport;
        srb_t *sp;
        struct srb_iocb *iocb;
        struct sts_entry_24xx *sts = (struct sts_entry_24xx *)tsk;

        sp = qla2x00_get_sp_from_handle(vha, func, req, tsk);
        if (!sp)
                return;

        iocb = &sp->u.iocb_cmd;
        type = sp->name;
        fcport = sp->fcport;
        iocb->u.tmf.data = QLA_SUCCESS;

        if (sts->entry_status) {
                ql_log(ql_log_warn, fcport->vha, 0x5038,
                    "Async-%s error - hdl=%x entry-status(%x).\n",
                    type, sp->handle, sts->entry_status);
                iocb->u.tmf.data = QLA_FUNCTION_FAILED;
        } else if (sts->comp_status != cpu_to_le16(CS_COMPLETE)) {
                ql_log(ql_log_warn, fcport->vha, 0x5039,
                    "Async-%s error - hdl=%x completion status(%x).\n",
                    type, sp->handle, sts->comp_status);
                iocb->u.tmf.data = QLA_FUNCTION_FAILED;
        } else if ((le16_to_cpu(sts->scsi_status) &
            SS_RESPONSE_INFO_LEN_VALID)) {
                if (le32_to_cpu(sts->rsp_data_len) < 4) {
                        ql_log(ql_log_warn, fcport->vha, 0x503b,
                            "Async-%s error - hdl=%x not enough response(%d).\n",
                            type, sp->handle, sts->rsp_data_len);
                } else if (sts->data[3]) {
                        ql_log(ql_log_warn, fcport->vha, 0x503c,
                            "Async-%s error - hdl=%x response(%x).\n",
                            type, sp->handle, sts->data[3]);
                        iocb->u.tmf.data = QLA_FUNCTION_FAILED;
                }
        }

        if (iocb->u.tmf.data != QLA_SUCCESS)
                ql_dump_buffer(ql_dbg_async + ql_dbg_buffer, vha, 0x5055,
                    (uint8_t *)sts, sizeof(*sts));

        sp->done(sp, 0);
}

static void
qla24xx_nvme_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, void *tsk)
{
        const char func[] = "NVME-IOCB";
        fc_port_t *fcport;
        srb_t *sp;
        struct srb_iocb *iocb;
        struct sts_entry_24xx *sts = (struct sts_entry_24xx *)tsk;
        uint16_t        state_flags;
        struct nvmefc_fcp_req *fd;
        uint16_t        ret = 0;
        struct srb_iocb *nvme;

        sp = qla2x00_get_sp_from_handle(vha, func, req, tsk);
        if (!sp)
                return;

        iocb = &sp->u.iocb_cmd;
        fcport = sp->fcport;
        iocb->u.nvme.comp_status = le16_to_cpu(sts->comp_status);
        state_flags  = le16_to_cpu(sts->state_flags);
        fd = iocb->u.nvme.desc;
        nvme = &sp->u.iocb_cmd;

        if (unlikely(nvme->u.nvme.aen_op))
                atomic_dec(&sp->vha->hw->nvme_active_aen_cnt);

        /*
         * State flags: Bit 6 and 0.
         * If 0 is set, we don't care about 6.
         * both cases resp was dma'd to host buffer
         * if both are 0, that is good path case.
         * if six is set and 0 is clear, we need to
         * copy resp data from status iocb to resp buffer.
         */
        if (!(state_flags & (SF_FCP_RSP_DMA | SF_NVME_ERSP))) {
                iocb->u.nvme.rsp_pyld_len = 0;
        } else if ((state_flags & SF_FCP_RSP_DMA)) {
                iocb->u.nvme.rsp_pyld_len = le16_to_cpu(sts->nvme_rsp_pyld_len);
        } else if (state_flags & SF_NVME_ERSP) {
                uint32_t *inbuf, *outbuf;
                uint16_t iter;

                inbuf = (uint32_t *)&sts->nvme_ersp_data;
                outbuf = (uint32_t *)fd->rspaddr;
                iocb->u.nvme.rsp_pyld_len = le16_to_cpu(sts->nvme_rsp_pyld_len);
                iter = iocb->u.nvme.rsp_pyld_len >> 2;
                for (; iter; iter--)
                        *outbuf++ = swab32(*inbuf++);
        } else { /* unhandled case */
            ql_log(ql_log_warn, fcport->vha, 0x503a,
                "NVME-%s error. Unhandled state_flags of %x\n",
                sp->name, state_flags);
        }

        fd->transferred_length = fd->payload_length -
            le32_to_cpu(sts->residual_len);

        /*
         * If transport error then Failure (HBA rejects request)
         * otherwise transport will handle.
         */
        if (sts->entry_status) {
                ql_log(ql_log_warn, fcport->vha, 0x5038,
                    "NVME-%s error - hdl=%x entry-status(%x).\n",
                    sp->name, sp->handle, sts->entry_status);
                ret = QLA_FUNCTION_FAILED;
        } else  {
                switch (le16_to_cpu(sts->comp_status)) {
                        case CS_COMPLETE:
                                ret = 0;
                        break;

                        case CS_ABORTED:
                        case CS_RESET:
                        case CS_PORT_UNAVAILABLE:
                        case CS_PORT_LOGGED_OUT:
                        case CS_PORT_BUSY:
                                ql_log(ql_log_warn, fcport->vha, 0x5060,
                                "NVME-%s ERR Handling - hdl=%x completion status(%x) resid=%x  ox_id=%x\n",
                                sp->name, sp->handle, sts->comp_status,
                                le32_to_cpu(sts->residual_len), sts->ox_id);
                                fd->transferred_length = fd->payload_length;
                                ret = QLA_ABORTED;
                        break;

                        default:
                                ql_log(ql_log_warn, fcport->vha, 0x5060,
                                "NVME-%s error - hdl=%x completion status(%x) resid=%x  ox_id=%x\n",
                                sp->name, sp->handle, sts->comp_status,
                                le32_to_cpu(sts->residual_len), sts->ox_id);
                                ret = QLA_FUNCTION_FAILED;
                                break;
                }
        }
        sp->done(sp, ret);
}

/**
 * qla2x00_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
void
qla2x00_process_response_queue(struct rsp_que *rsp)
{
        struct scsi_qla_host *vha;
        struct qla_hw_data *ha = rsp->hw;
        struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
        sts_entry_t     *pkt;
        uint16_t        handle_cnt;
        uint16_t        cnt;

        vha = pci_get_drvdata(ha->pdev);

        if (!vha->flags.online)
                return;

        while (rsp->ring_ptr->signature != RESPONSE_PROCESSED) {
                pkt = (sts_entry_t *)rsp->ring_ptr;

                rsp->ring_index++;
                if (rsp->ring_index == rsp->length) {
                        rsp->ring_index = 0;
                        rsp->ring_ptr = rsp->ring;
                } else {
                        rsp->ring_ptr++;
                }

                if (pkt->entry_status != 0) {
                        qla2x00_error_entry(vha, rsp, pkt);
                        ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
                        wmb();
                        continue;
                }

                switch (pkt->entry_type) {
                case STATUS_TYPE:
                        qla2x00_status_entry(vha, rsp, pkt);
                        break;
                case STATUS_TYPE_21:
                        handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
                        for (cnt = 0; cnt < handle_cnt; cnt++) {
                                qla2x00_process_completed_request(vha, rsp->req,
                                    ((sts21_entry_t *)pkt)->handle[cnt]);
                        }
                        break;
                case STATUS_TYPE_22:
                        handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
                        for (cnt = 0; cnt < handle_cnt; cnt++) {
                                qla2x00_process_completed_request(vha, rsp->req,
                                    ((sts22_entry_t *)pkt)->handle[cnt]);
                        }
                        break;
                case STATUS_CONT_TYPE:
                        qla2x00_status_cont_entry(rsp, (sts_cont_entry_t *)pkt);
                        break;
                case MBX_IOCB_TYPE:
                        qla2x00_mbx_iocb_entry(vha, rsp->req,
                            (struct mbx_entry *)pkt);
                        break;

                case CT_IOCB_TYPE:
                        qla2x00_ct_entry(vha, rsp->req, pkt, CT_IOCB_TYPE);
                        break;
                default:
                        /* Type Not Supported. */
                        ql_log(ql_log_warn, vha, 0x504a,
                            "Received unknown response pkt type %x "
                            "entry status=%x.\n",
                            pkt->entry_type, pkt->entry_status);
                        break;
                }
                ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
                wmb();
        }

        /* Adjust ring index */
        WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), rsp->ring_index);
}

static inline void
qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t par_sense_len,
                     uint32_t sense_len, struct rsp_que *rsp, int res)
{
        struct scsi_qla_host *vha = sp->vha;
        struct scsi_cmnd *cp = GET_CMD_SP(sp);
        uint32_t track_sense_len;

        if (sense_len >= SCSI_SENSE_BUFFERSIZE)
                sense_len = SCSI_SENSE_BUFFERSIZE;

        SET_CMD_SENSE_LEN(sp, sense_len);
        SET_CMD_SENSE_PTR(sp, cp->sense_buffer);
        track_sense_len = sense_len;

        if (sense_len > par_sense_len)
                sense_len = par_sense_len;

        memcpy(cp->sense_buffer, sense_data, sense_len);

        SET_CMD_SENSE_PTR(sp, cp->sense_buffer + sense_len);
        track_sense_len -= sense_len;
        SET_CMD_SENSE_LEN(sp, track_sense_len);

        if (track_sense_len != 0) {
                rsp->status_srb = sp;
                cp->result = res;
        }

        if (sense_len) {
                ql_dbg(ql_dbg_io + ql_dbg_buffer, vha, 0x301c,
                    "Check condition Sense data, nexus%ld:%d:%llu cmd=%p.\n",
                    sp->vha->host_no, cp->device->id, cp->device->lun,
                    cp);
                ql_dump_buffer(ql_dbg_io + ql_dbg_buffer, vha, 0x302b,
                    cp->sense_buffer, sense_len);
        }
}

struct scsi_dif_tuple {
        __be16 guard;       /* Checksum */
        __be16 app_tag;         /* APPL identifier */
        __be32 ref_tag;         /* Target LBA or indirect LBA */
};

/*
 * Checks the guard or meta-data for the type of error
 * detected by the HBA. In case of errors, we set the
 * ASC/ASCQ fields in the sense buffer with ILLEGAL_REQUEST
 * to indicate to the kernel that the HBA detected error.
 */
static inline int
qla2x00_handle_dif_error(srb_t *sp, struct sts_entry_24xx *sts24)
{
        struct scsi_qla_host *vha = sp->vha;
        struct scsi_cmnd *cmd = GET_CMD_SP(sp);
        uint8_t         *ap = &sts24->data[12];
        uint8_t         *ep = &sts24->data[20];
        uint32_t        e_ref_tag, a_ref_tag;
        uint16_t        e_app_tag, a_app_tag;
        uint16_t        e_guard, a_guard;

        /*
         * swab32 of the "data" field in the beginning of qla2x00_status_entry()
         * would make guard field appear at offset 2
         */
        a_guard   = le16_to_cpu(*(uint16_t *)(ap + 2));
        a_app_tag = le16_to_cpu(*(uint16_t *)(ap + 0));
        a_ref_tag = le32_to_cpu(*(uint32_t *)(ap + 4));
        e_guard   = le16_to_cpu(*(uint16_t *)(ep + 2));
        e_app_tag = le16_to_cpu(*(uint16_t *)(ep + 0));
        e_ref_tag = le32_to_cpu(*(uint32_t *)(ep + 4));

        ql_dbg(ql_dbg_io, vha, 0x3023,
            "iocb(s) %p Returned STATUS.\n", sts24);

        ql_dbg(ql_dbg_io, vha, 0x3024,
            "DIF ERROR in cmd 0x%x lba 0x%llx act ref"
            " tag=0x%x, exp ref_tag=0x%x, act app tag=0x%x, exp app"
            " tag=0x%x, act guard=0x%x, exp guard=0x%x.\n",
            cmd->cmnd[0], (u64)scsi_get_lba(cmd), a_ref_tag, e_ref_tag,
            a_app_tag, e_app_tag, a_guard, e_guard);

        /*
         * Ignore sector if:
         * For type     3: ref & app tag is all 'f's
         * For type 0,1,2: app tag is all 'f's
         */
        if ((a_app_tag == T10_PI_APP_ESCAPE) &&
            ((scsi_get_prot_type(cmd) != SCSI_PROT_DIF_TYPE3) ||
             (a_ref_tag == T10_PI_REF_ESCAPE))) {
                uint32_t blocks_done, resid;
                sector_t lba_s = scsi_get_lba(cmd);

                /* 2TB boundary case covered automatically with this */
                blocks_done = e_ref_tag - (uint32_t)lba_s + 1;

                resid = scsi_bufflen(cmd) - (blocks_done *
                    cmd->device->sector_size);

                scsi_set_resid(cmd, resid);
                cmd->result = DID_OK << 16;

                /* Update protection tag */
                if (scsi_prot_sg_count(cmd)) {
                        uint32_t i, j = 0, k = 0, num_ent;
                        struct scatterlist *sg;
                        struct t10_pi_tuple *spt;

                        /* Patch the corresponding protection tags */
                        scsi_for_each_prot_sg(cmd, sg,
                            scsi_prot_sg_count(cmd), i) {
                                num_ent = sg_dma_len(sg) / 8;
                                if (k + num_ent < blocks_done) {
                                        k += num_ent;
                                        continue;
                                }
                                j = blocks_done - k - 1;
                                k = blocks_done;
                                break;
                        }

                        if (k != blocks_done) {
                                ql_log(ql_log_warn, vha, 0x302f,
                                    "unexpected tag values tag:lba=%x:%llx)\n",
                                    e_ref_tag, (unsigned long long)lba_s);
                                return 1;
                        }

                        spt = page_address(sg_page(sg)) + sg->offset;
                        spt += j;

                        spt->app_tag = T10_PI_APP_ESCAPE;
                        if (scsi_get_prot_type(cmd) == SCSI_PROT_DIF_TYPE3)
                                spt->ref_tag = T10_PI_REF_ESCAPE;
                }

                return 0;
        }

        /* check guard */
        if (e_guard != a_guard) {
                scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
                    0x10, 0x1);
                set_driver_byte(cmd, DRIVER_SENSE);
                set_host_byte(cmd, DID_ABORT);
                cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
                return 1;
        }

        /* check ref tag */
        if (e_ref_tag != a_ref_tag) {
                scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
                    0x10, 0x3);
                set_driver_byte(cmd, DRIVER_SENSE);
                set_host_byte(cmd, DID_ABORT);
                cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
                return 1;
        }

        /* check appl tag */
        if (e_app_tag != a_app_tag) {
                scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
                    0x10, 0x2);
                set_driver_byte(cmd, DRIVER_SENSE);
                set_host_byte(cmd, DID_ABORT);
                cmd->result |= SAM_STAT_CHECK_CONDITION << 1;
                return 1;
        }

        return 1;
}

static void
qla25xx_process_bidir_status_iocb(scsi_qla_host_t *vha, void *pkt,
                                  struct req_que *req, uint32_t index)
{
        struct qla_hw_data *ha = vha->hw;
        srb_t *sp;
        uint16_t        comp_status;
        uint16_t        scsi_status;
        uint16_t thread_id;
        uint32_t rval = EXT_STATUS_OK;
        struct bsg_job *bsg_job = NULL;
        struct fc_bsg_request *bsg_request;
        struct fc_bsg_reply *bsg_reply;
        sts_entry_t *sts;
        struct sts_entry_24xx *sts24;
        sts = (sts_entry_t *) pkt;
        sts24 = (struct sts_entry_24xx *) pkt;

        /* Validate handle. */
        if (index >= req->num_outstanding_cmds) {
                ql_log(ql_log_warn, vha, 0x70af,
                    "Invalid SCSI completion handle 0x%x.\n", index);
                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                return;
        }

        sp = req->outstanding_cmds[index];
        if (!sp) {
                ql_log(ql_log_warn, vha, 0x70b0,
                    "Req:%d: Invalid ISP SCSI completion handle(0x%x)\n",
                    req->id, index);

                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                return;
        }

        /* Free outstanding command slot. */
        req->outstanding_cmds[index] = NULL;
        bsg_job = sp->u.bsg_job;
        bsg_request = bsg_job->request;
        bsg_reply = bsg_job->reply;

        if (IS_FWI2_CAPABLE(ha)) {
                comp_status = le16_to_cpu(sts24->comp_status);
                scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
        } else {
                comp_status = le16_to_cpu(sts->comp_status);
                scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
        }

        thread_id = bsg_request->rqst_data.h_vendor.vendor_cmd[1];
        switch (comp_status) {
        case CS_COMPLETE:
                if (scsi_status == 0) {
                        bsg_reply->reply_payload_rcv_len =
                                        bsg_job->reply_payload.payload_len;
                        vha->qla_stats.input_bytes +=
                                bsg_reply->reply_payload_rcv_len;
                        vha->qla_stats.input_requests++;
                        rval = EXT_STATUS_OK;
                }
                goto done;

        case CS_DATA_OVERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b1,
                    "Command completed with data overrun thread_id=%d\n",
                    thread_id);
                rval = EXT_STATUS_DATA_OVERRUN;
                break;

        case CS_DATA_UNDERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b2,
                    "Command completed with data underrun thread_id=%d\n",
                    thread_id);
                rval = EXT_STATUS_DATA_UNDERRUN;
                break;
        case CS_BIDIR_RD_OVERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b3,
                    "Command completed with read data overrun thread_id=%d\n",
                    thread_id);
                rval = EXT_STATUS_DATA_OVERRUN;
                break;

        case CS_BIDIR_RD_WR_OVERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b4,
                    "Command completed with read and write data overrun "
                    "thread_id=%d\n", thread_id);
                rval = EXT_STATUS_DATA_OVERRUN;
                break;

        case CS_BIDIR_RD_OVERRUN_WR_UNDERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b5,
                    "Command completed with read data over and write data "
                    "underrun thread_id=%d\n", thread_id);
                rval = EXT_STATUS_DATA_OVERRUN;
                break;

        case CS_BIDIR_RD_UNDERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b6,
                    "Command completed with read data underrun "
                    "thread_id=%d\n", thread_id);
                rval = EXT_STATUS_DATA_UNDERRUN;
                break;

        case CS_BIDIR_RD_UNDERRUN_WR_OVERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b7,
                    "Command completed with read data under and write data "
                    "overrun thread_id=%d\n", thread_id);
                rval = EXT_STATUS_DATA_UNDERRUN;
                break;

        case CS_BIDIR_RD_WR_UNDERRUN:
                ql_dbg(ql_dbg_user, vha, 0x70b8,
                    "Command completed with read and write data underrun "
                    "thread_id=%d\n", thread_id);
                rval = EXT_STATUS_DATA_UNDERRUN;
                break;

        case CS_BIDIR_DMA:
                ql_dbg(ql_dbg_user, vha, 0x70b9,
                    "Command completed with data DMA error thread_id=%d\n",
                    thread_id);
                rval = EXT_STATUS_DMA_ERR;
                break;

        case CS_TIMEOUT:
                ql_dbg(ql_dbg_user, vha, 0x70ba,
                    "Command completed with timeout thread_id=%d\n",
                    thread_id);
                rval = EXT_STATUS_TIMEOUT;
                break;
        default:
                ql_dbg(ql_dbg_user, vha, 0x70bb,
                    "Command completed with completion status=0x%x "
                    "thread_id=%d\n", comp_status, thread_id);
                rval = EXT_STATUS_ERR;
                break;
        }
        bsg_reply->reply_payload_rcv_len = 0;

done:
        /* Return the vendor specific reply to API */
        bsg_reply->reply_data.vendor_reply.vendor_rsp[0] = rval;
        bsg_job->reply_len = sizeof(struct fc_bsg_reply);
        /* Always return DID_OK, bsg will send the vendor specific response
         * in this case only */
        sp->done(sp, DID_OK << 6);

}

/**
 * qla2x00_status_entry() - Process a Status IOCB entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
{
        srb_t           *sp;
        fc_port_t       *fcport;
        struct scsi_cmnd *cp;
        sts_entry_t *sts;
        struct sts_entry_24xx *sts24;
        uint16_t        comp_status;
        uint16_t        scsi_status;
        uint16_t        ox_id;
        uint8_t         lscsi_status;
        int32_t         resid;
        uint32_t sense_len, par_sense_len, rsp_info_len, resid_len,
            fw_resid_len;
        uint8_t         *rsp_info, *sense_data;
        struct qla_hw_data *ha = vha->hw;
        uint32_t handle;
        uint16_t que;
        struct req_que *req;
        int logit = 1;
        int res = 0;
        uint16_t state_flags = 0;
        uint16_t retry_delay = 0;
        uint8_t no_logout = 0;

        sts = (sts_entry_t *) pkt;
        sts24 = (struct sts_entry_24xx *) pkt;
        if (IS_FWI2_CAPABLE(ha)) {
                comp_status = le16_to_cpu(sts24->comp_status);
                scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
                state_flags = le16_to_cpu(sts24->state_flags);
        } else {
                comp_status = le16_to_cpu(sts->comp_status);
                scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
        }
        handle = (uint32_t) LSW(sts->handle);
        que = MSW(sts->handle);
        req = ha->req_q_map[que];

        /* Check for invalid queue pointer */
        if (req == NULL ||
            que >= find_first_zero_bit(ha->req_qid_map, ha->max_req_queues)) {
                ql_dbg(ql_dbg_io, vha, 0x3059,
                    "Invalid status handle (0x%x): Bad req pointer. req=%p, "
                    "que=%u.\n", sts->handle, req, que);
                return;
        }

        /* Validate handle. */
        if (handle < req->num_outstanding_cmds) {
                sp = req->outstanding_cmds[handle];
                if (!sp) {
                        ql_dbg(ql_dbg_io, vha, 0x3075,
                            "%s(%ld): Already returned command for status handle (0x%x).\n",
                            __func__, vha->host_no, sts->handle);
                        return;
                }
        } else {
                ql_dbg(ql_dbg_io, vha, 0x3017,
                    "Invalid status handle, out of range (0x%x).\n",
                    sts->handle);

                if (!test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags)) {
                        if (IS_P3P_TYPE(ha))
                                set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
                        else
                                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
                        qla2xxx_wake_dpc(vha);
                }
                return;
        }

        if (sp->cmd_type != TYPE_SRB) {
                req->outstanding_cmds[handle] = NULL;
                ql_dbg(ql_dbg_io, vha, 0x3015,
                    "Unknown sp->cmd_type %x %p).\n",
                    sp->cmd_type, sp);
                return;
        }

        /* NVME completion. */
        if (sp->type == SRB_NVME_CMD) {
                qla24xx_nvme_iocb_entry(vha, req, pkt);
                return;
        }

        if (unlikely((state_flags & BIT_1) && (sp->type == SRB_BIDI_CMD))) {
                qla25xx_process_bidir_status_iocb(vha, pkt, req, handle);
                return;
        }

        /* Task Management completion. */
        if (sp->type == SRB_TM_CMD) {
                qla24xx_tm_iocb_entry(vha, req, pkt);
                return;
        }

        /* Fast path completion. */
        if (comp_status == CS_COMPLETE && scsi_status == 0) {
                qla2x00_process_completed_request(vha, req, handle);

                return;
        }

        req->outstanding_cmds[handle] = NULL;
        cp = GET_CMD_SP(sp);
        if (cp == NULL) {
                ql_dbg(ql_dbg_io, vha, 0x3018,
                    "Command already returned (0x%x/%p).\n",
                    sts->handle, sp);

                return;
        }

        lscsi_status = scsi_status & STATUS_MASK;

        fcport = sp->fcport;

        ox_id = 0;
        sense_len = par_sense_len = rsp_info_len = resid_len =
            fw_resid_len = 0;
        if (IS_FWI2_CAPABLE(ha)) {
                if (scsi_status & SS_SENSE_LEN_VALID)
                        sense_len = le32_to_cpu(sts24->sense_len);
                if (scsi_status & SS_RESPONSE_INFO_LEN_VALID)
                        rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
                if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER))
                        resid_len = le32_to_cpu(sts24->rsp_residual_count);
                if (comp_status == CS_DATA_UNDERRUN)
                        fw_resid_len = le32_to_cpu(sts24->residual_len);
                rsp_info = sts24->data;
                sense_data = sts24->data;
                host_to_fcp_swap(sts24->data, sizeof(sts24->data));
                ox_id = le16_to_cpu(sts24->ox_id);
                par_sense_len = sizeof(sts24->data);
                /* Valid values of the retry delay timer are 0x1-0xffef */
                if (sts24->retry_delay > 0 && sts24->retry_delay < 0xfff1)
                        retry_delay = sts24->retry_delay;
        } else {
                if (scsi_status & SS_SENSE_LEN_VALID)
                        sense_len = le16_to_cpu(sts->req_sense_length);
                if (scsi_status & SS_RESPONSE_INFO_LEN_VALID)
                        rsp_info_len = le16_to_cpu(sts->rsp_info_len);
                resid_len = le32_to_cpu(sts->residual_length);
                rsp_info = sts->rsp_info;
                sense_data = sts->req_sense_data;
                par_sense_len = sizeof(sts->req_sense_data);
        }

        /* Check for any FCP transport errors. */
        if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
                /* Sense data lies beyond any FCP RESPONSE data. */
                if (IS_FWI2_CAPABLE(ha)) {
                        sense_data += rsp_info_len;
                        par_sense_len -= rsp_info_len;
                }
                if (rsp_info_len > 3 && rsp_info[3]) {
                        ql_dbg(ql_dbg_io, fcport->vha, 0x3019,
                            "FCP I/O protocol failure (0x%x/0x%x).\n",
                            rsp_info_len, rsp_info[3]);

                        res = DID_BUS_BUSY << 16;
                        goto out;
                }
        }

        /* Check for overrun. */
        if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
            scsi_status & SS_RESIDUAL_OVER)
                comp_status = CS_DATA_OVERRUN;

        /*
         * Check retry_delay_timer value if we receive a busy or
         * queue full.
         */
        if (lscsi_status == SAM_STAT_TASK_SET_FULL ||
            lscsi_status == SAM_STAT_BUSY)
                qla2x00_set_retry_delay_timestamp(fcport, retry_delay);

        /*
         * Based on Host and scsi status generate status code for Linux
         */
        switch (comp_status) {
        case CS_COMPLETE:
        case CS_QUEUE_FULL:
                if (scsi_status == 0) {
                        res = DID_OK << 16;
                        break;
                }
                if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
                        resid = resid_len;
                        scsi_set_resid(cp, resid);

                        if (!lscsi_status &&
                            ((unsigned)(scsi_bufflen(cp) - resid) <
                             cp->underflow)) {
                                ql_dbg(ql_dbg_io, fcport->vha, 0x301a,
                                    "Mid-layer underflow detected (0x%x of 0x%x bytes).\n",
                                    resid, scsi_bufflen(cp));

                                res = DID_ERROR << 16;
                                break;
                        }
                }
                res = DID_OK << 16 | lscsi_status;

                if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
                        ql_dbg(ql_dbg_io, fcport->vha, 0x301b,
                            "QUEUE FULL detected.\n");
                        break;
                }
                logit = 0;
                if (lscsi_status != SS_CHECK_CONDITION)
                        break;

                memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
                if (!(scsi_status & SS_SENSE_LEN_VALID))
                        break;

                qla2x00_handle_sense(sp, sense_data, par_sense_len, sense_len,
                    rsp, res);
                break;

        case CS_DATA_UNDERRUN:
                /* Use F/W calculated residual length. */
                resid = IS_FWI2_CAPABLE(ha) ? fw_resid_len : resid_len;
                scsi_set_resid(cp, resid);
                if (scsi_status & SS_RESIDUAL_UNDER) {
                        if (IS_FWI2_CAPABLE(ha) && fw_resid_len != resid_len) {
                                ql_dbg(ql_dbg_io, fcport->vha, 0x301d,
                                    "Dropped frame(s) detected (0x%x of 0x%x bytes).\n",
                                    resid, scsi_bufflen(cp));

                                res = DID_ERROR << 16 | lscsi_status;
                                goto check_scsi_status;
                        }

                        if (!lscsi_status &&
                            ((unsigned)(scsi_bufflen(cp) - resid) <
                            cp->underflow)) {
                                ql_dbg(ql_dbg_io, fcport->vha, 0x301e,
                                    "Mid-layer underflow detected (0x%x of 0x%x bytes).\n",
                                    resid, scsi_bufflen(cp));

                                res = DID_ERROR << 16;
                                break;
                        }
                } else if (lscsi_status != SAM_STAT_TASK_SET_FULL &&
                            lscsi_status != SAM_STAT_BUSY) {
                        /*
                         * scsi status of task set and busy are considered to be
                         * task not completed.
                         */

                        ql_dbg(ql_dbg_io, fcport->vha, 0x301f,
                            "Dropped frame(s) detected (0x%x of 0x%x bytes).\n",
                            resid, scsi_bufflen(cp));

                        res = DID_ERROR << 16 | lscsi_status;
                        goto check_scsi_status;
                } else {
                        ql_dbg(ql_dbg_io, fcport->vha, 0x3030,
                            "scsi_status: 0x%x, lscsi_status: 0x%x\n",
                            scsi_status, lscsi_status);
                }

                res = DID_OK << 16 | lscsi_status;
                logit = 0;

check_scsi_status:
                /*
                 * Check to see if SCSI Status is non zero. If so report SCSI
                 * Status.
                 */
                if (lscsi_status != 0) {
                        if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
                                ql_dbg(ql_dbg_io, fcport->vha, 0x3020,
                                    "QUEUE FULL detected.\n");
                                logit = 1;
                                break;
                        }
                        if (lscsi_status != SS_CHECK_CONDITION)
                                break;

                        memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
                        if (!(scsi_status & SS_SENSE_LEN_VALID))
                                break;

                        qla2x00_handle_sense(sp, sense_data, par_sense_len,
                            sense_len, rsp, res);
                }
                break;

        case CS_PORT_LOGGED_OUT:
                no_logout = 1;
        case CS_PORT_CONFIG_CHG:
        case CS_PORT_BUSY:
        case CS_INCOMPLETE:
        case CS_PORT_UNAVAILABLE:
        case CS_TIMEOUT:
        case CS_RESET:

                /*
                 * We are going to have the fc class block the rport
                 * while we try to recover so instruct the mid layer
                 * to requeue until the class decides how to handle this.
                 */
                res = DID_TRANSPORT_DISRUPTED << 16;

                if (comp_status == CS_TIMEOUT) {
                        if (IS_FWI2_CAPABLE(ha))
                                break;
                        else if ((le16_to_cpu(sts->status_flags) &
                            SF_LOGOUT_SENT) == 0)
                                break;
                }

                if (atomic_read(&fcport->state) == FCS_ONLINE) {
                        ql_dbg(ql_dbg_disc, fcport->vha, 0x3021,
                                "Port to be marked lost on fcport=%02x%02x%02x, current "
                                "port state= %s comp_status %x.\n", fcport->d_id.b.domain,
                                fcport->d_id.b.area, fcport->d_id.b.al_pa,
                                port_state_str[atomic_read(&fcport->state)],
                                comp_status);

                        if (no_logout)
                                fcport->logout_on_delete = 0;

                        qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1);
                        qlt_schedule_sess_for_deletion_lock(fcport);
                }

                break;

        case CS_ABORTED:
                res = DID_RESET << 16;
                break;

        case CS_DIF_ERROR:
                logit = qla2x00_handle_dif_error(sp, sts24);
                res = cp->result;
                break;

        case CS_TRANSPORT:
                res = DID_ERROR << 16;

                if (!IS_PI_SPLIT_DET_CAPABLE(ha))
                        break;

                if (state_flags & BIT_4)
                        scmd_printk(KERN_WARNING, cp,
                            "Unsupported device '%s' found.\n",
                            cp->device->vendor);
                break;

        default:
                res = DID_ERROR << 16;
                break;
        }

out:
        if (logit)
                ql_dbg(ql_dbg_io, fcport->vha, 0x3022,
                    "FCP command status: 0x%x-0x%x (0x%x) nexus=%ld:%d:%llu "
                    "portid=%02x%02x%02x oxid=0x%x cdb=%10phN len=0x%x "
                    "rsp_info=0x%x resid=0x%x fw_resid=0x%x sp=%p cp=%p.\n",
                    comp_status, scsi_status, res, vha->host_no,
                    cp->device->id, cp->device->lun, fcport->d_id.b.domain,
                    fcport->d_id.b.area, fcport->d_id.b.al_pa, ox_id,
                    cp->cmnd, scsi_bufflen(cp), rsp_info_len,
                    resid_len, fw_resid_len, sp, cp);

        if (rsp->status_srb == NULL)
                sp->done(sp, res);
}

/**
 * qla2x00_status_cont_entry() - Process a Status Continuations entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 *
 * Extended sense data.
 */
static void
qla2x00_status_cont_entry(struct rsp_que *rsp, sts_cont_entry_t *pkt)
{
        uint8_t sense_sz = 0;
        struct qla_hw_data *ha = rsp->hw;
        struct scsi_qla_host *vha = pci_get_drvdata(ha->pdev);
        srb_t *sp = rsp->status_srb;
        struct scsi_cmnd *cp;
        uint32_t sense_len;
        uint8_t *sense_ptr;

        if (!sp || !GET_CMD_SENSE_LEN(sp))
                return;

        sense_len = GET_CMD_SENSE_LEN(sp);
        sense_ptr = GET_CMD_SENSE_PTR(sp);

        cp = GET_CMD_SP(sp);
        if (cp == NULL) {
                ql_log(ql_log_warn, vha, 0x3025,
                    "cmd is NULL: already returned to OS (sp=%p).\n", sp);

                rsp->status_srb = NULL;
                return;
        }

        if (sense_len > sizeof(pkt->data))
                sense_sz = sizeof(pkt->data);
        else
                sense_sz = sense_len;

        /* Move sense data. */
        if (IS_FWI2_CAPABLE(ha))
                host_to_fcp_swap(pkt->data, sizeof(pkt->data));
        memcpy(sense_ptr, pkt->data, sense_sz);
        ql_dump_buffer(ql_dbg_io + ql_dbg_buffer, vha, 0x302c,
                sense_ptr, sense_sz);

        sense_len -= sense_sz;
        sense_ptr += sense_sz;

        SET_CMD_SENSE_PTR(sp, sense_ptr);
        SET_CMD_SENSE_LEN(sp, sense_len);

        /* Place command on done queue. */
        if (sense_len == 0) {
                rsp->status_srb = NULL;
                sp->done(sp, cp->result);
        }
}

/**
 * qla2x00_error_entry() - Process an error entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 * return : 1=allow further error analysis. 0=no additional error analysis.
 */
static int
qla2x00_error_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, sts_entry_t *pkt)
{
        srb_t *sp;
        struct qla_hw_data *ha = vha->hw;
        const char func[] = "ERROR-IOCB";
        uint16_t que = MSW(pkt->handle);
        struct req_que *req = NULL;
        int res = DID_ERROR << 16;

        ql_dbg(ql_dbg_async, vha, 0x502a,
            "iocb type %xh with error status %xh, handle %xh, rspq id %d\n",
            pkt->entry_type, pkt->entry_status, pkt->handle, rsp->id);

        if (que >= ha->max_req_queues || !ha->req_q_map[que])
                goto fatal;

        req = ha->req_q_map[que];

        if (pkt->entry_status & RF_BUSY)
                res = DID_BUS_BUSY << 16;

        if ((pkt->handle & ~QLA_TGT_HANDLE_MASK) == QLA_TGT_SKIP_HANDLE)
                return 0;

        switch (pkt->entry_type) {
        case NOTIFY_ACK_TYPE:
        case STATUS_TYPE:
        case STATUS_CONT_TYPE:
        case LOGINOUT_PORT_IOCB_TYPE:
        case CT_IOCB_TYPE:
        case ELS_IOCB_TYPE:
        case ABORT_IOCB_TYPE:
        case MBX_IOCB_TYPE:
                sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
                if (sp) {
                        sp->done(sp, res);
                        return 0;
                }
                break;

        case ABTS_RESP_24XX:
        case CTIO_TYPE7:
        case CTIO_CRC2:
        default:
                return 1;
        }
fatal:
        ql_log(ql_log_warn, vha, 0x5030,
            "Error entry - invalid handle/queue (%04x).\n", que);
        return 0;
}

/**
 * qla24xx_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
qla24xx_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
{
        uint16_t        cnt;
        uint32_t        mboxes;
        uint16_t __iomem *wptr;
        struct qla_hw_data *ha = vha->hw;
        struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

        /* Read all mbox registers? */
        mboxes = (1 << ha->mbx_count) - 1;
        if (!ha->mcp)
                ql_dbg(ql_dbg_async, vha, 0x504e, "MBX pointer ERROR.\n");
        else
                mboxes = ha->mcp->in_mb;

        /* Load return mailbox registers. */
        ha->flags.mbox_int = 1;
        ha->mailbox_out[0] = mb0;
        mboxes >>= 1;
        wptr = (uint16_t __iomem *)&reg->mailbox1;

        for (cnt = 1; cnt < ha->mbx_count; cnt++) {
                if (mboxes & BIT_0)
                        ha->mailbox_out[cnt] = RD_REG_WORD(wptr);

                mboxes >>= 1;
                wptr++;
        }
}

static void
qla24xx_abort_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
        struct abort_entry_24xx *pkt)
{
        const char func[] = "ABT_IOCB";
        srb_t *sp;
        struct srb_iocb *abt;

        sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
        if (!sp)
                return;

        abt = &sp->u.iocb_cmd;
        abt->u.abt.comp_status = le16_to_cpu(pkt->nport_handle);
        sp->done(sp, 0);
}

void qla24xx_nvme_ls4_iocb(struct scsi_qla_host *vha,
    struct pt_ls4_request *pkt, struct req_que *req)
{
        srb_t *sp;
        const char func[] = "LS4_IOCB";
        uint16_t comp_status;

        sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
        if (!sp)
                return;

        comp_status = le16_to_cpu(pkt->status);
        sp->done(sp, comp_status);
}

/**
 * qla24xx_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
void qla24xx_process_response_queue(struct scsi_qla_host *vha,
        struct rsp_que *rsp)
{
        struct sts_entry_24xx *pkt;
        struct qla_hw_data *ha = vha->hw;

        if (!ha->flags.fw_started)
                return;

        if (rsp->qpair->cpuid != smp_processor_id())
                qla_cpu_update(rsp->qpair, smp_processor_id());

        while (rsp->ring_ptr->signature != RESPONSE_PROCESSED) {
                pkt = (struct sts_entry_24xx *)rsp->ring_ptr;

                rsp->ring_index++;
                if (rsp->ring_index == rsp->length) {
                        rsp->ring_index = 0;
                        rsp->ring_ptr = rsp->ring;
                } else {
                        rsp->ring_ptr++;
                }

                if (pkt->entry_status != 0) {
                        if (qla2x00_error_entry(vha, rsp, (sts_entry_t *) pkt))
                                goto process_err;

                        ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
                        wmb();
                        continue;
                }
process_err:

                switch (pkt->entry_type) {
                case STATUS_TYPE:
                        qla2x00_status_entry(vha, rsp, pkt);
                        break;
                case STATUS_CONT_TYPE:
                        qla2x00_status_cont_entry(rsp, (sts_cont_entry_t *)pkt);
                        break;
                case VP_RPT_ID_IOCB_TYPE:
                        qla24xx_report_id_acquisition(vha,
                            (struct vp_rpt_id_entry_24xx *)pkt);
                        break;
                case LOGINOUT_PORT_IOCB_TYPE:
                        qla24xx_logio_entry(vha, rsp->req,
                            (struct logio_entry_24xx *)pkt);
                        break;
                case CT_IOCB_TYPE:
                        qla24xx_els_ct_entry(vha, rsp->req, pkt, CT_IOCB_TYPE);
                        break;
                case ELS_IOCB_TYPE:
                        qla24xx_els_ct_entry(vha, rsp->req, pkt, ELS_IOCB_TYPE);
                        break;
                case ABTS_RECV_24XX:
                        if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
                                /* ensure that the ATIO queue is empty */
                                qlt_handle_abts_recv(vha, rsp,
                                    (response_t *)pkt);
                                break;
                        } else {
                                /* drop through */
                                qlt_24xx_process_atio_queue(vha, 1);
                        }
                case ABTS_RESP_24XX:
                case CTIO_TYPE7:
                case CTIO_CRC2:
                        qlt_response_pkt_all_vps(vha, rsp, (response_t *)pkt);
                        break;
                case PT_LS4_REQUEST:
                        qla24xx_nvme_ls4_iocb(vha, (struct pt_ls4_request *)pkt,
                            rsp->req);
                        break;
                case NOTIFY_ACK_TYPE:
                        if (pkt->handle == QLA_TGT_SKIP_HANDLE)
                                qlt_response_pkt_all_vps(vha, rsp,
                                    (response_t *)pkt);
                        else
                                qla24xxx_nack_iocb_entry(vha, rsp->req,
                                        (struct nack_to_isp *)pkt);
                        break;
                case MARKER_TYPE:
                        /* Do nothing in this case, this check is to prevent it
                         * from falling into default case
                         */
                        break;
                case ABORT_IOCB_TYPE: