WIP FPC-III support

[linux/fpc-iii.git] / drivers / scsi / lpfc / lpfc_attr.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2017-2020 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_err),
                  atomic_read(&lport->xmt_fcp_wqerr));
        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 -
                        strnlen(LPFC_NVME_INFO_MORE_STR, PAGE_SIZE - 1),
                        LPFC_NVME_INFO_MORE_STR,
                        strnlen(LPFC_NVME_INFO_MORE_STR, PAGE_SIZE - 1)
                        + 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_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 %s %s\n",
                                        "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);
        if (rc != MBX_TIMEOUT)
                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, "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;

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

/**
 * lpfc_used_xri_show - Return maximum xpi minus the available xpi
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the used xri count in decimal or "Unknown".
 *
 * Description:
 * Calls lpfc_get_hba_info() asking for just the mxri and axri 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_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, acnt;

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

/**
 * lpfc_max_vpi_show - Return maximum vpi
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the maximum vpi count in decimal or "Unknown".
 *
 * Description:
 * Calls lpfc_get_hba_info() asking for just the mvpi 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_vpi_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, NULL, NULL, &cnt, NULL))
                return scnprintf(buf, PAGE_SIZE, "%d\n", cnt);
        return scnprintf(buf, PAGE_SIZE, "Unknown\n");
}

/**
 * lpfc_used_vpi_show - Return maximum vpi minus the available vpi
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the used vpi count in decimal or "Unknown".
 *
 * Description:
 * Calls lpfc_get_hba_info() asking for just the mvpi and avpi 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_vpi_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, NULL, NULL, &cnt, &acnt))
                return scnprintf(buf, PAGE_SIZE, "%d\n", (cnt - acnt));
        return scnprintf(buf, PAGE_SIZE, "Unknown\n");
}

/**
 * lpfc_npiv_info_show - Return text about NPIV support for the adapter
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: text that must be interpreted to determine if npiv is supported.
 *
 * Description:
 * Buffer will contain text indicating npiv is not suppoerted on the port,
 * the port is an NPIV physical port, or it is an npiv virtual port with
 * the id of the vport.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_npiv_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->max_vpi))
                return scnprintf(buf, PAGE_SIZE, "NPIV Not Supported\n");
        if (vport->port_type == LPFC_PHYSICAL_PORT)
                return scnprintf(buf, PAGE_SIZE, "NPIV Physical\n");
        return scnprintf(buf, PAGE_SIZE, "NPIV Virtual (VPI %d)\n", vport->vpi);
}

/**
 * lpfc_poll_show - Return text about poll support for the adapter
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the cfg_poll in hex.
 *
 * Notes:
 * cfg_poll should be a lpfc_polling_flags type.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_poll_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, "%#x\n", phba->cfg_poll);
}

/**
 * lpfc_poll_store - Set the value of cfg_poll for the adapter
 * @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.
 *
 * Notes:
 * buf contents converted to integer and checked for a valid value.
 *
 * Returns:
 * -EINVAL if the buffer connot be converted or is out of range
 * length of the buf on success
 **/
static ssize_t
lpfc_poll_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;
        uint32_t creg_val;
        uint32_t old_val;
        int val=0;

        if (!isdigit(buf[0]))
                return -EINVAL;

        if (sscanf(buf, "%i", &val) != 1)
                return -EINVAL;

        if ((val & 0x3) != val)
                return -EINVAL;

        if (phba->sli_rev == LPFC_SLI_REV4)
                val = 0;

        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                "3051 lpfc_poll changed from %d to %d\n",
                phba->cfg_poll, val);

        spin_lock_irq(&phba->hbalock);

        old_val = phba->cfg_poll;

        if (val & ENABLE_FCP_RING_POLLING) {
                if ((val & DISABLE_FCP_RING_INT) &&
                    !(old_val & DISABLE_FCP_RING_INT)) {
                        if (lpfc_readl(phba->HCregaddr, &creg_val)) {
                                spin_unlock_irq(&phba->hbalock);
                                return -EINVAL;
                        }
                        creg_val &= ~(HC_R0INT_ENA << LPFC_FCP_RING);
                        writel(creg_val, phba->HCregaddr);
                        readl(phba->HCregaddr); /* flush */

                        lpfc_poll_start_timer(phba);
                }
        } else if (val != 0x0) {
                spin_unlock_irq(&phba->hbalock);
                return -EINVAL;
        }

        if (!(val & DISABLE_FCP_RING_INT) &&
            (old_val & DISABLE_FCP_RING_INT))
        {
                spin_unlock_irq(&phba->hbalock);
                del_timer(&phba->fcp_poll_timer);
                spin_lock_irq(&phba->hbalock);
                if (lpfc_readl(phba->HCregaddr, &creg_val)) {
                        spin_unlock_irq(&phba->hbalock);
                        return -EINVAL;
                }
                creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
                writel(creg_val, phba->HCregaddr);
                readl(phba->HCregaddr); /* flush */
        }

        phba->cfg_poll = val;

        spin_unlock_irq(&phba->hbalock);

        return strlen(buf);
}

/**
 * lpfc_sriov_hw_max_virtfn_show - Return maximum number of virtual functions
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the formatted support level.
 *
 * Description:
 * Returns the maximum number of virtual functions a physical function can
 * support, 0 will be returned if called on virtual function.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_sriov_hw_max_virtfn_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;
        uint16_t max_nr_virtfn;

        max_nr_virtfn = lpfc_sli_sriov_nr_virtfn_get(phba);
        return scnprintf(buf, PAGE_SIZE, "%d\n", max_nr_virtfn);
}

static inline bool lpfc_rangecheck(uint val, uint min, uint max)
{
        return val >= min && val <= max;
}

/**
 * lpfc_enable_bbcr_set: Sets an attribute value.
 * @phba: pointer the the adapter structure.
 * @val: integer attribute value.
 *
 * Description:
 * Validates the min and max values then sets the
 * adapter config field if in the valid range. prints error message
 * and does not set the parameter if invalid.
 *
 * Returns:
 * zero on success
 * -EINVAL if val is invalid
 */
static ssize_t
lpfc_enable_bbcr_set(struct lpfc_hba *phba, uint val)
{
        if (lpfc_rangecheck(val, 0, 1) && phba->sli_rev == LPFC_SLI_REV4) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "3068 %s_enable_bbcr changed from %d to %d\n",
                                LPFC_DRIVER_NAME, phba->cfg_enable_bbcr, val);
                phba->cfg_enable_bbcr = val;
                return 0;
        }
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0451 %s_enable_bbcr cannot set to %d, range is 0, 1\n",
                        LPFC_DRIVER_NAME, val);
        return -EINVAL;
}

/*
 * lpfc_param_show - Return a cfg attribute value in decimal
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_show.
 *
 * lpfc_##attr##_show: Return the decimal value of an adapters cfg_xxx field.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the attribute value in decimal.
 *
 * Returns: size of formatted string.
 **/
#define lpfc_param_show(attr)   \
static ssize_t \
lpfc_##attr##_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->cfg_##attr);\
}

/*
 * lpfc_param_hex_show - Return a cfg attribute value in hex
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_show
 *
 * lpfc_##attr##_show: Return the hex value of an adapters cfg_xxx field.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the attribute value in hexadecimal.
 *
 * Returns: size of formatted string.
 **/
#define lpfc_param_hex_show(attr)       \
static ssize_t \
lpfc_##attr##_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;\
        uint val = 0;\
        val = phba->cfg_##attr;\
        return scnprintf(buf, PAGE_SIZE, "%#x\n",\
                        phba->cfg_##attr);\
}

/*
 * lpfc_param_init - Initializes a cfg attribute
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_init. The macro also
 * takes a default argument, a minimum and maximum argument.
 *
 * lpfc_##attr##_init: Initializes an attribute.
 * @phba: pointer the the adapter structure.
 * @val: integer attribute value.
 *
 * Validates the min and max values then sets the adapter config field
 * accordingly, or uses the default if out of range and prints an error message.
 *
 * Returns:
 * zero on success
 * -EINVAL if default used
 **/
#define lpfc_param_init(attr, default, minval, maxval)  \
static int \
lpfc_##attr##_init(struct lpfc_hba *phba, uint val) \
{ \
        if (lpfc_rangecheck(val, minval, maxval)) {\
                phba->cfg_##attr = val;\
                return 0;\
        }\
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT, \
                        "0449 lpfc_"#attr" attribute cannot be set to %d, "\
                        "allowed range is ["#minval", "#maxval"]\n", val); \
        phba->cfg_##attr = default;\
        return -EINVAL;\
}

/*
 * lpfc_param_set - Set a cfg attribute value
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_set
 *
 * lpfc_##attr##_set: Sets an attribute value.
 * @phba: pointer the the adapter structure.
 * @val: integer attribute value.
 *
 * Description:
 * Validates the min and max values then sets the
 * adapter config field if in the valid range. prints error message
 * and does not set the parameter if invalid.
 *
 * Returns:
 * zero on success
 * -EINVAL if val is invalid
 **/
#define lpfc_param_set(attr, default, minval, maxval)   \
static int \
lpfc_##attr##_set(struct lpfc_hba *phba, uint val) \
{ \
        if (lpfc_rangecheck(val, minval, maxval)) {\
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT, \
                        "3052 lpfc_" #attr " changed from %d to %d\n", \
                        phba->cfg_##attr, val); \
                phba->cfg_##attr = val;\
                return 0;\
        }\
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT, \
                        "0450 lpfc_"#attr" attribute cannot be set to %d, "\
                        "allowed range is ["#minval", "#maxval"]\n", val); \
        return -EINVAL;\
}

/*
 * lpfc_param_store - Set a vport attribute value
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_store.
 *
 * lpfc_##attr##_store: Set an sttribute value.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: contains the attribute value in ascii.
 * @count: not used.
 *
 * Description:
 * Convert the ascii text number to an integer, then
 * use the lpfc_##attr##_set function to set the value.
 *
 * Returns:
 * -EINVAL if val is invalid or lpfc_##attr##_set() fails
 * length of buffer upon success.
 **/
#define lpfc_param_store(attr)  \
static ssize_t \
lpfc_##attr##_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;\
        uint val = 0;\
        if (!isdigit(buf[0]))\
                return -EINVAL;\
        if (sscanf(buf, "%i", &val) != 1)\
                return -EINVAL;\
        if (lpfc_##attr##_set(phba, val) == 0) \
                return strlen(buf);\
        else \
                return -EINVAL;\
}

/*
 * lpfc_vport_param_show - Return decimal formatted cfg attribute value
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_show
 *
 * lpfc_##attr##_show: prints the attribute value in decimal.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the attribute value in decimal.
 *
 * Returns: length of formatted string.
 **/
#define lpfc_vport_param_show(attr)     \
static ssize_t \
lpfc_##attr##_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->cfg_##attr);\
}

/*
 * lpfc_vport_param_hex_show - Return hex formatted attribute value
 *
 * Description:
 * Macro that given an attr e.g.
 * hba_queue_depth expands into a function with the name
 * lpfc_hba_queue_depth_show
 *
 * lpfc_##attr##_show: prints the attribute value in hexadecimal.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the attribute value in hexadecimal.
 *
 * Returns: length of formatted string.
 **/
#define lpfc_vport_param_hex_show(attr) \
static ssize_t \
lpfc_##attr##_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, "%#x\n", vport->cfg_##attr);\
}

/*
 * lpfc_vport_param_init - Initialize a vport cfg attribute
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_init. The macro also
 * takes a default argument, a minimum and maximum argument.
 *
 * lpfc_##attr##_init: validates the min and max values then sets the
 * adapter config field accordingly, or uses the default if out of range
 * and prints an error message.
 * @phba: pointer the the adapter structure.
 * @val: integer attribute value.
 *
 * Returns:
 * zero on success
 * -EINVAL if default used
 **/
#define lpfc_vport_param_init(attr, default, minval, maxval)    \
static int \
lpfc_##attr##_init(struct lpfc_vport *vport, uint val) \
{ \
        if (lpfc_rangecheck(val, minval, maxval)) {\
                vport->cfg_##attr = val;\
                return 0;\
        }\
        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, \
                         "0423 lpfc_"#attr" attribute cannot be set to %d, "\
                         "allowed range is ["#minval", "#maxval"]\n", val); \
        vport->cfg_##attr = default;\
        return -EINVAL;\
}

/*
 * lpfc_vport_param_set - Set a vport cfg attribute
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth expands
 * into a function with the name lpfc_hba_queue_depth_set
 *
 * lpfc_##attr##_set: validates the min and max values then sets the
 * adapter config field if in the valid range. prints error message
 * and does not set the parameter if invalid.
 * @phba: pointer the the adapter structure.
 * @val:        integer attribute value.
 *
 * Returns:
 * zero on success
 * -EINVAL if val is invalid
 **/
#define lpfc_vport_param_set(attr, default, minval, maxval)     \
static int \
lpfc_##attr##_set(struct lpfc_vport *vport, uint val) \
{ \
        if (lpfc_rangecheck(val, minval, maxval)) {\
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, \
                        "3053 lpfc_" #attr \
                        " changed from %d (x%x) to %d (x%x)\n", \
                        vport->cfg_##attr, vport->cfg_##attr, \
                        val, val); \
                vport->cfg_##attr = val;\
                return 0;\
        }\
        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT, \
                         "0424 lpfc_"#attr" attribute cannot be set to %d, "\
                         "allowed range is ["#minval", "#maxval"]\n", val); \
        return -EINVAL;\
}

/*
 * lpfc_vport_param_store - Set a vport attribute
 *
 * Description:
 * Macro that given an attr e.g. hba_queue_depth
 * expands into a function with the name lpfc_hba_queue_depth_store
 *
 * lpfc_##attr##_store: convert the ascii text number to an integer, then
 * use the lpfc_##attr##_set function to set the value.
 * @cdev: class device that is converted into a Scsi_host.
 * @buf:        contains the attribute value in decimal.
 * @count: not used.
 *
 * Returns:
 * -EINVAL if val is invalid or lpfc_##attr##_set() fails
 * length of buffer upon success.
 **/
#define lpfc_vport_param_store(attr)    \
static ssize_t \
lpfc_##attr##_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;\
        uint val = 0;\
        if (!isdigit(buf[0]))\
                return -EINVAL;\
        if (sscanf(buf, "%i", &val) != 1)\
                return -EINVAL;\
        if (lpfc_##attr##_set(vport, val) == 0) \
                return strlen(buf);\
        else \
                return -EINVAL;\
}


static DEVICE_ATTR(nvme_info, 0444, lpfc_nvme_info_show, NULL);
static DEVICE_ATTR(scsi_stat, 0444, lpfc_scsi_stat_show, NULL);
static DEVICE_ATTR(bg_info, S_IRUGO, lpfc_bg_info_show, NULL);
static DEVICE_ATTR(bg_guard_err, S_IRUGO, lpfc_bg_guard_err_show, NULL);
static DEVICE_ATTR(bg_apptag_err, S_IRUGO, lpfc_bg_apptag_err_show, NULL);
static DEVICE_ATTR(bg_reftag_err, S_IRUGO, lpfc_bg_reftag_err_show, NULL);
static DEVICE_ATTR(info, S_IRUGO, lpfc_info_show, NULL);
static DEVICE_ATTR(serialnum, S_IRUGO, lpfc_serialnum_show, NULL);
static DEVICE_ATTR(modeldesc, S_IRUGO, lpfc_modeldesc_show, NULL);
static DEVICE_ATTR(modelname, S_IRUGO, lpfc_modelname_show, NULL);
static DEVICE_ATTR(programtype, S_IRUGO, lpfc_programtype_show, NULL);
static DEVICE_ATTR(portnum, S_IRUGO, lpfc_vportnum_show, NULL);
static DEVICE_ATTR(fwrev, S_IRUGO, lpfc_fwrev_show, NULL);
static DEVICE_ATTR(hdw, S_IRUGO, lpfc_hdw_show, NULL);
static DEVICE_ATTR(link_state, S_IRUGO | S_IWUSR, lpfc_link_state_show,
                lpfc_link_state_store);
static DEVICE_ATTR(option_rom_version, S_IRUGO,
                   lpfc_option_rom_version_show, NULL);
static DEVICE_ATTR(num_discovered_ports, S_IRUGO,
                   lpfc_num_discovered_ports_show, NULL);
static DEVICE_ATTR(menlo_mgmt_mode, S_IRUGO, lpfc_mlomgmt_show, NULL);
static DEVICE_ATTR(nport_evt_cnt, S_IRUGO, lpfc_nport_evt_cnt_show, NULL);
static DEVICE_ATTR_RO(lpfc_drvr_version);
static DEVICE_ATTR_RO(lpfc_enable_fip);
static DEVICE_ATTR(board_mode, S_IRUGO | S_IWUSR,
                   lpfc_board_mode_show, lpfc_board_mode_store);
static DEVICE_ATTR(issue_reset, S_IWUSR, NULL, lpfc_issue_reset);
static DEVICE_ATTR(max_vpi, S_IRUGO, lpfc_max_vpi_show, NULL);
static DEVICE_ATTR(used_vpi, S_IRUGO, lpfc_used_vpi_show, NULL);
static DEVICE_ATTR(max_rpi, S_IRUGO, lpfc_max_rpi_show, NULL);
static DEVICE_ATTR(used_rpi, S_IRUGO, lpfc_used_rpi_show, NULL);
static DEVICE_ATTR(max_xri, S_IRUGO, lpfc_max_xri_show, NULL);
static DEVICE_ATTR(used_xri, S_IRUGO, lpfc_used_xri_show, NULL);
static DEVICE_ATTR(npiv_info, S_IRUGO, lpfc_npiv_info_show, NULL);
static DEVICE_ATTR_RO(lpfc_temp_sensor);
static DEVICE_ATTR_RO(lpfc_sriov_hw_max_virtfn);
static DEVICE_ATTR(protocol, S_IRUGO, lpfc_sli4_protocol_show, NULL);
static DEVICE_ATTR(lpfc_xlane_supported, S_IRUGO, lpfc_oas_supported_show,
                   NULL);

static char *lpfc_soft_wwn_key = "C99G71SL8032A";
#define WWN_SZ 8
/**
 * lpfc_wwn_set - Convert string to the 8 byte WWN value.
 * @buf: WWN string.
 * @cnt: Length of string.
 * @wwn: Array to receive converted wwn value.
 *
 * Returns:
 * -EINVAL if the buffer does not contain a valid wwn
 * 0 success
 **/
static size_t
lpfc_wwn_set(const char *buf, size_t cnt, char wwn[])
{
        unsigned int i, j;

        /* Count may include a LF at end of string */
        if (buf[cnt-1] == '\n')
                cnt--;

        if ((cnt < 16) || (cnt > 18) || ((cnt == 17) && (*buf++ != 'x')) ||
            ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
                return -EINVAL;

        memset(wwn, 0, WWN_SZ);

        /* Validate and store the new name */
        for (i = 0, j = 0; i < 16; i++) {
                if ((*buf >= 'a') && (*buf <= 'f'))
                        j = ((j << 4) | ((*buf++ - 'a') + 10));
                else if ((*buf >= 'A') && (*buf <= 'F'))
                        j = ((j << 4) | ((*buf++ - 'A') + 10));
                else if ((*buf >= '0') && (*buf <= '9'))
                        j = ((j << 4) | (*buf++ - '0'));
                else
                        return -EINVAL;
                if (i % 2) {
                        wwn[i/2] = j & 0xff;
                        j = 0;
                }
        }
        return 0;
}
/**
 * lpfc_soft_wwn_enable_store - Allows setting of the wwn if the key is valid
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing the string lpfc_soft_wwn_key.
 * @count: must be size of lpfc_soft_wwn_key.
 *
 * Returns:
 * -EINVAL if the buffer does not contain lpfc_soft_wwn_key
 * length of buf indicates success
 **/
static ssize_t
lpfc_soft_wwn_enable_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;
        unsigned int cnt = count;
        uint8_t vvvl = vport->fc_sparam.cmn.valid_vendor_ver_level;
        u32 *fawwpn_key = (uint32_t *)&vport->fc_sparam.un.vendorVersion[0];

        /*
         * We're doing a simple sanity check for soft_wwpn setting.
         * We require that the user write a specific key to enable
         * the soft_wwpn attribute to be settable. Once the attribute
         * is written, the enable key resets. If further updates are
         * desired, the key must be written again to re-enable the
         * attribute.
         *
         * The "key" is not secret - it is a hardcoded string shown
         * here. The intent is to protect against the random user or
         * application that is just writing attributes.
         */
        if (vvvl == 1 && cpu_to_be32(*fawwpn_key) == FAPWWN_KEY_VENDOR) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                 "0051 "LPFC_DRIVER_NAME" soft wwpn can not"
                                 " be enabled: fawwpn is enabled\n");
                return -EINVAL;
        }

        /* count may include a LF at end of string */
        if (buf[cnt-1] == '\n')
                cnt--;

        if ((cnt != strlen(lpfc_soft_wwn_key)) ||
            (strncmp(buf, lpfc_soft_wwn_key, strlen(lpfc_soft_wwn_key)) != 0))
                return -EINVAL;

        phba->soft_wwn_enable = 1;

        dev_printk(KERN_WARNING, &phba->pcidev->dev,
                   "lpfc%d: soft_wwpn assignment has been enabled.\n",
                   phba->brd_no);
        dev_printk(KERN_WARNING, &phba->pcidev->dev,
                   "  The soft_wwpn feature is not supported by Broadcom.");

        return count;
}
static DEVICE_ATTR_WO(lpfc_soft_wwn_enable);

/**
 * lpfc_soft_wwpn_show - Return the cfg soft ww port name of the adapter
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the wwpn in hexadecimal.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_soft_wwpn_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, "0x%llx\n",
                        (unsigned long long)phba->cfg_soft_wwpn);
}

/**
 * lpfc_soft_wwpn_store - Set the ww port name of the adapter
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: contains the wwpn in hexadecimal.
 * @count: number of wwpn bytes in buf
 *
 * Returns:
 * -EACCES hba reset not enabled, adapter over temp
 * -EINVAL soft wwn not enabled, count is invalid, invalid wwpn byte invalid
 * -EIO error taking adapter offline or online
 * value of count on success
 **/
static ssize_t
lpfc_soft_wwpn_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;
        int stat1 = 0, stat2 = 0;
        unsigned int cnt = count;
        u8 wwpn[WWN_SZ];
        int rc;

        if (!phba->cfg_enable_hba_reset)
                return -EACCES;
        spin_lock_irq(&phba->hbalock);
        if (phba->over_temp_state == HBA_OVER_TEMP) {
                spin_unlock_irq(&phba->hbalock);
                return -EACCES;
        }
        spin_unlock_irq(&phba->hbalock);
        /* count may include a LF at end of string */
        if (buf[cnt-1] == '\n')
                cnt--;

        if (!phba->soft_wwn_enable)
                return -EINVAL;

        /* lock setting wwpn, wwnn down */
        phba->soft_wwn_enable = 0;

        rc = lpfc_wwn_set(buf, cnt, wwpn);
        if (rc) {
                /* not able to set wwpn, unlock it */
                phba->soft_wwn_enable = 1;
                return rc;
        }

        phba->cfg_soft_wwpn = wwn_to_u64(wwpn);
        fc_host_port_name(shost) = phba->cfg_soft_wwpn;
        if (phba->cfg_soft_wwnn)
                fc_host_node_name(shost) = phba->cfg_soft_wwnn;

        dev_printk(KERN_NOTICE, &phba->pcidev->dev,
                   "lpfc%d: Reinitializing to use soft_wwpn\n", phba->brd_no);

        stat1 = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);
        if (stat1)
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0463 lpfc_soft_wwpn attribute set failed to "
                                "reinit adapter - %d\n", stat1);
        init_completion(&online_compl);
        rc = lpfc_workq_post_event(phba, &stat2, &online_compl,
                                   LPFC_EVT_ONLINE);
        if (rc == 0)
                return -ENOMEM;

        wait_for_completion(&online_compl);
        if (stat2)
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0464 lpfc_soft_wwpn attribute set failed to "
                                "reinit adapter - %d\n", stat2);
        return (stat1 || stat2) ? -EIO : count;
}
static DEVICE_ATTR_RW(lpfc_soft_wwpn);

/**
 * lpfc_soft_wwnn_show - Return the cfg soft ww node name for the adapter
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the wwnn in hexadecimal.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_soft_wwnn_show(struct device *dev, struct device_attribute *attr,
                    char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        return scnprintf(buf, PAGE_SIZE, "0x%llx\n",
                        (unsigned long long)phba->cfg_soft_wwnn);
}

/**
 * lpfc_soft_wwnn_store - sets the ww node name of the adapter
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: contains the ww node name in hexadecimal.
 * @count: number of wwnn bytes in buf.
 *
 * Returns:
 * -EINVAL soft wwn not enabled, count is invalid, invalid wwnn byte invalid
 * value of count on success
 **/
static ssize_t
lpfc_soft_wwnn_store(struct device *dev, struct device_attribute *attr,
                     const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        unsigned int cnt = count;
        u8 wwnn[WWN_SZ];
        int rc;

        /* count may include a LF at end of string */
        if (buf[cnt-1] == '\n')
                cnt--;

        if (!phba->soft_wwn_enable)
                return -EINVAL;

        rc = lpfc_wwn_set(buf, cnt, wwnn);
        if (rc) {
                /* Allow wwnn to be set many times, as long as the enable
                 * is set. However, once the wwpn is set, everything locks.
                 */
                return rc;
        }

        phba->cfg_soft_wwnn = wwn_to_u64(wwnn);

        dev_printk(KERN_NOTICE, &phba->pcidev->dev,
                   "lpfc%d: soft_wwnn set. Value will take effect upon "
                   "setting of the soft_wwpn\n", phba->brd_no);

        return count;
}
static DEVICE_ATTR_RW(lpfc_soft_wwnn);

/**
 * lpfc_oas_tgt_show - Return wwpn of target whose luns maybe enabled for
 *                    Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 *
 * Returns:
 * value of count
 **/
static ssize_t
lpfc_oas_tgt_show(struct device *dev, struct device_attribute *attr,
                  char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        return scnprintf(buf, PAGE_SIZE, "0x%llx\n",
                        wwn_to_u64(phba->cfg_oas_tgt_wwpn));
}

/**
 * lpfc_oas_tgt_store - Store wwpn of target whose luns maybe enabled for
 *                    Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 * @count: Size of the data buffer.
 *
 * Returns:
 * -EINVAL count is invalid, invalid wwpn byte invalid
 * -EPERM oas is not supported by hba
 * value of count on success
 **/
static ssize_t
lpfc_oas_tgt_store(struct device *dev, struct device_attribute *attr,
                   const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        unsigned int cnt = count;
        uint8_t wwpn[WWN_SZ];
        int rc;

        if (!phba->cfg_fof)
                return -EPERM;

        /* count may include a LF at end of string */
        if (buf[cnt-1] == '\n')
                cnt--;

        rc = lpfc_wwn_set(buf, cnt, wwpn);
        if (rc)
                return rc;

        memcpy(phba->cfg_oas_tgt_wwpn, wwpn, (8 * sizeof(uint8_t)));
        memcpy(phba->sli4_hba.oas_next_tgt_wwpn, wwpn, (8 * sizeof(uint8_t)));
        if (wwn_to_u64(wwpn) == 0)
                phba->cfg_oas_flags |= OAS_FIND_ANY_TARGET;
        else
                phba->cfg_oas_flags &= ~OAS_FIND_ANY_TARGET;
        phba->cfg_oas_flags &= ~OAS_LUN_VALID;
        phba->sli4_hba.oas_next_lun = FIND_FIRST_OAS_LUN;
        return count;
}
static DEVICE_ATTR(lpfc_xlane_tgt, S_IRUGO | S_IWUSR,
                   lpfc_oas_tgt_show, lpfc_oas_tgt_store);

/**
 * lpfc_oas_priority_show - Return wwpn of target whose luns maybe enabled for
 *                    Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 *
 * Returns:
 * value of count
 **/
static ssize_t
lpfc_oas_priority_show(struct device *dev, struct device_attribute *attr,
                       char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

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

/**
 * lpfc_oas_priority_store - Store wwpn of target whose luns maybe enabled for
 *                    Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 * @count: Size of the data buffer.
 *
 * Returns:
 * -EINVAL count is invalid, invalid wwpn byte invalid
 * -EPERM oas is not supported by hba
 * value of count on success
 **/
static ssize_t
lpfc_oas_priority_store(struct device *dev, struct device_attribute *attr,
                        const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        unsigned int cnt = count;
        unsigned long val;
        int ret;

        if (!phba->cfg_fof)
                return -EPERM;

        /* count may include a LF at end of string */
        if (buf[cnt-1] == '\n')
                cnt--;

        ret = kstrtoul(buf, 0, &val);
        if (ret || (val > 0x7f))
                return -EINVAL;

        if (val)
                phba->cfg_oas_priority = (uint8_t)val;
        else
                phba->cfg_oas_priority = phba->cfg_XLanePriority;
        return count;
}
static DEVICE_ATTR(lpfc_xlane_priority, S_IRUGO | S_IWUSR,
                   lpfc_oas_priority_show, lpfc_oas_priority_store);

/**
 * lpfc_oas_vpt_show - Return wwpn of vport whose targets maybe enabled
 *                    for Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 *
 * Returns:
 * value of count on success
 **/
static ssize_t
lpfc_oas_vpt_show(struct device *dev, struct device_attribute *attr,
                  char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        return scnprintf(buf, PAGE_SIZE, "0x%llx\n",
                        wwn_to_u64(phba->cfg_oas_vpt_wwpn));
}

/**
 * lpfc_oas_vpt_store - Store wwpn of vport whose targets maybe enabled
 *                    for Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 * @count: Size of the data buffer.
 *
 * Returns:
 * -EINVAL count is invalid, invalid wwpn byte invalid
 * -EPERM oas is not supported by hba
 * value of count on success
 **/
static ssize_t
lpfc_oas_vpt_store(struct device *dev, struct device_attribute *attr,
                   const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        unsigned int cnt = count;
        uint8_t wwpn[WWN_SZ];
        int rc;

        if (!phba->cfg_fof)
                return -EPERM;

        /* count may include a LF at end of string */
        if (buf[cnt-1] == '\n')
                cnt--;

        rc = lpfc_wwn_set(buf, cnt, wwpn);
        if (rc)
                return rc;

        memcpy(phba->cfg_oas_vpt_wwpn, wwpn, (8 * sizeof(uint8_t)));
        memcpy(phba->sli4_hba.oas_next_vpt_wwpn, wwpn, (8 * sizeof(uint8_t)));
        if (wwn_to_u64(wwpn) == 0)
                phba->cfg_oas_flags |= OAS_FIND_ANY_VPORT;
        else
                phba->cfg_oas_flags &= ~OAS_FIND_ANY_VPORT;
        phba->cfg_oas_flags &= ~OAS_LUN_VALID;
        if (phba->cfg_oas_priority == 0)
                phba->cfg_oas_priority = phba->cfg_XLanePriority;
        phba->sli4_hba.oas_next_lun = FIND_FIRST_OAS_LUN;
        return count;
}
static DEVICE_ATTR(lpfc_xlane_vpt, S_IRUGO | S_IWUSR,
                   lpfc_oas_vpt_show, lpfc_oas_vpt_store);

/**
 * lpfc_oas_lun_state_show - Return the current state (enabled or disabled)
 *                          of whether luns will be enabled or disabled
 *                          for Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 *
 * Returns:
 * size of formatted string.
 **/
static ssize_t
lpfc_oas_lun_state_show(struct device *dev, struct device_attribute *attr,
                        char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

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

/**
 * lpfc_oas_lun_state_store - Store the state (enabled or disabled)
 *                          of whether luns will be enabled or disabled
 *                          for Optimized Access Storage (OAS) operations.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 * @count: Size of the data buffer.
 *
 * Returns:
 * -EINVAL count is invalid, invalid wwpn byte invalid
 * -EPERM oas is not supported by hba
 * value of count on success
 **/
static ssize_t
lpfc_oas_lun_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_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        int val = 0;

        if (!phba->cfg_fof)
                return -EPERM;

        if (!isdigit(buf[0]))
                return -EINVAL;

        if (sscanf(buf, "%i", &val) != 1)
                return -EINVAL;

        if ((val != 0) && (val != 1))
                return -EINVAL;

        phba->cfg_oas_lun_state = val;
        return strlen(buf);
}
static DEVICE_ATTR(lpfc_xlane_lun_state, S_IRUGO | S_IWUSR,
                   lpfc_oas_lun_state_show, lpfc_oas_lun_state_store);

/**
 * lpfc_oas_lun_status_show - Return the status of the Optimized Access
 *                          Storage (OAS) lun returned by the
 *                          lpfc_oas_lun_show function.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 *
 * Returns:
 * size of formatted string.
 **/
static ssize_t
lpfc_oas_lun_status_show(struct device *dev, struct device_attribute *attr,
                         char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        if (!(phba->cfg_oas_flags & OAS_LUN_VALID))
                return -EFAULT;

        return scnprintf(buf, PAGE_SIZE, "%d\n", phba->cfg_oas_lun_status);
}
static DEVICE_ATTR(lpfc_xlane_lun_status, S_IRUGO,
                   lpfc_oas_lun_status_show, NULL);


/**
 * lpfc_oas_lun_state_set - enable or disable a lun for Optimized Access Storage
 *                         (OAS) operations.
 * @phba: lpfc_hba pointer.
 * @vpt_wwpn: wwpn of the vport associated with the returned lun
 * @tgt_wwpn: wwpn of the target associated with the returned lun
 * @lun: the fc lun for setting oas state.
 * @oas_state: the oas state to be set to the lun.
 * @pri: priority
 *
 * Returns:
 * SUCCESS : 0
 * -EPERM OAS is not enabled or not supported by this port.
 *
 */
static size_t
lpfc_oas_lun_state_set(struct lpfc_hba *phba, uint8_t vpt_wwpn[],
                       uint8_t tgt_wwpn[], uint64_t lun,
                       uint32_t oas_state, uint8_t pri)
{

        int rc = 0;

        if (!phba->cfg_fof)
                return -EPERM;

        if (oas_state) {
                if (!lpfc_enable_oas_lun(phba, (struct lpfc_name *)vpt_wwpn,
                                         (struct lpfc_name *)tgt_wwpn,
                                         lun, pri))
                        rc = -ENOMEM;
        } else {
                lpfc_disable_oas_lun(phba, (struct lpfc_name *)vpt_wwpn,
                                     (struct lpfc_name *)tgt_wwpn, lun, pri);
        }
        return rc;

}

/**
 * lpfc_oas_lun_get_next - get the next lun that has been enabled for Optimized
 *                        Access Storage (OAS) operations.
 * @phba: lpfc_hba pointer.
 * @vpt_wwpn: wwpn of the vport associated with the returned lun
 * @tgt_wwpn: wwpn of the target associated with the returned lun
 * @lun_status: status of the lun returned lun
 * @lun_pri: priority of the lun returned lun
 *
 * Returns the first or next lun enabled for OAS operations for the vport/target
 * specified.  If a lun is found, its vport wwpn, target wwpn and status is
 * returned.  If the lun is not found, NOT_OAS_ENABLED_LUN is returned.
 *
 * Return:
 * lun that is OAS enabled for the vport/target
 * NOT_OAS_ENABLED_LUN when no oas enabled lun found.
 */
static uint64_t
lpfc_oas_lun_get_next(struct lpfc_hba *phba, uint8_t vpt_wwpn[],
                      uint8_t tgt_wwpn[], uint32_t *lun_status,
                      uint32_t *lun_pri)
{
        uint64_t found_lun;

        if (unlikely(!phba) || !vpt_wwpn || !tgt_wwpn)
                return NOT_OAS_ENABLED_LUN;
        if (lpfc_find_next_oas_lun(phba, (struct lpfc_name *)
                                   phba->sli4_hba.oas_next_vpt_wwpn,
                                   (struct lpfc_name *)
                                   phba->sli4_hba.oas_next_tgt_wwpn,
                                   &phba->sli4_hba.oas_next_lun,
                                   (struct lpfc_name *)vpt_wwpn,
                                   (struct lpfc_name *)tgt_wwpn,
                                   &found_lun, lun_status, lun_pri))
                return found_lun;
        else
                return NOT_OAS_ENABLED_LUN;
}

/**
 * lpfc_oas_lun_state_change - enable/disable a lun for OAS operations
 * @phba: lpfc_hba pointer.
 * @vpt_wwpn: vport wwpn by reference.
 * @tgt_wwpn: target wwpn by reference.
 * @lun: the fc lun for setting oas state.
 * @oas_state: the oas state to be set to the oas_lun.
 * @pri: priority
 *
 * This routine enables (OAS_LUN_ENABLE) or disables (OAS_LUN_DISABLE)
 * a lun for OAS operations.
 *
 * Return:
 * SUCCESS: 0
 * -ENOMEM: failed to enable an lun for OAS operations
 * -EPERM: OAS is not enabled
 */
static ssize_t
lpfc_oas_lun_state_change(struct lpfc_hba *phba, uint8_t vpt_wwpn[],
                          uint8_t tgt_wwpn[], uint64_t lun,
                          uint32_t oas_state, uint8_t pri)
{

        int rc;

        rc = lpfc_oas_lun_state_set(phba, vpt_wwpn, tgt_wwpn, lun,
                                    oas_state, pri);
        return rc;
}

/**
 * lpfc_oas_lun_show - Return oas enabled luns from a chosen target
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 *
 * This routine returns a lun enabled for OAS each time the function
 * is called.
 *
 * Returns:
 * SUCCESS: size of formatted string.
 * -EFAULT: target or vport wwpn was not set properly.
 * -EPERM: oas is not enabled.
 **/
static ssize_t
lpfc_oas_lun_show(struct device *dev, struct device_attribute *attr,
                  char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;

        uint64_t oas_lun;
        int len = 0;

        if (!phba->cfg_fof)
                return -EPERM;

        if (wwn_to_u64(phba->cfg_oas_vpt_wwpn) == 0)
                if (!(phba->cfg_oas_flags & OAS_FIND_ANY_VPORT))
                        return -EFAULT;

        if (wwn_to_u64(phba->cfg_oas_tgt_wwpn) == 0)
                if (!(phba->cfg_oas_flags & OAS_FIND_ANY_TARGET))
                        return -EFAULT;

        oas_lun = lpfc_oas_lun_get_next(phba, phba->cfg_oas_vpt_wwpn,
                                        phba->cfg_oas_tgt_wwpn,
                                        &phba->cfg_oas_lun_status,
                                        &phba->cfg_oas_priority);
        if (oas_lun != NOT_OAS_ENABLED_LUN)
                phba->cfg_oas_flags |= OAS_LUN_VALID;

        len += scnprintf(buf + len, PAGE_SIZE-len, "0x%llx", oas_lun);

        return len;
}

/**
 * lpfc_oas_lun_store - Sets the OAS state for lun
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: buffer for passing information.
 * @count: size of the formatting string
 *
 * This function sets the OAS state for lun.  Before this function is called,
 * the vport wwpn, target wwpn, and oas state need to be set.
 *
 * Returns:
 * SUCCESS: size of formatted string.
 * -EFAULT: target or vport wwpn was not set properly.
 * -EPERM: oas is not enabled.
 * size of formatted string.
 **/
static ssize_t
lpfc_oas_lun_store(struct device *dev, struct device_attribute *attr,
                   const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
        uint64_t scsi_lun;
        uint32_t pri;
        ssize_t rc;

        if (!phba->cfg_fof)
                return -EPERM;

        if (wwn_to_u64(phba->cfg_oas_vpt_wwpn) == 0)
                return -EFAULT;

        if (wwn_to_u64(phba->cfg_oas_tgt_wwpn) == 0)
                return -EFAULT;

        if (!isdigit(buf[0]))
                return -EINVAL;

        if (sscanf(buf, "0x%llx", &scsi_lun) != 1)
                return -EINVAL;

        pri = phba->cfg_oas_priority;
        if (pri == 0)
                pri = phba->cfg_XLanePriority;

        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                        "3372 Try to set vport 0x%llx target 0x%llx lun:0x%llx "
                        "priority 0x%x with oas state %d\n",
                        wwn_to_u64(phba->cfg_oas_vpt_wwpn),
                        wwn_to_u64(phba->cfg_oas_tgt_wwpn), scsi_lun,
                        pri, phba->cfg_oas_lun_state);

        rc = lpfc_oas_lun_state_change(phba, phba->cfg_oas_vpt_wwpn,
                                       phba->cfg_oas_tgt_wwpn, scsi_lun,
                                       phba->cfg_oas_lun_state, pri);
        if (rc)
                return rc;

        return count;
}
static DEVICE_ATTR(lpfc_xlane_lun, S_IRUGO | S_IWUSR,
                   lpfc_oas_lun_show, lpfc_oas_lun_store);

int lpfc_enable_nvmet_cnt;
unsigned long long lpfc_enable_nvmet[LPFC_NVMET_MAX_PORTS] = {
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
module_param_array(lpfc_enable_nvmet, ullong, &lpfc_enable_nvmet_cnt, 0444);
MODULE_PARM_DESC(lpfc_enable_nvmet, "Enable HBA port(s) WWPN as a NVME Target");

static int lpfc_poll = 0;
module_param(lpfc_poll, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_poll, "FCP ring polling mode control:"
                 " 0 - none,"
                 " 1 - poll with interrupts enabled"
                 " 3 - poll and disable FCP ring interrupts");

static DEVICE_ATTR_RW(lpfc_poll);

int lpfc_no_hba_reset_cnt;
unsigned long lpfc_no_hba_reset[MAX_HBAS_NO_RESET] = {
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
module_param_array(lpfc_no_hba_reset, ulong, &lpfc_no_hba_reset_cnt, 0444);
MODULE_PARM_DESC(lpfc_no_hba_reset, "WWPN of HBAs that should not be reset");

LPFC_ATTR(sli_mode, 0, 0, 3,
        "SLI mode selector:"
        " 0 - auto (SLI-3 if supported),"
        " 2 - select SLI-2 even on SLI-3 capable HBAs,"
        " 3 - select SLI-3");

LPFC_ATTR_R(enable_npiv, 1, 0, 1,
        "Enable NPIV functionality");

LPFC_ATTR_R(fcf_failover_policy, 1, 1, 2,
        "FCF Fast failover=1 Priority failover=2");

/*
# lpfc_enable_rrq: Track XRI/OXID reuse after IO failures
#       0x0 = disabled, XRI/OXID use not tracked.
#       0x1 = XRI/OXID reuse is timed with ratov, RRQ sent.
#       0x2 = XRI/OXID reuse is timed with ratov, No RRQ sent.
*/
LPFC_ATTR_R(enable_rrq, 2, 0, 2,
        "Enable RRQ functionality");

/*
# lpfc_suppress_link_up:  Bring link up at initialization
#            0x0  = bring link up (issue MBX_INIT_LINK)
#            0x1  = do NOT bring link up at initialization(MBX_INIT_LINK)
#            0x2  = never bring up link
# Default value is 0.
*/
LPFC_ATTR_R(suppress_link_up, LPFC_INITIALIZE_LINK, LPFC_INITIALIZE_LINK,
                LPFC_DELAY_INIT_LINK_INDEFINITELY,
                "Suppress Link Up at initialization");

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

        return scnprintf(buf, PAGE_SIZE, "%d\n",
                         phba->sli4_hba.pc_sli4_params.pls);
}
static DEVICE_ATTR(pls, 0444,
                         lpfc_pls_show, NULL);

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

        return scnprintf(buf, PAGE_SIZE, "%d\n",
                         (phba->hba_flag & HBA_PERSISTENT_TOPO) ? 1 : 0);
}
static DEVICE_ATTR(pt, 0444,
                         lpfc_pt_show, NULL);

/*
# lpfc_cnt: Number of IOCBs allocated for ELS, CT, and ABTS
#       1 - (1024)
#       2 - (2048)
#       3 - (3072)
#       4 - (4096)
#       5 - (5120)
*/
static ssize_t
lpfc_iocb_hw_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;

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

static DEVICE_ATTR(iocb_hw, S_IRUGO,
                         lpfc_iocb_hw_show, NULL);
static ssize_t
lpfc_txq_hw_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
        struct lpfc_sli_ring *pring = lpfc_phba_elsring(phba);

        return scnprintf(buf, PAGE_SIZE, "%d\n",
                        pring ? pring->txq_max : 0);
}

static DEVICE_ATTR(txq_hw, S_IRUGO,
                         lpfc_txq_hw_show, NULL);
static ssize_t
lpfc_txcmplq_hw_show(struct device *dev, struct device_attribute *attr,
 char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
        struct lpfc_sli_ring *pring = lpfc_phba_elsring(phba);

        return scnprintf(buf, PAGE_SIZE, "%d\n",
                        pring ? pring->txcmplq_max : 0);
}

static DEVICE_ATTR(txcmplq_hw, S_IRUGO,
                         lpfc_txcmplq_hw_show, NULL);

/*
# lpfc_nodev_tmo: If set, it will hold all I/O errors on devices that disappear
# until the timer expires. Value range is [0,255]. Default value is 30.
*/
static int lpfc_nodev_tmo = LPFC_DEF_DEVLOSS_TMO;
static int lpfc_devloss_tmo = LPFC_DEF_DEVLOSS_TMO;
module_param(lpfc_nodev_tmo, int, 0);
MODULE_PARM_DESC(lpfc_nodev_tmo,
                 "Seconds driver will hold I/O waiting "
                 "for a device to come back");

/**
 * lpfc_nodev_tmo_show - Return the hba dev loss timeout value
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the dev loss timeout in decimal.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_nodev_tmo_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->cfg_devloss_tmo);
}

/**
 * lpfc_nodev_tmo_init - Set the hba nodev timeout value
 * @vport: lpfc vport structure pointer.
 * @val: contains the nodev timeout value.
 *
 * Description:
 * If the devloss tmo is already set then nodev tmo is set to devloss tmo,
 * a kernel error message is printed and zero is returned.
 * Else if val is in range then nodev tmo and devloss tmo are set to val.
 * Otherwise nodev tmo is set to the default value.
 *
 * Returns:
 * zero if already set or if val is in range
 * -EINVAL val out of range
 **/
static int
lpfc_nodev_tmo_init(struct lpfc_vport *vport, int val)
{
        if (vport->cfg_devloss_tmo != LPFC_DEF_DEVLOSS_TMO) {
                vport->cfg_nodev_tmo = vport->cfg_devloss_tmo;
                if (val != LPFC_DEF_DEVLOSS_TMO)
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                         "0407 Ignoring lpfc_nodev_tmo module "
                                         "parameter because lpfc_devloss_tmo "
                                         "is set.\n");
                return 0;
        }

        if (val >= LPFC_MIN_DEVLOSS_TMO && val <= LPFC_MAX_DEVLOSS_TMO) {
                vport->cfg_nodev_tmo = val;
                vport->cfg_devloss_tmo = val;
                return 0;
        }
        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                         "0400 lpfc_nodev_tmo attribute cannot be set to"
                         " %d, allowed range is [%d, %d]\n",
                         val, LPFC_MIN_DEVLOSS_TMO, LPFC_MAX_DEVLOSS_TMO);
        vport->cfg_nodev_tmo = LPFC_DEF_DEVLOSS_TMO;
        return -EINVAL;
}

/**
 * lpfc_update_rport_devloss_tmo - Update dev loss tmo value
 * @vport: lpfc vport structure pointer.
 *
 * Description:
 * Update all the ndlp's dev loss tmo with the vport devloss tmo value.
 **/
static void
lpfc_update_rport_devloss_tmo(struct lpfc_vport *vport)
{
        struct Scsi_Host  *shost;
        struct lpfc_nodelist  *ndlp;
#if (IS_ENABLED(CONFIG_NVME_FC))
        struct lpfc_nvme_rport *rport;
        struct nvme_fc_remote_port *remoteport = NULL;
#endif

        shost = lpfc_shost_from_vport(vport);
        spin_lock_irq(shost->host_lock);
        list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
                if (ndlp->rport)
                        ndlp->rport->dev_loss_tmo = vport->cfg_devloss_tmo;
#if (IS_ENABLED(CONFIG_NVME_FC))
                spin_lock(&ndlp->lock);
                rport = lpfc_ndlp_get_nrport(ndlp);
                if (rport)
                        remoteport = rport->remoteport;
                spin_unlock(&ndlp->lock);
                if (rport && remoteport)
                        nvme_fc_set_remoteport_devloss(remoteport,
                                                       vport->cfg_devloss_tmo);
#endif
        }
        spin_unlock_irq(shost->host_lock);
}

/**
 * lpfc_nodev_tmo_set - Set the vport nodev tmo and devloss tmo values
 * @vport: lpfc vport structure pointer.
 * @val: contains the tmo value.
 *
 * Description:
 * If the devloss tmo is already set or the vport dev loss tmo has changed
 * then a kernel error message is printed and zero is returned.
 * Else if val is in range then nodev tmo and devloss tmo are set to val.
 * Otherwise nodev tmo is set to the default value.
 *
 * Returns:
 * zero if already set or if val is in range
 * -EINVAL val out of range
 **/
static int
lpfc_nodev_tmo_set(struct lpfc_vport *vport, int val)
{
        if (vport->dev_loss_tmo_changed ||
            (lpfc_devloss_tmo != LPFC_DEF_DEVLOSS_TMO)) {
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                 "0401 Ignoring change to lpfc_nodev_tmo "
                                 "because lpfc_devloss_tmo is set.\n");
                return 0;
        }
        if (val >= LPFC_MIN_DEVLOSS_TMO && val <= LPFC_MAX_DEVLOSS_TMO) {
                vport->cfg_nodev_tmo = val;
                vport->cfg_devloss_tmo = val;
                /*
                 * For compat: set the fc_host dev loss so new rports
                 * will get the value.
                 */
                fc_host_dev_loss_tmo(lpfc_shost_from_vport(vport)) = val;
                lpfc_update_rport_devloss_tmo(vport);
                return 0;
        }
        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                         "0403 lpfc_nodev_tmo attribute cannot be set to "
                         "%d, allowed range is [%d, %d]\n",
                         val, LPFC_MIN_DEVLOSS_TMO, LPFC_MAX_DEVLOSS_TMO);
        return -EINVAL;
}

lpfc_vport_param_store(nodev_tmo)

static DEVICE_ATTR_RW(lpfc_nodev_tmo);

/*
# lpfc_devloss_tmo: If set, it will hold all I/O errors on devices that
# disappear until the timer expires. Value range is [0,255]. Default
# value is 30.
*/
module_param(lpfc_devloss_tmo, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_devloss_tmo,
                 "Seconds driver will hold I/O waiting "
                 "for a device to come back");
lpfc_vport_param_init(devloss_tmo, LPFC_DEF_DEVLOSS_TMO,
                      LPFC_MIN_DEVLOSS_TMO, LPFC_MAX_DEVLOSS_TMO)
lpfc_vport_param_show(devloss_tmo)

/**
 * lpfc_devloss_tmo_set - Sets vport nodev tmo, devloss tmo values, changed bit
 * @vport: lpfc vport structure pointer.
 * @val: contains the tmo value.
 *
 * Description:
 * If val is in a valid range then set the vport nodev tmo,
 * devloss tmo, also set the vport dev loss tmo changed flag.
 * Else a kernel error message is printed.
 *
 * Returns:
 * zero if val is in range
 * -EINVAL val out of range
 **/
static int
lpfc_devloss_tmo_set(struct lpfc_vport *vport, int val)
{
        if (val >= LPFC_MIN_DEVLOSS_TMO && val <= LPFC_MAX_DEVLOSS_TMO) {
                vport->cfg_nodev_tmo = val;
                vport->cfg_devloss_tmo = val;
                vport->dev_loss_tmo_changed = 1;
                fc_host_dev_loss_tmo(lpfc_shost_from_vport(vport)) = val;
                lpfc_update_rport_devloss_tmo(vport);
                return 0;
        }

        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                         "0404 lpfc_devloss_tmo attribute cannot be set to "
                         "%d, allowed range is [%d, %d]\n",
                         val, LPFC_MIN_DEVLOSS_TMO, LPFC_MAX_DEVLOSS_TMO);
        return -EINVAL;
}

lpfc_vport_param_store(devloss_tmo)
static DEVICE_ATTR_RW(lpfc_devloss_tmo);

/*
 * lpfc_suppress_rsp: Enable suppress rsp feature is firmware supports it
 * lpfc_suppress_rsp = 0  Disable
 * lpfc_suppress_rsp = 1  Enable (default)
 *
 */
LPFC_ATTR_R(suppress_rsp, 1, 0, 1,
            "Enable suppress rsp feature is firmware supports it");

/*
 * lpfc_nvmet_mrq: Specify number of RQ pairs for processing NVMET cmds
 * lpfc_nvmet_mrq = 0  driver will calcualte optimal number of RQ pairs
 * lpfc_nvmet_mrq = 1  use a single RQ pair
 * lpfc_nvmet_mrq >= 2  use specified RQ pairs for MRQ
 *
 */
LPFC_ATTR_R(nvmet_mrq,
            LPFC_NVMET_MRQ_AUTO, LPFC_NVMET_MRQ_AUTO, LPFC_NVMET_MRQ_MAX,
            "Specify number of RQ pairs for processing NVMET cmds");

/*
 * lpfc_nvmet_mrq_post: Specify number of RQ buffer to initially post
 * to each NVMET RQ. Range 64 to 2048, default is 512.
 */
LPFC_ATTR_R(nvmet_mrq_post,
            LPFC_NVMET_RQE_DEF_POST, LPFC_NVMET_RQE_MIN_POST,
            LPFC_NVMET_RQE_DEF_COUNT,
            "Specify number of RQ buffers to initially post");

/*
 * lpfc_enable_fc4_type: Defines what FC4 types are supported.
 * Supported Values:  1 - register just FCP
 *                    3 - register both FCP and NVME
 * Supported values are [1,3]. Default value is 3
 */
LPFC_ATTR_R(enable_fc4_type, LPFC_ENABLE_BOTH,
            LPFC_ENABLE_FCP, LPFC_ENABLE_BOTH,
            "Enable FC4 Protocol support - FCP / NVME");

/*
# lpfc_log_verbose: Only turn this flag on if you are willing to risk being
# deluged with LOTS of information.
# You can set a bit mask to record specific types of verbose messages:
# See lpfc_logmsh.h for definitions.
*/
LPFC_VPORT_ATTR_HEX_RW(log_verbose, 0x0, 0x0, 0xffffffff,
                       "Verbose logging bit-mask");

/*
# lpfc_enable_da_id: This turns on the DA_ID CT command that deregisters
# objects that have been registered with the nameserver after login.
*/
LPFC_VPORT_ATTR_R(enable_da_id, 1, 0, 1,
                  "Deregister nameserver objects before LOGO");

/*
# lun_queue_depth:  This parameter is used to limit the number of outstanding
# commands per FCP LUN.
*/
LPFC_VPORT_ATTR_R(lun_queue_depth, 64, 1, 512,
                  "Max number of FCP commands we can queue to a specific LUN");

/*
# tgt_queue_depth:  This parameter is used to limit the number of outstanding
# commands per target port. Value range is [10,65535]. Default value is 65535.
*/
static uint lpfc_tgt_queue_depth = LPFC_MAX_TGT_QDEPTH;
module_param(lpfc_tgt_queue_depth, uint, 0444);
MODULE_PARM_DESC(lpfc_tgt_queue_depth, "Set max Target queue depth");
lpfc_vport_param_show(tgt_queue_depth);
lpfc_vport_param_init(tgt_queue_depth, LPFC_MAX_TGT_QDEPTH,
                      LPFC_MIN_TGT_QDEPTH, LPFC_MAX_TGT_QDEPTH);

/**
 * lpfc_tgt_queue_depth_store: Sets an attribute value.
 * @vport: lpfc vport structure pointer.
 * @val: integer attribute value.
 *
 * Description: Sets the parameter to the new value.
 *
 * Returns:
 * zero on success
 * -EINVAL if val is invalid
 */
static int
lpfc_tgt_queue_depth_set(struct lpfc_vport *vport, uint val)
{
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
        struct lpfc_nodelist *ndlp;

        if (!lpfc_rangecheck(val, LPFC_MIN_TGT_QDEPTH, LPFC_MAX_TGT_QDEPTH))
                return -EINVAL;

        if (val == vport->cfg_tgt_queue_depth)
                return 0;

        spin_lock_irq(shost->host_lock);
        vport->cfg_tgt_queue_depth = val;

        /* Next loop thru nodelist and change cmd_qdepth */
        list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp)
                ndlp->cmd_qdepth = vport->cfg_tgt_queue_depth;

        spin_unlock_irq(shost->host_lock);
        return 0;
}

lpfc_vport_param_store(tgt_queue_depth);
static DEVICE_ATTR_RW(lpfc_tgt_queue_depth);

/*
# hba_queue_depth:  This parameter is used to limit the number of outstanding
# commands per lpfc HBA. Value range is [32,8192]. If this parameter
# value is greater than the maximum number of exchanges supported by the HBA,
# then maximum number of exchanges supported by the HBA is used to determine
# the hba_queue_depth.
*/
LPFC_ATTR_R(hba_queue_depth, 8192, 32, 8192,
            "Max number of FCP commands we can queue to a lpfc HBA");

/*
# peer_port_login:  This parameter allows/prevents logins
# between peer ports hosted on the same physical port.
# When this parameter is set 0 peer ports of same physical port
# are not allowed to login to each other.
# When this parameter is set 1 peer ports of same physical port
# are allowed to login to each other.
# Default value of this parameter is 0.
*/
LPFC_VPORT_ATTR_R(peer_port_login, 0, 0, 1,
                  "Allow peer ports on the same physical port to login to each "
                  "other.");

/*
# restrict_login:  This parameter allows/prevents logins
# between Virtual Ports and remote initiators.
# When this parameter is not set (0) Virtual Ports will accept PLOGIs from
# other initiators and will attempt to PLOGI all remote ports.
# When this parameter is set (1) Virtual Ports will reject PLOGIs from
# remote ports and will not attempt to PLOGI to other initiators.
# This parameter does not restrict to the physical port.
# This parameter does not restrict logins to Fabric resident remote ports.
# Default value of this parameter is 1.
*/
static int lpfc_restrict_login = 1;
module_param(lpfc_restrict_login, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_restrict_login,
                 "Restrict virtual ports login to remote initiators.");
lpfc_vport_param_show(restrict_login);

/**
 * lpfc_restrict_login_init - Set the vport restrict login flag
 * @vport: lpfc vport structure pointer.
 * @val: contains the restrict login value.
 *
 * Description:
 * If val is not in a valid range then log a kernel error message and set
 * the vport restrict login to one.
 * If the port type is physical clear the restrict login flag and return.
 * Else set the restrict login flag to val.
 *
 * Returns:
 * zero if val is in range
 * -EINVAL val out of range
 **/
static int
lpfc_restrict_login_init(struct lpfc_vport *vport, int val)
{
        if (val < 0 || val > 1) {
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                 "0422 lpfc_restrict_login attribute cannot "
                                 "be set to %d, allowed range is [0, 1]\n",
                                 val);
                vport->cfg_restrict_login = 1;
                return -EINVAL;
        }
        if (vport->port_type == LPFC_PHYSICAL_PORT) {
                vport->cfg_restrict_login = 0;
                return 0;
        }
        vport->cfg_restrict_login = val;
        return 0;
}

/**
 * lpfc_restrict_login_set - Set the vport restrict login flag
 * @vport: lpfc vport structure pointer.
 * @val: contains the restrict login value.
 *
 * Description:
 * If val is not in a valid range then log a kernel error message and set
 * the vport restrict login to one.
 * If the port type is physical and the val is not zero log a kernel
 * error message, clear the restrict login flag and return zero.
 * Else set the restrict login flag to val.
 *
 * Returns:
 * zero if val is in range
 * -EINVAL val out of range
 **/
static int
lpfc_restrict_login_set(struct lpfc_vport *vport, int val)
{
        if (val < 0 || val > 1) {
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                 "0425 lpfc_restrict_login attribute cannot "
                                 "be set to %d, allowed range is [0, 1]\n",
                                 val);
                vport->cfg_restrict_login = 1;
                return -EINVAL;
        }
        if (vport->port_type == LPFC_PHYSICAL_PORT && val != 0) {
                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                 "0468 lpfc_restrict_login must be 0 for "
                                 "Physical ports.\n");
                vport->cfg_restrict_login = 0;
                return 0;
        }
        vport->cfg_restrict_login = val;
        return 0;
}
lpfc_vport_param_store(restrict_login);
static DEVICE_ATTR_RW(lpfc_restrict_login);

/*
# Some disk devices have a "select ID" or "select Target" capability.
# From a protocol standpoint "select ID" usually means select the
# Fibre channel "ALPA".  In the FC-AL Profile there is an "informative
# annex" which contains a table that maps a "select ID" (a number
# between 0 and 7F) to an ALPA.  By default, for compatibility with
# older drivers, the lpfc driver scans this table from low ALPA to high
# ALPA.
#
# Turning on the scan-down variable (on  = 1, off = 0) will
# cause the lpfc driver to use an inverted table, effectively
# scanning ALPAs from high to low. Value range is [0,1]. Default value is 1.
#
# (Note: This "select ID" functionality is a LOOP ONLY characteristic
# and will not work across a fabric. Also this parameter will take
# effect only in the case when ALPA map is not available.)
*/
LPFC_VPORT_ATTR_R(scan_down, 1, 0, 1,
                  "Start scanning for devices from highest ALPA to lowest");

/*
# lpfc_topology:  link topology for init link
#            0x0  = attempt loop mode then point-to-point
#            0x01 = internal loopback mode
#            0x02 = attempt point-to-point mode only
#            0x04 = attempt loop mode only
#            0x06 = attempt point-to-point mode then loop
# Set point-to-point mode if you want to run as an N_Port.
# Set loop mode if you want to run as an NL_Port. Value range is [0,0x6].
# Default value is 0.
*/
LPFC_ATTR(topology, 0, 0, 6,
        "Select Fibre Channel topology");

/**
 * lpfc_topology_set - Set the adapters topology field
 * @dev: class device that is converted into a scsi_host.
 * @attr:device attribute, not used.
 * @buf: buffer for passing information.
 * @count: size of the data buffer.
 *
 * Description:
 * If val is in a valid range then set the adapter's topology field and
 * issue a lip; if the lip fails reset the topology to the old value.
 *
 * If the value is not in range log a kernel error message and return an error.
 *
 * Returns:
 * zero if val is in range and lip okay
 * non-zero return value from lpfc_issue_lip()
 * -EINVAL val out of range
 **/
static ssize_t
lpfc_topology_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 val = 0;
        int nolip = 0;
        const char *val_buf = buf;
        int err;
        uint32_t prev_val;

        if (!strncmp(buf, "nolip ", strlen("nolip "))) {
                nolip = 1;
                val_buf = &buf[strlen("nolip ")];
        }

        if (!isdigit(val_buf[0]))
                return -EINVAL;
        if (sscanf(val_buf, "%i", &val) != 1)
                return -EINVAL;

        if (val >= 0 && val <= 6) {
                prev_val = phba->cfg_topology;
                if (phba->cfg_link_speed == LPFC_USER_LINK_SPEED_16G &&
                        val == 4) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                "3113 Loop mode not supported at speed %d\n",
                                val);
                        return -EINVAL;
                }
                /*
                 * The 'topology' is not a configurable parameter if :
                 *   - persistent topology enabled
                 *   - G7/G6 with no private loop support
                 */

                if ((phba->hba_flag & HBA_PERSISTENT_TOPO ||
                     (!phba->sli4_hba.pc_sli4_params.pls &&
                     (phba->pcidev->device == PCI_DEVICE_ID_LANCER_G6_FC ||
                     phba->pcidev->device == PCI_DEVICE_ID_LANCER_G7_FC))) &&
                    val == 4) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                "3114 Loop mode not supported\n");
                        return -EINVAL;
                }
                phba->cfg_topology = val;
                if (nolip)
                        return strlen(buf);

                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                        "3054 lpfc_topology changed from %d to %d\n",
                        prev_val, val);
                if (prev_val != val && phba->sli_rev == LPFC_SLI_REV4)
                        phba->fc_topology_changed = 1;
                err = lpfc_issue_lip(lpfc_shost_from_vport(phba->pport));
                if (err) {
                        phba->cfg_topology = prev_val;
                        return -EINVAL;
                } else
                        return strlen(buf);
        }
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                "%d:0467 lpfc_topology attribute cannot be set to %d, "
                "allowed range is [0, 6]\n",
                phba->brd_no, val);
        return -EINVAL;
}

lpfc_param_show(topology)
static DEVICE_ATTR_RW(lpfc_topology);

/**
 * lpfc_static_vport_show: Read callback function for
 *   lpfc_static_vport sysfs file.
 * @dev: Pointer to class device object.
 * @attr: device attribute structure.
 * @buf: Data buffer.
 *
 * This function is the read call back function for
 * lpfc_static_vport sysfs file. The lpfc_static_vport
 * sysfs file report the mageability of the vport.
 **/
static ssize_t
lpfc_static_vport_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;
        if (vport->vport_flag & STATIC_VPORT)
                sprintf(buf, "1\n");
        else
                sprintf(buf, "0\n");

        return strlen(buf);
}

/*
 * Sysfs attribute to control the statistical data collection.
 */
static DEVICE_ATTR_RO(lpfc_static_vport);

/**
 * lpfc_stat_data_ctrl_store - write call back for lpfc_stat_data_ctrl sysfs file
 * @dev: Pointer to class device.
 * @attr: Unused.
 * @buf: Data buffer.
 * @count: Size of the data buffer.
 *
 * This function get called when a user write to the lpfc_stat_data_ctrl
 * sysfs file. This function parse the command written to the sysfs file
 * and take appropriate action. These commands are used for controlling
 * driver statistical data collection.
 * Following are the command this function handles.
 *
 *    setbucket <bucket_type> <base> <step>
 *                             = Set the latency buckets.
 *    destroybucket            = destroy all the buckets.
 *    start                    = start data collection
 *    stop                     = stop data collection
 *    reset                    = reset the collected data
 **/
static ssize_t
lpfc_stat_data_ctrl_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;
#define LPFC_MAX_DATA_CTRL_LEN 1024
        static char bucket_data[LPFC_MAX_DATA_CTRL_LEN];
        unsigned long i;
        char *str_ptr, *token;
        struct lpfc_vport **vports;
        struct Scsi_Host *v_shost;
        char *bucket_type_str, *base_str, *step_str;
        unsigned long base, step, bucket_type;

        if (!strncmp(buf, "setbucket", strlen("setbucket"))) {
                if (strlen(buf) > (LPFC_MAX_DATA_CTRL_LEN - 1))
                        return -EINVAL;

                strncpy(bucket_data, buf, LPFC_MAX_DATA_CTRL_LEN);
                str_ptr = &bucket_data[0];
                /* Ignore this token - this is command token */
                token = strsep(&str_ptr, "\t ");
                if (!token)
                        return -EINVAL;

                bucket_type_str = strsep(&str_ptr, "\t ");
                if (!bucket_type_str)
                        return -EINVAL;

                if (!strncmp(bucket_type_str, "linear", strlen("linear")))
                        bucket_type = LPFC_LINEAR_BUCKET;
                else if (!strncmp(bucket_type_str, "power2", strlen("power2")))
                        bucket_type = LPFC_POWER2_BUCKET;
                else
                        return -EINVAL;

                base_str = strsep(&str_ptr, "\t ");
                if (!base_str)
                        return -EINVAL;
                base = simple_strtoul(base_str, NULL, 0);

                step_str = strsep(&str_ptr, "\t ");
                if (!step_str)
                        return -EINVAL;
                step = simple_strtoul(step_str, NULL, 0);
                if (!step)
                        return -EINVAL;

                /* Block the data collection for every vport */
                vports = lpfc_create_vport_work_array(phba);
                if (vports == NULL)
                        return -ENOMEM;

                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                        v_shost = lpfc_shost_from_vport(vports[i]);
                        spin_lock_irq(v_shost->host_lock);
                        /* Block and reset data collection */
                        vports[i]->stat_data_blocked = 1;
                        if (vports[i]->stat_data_enabled)
                                lpfc_vport_reset_stat_data(vports[i]);
                        spin_unlock_irq(v_shost->host_lock);
                }

                /* Set the bucket attributes */
                phba->bucket_type = bucket_type;
                phba->bucket_base = base;
                phba->bucket_step = step;

                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                        v_shost = lpfc_shost_from_vport(vports[i]);

                        /* Unblock data collection */
                        spin_lock_irq(v_shost->host_lock);
                        vports[i]->stat_data_blocked = 0;
                        spin_unlock_irq(v_shost->host_lock);
                }
                lpfc_destroy_vport_work_array(phba, vports);
                return strlen(buf);
        }

        if (!strncmp(buf, "destroybucket", strlen("destroybucket"))) {
                vports = lpfc_create_vport_work_array(phba);
                if (vports == NULL)
                        return -ENOMEM;

                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
                        v_shost = lpfc_shost_from_vport(vports[i]);
                        spin_lock_irq(shost->host_lock);
                        vports[i]->stat_data_blocked = 1;
                        lpfc_free_bucket(vport);
                        vport->stat_data_enabled = 0;
                        vports[i]->stat_data_blocked = 0;
                        spin_unlock_irq(shost->host_lock);
                }
                lpfc_destroy_vport_work_array(phba, vports);
                phba->bucket_type = LPFC_NO_BUCKET;
                phba->bucket_base = 0;
                phba->bucket_step = 0;
                return strlen(buf);
        }

        if (!strncmp(buf, "start", strlen("start"))) {
                /* If no buckets configured return error */
                if (phba->bucket_type == LPFC_NO_BUCKET)
                        return -EINVAL;
                spin_lock_irq(shost->host_lock);
                if (vport->stat_data_enabled) {
                        spin_unlock_irq(shost->host_lock);
                        return strlen(buf);
                }
                lpfc_alloc_bucket(vport);
                vport->stat_data_enabled = 1;
                spin_unlock_irq(shost->host_lock);
                return strlen(buf);
        }

        if (!strncmp(buf, "stop", strlen("stop"))) {
                spin_lock_irq(shost->host_lock);
                if (vport->stat_data_enabled == 0) {
                        spin_unlock_irq(shost->host_lock);
                        return strlen(buf);
                }
                lpfc_free_bucket(vport);
                vport->stat_data_enabled = 0;
                spin_unlock_irq(shost->host_lock);
                return strlen(buf);
        }

        if (!strncmp(buf, "reset", strlen("reset"))) {
                if ((phba->bucket_type == LPFC_NO_BUCKET)
                        || !vport->stat_data_enabled)
                        return strlen(buf);
                spin_lock_irq(shost->host_lock);
                vport->stat_data_blocked = 1;
                lpfc_vport_reset_stat_data(vport);
                vport->stat_data_blocked = 0;
                spin_unlock_irq(shost->host_lock);
                return strlen(buf);
        }
        return -EINVAL;
}


/**
 * lpfc_stat_data_ctrl_show - Read function for lpfc_stat_data_ctrl sysfs file
 * @dev: Pointer to class device.
 * @attr: Unused.
 * @buf: Data buffer.
 *
 * This function is the read call back function for
 * lpfc_stat_data_ctrl sysfs file. This function report the
 * current statistical data collection state.
 **/
static ssize_t
lpfc_stat_data_ctrl_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 index = 0;
        int i;
        char *bucket_type;
        unsigned long bucket_value;

        switch (phba->bucket_type) {
        case LPFC_LINEAR_BUCKET:
                bucket_type = "linear";
                break;
        case LPFC_POWER2_BUCKET:
                bucket_type = "power2";
                break;
        default:
                bucket_type = "No Bucket";
                break;
        }

        sprintf(&buf[index], "Statistical Data enabled :%d, "
                "blocked :%d, Bucket type :%s, Bucket base :%d,"
                " Bucket step :%d\nLatency Ranges :",
                vport->stat_data_enabled, vport->stat_data_blocked,
                bucket_type, phba->bucket_base, phba->bucket_step);
        index = strlen(buf);
        if (phba->bucket_type != LPFC_NO_BUCKET) {
                for (i = 0; i < LPFC_MAX_BUCKET_COUNT; i++) {
                        if (phba->bucket_type == LPFC_LINEAR_BUCKET)
                                bucket_value = phba->bucket_base +
                                        phba->bucket_step * i;
                        else
                                bucket_value = phba->bucket_base +
                                (1 << i) * phba->bucket_step;

                        if (index + 10 > PAGE_SIZE)
                                break;
                        sprintf(&buf[index], "%08ld ", bucket_value);
                        index = strlen(buf);
                }
        }
        sprintf(&buf[index], "\n");
        return strlen(buf);
}

/*
 * Sysfs attribute to control the statistical data collection.
 */
static DEVICE_ATTR_RW(lpfc_stat_data_ctrl);

/*
 * lpfc_drvr_stat_data: sysfs attr to get driver statistical data.
 */

/*
 * Each Bucket takes 11 characters and 1 new line + 17 bytes WWN
 * for each target.
 */
#define STAT_DATA_SIZE_PER_TARGET(NUM_BUCKETS) ((NUM_BUCKETS) * 11 + 18)
#define MAX_STAT_DATA_SIZE_PER_TARGET \
        STAT_DATA_SIZE_PER_TARGET(LPFC_MAX_BUCKET_COUNT)


/**
 * sysfs_drvr_stat_data_read - Read function for lpfc_drvr_stat_data attribute
 * @filp: sysfs file
 * @kobj: Pointer to the kernel object
 * @bin_attr: Attribute object
 * @buf: Buffer pointer
 * @off: File offset
 * @count: Buffer size
 *
 * This function is the read call back function for lpfc_drvr_stat_data
 * sysfs file. This function export the statistical data to user
 * applications.
 **/
static ssize_t
sysfs_drvr_stat_data_read(struct file *filp, struct kobject *kobj,
                struct bin_attribute *bin_attr,
                char *buf, loff_t off, size_t count)
{
        struct device *dev = container_of(kobj, struct device,
                kobj);
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int i = 0, index = 0;
        unsigned long nport_index;
        struct lpfc_nodelist *ndlp = NULL;
        nport_index = (unsigned long)off /
                MAX_STAT_DATA_SIZE_PER_TARGET;

        if (!vport->stat_data_enabled || vport->stat_data_blocked
                || (phba->bucket_type == LPFC_NO_BUCKET))
                return 0;

        spin_lock_irq(shost->host_lock);
        list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
                if (!ndlp->lat_data)
                        continue;

                if (nport_index > 0) {
                        nport_index--;
                        continue;
                }

                if ((index + MAX_STAT_DATA_SIZE_PER_TARGET)
                        > count)
                        break;

                if (!ndlp->lat_data)
                        continue;

                /* Print the WWN */
                sprintf(&buf[index], "%02x%02x%02x%02x%02x%02x%02x%02x:",
                        ndlp->nlp_portname.u.wwn[0],
                        ndlp->nlp_portname.u.wwn[1],
                        ndlp->nlp_portname.u.wwn[2],
                        ndlp->nlp_portname.u.wwn[3],
                        ndlp->nlp_portname.u.wwn[4],
                        ndlp->nlp_portname.u.wwn[5],
                        ndlp->nlp_portname.u.wwn[6],
                        ndlp->nlp_portname.u.wwn[7]);

                index = strlen(buf);

                for (i = 0; i < LPFC_MAX_BUCKET_COUNT; i++) {
                        sprintf(&buf[index], "%010u,",
                                ndlp->lat_data[i].cmd_count);
                        index = strlen(buf);
                }
                sprintf(&buf[index], "\n");
                index = strlen(buf);
        }
        spin_unlock_irq(shost->host_lock);
        return index;
}

static struct bin_attribute sysfs_drvr_stat_data_attr = {
        .attr = {
                .name = "lpfc_drvr_stat_data",
                .mode = S_IRUSR,
        },
        .size = LPFC_MAX_TARGET * MAX_STAT_DATA_SIZE_PER_TARGET,
        .read = sysfs_drvr_stat_data_read,
        .write = NULL,
};

/*
# lpfc_link_speed: Link speed selection for initializing the Fibre Channel
# connection.
# Value range is [0,16]. Default value is 0.
*/
/**
 * lpfc_link_speed_set - Set the adapters link speed
 * @dev: Pointer to class device.
 * @attr: Unused.
 * @buf: Data buffer.
 * @count: Size of the data buffer.
 *
 * Description:
 * If val is in a valid range then set the adapter's link speed field and
 * issue a lip; if the lip fails reset the link speed to the old value.
 *
 * Notes:
 * If the value is not in range log a kernel error message and return an error.
 *
 * Returns:
 * zero if val is in range and lip okay.
 * non-zero return value from lpfc_issue_lip()
 * -EINVAL val out of range
 **/
static ssize_t
lpfc_link_speed_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 val = LPFC_USER_LINK_SPEED_AUTO;
        int nolip = 0;
        const char *val_buf = buf;
        int err;
        uint32_t prev_val, if_type;

        if_type = bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf);
        if (if_type >= LPFC_SLI_INTF_IF_TYPE_2 &&
            phba->hba_flag & HBA_FORCED_LINK_SPEED)
                return -EPERM;

        if (!strncmp(buf, "nolip ", strlen("nolip "))) {
                nolip = 1;
                val_buf = &buf[strlen("nolip ")];
        }

        if (!isdigit(val_buf[0]))
                return -EINVAL;
        if (sscanf(val_buf, "%i", &val) != 1)
                return -EINVAL;

        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                "3055 lpfc_link_speed changed from %d to %d %s\n",
                phba->cfg_link_speed, val, nolip ? "(nolip)" : "(lip)");

        if (((val == LPFC_USER_LINK_SPEED_1G) && !(phba->lmt & LMT_1Gb)) ||
            ((val == LPFC_USER_LINK_SPEED_2G) && !(phba->lmt & LMT_2Gb)) ||
            ((val == LPFC_USER_LINK_SPEED_4G) && !(phba->lmt & LMT_4Gb)) ||
            ((val == LPFC_USER_LINK_SPEED_8G) && !(phba->lmt & LMT_8Gb)) ||
            ((val == LPFC_USER_LINK_SPEED_10G) && !(phba->lmt & LMT_10Gb)) ||
            ((val == LPFC_USER_LINK_SPEED_16G) && !(phba->lmt & LMT_16Gb)) ||
            ((val == LPFC_USER_LINK_SPEED_32G) && !(phba->lmt & LMT_32Gb)) ||
            ((val == LPFC_USER_LINK_SPEED_64G) && !(phba->lmt & LMT_64Gb))) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "2879 lpfc_link_speed attribute cannot be set "
                                "to %d. Speed is not supported by this port.\n",
                                val);
                return -EINVAL;
        }
        if (val >= LPFC_USER_LINK_SPEED_16G &&
            phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "3112 lpfc_link_speed attribute cannot be set "
                                "to %d. Speed is not supported in loop mode.\n",
                                val);
                return -EINVAL;
        }

        switch (val) {
        case LPFC_USER_LINK_SPEED_AUTO:
        case LPFC_USER_LINK_SPEED_1G:
        case LPFC_USER_LINK_SPEED_2G:
        case LPFC_USER_LINK_SPEED_4G:
        case LPFC_USER_LINK_SPEED_8G:
        case LPFC_USER_LINK_SPEED_16G:
        case LPFC_USER_LINK_SPEED_32G:
        case LPFC_USER_LINK_SPEED_64G:
                prev_val = phba->cfg_link_speed;
                phba->cfg_link_speed = val;
                if (nolip)
                        return strlen(buf);

                err = lpfc_issue_lip(lpfc_shost_from_vport(phba->pport));
                if (err) {
                        phba->cfg_link_speed = prev_val;
                        return -EINVAL;
                }
                return strlen(buf);
        default:
                break;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0469 lpfc_link_speed attribute cannot be set to %d, "
                        "allowed values are [%s]\n",
                        val, LPFC_LINK_SPEED_STRING);
        return -EINVAL;

}

static int lpfc_link_speed = 0;
module_param(lpfc_link_speed, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_link_speed, "Select link speed");
lpfc_param_show(link_speed)

/**
 * lpfc_link_speed_init - Set the adapters link speed
 * @phba: lpfc_hba pointer.
 * @val: link speed value.
 *
 * Description:
 * If val is in a valid range then set the adapter's link speed field.
 *
 * Notes:
 * If the value is not in range log a kernel error message, clear the link
 * speed and return an error.
 *
 * Returns:
 * zero if val saved.
 * -EINVAL val out of range
 **/
static int
lpfc_link_speed_init(struct lpfc_hba *phba, int val)
{
        if (val >= LPFC_USER_LINK_SPEED_16G && phba->cfg_topology == 4) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "3111 lpfc_link_speed of %d cannot "
                        "support loop mode, setting topology to default.\n",
                         val);
                phba->cfg_topology = 0;
        }

        switch (val) {
        case LPFC_USER_LINK_SPEED_AUTO:
        case LPFC_USER_LINK_SPEED_1G:
        case LPFC_USER_LINK_SPEED_2G:
        case LPFC_USER_LINK_SPEED_4G:
        case LPFC_USER_LINK_SPEED_8G:
        case LPFC_USER_LINK_SPEED_16G:
        case LPFC_USER_LINK_SPEED_32G:
        case LPFC_USER_LINK_SPEED_64G:
                phba->cfg_link_speed = val;
                return 0;
        default:
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "0405 lpfc_link_speed attribute cannot "
                                "be set to %d, allowed values are "
                                "["LPFC_LINK_SPEED_STRING"]\n", val);
                phba->cfg_link_speed = LPFC_USER_LINK_SPEED_AUTO;
                return -EINVAL;
        }
}

static DEVICE_ATTR_RW(lpfc_link_speed);

/*
# lpfc_aer_support: Support PCIe device Advanced Error Reporting (AER)
#       0  = aer disabled or not supported
#       1  = aer supported and enabled (default)
# Value range is [0,1]. Default value is 1.
*/
LPFC_ATTR(aer_support, 1, 0, 1,
        "Enable PCIe device AER support");
lpfc_param_show(aer_support)

/**
 * lpfc_aer_support_store - Set the adapter for aer support
 *
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing enable or disable aer flag.
 * @count: unused variable.
 *
 * Description:
 * If the val is 1 and currently the device's AER capability was not
 * enabled, invoke the kernel's enable AER helper routine, trying to
 * enable the device's AER capability. If the helper routine enabling
 * AER returns success, update the device's cfg_aer_support flag to
 * indicate AER is supported by the device; otherwise, if the device
 * AER capability is already enabled to support AER, then do nothing.
 *
 * If the val is 0 and currently the device's AER support was enabled,
 * invoke the kernel's disable AER helper routine. After that, update
 * the device's cfg_aer_support flag to indicate AER is not supported
 * by the device; otherwise, if the device AER capability is already
 * disabled from supporting AER, then do nothing.
 *
 * Returns:
 * length of the buf on success if val is in range the intended mode
 * is supported.
 * -EINVAL if val out of range or intended mode is not supported.
 **/
static ssize_t
lpfc_aer_support_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 val = 0, rc = -EINVAL;

        if (!isdigit(buf[0]))
                return -EINVAL;
        if (sscanf(buf, "%i", &val) != 1)
                return -EINVAL;

        switch (val) {
        case 0:
                if (phba->hba_flag & HBA_AER_ENABLED) {
                        rc = pci_disable_pcie_error_reporting(phba->pcidev);
                        if (!rc) {
                                spin_lock_irq(&phba->hbalock);
                                phba->hba_flag &= ~HBA_AER_ENABLED;
                                spin_unlock_irq(&phba->hbalock);
                                phba->cfg_aer_support = 0;
                                rc = strlen(buf);
                        } else
                                rc = -EPERM;
                } else {
                        phba->cfg_aer_support = 0;
                        rc = strlen(buf);
                }
                break;
        case 1:
                if (!(phba->hba_flag & HBA_AER_ENABLED)) {
                        rc = pci_enable_pcie_error_reporting(phba->pcidev);
                        if (!rc) {
                                spin_lock_irq(&phba->hbalock);
                                phba->hba_flag |= HBA_AER_ENABLED;
                                spin_unlock_irq(&phba->hbalock);
                                phba->cfg_aer_support = 1;
                                rc = strlen(buf);
                        } else
                                 rc = -EPERM;
                } else {
                        phba->cfg_aer_support = 1;
                        rc = strlen(buf);
                }
                break;
        default:
                rc = -EINVAL;
                break;
        }
        return rc;
}

static DEVICE_ATTR_RW(lpfc_aer_support);

/**
 * lpfc_aer_cleanup_state - Clean up aer state to the aer enabled device
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing flag 1 for aer cleanup state.
 * @count: unused variable.
 *
 * Description:
 * If the @buf contains 1 and the device currently has the AER support
 * enabled, then invokes the kernel AER helper routine
 * pci_aer_clear_nonfatal_status() to clean up the uncorrectable
 * error status register.
 *
 * Notes:
 *
 * Returns:
 * -EINVAL if the buf does not contain the 1 or the device is not currently
 * enabled with the AER support.
 **/
static ssize_t
lpfc_aer_cleanup_state(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 val, rc = -1;

        if (!isdigit(buf[0]))
                return -EINVAL;
        if (sscanf(buf, "%i", &val) != 1)
                return -EINVAL;
        if (val != 1)
                return -EINVAL;

        if (phba->hba_flag & HBA_AER_ENABLED)
                rc = pci_aer_clear_nonfatal_status(phba->pcidev);

        if (rc == 0)
                return strlen(buf);
        else
                return -EPERM;
}

static DEVICE_ATTR(lpfc_aer_state_cleanup, S_IWUSR, NULL,
                   lpfc_aer_cleanup_state);

/**
 * lpfc_sriov_nr_virtfn_store - Enable the adapter for sr-iov virtual functions
 *
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing the string the number of vfs to be enabled.
 * @count: unused variable.
 *
 * Description:
 * When this api is called either through user sysfs, the driver shall
 * try to enable or disable SR-IOV virtual functions according to the
 * following:
 *
 * If zero virtual function has been enabled to the physical function,
 * the driver shall invoke the pci enable virtual function api trying
 * to enable the virtual functions. If the nr_vfn provided is greater
 * than the maximum supported, the maximum virtual function number will
 * be used for invoking the api; otherwise, the nr_vfn provided shall
 * be used for invoking the api. If the api call returned success, the
 * actual number of virtual functions enabled will be set to the driver
 * cfg_sriov_nr_virtfn; otherwise, -EINVAL shall be returned and driver
 * cfg_sriov_nr_virtfn remains zero.
 *
 * If none-zero virtual functions have already been enabled to the
 * physical function, as reflected by the driver's cfg_sriov_nr_virtfn,
 * -EINVAL will be returned and the driver does nothing;
 *
 * If the nr_vfn provided is zero and none-zero virtual functions have
 * been enabled, as indicated by the driver's cfg_sriov_nr_virtfn, the
 * disabling virtual function api shall be invoded to disable all the
 * virtual functions and driver's cfg_sriov_nr_virtfn shall be set to
 * zero. Otherwise, if zero virtual function has been enabled, do
 * nothing.
 *
 * Returns:
 * length of the buf on success if val is in range the intended mode
 * is supported.
 * -EINVAL if val out of range or intended mode is not supported.
 **/
static ssize_t
lpfc_sriov_nr_virtfn_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 pci_dev *pdev = phba->pcidev;
        int val = 0, rc = -EINVAL;

        /* Sanity check on user data */
        if (!isdigit(buf[0]))
                return -EINVAL;
        if (sscanf(buf, "%i", &val) != 1)
                return -EINVAL;
        if (val < 0)
                return -EINVAL;

        /* Request disabling virtual functions */
        if (val == 0) {
                if (phba->cfg_sriov_nr_virtfn > 0) {
                        pci_disable_sriov(pdev);
                        phba->cfg_sriov_nr_virtfn = 0;
                }
                return strlen(buf);
        }

        /* Request enabling virtual functions */
        if (phba->cfg_sriov_nr_virtfn > 0) {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "3018 There are %d virtual functions "
                                "enabled on physical function.\n",
                                phba->cfg_sriov_nr_virtfn);
                return -EEXIST;
        }

        if (val <= LPFC_MAX_VFN_PER_PFN)
                phba->cfg_sriov_nr_virtfn = val;
        else {
                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                "3019 Enabling %d virtual functions is not "
                                "allowed.\n", val);
                return -EINVAL;
        }

        rc = lpfc_sli_probe_sriov_nr_virtfn(phba, phba->cfg_sriov_nr_virtfn);
        if (rc) {
                phba->cfg_sriov_nr_virtfn = 0;
                rc = -EPERM;
        } else
                rc = strlen(buf);

        return rc;
}

LPFC_ATTR(sriov_nr_virtfn, LPFC_DEF_VFN_PER_PFN, 0, LPFC_MAX_VFN_PER_PFN,
        "Enable PCIe device SR-IOV virtual fn");

lpfc_param_show(sriov_nr_virtfn)
static DEVICE_ATTR_RW(lpfc_sriov_nr_virtfn);

/**
 * lpfc_request_firmware_store - Request for Linux generic firmware upgrade
 *
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: containing the string the number of vfs to be enabled.
 * @count: unused variable.
 *
 * Description:
 *
 * Returns:
 * length of the buf on success if val is in range the intended mode
 * is supported.
 * -EINVAL if val out of range or intended mode is not supported.
 **/
static ssize_t
lpfc_request_firmware_upgrade_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 val = 0, rc;

        /* Sanity check on user data */
        if (!isdigit(buf[0]))
                return -EINVAL;
        if (sscanf(buf, "%i", &val) != 1)
                return -EINVAL;
        if (val != 1)
                return -EINVAL;

        rc = lpfc_sli4_request_firmware_update(phba, RUN_FW_UPGRADE);
        if (rc)
                rc = -EPERM;
        else
                rc = strlen(buf);
        return rc;
}

static int lpfc_req_fw_upgrade;
module_param(lpfc_req_fw_upgrade, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lpfc_req_fw_upgrade, "Enable Linux generic firmware upgrade");
lpfc_param_show(request_firmware_upgrade)

/**
 * lpfc_request_firmware_upgrade_init - Enable initial linux generic fw upgrade
 * @phba: lpfc_hba pointer.
 * @val: 0 or 1.
 *
 * Description:
 * Set the initial Linux generic firmware upgrade enable or disable flag.
 *
 * Returns:
 * zero if val saved.
 * -EINVAL val out of range
 **/
static int
lpfc_request_firmware_upgrade_init(struct lpfc_hba *phba, int val)
{
        if (val >= 0 && val <= 1) {
                phba->cfg_request_firmware_upgrade = val;
                return 0;
        }
        return -EINVAL;
}
static DEVICE_ATTR(lpfc_req_fw_upgrade, S_IRUGO | S_IWUSR,
                   lpfc_request_firmware_upgrade_show,
                   lpfc_request_firmware_upgrade_store);

/**
 * lpfc_force_rscn_store
 *
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: unused string
 * @count: unused variable.
 *
 * Description:
 * Force the switch to send a RSCN to all other NPorts in our zone
 * If we are direct connect pt2pt, build the RSCN command ourself
 * and send to the other NPort. Not supported for private loop.
 *
 * Returns:
 * 0      - on success
 * -EIO   - if command is not sent
 **/
static ssize_t
lpfc_force_rscn_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;
        int i;

        i = lpfc_issue_els_rscn(vport, 0);
        if (i)
                return -EIO;
        return strlen(buf);
}

/*
 * lpfc_force_rscn: Force an RSCN to be sent to all remote NPorts
 * connected to  the HBA.
 *
 * Value range is any ascii value
 */
static int lpfc_force_rscn;
module_param(lpfc_force_rscn, int, 0644);
MODULE_PARM_DESC(lpfc_force_rscn,
                 "Force an RSCN to be sent to all remote NPorts");
lpfc_param_show(force_rscn)

/**
 * lpfc_force_rscn_init - Force an RSCN to be sent to all remote NPorts
 * @phba: lpfc_hba pointer.
 * @val: unused value.
 *
 * Returns:
 * zero if val saved.
 **/
static int
lpfc_force_rscn_init(struct lpfc_hba *phba, int val)
{
        return 0;
}
static DEVICE_ATTR_RW(lpfc_force_rscn);

/**
 * lpfc_fcp_imax_store
 *
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: string with the number of fast-path FCP interrupts per second.
 * @count: unused variable.
 *
 * Description:
 * If val is in a valid range [636,651042], then set the adapter's
 * maximum number of fast-path FCP interrupts per second.
 *
 * Returns:
 * length of the buf on success if val is in range the intended mode
 * is supported.
 * -EINVAL if val out of range or intended mode is not supported.
 **/
static ssize_t
lpfc_fcp_imax_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 lpfc_eq_intr_info *eqi;
        uint32_t usdelay;
        int val = 0, i;

        /* fcp_imax is only valid for SLI4 */
        if (phba->sli_rev != LPFC_SLI_REV4)
                return -EINVAL;

        /* Sanity check on user data */
        if (!isdigit(buf[0]))
                return -EINVAL;
        if (sscanf(buf, "%i", &val) != 1)
                return -EINVAL;

        /*
         * Value range for the HBA is [5000,5000000]
         * The value for each EQ depends on how many EQs are configured.
         * Allow value == 0
         */
        if (val && (val < LPFC_MIN_IMAX || val > LPFC_MAX_IMAX))
                return -EINVAL;

        phba->cfg_auto_imax = (val) ? 0 : 1;
        if (phba->cfg_fcp_imax && !val) {
                queue_delayed_work(phba->wq, &phba->eq_delay_work,
                                   msecs_to_jiffies(LPFC_EQ_DELAY_MSECS));

                for_each_present_cpu(i) {
                        eqi = per_cpu_ptr(phba->sli4_hba.eq_info, i);
                        eqi->icnt = 0;
                }
        }

        phba->cfg_fcp_imax = (uint32_t)val;

        if (phba->cfg_fcp_imax)
                usdelay = LPFC_SEC_TO_USEC / phba->cfg_fcp_imax;
        else
                usdelay = 0;

        for (i = 0; i < phba->cfg_irq_chann; i += LPFC_MAX_EQ_DELAY_EQID_CNT)
                lpfc_modify_hba_eq_delay(phba, i, LPFC_MAX_EQ_DELAY_EQID_CNT,
                                         usdelay);

        return strlen(buf);
}

/*
# lpfc_fcp_imax: The maximum number of fast-path FCP interrupts per second
# for the HBA.
#
# Value range is [5,000 to 5,000,000]. Default value is 50,000.
*/
static int lpfc_fcp_imax = LPFC_DEF_IMAX;
module_param(lpfc_fcp_imax, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lpfc_fcp_imax,
            "Set the maximum number of FCP interrupts per second per HBA");
lpfc_param_show(fcp_imax)

/**
 * lpfc_fcp_imax_init - Set the initial sr-iov virtual function enable
 * @phba: lpfc_hba pointer.
 * @val: link speed value.
 *
 * Description:
 * If val is in a valid range [636,651042], then initialize the adapter's
 * maximum number of fast-path FCP interrupts per second.
 *
 * Returns:
 * zero if val saved.
 * -EINVAL val out of range
 **/
static int
lpfc_fcp_imax_init(struct lpfc_hba *phba, int val)
{
        if (phba->sli_rev != LPFC_SLI_REV4) {
                phba->cfg_fcp_imax = 0;
                return 0;
        }

        if ((val >= LPFC_MIN_IMAX && val <= LPFC_MAX_IMAX) ||
            (val == 0)) {
                phba->cfg_fcp_imax = val;
                return 0;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "3016 lpfc_fcp_imax: %d out of range, using default\n",
                        val);
        phba->cfg_fcp_imax = LPFC_DEF_IMAX;

        return 0;
}

static DEVICE_ATTR_RW(lpfc_fcp_imax);

/**
 * lpfc_cq_max_proc_limit_store
 *
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: string with the cq max processing limit of cqes
 * @count: unused variable.
 *
 * Description:
 * If val is in a valid range, then set value on each cq
 *
 * Returns:
 * The length of the buf: if successful
 * -ERANGE: if val is not in the valid range
 * -EINVAL: if bad value format or intended mode is not supported.
 **/
static ssize_t
lpfc_cq_max_proc_limit_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 lpfc_queue *eq, *cq;
        unsigned long val;
        int i;

        /* cq_max_proc_limit is only valid for SLI4 */
        if (phba->sli_rev != LPFC_SLI_REV4)
                return -EINVAL;

        /* Sanity check on user data */
        if (!isdigit(buf[0]))
                return -EINVAL;
        if (kstrtoul(buf, 0, &val))
                return -EINVAL;

        if (val < LPFC_CQ_MIN_PROC_LIMIT || val > LPFC_CQ_MAX_PROC_LIMIT)
                return -ERANGE;

        phba->cfg_cq_max_proc_limit = (uint32_t)val;

        /* set the values on the cq's */
        for (i = 0; i < phba->cfg_irq_chann; i++) {
                /* Get the EQ corresponding to the IRQ vector */
                eq = phba->sli4_hba.hba_eq_hdl[i].eq;
                if (!eq)
                        continue;

                list_for_each_entry(cq, &eq->child_list, list)
                        cq->max_proc_limit = min(phba->cfg_cq_max_proc_limit,
                                                 cq->entry_count);
        }

        return strlen(buf);
}

/*
 * lpfc_cq_max_proc_limit: The maximum number CQE entries processed in an
 *   itteration of CQ processing.
 */
static int lpfc_cq_max_proc_limit = LPFC_CQ_DEF_MAX_PROC_LIMIT;
module_param(lpfc_cq_max_proc_limit, int, 0644);
MODULE_PARM_DESC(lpfc_cq_max_proc_limit,
            "Set the maximum number CQEs processed in an iteration of "
            "CQ processing");
lpfc_param_show(cq_max_proc_limit)

/*
 * lpfc_cq_poll_threshold: Set the threshold of CQE completions in a
 *   single handler call which should request a polled completion rather
 *   than re-enabling interrupts.
 */
LPFC_ATTR_RW(cq_poll_threshold, LPFC_CQ_DEF_THRESHOLD_TO_POLL,
             LPFC_CQ_MIN_THRESHOLD_TO_POLL,
             LPFC_CQ_MAX_THRESHOLD_TO_POLL,
             "CQE Processing Threshold to enable Polling");

/**
 * lpfc_cq_max_proc_limit_init - Set the initial cq max_proc_limit
 * @phba: lpfc_hba pointer.
 * @val: entry limit
 *
 * Description:
 * If val is in a valid range, then initialize the adapter's maximum
 * value.
 *
 * Returns:
 *  Always returns 0 for success, even if value not always set to
 *  requested value. If value out of range or not supported, will fall
 *  back to default.
 **/
static int
lpfc_cq_max_proc_limit_init(struct lpfc_hba *phba, int val)
{
        phba->cfg_cq_max_proc_limit = LPFC_CQ_DEF_MAX_PROC_LIMIT;

        if (phba->sli_rev != LPFC_SLI_REV4)
                return 0;

        if (val >= LPFC_CQ_MIN_PROC_LIMIT && val <= LPFC_CQ_MAX_PROC_LIMIT) {
                phba->cfg_cq_max_proc_limit = val;
                return 0;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0371 "LPFC_DRIVER_NAME"_cq_max_proc_limit: "
                        "%d out of range, using default\n",
                        phba->cfg_cq_max_proc_limit);

        return 0;
}

static DEVICE_ATTR_RW(lpfc_cq_max_proc_limit);

/**
 * lpfc_state_show - Display current driver CPU affinity
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains text describing the state of the link.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_fcp_cpu_map_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;
        struct lpfc_vector_map_info *cpup;
        int  len = 0;

        if ((phba->sli_rev != LPFC_SLI_REV4) ||
            (phba->intr_type != MSIX))
                return len;

        switch (phba->cfg_fcp_cpu_map) {
        case 0:
                len += scnprintf(buf + len, PAGE_SIZE-len,
                                "fcp_cpu_map: No mapping (%d)\n",
                                phba->cfg_fcp_cpu_map);
                return len;
        case 1:
                len += scnprintf(buf + len, PAGE_SIZE-len,
                                "fcp_cpu_map: HBA centric mapping (%d): "
                                "%d of %d CPUs online from %d possible CPUs\n",
                                phba->cfg_fcp_cpu_map, num_online_cpus(),
                                num_present_cpus(),
                                phba->sli4_hba.num_possible_cpu);
                break;
        }

        while (phba->sli4_hba.curr_disp_cpu <
               phba->sli4_hba.num_possible_cpu) {
                cpup = &phba->sli4_hba.cpu_map[phba->sli4_hba.curr_disp_cpu];

                if (!cpu_present(phba->sli4_hba.curr_disp_cpu))
                        len += scnprintf(buf + len, PAGE_SIZE - len,
                                        "CPU %02d not present\n",
                                        phba->sli4_hba.curr_disp_cpu);
                else if (cpup->eq == LPFC_VECTOR_MAP_EMPTY) {
                        if (cpup->hdwq == LPFC_VECTOR_MAP_EMPTY)
                                len += scnprintf(
                                        buf + len, PAGE_SIZE - len,
                                        "CPU %02d hdwq None "
                                        "physid %d coreid %d ht %d ua %d\n",
                                        phba->sli4_hba.curr_disp_cpu,
                                        cpup->phys_id, cpup->core_id,
                                        (cpup->flag & LPFC_CPU_MAP_HYPER),
                                        (cpup->flag & LPFC_CPU_MAP_UNASSIGN));
                        else
                                len += scnprintf(
                                        buf + len, PAGE_SIZE - len,
                                        "CPU %02d EQ None hdwq %04d "
                                        "physid %d coreid %d ht %d ua %d\n",
                                        phba->sli4_hba.curr_disp_cpu,
                                        cpup->hdwq, cpup->phys_id,
                                        cpup->core_id,
                                        (cpup->flag & LPFC_CPU_MAP_HYPER),
                                        (cpup->flag & LPFC_CPU_MAP_UNASSIGN));
                } else {
                        if (cpup->hdwq == LPFC_VECTOR_MAP_EMPTY)
                                len += scnprintf(
                                        buf + len, PAGE_SIZE - len,
                                        "CPU %02d hdwq None "
                                        "physid %d coreid %d ht %d ua %d IRQ %d\n",
                                        phba->sli4_hba.curr_disp_cpu,
                                        cpup->phys_id,
                                        cpup->core_id,
                                        (cpup->flag & LPFC_CPU_MAP_HYPER),
                                        (cpup->flag & LPFC_CPU_MAP_UNASSIGN),
                                        lpfc_get_irq(cpup->eq));
                        else
                                len += scnprintf(
                                        buf + len, PAGE_SIZE - len,
                                        "CPU %02d EQ %04d hdwq %04d "
                                        "physid %d coreid %d ht %d ua %d IRQ %d\n",
                                        phba->sli4_hba.curr_disp_cpu,
                                        cpup->eq, cpup->hdwq, cpup->phys_id,
                                        cpup->core_id,
                                        (cpup->flag & LPFC_CPU_MAP_HYPER),
                                        (cpup->flag & LPFC_CPU_MAP_UNASSIGN),
                                        lpfc_get_irq(cpup->eq));
                }

                phba->sli4_hba.curr_disp_cpu++;

                /* display max number of CPUs keeping some margin */
                if (phba->sli4_hba.curr_disp_cpu <
                                phba->sli4_hba.num_possible_cpu &&
                                (len >= (PAGE_SIZE - 64))) {
                        len += scnprintf(buf + len,
                                        PAGE_SIZE - len, "more...\n");
                        break;
                }
        }

        if (phba->sli4_hba.curr_disp_cpu == phba->sli4_hba.num_possible_cpu)
                phba->sli4_hba.curr_disp_cpu = 0;

        return len;
}

/**
 * lpfc_fcp_cpu_map_store - Change CPU affinity of driver vectors
 * @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  - Not implemented yet.
 **/
static ssize_t
lpfc_fcp_cpu_map_store(struct device *dev, struct device_attribute *attr,
                       const char *buf, size_t count)
{
        return -EINVAL;
}

/*
# lpfc_fcp_cpu_map: Defines how to map CPUs to IRQ vectors
# for the HBA.
#
# Value range is [0 to 1]. Default value is LPFC_HBA_CPU_MAP (1).
#       0 - Do not affinitze IRQ vectors
#       1 - Affintize HBA vectors with respect to each HBA
#           (start with CPU0 for each HBA)
# This also defines how Hardware Queues are mapped to specific CPUs.
*/
static int lpfc_fcp_cpu_map = LPFC_HBA_CPU_MAP;
module_param(lpfc_fcp_cpu_map, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(lpfc_fcp_cpu_map,
                 "Defines how to map CPUs to IRQ vectors per HBA");

/**
 * lpfc_fcp_cpu_map_init - Set the initial sr-iov virtual function enable
 * @phba: lpfc_hba pointer.
 * @val: link speed value.
 *
 * Description:
 * If val is in a valid range [0-2], then affinitze the adapter's
 * MSIX vectors.
 *
 * Returns:
 * zero if val saved.
 * -EINVAL val out of range
 **/
static int
lpfc_fcp_cpu_map_init(struct lpfc_hba *phba, int val)
{
        if (phba->sli_rev != LPFC_SLI_REV4) {
                phba->cfg_fcp_cpu_map = 0;
                return 0;
        }

        if (val >= LPFC_MIN_CPU_MAP && val <= LPFC_MAX_CPU_MAP) {
                phba->cfg_fcp_cpu_map = val;
                return 0;
        }

        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "3326 lpfc_fcp_cpu_map: %d out of range, using "
                        "default\n", val);
        phba->cfg_fcp_cpu_map = LPFC_HBA_CPU_MAP;

        return 0;
}

static DEVICE_ATTR_RW(lpfc_fcp_cpu_map);

/*
# lpfc_fcp_class:  Determines FC class to use for the FCP protocol.
# Value range is [2,3]. Default value is 3.
*/
LPFC_VPORT_ATTR_R(fcp_class, 3, 2, 3,
                  "Select Fibre Channel class of service for FCP sequences");

/*
# lpfc_use_adisc: Use ADISC for FCP rediscovery instead of PLOGI. Value range
# is [0,1]. Default value is 0.
*/
LPFC_VPORT_ATTR_RW(use_adisc, 0, 0, 1,
                   "Use ADISC on rediscovery to authenticate FCP devices");

/*
# lpfc_first_burst_size: First burst size to use on the NPorts
# that support first burst.
# Value range is [0,65536]. Default value is 0.
*/
LPFC_VPORT_ATTR_RW(first_burst_size, 0, 0, 65536,
                   "First burst size for Targets that support first burst");

/*
* lpfc_nvmet_fb_size: NVME Target mode supported first burst size.
* When the driver is configured as an NVME target, this value is
* communicated to the NVME initiator in the PRLI response.  It is
* used only when the lpfc_nvme_enable_fb and lpfc_nvmet_support
* parameters are set and the target is sending the PRLI RSP.
* Parameter supported on physical port only - no NPIV support.
* Value range is [0,65536]. Default value is 0.
*/
LPFC_ATTR_RW(nvmet_fb_size, 0, 0, 65536,
             "NVME Target mode first burst size in 512B increments.");

/*
 * lpfc_nvme_enable_fb: Enable NVME first burst on I and T functions.
 * For the Initiator (I), enabling this parameter means that an NVMET
 * PRLI response with FBA enabled and an FB_SIZE set to a nonzero value will be
 * processed by the initiator for subsequent NVME FCP IO.
 * Currently, this feature is not supported on the NVME target
 * Value range is [0,1]. Default value is 0 (disabled).
 */
LPFC_ATTR_RW(nvme_enable_fb, 0, 0, 1,
             "Enable First Burst feature for NVME Initiator.");

/*
# lpfc_max_scsicmpl_time: Use scsi command completion time to control I/O queue
# depth. Default value is 0. When the value of this parameter is zero the
# SCSI command completion time is not used for controlling I/O queue depth. When
# the parameter is set to a non-zero value, the I/O queue depth is controlled
# to limit the I/O completion time to the parameter value.
# The value is set in milliseconds.
*/
LPFC_VPORT_ATTR(max_scsicmpl_time, 0, 0, 60000,
        "Use command completion time to control queue depth");

lpfc_vport_param_show(max_scsicmpl_time);
static int
lpfc_max_scsicmpl_time_set(struct lpfc_vport *vport, int val)
{
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
        struct lpfc_nodelist *ndlp, *next_ndlp;

        if (val == vport->cfg_max_scsicmpl_time)
                return 0;
        if ((val < 0) || (val > 60000))
                return -EINVAL;
        vport->cfg_max_scsicmpl_time = val;

        spin_lock_irq(shost->host_lock);
        list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
                if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
                        continue;
                ndlp->cmd_qdepth = vport->cfg_tgt_queue_depth;
        }
        spin_unlock_irq(shost->host_lock);
        return 0;
}
lpfc_vport_param_store(max_scsicmpl_time);
static DEVICE_ATTR_RW(lpfc_max_scsicmpl_time);

/*
# lpfc_ack0: Use ACK0, instead of ACK1 for class 2 acknowledgement. Value
# range is [0,1]. Default value is 0.
*/
LPFC_ATTR_R(ack0, 0, 0, 1, "Enable ACK0 support");

/*
# lpfc_xri_rebalancing: enable or disable XRI rebalancing feature
# range is [0,1]. Default value is 1.
*/
LPFC_ATTR_R(xri_rebalancing, 1, 0, 1, "Enable/Disable XRI rebalancing");

/*
 * lpfc_io_sched: Determine scheduling algrithmn for issuing FCP cmds
 * range is [0,1]. Default value is 0.
 * For [0], FCP commands are issued to Work Queues based on upper layer
 * hardware queue index.
 * For [1], FCP commands are issued to a Work Queue associated with the
 *          current CPU.
 *
 * LPFC_FCP_SCHED_BY_HDWQ == 0
 * LPFC_FCP_SCHED_BY_CPU == 1
 *
 * The driver dynamically sets this to 1 (BY_CPU) if it's able to set up cpu
 * affinity for FCP/NVME I/Os through Work Queues associated with the current
 * CPU. Otherwise, the default 0 (Round Robin) scheduling of FCP/NVME I/Os
 * through WQs will be used.
 */
LPFC_ATTR_RW(fcp_io_sched, LPFC_FCP_SCHED_BY_CPU,
             LPFC_FCP_SCHED_BY_HDWQ,
             LPFC_FCP_SCHED_BY_CPU,
             "Determine scheduling algorithm for "
             "issuing commands [0] - Hardware Queue, [1] - Current CPU");

/*
 * lpfc_ns_query: Determine algrithmn for NameServer queries after RSCN
 * range is [0,1]. Default value is 0.
 * For [0], GID_FT is used for NameServer queries after RSCN (default)
 * For [1], GID_PT is used for NameServer queries after RSCN
 *
 */
LPFC_ATTR_RW(ns_query, LPFC_NS_QUERY_GID_FT,
             LPFC_NS_QUERY_GID_FT, LPFC_NS_QUERY_GID_PT,
             "Determine algorithm NameServer queries after RSCN "
             "[0] - GID_FT, [1] - GID_PT");

/*
# lpfc_fcp2_no_tgt_reset: Determine bus reset behavior
# range is [0,1]. Default value is 0.
# For [0], bus reset issues target reset to ALL devices
# For [1], bus reset issues target reset to non-FCP2 devices
*/
LPFC_ATTR_RW(fcp2_no_tgt_reset, 0, 0, 1, "Determine bus reset behavior for "
             "FCP2 devices [0] - issue tgt reset, [1] - no tgt reset");


/*
# lpfc_cr_delay & lpfc_cr_count: Default values for I/O colaesing
# cr_delay (msec) or cr_count outstanding commands. cr_delay can take
# value [0,63]. cr_count can take value [1,255]. Default value of cr_delay
# is 0. Default value of cr_count is 1. The cr_count feature is disabled if
# cr_delay is set to 0.
*/
LPFC_ATTR_RW(cr_delay, 0, 0, 63, "A count of milliseconds after which an "
                "interrupt response is generated");

LPFC_ATTR_RW(cr_count, 1, 1, 255, "A count of I/O completions after which an "
                "interrupt response is generated");

/*
# lpfc_multi_ring_support:  Determines how many rings to spread available
# cmd/rsp IOCB entries across.
# Value range is [1,2]. Default value is 1.
*/
LPFC_ATTR_R(multi_ring_support, 1, 1, 2, "Determines number of primary "
                "SLI rings to spread IOCB entries across");

/*
# lpfc_multi_ring_rctl:  If lpfc_multi_ring_support is enabled, this
# identifies what rctl value to configure the additional ring for.
# Value range is [1,0xff]. Default value is 4 (Unsolicated Data).
*/
LPFC_ATTR_R(multi_ring_rctl, FC_RCTL_DD_UNSOL_DATA, 1,
             255, "Identifies RCTL for additional ring configuration");

/*
# lpfc_multi_ring_type:  If lpfc_multi_ring_support is enabled, this
# identifies what type value to configure the additional ring for.
# Value range is [1,0xff]. Default value is 5 (LLC/SNAP).
*/
LPFC_ATTR_R(multi_ring_type, FC_TYPE_IP, 1,
             255, "Identifies TYPE for additional ring configuration");

/*
# lpfc_enable_SmartSAN: Sets up FDMI support for SmartSAN
#       0  = SmartSAN functionality disabled (default)
#       1  = SmartSAN functionality enabled
# This parameter will override the value of lpfc_fdmi_on module parameter.
# Value range is [0,1]. Default value is 0.
*/
LPFC_ATTR_R(enable_SmartSAN, 0, 0, 1, "Enable SmartSAN functionality");

/*
# lpfc_fdmi_on: Controls FDMI support.
#       0       No FDMI support
#       1       Traditional FDMI support (default)
# Traditional FDMI support means the driver will assume FDMI-2 support;
# however, if that fails, it will fallback to FDMI-1.
# If lpfc_enable_SmartSAN is set to 1, the driver ignores lpfc_fdmi_on.
# If lpfc_enable_SmartSAN is set 0, the driver uses the current value of
# lpfc_fdmi_on.
# Value range [0,1]. Default value is 1.
*/
LPFC_ATTR_R(fdmi_on, 1, 0, 1, "Enable FDMI support");

/*
# Specifies the maximum number of ELS cmds we can have outstanding (for
# discovery). Value range is [1,64]. Default value = 32.
*/
LPFC_VPORT_ATTR(discovery_threads, 32, 1, 64, "Maximum number of ELS commands "
                 "during discovery");

/*
# lpfc_max_luns: maximum allowed LUN ID. This is the highest LUN ID that
#    will be scanned by the SCSI midlayer when sequential scanning is
#    used; and is also the highest LUN ID allowed when the SCSI midlayer
#    parses REPORT_LUN responses. The lpfc driver has no LUN count or
#    LUN ID limit, but the SCSI midlayer requires this field for the uses
#    above. The lpfc driver limits the default value to 255 for two reasons.
#    As it bounds the sequential scan loop, scanning for thousands of luns
#    on a target can take minutes of wall clock time.  Additionally,
#    there are FC targets, such as JBODs, that only recognize 8-bits of
#    LUN ID. When they receive a value greater than 8 bits, they chop off
#    the high order bits. In other words, they see LUN IDs 0, 256, 512,
#    and so on all as LUN ID 0. This causes the linux kernel, which sees
#    valid responses at each of the LUN IDs, to believe there are multiple
#    devices present, when in fact, there is only 1.
#    A customer that is aware of their target behaviors, and the results as
#    indicated above, is welcome to increase the lpfc_max_luns value.
#    As mentioned, this value is not used by the lpfc driver, only the
#    SCSI midlayer.
# Value range is [0,65535]. Default value is 255.
# NOTE: The SCSI layer might probe all allowed LUN on some old targets.
*/
LPFC_VPORT_ULL_ATTR_R(max_luns, 255, 0, 65535, "Maximum allowed LUN ID");

/*
# lpfc_poll_tmo: .Milliseconds driver will wait between polling FCP ring.
# Value range is [1,255], default value is 10.
*/
LPFC_ATTR_RW(poll_tmo, 10, 1, 255,
             "Milliseconds driver will wait between polling FCP ring");

/*
# lpfc_task_mgmt_tmo: Maximum time to wait for task management commands
# to complete in seconds. Value range is [5,180], default value is 60.
*/
LPFC_ATTR_RW(task_mgmt_tmo, 60, 5, 180,
             "Maximum time to wait for task management commands to complete");
/*
# lpfc_use_msi: Use MSI (Message Signaled Interrupts) in systems that
#               support this feature
#       0  = MSI disabled
#       1  = MSI enabled
#       2  = MSI-X enabled (default)
# Value range is [0,2]. Default value is 2.
*/
LPFC_ATTR_R(use_msi, 2, 0, 2, "Use Message Signaled Interrupts (1) or "
            "MSI-X (2), if possible");

/*
 * lpfc_nvme_oas: Use the oas bit when sending NVME/NVMET IOs
 *
 *      0  = NVME OAS disabled
 *      1  = NVME OAS enabled
 *
 * Value range is [0,1]. Default value is 0.
 */
LPFC_ATTR_RW(nvme_oas, 0, 0, 1,
             "Use OAS bit on NVME IOs");

/*
 * lpfc_nvme_embed_cmd: Use the oas bit when sending NVME/NVMET IOs
 *
 *      0  = Put NVME Command in SGL
 *      1  = Embed NVME Command in WQE (unless G7)
 *      2 =  Embed NVME Command in WQE (force)
 *
 * Value range is [0,2]. Default value is 1.
 */
LPFC_ATTR_RW(nvme_embed_cmd, 1, 0, 2,
             "Embed NVME Command in WQE");

/*
 * lpfc_fcp_mq_threshold: Set the maximum number of Hardware Queues
 * the driver will advertise it supports to the SCSI layer.
 *
 *      0    = Set nr_hw_queues by the number of CPUs or HW queues.
 *      1,256 = Manually specify nr_hw_queue value to be advertised,
 *
 * Value range is [0,256]. Default value is 8.
 */
LPFC_ATTR_R(fcp_mq_threshold, LPFC_FCP_MQ_THRESHOLD_DEF,
            LPFC_FCP_MQ_THRESHOLD_MIN, LPFC_FCP_MQ_THRESHOLD_MAX,
            "Set the number of SCSI Queues advertised");

/*
 * lpfc_hdw_queue: Set the number of Hardware Queues the driver
 * will advertise it supports to the NVME and  SCSI layers. This also
 * will map to the number of CQ/WQ pairs the driver will create.
 *
 * The NVME Layer will try to create this many, plus 1 administrative
 * hardware queue. The administrative queue will always map to WQ 0
 * A hardware IO queue maps (qidx) to a specific driver CQ/WQ.
 *
 *      0    = Configure the number of hdw queues to the number of active CPUs.
 *      1,256 = Manually specify how many hdw queues to use.
 *
 * Value range is [0,256]. Default value is 0.
 */
LPFC_ATTR_R(hdw_queue,
            LPFC_HBA_HDWQ_DEF,
            LPFC_HBA_HDWQ_MIN, LPFC_HBA_HDWQ_MAX,
            "Set the number of I/O Hardware Queues");

#if IS_ENABLED(CONFIG_X86)
/**
 * lpfc_cpumask_irq_mode_init - initalizes cpumask of phba based on
 *                              irq_chann_mode
 * @phba: Pointer to HBA context object.
 **/
static void
lpfc_cpumask_irq_mode_init(struct lpfc_hba *phba)
{
        unsigned int cpu, first_cpu, numa_node = NUMA_NO_NODE;
        const struct cpumask *sibling_mask;
        struct cpumask *aff_mask = &phba->sli4_hba.irq_aff_mask;

        cpumask_clear(aff_mask);

        if (phba->irq_chann_mode == NUMA_MODE) {
                /* Check if we're a NUMA architecture */
                numa_node = dev_to_node(&phba->pcidev->dev);
                if (numa_node == NUMA_NO_NODE) {
                        phba->irq_chann_mode = NORMAL_MODE;
                        return;
                }
        }

        for_each_possible_cpu(cpu) {
                switch (phba->irq_chann_mode) {
                case NUMA_MODE:
                        if (cpu_to_node(cpu) == numa_node)
                                cpumask_set_cpu(cpu, aff_mask);
                        break;
                case NHT_MODE:
                        sibling_mask = topology_sibling_cpumask(cpu);
                        first_cpu = cpumask_first(sibling_mask);
                        if (first_cpu < nr_cpu_ids)
                                cpumask_set_cpu(first_cpu, aff_mask);
                        break;
                default:
                        break;
                }
        }
}
#endif

static void
lpfc_assign_default_irq_chann(struct lpfc_hba *phba)
{
#if IS_ENABLED(CONFIG_X86)
        switch (boot_cpu_data.x86_vendor) {
        case X86_VENDOR_AMD:
                /* If AMD architecture, then default is NUMA_MODE */
                phba->irq_chann_mode = NUMA_MODE;
                break;
        case X86_VENDOR_INTEL:
                /* If Intel architecture, then default is no hyperthread mode */
                phba->irq_chann_mode = NHT_MODE;
                break;
        default:
                phba->irq_chann_mode = NORMAL_MODE;
                break;
        }
        lpfc_cpumask_irq_mode_init(phba);
#else
        phba->irq_chann_mode = NORMAL_MODE;
#endif
}

/*
 * lpfc_irq_chann: Set the number of IRQ vectors that are available
 * for Hardware Queues to utilize.  This also will map to the number
 * of EQ / MSI-X vectors the driver will create. This should never be
 * more than the number of Hardware Queues
 *
 *      0               = Configure number of IRQ Channels to:
 *                        if AMD architecture, number of CPUs on HBA's NUMA node
 *                        if Intel architecture, number of physical CPUs.
 *                        otherwise, number of active CPUs.
 *      [1,256]         = Manually specify how many IRQ Channels to use.
 *
 * Value range is [0,256]. Default value is [0].
 */
static uint lpfc_irq_chann = LPFC_IRQ_CHANN_DEF;
module_param(lpfc_irq_chann, uint, 0444);
MODULE_PARM_DESC(lpfc_irq_chann, "Set number of interrupt vectors to allocate");

/* lpfc_irq_chann_init - Set the hba irq_chann initial value
 * @phba: lpfc_hba pointer.
 * @val: contains the initial value
 *
 * Description:
 * Validates the initial value is within range and assigns it to the
 * adapter. If not in range, an error message is posted and the
 * default value is assigned.
 *
 * Returns:
 * zero if value is in range and is set
 * -EINVAL if value was out of range
 **/
static int
lpfc_irq_chann_init(struct lpfc_hba *phba, uint32_t val)
{
        const struct cpumask *aff_mask;

        if (phba->cfg_use_msi != 2) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "8532 use_msi = %u ignoring cfg_irq_numa\n",
                                phba->cfg_use_msi);
                phba->irq_chann_mode = NORMAL_MODE;
                phba->cfg_irq_chann = LPFC_IRQ_CHANN_DEF;
                return 0;
        }

        /* Check if default setting was passed */
        if (val == LPFC_IRQ_CHANN_DEF)
                lpfc_assign_default_irq_chann(phba);

        if (phba->irq_chann_mode != NORMAL_MODE) {
                aff_mask = &phba->sli4_hba.irq_aff_mask;

                if (cpumask_empty(aff_mask)) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                        "8533 Could not identify CPUS for "
                                        "mode %d, ignoring\n",
                                        phba->irq_chann_mode);
                        phba->irq_chann_mode = NORMAL_MODE;
                        phba->cfg_irq_chann = LPFC_IRQ_CHANN_DEF;
                } else {
                        phba->cfg_irq_chann = cpumask_weight(aff_mask);

                        /* If no hyperthread mode, then set hdwq count to
                         * aff_mask weight as well
                         */
                        if (phba->irq_chann_mode == NHT_MODE)
                                phba->cfg_hdw_queue = phba->cfg_irq_chann;

                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                        "8543 lpfc_irq_chann set to %u "
                                        "(mode: %d)\n", phba->cfg_irq_chann,
                                        phba->irq_chann_mode);
                }
        } else {
                if (val > LPFC_IRQ_CHANN_MAX) {
                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                        "8545 lpfc_irq_chann attribute cannot "
                                        "be set to %u, allowed range is "
                                        "[%u,%u]\n",
                                        val,
                                        LPFC_IRQ_CHANN_MIN,
                                        LPFC_IRQ_CHANN_MAX);
                        phba->cfg_irq_chann = LPFC_IRQ_CHANN_DEF;
                        return -EINVAL;
                }
                phba->cfg_irq_chann = val;
        }

        return 0;
}

/**
 * lpfc_irq_chann_show - Display value of irq_chann
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains a string with the list sizes
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_irq_chann_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, "%u\n", phba->cfg_irq_chann);
}

static DEVICE_ATTR_RO(lpfc_irq_chann);

/*
# lpfc_enable_hba_reset: Allow or prevent HBA resets to the hardware.
#       0  = HBA resets disabled
#       1  = HBA resets enabled (default)
#       2  = HBA reset via PCI bus reset enabled
# Value range is [0,2]. Default value is 1.
*/
LPFC_ATTR_RW(enable_hba_reset, 1, 0, 2, "Enable HBA resets from the driver.");

/*
# lpfc_enable_hba_heartbeat: Disable HBA heartbeat timer..
#       0  = HBA Heartbeat disabled
#       1  = HBA Heartbeat enabled (default)
# Value range is [0,1]. Default value is 1.
*/
LPFC_ATTR_R(enable_hba_heartbeat, 0, 0, 1, "Enable HBA Heartbeat.");

/*
# lpfc_EnableXLane: Enable Express Lane Feature
#      0x0   Express Lane Feature disabled
#      0x1   Express Lane Feature enabled
# Value range is [0,1]. Default value is 0.
*/
LPFC_ATTR_R(EnableXLane, 0, 0, 1, "Enable Express Lane Feature.");

/*
# lpfc_XLanePriority:  Define CS_CTL priority for Express Lane Feature
#       0x0 - 0x7f  = CS_CTL field in FC header (high 7 bits)
# Value range is [0x0,0x7f]. Default value is 0
*/
LPFC_ATTR_RW(XLanePriority, 0, 0x0, 0x7f, "CS_CTL for Express Lane Feature.");

/*
# lpfc_enable_bg: Enable BlockGuard (Emulex's Implementation of T10-DIF)
#       0  = BlockGuard disabled (default)
#       1  = BlockGuard enabled
# Value range is [0,1]. Default value is 0.
*/
LPFC_ATTR_R(enable_bg, 0, 0, 1, "Enable BlockGuard Support");

/*
# lpfc_prot_mask: i
#       - Bit mask of host protection capabilities used to register with the
#         SCSI mid-layer
#       - Only meaningful if BG is turned on (lpfc_enable_bg=1).
#       - Allows you to ultimately specify which profiles to use
#       - Default will result in registering capabilities for all profiles.
#       - SHOST_DIF_TYPE1_PROTECTION    1
#               HBA supports T10 DIF Type 1: HBA to Target Type 1 Protection
#       - SHOST_DIX_TYPE0_PROTECTION    8
#               HBA supports DIX Type 0: Host to HBA protection only
#       - SHOST_DIX_TYPE1_PROTECTION    16
#               HBA supports DIX Type 1: Host to HBA  Type 1 protection
#
*/
LPFC_ATTR(prot_mask,
        (SHOST_DIF_TYPE1_PROTECTION |
        SHOST_DIX_TYPE0_PROTECTION |
        SHOST_DIX_TYPE1_PROTECTION),
        0,
        (SHOST_DIF_TYPE1_PROTECTION |
        SHOST_DIX_TYPE0_PROTECTION |
        SHOST_DIX_TYPE1_PROTECTION),
        "T10-DIF host protection capabilities mask");

/*
# lpfc_prot_guard: i
#       - Bit mask of protection guard types to register with the SCSI mid-layer
#       - Guard types are currently either 1) T10-DIF CRC 2) IP checksum
#       - Allows you to ultimately specify which profiles to use
#       - Default will result in registering capabilities for all guard types
#
*/
LPFC_ATTR(prot_guard,
        SHOST_DIX_GUARD_IP, SHOST_DIX_GUARD_CRC, SHOST_DIX_GUARD_IP,
        "T10-DIF host protection guard type");

/*
 * Delay initial NPort discovery when Clean Address bit is cleared in
 * FLOGI/FDISC accept and FCID/Fabric name/Fabric portname is changed.
 * This parameter can have value 0 or 1.
 * When this parameter is set to 0, no delay is added to the initial
 * discovery.
 * When this parameter is set to non-zero value, initial Nport discovery is
 * delayed by ra_tov seconds when Clean Address bit is cleared in FLOGI/FDISC
 * accept and FCID/Fabric name/Fabric portname is changed.
 * Driver always delay Nport discovery for subsequent FLOGI/FDISC completion
 * when Clean Address bit is cleared in FLOGI/FDISC
 * accept and FCID/Fabric name/Fabric portname is changed.
 * Default value is 0.
 */
LPFC_ATTR(delay_discovery, 0, 0, 1,
        "Delay NPort discovery when Clean Address bit is cleared.");

/*
 * lpfc_sg_seg_cnt - Initial Maximum DMA Segment Count
 * This value can be set to values between 64 and 4096. The default value
 * is 64, but may be increased to allow for larger Max I/O sizes. The scsi
 * and nvme layers will allow I/O sizes up to (MAX_SEG_COUNT * SEG_SIZE).
 * Because of the additional overhead involved in setting up T10-DIF,
 * this parameter will be limited to 128 if BlockGuard is enabled under SLI4
 * and will be limited to 512 if BlockGuard is enabled under SLI3.
 */
static uint lpfc_sg_seg_cnt = LPFC_DEFAULT_SG_SEG_CNT;
module_param(lpfc_sg_seg_cnt, uint, 0444);
MODULE_PARM_DESC(lpfc_sg_seg_cnt, "Max Scatter Gather Segment Count");

/**
 * lpfc_sg_seg_cnt_show - Display the scatter/gather list sizes
 *    configured for the adapter
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains a string with the list sizes
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_sg_seg_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;
        int len;

        len = scnprintf(buf, PAGE_SIZE, "SGL sz: %d  total SGEs: %d\n",
                       phba->cfg_sg_dma_buf_size, phba->cfg_total_seg_cnt);

        len += scnprintf(buf + len, PAGE_SIZE, "Cfg: %d  SCSI: %d  NVME: %d\n",
                        phba->cfg_sg_seg_cnt, phba->cfg_scsi_seg_cnt,
                        phba->cfg_nvme_seg_cnt);
        return len;
}

static DEVICE_ATTR_RO(lpfc_sg_seg_cnt);

/**
 * lpfc_sg_seg_cnt_init - Set the hba sg_seg_cnt initial value
 * @phba: lpfc_hba pointer.
 * @val: contains the initial value
 *
 * Description:
 * Validates the initial value is within range and assigns it to the
 * adapter. If not in range, an error message is posted and the
 * default value is assigned.
 *
 * Returns:
 * zero if value is in range and is set
 * -EINVAL if value was out of range
 **/
static int
lpfc_sg_seg_cnt_init(struct lpfc_hba *phba, int val)
{
        if (val >= LPFC_MIN_SG_SEG_CNT && val <= LPFC_MAX_SG_SEG_CNT) {
                phba->cfg_sg_seg_cnt = val;
                return 0;
        }
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0409 "LPFC_DRIVER_NAME"_sg_seg_cnt attribute cannot "
                        "be set to %d, allowed range is [%d, %d]\n",
                        val, LPFC_MIN_SG_SEG_CNT, LPFC_MAX_SG_SEG_CNT);
        phba->cfg_sg_seg_cnt = LPFC_DEFAULT_SG_SEG_CNT;
        return -EINVAL;
}

/*
 * lpfc_enable_mds_diags: Enable MDS Diagnostics
 *       0  = MDS Diagnostics disabled (default)
 *       1  = MDS Diagnostics enabled
 * Value range is [0,1]. Default value is 0.
 */
LPFC_ATTR_RW(enable_mds_diags, 0, 0, 1, "Enable MDS Diagnostics");

/*
 * lpfc_ras_fwlog_buffsize: Firmware logging host buffer size
 *      0 = Disable firmware logging (default)
 *      [1-4] = Multiple of 1/4th Mb of host memory for FW logging
 * Value range [0..4]. Default value is 0
 */
LPFC_ATTR(ras_fwlog_buffsize, 0, 0, 4, "Host memory for FW logging");
lpfc_param_show(ras_fwlog_buffsize);

static ssize_t
lpfc_ras_fwlog_buffsize_set(struct lpfc_hba  *phba, uint val)
{
        int ret = 0;
        enum ras_state state;

        if (!lpfc_rangecheck(val, 0, 4))
                return -EINVAL;

        if (phba->cfg_ras_fwlog_buffsize == val)
                return 0;

        if (phba->cfg_ras_fwlog_func != PCI_FUNC(phba->pcidev->devfn))
                return -EINVAL;

        spin_lock_irq(&phba->hbalock);
        state = phba->ras_fwlog.state;
        spin_unlock_irq(&phba->hbalock);

        if (state == REG_INPROGRESS) {
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI, "6147 RAS Logging "
                                "registration is in progress\n");
                return -EBUSY;
        }

        /* For disable logging: stop the logs and free the DMA.
         * For ras_fwlog_buffsize size change we still need to free and
         * reallocate the DMA in lpfc_sli4_ras_fwlog_init.
         */
        phba->cfg_ras_fwlog_buffsize = val;
        if (state == ACTIVE) {
                lpfc_ras_stop_fwlog(phba);
                lpfc_sli4_ras_dma_free(phba);
        }

        lpfc_sli4_ras_init(phba);
        if (phba->ras_fwlog.ras_enabled)
                ret = lpfc_sli4_ras_fwlog_init(phba, phba->cfg_ras_fwlog_level,
                                               LPFC_RAS_ENABLE_LOGGING);
        return ret;
}

lpfc_param_store(ras_fwlog_buffsize);
static DEVICE_ATTR_RW(lpfc_ras_fwlog_buffsize);

/*
 * lpfc_ras_fwlog_level: Firmware logging verbosity level
 * Valid only if firmware logging is enabled
 * 0(Least Verbosity) 4 (most verbosity)
 * Value range is [0..4]. Default value is 0
 */
LPFC_ATTR_RW(ras_fwlog_level, 0, 0, 4, "Firmware Logging Level");

/*
 * lpfc_ras_fwlog_func: Firmware logging enabled on function number
 * Default function which has RAS support : 0
 * Value Range is [0..7].
 * FW logging is a global action and enablement is via a specific
 * port.
 */
LPFC_ATTR_RW(ras_fwlog_func, 0, 0, 7, "Firmware Logging Enabled on Function");

/*
 * lpfc_enable_bbcr: Enable BB Credit Recovery
 *       0  = BB Credit Recovery disabled
 *       1  = BB Credit Recovery enabled (default)
 * Value range is [0,1]. Default value is 1.
 */
LPFC_BBCR_ATTR_RW(enable_bbcr, 1, 0, 1, "Enable BBC Recovery");

/*
 * lpfc_enable_dpp: Enable DPP on G7
 *       0  = DPP on G7 disabled
 *       1  = DPP on G7 enabled (default)
 * Value range is [0,1]. Default value is 1.
 */
LPFC_ATTR_RW(enable_dpp, 1, 0, 1, "Enable Direct Packet Push");

/*
 * lpfc_enable_mi: Enable FDMI MIB
 *       0  = disabled
 *       1  = enabled (default)
 * Value range is [0,1].
 */
LPFC_ATTR_R(enable_mi, 1, 0, 1, "Enable MI");

struct device_attribute *lpfc_hba_attrs[] = {
        &dev_attr_nvme_info,
        &dev_attr_scsi_stat,
        &dev_attr_bg_info,
        &dev_attr_bg_guard_err,
        &dev_attr_bg_apptag_err,
        &dev_attr_bg_reftag_err,
        &dev_attr_info,
        &dev_attr_serialnum,
        &dev_attr_modeldesc,
        &dev_attr_modelname,
        &dev_attr_programtype,
        &dev_attr_portnum,
        &dev_attr_fwrev,
        &dev_attr_hdw,
        &dev_attr_option_rom_version,
        &dev_attr_link_state,
        &dev_attr_num_discovered_ports,
        &dev_attr_menlo_mgmt_mode,
        &dev_attr_lpfc_drvr_version,
        &dev_attr_lpfc_enable_fip,
        &dev_attr_lpfc_temp_sensor,
        &dev_attr_lpfc_log_verbose,
        &dev_attr_lpfc_lun_queue_depth,
        &dev_attr_lpfc_tgt_queue_depth,
        &dev_attr_lpfc_hba_queue_depth,
        &dev_attr_lpfc_peer_port_login,
        &dev_attr_lpfc_nodev_tmo,
        &dev_attr_lpfc_devloss_tmo,
        &dev_attr_lpfc_enable_fc4_type,
        &dev_attr_lpfc_fcp_class,
        &dev_attr_lpfc_use_adisc,
        &dev_attr_lpfc_first_burst_size,
        &dev_attr_lpfc_ack0,
        &dev_attr_lpfc_xri_rebalancing,
        &dev_attr_lpfc_topology,
        &dev_attr_lpfc_scan_down,
        &dev_attr_lpfc_link_speed,
        &dev_attr_lpfc_fcp_io_sched,
        &dev_attr_lpfc_ns_query,
        &dev_attr_lpfc_fcp2_no_tgt_reset,
        &dev_attr_lpfc_cr_delay,
        &dev_attr_lpfc_cr_count,
        &dev_attr_lpfc_multi_ring_support,
        &dev_attr_lpfc_multi_ring_rctl,
        &dev_attr_lpfc_multi_ring_type,
        &dev_attr_lpfc_fdmi_on,
        &dev_attr_lpfc_enable_SmartSAN,
        &dev_attr_lpfc_max_luns,
        &dev_attr_lpfc_enable_npiv,
        &dev_attr_lpfc_fcf_failover_policy,
        &dev_attr_lpfc_enable_rrq,
        &dev_attr_nport_evt_cnt,
        &dev_attr_board_mode,
        &dev_attr_max_vpi,
        &dev_attr_used_vpi,
        &dev_attr_max_rpi,
        &dev_attr_used_rpi,
        &dev_attr_max_xri,
        &dev_attr_used_xri,
        &dev_attr_npiv_info,
        &dev_attr_issue_reset,
        &dev_attr_lpfc_poll,
        &dev_attr_lpfc_poll_tmo,
        &dev_attr_lpfc_task_mgmt_tmo,
        &dev_attr_lpfc_use_msi,
        &dev_attr_lpfc_nvme_oas,
        &dev_attr_lpfc_nvme_embed_cmd,
        &dev_attr_lpfc_fcp_imax,
        &dev_attr_lpfc_force_rscn,
        &dev_attr_lpfc_cq_poll_threshold,
        &dev_attr_lpfc_cq_max_proc_limit,
        &dev_attr_lpfc_fcp_cpu_map,
        &dev_attr_lpfc_fcp_mq_threshold,
        &dev_attr_lpfc_hdw_queue,
        &dev_attr_lpfc_irq_chann,
        &dev_attr_lpfc_suppress_rsp,
        &dev_attr_lpfc_nvmet_mrq,
        &dev_attr_lpfc_nvmet_mrq_post,
        &dev_attr_lpfc_nvme_enable_fb,
        &dev_attr_lpfc_nvmet_fb_size,
        &dev_attr_lpfc_enable_bg,
        &dev_attr_lpfc_soft_wwnn,
        &dev_attr_lpfc_soft_wwpn,
        &dev_attr_lpfc_soft_wwn_enable,
        &dev_attr_lpfc_enable_hba_reset,
        &dev_attr_lpfc_enable_hba_heartbeat,
        &dev_attr_lpfc_EnableXLane,
        &dev_attr_lpfc_XLanePriority,
        &dev_attr_lpfc_xlane_lun,
        &dev_attr_lpfc_xlane_tgt,
        &dev_attr_lpfc_xlane_vpt,
        &dev_attr_lpfc_xlane_lun_state,
        &dev_attr_lpfc_xlane_lun_status,
        &dev_attr_lpfc_xlane_priority,
        &dev_attr_lpfc_sg_seg_cnt,
        &dev_attr_lpfc_max_scsicmpl_time,
        &dev_attr_lpfc_stat_data_ctrl,
        &dev_attr_lpfc_aer_support,
        &dev_attr_lpfc_aer_state_cleanup,
        &dev_attr_lpfc_sriov_nr_virtfn,
        &dev_attr_lpfc_req_fw_upgrade,
        &dev_attr_lpfc_suppress_link_up,
        &dev_attr_iocb_hw,
        &dev_attr_pls,
        &dev_attr_pt,
        &dev_attr_txq_hw,
        &dev_attr_txcmplq_hw,
        &dev_attr_lpfc_sriov_hw_max_virtfn,
        &dev_attr_protocol,
        &dev_attr_lpfc_xlane_supported,
        &dev_attr_lpfc_enable_mds_diags,
        &dev_attr_lpfc_ras_fwlog_buffsize,
        &dev_attr_lpfc_ras_fwlog_level,
        &dev_attr_lpfc_ras_fwlog_func,
        &dev_attr_lpfc_enable_bbcr,
        &dev_attr_lpfc_enable_dpp,
        &dev_attr_lpfc_enable_mi,
        NULL,
};

struct device_attribute *lpfc_vport_attrs[] = {
        &dev_attr_info,
        &dev_attr_link_state,
        &dev_attr_num_discovered_ports,
        &dev_attr_lpfc_drvr_version,
        &dev_attr_lpfc_log_verbose,
        &dev_attr_lpfc_lun_queue_depth,
        &dev_attr_lpfc_tgt_queue_depth,
        &dev_attr_lpfc_nodev_tmo,
        &dev_attr_lpfc_devloss_tmo,
        &dev_attr_lpfc_hba_queue_depth,
        &dev_attr_lpfc_peer_port_login,
        &dev_attr_lpfc_restrict_login,
        &dev_attr_lpfc_fcp_class,
        &dev_attr_lpfc_use_adisc,
        &dev_attr_lpfc_first_burst_size,
        &dev_attr_lpfc_max_luns,
        &dev_attr_nport_evt_cnt,
        &dev_attr_npiv_info,
        &dev_attr_lpfc_enable_da_id,
        &dev_attr_lpfc_max_scsicmpl_time,
        &dev_attr_lpfc_stat_data_ctrl,
        &dev_attr_lpfc_static_vport,
        NULL,
};

/**
 * sysfs_ctlreg_write - Write method for writing to ctlreg
 * @filp: open sysfs file
 * @kobj: kernel kobject that contains the kernel class device.
 * @bin_attr: kernel attributes passed to us.
 * @buf: contains the data to be written to the adapter IOREG space.
 * @off: offset into buffer to beginning of data.
 * @count: bytes to transfer.
 *
 * Description:
 * Accessed via /sys/class/scsi_host/hostxxx/ctlreg.
 * Uses the adapter io control registers to send buf contents to the adapter.
 *
 * Returns:
 * -ERANGE off and count combo out of range
 * -EINVAL off, count or buff address invalid
 * -EPERM adapter is offline
 * value of count, buf contents written
 **/
static ssize_t
sysfs_ctlreg_write(struct file *filp, struct kobject *kobj,
                   struct bin_attribute *bin_attr,
                   char *buf, loff_t off, size_t count)
{
        size_t buf_off;
        struct device *dev = container_of(kobj, struct device, kobj);
        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 -EPERM;

        if ((off + count) > FF_REG_AREA_SIZE)
                return -ERANGE;

        if (count <= LPFC_REG_WRITE_KEY_SIZE)
                return 0;

        if (off % 4 || count % 4 || (unsigned long)buf % 4)
                return -EINVAL;

        /* This is to protect HBA registers from accidental writes. */
        if (memcmp(buf, LPFC_REG_WRITE_KEY, LPFC_REG_WRITE_KEY_SIZE))
                return -EINVAL;

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

        spin_lock_irq(&phba->hbalock);
        for (buf_off = 0; buf_off < count - LPFC_REG_WRITE_KEY_SIZE;
                        buf_off += sizeof(uint32_t))
                writel(*((uint32_t *)(buf + buf_off + LPFC_REG_WRITE_KEY_SIZE)),
                       phba->ctrl_regs_memmap_p + off + buf_off);

        spin_unlock_irq(&phba->hbalock);

        return count;
}

/**
 * sysfs_ctlreg_read - Read method for reading from ctlreg
 * @filp: open sysfs file
 * @kobj: kernel kobject that contains the kernel class device.
 * @bin_attr: kernel attributes passed to us.
 * @buf: if successful contains the data from the adapter IOREG space.
 * @off: offset into buffer to beginning of data.
 * @count: bytes to transfer.
 *
 * Description:
 * Accessed via /sys/class/scsi_host/hostxxx/ctlreg.
 * Uses the adapter io control registers to read data into buf.
 *
 * Returns:
 * -ERANGE off and count combo out of range
 * -EINVAL off, count or buff address invalid
 * value of count, buf contents read
 **/
static ssize_t
sysfs_ctlreg_read(struct file *filp, struct kobject *kobj,
                  struct bin_attribute *bin_attr,
                  char *buf, loff_t off, size_t count)
{
        size_t buf_off;
        uint32_t * tmp_ptr;
        struct device *dev = container_of(kobj, struct device, kobj);
        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 -EPERM;

        if (off > FF_REG_AREA_SIZE)
                return -ERANGE;

        if ((off + count) > FF_REG_AREA_SIZE)
                count = FF_REG_AREA_SIZE - off;

        if (count == 0) return 0;

        if (off % 4 || count % 4 || (unsigned long)buf % 4)
                return -EINVAL;

        spin_lock_irq(&phba->hbalock);

        for (buf_off = 0; buf_off < count; buf_off += sizeof(uint32_t)) {
                tmp_ptr = (uint32_t *)(buf + buf_off);
                *tmp_ptr = readl(phba->ctrl_regs_memmap_p + off + buf_off);
        }

        spin_unlock_irq(&phba->hbalock);

        return count;
}

static struct bin_attribute sysfs_ctlreg_attr = {
        .attr = {
                .name = "ctlreg",
                .mode = S_IRUSR | S_IWUSR,
        },
        .size = 256,
        .read = sysfs_ctlreg_read,
        .write = sysfs_ctlreg_write,
};

/**
 * sysfs_mbox_write - Write method for writing information via mbox
 * @filp: open sysfs file
 * @kobj: kernel kobject that contains the kernel class device.
 * @bin_attr: kernel attributes passed to us.
 * @buf: contains the data to be written to sysfs mbox.
 * @off: offset into buffer to beginning of data.
 * @count: bytes to transfer.
 *
 * Description:
 * Deprecated function. All mailbox access from user space is performed via the
 * bsg interface.
 *
 * Returns:
 * -EPERM operation not permitted
 **/
static ssize_t
sysfs_mbox_write(struct file *filp, struct kobject *kobj,
                 struct bin_attribute *bin_attr,
                 char *buf, loff_t off, size_t count)
{
        return -EPERM;
}

/**
 * sysfs_mbox_read - Read method for reading information via mbox
 * @filp: open sysfs file
 * @kobj: kernel kobject that contains the kernel class device.
 * @bin_attr: kernel attributes passed to us.
 * @buf: contains the data to be read from sysfs mbox.
 * @off: offset into buffer to beginning of data.
 * @count: bytes to transfer.
 *
 * Description:
 * Deprecated function. All mailbox access from user space is performed via the
 * bsg interface.
 *
 * Returns:
 * -EPERM operation not permitted
 **/
static ssize_t
sysfs_mbox_read(struct file *filp, struct kobject *kobj,
                struct bin_attribute *bin_attr,
                char *buf, loff_t off, size_t count)
{
        return -EPERM;
}

static struct bin_attribute sysfs_mbox_attr = {
        .attr = {
                .name = "mbox",
                .mode = S_IRUSR | S_IWUSR,
        },
        .size = MAILBOX_SYSFS_MAX,
        .read = sysfs_mbox_read,
        .write = sysfs_mbox_write,
};

/**
 * lpfc_alloc_sysfs_attr - Creates the ctlreg and mbox entries
 * @vport: address of lpfc vport structure.
 *
 * Return codes:
 * zero on success
 * error return code from sysfs_create_bin_file()
 **/
int
lpfc_alloc_sysfs_attr(struct lpfc_vport *vport)
{
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
        int error;

        error = sysfs_create_bin_file(&shost->shost_dev.kobj,
                                      &sysfs_drvr_stat_data_attr);

        /* Virtual ports do not need ctrl_reg and mbox */
        if (error || vport->port_type == LPFC_NPIV_PORT)
                goto out;

        error = sysfs_create_bin_file(&shost->shost_dev.kobj,
                                      &sysfs_ctlreg_attr);
        if (error)
                goto out_remove_stat_attr;

        error = sysfs_create_bin_file(&shost->shost_dev.kobj,
                                      &sysfs_mbox_attr);
        if (error)
                goto out_remove_ctlreg_attr;

        return 0;
out_remove_ctlreg_attr:
        sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_ctlreg_attr);
out_remove_stat_attr:
        sysfs_remove_bin_file(&shost->shost_dev.kobj,
                        &sysfs_drvr_stat_data_attr);
out:
        return error;
}

/**
 * lpfc_free_sysfs_attr - Removes the ctlreg and mbox entries
 * @vport: address of lpfc vport structure.
 **/
void
lpfc_free_sysfs_attr(struct lpfc_vport *vport)
{
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
        sysfs_remove_bin_file(&shost->shost_dev.kobj,
                &sysfs_drvr_stat_data_attr);
        /* Virtual ports do not need ctrl_reg and mbox */
        if (vport->port_type == LPFC_NPIV_PORT)
                return;
        sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_mbox_attr);
        sysfs_remove_bin_file(&shost->shost_dev.kobj, &sysfs_ctlreg_attr);
}

/*
 * Dynamic FC Host Attributes Support
 */

/**
 * lpfc_get_host_symbolic_name - Copy symbolic name into the scsi host
 * @shost: kernel scsi host pointer.
 **/
static void
lpfc_get_host_symbolic_name(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;

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

/**
 * lpfc_get_host_port_id - Copy the vport DID into the scsi host port id
 * @shost: kernel scsi host pointer.
 **/
static void
lpfc_get_host_port_id(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;

        /* note: fc_myDID already in cpu endianness */
        fc_host_port_id(shost) = vport->fc_myDID;
}

/**
 * lpfc_get_host_port_type - Set the value of the scsi host port type
 * @shost: kernel scsi host pointer.
 **/
static void
lpfc_get_host_port_type(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        spin_lock_irq(shost->host_lock);

        if (vport->port_type == LPFC_NPIV_PORT) {
                fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
        } else if (lpfc_is_link_up(phba)) {
                if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
                        if (vport->fc_flag & FC_PUBLIC_LOOP)
                                fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
                        else
                                fc_host_port_type(shost) = FC_PORTTYPE_LPORT;
                } else {
                        if (vport->fc_flag & FC_FABRIC)
                                fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
                        else
                                fc_host_port_type(shost) = FC_PORTTYPE_PTP;
                }
        } else
                fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;

        spin_unlock_irq(shost->host_lock);
}

/**
 * lpfc_get_host_port_state - Set the value of the scsi host port state
 * @shost: kernel scsi host pointer.
 **/
static void
lpfc_get_host_port_state(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        spin_lock_irq(shost->host_lock);

        if (vport->fc_flag & FC_OFFLINE_MODE)
                fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
        else {
                switch (phba->link_state) {
                case LPFC_LINK_UNKNOWN:
                case LPFC_LINK_DOWN:
                        fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
                        break;
                case LPFC_LINK_UP:
                case LPFC_CLEAR_LA:
                case LPFC_HBA_READY:
                        /* Links up, reports port state accordingly */
                        if (vport->port_state < LPFC_VPORT_READY)
                                fc_host_port_state(shost) =
                                                        FC_PORTSTATE_BYPASSED;
                        else
                                fc_host_port_state(shost) =
                                                        FC_PORTSTATE_ONLINE;
                        break;
                case LPFC_HBA_ERROR:
                        fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
                        break;
                default:
                        fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
                        break;
                }
        }

        spin_unlock_irq(shost->host_lock);
}

/**
 * lpfc_get_host_speed - Set the value of the scsi host speed
 * @shost: kernel scsi host pointer.
 **/
static void
lpfc_get_host_speed(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;

        spin_lock_irq(shost->host_lock);

        if ((lpfc_is_link_up(phba)) && (!(phba->hba_flag & HBA_FCOE_MODE))) {
                switch(phba->fc_linkspeed) {
                case LPFC_LINK_SPEED_1GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
                        break;
                case LPFC_LINK_SPEED_2GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
                        break;
                case LPFC_LINK_SPEED_4GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
                        break;
                case LPFC_LINK_SPEED_8GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
                        break;
                case LPFC_LINK_SPEED_10GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
                        break;
                case LPFC_LINK_SPEED_16GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
                        break;
                case LPFC_LINK_SPEED_32GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_32GBIT;
                        break;
                case LPFC_LINK_SPEED_64GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_64GBIT;
                        break;
                case LPFC_LINK_SPEED_128GHZ:
                        fc_host_speed(shost) = FC_PORTSPEED_128GBIT;
                        break;
                default:
                        fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
                        break;
                }
        } else if (lpfc_is_link_up(phba) && (phba->hba_flag & HBA_FCOE_MODE)) {
                switch (phba->fc_linkspeed) {
                case LPFC_ASYNC_LINK_SPEED_1GBPS:
                        fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
                        break;
                case LPFC_ASYNC_LINK_SPEED_10GBPS:
                        fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
                        break;
                case LPFC_ASYNC_LINK_SPEED_20GBPS:
                        fc_host_speed(shost) = FC_PORTSPEED_20GBIT;
                        break;
                case LPFC_ASYNC_LINK_SPEED_25GBPS:
                        fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
                        break;
                case LPFC_ASYNC_LINK_SPEED_40GBPS:
                        fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
                        break;
                case LPFC_ASYNC_LINK_SPEED_100GBPS:
                        fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
                        break;
                default:
                        fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
                        break;
                }
        } else
                fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;

        spin_unlock_irq(shost->host_lock);
}

/**
 * lpfc_get_host_fabric_name - Set the value of the scsi host fabric name
 * @shost: kernel scsi host pointer.
 **/
static void
lpfc_get_host_fabric_name (struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        u64 node_name;

        spin_lock_irq(shost->host_lock);

        if ((vport->port_state > LPFC_FLOGI) &&
            ((vport->fc_flag & FC_FABRIC) ||
             ((phba->fc_topology == LPFC_TOPOLOGY_LOOP) &&
              (vport->fc_flag & FC_PUBLIC_LOOP))))
                node_name = wwn_to_u64(phba->fc_fabparam.nodeName.u.wwn);
        else
                /* fabric is local port if there is no F/FL_Port */
                node_name = 0;

        spin_unlock_irq(shost->host_lock);

        fc_host_fabric_name(shost) = node_name;
}

/**
 * lpfc_get_stats - Return statistical information about the adapter
 * @shost: kernel scsi host pointer.
 *
 * Notes:
 * NULL on error for link down, no mbox pool, sli2 active,
 * management not allowed, memory allocation error, or mbox error.
 *
 * Returns:
 * NULL for error
 * address of the adapter host statistics
 **/
static struct fc_host_statistics *
lpfc_get_stats(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        struct lpfc_sli   *psli = &phba->sli;
        struct fc_host_statistics *hs = &phba->link_stats;
        struct lpfc_lnk_stat * lso = &psli->lnk_stat_offsets;
        LPFC_MBOXQ_t *pmboxq;
        MAILBOX_t *pmb;
        int rc = 0;

        /*
         * 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 NULL;

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

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

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

        if (vport->fc_flag & FC_OFFLINE_MODE)
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        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 NULL;
        }

        memset(hs, 0, sizeof (struct fc_host_statistics));

        hs->tx_frames = pmb->un.varRdStatus.xmitFrameCnt;
        /*
         * The MBX_READ_STATUS returns tx_k_bytes which has to
         * converted to words
         */
        hs->tx_words = (uint64_t)
                        ((uint64_t)pmb->un.varRdStatus.xmitByteCnt
                        * (uint64_t)256);
        hs->rx_frames = pmb->un.varRdStatus.rcvFrameCnt;
        hs->rx_words = (uint64_t)
                        ((uint64_t)pmb->un.varRdStatus.rcvByteCnt
                         * (uint64_t)256);

        memset(pmboxq, 0, sizeof (LPFC_MBOXQ_t));
        pmb->mbxCommand = MBX_READ_LNK_STAT;
        pmb->mbxOwner = OWN_HOST;
        pmboxq->ctx_buf = NULL;
        pmboxq->vport = vport;

        if (vport->fc_flag & FC_OFFLINE_MODE)
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        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 NULL;
        }

        hs->link_failure_count = pmb->un.varRdLnk.linkFailureCnt;
        hs->loss_of_sync_count = pmb->un.varRdLnk.lossSyncCnt;
        hs->loss_of_signal_count = pmb->un.varRdLnk.lossSignalCnt;
        hs->prim_seq_protocol_err_count = pmb->un.varRdLnk.primSeqErrCnt;
        hs->invalid_tx_word_count = pmb->un.varRdLnk.invalidXmitWord;
        hs->invalid_crc_count = pmb->un.varRdLnk.crcCnt;
        hs->error_frames = pmb->un.varRdLnk.crcCnt;

        hs->link_failure_count -= lso->link_failure_count;
        hs->loss_of_sync_count -= lso->loss_of_sync_count;
        hs->loss_of_signal_count -= lso->loss_of_signal_count;
        hs->prim_seq_protocol_err_count -= lso->prim_seq_protocol_err_count;
        hs->invalid_tx_word_count -= lso->invalid_tx_word_count;
        hs->invalid_crc_count -= lso->invalid_crc_count;
        hs->error_frames -= lso->error_frames;

        if (phba->hba_flag & HBA_FCOE_MODE) {
                hs->lip_count = -1;
                hs->nos_count = (phba->link_events >> 1);
                hs->nos_count -= lso->link_events;
        } else if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
                hs->lip_count = (phba->fc_eventTag >> 1);
                hs->lip_count -= lso->link_events;
                hs->nos_count = -1;
        } else {
                hs->lip_count = -1;
                hs->nos_count = (phba->fc_eventTag >> 1);
                hs->nos_count -= lso->link_events;
        }

        hs->dumped_frames = -1;

        hs->seconds_since_last_reset = ktime_get_seconds() - psli->stats_start;

        mempool_free(pmboxq, phba->mbox_mem_pool);

        return hs;
}

/**
 * lpfc_reset_stats - Copy the adapter link stats information
 * @shost: kernel scsi host pointer.
 **/
static void
lpfc_reset_stats(struct Scsi_Host *shost)
{
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        struct lpfc_sli   *psli = &phba->sli;
        struct lpfc_lnk_stat *lso = &psli->lnk_stat_offsets;
        LPFC_MBOXQ_t *pmboxq;
        MAILBOX_t *pmb;
        int rc = 0;

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

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

        pmb = &pmboxq->u.mb;
        pmb->mbxCommand = MBX_READ_STATUS;
        pmb->mbxOwner = OWN_HOST;
        pmb->un.varWords[0] = 0x1; /* reset request */
        pmboxq->ctx_buf = NULL;
        pmboxq->vport = vport;

        if ((vport->fc_flag & FC_OFFLINE_MODE) ||
                (!(psli->sli_flag & LPFC_SLI_ACTIVE)))
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        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;
        }

        memset(pmboxq, 0, sizeof(LPFC_MBOXQ_t));
        pmb->mbxCommand = MBX_READ_LNK_STAT;
        pmb->mbxOwner = OWN_HOST;
        pmboxq->ctx_buf = NULL;
        pmboxq->vport = vport;

        if ((vport->fc_flag & FC_OFFLINE_MODE) ||
            (!(psli->sli_flag & LPFC_SLI_ACTIVE)))
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        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;
        }

        lso->link_failure_count = pmb->un.varRdLnk.linkFailureCnt;
        lso->loss_of_sync_count = pmb->un.varRdLnk.lossSyncCnt;
        lso->loss_of_signal_count = pmb->un.varRdLnk.lossSignalCnt;
        lso->prim_seq_protocol_err_count = pmb->un.varRdLnk.primSeqErrCnt;
        lso->invalid_tx_word_count = pmb->un.varRdLnk.invalidXmitWord;
        lso->invalid_crc_count = pmb->un.varRdLnk.crcCnt;
        lso->error_frames = pmb->un.varRdLnk.crcCnt;
        if (phba->hba_flag & HBA_FCOE_MODE)
                lso->link_events = (phba->link_events >> 1);
        else
                lso->link_events = (phba->fc_eventTag >> 1);

        psli->stats_start = ktime_get_seconds();

        mempool_free(pmboxq, phba->mbox_mem_pool);

        return;
}

/*
 * The LPFC driver treats linkdown handling as target loss events so there
 * are no sysfs handlers for link_down_tmo.
 */

/**
 * lpfc_get_node_by_target - Return the nodelist for a target
 * @starget: kernel scsi target pointer.
 *
 * Returns:
 * address of the node list if found
 * NULL target not found
 **/
static struct lpfc_nodelist *
lpfc_get_node_by_target(struct scsi_target *starget)
{
        struct Scsi_Host  *shost = dev_to_shost(starget->dev.parent);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_nodelist *ndlp;

        spin_lock_irq(shost->host_lock);
        /* Search for this, mapped, target ID */
        list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
                if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
                    starget->id == ndlp->nlp_sid) {
                        spin_unlock_irq(shost->host_lock);
                        return ndlp;
                }
        }
        spin_unlock_irq(shost->host_lock);
        return NULL;
}

/**
 * lpfc_get_starget_port_id - Set the target port id to the ndlp DID or -1
 * @starget: kernel scsi target pointer.
 **/
static void
lpfc_get_starget_port_id(struct scsi_target *starget)
{
        struct lpfc_nodelist *ndlp = lpfc_get_node_by_target(starget);

        fc_starget_port_id(starget) = ndlp ? ndlp->nlp_DID : -1;
}

/**
 * lpfc_get_starget_node_name - Set the target node name
 * @starget: kernel scsi target pointer.
 *
 * Description: Set the target node name to the ndlp node name wwn or zero.
 **/
static void
lpfc_get_starget_node_name(struct scsi_target *starget)
{
        struct lpfc_nodelist *ndlp = lpfc_get_node_by_target(starget);

        fc_starget_node_name(starget) =
                ndlp ? wwn_to_u64(ndlp->nlp_nodename.u.wwn) : 0;
}

/**
 * lpfc_get_starget_port_name - Set the target port name
 * @starget: kernel scsi target pointer.
 *
 * Description:  set the target port name to the ndlp port name wwn or zero.
 **/
static void
lpfc_get_starget_port_name(struct scsi_target *starget)
{
        struct lpfc_nodelist *ndlp = lpfc_get_node_by_target(starget);

        fc_starget_port_name(starget) =
                ndlp ? wwn_to_u64(ndlp->nlp_portname.u.wwn) : 0;
}

/**
 * lpfc_set_rport_loss_tmo - Set the rport dev loss tmo
 * @rport: fc rport address.
 * @timeout: new value for dev loss tmo.
 *
 * Description:
 * If timeout is non zero set the dev_loss_tmo to timeout, else set
 * dev_loss_tmo to one.
 **/
static void
lpfc_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
{
        struct lpfc_rport_data *rdata = rport->dd_data;
        struct lpfc_nodelist *ndlp = rdata->pnode;
#if (IS_ENABLED(CONFIG_NVME_FC))
        struct lpfc_nvme_rport *nrport = NULL;
#endif

        if (timeout)
                rport->dev_loss_tmo = timeout;
        else
                rport->dev_loss_tmo = 1;

        if (!ndlp) {
                dev_info(&rport->dev, "Cannot find remote node to "
                                      "set rport dev loss tmo, port_id x%x\n",
                                      rport->port_id);
                return;
        }

#if (IS_ENABLED(CONFIG_NVME_FC))
        nrport = lpfc_ndlp_get_nrport(ndlp);

        if (nrport && nrport->remoteport)
                nvme_fc_set_remoteport_devloss(nrport->remoteport,
                                               rport->dev_loss_tmo);
#endif
}

/*
 * lpfc_rport_show_function - Return rport target information
 *
 * Description:
 * Macro that uses field to generate a function with the name lpfc_show_rport_
 *
 * lpfc_show_rport_##field: returns the bytes formatted in buf
 * @cdev: class converted to an fc_rport.
 * @buf: on return contains the target_field or zero.
 *
 * Returns: size of formatted string.
 **/
#define lpfc_rport_show_function(field, format_string, sz, cast)        \
static ssize_t                                                          \
lpfc_show_rport_##field (struct device *dev,                            \
                         struct device_attribute *attr,                 \
                         char *buf)                                     \
{                                                                       \
        struct fc_rport *rport = transport_class_to_rport(dev);         \
        struct lpfc_rport_data *rdata = rport->hostdata;                \
        return scnprintf(buf, sz, format_string,                        \
                (rdata->target) ? cast rdata->target->field : 0);       \
}

#define lpfc_rport_rd_attr(field, format_string, sz)                    \
        lpfc_rport_show_function(field, format_string, sz, )            \
static FC_RPORT_ATTR(field, S_IRUGO, lpfc_show_rport_##field, NULL)

/**
 * lpfc_set_vport_symbolic_name - Set the vport's symbolic name
 * @fc_vport: The fc_vport who's symbolic name has been changed.
 *
 * Description:
 * This function is called by the transport after the @fc_vport's symbolic name
 * has been changed. This function re-registers the symbolic name with the
 * switch to propagate the change into the fabric if the vport is active.
 **/
static void
lpfc_set_vport_symbolic_name(struct fc_vport *fc_vport)
{
        struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;

        if (vport->port_state == LPFC_VPORT_READY)
                lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
}

/**
 * lpfc_hba_log_verbose_init - Set hba's log verbose level
 * @phba: Pointer to lpfc_hba struct.
 * @verbose: Verbose level to set.
 *
 * This function is called by the lpfc_get_cfgparam() routine to set the
 * module lpfc_log_verbose into the @phba cfg_log_verbose for use with
 * log message according to the module's lpfc_log_verbose parameter setting
 * before hba port or vport created.
 **/
static void
lpfc_hba_log_verbose_init(struct lpfc_hba *phba, uint32_t verbose)
{
        phba->cfg_log_verbose = verbose;
}

struct fc_function_template lpfc_transport_functions = {
        /* fixed attributes the driver supports */
        .show_host_node_name = 1,
        .show_host_port_name = 1,
        .show_host_supported_classes = 1,
        .show_host_supported_fc4s = 1,
        .show_host_supported_speeds = 1,
        .show_host_maxframe_size = 1,

        .get_host_symbolic_name = lpfc_get_host_symbolic_name,
        .show_host_symbolic_name = 1,

        /* dynamic attributes the driver supports */
        .get_host_port_id = lpfc_get_host_port_id,
        .show_host_port_id = 1,

        .get_host_port_type = lpfc_get_host_port_type,
        .show_host_port_type = 1,

        .get_host_port_state = lpfc_get_host_port_state,
        .show_host_port_state = 1,

        /* active_fc4s is shown but doesn't change (thus no get function) */
        .show_host_active_fc4s = 1,

        .get_host_speed = lpfc_get_host_speed,
        .show_host_speed = 1,

        .get_host_fabric_name = lpfc_get_host_fabric_name,
        .show_host_fabric_name = 1,

        /*
         * The LPFC driver treats linkdown handling as target loss events
         * so there are no sysfs handlers for link_down_tmo.
         */

        .get_fc_host_stats = lpfc_get_stats,
        .reset_fc_host_stats = lpfc_reset_stats,

        .dd_fcrport_size = sizeof(struct lpfc_rport_data),
        .show_rport_maxframe_size = 1,
        .show_rport_supported_classes = 1,

        .set_rport_dev_loss_tmo = lpfc_set_rport_loss_tmo,
        .show_rport_dev_loss_tmo = 1,

        .get_starget_port_id  = lpfc_get_starget_port_id,
        .show_starget_port_id = 1,

        .get_starget_node_name = lpfc_get_starget_node_name,
        .show_starget_node_name = 1,

        .get_starget_port_name = lpfc_get_starget_port_name,
        .show_starget_port_name = 1,

        .issue_fc_host_lip = lpfc_issue_lip,
        .dev_loss_tmo_callbk = lpfc_dev_loss_tmo_callbk,
        .terminate_rport_io = lpfc_terminate_rport_io,

        .dd_fcvport_size = sizeof(struct lpfc_vport *),

        .vport_disable = lpfc_vport_disable,

        .set_vport_symbolic_name = lpfc_set_vport_symbolic_name,

        .bsg_request = lpfc_bsg_request,
        .bsg_timeout = lpfc_bsg_timeout,
};

struct fc_function_template lpfc_vport_transport_functions = {
        /* fixed attributes the driver supports */
        .show_host_node_name = 1,
        .show_host_port_name = 1,
        .show_host_supported_classes = 1,
        .show_host_supported_fc4s = 1,
        .show_host_supported_speeds = 1,
        .show_host_maxframe_size = 1,

        .get_host_symbolic_name = lpfc_get_host_symbolic_name,
        .show_host_symbolic_name = 1,

        /* dynamic attributes the driver supports */
        .get_host_port_id = lpfc_get_host_port_id,
        .show_host_port_id = 1,

        .get_host_port_type = lpfc_get_host_port_type,
        .show_host_port_type = 1,

        .get_host_port_state = lpfc_get_host_port_state,
        .show_host_port_state = 1,

        /* active_fc4s is shown but doesn't change (thus no get function) */
        .show_host_active_fc4s = 1,

        .get_host_speed = lpfc_get_host_speed,
        .show_host_speed = 1,

        .get_host_fabric_name = lpfc_get_host_fabric_name,
        .show_host_fabric_name = 1,

        /*
         * The LPFC driver treats linkdown handling as target loss events
         * so there are no sysfs handlers for link_down_tmo.
         */

        .get_fc_host_stats = lpfc_get_stats,
        .reset_fc_host_stats = lpfc_reset_stats,

        .dd_fcrport_size = sizeof(struct lpfc_rport_data),
        .show_rport_maxframe_size = 1,
        .show_rport_supported_classes = 1,

        .set_rport_dev_loss_tmo = lpfc_set_rport_loss_tmo,
        .show_rport_dev_loss_tmo = 1,

        .get_starget_port_id  = lpfc_get_starget_port_id,
        .show_starget_port_id = 1,

        .get_starget_node_name = lpfc_get_starget_node_name,
        .show_starget_node_name = 1,

        .get_starget_port_name = lpfc_get_starget_port_name,
        .show_starget_port_name = 1,

        .dev_loss_tmo_callbk = lpfc_dev_loss_tmo_callbk,
        .terminate_rport_io = lpfc_terminate_rport_io,

        .vport_disable = lpfc_vport_disable,

        .set_vport_symbolic_name = lpfc_set_vport_symbolic_name,
};

/**
 * lpfc_get_hba_function_mode - Used to determine the HBA function in FCoE
 * Mode
 * @phba: lpfc_hba pointer.
 **/
static void
lpfc_get_hba_function_mode(struct lpfc_hba *phba)
{
        /* If the adapter supports FCoE mode */
        switch (phba->pcidev->device) {
        case PCI_DEVICE_ID_SKYHAWK:
        case PCI_DEVICE_ID_SKYHAWK_VF:
        case PCI_DEVICE_ID_LANCER_FCOE:
        case PCI_DEVICE_ID_LANCER_FCOE_VF:
        case PCI_DEVICE_ID_ZEPHYR_DCSP:
        case PCI_DEVICE_ID_HORNET:
        case PCI_DEVICE_ID_TIGERSHARK:
        case PCI_DEVICE_ID_TOMCAT:
                phba->hba_flag |= HBA_FCOE_MODE;
                break;
        default:
        /* for others, clear the flag */
                phba->hba_flag &= ~HBA_FCOE_MODE;
        }
}

/**
 * lpfc_get_cfgparam - Used during probe_one to init the adapter structure
 * @phba: lpfc_hba pointer.
 **/
void
lpfc_get_cfgparam(struct lpfc_hba *phba)
{
        lpfc_hba_log_verbose_init(phba, lpfc_log_verbose);
        lpfc_fcp_io_sched_init(phba, lpfc_fcp_io_sched);
        lpfc_ns_query_init(phba, lpfc_ns_query);
        lpfc_fcp2_no_tgt_reset_init(phba, lpfc_fcp2_no_tgt_reset);
        lpfc_cr_delay_init(phba, lpfc_cr_delay);
        lpfc_cr_count_init(phba, lpfc_cr_count);
        lpfc_multi_ring_support_init(phba, lpfc_multi_ring_support);
        lpfc_multi_ring_rctl_init(phba, lpfc_multi_ring_rctl);
        lpfc_multi_ring_type_init(phba, lpfc_multi_ring_type);
        lpfc_ack0_init(phba, lpfc_ack0);
        lpfc_xri_rebalancing_init(phba, lpfc_xri_rebalancing);
        lpfc_topology_init(phba, lpfc_topology);
        lpfc_link_speed_init(phba, lpfc_link_speed);
        lpfc_poll_tmo_init(phba, lpfc_poll_tmo);
        lpfc_task_mgmt_tmo_init(phba, lpfc_task_mgmt_tmo);
        lpfc_enable_npiv_init(phba, lpfc_enable_npiv);
        lpfc_fcf_failover_policy_init(phba, lpfc_fcf_failover_policy);
        lpfc_enable_rrq_init(phba, lpfc_enable_rrq);
        lpfc_fdmi_on_init(phba, lpfc_fdmi_on);
        lpfc_enable_SmartSAN_init(phba, lpfc_enable_SmartSAN);
        lpfc_use_msi_init(phba, lpfc_use_msi);
        lpfc_nvme_oas_init(phba, lpfc_nvme_oas);
        lpfc_nvme_embed_cmd_init(phba, lpfc_nvme_embed_cmd);
        lpfc_fcp_imax_init(phba, lpfc_fcp_imax);
        lpfc_force_rscn_init(phba, lpfc_force_rscn);
        lpfc_cq_poll_threshold_init(phba, lpfc_cq_poll_threshold);
        lpfc_cq_max_proc_limit_init(phba, lpfc_cq_max_proc_limit);
        lpfc_fcp_cpu_map_init(phba, lpfc_fcp_cpu_map);
        lpfc_enable_hba_reset_init(phba, lpfc_enable_hba_reset);
        lpfc_enable_hba_heartbeat_init(phba, lpfc_enable_hba_heartbeat);

        lpfc_EnableXLane_init(phba, lpfc_EnableXLane);
        if (phba->sli_rev != LPFC_SLI_REV4)
                phba->cfg_EnableXLane = 0;
        lpfc_XLanePriority_init(phba, lpfc_XLanePriority);

        memset(phba->cfg_oas_tgt_wwpn, 0, (8 * sizeof(uint8_t)));
        memset(phba->cfg_oas_vpt_wwpn, 0, (8 * sizeof(uint8_t)));
        phba->cfg_oas_lun_state = 0;
        phba->cfg_oas_lun_status = 0;
        phba->cfg_oas_flags = 0;
        phba->cfg_oas_priority = 0;
        lpfc_enable_bg_init(phba, lpfc_enable_bg);
        lpfc_prot_mask_init(phba, lpfc_prot_mask);
        lpfc_prot_guard_init(phba, lpfc_prot_guard);
        if (phba->sli_rev == LPFC_SLI_REV4)
                phba->cfg_poll = 0;
        else
                phba->cfg_poll = lpfc_poll;

        /* Get the function mode */
        lpfc_get_hba_function_mode(phba);

        /* BlockGuard allowed for FC only. */
        if (phba->cfg_enable_bg && phba->hba_flag & HBA_FCOE_MODE) {
                lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                                "0581 BlockGuard feature not supported\n");
                /* If set, clear the BlockGuard support param */
                phba->cfg_enable_bg = 0;
        } else if (phba->cfg_enable_bg) {
                phba->sli3_options |= LPFC_SLI3_BG_ENABLED;
        }

        lpfc_suppress_rsp_init(phba, lpfc_suppress_rsp);

        lpfc_enable_fc4_type_init(phba, lpfc_enable_fc4_type);
        lpfc_nvmet_mrq_init(phba, lpfc_nvmet_mrq);
        lpfc_nvmet_mrq_post_init(phba, lpfc_nvmet_mrq_post);

        /* Initialize first burst. Target vs Initiator are different. */
        lpfc_nvme_enable_fb_init(phba, lpfc_nvme_enable_fb);
        lpfc_nvmet_fb_size_init(phba, lpfc_nvmet_fb_size);
        lpfc_fcp_mq_threshold_init(phba, lpfc_fcp_mq_threshold);
        lpfc_hdw_queue_init(phba, lpfc_hdw_queue);
        lpfc_irq_chann_init(phba, lpfc_irq_chann);
        lpfc_enable_bbcr_init(phba, lpfc_enable_bbcr);
        lpfc_enable_dpp_init(phba, lpfc_enable_dpp);
        lpfc_enable_mi_init(phba, lpfc_enable_mi);

        if (phba->sli_rev != LPFC_SLI_REV4) {
                /* NVME only supported on SLI4 */
                phba->nvmet_support = 0;
                phba->cfg_nvmet_mrq = 0;
                phba->cfg_enable_fc4_type = LPFC_ENABLE_FCP;
                phba->cfg_enable_bbcr = 0;
                phba->cfg_xri_rebalancing = 0;
        } else {
                /* We MUST have FCP support */
                if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
                        phba->cfg_enable_fc4_type |= LPFC_ENABLE_FCP;
        }

        phba->cfg_auto_imax = (phba->cfg_fcp_imax) ? 0 : 1;

        phba->cfg_enable_pbde = 0;

        /* A value of 0 means use the number of CPUs found in the system */
        if (phba->cfg_hdw_queue == 0)
                phba->cfg_hdw_queue = phba->sli4_hba.num_present_cpu;
        if (phba->cfg_irq_chann == 0)
                phba->cfg_irq_chann = phba->sli4_hba.num_present_cpu;
        if (phba->cfg_irq_chann > phba->cfg_hdw_queue)
                phba->cfg_irq_chann = phba->cfg_hdw_queue;

        phba->cfg_soft_wwnn = 0L;
        phba->cfg_soft_wwpn = 0L;
        lpfc_sg_seg_cnt_init(phba, lpfc_sg_seg_cnt);
        lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth);
        lpfc_aer_support_init(phba, lpfc_aer_support);
        lpfc_sriov_nr_virtfn_init(phba, lpfc_sriov_nr_virtfn);
        lpfc_request_firmware_upgrade_init(phba, lpfc_req_fw_upgrade);
        lpfc_suppress_link_up_init(phba, lpfc_suppress_link_up);
        lpfc_delay_discovery_init(phba, lpfc_delay_discovery);
        lpfc_sli_mode_init(phba, lpfc_sli_mode);
        lpfc_enable_mds_diags_init(phba, lpfc_enable_mds_diags);
        lpfc_ras_fwlog_buffsize_init(phba, lpfc_ras_fwlog_buffsize);
        lpfc_ras_fwlog_level_init(phba, lpfc_ras_fwlog_level);
        lpfc_ras_fwlog_func_init(phba, lpfc_ras_fwlog_func);

        return;
}

/**
 * lpfc_nvme_mod_param_dep - Adjust module parameter value based on
 * dependencies between protocols and roles.
 * @phba: lpfc_hba pointer.
 **/
void
lpfc_nvme_mod_param_dep(struct lpfc_hba *phba)
{
        int  logit = 0;

        if (phba->cfg_hdw_queue > phba->sli4_hba.num_present_cpu) {
                phba->cfg_hdw_queue = phba->sli4_hba.num_present_cpu;
                logit = 1;
        }
        if (phba->cfg_irq_chann > phba->sli4_hba.num_present_cpu) {
                phba->cfg_irq_chann = phba->sli4_hba.num_present_cpu;
                logit = 1;
        }
        if (phba->cfg_irq_chann > phba->cfg_hdw_queue) {
                phba->cfg_irq_chann = phba->cfg_hdw_queue;
                logit = 1;
        }
        if (logit)
                lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
                                "2006 Reducing Queues - CPU limitation: "
                                "IRQ %d HDWQ %d\n",
                                phba->cfg_irq_chann,
                                phba->cfg_hdw_queue);

        if (phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME &&
            phba->nvmet_support) {
                phba->cfg_enable_fc4_type &= ~LPFC_ENABLE_FCP;

                lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
                                "6013 %s x%x fb_size x%x, fb_max x%x\n",
                                "NVME Target PRLI ACC enable_fb ",
                                phba->cfg_nvme_enable_fb,
                                phba->cfg_nvmet_fb_size,
                                LPFC_NVMET_FB_SZ_MAX);

                if (phba->cfg_nvme_enable_fb == 0)
                        phba->cfg_nvmet_fb_size = 0;
                else {
                        if (phba->cfg_nvmet_fb_size > LPFC_NVMET_FB_SZ_MAX)
                                phba->cfg_nvmet_fb_size = LPFC_NVMET_FB_SZ_MAX;
                }

                if (!phba->cfg_nvmet_mrq)
                        phba->cfg_nvmet_mrq = phba->cfg_hdw_queue;

                /* Adjust lpfc_nvmet_mrq to avoid running out of WQE slots */
                if (phba->cfg_nvmet_mrq > phba->cfg_hdw_queue) {
                        phba->cfg_nvmet_mrq = phba->cfg_hdw_queue;
                        lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC,
                                        "6018 Adjust lpfc_nvmet_mrq to %d\n",
                                        phba->cfg_nvmet_mrq);
                }
                if (phba->cfg_nvmet_mrq > LPFC_NVMET_MRQ_MAX)
                        phba->cfg_nvmet_mrq = LPFC_NVMET_MRQ_MAX;

        } else {
                /* Not NVME Target mode.  Turn off Target parameters. */
                phba->nvmet_support = 0;
                phba->cfg_nvmet_mrq = 0;
                phba->cfg_nvmet_fb_size = 0;
        }
}

/**
 * lpfc_get_vport_cfgparam - Used during port create, init the vport structure
 * @vport: lpfc_vport pointer.
 **/
void
lpfc_get_vport_cfgparam(struct lpfc_vport *vport)
{
        lpfc_log_verbose_init(vport, lpfc_log_verbose);
        lpfc_lun_queue_depth_init(vport, lpfc_lun_queue_depth);
        lpfc_tgt_queue_depth_init(vport, lpfc_tgt_queue_depth);
        lpfc_devloss_tmo_init(vport, lpfc_devloss_tmo);
        lpfc_nodev_tmo_init(vport, lpfc_nodev_tmo);
        lpfc_peer_port_login_init(vport, lpfc_peer_port_login);
        lpfc_restrict_login_init(vport, lpfc_restrict_login);
        lpfc_fcp_class_init(vport, lpfc_fcp_class);
        lpfc_use_adisc_init(vport, lpfc_use_adisc);
        lpfc_first_burst_size_init(vport, lpfc_first_burst_size);
        lpfc_max_scsicmpl_time_init(vport, lpfc_max_scsicmpl_time);
        lpfc_discovery_threads_init(vport, lpfc_discovery_threads);
        lpfc_max_luns_init(vport, lpfc_max_luns);
        lpfc_scan_down_init(vport, lpfc_scan_down);
        lpfc_enable_da_id_init(vport, lpfc_enable_da_id);
        return;
}