Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 4456 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
new file mode 100644
index 000000000000..b5863d8769e0
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -0,0 +1,4456 @@
+/*
+ *                  QLOGIC LINUX SOFTWARE
+ *
+ * QLogic ISP2x00 device driver for Linux 2.6.x
+ * Copyright (C) 2003-2004 QLogic Corporation
+ * (www.qlogic.com)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ */
+#include "qla_def.h"
+
+#include <linux/moduleparam.h>
+#include <linux/vmalloc.h>
+#include <linux/smp_lock.h>
+#include <linux/delay.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
+ */
+char srb_cachep_name[16];
+kmem_cache_t *srb_cachep;
+
+/*
+ * Stats for all adpaters.
+ */
+struct _qla2x00stats qla2x00_stats;
+
+/*
+ * Ioctl related information.
+ */
+int num_hosts;
+int apiHBAInstance;
+
+/*
+ * Module parameter information and variables
+ */
+int ql2xmaxqdepth;
+module_param(ql2xmaxqdepth, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(ql2xmaxqdepth,
+		"Maximum queue depth to report for target devices.");
+
+int ql2xlogintimeout = 20;
+module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(ql2xlogintimeout,
+		"Login timeout value in seconds.");
+
+int qlport_down_retry;
+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 ql2xretrycount = 20;
+module_param(ql2xretrycount, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(ql2xretrycount,
+		"Maximum number of mid-layer retries allowed for a command.  "
+		"Default value is 20, ");
+
+int displayConfig;
+module_param(displayConfig, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(displayConfig,
+		"If 1 then display the configuration used in /etc/modprobe.conf.");
+
+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 ql2xenablezio = 0;
+module_param(ql2xenablezio, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(ql2xenablezio,
+		"Option to enable ZIO:If 1 then enable it otherwise" 
+		" use the default set in the NVRAM."
+		" Default is 0 : disabled");
+
+int ql2xintrdelaytimer = 10;
+module_param(ql2xintrdelaytimer, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(ql2xintrdelaytimer,
+		"ZIO: Waiting time for Firmware before it generates an "
+		"interrupt to the host to notify completion of request.");
+
+int ConfigRequired;
+module_param(ConfigRequired, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(ConfigRequired,
+		"If 1, then only configured devices passed in through the"
+		"ql2xopts parameter will be presented to the OS");
+
+int Bind = BIND_BY_PORT_NAME;
+module_param(Bind, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(Bind,
+		"Target persistent binding method: "
+		"0 by Portname (default); 1 by PortID; 2 by Nodename. ");
+
+int ql2xsuspendcount = SUSPEND_COUNT;
+module_param(ql2xsuspendcount, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(ql2xsuspendcount,
+		"Number of 6-second suspend iterations to perform while a "
+		"target returns a <NOT READY> status.  Default is 10 "
+		"iterations.");
+
+int ql2xdoinitscan = 1;
+module_param(ql2xdoinitscan, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(ql2xdoinitscan,
+		"Signal mid-layer to perform scan after driver load: 0 -- no "
+		"signal sent to mid-layer.");
+
+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.");
+
+/*
+ * Proc structures and functions
+ */
+struct info_str {
+	char	*buffer;
+	int	length;
+	off_t	offset;
+	int	pos;
+};
+
+static void copy_mem_info(struct info_str *, char *, int);
+static int copy_info(struct info_str *, char *, ...);
+
+static void qla2x00_free_device(scsi_qla_host_t *);
+
+static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
+
+/*
+ * SCSI host template entry points 
+ */
+static int qla2xxx_slave_configure(struct scsi_device * device);
+static int qla2x00_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_proc_info(struct Scsi_Host *, char *, char **,
+    off_t, int, int);
+
+static struct scsi_host_template qla2x00_driver_template = {
+	.module			= THIS_MODULE,
+	.name			= "qla2xxx",
+	.proc_name		= "qla2xxx",
+	.proc_info		= qla2x00_proc_info,
+	.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,
+
+	.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,
+};
+
+static struct scsi_transport_template *qla2xxx_transport_template = NULL;
+
+static void qla2x00_display_fc_names(scsi_qla_host_t *);
+
+/* 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;
+}
+
+void qla2x00_cmd_timeout(srb_t *);
+
+static __inline__ void qla2x00_callback(scsi_qla_host_t *, struct scsi_cmnd *);
+static __inline__ void sp_put(struct scsi_qla_host * ha, srb_t *sp);
+static __inline__ void sp_get(struct scsi_qla_host * ha, srb_t *sp);
+static __inline__ void
+qla2x00_delete_from_done_queue(scsi_qla_host_t *, srb_t *); 
+
+/*
+* qla2x00_callback
+*      Returns the completed SCSI command to LINUX.
+*
+* Input:
+*	ha -- Host adapter structure
+*	cmd -- SCSI mid-level command structure.
+* Returns:
+*      None
+* Note:From failover point of view we always get the sp
+*      from vis_ha pool in queuecommand.So when we put it 
+*      back to the pool it has to be the vis_ha.	 
+*      So rely on struct scsi_cmnd to get the vis_ha and not on sp. 		 	
+*/
+static inline void
+qla2x00_callback(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
+{
+	srb_t *sp = (srb_t *) CMD_SP(cmd);
+	scsi_qla_host_t *vis_ha;
+	os_lun_t *lq;
+	int got_sense;
+	unsigned long	cpu_flags = 0;
+
+	cmd->host_scribble = (unsigned char *) NULL;
+	vis_ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
+
+	if (sp == NULL) {
+		qla_printk(KERN_INFO, ha,
+			"%s(): **** CMD derives a NULL SP\n",
+			__func__);
+                DEBUG2(BUG();)
+		return;
+	}
+
+	/*
+	 * If command status is not DID_BUS_BUSY then go ahead and freed sp.
+	 */
+	/*
+	 * Cancel command timeout
+	 */
+	qla2x00_delete_timer_from_cmd(sp);
+
+	/*
+	 * Put SP back in the free queue
+	 */
+	sp->cmd   = NULL;
+	CMD_SP(cmd) = NULL;
+	lq = sp->lun_queue;
+	got_sense = (sp->flags & SRB_GOT_SENSE)? 1: 0;
+	add_to_free_queue(vis_ha, sp);
+
+	if (host_byte(cmd->result) == DID_OK) {
+		/* device ok */
+		ha->total_bytes += cmd->bufflen;
+		if (!got_sense) {
+			/* If lun was suspended then clear retry count */
+			spin_lock_irqsave(&lq->q_lock, cpu_flags);
+			if (!test_bit(LUN_EXEC_DELAYED, &lq->q_flag))
+				lq->q_state = LUN_STATE_READY;
+			spin_unlock_irqrestore(&lq->q_lock, cpu_flags);
+		}
+	} else if (host_byte(cmd->result) == DID_ERROR) {
+		/* device error */
+		ha->total_dev_errs++;
+	}
+
+	/* Call the mid-level driver interrupt handler */
+	(*(cmd)->scsi_done)(cmd);
+}
+
+/**************************************************************************
+* sp_put
+*
+* Description:
+*   Decrement reference count and call the callback if we're the last
+*   owner of the specified sp. Will get the host_lock before calling
+*   the callback.
+*
+* Input:
+*   ha - pointer to the scsi_qla_host_t where the callback is to occur.
+*   sp - pointer to srb_t structure to use.
+*
+* Returns:
+*
+**************************************************************************/
+static inline void
+sp_put(struct scsi_qla_host * ha, srb_t *sp)
+{
+        if (atomic_read(&sp->ref_count) == 0) {
+		qla_printk(KERN_INFO, ha,
+			"%s(): **** SP->ref_count not zero\n",
+			__func__);
+                DEBUG2(BUG();)
+
+                return;
+	}
+
+        if (!atomic_dec_and_test(&sp->ref_count)) {
+                return;
+        }
+
+        qla2x00_callback(ha, sp->cmd);
+}
+
+/**************************************************************************
+* sp_get
+*
+* Description:
+*   Increment reference count of the specified sp.
+*
+* Input:
+*   sp - pointer to srb_t structure to use.
+*
+* Returns:
+*
+**************************************************************************/
+static inline void
+sp_get(struct scsi_qla_host * ha, srb_t *sp)
+{
+        atomic_inc(&sp->ref_count);
+
+        if (atomic_read(&sp->ref_count) > 2) {
+		qla_printk(KERN_INFO, ha,
+			"%s(): **** SP->ref_count greater than two\n",
+			__func__);
+                DEBUG2(BUG();)
+
+		return;
+	}
+}
+
+static inline void 
+qla2x00_delete_from_done_queue(scsi_qla_host_t *dest_ha, srb_t *sp) 
+{
+	/* remove command from done list */
+	list_del_init(&sp->list);
+	dest_ha->done_q_cnt--;
+	sp->state = SRB_NO_QUEUE_STATE;
+
+	if (sp->flags & SRB_DMA_VALID) {
+		sp->flags &= ~SRB_DMA_VALID;
+
+		/* Release memory used for this I/O */
+		if (sp->cmd->use_sg) {
+			pci_unmap_sg(dest_ha->pdev, sp->cmd->request_buffer,
+			    sp->cmd->use_sg, sp->cmd->sc_data_direction);
+		} else if (sp->cmd->request_bufflen) {
+			pci_unmap_page(dest_ha->pdev, sp->dma_handle,
+			    sp->cmd->request_bufflen,
+			    sp->cmd->sc_data_direction);
+		}
+	}
+}
+
+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 srb_t *qla2x00_get_new_sp(scsi_qla_host_t *ha);
+
+static ssize_t qla2x00_sysfs_read_fw_dump(struct kobject *, char *, loff_t,
+    size_t);
+static ssize_t qla2x00_sysfs_write_fw_dump(struct kobject *, char *, loff_t,
+    size_t);
+static struct bin_attribute sysfs_fw_dump_attr = {
+	.attr = {
+		.name = "fw_dump",
+		.mode = S_IRUSR | S_IWUSR,
+		.owner = THIS_MODULE,
+	},
+	.size = 0,
+	.read = qla2x00_sysfs_read_fw_dump,
+	.write = qla2x00_sysfs_write_fw_dump,
+};
+static ssize_t qla2x00_sysfs_read_nvram(struct kobject *, char *, loff_t,
+    size_t);
+static ssize_t qla2x00_sysfs_write_nvram(struct kobject *, char *, loff_t,
+    size_t);
+static struct bin_attribute sysfs_nvram_attr = {
+	.attr = {
+		.name = "nvram",
+		.mode = S_IRUSR | S_IWUSR,
+		.owner = THIS_MODULE,
+	},
+	.size = sizeof(nvram_t),
+	.read = qla2x00_sysfs_read_nvram,
+	.write = qla2x00_sysfs_write_nvram,
+};
+
+/* -------------------------------------------------------------------------- */
+
+
+/* SysFS attributes. */
+static ssize_t qla2x00_sysfs_read_fw_dump(struct kobject *kobj, char *buf,
+    loff_t off, size_t count)
+{
+	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+	    struct device, kobj)));
+
+	if (ha->fw_dump_reading == 0)
+		return 0;
+	if (off > ha->fw_dump_buffer_len)
+		return 0;
+	if (off + count > ha->fw_dump_buffer_len)
+		count = ha->fw_dump_buffer_len - off;
+
+	memcpy(buf, &ha->fw_dump_buffer[off], count);
+
+	return (count);
+}
+
+static ssize_t qla2x00_sysfs_write_fw_dump(struct kobject *kobj, char *buf,
+    loff_t off, size_t count)
+{
+	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+	    struct device, kobj)));
+	int reading;
+	uint32_t dump_size;
+
+	if (off != 0)
+		return (0);
+
+	reading = simple_strtol(buf, NULL, 10);
+	switch (reading) {
+	case 0:
+		if (ha->fw_dump_reading == 1) {
+			qla_printk(KERN_INFO, ha,
+			    "Firmware dump cleared on (%ld).\n",
+			    ha->host_no);
+
+			vfree(ha->fw_dump_buffer);
+			free_pages((unsigned long)ha->fw_dump,
+			    ha->fw_dump_order);
+
+			ha->fw_dump_reading = 0;
+			ha->fw_dump_buffer = NULL;
+			ha->fw_dump = NULL;
+		}
+		break;
+	case 1:
+		if (ha->fw_dump != NULL && !ha->fw_dump_reading) {
+			ha->fw_dump_reading = 1;
+
+			dump_size = FW_DUMP_SIZE_1M;
+			if (ha->fw_memory_size < 0x20000) 
+				dump_size = FW_DUMP_SIZE_128K;
+			else if (ha->fw_memory_size < 0x80000) 
+				dump_size = FW_DUMP_SIZE_512K;
+			ha->fw_dump_buffer = (char *)vmalloc(dump_size);
+			if (ha->fw_dump_buffer == NULL) {
+				qla_printk(KERN_WARNING, ha,
+				    "Unable to allocate memory for firmware "
+				    "dump buffer (%d).\n", dump_size);
+
+				ha->fw_dump_reading = 0;
+				return (count);
+			}
+			qla_printk(KERN_INFO, ha,
+			    "Firmware dump ready for read on (%ld).\n",
+			    ha->host_no);
+			memset(ha->fw_dump_buffer, 0, dump_size);
+			if (IS_QLA2100(ha) || IS_QLA2200(ha))
+ 				qla2100_ascii_fw_dump(ha);
+ 			else
+ 				qla2300_ascii_fw_dump(ha);
+			ha->fw_dump_buffer_len = strlen(ha->fw_dump_buffer);
+		}
+		break;
+	}
+	return (count);
+}
+
+static ssize_t qla2x00_sysfs_read_nvram(struct kobject *kobj, char *buf,
+    loff_t off, size_t count)
+{
+	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+	    struct device, kobj)));
+	uint16_t	*witer;
+	unsigned long	flags;
+	uint16_t	cnt;
+
+	if (!capable(CAP_SYS_ADMIN) || off != 0 || count != sizeof(nvram_t))
+		return 0;
+
+	/* Read NVRAM. */
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	qla2x00_lock_nvram_access(ha);
+ 	witer = (uint16_t *)buf;
+ 	for (cnt = 0; cnt < count / 2; cnt++) {
+		*witer = cpu_to_le16(qla2x00_get_nvram_word(ha,
+		    cnt+ha->nvram_base));
+		witer++;
+ 	}
+	qla2x00_unlock_nvram_access(ha);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return (count);
+}
+
+static ssize_t qla2x00_sysfs_write_nvram(struct kobject *kobj, char *buf,
+    loff_t off, size_t count)
+{
+	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+	    struct device, kobj)));
+	uint8_t		*iter;
+	uint16_t	*witer;
+	unsigned long	flags;
+	uint16_t	cnt;
+	uint8_t		chksum;
+
+	if (!capable(CAP_SYS_ADMIN) || off != 0 || count != sizeof(nvram_t))
+		return 0;
+
+	/* Checksum NVRAM. */
+	iter = (uint8_t *)buf;
+	chksum = 0;
+	for (cnt = 0; cnt < count - 1; cnt++)
+		chksum += *iter++;
+	chksum = ~chksum + 1;
+	*iter = chksum;
+
+	/* Write NVRAM. */
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	qla2x00_lock_nvram_access(ha);
+	qla2x00_release_nvram_protection(ha);
+ 	witer = (uint16_t *)buf;
+	for (cnt = 0; cnt < count / 2; cnt++) {
+		qla2x00_write_nvram_word(ha, cnt+ha->nvram_base,
+		    cpu_to_le16(*witer));
+		witer++;
+	}
+	qla2x00_unlock_nvram_access(ha);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	return (count);
+}
+
+/* -------------------------------------------------------------------------- */
+static char *
+qla2x00_get_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);
+}
+
+char *
+qla2x00_get_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);
+}
+
+/**************************************************************************
+* qla2x00_queuecommand
+*
+* Description:
+*     Queue a command to the controller.
+*
+* Input:
+*     cmd - pointer to Scsi cmd structure
+*     fn - pointer to Scsi done function
+*
+* Returns:
+*   0 - Always
+*
+* Note:
+* The mid-level driver tries to ensures that queuecommand never gets invoked
+* concurrently with itself or the interrupt handler (although the
+* interrupt handler may call this routine as part of request-completion
+* handling).
+**************************************************************************/
+static int
+qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*fn)(struct scsi_cmnd *))
+{
+	fc_port_t	*fcport;
+	os_lun_t	*lq;
+	os_tgt_t	*tq;
+	scsi_qla_host_t	*ha, *ha2;
+	srb_t		*sp;
+	struct Scsi_Host *host;
+	unsigned int	b, t, l;
+	unsigned long	handle;
+	int		was_empty;
+
+
+	host = cmd->device->host;
+	ha = (scsi_qla_host_t *) host->hostdata;
+	was_empty = 1;
+
+	cmd->scsi_done = fn;
+
+	spin_unlock_irq(ha->host->host_lock);
+
+	/*
+	 * Allocate a command packet from the "sp" pool.  If we cant get back
+	 * one then let scsi layer come back later.
+	 */
+	if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
+		qla_printk(KERN_WARNING, ha,
+		    "Couldn't allocate memory for sp - retried.\n");
+
+		spin_lock_irq(ha->host->host_lock);
+
+		return (1);
+	}
+
+	sp->cmd = cmd;
+	CMD_SP(cmd) = (void *)sp;
+
+	sp->flags = 0;
+	if (CMD_RESID_LEN(cmd) & SRB_IOCTL) {
+		/* Need to set sp->flags */
+		sp->flags |= SRB_IOCTL;
+		CMD_RESID_LEN(cmd) = 0; /* Clear it since no more use. */
+	}
+
+	sp->fo_retry_cnt = 0;
+	sp->err_id = 0;
+
+	/* Generate LU queue on bus, target, LUN */
+	b = cmd->device->channel;
+	t = cmd->device->id;
+	l = cmd->device->lun;
+
+	/*
+	 * Start Command Timer. Typically it will be 2 seconds less than what
+	 * is requested by the Host such that we can return the IO before
+	 * aborts are called.
+	 */
+	if ((cmd->timeout_per_command / HZ) > QLA_CMD_TIMER_DELTA)
+		qla2x00_add_timer_to_cmd(sp,
+		    (cmd->timeout_per_command / HZ) - QLA_CMD_TIMER_DELTA);
+	else
+		qla2x00_add_timer_to_cmd(sp, cmd->timeout_per_command / HZ);
+
+	if (l >= ha->max_luns) {
+		cmd->result = DID_NO_CONNECT << 16;
+		sp->err_id = SRB_ERR_PORT;
+
+		spin_lock_irq(ha->host->host_lock);
+
+		sp_put(ha, sp);
+
+		return (0);
+	}
+
+	if ((tq = (os_tgt_t *) TGT_Q(ha, t)) != NULL &&
+	    (lq = (os_lun_t *) LUN_Q(ha, t, l)) != NULL) {
+		fcport = lq->fclun->fcport;
+		ha2 = fcport->ha;
+	} else {
+		lq = NULL;
+		fcport = NULL;
+		ha2 = ha;
+	}
+
+	/* Set an invalid handle until we issue the command to ISP */
+	/* then we will set the real handle value.                 */
+	handle = INVALID_HANDLE;
+	cmd->host_scribble = (unsigned char *)handle;
+
+	/* Bookkeeping information */
+	sp->r_start = jiffies;		/* Time the request was recieved. */
+	sp->u_start = 0;
+
+	/* Setup device queue pointers. */
+	sp->tgt_queue = tq;
+	sp->lun_queue = lq;
+
+	/*
+	 * NOTE : q is NULL
+	 *
+	 * 1. When device is added from persistent binding but has not been
+	 *    discovered yet.The state of loopid == PORT_AVAIL.
+	 * 2. When device is never found on the bus.(loopid == UNUSED)
+	 *
+	 * IF Device Queue is not created, or device is not in a valid state
+	 * and link down error reporting is enabled, reject IO.
+	 */
+	if (fcport == NULL) {
+		DEBUG3(printk("scsi(%ld:%2d:%2d): port unavailable\n",
+		    ha->host_no,t,l));
+
+		cmd->result = DID_NO_CONNECT << 16;
+		sp->err_id = SRB_ERR_PORT;
+
+		spin_lock_irq(ha->host->host_lock);
+
+		sp_put(ha, sp);
+
+		return (0);
+	}
+
+	/* Only modify the allowed count if the target is a *non* tape device */
+	if ((fcport->flags & FCF_TAPE_PRESENT) == 0) {
+		sp->flags &= ~SRB_TAPE;
+		if (cmd->allowed < ql2xretrycount) {
+			cmd->allowed = ql2xretrycount;
+		}
+	} else
+		sp->flags |= SRB_TAPE;
+
+	DEBUG5(printk("scsi(%ld:%2d:%2d): (queuecmd) queue sp = %p, "
+	    "flags=0x%x fo retry=%d, pid=%ld\n",
+	    ha->host_no, t, l, sp, sp->flags, sp->fo_retry_cnt,
+	    cmd->serial_number));
+	DEBUG5(qla2x00_print_scsi_cmd(cmd));
+
+	sp->fclun = lq->fclun;
+	sp->ha = ha2;
+
+	if (cmd->sc_data_direction == DMA_BIDIRECTIONAL &&
+	    cmd->request_bufflen != 0) {
+
+		DEBUG2(printk(KERN_WARNING
+		    "scsi(%ld): Incorrect data direction - transfer "
+		    "length=%d, direction=%d, pid=%ld, opcode=%x\n",
+		    ha->host_no, cmd->request_bufflen, cmd->sc_data_direction,
+		    cmd->serial_number, cmd->cmnd[0]));
+	}
+
+	/* Final pre-check :
+	 *
+	 *	Either PORT_DOWN_TIMER OR LINK_DOWN_TIMER Expired.
+	 */
+	if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
+	    atomic_read(&ha2->loop_state) == LOOP_DEAD) {
+		/*
+		 * Add the command to the done-queue for later failover
+		 * processing.
+		 */
+		cmd->result = DID_NO_CONNECT << 16;
+		if (atomic_read(&ha2->loop_state) == LOOP_DOWN) 
+			sp->err_id = SRB_ERR_LOOP;
+		else
+			sp->err_id = SRB_ERR_PORT;
+
+		add_to_done_queue(ha, sp);
+		qla2x00_done(ha);
+
+		spin_lock_irq(ha->host->host_lock);
+		return (0);
+	}
+
+	if (tq && test_bit(TQF_SUSPENDED, &tq->flags) &&
+	    (sp->flags & SRB_TAPE) == 0) {
+		/* If target suspended put incoming I/O in retry_q. */
+		qla2x00_extend_timeout(sp->cmd, 10);
+		add_to_scsi_retry_queue(ha, sp);
+	} else
+		was_empty = add_to_pending_queue(ha, sp);
+
+	if ((IS_QLA2100(ha) || IS_QLA2200(ha)) && ha->flags.online) {
+		if (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
+			unsigned long flags;
+
+			spin_lock_irqsave(&ha->hardware_lock, flags);	
+			qla2x00_process_response_queue(ha);
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+		}
+	}
+
+	/* We submit to the hardware if:
+	 *
+	 *	1) we're on the cpu the irq's arrive on or
+	 *	2) there are very few io's outstanding.
+	 *
+	 * In all other cases we'll let an irq pick up our IO and submit it
+	 * to the controller to improve affinity.
+	 */
+	if (_smp_processor_id() == ha->last_irq_cpu || was_empty)
+		qla2x00_next(ha);
+
+	spin_lock_irq(ha->host->host_lock);
+
+	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	HZ
+#define ABORT_WAIT_TIME		((10 * HZ) / (ABORT_POLLING_PERIOD))
+
+	int		found = 0;
+	int		done = 0;
+	srb_t		*rp = NULL;
+	struct list_head *list, *temp;
+	u_long		max_wait_time = ABORT_WAIT_TIME;
+
+	do {
+		/* Check on done queue */
+		spin_lock(&ha->list_lock);
+		list_for_each_safe(list, temp, &ha->done_queue) {
+			rp = list_entry(list, srb_t, list);
+
+			/*
+			 * Found command. Just exit and wait for the cmd sent
+			 * to OS.
+			*/
+			if (cmd == rp->cmd) {
+				found++;
+				DEBUG3(printk("%s: found in done queue.\n",
+				    __func__);)
+				break;
+			}
+		}
+		spin_unlock(&ha->list_lock);
+
+		/* Complete the cmd right away. */
+		if (found) { 
+			qla2x00_delete_from_done_queue(ha, rp);
+			sp_put(ha, rp);
+			done++;
+			break;
+		}
+
+		spin_unlock_irq(ha->host->host_lock);
+
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(ABORT_POLLING_PERIOD);
+
+		spin_lock_irq(ha->host->host_lock);
+
+	} while ((max_wait_time--));
+
+	if (done)
+		DEBUG2(printk(KERN_INFO "%s: found cmd=%p.\n", __func__, cmd));
+
+	return (done);
+}
+
+/*
+ * 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
+ */
+static 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) ||
+	    test_bit(CFG_ACTIVE, &ha->cfg_flags) ||
+	    atomic_read(&ha->loop_state) != LOOP_READY) {
+		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:
+**************************************************************************/
+int
+qla2xxx_eh_abort(struct scsi_cmnd *cmd)
+{
+	int		i;
+	int		return_status = FAILED;
+	os_lun_t	*q;
+	scsi_qla_host_t *ha;
+	scsi_qla_host_t *vis_ha;
+	srb_t		*sp;
+	srb_t		*rp;
+	struct list_head *list, *temp;
+	struct Scsi_Host *host;
+	uint8_t		found = 0;
+	unsigned int	b, t, l;
+
+	/* Get the SCSI request ptr */
+	sp = (srb_t *) CMD_SP(cmd);
+
+	/*
+	 * If sp is NULL, command is already returned.
+	 * sp is NULLED just before we call back scsi_done
+	 *
+	 */
+	if ((sp == NULL)) {
+		/* no action - we don't have command */
+		qla_printk(KERN_INFO, to_qla_host(cmd->device->host),
+		    "qla2xxx_eh_abort: cmd already done sp=%p\n", sp);
+		DEBUG(printk("qla2xxx_eh_abort: cmd already done sp=%p\n", sp);)
+		return SUCCESS;
+	}
+	if (sp) {
+		DEBUG(printk("qla2xxx_eh_abort: refcount %i \n",
+		    atomic_read(&sp->ref_count));)
+	}
+
+	vis_ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
+	ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
+
+	host = ha->host;
+
+	/* Generate LU queue on bus, target, LUN */
+	b = cmd->device->channel;
+	t = cmd->device->id;
+	l = cmd->device->lun;
+	q = GET_LU_Q(vis_ha, t, l);
+
+	qla_printk(KERN_INFO, ha, 
+	    "%s scsi(%ld:%d:%d:%d): cmd_timeout_in_sec=0x%x.\n", __func__,
+	    ha->host_no, (int)b, (int)t, (int)l,
+	    cmd->timeout_per_command / HZ);
+
+	/*
+	 * if no LUN queue then something is very wrong!!!
+	 */
+	if (q == NULL) {
+		qla_printk(KERN_WARNING, ha,
+			"qla2x00: (%x:%x:%x) No LUN queue.\n", b, t, l);
+
+		/* no action - we don't have command */
+		return FAILED;
+	}
+
+	DEBUG2(printk("scsi(%ld): ABORTing cmd=%p sp=%p jiffies = 0x%lx, "
+	    "timeout=%x, dpc_flags=%lx, vis_ha->dpc_flags=%lx q->flag=%lx\n",
+	    ha->host_no, cmd, sp, jiffies, cmd->timeout_per_command / HZ,
+	    ha->dpc_flags, vis_ha->dpc_flags, q->q_flag));
+	DEBUG2(qla2x00_print_scsi_cmd(cmd));
+
+	spin_unlock_irq(ha->host->host_lock);
+	if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
+		DEBUG2(printk("%s failed:board disabled\n", __func__);)
+		spin_lock_irq(ha->host->host_lock);
+		return FAILED;
+	}
+	spin_lock_irq(ha->host->host_lock);
+
+	/* Search done queue */
+	spin_lock(&ha->list_lock);
+	list_for_each_safe(list, temp, &ha->done_queue) {
+		rp = list_entry(list, srb_t, list);
+
+		if (cmd != rp->cmd)
+			continue;
+
+		/*
+		 * Found command.Remove it from done list.
+		 * And proceed to post completion to scsi mid layer.
+		 */
+		return_status = SUCCESS;
+		found++;
+		qla2x00_delete_from_done_queue(ha, sp);
+
+		break;
+	} /* list_for_each_safe() */
+	spin_unlock(&ha->list_lock);
+
+	/*
+	 * Return immediately if the aborted command was already in the done
+	 * queue
+	 */
+	if (found) {
+		qla_printk(KERN_INFO, ha,
+		    "qla2xxx_eh_abort: Returning completed command=%p sp=%p\n",
+		    cmd, sp);
+		sp_put(ha, sp);
+		return (return_status);
+	}
+	
+
+	/*
+	 * See if this command is in the retry queue
+	 */
+	DEBUG3(printk("qla2xxx_eh_abort: searching sp %p in retry "
+		    "queue.\n", sp);)
+
+	spin_lock(&ha->list_lock);
+	list_for_each_safe(list, temp, &ha->retry_queue) {
+		rp = list_entry(list, srb_t, list);
+
+		if (cmd != rp->cmd)
+			continue;
+
+
+		DEBUG2(printk("qla2xxx_eh_abort: found "
+		    "in retry queue. SP=%p\n", sp);)
+
+		__del_from_retry_queue(ha, rp);
+		cmd->result = DID_ABORT << 16;
+		__add_to_done_queue(ha, rp);
+
+		return_status = SUCCESS;
+		found++;
+
+		break;
+
+	} 
+	spin_unlock(&ha->list_lock);
+
+
+	/*
+	 * Our SP pointer points at the command we want to remove from the
+	 * pending queue providing we haven't already sent it to the adapter.
+	 */
+	if (!found) {
+		DEBUG3(printk("qla2xxx_eh_abort: searching sp %p "
+		    "in pending queue.\n", sp);)
+
+		spin_lock(&vis_ha->list_lock);
+		list_for_each_safe(list, temp, &vis_ha->pending_queue) {
+			rp = list_entry(list, srb_t, list);
+
+			if (rp->cmd != cmd)
+				continue;
+
+			/* Remove srb from LUN queue. */
+			rp->flags |=  SRB_ABORTED;
+
+			DEBUG2(printk("qla2xxx_eh_abort: Cmd in pending queue."
+			    " serial_number %ld.\n",
+			    sp->cmd->serial_number);)
+
+			__del_from_pending_queue(vis_ha, rp);
+			cmd->result = DID_ABORT << 16;
+
+			__add_to_done_queue(vis_ha, rp);
+
+			return_status = SUCCESS;
+
+			found++;
+			break;
+		} /* list_for_each_safe() */
+		spin_unlock(&vis_ha->list_lock);
+	} /*End of if !found */
+
+	if (!found) {  /* find the command in our active list */
+		DEBUG3(printk("qla2xxx_eh_abort: searching sp %p "
+		    "in outstanding queue.\n", sp);)
+
+		spin_lock(&ha->hardware_lock);
+		for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
+			sp = ha->outstanding_cmds[i];
+
+			if (sp == NULL)
+				continue;
+
+			if (sp->cmd != cmd)
+				continue;
+
+			DEBUG2(printk("qla2xxx_eh_abort(%ld): aborting sp %p "
+			    "from RISC. pid=%ld sp->state=%x q->q_flag=%lx\n",
+			    ha->host_no, sp, sp->cmd->serial_number,
+			    sp->state, q->q_flag);)
+			DEBUG(qla2x00_print_scsi_cmd(cmd);)
+
+			/* Get a reference to the sp and drop the lock.*/
+			sp_get(ha, sp);
+
+			spin_unlock(&ha->hardware_lock);
+			spin_unlock_irq(ha->host->host_lock);
+
+			if (qla2x00_abort_command(ha, sp)) {
+				DEBUG2(printk("qla2xxx_eh_abort: abort_command "
+				    "mbx failed.\n");)
+				return_status = FAILED;
+			} else {
+				DEBUG3(printk("qla2xxx_eh_abort: abort_command "
+				    " mbx success.\n");)
+				return_status = SUCCESS;
+			}
+
+			sp_put(ha,sp);
+
+			spin_lock_irq(ha->host->host_lock);
+			spin_lock(&ha->hardware_lock);
+
+			/*
+			 * Regardless of mailbox command status, go check on
+			 * done queue just in case the sp is already done.
+			 */
+			break;
+
+		}/*End of for loop */
+		spin_unlock(&ha->hardware_lock);
+
+	} /*End of if !found */
+
+	/* Waiting for our command in done_queue to be returned to OS.*/
+	if (qla2x00_eh_wait_on_command(ha, cmd) != 0) {
+		DEBUG2(printk("qla2xxx_eh_abort: cmd returned back to OS.\n");)
+		return_status = SUCCESS;
+	}
+
+	if (return_status == FAILED) {
+		qla_printk(KERN_INFO, ha, 
+			"qla2xxx_eh_abort Exiting: status=Failed\n");
+		return FAILED;
+	}
+
+	DEBUG2(printk("qla2xxx_eh_abort: Exiting. return_status=0x%x.\n",
+	    return_status));
+
+	return return_status;
+}
+
+/**************************************************************************
+* 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;
+
+	status = 0;
+
+	/*
+	 * Waiting for all commands for the designated target in the active
+	 * array
+	 */
+	for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
+		spin_lock(&ha->hardware_lock);
+		sp = ha->outstanding_cmds[cnt];
+		if (sp) {
+			cmd = sp->cmd;
+			spin_unlock(&ha->hardware_lock);
+			if (cmd->device->id == t) {
+				if (!qla2x00_eh_wait_on_command(ha, cmd)) {
+					status = 1;
+					break;
+				}
+			}
+		}
+		else {
+			spin_unlock(&ha->hardware_lock);
+		}
+	}
+	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)
+{
+	int		return_status;
+	unsigned int	b, t, l;
+	scsi_qla_host_t	*ha;
+	os_tgt_t	*tq;
+	os_lun_t	*lq;
+	fc_port_t	*fcport_to_reset;
+	srb_t		*rp;
+	struct list_head *list, *temp;
+
+	return_status = FAILED;
+	if (cmd == NULL) {
+		printk(KERN_INFO
+		    "%s(): **** SCSI mid-layer passing in NULL cmd\n",
+		    __func__);
+
+		return (return_status);
+	}
+
+	b = cmd->device->channel;
+	t = cmd->device->id;
+	l = cmd->device->lun;
+	ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
+
+	tq = TGT_Q(ha, t);
+	if (tq == NULL) {
+		qla_printk(KERN_INFO, ha,
+		    "%s(): **** CMD derives a NULL TGT_Q\n", __func__);
+
+		return (return_status);
+	}
+	lq = (os_lun_t *)LUN_Q(ha, t, l);
+	if (lq == NULL) {
+		printk(KERN_INFO
+		    "%s(): **** CMD derives a NULL LUN_Q\n", __func__);
+
+		return (return_status);
+	}
+	fcport_to_reset = lq->fclun->fcport;
+
+	/* If we are coming in from the back-door, stall I/O until complete. */
+	if (!cmd->device->host->eh_active)
+		set_bit(TQF_SUSPENDED, &tq->flags);
+
+	qla_printk(KERN_INFO, ha,
+	    "scsi(%ld:%d:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, b, t, l);
+
+	DEBUG2(printk(KERN_INFO
+	    "scsi(%ld): DEVICE_RESET cmd=%p jiffies = 0x%lx, timeout=%x, "
+	    "dpc_flags=%lx, status=%x allowed=%d cmd.state=%x\n",
+	    ha->host_no, cmd, jiffies, cmd->timeout_per_command / HZ,
+	    ha->dpc_flags, cmd->result, cmd->allowed, cmd->state));
+
+ 	/* Clear commands from the retry queue. */
+ 	spin_lock(&ha->list_lock);
+ 	list_for_each_safe(list, temp, &ha->retry_queue) {
+ 		rp = list_entry(list, srb_t, list);
+ 
+ 		if (t != rp->cmd->device->id) 
+ 			continue;
+ 
+ 		DEBUG2(printk(KERN_INFO
+		    "qla2xxx_eh_reset: found in retry queue. SP=%p\n", rp));
+ 
+ 		__del_from_retry_queue(ha, rp);
+ 		rp->cmd->result = DID_RESET << 16;
+ 		__add_to_done_queue(ha, rp);
+ 	}
+ 	spin_unlock(&ha->list_lock);
+
+	spin_unlock_irq(ha->host->host_lock);
+
+	if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
+		DEBUG2(printk(KERN_INFO
+		    "%s failed:board disabled\n",__func__));
+
+		spin_lock_irq(ha->host->host_lock);
+		goto eh_dev_reset_done;
+	}
+
+	if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
+		if (qla2x00_device_reset(ha, fcport_to_reset) == 0) {
+			return_status = SUCCESS;
+		}
+
+#if defined(LOGOUT_AFTER_DEVICE_RESET)
+		if (return_status == SUCCESS) {
+			if (fcport_to_reset->flags & FC_FABRIC_DEVICE) {
+				qla2x00_fabric_logout(ha,
+				    fcport_to_reset->loop_id);
+				qla2x00_mark_device_lost(ha, fcport_to_reset);
+			}
+		}
+#endif
+	} else {
+		DEBUG2(printk(KERN_INFO
+		    "%s failed: loop not ready\n",__func__);)
+	}
+
+	spin_lock_irq(ha->host->host_lock);
+
+	if (return_status == 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;
+	}
+
+	/*
+	 * If we are coming down the EH path, wait for all commands to
+	 * complete for the device.
+	 */
+	if (cmd->device->host->eh_active) {
+		if (qla2x00_eh_wait_for_pending_target_commands(ha, t))
+			return_status = FAILED;
+
+		if (return_status == 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__); 
+
+			goto eh_dev_reset_done;
+		}
+	}
+
+	qla_printk(KERN_INFO, ha,
+	    "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
+	    ha->host_no, b, t, l);
+
+eh_dev_reset_done:
+
+	if (!cmd->device->host->eh_active)
+		clear_bit(TQF_SUSPENDED, &tq->flags);
+
+	return (return_status);
+}
+
+/**************************************************************************
+* 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;
+
+	status = 1;
+
+	/*
+	 * Waiting for all commands for the designated target in the active
+	 * array
+	 */
+	for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
+		spin_lock(&ha->hardware_lock);
+		sp = ha->outstanding_cmds[cnt];
+		if (sp) {
+			cmd = sp->cmd;
+			spin_unlock(&ha->hardware_lock);
+			status = qla2x00_eh_wait_on_command(ha, cmd);
+			if (status == 0)
+				break;
+		}
+		else {
+			spin_unlock(&ha->hardware_lock);
+		}
+	}
+	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;
+	srb_t *sp;
+	int rval = FAILED;
+
+	ha = (scsi_qla_host_t *) cmd->device->host->hostdata;
+	sp = (srb_t *) CMD_SP(cmd);
+
+	qla_printk(KERN_INFO, ha,
+	    "scsi(%ld:%d:%d:%d): LOOP RESET ISSUED.\n", ha->host_no,
+	    cmd->device->channel, cmd->device->id, cmd->device->lun);
+
+	spin_unlock_irq(ha->host->host_lock);
+
+	if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
+		DEBUG2(printk("%s failed:board disabled\n",__func__));
+		spin_lock_irq(ha->host->host_lock);
+		return FAILED;
+	}
+
+	if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
+		if (qla2x00_loop_reset(ha) == QLA_SUCCESS) 
+			rval = SUCCESS;
+	}
+
+	spin_lock_irq(ha->host->host_lock);
+	if (rval == FAILED)
+		goto out;
+
+	/* Waiting for our command in done_queue to be returned to OS.*/
+	if (cmd->device->host->eh_active)
+		if (!qla2x00_eh_wait_for_pending_commands(ha))
+			rval = FAILED;
+
+ out:
+	qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
+			(rval == FAILED) ? "failed" : "succeded");
+
+	return rval;
+}
+
+/**************************************************************************
+* 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 = (scsi_qla_host_t *)cmd->device->host->hostdata;
+	int		rval = SUCCESS;
+
+	/* Display which one we're actually resetting for debug. */
+	DEBUG(printk("qla2xxx_eh_host_reset:Resetting scsi(%ld).\n",
+	    ha->host_no));
+
+	/*
+	 *  Now issue reset.
+	 */
+	qla_printk(KERN_INFO, ha,
+	    "scsi(%ld:%d:%d:%d): ADAPTER RESET issued.\n", ha->host_no,
+	    cmd->device->channel, cmd->device->id, cmd->device->lun);
+
+	spin_unlock_irq(ha->host->host_lock);
+
+	if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
+		goto board_disabled;
+
+	/*
+	 * 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.
+	 */
+	/* Blocking call-Does context switching if loop is Not Ready */
+	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 board_disabled;
+	} 
+
+	clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
+
+	spin_lock_irq(ha->host->host_lock);
+	if (rval == FAILED)
+		goto out;
+
+	/* Waiting for our command in done_queue to be returned to OS.*/
+	if (!qla2x00_eh_wait_for_pending_commands(ha))
+		rval = FAILED;
+
+ out:
+	qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
+			(rval == FAILED) ? "failed" : "succeded");
+
+	return rval;
+
+ board_disabled:
+	spin_lock_irq(ha->host->host_lock);
+
+	qla_printk(KERN_INFO, ha, "%s: failed:board disabled\n", __func__);
+	return FAILED;
+}
+
+
+/*
+* 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;
+	uint16_t t;
+	os_tgt_t        *tq;
+
+	if (ha->flags.enable_lip_reset) {
+		status = qla2x00_lip_reset(ha);
+	}
+
+	if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
+		for (t = 0; t < MAX_FIBRE_DEVICES; t++) {
+			if ((tq = TGT_Q(ha, t)) == NULL)
+				continue;
+
+			if (tq->fcport == NULL)
+				continue;
+
+			status = qla2x00_target_reset(ha, 0, t);
+			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 qla2x00_abort_target(reset_fcport);
+}
+
+/**************************************************************************
+* qla2xxx_slave_configure
+*
+* Description:
+**************************************************************************/
+int
+qla2xxx_slave_configure(struct scsi_device *sdev)
+{
+	scsi_qla_host_t *ha = to_qla_host(sdev->host);
+	int queue_depth;
+
+	if (IS_QLA2100(ha) || IS_QLA2200(ha))
+		queue_depth = 16;
+	else
+		queue_depth = 32;
+
+	if (sdev->tagged_supported) {
+		if (ql2xmaxqdepth != 0 && ql2xmaxqdepth <= 0xffffU)
+			queue_depth = ql2xmaxqdepth;
+
+		ql2xmaxqdepth = queue_depth;
+
+		scsi_activate_tcq(sdev, queue_depth);
+
+		qla_printk(KERN_INFO, ha,
+		    "scsi(%d:%d:%d:%d): Enabled tagged queuing, queue "
+		    "depth %d.\n",
+		    sdev->host->host_no, sdev->channel, sdev->id, sdev->lun,
+		    sdev->queue_depth);
+	} else {
+		 scsi_adjust_queue_depth(sdev, 0 /* TCQ off */,
+		     sdev->host->hostt->cmd_per_lun /* 3 */);
+	}
+
+	return (0);
+}
+
+/**
+ * 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 32bit DMA address */
+	ha->flags.enable_64bit_addressing = 0;
+	ha->calc_request_entries = qla2x00_calc_iocbs_32;
+	ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_32;
+
+	/*
+	 * Given the two variants pci_set_dma_mask(), allow the compiler to
+	 * assist in setting the proper dma mask.
+	 */
+	if (sizeof(dma_addr_t) > 4) {
+		if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
+			ha->flags.enable_64bit_addressing = 1;
+			ha->calc_request_entries = qla2x00_calc_iocbs_64;
+			ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_64;
+
+			if (pci_set_consistent_dma_mask(ha->pdev,
+			    DMA_64BIT_MASK)) {
+				qla_printk(KERN_DEBUG, ha, 
+				    "Failed to set 64 bit PCI consistent mask; "
+				    "using 32 bit.\n");
+				pci_set_consistent_dma_mask(ha->pdev,
+				    DMA_32BIT_MASK);
+			}
+		} else {
+			qla_printk(KERN_DEBUG, ha,
+			    "Failed to set 64 bit PCI DMA mask, falling back "
+			    "to 32 bit MASK.\n");
+			pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
+		}
+	} else {
+		pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
+	}
+}
+
+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, ha->brd_info->drv_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);
+}
+
+/*
+ * PCI driver interface
+ */
+int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
+{
+	int	ret;
+	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];
+
+	if (pci_enable_device(pdev))
+		return -1;
+
+	host = scsi_host_alloc(&qla2x00_driver_template,
+	    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;
+	ha->brd_info = brd_info;
+	sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
+
+	/* Configure PCI I/O space */
+	ret = qla2x00_iospace_config(ha);
+	if (ret != 0) {
+		goto probe_failed;
+	}
+
+	/* Sanitize the information from PCI BIOS. */
+	host->irq = pdev->irq;
+
+	qla_printk(KERN_INFO, ha,
+	    "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
+	    host->irq, ha->iobase);
+
+	spin_lock_init(&ha->hardware_lock);
+
+	/* 4.23 Initialize /proc/scsi/qla2x00 counters */
+	ha->actthreads = 0;
+	ha->qthreads   = 0;
+	ha->total_isr_cnt = 0;
+	ha->total_isp_aborts = 0;
+	ha->total_lip_cnt = 0;
+	ha->total_dev_errs = 0;
+	ha->total_ios = 0;
+	ha->total_bytes = 0;
+
+	ha->prev_topology = 0;
+	ha->ports = MAX_BUSES;
+
+	if (IS_QLA2100(ha)) {
+		ha->max_targets = 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;
+	} else if (IS_QLA2200(ha)) {
+		ha->max_targets = 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;
+	} else /*if (IS_QLA2300(ha))*/ {
+		ha->max_targets = 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;
+	}
+	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);
+	INIT_LIST_HEAD(&ha->rscn_fcports);
+	INIT_LIST_HEAD(&ha->done_queue);
+	INIT_LIST_HEAD(&ha->retry_queue);
+	INIT_LIST_HEAD(&ha->scsi_retry_queue);
+	INIT_LIST_HEAD(&ha->pending_queue);
+
+	/*
+	 * 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);
+	spin_lock_init(&ha->list_lock);
+
+	ha->dpc_pid = -1;
+	init_completion(&ha->dpc_inited);
+	init_completion(&ha->dpc_exited);
+
+	qla2x00_config_dma_addressing(ha);
+	if (qla2x00_mem_alloc(ha)) {
+		qla_printk(KERN_WARNING, ha,
+		    "[ERROR] Failed to allocate memory for adapter\n");
+
+		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));
+
+		goto probe_failed;
+	}
+
+	/*
+	 * Startup the kernel thread for this host adapter
+	 */
+	ha->dpc_should_die = 0;
+	ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
+	if (ha->dpc_pid < 0) {
+		qla_printk(KERN_WARNING, ha,
+		    "Unable to start DPC thread!\n");
+
+		goto probe_failed;
+	}
+	wait_for_completion(&ha->dpc_inited);
+
+	host->this_id = 255;
+	host->cmd_per_lun = 3;
+	host->max_cmd_len = MAX_CMDSZ;
+	host->max_channel = ha->ports - 1;
+	host->max_lun = ha->max_luns;
+	BUG_ON(qla2xxx_transport_template == NULL);
+	host->transportt = qla2xxx_transport_template;
+	host->unique_id = ha->instance;
+	host->max_id = ha->max_targets;
+
+	if (IS_QLA2100(ha) || IS_QLA2200(ha))
+		ret = request_irq(host->irq, qla2100_intr_handler,
+		    SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
+	else
+		ret = request_irq(host->irq, qla2300_intr_handler,
+		    SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
+	if (ret != 0) {
+		qla_printk(KERN_WARNING, ha,
+		    "Failed to reserve interrupt %d already in use.\n",
+		    host->irq);
+		goto probe_failed;
+	}
+
+	/* 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));
+
+	reg = ha->iobase;
+
+	/* Disable ISP interrupts. */
+	qla2x00_disable_intrs(ha);
+
+	/* Ensure mailbox registers are free. */
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	WRT_REG_WORD(&reg->semaphore, 0);
+	WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
+	WRT_REG_WORD(&reg->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->hccr, (HCCR_ENABLE_PARITY + 0x1));
+		else
+			/* SRAM, Instruction RAM and GP RAM parity */
+			WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
+	}
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	/* Enable chip interrupts. */
+	qla2x00_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++;
+
+	/* List the target we have found */
+	if (displayConfig) {
+		qla2x00_display_fc_names(ha);
+	}
+
+	if (scsi_add_host(host, &pdev->dev))
+		goto probe_failed;
+
+	sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
+	sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
+
+	qla_printk(KERN_INFO, ha, "\n"
+	    " QLogic Fibre Channel HBA Driver: %s\n"
+	    "  QLogic %s - %s\n"
+	    "  %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
+	    ha->model_number, ha->model_desc ? ha->model_desc: "",
+	    ha->brd_info->isp_name, qla2x00_get_pci_info_str(ha, pci_info),
+	    pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
+	    ha->host_no, qla2x00_get_fw_version_str(ha, fw_str));
+
+	if (ql2xdoinitscan)
+		scsi_scan_host(host);
+
+	return 0;
+
+probe_failed:
+	qla2x00_free_device(ha);
+
+	scsi_host_put(host);
+
+probe_disable_device:
+	pci_disable_device(pdev);
+
+	return -1;
+}
+EXPORT_SYMBOL_GPL(qla2x00_probe_one);
+
+void qla2x00_remove_one(struct pci_dev *pdev)
+{
+	scsi_qla_host_t *ha;
+
+	ha = pci_get_drvdata(pdev);
+
+	sysfs_remove_bin_file(&ha->host->shost_gendev.kobj,
+	    &sysfs_fw_dump_attr);
+	sysfs_remove_bin_file(&ha->host->shost_gendev.kobj, &sysfs_nvram_attr);
+
+	scsi_remove_host(ha->host);
+
+	qla2x00_free_device(ha);
+
+	scsi_host_put(ha->host);
+
+	pci_set_drvdata(pdev, NULL);
+}
+EXPORT_SYMBOL_GPL(qla2x00_remove_one);
+
+static void
+qla2x00_free_device(scsi_qla_host_t *ha)
+{
+	int ret;
+
+	/* Abort any outstanding IO descriptors. */
+	if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
+		qla2x00_cancel_io_descriptors(ha);
+
+	/* turn-off interrupts on the card */
+	if (ha->interrupts_on)
+		qla2x00_disable_intrs(ha);
+
+	/* Disable timer */
+	if (ha->timer_active)
+		qla2x00_stop_timer(ha);
+
+	/* Kill the kernel thread for this host */
+	if (ha->dpc_pid >= 0) {
+		ha->dpc_should_die = 1;
+		wmb();
+		ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
+		if (ret) {
+			qla_printk(KERN_ERR, ha,
+			    "Unable to signal DPC thread -- (%d)\n", ret);
+
+			/* TODO: SOMETHING MORE??? */
+		} else {
+			wait_for_completion(&ha->dpc_exited);
+		}
+	}
+
+	qla2x00_mem_free(ha);
+
+
+	ha->flags.online = 0;
+
+	/* Detach interrupts */
+	if (ha->pdev->irq)
+		free_irq(ha->pdev->irq, ha);
+
+	/* release io space registers  */
+	if (ha->iobase)
+		iounmap(ha->iobase);
+	pci_release_regions(ha->pdev);
+
+	pci_disable_device(ha->pdev);
+}
+
+
+/*
+ * The following support functions are adopted to handle
+ * the re-entrant qla2x00_proc_info correctly.
+ */
+static void
+copy_mem_info(struct info_str *info, char *data, int len)
+{
+	if (info->pos + len > info->offset + info->length)
+		len = info->offset + info->length - info->pos;
+
+	if (info->pos + len < info->offset) {
+		info->pos += len;
+		return;
+	}
+ 
+	if (info->pos < info->offset) {
+		off_t partial;
+ 
+		partial = info->offset - info->pos;
+		data += partial;
+		info->pos += partial;
+		len  -= partial;
+	}
+ 
+	if (len > 0) {
+		memcpy(info->buffer, data, len);
+		info->pos += len;
+		info->buffer += len;
+	}
+}
+
+static int
+copy_info(struct info_str *info, char *fmt, ...)
+{
+	va_list args;
+	char buf[256];
+	int len;
+ 
+	va_start(args, fmt);
+	len = vsprintf(buf, fmt, args);
+	va_end(args);
+ 
+	copy_mem_info(info, buf, len);
+
+	return (len);
+}
+
+/*************************************************************************
+* qla2x00_proc_info
+*
+* Description:
+*   Return information to handle /proc support for the driver.
+*
+* inout : decides the direction of the dataflow and the meaning of the
+*         variables
+* buffer: If inout==0 data is being written to it else read from it
+*         (ptr to a page buffer)
+* *start: If inout==0 start of the valid data in the buffer
+* offset: If inout==0 starting offset from the beginning of all
+*         possible data to return.
+* length: If inout==0 max number of bytes to be written into the buffer
+*         else number of bytes in "buffer"
+* Returns:
+*         < 0:  error. errno value.
+*         >= 0: sizeof data returned.
+*************************************************************************/
+int
+qla2x00_proc_info(struct Scsi_Host *shost, char *buffer,
+    char **start, off_t offset, int length, int inout)
+{
+	struct info_str	info;
+	int             retval = -EINVAL;
+	os_lun_t	*up;
+	os_tgt_t	*tq;
+	unsigned int	t, l;
+	uint32_t        tmp_sn;
+	uint32_t	*flags;
+	uint8_t		*loop_state;
+	scsi_qla_host_t *ha;
+	char fw_info[30];
+ 
+	DEBUG3(printk(KERN_INFO
+	    "Entering proc_info buff_in=%p, offset=0x%lx, length=0x%x\n",
+	    buffer, offset, length);)
+
+	ha = (scsi_qla_host_t *) shost->hostdata;
+
+	if (inout) {
+		/* Has data been written to the file? */
+		DEBUG3(printk(
+		    "%s: has data been written to the file. \n",
+		    __func__);)
+
+		return -ENOSYS;
+	}
+
+	if (start) {
+		*start = buffer;
+	}
+
+	info.buffer = buffer;
+	info.length = length;
+	info.offset = offset;
+	info.pos    = 0;
+
+	/* start building the print buffer */
+	copy_info(&info,
+	    "QLogic PCI to Fibre Channel Host Adapter for %s:\n"
+	    "        Firmware version %s, ",
+	    ha->model_number, qla2x00_get_fw_version_str(ha, fw_info));
+
+	copy_info(&info, "Driver version %s\n", qla2x00_version_str);
+
+	tmp_sn = ((ha->serial0 & 0x1f) << 16) | (ha->serial2 << 8) | 
+	    ha->serial1;
+	copy_info(&info, "ISP: %s, Serial# %c%05d\n",
+	    ha->brd_info->isp_name, ('A' + tmp_sn/100000), (tmp_sn%100000));
+
+	copy_info(&info,
+	    "Request Queue = 0x%llx, Response Queue = 0x%llx\n",
+		(unsigned long long)ha->request_dma,
+		(unsigned long long)ha->response_dma);
+
+	copy_info(&info,
+	    "Request Queue count = %d, Response Queue count = %d\n",
+	    ha->request_q_length, ha->response_q_length);
+
+	copy_info(&info,
+	    "Total number of active commands = %ld\n",
+	    ha->actthreads);
+
+	copy_info(&info,
+	    "Total number of interrupts = %ld\n",
+	    (long)ha->total_isr_cnt);
+
+	copy_info(&info,
+	    "    Device queue depth = 0x%x\n",
+	    (ql2xmaxqdepth == 0) ? 16 : ql2xmaxqdepth);
+
+	copy_info(&info,
+	    "Number of free request entries = %d\n", ha->req_q_cnt);
+
+	copy_info(&info,
+	    "Number of mailbox timeouts = %ld\n", ha->total_mbx_timeout);
+
+	copy_info(&info,
+	    "Number of ISP aborts = %ld\n", ha->total_isp_aborts);
+
+	copy_info(&info,
+	    "Number of loop resyncs = %ld\n", ha->total_loop_resync);
+
+	copy_info(&info,
+	    "Number of retries for empty slots = %ld\n",
+	    qla2x00_stats.outarray_full);
+
+	copy_info(&info,
+	    "Number of reqs in pending_q= %ld, retry_q= %d, "
+	    "done_q= %ld, scsi_retry_q= %d\n",
+	    ha->qthreads, ha->retry_q_cnt,
+	    ha->done_q_cnt, ha->scsi_retry_q_cnt);
+
+
+	flags = (uint32_t *) &ha->flags;
+
+	if (atomic_read(&ha->loop_state) == LOOP_DOWN) {
+		loop_state = "DOWN";
+	} else if (atomic_read(&ha->loop_state) == LOOP_UP) {
+		loop_state = "UP";
+	} else if (atomic_read(&ha->loop_state) == LOOP_READY) {
+		loop_state = "READY";
+	} else if (atomic_read(&ha->loop_state) == LOOP_TIMEOUT) {
+		loop_state = "TIMEOUT";
+	} else if (atomic_read(&ha->loop_state) == LOOP_UPDATE) {
+		loop_state = "UPDATE";
+	} else {
+		loop_state = "UNKNOWN";
+	}
+
+	copy_info(&info, 
+	    "Host adapter:loop state = <%s>, flags = 0x%lx\n",
+	    loop_state , *flags);
+
+	copy_info(&info, "Dpc flags = 0x%lx\n", ha->dpc_flags);
+
+	copy_info(&info, "MBX flags = 0x%x\n", ha->mbx_flags);
+
+	copy_info(&info, "Link down Timeout = %3.3d\n",
+	    ha->link_down_timeout);
+
+	copy_info(&info, "Port down retry = %3.3d\n",
+	    ha->port_down_retry_count);
+
+	copy_info(&info, "Login retry count = %3.3d\n",
+	    ha->login_retry_count);
+
+	copy_info(&info,
+	    "Commands retried with dropped frame(s) = %d\n",
+	    ha->dropped_frame_error_cnt);
+
+	copy_info(&info,
+	    "Product ID = %04x %04x %04x %04x\n", ha->product_id[0],
+	    ha->product_id[1], ha->product_id[2], ha->product_id[3]);
+
+	copy_info(&info, "\n");
+
+	/* 2.25 node/port display to proc */
+	/* Display the node name for adapter */
+	copy_info(&info, "\nSCSI Device Information:\n");
+	copy_info(&info,
+	    "scsi-qla%d-adapter-node="
+	    "%02x%02x%02x%02x%02x%02x%02x%02x;\n",
+	    (int)ha->instance,
+	    ha->init_cb->node_name[0],
+	    ha->init_cb->node_name[1],
+	    ha->init_cb->node_name[2],
+	    ha->init_cb->node_name[3],
+	    ha->init_cb->node_name[4],
+	    ha->init_cb->node_name[5],
+	    ha->init_cb->node_name[6],
+	    ha->init_cb->node_name[7]);
+
+	/* display the port name for adapter */
+	copy_info(&info,
+	    "scsi-qla%d-adapter-port="
+	    "%02x%02x%02x%02x%02x%02x%02x%02x;\n",
+	    (int)ha->instance,
+	    ha->init_cb->port_name[0],
+	    ha->init_cb->port_name[1],
+	    ha->init_cb->port_name[2],
+	    ha->init_cb->port_name[3],
+	    ha->init_cb->port_name[4],
+	    ha->init_cb->port_name[5],
+	    ha->init_cb->port_name[6],
+	    ha->init_cb->port_name[7]);
+
+	/* Print out device port names */
+	for (t = 0; t < MAX_FIBRE_DEVICES; t++) {
+		if ((tq = TGT_Q(ha, t)) == NULL)
+			continue;
+
+		copy_info(&info,
+		    "scsi-qla%d-target-%d="
+		    "%02x%02x%02x%02x%02x%02x%02x%02x;\n",
+		    (int)ha->instance, t,
+		    tq->port_name[0], tq->port_name[1],
+		    tq->port_name[2], tq->port_name[3],
+		    tq->port_name[4], tq->port_name[5],
+		    tq->port_name[6], tq->port_name[7]);
+	}
+
+	copy_info(&info, "\nSCSI LUN Information:\n");
+	copy_info(&info,
+	    "(Id:Lun)  * - indicates lun is not registered with the OS.\n");
+
+	/* scan for all equipment stats */
+	for (t = 0; t < MAX_FIBRE_DEVICES; t++) {
+		/* scan all luns */
+		for (l = 0; l < ha->max_luns; l++) {
+			up = (os_lun_t *) GET_LU_Q(ha, t, l);
+
+			if (up == NULL) {
+				continue;
+			}
+			if (up->fclun == NULL) {
+				continue;
+			}
+
+			copy_info(&info,
+			    "(%2d:%2d): Total reqs %ld,",
+			    t,l,up->io_cnt);
+
+			copy_info(&info,
+			    " Pending reqs %ld,",
+			    up->out_cnt);
+
+			if (up->io_cnt < 4) {
+				copy_info(&info,
+				    " flags 0x%x*,",
+				    (int)up->q_flag);
+			} else {
+				copy_info(&info,
+				    " flags 0x%x,",
+				    (int)up->q_flag);
+			}
+
+			copy_info(&info, 
+			    " %ld:%d:%02x %02x",
+			    up->fclun->fcport->ha->instance,
+			    up->fclun->fcport->cur_path,
+			    up->fclun->fcport->loop_id,
+			    up->fclun->device_type);
+
+			copy_info(&info, "\n");
+
+			if (info.pos >= info.offset + info.length) {
+				/* No need to continue */
+				goto profile_stop;
+			}
+		}
+
+		if (info.pos >= info.offset + info.length) {
+			/* No need to continue */
+			break;
+		}
+	}
+
+profile_stop:
+
+	retval = info.pos > info.offset ? info.pos - info.offset : 0;
+
+	DEBUG3(printk(KERN_INFO 
+	    "Exiting proc_info: info.pos=%d, offset=0x%lx, "
+	    "length=0x%x\n", info.pos, offset, length);)
+
+	return (retval);
+}
+
+/*
+* qla2x00_display_fc_names
+*      This routine will the node names of the different devices found
+*      after port inquiry.
+*
+* Input:
+*      cmd = SCSI command structure
+*
+* Returns:
+*      None.
+*/
+static void
+qla2x00_display_fc_names(scsi_qla_host_t *ha) 
+{
+	uint16_t	tgt;
+	os_tgt_t	*tq;
+
+	/* Display the node name for adapter */
+	qla_printk(KERN_INFO, ha,
+	    "scsi-qla%d-adapter-node=%02x%02x%02x%02x%02x%02x%02x%02x\\;\n",
+	    (int)ha->instance,
+	    ha->init_cb->node_name[0],
+	    ha->init_cb->node_name[1],
+	    ha->init_cb->node_name[2],
+	    ha->init_cb->node_name[3],
+	    ha->init_cb->node_name[4],
+	    ha->init_cb->node_name[5],
+	    ha->init_cb->node_name[6],
+	    ha->init_cb->node_name[7]);
+
+	/* display the port name for adapter */
+	qla_printk(KERN_INFO, ha,
+	    "scsi-qla%d-adapter-port=%02x%02x%02x%02x%02x%02x%02x%02x\\;\n",
+	    (int)ha->instance,
+	    ha->init_cb->port_name[0],
+	    ha->init_cb->port_name[1],
+	    ha->init_cb->port_name[2],
+	    ha->init_cb->port_name[3],
+	    ha->init_cb->port_name[4],
+	    ha->init_cb->port_name[5],
+	    ha->init_cb->port_name[6],
+	    ha->init_cb->port_name[7]);
+
+	/* Print out device port names */
+	for (tgt = 0; tgt < MAX_TARGETS; tgt++) {
+		if ((tq = ha->otgt[tgt]) == NULL)
+			continue;
+
+		if (tq->fcport == NULL)
+			continue;
+
+		switch (ha->binding_type) {
+			case BIND_BY_PORT_NAME:
+				qla_printk(KERN_INFO, ha,
+				    "scsi-qla%d-tgt-%d-di-0-port="
+				    "%02x%02x%02x%02x%02x%02x%02x%02x\\;\n",
+				    (int)ha->instance, 
+				    tgt,
+				    tq->port_name[0], 
+				    tq->port_name[1],
+				    tq->port_name[2], 
+				    tq->port_name[3],
+				    tq->port_name[4], 
+				    tq->port_name[5],
+				    tq->port_name[6], 
+				    tq->port_name[7]);
+
+				break;
+
+			case BIND_BY_PORT_ID:
+				qla_printk(KERN_INFO, ha,
+				    "scsi-qla%d-tgt-%d-di-0-pid="
+				    "%02x%02x%02x\\;\n",
+				    (int)ha->instance,
+				    tgt,
+				    tq->d_id.b.domain,
+				    tq->d_id.b.area,
+				    tq->d_id.b.al_pa);
+				break;
+		}
+
+#if VSA
+		qla_printk(KERN_INFO, ha,
+		    "scsi-qla%d-target-%d-vsa=01;\n", (int)ha->instance, tgt);
+#endif
+	}
+}
+
+/*
+ *  qla2x00_suspend_lun
+ *	Suspend lun and start port down timer
+ *
+ * Input:
+ *	ha = visable adapter block pointer.
+ *  lq = lun queue
+ *  cp = Scsi command pointer 
+ *  time = time in seconds
+ *  count = number of times to let time expire
+ *  delay_lun = non-zero, if lun should be delayed rather than suspended
+ *
+ * Return:
+ *     QLA_SUCCESS  -- suspended lun 
+ *     QLA_FUNCTION_FAILED  -- Didn't suspend lun
+ *
+ * Context:
+ *	Interrupt context.
+ */
+int
+__qla2x00_suspend_lun(scsi_qla_host_t *ha,
+		os_lun_t *lq, int time, int count, int delay_lun)
+{
+	int	rval;
+	srb_t *sp;
+	struct list_head *list, *temp;
+	unsigned long flags;
+
+	rval = QLA_SUCCESS;
+
+	/* if the lun_q is already suspended then don't do it again */
+	if (lq->q_state == LUN_STATE_READY ||lq->q_state == LUN_STATE_RUN) {
+
+		spin_lock_irqsave(&lq->q_lock, flags);
+		if (lq->q_state == LUN_STATE_READY) {
+			lq->q_max = count;
+			lq->q_count = 0;
+		}
+		/* Set the suspend time usually 6 secs */
+		atomic_set(&lq->q_timer, time);
+
+		/* now suspend the lun */
+		lq->q_state = LUN_STATE_WAIT;
+
+		if (delay_lun) {
+			set_bit(LUN_EXEC_DELAYED, &lq->q_flag);
+			DEBUG(printk(KERN_INFO
+			    "scsi(%ld): Delay lun execution for %d secs, "
+			    "count=%d, max count=%d, state=%d\n",
+			    ha->host_no,
+			    time,
+			    lq->q_count, lq->q_max, lq->q_state));
+		} else {
+			DEBUG(printk(KERN_INFO
+			    "scsi(%ld): Suspend lun for %d secs, count=%d, "
+			    "max count=%d, state=%d\n",
+			    ha->host_no,
+			    time,
+			    lq->q_count, lq->q_max, lq->q_state));
+		}
+		spin_unlock_irqrestore(&lq->q_lock, flags);
+
+		/*
+		 * Remove all pending commands from request queue and  put them
+		 * in the scsi_retry queue.
+		 */
+		spin_lock_irqsave(&ha->list_lock, flags);
+		list_for_each_safe(list, temp, &ha->pending_queue) {
+			sp = list_entry(list, srb_t, list);
+			if (sp->lun_queue != lq)
+				continue;
+
+			__del_from_pending_queue(ha, sp);
+
+			if (sp->cmd->allowed < count)
+				sp->cmd->allowed = count;
+			__add_to_scsi_retry_queue(ha, sp);
+
+		} /* list_for_each_safe */
+		spin_unlock_irqrestore(&ha->list_lock, flags);
+		rval = QLA_SUCCESS;
+	} else {
+		rval = QLA_FUNCTION_FAILED;
+	}
+
+	return (rval);
+}
+
+/*
+ * 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)
+{
+	/* 
+	 * 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) 
+{
+	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;
+
+		atomic_set(&fcport->state, FCS_DEVICE_LOST);
+	}
+}
+
+/*
+* 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;
+		}
+
+		ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
+		    sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
+		if (ha->rlc_rsp == NULL) {
+			qla_printk(KERN_WARNING, ha,
+				"Memory Allocation failed - rlc");
+
+			qla2x00_mem_free(ha);
+			msleep(100);
+
+			continue;
+		}
+
+		snprintf(name, sizeof(name), "qla2xxx_%ld", 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, sizeof(init_cb_t));
+
+		/* Get consistent memory allocated for Get Port Database cmd */
+		ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
+		    &ha->iodesc_pd_dma);
+		if (ha->iodesc_pd == NULL) {
+			/* error */
+			qla_printk(KERN_WARNING, ha,
+			    "Memory Allocation failed - iodesc_pd\n");
+
+			qla2x00_mem_free(ha);
+			msleep(100);
+
+			continue;
+		}
+		memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
+
+		/* Allocate ioctl related memory. */
+		if (qla2x00_alloc_ioctl_mem(ha)) {
+			qla_printk(KERN_WARNING, ha,
+			    "Memory Allocation failed - ioctl_mem\n");
+
+			qla2x00_mem_free(ha);
+			msleep(100);
+
+			continue;
+		}
+
+		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));
+		}
+
+		/* 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)
+{
+	uint32_t	t;
+	struct list_head	*fcpl, *fcptemp;
+	fc_port_t	*fcport;
+	struct list_head	*fcll, *fcltemp;
+	fc_lun_t	*fclun;
+	unsigned long	wtime;/* max wait time if mbx cmd is busy. */
+
+	if (ha == NULL) {
+		/* error */
+		DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
+		return;
+	}
+
+	/* Free the target queues */
+	for (t = 0; t < MAX_TARGETS; t++) {
+		qla2x00_tgt_free(ha, t);
+	}
+
+	/* Make sure all other threads are stopped. */
+	wtime = 60 * HZ;
+	while (ha->dpc_wait && wtime) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		wtime = schedule_timeout(wtime);
+	}
+
+	/* free ioctl memory */
+	qla2x00_free_ioctl_mem(ha);
+
+	/* free sp pool */
+	qla2x00_free_sp_pool(ha);
+
+	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->ms_iocb)
+		dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
+
+	if (ha->iodesc_pd)
+		dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_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->rlc_rsp)
+		dma_free_coherent(&ha->pdev->dev,
+		    sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
+		    ha->rlc_rsp_dma);
+
+	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->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->iodesc_pd = NULL;
+	ha->iodesc_pd_dma = 0;
+	ha->init_cb = NULL;
+	ha->init_cb_dma = 0;
+
+	ha->s_dma_pool = NULL;
+
+	ha->rlc_rsp = NULL;
+	ha->rlc_rsp_dma = 0;
+	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 luns */
+		list_for_each_safe(fcll, fcltemp, &fcport->fcluns) {
+			fclun = list_entry(fcll, fc_lun_t, list);
+
+			list_del_init(&fclun->list);
+			kfree(fclun);
+		}
+
+		/* fc ports */
+		list_del_init(&fcport->list);
+		kfree(fcport);
+	}
+	INIT_LIST_HEAD(&ha->fcports);
+
+	if (ha->fw_dump)
+		free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
+
+	if (ha->fw_dump_buffer)
+		vfree(ha->fw_dump_buffer);
+
+	ha->fw_dump = NULL;
+	ha->fw_dump_reading = 0;
+	ha->fw_dump_buffer = NULL;
+}
+
+/*
+ * 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.
+ * 
+ * Note: Sets the ref_count for non Null sp to one.
+ */
+static int
+qla2x00_allocate_sp_pool(scsi_qla_host_t *ha) 
+{
+	int      rval;
+
+	rval = QLA_SUCCESS;
+	ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
+	    mempool_free_slab, 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)
+{
+	DECLARE_MUTEX_LOCKED(sem);
+	scsi_qla_host_t *ha;
+	fc_port_t	*fcport;
+	os_lun_t        *q;
+	srb_t           *sp;
+	uint8_t		status;
+	unsigned long	flags = 0;
+	struct list_head *list, *templist;
+	int	dead_cnt, online_cnt;
+	int	retry_cmds = 0;
+	uint16_t	next_loopid;
+	int t;
+	os_tgt_t *tq;
+
+	ha = (scsi_qla_host_t *)data;
+
+	lock_kernel();
+
+	daemonize("%s_dpc", ha->host_str);
+	allow_signal(SIGHUP);
+
+	ha->dpc_wait = &sem;
+
+	set_user_nice(current, -20);
+
+	unlock_kernel();
+
+	complete(&ha->dpc_inited);
+
+	while (1) {
+		DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
+
+		if (down_interruptible(&sem))
+			break;
+
+		if (ha->dpc_should_die)
+			break;
+
+		DEBUG3(printk("qla2x00: DPC handler waking up\n"));
+
+		/* Initialization not yet finished. Don't do anything yet. */
+		if (!ha->flags.init_done || ha->dpc_active)
+			continue;
+
+		DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
+
+		ha->dpc_active = 1;
+
+		if (!list_empty(&ha->done_queue))
+			qla2x00_done(ha);
+
+		/* Process commands in retry queue */
+		if (test_and_clear_bit(PORT_RESTART_NEEDED, &ha->dpc_flags)) {
+			DEBUG(printk("scsi(%ld): DPC checking retry_q. "
+			    "total=%d\n",
+			    ha->host_no, ha->retry_q_cnt));
+
+			spin_lock_irqsave(&ha->list_lock, flags);
+			dead_cnt = online_cnt = 0;
+			list_for_each_safe(list, templist, &ha->retry_queue) {
+				sp = list_entry(list, srb_t, list);
+				q = sp->lun_queue;
+				DEBUG3(printk("scsi(%ld): pid=%ld sp=%p, "
+				    "spflags=0x%x, q_flag= 0x%lx\n",
+				    ha->host_no, sp->cmd->serial_number, sp,
+				    sp->flags, q->q_flag));
+
+				if (q == NULL)
+					continue;
+				fcport = q->fclun->fcport;
+
+				if (atomic_read(&fcport->state) ==
+				    FCS_DEVICE_DEAD ||
+				    atomic_read(&fcport->ha->loop_state) == LOOP_DEAD) {
+
+					__del_from_retry_queue(ha, sp);
+					sp->cmd->result = DID_NO_CONNECT << 16;
+					if (atomic_read(&fcport->ha->loop_state) ==
+					    LOOP_DOWN) 
+						sp->err_id = SRB_ERR_LOOP;
+					else
+						sp->err_id = SRB_ERR_PORT;
+					sp->cmd->host_scribble =
+					    (unsigned char *) NULL;
+					__add_to_done_queue(ha, sp);
+					dead_cnt++;
+				} else if (atomic_read(&fcport->state) !=
+				    FCS_DEVICE_LOST) {
+
+					__del_from_retry_queue(ha, sp);
+					sp->cmd->result = DID_BUS_BUSY << 16;
+					sp->cmd->host_scribble =
+					    (unsigned char *) NULL;
+					__add_to_done_queue(ha, sp);
+					online_cnt++;
+				}
+			} /* list_for_each_safe() */
+			spin_unlock_irqrestore(&ha->list_lock, flags);
+
+			DEBUG(printk("scsi(%ld): done processing retry queue "
+			    "- dead=%d, online=%d\n ",
+			    ha->host_no, dead_cnt, online_cnt));
+		}
+
+		/* Process commands in scsi retry queue */
+		if (test_and_clear_bit(SCSI_RESTART_NEEDED, &ha->dpc_flags)) {
+			/*
+			 * Any requests we want to delay for some period is put
+			 * in the scsi retry queue with a delay added. The
+			 * timer will schedule a "scsi_restart_needed" every 
+			 * second as long as there are requests in the scsi
+			 * queue. 
+			 */
+			DEBUG(printk("scsi(%ld): DPC checking scsi "
+			    "retry_q.total=%d\n",
+			    ha->host_no, ha->scsi_retry_q_cnt));
+
+			online_cnt = 0;
+			spin_lock_irqsave(&ha->list_lock, flags);
+			list_for_each_safe(list, templist,
+			    &ha->scsi_retry_queue) {
+
+				sp = list_entry(list, srb_t, list);
+				q = sp->lun_queue;
+				tq = sp->tgt_queue;
+
+				DEBUG3(printk("scsi(%ld): scsi_retry_q: "
+				    "pid=%ld sp=%p, spflags=0x%x, "
+				    "q_flag= 0x%lx,q_state=%d\n",
+				    ha->host_no, sp->cmd->serial_number,
+				    sp, sp->flags, q->q_flag, q->q_state));
+
+				/* Was this lun suspended */
+				if (q->q_state != LUN_STATE_WAIT) {
+					online_cnt++;
+					__del_from_scsi_retry_queue(ha, sp);
+
+					if (test_bit(TQF_RETRY_CMDS,
+					    &tq->flags)) {
+						qla2x00_extend_timeout(sp->cmd,
+						    (sp->cmd->timeout_per_command / HZ) - QLA_CMD_TIMER_DELTA);
+						__add_to_pending_queue(ha, sp);
+						retry_cmds++;
+					} else
+						__add_to_retry_queue(ha, sp);
+				}
+
+				/* Was this command suspended for N secs */
+				if (sp->delay != 0) {
+					sp->delay--;
+					if (sp->delay == 0) {
+						online_cnt++;
+						__del_from_scsi_retry_queue(
+						    ha, sp);
+						__add_to_retry_queue(ha,sp);
+					}
+				}
+			}
+			spin_unlock_irqrestore(&ha->list_lock, flags);
+
+			/* Clear all Target Unsuspended bits */
+			for (t = 0; t < ha->max_targets; t++) {
+				if ((tq = ha->otgt[t]) == NULL)
+					continue;
+
+				if (test_bit(TQF_RETRY_CMDS, &tq->flags))
+					clear_bit(TQF_RETRY_CMDS, &tq->flags);
+			}
+			if (retry_cmds)
+				qla2x00_next(ha);
+
+			DEBUG(if (online_cnt > 0))
+			DEBUG(printk("scsi(%ld): dpc() found scsi reqs to "
+			    "restart= %d\n",
+			    ha->host_no, online_cnt));
+		}
+
+		if (ha->flags.mbox_busy) {
+			if (!list_empty(&ha->done_queue))
+				qla2x00_done(ha);
+
+			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(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 (fcport->port_type != FCT_TARGET)
+					continue;
+
+				/*
+				 * 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)
+							qla2x00_fabric_logout(
+							    ha,
+							    fcport->loop_id);
+						status = qla2x00_fabric_login(
+						    ha, fcport, &next_loopid);
+					} else
+						status =
+						    qla2x00_local_device_login(
+							ha, fcport->loop_id);
+
+					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));
+						
+						fcport->port_login_retry_count =
+						    ha->port_down_retry_count * PORT_RETRY_TIME;
+						atomic_set(&fcport->state, FCS_ONLINE);
+						atomic_set(&fcport->port_down_timer,
+						    ha->port_down_retry_count * PORT_RETRY_TIME);
+
+						fcport->login_retry = 0;
+					} 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_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags)) {
+			DEBUG(printk("scsi(%ld): qla2x00_restart_queues()\n",
+			    ha->host_no));
+
+			qla2x00_restart_queues(ha, 0);
+
+			DEBUG(printk("scsi(%ld): qla2x00_restart_queues - end\n",
+			    ha->host_no));
+		}
+
+		if (test_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags)) {
+
+			DEBUG(printk("scsi(%ld): qla2x00_abort_queues()\n",
+			    ha->host_no));
+				
+			qla2x00_abort_queues(ha, 0);
+
+			DEBUG(printk("scsi(%ld): qla2x00_abort_queues - 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)
+			qla2x00_enable_intrs(ha);
+
+		if (!list_empty(&ha->done_queue))
+			qla2x00_done(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_wait = NULL;
+	ha->dpc_active = 0;
+
+	complete_and_exit(&ha->dpc_exited, 0);
+}
+
+/*
+ *  qla2x00_abort_queues
+ *	Abort all commands on queues on device
+ *
+ * Input:
+ *	ha = adapter block pointer.
+ *
+ * Context:
+ *	Interrupt context.
+ */
+void
+qla2x00_abort_queues(scsi_qla_host_t *ha, uint8_t doneqflg) 
+{
+
+	srb_t       *sp;
+	struct list_head *list, *temp;
+	unsigned long flags;
+
+	clear_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
+
+	/* Return all commands device queues. */
+	spin_lock_irqsave(&ha->list_lock,flags);
+	list_for_each_safe(list, temp, &ha->pending_queue) {
+		sp = list_entry(list, srb_t, list);
+
+		if (sp->flags & SRB_ABORTED)
+			continue;
+
+		/* Remove srb from LUN queue. */
+		__del_from_pending_queue(ha, sp);
+
+		/* Set ending status. */
+		sp->cmd->result = DID_BUS_BUSY << 16;
+
+		__add_to_done_queue(ha, sp);
+	}
+	spin_unlock_irqrestore(&ha->list_lock, flags);
+}
+
+/*
+*  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)));
+	}
+}
+
+
+/*
+ * This routine will allocate SP from the free queue
+ * input:
+ *        scsi_qla_host_t *
+ * output:
+ *        srb_t * or NULL
+ */
+static srb_t *
+qla2x00_get_new_sp(scsi_qla_host_t *ha)
+{
+	srb_t *sp;
+
+	sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
+	if (sp)
+		atomic_set(&sp->ref_count, 1);
+	return (sp);
+}
+
+/**************************************************************************
+*   qla2x00_timer
+*
+* Description:
+*   One second timer
+*
+* Context: Interrupt
+***************************************************************************/
+static void
+qla2x00_timer(scsi_qla_host_t *ha)
+{
+	int		t,l;
+	unsigned long	cpu_flags = 0;
+	fc_port_t	*fcport;
+	os_lun_t *lq;
+	os_tgt_t *tq;
+	int		start_dpc = 0;
+	int		index;
+	srb_t		*sp;
+
+	/*
+	 * We try and restart any request in the retry queue every second.
+	 */
+	if (!list_empty(&ha->retry_queue)) {
+		set_bit(PORT_RESTART_NEEDED, &ha->dpc_flags);
+		start_dpc++;
+	}
+
+	/*
+	 * We try and restart any request in the scsi_retry queue every second.
+	 */
+	if (!list_empty(&ha->scsi_retry_queue)) {
+		set_bit(SCSI_RESTART_NEEDED, &ha->dpc_flags);
+		start_dpc++;
+	}
+
+	/*
+	 * 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 remainning\n",
+			    ha->host_no,
+			    t, atomic_read(&fcport->port_down_timer)));
+		}
+		t++;
+	} /* End of for fcport  */
+
+	/*
+	 * LUNS - lun suspend timer.
+	 *
+	 * Whenever, a lun is suspended the timer starts decrementing its
+	 * suspend timer every second until it reaches zero. Once  it reaches
+	 * zero the lun retry count is decremented. 
+	 */
+
+	/*
+	 * FIXME(dg) - Need to convert this linear search of luns into a search
+	 * of a list of suspended luns.
+	 */
+	for (t = 0; t < ha->max_targets; t++) {
+		if ((tq = ha->otgt[t]) == NULL)
+			continue;
+
+		for (l = 0; l < ha->max_luns; l++) {
+			if ((lq = (os_lun_t *) tq->olun[l]) == NULL)
+				continue;
+
+			spin_lock_irqsave(&lq->q_lock, cpu_flags);
+			if (lq->q_state == LUN_STATE_WAIT &&
+				atomic_read(&lq->q_timer) != 0) {
+
+				if (atomic_dec_and_test(&lq->q_timer) != 0) {
+					/*
+					 * A delay should immediately
+					 * transition to a READY state
+					 */
+					if (test_and_clear_bit(LUN_EXEC_DELAYED,
+					    &lq->q_flag)) {
+						lq->q_state = LUN_STATE_READY;
+					}
+					else {
+						lq->q_count++;
+						if (lq->q_count == lq->q_max)
+							lq->q_state =
+							    LUN_STATE_TIMEOUT;
+						else
+							lq->q_state =
+							    LUN_STATE_RUN;
+					}
+				}
+				DEBUG3(printk("scsi(%ld): lun%d - timer %d, "
+				    "count=%d, max=%d, state=%d\n",
+				    ha->host_no,
+				    l,
+				    atomic_read(&lq->q_timer),
+				    lq->q_count, lq->q_max, lq->q_state));
+			}
+			spin_unlock_irqrestore(&lq->q_lock, cpu_flags);
+		} /* End of for luns  */
+	} /* End of for targets  */
+
+	/* 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++) {
+				sp = ha->outstanding_cmds[index];
+				if (!sp)
+					continue;
+				if (!(sp->fclun->fcport->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 remainning %d\n",
+		    ha->host_no,
+		    atomic_read(&ha->loop_down_timer)));
+	}
+
+	/*
+	 * Done Q Handler -- dgFIXME This handler will kick off doneq if we
+	 * haven't process it in 2 seconds.
+	 */
+	if (!list_empty(&ha->done_queue))
+		qla2x00_done(ha);
+
+
+	/* Schedule the DPC routine if needed */
+	if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
+	    test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
+	    start_dpc ||
+	    test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
+	    test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
+	    ha->dpc_wait && !ha->dpc_active) {
+
+		up(ha->dpc_wait);
+	}
+
+	qla2x00_restart_timer(ha, WATCH_INTERVAL);
+}
+
+/*
+ * qla2x00_extend_timeout
+ *      This routine will extend the timeout to the specified value.
+ *
+ * Input:
+ *      cmd = SCSI command structure
+ *
+ * Returns:
+ *      None.
+ */
+void 
+qla2x00_extend_timeout(struct scsi_cmnd *cmd, int timeout) 
+{
+	srb_t *sp = (srb_t *) CMD_SP(cmd);
+	u_long our_jiffies = (timeout * HZ) + jiffies;
+
+    	sp->ext_history= 0; 
+	sp->e_start = jiffies;
+	if (cmd->eh_timeout.function) {
+		mod_timer(&cmd->eh_timeout,our_jiffies);
+		sp->ext_history |= 1;
+	}
+	if (sp->timer.function != NULL) {
+		/* 
+		 * Our internal timer should timeout before the midlayer has a
+		 * chance begin the abort process
+		 */
+		mod_timer(&sp->timer,our_jiffies - (QLA_CMD_TIMER_DELTA * HZ));
+
+    	 	sp->ext_history |= 2;
+	}
+}
+
+/**************************************************************************
+*   qla2x00_cmd_timeout
+*
+* Description:
+*       Handles the command if it times out in any state.
+*
+* Input:
+*     sp - pointer to validate
+*
+* Returns:
+* None.
+* Note:Need to add the support for if( sp->state == SRB_FAILOVER_STATE).
+**************************************************************************/
+void
+qla2x00_cmd_timeout(srb_t *sp)
+{
+	int t, l;
+	int processed;
+	scsi_qla_host_t *vis_ha, *dest_ha;
+	struct scsi_cmnd *cmd;
+	unsigned long flags, cpu_flags;
+	fc_port_t *fcport;
+
+	cmd = sp->cmd;
+	vis_ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
+
+	DEBUG3(printk("cmd_timeout: Entering sp->state = %x\n", sp->state));
+
+	t = cmd->device->id;
+	l = cmd->device->lun;
+	fcport = sp->fclun->fcport;
+	dest_ha = sp->ha;
+
+	/*
+	 * If IO is found either in retry Queue 
+	 *    OR in Lun Queue
+	 * Return this IO back to host
+	 */
+	spin_lock_irqsave(&vis_ha->list_lock, flags);
+	processed = 0;
+	if (sp->state == SRB_PENDING_STATE) {
+		__del_from_pending_queue(vis_ha, sp);
+		DEBUG2(printk("scsi(%ld): Found in Pending queue pid %ld, "
+		    "State = %x., fcport state=%d sjiffs=%lx njiffs=%lx\n",
+		    vis_ha->host_no, cmd->serial_number, sp->state,
+		    atomic_read(&fcport->state), sp->r_start, jiffies));
+
+		/*
+		 * If FC_DEVICE is marked as dead return the cmd with
+		 * DID_NO_CONNECT status.  Otherwise set the host_byte to
+		 * DID_BUS_BUSY to let the OS  retry this cmd.
+		 */
+		if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
+		    atomic_read(&fcport->ha->loop_state) == LOOP_DEAD) {
+			cmd->result = DID_NO_CONNECT << 16;
+			if (atomic_read(&fcport->ha->loop_state) == LOOP_DOWN) 
+				sp->err_id = SRB_ERR_LOOP;
+			else
+				sp->err_id = SRB_ERR_PORT;
+		} else {
+			cmd->result = DID_BUS_BUSY << 16;
+		}
+		__add_to_done_queue(vis_ha, sp);
+		processed++;
+	} 
+	spin_unlock_irqrestore(&vis_ha->list_lock, flags);
+
+	if (processed) {
+		qla2x00_done(vis_ha);
+		return;
+	}
+
+	spin_lock_irqsave(&dest_ha->list_lock, flags);
+	if ((sp->state == SRB_RETRY_STATE) ||
+	    (sp->state == SRB_SCSI_RETRY_STATE)) {
+
+		DEBUG2(printk("scsi(%ld): Found in (Scsi) Retry queue or "
+		    "failover Q pid %ld, State = %x., fcport state=%d "
+		    "jiffies=%lx retried=%d\n",
+		    dest_ha->host_no, cmd->serial_number, sp->state,
+		    atomic_read(&fcport->state), jiffies, cmd->retries));
+
+		if ((sp->state == SRB_RETRY_STATE)) {
+			__del_from_retry_queue(dest_ha, sp);
+		} else if ((sp->state == SRB_SCSI_RETRY_STATE)) {
+			__del_from_scsi_retry_queue(dest_ha, sp);
+		} 
+
+		/*
+		 * If FC_DEVICE is marked as dead return the cmd with
+		 * DID_NO_CONNECT status.  Otherwise set the host_byte to
+		 * DID_BUS_BUSY to let the OS  retry this cmd.
+		 */
+		if ((atomic_read(&fcport->state) == FCS_DEVICE_DEAD) ||
+		    atomic_read(&dest_ha->loop_state) == LOOP_DEAD) {
+			qla2x00_extend_timeout(cmd, EXTEND_CMD_TIMEOUT);
+			cmd->result = DID_NO_CONNECT << 16;
+			if (atomic_read(&dest_ha->loop_state) == LOOP_DOWN) 
+				sp->err_id = SRB_ERR_LOOP;
+			else
+				sp->err_id = SRB_ERR_PORT;
+		} else {
+			cmd->result = DID_BUS_BUSY << 16;
+		}
+
+		__add_to_done_queue(dest_ha, sp);
+		processed++;
+	} 
+	spin_unlock_irqrestore(&dest_ha->list_lock, flags);
+
+	if (processed) {
+		qla2x00_done(dest_ha);
+		return;
+	}
+
+	spin_lock_irqsave(&dest_ha->list_lock, cpu_flags);
+	if (sp->state == SRB_DONE_STATE) {
+		/* IO in done_q  -- leave it */
+		DEBUG(printk("scsi(%ld): Found in Done queue pid %ld sp=%p.\n",
+		    dest_ha->host_no, cmd->serial_number, sp));
+	} else if (sp->state == SRB_SUSPENDED_STATE) {
+		DEBUG(printk("scsi(%ld): Found SP %p in suspended state  "
+		    "- pid %ld:\n",
+		    dest_ha->host_no, sp, cmd->serial_number));
+		DEBUG(qla2x00_dump_buffer((uint8_t *)sp, sizeof(srb_t));)
+	} else if (sp->state == SRB_ACTIVE_STATE) {
+		/*
+		 * IO is with ISP find the command in our active list.
+		 */
+		spin_unlock_irqrestore(&dest_ha->list_lock, cpu_flags);
+		spin_lock_irqsave(&dest_ha->hardware_lock, flags);
+		if (sp == dest_ha->outstanding_cmds[
+		    (unsigned long)sp->cmd->host_scribble]) {
+
+			DEBUG(printk("cmd_timeout: Found in ISP \n"));
+
+			if (sp->flags & SRB_TAPE) {
+				/*
+				 * We cannot allow the midlayer error handler
+				 * to wakeup and begin the abort process.
+				 * Extend the timer so that the firmware can
+				 * properly return the IOCB.
+				 */
+				DEBUG(printk("cmd_timeout: Extending timeout "
+				    "of FCP2 tape command!\n"));
+				qla2x00_extend_timeout(sp->cmd,
+				    EXTEND_CMD_TIMEOUT);
+			}
+			sp->state = SRB_ACTIVE_TIMEOUT_STATE;
+			spin_unlock_irqrestore(&dest_ha->hardware_lock, flags);
+		} else {
+			spin_unlock_irqrestore(&dest_ha->hardware_lock, flags);
+			printk(KERN_INFO 
+				"qla_cmd_timeout: State indicates it is with "
+				"ISP, But not in active array\n");
+		}
+		spin_lock_irqsave(&dest_ha->list_lock, cpu_flags);
+	} else if (sp->state == SRB_ACTIVE_TIMEOUT_STATE) {
+		DEBUG(printk("qla2100%ld: Found in Active timeout state"
+				"pid %ld, State = %x., \n",
+				dest_ha->host_no,
+				sp->cmd->serial_number, sp->state);)
+	} else {
+		/* EMPTY */
+		DEBUG2(printk("cmd_timeout%ld: LOST command state = "
+				"0x%x, sp=%p\n",
+				vis_ha->host_no, sp->state,sp);)
+
+		qla_printk(KERN_INFO, vis_ha,
+			"cmd_timeout: LOST command state = 0x%x\n", sp->state);
+	}
+	spin_unlock_irqrestore(&dest_ha->list_lock, cpu_flags);
+
+	DEBUG3(printk("cmd_timeout: Leaving\n");)
+}
+
+/**************************************************************************
+* qla2x00_done
+*      Process completed commands.
+*
+* Input:
+*      old_ha           = adapter block pointer.
+*
+**************************************************************************/
+void
+qla2x00_done(scsi_qla_host_t *old_ha)
+{
+	os_lun_t	*lq;
+	struct scsi_cmnd *cmd;
+	unsigned long	flags = 0;
+	scsi_qla_host_t	*ha;
+	scsi_qla_host_t	*vis_ha;
+	int	send_marker_once = 0;
+	srb_t           *sp, *sptemp;
+	LIST_HEAD(local_sp_list);
+
+	/*
+	 * Get into local queue such that we do not wind up calling done queue
+	 * tasklet for the same IOs from DPC or any other place.
+	 */
+	spin_lock_irqsave(&old_ha->list_lock, flags);
+	list_splice_init(&old_ha->done_queue, &local_sp_list);
+	spin_unlock_irqrestore(&old_ha->list_lock, flags);
+
+	/*
+	 * All done commands are in the local queue, now do the call back.
+	 */
+	list_for_each_entry_safe(sp, sptemp, &local_sp_list, list) {
+		old_ha->done_q_cnt--;
+        	sp->state = SRB_NO_QUEUE_STATE;
+
+		/* remove command from local list */
+		list_del_init(&sp->list);
+
+		cmd = sp->cmd;
+		if (cmd == NULL)
+		 	continue;
+
+		vis_ha = (scsi_qla_host_t *)cmd->device->host->hostdata;
+		lq = sp->lun_queue;
+		ha = sp->ha;
+
+		if (sp->flags & SRB_DMA_VALID) {
+			sp->flags &= ~SRB_DMA_VALID;
+
+			/* Release memory used for this I/O */
+			if (cmd->use_sg) {
+				pci_unmap_sg(ha->pdev, cmd->request_buffer,
+				    cmd->use_sg, cmd->sc_data_direction);
+			} else if (cmd->request_bufflen) {
+				pci_unmap_page(ha->pdev, sp->dma_handle,
+				    cmd->request_bufflen,
+				    cmd->sc_data_direction);
+			}
+		}
+
+
+		switch (host_byte(cmd->result)) {
+			case DID_OK:
+			case DID_ERROR:
+				break;
+
+			case DID_RESET:
+				/*
+				 * Set marker needed, so we don't have to
+				 * send multiple markers
+				 */
+				if (!send_marker_once) {
+					ha->marker_needed = 1;
+					send_marker_once++;
+				}
+
+				/*
+				 * WORKAROUND
+				 *
+				 * A backdoor device-reset requires different
+				 * error handling.  This code differentiates
+				 * between normal error handling and the
+				 * backdoor method.
+				 *
+				 */
+				if (ha->host->eh_active != EH_ACTIVE)
+					cmd->result = DID_BUS_BUSY << 16;
+				break;
+
+
+			case DID_ABORT:
+				sp->flags &= ~SRB_ABORT_PENDING;
+				sp->flags |= SRB_ABORTED;
+
+				if (sp->flags & SRB_TIMEOUT)
+					cmd->result = DID_TIME_OUT << 16;
+
+				break;
+
+			default:
+				DEBUG2(printk("scsi(%ld:%d:%d) %s: did_error "
+				    "= %d, comp-scsi= 0x%x-0x%x pid=%ld.\n",
+				    vis_ha->host_no,
+				    cmd->device->id, cmd->device->lun,
+				    __func__,
+				    host_byte(cmd->result),
+				    CMD_COMPL_STATUS(cmd),
+				    CMD_SCSI_STATUS(cmd), cmd->serial_number));
+				break;
+		}
+
+		/*
+		 * Call the mid-level driver interrupt handler -- via sp_put()
+		 */
+		sp_put(ha, sp);
+	} /* end of while */
+}
+
+/*
+ * qla2x00_process_response_queue_in_zio_mode
+ *	Process response queue completion as fast as possible
+ *	to achieve Zero Interrupt Opertions-ZIO
+ *
+ * Input:
+ *	ha = adapter block pointer.
+ *
+ * Context:
+ *	Kernel context.
+ */
+static inline void
+qla2x00_process_response_queue_in_zio_mode(scsi_qla_host_t *ha)
+{
+	unsigned long flags;
+
+	/* Check for unprocessed commands in response queue. */
+	if (!ha->flags.process_response_queue)
+		return;
+	if (!ha->flags.online)
+		return;
+	if (ha->response_ring_ptr->signature == RESPONSE_PROCESSED)
+		return;
+	
+	spin_lock_irqsave(&ha->hardware_lock,flags);
+	qla2x00_process_response_queue(ha);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+
+/*
+ * qla2x00_next
+ *	Retrieve and process next job in the LUN queue.
+ *
+ * Input:
+ *	tq = SCSI target queue pointer.
+ *	lq = SCSI LUN queue pointer.
+ *	TGT_LOCK must be already obtained.
+ *
+ * Output:
+ *	Releases TGT_LOCK upon exit.
+ *
+ * Context:
+ *	Kernel/Interrupt context.
+ * 
+ * Note: This routine will always try to start I/O from visible HBA.
+ */
+void
+qla2x00_next(scsi_qla_host_t *vis_ha) 
+{
+	int		rval;
+	unsigned long   flags;
+	scsi_qla_host_t *dest_ha;
+	fc_port_t	*fcport;
+	srb_t           *sp, *sptemp;
+	LIST_HEAD(local_sp_list);
+
+	dest_ha = NULL;
+
+	spin_lock_irqsave(&vis_ha->list_lock, flags);
+	list_splice_init(&vis_ha->pending_queue, &local_sp_list);
+	vis_ha->qthreads = 0;
+	spin_unlock_irqrestore(&vis_ha->list_lock, flags);
+
+	list_for_each_entry_safe(sp, sptemp, &local_sp_list, list) {
+		list_del_init(&sp->list);
+        	sp->state = SRB_NO_QUEUE_STATE;
+
+		fcport = sp->fclun->fcport;
+		dest_ha = fcport->ha;
+
+		/* If device is dead then send request back to OS */
+		if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD) {
+			sp->cmd->result = DID_NO_CONNECT << 16;
+			if (atomic_read(&dest_ha->loop_state) == LOOP_DOWN) 
+				sp->err_id = SRB_ERR_LOOP;
+			else
+				sp->err_id = SRB_ERR_PORT;
+
+			DEBUG3(printk("scsi(%ld): loop/port is down - pid=%ld, "
+			    "sp=%p err_id=%d loopid=0x%x queued to dest HBA "
+			    "scsi%ld.\n", dest_ha->host_no,
+			    sp->cmd->serial_number, sp, sp->err_id,
+			    fcport->loop_id, dest_ha->host_no));
+			/* 
+			 * Initiate a failover - done routine will initiate.
+			 */
+			add_to_done_queue(vis_ha, sp);
+
+			continue;
+		}
+
+		/*
+		 * SCSI Kluge: Whenever, we need to wait for an event such as
+		 * loop down (i.e. loop_down_timer ) or port down (i.e.  LUN
+		 * request qeueue is suspended) then we will recycle new
+		 * commands back to the SCSI layer.  We do this because this is
+		 * normally a temporary condition and we don't want the
+		 * mid-level scsi.c driver to get upset and start aborting
+		 * commands.  The timeout value is extracted from the command
+		 * minus 1-second and put on a retry queue (watchdog). Once the
+		 * command timeout it is returned to the mid-level with a BUSY
+		 * status, so the mid-level will retry it. This process
+		 * continues until the LOOP DOWN time expires or the condition
+		 * goes away.
+		 */
+		if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
+		    (atomic_read(&fcport->state) != FCS_ONLINE ||
+			test_bit(ABORT_ISP_ACTIVE, &dest_ha->dpc_flags) ||
+			atomic_read(&dest_ha->loop_state) != LOOP_READY)) {
+
+			DEBUG3(printk("scsi(%ld): pid=%ld port=0x%x state=%d "
+			    "loop state=%d, loop counter=0x%x "
+			    "dpc_flags=0x%lx\n", sp->cmd->serial_number,
+			    dest_ha->host_no, fcport->loop_id,
+			    atomic_read(&fcport->state),
+			    atomic_read(&dest_ha->loop_state),
+			    atomic_read(&dest_ha->loop_down_timer),
+			    dest_ha->dpc_flags));
+
+			qla2x00_extend_timeout(sp->cmd, EXTEND_CMD_TIMEOUT);
+			add_to_retry_queue(vis_ha, sp);
+
+			continue;
+		} 
+
+		/*
+		 * If this request's lun is suspended then put the request on
+		 * the  scsi_retry queue. 
+		 */
+	 	if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
+		    sp->lun_queue->q_state == LUN_STATE_WAIT) {
+			DEBUG3(printk("scsi(%ld): lun wait state - pid=%ld, "
+			    "opcode=%d, allowed=%d, retries=%d\n",
+			    dest_ha->host_no,
+			    sp->cmd->serial_number,
+			    sp->cmd->cmnd[0],
+			    sp->cmd->allowed,
+			    sp->cmd->retries));
+				
+			add_to_scsi_retry_queue(vis_ha, sp);
+
+			continue;
+		}
+
+		sp->lun_queue->io_cnt++;
+
+		rval = qla2x00_start_scsi(sp);
+		if (rval != QLA_SUCCESS) {
+			/* Place request back on top of device queue */
+			/* add to the top of queue */
+			add_to_pending_queue_head(vis_ha, sp);
+
+			sp->lun_queue->io_cnt--;
+		}
+	}
+
+	if (!IS_QLA2100(vis_ha) && !IS_QLA2200(vis_ha)) {
+		/* Process response_queue if ZIO support is enabled*/ 
+		qla2x00_process_response_queue_in_zio_mode(vis_ha);
+
+	}
+}
+
+/* XXX(hch): crude hack to emulate a down_timeout() */
+int
+qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
+{
+	const unsigned int step = HZ/10;
+
+	do {
+		if (!down_trylock(sema))
+			return 0;
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (schedule_timeout(step))
+			break;
+	} while ((timeout -= step) > 0);
+
+	return -ETIMEDOUT;
+}
+
+static void
+qla2xxx_get_port_id(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	scsi_qla_host_t *ha = to_qla_host(shost);
+	struct fc_port *fc;
+
+	list_for_each_entry(fc, &ha->fcports, list) {
+		if (fc->os_target_id == starget->id) {
+			fc_starget_port_id(starget) = fc->d_id.b.domain << 16 |
+				fc->d_id.b.area << 8 | 
+				fc->d_id.b.al_pa;
+			return;
+		}
+	}
+	fc_starget_port_id(starget) = -1;
+}
+
+static void
+qla2xxx_get_port_name(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	scsi_qla_host_t *ha = to_qla_host(shost);
+	struct fc_port *fc;
+
+	list_for_each_entry(fc, &ha->fcports, list) {
+		if (fc->os_target_id == starget->id) {
+			fc_starget_port_name(starget) =
+				__be64_to_cpu(*(uint64_t *)fc->port_name);
+			return;
+		}
+	}
+	fc_starget_port_name(starget) = -1;
+}
+
+static void
+qla2xxx_get_node_name(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+	scsi_qla_host_t *ha = to_qla_host(shost);
+	struct fc_port *fc;
+
+	list_for_each_entry(fc, &ha->fcports, list) {
+		if (fc->os_target_id == starget->id) {
+			fc_starget_node_name(starget) =
+				__be64_to_cpu(*(uint64_t *)fc->node_name);
+			return;
+		}
+	}
+	fc_starget_node_name(starget) = -1;
+}
+
+static struct fc_function_template qla2xxx_transport_functions = {
+	.get_starget_port_id = qla2xxx_get_port_id,
+	.show_starget_port_id = 1,
+	.get_starget_port_name = qla2xxx_get_port_name,
+	.show_starget_port_name = 1,
+	.get_starget_node_name = qla2xxx_get_node_name,
+	.show_starget_node_name = 1,
+};
+
+/**
+ * qla2x00_module_init - Module initialization.
+ **/
+static int __init
+qla2x00_module_init(void)
+{
+	/* Allocate cache for SRBs. */
+	sprintf(srb_cachep_name, "qla2xxx_srbs");
+	srb_cachep = kmem_cache_create(srb_cachep_name, 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 DEBUG_QLA2100
+	strcat(qla2x00_version_str, "-debug");
+#endif
+
+	qla2xxx_transport_template = fc_attach_transport(&qla2xxx_transport_functions);
+	if (!qla2xxx_transport_template)
+		return -ENODEV;
+
+	printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
+	return 0;
+}
+
+/**
+ * qla2x00_module_exit - Module cleanup.
+ **/
+static void __exit
+qla2x00_module_exit(void)
+{
+	/* Free SRBs cache. */
+	if (srb_cachep != NULL) {
+		if (kmem_cache_destroy(srb_cachep) != 0) {
+			printk(KERN_ERR
+			    "qla2xxx: Unable to free SRB cache...Memory pools "
+			    "still active?\n");
+		}
+		srb_cachep = NULL;
+	}
+
+	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);