/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2017 Broadcom. All Rights Reserved. The term      *
 * “Broadcom” refers to Broadcom Limited 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 <linux/nvme-fc-driver.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_nvmet.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

#define LPFC_DEF_MRQ_POST       256
#define LPFC_MIN_MRQ_POST       32
#define LPFC_MAX_MRQ_POST       512

/*
 * 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"

/**
 * 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 snprintf(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 snprintf(buf, PAGE_SIZE, "1\n");
        else
                return snprintf(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 nvme_fc_remote_port *nrport;
        char *statep;
        int len = 0;

        if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_NVME)) {
                len += snprintf(buf, PAGE_SIZE, "NVME Disabled\n");
                return len;
        }
        if (phba->nvmet_support) {
                if (!phba->targetport) {
                        len = snprintf(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";
                len += snprintf(buf + len, PAGE_SIZE - len,
                                "NVME Target: Enabled  State %s\n",
                                statep);
                len += snprintf(buf + len, PAGE_SIZE - len,
                                "%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);

                len += snprintf(buf + len, PAGE_SIZE,
                                "\nNVME Target: Statistics\n");
                tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
                len += snprintf(buf+len, PAGE_SIZE-len,
                                "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 (atomic_read(&tgtp->rcv_ls_req_in) !=
                    atomic_read(&tgtp->rcv_ls_req_out)) {
                        len += snprintf(buf+len, PAGE_SIZE-len,
                                        "Rcv LS: in %08x != out %08x\n",
                                        atomic_read(&tgtp->rcv_ls_req_in),
                                        atomic_read(&tgtp->rcv_ls_req_out));
                }

                len += snprintf(buf+len, PAGE_SIZE-len,
                                "LS: Xmt %08x Drop %08x Cmpl %08x Err %08x\n",
                                atomic_read(&tgtp->xmt_ls_rsp),
                                atomic_read(&tgtp->xmt_ls_drop),
                                atomic_read(&tgtp->xmt_ls_rsp_cmpl),
                                atomic_read(&tgtp->xmt_ls_rsp_error));

                len += snprintf(buf+len, PAGE_SIZE-len,
                                "FCP: Rcv %08x Drop %08x\n",
                                atomic_read(&tgtp->rcv_fcp_cmd_in),
                                atomic_read(&tgtp->rcv_fcp_cmd_drop));

                if (atomic_read(&tgtp->rcv_fcp_cmd_in) !=
                    atomic_read(&tgtp->rcv_fcp_cmd_out)) {
                        len += snprintf(buf+len, PAGE_SIZE-len,
                                        "Rcv FCP: in %08x != out %08x\n",
                                        atomic_read(&tgtp->rcv_fcp_cmd_in),
                                        atomic_read(&tgtp->rcv_fcp_cmd_out));
                }

                len += snprintf(buf+len, PAGE_SIZE-len,
                                "FCP Rsp: RD %08x rsp %08x WR %08x rsp %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));

                len += snprintf(buf+len, PAGE_SIZE-len,
                                "FCP Rsp: abort %08x drop %08x\n",
                                atomic_read(&tgtp->xmt_fcp_abort),
                                atomic_read(&tgtp->xmt_fcp_drop));

                len += snprintf(buf+len, PAGE_SIZE-len,
                                "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));

                len += snprintf(buf+len, PAGE_SIZE-len,
                                "ABORT: Xmt %08x Err %08x Cmpl %08x",
                                atomic_read(&tgtp->xmt_abort_rsp),
                                atomic_read(&tgtp->xmt_abort_rsp_error),
                                atomic_read(&tgtp->xmt_abort_cmpl));

                len +=  snprintf(buf+len, PAGE_SIZE-len, "\n");
                return len;
        }

        localport = vport->localport;
        if (!localport) {
                len = snprintf(buf, PAGE_SIZE,
                                "NVME Initiator x%llx is not allocated\n",
                                wwn_to_u64(vport->fc_portname.u.wwn));
                return len;
        }
        len = snprintf(buf, PAGE_SIZE, "NVME Initiator Enabled\n");

        spin_lock_irq(shost->host_lock);
        lport = (struct lpfc_nvme_lport *)localport->private;

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

        len += snprintf(buf + len, PAGE_SIZE - len,
                        "%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);

        list_for_each_entry(rport, &lport->rport_list, list) {
                /* local short-hand pointer. */
                nrport = rport->remoteport;

                /* 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. */
                len += snprintf(buf + len, PAGE_SIZE - len,
                                "NVME RPORT       ");
                if (phba->brd_no >= 10)
                        len += snprintf(buf + len, PAGE_SIZE - len, " ");

                len += snprintf(buf + len, PAGE_SIZE - len, "WWPN x%llx ",
                                nrport->port_name);
                len += snprintf(buf + len, PAGE_SIZE - len, "WWNN x%llx ",
                                nrport->node_name);
                len += snprintf(buf + len, PAGE_SIZE - len, "DID x%06x ",
                                nrport->port_id);

                switch (nrport->port_role) {
                case FC_PORT_ROLE_NVME_INITIATOR:
                        len +=  snprintf(buf + len, PAGE_SIZE - len,
                                         "INITIATOR ");
                        break;
                case FC_PORT_ROLE_NVME_TARGET:
                        len +=  snprintf(buf + len, PAGE_SIZE - len,
                                         "TARGET ");
                        break;
                case FC_PORT_ROLE_NVME_DISCOVERY:
                        len +=  snprintf(buf + len, PAGE_SIZE - len,
                                         "DISCOVERY ");
                        break;
                default:
                        len +=  snprintf(buf + len, PAGE_SIZE - len,
                                         "UNKNOWN_ROLE x%x",
                                         nrport->port_role);
                        break;
                }
                len +=  snprintf(buf + len, PAGE_SIZE - len, "%s  ", statep);
                /* Terminate the string. */
                len +=  snprintf(buf + len, PAGE_SIZE - len, "\n");
        }
        spin_unlock_irq(shost->host_lock);

        len += snprintf(buf + len, PAGE_SIZE, "\nNVME Statistics\n");
        len += snprintf(buf+len, PAGE_SIZE-len,
                        "LS: Xmt %016llx Cmpl %016llx\n",
                        phba->fc4NvmeLsRequests,
                        phba->fc4NvmeLsCmpls);

        len += snprintf(buf+len, PAGE_SIZE-len,
                        "FCP: Rd %016llx Wr %016llx IO %016llx\n",
                        phba->fc4NvmeInputRequests,
                        phba->fc4NvmeOutputRequests,
                        phba->fc4NvmeControlRequests);

        len += snprintf(buf+len, PAGE_SIZE-len,
                        "    Cmpl %016llx\n", phba->fc4NvmeIoCmpls);

        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 snprintf(buf, PAGE_SIZE, "BlockGuard Enabled\n");
                else
                        return snprintf(buf, PAGE_SIZE,
                                        "BlockGuard Not Supported\n");
        else
                        return snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 = snprintf(buf, PAGE_SIZE, "%s, sli-%d\n",
                               fwrev, phba->sli_rev);
        else
                len = snprintf(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 snprintf(buf, PAGE_SIZE, "%s\n", hdw);
}

/**
 * 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 snprintf(buf, PAGE_SIZE, "%s\n", phba->OptionROMVersion);

        lpfc_decode_firmware_rev(phba, fwrev, 1);
        return snprintf(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 += snprintf(buf + len, PAGE_SIZE-len,
                                "Link Down - User disabled\n");
                else
                        len += snprintf(buf + len, PAGE_SIZE-len,
                                "Link Down\n");
                break;
        case LPFC_LINK_UP:
        case LPFC_CLEAR_LA:
        case LPFC_HBA_READY:
                len += snprintf(buf + len, PAGE_SIZE-len, "Link Up - ");

                switch (vport->port_state) {
                case LPFC_LOCAL_CFG_LINK:
                        len += snprintf(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 += snprintf(buf + len, PAGE_SIZE - len,
                                        "Discovery\n");
                        break;
                case LPFC_VPORT_READY:
                        len += snprintf(buf + len, PAGE_SIZE - len, "Ready\n");
                        break;

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

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

        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 snprintf(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 snprintf(buf, PAGE_SIZE, "fcoe\n");
                if (phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_FC)
                        return snprintf(buf, PAGE_SIZE, "fc\n");
        }
        return snprintf(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 snprintf(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 snprintf(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 ((vport->fc_flag & FC_OFFLINE_MODE) ||
            (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;

        /* 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:
        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_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);
        lpfc_readl(phba->sli4_hba.u.if_type2.STATUSregaddr,
                   &portstat_reg.word0);

        /* 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);
                lpfc_readl(phba->sli4_hba.u.if_type2.STATUSregaddr,
                           &portstat_reg.word0);
                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.
 *
 * 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 snprintf(buf, PAGE_SIZE, "%d\n", phba->nport_event_cnt);
}

/**
 * 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 snprintf(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);
        } 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
                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->context1 = 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;

                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)
                        *avpi = pmb->un.varRdConfig.avail_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 snprintf(buf, PAGE_SIZE, "%d\n", cnt);
        return snprintf(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 snprintf(buf, PAGE_SIZE, "%d\n", (cnt - acnt));
        return snprintf(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 snprintf(buf, PAGE_SIZE, "%d\n", cnt);
        return snprintf(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 snprintf(buf, PAGE_SIZE, "%d\n", (cnt - acnt));
        return snprintf(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 snprintf(buf, PAGE_SIZE, "%d\n", cnt);
        return snprintf(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 snprintf(buf, PAGE_SIZE, "%d\n", (cnt - acnt));
        return snprintf(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 snprintf(buf, PAGE_SIZE, "NPIV Not Supported\n");
        if (vport->port_type == LPFC_PHYSICAL_PORT)
                return snprintf(buf, PAGE_SIZE, "NPIV Physical\n");
        return snprintf(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 snprintf(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_fips_level_show - Return the current FIPS level for 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_fips_level_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 snprintf(buf, PAGE_SIZE, "%d\n", phba->fips_level);
}

/**
 * lpfc_fips_rev_show - Return the FIPS Spec revision for 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_fips_rev_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 snprintf(buf, PAGE_SIZE, "%d\n", phba->fips_spec_rev);
}

/**
 * lpfc_dss_show - Return the current state of dss and the configured state
 * @dev: class converted to a Scsi_host structure.
 * @attr: device attribute, not used.
 * @buf: on return contains the formatted text.
 *
 * Returns: size of formatted string.
 **/
static ssize_t
lpfc_dss_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 snprintf(buf, PAGE_SIZE, "%s - %sOperational\n",
                        (phba->cfg_enable_dss) ? "Enabled" : "Disabled",
                        (phba->sli3_options & LPFC_SLI3_DSS_ENABLED) ?
                                "" : "Not ");
}

/**
 * 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 snprintf(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_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 snprintf(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 snprintf(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 snprintf(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 snprintf(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(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(lpfc_drvr_version, S_IRUGO, lpfc_drvr_version_show, NULL);
static DEVICE_ATTR(lpfc_enable_fip, S_IRUGO, lpfc_enable_fip_show, NULL);
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(lpfc_temp_sensor, S_IRUGO, lpfc_temp_sensor_show, NULL);
static DEVICE_ATTR(lpfc_fips_level, S_IRUGO, lpfc_fips_level_show, NULL);
static DEVICE_ATTR(lpfc_fips_rev, S_IRUGO, lpfc_fips_rev_show, NULL);
static DEVICE_ATTR(lpfc_dss, S_IRUGO, lpfc_dss_show, NULL);
static DEVICE_ATTR(lpfc_sriov_hw_max_virtfn, S_IRUGO,
                   lpfc_sriov_hw_max_virtfn_show, NULL);
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;

        /*
         * 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.
         */

        /* 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(lpfc_soft_wwn_enable, S_IWUSR, NULL,
                   lpfc_soft_wwn_enable_store);

/**
 * 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 snprintf(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(lpfc_soft_wwpn, S_IRUGO | S_IWUSR,
                   lpfc_soft_wwpn_show, lpfc_soft_wwpn_store);

/**
 * 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 snprintf(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
 * @cdev: class device that is converted into a Scsi_host.
 * @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(lpfc_soft_wwnn, S_IRUGO | S_IWUSR,
                   lpfc_soft_wwnn_show, lpfc_soft_wwnn_store);

/**
 * 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 snprintf(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 snprintf(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 snprintf(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 snprintf(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 snprintf(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.
 * @ndlp: pointer to fcp target node.
 * @lun: the fc lun for setting oas state.
 * @oas_state: the oas state to be set to the lun.
 *
 * 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
 *
 * 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.
 *
 * 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 += snprintf(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.
 *
 * 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);