lpfc_attr.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2008 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_hw.h"
#include "lpfc_sli.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");
}

/**
 * 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->mb.mbxCommand = MBX_DOWN_LINK;
	pmboxq->mb.mbxOwner = OWN_HOST;

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

	if ((mbxstatus == MBX_SUCCESS) && (pmboxq->mb.mbxStatus == 0)) {
		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 coce 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;
	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_SLI2_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->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_SLI2_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 (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 hexidecimal.
 *
 * 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 hexidecimal.
 * @dev: class device that is converted into a Scsi_host.
 * @attr: device attribute, not used.
 * @buf: on return contains the attribute value in hexidecimal.
 *
 * 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(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 hexidecimal.
 *
 * 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 hexidecimal.
 * @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 hexidecimal.
 *
 * 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 hexidecimal.
 * @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:
#
# LOG_ELS                       0x1        ELS events
# LOG_DISCOVERY                 0x2        Link discovery events
# LOG_MBOX                      0x4        Mailbox events
# LOG_INIT                      0x8        Initialization events
# LOG_LINK_EVENT                0x10       Link events
# LOG_FCP                       0x40       FCP traffic history
# LOG_NODE                      0x80       Node table events
# LOG_MISC                      0x400      Miscellaneous events
# LOG_SLI                       0x800      SLI events
# LOG_FCP_ERROR                 0x1000     Only log FCP errors
# LOG_LIBDFC                    0x2000     LIBDFC events
# LOG_ALL_MSG                   0xffff     LOG all messages
*/
LPFC_VPORT_ATTR_HEX_RW(log_verbose, 0x0, 0x0, 0xffff,
		       "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 int
lpfc_topology_set(struct lpfc_hba *phba, int val)
{
	int err;
	uint32_t prev_val;
	if (val >= 0 && val <= 6) {
		prev_val = phba->cfg_topology;
		phba->cfg_topology = val;
		err = lpfc_issue_lip(lpfc_shost_from_vport(phba->pport));
		if (err)
			phba->cfg_topology = prev_val;
		return err;
	}
	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)
lpfc_param_store(topology)
static DEVICE_ATTR(lpfc_topology, S_IRUGO | S_IWUSR,
		lpfc_topology_show, lpfc_topology_store);

/*
# 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 int
lpfc_link_speed_set(struct lpfc_hba *phba, int val)
{
	int err;
	uint32_t prev_val;

	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 <= LPFC_MAX_LINK_SPEED)
		&& (LPFC_LINK_SPEED_BITMAP & (1 << val))) {
		prev_val = phba->cfg_link_speed;
		phba->cfg_link_speed = val;
		err = lpfc_issue_lip(lpfc_shost_from_vport(phba->pport));
		if (err)
			phba->cfg_link_speed = prev_val;
		return err;
	}

	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;
}

lpfc_param_store(link_speed)
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
#       1  = MSI enabled
#       2  = MSI-X enabled (default)
# Value range is [0,2]. Default value is 2.
*/
LPFC_ATTR_R(use_msi, 2, 0, 2, "Use Message Signaled Interrupts (1) or "
	    "MSI-X (2), if possible");

/*
# lpfc_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_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");

struct device_attribute *lpfc_hba_attrs[] = {
	&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_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_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,
	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_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,
	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 ((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 (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->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;

	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)) {

		switch (phba->sysfs_mbox.mbox->mb.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",
				       phba->sysfs_mbox.mbox->mb.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",
			       phba->sysfs_mbox.mbox->mb.mbxCommand);
			sysfs_mbox_idle(phba);
			spin_unlock_irq(&phba->hbalock);
			return -EPERM;
		default:
			printk(KERN_WARNING "mbox_read: Unknown Command 0x%x\n",
			       phba->sysfs_mbox.mbox->mb.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 &&
		    phba->sysfs_mbox.mbox->mb.mbxCommand != MBX_DUMP_MEMORY &&
		    phba->sysfs_mbox.mbox->mb.mbxCommand != MBX_RESTART &&
		    phba->sysfs_mbox.mbox->mb.mbxCommand != MBX_WRITE_VPARMS &&
		    phba->sysfs_mbox.mbox->mb.mbxCommand != MBX_WRITE_WWN)
			lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX,
					"1259 mbox: Issued mailbox cmd "
					"0x%x while in stopped state.\n",
					phba->sysfs_mbox.mbox->mb.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_SLI2_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,
				    phba->sysfs_mbox.mbox->mb.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 *) & phba->sysfs_mbox.mbox->mb + 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_ctlreg_attr);
	if (error)
		goto out;

	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:
	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_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;
			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_SLI2_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->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_SLI2_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_SLI2_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->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_SLI2_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_SLI2_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)


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,

	/* 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 *),
};

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,

	/* 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,
};

/**
 * 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_enable_hba_reset_init(phba, lpfc_enable_hba_reset);
	lpfc_enable_hba_heartbeat_init(phba, lpfc_enable_hba_heartbeat);
	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);
	/* Also reinitialize the host templates with new values. */
	lpfc_vport_template.sg_tablesize = phba->cfg_sg_seg_cnt;
	lpfc_template.sg_tablesize = phba->cfg_sg_seg_cnt;
	/*
	 * Since the sg_tablesize is module parameter, the sg_dma_buf_size
	 * used to create the sg_dma_buf_pool must be dynamically calculated.
	 * 2 segments are added since the IOCB needs a command and response bde.
	 */
	phba->cfg_sg_dma_buf_size = sizeof(struct fcp_cmnd) +
			sizeof(struct fcp_rsp) +
			((phba->cfg_sg_seg_cnt + 2) * sizeof(struct ulp_bde64));
	lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth);
	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;
}