/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2013 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/aer.h>
#include <linux/gfp.h>
#include <linux/kernel.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/fc/fc_fs.h>

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

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

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

/**
 * 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_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;

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

/**
 * 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_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;
}

/**
 * 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_sli_ring *pring;
        struct lpfc_sli *psli;
        int status = 0;
        int cnt = 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.
         */
        for (i = 0; i < psli->num_rings; i++) {
                pring = &psli->ring[i];
                while (!list_empty(&pring->txcmplq)) {
                        msleep(10);
                        if (cnt++ > 500) {  /* 5 secs */
                                lpfc_printf_log(phba,
                                        KERN_WARNING, LOG_INIT,
                                        "0466 Outstanding IO when "
                                        "bringing Adapter offline\n");
                                break;
                        }
                }
        }

        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;
        }

        status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);

        if (status != 0)
                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);
}

/**
 * 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;\
        uint val = 0;\
        val = phba->cfg_##attr;\
        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 (val >= minval && val <= 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 (val >= minval && val <= 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;\
        uint val = 0;\
        val = vport->cfg_##attr;\
        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;\
        uint val = 0;\
        val = vport->cfg_##attr;\
        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 (val >= minval && val <= 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 (val >= minval && val <= 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;\
}


#define LPFC_ATTR(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_init(name, defval, minval, maxval)

#define LPFC_ATTR_R(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_show(name)\
lpfc_param_init(name, defval, minval, maxval)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)

#define LPFC_ATTR_RW(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_show(name)\
lpfc_param_init(name, defval, minval, maxval)\
lpfc_param_set(name, defval, minval, maxval)\
lpfc_param_store(name)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                   lpfc_##name##_show, lpfc_##name##_store)

#define LPFC_ATTR_HEX_R(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_hex_show(name)\
lpfc_param_init(name, defval, minval, maxval)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)

#define LPFC_ATTR_HEX_RW(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_hex_show(name)\
lpfc_param_init(name, defval, minval, maxval)\
lpfc_param_set(name, defval, minval, maxval)\
lpfc_param_store(name)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                   lpfc_##name##_show, lpfc_##name##_store)

#define LPFC_VPORT_ATTR(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_vport_param_init(name, defval, minval, maxval)

#define LPFC_VPORT_ATTR_R(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_vport_param_show(name)\
lpfc_vport_param_init(name, defval, minval, maxval)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)

#define LPFC_VPORT_ATTR_RW(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_vport_param_show(name)\
lpfc_vport_param_init(name, defval, minval, maxval)\
lpfc_vport_param_set(name, defval, minval, maxval)\
lpfc_vport_param_store(name)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                   lpfc_##name##_show, lpfc_##name##_store)

#define LPFC_VPORT_ATTR_HEX_R(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_vport_param_hex_show(name)\
lpfc_vport_param_init(name, defval, minval, maxval)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)

#define LPFC_VPORT_ATTR_HEX_RW(name, defval, minval, maxval, desc) \
static uint lpfc_##name = defval;\
module_param(lpfc_##name, uint, S_IRUGO);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_vport_param_hex_show(name)\
lpfc_vport_param_init(name, defval, minval, maxval)\
lpfc_vport_param_set(name, defval, minval, maxval)\

lpfc_vport_param_store(name)\
static DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                   lpfc_##name##_show, lpfc_##name##_store)

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 char *lpfc_soft_wwn_key = "C99G71SL8032A";

/**
 * 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;
        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 i, j, cnt=count;
        u8 wwpn[8];
        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 || (cnt < 16) || (cnt > 18) ||
            ((cnt == 17) && (*buf++ != 'x')) ||
            ((cnt == 18) && ((*buf++ != '0') || (*buf++ != 'x'))))
                return -EINVAL;

        phba->soft_wwn_enable = 0;

        memset(wwpn, 0, sizeof(wwpn));

        /* Validate and store the new name */
        for (i=0, j=0; i < 16; i++) {
                int value;

                value = hex_to_bin(*buf++);
                if (value >= 0)
                        j = (j << 4) | value;
                else
                        return -EINVAL;
                if (i % 2) {
                        wwpn[i/2] = j & 0xff;
                        j = 0;
                }
        }
        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 i, j, cnt=count;
        u8 wwnn[8];

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

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

        /*
         * Allow wwnn to be set many times, as long as the enable is set.
         * However, once the wwpn is set, everything locks.
         */

        memset(wwnn, 0, sizeof(wwnn));

        /* Validate and store the new name */
        for (i=0, j=0; i < 16; i++) {
                int value;

                value = hex_to_bin(*buf++);
                if (value >= 0)
                        j = (j << 4) | value;
                else
                        return -EINVAL;
                if (i % 2) {
                        wwnn[i/2] = j & 0xff;
                        j = 0;
                }
        }
        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);


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

static DEVICE_ATTR(lpfc_poll, S_IRUGO | S_IWUSR,
                   lpfc_poll_show, lpfc_poll_store);

int  lpfc_sli_mode = 0;
module_param(lpfc_sli_mode, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_sli_mode, "SLI mode selector:"
                 " 0 - auto (SLI-3 if supported),"
                 " 2 - select SLI-2 even on SLI-3 capable HBAs,"
                 " 3 - select SLI-3");

int lpfc_enable_npiv = 1;
module_param(lpfc_enable_npiv, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_enable_npiv, "Enable NPIV functionality");
lpfc_param_show(enable_npiv);
lpfc_param_init(enable_npiv, 1, 0, 1);
static DEVICE_ATTR(lpfc_enable_npiv, S_IRUGO, lpfc_enable_npiv_show, NULL);

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

int lpfc_enable_rrq = 2;
module_param(lpfc_enable_rrq, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_enable_rrq, "Enable RRQ functionality");
lpfc_param_show(enable_rrq);
/*
# lpfc_enable_rrq: Track XRI/OXID reuse after IO failures
#       0x0 = disabled, XRI/OXID use not tracked.
#       0x1 = XRI/OXID reuse is timed with ratov, RRQ sent.
#       0x2 = XRI/OXID reuse is timed with ratov, No RRQ sent.
*/
lpfc_param_init(enable_rrq, 2, 0, 2);
static DEVICE_ATTR(lpfc_enable_rrq, S_IRUGO, lpfc_enable_rrq_show, NULL);

/*
# lpfc_suppress_link_up:  Bring link up at initialization
#            0x0  = bring link up (issue MBX_INIT_LINK)
#            0x1  = do NOT bring link up at initialization(MBX_INIT_LINK)
#            0x2  = never bring up link
# Default value is 0.
*/
LPFC_ATTR_R(suppress_link_up, LPFC_INITIALIZE_LINK, LPFC_INITIALIZE_LINK,
                LPFC_DELAY_INIT_LINK_INDEFINITELY,
                "Suppress Link Up at initialization");
/*
# lpfc_cnt: Number of IOCBs allocated for ELS, CT, and ABTS
#       1 - (1024)
#       2 - (2048)
#       3 - (3072)
#       4 - (4096)
#       5 - (5120)
*/
static ssize_t
lpfc_iocb_hw_show(struct device *dev, struct device_attribute *attr, char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;

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

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

        return snprintf(buf, PAGE_SIZE, "%d\n",
                phba->sli.ring[LPFC_ELS_RING].txq_max);
}

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

        return snprintf(buf, PAGE_SIZE, "%d\n",
                phba->sli.ring[LPFC_ELS_RING].txcmplq_max);
}

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

int lpfc_iocb_cnt = 2;
module_param(lpfc_iocb_cnt, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_iocb_cnt,
        "Number of IOCBs alloc for ELS, CT, and ABTS: 1k to 5k IOCBs");
lpfc_param_show(iocb_cnt);
lpfc_param_init(iocb_cnt, 2, 1, 5);
static DEVICE_ATTR(lpfc_iocb_cnt, S_IRUGO,
                         lpfc_iocb_cnt_show, NULL);

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

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

        return snprintf(buf, PAGE_SIZE, "%d\n", vport->cfg_devloss_tmo);
}

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

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

/**
 * lpfc_update_rport_devloss_tmo - Update dev loss tmo value
 * @vport: lpfc vport structure pointer.
 *
 * Description:
 * Update all the ndlp's dev loss tmo with the vport devloss tmo value.
 **/
static void
lpfc_update_rport_devloss_tmo(struct lpfc_vport *vport)
{
        struct Scsi_Host  *shost;
        struct lpfc_nodelist  *ndlp;

        shost = lpfc_shost_from_vport(vport);
        spin_lock_irq(shost->host_lock);
        list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp)
                if (NLP_CHK_NODE_ACT(ndlp) && ndlp->rport)
                        ndlp->rport->dev_loss_tmo = vport->cfg_devloss_tmo;
        spin_unlock_irq(shost->host_lock);
}

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

lpfc_vport_param_store(nodev_tmo)

static DEVICE_ATTR(lpfc_nodev_tmo, S_IRUGO | S_IWUSR,
                   lpfc_nodev_tmo_show, lpfc_nodev_tmo_store);

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

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

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

lpfc_vport_param_store(devloss_tmo)
static DEVICE_ATTR(lpfc_devloss_tmo, S_IRUGO | S_IWUSR,
                   lpfc_devloss_tmo_show, lpfc_devloss_tmo_store);

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

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

/*
# lun_queue_depth:  This parameter is used to limit the number of outstanding
# commands per FCP LUN. Value range is [1,512]. Default value is 30.
# If this parameter value is greater than 1/8th the maximum number of exchanges
# supported by the HBA port, then the lun queue depth will be reduced to
# 1/8th the maximum number of exchanges.
*/
LPFC_VPORT_ATTR_R(lun_queue_depth, 30, 1, 512,
                  "Max number of FCP commands we can queue to a specific LUN");

/*
# tgt_queue_depth:  This parameter is used to limit the number of outstanding
# commands per target port. Value range is [10,65535]. Default value is 65535.
*/
LPFC_VPORT_ATTR_R(tgt_queue_depth, 65535, 10, 65535,
                  "Max number of FCP commands we can queue to a specific target port");

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

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

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

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

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

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

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

/**
 * lpfc_topology_set - Set the adapters topology field
 * @phba: lpfc_hba pointer.
 * @val: topology value.
 *
 * Description:
 * If val is in a valid range then set the adapter's topology field and
 * issue a lip; if the lip fails reset the topology to the old value.
 *
 * If the value is not in range log a kernel error message and return an error.
 *
 * Returns:
 * zero if val is in range and lip okay
 * non-zero return value from lpfc_issue_lip()
 * -EINVAL val out of range
 **/
static ssize_t
lpfc_topology_store(struct device *dev, struct device_attribute *attr,
                        const char *buf, size_t count)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int val = 0;
        int nolip = 0;
        const char *val_buf = buf;
        int err;
        uint32_t prev_val;

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

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

        if (val >= 0 && val <= 6) {
                prev_val = phba->cfg_topology;
                phba->cfg_topology = val;
                if (phba->cfg_link_speed == LPFC_USER_LINK_SPEED_16G &&
                        val == 4) {
                        lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                                "3113 Loop mode not supported at speed %d\n",
                                phba->cfg_link_speed);
                        phba->cfg_topology = prev_val;
                        return -EINVAL;
                }
                if (nolip)
                        return strlen(buf);

                lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
                        "3054 lpfc_topology changed from %d to %d\n",
                        prev_val, val);
                if (prev_val != val && phba->sli_rev == LPFC_SLI_REV4)
                        phba->fc_topology_changed = 1;
                err = lpfc_issue_lip(lpfc_shost_from_vport(phba->pport));
                if (err) {
                        phba->cfg_topology = prev_val;
                        return -EINVAL;
                } else
                        return strlen(buf);
        }
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                "%d:0467 lpfc_topology attribute cannot be set to %d, "
                "allowed range is [0, 6]\n",
                phba->brd_no, val);
        return -EINVAL;
}
static int lpfc_topology = 0;
module_param(lpfc_topology, int, S_IRUGO);
MODULE_PARM_DESC(lpfc_topology, "Select Fibre Channel topology");
lpfc_param_show(topology)
lpfc_param_init(topology, 0, 0, 6)
static DEVICE_ATTR(lpfc_topology, S_IRUGO | S_IWUSR,
                lpfc_topology_show, lpfc_topology_store);

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

        return strlen(buf);
}

/*
 * Sysfs attribute to control the statistical data collection.
 */
static DEVICE_ATTR(lpfc_static_vport, S_IRUGO,
                   lpfc_static_vport_show, NULL);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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