/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2013 QLogic Corporation
 *
 * See LICENSE.qla2xxx for copyright and licensing details.
 */
#include "qla_def.h"

#include <linux/moduleparam.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/mutex.h>
#include <linux/kobject.h>
#include <linux/slab.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>

#include "qla_target.h"

/*
 * Driver version
 */
char qla2x00_version_str[40];

static int apidev_major;

/*
 * SRB allocation cache
 */
static struct kmem_cache *srb_cachep;

/*
 * CT6 CTX allocation cache
 */
static struct kmem_cache *ctx_cachep;
/*
 * error level for logging
 */
int ql_errlev = ql_log_all;

static int ql2xenableclass2;
module_param(ql2xenableclass2, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xenableclass2,
                "Specify if Class 2 operations are supported from the very "
                "beginning. Default is 0 - class 2 not supported.");


int ql2xlogintimeout = 20;
module_param(ql2xlogintimeout, int, S_IRUGO);
MODULE_PARM_DESC(ql2xlogintimeout,
                "Login timeout value in seconds.");

int qlport_down_retry;
module_param(qlport_down_retry, int, S_IRUGO);
MODULE_PARM_DESC(qlport_down_retry,
                "Maximum number of command retries to a port that returns "
                "a PORT-DOWN status.");

int ql2xplogiabsentdevice;
module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xplogiabsentdevice,
                "Option to enable PLOGI to devices that are not present after "
                "a Fabric scan.  This is needed for several broken switches. "
                "Default is 0 - no PLOGI. 1 - perfom PLOGI.");

int ql2xloginretrycount = 0;
module_param(ql2xloginretrycount, int, S_IRUGO);
MODULE_PARM_DESC(ql2xloginretrycount,
                "Specify an alternate value for the NVRAM login retry count.");

int ql2xallocfwdump = 1;
module_param(ql2xallocfwdump, int, S_IRUGO);
MODULE_PARM_DESC(ql2xallocfwdump,
                "Option to enable allocation of memory for a firmware dump "
                "during HBA initialization.  Memory allocation requirements "
                "vary by ISP type.  Default is 1 - allocate memory.");

int ql2xextended_error_logging;
module_param(ql2xextended_error_logging, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xextended_error_logging,
                "Option to enable extended error logging,\n"
                "\t\tDefault is 0 - no logging.  0x40000000 - Module Init & Probe.\n"
                "\t\t0x20000000 - Mailbox Cmnds. 0x10000000 - Device Discovery.\n"
                "\t\t0x08000000 - IO tracing.    0x04000000 - DPC Thread.\n"
                "\t\t0x02000000 - Async events.  0x01000000 - Timer routines.\n"
                "\t\t0x00800000 - User space.    0x00400000 - Task Management.\n"
                "\t\t0x00200000 - AER/EEH.       0x00100000 - Multi Q.\n"
                "\t\t0x00080000 - P3P Specific.  0x00040000 - Virtual Port.\n"
                "\t\t0x00020000 - Buffer Dump.   0x00010000 - Misc.\n"
                "\t\t0x00008000 - Verbose.       0x00004000 - Target.\n"
                "\t\t0x00002000 - Target Mgmt.   0x00001000 - Target TMF.\n"
                "\t\t0x7fffffff - For enabling all logs, can be too many logs.\n"
                "\t\t0x1e400000 - Preferred value for capturing essential "
                "debug information (equivalent to old "
                "ql2xextended_error_logging=1).\n"
                "\t\tDo LOGICAL OR of the value to enable more than one level");

int ql2xshiftctondsd = 6;
module_param(ql2xshiftctondsd, int, S_IRUGO);
MODULE_PARM_DESC(ql2xshiftctondsd,
                "Set to control shifting of command type processing "
                "based on total number of SG elements.");

int ql2xfdmienable=1;
module_param(ql2xfdmienable, int, S_IRUGO);
MODULE_PARM_DESC(ql2xfdmienable,
                "Enables FDMI registrations. "
                "0 - no FDMI. Default is 1 - perform FDMI.");

int ql2xmaxqdepth = MAX_Q_DEPTH;
module_param(ql2xmaxqdepth, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xmaxqdepth,
                "Maximum queue depth to set for each LUN. "
                "Default is 32.");

int ql2xenabledif = 2;
module_param(ql2xenabledif, int, S_IRUGO);
MODULE_PARM_DESC(ql2xenabledif,
                " Enable T10-CRC-DIF "
                " Default is 0 - No DIF Support. 1 - Enable it"
                ", 2 - Enable DIF for all types, except Type 0.");

int ql2xenablehba_err_chk = 2;
module_param(ql2xenablehba_err_chk, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xenablehba_err_chk,
                " Enable T10-CRC-DIF Error isolation by HBA:\n"
                " Default is 1.\n"
                "  0 -- Error isolation disabled\n"
                "  1 -- Error isolation enabled only for DIX Type 0\n"
                "  2 -- Error isolation enabled for all Types\n");

int ql2xiidmaenable=1;
module_param(ql2xiidmaenable, int, S_IRUGO);
MODULE_PARM_DESC(ql2xiidmaenable,
                "Enables iIDMA settings "
                "Default is 1 - perform iIDMA. 0 - no iIDMA.");

int ql2xmaxqueues = 1;
module_param(ql2xmaxqueues, int, S_IRUGO);
MODULE_PARM_DESC(ql2xmaxqueues,
                "Enables MQ settings "
                "Default is 1 for single queue. Set it to number "
                "of queues in MQ mode.");

int ql2xmultique_tag;
module_param(ql2xmultique_tag, int, S_IRUGO);
MODULE_PARM_DESC(ql2xmultique_tag,
                "Enables CPU affinity settings for the driver "
                "Default is 0 for no affinity of request and response IO. "
                "Set it to 1 to turn on the cpu affinity.");

int ql2xfwloadbin;
module_param(ql2xfwloadbin, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xfwloadbin,
                "Option to specify location from which to load ISP firmware:.\n"
                " 2 -- load firmware via the request_firmware() (hotplug).\n"
                "      interface.\n"
                " 1 -- load firmware from flash.\n"
                " 0 -- use default semantics.\n");

int ql2xetsenable;
module_param(ql2xetsenable, int, S_IRUGO);
MODULE_PARM_DESC(ql2xetsenable,
                "Enables firmware ETS burst."
                "Default is 0 - skip ETS enablement.");

int ql2xdbwr = 1;
module_param(ql2xdbwr, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xdbwr,
                "Option to specify scheme for request queue posting.\n"
                " 0 -- Regular doorbell.\n"
                " 1 -- CAMRAM doorbell (faster).\n");

int ql2xtargetreset = 1;
module_param(ql2xtargetreset, int, S_IRUGO);
MODULE_PARM_DESC(ql2xtargetreset,
                 "Enable target reset."
                 "Default is 1 - use hw defaults.");

int ql2xgffidenable;
module_param(ql2xgffidenable, int, S_IRUGO);
MODULE_PARM_DESC(ql2xgffidenable,
                "Enables GFF_ID checks of port type. "
                "Default is 0 - Do not use GFF_ID information.");

int ql2xasynctmfenable;
module_param(ql2xasynctmfenable, int, S_IRUGO);
MODULE_PARM_DESC(ql2xasynctmfenable,
                "Enables issue of TM IOCBs asynchronously via IOCB mechanism"
                "Default is 0 - Issue TM IOCBs via mailbox mechanism.");

int ql2xdontresethba;
module_param(ql2xdontresethba, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xdontresethba,
                "Option to specify reset behaviour.\n"
                " 0 (Default) -- Reset on failure.\n"
                " 1 -- Do not reset on failure.\n");

uint ql2xmaxlun = MAX_LUNS;
module_param(ql2xmaxlun, uint, S_IRUGO);
MODULE_PARM_DESC(ql2xmaxlun,
                "Defines the maximum LU number to register with the SCSI "
                "midlayer. Default is 65535.");

int ql2xmdcapmask = 0x1F;
module_param(ql2xmdcapmask, int, S_IRUGO);
MODULE_PARM_DESC(ql2xmdcapmask,
                "Set the Minidump driver capture mask level. "
                "Default is 0x1F - Can be set to 0x3, 0x7, 0xF, 0x1F, 0x7F.");

int ql2xmdenable = 1;
module_param(ql2xmdenable, int, S_IRUGO);
MODULE_PARM_DESC(ql2xmdenable,
                "Enable/disable MiniDump. "
                "0 - MiniDump disabled. "
                "1 (Default) - MiniDump enabled.");

/*
 * SCSI host template entry points
 */
static int qla2xxx_slave_configure(struct scsi_device * device);
static int qla2xxx_slave_alloc(struct scsi_device *);
static int qla2xxx_scan_finished(struct Scsi_Host *, unsigned long time);
static void qla2xxx_scan_start(struct Scsi_Host *);
static void qla2xxx_slave_destroy(struct scsi_device *);
static int qla2xxx_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmd);
static int qla2xxx_eh_abort(struct scsi_cmnd *);
static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
static int qla2xxx_eh_target_reset(struct scsi_cmnd *);
static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
static int qla2xxx_eh_host_reset(struct scsi_cmnd *);

static int qla2x00_change_queue_depth(struct scsi_device *, int, int);
static int qla2x00_change_queue_type(struct scsi_device *, int);
static void qla2x00_free_device(scsi_qla_host_t *);

struct scsi_host_template qla2xxx_driver_template = {
        .module                 = THIS_MODULE,
        .name                   = QLA2XXX_DRIVER_NAME,
        .queuecommand           = qla2xxx_queuecommand,

        .eh_abort_handler       = qla2xxx_eh_abort,
        .eh_device_reset_handler = qla2xxx_eh_device_reset,
        .eh_target_reset_handler = qla2xxx_eh_target_reset,
        .eh_bus_reset_handler   = qla2xxx_eh_bus_reset,
        .eh_host_reset_handler  = qla2xxx_eh_host_reset,

        .slave_configure        = qla2xxx_slave_configure,

        .slave_alloc            = qla2xxx_slave_alloc,
        .slave_destroy          = qla2xxx_slave_destroy,
        .scan_finished          = qla2xxx_scan_finished,
        .scan_start             = qla2xxx_scan_start,
        .change_queue_depth     = qla2x00_change_queue_depth,
        .change_queue_type      = qla2x00_change_queue_type,
        .this_id                = -1,
        .cmd_per_lun            = 3,
        .use_clustering         = ENABLE_CLUSTERING,
        .sg_tablesize           = SG_ALL,

        .max_sectors            = 0xFFFF,
        .shost_attrs            = qla2x00_host_attrs,

        .supported_mode         = MODE_INITIATOR,
};

static struct scsi_transport_template *qla2xxx_transport_template = NULL;
struct scsi_transport_template *qla2xxx_transport_vport_template = NULL;

/* TODO Convert to inlines
 *
 * Timer routines
 */

__inline__ void
qla2x00_start_timer(scsi_qla_host_t *vha, void *func, unsigned long interval)
{
        init_timer(&vha->timer);
        vha->timer.expires = jiffies + interval * HZ;
        vha->timer.data = (unsigned long)vha;
        vha->timer.function = (void (*)(unsigned long))func;
        add_timer(&vha->timer);
        vha->timer_active = 1;
}

static inline void
qla2x00_restart_timer(scsi_qla_host_t *vha, unsigned long interval)
{
        /* Currently used for 82XX only. */
        if (vha->device_flags & DFLG_DEV_FAILED) {
                ql_dbg(ql_dbg_timer, vha, 0x600d,
                    "Device in a failed state, returning.\n");
                return;
        }

        mod_timer(&vha->timer, jiffies + interval * HZ);
}

static __inline__ void
qla2x00_stop_timer(scsi_qla_host_t *vha)
{
        del_timer_sync(&vha->timer);
        vha->timer_active = 0;
}

static int qla2x00_do_dpc(void *data);

static void qla2x00_rst_aen(scsi_qla_host_t *);

static int qla2x00_mem_alloc(struct qla_hw_data *, uint16_t, uint16_t,
        struct req_que **, struct rsp_que **);
static void qla2x00_free_fw_dump(struct qla_hw_data *);
static void qla2x00_mem_free(struct qla_hw_data *);

/* -------------------------------------------------------------------------- */
static int qla2x00_alloc_queues(struct qla_hw_data *ha, struct req_que *req,
                                struct rsp_que *rsp)
{
        scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
        ha->req_q_map = kzalloc(sizeof(struct req_que *) * ha->max_req_queues,
                                GFP_KERNEL);
        if (!ha->req_q_map) {
                ql_log(ql_log_fatal, vha, 0x003b,
                    "Unable to allocate memory for request queue ptrs.\n");
                goto fail_req_map;
        }

        ha->rsp_q_map = kzalloc(sizeof(struct rsp_que *) * ha->max_rsp_queues,
                                GFP_KERNEL);
        if (!ha->rsp_q_map) {
                ql_log(ql_log_fatal, vha, 0x003c,
                    "Unable to allocate memory for response queue ptrs.\n");
                goto fail_rsp_map;
        }
        /*
         * Make sure we record at least the request and response queue zero in
         * case we need to free them if part of the probe fails.
         */
        ha->rsp_q_map[0] = rsp;
        ha->req_q_map[0] = req;
        set_bit(0, ha->rsp_qid_map);
        set_bit(0, ha->req_qid_map);
        return 1;

fail_rsp_map:
        kfree(ha->req_q_map);
        ha->req_q_map = NULL;
fail_req_map:
        return -ENOMEM;
}

static void qla2x00_free_req_que(struct qla_hw_data *ha, struct req_que *req)
{
        if (IS_QLAFX00(ha)) {
                if (req && req->ring_fx00)
                        dma_free_coherent(&ha->pdev->dev,
                            (req->length_fx00 + 1) * sizeof(request_t),
                            req->ring_fx00, req->dma_fx00);
        } else if (req && req->ring)
                dma_free_coherent(&ha->pdev->dev,
                (req->length + 1) * sizeof(request_t),
                req->ring, req->dma);

        if (req)
                kfree(req->outstanding_cmds);

        kfree(req);
        req = NULL;
}

static void qla2x00_free_rsp_que(struct qla_hw_data *ha, struct rsp_que *rsp)
{
        if (IS_QLAFX00(ha)) {
                if (rsp && rsp->ring)
                        dma_free_coherent(&ha->pdev->dev,
                            (rsp->length_fx00 + 1) * sizeof(request_t),
                            rsp->ring_fx00, rsp->dma_fx00);
        } else if (rsp && rsp->ring) {
                dma_free_coherent(&ha->pdev->dev,
                (rsp->length + 1) * sizeof(response_t),
                rsp->ring, rsp->dma);
        }
        kfree(rsp);
        rsp = NULL;
}

static void qla2x00_free_queues(struct qla_hw_data *ha)
{
        struct req_que *req;
        struct rsp_que *rsp;
        int cnt;

        for (cnt = 0; cnt < ha->max_req_queues; cnt++) {
                req = ha->req_q_map[cnt];
                qla2x00_free_req_que(ha, req);
        }
        kfree(ha->req_q_map);
        ha->req_q_map = NULL;

        for (cnt = 0; cnt < ha->max_rsp_queues; cnt++) {
                rsp = ha->rsp_q_map[cnt];
                qla2x00_free_rsp_que(ha, rsp);
        }
        kfree(ha->rsp_q_map);
        ha->rsp_q_map = NULL;
}

static int qla25xx_setup_mode(struct scsi_qla_host *vha)
{
        uint16_t options = 0;
        int ques, req, ret;
        struct qla_hw_data *ha = vha->hw;

        if (!(ha->fw_attributes & BIT_6)) {
                ql_log(ql_log_warn, vha, 0x00d8,
                    "Firmware is not multi-queue capable.\n");
                goto fail;
        }
        if (ql2xmultique_tag) {
                /* create a request queue for IO */
                options |= BIT_7;
                req = qla25xx_create_req_que(ha, options, 0, 0, -1,
                        QLA_DEFAULT_QUE_QOS);
                if (!req) {
                        ql_log(ql_log_warn, vha, 0x00e0,
                            "Failed to create request queue.\n");
                        goto fail;
                }
                ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 1);
                vha->req = ha->req_q_map[req];
                options |= BIT_1;
                for (ques = 1; ques < ha->max_rsp_queues; ques++) {
                        ret = qla25xx_create_rsp_que(ha, options, 0, 0, req);
                        if (!ret) {
                                ql_log(ql_log_warn, vha, 0x00e8,
                                    "Failed to create response queue.\n");
                                goto fail2;
                        }
                }
                ha->flags.cpu_affinity_enabled = 1;
                ql_dbg(ql_dbg_multiq, vha, 0xc007,
                    "CPU affinity mode enalbed, "
                    "no. of response queues:%d no. of request queues:%d.\n",
                    ha->max_rsp_queues, ha->max_req_queues);
                ql_dbg(ql_dbg_init, vha, 0x00e9,
                    "CPU affinity mode enalbed, "
                    "no. of response queues:%d no. of request queues:%d.\n",
                    ha->max_rsp_queues, ha->max_req_queues);
        }
        return 0;
fail2:
        qla25xx_delete_queues(vha);
        destroy_workqueue(ha->wq);
        ha->wq = NULL;
        vha->req = ha->req_q_map[0];
fail:
        ha->mqenable = 0;
        kfree(ha->req_q_map);
        kfree(ha->rsp_q_map);
        ha->max_req_queues = ha->max_rsp_queues = 1;
        return 1;
}

static char *
qla2x00_pci_info_str(struct scsi_qla_host *vha, char *str)
{
        struct qla_hw_data *ha = vha->hw;
        static char *pci_bus_modes[] = {
                "33", "66", "100", "133",
        };
        uint16_t pci_bus;

        strcpy(str, "PCI");
        pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
        if (pci_bus) {
                strcat(str, "-X (");
                strcat(str, pci_bus_modes[pci_bus]);
        } else {
                pci_bus = (ha->pci_attr & BIT_8) >> 8;
                strcat(str, " (");
                strcat(str, pci_bus_modes[pci_bus]);
        }
        strcat(str, " MHz)");

        return (str);
}

static char *
qla24xx_pci_info_str(struct scsi_qla_host *vha, char *str)
{
        static char *pci_bus_modes[] = { "33", "66", "100", "133", };
        struct qla_hw_data *ha = vha->hw;
        uint32_t pci_bus;
        int pcie_reg;

        pcie_reg = pci_pcie_cap(ha->pdev);
        if (pcie_reg) {
                char lwstr[6];
                uint16_t pcie_lstat, lspeed, lwidth;

                pcie_reg += PCI_EXP_LNKCAP;
                pci_read_config_word(ha->pdev, pcie_reg, &pcie_lstat);
                lspeed = pcie_lstat & (BIT_0 | BIT_1 | BIT_2 | BIT_3);
                lwidth = (pcie_lstat &
                    (BIT_4 | BIT_5 | BIT_6 | BIT_7 | BIT_8 | BIT_9)) >> 4;

                strcpy(str, "PCIe (");
                switch (lspeed) {
                case 1:
                        strcat(str, "2.5GT/s ");
                        break;
                case 2:
                        strcat(str, "5.0GT/s ");
                        break;
                case 3:
                        strcat(str, "8.0GT/s ");
                        break;
                default:
                        strcat(str, "<unknown> ");
                        break;
                }
                snprintf(lwstr, sizeof(lwstr), "x%d)", lwidth);
                strcat(str, lwstr);

                return str;
        }

        strcpy(str, "PCI");
        pci_bus = (ha->pci_attr & CSRX_PCIX_BUS_MODE_MASK) >> 8;
        if (pci_bus == 0 || pci_bus == 8) {
                strcat(str, " (");
                strcat(str, pci_bus_modes[pci_bus >> 3]);
        } else {
                strcat(str, "-X ");
                if (pci_bus & BIT_2)
                        strcat(str, "Mode 2");
                else
                        strcat(str, "Mode 1");
                strcat(str, " (");
                strcat(str, pci_bus_modes[pci_bus & ~BIT_2]);
        }
        strcat(str, " MHz)");

        return str;
}

static char *
qla2x00_fw_version_str(struct scsi_qla_host *vha, char *str)
{
        char un_str[10];
        struct qla_hw_data *ha = vha->hw;

        sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
            ha->fw_minor_version,
            ha->fw_subminor_version);

        if (ha->fw_attributes & BIT_9) {
                strcat(str, "FLX");
                return (str);
        }

        switch (ha->fw_attributes & 0xFF) {
        case 0x7:
                strcat(str, "EF");
                break;
        case 0x17:
                strcat(str, "TP");
                break;
        case 0x37:
                strcat(str, "IP");
                break;
        case 0x77:
                strcat(str, "VI");
                break;
        default:
                sprintf(un_str, "(%x)", ha->fw_attributes);
                strcat(str, un_str);
                break;
        }
        if (ha->fw_attributes & 0x100)
                strcat(str, "X");

        return (str);
}

static char *
qla24xx_fw_version_str(struct scsi_qla_host *vha, char *str)
{
        struct qla_hw_data *ha = vha->hw;

        sprintf(str, "%d.%02d.%02d (%x)", ha->fw_major_version,
            ha->fw_minor_version, ha->fw_subminor_version, ha->fw_attributes);
        return str;
}

void
qla2x00_sp_free_dma(void *vha, void *ptr)
{
        srb_t *sp = (srb_t *)ptr;
        struct scsi_cmnd *cmd = GET_CMD_SP(sp);
        struct qla_hw_data *ha = sp->fcport->vha->hw;
        void *ctx = GET_CMD_CTX_SP(sp);

        if (sp->flags & SRB_DMA_VALID) {
                scsi_dma_unmap(cmd);
                sp->flags &= ~SRB_DMA_VALID;
        }

        if (sp->flags & SRB_CRC_PROT_DMA_VALID) {
                dma_unmap_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
                    scsi_prot_sg_count(cmd), cmd->sc_data_direction);
                sp->flags &= ~SRB_CRC_PROT_DMA_VALID;
        }

        if (sp->flags & SRB_CRC_CTX_DSD_VALID) {
                /* List assured to be having elements */
                qla2x00_clean_dsd_pool(ha, sp);
                sp->flags &= ~SRB_CRC_CTX_DSD_VALID;
        }

        if (sp->flags & SRB_CRC_CTX_DMA_VALID) {
                dma_pool_free(ha->dl_dma_pool, ctx,
                    ((struct crc_context *)ctx)->crc_ctx_dma);
                sp->flags &= ~SRB_CRC_CTX_DMA_VALID;
        }

        if (sp->flags & SRB_FCP_CMND_DMA_VALID) {
                struct ct6_dsd *ctx1 = (struct ct6_dsd *)ctx;

                dma_pool_free(ha->fcp_cmnd_dma_pool, ctx1->fcp_cmnd,
                        ctx1->fcp_cmnd_dma);
                list_splice(&ctx1->dsd_list, &ha->gbl_dsd_list);
                ha->gbl_dsd_inuse -= ctx1->dsd_use_cnt;
                ha->gbl_dsd_avail += ctx1->dsd_use_cnt;
                mempool_free(ctx1, ha->ctx_mempool);
                ctx1 = NULL;
        }

        CMD_SP(cmd) = NULL;
        qla2x00_rel_sp(sp->fcport->vha, sp);
}

static void
qla2x00_sp_compl(void *data, void *ptr, int res)
{
        struct qla_hw_data *ha = (struct qla_hw_data *)data;
        srb_t *sp = (srb_t *)ptr;
        struct scsi_cmnd *cmd = GET_CMD_SP(sp);

        cmd->result = res;

        if (atomic_read(&sp->ref_count) == 0) {
                ql_dbg(ql_dbg_io, sp->fcport->vha, 0x3015,
                    "SP reference-count to ZERO -- sp=%p cmd=%p.\n",
                    sp, GET_CMD_SP(sp));
                if (ql2xextended_error_logging & ql_dbg_io)
                        BUG();
                return;
        }
        if (!atomic_dec_and_test(&sp->ref_count))
                return;

        qla2x00_sp_free_dma(ha, sp);
        cmd->scsi_done(cmd);
}

/* If we are SP1 here, we need to still take and release the host_lock as SP1
 * does not have the changes necessary to avoid taking host->host_lock.
 */
static int
qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
{
        scsi_qla_host_t *vha = shost_priv(host);
        fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
        struct fc_rport *rport = starget_to_rport(scsi_target(cmd->device));
        struct qla_hw_data *ha = vha->hw;
        struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
        srb_t *sp;
        int rval;

        if (ha->flags.eeh_busy) {
                if (ha->flags.pci_channel_io_perm_failure) {
                        ql_dbg(ql_dbg_aer, vha, 0x9010,
                            "PCI Channel IO permanent failure, exiting "
                            "cmd=%p.\n", cmd);
                        cmd->result = DID_NO_CONNECT << 16;
                } else {
                        ql_dbg(ql_dbg_aer, vha, 0x9011,
                            "EEH_Busy, Requeuing the cmd=%p.\n", cmd);
                        cmd->result = DID_REQUEUE << 16;
                }
                goto qc24_fail_command;
        }

        rval = fc_remote_port_chkready(rport);
        if (rval) {
                cmd->result = rval;
                ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x3003,
                    "fc_remote_port_chkready failed for cmd=%p, rval=0x%x.\n",
                    cmd, rval);
                goto qc24_fail_command;
        }

        if (!vha->flags.difdix_supported &&
                scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
                        ql_dbg(ql_dbg_io, vha, 0x3004,
                            "DIF Cap not reg, fail DIF capable cmd's:%p.\n",
                            cmd);
                        cmd->result = DID_NO_CONNECT << 16;
                        goto qc24_fail_command;
        }

        if (!fcport) {
                cmd->result = DID_NO_CONNECT << 16;
                goto qc24_fail_command;
        }

        if (atomic_read(&fcport->state) != FCS_ONLINE) {
                if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
                        atomic_read(&base_vha->loop_state) == LOOP_DEAD) {
                        ql_dbg(ql_dbg_io, vha, 0x3005,
                            "Returning DNC, fcport_state=%d loop_state=%d.\n",
                            atomic_read(&fcport->state),
                            atomic_read(&base_vha->loop_state));
                        cmd->result = DID_NO_CONNECT << 16;
                        goto qc24_fail_command;
                }
                goto qc24_target_busy;
        }

        sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
        if (!sp) {
                set_bit(HOST_RAMP_DOWN_QUEUE_DEPTH, &vha->dpc_flags);
                goto qc24_host_busy;
        }

        sp->u.scmd.cmd = cmd;
        sp->type = SRB_SCSI_CMD;
        atomic_set(&sp->ref_count, 1);
        CMD_SP(cmd) = (void *)sp;
        sp->free = qla2x00_sp_free_dma;
        sp->done = qla2x00_sp_compl;

        rval = ha->isp_ops->start_scsi(sp);
        if (rval != QLA_SUCCESS) {
                ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x3013,
                    "Start scsi failed rval=%d for cmd=%p.\n", rval, cmd);
                set_bit(HOST_RAMP_DOWN_QUEUE_DEPTH, &vha->dpc_flags);
                goto qc24_host_busy_free_sp;
        }

        return 0;

qc24_host_busy_free_sp:
        qla2x00_sp_free_dma(ha, sp);

qc24_host_busy:
        return SCSI_MLQUEUE_HOST_BUSY;

qc24_target_busy:
        return SCSI_MLQUEUE_TARGET_BUSY;

qc24_fail_command:
        cmd->scsi_done(cmd);

        return 0;
}

/*
 * qla2x00_eh_wait_on_command
 *    Waits for the command to be returned by the Firmware for some
 *    max time.
 *
 * Input:
 *    cmd = Scsi Command to wait on.
 *
 * Return:
 *    Not Found : 0
 *    Found : 1
 */
static int
qla2x00_eh_wait_on_command(struct scsi_cmnd *cmd)
{
#define ABORT_POLLING_PERIOD    1000
#define ABORT_WAIT_ITER         ((10 * 1000) / (ABORT_POLLING_PERIOD))
        unsigned long wait_iter = ABORT_WAIT_ITER;
        scsi_qla_host_t *vha = shost_priv(cmd->device->host);
        struct qla_hw_data *ha = vha->hw;
        int ret = QLA_SUCCESS;

        if (unlikely(pci_channel_offline(ha->pdev)) || ha->flags.eeh_busy) {
                ql_dbg(ql_dbg_taskm, vha, 0x8005,
                    "Return:eh_wait.\n");
                return ret;
        }

        while (CMD_SP(cmd) && wait_iter--) {
                msleep(ABORT_POLLING_PERIOD);
        }
        if (CMD_SP(cmd))
                ret = QLA_FUNCTION_FAILED;

        return ret;
}

/*
 * qla2x00_wait_for_hba_online
 *    Wait till the HBA is online after going through
 *    <= MAX_RETRIES_OF_ISP_ABORT  or
 *    finally HBA is disabled ie marked offline
 *
 * Input:
 *     ha - pointer to host adapter structure
 *
 * Note:
 *    Does context switching-Release SPIN_LOCK
 *    (if any) before calling this routine.
 *
 * Return:
 *    Success (Adapter is online) : 0
 *    Failed  (Adapter is offline/disabled) : 1
 */
int
qla2x00_wait_for_hba_online(scsi_qla_host_t *vha)
{
        int             return_status;
        unsigned long   wait_online;
        struct qla_hw_data *ha = vha->hw;
        scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);

        wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
        while (((test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags)) ||
            test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
            test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
            ha->dpc_active) && time_before(jiffies, wait_online)) {

                msleep(1000);
        }
        if (base_vha->flags.online)
                return_status = QLA_SUCCESS;
        else
                return_status = QLA_FUNCTION_FAILED;

        return (return_status);
}

/*
 * qla2x00_wait_for_reset_ready
 *    Wait till the HBA is online after going through
 *    <= MAX_RETRIES_OF_ISP_ABORT  or
 *    finally HBA is disabled ie marked offline or flash
 *    operations are in progress.
 *
 * Input:
 *     ha - pointer to host adapter structure
 *
 * Note:
 *    Does context switching-Release SPIN_LOCK
 *    (if any) before calling this routine.
 *
 * Return:
 *    Success (Adapter is online/no flash ops) : 0
 *    Failed  (Adapter is offline/disabled/flash ops in progress) : 1
 */
static int
qla2x00_wait_for_reset_ready(scsi_qla_host_t *vha)
{
        int             return_status;
        unsigned long   wait_online;
        struct qla_hw_data *ha = vha->hw;
        scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);

        wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
        while (((test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags)) ||
            test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
            test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
            ha->optrom_state != QLA_SWAITING ||
            ha->dpc_active) && time_before(jiffies, wait_online))
                msleep(1000);

        if (base_vha->flags.online &&  ha->optrom_state == QLA_SWAITING)
                return_status = QLA_SUCCESS;
        else
                return_status = QLA_FUNCTION_FAILED;

        ql_dbg(ql_dbg_taskm, vha, 0x8019,
            "%s return status=%d.\n", __func__, return_status);

        return return_status;
}

int
qla2x00_wait_for_chip_reset(scsi_qla_host_t *vha)
{
        int             return_status;
        unsigned long   wait_reset;
        struct qla_hw_data *ha = vha->hw;
        scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);

        wait_reset = jiffies + (MAX_LOOP_TIMEOUT * HZ);
        while (((test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags)) ||
            test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
            test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
            ha->dpc_active) && time_before(jiffies, wait_reset)) {

                msleep(1000);

                if (!test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) &&
                    ha->flags.chip_reset_done)
                        break;
        }
        if (ha->flags.chip_reset_done)
                return_status = QLA_SUCCESS;
        else
                return_status = QLA_FUNCTION_FAILED;

        return return_status;
}

static void
sp_get(struct srb *sp)
{
        atomic_inc(&sp->ref_count);
}

/**************************************************************************
* qla2xxx_eh_abort
*
* Description:
*    The abort function will abort the specified command.
*
* Input:
*    cmd = Linux SCSI command packet to be aborted.
*
* Returns:
*    Either SUCCESS or FAILED.
*
* Note:
*    Only return FAILED if command not returned by firmware.
**************************************************************************/
static int
qla2xxx_eh_abort(struct scsi_cmnd *cmd)
{
        scsi_qla_host_t *vha = shost_priv(cmd->device->host);
        srb_t *sp;
        int ret;
        unsigned int id, lun;
        unsigned long flags;
        int wait = 0;
        struct qla_hw_data *ha = vha->hw;

        if (!CMD_SP(cmd))
                return SUCCESS;

        ret = fc_block_scsi_eh(cmd);
        if (ret != 0)
                return ret;
        ret = SUCCESS;

        id = cmd->device->id;
        lun = cmd->device->lun;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        sp = (srb_t *) CMD_SP(cmd);
        if (!sp) {
                spin_unlock_irqrestore(&ha->hardware_lock, flags);
                return SUCCESS;
        }

        ql_dbg(ql_dbg_taskm, vha, 0x8002,
            "Aborting from RISC nexus=%ld:%d:%d sp=%p cmd=%p\n",
            vha->host_no, id, lun, sp, cmd);

        /* Get a reference to the sp and drop the lock.*/
        sp_get(sp);

        spin_unlock_irqrestore(&ha->hardware_lock, flags);
        if (ha->isp_ops->abort_command(sp)) {
                ret = FAILED;
                ql_dbg(ql_dbg_taskm, vha, 0x8003,
                    "Abort command mbx failed cmd=%p.\n", cmd);
        } else {
                ql_dbg(ql_dbg_taskm, vha, 0x8004,
                    "Abort command mbx success cmd=%p.\n", cmd);
                wait = 1;
        }

        spin_lock_irqsave(&ha->hardware_lock, flags);
        sp->done(ha, sp, 0);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        /* Did the command return during mailbox execution? */
        if (ret == FAILED && !CMD_SP(cmd))
                ret = SUCCESS;

        /* Wait for the command to be returned. */
        if (wait) {

                if (qla2x00_eh_wait_on_command(cmd) != QLA_SUCCESS) {
                        ql_log(ql_log_warn, vha, 0x8006,
                            "Abort handler timed out cmd=%p.\n", cmd);
                        ret = FAILED;
                }
        }

        ql_log(ql_log_info, vha, 0x801c,
            "Abort command issued nexus=%ld:%d:%d --  %d %x.\n",
            vha->host_no, id, lun, wait, ret);

        return ret;
}

int
qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *vha, unsigned int t,
        unsigned int l, enum nexus_wait_type type)
{
        int cnt, match, status;
        unsigned long flags;
        struct qla_hw_data *ha = vha->hw;
        struct req_que *req;
        srb_t *sp;
        struct scsi_cmnd *cmd;

        status = QLA_SUCCESS;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        req = vha->req;
        for (cnt = 1; status == QLA_SUCCESS &&
                cnt < req->num_outstanding_cmds; cnt++) {
                sp = req->outstanding_cmds[cnt];
                if (!sp)
                        continue;
                if (sp->type != SRB_SCSI_CMD)
                        continue;
                if (vha->vp_idx != sp->fcport->vha->vp_idx)
                        continue;
                match = 0;
                cmd = GET_CMD_SP(sp);
                switch (type) {
                case WAIT_HOST:
                        match = 1;
                        break;
                case WAIT_TARGET:
                        match = cmd->device->id == t;
                        break;
                case WAIT_LUN:
                        match = (cmd->device->id == t &&
                                cmd->device->lun == l);
                        break;
                }
                if (!match)
                        continue;

                spin_unlock_irqrestore(&ha->hardware_lock, flags);
                status = qla2x00_eh_wait_on_command(cmd);
                spin_lock_irqsave(&ha->hardware_lock, flags);
        }
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

        return status;
}

static char *reset_errors[] = {
        "HBA not online",
        "HBA not ready",
        "Task management failed",
        "Waiting for command completions",
};

static int
__qla2xxx_eh_generic_reset(char *name, enum nexus_wait_type type,
    struct scsi_cmnd *cmd, int (*do_reset)(struct fc_port *, unsigned int, int))
{
        scsi_qla_host_t *vha = shost_priv(cmd->device->host);
        fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
        int err;

        if (!fcport) {
                return FAILED;
        }

        err = fc_block_scsi_eh(cmd);
        if (err != 0)
                return err;

        ql_log(ql_log_info, vha, 0x8009,
            "%s RESET ISSUED nexus=%ld:%d:%d cmd=%p.\n", name, vha->host_no,
            cmd->device->id, cmd->device->lun, cmd);

        err = 0;
        if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS) {
                ql_log(ql_log_warn, vha, 0x800a,
                    "Wait for hba online failed for cmd=%p.\n", cmd);
                goto eh_reset_failed;
        }
        err = 2;
        if (do_reset(fcport, cmd->device->lun, cmd->request->cpu + 1)
                != QLA_SUCCESS) {
                ql_log(ql_log_warn, vha, 0x800c,
                    "do_reset failed for cmd=%p.\n", cmd);
                goto eh_reset_failed;
        }
        err = 3;
        if (qla2x00_eh_wait_for_pending_commands(vha, cmd->device->id,
            cmd->device->lun, type) != QLA_SUCCESS) {
                ql_log(ql_log_warn, vha, 0x800d,
                    "wait for pending cmds failed for cmd=%p.\n", cmd);
                goto eh_reset_failed;
        }

        ql_log(ql_log_info, vha, 0x800e,
            "%s RESET SUCCEEDED nexus:%ld:%d:%d cmd=%p.\n", name,
            vha->host_no, cmd->device->id, cmd->device->lun, cmd);

        return SUCCESS;

eh_reset_failed:
        ql_log(ql_log_info, vha, 0x800f,
            "%s RESET FAILED: %s nexus=%ld:%d:%d cmd=%p.\n", name,
            reset_errors[err], vha->host_no, cmd->device->id, cmd->device->lun,
            cmd);
        return FAILED;
}

static int
qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
{
        scsi_qla_host_t *vha = shost_priv(cmd->device->host);
        struct qla_hw_data *ha = vha->hw;

        return __qla2xxx_eh_generic_reset("DEVICE", WAIT_LUN, cmd,
            ha->isp_ops->lun_reset);
}

static int
qla2xxx_eh_target_reset(struct scsi_cmnd *cmd)
{
        scsi_qla_host_t *vha = shost_priv(cmd->device->host);
        struct qla_hw_data *ha = vha->hw;

        return __qla2xxx_eh_generic_reset("TARGET", WAIT_TARGET, cmd,
            ha->isp_ops->target_reset);
}

/**************************************************************************
* qla2xxx_eh_bus_reset
*
* Description:
*    The bus reset function will reset the bus and abort any executing
*    commands.
*
* Input:
*    cmd = Linux SCSI command packet of the command that cause the
*          bus reset.
*
* Returns:
*    SUCCESS/FAILURE (defined as macro in scsi.h).
*
**************************************************************************/
static int
qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
{
        scsi_qla_host_t *vha = shost_priv(cmd->device->host);
        fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
        int ret = FAILED;
        unsigned int id, lun;

        id = cmd->device->id;
        lun = cmd->device->lun;

        if (!fcport) {
                return ret;
        }

        ret = fc_block_scsi_eh(cmd);
        if (ret != 0)
                return ret;
        ret = FAILED;

        ql_log(ql_log_info, vha, 0x8012,
            "BUS RESET ISSUED nexus=%ld:%d:%d.\n", vha->host_no, id, lun);

        if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS) {
                ql_log(ql_log_fatal, vha, 0x8013,
                    "Wait for hba online failed board disabled.\n");
                goto eh_bus_reset_done;
        }

        if (qla2x00_loop_reset(vha) == QLA_SUCCESS)
                ret = SUCCESS;

        if (ret == FAILED)
                goto eh_bus_reset_done;

        /* Flush outstanding commands. */
        if (qla2x00_eh_wait_for_pending_commands(vha, 0, 0, WAIT_HOST) !=
            QLA_SUCCESS) {
                ql_log(ql_log_warn, vha, 0x8014,
                    "Wait for pending commands failed.\n");
                ret = FAILED;
        }

eh_bus_reset_done:
        ql_log(ql_log_warn, vha, 0x802b,
            "BUS RESET %s nexus=%ld:%d:%d.\n",
            (ret == FAILED) ? "FAILED" : "SUCCEEDED", vha->host_no, id, lun);

        return ret;
}

/**************************************************************************
* qla2xxx_eh_host_reset
*
* Description:
*    The reset function will reset the Adapter.
*
* Input:
*      cmd = Linux SCSI command packet of the command that cause the
*            adapter reset.
*
* Returns:
*      Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
static int
qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
{
        scsi_qla_host_t *vha = shost_priv(cmd->device->host);
        struct qla_hw_data *ha = vha->hw;
        int ret = FAILED;
        unsigned int id, lun;
        scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);

        id = cmd->device->id;
        lun = cmd->device->lun;

        ql_log(ql_log_info, vha, 0x8018,
            "ADAPTER RESET ISSUED nexus=%ld:%d:%d.\n", vha->host_no, id, lun);

        if (qla2x00_wait_for_reset_ready(vha) != QLA_SUCCESS)
                goto eh_host_reset_lock;

        if (vha != base_vha) {
                if (qla2x00_vp_abort_isp(vha))
                        goto eh_host_reset_lock;
        } else {
                if (IS_P3P_TYPE(vha->hw)) {
                        if (!qla82xx_fcoe_ctx_reset(vha)) {
                                /* Ctx reset success */
                                ret = SUCCESS;
                                goto eh_host_reset_lock;
                        }
                        /* fall thru if ctx reset failed */
                }
                if (ha->wq)
                        flush_workqueue(ha->wq);

                set_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags);
                if (ha->isp_ops->abort_isp(base_vha)) {
                        clear_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags);
                        /* failed. schedule dpc to try */
                        set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);

                        if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS) {
                                ql_log(ql_log_warn, vha, 0x802a,
                                    "wait for hba online failed.\n");
                                goto eh_host_reset_lock;
                        }
                }
                clear_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags);
        }

        /* Waiting for command to be returned to OS.*/
        if (qla2x00_eh_wait_for_pending_commands(vha, 0, 0, WAIT_HOST) ==
                QLA_SUCCESS)
                ret = SUCCESS;

eh_host_reset_lock:
        ql_log(ql_log_info, vha, 0x8017,
            "ADAPTER RESET %s nexus=%ld:%d:%d.\n",
            (ret == FAILED) ? "FAILED" : "SUCCEEDED", vha->host_no, id, lun);

        return ret;
}

/*
* qla2x00_loop_reset
*      Issue loop reset.
*
* Input:
*      ha = adapter block pointer.
*
* Returns:
*      0 = success
*/
int
qla2x00_loop_reset(scsi_qla_host_t *vha)
{
        int ret;
        struct fc_port *fcport;
        struct qla_hw_data *ha = vha->hw;

        if (IS_QLAFX00(ha)) {
                return qlafx00_loop_reset(vha);
        }

        if (ql2xtargetreset == 1 && ha->flags.enable_target_reset) {
                list_for_each_entry(fcport, &vha->vp_fcports, list) {
                        if (fcport->port_type != FCT_TARGET)
                                continue;

                        ret = ha->isp_ops->target_reset(fcport, 0, 0);
                        if (ret != QLA_SUCCESS) {
                                ql_dbg(ql_dbg_taskm, vha, 0x802c,
                                    "Bus Reset failed: Reset=%d "
                                    "d_id=%x.\n", ret, fcport->d_id.b24);
                        }
                }
        }


        if (ha->flags.enable_lip_full_login && !IS_CNA_CAPABLE(ha)) {
                atomic_set(&vha->loop_state, LOOP_DOWN);
                atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
                qla2x00_mark_all_devices_lost(vha, 0);
                ret = qla2x00_full_login_lip(vha);
                if (ret != QLA_SUCCESS) {
                        ql_dbg(ql_dbg_taskm, vha, 0x802d,
                            "full_login_lip=%d.\n", ret);
                }
        }

        if (ha->flags.enable_lip_reset) {
                ret = qla2x00_lip_reset(vha);
                if (ret != QLA_SUCCESS)
                        ql_dbg(ql_dbg_taskm, vha, 0x802e,
                            "lip_reset failed (%d).\n", ret);
        }

        /* Issue marker command only when we are going to start the I/O */
        vha->marker_needed = 1;

        return QLA_SUCCESS;
}

void
qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
{
        int que, cnt;
        unsigned long flags;
        srb_t *sp;
        struct qla_hw_data *ha = vha->hw;
        struct req_que *req;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        for (que = 0; que < ha->max_req_queues; que++) {
                req = ha->req_q_map[que];
                if (!req)
                        continue;
                if (!req->outstanding_cmds)
                        continue;
                for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
                        sp = req->outstanding_cmds[cnt];
                        if (sp) {
                                req->outstanding_cmds[cnt] = NULL;
                                sp->done(vha, sp, res);
                        }
                }
        }
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static int
qla2xxx_slave_alloc(struct scsi_device *sdev)
{
        struct fc_rport *rport = starget_to_rport(scsi_target(sdev));

        if (!rport || fc_remote_port_chkready(rport))
                return -ENXIO;

        sdev->hostdata = *(fc_port_t **)rport->dd_data;

        return 0;
}

static int
qla2xxx_slave_configure(struct scsi_device *sdev)
{
        scsi_qla_host_t *vha = shost_priv(sdev->host);
        struct req_que *req = vha->req;

        if (IS_T10_PI_CAPABLE(vha->hw))
                blk_queue_update_dma_alignment(sdev->request_queue, 0x7);

        if (sdev->tagged_supported)
                scsi_activate_tcq(sdev, req->max_q_depth);
        else
                scsi_deactivate_tcq(sdev, req->max_q_depth);
        return 0;
}

static void
qla2xxx_slave_destroy(struct scsi_device *sdev)
{
        sdev->hostdata = NULL;
}

static void qla2x00_handle_queue_full(struct scsi_device *sdev, int qdepth)
{
        fc_port_t *fcport = (struct fc_port *) sdev->hostdata;

        if (!scsi_track_queue_full(sdev, qdepth))
                return;

        ql_dbg(ql_dbg_io, fcport->vha, 0x3029,
            "Queue depth adjusted-down to %d for nexus=%ld:%d:%d.\n",
            sdev->queue_depth, fcport->vha->host_no, sdev->id, sdev->lun);
}

static void qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, int qdepth)
{
        fc_port_t *fcport = sdev->hostdata;
        struct scsi_qla_host *vha = fcport->vha;
        struct req_que *req = NULL;

        req = vha->req;
        if (!req)
                return;

        if (req->max_q_depth <= sdev->queue_depth || req->max_q_depth < qdepth)
                return;

        if (sdev->ordered_tags)
                scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, qdepth);
        else
                scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, qdepth);

        ql_dbg(ql_dbg_io, vha, 0x302a,
            "Queue depth adjusted-up to %d for nexus=%ld:%d:%d.\n",
            sdev->queue_depth, fcport->vha->host_no, sdev->id, sdev->lun);
}

static int
qla2x00_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
        switch (reason) {
        case SCSI_QDEPTH_DEFAULT:
                scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
                break;
        case SCSI_QDEPTH_QFULL:
                qla2x00_handle_queue_full(sdev, qdepth);
                break;
        case SCSI_QDEPTH_RAMP_UP:
                qla2x00_adjust_sdev_qdepth_up(sdev, qdepth);
                break;
        default:
                return -EOPNOTSUPP;
        }

        return sdev->queue_depth;
}

static int
qla2x00_change_queue_type(struct scsi_device *sdev, int tag_type)
{
        if (sdev->tagged_supported) {
                scsi_set_tag_type(sdev, tag_type);
                if (tag_type)
                        scsi_activate_tcq(sdev, sdev->queue_depth);
                else
                        scsi_deactivate_tcq(sdev, sdev->queue_depth);
        } else
                tag_type = 0;

        return tag_type;
}

static void
qla2x00_host_ramp_down_queuedepth(scsi_qla_host_t *vha)
{
        scsi_qla_host_t *vp;
        struct Scsi_Host *shost;
        struct scsi_device *sdev;
        struct qla_hw_data *ha = vha->hw;
        unsigned long flags;

        ha->host_last_rampdown_time = jiffies;

        if (ha->cfg_lun_q_depth <= vha->host->cmd_per_lun)
                return;

        if ((ha->cfg_lun_q_depth / 2) < vha->host->cmd_per_lun)
                ha->cfg_lun_q_depth = vha->host->cmd_per_lun;
        else
                ha->cfg_lun_q_depth = ha->cfg_lun_q_depth / 2;

        /*
         * Geometrically ramp down the queue depth for all devices on this
         * adapter
         */
        spin_lock_irqsave(&ha->vport_slock, flags);
        list_for_each_entry(vp, &ha->vp_list, list) {
                shost = vp->host;
                shost_for_each_device(sdev, shost) {
                        if (sdev->queue_depth > shost->cmd_per_lun) {
                                if (sdev->queue_depth < ha->cfg_lun_q_depth)
                                        continue;
                                ql_dbg(ql_dbg_io, vp, 0x3031,
                                    "%ld:%d:%d: Ramping down queue depth to %d",
                                    vp->host_no, sdev->id, sdev->lun,
                                    ha->cfg_lun_q_depth);
                                qla2x00_change_queue_depth(sdev,
                                    ha->cfg_lun_q_depth, SCSI_QDEPTH_DEFAULT);
                        }
                }
        }
        spin_unlock_irqrestore(&ha->vport_slock, flags);

        return;
}

static void
qla2x00_host_ramp_up_queuedepth(scsi_qla_host_t *vha)
{
        scsi_qla_host_t *vp;
        struct Scsi_Host *shost;
        struct scsi_device *sdev;
        struct qla_hw_data *ha = vha->hw;
        unsigned long flags;

        ha->host_last_rampup_time = jiffies;
        ha->cfg_lun_q_depth++;

        /*
         * Linearly ramp up the queue depth for all devices on this
         * adapter
         */
        spin_lock_irqsave(&ha->vport_slock, flags);
        list_for_each_entry(vp, &ha->vp_list, list) {
                shost = vp->host;
                shost_for_each_device(sdev, shost) {
                        if (sdev->queue_depth > ha->cfg_lun_q_depth)
                                continue;
                        qla2x00_change_queue_depth(sdev, ha->cfg_lun_q_depth,
                            SCSI_QDEPTH_RAMP_UP);
                }
        }
        spin_unlock_irqrestore(&ha->vport_slock, flags);

        return;
}

/**
 * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
 * @ha: HA context
 *
 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
 * supported addressing method.
 */
static void
qla2x00_config_dma_addressing(struct qla_hw_data *ha)
{
        /* Assume a 32bit DMA mask. */
        ha->flags.enable_64bit_addressing = 0;

        if (!dma_set_mask(&ha->pdev->dev, DMA_BIT_MASK(64))) {
                /* Any upper-dword bits set? */
                if (MSD(dma_get_required_mask(&ha->pdev->dev)) &&
                    !pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
                        /* Ok, a 64bit DMA mask is applicable. */
                        ha->flags.enable_64bit_addressing = 1;
                        ha->isp_ops->calc_req_entries = qla2x00_calc_iocbs_64;
                        ha->isp_ops->build_iocbs = qla2x00_build_scsi_iocbs_64;
                        return;
                }
        }

        dma_set_mask(&ha->pdev->dev, DMA_BIT_MASK(32));
        pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(32));
}

static void
qla2x00_enable_intrs(struct qla_hw_data *ha)
{
        unsigned long flags = 0;
        struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        ha->interrupts_on = 1;
        /* enable risc and host interrupts */
        WRT_REG_WORD(&reg->ictrl, ICR_EN_INT | ICR_EN_RISC);
        RD_REG_WORD(&reg->ictrl);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);

}

static void
qla2x00_disable_intrs(struct qla_hw_data *ha)
{
        unsigned long flags = 0;
        struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        ha->interrupts_on = 0;
        /* disable risc and host interrupts */
        WRT_REG_WORD(&reg->ictrl, 0);
        RD_REG_WORD(&reg->ictrl);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static void
qla24xx_enable_intrs(struct qla_hw_data *ha)
{
        unsigned long flags = 0;
        struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

        spin_lock_irqsave(&ha->hardware_lock, flags);
        ha->interrupts_on = 1;
        WRT_REG_DWORD(&reg->ictrl, ICRX_EN_RISC_INT);
        RD_REG_DWORD(&reg->ictrl);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static void
qla24xx_disable_intrs(struct qla_hw_data *ha)
{
        unsigned long flags = 0;
        struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

        if (IS_NOPOLLING_TYPE(ha))
                return;
        spin_lock_irqsave(&ha->hardware_lock, flags);
        ha->interrupts_on = 0;
        WRT_REG_DWORD(&reg->ictrl, 0);
        RD_REG_DWORD(&reg->ictrl);
        spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static int
qla2x00_iospace_config(struct qla_hw_data *ha)
{
        resource_size_t pio;
        uint16_t msix;
        int cpus;

        if (pci_request_selected_regions(ha->pdev, ha->bars,
            QLA2XXX_DRIVER_NAME)) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x0011,
                    "Failed to reserve PIO/MMIO regions (%s), aborting.\n",
                    pci_name(ha->pdev));
                goto iospace_error_exit;
        }
        if (!(ha->bars & 1))
                goto skip_pio;

        /* We only need PIO for Flash operations on ISP2312 v2 chips. */
        pio = pci_resource_start(ha->pdev, 0);
        if (pci_resource_flags(ha->pdev, 0) & IORESOURCE_IO) {
                if (pci_resource_len(ha->pdev, 0) < MIN_IOBASE_LEN) {
                        ql_log_pci(ql_log_warn, ha->pdev, 0x0012,
                            "Invalid pci I/O region size (%s).\n",
                            pci_name(ha->pdev));
                        pio = 0;
                }
        } else {
                ql_log_pci(ql_log_warn, ha->pdev, 0x0013,
                    "Region #0 no a PIO resource (%s).\n",
                    pci_name(ha->pdev));
                pio = 0;
        }
        ha->pio_address = pio;
        ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0014,
            "PIO address=%llu.\n",
            (unsigned long long)ha->pio_address);

skip_pio:
        /* Use MMIO operations for all accesses. */
        if (!(pci_resource_flags(ha->pdev, 1) & IORESOURCE_MEM)) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x0015,
                    "Region #1 not an MMIO resource (%s), aborting.\n",
                    pci_name(ha->pdev));
                goto iospace_error_exit;
        }
        if (pci_resource_len(ha->pdev, 1) < MIN_IOBASE_LEN) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x0016,
                    "Invalid PCI mem region size (%s), aborting.\n",
                    pci_name(ha->pdev));
                goto iospace_error_exit;
        }

        ha->iobase = ioremap(pci_resource_start(ha->pdev, 1), MIN_IOBASE_LEN);
        if (!ha->iobase) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x0017,
                    "Cannot remap MMIO (%s), aborting.\n",
                    pci_name(ha->pdev));
                goto iospace_error_exit;
        }

        /* Determine queue resources */
        ha->max_req_queues = ha->max_rsp_queues = 1;
        if ((ql2xmaxqueues <= 1 && !ql2xmultique_tag) ||
                (ql2xmaxqueues > 1 && ql2xmultique_tag) ||
                (!IS_QLA25XX(ha) && !IS_QLA81XX(ha)))
                goto mqiobase_exit;

        ha->mqiobase = ioremap(pci_resource_start(ha->pdev, 3),
                        pci_resource_len(ha->pdev, 3));
        if (ha->mqiobase) {
                ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0018,
                    "MQIO Base=%p.\n", ha->mqiobase);
                /* Read MSIX vector size of the board */
                pci_read_config_word(ha->pdev, QLA_PCI_MSIX_CONTROL, &msix);
                ha->msix_count = msix;
                /* Max queues are bounded by available msix vectors */
                /* queue 0 uses two msix vectors */
                if (ql2xmultique_tag) {
                        cpus = num_online_cpus();
                        ha->max_rsp_queues = (ha->msix_count - 1 > cpus) ?
                                (cpus + 1) : (ha->msix_count - 1);
                        ha->max_req_queues = 2;
                } else if (ql2xmaxqueues > 1) {
                        ha->max_req_queues = ql2xmaxqueues > QLA_MQ_SIZE ?
                            QLA_MQ_SIZE : ql2xmaxqueues;
                        ql_dbg_pci(ql_dbg_multiq, ha->pdev, 0xc008,
                            "QoS mode set, max no of request queues:%d.\n",
                            ha->max_req_queues);
                        ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0019,
                            "QoS mode set, max no of request queues:%d.\n",
                            ha->max_req_queues);
                }
                ql_log_pci(ql_log_info, ha->pdev, 0x001a,
                    "MSI-X vector count: %d.\n", msix);
        } else
                ql_log_pci(ql_log_info, ha->pdev, 0x001b,
                    "BAR 3 not enabled.\n");

mqiobase_exit:
        ha->msix_count = ha->max_rsp_queues + 1;
        ql_dbg_pci(ql_dbg_init, ha->pdev, 0x001c,
            "MSIX Count:%d.\n", ha->msix_count);
        return (0);

iospace_error_exit:
        return (-ENOMEM);
}


static int
qla83xx_iospace_config(struct qla_hw_data *ha)
{
        uint16_t msix;
        int cpus;

        if (pci_request_selected_regions(ha->pdev, ha->bars,
            QLA2XXX_DRIVER_NAME)) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x0117,
                    "Failed to reserve PIO/MMIO regions (%s), aborting.\n",
                    pci_name(ha->pdev));

                goto iospace_error_exit;
        }

        /* Use MMIO operations for all accesses. */
        if (!(pci_resource_flags(ha->pdev, 0) & IORESOURCE_MEM)) {
                ql_log_pci(ql_log_warn, ha->pdev, 0x0118,
                    "Invalid pci I/O region size (%s).\n",
                    pci_name(ha->pdev));
                goto iospace_error_exit;
        }
        if (pci_resource_len(ha->pdev, 0) < MIN_IOBASE_LEN) {
                ql_log_pci(ql_log_warn, ha->pdev, 0x0119,
                    "Invalid PCI mem region size (%s), aborting\n",
                        pci_name(ha->pdev));
                goto iospace_error_exit;
        }

        ha->iobase = ioremap(pci_resource_start(ha->pdev, 0), MIN_IOBASE_LEN);
        if (!ha->iobase) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x011a,
                    "Cannot remap MMIO (%s), aborting.\n",
                    pci_name(ha->pdev));
                goto iospace_error_exit;
        }

        /* 64bit PCI BAR - BAR2 will correspoond to region 4 */
        /* 83XX 26XX always use MQ type access for queues
         * - mbar 2, a.k.a region 4 */
        ha->max_req_queues = ha->max_rsp_queues = 1;
        ha->mqiobase = ioremap(pci_resource_start(ha->pdev, 4),
                        pci_resource_len(ha->pdev, 4));

        if (!ha->mqiobase) {
                ql_log_pci(ql_log_fatal, ha->pdev, 0x011d,
                    "BAR2/region4 not enabled\n");
                goto mqiobase_exit;
        }

        ha->msixbase = ioremap(pci_resource_start(ha->pdev, 2),
                        pci_resource_len(ha->pdev, 2));
        if (ha->msixbase) {
                /* Read MSIX vector size of the board */
                pci_read_config_word(ha->pdev,
                    QLA_83XX_PCI_MSIX_CONTROL, &msix);
                ha->msix_count = msix;
                /* Max queues are bounded by available msix vectors */
                /* queue 0 uses two msix vectors */
                if (ql2xmultique_tag) {
                        cpus = num_online_cpus();
                        ha->max_rsp_queues = (ha->msix_count - 1 > cpus) ?
                                (cpus + 1) : (ha->msix_count - 1);
                        ha->max_req_queues = 2;
                } else if (ql2xmaxqueues > 1) {
                        ha->max_req_queues = ql2xmaxqueues > QLA_MQ_SIZE ?
                                                QLA_MQ_SIZE : ql2xmaxqueues;
                        ql_dbg_pci(ql_dbg_multiq, ha->pdev, 0xc00c,
                            "QoS mode set, max no of request queues:%d.\n",
                            ha->max_req_queues);
                        ql_dbg_pci(ql_dbg_init, ha->pdev, 0x011b,
                            "QoS mode set, max no of request queues:%d.\n",
                            ha->max_req_queues);
                }
                ql_log_pci(ql_log_info, ha->pdev, 0x011c,
                    "MSI-X vector count: %d.\n", msix);
        } else
                ql_log_pci(ql_log_info, ha->pdev, 0x011e,
                    "BAR 1 not enabled.\n");

mqiobase_exit:
        ha->msix_count = ha->max_rsp_queues + 1;

        qlt_83xx_iospace_config(ha);

        ql_dbg_pci(ql_dbg_init, ha->pdev, 0x011f,
            "MSIX Count:%d.\n", ha->msix_count);
        return 0;

iospace_error_exit:
        return -ENOMEM;
}

static struct isp_operations qla2100_isp_ops = {
        .pci_config             = qla2100_pci_config,
        .reset_chip             = qla2x00_reset_chip,
        .chip_diag              = qla2x00_chip_diag,
        .config_rings           = qla2x00_config_rings,
        .reset_adapter          = qla2x00_reset_adapter,
        .nvram_config           = qla2x00_nvram_config,
        .update_fw_options      = qla2x00_update_fw_options,
        .load_risc              = qla2x00_load_risc,
        .pci_info_str           = qla2x00_pci_info_str,
        .fw_version_str         = qla2x00_fw_version_str,
        .intr_handler           = qla2100_intr_handler,
        .enable_intrs           = qla2x00_enable_intrs,
        .disable_intrs          = qla2x00_disable_intrs,
        .abort_command          = qla2x00_abort_command,
        .target_reset           = qla2x00_abort_target,
        .lun_reset              = qla2x00_lun_reset,
        .fabric_login           = qla2x00_login_fabric,
        .fabric_logout          = qla2x00_fabric_logout,
        .calc_req_entries       = qla2x00_calc_iocbs_32,
        .build_iocbs            = qla2x00_build_scsi_iocbs_32,
        .prep_ms_iocb           = qla2x00_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla2x00_prep_ms_fdmi_iocb,
        .read_nvram             = qla2x00_read_nvram_data,
        .write_nvram            = qla2x00_write_nvram_data,
        .fw_dump                = qla2100_fw_dump,
        .beacon_on              = NULL,
        .beacon_off             = NULL,
        .beacon_blink           = NULL,
        .read_optrom            = qla2x00_read_optrom_data,
        .write_optrom           = qla2x00_write_optrom_data,
        .get_flash_version      = qla2x00_get_flash_version,
        .start_scsi             = qla2x00_start_scsi,
        .abort_isp              = qla2x00_abort_isp,
        .iospace_config         = qla2x00_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qla2300_isp_ops = {
        .pci_config             = qla2300_pci_config,
        .reset_chip             = qla2x00_reset_chip,
        .chip_diag              = qla2x00_chip_diag,
        .config_rings           = qla2x00_config_rings,
        .reset_adapter          = qla2x00_reset_adapter,
        .nvram_config           = qla2x00_nvram_config,
        .update_fw_options      = qla2x00_update_fw_options,
        .load_risc              = qla2x00_load_risc,
        .pci_info_str           = qla2x00_pci_info_str,
        .fw_version_str         = qla2x00_fw_version_str,
        .intr_handler           = qla2300_intr_handler,
        .enable_intrs           = qla2x00_enable_intrs,
        .disable_intrs          = qla2x00_disable_intrs,
        .abort_command          = qla2x00_abort_command,
        .target_reset           = qla2x00_abort_target,
        .lun_reset              = qla2x00_lun_reset,
        .fabric_login           = qla2x00_login_fabric,
        .fabric_logout          = qla2x00_fabric_logout,
        .calc_req_entries       = qla2x00_calc_iocbs_32,
        .build_iocbs            = qla2x00_build_scsi_iocbs_32,
        .prep_ms_iocb           = qla2x00_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla2x00_prep_ms_fdmi_iocb,
        .read_nvram             = qla2x00_read_nvram_data,
        .write_nvram            = qla2x00_write_nvram_data,
        .fw_dump                = qla2300_fw_dump,
        .beacon_on              = qla2x00_beacon_on,
        .beacon_off             = qla2x00_beacon_off,
        .beacon_blink           = qla2x00_beacon_blink,
        .read_optrom            = qla2x00_read_optrom_data,
        .write_optrom           = qla2x00_write_optrom_data,
        .get_flash_version      = qla2x00_get_flash_version,
        .start_scsi             = qla2x00_start_scsi,
        .abort_isp              = qla2x00_abort_isp,
        .iospace_config         = qla2x00_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qla24xx_isp_ops = {
        .pci_config             = qla24xx_pci_config,
        .reset_chip             = qla24xx_reset_chip,
        .chip_diag              = qla24xx_chip_diag,
        .config_rings           = qla24xx_config_rings,
        .reset_adapter          = qla24xx_reset_adapter,
        .nvram_config           = qla24xx_nvram_config,
        .update_fw_options      = qla24xx_update_fw_options,
        .load_risc              = qla24xx_load_risc,
        .pci_info_str           = qla24xx_pci_info_str,
        .fw_version_str         = qla24xx_fw_version_str,
        .intr_handler           = qla24xx_intr_handler,
        .enable_intrs           = qla24xx_enable_intrs,
        .disable_intrs          = qla24xx_disable_intrs,
        .abort_command          = qla24xx_abort_command,
        .target_reset           = qla24xx_abort_target,
        .lun_reset              = qla24xx_lun_reset,
        .fabric_login           = qla24xx_login_fabric,
        .fabric_logout          = qla24xx_fabric_logout,
        .calc_req_entries       = NULL,
        .build_iocbs            = NULL,
        .prep_ms_iocb           = qla24xx_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla24xx_prep_ms_fdmi_iocb,
        .read_nvram             = qla24xx_read_nvram_data,
        .write_nvram            = qla24xx_write_nvram_data,
        .fw_dump                = qla24xx_fw_dump,
        .beacon_on              = qla24xx_beacon_on,
        .beacon_off             = qla24xx_beacon_off,
        .beacon_blink           = qla24xx_beacon_blink,
        .read_optrom            = qla24xx_read_optrom_data,
        .write_optrom           = qla24xx_write_optrom_data,
        .get_flash_version      = qla24xx_get_flash_version,
        .start_scsi             = qla24xx_start_scsi,
        .abort_isp              = qla2x00_abort_isp,
        .iospace_config         = qla2x00_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qla25xx_isp_ops = {
        .pci_config             = qla25xx_pci_config,
        .reset_chip             = qla24xx_reset_chip,
        .chip_diag              = qla24xx_chip_diag,
        .config_rings           = qla24xx_config_rings,
        .reset_adapter          = qla24xx_reset_adapter,
        .nvram_config           = qla24xx_nvram_config,
        .update_fw_options      = qla24xx_update_fw_options,
        .load_risc              = qla24xx_load_risc,
        .pci_info_str           = qla24xx_pci_info_str,
        .fw_version_str         = qla24xx_fw_version_str,
        .intr_handler           = qla24xx_intr_handler,
        .enable_intrs           = qla24xx_enable_intrs,
        .disable_intrs          = qla24xx_disable_intrs,
        .abort_command          = qla24xx_abort_command,
        .target_reset           = qla24xx_abort_target,
        .lun_reset              = qla24xx_lun_reset,
        .fabric_login           = qla24xx_login_fabric,
        .fabric_logout          = qla24xx_fabric_logout,
        .calc_req_entries       = NULL,
        .build_iocbs            = NULL,
        .prep_ms_iocb           = qla24xx_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla24xx_prep_ms_fdmi_iocb,
        .read_nvram             = qla25xx_read_nvram_data,
        .write_nvram            = qla25xx_write_nvram_data,
        .fw_dump                = qla25xx_fw_dump,
        .beacon_on              = qla24xx_beacon_on,
        .beacon_off             = qla24xx_beacon_off,
        .beacon_blink           = qla24xx_beacon_blink,
        .read_optrom            = qla25xx_read_optrom_data,
        .write_optrom           = qla24xx_write_optrom_data,
        .get_flash_version      = qla24xx_get_flash_version,
        .start_scsi             = qla24xx_dif_start_scsi,
        .abort_isp              = qla2x00_abort_isp,
        .iospace_config         = qla2x00_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qla81xx_isp_ops = {
        .pci_config             = qla25xx_pci_config,
        .reset_chip             = qla24xx_reset_chip,
        .chip_diag              = qla24xx_chip_diag,
        .config_rings           = qla24xx_config_rings,

        .reset_adapter          = qla24xx_reset_adapter,
        .nvram_config           = qla81xx_nvram_config,
        .update_fw_options      = qla81xx_update_fw_options,
        .load_risc              = qla81xx_load_risc,
        .pci_info_str           = qla24xx_pci_info_str,
        .fw_version_str         = qla24xx_fw_version_str,
        .intr_handler           = qla24xx_intr_handler,
        .enable_intrs           = qla24xx_enable_intrs,
        .disable_intrs          = qla24xx_disable_intrs,
        .abort_command          = qla24xx_abort_command,
        .target_reset           = qla24xx_abort_target,
        .lun_reset              = qla24xx_lun_reset,
        .fabric_login           = qla24xx_login_fabric,
        .fabric_logout          = qla24xx_fabric_logout,
        .calc_req_entries       = NULL,
        .build_iocbs            = NULL,
        .prep_ms_iocb           = qla24xx_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla24xx_prep_ms_fdmi_iocb,
        .read_nvram             = NULL,
        .write_nvram            = NULL,
        .fw_dump                = qla81xx_fw_dump,
        .beacon_on              = qla24xx_beacon_on,
        .beacon_off             = qla24xx_beacon_off,
        .beacon_blink           = qla83xx_beacon_blink,
        .read_optrom            = qla25xx_read_optrom_data,
        .write_optrom           = qla24xx_write_optrom_data,
        .get_flash_version      = qla24xx_get_flash_version,
        .start_scsi             = qla24xx_dif_start_scsi,
        .abort_isp              = qla2x00_abort_isp,
        .iospace_config         = qla2x00_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qla82xx_isp_ops = {
        .pci_config             = qla82xx_pci_config,
        .reset_chip             = qla82xx_reset_chip,
        .chip_diag              = qla24xx_chip_diag,
        .config_rings           = qla82xx_config_rings,
        .reset_adapter          = qla24xx_reset_adapter,
        .nvram_config           = qla81xx_nvram_config,
        .update_fw_options      = qla24xx_update_fw_options,
        .load_risc              = qla82xx_load_risc,
        .pci_info_str           = qla24xx_pci_info_str,
        .fw_version_str         = qla24xx_fw_version_str,
        .intr_handler           = qla82xx_intr_handler,
        .enable_intrs           = qla82xx_enable_intrs,
        .disable_intrs          = qla82xx_disable_intrs,
        .abort_command          = qla24xx_abort_command,
        .target_reset           = qla24xx_abort_target,
        .lun_reset              = qla24xx_lun_reset,
        .fabric_login           = qla24xx_login_fabric,
        .fabric_logout          = qla24xx_fabric_logout,
        .calc_req_entries       = NULL,
        .build_iocbs            = NULL,
        .prep_ms_iocb           = qla24xx_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla24xx_prep_ms_fdmi_iocb,
        .read_nvram             = qla24xx_read_nvram_data,
        .write_nvram            = qla24xx_write_nvram_data,
        .fw_dump                = qla24xx_fw_dump,
        .beacon_on              = qla82xx_beacon_on,
        .beacon_off             = qla82xx_beacon_off,
        .beacon_blink           = NULL,
        .read_optrom            = qla82xx_read_optrom_data,
        .write_optrom           = qla82xx_write_optrom_data,
        .get_flash_version      = qla82xx_get_flash_version,
        .start_scsi             = qla82xx_start_scsi,
        .abort_isp              = qla82xx_abort_isp,
        .iospace_config         = qla82xx_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qla8044_isp_ops = {
        .pci_config             = qla82xx_pci_config,
        .reset_chip             = qla82xx_reset_chip,
        .chip_diag              = qla24xx_chip_diag,
        .config_rings           = qla82xx_config_rings,
        .reset_adapter          = qla24xx_reset_adapter,
        .nvram_config           = qla81xx_nvram_config,
        .update_fw_options      = qla24xx_update_fw_options,
        .load_risc              = qla82xx_load_risc,
        .pci_info_str           = qla24xx_pci_info_str,
        .fw_version_str         = qla24xx_fw_version_str,
        .intr_handler           = qla8044_intr_handler,
        .enable_intrs           = qla82xx_enable_intrs,
        .disable_intrs          = qla82xx_disable_intrs,
        .abort_command          = qla24xx_abort_command,
        .target_reset           = qla24xx_abort_target,
        .lun_reset              = qla24xx_lun_reset,
        .fabric_login           = qla24xx_login_fabric,
        .fabric_logout          = qla24xx_fabric_logout,
        .calc_req_entries       = NULL,
        .build_iocbs            = NULL,
        .prep_ms_iocb           = qla24xx_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla24xx_prep_ms_fdmi_iocb,
        .read_nvram             = NULL,
        .write_nvram            = NULL,
        .fw_dump                = qla24xx_fw_dump,
        .beacon_on              = qla82xx_beacon_on,
        .beacon_off             = qla82xx_beacon_off,
        .beacon_blink           = NULL,
        .read_optrom            = qla82xx_read_optrom_data,
        .write_optrom           = qla8044_write_optrom_data,
        .get_flash_version      = qla82xx_get_flash_version,
        .start_scsi             = qla82xx_start_scsi,
        .abort_isp              = qla8044_abort_isp,
        .iospace_config         = qla82xx_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qla83xx_isp_ops = {
        .pci_config             = qla25xx_pci_config,
        .reset_chip             = qla24xx_reset_chip,
        .chip_diag              = qla24xx_chip_diag,
        .config_rings           = qla24xx_config_rings,
        .reset_adapter          = qla24xx_reset_adapter,
        .nvram_config           = qla81xx_nvram_config,
        .update_fw_options      = qla81xx_update_fw_options,
        .load_risc              = qla81xx_load_risc,
        .pci_info_str           = qla24xx_pci_info_str,
        .fw_version_str         = qla24xx_fw_version_str,
        .intr_handler           = qla24xx_intr_handler,
        .enable_intrs           = qla24xx_enable_intrs,
        .disable_intrs          = qla24xx_disable_intrs,
        .abort_command          = qla24xx_abort_command,
        .target_reset           = qla24xx_abort_target,
        .lun_reset              = qla24xx_lun_reset,
        .fabric_login           = qla24xx_login_fabric,
        .fabric_logout          = qla24xx_fabric_logout,
        .calc_req_entries       = NULL,
        .build_iocbs            = NULL,
        .prep_ms_iocb           = qla24xx_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla24xx_prep_ms_fdmi_iocb,
        .read_nvram             = NULL,
        .write_nvram            = NULL,
        .fw_dump                = qla83xx_fw_dump,
        .beacon_on              = qla24xx_beacon_on,
        .beacon_off             = qla24xx_beacon_off,
        .beacon_blink           = qla83xx_beacon_blink,
        .read_optrom            = qla25xx_read_optrom_data,
        .write_optrom           = qla24xx_write_optrom_data,
        .get_flash_version      = qla24xx_get_flash_version,
        .start_scsi             = qla24xx_dif_start_scsi,
        .abort_isp              = qla2x00_abort_isp,
        .iospace_config         = qla83xx_iospace_config,
        .initialize_adapter     = qla2x00_initialize_adapter,
};

static struct isp_operations qlafx00_isp_ops = {
        .pci_config             = qlafx00_pci_config,
        .reset_chip             = qlafx00_soft_reset,
        .chip_diag              = qlafx00_chip_diag,
        .config_rings           = qlafx00_config_rings,
        .reset_adapter          = qlafx00_soft_reset,
        .nvram_config           = NULL,
        .update_fw_options      = NULL,
        .load_risc              = NULL,
        .pci_info_str           = qlafx00_pci_info_str,
        .fw_version_str         = qlafx00_fw_version_str,
        .intr_handler           = qlafx00_intr_handler,
        .enable_intrs           = qlafx00_enable_intrs,
        .disable_intrs          = qlafx00_disable_intrs,
        .abort_command          = qlafx00_abort_command,
        .target_reset           = qlafx00_abort_target,
        .lun_reset              = qlafx00_lun_reset,
        .fabric_login           = NULL,
        .fabric_logout          = NULL,
        .calc_req_entries       = NULL,
        .build_iocbs            = NULL,
        .prep_ms_iocb           = qla24xx_prep_ms_iocb,
        .prep_ms_fdmi_iocb      = qla24xx_prep_ms_fdmi_iocb,
        .read_nvram             = qla24xx_read_nvram_data,
        .write_nvram            = qla24xx_write_nvram_data,
        .fw_dump                = NULL,
        .beacon_on              = qla24xx_beacon_on,
        .beacon_off             = qla24xx_beacon_off,
        .beacon_blink           = NULL,
        .read_optrom            = qla24xx_read_optrom_data,
        .write_optrom           = qla24xx_write_optrom_data,
        .get_flash_version      = qla24xx_get_flash_version,
        .start_scsi             = qlafx00_start_scsi,
        .abort_isp              = qlafx00_abort_isp,
        .iospace_config         = qlafx00_iospace_config,
        .initialize_adapter     = qlafx00_initialize_adapter,
};

static inline void
qla2x00_set_isp_flags(struct qla_hw_data *ha)
{
        ha->device_type = DT_EXTENDED_IDS;
        switch (ha->pdev->device) {
        case PCI_DEVICE_ID_QLOGIC_ISP2100:
                ha->device_type |= DT_ISP2100;
                ha->device_type &= ~DT_EXTENDED_IDS;
                ha->fw_srisc_address = RISC_START_ADDRESS_2100;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2200:
                ha->device_type |= DT_ISP2200;
                ha->device_type &= ~DT_EXTENDED_IDS;
                ha->fw_srisc_address = RISC_START_ADDRESS_2100;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2300:
                ha->device_type |= DT_ISP2300;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->fw_srisc_address = RISC_START_ADDRESS_2300;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2312:
                ha->device_type |= DT_ISP2312;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->fw_srisc_address = RISC_START_ADDRESS_2300;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2322:
                ha->device_type |= DT_ISP2322;
                ha->device_type |= DT_ZIO_SUPPORTED;
                if (ha->pdev->subsystem_vendor == 0x1028 &&
                    ha->pdev->subsystem_device == 0x0170)
                        ha->device_type |= DT_OEM_001;
                ha->fw_srisc_address = RISC_START_ADDRESS_2300;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP6312:
                ha->device_type |= DT_ISP6312;
                ha->fw_srisc_address = RISC_START_ADDRESS_2300;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP6322:
                ha->device_type |= DT_ISP6322;
                ha->fw_srisc_address = RISC_START_ADDRESS_2300;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2422:
                ha->device_type |= DT_ISP2422;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->device_type |= DT_IIDMA;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2432:
                ha->device_type |= DT_ISP2432;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->device_type |= DT_IIDMA;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP8432:
                ha->device_type |= DT_ISP8432;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->device_type |= DT_IIDMA;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP5422:
                ha->device_type |= DT_ISP5422;
                ha->device_type |= DT_FWI2;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP5432:
                ha->device_type |= DT_ISP5432;
                ha->device_type |= DT_FWI2;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2532:
                ha->device_type |= DT_ISP2532;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->device_type |= DT_IIDMA;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP8001:
                ha->device_type |= DT_ISP8001;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->device_type |= DT_IIDMA;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP8021:
                ha->device_type |= DT_ISP8021;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                /* Initialize 82XX ISP flags */
                qla82xx_init_flags(ha);
                break;
         case PCI_DEVICE_ID_QLOGIC_ISP8044:
                ha->device_type |= DT_ISP8044;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                /* Initialize 82XX ISP flags */
                qla82xx_init_flags(ha);
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP2031:
                ha->device_type |= DT_ISP2031;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->device_type |= DT_IIDMA;
                ha->device_type |= DT_T10_PI;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISP8031:
                ha->device_type |= DT_ISP8031;
                ha->device_type |= DT_ZIO_SUPPORTED;
                ha->device_type |= DT_FWI2;
                ha->device_type |= DT_IIDMA;
                ha->device_type |= DT_T10_PI;
                ha->fw_srisc_address = RISC_START_ADDRESS_2400;
                break;
        case PCI_DEVICE_ID_QLOGIC_ISPF001:
                ha->device_type |= DT_ISPFX00;
                break;
        }

        if (IS_QLA82XX(ha))
                ha->port_no = !(ha->portnum & 1);
        else
                /* Get adapter physical port no from interrupt pin register. */
                pci_read_config_byte(ha->pdev, PCI_INTERRUPT_PIN, &ha->port_no);

        if (ha->port_no & 1)
                ha->flags.port0 = 1;
        else
                ha->flags.port0 = 0;
        ql_dbg_pci(ql_dbg_init, ha->pdev, 0x000b,
            "device_type=0x%x port=%d fw_srisc_address=0x%x.\n",
            ha->device_type, ha->flags.port0, ha->fw_srisc_address);
}

static void
qla2xxx_scan_start(struct Scsi_Host *shost)
{
        scsi_qla_host_t *vha = shost_priv(shost);

        if (vha->hw->flags.running_gold_fw)
                return;

        set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
        set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
        set_bit(RSCN_UPDATE, &vha->dpc_flags);
        set_bit(NPIV_CONFIG_NEEDED, &vha->dpc_flags);
}

static int
qla2xxx_scan_finished(struct Scsi_Host *shost, unsigned long time)
{
        scsi_qla_host_t *vha = shost_priv(shost);

        if (!vha->host)
                return 1;
        if (time > vha->hw->loop_reset_delay * HZ)
                return 1;

        return atomic_read(&vha->loop_state) == LOOP_READY;
}

/*
 * PCI driver interface
 */
static int
qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
        int     ret = -ENODEV;
        struct Scsi_Host *host;
        scsi_qla_host_t *base_vha = NULL;
        struct qla_hw_data *ha;
        char pci_info[30];
        char fw_str[30], wq_name[30];
        struct scsi_host_template *sht;
        int bars, mem_only = 0;
        uint16_t req_length = 0, rsp_length = 0;
        struct req_que *req = NULL;
        struct rsp_que *rsp = NULL;
        bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
        sht = &qla2xxx_driver_template;
        if (pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2422 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2432 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP8432 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP5422 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP5432 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2532 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP8001 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP8021 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2031 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP8031 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISPF001 ||
            pdev->device == PCI_DEVICE_ID_QLOGIC_ISP8044) {
                bars = pci_select_bars(pdev, IORESOURCE_MEM);
                mem_only = 1;
                ql_dbg_pci(ql_dbg_init, pdev, 0x0007,
                    "Mem only adapter.\n");
        }
        ql_dbg_pci(ql_dbg_init, pdev, 0x0008,
            "Bars=%d.\n", bars);

        if (mem_only) {
                if (pci_enable_device_mem(pdev))
                        goto probe_out;
        } else {
                if (pci_enable_device(pdev))
                        goto probe_out;
        }

        /* This may fail but that's ok */
        pci_enable_pcie_error_reporting(pdev);

        ha = kzalloc(sizeof(struct qla_hw_data), GFP_KERNEL);
        if (!ha) {
                ql_log_pci(ql_log_fatal, pdev, 0x0009,
                    "Unable to allocate memory for ha.\n");
                goto probe_out;
        }
        ql_dbg_pci(ql_dbg_init, pdev, 0x000a,
            "Memory allocated for ha=%p.\n", ha);
        ha->pdev = pdev;
        ha->tgt.enable_class_2 = ql2xenableclass2;

        /* Clear our data area */
        ha->bars = bars;
        ha->mem_only = mem_only;
        spin_lock_init(&ha->hardware_lock);
        spin_lock_init(&ha->vport_slock);
        mutex_init(&ha->selflogin_lock);

        /* Set ISP-type information. */
        qla2x00_set_isp_flags(ha);

        /* Set EEH reset type to fundamental if required by hba */
        if (IS_QLA24XX(ha) || IS_QLA25XX(ha) || IS_QLA81XX(ha) ||
            IS_QLA83XX(ha))
                pdev->needs_freset = 1;

        ha->prev_topology = 0;
        ha->init_cb_size = sizeof(init_cb_t);
        ha->link_data_rate = PORT_SPEED_UNKNOWN;
        ha->optrom_size = OPTROM_SIZE_2300;
        ha->cfg_lun_q_depth = ql2xmaxqdepth;

        /* Assign ISP specific operations. */
        if (IS_QLA2100(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2100;
                ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
                req_length = REQUEST_ENTRY_CNT_2100;
                rsp_length = RESPONSE_ENTRY_CNT_2100;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2100;
                ha->gid_list_info_size = 4;
                ha->flash_conf_off = ~0;
                ha->flash_data_off = ~0;
                ha->nvram_conf_off = ~0;
                ha->nvram_data_off = ~0;
                ha->isp_ops = &qla2100_isp_ops;
        } else if (IS_QLA2200(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2100;
                ha->mbx_count = MAILBOX_REGISTER_COUNT_2200;
                req_length = REQUEST_ENTRY_CNT_2200;
                rsp_length = RESPONSE_ENTRY_CNT_2100;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2100;
                ha->gid_list_info_size = 4;
                ha->flash_conf_off = ~0;
                ha->flash_data_off = ~0;
                ha->nvram_conf_off = ~0;
                ha->nvram_data_off = ~0;
                ha->isp_ops = &qla2100_isp_ops;
        } else if (IS_QLA23XX(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2100;
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_2200;
                rsp_length = RESPONSE_ENTRY_CNT_2300;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->gid_list_info_size = 6;
                if (IS_QLA2322(ha) || IS_QLA6322(ha))
                        ha->optrom_size = OPTROM_SIZE_2322;
                ha->flash_conf_off = ~0;
                ha->flash_data_off = ~0;
                ha->nvram_conf_off = ~0;
                ha->nvram_data_off = ~0;
                ha->isp_ops = &qla2300_isp_ops;
        } else if (IS_QLA24XX_TYPE(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2400;
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_24XX;
                rsp_length = RESPONSE_ENTRY_CNT_2300;
                ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_24xx);
                ha->gid_list_info_size = 8;
                ha->optrom_size = OPTROM_SIZE_24XX;
                ha->nvram_npiv_size = QLA_MAX_VPORTS_QLA24XX;
                ha->isp_ops = &qla24xx_isp_ops;
                ha->flash_conf_off = FARX_ACCESS_FLASH_CONF;
                ha->flash_data_off = FARX_ACCESS_FLASH_DATA;
                ha->nvram_conf_off = FARX_ACCESS_NVRAM_CONF;
                ha->nvram_data_off = FARX_ACCESS_NVRAM_DATA;
        } else if (IS_QLA25XX(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2400;
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_24XX;
                rsp_length = RESPONSE_ENTRY_CNT_2300;
                ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_24xx);
                ha->gid_list_info_size = 8;
                ha->optrom_size = OPTROM_SIZE_25XX;
                ha->nvram_npiv_size = QLA_MAX_VPORTS_QLA25XX;
                ha->isp_ops = &qla25xx_isp_ops;
                ha->flash_conf_off = FARX_ACCESS_FLASH_CONF;
                ha->flash_data_off = FARX_ACCESS_FLASH_DATA;
                ha->nvram_conf_off = FARX_ACCESS_NVRAM_CONF;
                ha->nvram_data_off = FARX_ACCESS_NVRAM_DATA;
        } else if (IS_QLA81XX(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2400;
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_24XX;
                rsp_length = RESPONSE_ENTRY_CNT_2300;
                ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_81xx);
                ha->gid_list_info_size = 8;
                ha->optrom_size = OPTROM_SIZE_81XX;
                ha->nvram_npiv_size = QLA_MAX_VPORTS_QLA25XX;
                ha->isp_ops = &qla81xx_isp_ops;
                ha->flash_conf_off = FARX_ACCESS_FLASH_CONF_81XX;
                ha->flash_data_off = FARX_ACCESS_FLASH_DATA_81XX;
                ha->nvram_conf_off = ~0;
                ha->nvram_data_off = ~0;
        } else if (IS_QLA82XX(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2400;
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_82XX;
                rsp_length = RESPONSE_ENTRY_CNT_82XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_81xx);
                ha->gid_list_info_size = 8;
                ha->optrom_size = OPTROM_SIZE_82XX;
                ha->nvram_npiv_size = QLA_MAX_VPORTS_QLA25XX;
                ha->isp_ops = &qla82xx_isp_ops;
                ha->flash_conf_off = FARX_ACCESS_FLASH_CONF;
                ha->flash_data_off = FARX_ACCESS_FLASH_DATA;
                ha->nvram_conf_off = FARX_ACCESS_NVRAM_CONF;
                ha->nvram_data_off = FARX_ACCESS_NVRAM_DATA;
        } else if (IS_QLA8044(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2400;
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_82XX;
                rsp_length = RESPONSE_ENTRY_CNT_82XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_81xx);
                ha->gid_list_info_size = 8;
                ha->optrom_size = OPTROM_SIZE_83XX;
                ha->nvram_npiv_size = QLA_MAX_VPORTS_QLA25XX;
                ha->isp_ops = &qla8044_isp_ops;
                ha->flash_conf_off = FARX_ACCESS_FLASH_CONF;
                ha->flash_data_off = FARX_ACCESS_FLASH_DATA;
                ha->nvram_conf_off = FARX_ACCESS_NVRAM_CONF;
                ha->nvram_data_off = FARX_ACCESS_NVRAM_DATA;
        } else if (IS_QLA83XX(ha)) {
                ha->portnum = PCI_FUNC(ha->pdev->devfn);
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_2400;
                ha->mbx_count = MAILBOX_REGISTER_COUNT;
                req_length = REQUEST_ENTRY_CNT_24XX;
                rsp_length = RESPONSE_ENTRY_CNT_2300;
                ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
                ha->max_loop_id = SNS_LAST_LOOP_ID_2300;
                ha->init_cb_size = sizeof(struct mid_init_cb_81xx);
                ha->gid_list_info_size = 8;
                ha->optrom_size = OPTROM_SIZE_83XX;
                ha->nvram_npiv_size = QLA_MAX_VPORTS_QLA25XX;
                ha->isp_ops = &qla83xx_isp_ops;
                ha->flash_conf_off = FARX_ACCESS_FLASH_CONF_81XX;
                ha->flash_data_off = FARX_ACCESS_FLASH_DATA_81XX;
                ha->nvram_conf_off = ~0;
                ha->nvram_data_off = ~0;
        }  else if (IS_QLAFX00(ha)) {
                ha->max_fibre_devices = MAX_FIBRE_DEVICES_FX00;
                ha->mbx_count = MAILBOX_REGISTER_COUNT_FX00;
                ha->aen_mbx_count = AEN_MAILBOX_REGISTER_COUNT_FX00;
                req_length = REQUEST_ENTRY_CNT_FX00;
                rsp_length = RESPONSE_ENTRY_CNT_FX00;
                ha->init_cb_size = sizeof(struct init_cb_fx);
                ha->isp_ops = &qlafx00_isp_ops;
                ha->port_down_retry_count = 30; /* default value */
                ha->mr.fw_hbt_cnt = QLAFX00_HEARTBEAT_INTERVAL;
                ha->mr.fw_reset_timer_tick = QLAFX00_RESET_INTERVAL;
                ha->mr.fw_critemp_timer_tick = QLAFX00_CRITEMP_INTERVAL;
                ha->mr.fw_hbt_en = 1;
        }

        ql_dbg_pci(ql_dbg_init, pdev, 0x001e,
            "mbx_count=%d, req_length=%d, "
            "rsp_length=%d, max_loop_id=%d, init_cb_size=%d, "
            "gid_list_info_size=%d, optrom_size=%d, nvram_npiv_size=%d, "
            "max_fibre_devices=%d.\n",
            ha->mbx_count, req_length, rsp_length, ha->max_loop_id,
            ha->init_cb_size, ha->gid_list_info_size, ha->optrom_size,
            ha->nvram_npiv_size, ha->max_fibre_devices);
        ql_dbg_pci(ql_dbg_init, pdev, 0x001f,
            "isp_ops=%p, flash_conf_off=%d, "
            "flash_data_off=%d, nvram_conf_off=%d, nvram_data_off=%d.\n",
            ha->isp_ops, ha->flash_conf_off, ha->flash_data_off,
            ha->nvram_conf_off, ha->nvram_data_off);

        /* Configure PCI I/O space */
        ret = ha->isp_ops->iospace_config(ha);
        if (ret)
                goto iospace_config_failed;

        ql_log_pci(ql_log_info, pdev, 0x001d,
            "Found an ISP%04X irq %d iobase 0x%p.\n",
            pdev->device, pdev->irq, ha->iobase);
        mutex_init(&ha->vport_lock);
        init_completion(&ha->mbx_cmd_comp);
        complete(&ha->mbx_cmd_comp);
        init_completion(&ha->mbx_intr_comp);
        init_completion(&ha->dcbx_comp);
        init_completion(&ha->lb_portup_comp);

        set_bit(0, (unsigned long *) ha->vp_idx_map);

        qla2x00_config_dma_addressing(ha);
        ql_dbg_pci(ql_dbg_init, pdev, 0x0020,
            "64 Bit addressing is %s.\n",
            ha->flags.enable_64bit_addressing ? "enable" :
            "disable");
        ret = qla2x00_mem_alloc(ha, req_length, rsp_length, &req, &rsp);
        if (!ret) {
                ql_log_pci(ql_log_fatal, pdev, 0x0031,
                    "Failed to allocate memory for adapter, aborting.\n");

                goto probe_hw_failed;
        }

        req->max_q_depth = MAX_Q_DEPTH;
        if (ql2xmaxqdepth != 0 && ql2xmaxqdepth <= 0xffffU)
                req->max_q_depth = ql2xmaxqdepth;


        base_vha = qla2x00_create_host(sht, ha);
        if (!base_vha) {
                ret = -ENOMEM;
                qla2x00_mem_free(ha);
                qla2x00_free_req_que(ha, req);
                qla2x00_free_rsp_que(ha, rsp);
                goto probe_hw_failed;
        }

        pci_set_drvdata(pdev, base_vha);

        host = base_vha->host;
        base_vha->req = req;
        if (IS_QLAFX00(ha))
                host->can_queue = 1024;
        else
                host->can_queue = req->length + 128;
        if (IS_QLA2XXX_MIDTYPE(ha))
                base_vha->mgmt_svr_loop_id = 10 + base_vha->vp_idx;
        else
                base_vha->mgmt_svr_loop_id = MANAGEMENT_SERVER +
                                                base_vha->vp_idx;

        /* Setup fcport template structure. */
        ha->mr.fcport.vha = base_vha;
        ha->mr.fcport.port_type = FCT_UNKNOWN;
        ha->mr.fcport.loop_id = FC_NO_LOOP_ID;
        qla2x00_set_fcport_state(&ha->mr.fcport, FCS_UNCONFIGURED);
        ha->mr.fcport.supported_classes = FC_COS_UNSPECIFIED;
        ha->mr.fcport.scan_state = 1;

        /* Set the SG table size based on ISP type */
        if (!IS_FWI2_CAPABLE(ha)) {
                if (IS_QLA2100(ha))
                        host->sg_tablesize = 32;
        } else {
                if (!IS_QLA82XX(ha))
                        host->sg_tablesize = QLA_SG_ALL;
        }
        ql_dbg(ql_dbg_init, base_vha, 0x0032,
            "can_queue=%d, req=%p, "
            "mgmt_svr_loop_id=%d, sg_tablesize=%d.\n",
            host->can_queue, base_vha->req,
            base_vha->mgmt_svr_loop_id, host->sg_tablesize);
        host->max_id = ha->max_fibre_devices;
        host->cmd_per_lun = 3;
        host->unique_id = host->host_no;
        if (IS_T10_PI_CAPABLE(ha) && ql2xenabledif)
                host->max_cmd_len = 32;
        else
                host->max_cmd_len = MAX_CMDSZ;
        host->max_channel = MAX_BUSES - 1;
        host->max_lun = ql2xmaxlun;
        host->transportt = qla2xxx_transport_template;
        sht->vendor_id = (SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_QLOGIC);

        ql_dbg(ql_dbg_init, base_vha, 0x0033,
            "max_id=%d this_id=%d "
            "cmd_per_len=%d unique_id=%d max_cmd_len=%d max_channel=%d "
            "max_lun=%d transportt=%p, vendor_id=%llu.\n", host->max_id,
            host->this_id, host->cmd_per_lun, host->unique_id,
            host->max_cmd_len, host->max_channel, host->max_lun,
            host->transportt, sht->vendor_id);

que_init:
        /* Alloc arrays of request and response ring ptrs */
        if (!qla2x00_alloc_queues(ha, req, rsp)) {
                ql_log(ql_log_fatal, base_vha, 0x003d,
                    "Failed to allocate memory for queue pointers..."
                    "aborting.\n");
                goto probe_init_failed;
        }

        qlt_probe_one_stage1(base_vha, ha);

        /* Set up the irqs */
        ret = qla2x00_request_irqs(ha, rsp);
        if (ret)
                goto probe_init_failed;

        pci_save_state(pdev);

        /* Assign back pointers */
        rsp->req = req;
        req->rsp = rsp;

        if (IS_QLAFX00(ha)) {
                ha->rsp_q_map[0] = rsp;
                ha->req_q_map[0] = req;
                set_bit(0, ha->req_qid_map);
                set_bit(0, ha->rsp_qid_map);
        }

        /* FWI2-capable only. */
        req->req_q_in = &ha->iobase->isp24.req_q_in;
        req->req_q_out = &ha->iobase->isp24.req_q_out;
        rsp->rsp_q_in = &ha->iobase->isp24.rsp_q_in;
        rsp->rsp_q_out = &ha->iobase->isp24.rsp_q_out;
        if (ha->mqenable || IS_QLA83XX(ha)) {
                req->req_q_in = &ha->mqiobase->isp25mq.req_q_in;
                req->req_q_out = &ha->mqiobase->isp25mq.req_q_out;
                rsp->rsp_q_in = &ha->mqiobase->isp25mq.rsp_q_in;
                rsp->rsp_q_out =  &ha->mqiobase->isp25mq.rsp_q_out;
        }

        if (IS_QLAFX00(ha)) {
                req->req_q_in = &ha->iobase->ispfx00.req_q_in;
                req->req_q_out = &ha->iobase->ispfx00.req_q_out;
                rsp->rsp_q_in = &ha->iobase->ispfx00.rsp_q_in;
                rsp->rsp_q_out = &ha->iobase->ispfx00.rsp_q_out;
        }

        if (IS_P3P_TYPE(ha)) {
                req->req_q_out = &ha->iobase->isp82.req_q_out[0];
                rsp->rsp_q_in = &ha->iobase->isp82.rsp_q_in[0];
                rsp->rsp_q_out = &ha->iobase->isp82.rsp_q_out[0];
        }

        ql_dbg(ql_dbg_multiq, base_vha, 0xc009,
            "rsp_q_map=%p req_q_map=%p rsp->req=%p req->rsp=%p.\n",
            ha->rsp_q_map, ha->req_q_map, rsp->req, req->rsp);
        ql_dbg(ql_dbg_multiq, base_vha, 0xc00a,
            "req->req_q_in=%p req->req_q_out=%p "
            "rsp->rsp_q_in=%p rsp->rsp_q_out=%p.\n",
            req->req_q_in, req->req_q_out,
            rsp->rsp_q_in, rsp->rsp_q_out);
        ql_dbg(ql_dbg_init, base_vha, 0x003e,
            "rsp_q_map=%p req_q_map=%p rsp->req=%p req->rsp=%p.\n",
            ha->rsp_q_map, ha->req_q_map, rsp->req, req->rsp);
        ql_dbg(ql_dbg_init, base_vha, 0x003f,
            "req->req_q_in=%p req->req_q_out=%p rsp->rsp_q_in=%p rsp->rsp_q_out=%p.\n",
            req->req_q_in, req->req_q_out, rsp->rsp_q_in, rsp->rsp_q_out);

        if (ha->isp_ops->initialize_adapter(base_vha)) {
                ql_log(ql_log_fatal, base_vha, 0x00d6,
                    "Failed to initialize adapter - Adapter flags %x.\n",
                    base_vha->device_flags);

                if (IS_QLA82XX(ha)) {
                        qla82xx_idc_lock(ha);
                        qla82xx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
                                QLA8XXX_DEV_FAILED);
                        qla82xx_idc_unlock(ha);
                        ql_log(ql_log_fatal, base_vha, 0x00d7,
                            "HW State: FAILED.\n");
                } else if (IS_QLA8044(ha)) {
                        qla8044_idc_lock(ha);
                        qla8044_wr_direct(base_vha,
                                QLA8044_CRB_DEV_STATE_INDEX,
                                QLA8XXX_DEV_FAILED);
                        qla8044_idc_unlock(ha);
                        ql_log(ql_log_fatal, base_vha, 0x0150,
                            "HW State: FAILED.\n");
                }

                ret = -ENODEV;
                goto probe_failed;
        }

        if (ha->mqenable) {
                if (qla25xx_setup_mode(base_vha)) {
                        ql_log(ql_log_warn, base_vha, 0x00ec,
                            "Failed to create queues, falling back to single queue mode.\n");
                        goto que_init;
                }
        }

        if (ha->flags.running_gold_fw)
                goto skip_dpc;

        /*
         * Startup the kernel thread for this host adapter
         */
        ha->dpc_thread = kthread_create(qla2x00_do_dpc, ha,
            "%s_dpc", base_vha->host_str);
        if (IS_ERR(ha->dpc_thread)) {
                ql_log(ql_log_fatal, base_vha, 0x00ed,
                    "Failed to start DPC thread.\n");
                ret = PTR_ERR(ha->dpc_thread);
                goto probe_failed;
        }
        ql_dbg(ql_dbg_init, base_vha, 0x00ee,
            "DPC thread started successfully.\n");

        /*
         * If we're not coming up in initiator mode, we might sit for
         * a while without waking up the dpc thread, which leads to a
         * stuck process warning.  So just kick the dpc once here and
         * let the kthread start (and go back to sleep in qla2x00_do_dpc).
         */
        qla2xxx_wake_dpc(base_vha);

        if (IS_QLA8031(ha) || IS_MCTP_CAPABLE(ha)) {
                sprintf(wq_name, "qla2xxx_%lu_dpc_lp_wq", base_vha->host_no);
                ha->dpc_lp_wq = create_singlethread_workqueue(wq_name);
                INIT_WORK(&ha->idc_aen, qla83xx_service_idc_aen);

                sprintf(wq_name, "qla2xxx_%lu_dpc_hp_wq", base_vha->host_no);
                ha->dpc_hp_wq = create_singlethread_workqueue(wq_name);
                INIT_WORK(&ha->nic_core_reset, qla83xx_nic_core_reset_work);
                INIT_WORK(&ha->idc_state_handler,
                    qla83xx_idc_state_handler_work);
                INIT_WORK(&ha->nic_core_unrecoverable,
                    qla83xx_nic_core_unrecoverable_work);
        }

skip_dpc:
        list_add_tail(&base_vha->list, &ha->vp_list);
        base_vha->host->irq = ha->pdev->irq;

        /* Initialized the timer */
        qla2x00_start_timer(base_vha, qla2x00_timer, WATCH_INTERVAL);
        ql_dbg(ql_dbg_init, base_vha, 0x00ef,
            "Started qla2x00_timer with "
            "interval=%d.\n", WATCH_INTERVAL);
        ql_dbg(ql_dbg_init, base_vha, 0x00f0,
            "Detected hba at address=%p.\n",
            ha);

        if (IS_T10_PI_CAPABLE(ha) && ql2xenabledif) {
                if (ha->fw_attributes & BIT_4) {
                        int prot = 0, guard;
                        base_vha->flags.difdix_supported = 1;
                        ql_dbg(ql_dbg_init, base_vha, 0x00f1,
                            "Registering for DIF/DIX type 1 and 3 protection.\n");
                        if (ql2xenabledif == 1)
                                prot = SHOST_DIX_TYPE0_PROTECTION;
                        scsi_host_set_prot(host,
                            prot | SHOST_DIF_TYPE1_PROTECTION
                            | SHOST_DIF_TYPE2_PROTECTION
                            | SHOST_DIF_TYPE3_PROTECTION
                            | SHOST_DIX_TYPE1_PROTECTION
                            | SHOST_DIX_TYPE2_PROTECTION
                            | SHOST_DIX_TYPE3_PROTECTION);

                        guard = SHOST_DIX_GUARD_CRC;

                        if (IS_PI_IPGUARD_CAPABLE(ha) &&
                            (ql2xenabledif > 1 || IS_PI_DIFB_DIX0_CAPABLE(ha)))
                                guard |= SHOST_DIX_GUARD_IP;

                        scsi_host_set_guard(host, guard);
                } else
                        base_vha->flags.difdix_supported = 0;
        }

        ha->isp_ops->enable_intrs(ha);

        if (IS_QLAFX00(ha)) {
                ret = qlafx00_fx_disc(base_vha,
                        &base_vha->hw->mr.fcport, FXDISC_GET_CONFIG_INFO);
                host->sg_tablesize = (ha->mr.extended_io_enabled) ?
                    QLA_SG_ALL : 128;
        }

        ret = scsi_add_host(host, &pdev->dev);
        if (ret)
                goto probe_failed;

        base_vha->flags.init_done = 1;
        base_vha->flags.online = 1;

        ql_dbg(ql_dbg_init, base_vha, 0x00f2,
            "Init done and hba is online.\n");

        if (qla_ini_mode_enabled(base_vha))
                scsi_scan_host(host);
        else
                ql_dbg(ql_dbg_init, base_vha, 0x0122,
                        "skipping scsi_scan_host() for non-initiator port\n");

        qla2x00_alloc_sysfs_attr(base_vha);

        if (IS_QLAFX00(ha)) {
                ret = qlafx00_fx_disc(base_vha,
                        &base_vha->hw->mr.fcport, FXDISC_GET_PORT_INFO);

                /* Register system information */
                ret =  qlafx00_fx_disc(base_vha,
                        &base_vha->hw->mr.fcport, FXDISC_REG_HOST_INFO);
        }

        qla2x00_init_host_attr(base_vha);

        qla2x00_dfs_setup(base_vha);

        ql_log(ql_log_info, base_vha, 0x00fb,
            "QLogic %s - %s.\n", ha->model_number, ha->model_desc);
        ql_log(ql_log_info, base_vha, 0x00fc,
            "ISP%04X: %s @ %s hdma%c host#=%ld fw=%s.\n",
            pdev->device, ha->isp_ops->pci_info_str(base_vha, pci_info),
            pci_name(pdev), ha->flags.enable_64bit_addressing ? '+' : '-',
            base_vha->host_no,
            ha->isp_ops->fw_version_str(base_vha, fw_str));

        qlt_add_target(ha, base_vha);

        return 0;

probe_init_failed:
        qla2x00_free_req_que(ha, req);
        ha->req_q_map[0] = NULL;
        clear_bit(0, ha->req_qid_map);
        qla2x00_free_rsp_que(ha, rsp);
        ha->rsp_q_map[0] = NULL;
        clear_bit(0, ha->rsp_qid_map);
        ha->max_req_queues = ha->max_rsp_queues = 0;

probe_failed:
        if (base_vha->timer_active)
                qla2x00_stop_timer(base_vha);
        base_vha->flags.online = 0;
        if (ha->dpc_thread) {
                struct task_struct *t = ha->dpc_thread;

                ha->dpc_thread = NULL;
                kthread_stop(t);
        }

        qla2x00_free_device(base_vha);

        scsi_host_put(base_vha->host);

probe_hw_failed:
        if (IS_QLA82XX(ha)) {
                qla82xx_idc_lock(ha);
                qla82xx_clear_drv_active(ha);
                qla82xx_idc_unlock(ha);
        }
        if (IS_QLA8044(ha)) {
                qla8044_idc_lock(ha);
                qla8044_clear_drv_active(base_vha);
                qla8044_idc_unlock(ha);
        }
iospace_config_failed:
        if (IS_P3P_TYPE(ha)) {
                if (!ha->nx_pcibase)
                        iounmap((device_reg_t __iomem *)ha->nx_pcibase);
                if (!ql2xdbwr)
                        iounmap((device_reg_t __iomem *)ha->nxdb_wr_ptr);
        } else {
                if (ha->iobase)
                        iounmap(ha->iobase);
                if (ha->cregbase)
                        iounmap(ha->cregbase);
        }
        pci_release_selected_regions(ha->pdev, ha->bars);
        kfree(ha);
        ha = NULL;

probe_out:
        pci_disable_device(pdev);
        return ret;
}

static void
qla2x00_stop_dpc_thread(scsi_qla_host_t *vha)
{
        struct qla_hw_data *ha = vha->hw;
        struct task_struct *t = ha->dpc_thread;

        if (ha->dpc_thread == NULL)
                return;
        /*
         * qla2xxx_wake_dpc checks for ->dpc_thread
         * so we need to zero it out.
         */
        ha->dpc_thread = NULL;
        kthread_stop(t);
}