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qla_os.c

/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2005 QLogic Corporation
 *
 * See LICENSE.qla2xxx for copyright and licensing details.
 */
#include "qla_def.h"

#include <linux/moduleparam.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/kthread.h>

#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>

/*
 * Driver version
 */
char qla2x00_version_str[40];

/*
 * SRB allocation cache
 */
static kmem_cache_t *srb_cachep;

/*
 * Ioctl related information.
 */
static int num_hosts;

int ql2xlogintimeout = 20;
module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xlogintimeout,
            "Login timeout value in seconds.");

int qlport_down_retry = 30;
module_param(qlport_down_retry, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(qlport_down_retry,
            "Maximum number of command retries to a port that returns "
            "a PORT-DOWN status.");

int ql2xplogiabsentdevice;
module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(ql2xplogiabsentdevice,
            "Option to enable PLOGI to devices that are not present after "
            "a Fabric scan.  This is needed for several broken switches. "
            "Default is 0 - no PLOGI. 1 - perfom PLOGI.");

int ql2xloginretrycount = 0;
module_param(ql2xloginretrycount, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xloginretrycount,
            "Specify an alternate value for the NVRAM login retry count.");

int ql2xallocfwdump = 1;
module_param(ql2xallocfwdump, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xallocfwdump,
            "Option to enable allocation of memory for a firmware dump "
            "during HBA initialization.  Memory allocation requirements "
            "vary by ISP type.  Default is 1 - allocate memory.");

int extended_error_logging;
module_param(extended_error_logging, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(extended_error_logging,
            "Option to enable extended error logging, "
            "Default is 0 - no logging. 1 - log errors.");

static void qla2x00_free_device(scsi_qla_host_t *);

static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);

int ql2xfdmienable;
module_param(ql2xfdmienable, int, S_IRUGO|S_IRUSR);
MODULE_PARM_DESC(ql2xfdmienable,
            "Enables FDMI registratons "
            "Default is 0 - no FDMI. 1 - perfom FDMI.");

/*
 * SCSI host template entry points
 */
static int qla2xxx_slave_configure(struct scsi_device * device);
static int qla2xxx_slave_alloc(struct scsi_device *);
static void qla2xxx_slave_destroy(struct scsi_device *);
static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
            void (*fn)(struct scsi_cmnd *));
static int qla24xx_queuecommand(struct scsi_cmnd *cmd,
            void (*fn)(struct scsi_cmnd *));
static int qla2xxx_eh_abort(struct scsi_cmnd *);
static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
static int qla2x00_loop_reset(scsi_qla_host_t *ha);
static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);

static int qla2x00_change_queue_depth(struct scsi_device *, int);
static int qla2x00_change_queue_type(struct scsi_device *, int);

static struct scsi_host_template qla2x00_driver_template = {
      .module                 = THIS_MODULE,
      .name             = QLA2XXX_DRIVER_NAME,
      .queuecommand           = qla2x00_queuecommand,

      .eh_abort_handler = qla2xxx_eh_abort,
      .eh_device_reset_handler = qla2xxx_eh_device_reset,
      .eh_bus_reset_handler   = qla2xxx_eh_bus_reset,
      .eh_host_reset_handler  = qla2xxx_eh_host_reset,

      .slave_configure  = qla2xxx_slave_configure,

      .slave_alloc            = qla2xxx_slave_alloc,
      .slave_destroy          = qla2xxx_slave_destroy,
      .change_queue_depth     = qla2x00_change_queue_depth,
      .change_queue_type      = qla2x00_change_queue_type,
      .this_id          = -1,
      .cmd_per_lun            = 3,
      .use_clustering         = ENABLE_CLUSTERING,
      .sg_tablesize           = SG_ALL,

      /*
       * The RISC allows for each command to transfer (2^32-1) bytes of data,
       * which equates to 0x800000 sectors.
       */
      .max_sectors            = 0xFFFF,
      .shost_attrs            = qla2x00_host_attrs,
};

static struct scsi_host_template qla24xx_driver_template = {
      .module                 = THIS_MODULE,
      .name             = QLA2XXX_DRIVER_NAME,
      .queuecommand           = qla24xx_queuecommand,

      .eh_abort_handler = qla2xxx_eh_abort,
      .eh_device_reset_handler = qla2xxx_eh_device_reset,
      .eh_bus_reset_handler   = qla2xxx_eh_bus_reset,
      .eh_host_reset_handler  = qla2xxx_eh_host_reset,

      .slave_configure  = qla2xxx_slave_configure,

      .slave_alloc            = qla2xxx_slave_alloc,
      .slave_destroy          = qla2xxx_slave_destroy,
      .change_queue_depth     = qla2x00_change_queue_depth,
      .change_queue_type      = qla2x00_change_queue_type,
      .this_id          = -1,
      .cmd_per_lun            = 3,
      .use_clustering         = ENABLE_CLUSTERING,
      .sg_tablesize           = SG_ALL,

      .max_sectors            = 0xFFFF,
      .shost_attrs            = qla2x00_host_attrs,
};

static struct scsi_transport_template *qla2xxx_transport_template = NULL;

/* TODO Convert to inlines
 *
 * Timer routines
 */
#define     WATCH_INTERVAL          1       /* number of seconds */

static void qla2x00_timer(scsi_qla_host_t *);

static __inline__ void qla2x00_start_timer(scsi_qla_host_t *,
    void *, unsigned long);
static __inline__ void qla2x00_restart_timer(scsi_qla_host_t *, unsigned long);
static __inline__ void qla2x00_stop_timer(scsi_qla_host_t *);

static inline void
qla2x00_start_timer(scsi_qla_host_t *ha, void *func, unsigned long interval)
{
      init_timer(&ha->timer);
      ha->timer.expires = jiffies + interval * HZ;
      ha->timer.data = (unsigned long)ha;
      ha->timer.function = (void (*)(unsigned long))func;
      add_timer(&ha->timer);
      ha->timer_active = 1;
}

static inline void
qla2x00_restart_timer(scsi_qla_host_t *ha, unsigned long interval)
{
      mod_timer(&ha->timer, jiffies + interval * HZ);
}

static __inline__ void
qla2x00_stop_timer(scsi_qla_host_t *ha)
{
      del_timer_sync(&ha->timer);
      ha->timer_active = 0;
}

static int qla2x00_do_dpc(void *data);

static void qla2x00_rst_aen(scsi_qla_host_t *);

static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
static void qla2x00_mem_free(scsi_qla_host_t *ha);
static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
static void qla2x00_sp_free_dma(scsi_qla_host_t *, srb_t *);
void qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *);

/* -------------------------------------------------------------------------- */

static char *
qla2x00_pci_info_str(struct scsi_qla_host *ha, char *str)
{
      static char *pci_bus_modes[] = {
            "33", "66", "100", "133",
      };
      uint16_t pci_bus;

      strcpy(str, "PCI");
      pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
      if (pci_bus) {
            strcat(str, "-X (");
            strcat(str, pci_bus_modes[pci_bus]);
      } else {
            pci_bus = (ha->pci_attr & BIT_8) >> 8;
            strcat(str, " (");
            strcat(str, pci_bus_modes[pci_bus]);
      }
      strcat(str, " MHz)");

      return (str);
}

static char *
qla24xx_pci_info_str(struct scsi_qla_host *ha, char *str)
{
      static char *pci_bus_modes[] = { "33", "66", "100", "133", };
      uint32_t pci_bus;
      int pcie_reg;

      pcie_reg = pci_find_capability(ha->pdev, PCI_CAP_ID_EXP);
      if (pcie_reg) {
            char lwstr[6];
            uint16_t pcie_lstat, lspeed, lwidth;

            pcie_reg += 0x12;
            pci_read_config_word(ha->pdev, pcie_reg, &pcie_lstat);
            lspeed = pcie_lstat & (BIT_0 | BIT_1 | BIT_2 | BIT_3);
            lwidth = (pcie_lstat &
                (BIT_4 | BIT_5 | BIT_6 | BIT_7 | BIT_8 | BIT_9)) >> 4;

            strcpy(str, "PCIe (");
            if (lspeed == 1)
                  strcat(str, "2.5Gb/s ");
            else
                  strcat(str, "<unknown> ");
            snprintf(lwstr, sizeof(lwstr), "x%d)", lwidth);
            strcat(str, lwstr);

            return str;
      }

      strcpy(str, "PCI");
      pci_bus = (ha->pci_attr & CSRX_PCIX_BUS_MODE_MASK) >> 8;
      if (pci_bus == 0 || pci_bus == 8) {
            strcat(str, " (");
            strcat(str, pci_bus_modes[pci_bus >> 3]);
      } else {
            strcat(str, "-X ");
            if (pci_bus & BIT_2)
                  strcat(str, "Mode 2");
            else
                  strcat(str, "Mode 1");
            strcat(str, " (");
            strcat(str, pci_bus_modes[pci_bus & ~BIT_2]);
      }
      strcat(str, " MHz)");

      return str;
}

char *
qla2x00_fw_version_str(struct scsi_qla_host *ha, char *str)
{
      char un_str[10];

      sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
          ha->fw_minor_version,
          ha->fw_subminor_version);

      if (ha->fw_attributes & BIT_9) {
            strcat(str, "FLX");
            return (str);
      }

      switch (ha->fw_attributes & 0xFF) {
      case 0x7:
            strcat(str, "EF");
            break;
      case 0x17:
            strcat(str, "TP");
            break;
      case 0x37:
            strcat(str, "IP");
            break;
      case 0x77:
            strcat(str, "VI");
            break;
      default:
            sprintf(un_str, "(%x)", ha->fw_attributes);
            strcat(str, un_str);
            break;
      }
      if (ha->fw_attributes & 0x100)
            strcat(str, "X");

      return (str);
}

char *
qla24xx_fw_version_str(struct scsi_qla_host *ha, char *str)
{
      sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
          ha->fw_minor_version,
          ha->fw_subminor_version);

      if (ha->fw_attributes & BIT_0)
            strcat(str, "[Class 2] ");
      if (ha->fw_attributes & BIT_1)
            strcat(str, "[IP] ");
      if (ha->fw_attributes & BIT_2)
            strcat(str, "[Multi-ID] ");
      if (ha->fw_attributes & BIT_13)
            strcat(str, "[Experimental]");
      return str;
}

static inline srb_t *
qla2x00_get_new_sp(scsi_qla_host_t *ha, fc_port_t *fcport,
    struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
      srb_t *sp;

      sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
      if (!sp)
            return sp;

      sp->ha = ha;
      sp->fcport = fcport;
      sp->cmd = cmd;
      sp->flags = 0;
      CMD_SP(cmd) = (void *)sp;
      cmd->scsi_done = done;

      return sp;
}

static int
qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
      scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
      fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
      struct fc_rport *rport = starget_to_rport(scsi_target(cmd->device));
      srb_t *sp;
      int rval;

      rval = fc_remote_port_chkready(rport);
      if (rval) {
            cmd->result = rval;
            goto qc_fail_command;
      }

      /* Close window on fcport/rport state-transitioning. */
      if (!*(fc_port_t **)rport->dd_data) {
            cmd->result = DID_IMM_RETRY << 16;
            goto qc_fail_command;
      }

      if (atomic_read(&fcport->state) != FCS_ONLINE) {
            if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
                atomic_read(&ha->loop_state) == LOOP_DEAD) {
                  cmd->result = DID_NO_CONNECT << 16;
                  goto qc_fail_command;
            }
            goto qc_host_busy;
      }

      spin_unlock_irq(ha->host->host_lock);

      sp = qla2x00_get_new_sp(ha, fcport, cmd, done);
      if (!sp)
            goto qc_host_busy_lock;

      rval = qla2x00_start_scsi(sp);
      if (rval != QLA_SUCCESS)
            goto qc_host_busy_free_sp;

      spin_lock_irq(ha->host->host_lock);

      return 0;

qc_host_busy_free_sp:
      qla2x00_sp_free_dma(ha, sp);
      mempool_free(sp, ha->srb_mempool);

qc_host_busy_lock:
      spin_lock_irq(ha->host->host_lock);

qc_host_busy:
      return SCSI_MLQUEUE_HOST_BUSY;

qc_fail_command:
      done(cmd);

      return 0;
}


static int
qla24xx_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
      scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
      fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
      struct fc_rport *rport = starget_to_rport(scsi_target(cmd->device));
      srb_t *sp;
      int rval;

      rval = fc_remote_port_chkready(rport);
      if (rval) {
            cmd->result = rval;
            goto qc24_fail_command;
      }

      /* Close window on fcport/rport state-transitioning. */
      if (!*(fc_port_t **)rport->dd_data) {
            cmd->result = DID_IMM_RETRY << 16;
            goto qc24_fail_command;
      }

      if (atomic_read(&fcport->state) != FCS_ONLINE) {
            if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
                atomic_read(&ha->loop_state) == LOOP_DEAD) {
                  cmd->result = DID_NO_CONNECT << 16;
                  goto qc24_fail_command;
            }
            goto qc24_host_busy;
      }

      spin_unlock_irq(ha->host->host_lock);

      sp = qla2x00_get_new_sp(ha, fcport, cmd, done);
      if (!sp)
            goto qc24_host_busy_lock;

      rval = qla24xx_start_scsi(sp);
      if (rval != QLA_SUCCESS)
            goto qc24_host_busy_free_sp;

      spin_lock_irq(ha->host->host_lock);

      return 0;

qc24_host_busy_free_sp:
      qla2x00_sp_free_dma(ha, sp);
      mempool_free(sp, ha->srb_mempool);

qc24_host_busy_lock:
      spin_lock_irq(ha->host->host_lock);

qc24_host_busy:
      return SCSI_MLQUEUE_HOST_BUSY;

qc24_fail_command:
      done(cmd);

      return 0;
}


/*
 * qla2x00_eh_wait_on_command
 *    Waits for the command to be returned by the Firmware for some
 *    max time.
 *
 * Input:
 *    ha = actual ha whose done queue will contain the command
 *          returned by firmware.
 *    cmd = Scsi Command to wait on.
 *    flag = Abort/Reset(Bus or Device Reset)
 *
 * Return:
 *    Not Found : 0
 *    Found : 1
 */
static int
qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
{
#define ABORT_POLLING_PERIOD  1000
#define ABORT_WAIT_ITER       ((10 * 1000) / (ABORT_POLLING_PERIOD))
      unsigned long wait_iter = ABORT_WAIT_ITER;
      int ret = QLA_SUCCESS;

      while (CMD_SP(cmd)) {
            msleep(ABORT_POLLING_PERIOD);

            if (--wait_iter)
                  break;
      }
      if (CMD_SP(cmd))
            ret = QLA_FUNCTION_FAILED;

      return ret;
}

/*
 * qla2x00_wait_for_hba_online
 *    Wait till the HBA is online after going through
 *    <= MAX_RETRIES_OF_ISP_ABORT  or
 *    finally HBA is disabled ie marked offline
 *
 * Input:
 *     ha - pointer to host adapter structure
 *
 * Note:
 *    Does context switching-Release SPIN_LOCK
 *    (if any) before calling this routine.
 *
 * Return:
 *    Success (Adapter is online) : 0
 *    Failed  (Adapter is offline/disabled) : 1
 */
int
qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
{
      int         return_status;
      unsigned long     wait_online;

      wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
      while (((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) ||
          test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
          test_bit(ISP_ABORT_RETRY, &ha->dpc_flags) ||
          ha->dpc_active) && time_before(jiffies, wait_online)) {

            msleep(1000);
      }
      if (ha->flags.online)
            return_status = QLA_SUCCESS;
      else
            return_status = QLA_FUNCTION_FAILED;

      DEBUG2(printk("%s return_status=%d\n",__func__,return_status));

      return (return_status);
}

/*
 * qla2x00_wait_for_loop_ready
 *    Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
 *    to be in LOOP_READY state.
 * Input:
 *     ha - pointer to host adapter structure
 *
 * Note:
 *    Does context switching-Release SPIN_LOCK
 *    (if any) before calling this routine.
 *
 *
 * Return:
 *    Success (LOOP_READY) : 0
 *    Failed  (LOOP_NOT_READY) : 1
 */
static inline int
qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
{
      int    return_status = QLA_SUCCESS;
      unsigned long loop_timeout ;

      /* wait for 5 min at the max for loop to be ready */
      loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ);

      while ((!atomic_read(&ha->loop_down_timer) &&
          atomic_read(&ha->loop_state) == LOOP_DOWN) ||
          atomic_read(&ha->loop_state) != LOOP_READY) {
            if (atomic_read(&ha->loop_state) == LOOP_DEAD) {
                  return_status = QLA_FUNCTION_FAILED;
                  break;
            }
            msleep(1000);
            if (time_after_eq(jiffies, loop_timeout)) {
                  return_status = QLA_FUNCTION_FAILED;
                  break;
            }
      }
      return (return_status);
}

/**************************************************************************
* qla2xxx_eh_abort
*
* Description:
*    The abort function will abort the specified command.
*
* Input:
*    cmd = Linux SCSI command packet to be aborted.
*
* Returns:
*    Either SUCCESS or FAILED.
*
* Note:
*    Only return FAILED if command not returned by firmware.
**************************************************************************/
int
qla2xxx_eh_abort(struct scsi_cmnd *cmd)
{
      scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
      srb_t *sp;
      int ret, i;
      unsigned int id, lun;
      unsigned long serial;
      unsigned long flags;
      int wait = 0;

      if (!CMD_SP(cmd))
            return SUCCESS;

      ret = SUCCESS;

      id = cmd->device->id;
      lun = cmd->device->lun;
      serial = cmd->serial_number;

      /* Check active list for command command. */
      spin_lock_irqsave(&ha->hardware_lock, flags);
      for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
            sp = ha->outstanding_cmds[i];

            if (sp == NULL)
                  continue;

            if (sp->cmd != cmd)
                  continue;

            DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld.\n",
                __func__, ha->host_no, sp, serial));
            DEBUG3(qla2x00_print_scsi_cmd(cmd));

            spin_unlock_irqrestore(&ha->hardware_lock, flags);
            if (ha->isp_ops.abort_command(ha, sp)) {
                  DEBUG2(printk("%s(%ld): abort_command "
                      "mbx failed.\n", __func__, ha->host_no));
            } else {
                  DEBUG3(printk("%s(%ld): abort_command "
                      "mbx success.\n", __func__, ha->host_no));
                  wait = 1;
            }
            spin_lock_irqsave(&ha->hardware_lock, flags);

            break;
      }
      spin_unlock_irqrestore(&ha->hardware_lock, flags);

      /* Wait for the command to be returned. */
      if (wait) {
            if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
                  qla_printk(KERN_ERR, ha,
                      "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
                      "%x.\n", ha->host_no, id, lun, serial, ret);
                  ret = FAILED;
            }
      }

      qla_printk(KERN_INFO, ha,
          "scsi(%ld:%d:%d): Abort command issued -- %d %lx %x.\n",
          ha->host_no, id, lun, wait, serial, ret);

      return ret;
}

/**************************************************************************
* qla2x00_eh_wait_for_pending_target_commands
*
* Description:
*    Waits for all the commands to come back from the specified target.
*
* Input:
*    ha - pointer to scsi_qla_host structure.
*    t  - target
* Returns:
*    Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
{
      int   cnt;
      int   status;
      srb_t       *sp;
      struct scsi_cmnd *cmd;
      unsigned long flags;

      status = 0;

      /*
       * Waiting for all commands for the designated target in the active
       * array
       */
      for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
            spin_lock_irqsave(&ha->hardware_lock, flags);
            sp = ha->outstanding_cmds[cnt];
            if (sp) {
                  cmd = sp->cmd;
                  spin_unlock_irqrestore(&ha->hardware_lock, flags);
                  if (cmd->device->id == t) {
                        if (!qla2x00_eh_wait_on_command(ha, cmd)) {
                              status = 1;
                              break;
                        }
                  }
            } else {
                  spin_unlock_irqrestore(&ha->hardware_lock, flags);
            }
      }
      return (status);
}


/**************************************************************************
* qla2xxx_eh_device_reset
*
* Description:
*    The device reset function will reset the target and abort any
*    executing commands.
*
*    NOTE: The use of SP is undefined within this context.  Do *NOT*
*          attempt to use this value, even if you determine it is
*          non-null.
*
* Input:
*    cmd = Linux SCSI command packet of the command that cause the
*          bus device reset.
*
* Returns:
*    SUCCESS/FAILURE (defined as macro in scsi.h).
*
**************************************************************************/
int
qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
{
      scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
      fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
      int ret;
      unsigned int id, lun;
      unsigned long serial;

      ret = FAILED;

      id = cmd->device->id;
      lun = cmd->device->lun;
      serial = cmd->serial_number;

      if (!fcport)
            return ret;

      qla_printk(KERN_INFO, ha,
          "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);

      if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
            goto eh_dev_reset_done;

      if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
            if (qla2x00_device_reset(ha, fcport) == 0)
                  ret = SUCCESS;

#if defined(LOGOUT_AFTER_DEVICE_RESET)
            if (ret == SUCCESS) {
                  if (fcport->flags & FC_FABRIC_DEVICE) {
                        ha->isp_ops.fabric_logout(ha, fcport->loop_id);
                        qla2x00_mark_device_lost(ha, fcport, 0, 0);
                  }
            }
#endif
      } else {
            DEBUG2(printk(KERN_INFO
                "%s failed: loop not ready\n",__func__));
      }

      if (ret == FAILED) {
            DEBUG3(printk("%s(%ld): device reset failed\n",
                __func__, ha->host_no));
            qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
                __func__);

            goto eh_dev_reset_done;
      }

      /* Flush outstanding commands. */
      if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
            ret = FAILED;
      if (ret == FAILED) {
            DEBUG3(printk("%s(%ld): failed while waiting for commands\n",
                __func__, ha->host_no));
            qla_printk(KERN_INFO, ha,
                "%s: failed while waiting for commands\n", __func__);
      } else
            qla_printk(KERN_INFO, ha,
                "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no,
                id, lun);
 eh_dev_reset_done:
      return ret;
}

/**************************************************************************
* qla2x00_eh_wait_for_pending_commands
*
* Description:
*    Waits for all the commands to come back from the specified host.
*
* Input:
*    ha - pointer to scsi_qla_host structure.
*
* Returns:
*    1 : SUCCESS
*    0 : FAILED
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
{
      int   cnt;
      int   status;
      srb_t       *sp;
      struct scsi_cmnd *cmd;
      unsigned long flags;

      status = 1;

      /*
       * Waiting for all commands for the designated target in the active
       * array
       */
      for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
            spin_lock_irqsave(&ha->hardware_lock, flags);
            sp = ha->outstanding_cmds[cnt];
            if (sp) {
                  cmd = sp->cmd;
                  spin_unlock_irqrestore(&ha->hardware_lock, flags);
                  status = qla2x00_eh_wait_on_command(ha, cmd);
                  if (status == 0)
                        break;
            }
            else {
                  spin_unlock_irqrestore(&ha->hardware_lock, flags);
            }
      }
      return (status);
}


/**************************************************************************
* qla2xxx_eh_bus_reset
*
* Description:
*    The bus reset function will reset the bus and abort any executing
*    commands.
*
* Input:
*    cmd = Linux SCSI command packet of the command that cause the
*          bus reset.
*
* Returns:
*    SUCCESS/FAILURE (defined as macro in scsi.h).
*
**************************************************************************/
int
qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
{
      scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
      fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
      int ret;
      unsigned int id, lun;
      unsigned long serial;

      ret = FAILED;

      id = cmd->device->id;
      lun = cmd->device->lun;
      serial = cmd->serial_number;

      if (!fcport)
            return ret;

      qla_printk(KERN_INFO, ha,
          "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);

      if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
            DEBUG2(printk("%s failed:board disabled\n",__func__));
            goto eh_bus_reset_done;
      }

      if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
            if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
                  ret = SUCCESS;
      }
      if (ret == FAILED)
            goto eh_bus_reset_done;

      /* Flush outstanding commands. */
      if (!qla2x00_eh_wait_for_pending_commands(ha))
            ret = FAILED;

eh_bus_reset_done:
      qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
          (ret == FAILED) ? "failed" : "succeded");

      return ret;
}

/**************************************************************************
* qla2xxx_eh_host_reset
*
* Description:
*    The reset function will reset the Adapter.
*
* Input:
*      cmd = Linux SCSI command packet of the command that cause the
*            adapter reset.
*
* Returns:
*      Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
int
qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
{
      scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
      fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
      int ret;
      unsigned int id, lun;
      unsigned long serial;

      ret = FAILED;

      id = cmd->device->id;
      lun = cmd->device->lun;
      serial = cmd->serial_number;

      if (!fcport)
            return ret;

      qla_printk(KERN_INFO, ha,
          "scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);

      if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
            goto eh_host_reset_lock;

      /*
       * Fixme-may be dpc thread is active and processing
       * loop_resync,so wait a while for it to
       * be completed and then issue big hammer.Otherwise
       * it may cause I/O failure as big hammer marks the
       * devices as lost kicking of the port_down_timer
       * while dpc is stuck for the mailbox to complete.
       */
      qla2x00_wait_for_loop_ready(ha);
      set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
      if (qla2x00_abort_isp(ha)) {
            clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
            /* failed. schedule dpc to try */
            set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);

            if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
                  goto eh_host_reset_lock;
      }
      clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);

      /* Waiting for our command in done_queue to be returned to OS.*/
      if (qla2x00_eh_wait_for_pending_commands(ha))
            ret = SUCCESS;

eh_host_reset_lock:
      qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
          (ret == FAILED) ? "failed" : "succeded");

      return ret;
}

/*
* qla2x00_loop_reset
*      Issue loop reset.
*
* Input:
*      ha = adapter block pointer.
*
* Returns:
*      0 = success
*/
static int
qla2x00_loop_reset(scsi_qla_host_t *ha)
{
      int status = QLA_SUCCESS;
      struct fc_port *fcport;

      if (ha->flags.enable_lip_reset) {
            status = qla2x00_lip_reset(ha);
      }

      if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
            list_for_each_entry(fcport, &ha->fcports, list) {
                  if (fcport->port_type != FCT_TARGET)
                        continue;

                  status = qla2x00_device_reset(ha, fcport);
                  if (status != QLA_SUCCESS)
                        break;
            }
      }

      if (status == QLA_SUCCESS &&
            ((!ha->flags.enable_target_reset &&
              !ha->flags.enable_lip_reset) ||
            ha->flags.enable_lip_full_login)) {

            status = qla2x00_full_login_lip(ha);
      }

      /* Issue marker command only when we are going to start the I/O */
      ha->marker_needed = 1;

      if (status) {
            /* Empty */
            DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
                        __func__,
                        ha->host_no));
      } else {
            /* Empty */
            DEBUG3(printk("%s(%ld): exiting normally.\n",
                        __func__,
                        ha->host_no));
      }

      return(status);
}

/*
 * qla2x00_device_reset
 *    Issue bus device reset message to the target.
 *
 * Input:
 *    ha = adapter block pointer.
 *    t = SCSI ID.
 *    TARGET_QUEUE_LOCK must be released.
 *    ADAPTER_STATE_LOCK must be released.
 *
 * Context:
 *    Kernel context.
 */
static int
qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
{
      /* Abort Target command will clear Reservation */
      return ha->isp_ops.abort_target(reset_fcport);
}

static int
qla2xxx_slave_alloc(struct scsi_device *sdev)
{
      struct fc_rport *rport = starget_to_rport(scsi_target(sdev));

      if (!rport || fc_remote_port_chkready(rport))
            return -ENXIO;

      sdev->hostdata = *(fc_port_t **)rport->dd_data;

      return 0;
}

static int
qla2xxx_slave_configure(struct scsi_device *sdev)
{
      scsi_qla_host_t *ha = to_qla_host(sdev->host);
      struct fc_rport *rport = starget_to_rport(sdev->sdev_target);

      if (sdev->tagged_supported)
            scsi_activate_tcq(sdev, 32);
      else
            scsi_deactivate_tcq(sdev, 32);

      rport->dev_loss_tmo = ha->port_down_retry_count + 5;

      return 0;
}

static void
qla2xxx_slave_destroy(struct scsi_device *sdev)
{
      sdev->hostdata = NULL;
}

static int
qla2x00_change_queue_depth(struct scsi_device *sdev, int qdepth)
{
      scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
      return sdev->queue_depth;
}

static int
qla2x00_change_queue_type(struct scsi_device *sdev, int tag_type)
{
      if (sdev->tagged_supported) {
            scsi_set_tag_type(sdev, tag_type);
            if (tag_type)
                  scsi_activate_tcq(sdev, sdev->queue_depth);
            else
                  scsi_deactivate_tcq(sdev, sdev->queue_depth);
      } else
            tag_type = 0;

      return tag_type;
}

/**
 * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
 * @ha: HA context
 *
 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
 * supported addressing method.
 */
static void
qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
{
      /* Assume a 32bit DMA mask. */
      ha->flags.enable_64bit_addressing = 0;

      if (!dma_set_mask(&ha->pdev->dev, DMA_64BIT_MASK)) {
            /* Any upper-dword bits set? */
            if (MSD(dma_get_required_mask(&ha->pdev->dev)) &&
                !pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
                  /* Ok, a 64bit DMA mask is applicable. */
                  ha->flags.enable_64bit_addressing = 1;
                  ha->isp_ops.calc_req_entries = qla2x00_calc_iocbs_64;
                  ha->isp_ops.build_iocbs = qla2x00_build_scsi_iocbs_64;
                  return;
            }
      }

      dma_set_mask(&ha->pdev->dev, DMA_32BIT_MASK);
      pci_set_consistent_dma_mask(ha->pdev, DMA_32BIT_MASK);
}

static inline void
qla2x00_set_isp_flags(scsi_qla_host_t *ha)
{
      ha->device_type = DT_EXTENDED_IDS;
      switch (ha->pdev->device) {
      case PCI_DEVICE_ID_QLOGIC_ISP2100:
            ha->device_type |= DT_ISP2100;
            ha->device_type &= ~DT_EXTENDED_IDS;
            ha->fw_srisc_address = RISC_START_ADDRESS_2100;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP2200:
            ha->device_type |= DT_ISP2200;
            ha->device_type &= ~DT_EXTENDED_IDS;
            ha->fw_srisc_address = RISC_START_ADDRESS_2100;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP2300:
            ha->device_type |= DT_ISP2300;
            ha->device_type |= DT_ZIO_SUPPORTED;
            ha->fw_srisc_address = RISC_START_ADDRESS_2300;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP2312:
            ha->device_type |= DT_ISP2312;
            ha->device_type |= DT_ZIO_SUPPORTED;
            ha->fw_srisc_address = RISC_START_ADDRESS_2300;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP2322:
            ha->device_type |= DT_ISP2322;
            ha->device_type |= DT_ZIO_SUPPORTED;
            if (ha->pdev->subsystem_vendor == 0x1028 &&
                ha->pdev->subsystem_device == 0x0170)
                  ha->device_type |= DT_OEM_001;
            ha->fw_srisc_address = RISC_START_ADDRESS_2300;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP6312:
            ha->device_type |= DT_ISP6312;
            ha->fw_srisc_address = RISC_START_ADDRESS_2300;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP6322:
            ha->device_type |= DT_ISP6322;
            ha->fw_srisc_address = RISC_START_ADDRESS_2300;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP2422:
            ha->device_type |= DT_ISP2422;
            ha->device_type |= DT_ZIO_SUPPORTED;
            ha->fw_srisc_address = RISC_START_ADDRESS_2400;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP2432:
            ha->device_type |= DT_ISP2432;
            ha->device_type |= DT_ZIO_SUPPORTED;
            ha->fw_srisc_address = RISC_START_ADDRESS_2400;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP5422:
            ha->device_type |= DT_ISP5422;
            ha->fw_srisc_address = RISC_START_ADDRESS_2400;
            break;
      case PCI_DEVICE_ID_QLOGIC_ISP5432:
            ha->device_type |= DT_ISP5432;
            ha->fw_srisc_address = RISC_START_ADDRESS_2400;
            break;
      }
}

static int
qla2x00_iospace_config(scsi_qla_host_t *ha)
{
      unsigned long     pio, pio_len, pio_flags;
      unsigned long     mmio, mmio_len, mmio_flags;

      /* We only need PIO for Flash operations on ISP2312 v2 chips. */
      pio = pci_resource_start(ha->pdev, 0);
      pio_len = pci_resource_len(ha->pdev, 0);
      pio_flags = pci_resource_flags(ha->pdev, 0);
      if (pio_flags & IORESOURCE_IO) {
            if (pio_len < MIN_IOBASE_LEN) {
                  qla_printk(KERN_WARNING, ha,
                      "Invalid PCI I/O region size (%s)...\n",
                        pci_name(ha->pdev));
                  pio = 0;
            }
      } else {
            qla_printk(KERN_WARNING, ha,
                "region #0 not a PIO resource (%s)...\n",
                pci_name(ha->pdev));
            pio = 0;
      }

      /* Use MMIO operations for all accesses. */
      mmio = pci_resource_start(ha->pdev, 1);
      mmio_len = pci_resource_len(ha->pdev, 1);
      mmio_flags = pci_resource_flags(ha->pdev, 1);

      if (!(mmio_flags & IORESOURCE_MEM)) {
            qla_printk(KERN_ERR, ha,
                "region #0 not an MMIO resource (%s), aborting\n",
                pci_name(ha->pdev));
            goto iospace_error_exit;
      }
      if (mmio_len < MIN_IOBASE_LEN) {
            qla_printk(KERN_ERR, ha,
                "Invalid PCI mem region size (%s), aborting\n",
                  pci_name(ha->pdev));
            goto iospace_error_exit;
      }

      if (pci_request_regions(ha->pdev, QLA2XXX_DRIVER_NAME)) {
            qla_printk(KERN_WARNING, ha,
                "Failed to reserve PIO/MMIO regions (%s)\n",
                pci_name(ha->pdev));

            goto iospace_error_exit;
      }

      ha->pio_address = pio;
      ha->pio_length = pio_len;
      ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
      if (!ha->iobase) {
            qla_printk(KERN_ERR, ha,
                "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));

            goto iospace_error_exit;
      }

      return (0);

iospace_error_exit:
      return (-ENOMEM);
}

static void
qla2x00_enable_intrs(scsi_qla_host_t *ha)
{
      unsigned long flags = 0;
      struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

      spin_lock_irqsave(&ha->hardware_lock, flags);
      ha->interrupts_on = 1;
      /* enable risc and host interrupts */
      WRT_REG_WORD(&reg->ictrl, ICR_EN_INT | ICR_EN_RISC);
      RD_REG_WORD(&reg->ictrl);
      spin_unlock_irqrestore(&ha->hardware_lock, flags);

}

static void
qla2x00_disable_intrs(scsi_qla_host_t *ha)
{
      unsigned long flags = 0;
      struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

      spin_lock_irqsave(&ha->hardware_lock, flags);
      ha->interrupts_on = 0;
      /* disable risc and host interrupts */
      WRT_REG_WORD(&reg->ictrl, 0);
      RD_REG_WORD(&reg->ictrl);
      spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static void
qla24xx_enable_intrs(scsi_qla_host_t *ha)
{
      unsigned long flags = 0;
      struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

      spin_lock_irqsave(&ha->hardware_lock, flags);
      ha->interrupts_on = 1;
      WRT_REG_DWORD(&reg->ictrl, ICRX_EN_RISC_INT);
      RD_REG_DWORD(&reg->ictrl);
      spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

static void
qla24xx_disable_intrs(scsi_qla_host_t *ha)
{
      unsigned long flags = 0;
      struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

      spin_lock_irqsave(&ha->hardware_lock, flags);
      ha->interrupts_on = 0;
      WRT_REG_DWORD(&reg->ictrl, 0);
      RD_REG_DWORD(&reg->ictrl);
      spin_unlock_irqrestore(&ha->hardware_lock, flags);
}

/*
 * PCI driver interface
 */
static int __devinit
qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
      int   ret = -ENODEV;
      device_reg_t __iomem *reg;
      struct Scsi_Host *host;
      scsi_qla_host_t *ha;
      unsigned long     flags = 0;
      unsigned long     wait_switch = 0;
      char pci_info[20];
      char fw_str[30];
      fc_port_t *fcport;
      struct scsi_host_template *sht;

      if (pci_enable_device(pdev))
            goto probe_out;

      sht = &qla2x00_driver_template;
      if (pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2422 ||
          pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2432)
            sht = &qla24xx_driver_template;
      host = scsi_host_alloc(sht, sizeof(scsi_qla_host_t));
      if (host == NULL) {
            printk(KERN_WARNING
                "qla2xxx: Couldn't allocate host from scsi layer!\n");
            goto probe_disable_device;
      }

      /* Clear our data area */
      ha = (scsi_qla_host_t *)host->hostdata;
      memset(ha, 0, sizeof(scsi_qla_host_t));

      ha->pdev = pdev;
      ha->host = host;
      ha->host_no = host->host_no;
      sprintf(ha->host_str, "%s_%ld", QLA2XXX_DRIVER_NAME, ha->host_no);

      /* Set ISP-type information. */
      qla2x00_set_isp_flags(ha);

      /* Configure PCI I/O space */
      ret = qla2x00_iospace_config(ha);
      if (ret)
            goto probe_failed;

      qla_printk(KERN_INFO, ha,
          "Found an ISP%04X, irq %d, iobase 0x%p\n", pdev->device, pdev->irq,
          ha->iobase);

      spin_lock_init(&ha->hardware_lock);

      ha->prev_topology = 0;
      ha->init_cb_size = sizeof(init_cb_t);
      ha->mgmt_svr_loop_id = MANAGEMENT_SERVER;
      ha->link_data_rate = LDR_UNKNOWN;
      ha->optrom_size = OPTROM_SIZE_2300;

      /* Assign ISP specific operations. */
      ha->isp_ops.pci_config        = qla2100_pci_config;
      ha->isp_ops.reset_chip        = qla2x00_reset_chip;
      ha->isp_ops.chip_diag         = qla2x00_chip_diag;
      ha->isp_ops.config_rings      = qla2x00_config_rings;
      ha->isp_ops.reset_adapter     = qla2x00_reset_adapter;
      ha->isp_ops.nvram_config      = qla2x00_nvram_config;
      ha->isp_ops.update_fw_options = qla2x00_update_fw_options;
      ha->isp_ops.load_risc         = qla2x00_load_risc;
      ha->isp_ops.pci_info_str      = qla2x00_pci_info_str;
      ha->isp_ops.fw_version_str    = qla2x00_fw_version_str;
      ha->isp_ops.intr_handler      = qla2100_intr_handler;
      ha->isp_ops.enable_intrs      = qla2x00_enable_intrs;
      ha->isp_ops.disable_intrs     = qla2x00_disable_intrs;
      ha->isp_ops.abort_command     = qla2x00_abort_command;
      ha->isp_ops.abort_target      = qla2x00_abort_target;
      ha->isp_ops.fabric_login      = qla2x00_login_fabric;
      ha->isp_ops.fabric_logout     = qla2x00_fabric_logout;
      ha->isp_ops.calc_req_entries  = qla2x00_calc_iocbs_32;
      ha->isp_ops.build_iocbs       = qla2x00_build_scsi_iocbs_32;
      ha->isp_ops.prep_ms_iocb      = qla2x00_prep_ms_iocb;
      ha->isp_ops.prep_ms_fdmi_iocb = qla2x00_prep_ms_fdmi_iocb;
      ha->isp_ops.read_nvram        = qla2x00_read_nvram_data;
      ha->isp_ops.write_nvram       = qla2x00_write_nvram_data;
      ha->isp_ops.fw_dump           = qla2100_fw_dump;
      ha->isp_ops.read_optrom       = qla2x00_read_optrom_data;
      ha->isp_ops.write_optrom      = qla2x00_write_optrom_data;
      if (IS_QLA2100(ha)) {
            host->max_id = MAX_TARGETS_2100;
            ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
            ha->request_q_length = REQUEST_ENTRY_CNT_2100;
            ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
            ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
            host->sg_tablesize = 32;
            ha->gid_list_info_size = 4;
      } else if (IS_QLA2200(ha)) {
            host->max_id = MAX_TARGETS_2200;
            ha->mbx_count = MAILBOX_REGISTER_COUNT;
            ha->request_q_length = REQUEST_ENTRY_CNT_2200;
            ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
            ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
            ha->gid_list_info_size = 4;
      } else if (IS_QLA23XX(ha)) {
            host->max_id = MAX_TARGETS_2200;
            ha->mbx_count = MAILBOX_REGISTER_COUNT;
            ha->request_q_length = REQUEST_ENTRY_CNT_2200;
            ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
            ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
            ha->isp_ops.pci_config = qla2300_pci_config;
            ha->isp_ops.intr_handler = qla2300_intr_handler;
            ha->isp_ops.fw_dump = qla2300_fw_dump;
            ha->isp_ops.beacon_on = qla2x00_beacon_on;
            ha->isp_ops.beacon_off = qla2x00_beacon_off;
            ha->isp_ops.beacon_blink = qla2x00_beacon_blink;
            ha->gid_list_info_size = 6;
            if (IS_QLA2322(ha) || IS_QLA6322(ha))
                  ha->optrom_size = OPTROM_SIZE_2322;
      } else if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
            host->max_id = MAX_TARGETS_2200;
            ha->mbx_count = MAILBOX_REGISTER_COUNT;
            ha->request_q_length = REQUEST_ENTRY_CNT_24XX;
            ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
            ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
            ha->init_cb_size = sizeof(struct init_cb_24xx);
            ha->mgmt_svr_loop_id = 10;
            ha->isp_ops.pci_config = qla24xx_pci_config;
            ha->isp_ops.reset_chip = qla24xx_reset_chip;
            ha->isp_ops.chip_diag = qla24xx_chip_diag;
            ha->isp_ops.config_rings = qla24xx_config_rings;
            ha->isp_ops.reset_adapter = qla24xx_reset_adapter;
            ha->isp_ops.nvram_config = qla24xx_nvram_config;
            ha->isp_ops.update_fw_options = qla24xx_update_fw_options;
            ha->isp_ops.load_risc = qla24xx_load_risc;
            ha->isp_ops.pci_info_str = qla24xx_pci_info_str;
            ha->isp_ops.fw_version_str = qla24xx_fw_version_str;
            ha->isp_ops.intr_handler = qla24xx_intr_handler;
            ha->isp_ops.enable_intrs = qla24xx_enable_intrs;
            ha->isp_ops.disable_intrs = qla24xx_disable_intrs;
            ha->isp_ops.abort_command = qla24xx_abort_command;
            ha->isp_ops.abort_target = qla24xx_abort_target;
            ha->isp_ops.fabric_login = qla24xx_login_fabric;
            ha->isp_ops.fabric_logout = qla24xx_fabric_logout;
            ha->isp_ops.prep_ms_iocb = qla24xx_prep_ms_iocb;
            ha->isp_ops.prep_ms_fdmi_iocb = qla24xx_prep_ms_fdmi_iocb;
            ha->isp_ops.read_nvram = qla24xx_read_nvram_data;
            ha->isp_ops.write_nvram = qla24xx_write_nvram_data;
            ha->isp_ops.fw_dump = qla24xx_fw_dump;
            ha->isp_ops.read_optrom = qla24xx_read_optrom_data;
            ha->isp_ops.write_optrom = qla24xx_write_optrom_data;
            ha->isp_ops.beacon_on = qla24xx_beacon_on;
            ha->isp_ops.beacon_off = qla24xx_beacon_off;
            ha->isp_ops.beacon_blink = qla24xx_beacon_blink;
            ha->gid_list_info_size = 8;
            ha->optrom_size = OPTROM_SIZE_24XX;
      }
      host->can_queue = ha->request_q_length + 128;

      /* load the F/W, read paramaters, and init the H/W */
      ha->instance = num_hosts;

      init_MUTEX(&ha->mbx_cmd_sem);
      init_MUTEX_LOCKED(&ha->mbx_intr_sem);

      INIT_LIST_HEAD(&ha->list);
      INIT_LIST_HEAD(&ha->fcports);

      /*
       * These locks are used to prevent more than one CPU
       * from modifying the queue at the same time. The
       * higher level "host_lock" will reduce most
       * contention for these locks.
       */
      spin_lock_init(&ha->mbx_reg_lock);

      qla2x00_config_dma_addressing(ha);
      if (qla2x00_mem_alloc(ha)) {
            qla_printk(KERN_WARNING, ha,
                "[ERROR] Failed to allocate memory for adapter\n");

            ret = -ENOMEM;
            goto probe_failed;
      }

      if (qla2x00_initialize_adapter(ha) &&
          !(ha->device_flags & DFLG_NO_CABLE)) {

            qla_printk(KERN_WARNING, ha,
                "Failed to initialize adapter\n");

            DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
                "Adapter flags %x.\n",
                ha->host_no, ha->device_flags));

            ret = -ENODEV;
            goto probe_failed;
      }

      /*
       * Startup the kernel thread for this host adapter
       */
      ha->dpc_thread = kthread_create(qla2x00_do_dpc, ha,
                  "%s_dpc", ha->host_str);
      if (IS_ERR(ha->dpc_thread)) {
            qla_printk(KERN_WARNING, ha,
                "Unable to start DPC thread!\n");
            ret = PTR_ERR(ha->dpc_thread);
            goto probe_failed;
      }

      host->this_id = 255;
      host->cmd_per_lun = 3;
      host->unique_id = ha->instance;
      host->max_cmd_len = MAX_CMDSZ;
      host->max_channel = MAX_BUSES - 1;
      host->max_lun = MAX_LUNS;
      host->transportt = qla2xxx_transport_template;

      ret = request_irq(pdev->irq, ha->isp_ops.intr_handler,
          IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
      if (ret) {
            qla_printk(KERN_WARNING, ha,
                "Failed to reserve interrupt %d already in use.\n",
                pdev->irq);
            goto probe_failed;
      }
      host->irq = pdev->irq;

      /* Initialized the timer */
      qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);

      DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
          ha->host_no, ha));

      ha->isp_ops.disable_intrs(ha);

      spin_lock_irqsave(&ha->hardware_lock, flags);
      reg = ha->iobase;
      if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
            WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
            WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
      } else {
            WRT_REG_WORD(&reg->isp.semaphore, 0);
            WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
            WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);

            /* Enable proper parity */
            if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
                  if (IS_QLA2300(ha))
                        /* SRAM parity */
                        WRT_REG_WORD(&reg->isp.hccr,
                            (HCCR_ENABLE_PARITY + 0x1));
                  else
                        /* SRAM, Instruction RAM and GP RAM parity */
                        WRT_REG_WORD(&reg->isp.hccr,
                            (HCCR_ENABLE_PARITY + 0x7));
            }
      }
      spin_unlock_irqrestore(&ha->hardware_lock, flags);

      ha->isp_ops.enable_intrs(ha);

      /* v2.19.5b6 */
      /*
       * Wait around max loop_reset_delay secs for the devices to come
       * on-line. We don't want Linux scanning before we are ready.
       *
       */
      for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
          time_before(jiffies,wait_switch) &&
           !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
           && (ha->device_flags & SWITCH_FOUND) ;) {

            qla2x00_check_fabric_devices(ha);

            msleep(10);
      }

      pci_set_drvdata(pdev, ha);
      ha->flags.init_done = 1;
      num_hosts++;

      ret = scsi_add_host(host, &pdev->dev);
      if (ret)
            goto probe_failed;

      qla2x00_alloc_sysfs_attr(ha);

      qla2x00_init_host_attr(ha);

      qla_printk(KERN_INFO, ha, "\n"
          " QLogic Fibre Channel HBA Driver: %s\n"
          "  QLogic %s - %s\n"
          "  ISP%04X: %s @ %s hdma%c, host#=%ld, fw=%s\n",
          qla2x00_version_str, ha->model_number,
          ha->model_desc ? ha->model_desc: "", pdev->device,
          ha->isp_ops.pci_info_str(ha, pci_info), pci_name(pdev),
          ha->flags.enable_64bit_addressing ? '+': '-', ha->host_no,
          ha->isp_ops.fw_version_str(ha, fw_str));

      /* Go with fc_rport registration. */
      list_for_each_entry(fcport, &ha->fcports, list)
            qla2x00_reg_remote_port(ha, fcport);

      return 0;

probe_failed:
      qla2x00_free_device(ha);

      scsi_host_put(host);

probe_disable_device:
      pci_disable_device(pdev);

probe_out:
      return ret;
}

static void __devexit
qla2x00_remove_one(struct pci_dev *pdev)
{
      scsi_qla_host_t *ha;

      ha = pci_get_drvdata(pdev);

      qla2x00_free_sysfs_attr(ha);

      fc_remove_host(ha->host);

      scsi_remove_host(ha->host);

      qla2x00_free_device(ha);

      scsi_host_put(ha->host);

      pci_set_drvdata(pdev, NULL);
}

static void
qla2x00_free_device(scsi_qla_host_t *ha)
{
      /* Disable timer */
      if (ha->timer_active)
            qla2x00_stop_timer(ha);

      /* Kill the kernel thread for this host */
      if (ha->dpc_thread) {
            struct task_struct *t = ha->dpc_thread;

            /*
             * qla2xxx_wake_dpc checks for ->dpc_thread
             * so we need to zero it out.
             */
            ha->dpc_thread = NULL;
            kthread_stop(t);
      }

      if (ha->eft)
            qla2x00_trace_control(ha, TC_DISABLE, 0, 0);

      /* Stop currently executing firmware. */
      qla2x00_stop_firmware(ha);

      /* turn-off interrupts on the card */
      if (ha->interrupts_on)
            ha->isp_ops.disable_intrs(ha);

      qla2x00_mem_free(ha);

      ha->flags.online = 0;

      /* Detach interrupts */
      if (ha->host->irq)
            free_irq(ha->host->irq, ha);

      /* release io space registers  */
      if (ha->iobase)
            iounmap(ha->iobase);
      pci_release_regions(ha->pdev);

      pci_disable_device(ha->pdev);
}

static inline void
qla2x00_schedule_rport_del(struct scsi_qla_host *ha, fc_port_t *fcport,
    int defer)
{
      unsigned long flags;
      struct fc_rport *rport;

      if (!fcport->rport)
            return;

      rport = fcport->rport;
      if (defer) {
            spin_lock_irqsave(&fcport->rport_lock, flags);
            fcport->drport = rport;
            fcport->rport = NULL;
            *(fc_port_t **)rport->dd_data = NULL;
            spin_unlock_irqrestore(&fcport->rport_lock, flags);
            set_bit(FCPORT_UPDATE_NEEDED, &ha->dpc_flags);
      } else {
            spin_lock_irqsave(&fcport->rport_lock, flags);
            fcport->rport = NULL;
            *(fc_port_t **)rport->dd_data = NULL;
            spin_unlock_irqrestore(&fcport->rport_lock, flags);
            fc_remote_port_delete(rport);
      }
}

/*
 * qla2x00_mark_device_lost Updates fcport state when device goes offline.
 *
 * Input: ha = adapter block pointer.  fcport = port structure pointer.
 *
 * Return: None.
 *
 * Context:
 */
void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
    int do_login, int defer)
{
      if (atomic_read(&fcport->state) == FCS_ONLINE)
            qla2x00_schedule_rport_del(ha, fcport, defer);

      /*
       * We may need to retry the login, so don't change the state of the
       * port but do the retries.
       */
      if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
            atomic_set(&fcport->state, FCS_DEVICE_LOST);

      if (!do_login)
            return;

      if (fcport->login_retry == 0) {
            fcport->login_retry = ha->login_retry_count;
            set_bit(RELOGIN_NEEDED, &ha->dpc_flags);

            DEBUG(printk("scsi(%ld): Port login retry: "
                "%02x%02x%02x%02x%02x%02x%02x%02x, "
                "id = 0x%04x retry cnt=%d\n",
                ha->host_no,
                fcport->port_name[0],
                fcport->port_name[1],
                fcport->port_name[2],
                fcport->port_name[3],
                fcport->port_name[4],
                fcport->port_name[5],
                fcport->port_name[6],
                fcport->port_name[7],
                fcport->loop_id,
                fcport->login_retry));
      }
}

/*
 * qla2x00_mark_all_devices_lost
 *    Updates fcport state when device goes offline.
 *
 * Input:
 *    ha = adapter block pointer.
 *    fcport = port structure pointer.
 *
 * Return:
 *    None.
 *
 * Context:
 */
void
qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha, int defer)
{
      fc_port_t *fcport;

      list_for_each_entry(fcport, &ha->fcports, list) {
            if (fcport->port_type != FCT_TARGET)
                  continue;

            /*
             * No point in marking the device as lost, if the device is
             * already DEAD.
             */
            if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
                  continue;
            if (atomic_read(&fcport->state) == FCS_ONLINE)
                  qla2x00_schedule_rport_del(ha, fcport, defer);
            atomic_set(&fcport->state, FCS_DEVICE_LOST);
      }

      if (defer)
            qla2xxx_wake_dpc(ha);
}

/*
* qla2x00_mem_alloc
*      Allocates adapter memory.
*
* Returns:
*      0  = success.
*      1  = failure.
*/
static uint8_t
qla2x00_mem_alloc(scsi_qla_host_t *ha)
{
      char  name[16];
      uint8_t   status = 1;
      int   retry= 10;

      do {
            /*
             * This will loop only once if everything goes well, else some
             * number of retries will be performed to get around a kernel
             * bug where available mem is not allocated until after a
             * little delay and a retry.
             */
            ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
                (ha->request_q_length + 1) * sizeof(request_t),
                &ha->request_dma, GFP_KERNEL);
            if (ha->request_ring == NULL) {
                  qla_printk(KERN_WARNING, ha,
                      "Memory Allocation failed - request_ring\n");

                  qla2x00_mem_free(ha);
                  msleep(100);

                  continue;
            }

            ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
                (ha->response_q_length + 1) * sizeof(response_t),
                &ha->response_dma, GFP_KERNEL);
            if (ha->response_ring == NULL) {
                  qla_printk(KERN_WARNING, ha,
                      "Memory Allocation failed - response_ring\n");

                  qla2x00_mem_free(ha);
                  msleep(100);

                  continue;
            }

            ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
                &ha->gid_list_dma, GFP_KERNEL);
            if (ha->gid_list == NULL) {
                  qla_printk(KERN_WARNING, ha,
                      "Memory Allocation failed - gid_list\n");

                  qla2x00_mem_free(ha);
                  msleep(100);

                  continue;
            }

            snprintf(name, sizeof(name), "%s_%ld", QLA2XXX_DRIVER_NAME,
                ha->host_no);
            ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
                DMA_POOL_SIZE, 8, 0);
            if (ha->s_dma_pool == NULL) {
                  qla_printk(KERN_WARNING, ha,
                      "Memory Allocation failed - s_dma_pool\n");

                  qla2x00_mem_free(ha);
                  msleep(100);

                  continue;
            }

            /* get consistent memory allocated for init control block */
            ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
                &ha->init_cb_dma);
            if (ha->init_cb == NULL) {
                  qla_printk(KERN_WARNING, ha,
                      "Memory Allocation failed - init_cb\n");

                  qla2x00_mem_free(ha);
                  msleep(100);

                  continue;
            }
            memset(ha->init_cb, 0, ha->init_cb_size);

            if (qla2x00_allocate_sp_pool(ha)) {
                  qla_printk(KERN_WARNING, ha,
                      "Memory Allocation failed - "
                      "qla2x00_allocate_sp_pool()\n");

                  qla2x00_mem_free(ha);
                  msleep(100);

                  continue;
            }

            /* Allocate memory for SNS commands */
            if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
                  /* Get consistent memory allocated for SNS commands */
                  ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
                      sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
                      GFP_KERNEL);
                  if (ha->sns_cmd == NULL) {
                        /* error */
                        qla_printk(KERN_WARNING, ha,
                            "Memory Allocation failed - sns_cmd\n");

                        qla2x00_mem_free(ha);
                        msleep(100);

                        continue;
                  }
                  memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
            } else {
                  /* Get consistent memory allocated for MS IOCB */
                  ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
                      &ha->ms_iocb_dma);
                  if (ha->ms_iocb == NULL) {
                        /* error */
                        qla_printk(KERN_WARNING, ha,
                            "Memory Allocation failed - ms_iocb\n");

                        qla2x00_mem_free(ha);
                        msleep(100);

                        continue;
                  }
                  memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));

                  /*
                   * Get consistent memory allocated for CT SNS
                   * commands
                   */
                  ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
                      sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
                      GFP_KERNEL);
                  if (ha->ct_sns == NULL) {
                        /* error */
                        qla_printk(KERN_WARNING, ha,
                            "Memory Allocation failed - ct_sns\n");

                        qla2x00_mem_free(ha);
                        msleep(100);

                        continue;
                  }
                  memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));

                  if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
                        /*
                         * Get consistent memory allocated for SFP
                         * block.
                         */
                        ha->sfp_data = dma_pool_alloc(ha->s_dma_pool,
                            GFP_KERNEL, &ha->sfp_data_dma);
                        if (ha->sfp_data == NULL) {
                              qla_printk(KERN_WARNING, ha,
                                  "Memory Allocation failed - "
                                  "sfp_data\n");

                              qla2x00_mem_free(ha);
                              msleep(100);

                              continue;
                        }
                        memset(ha->sfp_data, 0, SFP_BLOCK_SIZE);
                  }
            }

            /* Done all allocations without any error. */
            status = 0;

      } while (retry-- && status != 0);

      if (status) {
            printk(KERN_WARNING
                  "%s(): **** FAILED ****\n", __func__);
      }

      return(status);
}

/*
* qla2x00_mem_free
*      Frees all adapter allocated memory.
*
* Input:
*      ha = adapter block pointer.
*/
static void
qla2x00_mem_free(scsi_qla_host_t *ha)
{
      struct list_head  *fcpl, *fcptemp;
      fc_port_t   *fcport;

      if (ha == NULL) {
            /* error */
            DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
            return;
      }

      /* free sp pool */
      qla2x00_free_sp_pool(ha);

      if (ha->fw_dump) {
            if (ha->eft)
                  dma_free_coherent(&ha->pdev->dev,
                      ntohl(ha->fw_dump->eft_size), ha->eft, ha->eft_dma);
            vfree(ha->fw_dump);
      }

      if (ha->sns_cmd)
            dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
                ha->sns_cmd, ha->sns_cmd_dma);

      if (ha->ct_sns)
            dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
                ha->ct_sns, ha->ct_sns_dma);

      if (ha->sfp_data)
            dma_pool_free(ha->s_dma_pool, ha->sfp_data, ha->sfp_data_dma);

      if (ha->ms_iocb)
            dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);

      if (ha->init_cb)
            dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);

      if (ha->s_dma_pool)
            dma_pool_destroy(ha->s_dma_pool);

      if (ha->gid_list)
            dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
                ha->gid_list_dma);

      if (ha->response_ring)
            dma_free_coherent(&ha->pdev->dev,
                (ha->response_q_length + 1) * sizeof(response_t),
                ha->response_ring, ha->response_dma);

      if (ha->request_ring)
            dma_free_coherent(&ha->pdev->dev,
                (ha->request_q_length + 1) * sizeof(request_t),
                ha->request_ring, ha->request_dma);

      ha->eft = NULL;
      ha->eft_dma = 0;
      ha->sns_cmd = NULL;
      ha->sns_cmd_dma = 0;
      ha->ct_sns = NULL;
      ha->ct_sns_dma = 0;
      ha->ms_iocb = NULL;
      ha->ms_iocb_dma = 0;
      ha->init_cb = NULL;
      ha->init_cb_dma = 0;

      ha->s_dma_pool = NULL;

      ha->gid_list = NULL;
      ha->gid_list_dma = 0;

      ha->response_ring = NULL;
      ha->response_dma = 0;
      ha->request_ring = NULL;
      ha->request_dma = 0;

      list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
            fcport = list_entry(fcpl, fc_port_t, list);

            /* fc ports */
            list_del_init(&fcport->list);
            kfree(fcport);
      }
      INIT_LIST_HEAD(&ha->fcports);

      ha->fw_dump = NULL;
      ha->fw_dumped = 0;
      ha->fw_dump_reading = 0;

      vfree(ha->optrom_buffer);
}

/*
 * qla2x00_allocate_sp_pool
 *     This routine is called during initialization to allocate
 *     memory for local srb_t.
 *
 * Input:
 *     ha   = adapter block pointer.
 *
 * Context:
 *      Kernel context.
 */
static int
qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
{
      int      rval;

      rval = QLA_SUCCESS;
      ha->srb_mempool = mempool_create_slab_pool(SRB_MIN_REQ, srb_cachep);
      if (ha->srb_mempool == NULL) {
            qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
            rval = QLA_FUNCTION_FAILED;
      }
      return (rval);
}

/*
 *  This routine frees all adapter allocated memory.
 *
 */
static void
qla2x00_free_sp_pool( scsi_qla_host_t *ha)
{
      if (ha->srb_mempool) {
            mempool_destroy(ha->srb_mempool);
            ha->srb_mempool = NULL;
      }
}

/**************************************************************************
* qla2x00_do_dpc
*   This kernel thread is a task that is schedule by the interrupt handler
*   to perform the background processing for interrupts.
*
* Notes:
* This task always run in the context of a kernel thread.  It
* is kick-off by the driver's detect code and starts up
* up one per adapter. It immediately goes to sleep and waits for
* some fibre event.  When either the interrupt handler or
* the timer routine detects a event it will one of the task
* bits then wake us up.
**************************************************************************/
static int
qla2x00_do_dpc(void *data)
{
      scsi_qla_host_t *ha;
      fc_port_t   *fcport;
      uint8_t           status;
      uint16_t    next_loopid;

      ha = (scsi_qla_host_t *)data;

      set_user_nice(current, -20);

      while (!kthread_should_stop()) {
            DEBUG3(printk("qla2x00: DPC handler sleeping\n"));

            set_current_state(TASK_INTERRUPTIBLE);
            schedule();
            __set_current_state(TASK_RUNNING);

            DEBUG3(printk("qla2x00: DPC handler waking up\n"));

            /* Initialization not yet finished. Don't do anything yet. */
            if (!ha->flags.init_done)
                  continue;

            DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));

            ha->dpc_active = 1;

            if (ha->flags.mbox_busy) {
                  ha->dpc_active = 0;
                  continue;
            }

            if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {

                  DEBUG(printk("scsi(%ld): dpc: sched "
                      "qla2x00_abort_isp ha = %p\n",
                      ha->host_no, ha));
                  if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
                      &ha->dpc_flags))) {

                        if (qla2x00_abort_isp(ha)) {
                              /* failed. retry later */
                              set_bit(ISP_ABORT_NEEDED,
                                  &ha->dpc_flags);
                        }
                        clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
                  }
                  DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
                      ha->host_no));
            }

            if (test_and_clear_bit(FCPORT_UPDATE_NEEDED, &ha->dpc_flags))
                  qla2x00_update_fcports(ha);

            if (test_and_clear_bit(LOOP_RESET_NEEDED, &ha->dpc_flags)) {
                  DEBUG(printk("scsi(%ld): dpc: sched loop_reset()\n",
                      ha->host_no));
                  qla2x00_loop_reset(ha);
            }

            if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
                (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {

                  DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
                      ha->host_no));

                  qla2x00_rst_aen(ha);
                  clear_bit(RESET_ACTIVE, &ha->dpc_flags);
            }

            /* Retry each device up to login retry count */
            if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
                !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
                atomic_read(&ha->loop_state) != LOOP_DOWN) {

                  DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
                      ha->host_no));

                  next_loopid = 0;
                  list_for_each_entry(fcport, &ha->fcports, list) {
                        /*
                         * If the port is not ONLINE then try to login
                         * to it if we haven't run out of retries.
                         */
                        if (atomic_read(&fcport->state) != FCS_ONLINE &&
                            fcport->login_retry) {

                              fcport->login_retry--;
                              if (fcport->flags & FCF_FABRIC_DEVICE) {
                                    if (fcport->flags &
                                        FCF_TAPE_PRESENT)
                                          ha->isp_ops.fabric_logout(
                                              ha, fcport->loop_id,
                                              fcport->d_id.b.domain,
                                              fcport->d_id.b.area,
                                              fcport->d_id.b.al_pa);
                                    status = qla2x00_fabric_login(
                                        ha, fcport, &next_loopid);
                              } else
                                    status =
                                        qla2x00_local_device_login(
                                          ha, fcport);

                              if (status == QLA_SUCCESS) {
                                    fcport->old_loop_id = fcport->loop_id;

                                    DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
                                        ha->host_no, fcport->loop_id));

                                    qla2x00_update_fcport(ha,
                                        fcport);
                              } else if (status == 1) {
                                    set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
                                    /* retry the login again */
                                    DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
                                        ha->host_no,
                                        fcport->login_retry, fcport->loop_id));
                              } else {
                                    fcport->login_retry = 0;
                              }
                        }
                        if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
                              break;
                  }
                  DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
                      ha->host_no));
            }

            if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
                atomic_read(&ha->loop_state) != LOOP_DOWN) {

                  clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
                  DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
                      ha->host_no));

                  set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);

                  DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
                      ha->host_no));
            }

            if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {

                  DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
                      ha->host_no));

                  if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
                      &ha->dpc_flags))) {

                        qla2x00_loop_resync(ha);

                        clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
                  }

                  DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
                      ha->host_no));
            }

            if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {

                  DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
                      ha->host_no));

                  qla2x00_rescan_fcports(ha);

                  DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
                      "end.\n",
                      ha->host_no));
            }

            if (!ha->interrupts_on)
                  ha->isp_ops.enable_intrs(ha);

            if (test_and_clear_bit(BEACON_BLINK_NEEDED, &ha->dpc_flags))
                  ha->isp_ops.beacon_blink(ha);

            ha->dpc_active = 0;
      } /* End of while(1) */

      DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));

      /*
       * Make sure that nobody tries to wake us up again.
       */
      ha->dpc_active = 0;

      return 0;
}

void
qla2xxx_wake_dpc(scsi_qla_host_t *ha)
{
      if (ha->dpc_thread)
            wake_up_process(ha->dpc_thread);
}

/*
*  qla2x00_rst_aen
*      Processes asynchronous reset.
*
* Input:
*      ha  = adapter block pointer.
*/
static void
qla2x00_rst_aen(scsi_qla_host_t *ha)
{
      if (ha->flags.online && !ha->flags.reset_active &&
          !atomic_read(&ha->loop_down_timer) &&
          !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
            do {
                  clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);

                  /*
                   * Issue marker command only when we are going to start
                   * the I/O.
                   */
                  ha->marker_needed = 1;
            } while (!atomic_read(&ha->loop_down_timer) &&
                (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
      }
}

static void
qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
{
      struct scsi_cmnd *cmd = sp->cmd;

      if (sp->flags & SRB_DMA_VALID) {
            if (cmd->use_sg) {
                  dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
                      cmd->use_sg, cmd->sc_data_direction);
            } else if (cmd->request_bufflen) {
                  dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
                      cmd->request_bufflen, cmd->sc_data_direction);
            }
            sp->flags &= ~SRB_DMA_VALID;
      }
      CMD_SP(cmd) = NULL;
}

void
qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
{
      struct scsi_cmnd *cmd = sp->cmd;

      qla2x00_sp_free_dma(ha, sp);

      mempool_free(sp, ha->srb_mempool);

      cmd->scsi_done(cmd);
}

/**************************************************************************
*   qla2x00_timer
*
* Description:
*   One second timer
*
* Context: Interrupt
***************************************************************************/
static void
qla2x00_timer(scsi_qla_host_t *ha)
{
      unsigned long     cpu_flags = 0;
      fc_port_t   *fcport;
      int         start_dpc = 0;
      int         index;
      srb_t       *sp;
      int         t;

      /*
       * Ports - Port down timer.
       *
       * Whenever, a port is in the LOST state we start decrementing its port
       * down timer every second until it reaches zero. Once  it reaches zero
       * the port it marked DEAD.
       */
      t = 0;
      list_for_each_entry(fcport, &ha->fcports, list) {
            if (fcport->port_type != FCT_TARGET)
                  continue;

            if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {

                  if (atomic_read(&fcport->port_down_timer) == 0)
                        continue;

                  if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
                        atomic_set(&fcport->state, FCS_DEVICE_DEAD);

                  DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
                      "%d remaining\n",
                      ha->host_no,
                      t, atomic_read(&fcport->port_down_timer)));
            }
            t++;
      } /* End of for fcport  */


      /* Loop down handler. */
      if (atomic_read(&ha->loop_down_timer) > 0 &&
          !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {

            if (atomic_read(&ha->loop_down_timer) ==
                ha->loop_down_abort_time) {

                  DEBUG(printk("scsi(%ld): Loop Down - aborting the "
                      "queues before time expire\n",
                      ha->host_no));

                  if (!IS_QLA2100(ha) && ha->link_down_timeout)
                        atomic_set(&ha->loop_state, LOOP_DEAD);

                  /* Schedule an ISP abort to return any tape commands. */
                  spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
                  for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
                      index++) {
                        fc_port_t *sfcp;

                        sp = ha->outstanding_cmds[index];
                        if (!sp)
                              continue;
                        sfcp = sp->fcport;
                        if (!(sfcp->flags & FCF_TAPE_PRESENT))
                              continue;

                        set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
                        break;
                  }
                  spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);

                  set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
                  start_dpc++;
            }

            /* if the loop has been down for 4 minutes, reinit adapter */
            if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
                  DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
                      "restarting queues.\n",
                      ha->host_no));

                  set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
                  start_dpc++;

                  if (!(ha->device_flags & DFLG_NO_CABLE)) {
                        DEBUG(printk("scsi(%ld): Loop down - "
                            "aborting ISP.\n",
                            ha->host_no));
                        qla_printk(KERN_WARNING, ha,
                            "Loop down - aborting ISP.\n");

                        set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
                  }
            }
            DEBUG3(printk("scsi(%ld): Loop Down - seconds remaining %d\n",
                ha->host_no,
                atomic_read(&ha->loop_down_timer)));
      }

      /* Check if beacon LED needs to be blinked */
      if (ha->beacon_blink_led == 1) {
            set_bit(BEACON_BLINK_NEEDED, &ha->dpc_flags);
            start_dpc++;
      }

      /* Schedule the DPC routine if needed */
      if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
          test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
          test_bit(LOOP_RESET_NEEDED, &ha->dpc_flags) ||
          test_bit(FCPORT_UPDATE_NEEDED, &ha->dpc_flags) ||
          start_dpc ||
          test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
          test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
          test_bit(BEACON_BLINK_NEEDED, &ha->dpc_flags) ||
          test_bit(RELOGIN_NEEDED, &ha->dpc_flags)))
            qla2xxx_wake_dpc(ha);

      qla2x00_restart_timer(ha, WATCH_INTERVAL);
}

/* XXX(hch): crude hack to emulate a down_timeout() */
int
qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
{
      const unsigned int step = 100; /* msecs */
      unsigned int iterations = jiffies_to_msecs(timeout)/100;

      do {
            if (!down_trylock(sema))
                  return 0;
            if (msleep_interruptible(step))
                  break;
      } while (--iterations >= 0);

      return -ETIMEDOUT;
}

/* Firmware interface routines. */

#define FW_BLOBS  5
#define FW_ISP21XX      0
#define FW_ISP22XX      1
#define FW_ISP2300      2
#define FW_ISP2322      3
#define FW_ISP24XX      4

static DECLARE_MUTEX(qla_fw_lock);

static struct fw_blob qla_fw_blobs[FW_BLOBS] = {
      { .name = "ql2100_fw.bin", .segs = { 0x1000, 0 }, },
      { .name = "ql2200_fw.bin", .segs = { 0x1000, 0 }, },
      { .name = "ql2300_fw.bin", .segs = { 0x800, 0 }, },
      { .name = "ql2322_fw.bin", .segs = { 0x800, 0x1c000, 0x1e000, 0 }, },
      { .name = "ql2400_fw.bin", },
};

struct fw_blob *
qla2x00_request_firmware(scsi_qla_host_t *ha)
{
      struct fw_blob *blob;

      blob = NULL;
      if (IS_QLA2100(ha)) {
            blob = &qla_fw_blobs[FW_ISP21XX];
      } else if (IS_QLA2200(ha)) {
            blob = &qla_fw_blobs[FW_ISP22XX];
      } else if (IS_QLA2300(ha) || IS_QLA2312(ha) || IS_QLA6312(ha)) {
            blob = &qla_fw_blobs[FW_ISP2300];
      } else if (IS_QLA2322(ha) || IS_QLA6322(ha)) {
            blob = &qla_fw_blobs[FW_ISP2322];
      } else if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
            blob = &qla_fw_blobs[FW_ISP24XX];
      }

      down(&qla_fw_lock);
      if (blob->fw)
            goto out;

      if (request_firmware(&blob->fw, blob->name, &ha->pdev->dev)) {
            DEBUG2(printk("scsi(%ld): Failed to load firmware image "
                "(%s).\n", ha->host_no, blob->name));
            blob->fw = NULL;
            blob = NULL;
            goto out;
      }

out:
      up(&qla_fw_lock);
      return blob;
}

static void
qla2x00_release_firmware(void)
{
      int idx;

      down(&qla_fw_lock);
      for (idx = 0; idx < FW_BLOBS; idx++)
            if (qla_fw_blobs[idx].fw)
                  release_firmware(qla_fw_blobs[idx].fw);
      up(&qla_fw_lock);
}

static struct pci_device_id qla2xxx_pci_tbl[] = {
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2100) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2200) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2300) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2312) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2322) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP6312) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP6322) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2422) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2432) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP5422) },
      { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP5432) },
      { 0 },
};
MODULE_DEVICE_TABLE(pci, qla2xxx_pci_tbl);

static struct pci_driver qla2xxx_pci_driver = {
      .name       = QLA2XXX_DRIVER_NAME,
      .driver           = {
            .owner            = THIS_MODULE,
      },
      .id_table   = qla2xxx_pci_tbl,
      .probe            = qla2x00_probe_one,
      .remove           = __devexit_p(qla2x00_remove_one),
};

/**
 * qla2x00_module_init - Module initialization.
 **/
static int __init
qla2x00_module_init(void)
{
      int ret = 0;

      /* Allocate cache for SRBs. */
      srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0,
          SLAB_HWCACHE_ALIGN, NULL, NULL);
      if (srb_cachep == NULL) {
            printk(KERN_ERR
                "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
            return -ENOMEM;
      }

      /* Derive version string. */
      strcpy(qla2x00_version_str, QLA2XXX_VERSION);
      if (extended_error_logging)
            strcat(qla2x00_version_str, "-debug");

      qla2xxx_transport_template =
          fc_attach_transport(&qla2xxx_transport_functions);
      if (!qla2xxx_transport_template)
            return -ENODEV;

      printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
      ret = pci_register_driver(&qla2xxx_pci_driver);
      if (ret) {
            kmem_cache_destroy(srb_cachep);
            fc_release_transport(qla2xxx_transport_template);
      }
      return ret;
}

/**
 * qla2x00_module_exit - Module cleanup.
 **/
static void __exit
qla2x00_module_exit(void)
{
      pci_unregister_driver(&qla2xxx_pci_driver);
      qla2x00_release_firmware();
      kmem_cache_destroy(srb_cachep);
      fc_release_transport(qla2xxx_transport_template);
}

module_init(qla2x00_module_init);
module_exit(qla2x00_module_exit);

MODULE_AUTHOR("QLogic Corporation");
MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(QLA2XXX_VERSION);

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