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lpfc_attr.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2007 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

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;
}

static ssize_t
lpfc_drvr_version_show(struct class_device *cdev, char *buf)
{
      return snprintf(buf, PAGE_SIZE, LPFC_MODULE_DESC "\n");
}

static ssize_t
lpfc_info_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host *host = class_to_shost(cdev);

      return snprintf(buf, PAGE_SIZE, "%s\n",lpfc_info(host));
}

static ssize_t
lpfc_serialnum_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_hba   *phba = vport->phba;

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

static ssize_t
lpfc_modeldesc_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_hba   *phba = vport->phba;

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

static ssize_t
lpfc_modelname_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_hba   *phba = vport->phba;

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

static ssize_t
lpfc_programtype_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_hba   *phba = vport->phba;

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

static ssize_t
lpfc_vportnum_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_hba   *phba = vport->phba;

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

static ssize_t
lpfc_fwrev_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}

static ssize_t
lpfc_hdw_show(struct class_device *cdev, char *buf)
{
      char hdw[9];
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}
static ssize_t
lpfc_option_rom_version_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_hba   *phba = vport->phba;

      return snprintf(buf, PAGE_SIZE, "%s\n", phba->OptionROMVersion);
}
static ssize_t
lpfc_state_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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 - \n");

            switch (vport->port_state) {
                  len += snprintf(buf + len, PAGE_SIZE-len,
                              "initializing\n");
                  break;
            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->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;
}

static ssize_t
lpfc_num_discovered_ports_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;

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


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) ||
          (vport->port_state != LPFC_VPORT_READY))
            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;
}

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;

      for (i = 0; i < psli->num_rings; i++) {
            pring = &psli->ring[i];
            /* The linkdown event takes 30 seconds to timeout. */
            while (pring->txcmplq_cnt) {
                  msleep(10);
                  if (cnt++ > 3000) {
                        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;
}

static int
lpfc_selective_reset(struct lpfc_hba *phba)
{
      struct completion online_compl;
      int status = 0;

      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;
}

static ssize_t
lpfc_issue_reset(struct class_device *cdev, const char *buf, size_t count)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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;
}

static ssize_t
lpfc_nport_evt_cnt_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}

static ssize_t
lpfc_board_mode_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}

static ssize_t
lpfc_board_mode_store(struct class_device *cdev, const char *buf, size_t count)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_hba   *phba = vport->phba;
      struct completion online_compl;
      int status=0;

      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;
}

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;
}

static ssize_t
lpfc_max_rpi_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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");
}

static ssize_t
lpfc_used_rpi_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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");
}

static ssize_t
lpfc_max_xri_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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");
}

static ssize_t
lpfc_used_xri_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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");
}

static ssize_t
lpfc_max_vpi_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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");
}

static ssize_t
lpfc_used_vpi_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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");
}

static ssize_t
lpfc_npiv_info_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}

static ssize_t
lpfc_poll_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}

static ssize_t
lpfc_poll_store(struct class_device *cdev, const char *buf,
            size_t count)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}

#define lpfc_param_show(attr) \
static ssize_t \
lpfc_##attr##_show(struct class_device *cdev, char *buf) \
{ \
      struct Scsi_Host  *shost = class_to_shost(cdev);\
      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);\
}

#define lpfc_param_hex_show(attr)   \
static ssize_t \
lpfc_##attr##_show(struct class_device *cdev, char *buf) \
{ \
      struct Scsi_Host  *shost = class_to_shost(cdev);\
      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);\
}

#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;\
}

#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;\
}

#define lpfc_param_store(attr)      \
static ssize_t \
lpfc_##attr##_store(struct class_device *cdev, const char *buf, size_t count) \
{ \
      struct Scsi_Host  *shost = class_to_shost(cdev);\
      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;\
}

#define lpfc_vport_param_show(attr) \
static ssize_t \
lpfc_##attr##_show(struct class_device *cdev, char *buf) \
{ \
      struct Scsi_Host  *shost = class_to_shost(cdev);\
      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);\
}

#define lpfc_vport_param_hex_show(attr)   \
static ssize_t \
lpfc_##attr##_show(struct class_device *cdev, char *buf) \
{ \
      struct Scsi_Host  *shost = class_to_shost(cdev);\
      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);\
}

#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, \
                   "0449 lpfc_"#attr" attribute cannot be set to %d, "\
                   "allowed range is ["#minval", "#maxval"]\n", val); \
      vport->cfg_##attr = default;\
      return -EINVAL;\
}

#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, \
                   "0450 lpfc_"#attr" attribute cannot be set to %d, "\
                   "allowed range is ["#minval", "#maxval"]\n", val); \
      return -EINVAL;\
}

#define lpfc_vport_param_store(attr)      \
static ssize_t \
lpfc_##attr##_store(struct class_device *cdev, const char *buf, size_t count) \
{ \
      struct Scsi_Host  *shost = class_to_shost(cdev);\
      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 CLASS_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 CLASS_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 CLASS_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 CLASS_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 CLASS_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 CLASS_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 CLASS_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 CLASS_DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                   lpfc_##name##_show, lpfc_##name##_store)

static CLASS_DEVICE_ATTR(info, S_IRUGO, lpfc_info_show, NULL);
static CLASS_DEVICE_ATTR(serialnum, S_IRUGO, lpfc_serialnum_show, NULL);
static CLASS_DEVICE_ATTR(modeldesc, S_IRUGO, lpfc_modeldesc_show, NULL);
static CLASS_DEVICE_ATTR(modelname, S_IRUGO, lpfc_modelname_show, NULL);
static CLASS_DEVICE_ATTR(programtype, S_IRUGO, lpfc_programtype_show, NULL);
static CLASS_DEVICE_ATTR(portnum, S_IRUGO, lpfc_vportnum_show, NULL);
static CLASS_DEVICE_ATTR(fwrev, S_IRUGO, lpfc_fwrev_show, NULL);
static CLASS_DEVICE_ATTR(hdw, S_IRUGO, lpfc_hdw_show, NULL);
static CLASS_DEVICE_ATTR(state, S_IRUGO, lpfc_state_show, NULL);
static CLASS_DEVICE_ATTR(option_rom_version, S_IRUGO,
                              lpfc_option_rom_version_show, NULL);
static CLASS_DEVICE_ATTR(num_discovered_ports, S_IRUGO,
                              lpfc_num_discovered_ports_show, NULL);
static CLASS_DEVICE_ATTR(nport_evt_cnt, S_IRUGO, lpfc_nport_evt_cnt_show, NULL);
static CLASS_DEVICE_ATTR(lpfc_drvr_version, S_IRUGO, lpfc_drvr_version_show,
                   NULL);
static CLASS_DEVICE_ATTR(board_mode, S_IRUGO | S_IWUSR,
                   lpfc_board_mode_show, lpfc_board_mode_store);
static CLASS_DEVICE_ATTR(issue_reset, S_IWUSR, NULL, lpfc_issue_reset);
static CLASS_DEVICE_ATTR(max_vpi, S_IRUGO, lpfc_max_vpi_show, NULL);
static CLASS_DEVICE_ATTR(used_vpi, S_IRUGO, lpfc_used_vpi_show, NULL);
static CLASS_DEVICE_ATTR(max_rpi, S_IRUGO, lpfc_max_rpi_show, NULL);
static CLASS_DEVICE_ATTR(used_rpi, S_IRUGO, lpfc_used_rpi_show, NULL);
static CLASS_DEVICE_ATTR(max_xri, S_IRUGO, lpfc_max_xri_show, NULL);
static CLASS_DEVICE_ATTR(used_xri, S_IRUGO, lpfc_used_xri_show, NULL);
static CLASS_DEVICE_ATTR(npiv_info, S_IRUGO, lpfc_npiv_info_show, NULL);


static char *lpfc_soft_wwn_key = "C99G71SL8032A";

static ssize_t
lpfc_soft_wwn_enable_store(struct class_device *cdev, const char *buf,
                        size_t count)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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 CLASS_DEVICE_ATTR(lpfc_soft_wwn_enable, S_IWUSR, NULL,
                        lpfc_soft_wwn_enable_store);

static ssize_t
lpfc_soft_wwpn_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}


static ssize_t
lpfc_soft_wwpn_store(struct class_device *cdev, const char *buf, size_t count)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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];

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

static ssize_t
lpfc_soft_wwnn_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host *shost = class_to_shost(cdev);
      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);
}


static ssize_t
lpfc_soft_wwnn_store(struct class_device *cdev, const char *buf, size_t count)
{
      struct Scsi_Host *shost = class_to_shost(cdev);
      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 CLASS_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 CLASS_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");

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

/*
# 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");
static ssize_t
lpfc_nodev_tmo_show(struct class_device *cdev, char *buf)
{
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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);
}

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,
                               "0402 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;
}

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 (ndlp->rport)
                  ndlp->rport->dev_loss_tmo = vport->cfg_devloss_tmo;
      spin_unlock_irq(shost->host_lock);
}

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 CLASS_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)
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 CLASS_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");

/*
# 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);

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,
                         "0449 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;
}

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,
                         "0450 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 CLASS_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_ATTR_RW(topology, 0, 0, 6, "Select Fibre Channel topology");

/*
# 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_ATTR_R(link_speed, 0, 0, 8, "Select link speed");

/*
# 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_ack0: Use ACK0, instead of ACK1 for class 2 acknowledgement. Value
# range is [0,1]. Default value is 0.
*/
LPFC_ATTR_R(ack0, 0, 0, 1, "Enable ACK0 support");

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

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

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

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

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

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

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

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

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

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



struct class_device_attribute *lpfc_hba_attrs[] = {
      &class_device_attr_info,
      &class_device_attr_serialnum,
      &class_device_attr_modeldesc,
      &class_device_attr_modelname,
      &class_device_attr_programtype,
      &class_device_attr_portnum,
      &class_device_attr_fwrev,
      &class_device_attr_hdw,
      &class_device_attr_option_rom_version,
      &class_device_attr_state,
      &class_device_attr_num_discovered_ports,
      &class_device_attr_lpfc_drvr_version,
      &class_device_attr_lpfc_log_verbose,
      &class_device_attr_lpfc_lun_queue_depth,
      &class_device_attr_lpfc_hba_queue_depth,
      &class_device_attr_lpfc_peer_port_login,
      &class_device_attr_lpfc_nodev_tmo,
      &class_device_attr_lpfc_devloss_tmo,
      &class_device_attr_lpfc_fcp_class,
      &class_device_attr_lpfc_use_adisc,
      &class_device_attr_lpfc_ack0,
      &class_device_attr_lpfc_topology,
      &class_device_attr_lpfc_scan_down,
      &class_device_attr_lpfc_link_speed,
      &class_device_attr_lpfc_cr_delay,
      &class_device_attr_lpfc_cr_count,
      &class_device_attr_lpfc_multi_ring_support,
      &class_device_attr_lpfc_multi_ring_rctl,
      &class_device_attr_lpfc_multi_ring_type,
      &class_device_attr_lpfc_fdmi_on,
      &class_device_attr_lpfc_max_luns,
      &class_device_attr_lpfc_enable_npiv,
      &class_device_attr_nport_evt_cnt,
      &class_device_attr_board_mode,
      &class_device_attr_max_vpi,
      &class_device_attr_used_vpi,
      &class_device_attr_max_rpi,
      &class_device_attr_used_rpi,
      &class_device_attr_max_xri,
      &class_device_attr_used_xri,
      &class_device_attr_npiv_info,
      &class_device_attr_issue_reset,
      &class_device_attr_lpfc_poll,
      &class_device_attr_lpfc_poll_tmo,
      &class_device_attr_lpfc_use_msi,
      &class_device_attr_lpfc_soft_wwnn,
      &class_device_attr_lpfc_soft_wwpn,
      &class_device_attr_lpfc_soft_wwn_enable,
      NULL,
};

struct class_device_attribute *lpfc_vport_attrs[] = {
      &class_device_attr_info,
      &class_device_attr_state,
      &class_device_attr_num_discovered_ports,
      &class_device_attr_lpfc_drvr_version,

      &class_device_attr_lpfc_log_verbose,
      &class_device_attr_lpfc_lun_queue_depth,
      &class_device_attr_lpfc_nodev_tmo,
      &class_device_attr_lpfc_devloss_tmo,
      &class_device_attr_lpfc_hba_queue_depth,
      &class_device_attr_lpfc_peer_port_login,
      &class_device_attr_lpfc_restrict_login,
      &class_device_attr_lpfc_fcp_class,
      &class_device_attr_lpfc_use_adisc,
      &class_device_attr_lpfc_fdmi_on,
      &class_device_attr_lpfc_max_luns,
      &class_device_attr_nport_evt_cnt,
      &class_device_attr_npiv_info,
      NULL,
};

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 class_device *cdev = container_of(kobj, struct class_device,
                                     kobj);
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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;
}

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 class_device *cdev = container_of(kobj, struct class_device,
                                     kobj);
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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,
};


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;
      }
}

static ssize_t
sysfs_mbox_write(struct kobject *kobj, struct bin_attribute *bin_attr,
             char *buf, loff_t off, size_t count)
{
      struct class_device *cdev = container_of(kobj, struct class_device,
                                     kobj);
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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;
}

static ssize_t
sysfs_mbox_read(struct kobject *kobj, struct bin_attribute *bin_attr,
            char *buf, loff_t off, size_t count)
{
      struct class_device *cdev = container_of(kobj, struct class_device,
                                     kobj);
      struct Scsi_Host  *shost = class_to_shost(cdev);
      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 (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_WRITE_NV:
            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_FLASH_WR_ULA:
            case MBX_SET_MASK:
            case MBX_SET_SLIM:
            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_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:
                  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;
            }

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

            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,
};

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_classdev.kobj,
                              &sysfs_ctlreg_attr);
      if (error)
            goto out;

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

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

void
lpfc_free_sysfs_attr(struct lpfc_vport *vport)
{
      struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

      sysfs_remove_bin_file(&shost->shost_classdev.kobj, &sysfs_mbox_attr);
      sysfs_remove_bin_file(&shost->shost_classdev.kobj, &sysfs_ctlreg_attr);
}


/*
 * Dynamic FC Host Attributes Support
 */

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;
}

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);
}

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);
}

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;
            }
      }

      spin_unlock_irq(shost->host_lock);
}

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 = wwn_to_u64(vport->fc_nodename.u.wwn);

      spin_unlock_irq(shost->host_lock);

      fc_host_fabric_name(shost) = node_name;
}

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;
}

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.
 */

static struct lpfc_nodelist *
lpfc_get_node_by_target(struct scsi_target *starget)
{
      struct Scsi_Host  *shost = dev_to_shost(starget->dev.parent);
      struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
      struct lpfc_nodelist *ndlp;

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

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;
}

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;
}

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;
}

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;
}


#define lpfc_rport_show_function(field, format_string, sz, cast)  \
static ssize_t                                              \
lpfc_show_rport_##field (struct class_device *cdev, char *buf)          \
{                                                     \
      struct fc_rport *rport = transport_class_to_rport(cdev);    \
      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,

      .vport_create = lpfc_vport_create,
      .vport_delete = lpfc_vport_delete,
      .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,
};

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);
      phba->cfg_poll = lpfc_poll;
      phba->cfg_soft_wwnn = 0L;
      phba->cfg_soft_wwpn = 0L;
      /*
       * The total number of segments is the configuration value plus 2
       * since the IOCB need a command and response bde.
       */
      phba->cfg_sg_seg_cnt = LPFC_SG_SEG_CNT + 2;
      /*
       * Since the sg_tablesize is module parameter, the sg_dma_buf_size
       * used to create the sg_dma_buf_pool must be dynamically calculated
       */
      phba->cfg_sg_dma_buf_size = sizeof(struct fcp_cmnd) +
                  sizeof(struct fcp_rsp) +
                  (phba->cfg_sg_seg_cnt * sizeof(struct ulp_bde64));
      lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth);
      return;
}

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_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);
      return;
}

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