[safe/jmp/linux-2.6] / drivers / scsi / lpfc / lpfc_attr.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2009 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 <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 "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

#define LPFC_MAX_LINK_SPEED 8
#define LPFC_LINK_SPEED_BITMAP 0x00000117
#define LPFC_LINK_SPEED_STRING "0, 1, 2, 4, 8"

/**
 * 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");
}

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;
        char fwrev[32];

        lpfc_decode_firmware_rev(phba, fwrev, 1);
        return snprintf(buf, PAGE_SIZE, "%s, sli-%d\n", fwrev, phba->sli_rev);
}

/**
 * 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:
                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 == 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_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);
        }

        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;

        init_completion(&online_compl);
        lpfc_workq_post_event(phba, &status, &online_compl,
                              LPFC_EVT_OFFLINE_PREP);
        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 (pring->txcmplq_cnt) {
                        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);
        lpfc_workq_post_event(phba, &status, &online_compl, type);
        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.
 *
 * Returns:
 * lpfc_do_offline() return code if not zero
 * -EIO reset not configured or error posting the event
 * zero for success
 **/
static int
lpfc_selective_reset(struct lpfc_hba *phba)
{
        struct completion online_compl;
        int status = 0;

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

        status = lpfc_do_offline(phba, LPFC_EVT_OFFLINE);

        if (status != 0)
                return status;

        init_completion(&online_compl);
        lpfc_workq_post_event(phba, &status, &online_compl,
                              LPFC_EVT_ONLINE);
        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 succcess
 *
 * 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 (strncmp(buf, "selective", sizeof("selective") - 1) == 0)
                status = lpfc_selective_reset(phba);

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

/**
 * 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;
        int status=0;

        if (!phba->cfg_enable_hba_reset)
                return -EACCES;
        init_completion(&online_compl);

        if(strncmp(buf, "online", sizeof("online") - 1) == 0) {
                lpfc_workq_post_event(phba, &status, &online_compl,
                                      LPFC_EVT_ONLINE);
                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)
                status = lpfc_do_offline(phba, LPFC_EVT_WARM_START);
        else if (strncmp(buf, "error", sizeof("error") - 1) == 0)
                status = lpfc_do_offline(phba, LPFC_EVT_KILL);
        else
                return -EINVAL;

        if (!status)
                return strlen(buf);
        else
                return -EIO;
}

/**
 * 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_sli *psli = &phba->sli;
        struct lpfc_mbx_read_config *rd_config;
        LPFC_MBOXQ_t *pmboxq;
        MAILBOX_t *pmb;
        int rc = 0;

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

        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)) {
                        creg_val = readl(phba->HCregaddr);
                        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);
                creg_val = readl(phba->HCregaddr);
                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_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;\
        int 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;\
        int val = 0;\
        val = phba->cfg_##attr;\
        return snprintf(buf, PAGE_SIZE, "%#x\n",\
                        phba->cfg_##attr);\
}

/**
 * lpfc_param_init - Intializes 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, int 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, int val) \
{ \
        if (val >= minval && val <= maxval) {\
                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;\
        int 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;\
        int 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;\
        int 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, int 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, int val) \
{ \
        if (val >= minval && val <= maxval) {\
                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;\
        int 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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
MODULE_PARM_DESC(lpfc_##name, desc);\
lpfc_param_init(name, defval, minval, maxval)

#define LPFC_ATTR_R(name, defval, minval, maxval, desc) \
static int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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 int lpfc_##name = defval;\
module_param(lpfc_##name, int, 0);\
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, lpfc_link_state_show, NULL);
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(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 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];

        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++) {
                if ((*buf >= 'a') && (*buf <= 'f'))
                        j = ((j << 4) | ((*buf++ -'a') + 10));
                else if ((*buf >= 'A') && (*buf <= 'F'))
                        j = ((j << 4) | ((*buf++ -'A') + 10));
                else if ((*buf >= '0') && (*buf <= '9'))
                        j = ((j << 4) | (*buf++ -'0'));
                else
                        return -EINVAL;
                if (i % 2) {
                        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);
        lpfc_workq_post_event(phba, &stat2, &online_compl, LPFC_EVT_ONLINE);
        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++) {
                if ((*buf >= 'a') && (*buf <= 'f'))
                        j = ((j << 4) | ((*buf++ -'a') + 10));
                else if ((*buf >= 'A') && (*buf <= 'F'))
                        j = ((j << 4) | ((*buf++ -'A') + 10));
                else if ((*buf >= '0') && (*buf <= '9'))
                        j = ((j << 4) | (*buf++ -'0'));
                else
                        return -EINVAL;
                if (i % 2) {
                        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, 0);
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, 0);
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 = 0;
module_param(lpfc_enable_npiv, int, 0);
MODULE_PARM_DESC(lpfc_enable_npiv, "Enable NPIV functionality");
lpfc_param_show(enable_npiv);
lpfc_param_init(enable_npiv, 0, 0, 1);
static DEVICE_ATTR(lpfc_enable_npiv, S_IRUGO,
                         lpfc_enable_npiv_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;
        int val = 0;
        val = vport->cfg_devloss_tmo;
        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;
                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, 0);
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;
                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, 0, 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 [1,128]. Default value is 30.
*/
LPFC_VPORT_ATTR_R(lun_queue_depth, 30, 1, 128,
                  "Max number of FCP commands we can queue to a specific LUN");

/*
# 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, 0);
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 (nolip)
                        return strlen(buf);

                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, 0);
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);
        }

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

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


/**
 * lpfc_stat_data_ctrl_show - Read function for lpfc_stat_data_ctrl sysfs file
 * @dev: Pointer to class device object.
 * @buf: Data buffer.
 *
 * This function is the read call back function for
 * lpfc_stat_data_ctrl sysfs file. This function report the
 * current statistical data collection state.
 **/
static ssize_t
lpfc_stat_data_ctrl_show(struct device *dev, struct device_attribute *attr,
                         char *buf)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int index = 0;
        int i;
        char *bucket_type;
        unsigned long bucket_value;

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

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

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

/*
 * Sysfs attribute to control the statistical data collection.
 */
static DEVICE_ATTR(lpfc_stat_data_ctrl, S_IRUGO | S_IWUSR,
                   lpfc_stat_data_ctrl_show, lpfc_stat_data_ctrl_store);

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

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


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

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

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

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

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

                if (!ndlp->lat_data)
                        continue;

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

                index = strlen(buf);

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

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

/*
# lpfc_link_speed: Link speed selection for initializing the Fibre Channel
# connection.
#       0  = auto select (default)
#       1  = 1 Gigabaud
#       2  = 2 Gigabaud
#       4  = 4 Gigabaud
#       8  = 8 Gigabaud
# Value range is [0,8]. Default value is 0.
*/

/**
 * lpfc_link_speed_set - Set the adapters link speed
 * @phba: lpfc_hba pointer.
 * @val: link speed value.
 *
 * Description:
 * If val is in a valid range then set the adapter's link speed field and
 * issue a lip; if the lip fails reset the link speed to the old value.
 *
 * Notes:
 * If the value is not in range log a kernel error message and return an error.
 *
 * Returns:
 * zero if val is in range and lip okay.
 * non-zero return value from lpfc_issue_lip()
 * -EINVAL val out of range
 **/
static ssize_t
lpfc_link_speed_store(struct device *dev, struct device_attribute *attr,
                const char *buf, size_t count)
{
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int val = 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 == LINK_SPEED_1G) && !(phba->lmt & LMT_1Gb)) ||
                ((val == LINK_SPEED_2G) && !(phba->lmt & LMT_2Gb)) ||
                ((val == LINK_SPEED_4G) && !(phba->lmt & LMT_4Gb)) ||
                ((val == LINK_SPEED_8G) && !(phba->lmt & LMT_8Gb)) ||
                ((val == LINK_SPEED_10G) && !(phba->lmt & LMT_10Gb)))
                return -EINVAL;

        if ((val >= 0 && val <= 8)
                && (LPFC_LINK_SPEED_BITMAP & (1 << val))) {
                prev_val = phba->cfg_link_speed;
                phba->cfg_link_speed = val;
                if (nolip)
                        return strlen(buf);

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

        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                "%d:0469 lpfc_link_speed attribute cannot be set to %d, "
                "allowed range is [0, 8]\n",
                phba->brd_no, val);
        return -EINVAL;
}

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

/**
 * lpfc_link_speed_init - Set the adapters link speed
 * @phba: lpfc_hba pointer.
 * @val: link speed value.
 *
 * Description:
 * If val is in a valid range then set the adapter's link speed field.
 *
 * Notes:
 * If the value is not in range log a kernel error message, clear the link
 * speed and return an error.
 *
 * Returns:
 * zero if val saved.
 * -EINVAL val out of range
 **/
static int
lpfc_link_speed_init(struct lpfc_hba *phba, int val)
{
        if ((val >= 0 && val <= LPFC_MAX_LINK_SPEED)
                && (LPFC_LINK_SPEED_BITMAP & (1 << val))) {
                phba->cfg_link_speed = val;
                return 0;
        }
        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                        "0405 lpfc_link_speed attribute cannot "
                        "be set to %d, allowed values are "
                        "["LPFC_LINK_SPEED_STRING"]\n", val);
        phba->cfg_link_speed = 0;
        return -EINVAL;
}

static DEVICE_ATTR(lpfc_link_speed, S_IRUGO | S_IWUSR,
                lpfc_link_speed_show, lpfc_link_speed_store);

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

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

/*
# lpfc_max_scsicmpl_time: Use scsi command completion time to control I/O queue
# depth. Default value is 0. When the value of this parameter is zero the
# SCSI command completion time is not used for controlling I/O queue depth. When
# the parameter is set to a non-zero value, the I/O queue depth is controlled
# to limit the I/O completion time to the parameter value.
# The value is set in milliseconds.
*/
static int lpfc_max_scsicmpl_time;
module_param(lpfc_max_scsicmpl_time, int, 0);
MODULE_PARM_DESC(lpfc_max_scsicmpl_time,
        "Use command completion time to control queue depth");
lpfc_vport_param_show(max_scsicmpl_time);
lpfc_vport_param_init(max_scsicmpl_time, 0, 0, 60000);
static int
lpfc_max_scsicmpl_time_set(struct lpfc_vport *vport, int val)
{
        struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
        struct lpfc_nodelist *ndlp, *next_ndlp;

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

        spin_lock_irq(shost->host_lock);
        list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
                if (!NLP_CHK_NODE_ACT(ndlp))
                        continue;
                if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
                        continue;
                ndlp->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
        }
        spin_unlock_irq(shost->host_lock);
        return 0;
}
lpfc_vport_param_store(max_scsicmpl_time);
static DEVICE_ATTR(lpfc_max_scsicmpl_time, S_IRUGO | S_IWUSR,
                   lpfc_max_scsicmpl_time_show,
                   lpfc_max_scsicmpl_time_store);

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

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

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

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

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

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

/*
# lpfc_fdmi_on: controls FDMI support.
#       0 = no FDMI support
#       1 = support FDMI without attribute of hostname
#       2 = support FDMI with attribute of hostname
# Value range [0,2]. Default value is 0.
*/
LPFC_VPORT_ATTR_RW(fdmi_on, 0, 0, 2, "Enable FDMI support");

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

/*
# lpfc_max_luns: maximum allowed LUN.
# Value range is [0,65535]. Default value is 255.
# NOTE: The SCSI layer might probe all allowed LUN on some old targets.
*/
LPFC_VPORT_ATTR_R(max_luns, 255, 0, 65535, "Maximum allowed LUN");

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

/*
# lpfc_use_msi: Use MSI (Message Signaled Interrupts) in systems that
#               support this feature
#       0  = MSI disabled (default)
#       1  = MSI enabled
#       2  = MSI-X enabled
# Value range is [0,2]. Default value is 0.
*/
LPFC_ATTR_R(use_msi, 0, 0, 2, "Use Message Signaled Interrupts (1) or "
            "MSI-X (2), if possible");

/*
# lpfc_fcp_imax: Set the maximum number of fast-path FCP interrupts per second
#
# Value range is [636,651042]. Default value is 10000.
*/
LPFC_ATTR_R(fcp_imax, LPFC_FP_DEF_IMAX, LPFC_MIM_IMAX, LPFC_DMULT_CONST,
            "Set the maximum number of fast-path FCP interrupts per second");

/*
# lpfc_fcp_wq_count: Set the number of fast-path FCP work queues
#
# Value range is [1,31]. Default value is 4.
*/
LPFC_ATTR_R(fcp_wq_count, LPFC_FP_WQN_DEF, LPFC_FP_WQN_MIN, LPFC_FP_WQN_MAX,
            "Set the number of fast-path FCP work queues, if possible");

/*
# lpfc_fcp_eq_count: Set the number of fast-path FCP event queues
#
# Value range is [1,7]. Default value is 1.
*/
LPFC_ATTR_R(fcp_eq_count, LPFC_FP_EQN_DEF, LPFC_FP_EQN_MIN, LPFC_FP_EQN_MAX,
            "Set the number of fast-path FCP event queues, if possible");

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

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

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

/*
# lpfc_enable_fip: When set, FIP is required to start discovery. If not
# set, the driver will add an FCF record manually if the port has no
# FCF records available and start discovery.
# Value range is [0,1]. Default value is 1 (enabled)
*/
LPFC_ATTR_RW(enable_fip, 0, 0, 1, "Enable FIP Discovery");


/*
# lpfc_prot_mask: i
#       - Bit mask of host protection capabilities used to register with the
#         SCSI mid-layer
#       - Only meaningful if BG is turned on (lpfc_enable_bg=1).
#       - Allows you to ultimately specify which profiles to use
#       - Default will result in registering capabilities for all profiles.
#
*/
unsigned int lpfc_prot_mask =   SHOST_DIX_TYPE0_PROTECTION;

module_param(lpfc_prot_mask, uint, 0);
MODULE_PARM_DESC(lpfc_prot_mask, "host protection mask");

/*
# lpfc_prot_guard: i
#       - Bit mask of protection guard types to register with the SCSI mid-layer
#       - Guard types are currently either 1) IP checksum 2) T10-DIF CRC
#       - Allows you to ultimately specify which profiles to use
#       - Default will result in registering capabilities for all guard types
#
*/
unsigned char lpfc_prot_guard = SHOST_DIX_GUARD_IP;
module_param(lpfc_prot_guard, byte, 0);
MODULE_PARM_DESC(lpfc_prot_guard, "host protection guard type");


/*
 * lpfc_sg_seg_cnt - Initial Maximum DMA Segment Count
 * This value can be set to values between 64 and 256. The default value is
 * 64, but may be increased to allow for larger Max I/O sizes. The scsi layer
 * will be allowed to request I/Os of sizes up to (MAX_SEG_COUNT * SEG_SIZE).
 */
LPFC_ATTR_R(sg_seg_cnt, LPFC_DEFAULT_SG_SEG_CNT, LPFC_DEFAULT_SG_SEG_CNT,
            LPFC_MAX_SG_SEG_CNT, "Max Scatter Gather Segment Count");

LPFC_ATTR_R(prot_sg_seg_cnt, LPFC_DEFAULT_PROT_SG_SEG_CNT,
                LPFC_DEFAULT_PROT_SG_SEG_CNT, LPFC_MAX_PROT_SG_SEG_CNT,
                "Max Protection Scatter Gather Segment Count");

struct device_attribute *lpfc_hba_attrs[] = {
        &dev_attr_bg_info,
        &dev_attr_bg_guard_err,
        &dev_attr_bg_apptag_err,
        &dev_attr_bg_reftag_err,
        &dev_attr_info,
        &dev_attr_serialnum,
        &dev_attr_modeldesc,
        &dev_attr_modelname,
        &dev_attr_programtype,
        &dev_attr_portnum,
        &dev_attr_fwrev,
        &dev_attr_hdw,
        &dev_attr_option_rom_version,
        &dev_attr_link_state,
        &dev_attr_num_discovered_ports,
        &dev_attr_menlo_mgmt_mode,
        &dev_attr_lpfc_drvr_version,
        &dev_attr_lpfc_temp_sensor,
        &dev_attr_lpfc_log_verbose,
        &dev_attr_lpfc_lun_queue_depth,
        &dev_attr_lpfc_hba_queue_depth,
        &dev_attr_lpfc_peer_port_login,
        &dev_attr_lpfc_nodev_tmo,
        &dev_attr_lpfc_devloss_tmo,
        &dev_attr_lpfc_enable_fip,
        &dev_attr_lpfc_fcp_class,
        &dev_attr_lpfc_use_adisc,
        &dev_attr_lpfc_ack0,
        &dev_attr_lpfc_topology,
        &dev_attr_lpfc_scan_down,
        &dev_attr_lpfc_link_speed,
        &dev_attr_lpfc_cr_delay,
        &dev_attr_lpfc_cr_count,
        &dev_attr_lpfc_multi_ring_support,
        &dev_attr_lpfc_multi_ring_rctl,
        &dev_attr_lpfc_multi_ring_type,
        &dev_attr_lpfc_fdmi_on,
        &dev_attr_lpfc_max_luns,
        &dev_attr_lpfc_enable_npiv,
        &dev_attr_nport_evt_cnt,
        &dev_attr_board_mode,
        &dev_attr_max_vpi,
        &dev_attr_used_vpi,
        &dev_attr_max_rpi,
        &dev_attr_used_rpi,
        &dev_attr_max_xri,
        &dev_attr_used_xri,
        &dev_attr_npiv_info,
        &dev_attr_issue_reset,
        &dev_attr_lpfc_poll,
        &dev_attr_lpfc_poll_tmo,
        &dev_attr_lpfc_use_msi,
        &dev_attr_lpfc_fcp_imax,
        &dev_attr_lpfc_fcp_wq_count,
        &dev_attr_lpfc_fcp_eq_count,
        &dev_attr_lpfc_enable_bg,
        &dev_attr_lpfc_soft_wwnn,
        &dev_attr_lpfc_soft_wwpn,
        &dev_attr_lpfc_soft_wwn_enable,
        &dev_attr_lpfc_enable_hba_reset,
        &dev_attr_lpfc_enable_hba_heartbeat,
        &dev_attr_lpfc_sg_seg_cnt,
        &dev_attr_lpfc_max_scsicmpl_time,
        &dev_attr_lpfc_stat_data_ctrl,
        &dev_attr_lpfc_prot_sg_seg_cnt,
        NULL,
};

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

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

        if (phba->sli_rev >= LPFC_SLI_REV4)
                return -EPERM;

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

        if (count == 0) return 0;

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

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

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

        spin_unlock_irq(&phba->hbalock);

        return count;
}

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

        if (phba->sli_rev >= LPFC_SLI_REV4)
                return -EPERM;

        if (off > FF_REG_AREA_SIZE)
                return -ERANGE;

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

        if (count == 0) return 0;

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

        spin_lock_irq(&phba->hbalock);

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

        spin_unlock_irq(&phba->hbalock);

        return count;
}

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

/**
 * sysfs_mbox_idle - frees the sysfs mailbox
 * @phba: lpfc_hba pointer
 **/
static void
sysfs_mbox_idle(struct lpfc_hba *phba)
{
        phba->sysfs_mbox.state = SMBOX_IDLE;
        phba->sysfs_mbox.offset = 0;

        if (phba->sysfs_mbox.mbox) {
                mempool_free(phba->sysfs_mbox.mbox,
                             phba->mbox_mem_pool);
                phba->sysfs_mbox.mbox = NULL;
        }
}

/**
 * sysfs_mbox_write - Write method for writing information via mbox
 * @kobj: kernel kobject that contains the kernel class device.
 * @bin_attr: kernel attributes passed to us.
 * @buf: contains the data to be written to sysfs mbox.
 * @off: offset into buffer to beginning of data.
 * @count: bytes to transfer.
 *
 * Description:
 * Accessed via /sys/class/scsi_host/hostxxx/mbox.
 * Uses the sysfs mbox to send buf contents to the adapter.
 *
 * Returns:
 * -ERANGE off and count combo out of range
 * -EINVAL off, count or buff address invalid
 * zero if count is zero
 * -EPERM adapter is offline
 * -ENOMEM failed to allocate memory for the mail box
 * -EAGAIN offset, state or mbox is NULL
 * count number of bytes transferred
 **/
static ssize_t
sysfs_mbox_write(struct kobject *kobj, struct bin_attribute *bin_attr,
                 char *buf, loff_t off, size_t count)
{
        struct device *dev = container_of(kobj, struct device, kobj);
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        struct lpfcMboxq  *mbox = NULL;

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

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

        if (count == 0)
                return 0;

        if (off == 0) {
                mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
                if (!mbox)
                        return -ENOMEM;
                memset(mbox, 0, sizeof (LPFC_MBOXQ_t));
        }

        spin_lock_irq(&phba->hbalock);

        if (off == 0) {
                if (phba->sysfs_mbox.mbox)
                        mempool_free(mbox, phba->mbox_mem_pool);
                else
                        phba->sysfs_mbox.mbox = mbox;
                phba->sysfs_mbox.state = SMBOX_WRITING;
        } else {
                if (phba->sysfs_mbox.state  != SMBOX_WRITING ||
                    phba->sysfs_mbox.offset != off           ||
                    phba->sysfs_mbox.mbox   == NULL) {
                        sysfs_mbox_idle(phba);
                        spin_unlock_irq(&phba->hbalock);
                        return -EAGAIN;
                }
        }

        memcpy((uint8_t *) &phba->sysfs_mbox.mbox->u.mb + off,
               buf, count);

        phba->sysfs_mbox.offset = off + count;

        spin_unlock_irq(&phba->hbalock);

        return count;
}

/**
 * sysfs_mbox_read - Read method for reading information via mbox
 * @kobj: kernel kobject that contains the kernel class device.
 * @bin_attr: kernel attributes passed to us.
 * @buf: contains the data to be read from sysfs mbox.
 * @off: offset into buffer to beginning of data.
 * @count: bytes to transfer.
 *
 * Description:
 * Accessed via /sys/class/scsi_host/hostxxx/mbox.
 * Uses the sysfs mbox to receive data from to the adapter.
 *
 * Returns:
 * -ERANGE off greater than mailbox command size
 * -EINVAL off, count or buff address invalid
 * zero if off and count are zero
 * -EACCES adapter over temp
 * -EPERM garbage can value to catch a multitude of errors
 * -EAGAIN management IO not permitted, state or off error
 * -ETIME mailbox timeout
 * -ENODEV mailbox error
 * count number of bytes transferred
 **/
static ssize_t
sysfs_mbox_read(struct kobject *kobj, struct bin_attribute *bin_attr,
                char *buf, loff_t off, size_t count)
{
        struct device *dev = container_of(kobj, struct device, kobj);
        struct Scsi_Host  *shost = class_to_shost(dev);
        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
        struct lpfc_hba   *phba = vport->phba;
        int rc;
        MAILBOX_t *pmb;

        if (off > MAILBOX_CMD_SIZE)
                return -ERANGE;

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

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

        if (off && count == 0)
                return 0;

        spin_lock_irq(&phba->hbalock);

        if (phba->over_temp_state == HBA_OVER_TEMP) {
                sysfs_mbox_idle(phba);
                spin_unlock_irq(&phba->hbalock);
                return  -EACCES;
        }

        if (off == 0 &&
            phba->sysfs_mbox.state  == SMBOX_WRITING &&
            phba->sysfs_mbox.offset >= 2 * sizeof(uint32_t)) {
                pmb = &phba->sysfs_mbox.mbox->u.mb;
                switch (pmb->mbxCommand) {
                        /* Offline only */
                case MBX_INIT_LINK:
                case MBX_DOWN_LINK:
                case MBX_CONFIG_LINK:
                case MBX_CONFIG_RING:
                case MBX_RESET_RING:
                case MBX_UNREG_LOGIN:
                case MBX_CLEAR_LA:
                case MBX_DUMP_CONTEXT:
                case MBX_RUN_DIAGS:
                case MBX_RESTART:
                case MBX_SET_MASK:
                case MBX_SET_DEBUG:
                        if (!(vport->fc_flag & FC_OFFLINE_MODE)) {
                                printk(KERN_WARNING "mbox_read:Command 0x%x "
                                       "is illegal in on-line state\n",
                                       pmb->mbxCommand);
                                sysfs_mbox_idle(phba);
                                spin_unlock_irq(&phba->hbalock);
                                return -EPERM;
                        }
                case MBX_WRITE_NV:
                case MBX_WRITE_VPARMS:
                case MBX_LOAD_SM:
                case MBX_READ_NV:
                case MBX_READ_CONFIG:
                case MBX_READ_RCONFIG:
                case MBX_READ_STATUS:
                case MBX_READ_XRI:
                case MBX_READ_REV:
                case MBX_READ_LNK_STAT:
                case MBX_DUMP_MEMORY:
                case MBX_DOWN_LOAD:
                case MBX_UPDATE_CFG:
                case MBX_KILL_BOARD:
                case MBX_LOAD_AREA:
                case MBX_LOAD_EXP_ROM:
                case MBX_BEACON:
                case MBX_DEL_LD_ENTRY:
                case MBX_SET_VARIABLE:
                case MBX_WRITE_WWN:
                case MBX_PORT_CAPABILITIES:
                case MBX_PORT_IOV_CONTROL:
                        break;
                case MBX_READ_SPARM64:
                case MBX_READ_LA:
                case MBX_READ_LA64:
                case MBX_REG_LOGIN:
                case MBX_REG_LOGIN64:
                case MBX_CONFIG_PORT:
                case MBX_RUN_BIU_DIAG:
                        printk(KERN_WARNING "mbox_read: Illegal Command 0x%x\n",
                               pmb->mbxCommand);
                        sysfs_mbox_idle(phba);
                        spin_unlock_irq(&phba->hbalock);
                        return -EPERM;
                default:
                        printk(KERN_WARNING "mbox_read: Unknown Command 0x%x\n",
                               pmb->mbxCommand);
                        sysfs_mbox_idle(phba);
                        spin_unlock_irq(&phba->hbalock);
                        return -EPERM;
                }

                /* If HBA encountered an error attention, allow only DUMP
                 * or RESTART mailbox commands until the HBA is restarted.
                 */
                if (phba->pport->stopped &&
                    pmb->mbxCommand != MBX_DUMP_MEMORY &&
                    pmb->mbxCommand != MBX_RESTART &&
                    pmb->mbxCommand != MBX_WRITE_VPARMS &&
                    pmb->mbxCommand != MBX_WRITE_WWN)
                        lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX,
                                        "1259 mbox: Issued mailbox cmd "
                                        "0x%x while in stopped state.\n",
                                        pmb->mbxCommand);

                phba->sysfs_mbox.mbox->vport = vport;

                /* Don't allow mailbox commands to be sent when blocked
                 * or when in the middle of discovery
                 */
                if (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO) {
                        sysfs_mbox_idle(phba);
                        spin_unlock_irq(&phba->hbalock);
                        return  -EAGAIN;
                }

                if ((vport->fc_flag & FC_OFFLINE_MODE) ||
                    (!(phba->sli.sli_flag & LPFC_SLI_ACTIVE))) {

                        spin_unlock_irq(&phba->hbalock);
                        rc = lpfc_sli_issue_mbox (phba,
                                                  phba->sysfs_mbox.mbox,
                                                  MBX_POLL);
                        spin_lock_irq(&phba->hbalock);

                } else {
                        spin_unlock_irq(&phba->hbalock);
                        rc = lpfc_sli_issue_mbox_wait (phba,
                                                       phba->sysfs_mbox.mbox,
                                lpfc_mbox_tmo_val(phba, pmb->mbxCommand) * HZ);
                        spin_lock_irq(&phba->hbalock);
                }

                if (rc != MBX_SUCCESS) {
                        if (rc == MBX_TIMEOUT) {
                                phba->sysfs_mbox.mbox = NULL;
                        }
                        sysfs_mbox_idle(phba);
                        spin_unlock_irq(&phba->hbalock);
                        return  (rc == MBX_TIMEOUT) ? -ETIME : -ENODEV;
                }
                phba->sysfs_mbox.state = SMBOX_READING;
        }
        else if (phba->sysfs_mbox.offset != off ||
                 phba->sysfs_mbox.state  != SMBOX_READING) {
                printk(KERN_WARNING  "mbox_read: Bad State\n");
                sysfs_mbox_idle(phba);
                spin_unlock_irq(&phba->hbalock);
                return -EAGAIN;
        }

        memcpy(buf, (uint8_t *) &pmb + off, count);

        phba->sysfs_mbox.offset = off + count;

        if (phba->sysfs_mbox.offset == MAILBOX_CMD_SIZE)
                sysfs_mbox_idle(phba);

        spin_unlock_irq(&phba->hbalock);

        return count;
}

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

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

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

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

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

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

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

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


/*
 * Dynamic FC Host Attributes Support
 */

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

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

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

        spin_lock_irq(shost->host_lock);

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

        spin_unlock_irq(shost->host_lock);
}

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

        spin_lock_irq(shost->host_lock);

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

        spin_unlock_irq(shost->host_lock);
}

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

        spin_lock_irq(shost->host_lock);

        if (lpfc_is_link_up(phba)) {
                switch(phba->fc_linkspeed) {
                        case LA_1GHZ_LINK:
                                fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
                        break;
                        case LA_2GHZ_LINK:
                                fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
                        break;
                        case LA_4GHZ_LINK:
                                fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
                        break;
                        case LA_8GHZ_LINK:
                                fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
                        break;
                        case LA_10GHZ_LINK:
                                fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
                        break;
                        default:
                                fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
                        break;
                }
        } else
                fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;

        spin_unlock_irq(shost->host_lock);
}

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

        spin_lock_irq(shost->host_lock);

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

        spin_unlock_irq(shost->host_lock);

        fc_host_fabric_name(shost) = node_name;
}

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

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

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

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

        pmb = &pmboxq->u.mb;
        pmb->mbxCommand = MBX_READ_STATUS;
        pmb->mbxOwner = OWN_HOST;
        pmboxq->context1 = NULL;
        pmboxq->vport = vport;

        if ((vport->fc_flag & FC_OFFLINE_MODE) ||
                (!(psli->sli_flag & LPFC_SLI_ACTIVE)))
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        else
                rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

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

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

        hs->tx_frames = pmb->un.varRdStatus.xmitFrameCnt;
        hs->tx_words = (pmb->un.varRdStatus.xmitByteCnt * 256);
        hs->rx_frames = pmb->un.varRdStatus.rcvFrameCnt;
        hs->rx_words = (pmb->un.varRdStatus.rcvByteCnt * 256);

        memset(pmboxq, 0, sizeof (LPFC_MBOXQ_t));
        pmb->mbxCommand = MBX_READ_LNK_STAT;
        pmb->mbxOwner = OWN_HOST;
        pmboxq->context1 = NULL;
        pmboxq->vport = vport;

        if ((vport->fc_flag & FC_OFFLINE_MODE) ||
            (!(psli->sli_flag & LPFC_SLI_ACTIVE)))
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        else
                rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

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

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

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

        if (phba->fc_topology == TOPOLOGY_LOOP) {
                hs->lip_count = (phba->fc_eventTag >> 1);
                hs->lip_count -= lso->link_events;
                hs->nos_count = -1;
        } else {
                hs->lip_count = -1;
                hs->nos_count = (phba->fc_eventTag >> 1);
                hs->nos_count -= lso->link_events;
        }

        hs->dumped_frames = -1;

        seconds = get_seconds();
        if (seconds < psli->stats_start)
                hs->seconds_since_last_reset = seconds +
                                ((unsigned long)-1 - psli->stats_start);
        else
                hs->seconds_since_last_reset = seconds - psli->stats_start;

        mempool_free(pmboxq, phba->mbox_mem_pool);

        return hs;
}

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

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

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

        pmb = &pmboxq->u.mb;
        pmb->mbxCommand = MBX_READ_STATUS;
        pmb->mbxOwner = OWN_HOST;
        pmb->un.varWords[0] = 0x1; /* reset request */
        pmboxq->context1 = NULL;
        pmboxq->vport = vport;

        if ((vport->fc_flag & FC_OFFLINE_MODE) ||
                (!(psli->sli_flag & LPFC_SLI_ACTIVE)))
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        else
                rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

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

        memset(pmboxq, 0, sizeof(LPFC_MBOXQ_t));
        pmb->mbxCommand = MBX_READ_LNK_STAT;
        pmb->mbxOwner = OWN_HOST;
        pmboxq->context1 = NULL;
        pmboxq->vport = vport;

        if ((vport->fc_flag & FC_OFFLINE_MODE) ||
            (!(psli->sli_flag & LPFC_SLI_ACTIVE)))
                rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
        else
                rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

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

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

        psli->stats_start = get_seconds();

        mempool_free(pmboxq, phba->mbox_mem_pool);

        return;
}

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

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

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

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

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

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

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

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

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

/**
 * lpfc_set_rport_loss_tmo - Set the rport dev loss tmo
 * @rport: fc rport address.
 * @timeout: new value for dev loss tmo.
 *
 * Description:
 * If timeout is non zero set the dev_loss_tmo to timeout, else set
 * dev_loss_tmo to one.
 **/
static void
lpfc_set_rport_loss_tmo(struct fc_rport *rport, uint32_t timeout)
{
        if (timeout)
                rport->dev_loss_tmo = timeout;
        else
                rport->dev_loss_tmo = 1;
}

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

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

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

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

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

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

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

        .get_host_port_type = lpfc_get_host_port_type,
        .show_host_port_type = 1,

        .get_host_port_state = lpfc_get_host_port_state,
        .show_host_port_state = 1,

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

        .get_host_speed = lpfc_get_host_speed,
        .show_host_speed = 1,

        .get_host_fabric_name = lpfc_get_host_fabric_name,
        .show_host_fabric_name = 1,

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

        .get_fc_host_stats = lpfc_get_stats,
        .reset_fc_host_stats = lpfc_reset_stats,

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

        .set_rport_dev_loss_tmo = lpfc_set_rport_loss_tmo,
        .show_rport_dev_loss_tmo = 1,

        .get_starget_port_id  = lpfc_get_starget_port_id,
        .show_starget_port_id = 1,

        .get_starget_node_name = lpfc_get_starget_node_name,
        .show_starget_node_name = 1,

        .get_starget_port_name = lpfc_get_starget_port_name,
        .show_starget_port_name = 1,

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

        .dd_fcvport_size = sizeof(struct lpfc_vport *),

        .vport_disable = lpfc_vport_disable,

        .set_vport_symbolic_name = lpfc_set_vport_symbolic_name,
};

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

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

        .get_host_port_type = lpfc_get_host_port_type,
        .show_host_port_type = 1,

        .get_host_port_state = lpfc_get_host_port_state,
        .show_host_port_state = 1,

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

        .get_host_speed = lpfc_get_host_speed,
        .show_host_speed = 1,

        .get_host_fabric_name = lpfc_get_host_fabric_name,
        .show_host_fabric_name = 1,

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

        .get_fc_host_stats = lpfc_get_stats,
        .reset_fc_host_stats = lpfc_reset_stats,

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

        .set_rport_dev_loss_tmo = lpfc_set_rport_loss_tmo,
        .show_rport_dev_loss_tmo = 1,

        .get_starget_port_id  = lpfc_get_starget_port_id,
        .show_starget_port_id = 1,

        .get_starget_node_name = lpfc_get_starget_node_name,
        .show_starget_node_name = 1,

        .get_starget_port_name = lpfc_get_starget_port_name,
        .show_starget_port_name = 1,

        .dev_loss_tmo_callbk = lpfc_dev_loss_tmo_callbk,
        .terminate_rport_io = lpfc_terminate_rport_io,

        .vport_disable = lpfc_vport_disable,

        .set_vport_symbolic_name = lpfc_set_vport_symbolic_name,
};

/**
 * lpfc_get_cfgparam - Used during probe_one to init the adapter structure
 * @phba: lpfc_hba pointer.
 **/
void
lpfc_get_cfgparam(struct lpfc_hba *phba)
{
        lpfc_cr_delay_init(phba, lpfc_cr_delay);
        lpfc_cr_count_init(phba, lpfc_cr_count);
        lpfc_multi_ring_support_init(phba, lpfc_multi_ring_support);
        lpfc_multi_ring_rctl_init(phba, lpfc_multi_ring_rctl);
        lpfc_multi_ring_type_init(phba, lpfc_multi_ring_type);
        lpfc_ack0_init(phba, lpfc_ack0);
        lpfc_topology_init(phba, lpfc_topology);
        lpfc_link_speed_init(phba, lpfc_link_speed);
        lpfc_poll_tmo_init(phba, lpfc_poll_tmo);
        lpfc_enable_npiv_init(phba, lpfc_enable_npiv);
        lpfc_use_msi_init(phba, lpfc_use_msi);
        lpfc_fcp_imax_init(phba, lpfc_fcp_imax);
        lpfc_fcp_wq_count_init(phba, lpfc_fcp_wq_count);
        lpfc_fcp_eq_count_init(phba, lpfc_fcp_eq_count);
        lpfc_enable_hba_reset_init(phba, lpfc_enable_hba_reset);
        lpfc_enable_hba_heartbeat_init(phba, lpfc_enable_hba_heartbeat);
        lpfc_enable_bg_init(phba, lpfc_enable_bg);
        phba->cfg_poll = lpfc_poll;
        phba->cfg_soft_wwnn = 0L;
        phba->cfg_soft_wwpn = 0L;
        lpfc_sg_seg_cnt_init(phba, lpfc_sg_seg_cnt);
        lpfc_prot_sg_seg_cnt_init(phba, lpfc_prot_sg_seg_cnt);
        lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth);
        lpfc_enable_fip_init(phba, lpfc_enable_fip);
        lpfc_hba_log_verbose_init(phba, lpfc_log_verbose);

        return;
}

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