/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.  *
 * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.broadcom.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/ctype.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/aer.h>
#include <linux/gfp.h>
#include <linux/kernel.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/fc/fc_fs.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.h"
#include "lpfc_scsi.h"
#include "lpfc_nvme.h"
#include "lpfc_logmsg.h"
#include "lpfc_version.h"
#include "lpfc_compat.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#include "lpfc_attr.h"

#define LPFC_DEF_DEVLOSS_TMO    30
#define LPFC_MIN_DEVLOSS_TMO    1
#define LPFC_MAX_DEVLOSS_TMO    255

/*
 * Write key size should be multiple of 4. If write key is changed
 * make sure that library write key is also changed.
 */
#define LPFC_REG_WRITE_KEY_SIZE 4
#define LPFC_REG_WRITE_KEY      "EMLX"

const char *const trunk_errmsg[] = {    /* map errcode */
        "",     /* There is no such error code at index 0*/
        "link negotiated speed does not match existing"
                " trunk - link was \"low\" speed",
        "link negotiated speed does not match"
                " existing trunk - link was \"middle\" speed",
        "link negotiated speed does not match existing"
                " trunk - link was \"high\" speed",
        "Attached to non-trunking port - F_Port",
        "Attached to non-trunking port - N_Port",
        "FLOGI response timeout",
        "non-FLOGI frame received",
        "Invalid FLOGI response",
        "Trunking initialization protocol",
        "Trunk peer device mismatch",
};

/**
 * lpfc_jedec_to_ascii - Hex to ascii convertor according to JEDEC rules
 * @incr: integer to convert.
 * @hdw: ascii string holding converted integer plus a string terminator.
 *
 * Description:
 * JEDEC Joint Electron Device Engineering Council.
 * Convert a 32 bit integer composed of 8 nibbles into an 8 byte ascii
 * character string. The string is then terminated with a NULL in byte 9.
 * Hex 0-9 becomes ascii '0' to '9'.
 * Hex a-f becomes ascii '=' to 'B' capital B.
 *
 * Notes:
 * Coded for 32 bit integers only.
 **/
static void
lpfc_jedec_to_ascii(int incr, char hdw[])
{
        int i, j;
        for (i = 0; i < 8; i++) {
                j = (incr & 0xf);
                if (j <= 9)
                        hdw[7 - i] = 0x30 +  j;
                 else
                        hdw[7 - i] = 0x61 + j - 10;
                incr = (incr >> 4);
        }
        hdw[8] = 0;
        return;
}

/**
 * lpfc_drvr_version_show - Return the Emulex driver string with version number
 * @dev: class unused variable.
 * @attr: device attribute, not used.
 * @buf: on return contains the module description text.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_drvr_version_show(struct device *dev, struct device_attribute *attr,
                       char *buf)
{
        return scnprintf(buf, PAGE_SIZE, LPFC_MODULE_DESC "\n");
}

/**
 * lpfc_enable_fip_show - Return the fip mode of the HBA
 * @dev: class unused variable.
 * @attr: device attribute, not used.
 * @buf: on return contains the module description text.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_enable_fip_show(struct device *dev, struct device_attribute *attr,
                       char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        if (phba->hba_flag & HBA_FIP_SUPPORT)
                return scnprintf(buf, PAGE_SIZE, "1\n");
        else
                return scnprintf(buf, PAGE_SIZE, "0\n");
}

static ssize_t
lpfc_nvme_info_show(struct device *dev, struct device_attribute *attr,
                    char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = shost_priv(shost);
        struct lpfc_hba   *phba = vport->phba;
        struct lpfc_nvmet_tgtport *tgtp;
        struct nvme_fc_local_port *localport;
        struct lpfc_nvme_lport *lport;
        struct lpfc_nvme_rport *rport;
        struct lpfc_nodelist *ndlp;
        struct nvme_fc_remote_port *nrport;
        struct lpfc_fc4_ctrl_stat *cstat;
        uint64_t data1, data2, data3;
        uint64_t totin, totout, tot;
        char *statep;
        int i;
        int len = 0;
        char tmp[LPFC_MAX_NVME_INFO_TMP_LEN] = {0};

        if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_NVME)) {
                len = scnprintf(buf, PAGE_SIZE, "NVME Disabled\n");
                return len;
        }
        if (phba->nvmet_support) {
                if (!phba->targetport) {
                        len = scnprintf(buf, PAGE_SIZE,
                                        "NVME Target: x%llx is not allocated\n",
                                        wwn_to_u64(vport->fc_portname.u.wwn));
                        return len;
                }
                /* Port state is only one of two values for now. */
                if (phba->targetport->port_id)
                        statep = "REGISTERED";
                else
                        statep = "INIT";
                scnprintf(tmp, sizeof(tmp),
                          "NVME Target Enabled  State %s\n",
                          statep);
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "%s%d WWPN x%llx WWNN x%llx DID x%06x\n",
                          "NVME Target: lpfc",
                          phba->brd_no,
                          wwn_to_u64(vport->fc_portname.u.wwn),
                          wwn_to_u64(vport->fc_nodename.u.wwn),
                          phba->targetport->port_id);
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                if (strlcat(buf, "\nNVME Target: Statistics\n", PAGE_SIZE)
                    >= PAGE_SIZE)
                        goto buffer_done;

                tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
                scnprintf(tmp, sizeof(tmp),
                          "LS: Rcv %08x Drop %08x Abort %08x\n",
                          atomic_read(&tgtp->rcv_ls_req_in),
                          atomic_read(&tgtp->rcv_ls_req_drop),
                          atomic_read(&tgtp->xmt_ls_abort));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                if (atomic_read(&tgtp->rcv_ls_req_in) !=
                    atomic_read(&tgtp->rcv_ls_req_out)) {
                        scnprintf(tmp, sizeof(tmp),
                                  "Rcv LS: in %08x != out %08x\n",
                                  atomic_read(&tgtp->rcv_ls_req_in),
                                  atomic_read(&tgtp->rcv_ls_req_out));
                        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                                goto buffer_done;
                }

                scnprintf(tmp, sizeof(tmp),
                          "LS: Xmt %08x Drop %08x Cmpl %08x\n",
                          atomic_read(&tgtp->xmt_ls_rsp),
                          atomic_read(&tgtp->xmt_ls_drop),
                          atomic_read(&tgtp->xmt_ls_rsp_cmpl));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "LS: RSP Abort %08x xb %08x Err %08x\n",
                          atomic_read(&tgtp->xmt_ls_rsp_aborted),
                          atomic_read(&tgtp->xmt_ls_rsp_xb_set),
                          atomic_read(&tgtp->xmt_ls_rsp_error));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "FCP: Rcv %08x Defer %08x Release %08x "
                          "Drop %08x\n",
                          atomic_read(&tgtp->rcv_fcp_cmd_in),
                          atomic_read(&tgtp->rcv_fcp_cmd_defer),
                          atomic_read(&tgtp->xmt_fcp_release),
                          atomic_read(&tgtp->rcv_fcp_cmd_drop));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                if (atomic_read(&tgtp->rcv_fcp_cmd_in) !=
                    atomic_read(&tgtp->rcv_fcp_cmd_out)) {
                        scnprintf(tmp, sizeof(tmp),
                                  "Rcv FCP: in %08x != out %08x\n",
                                  atomic_read(&tgtp->rcv_fcp_cmd_in),
                                  atomic_read(&tgtp->rcv_fcp_cmd_out));
                        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                                goto buffer_done;
                }

                scnprintf(tmp, sizeof(tmp),
                          "FCP Rsp: RD %08x rsp %08x WR %08x rsp %08x "
                          "drop %08x\n",
                          atomic_read(&tgtp->xmt_fcp_read),
                          atomic_read(&tgtp->xmt_fcp_read_rsp),
                          atomic_read(&tgtp->xmt_fcp_write),
                          atomic_read(&tgtp->xmt_fcp_rsp),
                          atomic_read(&tgtp->xmt_fcp_drop));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "FCP Rsp Cmpl: %08x err %08x drop %08x\n",
                          atomic_read(&tgtp->xmt_fcp_rsp_cmpl),
                          atomic_read(&tgtp->xmt_fcp_rsp_error),
                          atomic_read(&tgtp->xmt_fcp_rsp_drop));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "FCP Rsp Abort: %08x xb %08x xricqe  %08x\n",
                          atomic_read(&tgtp->xmt_fcp_rsp_aborted),
                          atomic_read(&tgtp->xmt_fcp_rsp_xb_set),
                          atomic_read(&tgtp->xmt_fcp_xri_abort_cqe));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "ABORT: Xmt %08x Cmpl %08x\n",
                          atomic_read(&tgtp->xmt_fcp_abort),
                          atomic_read(&tgtp->xmt_fcp_abort_cmpl));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "ABORT: Sol %08x  Usol %08x Err %08x Cmpl %08x\n",
                          atomic_read(&tgtp->xmt_abort_sol),
                          atomic_read(&tgtp->xmt_abort_unsol),
                          atomic_read(&tgtp->xmt_abort_rsp),
                          atomic_read(&tgtp->xmt_abort_rsp_error));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp),
                          "DELAY: ctx %08x  fod %08x wqfull %08x\n",
                          atomic_read(&tgtp->defer_ctx),
                          atomic_read(&tgtp->defer_fod),
                          atomic_read(&tgtp->defer_wqfull));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                /* Calculate outstanding IOs */
                tot = atomic_read(&tgtp->rcv_fcp_cmd_drop);
                tot += atomic_read(&tgtp->xmt_fcp_release);
                tot = atomic_read(&tgtp->rcv_fcp_cmd_in) - tot;

                scnprintf(tmp, sizeof(tmp),
                          "IO_CTX: %08x  WAIT: cur %08x tot %08x\n"
                          "CTX Outstanding %08llx\n\n",
                          phba->sli4_hba.nvmet_xri_cnt,
                          phba->sli4_hba.nvmet_io_wait_cnt,
                          phba->sli4_hba.nvmet_io_wait_total,
                          tot);
                strlcat(buf, tmp, PAGE_SIZE);
                goto buffer_done;
        }

        localport = vport->localport;
        if (!localport) {
                len = scnprintf(buf, PAGE_SIZE,
                                "NVME Initiator x%llx is not allocated\n",
                                wwn_to_u64(vport->fc_portname.u.wwn));
                return len;
        }
        lport = (struct lpfc_nvme_lport *)localport->private;
        if (strlcat(buf, "\nNVME Initiator Enabled\n", PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        scnprintf(tmp, sizeof(tmp),
                  "XRI Dist lpfc%d Total %d IO %d ELS %d\n",
                  phba->brd_no,
                  phba->sli4_hba.max_cfg_param.max_xri,
                  phba->sli4_hba.io_xri_max,
                  lpfc_sli4_get_els_iocb_cnt(phba));
        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        /* Port state is only one of two values for now. */
        if (localport->port_id)
                statep = "ONLINE";
        else
                statep = "UNKNOWN ";

        scnprintf(tmp, sizeof(tmp),
                  "%s%d WWPN x%llx WWNN x%llx DID x%06x %s\n",
                  "NVME LPORT lpfc",
                  phba->brd_no,
                  wwn_to_u64(vport->fc_portname.u.wwn),
                  wwn_to_u64(vport->fc_nodename.u.wwn),
                  localport->port_id, statep);
        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        spin_lock_irq(shost->host_lock);

        list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
                nrport = NULL;
                spin_lock(&ndlp->lock);
                rport = lpfc_ndlp_get_nrport(ndlp);
                if (rport)
                        nrport = rport->remoteport;
                spin_unlock(&ndlp->lock);
                if (!nrport)
                        continue;

                /* Port state is only one of two values for now. */
                switch (nrport->port_state) {
                case FC_OBJSTATE_ONLINE:
                        statep = "ONLINE";
                        break;
                case FC_OBJSTATE_UNKNOWN:
                        statep = "UNKNOWN ";
                        break;
                default:
                        statep = "UNSUPPORTED";
                        break;
                }

                /* Tab in to show lport ownership. */
                if (strlcat(buf, "NVME RPORT       ", PAGE_SIZE) >= PAGE_SIZE)
                        goto unlock_buf_done;
                if (phba->brd_no >= 10) {
                        if (strlcat(buf, " ", PAGE_SIZE) >= PAGE_SIZE)
                                goto unlock_buf_done;
                }

                scnprintf(tmp, sizeof(tmp), "WWPN x%llx ",
                          nrport->port_name);
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto unlock_buf_done;

                scnprintf(tmp, sizeof(tmp), "WWNN x%llx ",
                          nrport->node_name);
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto unlock_buf_done;

                scnprintf(tmp, sizeof(tmp), "DID x%06x ",
                          nrport->port_id);
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto unlock_buf_done;

                /* An NVME rport can have multiple roles. */
                if (nrport->port_role & FC_PORT_ROLE_NVME_INITIATOR) {
                        if (strlcat(buf, "INITIATOR ", PAGE_SIZE) >= PAGE_SIZE)
                                goto unlock_buf_done;
                }
                if (nrport->port_role & FC_PORT_ROLE_NVME_TARGET) {
                        if (strlcat(buf, "TARGET ", PAGE_SIZE) >= PAGE_SIZE)
                                goto unlock_buf_done;
                }
                if (nrport->port_role & FC_PORT_ROLE_NVME_DISCOVERY) {
                        if (strlcat(buf, "DISCSRVC ", PAGE_SIZE) >= PAGE_SIZE)
                                goto unlock_buf_done;
                }
                if (nrport->port_role & ~(FC_PORT_ROLE_NVME_INITIATOR |
                                          FC_PORT_ROLE_NVME_TARGET |
                                          FC_PORT_ROLE_NVME_DISCOVERY)) {
                        scnprintf(tmp, sizeof(tmp), "UNKNOWN ROLE x%x",
                                  nrport->port_role);
                        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                                goto unlock_buf_done;
                }

                scnprintf(tmp, sizeof(tmp), "%s\n", statep);
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto unlock_buf_done;
        }
        spin_unlock_irq(shost->host_lock);

        if (!lport)
                goto buffer_done;

        if (strlcat(buf, "\nNVME Statistics\n", PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        scnprintf(tmp, sizeof(tmp),
                  "LS: Xmt %010x Cmpl %010x Abort %08x\n",
                  atomic_read(&lport->fc4NvmeLsRequests),
                  atomic_read(&lport->fc4NvmeLsCmpls),
                  atomic_read(&lport->xmt_ls_abort));
        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        scnprintf(tmp, sizeof(tmp),
                  "LS XMIT: Err %08x  CMPL: xb %08x Err %08x\n",
                  atomic_read(&lport->xmt_ls_err),
                  atomic_read(&lport->cmpl_ls_xb),
                  atomic_read(&lport->cmpl_ls_err));
        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        totin = 0;
        totout = 0;
        for (i = 0; i < phba->cfg_hdw_queue; i++) {
                cstat = &phba->sli4_hba.hdwq[i].nvme_cstat;
                tot = cstat->io_cmpls;
                totin += tot;
                data1 = cstat->input_requests;
                data2 = cstat->output_requests;
                data3 = cstat->control_requests;
                totout += (data1 + data2 + data3);
        }
        scnprintf(tmp, sizeof(tmp),
                  "Total FCP Cmpl %016llx Issue %016llx "
                  "OutIO %016llx\n",
                  totin, totout, totout - totin);
        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        scnprintf(tmp, sizeof(tmp),
                  "\tabort %08x noxri %08x nondlp %08x qdepth %08x "
                  "wqerr %08x err %08x\n",
                  atomic_read(&lport->xmt_fcp_abort),
                  atomic_read(&lport->xmt_fcp_noxri),
                  atomic_read(&lport->xmt_fcp_bad_ndlp),
                  atomic_read(&lport->xmt_fcp_qdepth),
                  atomic_read(&lport->xmt_fcp_wqerr),
                  atomic_read(&lport->xmt_fcp_err));
        if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                goto buffer_done;

        scnprintf(tmp, sizeof(tmp),
                  "FCP CMPL: xb %08x Err %08x\n",
                  atomic_read(&lport->cmpl_fcp_xb),
                  atomic_read(&lport->cmpl_fcp_err));
        strlcat(buf, tmp, PAGE_SIZE);

        /* host_lock is already unlocked. */
        goto buffer_done;

 unlock_buf_done:
        spin_unlock_irq(shost->host_lock);

 buffer_done:
        len = strnlen(buf, PAGE_SIZE);

        if (unlikely(len >= (PAGE_SIZE - 1))) {
                lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
                                "6314 Catching potential buffer "
                                "overflow > PAGE_SIZE = %lu bytes\n",
                                PAGE_SIZE);
                strlcpy(buf + PAGE_SIZE - 1 - sizeof(LPFC_NVME_INFO_MORE_STR),
                        LPFC_NVME_INFO_MORE_STR,
                        sizeof(LPFC_NVME_INFO_MORE_STR) + 1);
        }

        return len;
}

static ssize_t
lpfc_scsi_stat_show(struct device *dev, struct device_attribute *attr,
                    char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = shost_priv(shost);
        struct lpfc_hba *phba = vport->phba;
        int len;
        struct lpfc_fc4_ctrl_stat *cstat;
        u64 data1, data2, data3;
        u64 tot, totin, totout;
        int i;
        char tmp[LPFC_MAX_SCSI_INFO_TMP_LEN] = {0};

        if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP) ||
            (phba->sli_rev != LPFC_SLI_REV4))
                return 0;

        scnprintf(buf, PAGE_SIZE, "SCSI HDWQ Statistics\n");

        totin = 0;
        totout = 0;
        for (i = 0; i < phba->cfg_hdw_queue; i++) {
                cstat = &phba->sli4_hba.hdwq[i].scsi_cstat;
                tot = cstat->io_cmpls;
                totin += tot;
                data1 = cstat->input_requests;
                data2 = cstat->output_requests;
                data3 = cstat->control_requests;
                totout += (data1 + data2 + data3);

                scnprintf(tmp, sizeof(tmp), "HDWQ (%d): Rd %016llx Wr %016llx "
                          "IO %016llx ", i, data1, data2, data3);
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;

                scnprintf(tmp, sizeof(tmp), "Cmpl %016llx OutIO %016llx\n",
                          tot, ((data1 + data2 + data3) - tot));
                if (strlcat(buf, tmp, PAGE_SIZE) >= PAGE_SIZE)
                        goto buffer_done;
        }
        scnprintf(tmp, sizeof(tmp), "Total FCP Cmpl %016llx Issue %016llx "
                  "OutIO %016llx\n", totin, totout, totout - totin);
        strlcat(buf, tmp, PAGE_SIZE);

buffer_done:
        len = strnlen(buf, PAGE_SIZE);

        return len;
}

static ssize_t
lpfc_bg_info_show(struct device *dev, struct device_attribute *attr,
                  char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        if (phba->cfg_enable_bg) {
                if (phba->sli3_options & LPFC_SLI3_BG_ENABLED)
                        return scnprintf(buf, PAGE_SIZE,
                                        "BlockGuard Enabled\n");
                else
                        return scnprintf(buf, PAGE_SIZE,
                                        "BlockGuard Not Supported\n");
        } else
                return scnprintf(buf, PAGE_SIZE,
                                        "BlockGuard Disabled\n");
}

static ssize_t
lpfc_bg_guard_err_show(struct device *dev, struct device_attribute *attr,
                       char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%llu\n",
                        (unsigned long long)phba->bg_guard_err_cnt);
}

static ssize_t
lpfc_bg_apptag_err_show(struct device *dev, struct device_attribute *attr,
                        char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%llu\n",
                        (unsigned long long)phba->bg_apptag_err_cnt);
}

static ssize_t
lpfc_bg_reftag_err_show(struct device *dev, struct device_attribute *attr,
                        char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%llu\n",
                        (unsigned long long)phba->bg_reftag_err_cnt);
}

/**
 * lpfc_info_show - Return some pci info about the host in ascii
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the formatted text from lpfc_info().
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_info_show(struct device *dev, struct device_attribute *attr,
               char *buf)
{
        struct Scsi_Host *host = class_to_shost(dev);

        return scnprintf(buf, PAGE_SIZE, "%s\n", lpfc_info(host));
}

/**
 * lpfc_serialnum_show - Return the hba serial number in ascii
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the formatted text serial number.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_serialnum_show(struct device *dev, struct device_attribute *attr,
                    char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%s\n", phba->SerialNumber);
}

/**
 * lpfc_temp_sensor_show - Return the temperature sensor level
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the formatted support level.
 *
 * Description:
 * Returns a number indicating the temperature sensor level currently
 * supported, zero or one in ascii.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_temp_sensor_show(struct device *dev, struct device_attribute *attr,
                      char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        return scnprintf(buf, PAGE_SIZE, "%d\n", phba->temp_sensor_support);
}

/**
 * lpfc_modeldesc_show - Return the model description of the hba
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the scsi vpd model description.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_modeldesc_show(struct device *dev, struct device_attribute *attr,
                    char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%s\n", phba->ModelDesc);
}

/**
 * lpfc_modelname_show - Return the model name of the hba
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the scsi vpd model name.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_modelname_show(struct device *dev, struct device_attribute *attr,
                    char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%s\n", phba->ModelName);
}

/**
 * lpfc_programtype_show - Return the program type of the hba
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the scsi vpd program type.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_programtype_show(struct device *dev, struct device_attribute *attr,
                      char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%s\n", phba->ProgramType);
}

/**
 * lpfc_mlomgmt_show - Return the Menlo Maintenance sli flag
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the Menlo Maintenance sli flag.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_mlomgmt_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%d\n",
                (phba->sli.sli_flag & LPFC_MENLO_MAINT));
}

/**
 * lpfc_vportnum_show - Return the port number in ascii of the hba
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains scsi vpd program type.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_vportnum_show(struct device *dev, struct device_attribute *attr,
                   char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%s\n", phba->Port);
}

/**
 * lpfc_fwrev_show - Return the firmware rev running in the hba
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the scsi vpd program type.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_fwrev_show(struct device *dev, struct device_attribute *attr,
                char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        uint32_t if_type;
        uint8_t sli_family;
        char fwrev[FW_REV_STR_SIZE];
        int len;

        lpfc_decode_firmware_rev(phba, fwrev, 1);
        if_type = phba->sli4_hba.pc_sli4_params.if_type;
        sli_family = phba->sli4_hba.pc_sli4_params.sli_family;

        if (phba->sli_rev < LPFC_SLI_REV4)
                len = scnprintf(buf, PAGE_SIZE, "%s, sli-%d\n",
                               fwrev, phba->sli_rev);
        else
                len = scnprintf(buf, PAGE_SIZE, "%s, sli-%d:%d:%x\n",
                               fwrev, phba->sli_rev, if_type, sli_family);

        return len;
}

/**
 * lpfc_hdw_show - Return the jedec information about the hba
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the scsi vpd program type.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_hdw_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        char hdw[9];
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        lpfc_vpd_t *vp = &phba->vpd;

        lpfc_jedec_to_ascii(vp->rev.biuRev, hdw);
        return scnprintf(buf, PAGE_SIZE, "%s %08x %08x\n", hdw,
                         vp->rev.smRev, vp->rev.smFwRev);
}

/**
 * lpfc_option_rom_version_show - Return the adapter ROM FCode version
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the ROM and FCode ascii strings.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_option_rom_version_show(struct device *dev, struct device_attribute *attr,
                             char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        char fwrev[FW_REV_STR_SIZE];

        if (phba->sli_rev < LPFC_SLI_REV4)
                return scnprintf(buf, PAGE_SIZE, "%s\n",
                                phba->OptionROMVersion);

        lpfc_decode_firmware_rev(phba, fwrev, 1);
        return scnprintf(buf, PAGE_SIZE, "%s\n", fwrev);
}

/**
 * lpfc_link_state_show - Return the link state of the port
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains text describing the state of the link.
 *
 * Notes:
 * The switch statement has no default so zero will be returned.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_link_state_show(struct device *dev, struct device_attribute *attr,
                     char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int  len = 0;

        switch (phba->link_state) {
        case LPFC_LINK_UNKNOWN:
        case LPFC_WARM_START:
        case LPFC_INIT_START:
        case LPFC_INIT_MBX_CMDS:
        case LPFC_LINK_DOWN:
        case LPFC_HBA_ERROR:
                if (phba->hba_flag & LINK_DISABLED)
                        len += scnprintf(buf + len, PAGE_SIZE-len,
                                "Link Down - User disabled\n");
                else
                        len += scnprintf(buf + len, PAGE_SIZE-len,
                                "Link Down\n");
                break;
        case LPFC_LINK_UP:
        case LPFC_CLEAR_LA:
        case LPFC_HBA_READY:
                len += scnprintf(buf + len, PAGE_SIZE-len, "Link Up - ");

                switch (vport->port_state) {
                case LPFC_LOCAL_CFG_LINK:
                        len += scnprintf(buf + len, PAGE_SIZE-len,
                                        "Configuring Link\n");
                        break;
                case LPFC_FDISC:
                case LPFC_FLOGI:
                case LPFC_FABRIC_CFG_LINK:
                case LPFC_NS_REG:
                case LPFC_NS_QRY:
                case LPFC_BUILD_DISC_LIST:
                case LPFC_DISC_AUTH:
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                        "Discovery\n");
                        break;
                case LPFC_VPORT_READY:
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                        "Ready\n");
                        break;

                case LPFC_VPORT_FAILED:
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                        "Failed\n");
                        break;

                case LPFC_VPORT_UNKNOWN:
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                        "Unknown\n");
                        break;
                }
                if (phba->sli.sli_flag & LPFC_MENLO_MAINT)
                        len += scnprintf(buf + len, PAGE_SIZE-len,
                                        "   Menlo Maint Mode\n");
                else if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
                        if (vport->fc_flag & FC_PUBLIC_LOOP)
                                len += scnprintf(buf + len, PAGE_SIZE-len,
                                                "   Public Loop\n");
                        else
                                len += scnprintf(buf + len, PAGE_SIZE-len,
                                                "   Private Loop\n");
                } else {
                        if (vport->fc_flag & FC_FABRIC)
                                len += scnprintf(buf + len, PAGE_SIZE-len,
                                                "   Fabric\n");
                        else
                                len += scnprintf(buf + len, PAGE_SIZE-len,
                                                "   Point-2-Point\n");
                }
        }

        if ((phba->sli_rev == LPFC_SLI_REV4) &&
            ((bf_get(lpfc_sli_intf_if_type,
             &phba->sli4_hba.sli_intf) ==
             LPFC_SLI_INTF_IF_TYPE_6))) {
                struct lpfc_trunk_link link = phba->trunk_link;

                if (bf_get(lpfc_conf_trunk_port0, &phba->sli4_hba))
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                "Trunk port 0: Link %s %s\n",
                                (link.link0.state == LPFC_LINK_UP) ?
                                 "Up" : "Down. ",
                                trunk_errmsg[link.link0.fault]);

                if (bf_get(lpfc_conf_trunk_port1, &phba->sli4_hba))
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                "Trunk port 1: Link %s %s\n",
                                (link.link1.state == LPFC_LINK_UP) ?
                                 "Up" : "Down. ",
                                trunk_errmsg[link.link1.fault]);

                if (bf_get(lpfc_conf_trunk_port2, &phba->sli4_hba))
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                "Trunk port 2: Link %s %s\n",
                                (link.link2.state == LPFC_LINK_UP) ?
                                 "Up" : "Down. ",
                                trunk_errmsg[link.link2.fault]);

                if (bf_get(lpfc_conf_trunk_port3, &phba->sli4_hba))
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                "Trunk port 3: Link %s %s\n",
                                (link.link3.state == LPFC_LINK_UP) ?
                                 "Up" : "Down. ",
                                trunk_errmsg[link.link3.fault]);

        }

        return len;
}

/**
 * lpfc_sli4_protocol_show - Return the fip mode of the HBA
 * @dev: class unused variable.
 * @attr: device attribute, not used.
 * @buf: on return contains the module description text.
 *
 * Returns: size of formatted string.
 **/
static ssize_t

lpfc_sli4_protocol_show(struct device *dev, struct device_attribute *attr,
                        char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba *phba = vport->phba;

        if (phba->sli_rev < LPFC_SLI_REV4)
                return scnprintf(buf, PAGE_SIZE, "fc\n");

        if (phba->sli4_hba.lnk_info.lnk_dv == LPFC_LNK_DAT_VAL) {
                if (phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_GE)
                        return scnprintf(buf, PAGE_SIZE, "fcoe\n");
                if (phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_FC)
                        return scnprintf(buf, PAGE_SIZE, "fc\n");
        }
        return scnprintf(buf, PAGE_SIZE, "unknown\n");
}

/**
 * lpfc_oas_supported_show - Return whether or not Optimized Access Storage
 *                          (OAS) is supported.
 * @dev: class unused variable.
 * @attr: device attribute, not used.
 * @buf: on return contains the module description text.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_oas_supported_show(struct device *dev, struct device_attribute *attr,
                        char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;
        struct lpfc_hba *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%d\n",
                        phba->sli4_hba.pc_sli4_params.oas_supported);
}

/**
 * lpfc_link_state_store - Transition the link_state on an HBA port
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: one or more lpfc_polling_flags values.
 * @count: not used.
 *
 * Returns:
 * -EINVAL if the buffer is not "up" or "down"
 * return from link state change function if non-zero
 * length of the buf on success
 **/
static ssize_t
lpfc_link_state_store(struct device *dev, struct device_attribute *attr,
                const char *buf, size_t count)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        int status = -EINVAL;

        if ((strncmp(buf, "up", sizeof("up") - 1) == 0) &&
                        (phba->link_state == LPFC_LINK_DOWN))
                status = phba->lpfc_hba_init_link(phba, MBX_NOWAIT);
        else if ((strncmp(buf, "down", sizeof("down") - 1) == 0) &&
                        (phba->link_state >= LPFC_LINK_UP))
                status = phba->lpfc_hba_down_link(phba, MBX_NOWAIT);

        if (status == 0)
                return strlen(buf);
        else
                return status;
}

/**
 * lpfc_num_discovered_ports_show - Return sum of mapped and unmapped vports
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the sum of fc mapped and unmapped.
 *
 * Description:
 * Returns the ascii text number of the sum of the fc mapped and unmapped
 * vport counts.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_num_discovered_ports_show(struct device *dev,
                               struct device_attribute *attr, char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;

        return scnprintf(buf, PAGE_SIZE, "%d\n",
                        vport->fc_map_cnt + vport->fc_unmap_cnt);
}

/**
 * lpfc_issue_lip - Misnomer, name carried over from long ago
 * @shost: Scsi_Host pointer.
 *
 * Description:
 * Bring the link down gracefully then re-init the link. The firmware will
 * re-init the fiber channel interface as required. Does not issue a LIP.
 *
 * Returns:
 * -EPERM port offline or management commands are being blocked
 * -ENOMEM cannot allocate memory for the mailbox command
 * -EIO error sending the mailbox command
 * zero for success
 **/
static int
lpfc_issue_lip(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        LPFC_MBOXQ_t *pmboxq;
        int mbxstatus = MBXERR_ERROR;

        /*
         * If the link is offline, disabled or BLOCK_MGMT_IO
         * it doesn't make any sense to allow issue_lip
         */
        if ((vport->fc_flag & FC_OFFLINE_MODE) ||
            (phba->hba_flag & LINK_DISABLED) ||
            (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO))
                return -EPERM;

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

        if (!pmboxq)
                return -ENOMEM;

        memset((void *)pmboxq, 0, sizeof (LPFC_MBOXQ_t));
        pmboxq->u.mb.mbxCommand = MBX_DOWN_LINK;
        pmboxq->u.mb.mbxOwner = OWN_HOST;

        mbxstatus = lpfc_sli_issue_mbox_wait(phba, pmboxq, LPFC_MBOX_TMO * 2);

        if ((mbxstatus == MBX_SUCCESS) &&
            (pmboxq->u.mb.mbxStatus == 0 ||
             pmboxq->u.mb.mbxStatus == MBXERR_LINK_DOWN)) {
                memset((void *)pmboxq, 0, sizeof (LPFC_MBOXQ_t));
                lpfc_init_link(phba, pmboxq, phba->cfg_topology,
                               phba->cfg_link_speed);
                mbxstatus = lpfc_sli_issue_mbox_wait(phba, pmboxq,
                                                     phba->fc_ratov * 2);
                if ((mbxstatus == MBX_SUCCESS) &&
                    (pmboxq->u.mb.mbxStatus == MBXERR_SEC_NO_PERMISSION))
                        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
                                        "2859 SLI authentication is required "
                                        "for INIT_LINK but has not done yet\n");
        }

        lpfc_set_loopback_flag(phba);
        if (mbxstatus != MBX_TIMEOUT)
                mempool_free(pmboxq, phba->mbox_mem_pool);

        if (mbxstatus == MBXERR_ERROR)
                return -EIO;

        return 0;
}

int
lpfc_emptyq_wait(struct lpfc_hba *phba, struct list_head *q, spinlock_t *lock)
{
        int cnt = 0;

        spin_lock_irq(lock);
        while (!list_empty(q)) {
                spin_unlock_irq(lock);
                msleep(20);
                if (cnt++ > 250) {  /* 5 secs */
                        lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                        "0466 Outstanding IO when "
                                        "bringing Adapter offline\n");
                                return 0;
                }
                spin_lock_irq(lock);
        }
        spin_unlock_irq(lock);
        return 1;
}

/**
 * lpfc_do_offline - Issues a mailbox command to bring the link down
 * @phba: lpfc_hba pointer.
 * @type: LPFC_EVT_OFFLINE, LPFC_EVT_WARM_START, LPFC_EVT_KILL.
 *
 * Notes:
 * Assumes any error from lpfc_do_offline() will be negative.
 * Can wait up to 5 seconds for the port ring buffers count
 * to reach zero, prints a warning if it is not zero and continues.
 * lpfc_workq_post_event() returns a non-zero return code if call fails.
 *
 * Returns:
 * -EIO error posting the event
 * zero for success
 **/
static int
lpfc_do_offline(struct lpfc_hba *phba, uint32_t type)
{
        struct completion online_compl;
        struct lpfc_queue *qp = NULL;
        struct lpfc_sli_ring *pring;
        struct lpfc_sli *psli;
        int status = 0;
        int i;
        int rc;

        init_completion(&online_compl);
        rc = lpfc_workq_post_event(phba, &status, &online_compl,
                              LPFC_EVT_OFFLINE_PREP);
        if (rc == 0)
                return -ENOMEM;

        wait_for_completion(&online_compl);

        if (status != 0)
                return -EIO;

        psli = &phba->sli;

        /*
         * If freeing the queues have already started, don't access them.
         * Otherwise set FREE_WAIT to indicate that queues are being used
         * to hold the freeing process until we finish.
         */
        spin_lock_irq(&phba->hbalock);
        if (!(psli->sli_flag & LPFC_QUEUE_FREE_INIT)) {
                psli->sli_flag |= LPFC_QUEUE_FREE_WAIT;
        } else {
                spin_unlock_irq(&phba->hbalock);
                goto skip_wait;
        }
        spin_unlock_irq(&phba->hbalock);

        /* Wait a little for things to settle down, but not
         * long enough for dev loss timeout to expire.
         */
        if (phba->sli_rev != LPFC_SLI_REV4) {
                for (i = 0; i < psli->num_rings; i++) {
                        pring = &psli->sli3_ring[i];
                        if (!lpfc_emptyq_wait(phba, &pring->txcmplq,
                                              &phba->hbalock))
                                goto out;
                }
        } else {
                list_for_each_entry(qp, &phba->sli4_hba.lpfc_wq_list, wq_list) {
                        pring = qp->pring;
                        if (!pring)
                                continue;
                        if (!lpfc_emptyq_wait(phba, &pring->txcmplq,
                                              &pring->ring_lock))
                                goto out;
                }
        }
out:
        spin_lock_irq(&phba->hbalock);
        psli->sli_flag &= ~LPFC_QUEUE_FREE_WAIT;
        spin_unlock_irq(&phba->hbalock);

skip_wait:
        init_completion(&online_compl);
        rc = lpfc_workq_post_event(phba, &status, &online_compl, type);
        if (rc == 0)
                return -ENOMEM;

        wait_for_completion(&online_compl);

        if (status != 0)
                return -EIO;

        return 0;
}

/**
 * lpfc_reset_pci_bus - resets PCI bridge controller's secondary bus of an HBA
 * @phba: lpfc_hba pointer.
 *
 * Description:
 * Issues a PCI secondary bus reset for the phba->pcidev.
 *
 * Notes:
 * First walks the bus_list to ensure only PCI devices with Emulex
 * vendor id, device ids that support hot reset, only one occurrence
 * of function 0, and all ports on the bus are in offline mode to ensure the
 * hot reset only affects one valid HBA.
 *
 * Returns:
 * -ENOTSUPP, cfg_enable_hba_reset must be of value 2
 * -ENODEV,   NULL ptr to pcidev
 * -EBADSLT,  detected invalid device
 * -EBUSY,    port is not in offline state
 *      0,    successful
 */
static int
lpfc_reset_pci_bus(struct lpfc_hba *phba)
{
        struct pci_dev *pdev = phba->pcidev;
        struct Scsi_Host *shost = NULL;
        struct lpfc_hba *phba_other = NULL;
        struct pci_dev *ptr = NULL;
        int res;

        if (phba->cfg_enable_hba_reset != 2)
                return -ENOTSUPP;

        if (!pdev) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT, "8345 pdev NULL!\n");
                return -ENODEV;
        }

        res = lpfc_check_pci_resettable(phba);
        if (res)
                return res;

        /* Walk the list of devices on the pci_dev's bus */
        list_for_each_entry(ptr, &pdev->bus->devices, bus_list) {
                /* Check port is offline */
                shost = pci_get_drvdata(ptr);
                if (shost) {
                        phba_other =
                                ((struct lpfc_vport *)shost->hostdata)->phba;
                        if (!(phba_other->pport->fc_flag & FC_OFFLINE_MODE)) {
                                lpfc_printf_log(phba_other, KERN_INFO, LOG_INIT,
                                                "8349 WWPN = 0x%02x%02x%02x%02x"
                                                "%02x%02x%02x%02x is not "
                                                "offline!\n",
                                                phba_other->wwpn[0],
                                                phba_other->wwpn[1],
                                                phba_other->wwpn[2],
                                                phba_other->wwpn[3],
                                                phba_other->wwpn[4],
                                                phba_other->wwpn[5],
                                                phba_other->wwpn[6],
                                                phba_other->wwpn[7]);
                                return -EBUSY;
                        }
                }
        }

        /* Issue PCI bus reset */
        res = pci_reset_bus(pdev);
        if (res) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "8350 PCI reset bus failed: %d\n", res);
        }

        return res;
}

/**
 * lpfc_selective_reset - Offline then onlines the port
 * @phba: lpfc_hba pointer.
 *
 * Description:
 * If the port is configured to allow a reset then the hba is brought
 * offline then online.
 *
 * Notes:
 * Assumes any error from lpfc_do_offline() will be negative.
 * Do not make this function static.
 *
 * Returns:
 * lpfc_do_offline() return code if not zero
 * -EIO reset not configured or error posting the event
 * zero for success
 **/
int
lpfc_selective_reset(struct lpfc_hba *phba)
{
        struct completion online_compl;
        int status = 0;
        int rc;

        if (!phba->cfg_enable_hba_reset)
                return -EACCES;

        if (!(phba->pport->fc_flag & FC_OFFLINE_MODE)) {
                status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);

                if (status != 0)
                        return status;
        }

        init_completion(&online_compl);
        rc = lpfc_workq_post_event(phba, &status, &online_compl,
                              LPFC_EVT_ONLINE);
        if (rc == 0)
                return -ENOMEM;

        wait_for_completion(&online_compl);

        if (status != 0)
                return -EIO;

        return 0;
}

/**
 * lpfc_issue_reset - Selectively resets an adapter
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing the string "selective".
 * @count: unused variable.
 *
 * Description:
 * If the buf contains the string "selective" then lpfc_selective_reset()
 * is called to perform the reset.
 *
 * Notes:
 * Assumes any error from lpfc_selective_reset() will be negative.
 * If lpfc_selective_reset() returns zero then the length of the buffer
 * is returned which indicates success
 *
 * Returns:
 * -EINVAL if the buffer does not contain the string "selective"
 * length of buf if lpfc-selective_reset() if the call succeeds
 * return value of lpfc_selective_reset() if the call fails
**/
static ssize_t
lpfc_issue_reset(struct device *dev, struct device_attribute *attr,
                 const char *buf, size_t count)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int status = -EINVAL;

        if (!phba->cfg_enable_hba_reset)
                return -EACCES;

        if (strncmp(buf, "selective", sizeof("selective") - 1) == 0)
                status = phba->lpfc_selective_reset(phba);

        if (status == 0)
                return strlen(buf);
        else
                return status;
}

/**
 * lpfc_sli4_pdev_status_reg_wait - Wait for pdev status register for readyness
 * @phba: lpfc_hba pointer.
 *
 * Description:
 * SLI4 interface type-2 device to wait on the sliport status register for
 * the readyness after performing a firmware reset.
 *
 * Returns:
 * zero for success, -EPERM when port does not have privilege to perform the
 * reset, -EIO when port timeout from recovering from the reset.
 *
 * Note:
 * As the caller will interpret the return code by value, be careful in making
 * change or addition to return codes.
 **/
int
lpfc_sli4_pdev_status_reg_wait(struct lpfc_hba *phba)
{
        struct lpfc_register portstat_reg = {0};
        int i;

        msleep(100);
        if (lpfc_readl(phba->sli4_hba.u.if_type2.STATUSregaddr,
                       &portstat_reg.word0))
                return -EIO;

        /* verify if privileged for the request operation */
        if (!bf_get(lpfc_sliport_status_rn, &portstat_reg) &&
            !bf_get(lpfc_sliport_status_err, &portstat_reg))
                return -EPERM;

        /* wait for the SLI port firmware ready after firmware reset */
        for (i = 0; i < LPFC_FW_RESET_MAXIMUM_WAIT_10MS_CNT; i++) {
                msleep(10);
                if (lpfc_readl(phba->sli4_hba.u.if_type2.STATUSregaddr,
                               &portstat_reg.word0))
                        continue;
                if (!bf_get(lpfc_sliport_status_err, &portstat_reg))
                        continue;
                if (!bf_get(lpfc_sliport_status_rn, &portstat_reg))
                        continue;
                if (!bf_get(lpfc_sliport_status_rdy, &portstat_reg))
                        continue;
                break;
        }

        if (i < LPFC_FW_RESET_MAXIMUM_WAIT_10MS_CNT)
                return 0;
        else
                return -EIO;
}

/**
 * lpfc_sli4_pdev_reg_request - Request physical dev to perform a register acc
 * @phba: lpfc_hba pointer.
 * @opcode: The sli4 config command opcode.
 *
 * Description:
 * Request SLI4 interface type-2 device to perform a physical register set
 * access.
 *
 * Returns:
 * zero for success
 **/
static ssize_t
lpfc_sli4_pdev_reg_request(struct lpfc_hba *phba, uint32_t opcode)
{
        struct completion online_compl;
        struct pci_dev *pdev = phba->pcidev;
        uint32_t before_fc_flag;
        uint32_t sriov_nr_virtfn;
        uint32_t reg_val;
        int status = 0, rc = 0;
        int job_posted = 1, sriov_err;

        if (!phba->cfg_enable_hba_reset)
                return -EACCES;

        if ((phba->sli_rev < LPFC_SLI_REV4) ||
            (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
             LPFC_SLI_INTF_IF_TYPE_2))
                return -EPERM;

        /* Keep state if we need to restore back */
        before_fc_flag = phba->pport->fc_flag;
        sriov_nr_virtfn = phba->cfg_sriov_nr_virtfn;

        /* Disable SR-IOV virtual functions if enabled */
        if (phba->cfg_sriov_nr_virtfn) {
                pci_disable_sriov(pdev);
                phba->cfg_sriov_nr_virtfn = 0;
        }

        if (opcode == LPFC_FW_DUMP)
                phba->hba_flag |= HBA_FW_DUMP_OP;

        status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);

        if (status != 0) {
                phba->hba_flag &= ~HBA_FW_DUMP_OP;
                return status;
        }

        /* wait for the device to be quiesced before firmware reset */
        msleep(100);

        reg_val = readl(phba->sli4_hba.conf_regs_memmap_p +
                        LPFC_CTL_PDEV_CTL_OFFSET);

        if (opcode == LPFC_FW_DUMP)
                reg_val |= LPFC_FW_DUMP_REQUEST;
        else if (opcode == LPFC_FW_RESET)
                reg_val |= LPFC_CTL_PDEV_CTL_FRST;
        else if (opcode == LPFC_DV_RESET)
                reg_val |= LPFC_CTL_PDEV_CTL_DRST;

        writel(reg_val, phba->sli4_hba.conf_regs_memmap_p +
               LPFC_CTL_PDEV_CTL_OFFSET);
        /* flush */
        readl(phba->sli4_hba.conf_regs_memmap_p + LPFC_CTL_PDEV_CTL_OFFSET);

        /* delay driver action following IF_TYPE_2 reset */
        rc = lpfc_sli4_pdev_status_reg_wait(phba);

        if (rc == -EPERM) {
                /* no privilege for reset */
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "3150 No privilege to perform the requested "
                                "access: x%x\n", reg_val);
        } else if (rc == -EIO) {
                /* reset failed, there is nothing more we can do */
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "3153 Fail to perform the requested "
                                "access: x%x\n", reg_val);
                return rc;
        }

        /* keep the original port state */
        if (before_fc_flag & FC_OFFLINE_MODE)
                goto out;

        init_completion(&online_compl);
        job_posted = lpfc_workq_post_event(phba, &status, &online_compl,
                                           LPFC_EVT_ONLINE);
        if (!job_posted)
                goto out;

        wait_for_completion(&online_compl);

out:
        /* in any case, restore the virtual functions enabled as before */
        if (sriov_nr_virtfn) {
                sriov_err =
                        lpfc_sli_probe_sriov_nr_virtfn(phba, sriov_nr_virtfn);
                if (!sriov_err)
                        phba->cfg_sriov_nr_virtfn = sriov_nr_virtfn;
        }

        /* return proper error code */
        if (!rc) {
                if (!job_posted)
                        rc = -ENOMEM;
                else if (status)
                        rc = -EIO;
        }
        return rc;
}

/**
 * lpfc_nport_evt_cnt_show - Return the number of nport events
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the ascii number of nport events.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_nport_evt_cnt_show(struct device *dev, struct device_attribute *attr,
                        char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        return scnprintf(buf, PAGE_SIZE, "%d\n", phba->nport_event_cnt);
}

static int
lpfc_set_trunking(struct lpfc_hba *phba, char *buff_out)
{
        LPFC_MBOXQ_t *mbox = NULL;
        unsigned long val = 0;
        char *pval = NULL;
        int rc = 0;

        if (!strncmp("enable", buff_out,
                                 strlen("enable"))) {
                pval = buff_out + strlen("enable") + 1;
                rc = kstrtoul(pval, 0, &val);
                if (rc)
                        return rc; /* Invalid  number */
        } else if (!strncmp("disable", buff_out,
                                 strlen("disable"))) {
                val = 0;
        } else {
                return -EINVAL;  /* Invalid command */
        }

        switch (val) {
        case 0:
                val = 0x0; /* Disable */
                break;
        case 2:
                val = 0x1; /* Enable two port trunk */
                break;
        case 4:
                val = 0x2; /* Enable four port trunk */
                break;
        default:
                return -EINVAL;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
                        "0070 Set trunk mode with val %ld ", val);

        mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!mbox)
                return -ENOMEM;

        lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_FCOE,
                         LPFC_MBOX_OPCODE_FCOE_FC_SET_TRUNK_MODE,
                         12, LPFC_SLI4_MBX_EMBED);

        bf_set(lpfc_mbx_set_trunk_mode,
               &mbox->u.mqe.un.set_trunk_mode,
               val);
        rc = lpfc_sli_issue_mbox(phba, mbox, MBX_POLL);
        if (rc)
                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
                                "0071 Set trunk mode failed with status: %d",
                                rc);
        mempool_free(mbox, phba->mbox_mem_pool);

        return 0;
}

/**
 * lpfc_board_mode_show - Return the state of the board
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the state of the adapter.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_board_mode_show(struct device *dev, struct device_attribute *attr,
                     char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        char  * state;

        if (phba->link_state == LPFC_HBA_ERROR)
                state = "error";
        else if (phba->link_state == LPFC_WARM_START)
                state = "warm start";
        else if (phba->link_state == LPFC_INIT_START)
                state = "offline";
        else
                state = "online";

        return scnprintf(buf, PAGE_SIZE, "%s\n", state);
}

/**
 * lpfc_board_mode_store - Puts the hba in online, offline, warm or error state
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing one of the strings "online", "offline", "warm" or "error".
 * @count: unused variable.
 *
 * Returns:
 * -EACCES if enable hba reset not enabled
 * -EINVAL if the buffer does not contain a valid string (see above)
 * -EIO if lpfc_workq_post_event() or lpfc_do_offline() fails
 * buf length greater than zero indicates success
 **/
static ssize_t
lpfc_board_mode_store(struct device *dev, struct device_attribute *attr,
                      const char *buf, size_t count)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        struct completion online_compl;
        char *board_mode_str = NULL;
        int status = 0;
        int rc;

        if (!phba->cfg_enable_hba_reset) {
                status = -EACCES;
                goto board_mode_out;
        }

        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                         "3050 lpfc_board_mode set to %s\n", buf);

        init_completion(&online_compl);

        if(strncmp(buf, "online", sizeof("online") - 1) == 0) {
                rc = lpfc_workq_post_event(phba, &status, &online_compl,
                                      LPFC_EVT_ONLINE);
                if (rc == 0) {
                        status = -ENOMEM;
                        goto board_mode_out;
                }
                wait_for_completion(&online_compl);
                if (status)
                        status = -EIO;
        } else if (strncmp(buf, "offline", sizeof("offline") - 1) == 0)
                status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);
        else if (strncmp(buf, "warm", sizeof("warm") - 1) == 0)
                if (phba->sli_rev == LPFC_SLI_REV4)
                        status = -EINVAL;
                else
                        status = lpfc_do_offline(phba, LPFC_EVT_WARM_START);
        else if (strncmp(buf, "error", sizeof("error") - 1) == 0)
                if (phba->sli_rev == LPFC_SLI_REV4)
                        status = -EINVAL;
                else
                        status = lpfc_do_offline(phba, LPFC_EVT_KILL);
        else if (strncmp(buf, "dump", sizeof("dump") - 1) == 0)
                status = lpfc_sli4_pdev_reg_request(phba, LPFC_FW_DUMP);
        else if (strncmp(buf, "fw_reset", sizeof("fw_reset") - 1) == 0)
                status = lpfc_sli4_pdev_reg_request(phba, LPFC_FW_RESET);
        else if (strncmp(buf, "dv_reset", sizeof("dv_reset") - 1) == 0)
                status = lpfc_sli4_pdev_reg_request(phba, LPFC_DV_RESET);
        else if (strncmp(buf, "pci_bus_reset", sizeof("pci_bus_reset") - 1)
                 == 0)
                status = lpfc_reset_pci_bus(phba);
        else if (strncmp(buf, "heartbeat", sizeof("heartbeat") - 1) == 0)
                lpfc_issue_hb_tmo(phba);
        else if (strncmp(buf, "trunk", sizeof("trunk") - 1) == 0)
                status = lpfc_set_trunking(phba, (char *)buf + sizeof("trunk"));
        else
                status = -EINVAL;

board_mode_out:
        if (!status)
                return strlen(buf);
        else {
                board_mode_str = strchr(buf, '\n');
                if (board_mode_str)
                        *board_mode_str = '\0';
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                 "3097 Failed \"%s\", status(%d), "
                                 "fc_flag(x%x)\n",
                                 buf, status, phba->pport->fc_flag);
                return status;
        }
}

/**
 * lpfc_get_hba_info - Return various bits of informaton about the adapter
 * @phba: pointer to the adapter structure.
 * @mxri: max xri count.
 * @axri: available xri count.
 * @mrpi: max rpi count.
 * @arpi: available rpi count.
 * @mvpi: max vpi count.
 * @avpi: available vpi count.
 *
 * Description:
 * If an integer pointer for an count is not null then the value for the
 * count is returned.
 *
 * Returns:
 * zero on error
 * one for success
 **/
static int
lpfc_get_hba_info(struct lpfc_hba *phba,
                  uint32_t *mxri, uint32_t *axri,
                  uint32_t *mrpi, uint32_t *arpi,
                  uint32_t *mvpi, uint32_t *avpi)
{
        struct lpfc_mbx_read_config *rd_config;
        LPFC_MBOXQ_t *pmboxq;
        MAILBOX_t *pmb;
        int rc = 0;
        uint32_t max_vpi;

        /*
         * prevent udev from issuing mailbox commands until the port is
         * configured.
         */
        if (phba->link_state < LPFC_LINK_DOWN ||
            !phba->mbox_mem_pool ||
            (phba->sli.sli_flag & LPFC_SLI_ACTIVE) == 0)
                return 0;

        if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO)
                return 0;

        pmboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
        if (!pmboxq)
                return 0;
        memset(pmboxq, 0, sizeof (LPFC_MBOXQ_t));

        pmb = &pmboxq->u.mb;
        pmb->mbxCommand = MBX_READ_CONFIG;
        pmb->mbxOwner = OWN_HOST;
        pmboxq->ctx_buf = NULL;

        if (phba->pport->fc_flag & FC_OFFLINE_MODE)
                rc = MBX_NOT_FINISHED;
        else
                rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

        if (rc != MBX_SUCCESS) {
                if (rc != MBX_TIMEOUT)
                        mempool_free(pmboxq, phba->mbox_mem_pool);
                return 0;
        }

        if (phba->sli_rev == LPFC_SLI_REV4) {
                rd_config = &pmboxq->u.mqe.un.rd_config;
                if (mrpi)
                        *mrpi = bf_get(lpfc_mbx_rd_conf_rpi_count, rd_config);
                if (arpi)
                        *arpi = bf_get(lpfc_mbx_rd_conf_rpi_count, rd_config) -
                                        phba->sli4_hba.max_cfg_param.rpi_used;
                if (mxri)
                        *mxri = bf_get(lpfc_mbx_rd_conf_xri_count, rd_config);
                if (axri)
                        *axri = bf_get(lpfc_mbx_rd_conf_xri_count, rd_config) -
                                        phba->sli4_hba.max_cfg_param.xri_used;

                /* Account for differences with SLI-3.  Get vpi count from
                 * mailbox data and subtract one for max vpi value.
                 */
                max_vpi = (bf_get(lpfc_mbx_rd_conf_vpi_count, rd_config) > 0) ?
                        (bf_get(lpfc_mbx_rd_conf_vpi_count, rd_config) - 1) : 0;

                /* Limit the max we support */
                if (max_vpi > LPFC_MAX_VPI)
                        max_vpi = LPFC_MAX_VPI;
                if (mvpi)
                        *mvpi = max_vpi;
                if (avpi)
                        *avpi = max_vpi - phba->sli4_hba.max_cfg_param.vpi_used;
        } else {
                if (mrpi)
                        *mrpi = pmb->un.varRdConfig.max_rpi;
                if (arpi)
                        *arpi = pmb->un.varRdConfig.avail_rpi;
                if (mxri)
                        *mxri = pmb->un.varRdConfig.max_xri;
                if (axri)
                        *axri = pmb->un.varRdConfig.avail_xri;
                if (mvpi)
                        *mvpi = pmb->un.varRdConfig.max_vpi;
                if (avpi) {
                        /* avail_vpi is only valid if link is up and ready */
                        if (phba->link_state == LPFC_HBA_READY)
                                *avpi = pmb->un.varRdConfig.avail_vpi;
                        else
                                *avpi = pmb->un.varRdConfig.max_vpi;
                }
        }

        mempool_free(pmboxq, phba->mbox_mem_pool);
        return 1;
}

/**
 * lpfc_max_rpi_show - Return maximum rpi
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the maximum rpi count in decimal or "Unknown".
 *
 * Description:
 * Calls lpfc_get_hba_info() asking for just the mrpi count.
 * If lpfc_get_hba_info() returns zero (failure) the buffer text is set
 * to "Unknown" and the buffer length is returned, therefore the caller
 * must check for "Unknown" in the buffer to detect a failure.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_max_rpi_show(struct device *dev, struct device_attribute *attr,
                  char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        uint32_t cnt;

        if (lpfc_get_hba_info(phba, NULL, NULL, &cnt, NULL, NULL, NULL))
                return scnprintf(buf, PAGE_SIZE, "%d\n", cnt);
        return scnprintf(buf, PAGE_SIZE, "Unknown\n");
}

/**
 * lpfc_used_rpi_show - Return maximum rpi minus available rpi
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing the used rpi count in decimal or "Unknown".
 *
 * Description:
 * Calls lpfc_get_hba_info() asking for just the mrpi and arpi counts.
 * If lpfc_get_hba_info() returns zero (failure) the buffer text is set
 * to "Unknown" and the buffer length is returned, therefore the caller
 * must check for "Unknown" in the buffer to detect a failure.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_used_rpi_show(struct device *dev, struct device_attribute *attr,
                   char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        uint32_t cnt, acnt;

        if (lpfc_get_hba_info(phba, NULL, NULL, &cnt, &acnt, NULL, NULL))
                return scnprintf(buf, PAGE_SIZE, "%d\n", (cnt - acnt));
        return scnprintf(buf, PAGE_SIZE, "Unknown\n");
}

/**
 * lpfc_max_xri_show - Return maximum xri
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the maximum xri count in decimal or "Unknown".
 *
 * Description:
 * Calls lpfc_get_hba_info() asking for just the mrpi count.
 * If lpfc_get_hba_info() returns zero (failure) the buffer text is set
 * to "Unknown" and the buffer length is returned, therefore the caller
 * must check for "Unknown" in the buffer to detect a failure.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_max_xri_show(struct device *dev, struct device_attribute *attr,
                  char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        uint32_t cnt;