Merge branch 'for-next' into for-linus

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / lpfc / lpfc_init.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2010 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/kthread.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/ctype.h>
#include <linux/aer.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>

#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#include "lpfc_version.h"

char *_dump_buf_data;
unsigned long _dump_buf_data_order;
char *_dump_buf_dif;
unsigned long _dump_buf_dif_order;
spinlock_t _dump_buf_lock;

static void lpfc_get_hba_model_desc(struct lpfc_hba *, uint8_t *, uint8_t *);
static int lpfc_post_rcv_buf(struct lpfc_hba *);
static int lpfc_sli4_queue_create(struct lpfc_hba *);
static void lpfc_sli4_queue_destroy(struct lpfc_hba *);
static int lpfc_create_bootstrap_mbox(struct lpfc_hba *);
static int lpfc_setup_endian_order(struct lpfc_hba *);
static int lpfc_sli4_read_config(struct lpfc_hba *);
static void lpfc_destroy_bootstrap_mbox(struct lpfc_hba *);
static void lpfc_free_sgl_list(struct lpfc_hba *);
static int lpfc_init_sgl_list(struct lpfc_hba *);
static int lpfc_init_active_sgl_array(struct lpfc_hba *);
static void lpfc_free_active_sgl(struct lpfc_hba *);
static int lpfc_hba_down_post_s3(struct lpfc_hba *phba);
static int lpfc_hba_down_post_s4(struct lpfc_hba *phba);
static int lpfc_sli4_cq_event_pool_create(struct lpfc_hba *);
static void lpfc_sli4_cq_event_pool_destroy(struct lpfc_hba *);
static void lpfc_sli4_cq_event_release_all(struct lpfc_hba *);

static struct scsi_transport_template *lpfc_transport_template = NULL;
static struct scsi_transport_template *lpfc_vport_transport_template = NULL;
static DEFINE_IDR(lpfc_hba_index);

/**
 * lpfc_config_port_prep - Perform lpfc initialization prior to config port
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine will do LPFC initialization prior to issuing the CONFIG_PORT
 * mailbox command. It retrieves the revision information from the HBA and
 * collects the Vital Product Data (VPD) about the HBA for preparing the
 * configuration of the HBA.
 *
 * Return codes:
 *   0 - success.
 *   -ERESTART - requests the SLI layer to reset the HBA and try again.
 *   Any other value - indicates an error.
 **/
int
lpfc_config_port_prep(struct lpfc_hba *phba)
{
        lpfc_vpd_t *vp = &phba->vpd;
        int i = 0, rc;
        LPFC_MBOXQ_t *pmb;
        MAILBOX_t *mb;
        char *lpfc_vpd_data = NULL;
        uint16_t offset = 0;
        static char licensed[56] =
                    "key unlock for use with gnu public licensed code only\0";
        static int init_key = 1;

        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                phba->link_state = LPFC_HBA_ERROR;
                return -ENOMEM;
        }

        mb = &pmb->u.mb;
        phba->link_state = LPFC_INIT_MBX_CMDS;

        if (lpfc_is_LC_HBA(phba->pcidev->device)) {
                if (init_key) {
                        uint32_t *ptext = (uint32_t *) licensed;

                        for (i = 0; i < 56; i += sizeof (uint32_t), ptext++)
                                *ptext = cpu_to_be32(*ptext);
                        init_key = 0;
                }

                lpfc_read_nv(phba, pmb);
                memset((char*)mb->un.varRDnvp.rsvd3, 0,
                        sizeof (mb->un.varRDnvp.rsvd3));
                memcpy((char*)mb->un.varRDnvp.rsvd3, licensed,
                         sizeof (licensed));

                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);

                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
                                        "0324 Config Port initialization "
                                        "error, mbxCmd x%x READ_NVPARM, "
                                        "mbxStatus x%x\n",
                                        mb->mbxCommand, mb->mbxStatus);
                        mempool_free(pmb, phba->mbox_mem_pool);
                        return -ERESTART;
                }
                memcpy(phba->wwnn, (char *)mb->un.varRDnvp.nodename,
                       sizeof(phba->wwnn));
                memcpy(phba->wwpn, (char *)mb->un.varRDnvp.portname,
                       sizeof(phba->wwpn));
        }

        phba->sli3_options = 0x0;

        /* Setup and issue mailbox READ REV command */
        lpfc_read_rev(phba, pmb);
        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
        if (rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0439 Adapter failed to init, mbxCmd x%x "
                                "READ_REV, mbxStatus x%x\n",
                                mb->mbxCommand, mb->mbxStatus);
                mempool_free( pmb, phba->mbox_mem_pool);
                return -ERESTART;
        }


        /*
         * The value of rr must be 1 since the driver set the cv field to 1.
         * This setting requires the FW to set all revision fields.
         */
        if (mb->un.varRdRev.rr == 0) {
                vp->rev.rBit = 0;
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0440 Adapter failed to init, READ_REV has "
                                "missing revision information.\n");
                mempool_free(pmb, phba->mbox_mem_pool);
                return -ERESTART;
        }

        if (phba->sli_rev == 3 && !mb->un.varRdRev.v3rsp) {
                mempool_free(pmb, phba->mbox_mem_pool);
                return -EINVAL;
        }

        /* Save information as VPD data */
        vp->rev.rBit = 1;
        memcpy(&vp->sli3Feat, &mb->un.varRdRev.sli3Feat, sizeof(uint32_t));
        vp->rev.sli1FwRev = mb->un.varRdRev.sli1FwRev;
        memcpy(vp->rev.sli1FwName, (char*) mb->un.varRdRev.sli1FwName, 16);
        vp->rev.sli2FwRev = mb->un.varRdRev.sli2FwRev;
        memcpy(vp->rev.sli2FwName, (char *) mb->un.varRdRev.sli2FwName, 16);
        vp->rev.biuRev = mb->un.varRdRev.biuRev;
        vp->rev.smRev = mb->un.varRdRev.smRev;
        vp->rev.smFwRev = mb->un.varRdRev.un.smFwRev;
        vp->rev.endecRev = mb->un.varRdRev.endecRev;
        vp->rev.fcphHigh = mb->un.varRdRev.fcphHigh;
        vp->rev.fcphLow = mb->un.varRdRev.fcphLow;
        vp->rev.feaLevelHigh = mb->un.varRdRev.feaLevelHigh;
        vp->rev.feaLevelLow = mb->un.varRdRev.feaLevelLow;
        vp->rev.postKernRev = mb->un.varRdRev.postKernRev;
        vp->rev.opFwRev = mb->un.varRdRev.opFwRev;

        /* If the sli feature level is less then 9, we must
         * tear down all RPIs and VPIs on link down if NPIV
         * is enabled.
         */
        if (vp->rev.feaLevelHigh < 9)
                phba->sli3_options |= LPFC_SLI3_VPORT_TEARDOWN;

        if (lpfc_is_LC_HBA(phba->pcidev->device))
                memcpy(phba->RandomData, (char *)&mb->un.varWords[24],
                                                sizeof (phba->RandomData));

        /* Get adapter VPD information */
        lpfc_vpd_data = kmalloc(DMP_VPD_SIZE, GFP_KERNEL);
        if (!lpfc_vpd_data)
                goto out_free_mbox;

        do {
                lpfc_dump_mem(phba, pmb, offset, DMP_REGION_VPD);
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);

                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                        "0441 VPD not present on adapter, "
                                        "mbxCmd x%x DUMP VPD, mbxStatus x%x\n",
                                        mb->mbxCommand, mb->mbxStatus);
                        mb->un.varDmp.word_cnt = 0;
                }
                /* dump mem may return a zero when finished or we got a
                 * mailbox error, either way we are done.
                 */
                if (mb->un.varDmp.word_cnt == 0)
                        break;
                if (mb->un.varDmp.word_cnt > DMP_VPD_SIZE - offset)
                        mb->un.varDmp.word_cnt = DMP_VPD_SIZE - offset;
                lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET,
                                      lpfc_vpd_data + offset,
                                      mb->un.varDmp.word_cnt);
                offset += mb->un.varDmp.word_cnt;
        } while (mb->un.varDmp.word_cnt && offset < DMP_VPD_SIZE);
        lpfc_parse_vpd(phba, lpfc_vpd_data, offset);

        kfree(lpfc_vpd_data);
out_free_mbox:
        mempool_free(pmb, phba->mbox_mem_pool);
        return 0;
}

/**
 * lpfc_config_async_cmpl - Completion handler for config async event mbox cmd
 * @phba: pointer to lpfc hba data structure.
 * @pmboxq: pointer to the driver internal queue element for mailbox command.
 *
 * This is the completion handler for driver's configuring asynchronous event
 * mailbox command to the device. If the mailbox command returns successfully,
 * it will set internal async event support flag to 1; otherwise, it will
 * set internal async event support flag to 0.
 **/
static void
lpfc_config_async_cmpl(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmboxq)
{
        if (pmboxq->u.mb.mbxStatus == MBX_SUCCESS)
                phba->temp_sensor_support = 1;
        else
                phba->temp_sensor_support = 0;
        mempool_free(pmboxq, phba->mbox_mem_pool);
        return;
}

/**
 * lpfc_dump_wakeup_param_cmpl - dump memory mailbox command completion handler
 * @phba: pointer to lpfc hba data structure.
 * @pmboxq: pointer to the driver internal queue element for mailbox command.
 *
 * This is the completion handler for dump mailbox command for getting
 * wake up parameters. When this command complete, the response contain
 * Option rom version of the HBA. This function translate the version number
 * into a human readable string and store it in OptionROMVersion.
 **/
static void
lpfc_dump_wakeup_param_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmboxq)
{
        struct prog_id *prg;
        uint32_t prog_id_word;
        char dist = ' ';
        /* character array used for decoding dist type. */
        char dist_char[] = "nabx";

        if (pmboxq->u.mb.mbxStatus != MBX_SUCCESS) {
                mempool_free(pmboxq, phba->mbox_mem_pool);
                return;
        }

        prg = (struct prog_id *) &prog_id_word;

        /* word 7 contain option rom version */
        prog_id_word = pmboxq->u.mb.un.varWords[7];

        /* Decode the Option rom version word to a readable string */
        if (prg->dist < 4)
                dist = dist_char[prg->dist];

        if ((prg->dist == 3) && (prg->num == 0))
                sprintf(phba->OptionROMVersion, "%d.%d%d",
                        prg->ver, prg->rev, prg->lev);
        else
                sprintf(phba->OptionROMVersion, "%d.%d%d%c%d",
                        prg->ver, prg->rev, prg->lev,
                        dist, prg->num);
        mempool_free(pmboxq, phba->mbox_mem_pool);
        return;
}

/**
 * lpfc_config_port_post - Perform lpfc initialization after config port
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine will do LPFC initialization after the CONFIG_PORT mailbox
 * command call. It performs all internal resource and state setups on the
 * port: post IOCB buffers, enable appropriate host interrupt attentions,
 * ELS ring timers, etc.
 *
 * Return codes
 *   0 - success.
 *   Any other value - error.
 **/
int
lpfc_config_port_post(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
        LPFC_MBOXQ_t *pmb;
        MAILBOX_t *mb;
        struct lpfc_dmabuf *mp;
        struct lpfc_sli *psli = &phba->sli;
        uint32_t status, timeout;
        int i, j;
        int rc;

        spin_lock_irq(&phba->hbalock);
        /*
         * If the Config port completed correctly the HBA is not
         * over heated any more.
         */
        if (phba->over_temp_state == HBA_OVER_TEMP)
                phba->over_temp_state = HBA_NORMAL_TEMP;
        spin_unlock_irq(&phba->hbalock);

        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                phba->link_state = LPFC_HBA_ERROR;
                return -ENOMEM;
        }
        mb = &pmb->u.mb;

        /* Get login parameters for NID.  */
        lpfc_read_sparam(phba, pmb, 0);
        pmb->vport = vport;
        if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0448 Adapter failed init, mbxCmd x%x "
                                "READ_SPARM mbxStatus x%x\n",
                                mb->mbxCommand, mb->mbxStatus);
                phba->link_state = LPFC_HBA_ERROR;
                mp = (struct lpfc_dmabuf *) pmb->context1;
                mempool_free( pmb, phba->mbox_mem_pool);
                lpfc_mbuf_free(phba, mp->virt, mp->phys);
                kfree(mp);
                return -EIO;
        }

        mp = (struct lpfc_dmabuf *) pmb->context1;

        memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
        lpfc_mbuf_free(phba, mp->virt, mp->phys);
        kfree(mp);
        pmb->context1 = NULL;

        if (phba->cfg_soft_wwnn)
                u64_to_wwn(phba->cfg_soft_wwnn,
                           vport->fc_sparam.nodeName.u.wwn);
        if (phba->cfg_soft_wwpn)
                u64_to_wwn(phba->cfg_soft_wwpn,
                           vport->fc_sparam.portName.u.wwn);
        memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
               sizeof (struct lpfc_name));
        memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
               sizeof (struct lpfc_name));

        /* Update the fc_host data structures with new wwn. */
        fc_host_node_name(shost) = wwn_to_u64(vport->fc_nodename.u.wwn);
        fc_host_port_name(shost) = wwn_to_u64(vport->fc_portname.u.wwn);
        fc_host_max_npiv_vports(shost) = phba->max_vpi;

        /* If no serial number in VPD data, use low 6 bytes of WWNN */
        /* This should be consolidated into parse_vpd ? - mr */
        if (phba->SerialNumber[0] == 0) {
                uint8_t *outptr;

                outptr = &vport->fc_nodename.u.s.IEEE[0];
                for (i = 0; i < 12; i++) {
                        status = *outptr++;
                        j = ((status & 0xf0) >> 4);
                        if (j <= 9)
                                phba->SerialNumber[i] =
                                    (char)((uint8_t) 0x30 + (uint8_t) j);
                        else
                                phba->SerialNumber[i] =
                                    (char)((uint8_t) 0x61 + (uint8_t) (j - 10));
                        i++;
                        j = (status & 0xf);
                        if (j <= 9)
                                phba->SerialNumber[i] =
                                    (char)((uint8_t) 0x30 + (uint8_t) j);
                        else
                                phba->SerialNumber[i] =
                                    (char)((uint8_t) 0x61 + (uint8_t) (j - 10));
                }
        }

        lpfc_read_config(phba, pmb);
        pmb->vport = vport;
        if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0453 Adapter failed to init, mbxCmd x%x "
                                "READ_CONFIG, mbxStatus x%x\n",
                                mb->mbxCommand, mb->mbxStatus);
                phba->link_state = LPFC_HBA_ERROR;
                mempool_free( pmb, phba->mbox_mem_pool);
                return -EIO;
        }

        /* Check if the port is disabled */
        lpfc_sli_read_link_ste(phba);

        /* Reset the DFT_HBA_Q_DEPTH to the max xri  */
        if (phba->cfg_hba_queue_depth > (mb->un.varRdConfig.max_xri+1))
                phba->cfg_hba_queue_depth =
                        (mb->un.varRdConfig.max_xri + 1) -
                                        lpfc_sli4_get_els_iocb_cnt(phba);

        phba->lmt = mb->un.varRdConfig.lmt;

        /* Get the default values for Model Name and Description */
        lpfc_get_hba_model_desc(phba, phba->ModelName, phba->ModelDesc);

        if ((phba->cfg_link_speed > LINK_SPEED_10G)
            || ((phba->cfg_link_speed == LINK_SPEED_1G)
                && !(phba->lmt & LMT_1Gb))
            || ((phba->cfg_link_speed == LINK_SPEED_2G)
                && !(phba->lmt & LMT_2Gb))
            || ((phba->cfg_link_speed == LINK_SPEED_4G)
                && !(phba->lmt & LMT_4Gb))
            || ((phba->cfg_link_speed == LINK_SPEED_8G)
                && !(phba->lmt & LMT_8Gb))
            || ((phba->cfg_link_speed == LINK_SPEED_10G)
                && !(phba->lmt & LMT_10Gb))) {
                /* Reset link speed to auto */
                lpfc_printf_log(phba, KERN_WARNING, LOG_LINK_EVENT,
                        "1302 Invalid speed for this board: "
                        "Reset link speed to auto: x%x\n",
                        phba->cfg_link_speed);
                        phba->cfg_link_speed = LINK_SPEED_AUTO;
        }

        phba->link_state = LPFC_LINK_DOWN;

        /* Only process IOCBs on ELS ring till hba_state is READY */
        if (psli->ring[psli->extra_ring].cmdringaddr)
                psli->ring[psli->extra_ring].flag |= LPFC_STOP_IOCB_EVENT;
        if (psli->ring[psli->fcp_ring].cmdringaddr)
                psli->ring[psli->fcp_ring].flag |= LPFC_STOP_IOCB_EVENT;
        if (psli->ring[psli->next_ring].cmdringaddr)
                psli->ring[psli->next_ring].flag |= LPFC_STOP_IOCB_EVENT;

        /* Post receive buffers for desired rings */
        if (phba->sli_rev != 3)
                lpfc_post_rcv_buf(phba);

        /*
         * Configure HBA MSI-X attention conditions to messages if MSI-X mode
         */
        if (phba->intr_type == MSIX) {
                rc = lpfc_config_msi(phba, pmb);
                if (rc) {
                        mempool_free(pmb, phba->mbox_mem_pool);
                        return -EIO;
                }
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
                                        "0352 Config MSI mailbox command "
                                        "failed, mbxCmd x%x, mbxStatus x%x\n",
                                        pmb->u.mb.mbxCommand,
                                        pmb->u.mb.mbxStatus);
                        mempool_free(pmb, phba->mbox_mem_pool);
                        return -EIO;
                }
        }

        spin_lock_irq(&phba->hbalock);
        /* Initialize ERATT handling flag */
        phba->hba_flag &= ~HBA_ERATT_HANDLED;

        /* Enable appropriate host interrupts */
        status = readl(phba->HCregaddr);
        status |= HC_MBINT_ENA | HC_ERINT_ENA | HC_LAINT_ENA;
        if (psli->num_rings > 0)
                status |= HC_R0INT_ENA;
        if (psli->num_rings > 1)
                status |= HC_R1INT_ENA;
        if (psli->num_rings > 2)
                status |= HC_R2INT_ENA;
        if (psli->num_rings > 3)
                status |= HC_R3INT_ENA;

        if ((phba->cfg_poll & ENABLE_FCP_RING_POLLING) &&
            (phba->cfg_poll & DISABLE_FCP_RING_INT))
                status &= ~(HC_R0INT_ENA);

        writel(status, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */
        spin_unlock_irq(&phba->hbalock);

        /* Set up ring-0 (ELS) timer */
        timeout = phba->fc_ratov * 2;
        mod_timer(&vport->els_tmofunc, jiffies + HZ * timeout);
        /* Set up heart beat (HB) timer */
        mod_timer(&phba->hb_tmofunc, jiffies + HZ * LPFC_HB_MBOX_INTERVAL);
        phba->hb_outstanding = 0;
        phba->last_completion_time = jiffies;
        /* Set up error attention (ERATT) polling timer */
        mod_timer(&phba->eratt_poll, jiffies + HZ * LPFC_ERATT_POLL_INTERVAL);

        if (phba->hba_flag & LINK_DISABLED) {
                lpfc_printf_log(phba,
                        KERN_ERR, LOG_INIT,
                        "2598 Adapter Link is disabled.\n");
                lpfc_down_link(phba, pmb);
                pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
                if ((rc != MBX_SUCCESS) && (rc != MBX_BUSY)) {
                        lpfc_printf_log(phba,
                        KERN_ERR, LOG_INIT,
                        "2599 Adapter failed to issue DOWN_LINK"
                        " mbox command rc 0x%x\n", rc);

                        mempool_free(pmb, phba->mbox_mem_pool);
                        return -EIO;
                }
        } else if (phba->cfg_suppress_link_up == 0) {
                lpfc_init_link(phba, pmb, phba->cfg_topology,
                        phba->cfg_link_speed);
                pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
                lpfc_set_loopback_flag(phba);
                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
                if (rc != MBX_SUCCESS) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0454 Adapter failed to init, mbxCmd x%x "
                                "INIT_LINK, mbxStatus x%x\n",
                                mb->mbxCommand, mb->mbxStatus);

                        /* Clear all interrupt enable conditions */
                        writel(0, phba->HCregaddr);
                        readl(phba->HCregaddr); /* flush */
                        /* Clear all pending interrupts */
                        writel(0xffffffff, phba->HAregaddr);
                        readl(phba->HAregaddr); /* flush */

                        phba->link_state = LPFC_HBA_ERROR;
                        if (rc != MBX_BUSY)
                                mempool_free(pmb, phba->mbox_mem_pool);
                        return -EIO;
                }
        }
        /* MBOX buffer will be freed in mbox compl */
        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        lpfc_config_async(phba, pmb, LPFC_ELS_RING);
        pmb->mbox_cmpl = lpfc_config_async_cmpl;
        pmb->vport = phba->pport;
        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);

        if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
                lpfc_printf_log(phba,
                                KERN_ERR,
                                LOG_INIT,
                                "0456 Adapter failed to issue "
                                "ASYNCEVT_ENABLE mbox status x%x\n",
                                rc);
                mempool_free(pmb, phba->mbox_mem_pool);
        }

        /* Get Option rom version */
        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        lpfc_dump_wakeup_param(phba, pmb);
        pmb->mbox_cmpl = lpfc_dump_wakeup_param_cmpl;
        pmb->vport = phba->pport;
        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);

        if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0435 Adapter failed "
                                "to get Option ROM version status x%x\n", rc);
                mempool_free(pmb, phba->mbox_mem_pool);
        }

        return 0;
}

/**
 * lpfc_hba_init_link - Initialize the FC link
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine will issue the INIT_LINK mailbox command call.
 * It is available to other drivers through the lpfc_hba data
 * structure for use as a delayed link up mechanism with the
 * module parameter lpfc_suppress_link_up.
 *
 * Return code
 *              0 - success
 *              Any other value - error
 **/
int
lpfc_hba_init_link(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;
        LPFC_MBOXQ_t *pmb;
        MAILBOX_t *mb;
        int rc;

        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                phba->link_state = LPFC_HBA_ERROR;
                return -ENOMEM;
        }
        mb = &pmb->u.mb;
        pmb->vport = vport;

        lpfc_init_link(phba, pmb, phba->cfg_topology,
                phba->cfg_link_speed);
        pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        lpfc_set_loopback_flag(phba);
        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
        if (rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0498 Adapter failed to init, mbxCmd x%x "
                        "INIT_LINK, mbxStatus x%x\n",
                        mb->mbxCommand, mb->mbxStatus);
                /* Clear all interrupt enable conditions */
                writel(0, phba->HCregaddr);
                readl(phba->HCregaddr); /* flush */
                /* Clear all pending interrupts */
                writel(0xffffffff, phba->HAregaddr);
                readl(phba->HAregaddr); /* flush */
                phba->link_state = LPFC_HBA_ERROR;
                if (rc != MBX_BUSY)
                        mempool_free(pmb, phba->mbox_mem_pool);
                return -EIO;
        }
        phba->cfg_suppress_link_up = 0;

        return 0;
}

/**
 * lpfc_hba_down_link - this routine downs the FC link
 *
 * This routine will issue the DOWN_LINK mailbox command call.
 * It is available to other drivers through the lpfc_hba data
 * structure for use to stop the link.
 *
 * Return code
 *              0 - success
 *              Any other value - error
 **/
int
lpfc_hba_down_link(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *pmb;
        int rc;

        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                phba->link_state = LPFC_HBA_ERROR;
                return -ENOMEM;
        }

        lpfc_printf_log(phba,
                KERN_ERR, LOG_INIT,
                "0491 Adapter Link is disabled.\n");
        lpfc_down_link(phba, pmb);
        pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
        if ((rc != MBX_SUCCESS) && (rc != MBX_BUSY)) {
                lpfc_printf_log(phba,
                KERN_ERR, LOG_INIT,
                "2522 Adapter failed to issue DOWN_LINK"
                " mbox command rc 0x%x\n", rc);

                mempool_free(pmb, phba->mbox_mem_pool);
                return -EIO;
        }
        return 0;
}

/**
 * lpfc_hba_down_prep - Perform lpfc uninitialization prior to HBA reset
 * @phba: pointer to lpfc HBA data structure.
 *
 * This routine will do LPFC uninitialization before the HBA is reset when
 * bringing down the SLI Layer.
 *
 * Return codes
 *   0 - success.
 *   Any other value - error.
 **/
int
lpfc_hba_down_prep(struct lpfc_hba *phba)
{
        struct lpfc_vport **vports;
        int i;

        if (phba->sli_rev <= LPFC_SLI_REV3) {
                /* Disable interrupts */
                writel(0, phba->HCregaddr);
                readl(phba->HCregaddr); /* flush */
        }

        if (phba->pport->load_flag & FC_UNLOADING)
                lpfc_cleanup_discovery_resources(phba->pport);
        else {
                vports = lpfc_create_vport_work_array(phba);
                if (vports != NULL)
                        for (i = 0; i <= phba->max_vports &&
                                vports[i] != NULL; i++)
                                lpfc_cleanup_discovery_resources(vports[i]);
                lpfc_destroy_vport_work_array(phba, vports);
        }
        return 0;
}

/**
 * lpfc_hba_down_post_s3 - Perform lpfc uninitialization after HBA reset
 * @phba: pointer to lpfc HBA data structure.
 *
 * This routine will do uninitialization after the HBA is reset when bring
 * down the SLI Layer.
 *
 * Return codes
 *   0 - success.
 *   Any other value - error.
 **/
static int
lpfc_hba_down_post_s3(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_sli_ring *pring;
        struct lpfc_dmabuf *mp, *next_mp;
        LIST_HEAD(completions);
        int i;

        if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)
                lpfc_sli_hbqbuf_free_all(phba);
        else {
                /* Cleanup preposted buffers on the ELS ring */
                pring = &psli->ring[LPFC_ELS_RING];
                list_for_each_entry_safe(mp, next_mp, &pring->postbufq, list) {
                        list_del(&mp->list);
                        pring->postbufq_cnt--;
                        lpfc_mbuf_free(phba, mp->virt, mp->phys);
                        kfree(mp);
                }
        }

        spin_lock_irq(&phba->hbalock);
        for (i = 0; i < psli->num_rings; i++) {
                pring = &psli->ring[i];

                /* At this point in time the HBA is either reset or DOA. Either
                 * way, nothing should be on txcmplq as it will NEVER complete.
                 */
                list_splice_init(&pring->txcmplq, &completions);
                pring->txcmplq_cnt = 0;
                spin_unlock_irq(&phba->hbalock);

                /* Cancel all the IOCBs from the completions list */
                lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
                                      IOERR_SLI_ABORTED);

                lpfc_sli_abort_iocb_ring(phba, pring);
                spin_lock_irq(&phba->hbalock);
        }
        spin_unlock_irq(&phba->hbalock);

        return 0;
}
/**
 * lpfc_hba_down_post_s4 - Perform lpfc uninitialization after HBA reset
 * @phba: pointer to lpfc HBA data structure.
 *
 * This routine will do uninitialization after the HBA is reset when bring
 * down the SLI Layer.
 *
 * Return codes
 *   0 - success.
 *   Any other value - error.
 **/
static int
lpfc_hba_down_post_s4(struct lpfc_hba *phba)
{
        struct lpfc_scsi_buf *psb, *psb_next;
        LIST_HEAD(aborts);
        int ret;
        unsigned long iflag = 0;
        ret = lpfc_hba_down_post_s3(phba);
        if (ret)
                return ret;
        /* At this point in time the HBA is either reset or DOA. Either
         * way, nothing should be on lpfc_abts_els_sgl_list, it needs to be
         * on the lpfc_sgl_list so that it can either be freed if the
         * driver is unloading or reposted if the driver is restarting
         * the port.
         */
        spin_lock_irq(&phba->hbalock);  /* required for lpfc_sgl_list and */
                                        /* scsl_buf_list */
        /* abts_sgl_list_lock required because worker thread uses this
         * list.
         */
        spin_lock(&phba->sli4_hba.abts_sgl_list_lock);
        list_splice_init(&phba->sli4_hba.lpfc_abts_els_sgl_list,
                        &phba->sli4_hba.lpfc_sgl_list);
        spin_unlock(&phba->sli4_hba.abts_sgl_list_lock);
        /* abts_scsi_buf_list_lock required because worker thread uses this
         * list.
         */
        spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
        list_splice_init(&phba->sli4_hba.lpfc_abts_scsi_buf_list,
                        &aborts);
        spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
        spin_unlock_irq(&phba->hbalock);

        list_for_each_entry_safe(psb, psb_next, &aborts, list) {
                psb->pCmd = NULL;
                psb->status = IOSTAT_SUCCESS;
        }
        spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
        list_splice(&aborts, &phba->lpfc_scsi_buf_list);
        spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
        return 0;
}

/**
 * lpfc_hba_down_post - Wrapper func for hba down post routine
 * @phba: pointer to lpfc HBA data structure.
 *
 * This routine wraps the actual SLI3 or SLI4 routine for performing
 * uninitialization after the HBA is reset when bring down the SLI Layer.
 *
 * Return codes
 *   0 - success.
 *   Any other value - error.
 **/
int
lpfc_hba_down_post(struct lpfc_hba *phba)
{
        return (*phba->lpfc_hba_down_post)(phba);
}

/**
 * lpfc_hb_timeout - The HBA-timer timeout handler
 * @ptr: unsigned long holds the pointer to lpfc hba data structure.
 *
 * This is the HBA-timer timeout handler registered to the lpfc driver. When
 * this timer fires, a HBA timeout event shall be posted to the lpfc driver
 * work-port-events bitmap and the worker thread is notified. This timeout
 * event will be used by the worker thread to invoke the actual timeout
 * handler routine, lpfc_hb_timeout_handler. Any periodical operations will
 * be performed in the timeout handler and the HBA timeout event bit shall
 * be cleared by the worker thread after it has taken the event bitmap out.
 **/
static void
lpfc_hb_timeout(unsigned long ptr)
{
        struct lpfc_hba *phba;
        uint32_t tmo_posted;
        unsigned long iflag;

        phba = (struct lpfc_hba *)ptr;

        /* Check for heart beat timeout conditions */
        spin_lock_irqsave(&phba->pport->work_port_lock, iflag);
        tmo_posted = phba->pport->work_port_events & WORKER_HB_TMO;
        if (!tmo_posted)
                phba->pport->work_port_events |= WORKER_HB_TMO;
        spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag);

        /* Tell the worker thread there is work to do */
        if (!tmo_posted)
                lpfc_worker_wake_up(phba);
        return;
}

/**
 * lpfc_hb_mbox_cmpl - The lpfc heart-beat mailbox command callback function
 * @phba: pointer to lpfc hba data structure.
 * @pmboxq: pointer to the driver internal queue element for mailbox command.
 *
 * This is the callback function to the lpfc heart-beat mailbox command.
 * If configured, the lpfc driver issues the heart-beat mailbox command to
 * the HBA every LPFC_HB_MBOX_INTERVAL (current 5) seconds. At the time the
 * heart-beat mailbox command is issued, the driver shall set up heart-beat
 * timeout timer to LPFC_HB_MBOX_TIMEOUT (current 30) seconds and marks
 * heart-beat outstanding state. Once the mailbox command comes back and
 * no error conditions detected, the heart-beat mailbox command timer is
 * reset to LPFC_HB_MBOX_INTERVAL seconds and the heart-beat outstanding
 * state is cleared for the next heart-beat. If the timer expired with the
 * heart-beat outstanding state set, the driver will put the HBA offline.
 **/
static void
lpfc_hb_mbox_cmpl(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmboxq)
{
        unsigned long drvr_flag;

        spin_lock_irqsave(&phba->hbalock, drvr_flag);
        phba->hb_outstanding = 0;
        spin_unlock_irqrestore(&phba->hbalock, drvr_flag);

        /* Check and reset heart-beat timer is necessary */
        mempool_free(pmboxq, phba->mbox_mem_pool);
        if (!(phba->pport->fc_flag & FC_OFFLINE_MODE) &&
                !(phba->link_state == LPFC_HBA_ERROR) &&
                !(phba->pport->load_flag & FC_UNLOADING))
                mod_timer(&phba->hb_tmofunc,
                        jiffies + HZ * LPFC_HB_MBOX_INTERVAL);
        return;
}

/**
 * lpfc_hb_timeout_handler - The HBA-timer timeout handler
 * @phba: pointer to lpfc hba data structure.
 *
 * This is the actual HBA-timer timeout handler to be invoked by the worker
 * thread whenever the HBA timer fired and HBA-timeout event posted. This
 * handler performs any periodic operations needed for the device. If such
 * periodic event has already been attended to either in the interrupt handler
 * or by processing slow-ring or fast-ring events within the HBA-timer
 * timeout window (LPFC_HB_MBOX_INTERVAL), this handler just simply resets
 * the timer for the next timeout period. If lpfc heart-beat mailbox command
 * is configured and there is no heart-beat mailbox command outstanding, a
 * heart-beat mailbox is issued and timer set properly. Otherwise, if there
 * has been a heart-beat mailbox command outstanding, the HBA shall be put
 * to offline.
 **/
void
lpfc_hb_timeout_handler(struct lpfc_hba *phba)
{
        struct lpfc_vport **vports;
        LPFC_MBOXQ_t *pmboxq;
        struct lpfc_dmabuf *buf_ptr;
        int retval, i;
        struct lpfc_sli *psli = &phba->sli;
        LIST_HEAD(completions);

        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
                        lpfc_rcv_seq_check_edtov(vports[i]);
        lpfc_destroy_vport_work_array(phba, vports);

        if ((phba->link_state == LPFC_HBA_ERROR) ||
                (phba->pport->load_flag & FC_UNLOADING) ||
                (phba->pport->fc_flag & FC_OFFLINE_MODE))
                return;

        spin_lock_irq(&phba->pport->work_port_lock);

        if (time_after(phba->last_completion_time + LPFC_HB_MBOX_INTERVAL * HZ,
                jiffies)) {
                spin_unlock_irq(&phba->pport->work_port_lock);
                if (!phba->hb_outstanding)
                        mod_timer(&phba->hb_tmofunc,
                                jiffies + HZ * LPFC_HB_MBOX_INTERVAL);
                else
                        mod_timer(&phba->hb_tmofunc,
                                jiffies + HZ * LPFC_HB_MBOX_TIMEOUT);
                return;
        }
        spin_unlock_irq(&phba->pport->work_port_lock);

        if (phba->elsbuf_cnt &&
                (phba->elsbuf_cnt == phba->elsbuf_prev_cnt)) {
                spin_lock_irq(&phba->hbalock);
                list_splice_init(&phba->elsbuf, &completions);
                phba->elsbuf_cnt = 0;
                phba->elsbuf_prev_cnt = 0;
                spin_unlock_irq(&phba->hbalock);

                while (!list_empty(&completions)) {
                        list_remove_head(&completions, buf_ptr,
                                struct lpfc_dmabuf, list);
                        lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
                        kfree(buf_ptr);
                }
        }
        phba->elsbuf_prev_cnt = phba->elsbuf_cnt;

        /* If there is no heart beat outstanding, issue a heartbeat command */
        if (phba->cfg_enable_hba_heartbeat) {
                if (!phba->hb_outstanding) {
                        pmboxq = mempool_alloc(phba->mbox_mem_pool,GFP_KERNEL);
                        if (!pmboxq) {
                                mod_timer(&phba->hb_tmofunc,
                                          jiffies + HZ * LPFC_HB_MBOX_INTERVAL);
                                return;
                        }

                        lpfc_heart_beat(phba, pmboxq);
                        pmboxq->mbox_cmpl = lpfc_hb_mbox_cmpl;
                        pmboxq->vport = phba->pport;
                        retval = lpfc_sli_issue_mbox(phba, pmboxq, MBX_NOWAIT);

                        if (retval != MBX_BUSY && retval != MBX_SUCCESS) {
                                mempool_free(pmboxq, phba->mbox_mem_pool);
                                mod_timer(&phba->hb_tmofunc,
                                          jiffies + HZ * LPFC_HB_MBOX_INTERVAL);
                                return;
                        }
                        mod_timer(&phba->hb_tmofunc,
                                  jiffies + HZ * LPFC_HB_MBOX_TIMEOUT);
                        phba->hb_outstanding = 1;
                        return;
                } else {
                        /*
                        * If heart beat timeout called with hb_outstanding set
                        * we need to take the HBA offline.
                        */
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0459 Adapter heartbeat failure, "
                                        "taking this port offline.\n");

                        spin_lock_irq(&phba->hbalock);
                        psli->sli_flag &= ~LPFC_SLI_ACTIVE;
                        spin_unlock_irq(&phba->hbalock);

                        lpfc_offline_prep(phba);
                        lpfc_offline(phba);
                        lpfc_unblock_mgmt_io(phba);
                        phba->link_state = LPFC_HBA_ERROR;
                        lpfc_hba_down_post(phba);
                }
        }
}

/**
 * lpfc_offline_eratt - Bring lpfc offline on hardware error attention
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is called to bring the HBA offline when HBA hardware error
 * other than Port Error 6 has been detected.
 **/
static void
lpfc_offline_eratt(struct lpfc_hba *phba)
{
        struct lpfc_sli   *psli = &phba->sli;

        spin_lock_irq(&phba->hbalock);
        psli->sli_flag &= ~LPFC_SLI_ACTIVE;
        spin_unlock_irq(&phba->hbalock);
        lpfc_offline_prep(phba);

        lpfc_offline(phba);
        lpfc_reset_barrier(phba);
        spin_lock_irq(&phba->hbalock);
        lpfc_sli_brdreset(phba);
        spin_unlock_irq(&phba->hbalock);
        lpfc_hba_down_post(phba);
        lpfc_sli_brdready(phba, HS_MBRDY);
        lpfc_unblock_mgmt_io(phba);
        phba->link_state = LPFC_HBA_ERROR;
        return;
}

/**
 * lpfc_sli4_offline_eratt - Bring lpfc offline on SLI4 hardware error attention
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is called to bring a SLI4 HBA offline when HBA hardware error
 * other than Port Error 6 has been detected.
 **/
static void
lpfc_sli4_offline_eratt(struct lpfc_hba *phba)
{
        lpfc_offline_prep(phba);
        lpfc_offline(phba);
        lpfc_sli4_brdreset(phba);
        lpfc_hba_down_post(phba);
        lpfc_sli4_post_status_check(phba);
        lpfc_unblock_mgmt_io(phba);
        phba->link_state = LPFC_HBA_ERROR;
}

/**
 * lpfc_handle_deferred_eratt - The HBA hardware deferred error handler
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to handle the deferred HBA hardware error
 * conditions. This type of error is indicated by HBA by setting ER1
 * and another ER bit in the host status register. The driver will
 * wait until the ER1 bit clears before handling the error condition.
 **/
static void
lpfc_handle_deferred_eratt(struct lpfc_hba *phba)
{
        uint32_t old_host_status = phba->work_hs;
        struct lpfc_sli_ring  *pring;
        struct lpfc_sli *psli = &phba->sli;

        /* If the pci channel is offline, ignore possible errors,
         * since we cannot communicate with the pci card anyway.
         */
        if (pci_channel_offline(phba->pcidev)) {
                spin_lock_irq(&phba->hbalock);
                phba->hba_flag &= ~DEFER_ERATT;
                spin_unlock_irq(&phba->hbalock);
                return;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                "0479 Deferred Adapter Hardware Error "
                "Data: x%x x%x x%x\n",
                phba->work_hs,
                phba->work_status[0], phba->work_status[1]);

        spin_lock_irq(&phba->hbalock);
        psli->sli_flag &= ~LPFC_SLI_ACTIVE;
        spin_unlock_irq(&phba->hbalock);


        /*
         * Firmware stops when it triggred erratt. That could cause the I/Os
         * dropped by the firmware. Error iocb (I/O) on txcmplq and let the
         * SCSI layer retry it after re-establishing link.
         */
        pring = &psli->ring[psli->fcp_ring];
        lpfc_sli_abort_iocb_ring(phba, pring);

        /*
         * There was a firmware error. Take the hba offline and then
         * attempt to restart it.
         */
        lpfc_offline_prep(phba);
        lpfc_offline(phba);

        /* Wait for the ER1 bit to clear.*/
        while (phba->work_hs & HS_FFER1) {
                msleep(100);
                phba->work_hs = readl(phba->HSregaddr);
                /* If driver is unloading let the worker thread continue */
                if (phba->pport->load_flag & FC_UNLOADING) {
                        phba->work_hs = 0;
                        break;
                }
        }

        /*
         * This is to ptrotect against a race condition in which
         * first write to the host attention register clear the
         * host status register.
         */
        if ((!phba->work_hs) && (!(phba->pport->load_flag & FC_UNLOADING)))
                phba->work_hs = old_host_status & ~HS_FFER1;

        spin_lock_irq(&phba->hbalock);
        phba->hba_flag &= ~DEFER_ERATT;
        spin_unlock_irq(&phba->hbalock);
        phba->work_status[0] = readl(phba->MBslimaddr + 0xa8);
        phba->work_status[1] = readl(phba->MBslimaddr + 0xac);
}

static void
lpfc_board_errevt_to_mgmt(struct lpfc_hba *phba)
{
        struct lpfc_board_event_header board_event;
        struct Scsi_Host *shost;

        board_event.event_type = FC_REG_BOARD_EVENT;
        board_event.subcategory = LPFC_EVENT_PORTINTERR;
        shost = lpfc_shost_from_vport(phba->pport);
        fc_host_post_vendor_event(shost, fc_get_event_number(),
                                  sizeof(board_event),
                                  (char *) &board_event,
                                  LPFC_NL_VENDOR_ID);
}

/**
 * lpfc_handle_eratt_s3 - The SLI3 HBA hardware error handler
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to handle the following HBA hardware error
 * conditions:
 * 1 - HBA error attention interrupt
 * 2 - DMA ring index out of range
 * 3 - Mailbox command came back as unknown
 **/
static void
lpfc_handle_eratt_s3(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;
        struct lpfc_sli   *psli = &phba->sli;
        struct lpfc_sli_ring  *pring;
        uint32_t event_data;
        unsigned long temperature;
        struct temp_event temp_event_data;
        struct Scsi_Host  *shost;

        /* If the pci channel is offline, ignore possible errors,
         * since we cannot communicate with the pci card anyway.
         */
        if (pci_channel_offline(phba->pcidev)) {
                spin_lock_irq(&phba->hbalock);
                phba->hba_flag &= ~DEFER_ERATT;
                spin_unlock_irq(&phba->hbalock);
                return;
        }

        /* If resets are disabled then leave the HBA alone and return */
        if (!phba->cfg_enable_hba_reset)
                return;

        /* Send an internal error event to mgmt application */
        lpfc_board_errevt_to_mgmt(phba);

        if (phba->hba_flag & DEFER_ERATT)
                lpfc_handle_deferred_eratt(phba);

        if (phba->work_hs & HS_FFER6) {
                /* Re-establishing Link */
                lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
                                "1301 Re-establishing Link "
                                "Data: x%x x%x x%x\n",
                                phba->work_hs,
                                phba->work_status[0], phba->work_status[1]);

                spin_lock_irq(&phba->hbalock);
                psli->sli_flag &= ~LPFC_SLI_ACTIVE;
                spin_unlock_irq(&phba->hbalock);

                /*
                * Firmware stops when it triggled erratt with HS_FFER6.
                * That could cause the I/Os dropped by the firmware.
                * Error iocb (I/O) on txcmplq and let the SCSI layer
                * retry it after re-establishing link.
                */
                pring = &psli->ring[psli->fcp_ring];
                lpfc_sli_abort_iocb_ring(phba, pring);

                /*
                 * There was a firmware error.  Take the hba offline and then
                 * attempt to restart it.
                 */
                lpfc_offline_prep(phba);
                lpfc_offline(phba);
                lpfc_sli_brdrestart(phba);
                if (lpfc_online(phba) == 0) {   /* Initialize the HBA */
                        lpfc_unblock_mgmt_io(phba);
                        return;
                }
                lpfc_unblock_mgmt_io(phba);
        } else if (phba->work_hs & HS_CRIT_TEMP) {
                temperature = readl(phba->MBslimaddr + TEMPERATURE_OFFSET);
                temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT;
                temp_event_data.event_code = LPFC_CRIT_TEMP;
                temp_event_data.data = (uint32_t)temperature;

                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0406 Adapter maximum temperature exceeded "
                                "(%ld), taking this port offline "
                                "Data: x%x x%x x%x\n",
                                temperature, phba->work_hs,
                                phba->work_status[0], phba->work_status[1]);

                shost = lpfc_shost_from_vport(phba->pport);
                fc_host_post_vendor_event(shost, fc_get_event_number(),
                                          sizeof(temp_event_data),
                                          (char *) &temp_event_data,
                                          SCSI_NL_VID_TYPE_PCI
                                          | PCI_VENDOR_ID_EMULEX);

                spin_lock_irq(&phba->hbalock);
                phba->over_temp_state = HBA_OVER_TEMP;
                spin_unlock_irq(&phba->hbalock);
                lpfc_offline_eratt(phba);

        } else {
                /* The if clause above forces this code path when the status
                 * failure is a value other than FFER6. Do not call the offline
                 * twice. This is the adapter hardware error path.
                 */
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0457 Adapter Hardware Error "
                                "Data: x%x x%x x%x\n",
                                phba->work_hs,
                                phba->work_status[0], phba->work_status[1]);

                event_data = FC_REG_DUMP_EVENT;
                shost = lpfc_shost_from_vport(vport);
                fc_host_post_vendor_event(shost, fc_get_event_number(),
                                sizeof(event_data), (char *) &event_data,
                                SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX);

                lpfc_offline_eratt(phba);
        }
        return;
}

/**
 * lpfc_handle_eratt_s4 - The SLI4 HBA hardware error handler
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to handle the SLI4 HBA hardware error attention
 * conditions.
 **/
static void
lpfc_handle_eratt_s4(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;
        uint32_t event_data;
        struct Scsi_Host *shost;

        /* If the pci channel is offline, ignore possible errors, since
         * we cannot communicate with the pci card anyway.
         */
        if (pci_channel_offline(phba->pcidev))
                return;
        /* If resets are disabled then leave the HBA alone and return */
        if (!phba->cfg_enable_hba_reset)
                return;

        /* Send an internal error event to mgmt application */
        lpfc_board_errevt_to_mgmt(phba);

        /* For now, the actual action for SLI4 device handling is not
         * specified yet, just treated it as adaptor hardware failure
         */
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0143 SLI4 Adapter Hardware Error Data: x%x x%x\n",
                        phba->work_status[0], phba->work_status[1]);

        event_data = FC_REG_DUMP_EVENT;
        shost = lpfc_shost_from_vport(vport);
        fc_host_post_vendor_event(shost, fc_get_event_number(),
                                  sizeof(event_data), (char *) &event_data,
                                  SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX);

        lpfc_sli4_offline_eratt(phba);
}

/**
 * lpfc_handle_eratt - Wrapper func for handling hba error attention
 * @phba: pointer to lpfc HBA data structure.
 *
 * This routine wraps the actual SLI3 or SLI4 hba error attention handling
 * routine from the API jump table function pointer from the lpfc_hba struct.
 *
 * Return codes
 *   0 - success.
 *   Any other value - error.
 **/
void
lpfc_handle_eratt(struct lpfc_hba *phba)
{
        (*phba->lpfc_handle_eratt)(phba);
}

/**
 * lpfc_handle_latt - The HBA link event handler
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked from the worker thread to handle a HBA host
 * attention link event.
 **/
void
lpfc_handle_latt(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;
        struct lpfc_sli   *psli = &phba->sli;
        LPFC_MBOXQ_t *pmb;
        volatile uint32_t control;
        struct lpfc_dmabuf *mp;
        int rc = 0;

        pmb = (LPFC_MBOXQ_t *)mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                rc = 1;
                goto lpfc_handle_latt_err_exit;
        }

        mp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
        if (!mp) {
                rc = 2;
                goto lpfc_handle_latt_free_pmb;
        }

        mp->virt = lpfc_mbuf_alloc(phba, 0, &mp->phys);
        if (!mp->virt) {
                rc = 3;
                goto lpfc_handle_latt_free_mp;
        }

        /* Cleanup any outstanding ELS commands */
        lpfc_els_flush_all_cmd(phba);

        psli->slistat.link_event++;
        lpfc_read_la(phba, pmb, mp);
        pmb->mbox_cmpl = lpfc_mbx_cmpl_read_la;
        pmb->vport = vport;
        /* Block ELS IOCBs until we have processed this mbox command */
        phba->sli.ring[LPFC_ELS_RING].flag |= LPFC_STOP_IOCB_EVENT;
        rc = lpfc_sli_issue_mbox (phba, pmb, MBX_NOWAIT);
        if (rc == MBX_NOT_FINISHED) {
                rc = 4;
                goto lpfc_handle_latt_free_mbuf;
        }

        /* Clear Link Attention in HA REG */
        spin_lock_irq(&phba->hbalock);
        writel(HA_LATT, phba->HAregaddr);
        readl(phba->HAregaddr); /* flush */
        spin_unlock_irq(&phba->hbalock);

        return;

lpfc_handle_latt_free_mbuf:
        phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
        lpfc_mbuf_free(phba, mp->virt, mp->phys);
lpfc_handle_latt_free_mp:
        kfree(mp);
lpfc_handle_latt_free_pmb:
        mempool_free(pmb, phba->mbox_mem_pool);
lpfc_handle_latt_err_exit:
        /* Enable Link attention interrupts */
        spin_lock_irq(&phba->hbalock);
        psli->sli_flag |= LPFC_PROCESS_LA;
        control = readl(phba->HCregaddr);
        control |= HC_LAINT_ENA;
        writel(control, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */

        /* Clear Link Attention in HA REG */
        writel(HA_LATT, phba->HAregaddr);
        readl(phba->HAregaddr); /* flush */
        spin_unlock_irq(&phba->hbalock);
        lpfc_linkdown(phba);
        phba->link_state = LPFC_HBA_ERROR;

        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
                     "0300 LATT: Cannot issue READ_LA: Data:%d\n", rc);

        return;
}

/**
 * lpfc_parse_vpd - Parse VPD (Vital Product Data)
 * @phba: pointer to lpfc hba data structure.
 * @vpd: pointer to the vital product data.
 * @len: length of the vital product data in bytes.
 *
 * This routine parses the Vital Product Data (VPD). The VPD is treated as
 * an array of characters. In this routine, the ModelName, ProgramType, and
 * ModelDesc, etc. fields of the phba data structure will be populated.
 *
 * Return codes
 *   0 - pointer to the VPD passed in is NULL
 *   1 - success
 **/
int
lpfc_parse_vpd(struct lpfc_hba *phba, uint8_t *vpd, int len)
{
        uint8_t lenlo, lenhi;
        int Length;
        int i, j;
        int finished = 0;
        int index = 0;

        if (!vpd)
                return 0;

        /* Vital Product */
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0455 Vital Product Data: x%x x%x x%x x%x\n",
                        (uint32_t) vpd[0], (uint32_t) vpd[1], (uint32_t) vpd[2],
                        (uint32_t) vpd[3]);
        while (!finished && (index < (len - 4))) {
                switch (vpd[index]) {
                case 0x82:
                case 0x91:
                        index += 1;
                        lenlo = vpd[index];
                        index += 1;
                        lenhi = vpd[index];
                        index += 1;
                        i = ((((unsigned short)lenhi) << 8) + lenlo);
                        index += i;
                        break;
                case 0x90:
                        index += 1;
                        lenlo = vpd[index];
                        index += 1;
                        lenhi = vpd[index];
                        index += 1;
                        Length = ((((unsigned short)lenhi) << 8) + lenlo);
                        if (Length > len - index)
                                Length = len - index;
                        while (Length > 0) {
                        /* Look for Serial Number */
                        if ((vpd[index] == 'S') && (vpd[index+1] == 'N')) {
                                index += 2;
                                i = vpd[index];
                                index += 1;
                                j = 0;
                                Length -= (3+i);
                                while(i--) {
                                        phba->SerialNumber[j++] = vpd[index++];
                                        if (j == 31)
                                                break;
                                }
                                phba->SerialNumber[j] = 0;
                                continue;
                        }
                        else if ((vpd[index] == 'V') && (vpd[index+1] == '1')) {
                                phba->vpd_flag |= VPD_MODEL_DESC;
                                index += 2;
                                i = vpd[index];
                                index += 1;
                                j = 0;
                                Length -= (3+i);
                                while(i--) {
                                        phba->ModelDesc[j++] = vpd[index++];
                                        if (j == 255)
                                                break;
                                }
                                phba->ModelDesc[j] = 0;
                                continue;
                        }
                        else if ((vpd[index] == 'V') && (vpd[index+1] == '2')) {
                                phba->vpd_flag |= VPD_MODEL_NAME;
                                index += 2;
                                i = vpd[index];
                                index += 1;
                                j = 0;
                                Length -= (3+i);
                                while(i--) {
                                        phba->ModelName[j++] = vpd[index++];
                                        if (j == 79)
                                                break;
                                }
                                phba->ModelName[j] = 0;
                                continue;
                        }
                        else if ((vpd[index] == 'V') && (vpd[index+1] == '3')) {
                                phba->vpd_flag |= VPD_PROGRAM_TYPE;
                                index += 2;
                                i = vpd[index];
                                index += 1;
                                j = 0;
                                Length -= (3+i);
                                while(i--) {
                                        phba->ProgramType[j++] = vpd[index++];
                                        if (j == 255)
                                                break;
                                }
                                phba->ProgramType[j] = 0;
                                continue;
                        }
                        else if ((vpd[index] == 'V') && (vpd[index+1] == '4')) {
                                phba->vpd_flag |= VPD_PORT;
                                index += 2;
                                i = vpd[index];
                                index += 1;
                                j = 0;
                                Length -= (3+i);
                                while(i--) {
                                phba->Port[j++] = vpd[index++];
                                if (j == 19)
                                        break;
                                }
                                phba->Port[j] = 0;
                                continue;
                        }
                        else {
                                index += 2;
                                i = vpd[index];
                                index += 1;
                                index += i;
                                Length -= (3 + i);
                        }
                }
                finished = 0;
                break;
                case 0x78:
                        finished = 1;
                        break;
                default:
                        index ++;
                        break;
                }
        }

        return(1);
}

/**
 * lpfc_get_hba_model_desc - Retrieve HBA device model name and description
 * @phba: pointer to lpfc hba data structure.
 * @mdp: pointer to the data structure to hold the derived model name.
 * @descp: pointer to the data structure to hold the derived description.
 *
 * This routine retrieves HBA's description based on its registered PCI device
 * ID. The @descp passed into this function points to an array of 256 chars. It
 * shall be returned with the model name, maximum speed, and the host bus type.
 * The @mdp passed into this function points to an array of 80 chars. When the
 * function returns, the @mdp will be filled with the model name.
 **/
static void
lpfc_get_hba_model_desc(struct lpfc_hba *phba, uint8_t *mdp, uint8_t *descp)
{
        lpfc_vpd_t *vp;
        uint16_t dev_id = phba->pcidev->device;
        int max_speed;
        int GE = 0;
        int oneConnect = 0; /* default is not a oneConnect */
        struct {
                char *name;
                char *bus;
                char *function;
        } m = {"<Unknown>", "", ""};

        if (mdp && mdp[0] != '\0'
                && descp && descp[0] != '\0')
                return;

        if (phba->lmt & LMT_10Gb)
                max_speed = 10;
        else if (phba->lmt & LMT_8Gb)
                max_speed = 8;
        else if (phba->lmt & LMT_4Gb)
                max_speed = 4;
        else if (phba->lmt & LMT_2Gb)
                max_speed = 2;
        else
                max_speed = 1;

        vp = &phba->vpd;

        switch (dev_id) {
        case PCI_DEVICE_ID_FIREFLY:
                m = (typeof(m)){"LP6000", "PCI", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_SUPERFLY:
                if (vp->rev.biuRev >= 1 && vp->rev.biuRev <= 3)
                        m = (typeof(m)){"LP7000", "PCI",
                                        "Fibre Channel Adapter"};
                else
                        m = (typeof(m)){"LP7000E", "PCI",
                                        "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_DRAGONFLY:
                m = (typeof(m)){"LP8000", "PCI",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_CENTAUR:
                if (FC_JEDEC_ID(vp->rev.biuRev) == CENTAUR_2G_JEDEC_ID)
                        m = (typeof(m)){"LP9002", "PCI",
                                        "Fibre Channel Adapter"};
                else
                        m = (typeof(m)){"LP9000", "PCI",
                                        "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_RFLY:
                m = (typeof(m)){"LP952", "PCI",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_PEGASUS:
                m = (typeof(m)){"LP9802", "PCI-X",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_THOR:
                m = (typeof(m)){"LP10000", "PCI-X",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_VIPER:
                m = (typeof(m)){"LPX1000",  "PCI-X",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_PFLY:
                m = (typeof(m)){"LP982", "PCI-X",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_TFLY:
                m = (typeof(m)){"LP1050", "PCI-X",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_HELIOS:
                m = (typeof(m)){"LP11000", "PCI-X2",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_HELIOS_SCSP:
                m = (typeof(m)){"LP11000-SP", "PCI-X2",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_HELIOS_DCSP:
                m = (typeof(m)){"LP11002-SP",  "PCI-X2",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_NEPTUNE:
                m = (typeof(m)){"LPe1000", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_NEPTUNE_SCSP:
                m = (typeof(m)){"LPe1000-SP", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_NEPTUNE_DCSP:
                m = (typeof(m)){"LPe1002-SP", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_BMID:
                m = (typeof(m)){"LP1150", "PCI-X2", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_BSMB:
                m = (typeof(m)){"LP111", "PCI-X2", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_ZEPHYR:
                m = (typeof(m)){"LPe11000", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_ZEPHYR_SCSP:
                m = (typeof(m)){"LPe11000", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_ZEPHYR_DCSP:
                m = (typeof(m)){"LP2105", "PCIe", "FCoE Adapter"};
                GE = 1;
                break;
        case PCI_DEVICE_ID_ZMID:
                m = (typeof(m)){"LPe1150", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_ZSMB:
                m = (typeof(m)){"LPe111", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_LP101:
                m = (typeof(m)){"LP101", "PCI-X", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_LP10000S:
                m = (typeof(m)){"LP10000-S", "PCI", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_LP11000S:
                m = (typeof(m)){"LP11000-S", "PCI-X2", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_LPE11000S:
                m = (typeof(m)){"LPe11000-S", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_SAT:
                m = (typeof(m)){"LPe12000", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_SAT_MID:
                m = (typeof(m)){"LPe1250", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_SAT_SMB:
                m = (typeof(m)){"LPe121", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_SAT_DCSP:
                m = (typeof(m)){"LPe12002-SP", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_SAT_SCSP:
                m = (typeof(m)){"LPe12000-SP", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_SAT_S:
                m = (typeof(m)){"LPe12000-S", "PCIe", "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_HORNET:
                m = (typeof(m)){"LP21000", "PCIe", "FCoE Adapter"};
                GE = 1;
                break;
        case PCI_DEVICE_ID_PROTEUS_VF:
                m = (typeof(m)){"LPev12000", "PCIe IOV",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_PROTEUS_PF:
                m = (typeof(m)){"LPev12000", "PCIe IOV",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_PROTEUS_S:
                m = (typeof(m)){"LPemv12002-S", "PCIe IOV",
                                "Fibre Channel Adapter"};
                break;
        case PCI_DEVICE_ID_TIGERSHARK:
                oneConnect = 1;
                m = (typeof(m)){"OCe10100", "PCIe", "FCoE"};
                break;
        case PCI_DEVICE_ID_TOMCAT:
                oneConnect = 1;
                m = (typeof(m)){"OCe11100", "PCIe", "FCoE"};
                break;
        case PCI_DEVICE_ID_FALCON:
                m = (typeof(m)){"LPSe12002-ML1-E", "PCIe",
                                "EmulexSecure Fibre"};
                break;
        default:
                m = (typeof(m)){"Unknown", "", ""};
                break;
        }

        if (mdp && mdp[0] == '\0')
                snprintf(mdp, 79,"%s", m.name);
        /* oneConnect hba requires special processing, they are all initiators
         * and we put the port number on the end
         */
        if (descp && descp[0] == '\0') {
                if (oneConnect)
                        snprintf(descp, 255,
                                "Emulex OneConnect %s, %s Initiator, Port %s",
                                m.name, m.function,
                                phba->Port);
                else
                        snprintf(descp, 255,
                                "Emulex %s %d%s %s %s",
                                m.name, max_speed, (GE) ? "GE" : "Gb",
                                m.bus, m.function);
        }
}

/**
 * lpfc_post_buffer - Post IOCB(s) with DMA buffer descriptor(s) to a IOCB ring
 * @phba: pointer to lpfc hba data structure.
 * @pring: pointer to a IOCB ring.
 * @cnt: the number of IOCBs to be posted to the IOCB ring.
 *
 * This routine posts a given number of IOCBs with the associated DMA buffer
 * descriptors specified by the cnt argument to the given IOCB ring.
 *
 * Return codes
 *   The number of IOCBs NOT able to be posted to the IOCB ring.
 **/
int
lpfc_post_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring, int cnt)
{
        IOCB_t *icmd;
        struct lpfc_iocbq *iocb;
        struct lpfc_dmabuf *mp1, *mp2;

        cnt += pring->missbufcnt;

        /* While there are buffers to post */
        while (cnt > 0) {
                /* Allocate buffer for  command iocb */
                iocb = lpfc_sli_get_iocbq(phba);
                if (iocb == NULL) {
                        pring->missbufcnt = cnt;
                        return cnt;
                }
                icmd = &iocb->iocb;

                /* 2 buffers can be posted per command */
                /* Allocate buffer to post */
                mp1 = kmalloc(sizeof (struct lpfc_dmabuf), GFP_KERNEL);
                if (mp1)
                    mp1->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &mp1->phys);
                if (!mp1 || !mp1->virt) {
                        kfree(mp1);
                        lpfc_sli_release_iocbq(phba, iocb);
                        pring->missbufcnt = cnt;
                        return cnt;
                }

                INIT_LIST_HEAD(&mp1->list);
                /* Allocate buffer to post */
                if (cnt > 1) {
                        mp2 = kmalloc(sizeof (struct lpfc_dmabuf), GFP_KERNEL);
                        if (mp2)
                                mp2->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
                                                            &mp2->phys);
                        if (!mp2 || !mp2->virt) {
                                kfree(mp2);
                                lpfc_mbuf_free(phba, mp1->virt, mp1->phys);
                                kfree(mp1);
                                lpfc_sli_release_iocbq(phba, iocb);
                                pring->missbufcnt = cnt;
                                return cnt;
                        }

                        INIT_LIST_HEAD(&mp2->list);
                } else {
                        mp2 = NULL;
                }

                icmd->un.cont64[0].addrHigh = putPaddrHigh(mp1->phys);
                icmd->un.cont64[0].addrLow = putPaddrLow(mp1->phys);
                icmd->un.cont64[0].tus.f.bdeSize = FCELSSIZE;
                icmd->ulpBdeCount = 1;
                cnt--;
                if (mp2) {
                        icmd->un.cont64[1].addrHigh = putPaddrHigh(mp2->phys);
                        icmd->un.cont64[1].addrLow = putPaddrLow(mp2->phys);
                        icmd->un.cont64[1].tus.f.bdeSize = FCELSSIZE;
                        cnt--;
                        icmd->ulpBdeCount = 2;
                }

                icmd->ulpCommand = CMD_QUE_RING_BUF64_CN;
                icmd->ulpLe = 1;

                if (lpfc_sli_issue_iocb(phba, pring->ringno, iocb, 0) ==
                    IOCB_ERROR) {
                        lpfc_mbuf_free(phba, mp1->virt, mp1->phys);
                        kfree(mp1);
                        cnt++;
                        if (mp2) {
                                lpfc_mbuf_free(phba, mp2->virt, mp2->phys);
                                kfree(mp2);
                                cnt++;
                        }
                        lpfc_sli_release_iocbq(phba, iocb);
                        pring->missbufcnt = cnt;
                        return cnt;
                }
                lpfc_sli_ringpostbuf_put(phba, pring, mp1);
                if (mp2)
                        lpfc_sli_ringpostbuf_put(phba, pring, mp2);
        }
        pring->missbufcnt = 0;
        return 0;
}

/**
 * lpfc_post_rcv_buf - Post the initial receive IOCB buffers to ELS ring
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine posts initial receive IOCB buffers to the ELS ring. The
 * current number of initial IOCB buffers specified by LPFC_BUF_RING0 is
 * set to 64 IOCBs.
 *
 * Return codes
 *   0 - success (currently always success)
 **/
static int
lpfc_post_rcv_buf(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;

        /* Ring 0, ELS / CT buffers */
        lpfc_post_buffer(phba, &psli->ring[LPFC_ELS_RING], LPFC_BUF_RING0);
        /* Ring 2 - FCP no buffers needed */

        return 0;
}

#define S(N,V) (((V)<<(N))|((V)>>(32-(N))))

/**
 * lpfc_sha_init - Set up initial array of hash table entries
 * @HashResultPointer: pointer to an array as hash table.
 *
 * This routine sets up the initial values to the array of hash table entries
 * for the LC HBAs.
 **/
static void
lpfc_sha_init(uint32_t * HashResultPointer)
{
        HashResultPointer[0] = 0x67452301;
        HashResultPointer[1] = 0xEFCDAB89;
        HashResultPointer[2] = 0x98BADCFE;
        HashResultPointer[3] = 0x10325476;
        HashResultPointer[4] = 0xC3D2E1F0;
}

/**
 * lpfc_sha_iterate - Iterate initial hash table with the working hash table
 * @HashResultPointer: pointer to an initial/result hash table.
 * @HashWorkingPointer: pointer to an working hash table.
 *
 * This routine iterates an initial hash table pointed by @HashResultPointer
 * with the values from the working hash table pointeed by @HashWorkingPointer.
 * The results are putting back to the initial hash table, returned through
 * the @HashResultPointer as the result hash table.
 **/
static void
lpfc_sha_iterate(uint32_t * HashResultPointer, uint32_t * HashWorkingPointer)
{
        int t;
        uint32_t TEMP;
        uint32_t A, B, C, D, E;
        t = 16;
        do {
                HashWorkingPointer[t] =
                    S(1,
                      HashWorkingPointer[t - 3] ^ HashWorkingPointer[t -
                                                                     8] ^
                      HashWorkingPointer[t - 14] ^ HashWorkingPointer[t - 16]);
        } while (++t <= 79);
        t = 0;
        A = HashResultPointer[0];
        B = HashResultPointer[1];
        C = HashResultPointer[2];
        D = HashResultPointer[3];
        E = HashResultPointer[4];

        do {
                if (t < 20) {
                        TEMP = ((B & C) | ((~B) & D)) + 0x5A827999;
                } else if (t < 40) {
                        TEMP = (B ^ C ^ D) + 0x6ED9EBA1;
                } else if (t < 60) {
                        TEMP = ((B & C) | (B & D) | (C & D)) + 0x8F1BBCDC;
                } else {
                        TEMP = (B ^ C ^ D) + 0xCA62C1D6;
                }
                TEMP += S(5, A) + E + HashWorkingPointer[t];
                E = D;
                D = C;
                C = S(30, B);
                B = A;
                A = TEMP;
        } while (++t <= 79);

        HashResultPointer[0] += A;
        HashResultPointer[1] += B;
        HashResultPointer[2] += C;
        HashResultPointer[3] += D;
        HashResultPointer[4] += E;

}

/**
 * lpfc_challenge_key - Create challenge key based on WWPN of the HBA
 * @RandomChallenge: pointer to the entry of host challenge random number array.
 * @HashWorking: pointer to the entry of the working hash array.
 *
 * This routine calculates the working hash array referred by @HashWorking
 * from the challenge random numbers associated with the host, referred by
 * @RandomChallenge. The result is put into the entry of the working hash
 * array and returned by reference through @HashWorking.
 **/
static void
lpfc_challenge_key(uint32_t * RandomChallenge, uint32_t * HashWorking)
{
        *HashWorking = (*RandomChallenge ^ *HashWorking);
}

/**
 * lpfc_hba_init - Perform special handling for LC HBA initialization
 * @phba: pointer to lpfc hba data structure.
 * @hbainit: pointer to an array of unsigned 32-bit integers.
 *
 * This routine performs the special handling for LC HBA initialization.
 **/
void
lpfc_hba_init(struct lpfc_hba *phba, uint32_t *hbainit)
{
        int t;
        uint32_t *HashWorking;
        uint32_t *pwwnn = (uint32_t *) phba->wwnn;

        HashWorking = kcalloc(80, sizeof(uint32_t), GFP_KERNEL);
        if (!HashWorking)
                return;

        HashWorking[0] = HashWorking[78] = *pwwnn++;
        HashWorking[1] = HashWorking[79] = *pwwnn;

        for (t = 0; t < 7; t++)
                lpfc_challenge_key(phba->RandomData + t, HashWorking + t);

        lpfc_sha_init(hbainit);
        lpfc_sha_iterate(hbainit, HashWorking);
        kfree(HashWorking);
}

/**
 * lpfc_cleanup - Performs vport cleanups before deleting a vport
 * @vport: pointer to a virtual N_Port data structure.
 *
 * This routine performs the necessary cleanups before deleting the @vport.
 * It invokes the discovery state machine to perform necessary state
 * transitions and to release the ndlps associated with the @vport. Note,
 * the physical port is treated as @vport 0.
 **/
void
lpfc_cleanup(struct lpfc_vport *vport)
{
        struct lpfc_hba   *phba = vport->phba;
        struct lpfc_nodelist *ndlp, *next_ndlp;
        int i = 0;

        if (phba->link_state > LPFC_LINK_DOWN)
                lpfc_port_link_failure(vport);

        list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
                if (!NLP_CHK_NODE_ACT(ndlp)) {
                        ndlp = lpfc_enable_node(vport, ndlp,
                                                NLP_STE_UNUSED_NODE);
                        if (!ndlp)
                                continue;
                        spin_lock_irq(&phba->ndlp_lock);
                        NLP_SET_FREE_REQ(ndlp);
                        spin_unlock_irq(&phba->ndlp_lock);
                        /* Trigger the release of the ndlp memory */
                        lpfc_nlp_put(ndlp);
                        continue;
                }
                spin_lock_irq(&phba->ndlp_lock);
                if (NLP_CHK_FREE_REQ(ndlp)) {
                        /* The ndlp should not be in memory free mode already */
                        spin_unlock_irq(&phba->ndlp_lock);
                        continue;
                } else
                        /* Indicate request for freeing ndlp memory */
                        NLP_SET_FREE_REQ(ndlp);
                spin_unlock_irq(&phba->ndlp_lock);

                if (vport->port_type != LPFC_PHYSICAL_PORT &&
                    ndlp->nlp_DID == Fabric_DID) {
                        /* Just free up ndlp with Fabric_DID for vports */
                        lpfc_nlp_put(ndlp);
                        continue;
                }

                if (ndlp->nlp_type & NLP_FABRIC)
                        lpfc_disc_state_machine(vport, ndlp, NULL,
                                        NLP_EVT_DEVICE_RECOVERY);

                lpfc_disc_state_machine(vport, ndlp, NULL,
                                             NLP_EVT_DEVICE_RM);

        }

        /* At this point, ALL ndlp's should be gone
         * because of the previous NLP_EVT_DEVICE_RM.
         * Lets wait for this to happen, if needed.
         */
        while (!list_empty(&vport->fc_nodes)) {
                if (i++ > 3000) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
                                "0233 Nodelist not empty\n");
                        list_for_each_entry_safe(ndlp, next_ndlp,
                                                &vport->fc_nodes, nlp_listp) {
                                lpfc_printf_vlog(ndlp->vport, KERN_ERR,
                                                LOG_NODE,
                                                "0282 did:x%x ndlp:x%p "
                                                "usgmap:x%x refcnt:%d\n",
                                                ndlp->nlp_DID, (void *)ndlp,
                                                ndlp->nlp_usg_map,
                                                atomic_read(
                                                        &ndlp->kref.refcount));
                        }
                        break;
                }

                /* Wait for any activity on ndlps to settle */
                msleep(10);
        }
}

/**
 * lpfc_stop_vport_timers - Stop all the timers associated with a vport
 * @vport: pointer to a virtual N_Port data structure.
 *
 * This routine stops all the timers associated with a @vport. This function
 * is invoked before disabling or deleting a @vport. Note that the physical
 * port is treated as @vport 0.
 **/
void
lpfc_stop_vport_timers(struct lpfc_vport *vport)
{
        del_timer_sync(&vport->els_tmofunc);
        del_timer_sync(&vport->fc_fdmitmo);
        lpfc_can_disctmo(vport);
        return;
}

/**
 * __lpfc_sli4_stop_fcf_redisc_wait_timer - Stop FCF rediscovery wait timer
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine stops the SLI4 FCF rediscover wait timer if it's on. The
 * caller of this routine should already hold the host lock.
 **/
void
__lpfc_sli4_stop_fcf_redisc_wait_timer(struct lpfc_hba *phba)
{
        /* Clear pending FCF rediscovery wait timer */
        phba->fcf.fcf_flag &= ~FCF_REDISC_PEND;
        /* Now, try to stop the timer */
        del_timer(&phba->fcf.redisc_wait);
}

/**
 * lpfc_sli4_stop_fcf_redisc_wait_timer - Stop FCF rediscovery wait timer
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine stops the SLI4 FCF rediscover wait timer if it's on. It
 * checks whether the FCF rediscovery wait timer is pending with the host
 * lock held before proceeding with disabling the timer and clearing the
 * wait timer pendig flag.
 **/
void
lpfc_sli4_stop_fcf_redisc_wait_timer(struct lpfc_hba *phba)
{
        spin_lock_irq(&phba->hbalock);
        if (!(phba->fcf.fcf_flag & FCF_REDISC_PEND)) {
                /* FCF rediscovery timer already fired or stopped */
                spin_unlock_irq(&phba->hbalock);
                return;
        }
        __lpfc_sli4_stop_fcf_redisc_wait_timer(phba);
        spin_unlock_irq(&phba->hbalock);
}

/**
 * lpfc_stop_hba_timers - Stop all the timers associated with an HBA
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine stops all the timers associated with a HBA. This function is
 * invoked before either putting a HBA offline or unloading the driver.
 **/
void
lpfc_stop_hba_timers(struct lpfc_hba *phba)
{
        lpfc_stop_vport_timers(phba->pport);
        del_timer_sync(&phba->sli.mbox_tmo);
        del_timer_sync(&phba->fabric_block_timer);
        del_timer_sync(&phba->eratt_poll);
        del_timer_sync(&phba->hb_tmofunc);
        phba->hb_outstanding = 0;

        switch (phba->pci_dev_grp) {
        case LPFC_PCI_DEV_LP:
                /* Stop any LightPulse device specific driver timers */
                del_timer_sync(&phba->fcp_poll_timer);
                break;
        case LPFC_PCI_DEV_OC:
                /* Stop any OneConnect device sepcific driver timers */
                lpfc_sli4_stop_fcf_redisc_wait_timer(phba);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0297 Invalid device group (x%x)\n",
                                phba->pci_dev_grp);
                break;
        }
        return;
}

/**
 * lpfc_block_mgmt_io - Mark a HBA's management interface as blocked
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine marks a HBA's management interface as blocked. Once the HBA's
 * management interface is marked as blocked, all the user space access to
 * the HBA, whether they are from sysfs interface or libdfc interface will
 * all be blocked. The HBA is set to block the management interface when the
 * driver prepares the HBA interface for online or offline.
 **/
static void
lpfc_block_mgmt_io(struct lpfc_hba * phba)
{
        unsigned long iflag;

        spin_lock_irqsave(&phba->hbalock, iflag);
        phba->sli.sli_flag |= LPFC_BLOCK_MGMT_IO;
        spin_unlock_irqrestore(&phba->hbalock, iflag);
}

/**
 * lpfc_online - Initialize and bring a HBA online
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine initializes the HBA and brings a HBA online. During this
 * process, the management interface is blocked to prevent user space access
 * to the HBA interfering with the driver initialization.
 *
 * Return codes
 *   0 - successful
 *   1 - failed
 **/
int
lpfc_online(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport;
        struct lpfc_vport **vports;
        int i;

        if (!phba)
                return 0;
        vport = phba->pport;

        if (!(vport->fc_flag & FC_OFFLINE_MODE))
                return 0;

        lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                        "0458 Bring Adapter online\n");

        lpfc_block_mgmt_io(phba);

        if (!lpfc_sli_queue_setup(phba)) {
                lpfc_unblock_mgmt_io(phba);
                return 1;
        }

        if (phba->sli_rev == LPFC_SLI_REV4) {
                if (lpfc_sli4_hba_setup(phba)) { /* Initialize SLI4 HBA */
                        lpfc_unblock_mgmt_io(phba);
                        return 1;
                }
        } else {
                if (lpfc_sli_hba_setup(phba)) { /* Initialize SLI2/SLI3 HBA */
                        lpfc_unblock_mgmt_io(phba);
                        return 1;
                }
        }

        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                        struct Scsi_Host *shost;
                        shost = lpfc_shost_from_vport(vports[i]);
                        spin_lock_irq(shost->host_lock);
                        vports[i]->fc_flag &= ~FC_OFFLINE_MODE;
                        if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
                                vports[i]->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
                        if (phba->sli_rev == LPFC_SLI_REV4)
                                vports[i]->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
                        spin_unlock_irq(shost->host_lock);
                }
                lpfc_destroy_vport_work_array(phba, vports);

        lpfc_unblock_mgmt_io(phba);
        return 0;
}

/**
 * lpfc_unblock_mgmt_io - Mark a HBA's management interface to be not blocked
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine marks a HBA's management interface as not blocked. Once the
 * HBA's management interface is marked as not blocked, all the user space
 * access to the HBA, whether they are from sysfs interface or libdfc
 * interface will be allowed. The HBA is set to block the management interface
 * when the driver prepares the HBA interface for online or offline and then
 * set to unblock the management interface afterwards.
 **/
void
lpfc_unblock_mgmt_io(struct lpfc_hba * phba)
{
        unsigned long iflag;

        spin_lock_irqsave(&phba->hbalock, iflag);
        phba->sli.sli_flag &= ~LPFC_BLOCK_MGMT_IO;
        spin_unlock_irqrestore(&phba->hbalock, iflag);
}

/**
 * lpfc_offline_prep - Prepare a HBA to be brought offline
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to prepare a HBA to be brought offline. It performs
 * unregistration login to all the nodes on all vports and flushes the mailbox
 * queue to make it ready to be brought offline.
 **/
void
lpfc_offline_prep(struct lpfc_hba * phba)
{
        struct lpfc_vport *vport = phba->pport;
        struct lpfc_nodelist  *ndlp, *next_ndlp;
        struct lpfc_vport **vports;
        struct Scsi_Host *shost;
        int i;

        if (vport->fc_flag & FC_OFFLINE_MODE)
                return;

        lpfc_block_mgmt_io(phba);

        lpfc_linkdown(phba);

        /* Issue an unreg_login to all nodes on all vports */
        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL) {
                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                        if (vports[i]->load_flag & FC_UNLOADING)
                                continue;
                        shost = lpfc_shost_from_vport(vports[i]);
                        spin_lock_irq(shost->host_lock);
                        vports[i]->vpi_state &= ~LPFC_VPI_REGISTERED;
                        vports[i]->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
                        vports[i]->fc_flag &= ~FC_VFI_REGISTERED;
                        spin_unlock_irq(shost->host_lock);

                        shost = lpfc_shost_from_vport(vports[i]);
                        list_for_each_entry_safe(ndlp, next_ndlp,
                                                 &vports[i]->fc_nodes,
                                                 nlp_listp) {
                                if (!NLP_CHK_NODE_ACT(ndlp))
                                        continue;
                                if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
                                        continue;
                                if (ndlp->nlp_type & NLP_FABRIC) {
                                        lpfc_disc_state_machine(vports[i], ndlp,
                                                NULL, NLP_EVT_DEVICE_RECOVERY);
                                        lpfc_disc_state_machine(vports[i], ndlp,
                                                NULL, NLP_EVT_DEVICE_RM);
                                }
                                spin_lock_irq(shost->host_lock);
                                ndlp->nlp_flag &= ~NLP_NPR_ADISC;
                                spin_unlock_irq(shost->host_lock);
                                lpfc_unreg_rpi(vports[i], ndlp);
                        }
                }
        }
        lpfc_destroy_vport_work_array(phba, vports);

        lpfc_sli_mbox_sys_shutdown(phba);
}

/**
 * lpfc_offline - Bring a HBA offline
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine actually brings a HBA offline. It stops all the timers
 * associated with the HBA, brings down the SLI layer, and eventually
 * marks the HBA as in offline state for the upper layer protocol.
 **/
void
lpfc_offline(struct lpfc_hba *phba)
{
        struct Scsi_Host  *shost;
        struct lpfc_vport **vports;
        int i;

        if (phba->pport->fc_flag & FC_OFFLINE_MODE)
                return;

        /* stop port and all timers associated with this hba */
        lpfc_stop_port(phba);
        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
                        lpfc_stop_vport_timers(vports[i]);
        lpfc_destroy_vport_work_array(phba, vports);
        lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                        "0460 Bring Adapter offline\n");
        /* Bring down the SLI Layer and cleanup.  The HBA is offline
           now.  */
        lpfc_sli_hba_down(phba);
        spin_lock_irq(&phba->hbalock);
        phba->work_ha = 0;
        spin_unlock_irq(&phba->hbalock);
        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                        shost = lpfc_shost_from_vport(vports[i]);
                        spin_lock_irq(shost->host_lock);
                        vports[i]->work_port_events = 0;
                        vports[i]->fc_flag |= FC_OFFLINE_MODE;
                        spin_unlock_irq(shost->host_lock);
                }
        lpfc_destroy_vport_work_array(phba, vports);
}

/**
 * lpfc_scsi_free - Free all the SCSI buffers and IOCBs from driver lists
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is to free all the SCSI buffers and IOCBs from the driver
 * list back to kernel. It is called from lpfc_pci_remove_one to free
 * the internal resources before the device is removed from the system.
 *
 * Return codes
 *   0 - successful (for now, it always returns 0)
 **/
static int
lpfc_scsi_free(struct lpfc_hba *phba)
{
        struct lpfc_scsi_buf *sb, *sb_next;
        struct lpfc_iocbq *io, *io_next;

        spin_lock_irq(&phba->hbalock);
        /* Release all the lpfc_scsi_bufs maintained by this host. */
        spin_lock(&phba->scsi_buf_list_lock);
        list_for_each_entry_safe(sb, sb_next, &phba->lpfc_scsi_buf_list, list) {
                list_del(&sb->list);
                pci_pool_free(phba->lpfc_scsi_dma_buf_pool, sb->data,
                              sb->dma_handle);
                kfree(sb);
                phba->total_scsi_bufs--;
        }
        spin_unlock(&phba->scsi_buf_list_lock);

        /* Release all the lpfc_iocbq entries maintained by this host. */
        list_for_each_entry_safe(io, io_next, &phba->lpfc_iocb_list, list) {
                list_del(&io->list);
                kfree(io);
                phba->total_iocbq_bufs--;
        }
        spin_unlock_irq(&phba->hbalock);
        return 0;
}

/**
 * lpfc_create_port - Create an FC port
 * @phba: pointer to lpfc hba data structure.
 * @instance: a unique integer ID to this FC port.
 * @dev: pointer to the device data structure.
 *
 * This routine creates a FC port for the upper layer protocol. The FC port
 * can be created on top of either a physical port or a virtual port provided
 * by the HBA. This routine also allocates a SCSI host data structure (shost)
 * and associates the FC port created before adding the shost into the SCSI
 * layer.
 *
 * Return codes
 *   @vport - pointer to the virtual N_Port data structure.
 *   NULL - port create failed.
 **/
struct lpfc_vport *
lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
{
        struct lpfc_vport *vport;
        struct Scsi_Host  *shost;
        int error = 0;

        if (dev != &phba->pcidev->dev)
                shost = scsi_host_alloc(&lpfc_vport_template,
                                        sizeof(struct lpfc_vport));
        else
                shost = scsi_host_alloc(&lpfc_template,
                                        sizeof(struct lpfc_vport));
        if (!shost)
                goto out;

        vport = (struct lpfc_vport *) shost->hostdata;
        vport->phba = phba;
        vport->load_flag |= FC_LOADING;
        vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
        vport->fc_rscn_flush = 0;

        lpfc_get_vport_cfgparam(vport);
        shost->unique_id = instance;
        shost->max_id = LPFC_MAX_TARGET;
        shost->max_lun = vport->cfg_max_luns;
        shost->this_id = -1;
        shost->max_cmd_len = 16;
        if (phba->sli_rev == LPFC_SLI_REV4) {
                shost->dma_boundary =
                        phba->sli4_hba.pc_sli4_params.sge_supp_len;
                shost->sg_tablesize = phba->cfg_sg_seg_cnt;
        }

        /*
         * Set initial can_queue value since 0 is no longer supported and
         * scsi_add_host will fail. This will be adjusted later based on the
         * max xri value determined in hba setup.
         */
        shost->can_queue = phba->cfg_hba_queue_depth - 10;
        if (dev != &phba->pcidev->dev) {
                shost->transportt = lpfc_vport_transport_template;
                vport->port_type = LPFC_NPIV_PORT;
        } else {
                shost->transportt = lpfc_transport_template;
                vport->port_type = LPFC_PHYSICAL_PORT;
        }

        /* Initialize all internally managed lists. */
        INIT_LIST_HEAD(&vport->fc_nodes);
        INIT_LIST_HEAD(&vport->rcv_buffer_list);
        spin_lock_init(&vport->work_port_lock);

        init_timer(&vport->fc_disctmo);
        vport->fc_disctmo.function = lpfc_disc_timeout;
        vport->fc_disctmo.data = (unsigned long)vport;

        init_timer(&vport->fc_fdmitmo);
        vport->fc_fdmitmo.function = lpfc_fdmi_tmo;
        vport->fc_fdmitmo.data = (unsigned long)vport;

        init_timer(&vport->els_tmofunc);
        vport->els_tmofunc.function = lpfc_els_timeout;
        vport->els_tmofunc.data = (unsigned long)vport;

        error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
        if (error)
                goto out_put_shost;

        spin_lock_irq(&phba->hbalock);
        list_add_tail(&vport->listentry, &phba->port_list);
        spin_unlock_irq(&phba->hbalock);
        return vport;

out_put_shost:
        scsi_host_put(shost);
out:
        return NULL;
}

/**
 * destroy_port -  destroy an FC port
 * @vport: pointer to an lpfc virtual N_Port data structure.
 *
 * This routine destroys a FC port from the upper layer protocol. All the
 * resources associated with the port are released.
 **/
void
destroy_port(struct lpfc_vport *vport)
{
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
        struct lpfc_hba  *phba = vport->phba;

        lpfc_debugfs_terminate(vport);
        fc_remove_host(shost);
        scsi_remove_host(shost);

        spin_lock_irq(&phba->hbalock);
        list_del_init(&vport->listentry);
        spin_unlock_irq(&phba->hbalock);

        lpfc_cleanup(vport);
        return;
}

/**
 * lpfc_get_instance - Get a unique integer ID
 *
 * This routine allocates a unique integer ID from lpfc_hba_index pool. It
 * uses the kernel idr facility to perform the task.
 *
 * Return codes:
 *   instance - a unique integer ID allocated as the new instance.
 *   -1 - lpfc get instance failed.
 **/
int
lpfc_get_instance(void)
{
        int instance = 0;

        /* Assign an unused number */
        if (!idr_pre_get(&lpfc_hba_index, GFP_KERNEL))
                return -1;
        if (idr_get_new(&lpfc_hba_index, NULL, &instance))
                return -1;
        return instance;
}

/**
 * lpfc_scan_finished - method for SCSI layer to detect whether scan is done
 * @shost: pointer to SCSI host data structure.
 * @time: elapsed time of the scan in jiffies.
 *
 * This routine is called by the SCSI layer with a SCSI host to determine
 * whether the scan host is finished.
 *
 * Note: there is no scan_start function as adapter initialization will have
 * asynchronously kicked off the link initialization.
 *
 * Return codes
 *   0 - SCSI host scan is not over yet.
 *   1 - SCSI host scan is over.
 **/
int lpfc_scan_finished(struct Scsi_Host *shost, unsigned long time)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int stat = 0;

        spin_lock_irq(shost->host_lock);

        if (vport->load_flag & FC_UNLOADING) {
                stat = 1;
                goto finished;
        }
        if (time >= 30 * HZ) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0461 Scanning longer than 30 "
                                "seconds.  Continuing initialization\n");
                stat = 1;
                goto finished;
        }
        if (time >= 15 * HZ && phba->link_state <= LPFC_LINK_DOWN) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0465 Link down longer than 15 "
                                "seconds.  Continuing initialization\n");
                stat = 1;
                goto finished;
        }

        if (vport->port_state != LPFC_VPORT_READY)
                goto finished;
        if (vport->num_disc_nodes || vport->fc_prli_sent)
                goto finished;
        if (vport->fc_map_cnt == 0 && time < 2 * HZ)
                goto finished;
        if ((phba->sli.sli_flag & LPFC_SLI_MBOX_ACTIVE) != 0)
                goto finished;

        stat = 1;

finished:
        spin_unlock_irq(shost->host_lock);
        return stat;
}

/**
 * lpfc_host_attrib_init - Initialize SCSI host attributes on a FC port
 * @shost: pointer to SCSI host data structure.
 *
 * This routine initializes a given SCSI host attributes on a FC port. The
 * SCSI host can be either on top of a physical port or a virtual port.
 **/
void lpfc_host_attrib_init(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        /*
         * Set fixed host attributes.  Must done after lpfc_sli_hba_setup().
         */

        fc_host_node_name(shost) = wwn_to_u64(vport->fc_nodename.u.wwn);
        fc_host_port_name(shost) = wwn_to_u64(vport->fc_portname.u.wwn);
        fc_host_supported_classes(shost) = FC_COS_CLASS3;

        memset(fc_host_supported_fc4s(shost), 0,
               sizeof(fc_host_supported_fc4s(shost)));
        fc_host_supported_fc4s(shost)[2] = 1;
        fc_host_supported_fc4s(shost)[7] = 1;

        lpfc_vport_symbolic_node_name(vport, fc_host_symbolic_name(shost),
                                 sizeof fc_host_symbolic_name(shost));

        fc_host_supported_speeds(shost) = 0;
        if (phba->lmt & LMT_10Gb)
                fc_host_supported_speeds(shost) |= FC_PORTSPEED_10GBIT;
        if (phba->lmt & LMT_8Gb)
                fc_host_supported_speeds(shost) |= FC_PORTSPEED_8GBIT;
        if (phba->lmt & LMT_4Gb)
                fc_host_supported_speeds(shost) |= FC_PORTSPEED_4GBIT;
        if (phba->lmt & LMT_2Gb)
                fc_host_supported_speeds(shost) |= FC_PORTSPEED_2GBIT;
        if (phba->lmt & LMT_1Gb)
                fc_host_supported_speeds(shost) |= FC_PORTSPEED_1GBIT;

        fc_host_maxframe_size(shost) =
                (((uint32_t) vport->fc_sparam.cmn.bbRcvSizeMsb & 0x0F) << 8) |
                (uint32_t) vport->fc_sparam.cmn.bbRcvSizeLsb;

        /* This value is also unchanging */
        memset(fc_host_active_fc4s(shost), 0,
               sizeof(fc_host_active_fc4s(shost)));
        fc_host_active_fc4s(shost)[2] = 1;
        fc_host_active_fc4s(shost)[7] = 1;

        fc_host_max_npiv_vports(shost) = phba->max_vpi;
        spin_lock_irq(shost->host_lock);
        vport->load_flag &= ~FC_LOADING;
        spin_unlock_irq(shost->host_lock);
}

/**
 * lpfc_stop_port_s3 - Stop SLI3 device port
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to stop an SLI3 device port, it stops the device
 * from generating interrupts and stops the device driver's timers for the
 * device.
 **/
static void
lpfc_stop_port_s3(struct lpfc_hba *phba)
{
        /* Clear all interrupt enable conditions */
        writel(0, phba->HCregaddr);
        readl(phba->HCregaddr); /* flush */
        /* Clear all pending interrupts */
        writel(0xffffffff, phba->HAregaddr);
        readl(phba->HAregaddr); /* flush */

        /* Reset some HBA SLI setup states */
        lpfc_stop_hba_timers(phba);
        phba->pport->work_port_events = 0;
}

/**
 * lpfc_stop_port_s4 - Stop SLI4 device port
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to stop an SLI4 device port, it stops the device
 * from generating interrupts and stops the device driver's timers for the
 * device.
 **/
static void
lpfc_stop_port_s4(struct lpfc_hba *phba)
{
        /* Reset some HBA SLI4 setup states */
        lpfc_stop_hba_timers(phba);
        phba->pport->work_port_events = 0;
        phba->sli4_hba.intr_enable = 0;
}

/**
 * lpfc_stop_port - Wrapper function for stopping hba port
 * @phba: Pointer to HBA context object.
 *
 * This routine wraps the actual SLI3 or SLI4 hba stop port routine from
 * the API jump table function pointer from the lpfc_hba struct.
 **/
void
lpfc_stop_port(struct lpfc_hba *phba)
{
        phba->lpfc_stop_port(phba);
}

/**
 * lpfc_sli4_remove_dflt_fcf - Remove the driver default fcf record from the port.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to remove the driver default fcf record from
 * the port.  This routine currently acts on FCF Index 0.
 *
 **/
void
lpfc_sli_remove_dflt_fcf(struct lpfc_hba *phba)
{
        int rc = 0;
        LPFC_MBOXQ_t *mboxq;
        struct lpfc_mbx_del_fcf_tbl_entry *del_fcf_record;
        uint32_t mbox_tmo, req_len;
        uint32_t shdr_status, shdr_add_status;

        mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2020 Failed to allocate mbox for ADD_FCF cmd\n");
                return;
        }

        req_len = sizeof(struct lpfc_mbx_del_fcf_tbl_entry) -
                  sizeof(struct lpfc_sli4_cfg_mhdr);
        rc = lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_FCOE,
                              LPFC_MBOX_OPCODE_FCOE_DELETE_FCF,
                              req_len, LPFC_SLI4_MBX_EMBED);
        /*
         * In phase 1, there is a single FCF index, 0.  In phase2, the driver
         * supports multiple FCF indices.
         */
        del_fcf_record = &mboxq->u.mqe.un.del_fcf_entry;
        bf_set(lpfc_mbx_del_fcf_tbl_count, del_fcf_record, 1);
        bf_set(lpfc_mbx_del_fcf_tbl_index, del_fcf_record,
               phba->fcf.current_rec.fcf_indx);

        if (!phba->sli4_hba.intr_enable)
                rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        else {
                mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_SLI4_CONFIG);
                rc = lpfc_sli_issue_mbox_wait(phba, mboxq, mbox_tmo);
        }
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr_status = bf_get(lpfc_mbox_hdr_status,
                             &del_fcf_record->header.cfg_shdr.response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status,
                                 &del_fcf_record->header.cfg_shdr.response);
        if (shdr_status || shdr_add_status || rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2516 DEL FCF of default FCF Index failed "
                                "mbx status x%x, status x%x add_status x%x\n",
                                rc, shdr_status, shdr_add_status);
        }
        if (rc != MBX_TIMEOUT)
                mempool_free(mboxq, phba->mbox_mem_pool);
}

/**
 * lpfc_fcf_redisc_wait_start_timer - Start fcf rediscover wait timer
 * @phba: Pointer to hba for which this call is being executed.
 *
 * This routine starts the timer waiting for the FCF rediscovery to complete.
 **/
void
lpfc_fcf_redisc_wait_start_timer(struct lpfc_hba *phba)
{
        unsigned long fcf_redisc_wait_tmo =
                (jiffies + msecs_to_jiffies(LPFC_FCF_REDISCOVER_WAIT_TMO));
        /* Start fcf rediscovery wait period timer */
        mod_timer(&phba->fcf.redisc_wait, fcf_redisc_wait_tmo);
        spin_lock_irq(&phba->hbalock);
        /* Allow action to new fcf asynchronous event */
        phba->fcf.fcf_flag &= ~(FCF_AVAILABLE | FCF_SCAN_DONE);
        /* Mark the FCF rediscovery pending state */
        phba->fcf.fcf_flag |= FCF_REDISC_PEND;
        spin_unlock_irq(&phba->hbalock);
}

/**
 * lpfc_sli4_fcf_redisc_wait_tmo - FCF table rediscover wait timeout
 * @ptr: Map to lpfc_hba data structure pointer.
 *
 * This routine is invoked when waiting for FCF table rediscover has been
 * timed out. If new FCF record(s) has (have) been discovered during the
 * wait period, a new FCF event shall be added to the FCOE async event
 * list, and then worker thread shall be waked up for processing from the
 * worker thread context.
 **/
void
lpfc_sli4_fcf_redisc_wait_tmo(unsigned long ptr)
{
        struct lpfc_hba *phba = (struct lpfc_hba *)ptr;

        /* Don't send FCF rediscovery event if timer cancelled */
        spin_lock_irq(&phba->hbalock);
        if (!(phba->fcf.fcf_flag & FCF_REDISC_PEND)) {
                spin_unlock_irq(&phba->hbalock);
                return;
        }
        /* Clear FCF rediscovery timer pending flag */
        phba->fcf.fcf_flag &= ~FCF_REDISC_PEND;
        /* FCF rediscovery event to worker thread */
        phba->fcf.fcf_flag |= FCF_REDISC_EVT;
        spin_unlock_irq(&phba->hbalock);
        /* wake up worker thread */
        lpfc_worker_wake_up(phba);
}

/**
 * lpfc_sli4_fw_cfg_check - Read the firmware config and verify FCoE support
 * @phba: pointer to lpfc hba data structure.
 *
 * This function uses the QUERY_FW_CFG mailbox command to determine if the
 * firmware loaded supports FCoE. A return of zero indicates that the mailbox
 * was successful and the firmware supports FCoE. Any other return indicates
 * a error. It is assumed that this function will be called before interrupts
 * are enabled.
 **/
static int
lpfc_sli4_fw_cfg_check(struct lpfc_hba *phba)
{
        int rc = 0;
        LPFC_MBOXQ_t *mboxq;
        struct lpfc_mbx_query_fw_cfg *query_fw_cfg;
        uint32_t length;
        uint32_t shdr_status, shdr_add_status;

        mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2621 Failed to allocate mbox for "
                                "query firmware config cmd\n");
                return -ENOMEM;
        }
        query_fw_cfg = &mboxq->u.mqe.un.query_fw_cfg;
        length = (sizeof(struct lpfc_mbx_query_fw_cfg) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_QUERY_FW_CFG,
                         length, LPFC_SLI4_MBX_EMBED);
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        /* The IOCTL status is embedded in the mailbox subheader. */
        shdr_status = bf_get(lpfc_mbox_hdr_status,
                             &query_fw_cfg->header.cfg_shdr.response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status,
                                 &query_fw_cfg->header.cfg_shdr.response);
        if (shdr_status || shdr_add_status || rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2622 Query Firmware Config failed "
                                "mbx status x%x, status x%x add_status x%x\n",
                                rc, shdr_status, shdr_add_status);
                return -EINVAL;
        }
        if (!bf_get(lpfc_function_mode_fcoe_i, query_fw_cfg)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2623 FCoE Function not supported by firmware. "
                                "Function mode = %08x\n",
                                query_fw_cfg->function_mode);
                return -EINVAL;
        }
        if (rc != MBX_TIMEOUT)
                mempool_free(mboxq, phba->mbox_mem_pool);
        return 0;
}

/**
 * lpfc_sli4_parse_latt_fault - Parse sli4 link-attention link fault code
 * @phba: pointer to lpfc hba data structure.
 * @acqe_link: pointer to the async link completion queue entry.
 *
 * This routine is to parse the SLI4 link-attention link fault code and
 * translate it into the base driver's read link attention mailbox command
 * status.
 *
 * Return: Link-attention status in terms of base driver's coding.
 **/
static uint16_t
lpfc_sli4_parse_latt_fault(struct lpfc_hba *phba,
                           struct lpfc_acqe_link *acqe_link)
{
        uint16_t latt_fault;

        switch (bf_get(lpfc_acqe_link_fault, acqe_link)) {
        case LPFC_ASYNC_LINK_FAULT_NONE:
        case LPFC_ASYNC_LINK_FAULT_LOCAL:
        case LPFC_ASYNC_LINK_FAULT_REMOTE:
                latt_fault = 0;
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0398 Invalid link fault code: x%x\n",
                                bf_get(lpfc_acqe_link_fault, acqe_link));
                latt_fault = MBXERR_ERROR;
                break;
        }
        return latt_fault;
}

/**
 * lpfc_sli4_parse_latt_type - Parse sli4 link attention type
 * @phba: pointer to lpfc hba data structure.
 * @acqe_link: pointer to the async link completion queue entry.
 *
 * This routine is to parse the SLI4 link attention type and translate it
 * into the base driver's link attention type coding.
 *
 * Return: Link attention type in terms of base driver's coding.
 **/
static uint8_t
lpfc_sli4_parse_latt_type(struct lpfc_hba *phba,
                          struct lpfc_acqe_link *acqe_link)
{
        uint8_t att_type;

        switch (bf_get(lpfc_acqe_link_status, acqe_link)) {
        case LPFC_ASYNC_LINK_STATUS_DOWN:
        case LPFC_ASYNC_LINK_STATUS_LOGICAL_DOWN:
                att_type = AT_LINK_DOWN;
                break;
        case LPFC_ASYNC_LINK_STATUS_UP:
                /* Ignore physical link up events - wait for logical link up */
                att_type = AT_RESERVED;
                break;
        case LPFC_ASYNC_LINK_STATUS_LOGICAL_UP:
                att_type = AT_LINK_UP;
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0399 Invalid link attention type: x%x\n",
                                bf_get(lpfc_acqe_link_status, acqe_link));
                att_type = AT_RESERVED;
                break;
        }
        return att_type;
}

/**
 * lpfc_sli4_parse_latt_link_speed - Parse sli4 link-attention link speed
 * @phba: pointer to lpfc hba data structure.
 * @acqe_link: pointer to the async link completion queue entry.
 *
 * This routine is to parse the SLI4 link-attention link speed and translate
 * it into the base driver's link-attention link speed coding.
 *
 * Return: Link-attention link speed in terms of base driver's coding.
 **/
static uint8_t
lpfc_sli4_parse_latt_link_speed(struct lpfc_hba *phba,
                                struct lpfc_acqe_link *acqe_link)
{
        uint8_t link_speed;

        switch (bf_get(lpfc_acqe_link_speed, acqe_link)) {
        case LPFC_ASYNC_LINK_SPEED_ZERO:
                link_speed = LA_UNKNW_LINK;
                break;
        case LPFC_ASYNC_LINK_SPEED_10MBPS:
                link_speed = LA_UNKNW_LINK;
                break;
        case LPFC_ASYNC_LINK_SPEED_100MBPS:
                link_speed = LA_UNKNW_LINK;
                break;
        case LPFC_ASYNC_LINK_SPEED_1GBPS:
                link_speed = LA_1GHZ_LINK;
                break;
        case LPFC_ASYNC_LINK_SPEED_10GBPS:
                link_speed = LA_10GHZ_LINK;
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0483 Invalid link-attention link speed: x%x\n",
                                bf_get(lpfc_acqe_link_speed, acqe_link));
                link_speed = LA_UNKNW_LINK;
                break;
        }
        return link_speed;
}

/**
 * lpfc_sli4_async_link_evt - Process the asynchronous link event
 * @phba: pointer to lpfc hba data structure.
 * @acqe_link: pointer to the async link completion queue entry.
 *
 * This routine is to handle the SLI4 asynchronous link event.
 **/
static void
lpfc_sli4_async_link_evt(struct lpfc_hba *phba,
                         struct lpfc_acqe_link *acqe_link)
{
        struct lpfc_dmabuf *mp;
        LPFC_MBOXQ_t *pmb;
        MAILBOX_t *mb;
        READ_LA_VAR *la;
        uint8_t att_type;

        att_type = lpfc_sli4_parse_latt_type(phba, acqe_link);
        if (att_type != AT_LINK_DOWN && att_type != AT_LINK_UP)
                return;
        phba->fcoe_eventtag = acqe_link->event_tag;
        pmb = (LPFC_MBOXQ_t *)mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0395 The mboxq allocation failed\n");
                return;
        }
        mp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
        if (!mp) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0396 The lpfc_dmabuf allocation failed\n");
                goto out_free_pmb;
        }
        mp->virt = lpfc_mbuf_alloc(phba, 0, &mp->phys);
        if (!mp->virt) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "0397 The mbuf allocation failed\n");
                goto out_free_dmabuf;
        }

        /* Cleanup any outstanding ELS commands */
        lpfc_els_flush_all_cmd(phba);

        /* Block ELS IOCBs until we have done process link event */
        phba->sli.ring[LPFC_ELS_RING].flag |= LPFC_STOP_IOCB_EVENT;

        /* Update link event statistics */
        phba->sli.slistat.link_event++;

        /* Create pseudo lpfc_handle_latt mailbox command from link ACQE */
        lpfc_read_la(phba, pmb, mp);
        pmb->vport = phba->pport;

        /* Parse and translate status field */
        mb = &pmb->u.mb;
        mb->mbxStatus = lpfc_sli4_parse_latt_fault(phba, acqe_link);

        /* Parse and translate link attention fields */
        la = (READ_LA_VAR *) &pmb->u.mb.un.varReadLA;
        la->eventTag = acqe_link->event_tag;
        la->attType = att_type;
        la->UlnkSpeed = lpfc_sli4_parse_latt_link_speed(phba, acqe_link);

        /* Fake the the following irrelvant fields */
        la->topology = TOPOLOGY_PT_PT;
        la->granted_AL_PA = 0;
        la->il = 0;
        la->pb = 0;
        la->fa = 0;
        la->mm = 0;

        /* Keep the link status for extra SLI4 state machine reference */
        phba->sli4_hba.link_state.speed =
                                bf_get(lpfc_acqe_link_speed, acqe_link);
        phba->sli4_hba.link_state.duplex =
                                bf_get(lpfc_acqe_link_duplex, acqe_link);
        phba->sli4_hba.link_state.status =
                                bf_get(lpfc_acqe_link_status, acqe_link);
        phba->sli4_hba.link_state.physical =
                                bf_get(lpfc_acqe_link_physical, acqe_link);
        phba->sli4_hba.link_state.fault =
                                bf_get(lpfc_acqe_link_fault, acqe_link);
        phba->sli4_hba.link_state.logical_speed =
                                bf_get(lpfc_acqe_qos_link_speed, acqe_link);

        /* Invoke the lpfc_handle_latt mailbox command callback function */
        lpfc_mbx_cmpl_read_la(phba, pmb);

        return;

out_free_dmabuf:
        kfree(mp);
out_free_pmb:
        mempool_free(pmb, phba->mbox_mem_pool);
}

/**
 * lpfc_sli4_async_fcoe_evt - Process the asynchronous fcoe event
 * @phba: pointer to lpfc hba data structure.
 * @acqe_link: pointer to the async fcoe completion queue entry.
 *
 * This routine is to handle the SLI4 asynchronous fcoe event.
 **/
static void
lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                         struct lpfc_acqe_fcoe *acqe_fcoe)
{
        uint8_t event_type = bf_get(lpfc_acqe_fcoe_event_type, acqe_fcoe);
        int rc;
        struct lpfc_vport *vport;
        struct lpfc_nodelist *ndlp;
        struct Scsi_Host  *shost;
        uint32_t link_state;
        int active_vlink_present;
        struct lpfc_vport **vports;
        int i;

        phba->fc_eventTag = acqe_fcoe->event_tag;
        phba->fcoe_eventtag = acqe_fcoe->event_tag;
        switch (event_type) {
        case LPFC_FCOE_EVENT_TYPE_NEW_FCF:
        case LPFC_FCOE_EVENT_TYPE_FCF_PARAM_MOD:
                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                        "2546 New FCF found index 0x%x tag 0x%x\n",
                        acqe_fcoe->index,
                        acqe_fcoe->event_tag);
                spin_lock_irq(&phba->hbalock);
                if ((phba->fcf.fcf_flag & FCF_SCAN_DONE) ||
                    (phba->hba_flag & FCF_DISC_INPROGRESS)) {
                        /*
                         * If the current FCF is in discovered state or
                         * FCF discovery is in progress, do nothing.
                         */
                        spin_unlock_irq(&phba->hbalock);
                        break;
                }
                if (phba->fcf.fcf_flag & FCF_REDISC_EVT) {
                        /*
                         * If fast FCF failover rescan event is pending,
                         * do nothing.
                         */
                        spin_unlock_irq(&phba->hbalock);
                        break;
                }
                spin_unlock_irq(&phba->hbalock);

                /* Read the FCF table and re-discover SAN. */
                rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
                if (rc)
                        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                                        "2547 Read FCF record failed 0x%x\n",
                                        rc);
                break;

        case LPFC_FCOE_EVENT_TYPE_FCF_TABLE_FULL:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "2548 FCF Table full count 0x%x tag 0x%x\n",
                        bf_get(lpfc_acqe_fcoe_fcf_count, acqe_fcoe),
                        acqe_fcoe->event_tag);
                break;

        case LPFC_FCOE_EVENT_TYPE_FCF_DEAD:
                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                        "2549 FCF disconnected from network index 0x%x"
                        " tag 0x%x\n", acqe_fcoe->index,
                        acqe_fcoe->event_tag);
                /* If the event is not for currently used fcf do nothing */
                if (phba->fcf.current_rec.fcf_indx != acqe_fcoe->index)
                        break;
                /*
                 * Currently, driver support only one FCF - so treat this as
                 * a link down, but save the link state because we don't want
                 * it to be changed to Link Down unless it is already down.
                 */
                link_state = phba->link_state;
                lpfc_linkdown(phba);
                phba->link_state = link_state;
                /* Unregister FCF if no devices connected to it */
                lpfc_unregister_unused_fcf(phba);
                break;
        case LPFC_FCOE_EVENT_TYPE_CVL:
                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                        "2718 Clear Virtual Link Received for VPI 0x%x"
                        " tag 0x%x\n", acqe_fcoe->index, acqe_fcoe->event_tag);
                vport = lpfc_find_vport_by_vpid(phba,
                                acqe_fcoe->index - phba->vpi_base);
                if (!vport)
                        break;
                ndlp = lpfc_findnode_did(vport, Fabric_DID);
                if (!ndlp)
                        break;
                shost = lpfc_shost_from_vport(vport);
                if (phba->pport->port_state <= LPFC_FLOGI)
                        break;
                /* If virtual link is not yet instantiated ignore CVL */
                if (vport->port_state <= LPFC_FDISC)
                        break;

                lpfc_linkdown_port(vport);
                lpfc_cleanup_pending_mbox(vport);
                spin_lock_irq(shost->host_lock);
                vport->fc_flag |= FC_VPORT_CVL_RCVD;
                spin_unlock_irq(shost->host_lock);
                active_vlink_present = 0;

                vports = lpfc_create_vport_work_array(phba);
                if (vports) {
                        for (i = 0; i <= phba->max_vports && vports[i] != NULL;
                                        i++) {
                                if ((!(vports[i]->fc_flag &
                                        FC_VPORT_CVL_RCVD)) &&
                                        (vports[i]->port_state > LPFC_FDISC)) {
                                        active_vlink_present = 1;
                                        break;
                                }
                        }
                        lpfc_destroy_vport_work_array(phba, vports);
                }

                if (active_vlink_present) {
                        /*
                         * If there are other active VLinks present,
                         * re-instantiate the Vlink using FDISC.
                         */
                        mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
                        spin_lock_irq(shost->host_lock);
                        ndlp->nlp_flag |= NLP_DELAY_TMO;
                        spin_unlock_irq(shost->host_lock);
                        ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
                        vport->port_state = LPFC_FDISC;
                } else {
                        /*
                         * Otherwise, we request port to rediscover
                         * the entire FCF table for a fast recovery
                         * from possible case that the current FCF
                         * is no longer valid.
                         */
                        rc = lpfc_sli4_redisc_fcf_table(phba);
                        if (rc)
                                /*
                                 * Last resort will be re-try on the
                                 * the current registered FCF entry.
                                 */
                                lpfc_retry_pport_discovery(phba);
                }
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "0288 Unknown FCoE event type 0x%x event tag "
                        "0x%x\n", event_type, acqe_fcoe->event_tag);
                break;
        }
}

/**
 * lpfc_sli4_async_dcbx_evt - Process the asynchronous dcbx event
 * @phba: pointer to lpfc hba data structure.
 * @acqe_link: pointer to the async dcbx completion queue entry.
 *
 * This routine is to handle the SLI4 asynchronous dcbx event.
 **/
static void
lpfc_sli4_async_dcbx_evt(struct lpfc_hba *phba,
                         struct lpfc_acqe_dcbx *acqe_dcbx)
{
        phba->fc_eventTag = acqe_dcbx->event_tag;
        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "0290 The SLI4 DCBX asynchronous event is not "
                        "handled yet\n");
}

/**
 * lpfc_sli4_async_event_proc - Process all the pending asynchronous event
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked by the worker thread to process all the pending
 * SLI4 asynchronous events.
 **/
void lpfc_sli4_async_event_proc(struct lpfc_hba *phba)
{
        struct lpfc_cq_event *cq_event;

        /* First, declare the async event has been handled */
        spin_lock_irq(&phba->hbalock);
        phba->hba_flag &= ~ASYNC_EVENT;
        spin_unlock_irq(&phba->hbalock);
        /* Now, handle all the async events */
        while (!list_empty(&phba->sli4_hba.sp_asynce_work_queue)) {
                /* Get the first event from the head of the event queue */
                spin_lock_irq(&phba->hbalock);
                list_remove_head(&phba->sli4_hba.sp_asynce_work_queue,
                                 cq_event, struct lpfc_cq_event, list);
                spin_unlock_irq(&phba->hbalock);
                /* Process the asynchronous event */
                switch (bf_get(lpfc_trailer_code, &cq_event->cqe.mcqe_cmpl)) {
                case LPFC_TRAILER_CODE_LINK:
                        lpfc_sli4_async_link_evt(phba,
                                                 &cq_event->cqe.acqe_link);
                        break;
                case LPFC_TRAILER_CODE_FCOE:
                        lpfc_sli4_async_fcoe_evt(phba,
                                                 &cq_event->cqe.acqe_fcoe);
                        break;
                case LPFC_TRAILER_CODE_DCBX:
                        lpfc_sli4_async_dcbx_evt(phba,
                                                 &cq_event->cqe.acqe_dcbx);
                        break;
                default:
                        lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                        "1804 Invalid asynchrous event code: "
                                        "x%x\n", bf_get(lpfc_trailer_code,
                                        &cq_event->cqe.mcqe_cmpl));
                        break;
                }
                /* Free the completion event processed to the free pool */
                lpfc_sli4_cq_event_release(phba, cq_event);
        }
}

/**
 * lpfc_sli4_fcf_redisc_event_proc - Process fcf table rediscovery event
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked by the worker thread to process FCF table
 * rediscovery pending completion event.
 **/
void lpfc_sli4_fcf_redisc_event_proc(struct lpfc_hba *phba)
{
        int rc;

        spin_lock_irq(&phba->hbalock);
        /* Clear FCF rediscovery timeout event */
        phba->fcf.fcf_flag &= ~FCF_REDISC_EVT;
        /* Clear driver fast failover FCF record flag */
        phba->fcf.failover_rec.flag = 0;
        /* Set state for FCF fast failover */
        phba->fcf.fcf_flag |= FCF_REDISC_FOV;
        spin_unlock_irq(&phba->hbalock);

        /* Scan FCF table from the first entry to re-discover SAN */
        rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
        if (rc)
                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                                "2747 Post FCF rediscovery read FCF record "
                                "failed 0x%x\n", rc);
}

/**
 * lpfc_api_table_setup - Set up per hba pci-device group func api jump table
 * @phba: pointer to lpfc hba data structure.
 * @dev_grp: The HBA PCI-Device group number.
 *
 * This routine is invoked to set up the per HBA PCI-Device group function
 * API jump table entries.
 *
 * Return: 0 if success, otherwise -ENODEV
 **/
int
lpfc_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
{
        int rc;

        /* Set up lpfc PCI-device group */
        phba->pci_dev_grp = dev_grp;

        /* The LPFC_PCI_DEV_OC uses SLI4 */
        if (dev_grp == LPFC_PCI_DEV_OC)
                phba->sli_rev = LPFC_SLI_REV4;

        /* Set up device INIT API function jump table */
        rc = lpfc_init_api_table_setup(phba, dev_grp);
        if (rc)
                return -ENODEV;
        /* Set up SCSI API function jump table */
        rc = lpfc_scsi_api_table_setup(phba, dev_grp);
        if (rc)
                return -ENODEV;
        /* Set up SLI API function jump table */
        rc = lpfc_sli_api_table_setup(phba, dev_grp);
        if (rc)
                return -ENODEV;
        /* Set up MBOX API function jump table */
        rc = lpfc_mbox_api_table_setup(phba, dev_grp);
        if (rc)
                return -ENODEV;

        return 0;
}

/**
 * lpfc_log_intr_mode - Log the active interrupt mode
 * @phba: pointer to lpfc hba data structure.
 * @intr_mode: active interrupt mode adopted.
 *
 * This routine it invoked to log the currently used active interrupt mode
 * to the device.
 **/
static void lpfc_log_intr_mode(struct lpfc_hba *phba, uint32_t intr_mode)
{
        switch (intr_mode) {
        case 0:
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0470 Enable INTx interrupt mode.\n");
                break;
        case 1:
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0481 Enabled MSI interrupt mode.\n");
                break;
        case 2:
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0480 Enabled MSI-X interrupt mode.\n");
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0482 Illegal interrupt mode.\n");
                break;
        }
        return;
}

/**
 * lpfc_enable_pci_dev - Enable a generic PCI device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to enable the PCI device that is common to all
 * PCI devices.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_enable_pci_dev(struct lpfc_hba *phba)
{
        struct pci_dev *pdev;
        int bars;

        /* Obtain PCI device reference */
        if (!phba->pcidev)
                goto out_error;
        else
                pdev = phba->pcidev;
        /* Select PCI BARs */
        bars = pci_select_bars(pdev, IORESOURCE_MEM);
        /* Enable PCI device */
        if (pci_enable_device_mem(pdev))
                goto out_error;
        /* Request PCI resource for the device */
        if (pci_request_selected_regions(pdev, bars, LPFC_DRIVER_NAME))
                goto out_disable_device;
        /* Set up device as PCI master and save state for EEH */
        pci_set_master(pdev);
        pci_try_set_mwi(pdev);
        pci_save_state(pdev);

        return 0;

out_disable_device:
        pci_disable_device(pdev);
out_error:
        return -ENODEV;
}

/**
 * lpfc_disable_pci_dev - Disable a generic PCI device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to disable the PCI device that is common to all
 * PCI devices.
 **/
static void
lpfc_disable_pci_dev(struct lpfc_hba *phba)
{
        struct pci_dev *pdev;
        int bars;

        /* Obtain PCI device reference */
        if (!phba->pcidev)
                return;
        else
                pdev = phba->pcidev;
        /* Select PCI BARs */
        bars = pci_select_bars(pdev, IORESOURCE_MEM);
        /* Release PCI resource and disable PCI device */
        pci_release_selected_regions(pdev, bars);
        pci_disable_device(pdev);
        /* Null out PCI private reference to driver */
        pci_set_drvdata(pdev, NULL);

        return;
}

/**
 * lpfc_reset_hba - Reset a hba
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to reset a hba device. It brings the HBA
 * offline, performs a board restart, and then brings the board back
 * online. The lpfc_offline calls lpfc_sli_hba_down which will clean up
 * on outstanding mailbox commands.
 **/
void
lpfc_reset_hba(struct lpfc_hba *phba)
{
        /* If resets are disabled then set error state and return. */
        if (!phba->cfg_enable_hba_reset) {
                phba->link_state = LPFC_HBA_ERROR;
                return;
        }
        lpfc_offline_prep(phba);
        lpfc_offline(phba);
        lpfc_sli_brdrestart(phba);
        lpfc_online(phba);
        lpfc_unblock_mgmt_io(phba);
}

/**
 * lpfc_sli_driver_resource_setup - Setup driver internal resources for SLI3 dev.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up the driver internal resources specific to
 * support the SLI-3 HBA device it attached to.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_sli_driver_resource_setup(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli;

        /*
         * Initialize timers used by driver
         */

        /* Heartbeat timer */
        init_timer(&phba->hb_tmofunc);
        phba->hb_tmofunc.function = lpfc_hb_timeout;
        phba->hb_tmofunc.data = (unsigned long)phba;

        psli = &phba->sli;
        /* MBOX heartbeat timer */
        init_timer(&psli->mbox_tmo);
        psli->mbox_tmo.function = lpfc_mbox_timeout;
        psli->mbox_tmo.data = (unsigned long) phba;
        /* FCP polling mode timer */
        init_timer(&phba->fcp_poll_timer);
        phba->fcp_poll_timer.function = lpfc_poll_timeout;
        phba->fcp_poll_timer.data = (unsigned long) phba;
        /* Fabric block timer */
        init_timer(&phba->fabric_block_timer);
        phba->fabric_block_timer.function = lpfc_fabric_block_timeout;
        phba->fabric_block_timer.data = (unsigned long) phba;
        /* EA polling mode timer */
        init_timer(&phba->eratt_poll);
        phba->eratt_poll.function = lpfc_poll_eratt;
        phba->eratt_poll.data = (unsigned long) phba;

        /* Host attention work mask setup */
        phba->work_ha_mask = (HA_ERATT | HA_MBATT | HA_LATT);
        phba->work_ha_mask |= (HA_RXMASK << (LPFC_ELS_RING * 4));

        /* Get all the module params for configuring this host */
        lpfc_get_cfgparam(phba);
        /*
         * Since the sg_tablesize is module parameter, the sg_dma_buf_size
         * used to create the sg_dma_buf_pool must be dynamically calculated.
         * 2 segments are added since the IOCB needs a command and response bde.
         */
        phba->cfg_sg_dma_buf_size = sizeof(struct fcp_cmnd) +
                sizeof(struct fcp_rsp) +
                        ((phba->cfg_sg_seg_cnt + 2) * sizeof(struct ulp_bde64));

        if (phba->cfg_enable_bg) {
                phba->cfg_sg_seg_cnt = LPFC_MAX_SG_SEG_CNT;
                phba->cfg_sg_dma_buf_size +=
                        phba->cfg_prot_sg_seg_cnt * sizeof(struct ulp_bde64);
        }

        /* Also reinitialize the host templates with new values. */
        lpfc_vport_template.sg_tablesize = phba->cfg_sg_seg_cnt;
        lpfc_template.sg_tablesize = phba->cfg_sg_seg_cnt;

        phba->max_vpi = LPFC_MAX_VPI;
        /* This will be set to correct value after config_port mbox */
        phba->max_vports = 0;

        /*
         * Initialize the SLI Layer to run with lpfc HBAs.
         */
        lpfc_sli_setup(phba);
        lpfc_sli_queue_setup(phba);

        /* Allocate device driver memory */
        if (lpfc_mem_alloc(phba, BPL_ALIGN_SZ))
                return -ENOMEM;

        return 0;
}

/**
 * lpfc_sli_driver_resource_unset - Unset drvr internal resources for SLI3 dev
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset the driver internal resources set up
 * specific for supporting the SLI-3 HBA device it attached to.
 **/
static void
lpfc_sli_driver_resource_unset(struct lpfc_hba *phba)
{
        /* Free device driver memory allocated */
        lpfc_mem_free_all(phba);

        return;
}

/**
 * lpfc_sli4_driver_resource_setup - Setup drvr internal resources for SLI4 dev
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up the driver internal resources specific to
 * support the SLI-4 HBA device it attached to.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli;
        LPFC_MBOXQ_t *mboxq;
        int rc, i, hbq_count, buf_size, dma_buf_size, max_buf_size;
        uint8_t pn_page[LPFC_MAX_SUPPORTED_PAGES] = {0};
        struct lpfc_mqe *mqe;

        /* Before proceed, wait for POST done and device ready */
        rc = lpfc_sli4_post_status_check(phba);
        if (rc)
                return -ENODEV;

        /*
         * Initialize timers used by driver
         */

        /* Heartbeat timer */
        init_timer(&phba->hb_tmofunc);
        phba->hb_tmofunc.function = lpfc_hb_timeout;
        phba->hb_tmofunc.data = (unsigned long)phba;

        psli = &phba->sli;
        /* MBOX heartbeat timer */
        init_timer(&psli->mbox_tmo);
        psli->mbox_tmo.function = lpfc_mbox_timeout;
        psli->mbox_tmo.data = (unsigned long) phba;
        /* Fabric block timer */
        init_timer(&phba->fabric_block_timer);
        phba->fabric_block_timer.function = lpfc_fabric_block_timeout;
        phba->fabric_block_timer.data = (unsigned long) phba;
        /* EA polling mode timer */
        init_timer(&phba->eratt_poll);
        phba->eratt_poll.function = lpfc_poll_eratt;
        phba->eratt_poll.data = (unsigned long) phba;
        /* FCF rediscover timer */
        init_timer(&phba->fcf.redisc_wait);
        phba->fcf.redisc_wait.function = lpfc_sli4_fcf_redisc_wait_tmo;
        phba->fcf.redisc_wait.data = (unsigned long)phba;

        /*
         * We need to do a READ_CONFIG mailbox command here before
         * calling lpfc_get_cfgparam. For VFs this will report the
         * MAX_XRI, MAX_VPI, MAX_RPI, MAX_IOCB, and MAX_VFI settings.
         * All of the resources allocated
         * for this Port are tied to these values.
         */
        /* Get all the module params for configuring this host */
        lpfc_get_cfgparam(phba);
        phba->max_vpi = LPFC_MAX_VPI;
        /* This will be set to correct value after the read_config mbox */
        phba->max_vports = 0;

        /* Program the default value of vlan_id and fc_map */
        phba->valid_vlan = 0;
        phba->fc_map[0] = LPFC_FCOE_FCF_MAP0;
        phba->fc_map[1] = LPFC_FCOE_FCF_MAP1;
        phba->fc_map[2] = LPFC_FCOE_FCF_MAP2;

        /*
         * Since the sg_tablesize is module parameter, the sg_dma_buf_size
         * used to create the sg_dma_buf_pool must be dynamically calculated.
         * 2 segments are added since the IOCB needs a command and response bde.
         * To insure that the scsi sgl does not cross a 4k page boundary only
         * sgl sizes of must be a power of 2.
         */
        buf_size = (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp) +
                    ((phba->cfg_sg_seg_cnt + 2) * sizeof(struct sli4_sge)));
        /* Feature Level 1 hardware is limited to 2 pages */
        if ((bf_get(lpfc_sli_intf_featurelevel1, &phba->sli4_hba.sli_intf) ==
             LPFC_SLI_INTF_FEATURELEVEL1_1))
                max_buf_size = LPFC_SLI4_FL1_MAX_BUF_SIZE;
        else
                max_buf_size = LPFC_SLI4_MAX_BUF_SIZE;
        for (dma_buf_size = LPFC_SLI4_MIN_BUF_SIZE;
             dma_buf_size < max_buf_size && buf_size > dma_buf_size;
             dma_buf_size = dma_buf_size << 1)
                ;
        if (dma_buf_size == max_buf_size)
                phba->cfg_sg_seg_cnt = (dma_buf_size -
                        sizeof(struct fcp_cmnd) - sizeof(struct fcp_rsp) -
                        (2 * sizeof(struct sli4_sge))) /
                                sizeof(struct sli4_sge);
        phba->cfg_sg_dma_buf_size = dma_buf_size;

        /* Initialize buffer queue management fields */
        hbq_count = lpfc_sli_hbq_count();
        for (i = 0; i < hbq_count; ++i)
                INIT_LIST_HEAD(&phba->hbqs[i].hbq_buffer_list);
        INIT_LIST_HEAD(&phba->rb_pend_list);
        phba->hbqs[LPFC_ELS_HBQ].hbq_alloc_buffer = lpfc_sli4_rb_alloc;
        phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer = lpfc_sli4_rb_free;

        /*
         * Initialize the SLI Layer to run with lpfc SLI4 HBAs.
         */
        /* Initialize the Abort scsi buffer list used by driver */
        spin_lock_init(&phba->sli4_hba.abts_scsi_buf_list_lock);
        INIT_LIST_HEAD(&phba->sli4_hba.lpfc_abts_scsi_buf_list);
        /* This abort list used by worker thread */
        spin_lock_init(&phba->sli4_hba.abts_sgl_list_lock);

        /*
         * Initialize dirver internal slow-path work queues
         */

        /* Driver internel slow-path CQ Event pool */
        INIT_LIST_HEAD(&phba->sli4_hba.sp_cqe_event_pool);
        /* Response IOCB work queue list */
        INIT_LIST_HEAD(&phba->sli4_hba.sp_queue_event);
        /* Asynchronous event CQ Event work queue list */
        INIT_LIST_HEAD(&phba->sli4_hba.sp_asynce_work_queue);
        /* Fast-path XRI aborted CQ Event work queue list */
        INIT_LIST_HEAD(&phba->sli4_hba.sp_fcp_xri_aborted_work_queue);
        /* Slow-path XRI aborted CQ Event work queue list */
        INIT_LIST_HEAD(&phba->sli4_hba.sp_els_xri_aborted_work_queue);
        /* Receive queue CQ Event work queue list */
        INIT_LIST_HEAD(&phba->sli4_hba.sp_unsol_work_queue);

        /* Initialize the driver internal SLI layer lists. */
        lpfc_sli_setup(phba);
        lpfc_sli_queue_setup(phba);

        /* Allocate device driver memory */
        rc = lpfc_mem_alloc(phba, SGL_ALIGN_SZ);
        if (rc)
                return -ENOMEM;

        /* Create the bootstrap mailbox command */
        rc = lpfc_create_bootstrap_mbox(phba);
        if (unlikely(rc))
                goto out_free_mem;

        /* Set up the host's endian order with the device. */
        rc = lpfc_setup_endian_order(phba);
        if (unlikely(rc))
                goto out_free_bsmbx;

        rc = lpfc_sli4_fw_cfg_check(phba);
        if (unlikely(rc))
                goto out_free_bsmbx;

        /* Set up the hba's configuration parameters. */
        rc = lpfc_sli4_read_config(phba);
        if (unlikely(rc))
                goto out_free_bsmbx;

        /* Perform a function reset */
        rc = lpfc_pci_function_reset(phba);
        if (unlikely(rc))
                goto out_free_bsmbx;

        /* Create all the SLI4 queues */
        rc = lpfc_sli4_queue_create(phba);
        if (rc)
                goto out_free_bsmbx;

        /* Create driver internal CQE event pool */
        rc = lpfc_sli4_cq_event_pool_create(phba);
        if (rc)
                goto out_destroy_queue;

        /* Initialize and populate the iocb list per host */
        rc = lpfc_init_sgl_list(phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1400 Failed to initialize sgl list.\n");
                goto out_destroy_cq_event_pool;
        }
        rc = lpfc_init_active_sgl_array(phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1430 Failed to initialize sgl list.\n");
                goto out_free_sgl_list;
        }

        rc = lpfc_sli4_init_rpi_hdrs(phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1432 Failed to initialize rpi headers.\n");
                goto out_free_active_sgl;
        }

        phba->sli4_hba.fcp_eq_hdl = kzalloc((sizeof(struct lpfc_fcp_eq_hdl) *
                                    phba->cfg_fcp_eq_count), GFP_KERNEL);
        if (!phba->sli4_hba.fcp_eq_hdl) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2572 Failed allocate memory for fast-path "
                                "per-EQ handle array\n");
                goto out_remove_rpi_hdrs;
        }

        phba->sli4_hba.msix_entries = kzalloc((sizeof(struct msix_entry) *
                                      phba->sli4_hba.cfg_eqn), GFP_KERNEL);
        if (!phba->sli4_hba.msix_entries) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2573 Failed allocate memory for msi-x "
                                "interrupt vector entries\n");
                goto out_free_fcp_eq_hdl;
        }

        mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
                                                       GFP_KERNEL);
        if (!mboxq) {
                rc = -ENOMEM;
                goto out_free_fcp_eq_hdl;
        }

        /* Get the Supported Pages. It is always available. */
        lpfc_supported_pages(mboxq);
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        if (unlikely(rc)) {
                rc = -EIO;
                mempool_free(mboxq, phba->mbox_mem_pool);
                goto out_free_fcp_eq_hdl;
        }

        mqe = &mboxq->u.mqe;
        memcpy(&pn_page[0], ((uint8_t *)&mqe->un.supp_pages.word3),
               LPFC_MAX_SUPPORTED_PAGES);
        for (i = 0; i < LPFC_MAX_SUPPORTED_PAGES; i++) {
                switch (pn_page[i]) {
                case LPFC_SLI4_PARAMETERS:
                        phba->sli4_hba.pc_sli4_params.supported = 1;
                        break;
                default:
                        break;
                }
        }

        /* Read the port's SLI4 Parameters capabilities if supported. */
        if (phba->sli4_hba.pc_sli4_params.supported)
                rc = lpfc_pc_sli4_params_get(phba, mboxq);
        mempool_free(mboxq, phba->mbox_mem_pool);
        if (rc) {
                rc = -EIO;
                goto out_free_fcp_eq_hdl;
        }
        return rc;

out_free_fcp_eq_hdl:
        kfree(phba->sli4_hba.fcp_eq_hdl);
out_remove_rpi_hdrs:
        lpfc_sli4_remove_rpi_hdrs(phba);
out_free_active_sgl:
        lpfc_free_active_sgl(phba);
out_free_sgl_list:
        lpfc_free_sgl_list(phba);
out_destroy_cq_event_pool:
        lpfc_sli4_cq_event_pool_destroy(phba);
out_destroy_queue:
        lpfc_sli4_queue_destroy(phba);
out_free_bsmbx:
        lpfc_destroy_bootstrap_mbox(phba);
out_free_mem:
        lpfc_mem_free(phba);
        return rc;
}

/**
 * lpfc_sli4_driver_resource_unset - Unset drvr internal resources for SLI4 dev
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset the driver internal resources set up
 * specific for supporting the SLI-4 HBA device it attached to.
 **/
static void
lpfc_sli4_driver_resource_unset(struct lpfc_hba *phba)
{
        struct lpfc_fcf_conn_entry *conn_entry, *next_conn_entry;

        /* unregister default FCFI from the HBA */
        lpfc_sli4_fcfi_unreg(phba, phba->fcf.fcfi);

        /* Free the default FCR table */
        lpfc_sli_remove_dflt_fcf(phba);

        /* Free memory allocated for msi-x interrupt vector entries */
        kfree(phba->sli4_hba.msix_entries);

        /* Free memory allocated for fast-path work queue handles */
        kfree(phba->sli4_hba.fcp_eq_hdl);

        /* Free the allocated rpi headers. */
        lpfc_sli4_remove_rpi_hdrs(phba);
        lpfc_sli4_remove_rpis(phba);

        /* Free the ELS sgl list */
        lpfc_free_active_sgl(phba);
        lpfc_free_sgl_list(phba);

        /* Free the SCSI sgl management array */
        kfree(phba->sli4_hba.lpfc_scsi_psb_array);

        /* Free the SLI4 queues */
        lpfc_sli4_queue_destroy(phba);

        /* Free the completion queue EQ event pool */
        lpfc_sli4_cq_event_release_all(phba);
        lpfc_sli4_cq_event_pool_destroy(phba);

        /* Reset SLI4 HBA FCoE function */
        lpfc_pci_function_reset(phba);

        /* Free the bsmbx region. */
        lpfc_destroy_bootstrap_mbox(phba);

        /* Free the SLI Layer memory with SLI4 HBAs */
        lpfc_mem_free_all(phba);

        /* Free the current connect table */
        list_for_each_entry_safe(conn_entry, next_conn_entry,
                &phba->fcf_conn_rec_list, list) {
                list_del_init(&conn_entry->list);
                kfree(conn_entry);
        }

        return;
}

/**
 * lpfc_init_api_table_setup - Set up init api fucntion jump table
 * @phba: The hba struct for which this call is being executed.
 * @dev_grp: The HBA PCI-Device group number.
 *
 * This routine sets up the device INIT interface API function jump table
 * in @phba struct.
 *
 * Returns: 0 - success, -ENODEV - failure.
 **/
int
lpfc_init_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
{
        phba->lpfc_hba_init_link = lpfc_hba_init_link;
        phba->lpfc_hba_down_link = lpfc_hba_down_link;
        switch (dev_grp) {
        case LPFC_PCI_DEV_LP:
                phba->lpfc_hba_down_post = lpfc_hba_down_post_s3;
                phba->lpfc_handle_eratt = lpfc_handle_eratt_s3;
                phba->lpfc_stop_port = lpfc_stop_port_s3;
                break;
        case LPFC_PCI_DEV_OC:
                phba->lpfc_hba_down_post = lpfc_hba_down_post_s4;
                phba->lpfc_handle_eratt = lpfc_handle_eratt_s4;
                phba->lpfc_stop_port = lpfc_stop_port_s4;
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1431 Invalid HBA PCI-device group: 0x%x\n",
                                dev_grp);
                return -ENODEV;
                break;
        }
        return 0;
}

/**
 * lpfc_setup_driver_resource_phase1 - Phase1 etup driver internal resources.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up the driver internal resources before the
 * device specific resource setup to support the HBA device it attached to.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_setup_driver_resource_phase1(struct lpfc_hba *phba)
{
        /*
         * Driver resources common to all SLI revisions
         */
        atomic_set(&phba->fast_event_count, 0);
        spin_lock_init(&phba->hbalock);

        /* Initialize ndlp management spinlock */
        spin_lock_init(&phba->ndlp_lock);

        INIT_LIST_HEAD(&phba->port_list);
        INIT_LIST_HEAD(&phba->work_list);
        init_waitqueue_head(&phba->wait_4_mlo_m_q);

        /* Initialize the wait queue head for the kernel thread */
        init_waitqueue_head(&phba->work_waitq);

        /* Initialize the scsi buffer list used by driver for scsi IO */
        spin_lock_init(&phba->scsi_buf_list_lock);
        INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list);

        /* Initialize the fabric iocb list */
        INIT_LIST_HEAD(&phba->fabric_iocb_list);

        /* Initialize list to save ELS buffers */
        INIT_LIST_HEAD(&phba->elsbuf);

        /* Initialize FCF connection rec list */
        INIT_LIST_HEAD(&phba->fcf_conn_rec_list);

        return 0;
}

/**
 * lpfc_setup_driver_resource_phase2 - Phase2 setup driver internal resources.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up the driver internal resources after the
 * device specific resource setup to support the HBA device it attached to.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_setup_driver_resource_phase2(struct lpfc_hba *phba)
{
        int error;

        /* Startup the kernel thread for this host adapter. */
        phba->worker_thread = kthread_run(lpfc_do_work, phba,
                                          "lpfc_worker_%d", phba->brd_no);
        if (IS_ERR(phba->worker_thread)) {
                error = PTR_ERR(phba->worker_thread);
                return error;
        }

        return 0;
}

/**
 * lpfc_unset_driver_resource_phase2 - Phase2 unset driver internal resources.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset the driver internal resources set up after
 * the device specific resource setup for supporting the HBA device it
 * attached to.
 **/
static void
lpfc_unset_driver_resource_phase2(struct lpfc_hba *phba)
{
        /* Stop kernel worker thread */
        kthread_stop(phba->worker_thread);
}

/**
 * lpfc_free_iocb_list - Free iocb list.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to free the driver's IOCB list and memory.
 **/
static void
lpfc_free_iocb_list(struct lpfc_hba *phba)
{
        struct lpfc_iocbq *iocbq_entry = NULL, *iocbq_next = NULL;

        spin_lock_irq(&phba->hbalock);
        list_for_each_entry_safe(iocbq_entry, iocbq_next,
                                 &phba->lpfc_iocb_list, list) {
                list_del(&iocbq_entry->list);
                kfree(iocbq_entry);
                phba->total_iocbq_bufs--;
        }
        spin_unlock_irq(&phba->hbalock);

        return;
}

/**
 * lpfc_init_iocb_list - Allocate and initialize iocb list.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to allocate and initizlize the driver's IOCB
 * list and set up the IOCB tag array accordingly.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_init_iocb_list(struct lpfc_hba *phba, int iocb_count)
{
        struct lpfc_iocbq *iocbq_entry = NULL;
        uint16_t iotag;
        int i;

        /* Initialize and populate the iocb list per host.  */
        INIT_LIST_HEAD(&phba->lpfc_iocb_list);
        for (i = 0; i < iocb_count; i++) {
                iocbq_entry = kzalloc(sizeof(struct lpfc_iocbq), GFP_KERNEL);
                if (iocbq_entry == NULL) {
                        printk(KERN_ERR "%s: only allocated %d iocbs of "
                                "expected %d count. Unloading driver.\n",
                                __func__, i, LPFC_IOCB_LIST_CNT);
                        goto out_free_iocbq;
                }

                iotag = lpfc_sli_next_iotag(phba, iocbq_entry);
                if (iotag == 0) {
                        kfree(iocbq_entry);
                        printk(KERN_ERR "%s: failed to allocate IOTAG. "
                                "Unloading driver.\n", __func__);
                        goto out_free_iocbq;
                }
                iocbq_entry->sli4_xritag = NO_XRI;

                spin_lock_irq(&phba->hbalock);
                list_add(&iocbq_entry->list, &phba->lpfc_iocb_list);
                phba->total_iocbq_bufs++;
                spin_unlock_irq(&phba->hbalock);
        }

        return 0;

out_free_iocbq:
        lpfc_free_iocb_list(phba);

        return -ENOMEM;
}

/**
 * lpfc_free_sgl_list - Free sgl list.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to free the driver's sgl list and memory.
 **/
static void
lpfc_free_sgl_list(struct lpfc_hba *phba)
{
        struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
        LIST_HEAD(sglq_list);
        int rc = 0;

        spin_lock_irq(&phba->hbalock);
        list_splice_init(&phba->sli4_hba.lpfc_sgl_list, &sglq_list);
        spin_unlock_irq(&phba->hbalock);

        list_for_each_entry_safe(sglq_entry, sglq_next,
                                 &sglq_list, list) {
                list_del(&sglq_entry->list);
                lpfc_mbuf_free(phba, sglq_entry->virt, sglq_entry->phys);
                kfree(sglq_entry);
                phba->sli4_hba.total_sglq_bufs--;
        }
        rc = lpfc_sli4_remove_all_sgl_pages(phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "2005 Unable to deregister pages from HBA: %x\n", rc);
        }
        kfree(phba->sli4_hba.lpfc_els_sgl_array);
}

/**
 * lpfc_init_active_sgl_array - Allocate the buf to track active ELS XRIs.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to allocate the driver's active sgl memory.
 * This array will hold the sglq_entry's for active IOs.
 **/
static int
lpfc_init_active_sgl_array(struct lpfc_hba *phba)
{
        int size;
        size = sizeof(struct lpfc_sglq *);
        size *= phba->sli4_hba.max_cfg_param.max_xri;

        phba->sli4_hba.lpfc_sglq_active_list =
                kzalloc(size, GFP_KERNEL);
        if (!phba->sli4_hba.lpfc_sglq_active_list)
                return -ENOMEM;
        return 0;
}

/**
 * lpfc_free_active_sgl - Free the buf that tracks active ELS XRIs.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to walk through the array of active sglq entries
 * and free all of the resources.
 * This is just a place holder for now.
 **/
static void
lpfc_free_active_sgl(struct lpfc_hba *phba)
{
        kfree(phba->sli4_hba.lpfc_sglq_active_list);
}

/**
 * lpfc_init_sgl_list - Allocate and initialize sgl list.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to allocate and initizlize the driver's sgl
 * list and set up the sgl xritag tag array accordingly.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_init_sgl_list(struct lpfc_hba *phba)
{
        struct lpfc_sglq *sglq_entry = NULL;
        int i;
        int els_xri_cnt;

        els_xri_cnt = lpfc_sli4_get_els_iocb_cnt(phba);
        lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                                "2400 lpfc_init_sgl_list els %d.\n",
                                els_xri_cnt);
        /* Initialize and populate the sglq list per host/VF. */
        INIT_LIST_HEAD(&phba->sli4_hba.lpfc_sgl_list);
        INIT_LIST_HEAD(&phba->sli4_hba.lpfc_abts_els_sgl_list);

        /* Sanity check on XRI management */
        if (phba->sli4_hba.max_cfg_param.max_xri <= els_xri_cnt) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2562 No room left for SCSI XRI allocation: "
                                "max_xri=%d, els_xri=%d\n",
                                phba->sli4_hba.max_cfg_param.max_xri,
                                els_xri_cnt);
                return -ENOMEM;
        }

        /* Allocate memory for the ELS XRI management array */
        phba->sli4_hba.lpfc_els_sgl_array =
                        kzalloc((sizeof(struct lpfc_sglq *) * els_xri_cnt),
                        GFP_KERNEL);

        if (!phba->sli4_hba.lpfc_els_sgl_array) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2401 Failed to allocate memory for ELS "
                                "XRI management array of size %d.\n",
                                els_xri_cnt);
                return -ENOMEM;
        }

        /* Keep the SCSI XRI into the XRI management array */
        phba->sli4_hba.scsi_xri_max =
                        phba->sli4_hba.max_cfg_param.max_xri - els_xri_cnt;
        phba->sli4_hba.scsi_xri_cnt = 0;

        phba->sli4_hba.lpfc_scsi_psb_array =
                        kzalloc((sizeof(struct lpfc_scsi_buf *) *
                        phba->sli4_hba.scsi_xri_max), GFP_KERNEL);

        if (!phba->sli4_hba.lpfc_scsi_psb_array) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2563 Failed to allocate memory for SCSI "
                                "XRI management array of size %d.\n",
                                phba->sli4_hba.scsi_xri_max);
                kfree(phba->sli4_hba.lpfc_els_sgl_array);
                return -ENOMEM;
        }

        for (i = 0; i < els_xri_cnt; i++) {
                sglq_entry = kzalloc(sizeof(struct lpfc_sglq), GFP_KERNEL);
                if (sglq_entry == NULL) {
                        printk(KERN_ERR "%s: only allocated %d sgls of "
                                "expected %d count. Unloading driver.\n",
                                __func__, i, els_xri_cnt);
                        goto out_free_mem;
                }

                sglq_entry->sli4_xritag = lpfc_sli4_next_xritag(phba);
                if (sglq_entry->sli4_xritag == NO_XRI) {
                        kfree(sglq_entry);
                        printk(KERN_ERR "%s: failed to allocate XRI.\n"
                                "Unloading driver.\n", __func__);
                        goto out_free_mem;
                }
                sglq_entry->buff_type = GEN_BUFF_TYPE;
                sglq_entry->virt = lpfc_mbuf_alloc(phba, 0, &sglq_entry->phys);
                if (sglq_entry->virt == NULL) {
                        kfree(sglq_entry);
                        printk(KERN_ERR "%s: failed to allocate mbuf.\n"
                                "Unloading driver.\n", __func__);
                        goto out_free_mem;
                }
                sglq_entry->sgl = sglq_entry->virt;
                memset(sglq_entry->sgl, 0, LPFC_BPL_SIZE);

                /* The list order is used by later block SGL registraton */
                spin_lock_irq(&phba->hbalock);
                list_add_tail(&sglq_entry->list, &phba->sli4_hba.lpfc_sgl_list);
                phba->sli4_hba.lpfc_els_sgl_array[i] = sglq_entry;
                phba->sli4_hba.total_sglq_bufs++;
                spin_unlock_irq(&phba->hbalock);
        }
        return 0;

out_free_mem:
        kfree(phba->sli4_hba.lpfc_scsi_psb_array);
        lpfc_free_sgl_list(phba);
        return -ENOMEM;
}

/**
 * lpfc_sli4_init_rpi_hdrs - Post the rpi header memory region to the port
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to post rpi header templates to the
 * HBA consistent with the SLI-4 interface spec.  This routine
 * posts a PAGE_SIZE memory region to the port to hold up to
 * PAGE_SIZE modulo 64 rpi context headers.
 * No locks are held here because this is an initialization routine
 * called only from probe or lpfc_online when interrupts are not
 * enabled and the driver is reinitializing the device.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
int
lpfc_sli4_init_rpi_hdrs(struct lpfc_hba *phba)
{
        int rc = 0;
        int longs;
        uint16_t rpi_count;
        struct lpfc_rpi_hdr *rpi_hdr;

        INIT_LIST_HEAD(&phba->sli4_hba.lpfc_rpi_hdr_list);

        /*
         * Provision an rpi bitmask range for discovery. The total count
         * is the difference between max and base + 1.
         */
        rpi_count = phba->sli4_hba.max_cfg_param.rpi_base +
                    phba->sli4_hba.max_cfg_param.max_rpi - 1;

        longs = ((rpi_count) + BITS_PER_LONG - 1) / BITS_PER_LONG;
        phba->sli4_hba.rpi_bmask = kzalloc(longs * sizeof(unsigned long),
                                           GFP_KERNEL);
        if (!phba->sli4_hba.rpi_bmask)
                return -ENOMEM;

        rpi_hdr = lpfc_sli4_create_rpi_hdr(phba);
        if (!rpi_hdr) {
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                "0391 Error during rpi post operation\n");
                lpfc_sli4_remove_rpis(phba);
                rc = -ENODEV;
        }

        return rc;
}

/**
 * lpfc_sli4_create_rpi_hdr - Allocate an rpi header memory region
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to allocate a single 4KB memory region to
 * support rpis and stores them in the phba.  This single region
 * provides support for up to 64 rpis.  The region is used globally
 * by the device.
 *
 * Returns:
 *   A valid rpi hdr on success.
 *   A NULL pointer on any failure.
 **/
struct lpfc_rpi_hdr *
lpfc_sli4_create_rpi_hdr(struct lpfc_hba *phba)
{
        uint16_t rpi_limit, curr_rpi_range;
        struct lpfc_dmabuf *dmabuf;
        struct lpfc_rpi_hdr *rpi_hdr;

        rpi_limit = phba->sli4_hba.max_cfg_param.rpi_base +
                    phba->sli4_hba.max_cfg_param.max_rpi - 1;

        spin_lock_irq(&phba->hbalock);
        curr_rpi_range = phba->sli4_hba.next_rpi;
        spin_unlock_irq(&phba->hbalock);

        /*
         * The port has a limited number of rpis. The increment here
         * is LPFC_RPI_HDR_COUNT - 1 to account for the starting value
         * and to allow the full max_rpi range per port.
         */
        if ((curr_rpi_range + (LPFC_RPI_HDR_COUNT - 1)) > rpi_limit)
                return NULL;

        /*
         * First allocate the protocol header region for the port.  The
         * port expects a 4KB DMA-mapped memory region that is 4K aligned.
         */
        dmabuf = kzalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
        if (!dmabuf)
                return NULL;

        dmabuf->virt = dma_alloc_coherent(&phba->pcidev->dev,
                                          LPFC_HDR_TEMPLATE_SIZE,
                                          &dmabuf->phys,
                                          GFP_KERNEL);
        if (!dmabuf->virt) {
                rpi_hdr = NULL;
                goto err_free_dmabuf;
        }

        memset(dmabuf->virt, 0, LPFC_HDR_TEMPLATE_SIZE);
        if (!IS_ALIGNED(dmabuf->phys, LPFC_HDR_TEMPLATE_SIZE)) {
                rpi_hdr = NULL;
                goto err_free_coherent;
        }

        /* Save the rpi header data for cleanup later. */
        rpi_hdr = kzalloc(sizeof(struct lpfc_rpi_hdr), GFP_KERNEL);
        if (!rpi_hdr)
                goto err_free_coherent;

        rpi_hdr->dmabuf = dmabuf;
        rpi_hdr->len = LPFC_HDR_TEMPLATE_SIZE;
        rpi_hdr->page_count = 1;
        spin_lock_irq(&phba->hbalock);
        rpi_hdr->start_rpi = phba->sli4_hba.next_rpi;
        list_add_tail(&rpi_hdr->list, &phba->sli4_hba.lpfc_rpi_hdr_list);

        /*
         * The next_rpi stores the next module-64 rpi value to post
         * in any subsequent rpi memory region postings.
         */
        phba->sli4_hba.next_rpi += LPFC_RPI_HDR_COUNT;
        spin_unlock_irq(&phba->hbalock);
        return rpi_hdr;

 err_free_coherent:
        dma_free_coherent(&phba->pcidev->dev, LPFC_HDR_TEMPLATE_SIZE,
                          dmabuf->virt, dmabuf->phys);
 err_free_dmabuf:
        kfree(dmabuf);
        return NULL;
}

/**
 * lpfc_sli4_remove_rpi_hdrs - Remove all rpi header memory regions
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to remove all memory resources allocated
 * to support rpis. This routine presumes the caller has released all
 * rpis consumed by fabric or port logins and is prepared to have
 * the header pages removed.
 **/
void
lpfc_sli4_remove_rpi_hdrs(struct lpfc_hba *phba)
{
        struct lpfc_rpi_hdr *rpi_hdr, *next_rpi_hdr;

        list_for_each_entry_safe(rpi_hdr, next_rpi_hdr,
                                 &phba->sli4_hba.lpfc_rpi_hdr_list, list) {
                list_del(&rpi_hdr->list);
                dma_free_coherent(&phba->pcidev->dev, rpi_hdr->len,
                                  rpi_hdr->dmabuf->virt, rpi_hdr->dmabuf->phys);
                kfree(rpi_hdr->dmabuf);
                kfree(rpi_hdr);
        }

        phba->sli4_hba.next_rpi = phba->sli4_hba.max_cfg_param.rpi_base;
        memset(phba->sli4_hba.rpi_bmask, 0, sizeof(*phba->sli4_hba.rpi_bmask));
}

/**
 * lpfc_hba_alloc - Allocate driver hba data structure for a device.
 * @pdev: pointer to pci device data structure.
 *
 * This routine is invoked to allocate the driver hba data structure for an
 * HBA device. If the allocation is successful, the phba reference to the
 * PCI device data structure is set.
 *
 * Return codes
 *      pointer to @phba - successful
 *      NULL - error
 **/
static struct lpfc_hba *
lpfc_hba_alloc(struct pci_dev *pdev)
{
        struct lpfc_hba *phba;

        /* Allocate memory for HBA structure */
        phba = kzalloc(sizeof(struct lpfc_hba), GFP_KERNEL);
        if (!phba) {
                dev_err(&pdev->dev, "failed to allocate hba struct\n");
                return NULL;
        }

        /* Set reference to PCI device in HBA structure */
        phba->pcidev = pdev;

        /* Assign an unused board number */
        phba->brd_no = lpfc_get_instance();
        if (phba->brd_no < 0) {
                kfree(phba);
                return NULL;
        }

        spin_lock_init(&phba->ct_ev_lock);
        INIT_LIST_HEAD(&phba->ct_ev_waiters);

        return phba;
}

/**
 * lpfc_hba_free - Free driver hba data structure with a device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to free the driver hba data structure with an
 * HBA device.
 **/
static void
lpfc_hba_free(struct lpfc_hba *phba)
{
        /* Release the driver assigned board number */
        idr_remove(&lpfc_hba_index, phba->brd_no);

        kfree(phba);
        return;
}

/**
 * lpfc_create_shost - Create hba physical port with associated scsi host.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to create HBA physical port and associate a SCSI
 * host with it.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_create_shost(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport;
        struct Scsi_Host  *shost;

        /* Initialize HBA FC structure */
        phba->fc_edtov = FF_DEF_EDTOV;
        phba->fc_ratov = FF_DEF_RATOV;
        phba->fc_altov = FF_DEF_ALTOV;
        phba->fc_arbtov = FF_DEF_ARBTOV;

        vport = lpfc_create_port(phba, phba->brd_no, &phba->pcidev->dev);
        if (!vport)
                return -ENODEV;

        shost = lpfc_shost_from_vport(vport);
        phba->pport = vport;
        lpfc_debugfs_initialize(vport);
        /* Put reference to SCSI host to driver's device private data */
        pci_set_drvdata(phba->pcidev, shost);

        return 0;
}

/**
 * lpfc_destroy_shost - Destroy hba physical port with associated scsi host.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to destroy HBA physical port and the associated
 * SCSI host.
 **/
static void
lpfc_destroy_shost(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;

        /* Destroy physical port that associated with the SCSI host */
        destroy_port(vport);

        return;
}

/**
 * lpfc_setup_bg - Setup Block guard structures and debug areas.
 * @phba: pointer to lpfc hba data structure.
 * @shost: the shost to be used to detect Block guard settings.
 *
 * This routine sets up the local Block guard protocol settings for @shost.
 * This routine also allocates memory for debugging bg buffers.
 **/
static void
lpfc_setup_bg(struct lpfc_hba *phba, struct Scsi_Host *shost)
{
        int pagecnt = 10;
        if (lpfc_prot_mask && lpfc_prot_guard) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "1478 Registering BlockGuard with the "
                                "SCSI layer\n");
                scsi_host_set_prot(shost, lpfc_prot_mask);
                scsi_host_set_guard(shost, lpfc_prot_guard);
        }
        if (!_dump_buf_data) {
                while (pagecnt) {
                        spin_lock_init(&_dump_buf_lock);
                        _dump_buf_data =
                                (char *) __get_free_pages(GFP_KERNEL, pagecnt);
                        if (_dump_buf_data) {
                                lpfc_printf_log(phba, KERN_ERR, LOG_BG,
                                        "9043 BLKGRD: allocated %d pages for "
                                       "_dump_buf_data at 0x%p\n",
                                       (1 << pagecnt), _dump_buf_data);
                                _dump_buf_data_order = pagecnt;
                                memset(_dump_buf_data, 0,
                                       ((1 << PAGE_SHIFT) << pagecnt));
                                break;
                        } else
                                --pagecnt;
                }
                if (!_dump_buf_data_order)
                        lpfc_printf_log(phba, KERN_ERR, LOG_BG,
                                "9044 BLKGRD: ERROR unable to allocate "
                               "memory for hexdump\n");
        } else
                lpfc_printf_log(phba, KERN_ERR, LOG_BG,
                        "9045 BLKGRD: already allocated _dump_buf_data=0x%p"
                       "\n", _dump_buf_data);
        if (!_dump_buf_dif) {
                while (pagecnt) {
                        _dump_buf_dif =
                                (char *) __get_free_pages(GFP_KERNEL, pagecnt);
                        if (_dump_buf_dif) {
                                lpfc_printf_log(phba, KERN_ERR, LOG_BG,
                                        "9046 BLKGRD: allocated %d pages for "
                                       "_dump_buf_dif at 0x%p\n",
                                       (1 << pagecnt), _dump_buf_dif);
                                _dump_buf_dif_order = pagecnt;
                                memset(_dump_buf_dif, 0,
                                       ((1 << PAGE_SHIFT) << pagecnt));
                                break;
                        } else
                                --pagecnt;
                }
                if (!_dump_buf_dif_order)
                        lpfc_printf_log(phba, KERN_ERR, LOG_BG,
                        "9047 BLKGRD: ERROR unable to allocate "
                               "memory for hexdump\n");
        } else
                lpfc_printf_log(phba, KERN_ERR, LOG_BG,
                        "9048 BLKGRD: already allocated _dump_buf_dif=0x%p\n",
                       _dump_buf_dif);
}

/**
 * lpfc_post_init_setup - Perform necessary device post initialization setup.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to perform all the necessary post initialization
 * setup for the device.
 **/
static void
lpfc_post_init_setup(struct lpfc_hba *phba)
{
        struct Scsi_Host  *shost;
        struct lpfc_adapter_event_header adapter_event;

        /* Get the default values for Model Name and Description */
        lpfc_get_hba_model_desc(phba, phba->ModelName, phba->ModelDesc);

        /*
         * hba setup may have changed the hba_queue_depth so we need to
         * adjust the value of can_queue.
         */
        shost = pci_get_drvdata(phba->pcidev);
        shost->can_queue = phba->cfg_hba_queue_depth - 10;
        if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
                lpfc_setup_bg(phba, shost);

        lpfc_host_attrib_init(shost);

        if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
                spin_lock_irq(shost->host_lock);
                lpfc_poll_start_timer(phba);
                spin_unlock_irq(shost->host_lock);
        }

        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0428 Perform SCSI scan\n");
        /* Send board arrival event to upper layer */
        adapter_event.event_type = FC_REG_ADAPTER_EVENT;
        adapter_event.subcategory = LPFC_EVENT_ARRIVAL;
        fc_host_post_vendor_event(shost, fc_get_event_number(),
                                  sizeof(adapter_event),
                                  (char *) &adapter_event,
                                  LPFC_NL_VENDOR_ID);
        return;
}

/**
 * lpfc_sli_pci_mem_setup - Setup SLI3 HBA PCI memory space.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up the PCI device memory space for device
 * with SLI-3 interface spec.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_sli_pci_mem_setup(struct lpfc_hba *phba)
{
        struct pci_dev *pdev;
        unsigned long bar0map_len, bar2map_len;
        int i, hbq_count;
        void *ptr;
        int error = -ENODEV;

        /* Obtain PCI device reference */
        if (!phba->pcidev)
                return error;
        else
                pdev = phba->pcidev;

        /* Set the device DMA mask size */
        if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0
         || pci_set_consistent_dma_mask(pdev,DMA_BIT_MASK(64)) != 0) {
                if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0
                 || pci_set_consistent_dma_mask(pdev,DMA_BIT_MASK(32)) != 0) {
                        return error;
                }
        }

        /* Get the bus address of Bar0 and Bar2 and the number of bytes
         * required by each mapping.
         */
        phba->pci_bar0_map = pci_resource_start(pdev, 0);
        bar0map_len = pci_resource_len(pdev, 0);

        phba->pci_bar2_map = pci_resource_start(pdev, 2);
        bar2map_len = pci_resource_len(pdev, 2);

        /* Map HBA SLIM to a kernel virtual address. */
        phba->slim_memmap_p = ioremap(phba->pci_bar0_map, bar0map_len);
        if (!phba->slim_memmap_p) {
                dev_printk(KERN_ERR, &pdev->dev,
                           "ioremap failed for SLIM memory.\n");
                goto out;
        }

        /* Map HBA Control Registers to a kernel virtual address. */
        phba->ctrl_regs_memmap_p = ioremap(phba->pci_bar2_map, bar2map_len);
        if (!phba->ctrl_regs_memmap_p) {
                dev_printk(KERN_ERR, &pdev->dev,
                           "ioremap failed for HBA control registers.\n");
                goto out_iounmap_slim;
        }

        /* Allocate memory for SLI-2 structures */
        phba->slim2p.virt = dma_alloc_coherent(&pdev->dev,
                                               SLI2_SLIM_SIZE,
                                               &phba->slim2p.phys,
                                               GFP_KERNEL);
        if (!phba->slim2p.virt)
                goto out_iounmap;

        memset(phba->slim2p.virt, 0, SLI2_SLIM_SIZE);
        phba->mbox = phba->slim2p.virt + offsetof(struct lpfc_sli2_slim, mbx);
        phba->pcb = (phba->slim2p.virt + offsetof(struct lpfc_sli2_slim, pcb));
        phba->IOCBs = (phba->slim2p.virt +
                       offsetof(struct lpfc_sli2_slim, IOCBs));

        phba->hbqslimp.virt = dma_alloc_coherent(&pdev->dev,
                                                 lpfc_sli_hbq_size(),
                                                 &phba->hbqslimp.phys,
                                                 GFP_KERNEL);
        if (!phba->hbqslimp.virt)
                goto out_free_slim;

        hbq_count = lpfc_sli_hbq_count();
        ptr = phba->hbqslimp.virt;
        for (i = 0; i < hbq_count; ++i) {
                phba->hbqs[i].hbq_virt = ptr;
                INIT_LIST_HEAD(&phba->hbqs[i].hbq_buffer_list);
                ptr += (lpfc_hbq_defs[i]->entry_count *
                        sizeof(struct lpfc_hbq_entry));
        }
        phba->hbqs[LPFC_ELS_HBQ].hbq_alloc_buffer = lpfc_els_hbq_alloc;
        phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer = lpfc_els_hbq_free;

        memset(phba->hbqslimp.virt, 0, lpfc_sli_hbq_size());

        INIT_LIST_HEAD(&phba->rb_pend_list);

        phba->MBslimaddr = phba->slim_memmap_p;
        phba->HAregaddr = phba->ctrl_regs_memmap_p + HA_REG_OFFSET;
        phba->CAregaddr = phba->ctrl_regs_memmap_p + CA_REG_OFFSET;
        phba->HSregaddr = phba->ctrl_regs_memmap_p + HS_REG_OFFSET;
        phba->HCregaddr = phba->ctrl_regs_memmap_p + HC_REG_OFFSET;

        return 0;

out_free_slim:
        dma_free_coherent(&pdev->dev, SLI2_SLIM_SIZE,
                          phba->slim2p.virt, phba->slim2p.phys);
out_iounmap:
        iounmap(phba->ctrl_regs_memmap_p);
out_iounmap_slim:
        iounmap(phba->slim_memmap_p);
out:
        return error;
}

/**
 * lpfc_sli_pci_mem_unset - Unset SLI3 HBA PCI memory space.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset the PCI device memory space for device
 * with SLI-3 interface spec.
 **/
static void
lpfc_sli_pci_mem_unset(struct lpfc_hba *phba)
{
        struct pci_dev *pdev;

        /* Obtain PCI device reference */
        if (!phba->pcidev)
                return;
        else
                pdev = phba->pcidev;

        /* Free coherent DMA memory allocated */
        dma_free_coherent(&pdev->dev, lpfc_sli_hbq_size(),
                          phba->hbqslimp.virt, phba->hbqslimp.phys);
        dma_free_coherent(&pdev->dev, SLI2_SLIM_SIZE,
                          phba->slim2p.virt, phba->slim2p.phys);

        /* I/O memory unmap */
        iounmap(phba->ctrl_regs_memmap_p);
        iounmap(phba->slim_memmap_p);

        return;
}

/**
 * lpfc_sli4_post_status_check - Wait for SLI4 POST done and check status
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to wait for SLI4 device Power On Self Test (POST)
 * done and check status.
 *
 * Return 0 if successful, otherwise -ENODEV.
 **/
int
lpfc_sli4_post_status_check(struct lpfc_hba *phba)
{
        struct lpfc_register sta_reg, uerrlo_reg, uerrhi_reg;
        int i, port_error = -ENODEV;

        if (!phba->sli4_hba.STAregaddr)
                return -ENODEV;

        /* Wait up to 30 seconds for the SLI Port POST done and ready */
        for (i = 0; i < 3000; i++) {
                sta_reg.word0 = readl(phba->sli4_hba.STAregaddr);
                /* Encounter fatal POST error, break out */
                if (bf_get(lpfc_hst_state_perr, &sta_reg)) {
                        port_error = -ENODEV;
                        break;
                }
                if (LPFC_POST_STAGE_ARMFW_READY ==
                    bf_get(lpfc_hst_state_port_status, &sta_reg)) {
                        port_error = 0;
                        break;
                }
                msleep(10);
        }

        if (port_error)
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "1408 Failure HBA POST Status: sta_reg=0x%x, "
                        "perr=x%x, sfi=x%x, nip=x%x, ipc=x%x, xrom=x%x, "
                        "dl=x%x, pstatus=x%x\n", sta_reg.word0,
                        bf_get(lpfc_hst_state_perr, &sta_reg),
                        bf_get(lpfc_hst_state_sfi, &sta_reg),
                        bf_get(lpfc_hst_state_nip, &sta_reg),
                        bf_get(lpfc_hst_state_ipc, &sta_reg),
                        bf_get(lpfc_hst_state_xrom, &sta_reg),
                        bf_get(lpfc_hst_state_dl, &sta_reg),
                        bf_get(lpfc_hst_state_port_status, &sta_reg));

        /* Log device information */
        phba->sli4_hba.sli_intf.word0 = readl(phba->sli4_hba.SLIINTFregaddr);
        if (bf_get(lpfc_sli_intf_valid,
                   &phba->sli4_hba.sli_intf) == LPFC_SLI_INTF_VALID) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "2534 Device Info: ChipType=0x%x, SliRev=0x%x, "
                                "FeatureL1=0x%x, FeatureL2=0x%x\n",
                                bf_get(lpfc_sli_intf_sli_family,
                                       &phba->sli4_hba.sli_intf),
                                bf_get(lpfc_sli_intf_slirev,
                                       &phba->sli4_hba.sli_intf),
                                bf_get(lpfc_sli_intf_featurelevel1,
                                       &phba->sli4_hba.sli_intf),
                                bf_get(lpfc_sli_intf_featurelevel2,
                                       &phba->sli4_hba.sli_intf));
        }
        phba->sli4_hba.ue_mask_lo = readl(phba->sli4_hba.UEMASKLOregaddr);
        phba->sli4_hba.ue_mask_hi = readl(phba->sli4_hba.UEMASKHIregaddr);
        /* With uncoverable error, log the error message and return error */
        uerrlo_reg.word0 = readl(phba->sli4_hba.UERRLOregaddr);
        uerrhi_reg.word0 = readl(phba->sli4_hba.UERRHIregaddr);
        if ((~phba->sli4_hba.ue_mask_lo & uerrlo_reg.word0) ||
            (~phba->sli4_hba.ue_mask_hi & uerrhi_reg.word0)) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1422 HBA Unrecoverable error: "
                                "uerr_lo_reg=0x%x, uerr_hi_reg=0x%x, "
                                "ue_mask_lo_reg=0x%x, ue_mask_hi_reg=0x%x\n",
                                uerrlo_reg.word0, uerrhi_reg.word0,
                                phba->sli4_hba.ue_mask_lo,
                                phba->sli4_hba.ue_mask_hi);
                return -ENODEV;
        }

        return port_error;
}

/**
 * lpfc_sli4_bar0_register_memmap - Set up SLI4 BAR0 register memory map.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up SLI4 BAR0 PCI config space register
 * memory map.
 **/
static void
lpfc_sli4_bar0_register_memmap(struct lpfc_hba *phba)
{
        phba->sli4_hba.UERRLOregaddr = phba->sli4_hba.conf_regs_memmap_p +
                                        LPFC_UERR_STATUS_LO;
        phba->sli4_hba.UERRHIregaddr = phba->sli4_hba.conf_regs_memmap_p +
                                        LPFC_UERR_STATUS_HI;
        phba->sli4_hba.UEMASKLOregaddr = phba->sli4_hba.conf_regs_memmap_p +
                                        LPFC_UE_MASK_LO;
        phba->sli4_hba.UEMASKHIregaddr = phba->sli4_hba.conf_regs_memmap_p +
                                        LPFC_UE_MASK_HI;
        phba->sli4_hba.SLIINTFregaddr = phba->sli4_hba.conf_regs_memmap_p +
                                        LPFC_SLI_INTF;
}

/**
 * lpfc_sli4_bar1_register_memmap - Set up SLI4 BAR1 register memory map.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up SLI4 BAR1 control status register (CSR)
 * memory map.
 **/
static void
lpfc_sli4_bar1_register_memmap(struct lpfc_hba *phba)
{

        phba->sli4_hba.STAregaddr = phba->sli4_hba.ctrl_regs_memmap_p +
                                    LPFC_HST_STATE;
        phba->sli4_hba.ISRregaddr = phba->sli4_hba.ctrl_regs_memmap_p +
                                    LPFC_HST_ISR0;
        phba->sli4_hba.IMRregaddr = phba->sli4_hba.ctrl_regs_memmap_p +
                                    LPFC_HST_IMR0;
        phba->sli4_hba.ISCRregaddr = phba->sli4_hba.ctrl_regs_memmap_p +
                                     LPFC_HST_ISCR0;
        return;
}

/**
 * lpfc_sli4_bar2_register_memmap - Set up SLI4 BAR2 register memory map.
 * @phba: pointer to lpfc hba data structure.
 * @vf: virtual function number
 *
 * This routine is invoked to set up SLI4 BAR2 doorbell register memory map
 * based on the given viftual function number, @vf.
 *
 * Return 0 if successful, otherwise -ENODEV.
 **/
static int
lpfc_sli4_bar2_register_memmap(struct lpfc_hba *phba, uint32_t vf)
{
        if (vf > LPFC_VIR_FUNC_MAX)
                return -ENODEV;

        phba->sli4_hba.RQDBregaddr = (phba->sli4_hba.drbl_regs_memmap_p +
                                vf * LPFC_VFR_PAGE_SIZE + LPFC_RQ_DOORBELL);
        phba->sli4_hba.WQDBregaddr = (phba->sli4_hba.drbl_regs_memmap_p +
                                vf * LPFC_VFR_PAGE_SIZE + LPFC_WQ_DOORBELL);
        phba->sli4_hba.EQCQDBregaddr = (phba->sli4_hba.drbl_regs_memmap_p +
                                vf * LPFC_VFR_PAGE_SIZE + LPFC_EQCQ_DOORBELL);
        phba->sli4_hba.MQDBregaddr = (phba->sli4_hba.drbl_regs_memmap_p +
                                vf * LPFC_VFR_PAGE_SIZE + LPFC_MQ_DOORBELL);
        phba->sli4_hba.BMBXregaddr = (phba->sli4_hba.drbl_regs_memmap_p +
                                vf * LPFC_VFR_PAGE_SIZE + LPFC_BMBX);
        return 0;
}

/**
 * lpfc_create_bootstrap_mbox - Create the bootstrap mailbox
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to create the bootstrap mailbox
 * region consistent with the SLI-4 interface spec.  This
 * routine allocates all memory necessary to communicate
 * mailbox commands to the port and sets up all alignment
 * needs.  No locks are expected to be held when calling
 * this routine.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - could not allocated memory.
 **/
static int
lpfc_create_bootstrap_mbox(struct lpfc_hba *phba)
{
        uint32_t bmbx_size;
        struct lpfc_dmabuf *dmabuf;
        struct dma_address *dma_address;
        uint32_t pa_addr;
        uint64_t phys_addr;

        dmabuf = kzalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
        if (!dmabuf)
                return -ENOMEM;

        /*
         * The bootstrap mailbox region is comprised of 2 parts
         * plus an alignment restriction of 16 bytes.
         */
        bmbx_size = sizeof(struct lpfc_bmbx_create) + (LPFC_ALIGN_16_BYTE - 1);
        dmabuf->virt = dma_alloc_coherent(&phba->pcidev->dev,
                                          bmbx_size,
                                          &dmabuf->phys,
                                          GFP_KERNEL);
        if (!dmabuf->virt) {
                kfree(dmabuf);
                return -ENOMEM;
        }
        memset(dmabuf->virt, 0, bmbx_size);

        /*
         * Initialize the bootstrap mailbox pointers now so that the register
         * operations are simple later.  The mailbox dma address is required
         * to be 16-byte aligned.  Also align the virtual memory as each
         * maibox is copied into the bmbx mailbox region before issuing the
         * command to the port.
         */
        phba->sli4_hba.bmbx.dmabuf = dmabuf;
        phba->sli4_hba.bmbx.bmbx_size = bmbx_size;

        phba->sli4_hba.bmbx.avirt = PTR_ALIGN(dmabuf->virt,
                                              LPFC_ALIGN_16_BYTE);
        phba->sli4_hba.bmbx.aphys = ALIGN(dmabuf->phys,
                                              LPFC_ALIGN_16_BYTE);

        /*
         * Set the high and low physical addresses now.  The SLI4 alignment
         * requirement is 16 bytes and the mailbox is posted to the port
         * as two 30-bit addresses.  The other data is a bit marking whether
         * the 30-bit address is the high or low address.
         * Upcast bmbx aphys to 64bits so shift instruction compiles
         * clean on 32 bit machines.
         */
        dma_address = &phba->sli4_hba.bmbx.dma_address;
        phys_addr = (uint64_t)phba->sli4_hba.bmbx.aphys;
        pa_addr = (uint32_t) ((phys_addr >> 34) & 0x3fffffff);
        dma_address->addr_hi = (uint32_t) ((pa_addr << 2) |
                                           LPFC_BMBX_BIT1_ADDR_HI);

        pa_addr = (uint32_t) ((phba->sli4_hba.bmbx.aphys >> 4) & 0x3fffffff);
        dma_address->addr_lo = (uint32_t) ((pa_addr << 2) |
                                           LPFC_BMBX_BIT1_ADDR_LO);
        return 0;
}

/**
 * lpfc_destroy_bootstrap_mbox - Destroy all bootstrap mailbox resources
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to teardown the bootstrap mailbox
 * region and release all host resources. This routine requires
 * the caller to ensure all mailbox commands recovered, no
 * additional mailbox comands are sent, and interrupts are disabled
 * before calling this routine.
 *
 **/
static void
lpfc_destroy_bootstrap_mbox(struct lpfc_hba *phba)
{
        dma_free_coherent(&phba->pcidev->dev,
                          phba->sli4_hba.bmbx.bmbx_size,
                          phba->sli4_hba.bmbx.dmabuf->virt,
                          phba->sli4_hba.bmbx.dmabuf->phys);

        kfree(phba->sli4_hba.bmbx.dmabuf);
        memset(&phba->sli4_hba.bmbx, 0, sizeof(struct lpfc_bmbx));
}

/**
 * lpfc_sli4_read_config - Get the config parameters.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to read the configuration parameters from the HBA.
 * The configuration parameters are used to set the base and maximum values
 * for RPI's XRI's VPI's VFI's and FCFIs. These values also affect the resource
 * allocation for the port.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
static int
lpfc_sli4_read_config(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *pmb;
        struct lpfc_mbx_read_config *rd_config;
        uint32_t rc = 0;

        pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmb) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2011 Unable to allocate memory for issuing "
                                "SLI_CONFIG_SPECIAL mailbox command\n");
                return -ENOMEM;
        }

        lpfc_read_config(phba, pmb);

        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
        if (rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                        "2012 Mailbox failed , mbxCmd x%x "
                        "READ_CONFIG, mbxStatus x%x\n",
                        bf_get(lpfc_mqe_command, &pmb->u.mqe),
                        bf_get(lpfc_mqe_status, &pmb->u.mqe));
                rc = -EIO;
        } else {
                rd_config = &pmb->u.mqe.un.rd_config;
                phba->sli4_hba.max_cfg_param.max_xri =
                        bf_get(lpfc_mbx_rd_conf_xri_count, rd_config);
                phba->sli4_hba.max_cfg_param.xri_base =
                        bf_get(lpfc_mbx_rd_conf_xri_base, rd_config);
                phba->sli4_hba.max_cfg_param.max_vpi =
                        bf_get(lpfc_mbx_rd_conf_vpi_count, rd_config);
                phba->sli4_hba.max_cfg_param.vpi_base =
                        bf_get(lpfc_mbx_rd_conf_vpi_base, rd_config);
                phba->sli4_hba.max_cfg_param.max_rpi =
                        bf_get(lpfc_mbx_rd_conf_rpi_count, rd_config);
                phba->sli4_hba.max_cfg_param.rpi_base =
                        bf_get(lpfc_mbx_rd_conf_rpi_base, rd_config);
                phba->sli4_hba.max_cfg_param.max_vfi =
                        bf_get(lpfc_mbx_rd_conf_vfi_count, rd_config);
                phba->sli4_hba.max_cfg_param.vfi_base =
                        bf_get(lpfc_mbx_rd_conf_vfi_base, rd_config);
                phba->sli4_hba.max_cfg_param.max_fcfi =
                        bf_get(lpfc_mbx_rd_conf_fcfi_count, rd_config);
                phba->sli4_hba.max_cfg_param.fcfi_base =
                        bf_get(lpfc_mbx_rd_conf_fcfi_base, rd_config);
                phba->sli4_hba.max_cfg_param.max_eq =
                        bf_get(lpfc_mbx_rd_conf_eq_count, rd_config);
                phba->sli4_hba.max_cfg_param.max_rq =
                        bf_get(lpfc_mbx_rd_conf_rq_count, rd_config);
                phba->sli4_hba.max_cfg_param.max_wq =
                        bf_get(lpfc_mbx_rd_conf_wq_count, rd_config);
                phba->sli4_hba.max_cfg_param.max_cq =
                        bf_get(lpfc_mbx_rd_conf_cq_count, rd_config);
                phba->lmt = bf_get(lpfc_mbx_rd_conf_lmt, rd_config);
                phba->sli4_hba.next_xri = phba->sli4_hba.max_cfg_param.xri_base;
                phba->vpi_base = phba->sli4_hba.max_cfg_param.vpi_base;
                phba->vfi_base = phba->sli4_hba.max_cfg_param.vfi_base;
                phba->sli4_hba.next_rpi = phba->sli4_hba.max_cfg_param.rpi_base;
                phba->max_vpi = (phba->sli4_hba.max_cfg_param.max_vpi > 0) ?
                                (phba->sli4_hba.max_cfg_param.max_vpi - 1) : 0;
                phba->max_vports = phba->max_vpi;
                lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
                                "2003 cfg params XRI(B:%d M:%d), "
                                "VPI(B:%d M:%d) "
                                "VFI(B:%d M:%d) "
                                "RPI(B:%d M:%d) "
                                "FCFI(B:%d M:%d)\n",
                                phba->sli4_hba.max_cfg_param.xri_base,
                                phba->sli4_hba.max_cfg_param.max_xri,
                                phba->sli4_hba.max_cfg_param.vpi_base,
                                phba->sli4_hba.max_cfg_param.max_vpi,
                                phba->sli4_hba.max_cfg_param.vfi_base,
                                phba->sli4_hba.max_cfg_param.max_vfi,
                                phba->sli4_hba.max_cfg_param.rpi_base,
                                phba->sli4_hba.max_cfg_param.max_rpi,
                                phba->sli4_hba.max_cfg_param.fcfi_base,
                                phba->sli4_hba.max_cfg_param.max_fcfi);
        }
        mempool_free(pmb, phba->mbox_mem_pool);

        /* Reset the DFT_HBA_Q_DEPTH to the max xri  */
        if (phba->cfg_hba_queue_depth > (phba->sli4_hba.max_cfg_param.max_xri))
                phba->cfg_hba_queue_depth =
                                phba->sli4_hba.max_cfg_param.max_xri;
        return rc;
}

/**
 * lpfc_dev_endian_order_setup - Notify the port of the host's endian order.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to setup the host-side endian order to the
 * HBA consistent with the SLI-4 interface spec.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
static int
lpfc_setup_endian_order(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *mboxq;
        uint32_t rc = 0;
        uint32_t endian_mb_data[2] = {HOST_ENDIAN_LOW_WORD0,
                                      HOST_ENDIAN_HIGH_WORD1};

        mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0492 Unable to allocate memory for issuing "
                                "SLI_CONFIG_SPECIAL mailbox command\n");
                return -ENOMEM;
        }

        /*
         * The SLI4_CONFIG_SPECIAL mailbox command requires the first two
         * words to contain special data values and no other data.
         */
        memset(mboxq, 0, sizeof(LPFC_MBOXQ_t));
        memcpy(&mboxq->u.mqe, &endian_mb_data, sizeof(endian_mb_data));
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        if (rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0493 SLI_CONFIG_SPECIAL mailbox failed with "
                                "status x%x\n",
                                rc);
                rc = -EIO;
        }

        mempool_free(mboxq, phba->mbox_mem_pool);
        return rc;
}

/**
 * lpfc_sli4_queue_create - Create all the SLI4 queues
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to allocate all the SLI4 queues for the FCoE HBA
 * operation. For each SLI4 queue type, the parameters such as queue entry
 * count (queue depth) shall be taken from the module parameter. For now,
 * we just use some constant number as place holder.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
static int
lpfc_sli4_queue_create(struct lpfc_hba *phba)
{
        struct lpfc_queue *qdesc;
        int fcp_eqidx, fcp_cqidx, fcp_wqidx;
        int cfg_fcp_wq_count;
        int cfg_fcp_eq_count;

        /*
         * Sanity check for confiugred queue parameters against the run-time
         * device parameters
         */

        /* Sanity check on FCP fast-path WQ parameters */
        cfg_fcp_wq_count = phba->cfg_fcp_wq_count;
        if (cfg_fcp_wq_count >
            (phba->sli4_hba.max_cfg_param.max_wq - LPFC_SP_WQN_DEF)) {
                cfg_fcp_wq_count = phba->sli4_hba.max_cfg_param.max_wq -
                                   LPFC_SP_WQN_DEF;
                if (cfg_fcp_wq_count < LPFC_FP_WQN_MIN) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "2581 Not enough WQs (%d) from "
                                        "the pci function for supporting "
                                        "FCP WQs (%d)\n",
                                        phba->sli4_hba.max_cfg_param.max_wq,
                                        phba->cfg_fcp_wq_count);
                        goto out_error;
                }
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "2582 Not enough WQs (%d) from the pci "
                                "function for supporting the requested "
                                "FCP WQs (%d), the actual FCP WQs can "
                                "be supported: %d\n",
                                phba->sli4_hba.max_cfg_param.max_wq,
                                phba->cfg_fcp_wq_count, cfg_fcp_wq_count);
        }
        /* The actual number of FCP work queues adopted */
        phba->cfg_fcp_wq_count = cfg_fcp_wq_count;

        /* Sanity check on FCP fast-path EQ parameters */
        cfg_fcp_eq_count = phba->cfg_fcp_eq_count;
        if (cfg_fcp_eq_count >
            (phba->sli4_hba.max_cfg_param.max_eq - LPFC_SP_EQN_DEF)) {
                cfg_fcp_eq_count = phba->sli4_hba.max_cfg_param.max_eq -
                                   LPFC_SP_EQN_DEF;
                if (cfg_fcp_eq_count < LPFC_FP_EQN_MIN) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "2574 Not enough EQs (%d) from the "
                                        "pci function for supporting FCP "
                                        "EQs (%d)\n",
                                        phba->sli4_hba.max_cfg_param.max_eq,
                                        phba->cfg_fcp_eq_count);
                        goto out_error;
                }
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "2575 Not enough EQs (%d) from the pci "
                                "function for supporting the requested "
                                "FCP EQs (%d), the actual FCP EQs can "
                                "be supported: %d\n",
                                phba->sli4_hba.max_cfg_param.max_eq,
                                phba->cfg_fcp_eq_count, cfg_fcp_eq_count);
        }
        /* It does not make sense to have more EQs than WQs */
        if (cfg_fcp_eq_count > phba->cfg_fcp_wq_count) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "2593 The FCP EQ count(%d) cannot be greater "
                                "than the FCP WQ count(%d), limiting the "
                                "FCP EQ count to %d\n", cfg_fcp_eq_count,
                                phba->cfg_fcp_wq_count,
                                phba->cfg_fcp_wq_count);
                cfg_fcp_eq_count = phba->cfg_fcp_wq_count;
        }
        /* The actual number of FCP event queues adopted */
        phba->cfg_fcp_eq_count = cfg_fcp_eq_count;
        /* The overall number of event queues used */
        phba->sli4_hba.cfg_eqn = phba->cfg_fcp_eq_count + LPFC_SP_EQN_DEF;

        /*
         * Create Event Queues (EQs)
         */

        /* Get EQ depth from module parameter, fake the default for now */
        phba->sli4_hba.eq_esize = LPFC_EQE_SIZE_4B;
        phba->sli4_hba.eq_ecount = LPFC_EQE_DEF_COUNT;

        /* Create slow path event queue */
        qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.eq_esize,
                                      phba->sli4_hba.eq_ecount);
        if (!qdesc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0496 Failed allocate slow-path EQ\n");
                goto out_error;
        }
        phba->sli4_hba.sp_eq = qdesc;

        /* Create fast-path FCP Event Queue(s) */
        phba->sli4_hba.fp_eq = kzalloc((sizeof(struct lpfc_queue *) *
                               phba->cfg_fcp_eq_count), GFP_KERNEL);
        if (!phba->sli4_hba.fp_eq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2576 Failed allocate memory for fast-path "
                                "EQ record array\n");
                goto out_free_sp_eq;
        }
        for (fcp_eqidx = 0; fcp_eqidx < phba->cfg_fcp_eq_count; fcp_eqidx++) {
                qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.eq_esize,
                                              phba->sli4_hba.eq_ecount);
                if (!qdesc) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0497 Failed allocate fast-path EQ\n");
                        goto out_free_fp_eq;
                }
                phba->sli4_hba.fp_eq[fcp_eqidx] = qdesc;
        }

        /*
         * Create Complete Queues (CQs)
         */

        /* Get CQ depth from module parameter, fake the default for now */
        phba->sli4_hba.cq_esize = LPFC_CQE_SIZE;
        phba->sli4_hba.cq_ecount = LPFC_CQE_DEF_COUNT;

        /* Create slow-path Mailbox Command Complete Queue */
        qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.cq_esize,
                                      phba->sli4_hba.cq_ecount);
        if (!qdesc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0500 Failed allocate slow-path mailbox CQ\n");
                goto out_free_fp_eq;
        }
        phba->sli4_hba.mbx_cq = qdesc;

        /* Create slow-path ELS Complete Queue */
        qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.cq_esize,
                                      phba->sli4_hba.cq_ecount);
        if (!qdesc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0501 Failed allocate slow-path ELS CQ\n");
                goto out_free_mbx_cq;
        }
        phba->sli4_hba.els_cq = qdesc;


        /* Create fast-path FCP Completion Queue(s), one-to-one with EQs */
        phba->sli4_hba.fcp_cq = kzalloc((sizeof(struct lpfc_queue *) *
                                phba->cfg_fcp_eq_count), GFP_KERNEL);
        if (!phba->sli4_hba.fcp_cq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2577 Failed allocate memory for fast-path "
                                "CQ record array\n");
                goto out_free_els_cq;
        }
        for (fcp_cqidx = 0; fcp_cqidx < phba->cfg_fcp_eq_count; fcp_cqidx++) {
                qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.cq_esize,
                                              phba->sli4_hba.cq_ecount);
                if (!qdesc) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0499 Failed allocate fast-path FCP "
                                        "CQ (%d)\n", fcp_cqidx);
                        goto out_free_fcp_cq;
                }
                phba->sli4_hba.fcp_cq[fcp_cqidx] = qdesc;
        }

        /* Create Mailbox Command Queue */
        phba->sli4_hba.mq_esize = LPFC_MQE_SIZE;
        phba->sli4_hba.mq_ecount = LPFC_MQE_DEF_COUNT;

        qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.mq_esize,
                                      phba->sli4_hba.mq_ecount);
        if (!qdesc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0505 Failed allocate slow-path MQ\n");
                goto out_free_fcp_cq;
        }
        phba->sli4_hba.mbx_wq = qdesc;

        /*
         * Create all the Work Queues (WQs)
         */
        phba->sli4_hba.wq_esize = LPFC_WQE_SIZE;
        phba->sli4_hba.wq_ecount = LPFC_WQE_DEF_COUNT;

        /* Create slow-path ELS Work Queue */
        qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.wq_esize,
                                      phba->sli4_hba.wq_ecount);
        if (!qdesc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0504 Failed allocate slow-path ELS WQ\n");
                goto out_free_mbx_wq;
        }
        phba->sli4_hba.els_wq = qdesc;

        /* Create fast-path FCP Work Queue(s) */
        phba->sli4_hba.fcp_wq = kzalloc((sizeof(struct lpfc_queue *) *
                                phba->cfg_fcp_wq_count), GFP_KERNEL);
        if (!phba->sli4_hba.fcp_wq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2578 Failed allocate memory for fast-path "
                                "WQ record array\n");
                goto out_free_els_wq;
        }
        for (fcp_wqidx = 0; fcp_wqidx < phba->cfg_fcp_wq_count; fcp_wqidx++) {
                qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.wq_esize,
                                              phba->sli4_hba.wq_ecount);
                if (!qdesc) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0503 Failed allocate fast-path FCP "
                                        "WQ (%d)\n", fcp_wqidx);
                        goto out_free_fcp_wq;
                }
                phba->sli4_hba.fcp_wq[fcp_wqidx] = qdesc;
        }

        /*
         * Create Receive Queue (RQ)
         */
        phba->sli4_hba.rq_esize = LPFC_RQE_SIZE;
        phba->sli4_hba.rq_ecount = LPFC_RQE_DEF_COUNT;

        /* Create Receive Queue for header */
        qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.rq_esize,
                                      phba->sli4_hba.rq_ecount);
        if (!qdesc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0506 Failed allocate receive HRQ\n");
                goto out_free_fcp_wq;
        }
        phba->sli4_hba.hdr_rq = qdesc;

        /* Create Receive Queue for data */
        qdesc = lpfc_sli4_queue_alloc(phba, phba->sli4_hba.rq_esize,
                                      phba->sli4_hba.rq_ecount);
        if (!qdesc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0507 Failed allocate receive DRQ\n");
                goto out_free_hdr_rq;
        }
        phba->sli4_hba.dat_rq = qdesc;

        return 0;

out_free_hdr_rq:
        lpfc_sli4_queue_free(phba->sli4_hba.hdr_rq);
        phba->sli4_hba.hdr_rq = NULL;
out_free_fcp_wq:
        for (--fcp_wqidx; fcp_wqidx >= 0; fcp_wqidx--) {
                lpfc_sli4_queue_free(phba->sli4_hba.fcp_wq[fcp_wqidx]);
                phba->sli4_hba.fcp_wq[fcp_wqidx] = NULL;
        }
        kfree(phba->sli4_hba.fcp_wq);
out_free_els_wq:
        lpfc_sli4_queue_free(phba->sli4_hba.els_wq);
        phba->sli4_hba.els_wq = NULL;
out_free_mbx_wq:
        lpfc_sli4_queue_free(phba->sli4_hba.mbx_wq);
        phba->sli4_hba.mbx_wq = NULL;
out_free_fcp_cq:
        for (--fcp_cqidx; fcp_cqidx >= 0; fcp_cqidx--) {
                lpfc_sli4_queue_free(phba->sli4_hba.fcp_cq[fcp_cqidx]);
                phba->sli4_hba.fcp_cq[fcp_cqidx] = NULL;
        }
        kfree(phba->sli4_hba.fcp_cq);
out_free_els_cq:
        lpfc_sli4_queue_free(phba->sli4_hba.els_cq);
        phba->sli4_hba.els_cq = NULL;
out_free_mbx_cq:
        lpfc_sli4_queue_free(phba->sli4_hba.mbx_cq);
        phba->sli4_hba.mbx_cq = NULL;
out_free_fp_eq:
        for (--fcp_eqidx; fcp_eqidx >= 0; fcp_eqidx--) {
                lpfc_sli4_queue_free(phba->sli4_hba.fp_eq[fcp_eqidx]);
                phba->sli4_hba.fp_eq[fcp_eqidx] = NULL;
        }
        kfree(phba->sli4_hba.fp_eq);
out_free_sp_eq:
        lpfc_sli4_queue_free(phba->sli4_hba.sp_eq);
        phba->sli4_hba.sp_eq = NULL;
out_error:
        return -ENOMEM;
}

/**
 * lpfc_sli4_queue_destroy - Destroy all the SLI4 queues
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to release all the SLI4 queues with the FCoE HBA
 * operation.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
static void
lpfc_sli4_queue_destroy(struct lpfc_hba *phba)
{
        int fcp_qidx;

        /* Release mailbox command work queue */
        lpfc_sli4_queue_free(phba->sli4_hba.mbx_wq);
        phba->sli4_hba.mbx_wq = NULL;

        /* Release ELS work queue */
        lpfc_sli4_queue_free(phba->sli4_hba.els_wq);
        phba->sli4_hba.els_wq = NULL;

        /* Release FCP work queue */
        for (fcp_qidx = 0; fcp_qidx < phba->cfg_fcp_wq_count; fcp_qidx++)
                lpfc_sli4_queue_free(phba->sli4_hba.fcp_wq[fcp_qidx]);
        kfree(phba->sli4_hba.fcp_wq);
        phba->sli4_hba.fcp_wq = NULL;

        /* Release unsolicited receive queue */
        lpfc_sli4_queue_free(phba->sli4_hba.hdr_rq);
        phba->sli4_hba.hdr_rq = NULL;
        lpfc_sli4_queue_free(phba->sli4_hba.dat_rq);
        phba->sli4_hba.dat_rq = NULL;

        /* Release ELS complete queue */
        lpfc_sli4_queue_free(phba->sli4_hba.els_cq);
        phba->sli4_hba.els_cq = NULL;

        /* Release mailbox command complete queue */
        lpfc_sli4_queue_free(phba->sli4_hba.mbx_cq);
        phba->sli4_hba.mbx_cq = NULL;

        /* Release FCP response complete queue */
        for (fcp_qidx = 0; fcp_qidx < phba->cfg_fcp_eq_count; fcp_qidx++)
                lpfc_sli4_queue_free(phba->sli4_hba.fcp_cq[fcp_qidx]);
        kfree(phba->sli4_hba.fcp_cq);
        phba->sli4_hba.fcp_cq = NULL;

        /* Release fast-path event queue */
        for (fcp_qidx = 0; fcp_qidx < phba->cfg_fcp_eq_count; fcp_qidx++)
                lpfc_sli4_queue_free(phba->sli4_hba.fp_eq[fcp_qidx]);
        kfree(phba->sli4_hba.fp_eq);
        phba->sli4_hba.fp_eq = NULL;

        /* Release slow-path event queue */
        lpfc_sli4_queue_free(phba->sli4_hba.sp_eq);
        phba->sli4_hba.sp_eq = NULL;

        return;
}

/**
 * lpfc_sli4_queue_setup - Set up all the SLI4 queues
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up all the SLI4 queues for the FCoE HBA
 * operation.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
int
lpfc_sli4_queue_setup(struct lpfc_hba *phba)
{
        int rc = -ENOMEM;
        int fcp_eqidx, fcp_cqidx, fcp_wqidx;
        int fcp_cq_index = 0;

        /*
         * Set up Event Queues (EQs)
         */

        /* Set up slow-path event queue */
        if (!phba->sli4_hba.sp_eq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0520 Slow-path EQ not allocated\n");
                goto out_error;
        }
        rc = lpfc_eq_create(phba, phba->sli4_hba.sp_eq,
                            LPFC_SP_DEF_IMAX);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0521 Failed setup of slow-path EQ: "
                                "rc = 0x%x\n", rc);
                goto out_error;
        }
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "2583 Slow-path EQ setup: queue-id=%d\n",
                        phba->sli4_hba.sp_eq->queue_id);

        /* Set up fast-path event queue */
        for (fcp_eqidx = 0; fcp_eqidx < phba->cfg_fcp_eq_count; fcp_eqidx++) {
                if (!phba->sli4_hba.fp_eq[fcp_eqidx]) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0522 Fast-path EQ (%d) not "
                                        "allocated\n", fcp_eqidx);
                        goto out_destroy_fp_eq;
                }
                rc = lpfc_eq_create(phba, phba->sli4_hba.fp_eq[fcp_eqidx],
                                    phba->cfg_fcp_imax);
                if (rc) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0523 Failed setup of fast-path EQ "
                                        "(%d), rc = 0x%x\n", fcp_eqidx, rc);
                        goto out_destroy_fp_eq;
                }
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "2584 Fast-path EQ setup: "
                                "queue[%d]-id=%d\n", fcp_eqidx,
                                phba->sli4_hba.fp_eq[fcp_eqidx]->queue_id);
        }

        /*
         * Set up Complete Queues (CQs)
         */

        /* Set up slow-path MBOX Complete Queue as the first CQ */
        if (!phba->sli4_hba.mbx_cq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0528 Mailbox CQ not allocated\n");
                goto out_destroy_fp_eq;
        }
        rc = lpfc_cq_create(phba, phba->sli4_hba.mbx_cq, phba->sli4_hba.sp_eq,
                            LPFC_MCQ, LPFC_MBOX);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0529 Failed setup of slow-path mailbox CQ: "
                                "rc = 0x%x\n", rc);
                goto out_destroy_fp_eq;
        }
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "2585 MBX CQ setup: cq-id=%d, parent eq-id=%d\n",
                        phba->sli4_hba.mbx_cq->queue_id,
                        phba->sli4_hba.sp_eq->queue_id);

        /* Set up slow-path ELS Complete Queue */
        if (!phba->sli4_hba.els_cq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0530 ELS CQ not allocated\n");
                goto out_destroy_mbx_cq;
        }
        rc = lpfc_cq_create(phba, phba->sli4_hba.els_cq, phba->sli4_hba.sp_eq,
                            LPFC_WCQ, LPFC_ELS);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0531 Failed setup of slow-path ELS CQ: "
                                "rc = 0x%x\n", rc);
                goto out_destroy_mbx_cq;
        }
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "2586 ELS CQ setup: cq-id=%d, parent eq-id=%d\n",
                        phba->sli4_hba.els_cq->queue_id,
                        phba->sli4_hba.sp_eq->queue_id);

        /* Set up fast-path FCP Response Complete Queue */
        for (fcp_cqidx = 0; fcp_cqidx < phba->cfg_fcp_eq_count; fcp_cqidx++) {
                if (!phba->sli4_hba.fcp_cq[fcp_cqidx]) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0526 Fast-path FCP CQ (%d) not "
                                        "allocated\n", fcp_cqidx);
                        goto out_destroy_fcp_cq;
                }
                rc = lpfc_cq_create(phba, phba->sli4_hba.fcp_cq[fcp_cqidx],
                                    phba->sli4_hba.fp_eq[fcp_cqidx],
                                    LPFC_WCQ, LPFC_FCP);
                if (rc) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0527 Failed setup of fast-path FCP "
                                        "CQ (%d), rc = 0x%x\n", fcp_cqidx, rc);
                        goto out_destroy_fcp_cq;
                }
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "2588 FCP CQ setup: cq[%d]-id=%d, "
                                "parent eq[%d]-id=%d\n",
                                fcp_cqidx,
                                phba->sli4_hba.fcp_cq[fcp_cqidx]->queue_id,
                                fcp_cqidx,
                                phba->sli4_hba.fp_eq[fcp_cqidx]->queue_id);
        }

        /*
         * Set up all the Work Queues (WQs)
         */

        /* Set up Mailbox Command Queue */
        if (!phba->sli4_hba.mbx_wq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0538 Slow-path MQ not allocated\n");
                goto out_destroy_fcp_cq;
        }
        rc = lpfc_mq_create(phba, phba->sli4_hba.mbx_wq,
                            phba->sli4_hba.mbx_cq, LPFC_MBOX);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0539 Failed setup of slow-path MQ: "
                                "rc = 0x%x\n", rc);
                goto out_destroy_fcp_cq;
        }
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "2589 MBX MQ setup: wq-id=%d, parent cq-id=%d\n",
                        phba->sli4_hba.mbx_wq->queue_id,
                        phba->sli4_hba.mbx_cq->queue_id);

        /* Set up slow-path ELS Work Queue */
        if (!phba->sli4_hba.els_wq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0536 Slow-path ELS WQ not allocated\n");
                goto out_destroy_mbx_wq;
        }
        rc = lpfc_wq_create(phba, phba->sli4_hba.els_wq,
                            phba->sli4_hba.els_cq, LPFC_ELS);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0537 Failed setup of slow-path ELS WQ: "
                                "rc = 0x%x\n", rc);
                goto out_destroy_mbx_wq;
        }
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "2590 ELS WQ setup: wq-id=%d, parent cq-id=%d\n",
                        phba->sli4_hba.els_wq->queue_id,
                        phba->sli4_hba.els_cq->queue_id);

        /* Set up fast-path FCP Work Queue */
        for (fcp_wqidx = 0; fcp_wqidx < phba->cfg_fcp_wq_count; fcp_wqidx++) {
                if (!phba->sli4_hba.fcp_wq[fcp_wqidx]) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0534 Fast-path FCP WQ (%d) not "
                                        "allocated\n", fcp_wqidx);
                        goto out_destroy_fcp_wq;
                }
                rc = lpfc_wq_create(phba, phba->sli4_hba.fcp_wq[fcp_wqidx],
                                    phba->sli4_hba.fcp_cq[fcp_cq_index],
                                    LPFC_FCP);
                if (rc) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0535 Failed setup of fast-path FCP "
                                        "WQ (%d), rc = 0x%x\n", fcp_wqidx, rc);
                        goto out_destroy_fcp_wq;
                }
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "2591 FCP WQ setup: wq[%d]-id=%d, "
                                "parent cq[%d]-id=%d\n",
                                fcp_wqidx,
                                phba->sli4_hba.fcp_wq[fcp_wqidx]->queue_id,
                                fcp_cq_index,
                                phba->sli4_hba.fcp_cq[fcp_cq_index]->queue_id);
                /* Round robin FCP Work Queue's Completion Queue assignment */
                fcp_cq_index = ((fcp_cq_index + 1) % phba->cfg_fcp_eq_count);
        }

        /*
         * Create Receive Queue (RQ)
         */
        if (!phba->sli4_hba.hdr_rq || !phba->sli4_hba.dat_rq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0540 Receive Queue not allocated\n");
                goto out_destroy_fcp_wq;
        }
        rc = lpfc_rq_create(phba, phba->sli4_hba.hdr_rq, phba->sli4_hba.dat_rq,
                            phba->sli4_hba.els_cq, LPFC_USOL);
        if (rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0541 Failed setup of Receive Queue: "
                                "rc = 0x%x\n", rc);
                goto out_destroy_fcp_wq;
        }
        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "2592 USL RQ setup: hdr-rq-id=%d, dat-rq-id=%d "
                        "parent cq-id=%d\n",
                        phba->sli4_hba.hdr_rq->queue_id,
                        phba->sli4_hba.dat_rq->queue_id,
                        phba->sli4_hba.els_cq->queue_id);
        return 0;

out_destroy_fcp_wq:
        for (--fcp_wqidx; fcp_wqidx >= 0; fcp_wqidx--)
                lpfc_wq_destroy(phba, phba->sli4_hba.fcp_wq[fcp_wqidx]);
        lpfc_wq_destroy(phba, phba->sli4_hba.els_wq);
out_destroy_mbx_wq:
        lpfc_mq_destroy(phba, phba->sli4_hba.mbx_wq);
out_destroy_fcp_cq:
        for (--fcp_cqidx; fcp_cqidx >= 0; fcp_cqidx--)
                lpfc_cq_destroy(phba, phba->sli4_hba.fcp_cq[fcp_cqidx]);
        lpfc_cq_destroy(phba, phba->sli4_hba.els_cq);
out_destroy_mbx_cq:
        lpfc_cq_destroy(phba, phba->sli4_hba.mbx_cq);
out_destroy_fp_eq:
        for (--fcp_eqidx; fcp_eqidx >= 0; fcp_eqidx--)
                lpfc_eq_destroy(phba, phba->sli4_hba.fp_eq[fcp_eqidx]);
        lpfc_eq_destroy(phba, phba->sli4_hba.sp_eq);
out_error:
        return rc;
}

/**
 * lpfc_sli4_queue_unset - Unset all the SLI4 queues
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset all the SLI4 queues with the FCoE HBA
 * operation.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
void
lpfc_sli4_queue_unset(struct lpfc_hba *phba)
{
        int fcp_qidx;

        /* Unset mailbox command work queue */
        lpfc_mq_destroy(phba, phba->sli4_hba.mbx_wq);
        /* Unset ELS work queue */
        lpfc_wq_destroy(phba, phba->sli4_hba.els_wq);
        /* Unset unsolicited receive queue */
        lpfc_rq_destroy(phba, phba->sli4_hba.hdr_rq, phba->sli4_hba.dat_rq);
        /* Unset FCP work queue */
        for (fcp_qidx = 0; fcp_qidx < phba->cfg_fcp_wq_count; fcp_qidx++)
                lpfc_wq_destroy(phba, phba->sli4_hba.fcp_wq[fcp_qidx]);
        /* Unset mailbox command complete queue */
        lpfc_cq_destroy(phba, phba->sli4_hba.mbx_cq);
        /* Unset ELS complete queue */
        lpfc_cq_destroy(phba, phba->sli4_hba.els_cq);
        /* Unset FCP response complete queue */
        for (fcp_qidx = 0; fcp_qidx < phba->cfg_fcp_eq_count; fcp_qidx++)
                lpfc_cq_destroy(phba, phba->sli4_hba.fcp_cq[fcp_qidx]);
        /* Unset fast-path event queue */
        for (fcp_qidx = 0; fcp_qidx < phba->cfg_fcp_eq_count; fcp_qidx++)
                lpfc_eq_destroy(phba, phba->sli4_hba.fp_eq[fcp_qidx]);
        /* Unset slow-path event queue */
        lpfc_eq_destroy(phba, phba->sli4_hba.sp_eq);
}

/**
 * lpfc_sli4_cq_event_pool_create - Create completion-queue event free pool
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to allocate and set up a pool of completion queue
 * events. The body of the completion queue event is a completion queue entry
 * CQE. For now, this pool is used for the interrupt service routine to queue
 * the following HBA completion queue events for the worker thread to process:
 *   - Mailbox asynchronous events
 *   - Receive queue completion unsolicited events
 * Later, this can be used for all the slow-path events.
 *
 * Return codes
 *      0 - successful
 *      -ENOMEM - No availble memory
 **/
static int
lpfc_sli4_cq_event_pool_create(struct lpfc_hba *phba)
{
        struct lpfc_cq_event *cq_event;
        int i;

        for (i = 0; i < (4 * phba->sli4_hba.cq_ecount); i++) {
                cq_event = kmalloc(sizeof(struct lpfc_cq_event), GFP_KERNEL);
                if (!cq_event)
                        goto out_pool_create_fail;
                list_add_tail(&cq_event->list,
                              &phba->sli4_hba.sp_cqe_event_pool);
        }
        return 0;

out_pool_create_fail:
        lpfc_sli4_cq_event_pool_destroy(phba);
        return -ENOMEM;
}

/**
 * lpfc_sli4_cq_event_pool_destroy - Free completion-queue event free pool
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to free the pool of completion queue events at
 * driver unload time. Note that, it is the responsibility of the driver
 * cleanup routine to free all the outstanding completion-queue events
 * allocated from this pool back into the pool before invoking this routine
 * to destroy the pool.
 **/
static void
lpfc_sli4_cq_event_pool_destroy(struct lpfc_hba *phba)
{
        struct lpfc_cq_event *cq_event, *next_cq_event;

        list_for_each_entry_safe(cq_event, next_cq_event,
                                 &phba->sli4_hba.sp_cqe_event_pool, list) {
                list_del(&cq_event->list);
                kfree(cq_event);
        }
}

/**
 * __lpfc_sli4_cq_event_alloc - Allocate a completion-queue event from free pool
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is the lock free version of the API invoked to allocate a
 * completion-queue event from the free pool.
 *
 * Return: Pointer to the newly allocated completion-queue event if successful
 *         NULL otherwise.
 **/
struct lpfc_cq_event *
__lpfc_sli4_cq_event_alloc(struct lpfc_hba *phba)
{
        struct lpfc_cq_event *cq_event = NULL;

        list_remove_head(&phba->sli4_hba.sp_cqe_event_pool, cq_event,
                         struct lpfc_cq_event, list);
        return cq_event;
}

/**
 * lpfc_sli4_cq_event_alloc - Allocate a completion-queue event from free pool
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is the lock version of the API invoked to allocate a
 * completion-queue event from the free pool.
 *
 * Return: Pointer to the newly allocated completion-queue event if successful
 *         NULL otherwise.
 **/
struct lpfc_cq_event *
lpfc_sli4_cq_event_alloc(struct lpfc_hba *phba)
{
        struct lpfc_cq_event *cq_event;
        unsigned long iflags;

        spin_lock_irqsave(&phba->hbalock, iflags);
        cq_event = __lpfc_sli4_cq_event_alloc(phba);
        spin_unlock_irqrestore(&phba->hbalock, iflags);
        return cq_event;
}

/**
 * __lpfc_sli4_cq_event_release - Release a completion-queue event to free pool
 * @phba: pointer to lpfc hba data structure.
 * @cq_event: pointer to the completion queue event to be freed.
 *
 * This routine is the lock free version of the API invoked to release a
 * completion-queue event back into the free pool.
 **/
void
__lpfc_sli4_cq_event_release(struct lpfc_hba *phba,
                             struct lpfc_cq_event *cq_event)
{
        list_add_tail(&cq_event->list, &phba->sli4_hba.sp_cqe_event_pool);
}

/**
 * lpfc_sli4_cq_event_release - Release a completion-queue event to free pool
 * @phba: pointer to lpfc hba data structure.
 * @cq_event: pointer to the completion queue event to be freed.
 *
 * This routine is the lock version of the API invoked to release a
 * completion-queue event back into the free pool.
 **/
void
lpfc_sli4_cq_event_release(struct lpfc_hba *phba,
                           struct lpfc_cq_event *cq_event)
{
        unsigned long iflags;
        spin_lock_irqsave(&phba->hbalock, iflags);
        __lpfc_sli4_cq_event_release(phba, cq_event);
        spin_unlock_irqrestore(&phba->hbalock, iflags);
}

/**
 * lpfc_sli4_cq_event_release_all - Release all cq events to the free pool
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is to free all the pending completion-queue events to the
 * back into the free pool for device reset.
 **/
static void
lpfc_sli4_cq_event_release_all(struct lpfc_hba *phba)
{
        LIST_HEAD(cqelist);
        struct lpfc_cq_event *cqe;
        unsigned long iflags;

        /* Retrieve all the pending WCQEs from pending WCQE lists */
        spin_lock_irqsave(&phba->hbalock, iflags);
        /* Pending FCP XRI abort events */
        list_splice_init(&phba->sli4_hba.sp_fcp_xri_aborted_work_queue,
                         &cqelist);
        /* Pending ELS XRI abort events */
        list_splice_init(&phba->sli4_hba.sp_els_xri_aborted_work_queue,
                         &cqelist);
        /* Pending asynnc events */
        list_splice_init(&phba->sli4_hba.sp_asynce_work_queue,
                         &cqelist);
        spin_unlock_irqrestore(&phba->hbalock, iflags);

        while (!list_empty(&cqelist)) {
                list_remove_head(&cqelist, cqe, struct lpfc_cq_event, list);
                lpfc_sli4_cq_event_release(phba, cqe);
        }
}

/**
 * lpfc_pci_function_reset - Reset pci function.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to request a PCI function reset. It will destroys
 * all resources assigned to the PCI function which originates this request.
 *
 * Return codes
 *      0 - successful
 *      ENOMEM - No availble memory
 *      EIO - The mailbox failed to complete successfully.
 **/
int
lpfc_pci_function_reset(struct lpfc_hba *phba)
{
        LPFC_MBOXQ_t *mboxq;
        uint32_t rc = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        mboxq = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0494 Unable to allocate memory for issuing "
                                "SLI_FUNCTION_RESET mailbox command\n");
                return -ENOMEM;
        }

        /* Set up PCI function reset SLI4_CONFIG mailbox-ioctl command */
        lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_FUNCTION_RESET, 0,
                         LPFC_SLI4_MBX_EMBED);
        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        shdr = (union lpfc_sli4_cfg_shdr *)
                &mboxq->u.mqe.un.sli4_config.header.cfg_shdr;
        shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
        shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
        if (rc != MBX_TIMEOUT)
                mempool_free(mboxq, phba->mbox_mem_pool);
        if (shdr_status || shdr_add_status || rc) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0495 SLI_FUNCTION_RESET mailbox failed with "
                                "status x%x add_status x%x, mbx status x%x\n",
                                shdr_status, shdr_add_status, rc);
                rc = -ENXIO;
        }
        return rc;
}

/**
 * lpfc_sli4_send_nop_mbox_cmds - Send sli-4 nop mailbox commands
 * @phba: pointer to lpfc hba data structure.
 * @cnt: number of nop mailbox commands to send.
 *
 * This routine is invoked to send a number @cnt of NOP mailbox command and
 * wait for each command to complete.
 *
 * Return: the number of NOP mailbox command completed.
 **/
static int
lpfc_sli4_send_nop_mbox_cmds(struct lpfc_hba *phba, uint32_t cnt)
{
        LPFC_MBOXQ_t *mboxq;
        int length, cmdsent;
        uint32_t mbox_tmo;
        uint32_t rc = 0;
        uint32_t shdr_status, shdr_add_status;
        union lpfc_sli4_cfg_shdr *shdr;

        if (cnt == 0) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "2518 Requested to send 0 NOP mailbox cmd\n");
                return cnt;
        }

        mboxq = (LPFC_MBOXQ_t *)mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mboxq) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2519 Unable to allocate memory for issuing "
                                "NOP mailbox command\n");
                return 0;
        }

        /* Set up NOP SLI4_CONFIG mailbox-ioctl command */
        length = (sizeof(struct lpfc_mbx_nop) -
                  sizeof(struct lpfc_sli4_cfg_mhdr));
        lpfc_sli4_config(phba, mboxq, LPFC_MBOX_SUBSYSTEM_COMMON,
                         LPFC_MBOX_OPCODE_NOP, length, LPFC_SLI4_MBX_EMBED);

        mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_SLI4_CONFIG);
        for (cmdsent = 0; cmdsent < cnt; cmdsent++) {
                if (!phba->sli4_hba.intr_enable)
                        rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
                else
                        rc = lpfc_sli_issue_mbox_wait(phba, mboxq, mbox_tmo);
                if (rc == MBX_TIMEOUT)
                        break;
                /* Check return status */
                shdr = (union lpfc_sli4_cfg_shdr *)
                        &mboxq->u.mqe.un.sli4_config.header.cfg_shdr;
                shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
                shdr_add_status = bf_get(lpfc_mbox_hdr_add_status,
                                         &shdr->response);
                if (shdr_status || shdr_add_status || rc) {
                        lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                        "2520 NOP mailbox command failed "
                                        "status x%x add_status x%x mbx "
                                        "status x%x\n", shdr_status,
                                        shdr_add_status, rc);
                        break;
                }
        }

        if (rc != MBX_TIMEOUT)
                mempool_free(mboxq, phba->mbox_mem_pool);

        return cmdsent;
}

/**
 * lpfc_sli4_fcfi_unreg - Unregister fcfi to device
 * @phba: pointer to lpfc hba data structure.
 * @fcfi: fcf index.
 *
 * This routine is invoked to unregister a FCFI from device.
 **/
void
lpfc_sli4_fcfi_unreg(struct lpfc_hba *phba, uint16_t fcfi)
{
        LPFC_MBOXQ_t *mbox;
        uint32_t mbox_tmo;
        int rc;
        unsigned long flags;

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);

        if (!mbox)
                return;

        lpfc_unreg_fcfi(mbox, fcfi);

        if (!phba->sli4_hba.intr_enable)
                rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        else {
                mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_SLI4_CONFIG);
                rc = lpfc_sli_issue_mbox_wait(phba, mbox, mbox_tmo);
        }
        if (rc != MBX_TIMEOUT)
                mempool_free(mbox, phba->mbox_mem_pool);
        if (rc != MBX_SUCCESS)
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2517 Unregister FCFI command failed "
                                "status %d, mbxStatus x%x\n", rc,
                                bf_get(lpfc_mqe_status, &mbox->u.mqe));
        else {
                spin_lock_irqsave(&phba->hbalock, flags);
                /* Mark the FCFI is no longer registered */
                phba->fcf.fcf_flag &=
                        ~(FCF_AVAILABLE | FCF_REGISTERED | FCF_SCAN_DONE);
                spin_unlock_irqrestore(&phba->hbalock, flags);
        }
}

/**
 * lpfc_sli4_pci_mem_setup - Setup SLI4 HBA PCI memory space.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to set up the PCI device memory space for device
 * with SLI-4 interface spec.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_sli4_pci_mem_setup(struct lpfc_hba *phba)
{
        struct pci_dev *pdev;
        unsigned long bar0map_len, bar1map_len, bar2map_len;
        int error = -ENODEV;

        /* Obtain PCI device reference */
        if (!phba->pcidev)
                return error;
        else
                pdev = phba->pcidev;

        /* Set the device DMA mask size */
        if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0
         || pci_set_consistent_dma_mask(pdev,DMA_BIT_MASK(64)) != 0) {
                if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0
                 || pci_set_consistent_dma_mask(pdev,DMA_BIT_MASK(32)) != 0) {
                        return error;
                }
        }

        /* Get the bus address of SLI4 device Bar0, Bar1, and Bar2 and the
         * number of bytes required by each mapping. They are actually
         * mapping to the PCI BAR regions 0 or 1, 2, and 4 by the SLI4 device.
         */
        if (pci_resource_start(pdev, 0)) {
                phba->pci_bar0_map = pci_resource_start(pdev, 0);
                bar0map_len = pci_resource_len(pdev, 0);
        } else {
                phba->pci_bar0_map = pci_resource_start(pdev, 1);
                bar0map_len = pci_resource_len(pdev, 1);
        }
        phba->pci_bar1_map = pci_resource_start(pdev, 2);
        bar1map_len = pci_resource_len(pdev, 2);

        phba->pci_bar2_map = pci_resource_start(pdev, 4);
        bar2map_len = pci_resource_len(pdev, 4);

        /* Map SLI4 PCI Config Space Register base to a kernel virtual addr */
        phba->sli4_hba.conf_regs_memmap_p =
                                ioremap(phba->pci_bar0_map, bar0map_len);
        if (!phba->sli4_hba.conf_regs_memmap_p) {
                dev_printk(KERN_ERR, &pdev->dev,
                           "ioremap failed for SLI4 PCI config registers.\n");
                goto out;
        }

        /* Map SLI4 HBA Control Register base to a kernel virtual address. */
        phba->sli4_hba.ctrl_regs_memmap_p =
                                ioremap(phba->pci_bar1_map, bar1map_len);
        if (!phba->sli4_hba.ctrl_regs_memmap_p) {
                dev_printk(KERN_ERR, &pdev->dev,
                           "ioremap failed for SLI4 HBA control registers.\n");
                goto out_iounmap_conf;
        }

        /* Map SLI4 HBA Doorbell Register base to a kernel virtual address. */
        phba->sli4_hba.drbl_regs_memmap_p =
                                ioremap(phba->pci_bar2_map, bar2map_len);
        if (!phba->sli4_hba.drbl_regs_memmap_p) {
                dev_printk(KERN_ERR, &pdev->dev,
                           "ioremap failed for SLI4 HBA doorbell registers.\n");
                goto out_iounmap_ctrl;
        }

        /* Set up BAR0 PCI config space register memory map */
        lpfc_sli4_bar0_register_memmap(phba);

        /* Set up BAR1 register memory map */
        lpfc_sli4_bar1_register_memmap(phba);

        /* Set up BAR2 register memory map */
        error = lpfc_sli4_bar2_register_memmap(phba, LPFC_VF0);
        if (error)
                goto out_iounmap_all;

        return 0;

out_iounmap_all:
        iounmap(phba->sli4_hba.drbl_regs_memmap_p);
out_iounmap_ctrl:
        iounmap(phba->sli4_hba.ctrl_regs_memmap_p);
out_iounmap_conf:
        iounmap(phba->sli4_hba.conf_regs_memmap_p);
out:
        return error;
}

/**
 * lpfc_sli4_pci_mem_unset - Unset SLI4 HBA PCI memory space.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset the PCI device memory space for device
 * with SLI-4 interface spec.
 **/
static void
lpfc_sli4_pci_mem_unset(struct lpfc_hba *phba)
{
        struct pci_dev *pdev;

        /* Obtain PCI device reference */
        if (!phba->pcidev)
                return;
        else
                pdev = phba->pcidev;

        /* Free coherent DMA memory allocated */

        /* Unmap I/O memory space */
        iounmap(phba->sli4_hba.drbl_regs_memmap_p);
        iounmap(phba->sli4_hba.ctrl_regs_memmap_p);
        iounmap(phba->sli4_hba.conf_regs_memmap_p);

        return;
}

/**
 * lpfc_sli_enable_msix - Enable MSI-X interrupt mode on SLI-3 device
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to enable the MSI-X interrupt vectors to device
 * with SLI-3 interface specs. The kernel function pci_enable_msix() is
 * called to enable the MSI-X vectors. Note that pci_enable_msix(), once
 * invoked, enables either all or nothing, depending on the current
 * availability of PCI vector resources. The device driver is responsible
 * for calling the individual request_irq() to register each MSI-X vector
 * with a interrupt handler, which is done in this function. Note that
 * later when device is unloading, the driver should always call free_irq()
 * on all MSI-X vectors it has done request_irq() on before calling
 * pci_disable_msix(). Failure to do so results in a BUG_ON() and a device
 * will be left with MSI-X enabled and leaks its vectors.
 *
 * Return codes
 *   0 - successful
 *   other values - error
 **/
static int
lpfc_sli_enable_msix(struct lpfc_hba *phba)
{
        int rc, i;
        LPFC_MBOXQ_t *pmb;

        /* Set up MSI-X multi-message vectors */
        for (i = 0; i < LPFC_MSIX_VECTORS; i++)
                phba->msix_entries[i].entry = i;

        /* Configure MSI-X capability structure */
        rc = pci_enable_msix(phba->pcidev, phba->msix_entries,
                                ARRAY_SIZE(phba->msix_entries));
        if (rc) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0420 PCI enable MSI-X failed (%d)\n", rc);
                goto msi_fail_out;
        }
        for (i = 0; i < LPFC_MSIX_VECTORS; i++)
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0477 MSI-X entry[%d]: vector=x%x "
                                "message=%d\n", i,
                                phba->msix_entries[i].vector,
                                phba->msix_entries[i].entry);
        /*
         * Assign MSI-X vectors to interrupt handlers
         */

        /* vector-0 is associated to slow-path handler */
        rc = request_irq(phba->msix_entries[0].vector,
                         &lpfc_sli_sp_intr_handler, IRQF_SHARED,
                         LPFC_SP_DRIVER_HANDLER_NAME, phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "0421 MSI-X slow-path request_irq failed "
                                "(%d)\n", rc);
                goto msi_fail_out;
        }

        /* vector-1 is associated to fast-path handler */
        rc = request_irq(phba->msix_entries[1].vector,
                         &lpfc_sli_fp_intr_handler, IRQF_SHARED,
                         LPFC_FP_DRIVER_HANDLER_NAME, phba);

        if (rc) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "0429 MSI-X fast-path request_irq failed "
                                "(%d)\n", rc);
                goto irq_fail_out;
        }

        /*
         * Configure HBA MSI-X attention conditions to messages
         */
        pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);

        if (!pmb) {
                rc = -ENOMEM;
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0474 Unable to allocate memory for issuing "
                                "MBOX_CONFIG_MSI command\n");
                goto mem_fail_out;
        }
        rc = lpfc_config_msi(phba, pmb);
        if (rc)
                goto mbx_fail_out;
        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
        if (rc != MBX_SUCCESS) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX,
                                "0351 Config MSI mailbox command failed, "
                                "mbxCmd x%x, mbxStatus x%x\n",
                                pmb->u.mb.mbxCommand, pmb->u.mb.mbxStatus);
                goto mbx_fail_out;
        }

        /* Free memory allocated for mailbox command */
        mempool_free(pmb, phba->mbox_mem_pool);
        return rc;

mbx_fail_out:
        /* Free memory allocated for mailbox command */
        mempool_free(pmb, phba->mbox_mem_pool);

mem_fail_out:
        /* free the irq already requested */
        free_irq(phba->msix_entries[1].vector, phba);

irq_fail_out:
        /* free the irq already requested */
        free_irq(phba->msix_entries[0].vector, phba);

msi_fail_out:
        /* Unconfigure MSI-X capability structure */
        pci_disable_msix(phba->pcidev);
        return rc;
}

/**
 * lpfc_sli_disable_msix - Disable MSI-X interrupt mode on SLI-3 device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to release the MSI-X vectors and then disable the
 * MSI-X interrupt mode to device with SLI-3 interface spec.
 **/
static void
lpfc_sli_disable_msix(struct lpfc_hba *phba)
{
        int i;

        /* Free up MSI-X multi-message vectors */
        for (i = 0; i < LPFC_MSIX_VECTORS; i++)
                free_irq(phba->msix_entries[i].vector, phba);
        /* Disable MSI-X */
        pci_disable_msix(phba->pcidev);

        return;
}

/**
 * lpfc_sli_enable_msi - Enable MSI interrupt mode on SLI-3 device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to enable the MSI interrupt mode to device with
 * SLI-3 interface spec. The kernel function pci_enable_msi() is called to
 * enable the MSI vector. The device driver is responsible for calling the
 * request_irq() to register MSI vector with a interrupt the handler, which
 * is done in this function.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 */
static int
lpfc_sli_enable_msi(struct lpfc_hba *phba)
{
        int rc;

        rc = pci_enable_msi(phba->pcidev);
        if (!rc)
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0462 PCI enable MSI mode success.\n");
        else {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0471 PCI enable MSI mode failed (%d)\n", rc);
                return rc;
        }

        rc = request_irq(phba->pcidev->irq, lpfc_sli_intr_handler,
                         IRQF_SHARED, LPFC_DRIVER_NAME, phba);
        if (rc) {
                pci_disable_msi(phba->pcidev);
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "0478 MSI request_irq failed (%d)\n", rc);
        }
        return rc;
}

/**
 * lpfc_sli_disable_msi - Disable MSI interrupt mode to SLI-3 device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to disable the MSI interrupt mode to device with
 * SLI-3 interface spec. The driver calls free_irq() on MSI vector it has
 * done request_irq() on before calling pci_disable_msi(). Failure to do so
 * results in a BUG_ON() and a device will be left with MSI enabled and leaks
 * its vector.
 */
static void
lpfc_sli_disable_msi(struct lpfc_hba *phba)
{
        free_irq(phba->pcidev->irq, phba);
        pci_disable_msi(phba->pcidev);
        return;
}

/**
 * lpfc_sli_enable_intr - Enable device interrupt to SLI-3 device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to enable device interrupt and associate driver's
 * interrupt handler(s) to interrupt vector(s) to device with SLI-3 interface
 * spec. Depends on the interrupt mode configured to the driver, the driver
 * will try to fallback from the configured interrupt mode to an interrupt
 * mode which is supported by the platform, kernel, and device in the order
 * of:
 * MSI-X -> MSI -> IRQ.
 *
 * Return codes
 *   0 - successful
 *   other values - error
 **/
static uint32_t
lpfc_sli_enable_intr(struct lpfc_hba *phba, uint32_t cfg_mode)
{
        uint32_t intr_mode = LPFC_INTR_ERROR;
        int retval;

        if (cfg_mode == 2) {
                /* Need to issue conf_port mbox cmd before conf_msi mbox cmd */
                retval = lpfc_sli_config_port(phba, LPFC_SLI_REV3);
                if (!retval) {
                        /* Now, try to enable MSI-X interrupt mode */
                        retval = lpfc_sli_enable_msix(phba);
                        if (!retval) {
                                /* Indicate initialization to MSI-X mode */
                                phba->intr_type = MSIX;
                                intr_mode = 2;
                        }
                }
        }

        /* Fallback to MSI if MSI-X initialization failed */
        if (cfg_mode >= 1 && phba->intr_type == NONE) {
                retval = lpfc_sli_enable_msi(phba);
                if (!retval) {
                        /* Indicate initialization to MSI mode */
                        phba->intr_type = MSI;
                        intr_mode = 1;
                }
        }

        /* Fallback to INTx if both MSI-X/MSI initalization failed */
        if (phba->intr_type == NONE) {
                retval = request_irq(phba->pcidev->irq, lpfc_sli_intr_handler,
                                     IRQF_SHARED, LPFC_DRIVER_NAME, phba);
                if (!retval) {
                        /* Indicate initialization to INTx mode */
                        phba->intr_type = INTx;
                        intr_mode = 0;
                }
        }
        return intr_mode;
}

/**
 * lpfc_sli_disable_intr - Disable device interrupt to SLI-3 device.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to disable device interrupt and disassociate the
 * driver's interrupt handler(s) from interrupt vector(s) to device with
 * SLI-3 interface spec. Depending on the interrupt mode, the driver will
 * release the interrupt vector(s) for the message signaled interrupt.
 **/
static void
lpfc_sli_disable_intr(struct lpfc_hba *phba)
{
        /* Disable the currently initialized interrupt mode */
        if (phba->intr_type == MSIX)
                lpfc_sli_disable_msix(phba);
        else if (phba->intr_type == MSI)
                lpfc_sli_disable_msi(phba);
        else if (phba->intr_type == INTx)
                free_irq(phba->pcidev->irq, phba);

        /* Reset interrupt management states */
        phba->intr_type = NONE;
        phba->sli.slistat.sli_intr = 0;

        return;
}

/**
 * lpfc_sli4_enable_msix - Enable MSI-X interrupt mode to SLI-4 device
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to enable the MSI-X interrupt vectors to device
 * with SLI-4 interface spec. The kernel function pci_enable_msix() is called
 * to enable the MSI-X vectors. Note that pci_enable_msix(), once invoked,
 * enables either all or nothing, depending on the current availability of
 * PCI vector resources. The device driver is responsible for calling the
 * individual request_irq() to register each MSI-X vector with a interrupt
 * handler, which is done in this function. Note that later when device is
 * unloading, the driver should always call free_irq() on all MSI-X vectors
 * it has done request_irq() on before calling pci_disable_msix(). Failure
 * to do so results in a BUG_ON() and a device will be left with MSI-X
 * enabled and leaks its vectors.
 *
 * Return codes
 * 0 - successful
 * other values - error
 **/
static int
lpfc_sli4_enable_msix(struct lpfc_hba *phba)
{
        int rc, index;

        /* Set up MSI-X multi-message vectors */
        for (index = 0; index < phba->sli4_hba.cfg_eqn; index++)
                phba->sli4_hba.msix_entries[index].entry = index;

        /* Configure MSI-X capability structure */
        rc = pci_enable_msix(phba->pcidev, phba->sli4_hba.msix_entries,
                             phba->sli4_hba.cfg_eqn);
        if (rc) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0484 PCI enable MSI-X failed (%d)\n", rc);
                goto msi_fail_out;
        }
        /* Log MSI-X vector assignment */
        for (index = 0; index < phba->sli4_hba.cfg_eqn; index++)
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0489 MSI-X entry[%d]: vector=x%x "
                                "message=%d\n", index,
                                phba->sli4_hba.msix_entries[index].vector,
                                phba->sli4_hba.msix_entries[index].entry);
        /*
         * Assign MSI-X vectors to interrupt handlers
         */

        /* The first vector must associated to slow-path handler for MQ */
        rc = request_irq(phba->sli4_hba.msix_entries[0].vector,
                         &lpfc_sli4_sp_intr_handler, IRQF_SHARED,
                         LPFC_SP_DRIVER_HANDLER_NAME, phba);
        if (rc) {
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "0485 MSI-X slow-path request_irq failed "
                                "(%d)\n", rc);
                goto msi_fail_out;
        }

        /* The rest of the vector(s) are associated to fast-path handler(s) */
        for (index = 1; index < phba->sli4_hba.cfg_eqn; index++) {
                phba->sli4_hba.fcp_eq_hdl[index - 1].idx = index - 1;
                phba->sli4_hba.fcp_eq_hdl[index - 1].phba = phba;
                rc = request_irq(phba->sli4_hba.msix_entries[index].vector,
                                 &lpfc_sli4_fp_intr_handler, IRQF_SHARED,
                                 LPFC_FP_DRIVER_HANDLER_NAME,
                                 &phba->sli4_hba.fcp_eq_hdl[index - 1]);
                if (rc) {
                        lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                        "0486 MSI-X fast-path (%d) "
                                        "request_irq failed (%d)\n", index, rc);
                        goto cfg_fail_out;
                }
        }

        return rc;

cfg_fail_out:
        /* free the irq already requested */
        for (--index; index >= 1; index--)
                free_irq(phba->sli4_hba.msix_entries[index - 1].vector,
                         &phba->sli4_hba.fcp_eq_hdl[index - 1]);

        /* free the irq already requested */
        free_irq(phba->sli4_hba.msix_entries[0].vector, phba);

msi_fail_out:
        /* Unconfigure MSI-X capability structure */
        pci_disable_msix(phba->pcidev);
        return rc;
}

/**
 * lpfc_sli4_disable_msix - Disable MSI-X interrupt mode to SLI-4 device
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to release the MSI-X vectors and then disable the
 * MSI-X interrupt mode to device with SLI-4 interface spec.
 **/
static void
lpfc_sli4_disable_msix(struct lpfc_hba *phba)
{
        int index;

        /* Free up MSI-X multi-message vectors */
        free_irq(phba->sli4_hba.msix_entries[0].vector, phba);

        for (index = 1; index < phba->sli4_hba.cfg_eqn; index++)
                free_irq(phba->sli4_hba.msix_entries[index].vector,
                         &phba->sli4_hba.fcp_eq_hdl[index - 1]);
        /* Disable MSI-X */
        pci_disable_msix(phba->pcidev);

        return;
}

/**
 * lpfc_sli4_enable_msi - Enable MSI interrupt mode to SLI-4 device
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to enable the MSI interrupt mode to device with
 * SLI-4 interface spec. The kernel function pci_enable_msi() is called
 * to enable the MSI vector. The device driver is responsible for calling
 * the request_irq() to register MSI vector with a interrupt the handler,
 * which is done in this function.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static int
lpfc_sli4_enable_msi(struct lpfc_hba *phba)
{
        int rc, index;

        rc = pci_enable_msi(phba->pcidev);
        if (!rc)
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0487 PCI enable MSI mode success.\n");
        else {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0488 PCI enable MSI mode failed (%d)\n", rc);
                return rc;
        }

        rc = request_irq(phba->pcidev->irq, lpfc_sli4_intr_handler,
                         IRQF_SHARED, LPFC_DRIVER_NAME, phba);
        if (rc) {
                pci_disable_msi(phba->pcidev);
                lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                "0490 MSI request_irq failed (%d)\n", rc);
        }

        for (index = 0; index < phba->cfg_fcp_eq_count; index++) {
                phba->sli4_hba.fcp_eq_hdl[index].idx = index;
                phba->sli4_hba.fcp_eq_hdl[index].phba = phba;
        }

        return rc;
}

/**
 * lpfc_sli4_disable_msi - Disable MSI interrupt mode to SLI-4 device
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to disable the MSI interrupt mode to device with
 * SLI-4 interface spec. The driver calls free_irq() on MSI vector it has
 * done request_irq() on before calling pci_disable_msi(). Failure to do so
 * results in a BUG_ON() and a device will be left with MSI enabled and leaks
 * its vector.
 **/
static void
lpfc_sli4_disable_msi(struct lpfc_hba *phba)
{
        free_irq(phba->pcidev->irq, phba);
        pci_disable_msi(phba->pcidev);
        return;
}

/**
 * lpfc_sli4_enable_intr - Enable device interrupt to SLI-4 device
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to enable device interrupt and associate driver's
 * interrupt handler(s) to interrupt vector(s) to device with SLI-4
 * interface spec. Depends on the interrupt mode configured to the driver,
 * the driver will try to fallback from the configured interrupt mode to an
 * interrupt mode which is supported by the platform, kernel, and device in
 * the order of:
 * MSI-X -> MSI -> IRQ.
 *
 * Return codes
 *      0 - successful
 *      other values - error
 **/
static uint32_t
lpfc_sli4_enable_intr(struct lpfc_hba *phba, uint32_t cfg_mode)
{
        uint32_t intr_mode = LPFC_INTR_ERROR;
        int retval, index;

        if (cfg_mode == 2) {
                /* Preparation before conf_msi mbox cmd */
                retval = 0;
                if (!retval) {
                        /* Now, try to enable MSI-X interrupt mode */
                        retval = lpfc_sli4_enable_msix(phba);
                        if (!retval) {
                                /* Indicate initialization to MSI-X mode */
                                phba->intr_type = MSIX;
                                intr_mode = 2;
                        }
                }
        }

        /* Fallback to MSI if MSI-X initialization failed */
        if (cfg_mode >= 1 && phba->intr_type == NONE) {
                retval = lpfc_sli4_enable_msi(phba);
                if (!retval) {
                        /* Indicate initialization to MSI mode */
                        phba->intr_type = MSI;
                        intr_mode = 1;
                }
        }

        /* Fallback to INTx if both MSI-X/MSI initalization failed */
        if (phba->intr_type == NONE) {
                retval = request_irq(phba->pcidev->irq, lpfc_sli4_intr_handler,
                                     IRQF_SHARED, LPFC_DRIVER_NAME, phba);
                if (!retval) {
                        /* Indicate initialization to INTx mode */
                        phba->intr_type = INTx;
                        intr_mode = 0;
                        for (index = 0; index < phba->cfg_fcp_eq_count;
                             index++) {
                                phba->sli4_hba.fcp_eq_hdl[index].idx = index;
                                phba->sli4_hba.fcp_eq_hdl[index].phba = phba;
                        }
                }
        }
        return intr_mode;
}

/**
 * lpfc_sli4_disable_intr - Disable device interrupt to SLI-4 device
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to disable device interrupt and disassociate
 * the driver's interrupt handler(s) from interrupt vector(s) to device
 * with SLI-4 interface spec. Depending on the interrupt mode, the driver
 * will release the interrupt vector(s) for the message signaled interrupt.
 **/
static void
lpfc_sli4_disable_intr(struct lpfc_hba *phba)
{
        /* Disable the currently initialized interrupt mode */
        if (phba->intr_type == MSIX)
                lpfc_sli4_disable_msix(phba);
        else if (phba->intr_type == MSI)
                lpfc_sli4_disable_msi(phba);
        else if (phba->intr_type == INTx)
                free_irq(phba->pcidev->irq, phba);

        /* Reset interrupt management states */
        phba->intr_type = NONE;
        phba->sli.slistat.sli_intr = 0;

        return;
}

/**
 * lpfc_unset_hba - Unset SLI3 hba device initialization
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset the HBA device initialization steps to
 * a device with SLI-3 interface spec.
 **/
static void
lpfc_unset_hba(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;
        struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);

        spin_lock_irq(shost->host_lock);
        vport->load_flag |= FC_UNLOADING;
        spin_unlock_irq(shost->host_lock);

        lpfc_stop_hba_timers(phba);

        phba->pport->work_port_events = 0;

        lpfc_sli_hba_down(phba);

        lpfc_sli_brdrestart(phba);

        lpfc_sli_disable_intr(phba);

        return;
}

/**
 * lpfc_sli4_unset_hba - Unset SLI4 hba device initialization.
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is invoked to unset the HBA device initialization steps to
 * a device with SLI-4 interface spec.
 **/
static void
lpfc_sli4_unset_hba(struct lpfc_hba *phba)
{
        struct lpfc_vport *vport = phba->pport;
        struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);

        spin_lock_irq(shost->host_lock);
        vport->load_flag |= FC_UNLOADING;
        spin_unlock_irq(shost->host_lock);

        phba->pport->work_port_events = 0;

        lpfc_sli4_hba_down(phba);

        lpfc_sli4_disable_intr(phba);

        return;
}

/**
 * lpfc_sli4_hba_unset - Unset the fcoe hba
 * @phba: Pointer to HBA context object.
 *
 * This function is called in the SLI4 code path to reset the HBA's FCoE
 * function. The caller is not required to hold any lock. This routine
 * issues PCI function reset mailbox command to reset the FCoE function.
 * At the end of the function, it calls lpfc_hba_down_post function to
 * free any pending commands.
 **/
static void
lpfc_sli4_hba_unset(struct lpfc_hba *phba)
{
        int wait_cnt = 0;
        LPFC_MBOXQ_t *mboxq;

        lpfc_stop_hba_timers(phba);
        phba->sli4_hba.intr_enable = 0;

        /*
         * Gracefully wait out the potential current outstanding asynchronous
         * mailbox command.
         */

        /* First, block any pending async mailbox command from posted */
        spin_lock_irq(&phba->hbalock);
        phba->sli.sli_flag |= LPFC_SLI_ASYNC_MBX_BLK;
        spin_unlock_irq(&phba->hbalock);
        /* Now, trying to wait it out if we can */
        while (phba->sli.sli_flag & LPFC_SLI_MBOX_ACTIVE) {
                msleep(10);
                if (++wait_cnt > LPFC_ACTIVE_MBOX_WAIT_CNT)
                        break;
        }
        /* Forcefully release the outstanding mailbox command if timed out */
        if (phba->sli.sli_flag & LPFC_SLI_MBOX_ACTIVE) {
                spin_lock_irq(&phba->hbalock);
                mboxq = phba->sli.mbox_active;
                mboxq->u.mb.mbxStatus = MBX_NOT_FINISHED;
                __lpfc_mbox_cmpl_put(phba, mboxq);
                phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                phba->sli.mbox_active = NULL;
                spin_unlock_irq(&phba->hbalock);
        }

        /* Tear down the queues in the HBA */
        lpfc_sli4_queue_unset(phba);

        /* Disable PCI subsystem interrupt */
        lpfc_sli4_disable_intr(phba);

        /* Stop kthread signal shall trigger work_done one more time */
        kthread_stop(phba->worker_thread);

        /* Stop the SLI4 device port */
        phba->pport->work_port_events = 0;
}

 /**
 * lpfc_pc_sli4_params_get - Get the SLI4_PARAMS port capabilities.
 * @phba: Pointer to HBA context object.
 * @mboxq: Pointer to the mailboxq memory for the mailbox command response.
 *
 * This function is called in the SLI4 code path to read the port's
 * sli4 capabilities.
 *
 * This function may be be called from any context that can block-wait
 * for the completion.  The expectation is that this routine is called
 * typically from probe_one or from the online routine.
 **/
int
lpfc_pc_sli4_params_get(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
{
        int rc;
        struct lpfc_mqe *mqe;
        struct lpfc_pc_sli4_params *sli4_params;
        uint32_t mbox_tmo;

        rc = 0;
        mqe = &mboxq->u.mqe;

        /* Read the port's SLI4 Parameters port capabilities */
        lpfc_sli4_params(mboxq);
        if (!phba->sli4_hba.intr_enable)
                rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_POLL);
        else {
                mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_PORT_CAPABILITIES);
                rc = lpfc_sli_issue_mbox_wait(phba, mboxq, mbox_tmo);
        }

        if (unlikely(rc))
                return 1;

        sli4_params = &phba->sli4_hba.pc_sli4_params;
        sli4_params->if_type = bf_get(if_type, &mqe->un.sli4_params);
        sli4_params->sli_rev = bf_get(sli_rev, &mqe->un.sli4_params);
        sli4_params->sli_family = bf_get(sli_family, &mqe->un.sli4_params);
        sli4_params->featurelevel_1 = bf_get(featurelevel_1,
                                             &mqe->un.sli4_params);
        sli4_params->featurelevel_2 = bf_get(featurelevel_2,
                                             &mqe->un.sli4_params);
        sli4_params->proto_types = mqe->un.sli4_params.word3;
        sli4_params->sge_supp_len = mqe->un.sli4_params.sge_supp_len;
        sli4_params->if_page_sz = bf_get(if_page_sz, &mqe->un.sli4_params);
        sli4_params->rq_db_window = bf_get(rq_db_window, &mqe->un.sli4_params);
        sli4_params->loopbk_scope = bf_get(loopbk_scope, &mqe->un.sli4_params);
        sli4_params->eq_pages_max = bf_get(eq_pages, &mqe->un.sli4_params);
        sli4_params->eqe_size = bf_get(eqe_size, &mqe->un.sli4_params);
        sli4_params->cq_pages_max = bf_get(cq_pages, &mqe->un.sli4_params);
        sli4_params->cqe_size = bf_get(cqe_size, &mqe->un.sli4_params);
        sli4_params->mq_pages_max = bf_get(mq_pages, &mqe->un.sli4_params);
        sli4_params->mqe_size = bf_get(mqe_size, &mqe->un.sli4_params);
        sli4_params->mq_elem_cnt = bf_get(mq_elem_cnt, &mqe->un.sli4_params);
        sli4_params->wq_pages_max = bf_get(wq_pages, &mqe->un.sli4_params);
        sli4_params->wqe_size = bf_get(wqe_size, &mqe->un.sli4_params);
        sli4_params->rq_pages_max = bf_get(rq_pages, &mqe->un.sli4_params);
        sli4_params->rqe_size = bf_get(rqe_size, &mqe->un.sli4_params);
        sli4_params->hdr_pages_max = bf_get(hdr_pages, &mqe->un.sli4_params);
        sli4_params->hdr_size = bf_get(hdr_size, &mqe->un.sli4_params);
        sli4_params->hdr_pp_align = bf_get(hdr_pp_align, &mqe->un.sli4_params);
        sli4_params->sgl_pages_max = bf_get(sgl_pages, &mqe->un.sli4_params);
        sli4_params->sgl_pp_align = bf_get(sgl_pp_align, &mqe->un.sli4_params);
        return rc;
}

/**
 * lpfc_pci_probe_one_s3 - PCI probe func to reg SLI-3 device to PCI subsystem.
 * @pdev: pointer to PCI device
 * @pid: pointer to PCI device identifier
 *
 * This routine is to be called to attach a device with SLI-3 interface spec
 * to the PCI subsystem. When an Emulex HBA with SLI-3 interface spec is
 * presented on PCI bus, the kernel PCI subsystem looks at PCI device-specific
 * information of the device and driver to see if the driver state that it can
 * support this kind of device. If the match is successful, the driver core
 * invokes this routine. If this routine determines it can claim the HBA, it
 * does all the initialization that it needs to do to handle the HBA properly.
 *
 * Return code
 *      0 - driver can claim the device
 *      negative value - driver can not claim the device
 **/
static int __devinit
lpfc_pci_probe_one_s3(struct pci_dev *pdev, const struct pci_device_id *pid)
{
        struct lpfc_hba   *phba;
        struct lpfc_vport *vport = NULL;
        struct Scsi_Host  *shost = NULL;
        int error;
        uint32_t cfg_mode, intr_mode;

        /* Allocate memory for HBA structure */
        phba = lpfc_hba_alloc(pdev);
        if (!phba)
                return -ENOMEM;

        /* Perform generic PCI device enabling operation */
        error = lpfc_enable_pci_dev(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1401 Failed to enable pci device.\n");
                goto out_free_phba;
        }

        /* Set up SLI API function jump table for PCI-device group-0 HBAs */
        error = lpfc_api_table_setup(phba, LPFC_PCI_DEV_LP);
        if (error)
                goto out_disable_pci_dev;

        /* Set up SLI-3 specific device PCI memory space */
        error = lpfc_sli_pci_mem_setup(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1402 Failed to set up pci memory space.\n");
                goto out_disable_pci_dev;
        }

        /* Set up phase-1 common device driver resources */
        error = lpfc_setup_driver_resource_phase1(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1403 Failed to set up driver resource.\n");
                goto out_unset_pci_mem_s3;
        }

        /* Set up SLI-3 specific device driver resources */
        error = lpfc_sli_driver_resource_setup(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1404 Failed to set up driver resource.\n");
                goto out_unset_pci_mem_s3;
        }

        /* Initialize and populate the iocb list per host */
        error = lpfc_init_iocb_list(phba, LPFC_IOCB_LIST_CNT);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1405 Failed to initialize iocb list.\n");
                goto out_unset_driver_resource_s3;
        }

        /* Set up common device driver resources */
        error = lpfc_setup_driver_resource_phase2(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1406 Failed to set up driver resource.\n");
                goto out_free_iocb_list;
        }

        /* Create SCSI host to the physical port */
        error = lpfc_create_shost(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1407 Failed to create scsi host.\n");
                goto out_unset_driver_resource;
        }

        /* Configure sysfs attributes */
        vport = phba->pport;
        error = lpfc_alloc_sysfs_attr(vport);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1476 Failed to allocate sysfs attr\n");
                goto out_destroy_shost;
        }

        shost = lpfc_shost_from_vport(vport); /* save shost for error cleanup */
        /* Now, trying to enable interrupt and bring up the device */
        cfg_mode = phba->cfg_use_msi;
        while (true) {
                /* Put device to a known state before enabling interrupt */
                lpfc_stop_port(phba);
                /* Configure and enable interrupt */
                intr_mode = lpfc_sli_enable_intr(phba, cfg_mode);
                if (intr_mode == LPFC_INTR_ERROR) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0431 Failed to enable interrupt.\n");
                        error = -ENODEV;
                        goto out_free_sysfs_attr;
                }
                /* SLI-3 HBA setup */
                if (lpfc_sli_hba_setup(phba)) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "1477 Failed to set up hba\n");
                        error = -ENODEV;
                        goto out_remove_device;
                }

                /* Wait 50ms for the interrupts of previous mailbox commands */
                msleep(50);
                /* Check active interrupts on message signaled interrupts */
                if (intr_mode == 0 ||
                    phba->sli.slistat.sli_intr > LPFC_MSIX_VECTORS) {
                        /* Log the current active interrupt mode */
                        phba->intr_mode = intr_mode;
                        lpfc_log_intr_mode(phba, intr_mode);
                        break;
                } else {
                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                        "0447 Configure interrupt mode (%d) "
                                        "failed active interrupt test.\n",
                                        intr_mode);
                        /* Disable the current interrupt mode */
                        lpfc_sli_disable_intr(phba);
                        /* Try next level of interrupt mode */
                        cfg_mode = --intr_mode;
                }
        }

        /* Perform post initialization setup */
        lpfc_post_init_setup(phba);

        /* Check if there are static vports to be created. */
        lpfc_create_static_vport(phba);

        return 0;

out_remove_device:
        lpfc_unset_hba(phba);
out_free_sysfs_attr:
        lpfc_free_sysfs_attr(vport);
out_destroy_shost:
        lpfc_destroy_shost(phba);
out_unset_driver_resource:
        lpfc_unset_driver_resource_phase2(phba);
out_free_iocb_list:
        lpfc_free_iocb_list(phba);
out_unset_driver_resource_s3:
        lpfc_sli_driver_resource_unset(phba);
out_unset_pci_mem_s3:
        lpfc_sli_pci_mem_unset(phba);
out_disable_pci_dev:
        lpfc_disable_pci_dev(phba);
        if (shost)
                scsi_host_put(shost);
out_free_phba:
        lpfc_hba_free(phba);
        return error;
}

/**
 * lpfc_pci_remove_one_s3 - PCI func to unreg SLI-3 device from PCI subsystem.
 * @pdev: pointer to PCI device
 *
 * This routine is to be called to disattach a device with SLI-3 interface
 * spec from PCI subsystem. When an Emulex HBA with SLI-3 interface spec is
 * removed from PCI bus, it performs all the necessary cleanup for the HBA
 * device to be removed from the PCI subsystem properly.
 **/
static void __devexit
lpfc_pci_remove_one_s3(struct pci_dev *pdev)
{
        struct Scsi_Host  *shost = pci_get_drvdata(pdev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_vport **vports;
        struct lpfc_hba   *phba = vport->phba;
        int i;
        int bars = pci_select_bars(pdev, IORESOURCE_MEM);

        spin_lock_irq(&phba->hbalock);
        vport->load_flag |= FC_UNLOADING;
        spin_unlock_irq(&phba->hbalock);

        lpfc_free_sysfs_attr(vport);

        /* Release all the vports against this physical port */
        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for (i = 1; i <= phba->max_vports && vports[i] != NULL; i++)
                        fc_vport_terminate(vports[i]->fc_vport);
        lpfc_destroy_vport_work_array(phba, vports);

        /* Remove FC host and then SCSI host with the physical port */
        fc_remove_host(shost);
        scsi_remove_host(shost);
        lpfc_cleanup(vport);

        /*
         * Bring down the SLI Layer. This step disable all interrupts,
         * clears the rings, discards all mailbox commands, and resets
         * the HBA.
         */

        /* HBA interrupt will be diabled after this call */
        lpfc_sli_hba_down(phba);
        /* Stop kthread signal shall trigger work_done one more time */
        kthread_stop(phba->worker_thread);
        /* Final cleanup of txcmplq and reset the HBA */
        lpfc_sli_brdrestart(phba);

        lpfc_stop_hba_timers(phba);
        spin_lock_irq(&phba->hbalock);
        list_del_init(&vport->listentry);
        spin_unlock_irq(&phba->hbalock);

        lpfc_debugfs_terminate(vport);

        /* Disable interrupt */
        lpfc_sli_disable_intr(phba);

        pci_set_drvdata(pdev, NULL);
        scsi_host_put(shost);

        /*
         * Call scsi_free before mem_free since scsi bufs are released to their
         * corresponding pools here.
         */
        lpfc_scsi_free(phba);
        lpfc_mem_free_all(phba);

        dma_free_coherent(&pdev->dev, lpfc_sli_hbq_size(),
                          phba->hbqslimp.virt, phba->hbqslimp.phys);

        /* Free resources associated with SLI2 interface */
        dma_free_coherent(&pdev->dev, SLI2_SLIM_SIZE,
                          phba->slim2p.virt, phba->slim2p.phys);

        /* unmap adapter SLIM and Control Registers */
        iounmap(phba->ctrl_regs_memmap_p);
        iounmap(phba->slim_memmap_p);

        lpfc_hba_free(phba);

        pci_release_selected_regions(pdev, bars);
        pci_disable_device(pdev);
}

/**
 * lpfc_pci_suspend_one_s3 - PCI func to suspend SLI-3 device for power mgmnt
 * @pdev: pointer to PCI device
 * @msg: power management message
 *
 * This routine is to be called from the kernel's PCI subsystem to support
 * system Power Management (PM) to device with SLI-3 interface spec. When
 * PM invokes this method, it quiesces the device by stopping the driver's
 * worker thread for the device, turning off device's interrupt and DMA,
 * and bring the device offline. Note that as the driver implements the
 * minimum PM requirements to a power-aware driver's PM support for the
 * suspend/resume -- all the possible PM messages (SUSPEND, HIBERNATE, FREEZE)
 * to the suspend() method call will be treated as SUSPEND and the driver will
 * fully reinitialize its device during resume() method call, the driver will
 * set device to PCI_D3hot state in PCI config space instead of setting it
 * according to the @msg provided by the PM.
 *
 * Return code
 *      0 - driver suspended the device
 *      Error otherwise
 **/
static int
lpfc_pci_suspend_one_s3(struct pci_dev *pdev, pm_message_t msg)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0473 PCI device Power Management suspend.\n");

        /* Bring down the device */
        lpfc_offline_prep(phba);
        lpfc_offline(phba);
        kthread_stop(phba->worker_thread);

        /* Disable interrupt from device */
        lpfc_sli_disable_intr(phba);

        /* Save device state to PCI config space */
        pci_save_state(pdev);
        pci_set_power_state(pdev, PCI_D3hot);

        return 0;
}

/**
 * lpfc_pci_resume_one_s3 - PCI func to resume SLI-3 device for power mgmnt
 * @pdev: pointer to PCI device
 *
 * This routine is to be called from the kernel's PCI subsystem to support
 * system Power Management (PM) to device with SLI-3 interface spec. When PM
 * invokes this method, it restores the device's PCI config space state and
 * fully reinitializes the device and brings it online. Note that as the
 * driver implements the minimum PM requirements to a power-aware driver's
 * PM for suspend/resume -- all the possible PM messages (SUSPEND, HIBERNATE,
 * FREEZE) to the suspend() method call will be treated as SUSPEND and the
 * driver will fully reinitialize its device during resume() method call,
 * the device will be set to PCI_D0 directly in PCI config space before
 * restoring the state.
 *
 * Return code
 *      0 - driver suspended the device
 *      Error otherwise
 **/
static int
lpfc_pci_resume_one_s3(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        uint32_t intr_mode;
        int error;

        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0452 PCI device Power Management resume.\n");

        /* Restore device state from PCI config space */
        pci_set_power_state(pdev, PCI_D0);
        pci_restore_state(pdev);

        /*
         * As the new kernel behavior of pci_restore_state() API call clears
         * device saved_state flag, need to save the restored state again.
         */
        pci_save_state(pdev);

        if (pdev->is_busmaster)
                pci_set_master(pdev);

        /* Startup the kernel thread for this host adapter. */
        phba->worker_thread = kthread_run(lpfc_do_work, phba,
                                        "lpfc_worker_%d", phba->brd_no);
        if (IS_ERR(phba->worker_thread)) {
                error = PTR_ERR(phba->worker_thread);
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0434 PM resume failed to start worker "
                                "thread: error=x%x.\n", error);
                return error;
        }

        /* Configure and enable interrupt */
        intr_mode = lpfc_sli_enable_intr(phba, phba->intr_mode);
        if (intr_mode == LPFC_INTR_ERROR) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0430 PM resume Failed to enable interrupt\n");
                return -EIO;
        } else
                phba->intr_mode = intr_mode;

        /* Restart HBA and bring it online */
        lpfc_sli_brdrestart(phba);
        lpfc_online(phba);

        /* Log the current active interrupt mode */
        lpfc_log_intr_mode(phba, phba->intr_mode);

        return 0;
}

/**
 * lpfc_sli_prep_dev_for_recover - Prepare SLI3 device for pci slot recover
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is called to prepare the SLI3 device for PCI slot recover. It
 * aborts and stops all the on-going I/Os on the pci device.
 **/
static void
lpfc_sli_prep_dev_for_recover(struct lpfc_hba *phba)
{
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2723 PCI channel I/O abort preparing for recovery\n");
        /* Prepare for bringing HBA offline */
        lpfc_offline_prep(phba);
        /* Clear sli active flag to prevent sysfs access to HBA */
        spin_lock_irq(&phba->hbalock);
        phba->sli.sli_flag &= ~LPFC_SLI_ACTIVE;
        spin_unlock_irq(&phba->hbalock);
        /* Stop and flush all I/Os and bring HBA offline */
        lpfc_offline(phba);
}

/**
 * lpfc_sli_prep_dev_for_reset - Prepare SLI3 device for pci slot reset
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is called to prepare the SLI3 device for PCI slot reset. It
 * disables the device interrupt and pci device, and aborts the internal FCP
 * pending I/Os.
 **/
static void
lpfc_sli_prep_dev_for_reset(struct lpfc_hba *phba)
{
        struct lpfc_sli *psli = &phba->sli;
        struct lpfc_sli_ring  *pring;

        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2710 PCI channel disable preparing for reset\n");
        /* Disable interrupt and pci device */
        lpfc_sli_disable_intr(phba);
        pci_disable_device(phba->pcidev);
        /*
         * There may be I/Os dropped by the firmware.
         * Error iocb (I/O) on txcmplq and let the SCSI layer
         * retry it after re-establishing link.
         */
        pring = &psli->ring[psli->fcp_ring];
        lpfc_sli_abort_iocb_ring(phba, pring);
}

/**
 * lpfc_sli_prep_dev_for_perm_failure - Prepare SLI3 dev for pci slot disable
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is called to prepare the SLI3 device for PCI slot permanently
 * disabling. It blocks the SCSI transport layer traffic and flushes the FCP
 * pending I/Os.
 **/
static void
lpfc_prep_dev_for_perm_failure(struct lpfc_hba *phba)
{
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "2711 PCI channel permanent disable for failure\n");
        /* Clean up all driver's outstanding SCSI I/Os */
        lpfc_sli_flush_fcp_rings(phba);
}

/**
 * lpfc_io_error_detected_s3 - Method for handling SLI-3 device PCI I/O error
 * @pdev: pointer to PCI device.
 * @state: the current PCI connection state.
 *
 * This routine is called from the PCI subsystem for I/O error handling to
 * device with SLI-3 interface spec. This function is called by the PCI
 * subsystem after a PCI bus error affecting this device has been detected.
 * When this function is invoked, it will need to stop all the I/Os and
 * interrupt(s) to the device. Once that is done, it will return
 * PCI_ERS_RESULT_NEED_RESET for the PCI subsystem to perform proper recovery
 * as desired.
 *
 * Return codes
 *      PCI_ERS_RESULT_CAN_RECOVER - can be recovered with reset_link
 *      PCI_ERS_RESULT_NEED_RESET - need to reset before recovery
 *      PCI_ERS_RESULT_DISCONNECT - device could not be recovered
 **/
static pci_ers_result_t
lpfc_io_error_detected_s3(struct pci_dev *pdev, pci_channel_state_t state)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        /* Block all SCSI devices' I/Os on the host */
        lpfc_scsi_dev_block(phba);

        switch (state) {
        case pci_channel_io_normal:
                /* Non-fatal error, prepare for recovery */
                lpfc_sli_prep_dev_for_recover(phba);
                return PCI_ERS_RESULT_CAN_RECOVER;
        case pci_channel_io_frozen:
                /* Fatal error, prepare for slot reset */
                lpfc_sli_prep_dev_for_reset(phba);
                return PCI_ERS_RESULT_NEED_RESET;
        case pci_channel_io_perm_failure:
                /* Permanent failure, prepare for device down */
                lpfc_prep_dev_for_perm_failure(phba);
                return PCI_ERS_RESULT_DISCONNECT;
        default:
                /* Unknown state, prepare and request slot reset */
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0472 Unknown PCI error state: x%x\n", state);
                lpfc_sli_prep_dev_for_reset(phba);
                return PCI_ERS_RESULT_NEED_RESET;
        }
}

/**
 * lpfc_io_slot_reset_s3 - Method for restarting PCI SLI-3 device from scratch.
 * @pdev: pointer to PCI device.
 *
 * This routine is called from the PCI subsystem for error handling to
 * device with SLI-3 interface spec. This is called after PCI bus has been
 * reset to restart the PCI card from scratch, as if from a cold-boot.
 * During the PCI subsystem error recovery, after driver returns
 * PCI_ERS_RESULT_NEED_RESET, the PCI subsystem will perform proper error
 * recovery and then call this routine before calling the .resume method
 * to recover the device. This function will initialize the HBA device,
 * enable the interrupt, but it will just put the HBA to offline state
 * without passing any I/O traffic.
 *
 * Return codes
 *      PCI_ERS_RESULT_RECOVERED - the device has been recovered
 *      PCI_ERS_RESULT_DISCONNECT - device could not be recovered
 */
static pci_ers_result_t
lpfc_io_slot_reset_s3(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        struct lpfc_sli *psli = &phba->sli;
        uint32_t intr_mode;

        dev_printk(KERN_INFO, &pdev->dev, "recovering from a slot reset.\n");
        if (pci_enable_device_mem(pdev)) {
                printk(KERN_ERR "lpfc: Cannot re-enable "
                        "PCI device after reset.\n");
                return PCI_ERS_RESULT_DISCONNECT;
        }

        pci_restore_state(pdev);

        /*
         * As the new kernel behavior of pci_restore_state() API call clears
         * device saved_state flag, need to save the restored state again.
         */
        pci_save_state(pdev);

        if (pdev->is_busmaster)
                pci_set_master(pdev);

        spin_lock_irq(&phba->hbalock);
        psli->sli_flag &= ~LPFC_SLI_ACTIVE;
        spin_unlock_irq(&phba->hbalock);

        /* Configure and enable interrupt */
        intr_mode = lpfc_sli_enable_intr(phba, phba->intr_mode);
        if (intr_mode == LPFC_INTR_ERROR) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0427 Cannot re-enable interrupt after "
                                "slot reset.\n");
                return PCI_ERS_RESULT_DISCONNECT;
        } else
                phba->intr_mode = intr_mode;

        /* Take device offline; this will perform cleanup */
        lpfc_offline(phba);
        lpfc_sli_brdrestart(phba);

        /* Log the current active interrupt mode */
        lpfc_log_intr_mode(phba, phba->intr_mode);

        return PCI_ERS_RESULT_RECOVERED;
}

/**
 * lpfc_io_resume_s3 - Method for resuming PCI I/O operation on SLI-3 device.
 * @pdev: pointer to PCI device
 *
 * This routine is called from the PCI subsystem for error handling to device
 * with SLI-3 interface spec. It is called when kernel error recovery tells
 * the lpfc driver that it is ok to resume normal PCI operation after PCI bus
 * error recovery. After this call, traffic can start to flow from this device
 * again.
 */
static void
lpfc_io_resume_s3(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        /* Bring the device online */
        lpfc_online(phba);

        /* Clean up Advanced Error Reporting (AER) if needed */
        if (phba->hba_flag & HBA_AER_ENABLED)
                pci_cleanup_aer_uncorrect_error_status(pdev);
}

/**
 * lpfc_sli4_get_els_iocb_cnt - Calculate the # of ELS IOCBs to reserve
 * @phba: pointer to lpfc hba data structure.
 *
 * returns the number of ELS/CT IOCBs to reserve
 **/
int
lpfc_sli4_get_els_iocb_cnt(struct lpfc_hba *phba)
{
        int max_xri = phba->sli4_hba.max_cfg_param.max_xri;

        if (phba->sli_rev == LPFC_SLI_REV4) {
                if (max_xri <= 100)
                        return 10;
                else if (max_xri <= 256)
                        return 25;
                else if (max_xri <= 512)
                        return 50;
                else if (max_xri <= 1024)
                        return 100;
                else
                        return 150;
        } else
                return 0;
}

/**
 * lpfc_pci_probe_one_s4 - PCI probe func to reg SLI-4 device to PCI subsys
 * @pdev: pointer to PCI device
 * @pid: pointer to PCI device identifier
 *
 * This routine is called from the kernel's PCI subsystem to device with
 * SLI-4 interface spec. When an Emulex HBA with SLI-4 interface spec is
 * presented on PCI bus, the kernel PCI subsystem looks at PCI device-specific
 * information of the device and driver to see if the driver state that it
 * can support this kind of device. If the match is successful, the driver
 * core invokes this routine. If this routine determines it can claim the HBA,
 * it does all the initialization that it needs to do to handle the HBA
 * properly.
 *
 * Return code
 *      0 - driver can claim the device
 *      negative value - driver can not claim the device
 **/
static int __devinit
lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
{
        struct lpfc_hba   *phba;
        struct lpfc_vport *vport = NULL;
        struct Scsi_Host  *shost = NULL;
        int error;
        uint32_t cfg_mode, intr_mode;
        int mcnt;

        /* Allocate memory for HBA structure */
        phba = lpfc_hba_alloc(pdev);
        if (!phba)
                return -ENOMEM;

        /* Perform generic PCI device enabling operation */
        error = lpfc_enable_pci_dev(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1409 Failed to enable pci device.\n");
                goto out_free_phba;
        }

        /* Set up SLI API function jump table for PCI-device group-1 HBAs */
        error = lpfc_api_table_setup(phba, LPFC_PCI_DEV_OC);
        if (error)
                goto out_disable_pci_dev;

        /* Set up SLI-4 specific device PCI memory space */
        error = lpfc_sli4_pci_mem_setup(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1410 Failed to set up pci memory space.\n");
                goto out_disable_pci_dev;
        }

        /* Set up phase-1 common device driver resources */
        error = lpfc_setup_driver_resource_phase1(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1411 Failed to set up driver resource.\n");
                goto out_unset_pci_mem_s4;
        }

        /* Set up SLI-4 Specific device driver resources */
        error = lpfc_sli4_driver_resource_setup(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1412 Failed to set up driver resource.\n");
                goto out_unset_pci_mem_s4;
        }

        /* Initialize and populate the iocb list per host */
        error = lpfc_init_iocb_list(phba,
                        phba->sli4_hba.max_cfg_param.max_xri);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1413 Failed to initialize iocb list.\n");
                goto out_unset_driver_resource_s4;
        }

        /* Set up common device driver resources */
        error = lpfc_setup_driver_resource_phase2(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1414 Failed to set up driver resource.\n");
                goto out_free_iocb_list;
        }

        /* Create SCSI host to the physical port */
        error = lpfc_create_shost(phba);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1415 Failed to create scsi host.\n");
                goto out_unset_driver_resource;
        }

        /* Configure sysfs attributes */
        vport = phba->pport;
        error = lpfc_alloc_sysfs_attr(vport);
        if (error) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1416 Failed to allocate sysfs attr\n");
                goto out_destroy_shost;
        }

        shost = lpfc_shost_from_vport(vport); /* save shost for error cleanup */
        /* Now, trying to enable interrupt and bring up the device */
        cfg_mode = phba->cfg_use_msi;
        while (true) {
                /* Put device to a known state before enabling interrupt */
                lpfc_stop_port(phba);
                /* Configure and enable interrupt */
                intr_mode = lpfc_sli4_enable_intr(phba, cfg_mode);
                if (intr_mode == LPFC_INTR_ERROR) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "0426 Failed to enable interrupt.\n");
                        error = -ENODEV;
                        goto out_free_sysfs_attr;
                }
                /* Default to single FCP EQ for non-MSI-X */
                if (phba->intr_type != MSIX)
                        phba->cfg_fcp_eq_count = 1;
                /* Set up SLI-4 HBA */
                if (lpfc_sli4_hba_setup(phba)) {
                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                        "1421 Failed to set up hba\n");
                        error = -ENODEV;
                        goto out_disable_intr;
                }

                /* Send NOP mbx cmds for non-INTx mode active interrupt test */
                if (intr_mode != 0)
                        mcnt = lpfc_sli4_send_nop_mbox_cmds(phba,
                                                            LPFC_ACT_INTR_CNT);

                /* Check active interrupts received only for MSI/MSI-X */
                if (intr_mode == 0 ||
                    phba->sli.slistat.sli_intr >= LPFC_ACT_INTR_CNT) {
                        /* Log the current active interrupt mode */
                        phba->intr_mode = intr_mode;
                        lpfc_log_intr_mode(phba, intr_mode);
                        break;
                }
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0451 Configure interrupt mode (%d) "
                                "failed active interrupt test.\n",
                                intr_mode);
                /* Unset the preivous SLI-4 HBA setup */
                lpfc_sli4_unset_hba(phba);
                /* Try next level of interrupt mode */
                cfg_mode = --intr_mode;
        }

        /* Perform post initialization setup */
        lpfc_post_init_setup(phba);

        /* Check if there are static vports to be created. */
        lpfc_create_static_vport(phba);

        return 0;

out_disable_intr:
        lpfc_sli4_disable_intr(phba);
out_free_sysfs_attr:
        lpfc_free_sysfs_attr(vport);
out_destroy_shost:
        lpfc_destroy_shost(phba);
out_unset_driver_resource:
        lpfc_unset_driver_resource_phase2(phba);
out_free_iocb_list:
        lpfc_free_iocb_list(phba);
out_unset_driver_resource_s4:
        lpfc_sli4_driver_resource_unset(phba);
out_unset_pci_mem_s4:
        lpfc_sli4_pci_mem_unset(phba);
out_disable_pci_dev:
        lpfc_disable_pci_dev(phba);
        if (shost)
                scsi_host_put(shost);
out_free_phba:
        lpfc_hba_free(phba);
        return error;
}

/**
 * lpfc_pci_remove_one_s4 - PCI func to unreg SLI-4 device from PCI subsystem
 * @pdev: pointer to PCI device
 *
 * This routine is called from the kernel's PCI subsystem to device with
 * SLI-4 interface spec. When an Emulex HBA with SLI-4 interface spec is
 * removed from PCI bus, it performs all the necessary cleanup for the HBA
 * device to be removed from the PCI subsystem properly.
 **/
static void __devexit
lpfc_pci_remove_one_s4(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_vport **vports;
        struct lpfc_hba *phba = vport->phba;
        int i;

        /* Mark the device unloading flag */
        spin_lock_irq(&phba->hbalock);
        vport->load_flag |= FC_UNLOADING;
        spin_unlock_irq(&phba->hbalock);

        /* Free the HBA sysfs attributes */
        lpfc_free_sysfs_attr(vport);

        /* Release all the vports against this physical port */
        vports = lpfc_create_vport_work_array(phba);
        if (vports != NULL)
                for (i = 1; i <= phba->max_vports && vports[i] != NULL; i++)
                        fc_vport_terminate(vports[i]->fc_vport);
        lpfc_destroy_vport_work_array(phba, vports);

        /* Remove FC host and then SCSI host with the physical port */
        fc_remove_host(shost);
        scsi_remove_host(shost);

        /* Perform cleanup on the physical port */
        lpfc_cleanup(vport);

        /*
         * Bring down the SLI Layer. This step disables all interrupts,
         * clears the rings, discards all mailbox commands, and resets
         * the HBA FCoE function.
         */
        lpfc_debugfs_terminate(vport);
        lpfc_sli4_hba_unset(phba);

        spin_lock_irq(&phba->hbalock);
        list_del_init(&vport->listentry);
        spin_unlock_irq(&phba->hbalock);

        /* Call scsi_free before lpfc_sli4_driver_resource_unset since scsi
         * buffers are released to their corresponding pools here.
         */
        lpfc_scsi_free(phba);
        lpfc_sli4_driver_resource_unset(phba);

        /* Unmap adapter Control and Doorbell registers */
        lpfc_sli4_pci_mem_unset(phba);

        /* Release PCI resources and disable device's PCI function */
        scsi_host_put(shost);
        lpfc_disable_pci_dev(phba);

        /* Finally, free the driver's device data structure */
        lpfc_hba_free(phba);

        return;
}

/**
 * lpfc_pci_suspend_one_s4 - PCI func to suspend SLI-4 device for power mgmnt
 * @pdev: pointer to PCI device
 * @msg: power management message
 *
 * This routine is called from the kernel's PCI subsystem to support system
 * Power Management (PM) to device with SLI-4 interface spec. When PM invokes
 * this method, it quiesces the device by stopping the driver's worker
 * thread for the device, turning off device's interrupt and DMA, and bring
 * the device offline. Note that as the driver implements the minimum PM
 * requirements to a power-aware driver's PM support for suspend/resume -- all
 * the possible PM messages (SUSPEND, HIBERNATE, FREEZE) to the suspend()
 * method call will be treated as SUSPEND and the driver will fully
 * reinitialize its device during resume() method call, the driver will set
 * device to PCI_D3hot state in PCI config space instead of setting it
 * according to the @msg provided by the PM.
 *
 * Return code
 *      0 - driver suspended the device
 *      Error otherwise
 **/
static int
lpfc_pci_suspend_one_s4(struct pci_dev *pdev, pm_message_t msg)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0298 PCI device Power Management suspend.\n");

        /* Bring down the device */
        lpfc_offline_prep(phba);
        lpfc_offline(phba);
        kthread_stop(phba->worker_thread);

        /* Disable interrupt from device */
        lpfc_sli4_disable_intr(phba);

        /* Save device state to PCI config space */
        pci_save_state(pdev);
        pci_set_power_state(pdev, PCI_D3hot);

        return 0;
}

/**
 * lpfc_pci_resume_one_s4 - PCI func to resume SLI-4 device for power mgmnt
 * @pdev: pointer to PCI device
 *
 * This routine is called from the kernel's PCI subsystem to support system
 * Power Management (PM) to device with SLI-4 interface spac. When PM invokes
 * this method, it restores the device's PCI config space state and fully
 * reinitializes the device and brings it online. Note that as the driver
 * implements the minimum PM requirements to a power-aware driver's PM for
 * suspend/resume -- all the possible PM messages (SUSPEND, HIBERNATE, FREEZE)
 * to the suspend() method call will be treated as SUSPEND and the driver
 * will fully reinitialize its device during resume() method call, the device
 * will be set to PCI_D0 directly in PCI config space before restoring the
 * state.
 *
 * Return code
 *      0 - driver suspended the device
 *      Error otherwise
 **/
static int
lpfc_pci_resume_one_s4(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        uint32_t intr_mode;
        int error;

        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "0292 PCI device Power Management resume.\n");

        /* Restore device state from PCI config space */
        pci_set_power_state(pdev, PCI_D0);
        pci_restore_state(pdev);

        /*
         * As the new kernel behavior of pci_restore_state() API call clears
         * device saved_state flag, need to save the restored state again.
         */
        pci_save_state(pdev);

        if (pdev->is_busmaster)
                pci_set_master(pdev);

         /* Startup the kernel thread for this host adapter. */
        phba->worker_thread = kthread_run(lpfc_do_work, phba,
                                        "lpfc_worker_%d", phba->brd_no);
        if (IS_ERR(phba->worker_thread)) {
                error = PTR_ERR(phba->worker_thread);
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0293 PM resume failed to start worker "
                                "thread: error=x%x.\n", error);
                return error;
        }

        /* Configure and enable interrupt */
        intr_mode = lpfc_sli4_enable_intr(phba, phba->intr_mode);
        if (intr_mode == LPFC_INTR_ERROR) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0294 PM resume Failed to enable interrupt\n");
                return -EIO;
        } else
                phba->intr_mode = intr_mode;

        /* Restart HBA and bring it online */
        lpfc_sli_brdrestart(phba);
        lpfc_online(phba);

        /* Log the current active interrupt mode */
        lpfc_log_intr_mode(phba, phba->intr_mode);

        return 0;
}

/**
 * lpfc_io_error_detected_s4 - Method for handling PCI I/O error to SLI-4 device
 * @pdev: pointer to PCI device.
 * @state: the current PCI connection state.
 *
 * This routine is called from the PCI subsystem for error handling to device
 * with SLI-4 interface spec. This function is called by the PCI subsystem
 * after a PCI bus error affecting this device has been detected. When this
 * function is invoked, it will need to stop all the I/Os and interrupt(s)
 * to the device. Once that is done, it will return PCI_ERS_RESULT_NEED_RESET
 * for the PCI subsystem to perform proper recovery as desired.
 *
 * Return codes
 *      PCI_ERS_RESULT_NEED_RESET - need to reset before recovery
 *      PCI_ERS_RESULT_DISCONNECT - device could not be recovered
 **/
static pci_ers_result_t
lpfc_io_error_detected_s4(struct pci_dev *pdev, pci_channel_state_t state)
{
        return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * lpfc_io_slot_reset_s4 - Method for restart PCI SLI-4 device from scratch
 * @pdev: pointer to PCI device.
 *
 * This routine is called from the PCI subsystem for error handling to device
 * with SLI-4 interface spec. It is called after PCI bus has been reset to
 * restart the PCI card from scratch, as if from a cold-boot. During the
 * PCI subsystem error recovery, after the driver returns
 * PCI_ERS_RESULT_NEED_RESET, the PCI subsystem will perform proper error
 * recovery and then call this routine before calling the .resume method to
 * recover the device. This function will initialize the HBA device, enable
 * the interrupt, but it will just put the HBA to offline state without
 * passing any I/O traffic.
 *
 * Return codes
 *      PCI_ERS_RESULT_RECOVERED - the device has been recovered
 *      PCI_ERS_RESULT_DISCONNECT - device could not be recovered
 */
static pci_ers_result_t
lpfc_io_slot_reset_s4(struct pci_dev *pdev)
{
        return PCI_ERS_RESULT_RECOVERED;
}

/**
 * lpfc_io_resume_s4 - Method for resuming PCI I/O operation to SLI-4 device
 * @pdev: pointer to PCI device
 *
 * This routine is called from the PCI subsystem for error handling to device
 * with SLI-4 interface spec. It is called when kernel error recovery tells
 * the lpfc driver that it is ok to resume normal PCI operation after PCI bus
 * error recovery. After this call, traffic can start to flow from this device
 * again.
 **/
static void
lpfc_io_resume_s4(struct pci_dev *pdev)
{
        return;
}

/**
 * lpfc_pci_probe_one - lpfc PCI probe func to reg dev to PCI subsystem
 * @pdev: pointer to PCI device
 * @pid: pointer to PCI device identifier
 *
 * This routine is to be registered to the kernel's PCI subsystem. When an
 * Emulex HBA device is presented on PCI bus, the kernel PCI subsystem looks
 * at PCI device-specific information of the device and driver to see if the
 * driver state that it can support this kind of device. If the match is
 * successful, the driver core invokes this routine. This routine dispatches
 * the action to the proper SLI-3 or SLI-4 device probing routine, which will
 * do all the initialization that it needs to do to handle the HBA device
 * properly.
 *
 * Return code
 *      0 - driver can claim the device
 *      negative value - driver can not claim the device
 **/
static int __devinit
lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid)
{
        int rc;
        struct lpfc_sli_intf intf;

        if (pci_read_config_dword(pdev, LPFC_SLI_INTF, &intf.word0))
                return -ENODEV;

        if ((bf_get(lpfc_sli_intf_valid, &intf) == LPFC_SLI_INTF_VALID) &&
            (bf_get(lpfc_sli_intf_slirev, &intf) == LPFC_SLI_INTF_REV_SLI4))
                rc = lpfc_pci_probe_one_s4(pdev, pid);
        else
                rc = lpfc_pci_probe_one_s3(pdev, pid);

        return rc;
}

/**
 * lpfc_pci_remove_one - lpfc PCI func to unreg dev from PCI subsystem
 * @pdev: pointer to PCI device
 *
 * This routine is to be registered to the kernel's PCI subsystem. When an
 * Emulex HBA is removed from PCI bus, the driver core invokes this routine.
 * This routine dispatches the action to the proper SLI-3 or SLI-4 device
 * remove routine, which will perform all the necessary cleanup for the
 * device to be removed from the PCI subsystem properly.
 **/
static void __devexit
lpfc_pci_remove_one(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        switch (phba->pci_dev_grp) {
        case LPFC_PCI_DEV_LP:
                lpfc_pci_remove_one_s3(pdev);
                break;
        case LPFC_PCI_DEV_OC:
                lpfc_pci_remove_one_s4(pdev);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1424 Invalid PCI device group: 0x%x\n",
                                phba->pci_dev_grp);
                break;
        }
        return;
}

/**
 * lpfc_pci_suspend_one - lpfc PCI func to suspend dev for power management
 * @pdev: pointer to PCI device
 * @msg: power management message
 *
 * This routine is to be registered to the kernel's PCI subsystem to support
 * system Power Management (PM). When PM invokes this method, it dispatches
 * the action to the proper SLI-3 or SLI-4 device suspend routine, which will
 * suspend the device.
 *
 * Return code
 *      0 - driver suspended the device
 *      Error otherwise
 **/
static int
lpfc_pci_suspend_one(struct pci_dev *pdev, pm_message_t msg)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        int rc = -ENODEV;

        switch (phba->pci_dev_grp) {
        case LPFC_PCI_DEV_LP:
                rc = lpfc_pci_suspend_one_s3(pdev, msg);
                break;
        case LPFC_PCI_DEV_OC:
                rc = lpfc_pci_suspend_one_s4(pdev, msg);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1425 Invalid PCI device group: 0x%x\n",
                                phba->pci_dev_grp);
                break;
        }
        return rc;
}

/**
 * lpfc_pci_resume_one - lpfc PCI func to resume dev for power management
 * @pdev: pointer to PCI device
 *
 * This routine is to be registered to the kernel's PCI subsystem to support
 * system Power Management (PM). When PM invokes this method, it dispatches
 * the action to the proper SLI-3 or SLI-4 device resume routine, which will
 * resume the device.
 *
 * Return code
 *      0 - driver suspended the device
 *      Error otherwise
 **/
static int
lpfc_pci_resume_one(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        int rc = -ENODEV;

        switch (phba->pci_dev_grp) {
        case LPFC_PCI_DEV_LP:
                rc = lpfc_pci_resume_one_s3(pdev);
                break;
        case LPFC_PCI_DEV_OC:
                rc = lpfc_pci_resume_one_s4(pdev);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1426 Invalid PCI device group: 0x%x\n",
                                phba->pci_dev_grp);
                break;
        }
        return rc;
}

/**
 * lpfc_io_error_detected - lpfc method for handling PCI I/O error
 * @pdev: pointer to PCI device.
 * @state: the current PCI connection state.
 *
 * This routine is registered to the PCI subsystem for error handling. This
 * function is called by the PCI subsystem after a PCI bus error affecting
 * this device has been detected. When this routine is invoked, it dispatches
 * the action to the proper SLI-3 or SLI-4 device error detected handling
 * routine, which will perform the proper error detected operation.
 *
 * Return codes
 *      PCI_ERS_RESULT_NEED_RESET - need to reset before recovery
 *      PCI_ERS_RESULT_DISCONNECT - device could not be recovered
 **/
static pci_ers_result_t
lpfc_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        pci_ers_result_t rc = PCI_ERS_RESULT_DISCONNECT;

        switch (phba->pci_dev_grp) {
        case LPFC_PCI_DEV_LP:
                rc = lpfc_io_error_detected_s3(pdev, state);
                break;
        case LPFC_PCI_DEV_OC:
                rc = lpfc_io_error_detected_s4(pdev, state);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1427 Invalid PCI device group: 0x%x\n",
                                phba->pci_dev_grp);
                break;
        }
        return rc;
}

/**
 * lpfc_io_slot_reset - lpfc method for restart PCI dev from scratch
 * @pdev: pointer to PCI device.
 *
 * This routine is registered to the PCI subsystem for error handling. This
 * function is called after PCI bus has been reset to restart the PCI card
 * from scratch, as if from a cold-boot. When this routine is invoked, it
 * dispatches the action to the proper SLI-3 or SLI-4 device reset handling
 * routine, which will perform the proper device reset.
 *
 * Return codes
 *      PCI_ERS_RESULT_RECOVERED - the device has been recovered
 *      PCI_ERS_RESULT_DISCONNECT - device could not be recovered
 **/
static pci_ers_result_t
lpfc_io_slot_reset(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        pci_ers_result_t rc = PCI_ERS_RESULT_DISCONNECT;

        switch (phba->pci_dev_grp) {
        case LPFC_PCI_DEV_LP:
                rc = lpfc_io_slot_reset_s3(pdev);
                break;
        case LPFC_PCI_DEV_OC:
                rc = lpfc_io_slot_reset_s4(pdev);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1428 Invalid PCI device group: 0x%x\n",
                                phba->pci_dev_grp);
                break;
        }
        return rc;
}

/**
 * lpfc_io_resume - lpfc method for resuming PCI I/O operation
 * @pdev: pointer to PCI device
 *
 * This routine is registered to the PCI subsystem for error handling. It
 * is called when kernel error recovery tells the lpfc driver that it is
 * OK to resume normal PCI operation after PCI bus error recovery. When
 * this routine is invoked, it dispatches the action to the proper SLI-3
 * or SLI-4 device io_resume routine, which will resume the device operation.
 **/
static void
lpfc_io_resume(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        switch (phba->pci_dev_grp) {
        case LPFC_PCI_DEV_LP:
                lpfc_io_resume_s3(pdev);
                break;
        case LPFC_PCI_DEV_OC:
                lpfc_io_resume_s4(pdev);
                break;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "1429 Invalid PCI device group: 0x%x\n",
                                phba->pci_dev_grp);
                break;
        }
        return;
}

static struct pci_device_id lpfc_id_table[] = {
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_VIPER,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_FIREFLY,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_THOR,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_PEGASUS,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_CENTAUR,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_DRAGONFLY,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SUPERFLY,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_RFLY,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_PFLY,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_NEPTUNE,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_NEPTUNE_SCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_NEPTUNE_DCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_HELIOS,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_HELIOS_SCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_HELIOS_DCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_BMID,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_BSMB,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZEPHYR,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_HORNET,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZEPHYR_SCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZEPHYR_DCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZMID,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZSMB,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_TFLY,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LP101,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LP10000S,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LP11000S,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LPE11000S,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT_MID,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT_SMB,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT_DCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT_SCSP,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT_S,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_PROTEUS_VF,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_PROTEUS_PF,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_PROTEUS_S,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_SERVERENGINE, PCI_DEVICE_ID_TIGERSHARK,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_SERVERENGINE, PCI_DEVICE_ID_TOMCAT,
                PCI_ANY_ID, PCI_ANY_ID, },
        {PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_FALCON,
                PCI_ANY_ID, PCI_ANY_ID, },
        { 0 }
};

MODULE_DEVICE_TABLE(pci, lpfc_id_table);

static struct pci_error_handlers lpfc_err_handler = {
        .error_detected = lpfc_io_error_detected,
        .slot_reset = lpfc_io_slot_reset,
        .resume = lpfc_io_resume,
};

static struct pci_driver lpfc_driver = {
        .name           = LPFC_DRIVER_NAME,
        .id_table       = lpfc_id_table,
        .probe          = lpfc_pci_probe_one,
        .remove         = __devexit_p(lpfc_pci_remove_one),
        .suspend        = lpfc_pci_suspend_one,
        .resume         = lpfc_pci_resume_one,
        .err_handler    = &lpfc_err_handler,
};

/**
 * lpfc_init - lpfc module initialization routine
 *
 * This routine is to be invoked when the lpfc module is loaded into the
 * kernel. The special kernel macro module_init() is used to indicate the
 * role of this routine to the kernel as lpfc module entry point.
 *
 * Return codes
 *   0 - successful
 *   -ENOMEM - FC attach transport failed
 *   all others - failed
 */
static int __init
lpfc_init(void)
{
        int error = 0;

        printk(LPFC_MODULE_DESC "\n");
        printk(LPFC_COPYRIGHT "\n");

        if (lpfc_enable_npiv) {
                lpfc_transport_functions.vport_create = lpfc_vport_create;
                lpfc_transport_functions.vport_delete = lpfc_vport_delete;
        }
        lpfc_transport_template =
                                fc_attach_transport(&lpfc_transport_functions);
        if (lpfc_transport_template == NULL)
                return -ENOMEM;
        if (lpfc_enable_npiv) {
                lpfc_vport_transport_template =
                        fc_attach_transport(&lpfc_vport_transport_functions);
                if (lpfc_vport_transport_template == NULL) {
                        fc_release_transport(lpfc_transport_template);
                        return -ENOMEM;
                }
        }
        error = pci_register_driver(&lpfc_driver);
        if (error) {
                fc_release_transport(lpfc_transport_template);
                if (lpfc_enable_npiv)
                        fc_release_transport(lpfc_vport_transport_template);
        }

        return error;
}

/**
 * lpfc_exit - lpfc module removal routine
 *
 * This routine is invoked when the lpfc module is removed from the kernel.
 * The special kernel macro module_exit() is used to indicate the role of
 * this routine to the kernel as lpfc module exit point.
 */
static void __exit
lpfc_exit(void)
{
        pci_unregister_driver(&lpfc_driver);
        fc_release_transport(lpfc_transport_template);
        if (lpfc_enable_npiv)
                fc_release_transport(lpfc_vport_transport_template);
        if (_dump_buf_data) {
                printk(KERN_ERR "9062 BLKGRD: freeing %lu pages for "
                                "_dump_buf_data at 0x%p\n",
                                (1L << _dump_buf_data_order), _dump_buf_data);
                free_pages((unsigned long)_dump_buf_data, _dump_buf_data_order);
        }

        if (_dump_buf_dif) {
                printk(KERN_ERR "9049 BLKGRD: freeing %lu pages for "
                                "_dump_buf_dif at 0x%p\n",
                                (1L << _dump_buf_dif_order), _dump_buf_dif);
                free_pages((unsigned long)_dump_buf_dif, _dump_buf_dif_order);
        }
}

module_init(lpfc_init);
module_exit(lpfc_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(LPFC_MODULE_DESC);
MODULE_AUTHOR("Emulex Corporation - tech.support@emulex.com");
MODULE_VERSION("0:" LPFC_DRIVER_VERSION);